WO2016136025A1 - 高圧水素に触れる成形品用のポリアミド樹脂組成物およびそれを用いた成形品 - Google Patents
高圧水素に触れる成形品用のポリアミド樹脂組成物およびそれを用いた成形品 Download PDFInfo
- Publication number
- WO2016136025A1 WO2016136025A1 PCT/JP2015/080093 JP2015080093W WO2016136025A1 WO 2016136025 A1 WO2016136025 A1 WO 2016136025A1 JP 2015080093 W JP2015080093 W JP 2015080093W WO 2016136025 A1 WO2016136025 A1 WO 2016136025A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- polyamide
- resin
- polyamide resin
- resin composition
- pressure hydrogen
- Prior art date
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- 229920006122 polyamide resin Polymers 0.000 title claims abstract description 183
- 239000001257 hydrogen Substances 0.000 title claims abstract description 105
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 105
- 239000011342 resin composition Substances 0.000 title claims abstract description 93
- 125000004435 hydrogen atom Chemical class [H]* 0.000 title 1
- 229920005989 resin Polymers 0.000 claims abstract description 180
- 239000011347 resin Substances 0.000 claims abstract description 180
- 229920002292 Nylon 6 Polymers 0.000 claims abstract description 101
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 89
- 238000002425 crystallisation Methods 0.000 claims abstract description 78
- 230000008025 crystallization Effects 0.000 claims abstract description 78
- 238000002844 melting Methods 0.000 claims abstract description 74
- 230000008018 melting Effects 0.000 claims abstract description 74
- 238000001816 cooling Methods 0.000 claims abstract description 26
- 150000002431 hydrogen Chemical class 0.000 claims abstract description 20
- 239000000203 mixture Substances 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims description 37
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 27
- 239000004917 carbon fiber Substances 0.000 claims description 27
- 238000000465 moulding Methods 0.000 claims description 27
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 25
- 238000005259 measurement Methods 0.000 claims description 24
- 239000010410 layer Substances 0.000 claims description 17
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 14
- 239000005977 Ethylene Substances 0.000 claims description 14
- 239000004711 α-olefin Substances 0.000 claims description 13
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 11
- 229920000305 Nylon 6,10 Polymers 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 229920000089 Cyclic olefin copolymer Polymers 0.000 claims description 6
- 238000000149 argon plasma sintering Methods 0.000 claims description 6
- 239000002344 surface layer Substances 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 description 52
- -1 Aliphatic diamines Chemical class 0.000 description 31
- 239000000047 product Substances 0.000 description 30
- 230000007547 defect Effects 0.000 description 21
- 238000011049 filling Methods 0.000 description 20
- 238000002156 mixing Methods 0.000 description 17
- 230000000052 comparative effect Effects 0.000 description 16
- 229920001577 copolymer Polymers 0.000 description 16
- 239000013078 crystal Substances 0.000 description 14
- 229920001971 elastomer Polymers 0.000 description 14
- 239000000835 fiber Substances 0.000 description 13
- 230000000694 effects Effects 0.000 description 12
- 238000004898 kneading Methods 0.000 description 11
- 229910052751 metal Inorganic materials 0.000 description 11
- 239000005060 rubber Substances 0.000 description 11
- 239000004952 Polyamide Substances 0.000 description 10
- 239000007789 gas Substances 0.000 description 10
- 239000011159 matrix material Substances 0.000 description 10
- 239000002184 metal Substances 0.000 description 10
- 239000002667 nucleating agent Substances 0.000 description 10
- 239000008188 pellet Substances 0.000 description 10
- 229920002647 polyamide Polymers 0.000 description 10
- 239000000243 solution Substances 0.000 description 10
- 239000010959 steel Substances 0.000 description 10
- 229920005992 thermoplastic resin Polymers 0.000 description 10
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000000155 melt Substances 0.000 description 9
- 229920000642 polymer Polymers 0.000 description 9
- 239000003822 epoxy resin Substances 0.000 description 8
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 8
- 239000000178 monomer Substances 0.000 description 8
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- 229920005672 polyolefin resin Polymers 0.000 description 8
- 239000010935 stainless steel Substances 0.000 description 8
- 229910001220 stainless steel Inorganic materials 0.000 description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 8
- 229920002302 Nylon 6,6 Polymers 0.000 description 7
- 229910000838 Al alloy Inorganic materials 0.000 description 6
- 229910000975 Carbon steel Inorganic materials 0.000 description 6
- 239000005749 Copper compound Substances 0.000 description 6
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 6
- 239000004918 carbon fiber reinforced polymer Substances 0.000 description 6
- 239000010962 carbon steel Substances 0.000 description 6
- 150000001880 copper compounds Chemical class 0.000 description 6
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 6
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 6
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- FVAUCKIRQBBSSJ-UHFFFAOYSA-M sodium iodide Chemical compound [Na+].[I-] FVAUCKIRQBBSSJ-UHFFFAOYSA-M 0.000 description 6
- 229920001187 thermosetting polymer Polymers 0.000 description 6
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 5
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- 238000001746 injection moulding Methods 0.000 description 5
- YWAKXRMUMFPDSH-UHFFFAOYSA-N pentene Chemical compound CCCC=C YWAKXRMUMFPDSH-UHFFFAOYSA-N 0.000 description 5
- 238000006116 polymerization reaction Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 5
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 5
- PXGZQGDTEZPERC-UHFFFAOYSA-N 1,4-cyclohexanedicarboxylic acid Chemical compound OC(=O)C1CCC(C(O)=O)CC1 PXGZQGDTEZPERC-UHFFFAOYSA-N 0.000 description 4
- PBLZLIFKVPJDCO-UHFFFAOYSA-N 12-aminododecanoic acid Chemical compound NCCCCCCCCCCCC(O)=O PBLZLIFKVPJDCO-UHFFFAOYSA-N 0.000 description 4
- CNPURSDMOWDNOQ-UHFFFAOYSA-N 4-methoxy-7h-pyrrolo[2,3-d]pyrimidin-2-amine Chemical compound COC1=NC(N)=NC2=C1C=CN2 CNPURSDMOWDNOQ-UHFFFAOYSA-N 0.000 description 4
- SLXKOJJOQWFEFD-UHFFFAOYSA-N 6-aminohexanoic acid Chemical compound NCCCCCC(O)=O SLXKOJJOQWFEFD-UHFFFAOYSA-N 0.000 description 4
- 229910000851 Alloy steel Inorganic materials 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 229910000617 Mangalloy Inorganic materials 0.000 description 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 4
- 229920003189 Nylon 4,6 Polymers 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 150000001336 alkenes Chemical class 0.000 description 4
- 229960002684 aminocaproic acid Drugs 0.000 description 4
- VHRGRCVQAFMJIZ-UHFFFAOYSA-N cadaverine Chemical compound NCCCCCN VHRGRCVQAFMJIZ-UHFFFAOYSA-N 0.000 description 4
- 125000004432 carbon atom Chemical group C* 0.000 description 4
- 238000012937 correction Methods 0.000 description 4
- XBZSBBLNHFMTEB-UHFFFAOYSA-N cyclohexane-1,3-dicarboxylic acid Chemical compound OC(=O)C1CCCC(C(O)=O)C1 XBZSBBLNHFMTEB-UHFFFAOYSA-N 0.000 description 4
- 239000003063 flame retardant Substances 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- NAQMVNRVTILPCV-UHFFFAOYSA-N hexane-1,6-diamine Chemical compound NCCCCCCN NAQMVNRVTILPCV-UHFFFAOYSA-N 0.000 description 4
- 229910052738 indium Inorganic materials 0.000 description 4
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 4
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 4
- 229910052750 molybdenum Inorganic materials 0.000 description 4
- 239000011733 molybdenum Substances 0.000 description 4
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 description 4
- KIDHWZJUCRJVML-UHFFFAOYSA-N putrescine Chemical compound NCCCCN KIDHWZJUCRJVML-UHFFFAOYSA-N 0.000 description 4
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 description 4
- TYFQFVWCELRYAO-UHFFFAOYSA-N suberic acid Chemical compound OC(=O)CCCCCCC(O)=O TYFQFVWCELRYAO-UHFFFAOYSA-N 0.000 description 4
- 229910052623 talc Inorganic materials 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 150000001413 amino acids Chemical class 0.000 description 3
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- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- XTVVROIMIGLXTD-UHFFFAOYSA-N copper(II) nitrate Chemical compound [Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O XTVVROIMIGLXTD-UHFFFAOYSA-N 0.000 description 3
- 238000013461 design Methods 0.000 description 3
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- WNLRTRBMVRJNCN-UHFFFAOYSA-N hexanedioic acid Natural products OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 3
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- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 3
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- ZGEGCLOFRBLKSE-UHFFFAOYSA-N 1-Heptene Chemical compound CCCCCC=C ZGEGCLOFRBLKSE-UHFFFAOYSA-N 0.000 description 2
- VQOXUMQBYILCKR-UHFFFAOYSA-N 1-Tridecene Chemical compound CCCCCCCCCCCC=C VQOXUMQBYILCKR-UHFFFAOYSA-N 0.000 description 2
- AFFLGGQVNFXPEV-UHFFFAOYSA-N 1-decene Chemical compound CCCCCCCCC=C AFFLGGQVNFXPEV-UHFFFAOYSA-N 0.000 description 2
- CRSBERNSMYQZNG-UHFFFAOYSA-N 1-dodecene Chemical compound CCCCCCCCCCC=C CRSBERNSMYQZNG-UHFFFAOYSA-N 0.000 description 2
- ADOBXTDBFNCOBN-UHFFFAOYSA-N 1-heptadecene Chemical compound CCCCCCCCCCCCCCCC=C ADOBXTDBFNCOBN-UHFFFAOYSA-N 0.000 description 2
- GQEZCXVZFLOKMC-UHFFFAOYSA-N 1-hexadecene Chemical compound CCCCCCCCCCCCCCC=C GQEZCXVZFLOKMC-UHFFFAOYSA-N 0.000 description 2
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 description 2
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- DPQHRXRAZHNGRU-UHFFFAOYSA-N 2,4,4-trimethylhexane-1,6-diamine Chemical compound NCC(C)CC(C)(C)CCN DPQHRXRAZHNGRU-UHFFFAOYSA-N 0.000 description 2
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- ZPXGNBIFHQKREO-UHFFFAOYSA-N 2-chloroterephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C(Cl)=C1 ZPXGNBIFHQKREO-UHFFFAOYSA-N 0.000 description 2
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- IGSBHTZEJMPDSZ-UHFFFAOYSA-N 4-[(4-amino-3-methylcyclohexyl)methyl]-2-methylcyclohexan-1-amine Chemical compound C1CC(N)C(C)CC1CC1CC(C)C(N)CC1 IGSBHTZEJMPDSZ-UHFFFAOYSA-N 0.000 description 2
- BDBZTOMUANOKRT-UHFFFAOYSA-N 4-[2-(4-aminocyclohexyl)propan-2-yl]cyclohexan-1-amine Chemical compound C1CC(N)CCC1C(C)(C)C1CCC(N)CC1 BDBZTOMUANOKRT-UHFFFAOYSA-N 0.000 description 2
- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 description 2
- MBRGOFWKNLPACT-UHFFFAOYSA-N 5-methylnonane-1,9-diamine Chemical compound NCCCCC(C)CCCCN MBRGOFWKNLPACT-UHFFFAOYSA-N 0.000 description 2
- GVNWZKBFMFUVNX-UHFFFAOYSA-N Adipamide Chemical compound NC(=O)CCCCC(N)=O GVNWZKBFMFUVNX-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 229910021595 Copper(I) iodide Inorganic materials 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
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- PEEHTFAAVSWFBL-UHFFFAOYSA-N Maleimide Chemical compound O=C1NC(=O)C=C1 PEEHTFAAVSWFBL-UHFFFAOYSA-N 0.000 description 2
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229930182556 Polyacetal Natural products 0.000 description 2
- 239000004697 Polyetherimide Substances 0.000 description 2
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- 239000004743 Polypropylene Substances 0.000 description 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- QLBRROYTTDFLDX-UHFFFAOYSA-N [3-(aminomethyl)cyclohexyl]methanamine Chemical compound NCC1CCCC(CN)C1 QLBRROYTTDFLDX-UHFFFAOYSA-N 0.000 description 2
- OXIKYYJDTWKERT-UHFFFAOYSA-N [4-(aminomethyl)cyclohexyl]methanamine Chemical compound NCC1CCC(CN)CC1 OXIKYYJDTWKERT-UHFFFAOYSA-N 0.000 description 2
- ISKQADXMHQSTHK-UHFFFAOYSA-N [4-(aminomethyl)phenyl]methanamine Chemical compound NCC1=CC=C(CN)C=C1 ISKQADXMHQSTHK-UHFFFAOYSA-N 0.000 description 2
- 150000008065 acid anhydrides Chemical class 0.000 description 2
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- 235000011037 adipic acid Nutrition 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- IMUDHTPIFIBORV-UHFFFAOYSA-N aminoethylpiperazine Chemical compound NCCN1CCNCC1 IMUDHTPIFIBORV-UHFFFAOYSA-N 0.000 description 2
- QCTBMLYLENLHLA-UHFFFAOYSA-N aminomethylbenzoic acid Chemical compound NCC1=CC=C(C(O)=O)C=C1 QCTBMLYLENLHLA-UHFFFAOYSA-N 0.000 description 2
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- 238000004458 analytical method Methods 0.000 description 2
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- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 2
- PXKLMJQFEQBVLD-UHFFFAOYSA-N bisphenol F Chemical compound C1=CC(O)=CC=C1CC1=CC=C(O)C=C1 PXKLMJQFEQBVLD-UHFFFAOYSA-N 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
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- HNEGQIOMVPPMNR-IHWYPQMZSA-N citraconic acid Chemical compound OC(=O)C(/C)=C\C(O)=O HNEGQIOMVPPMNR-IHWYPQMZSA-N 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- YEOCHZFPBYUXMC-UHFFFAOYSA-L copper benzoate Chemical compound [Cu+2].[O-]C(=O)C1=CC=CC=C1.[O-]C(=O)C1=CC=CC=C1 YEOCHZFPBYUXMC-UHFFFAOYSA-L 0.000 description 2
- RFKZUAOAYVHBOY-UHFFFAOYSA-M copper(1+);acetate Chemical compound [Cu+].CC([O-])=O RFKZUAOAYVHBOY-UHFFFAOYSA-M 0.000 description 2
- ORTQZVOHEJQUHG-UHFFFAOYSA-L copper(II) chloride Chemical compound Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 description 2
- LSXDOTMGLUJQCM-UHFFFAOYSA-M copper(i) iodide Chemical compound I[Cu] LSXDOTMGLUJQCM-UHFFFAOYSA-M 0.000 description 2
- OPQARKPSCNTWTJ-UHFFFAOYSA-L copper(ii) acetate Chemical compound [Cu+2].CC([O-])=O.CC([O-])=O OPQARKPSCNTWTJ-UHFFFAOYSA-L 0.000 description 2
- QTMDXZNDVAMKGV-UHFFFAOYSA-L copper(ii) bromide Chemical compound [Cu+2].[Br-].[Br-] QTMDXZNDVAMKGV-UHFFFAOYSA-L 0.000 description 2
- 239000007822 coupling agent Substances 0.000 description 2
- 239000006059 cover glass Substances 0.000 description 2
- QSAWQNUELGIYBC-UHFFFAOYSA-N cyclohexane-1,2-dicarboxylic acid Chemical compound OC(=O)C1CCCCC1C(O)=O QSAWQNUELGIYBC-UHFFFAOYSA-N 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 150000001990 dicarboxylic acid derivatives Chemical class 0.000 description 2
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Images
Classifications
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- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
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- F17C13/00—Details of vessels or of the filling or discharging of vessels
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0602—Wall structures; Special features thereof
- F17C2203/0604—Liners
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
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- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
- F17C2205/0323—Valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/01—Pure fluids
- F17C2221/012—Hydrogen
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2270/00—Applications
- F17C2270/01—Applications for fluid transport or storage
- F17C2270/0165—Applications for fluid transport or storage on the road
- F17C2270/0184—Fuel cells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/32—Hydrogen storage
Definitions
- the present invention relates to a polyamide resin composition for a molded product that comes into contact with high-pressure hydrogen, which is obtained by blending a specific amount of a specific polyamide resin with a polyamide 6 resin, and a molded product obtained by molding it.
- a hydrogen tank liner material having excellent gas barrier properties and excellent impact resistance even at low temperatures
- a hydrogen tank liner material comprising a polyamide resin composition including polyamide 6, copolymerized polyamide, and an impact resistant material has been studied.
- a hydrogen tank liner material comprising a polyamide resin composition including polyamide 6, copolymerized polyamide, and an impact resistant material has been studied.
- a polyamide resin composition comprising a resin and an ethylene copolymer elastomer resin has been studied (see, for example, Patent Document 2).
- gas storage tank liner having excellent gas barrier properties for example, a gas storage tank liner containing a polymer composition containing polyamide, a nucleating agent, and an impact resistance improving agent has been studied (for example, Patent Documents). 3).
- injection molding is an example of a method for producing a molded product that comes into contact with high-pressure hydrogen.
- a fragile portion called a weld is easily formed at a portion where molten resin joins in a mold.
- a V-shaped groove called a weld line resulting from poor adhesion may be formed, resulting in poor appearance.
- strength and toughness may be reduced due to stress concentration (notch effect). Therefore, high weld characteristics are required in designing a molded product.
- Patent Document 1 the hydrogen tank liner described in Patent Document 1 is likely to cause permeation of hydrogen gas and dissolution of hydrogen into the resin, and defects are generated in the hydrogen tank liner when repeated filling and releasing of high-pressure hydrogen. There was a problem. In addition, the compatibility of the polyamide resin is low, and there is a problem in weld characteristics.
- Patent Document 2 Although the resin composition described in Patent Document 2 is excellent in low temperature toughness, it easily causes hydrogen gas permeation and dissolution of hydrogen in the resin. There was a problem that a defective point was generated in the liner. In addition, the compatibility of the polyamide resin is low, and there is a problem in weld characteristics.
- the gas storage tank liner described in Patent Document 3 is excellent in helium gas permeation resistance, but easily permeates hydrogen gas or dissolves hydrogen in a resin. When the process was repeated, there was a problem that defects occurred in the hydrogen tank liner. Further, the dispersibility of the nucleating agent in polyamide and the adhesion between the polyamide and the nucleating agent are low, and there is a problem in weld characteristics.
- the present invention provides a polyamide resin composition in which generation of defects is suppressed and molded products having excellent weld characteristics can be obtained even when high-pressure hydrogen filling and releasing pressure are repeated in view of the above-described problems of the prior art. This is the issue.
- the present invention has the following configuration.
- the melting point of the polyamide 6 resin (A) and the DSC measurement is not higher than the melting point of the polyamide 6 resin (A) + 20 ° C., and the cooling crystallization temperature by the DSC measurement is higher than the cooling crystallization temperature of the polyamide 6 resin (A).
- a polyamide resin composition comprising a polyamide resin (B) and 0.01 to 5 parts by weight of the polyamide resin (B) per 100 parts by weight of the polyamide 6 resin (A)
- the present invention includes a molded article formed by molding the above polyamide resin composition and in contact with high-pressure hydrogen.
- the present invention includes a tank liner for high pressure hydrogen comprising the above polyamide resin composition.
- the present invention includes a high-pressure hydrogen tank in which a carbon fiber reinforced resin reinforcing layer is laminated on the surface layer of a tank liner made of the polyamide resin composition.
- the polyamide resin composition for molded articles that come into contact with high-pressure hydrogen according to the present invention has a high crystallization rate, suppresses the occurrence of defect points even after repeated filling and releasing of high-pressure hydrogen, and has excellent weld characteristics. Can be provided.
- the molded article of the present invention is less likely to cause defects even after repeated filling and releasing of high-pressure hydrogen, and is usefully developed as a molded article for use in contact with high-pressure hydrogen, taking advantage of its excellent weld characteristics. It becomes possible.
- polyamide resin composition for molded articles that comes into contact with high-pressure hydrogen of the present invention
- polyamide resin composition includes a polyamide 6 resin (A) and a polyamide 6 resin having a melting point by DSC measurement.
- a polyamide resin composition comprising (A) a melting point of + 20 ° C. or lower and a polyamide resin (B) whose temperature-falling crystallization temperature by DSC measurement is higher than that of polyamide 6 resin (A). Further, 0.01 to 5 parts by weight of the polyamide resin (B) is blended with 100 parts by weight of the polyamide 6 resin (A).
- polyamide resin (B) By blending a specific amount of polyamide resin (B) with polyamide 6 resin (A), which has an excellent balance of moldability, gas barrier properties, rigidity and toughness, the crystallization speed is increased and dense and uniform crystals are formed. Therefore, since permeation of hydrogen gas and dissolution of hydrogen into the resin can be suppressed, defect points are unlikely to occur even when high-pressure hydrogen is repeatedly charged and released. Further, since a dense and uniform crystal is formed, the adhesion of the molten resin in the weld portion is improved, and a molded product having excellent weld characteristics such as weld strength and weld toughness can be obtained.
- the combination of the polyamide 6 resin (A) and the organic nucleating agent or inorganic nucleating agent other than the polyamide (B) increases the crystallization speed, but produces a dense and uniform crystal compared to the polyamide resin (B). Since it is not formed, if filling and releasing of high-pressure hydrogen are repeated, defect points are likely to be generated, and weld characteristics are deteriorated.
- the polyamide 6 resin (A) used in the present invention is a polyamide resin mainly composed of 6-aminocaproic acid and / or ⁇ -caprolactam. Other monomers may be copolymerized as long as the object of the present invention is not impaired.
- “to be used as a main raw material” includes a unit derived from 6-aminocaproic acid or a unit derived from ⁇ -caprolactam in a total of 50 mol% in a total of 100 mol% of monomer units constituting the polyamide resin. Means. More preferably, it contains 70 mol% or more, more preferably 90 mol% or more of 6-aminocaproic acid-derived units or ⁇ -caprolactam-derived units.
- Examples of other monomers to be copolymerized include, for example, amino acids such as 11-aminoundecanoic acid, 12-aminododecanoic acid and paraaminomethylbenzoic acid, lactams such as ⁇ -laurolactam; tetramethylenediamine, pentamethylenediamine, Aliphatic diamines such as hexamethylenediamine, 2-methylpentamethylenediamine, undecamethylenediamine, dodecamethylenediamine, 2,2,4- / 2,4,4-trimethylhexamethylenediamine, 5-methylnonamethylenediamine; Aromatic diamines such as metaxylenediamine and paraxylylenediamine; 1,3-bis (aminomethyl) cyclohexane, 1,4-bis (aminomethyl) cyclohexane, 1-amino-3-aminomethyl-3,5,5 -Trimethylcyclohexane, bis (4- Alicyclic diamines such
- the degree of polymerization of the polyamide 6 resin (A) is not particularly limited, but the relative viscosity measured at 25 ° C. in a 98% concentrated sulfuric acid solution having a resin concentration of 0.01 g / ml is in the range of 1.5 to 7.0. It is preferable that When the relative viscosity is 1.5 or more, the melt viscosity of the polyamide resin composition at the time of molding becomes moderately high, the air entrainment at the time of molding can be suppressed, and the moldability can be further improved.
- the relative viscosity is more preferably 1.8 or more. On the other hand, if the relative viscosity is 7.0 or less, the melt viscosity at the time of molding of the polyamide resin composition becomes moderately low, and the moldability can be further improved.
- the amount of amino terminal groups of the polyamide resin (A) is not particularly limited, but is preferably in the range of 1.0 to 10.0 ⁇ 10 ⁇ 5 mol / g.
- the amino terminal group amount is in the range of 1.0 to 10.0 ⁇ 10 ⁇ 5 mol / g, a sufficient degree of polymerization can be obtained, and the mechanical strength of the molded product can be improved.
- the amount of amino terminal groups of the polyamide resin (A) was determined by dissolving the polyamide resin (A) in a phenol / ethanol mixed solvent (83.5: 16.5 (volume ratio)), and adding 0.02N hydrochloric acid aqueous solution. It can obtain
- the polyamide resin (B) used in the present invention has a melting point by DSC measurement of the melting point of the polyamide 6 resin (A) + 20 ° C. or less, and a cooling crystallization temperature by DSC measurement is the cooling crystallization of the polyamide 6 resin (A). Polyamide resin higher than temperature.
- the melting point and the cooling crystallization temperature of the polyamide 6 resin (A) and the polyamide resin (B) in the present invention by DSC measurement can be determined by the following methods. First, using a differential scanning calorimeter (DSC-7 manufactured by Perkin Elmer), two-point calibration (indium, lead) and baseline correction are performed. The sample amount was set to 8 to 10 mg, held at a temperature 15 ° C. higher than the temperature showing the maximum value of the melting curve obtained by heating at a heating rate of 20 ° C./min, and then cooled down at 20 ° C./min. Cool to 30 ° C at speed. The crystallization exothermic peak temperature observed in this cooling step is defined as the temperature drop crystallization temperature.
- DSC-7 differential scanning calorimeter
- the second temperature raising step is performed at a rate of 20 ° C./min, similarly to the first temperature raising step.
- the melting endothermic peak temperature observed in the second temperature raising step is defined as the melting point.
- the melting point of the polyamide resin (B) is preferably the melting point of the polyamide 6 resin (A) + 15 ° C. or less, more preferably the melting point of the polyamide 6 resin (A) + 12 ° C. or less, and the melting point of the polyamide 6 resin (A) + 10 ° C. or less. Further preferred.
- the melting point of the polyamide resin (B) is equal to or lower than the melting point of the polyamide 6 resin (A) + 10 ° C., the temperature range of the solid-liquid phase separation state between the polyamide 6 resin (A) and the polyamide resin (B) is narrowed. As a result, the crystallization speed is improved.
- the lower limit of the melting point of the polyamide resin (B) is not particularly limited, but the melting point of the polyamide 6 resin (A) is + 1 ° C. or higher. This is preferable because it tends to be easily made.
- the temperature-falling crystallization temperature of the polyamide resin (B) is equal to or lower than the temperature-falling crystallization temperature of the polyamide 6 resin (A)
- the polyamide 6 resin (A) crystals are cooled during the cooling process from the molten state of the polyamide resin composition. Since the crystallization rate is faster than the crystallization rate of the polyamide resin (B), dense and uniform crystals are not formed, and repeated filling and releasing of high-pressure hydrogen are liable to cause defects and deteriorate weld characteristics. To do.
- the temperature decrease crystallization temperature of the polyamide resin (B) is preferably 1 ° C. or higher, more preferably 3 ° C. or higher, more preferably 5 ° C.
- the temperature drop crystallization temperature of the polyamide resin (B) is 5 ° C. or more higher than the temperature drop crystallization temperature of the polyamide 6 resin (A)
- the cooling process from the molten state of the polyamide 6 resin (A) and the polyamide resin (B) In this case, the crystallization of the polyamide resin (B) occurs remarkably faster than the crystallization of the polyamide 6 resin (A), so that the effect as a crystallization accelerator of the polyamide resin (B) is remarkably exhibited.
- uniform crystals are easily formed, and even when high-pressure hydrogen filling and releasing are repeated, defect points are hardly generated and weld characteristics are improved.
- the temperature lowering crystallization temperature of the polyamide resin (B) is preferably the melting point of the polyamide 6 resin (A) + 20 ° C. or less, more preferably the melting point of the polyamide 6 resin (A) + 15 ° C. or less, and the polyamide 6 resin (A).
- the melting point + 10 ° C. or lower is more preferable. If the temperature drop crystallization temperature of the polyamide resin (B) is equal to or lower than the melting point of the polyamide 6 resin (A) + 20 ° C., the melt residence stability of the polyamide 6 resin (A) at the time of producing the polyamide resin composition is maintained.
- the effects of the present invention can be achieved.
- the melting point and the cooling crystallization temperature of the polyamide resin (B) into the above ranges, for example, a method of selecting a polyamide resin having a desired melting point and a cooling crystallization temperature from polyamide resins having different melting points and cooling crystallization temperatures, And a method of adjusting the degree of polymerization and the copolymerization ratio.
- the polyamide resin (B) is not particularly limited as long as it has a melting point and a temperature-falling crystallization temperature satisfying the above conditions.
- the polyamide resin (B) can be obtained mainly from amino acids, lactams or diamines and dicarboxylic acids. it can.
- raw materials include, for example, amino acids such as 6-aminocaproic acid, 11-aminoundecanoic acid, 12-aminododecanoic acid and paraaminomethylbenzoic acid; lactams such as ⁇ -caprolactam and ⁇ -laurolactam; tetramethylenediamine , Pentamethylenediamine, hexamethylenediamine, 2-methylpentamethylenediamine, undecamethylenediamine, dodecamethylenediamine, 2,2,4- / 2,4,4-trimethylhexamethylenediamine, 5-methylnonamethylenediamine, etc.
- amino acids such as 6-aminocaproic acid, 11-aminoundecanoic acid, 12-aminododecanoic acid and paraaminomethylbenzoic acid
- lactams such as ⁇ -caprolactam and ⁇ -laurolactam
- tetramethylenediamine Pentamethylenediamine, hexamethylene
- Aliphatic diamines such as metaxylenediamine and paraxylylenediamine; 1,3-bis (aminomethyl) cyclohexane, 1,4-bis (aminomethyl) cyclohexane, 1-amino-3-aminomethyl- 3,5,5-tri
- methylcyclohexane bis (4-aminocyclohexyl) methane, bis (3-methyl-4-aminocyclohexyl) methane, 2,2-bis (4-aminocyclohexyl) propane, bis (aminopropyl) piperazine, aminoethylpiperazine, etc.
- Alicyclic diamines such as adipic acid, suberic acid, azelaic acid, sebacic acid, dodecanedioic acid; terephthalic acid, isophthalic acid, 2-chloroterephthalic acid, 2-methylterephthalic acid, 5-methylisophthalic acid
- Aromatic dicarboxylic acids such as 5-sodium sulfoisophthalic acid, hexahydroterephthalic acid, hexahydroisophthalic acid; 1,4-cyclohexanedicarboxylic acid, 1,3-cyclohexanedicarboxylic acid, 1,2-cyclohexanedicarboxylic acid, 1, 3-cyclopen Alicyclic dicarboxylic acids such as Njikarubon acid.
- polyamide homopolymers or copolymers derived from these raw materials can be used. Two or more of these polyamide resins may be blended.
- polyamide 610 resin is more preferable because weld characteristics are further improved.
- the degree of polymerization of the polyamide resin (B) is not particularly limited, but the relative viscosity measured at 25 ° C. in a 98% concentrated sulfuric acid solution having a resin concentration of 0.01 g / ml is in the range of 1.5 to 7.0. Preferably there is.
- the relative viscosity is 1.5 or more, the melt viscosity of the polyamide resin composition at the time of molding becomes moderately high, the air entrainment at the time of molding can be suppressed, and the moldability can be further improved.
- the relative viscosity is more preferably 1.8 or more.
- the relative viscosity is 7.0 or less, the melt viscosity of the polyamide resin composition at the time of molding becomes moderately low, and the moldability can be further improved.
- the amount of the amino terminal group of the polyamide resin (B) is not particularly limited, but is preferably in the range of 1.0 to 10.0 ⁇ 10 ⁇ 5 mol / g.
- the amino terminal group amount is in the range of 1.0 to 10.0 ⁇ 10 ⁇ 5 mol / g, a sufficient degree of polymerization can be obtained, and the mechanical strength of the molded product can be improved.
- the amount of amino terminal groups of the polyamide resin (B) was determined by dissolving the polyamide resin (B) in a phenol / ethanol mixed solvent (83.5: 16.5 (volume ratio)), and adding 0.02N hydrochloric acid aqueous solution. It can obtain
- the blending amount of the polyamide resin (B) in the polyamide resin composition of the present invention is 0.01 to 5 parts by weight with respect to 100 parts by weight of the polyamide 6 resin (A).
- the amount of the polyamide resin (B) is preferably 0.05 parts by weight or more, and more preferably 0.1 parts by weight or more.
- the blending amount of the polyamide resin (B) exceeds 5 parts by weight, the phase separation between the polyamide 6 resin (A) and the polyamide resin (B) in the cooling process from the molten state of the resin composition is likely to proceed. The effect of improving the crystallization rate is not sufficient, and defect points are likely to be generated by repeatedly filling and releasing high-pressure hydrogen. In addition, since the dense and uniform crystal is difficult to be formed, the weld characteristics are deteriorated.
- the blending amount of the polyamide resin (B) is preferably 4.5 parts by weight or less, and more preferably 4 parts by weight or less.
- the polyamide resin composition is preferably further blended with an impact resistant material (C).
- an impact resistant material C
- the impact resistance can be improved.
- molded articles used for applications that come into contact with high-pressure hydrogen are repeatedly subjected to temperature changes (heat cycle) from ⁇ 40 ° C. or lower to 90 ° C. or higher due to filling and releasing of high-pressure hydrogen.
- heat cycle temperature changes
- blending an impact-resistant material (C) the crack in the junction part of the resin part and metal part which arises by repetition of such a heat cycle can be suppressed, and heat cycle resistance can be improved.
- Examples of the impact resistant material (C) include olefin resin, acrylic rubber, silicone rubber, fluorine rubber, styrene rubber, nitrile rubber, vinyl rubber, urethane rubber, polyamide elastomer, polyester elastomer, ionomer. Etc. Two or more of these may be blended.
- an olefin resin is preferably used because of its excellent compatibility with the polyamide 6 resin (A) and the polyamide resin (B) and a high effect of improving heat cycle resistance.
- the olefin resin is a thermoplastic resin obtained by polymerizing olefin monomers such as ethylene, propylene, butene, isoprene, and pentene.
- the copolymer of 2 or more types of olefin monomers may be sufficient, and the copolymer of these olefin monomers and another monomer may be sufficient.
- the olefin resin include polymers such as polyethylene, polypropylene, polystyrene, poly 1-butene, poly 1-pentene, and polymethyl pentene or copolymers thereof; ethylene / ⁇ -olefin copolymer, ethylene / ⁇ , ⁇ -unsaturated carboxylic acid ester copolymer, ⁇ -olefin / ⁇ , ⁇ -unsaturated carboxylic acid ester copolymer, [copolymer of (ethylene and / or propylene) and vinyl alcohol ester] Polyolefin obtained by partially hydrolyzing, a copolymer of (ethylene and / or propylene) and (unsaturated carboxylic acid and / or unsaturated carboxylic ester), [(ethylene and / or propylene) and (unsaturated) Copolymer of saturated carboxylic acid and / or unsaturated carboxylic acid ester) Polyolefins obtained by at least a portion
- an ethylene / ⁇ -olefin copolymer and an ethylene / ⁇ , ⁇ -unsaturated carboxylic acid ester copolymer are more preferable, and an ethylene / ⁇ -olefin copolymer is more preferable.
- the polyolefin resin may be modified with an unsaturated carboxylic acid and / or a derivative thereof.
- the derivative of unsaturated carboxylic acid is a compound obtained by substituting the hydroxy group portion of the carboxyl group of unsaturated carboxylic acid with another substituent, and includes a metal salt, an acid halide, an ester, an acid of unsaturated carboxylic acid. Anhydrides, amides and imides.
- Examples of the unsaturated carboxylic acid or derivative thereof include acrylic acid, methacrylic acid, maleic acid, fumaric acid, itaconic acid, crotonic acid, methylmaleic acid, methyl fumaric acid, mesaconic acid, citraconic acid, glutaconic acid and carboxylic acids thereof.
- a method for introducing these unsaturated carboxylic acids or derivatives thereof into the polyolefin-based resin for example, a method of copolymerizing an olefin monomer and an unsaturated carboxylic acid and / or a derivative thereof, using a radical initiator, Examples thereof include a method of grafting an unsaturated carboxylic acid and / or a derivative thereof into an unmodified polyolefin resin.
- the ethylene / ⁇ -olefin copolymer is preferably a copolymer of ethylene and an ⁇ -olefin having 3 to 20 carbon atoms.
- Specific examples of the ⁇ -olefin having 3 to 20 carbon atoms include propylene, 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene, 1-decene and 1-undecene.
- ⁇ -olefins having 3 to 12 carbon atoms are preferable from the viewpoint of improving mechanical strength.
- non-conjugated dienes such as 1,4-hexadiene, dicyclopentadiene, 2,5-norbornadiene, 5-ethylidene norbornene, 5-ethyl-2,5-norbornadiene, 5- (1′-propenyl) -2-norbornene At least one of these may be copolymerized.
- Copolymer of ethylene modified with unsaturated carboxylic acid and / or derivative thereof and ⁇ -olefin having 3 to 12 carbon atoms further improves compatibility with polyamide 6 resin (A) and polyamide resin (B) It is more preferable because the heat cycle resistance can be further improved. Moreover, even if filling and releasing pressure are repeated with higher-pressure hydrogen, generation of defect points can be suppressed.
- the ⁇ -olefin content in the ethylene / ⁇ -olefin copolymer is preferably 1 to 30 mol%, more preferably 2 to 25 mol%, and still more preferably 3 to 20 mol%.
- the structure of the impact-resistant material (C) is not particularly limited.
- a multilayer structure called a so-called core-shell type consisting of at least one layer made of rubber and one or more layers made of a polymer different from the rubber. It may be.
- the number of layers constituting the multilayer structure may be two or more, and may be three or more or four or more, but preferably has one or more rubber layers (core layers) inside.
- the type of rubber constituting the rubber layer of the multilayer structure is not particularly limited.
- acrylic component, silicone component, styrene component, nitrile component, conjugated diene component, urethane component, ethylene component, propylene component, isobutene examples thereof include rubber obtained by polymerizing components.
- the kind of the different polymer constituting the layer other than the rubber layer of the multilayer structure is not particularly limited as long as it is a polymer having thermoplasticity, but there is a polymer having a glass transition temperature higher than that of the rubber layer. preferable.
- the polymer having thermoplasticity for example, an unsaturated carboxylic acid alkyl ester unit, an unsaturated carboxylic acid unit, an unsaturated glycidyl group-containing unit, an unsaturated dicarboxylic acid anhydride unit, an aliphatic vinyl unit, an aromatic vinyl unit, Examples thereof include polymers containing vinyl cyanide units, maleimide units, unsaturated dicarboxylic acid units and other vinyl units.
- the blending amount of the impact resistant material (C) in the polyamide resin composition is preferably 1 to 50 parts by weight with respect to 100 parts by weight of the polyamide 6 resin (A). Heat cycle resistance can be improved more by making the compounding quantity of an impact-resistant material (C) into 1 weight part or more.
- the amount of the impact resistant material (C) is more preferably 5 parts by weight or more, and still more preferably 10 parts by weight or more.
- the crystallization speed can be further improved.
- the amount of the impact resistant material (C) is more preferably 45 parts by weight or less, further preferably 40 parts by weight or less, and further preferably 35 parts by weight or less.
- other components other than the components (A), (B), and (C) may be blended as necessary within a range that does not impair the characteristics.
- other components include fillers, thermoplastic resins other than the components (A) to (C), and various additives.
- the strength and dimensional stability of the obtained molded product can be improved by blending a polyamide resin composition with other fillers as other components.
- the shape of the filler may be fibrous or non-fibrous, or a combination of fibrous filler and non-fibrous filler may be used.
- the fibrous filler include glass fiber, glass milled fiber, carbon fiber, potassium titanate whisker, zinc oxide whisker, aluminum borate whisker, aramid fiber, alumina fiber, silicon carbide fiber, ceramic fiber, asbestos fiber, and stone powder. Examples thereof include fibers and metal fibers.
- Non-fibrous fillers include, for example, silicates such as wollastonite, zeolite, sericite, kaolin, mica, clay, pyrophyllite, bentonite, asbestos, talc, alumina silicate; alumina, silicon oxide, magnesium oxide, oxidation Metal oxides such as zirconium, titanium oxide and iron oxide; metal carbonates such as calcium carbonate, magnesium carbonate and dolomite; metal sulfates such as calcium sulfate and barium sulfate; magnesium hydroxide, calcium hydroxide and aluminum hydroxide Metal hydroxide; glass beads, ceramic beads, boron nitride, silicon carbide and the like. These may be hollow.
- silicates such as wollastonite, zeolite, sericite, kaolin, mica, clay, pyrophyllite, bentonite, asbestos, talc, alumina silicate
- alumina silicon oxide, magnesium oxide, oxidation Metal oxides such as zircon
- these fibrous and / or non-fibrous fillers after pretreatment with a coupling agent in terms of obtaining superior mechanical properties.
- the coupling agent include isocyanate compounds, organic silane compounds, organic titanate compounds, organic borane compounds, and epoxy compounds.
- thermoplastic resins examples include polyester resins, polyphenylene sulfide resins, polyphenylene oxide resins, polycarbonate resins, polylactic acid resins, polyacetal resins, polysulfone resins, tetrafluoropolyethylene resins, polyetherimide resins, polyamideimide resins, and polyimide resins.
- additives include, for example, anti-coloring agents, antioxidants such as hindered phenols and hindered amines, mold release agents such as ethylene bisstearyl amide and higher fatty acid esters, plasticizers, heat stabilizers, lubricants, and UV inhibitors. , Colorants, flame retardants, foaming agents and the like.
- a copper compound to the polyamide resin composition because long-term heat resistance can be improved.
- the copper compound include cuprous chloride, cupric chloride, cuprous bromide, cupric bromide, cuprous iodide, cupric iodide, cupric sulfate, cupric nitrate. , Copper phosphate, cuprous acetate, cupric acetate, cupric salicylate, cupric stearate, cupric benzoate and inorganic copper halides and xylylenediamine, 2-mercaptobenzimidazole, benzimidazole And complex compounds. Two or more of these may be blended.
- the compounding amount of the copper compound is preferably 0.01 parts by weight or more, more preferably 0.015 parts by weight or more with respect to 100 parts by weight of the polyamide 6 resin (A).
- the amount of the copper compound is preferably 2 parts by weight or less, and more preferably 1 part by weight or less, from the viewpoint of suppressing coloration due to liberation of metallic copper during molding.
- alkali halide examples include lithium chloride, lithium bromide, lithium iodide, potassium chloride, potassium bromide, potassium iodide, sodium bromide and sodium iodide. Two or more of these may be blended. Particular preference is given to potassium iodide or sodium iodide.
- Polyamide resin composition is a polyamide in which the rise time of invariant Q of the polyamide resin composition measured under the same conditions when cooled at a rate of 20 ° C./min from a molten state at a temperature of 250 ° C. in light scattering measurement It is preferable that the rise time of the invariant Q of 6 resin (A) is shorter.
- the invariant Q is defined as an integral of the scattering intensity I (s) over the entire inverse space in the light scattering measurement. That is, the invariant Q is a value that represents the total scattering ability of the sample. At the start of the measurement, the resin is melted, but crystals are generated due to a decrease in temperature, and light is scattered.
- the rise time of the invariant Q represents the time from the start of measurement to the start of crystallization of the sample.
- the rise time of invariant Q is used as an indicator of the progress of crystallization (crystallization rate).
- the rise time of the invariant Q of the polyamide resin composition when cooled at a temperature of 250 ° C. to 20 ° C./min is shorter than the rise time of the invariant Q of the polyamide 6 resin (A). It means that the temperature-falling crystallization rate of the polyamide resin composition of the present invention is larger than that of the polyamide 6 resin (A) alone.
- the addition of the polyamide resin (B) to the polyamide 6 resin (A) means that the temperature-falling crystallization rate is increased as compared with the case of the polyamide 6 resin (A) alone. Therefore, the polyamide resin composition of the present invention can suppress the occurrence of defects even when repeated filling and releasing of hydrogen at a higher pressure as compared with the polyamide 6 resin (A). Furthermore, compared with polyamide 6 resin (A), the temperature-falling crystallization speed is higher, so that the crystal nuclei are uniformly formed, and more dense and uniform crystals can be formed, and the weld characteristics are further improved. Can be made.
- the rise time of the invariant Q of the polyamide resin composition and the polyamide 6 resin (A) can be obtained by the following method. First, 8 to 10 mg of a sample is sandwiched between cover glasses and subjected to a hot stage “CSS-450W” manufactured by Linkham Co., and kept at a temperature of 250 ° C. for 30 seconds to melt the sample. Thereafter, the temperature is lowered to 180 ° C. at a rate of 20 ° C./min.
- the rise time of invariant Q is measured when the temperature drop start time is 0.
- the rise time of the invariant Q indicates a point in time when the value of the invariant Q at the start of cooling is 0 and the invariant Q starts to increase.
- FIG. 1 shows a graph of measurement results of invariant Q of the polyamide resin composition obtained in Example 4 described later.
- the horizontal axis represents the elapsed time from the start of temperature decrease, and the vertical axis represents the value of invariant Q.
- FIG. 1B is an enlarged view of FIG. In FIG. 1B, reference numeral 1 represents the rise time of the invariant Q.
- the rise time of invariant Q measured under the above conditions is preferably 170 seconds or less, more preferably 168 seconds or less, and even more preferably 165 seconds or less.
- examples of means for setting the rise time of the invariant Q within the above preferable range include a method of setting the temperature-falling crystallization temperature of the polyamide resin composition to the preferable range described later.
- the average dispersed particle diameter of the polyamide resin (B) in the polyamide 6 resin (A), which is observed with a transmission electron microscope is preferably 500 nm or less, more preferably 400 nm or less, and even more preferably 300 nm or less.
- the average dispersed particle size of the polyamide resin (B) in the polyamide 6 resin (A) is 500 nm or less, the effect as a crystallization accelerator of the polyamide resin (B) is remarkably exhibited, and dense and uniform crystals are formed. In addition to being easily formed, defect points are less likely to occur even when high-pressure hydrogen filling and releasing are repeated, and weld characteristics are also improved.
- the average dispersed particle size of the polyamide resin (B) is, for example, cut out of an ultrathin section using an ultramicrotome from an extruded product or an injection molded product of a polyamide resin composition. It can be dyed with acid ruthenium or the like, observed using an H-7100 transmission electron microscope manufactured by Hitachi, Ltd., and calculated by image analysis. As an image analysis method, the average value of the major axis and minor axis of the polyamide resin (B) present in the electron micrograph is calculated using the image analysis software “Scion Image” manufactured by Scion Corporation, and the major axis and minor axis are calculated. The average dispersed particle size can be calculated as the average value of the sizes.
- the average dispersed particle size of the polyamide resin (B) As a method for setting the average dispersed particle size of the polyamide resin (B) to 500 nm or less, it is preferable to melt-knead at a temperature equal to or higher than the melting points of the polyamide 6 resin (A) and the polyamide resin (B). By kneading in a state where both the polyamide 6 resin (A) and the polyamide resin (B) are melted, the polyamide resin (B) is added to the polyamide 6 resin (A) with an average dispersed particle diameter of 500 nm or less. It can be uniformly dispersed.
- the melt kneading temperature is preferably 230 ° C or higher, more preferably 235 ° C or higher, and most preferably 240 ° C or higher.
- the upper limit of the melt kneading temperature is preferably 300 ° C. or lower, more preferably 290 ° C. or lower, and most preferably 280 ° C. or lower.
- the melting point of the polyamide resin in the polyamide resin composition is preferably not less than the melting point of the polyamide 6 resin (A), more preferably the melting point of the polyamide 6 resin (A) + 1 ° C. or more, and the melting point of the polyamide 6 resin (A). More preferably + 3 ° C. or higher.
- the melting point of the polyamide resin in the polyamide resin composition is a melting point derived from the polyamide resin observed when the melting point of the polyamide resin composition is measured.
- the melting point of the polyamide resin in the polyamide resin composition is equal to or higher than the melting point of the polyamide 6 resin (A) alone, that the polyamide resin (B) is uniformly dispersed in the polyamide 6 resin (A). Means.
- the melting point of the polyamide resin composition is preferably the melting point of the polyamide 6 resin (A) + 20 ° C. or less, more preferably the melting point of the polyamide 6 resin (A) + 15 ° C. or less, and the melting point of the polyamide 6 resin (A) + 10 ° C. or less. Is more preferable. If the melting point of the polyamide resin composition is the melting point of the polyamide 6 resin (A) + 20 ° C. or less, the effects of the present invention can be achieved while maintaining the melt residence stability of the polyamide resin composition when producing the polyamide resin composition. Can play.
- the melting point of the polyamide resin in the polyamide resin composition can be measured in the same manner as the melting points of the polyamide 6 resin (A) and the polyamide resin (B) by DSC measurement.
- DSC-7 differential scanning calorimeter
- two-point calibration indium, lead
- baseline correction baseline correction
- the sample amount was set to 8 to 10 mg, held at a temperature 15 ° C. higher than the temperature showing the maximum value of the melting curve obtained by heating at a heating rate of 20 ° C./min, and then cooled down at 20 ° C./min. After cooling to 30 ° C. at a rate and holding at 30 ° C.
- a second temperature raising step is performed at a rate of 20 ° C./min.
- the melting endothermic peak temperature of the polyamide resin observed in the second temperature raising step is defined as the melting point of the polyamide resin.
- the temperature corresponding to the larger melting endothermic peak is defined as the melting point of the polyamide resin in the polyamide resin composition.
- the temperature lowering crystallization temperature of the polyamide resin composition is preferably 1 ° C. or higher, more preferably 3 ° C. or higher, more preferably 5 ° C. or higher than the temperature lowering crystallization temperature of the polyamide 6 resin (A). preferable. If the temperature drop crystallization temperature of the polyamide resin composition is 1 ° C. or more higher than the temperature drop crystallization temperature of the polyamide 6 resin (A), crystals of the polyamide 6 resin (A) are cooled during the cooling process from the molten state of the polyamide resin composition. When the crystallization speed of the polyamide resin composition is higher than the crystallization speed, dense and uniform crystals are easily formed.
- the temperature drop crystallization temperature of the polyamide resin composition is preferably 180 ° C.
- the temperature drop crystallization temperature of the polyamide resin composition is preferably the melting point of the polyamide 6 resin (A) + 15 ° C. or less, more preferably the melting point of the polyamide 6 resin (A) + 12 ° C. or less, and the melting point of the polyamide 6 resin (A). + 10 ° C. or lower is more preferable. If the temperature drop crystallization temperature of the polyamide resin composition is not higher than the melting point of the polyamide 6 resin (A) + 15 ° C., the present invention maintains the melt residence stability of the polyamide resin composition when producing the polyamide resin composition. The effects of the invention can be achieved.
- the temperature-falling crystallization temperature of the polyamide resin composition can be measured in the same manner as the temperature-falling crystallization temperature of the polyamide 6 resin (A) and the polyamide resin (B) by DSC measurement.
- the sample amount was set to 8 to 10 mg, held at a temperature 15 ° C. higher than the temperature showing the maximum value of the melting curve obtained by heating at a heating rate of 20 ° C./min, and then cooled down at 20 ° C./min.
- the crystallization exothermic peak temperature observed when cooling at a rate of 30 ° C. is defined as the temperature-falling crystallization temperature.
- the temperature corresponding to the larger crystallization exothermic peak is defined as the temperature-falling crystallization temperature of the polyamide resin composition.
- Examples of the means for setting the temperature-falling crystallization temperature of the polyamide resin composition in the above range include a method using the above-mentioned preferred polyamide resin composition.
- thermoplastic polyamide resin composition of this invention There is no restriction
- a kneading apparatus for example, a known kneading apparatus such as a Banbury mixer, a roll, or an extruder can be employed.
- a known kneading apparatus such as a Banbury mixer, a roll, or an extruder can be employed.
- the polyamide resin composition of the present invention is blended with other components such as the impact resistant material (C) and various additives, these can be blended at any stage.
- the impact resistant material (C) and other components are blended simultaneously when the polyamide 6 resin (A) and the polyamide resin (B) are blended.
- a method of blending the impact-resistant material (C) and other components by a method such as side feed during the melt-kneading of the polyamide 6 resin (A) and the polyamide resin (B), or the polyamide 6 resin (A) in advance A method of blending the impact-resistant material (C) and other components after melt-kneading the polyamide resin (B), or blending the impact-resistant material (C) and other components with the polyamide 6 resin (A) in advance.
- mixing are mentioned.
- the polyamide resin composition of the present invention can be molded by any method to obtain a molded product.
- the molding method include extrusion molding, injection molding, hollow molding, calendar molding, compression molding, vacuum molding, foam molding, blow molding, and rotational molding.
- the molded shape include shapes such as a pellet shape, a plate shape, a fiber shape, a strand shape, a film or sheet shape, a pipe shape, a hollow shape, and a box shape.
- the molded article of the present invention is used for a molded article that comes into contact with high-pressure hydrogen, taking advantage of the excellent feature that generation of defects is suppressed even when charging and releasing of high-pressure hydrogen are repeated.
- the molded product that is in contact with high-pressure hydrogen here is a molded product that is in contact with hydrogen at a pressure higher than normal pressure. Since it has the effect of suppressing the generation of defect points when repeated filling and releasing of high-pressure hydrogen, it is preferably used for molded products that come into contact with hydrogen at a pressure of 20 MPa or higher, and used for molded products that come into contact with hydrogen at 30 MPa or higher. Preferably used.
- it is preferably used for molded products that come into contact with hydrogen at a pressure of 200 MPa or less, more preferably used for molded products that come into contact with hydrogen at 150 MPa or less, and more preferably used for molded products that come into contact with hydrogen at 100 MPa or less.
- Examples of molded products that come into contact with high-pressure hydrogen include high-pressure hydrogen on-off valve, high-pressure hydrogen check valve, high-pressure hydrogen pressure-reducing valve, high-pressure hydrogen pressure regulating valve, high-pressure hydrogen seal, high-pressure hydrogen hose, high-pressure hydrogen Tank, high pressure hydrogen tank liner, high pressure hydrogen pipe, high pressure hydrogen packing, high pressure hydrogen pressure sensor, high pressure hydrogen pump, high pressure hydrogen tube, high pressure hydrogen regulator, high pressure hydrogen film, high pressure hydrogen sheet, high pressure Examples include hydrogen fibers and high-pressure hydrogen joints.
- on-off valve for high pressure hydrogen check valve for high pressure hydrogen, pressure reducing valve for high pressure hydrogen, pressure regulating valve for high pressure hydrogen, tank for high pressure hydrogen, tank liner for high pressure hydrogen, packing for high pressure hydrogen, pressure sensor for high pressure hydrogen
- high-pressure hydrogen containers such as a high-pressure hydrogen pump, a high-pressure hydrogen regulator, and a high-pressure hydrogen joint and its peripheral parts.
- it can be particularly preferably used for a high-pressure hydrogen tank.
- a particularly preferred embodiment is an embodiment in which a tank liner made of the polyamide resin composition of the present invention is used as a resin liner for a high-pressure hydrogen tank in which the outside of the resin liner is reinforced with carbon fiber reinforced resin. That is, the high pressure hydrogen tank of the present invention is a high pressure hydrogen tank in which a carbon fiber reinforced resin (CFRP) reinforcing layer is laminated on the surface layer of a tank liner made of the polyamide resin composition of the present invention.
- CFRP carbon fiber reinforced resin
- CFRP reinforcing layer is laminated on the surface layer of the tank liner because strength and elastic modulus that can withstand high pressure can be expressed.
- the CFRP reinforcing layer is composed of carbon fibers and a matrix resin.
- the carbon fiber preferably has a tensile elastic modulus of 50 to 700 GPa from the viewpoint of bending properties and strength, and more preferably 200 to 700 GPa in view of the specific rigidity, which is more cost effective. Considering the viewpoint, the one of 200 to 450 GPa is most preferable.
- the tensile strength of the carbon fiber alone is preferably 1500 to 7000 MPa, and preferably 3000 to 7000 MPa from the viewpoint of specific strength.
- the density of the carbon fiber is preferably 1.60 to 3.00, more preferably 1.70 to 2.00 from the viewpoint of weight reduction, and most preferably 1.70 to 1.90 from the viewpoint of cost performance.
- the fiber diameter of the carbon fiber is preferably 5 to 30 ⁇ m, more preferably 5 to 20 ⁇ m from the viewpoint of handleability, and most preferably 5 to 10 ⁇ m from the viewpoint of weight reduction.
- Carbon fibers may be used alone or in combination with reinforcing fibers other than carbon fibers. Examples of reinforcing fibers other than carbon fibers include glass fibers and aramid fibers.
- Vf is preferably 20 to 90% from the viewpoint of rigidity, and from the viewpoint of productivity and required rigidity. Vf is preferably 40 to 80%.
- the matrix resin constituting the CFRP reinforcing layer may be a thermosetting resin or a thermoplastic resin.
- the matrix resin is a thermosetting resin
- examples of the main material include an epoxy resin, an unsaturated polyester resin, a vinyl ester resin, a phenol resin, a polyurethane resin, and a silicone resin. Only one of these may be used, or two or more may be mixed and used. Epoxy resins are particularly preferred. Examples of the epoxy resin include bisphenol A type epoxy resin, bisphenol F type epoxy resin, bisphenol S type epoxy resin, phenol novolac type epoxy resin, isocyanate modified bisphenol A type epoxy resin and the like. When a thermosetting resin is employed for the matrix resin, it is possible to add an appropriate curing agent or reaction accelerator to the thermosetting resin component.
- the matrix resin is a thermoplastic resin
- the main materials are polyethylene resin, polypropylene resin, polyvinyl chloride resin, ABS resin, polystyrene resin, AS resin, polyamide resin, polyacetal resin, polycarbonate resin, thermoplastic polyester resin, PPS resin Fluorine resin, polyetherimide resin, polyetherketone resin, polyimide resin and the like.
- thermoplastic resins may be used alone, as a mixture of two or more kinds, or as a copolymer. In the case of a mixture, a compatibilizer may be used in combination.
- brominated flame retardants, silicon-based flame retardants, red phosphorus, and the like may be added as flame retardants.
- FW filament winding
- TW tape winding
- SW sheet winding
- RTM hand layup method
- FW method, SW method and TW method are basically the same molding method from the viewpoint of applying a matrix resin to a strand-like carbon fiber and laminating it on the liner.
- the name is different depending on whether it is wound in a filament (thread) form, a tape (tape form in which yarns are bundled to some extent) form, or a sheet (sheet form in which tapes are bundled to some extent).
- a filament thread
- tape tape form in which yarns are bundled to some extent
- sheet sheet form in which tapes are bundled to some extent
- the matrix resin is a thermosetting resin
- after wrapping carbon fiber and uncured matrix resin around the liner it is necessary to perform resin curing treatment under conditions suitable for the resin used in a batch furnace (oven) or continuous curing furnace in order to cure the resin. There is.
- the matrix resin is a thermoplastic resin
- the fiber orientation design of carbon fibers When obtaining the high-pressure hydrogen tank of the present invention by the FW method, TW method, SW method, etc., the most important thing is the fiber orientation design of carbon fibers.
- a carbon fiber strand continuous fiber
- a prepreg in which a carbon fiber strand is impregnated with a resin is wound around a liner and molded.
- a valve is inserted into a tank liner by insert molding. It is preferable to integrate the valve with the tank liner by insert molding since the airtightness of the high-pressure hydrogen is increased.
- the valve functions as a high-pressure hydrogen filling port and a discharge port.
- the material of the metal part used as the valve include carbon steel, manganese steel, chrome molybdenum steel, stainless steel, and aluminum alloy.
- carbon steel include carbon steel pipe for pressure piping, carbon steel pipe for high pressure piping, steel pipe for low temperature piping, and carbon steel for machine structure.
- Examples of manganese steel include seamless steel pipes for high-pressure gas containers, manganese steel materials for machine structures, and manganese chromium steel materials.
- Examples of chrome molybdenum steel and low alloy steel include seamless steel pipes for high-pressure gas containers, alloy steel pipes for machine structures, nickel chrome molybdenum steel materials, and chrome molybdenum steel materials.
- Examples of stainless steel include stainless steel forgings for pressure, stainless steel pipes for piping, stainless steel bars, hot rolled stainless steel plates and steel strips, cold rolled stainless steel plates and steel strips.
- Examples of the aluminum alloy include aluminum and aluminum alloy plates, strips, bars, wires, seamless pipes, and forged products.
- annealing normalizing, for manganese steel, normalizing, quenching and tempering, for chromium molybdenum steel and low alloy steel, quenching and tempering, stainless steel
- a material subjected to hardening and tempering may be applied to the aluminum alloy.
- a solution subjected to solution treatment and T6 aging treatment may be applied.
- the most preferred embodiment of the high-pressure hydrogen tank of the present invention is a high-pressure tank in which a CFRP reinforcing layer is laminated on the surface layer of a tank liner comprising the polyamide resin composition of the present invention, and a valve is inserted into the tank liner. It is a tank for hydrogen.
- test piece was subjected to X-ray CT analysis using “TDM1000-IS” manufactured by Yamato Scientific Co., Ltd., and the presence or absence of a defect point was observed.
- hydrogen gas was injected into the autoclave to a pressure of 30 MPa over 3 minutes, held for 2 hours, and then reduced to normal pressure over 1 minute. This was repeated for 700 cycles as one cycle.
- the test piece after 700 cycles was subjected to X-ray CT analysis using “TDM1000-IS” manufactured by Yamato Scientific Co., Ltd., and the presence or absence of defects of 10 ⁇ m or more was observed.
- a second temperature raising step was performed at a rate of 20 ° C./min.
- the observed melting endothermic peak temperature was taken as the melting point.
- the temperature-falling crystallization temperature and the melting point were measured in the same manner.
- the three obtained metal / resin composite molded products were allowed to stand at a temperature of ⁇ 60 ° C. for 1 hour, and then left at 90 ° C. for 1 hour, and the composite molded product was visually observed to determine the presence or absence of cracks. This operation was repeated, and the number of cycles in which all three composite molded products were broken was 500 or more, A was 200 to 499, B was 199, and C was 199.
- the five weld dumbbell molded pieces obtained were subjected to a tensile test at a speed of 10 mm / min, and the number of base material fractured, that is, the number of fractured parts other than the weld was counted. It means that the more the number of broken base metals, the better the weld tensile properties.
- the crystallization accelerator means a polyamide resin (B).
- PA66 is used in Comparative Example 2.
- an organic nucleating agent is used in Comparative Examples 3 and 4, an organic nucleating agent is used in Comparative Examples 5, 6, and 12, an inorganic nucleating agent is used in Comparative Examples 7, 8, and 10, it is PA610, in Comparative Example 9 is a PA6 / 66 copolymer, and in Comparative Example 11 is PA46.
- PA6 Polyamide 6 resin (melting point 223 ° C., temperature drop crystallization temperature 175 ° C., relative viscosity 2.70 at 25 ° C. in 98% concentrated sulfuric acid solution having a resin concentration of 0.01 g / ml, rise time of invariant Q 175 seconds)
- PA66 polyamide 66 resin (melting point: 263 ° C., temperature drop crystallization temperature: 225 ° C., relative viscosity of 2.70 at 25 ° C.
- PA 610 polyamide 610 resin (melting point 226 ° C., temperature drop crystallization temperature 187 ° C., relative viscosity 3.50 at 25 ° C. in 98% concentrated sulfuric acid solution having a resin concentration of 0.01 g / ml)
- PA46 Polyamide 46 resin (melting point 290 ° C., temperature drop crystallization temperature 257 ° C., relative viscosity 3.25 at 25 ° C.
- PA6 / PA410 copolymer Polyamide 6 / Polyamide 410 copolymer (melting point 232 ° C., temperature drop crystallization temperature: 194 ° C., relative viscosity 3.50 at 25 ° C. in 98% concentrated sulfuric acid solution having a resin concentration of 0.01 g / ml) )
- PA6 / PA66 copolymer Polyamide 6 / polyamide 66 copolymer (melting point 190 ° C., crystallization temperature drop: 122 ° C., relative viscosity 4.20 at 25 ° C.
- Organic nucleating agent N, N ', N "-tris (2-methylcyclohexane-1-yl) propane-1-3-3 triylcarboxamide""Licclear” (registered trademark) PC-1 "(Shin Nippon Rika ( Manufactured by)
- Inorganic nucleating agent 1 Talc “MicroAce” (registered trademark) P-6 ”(manufactured by Nippon Talc Co., Ltd., median diameter (D50) 4.0 ⁇ m)
- Inorganic nucleating agent 2 Microtalc “NanoAce” (registered trademark) D-600 ”(manufactured by Nippon Talc Co., Ltd., median diameter (D50) 0.5 ⁇ m)
- Impact-resistant material 1 Maleic anhydride-modified ethylene / 1-butene copolymer “Toughmer (registered trademark)
- the gut discharged from the die at a rate of 20 kg / h was rapidly cooled by passing through a cooling bath filled with water adjusted to 10 ° C. over 10 seconds, and then pelletized with a strand cutter to obtain pellets. .
- the obtained pellets were vacuum-dried with a vacuum dryer at a temperature of 80 ° C. for 12 hours, and the results of evaluation using the pellets after drying were described in Tables 1 and 2. Moreover, the rise time measurement result of invariant Q in the light scattering measurement of Example 4 is shown in FIG.
- the polyamide resin composition obtained by blending the polyamide 6 resin (A) and the polyamide resin (B) has a high crystallization speed, and the molded product obtained by molding the polyamide resin composition is: It has been found that the occurrence of defect points is suppressed even when the filling and releasing of high-pressure hydrogen are repeated, and that the weld characteristics are excellent.
- the polyamide resin composition of the present invention has a high crystallization rate, suppresses the generation of defect points even after repeated filling and releasing of high-pressure hydrogen, and molding with excellent weld characteristics, which are important mechanical characteristics of injection molded products. Goods can be obtained. Molded articles formed by molding the polyamide resin composition of the present invention can be widely used for molded articles that come into contact with high-pressure hydrogen utilizing these characteristics.
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Abstract
Description
各実施例および比較例により得られたペレットから、住友重機械工業(株)製射出成形機「SU75DUZ-C250」を用いて、シリンダー温度:240℃、金型温度:80℃、射出速度10mm/秒、保圧15MPa、保圧時間15秒、冷却時間15秒の成形条件で、直径29mm、高さ12.6mmの円柱状試験片を射出成形した。
各実施例および比較例により得られたペレットについて、示差走査熱量計(パーキンエルマー社製DSC-7)を用い、2点校正(インジウム、鉛)、ベースライン補正を行った後、サンプル量を8~10mgとして、昇温速度20℃/分の条件で昇温して得られる融解曲線の最大値を示す温度より15℃高い温度で1分間保持した後、降温速度20℃/分の条件で30℃まで冷却した。この冷却工程において観測された結晶化発熱ピーク温度を降温結晶化温度とした。さらに、30℃で1分間保持した後、20℃/分の速度で2回目の昇温工程を行った。この2回目の昇温工程において、観測された融解吸熱ピーク温度を融点とした。また、各実施例および比較例において配合したポリアミド6樹脂(A)およびポリアミド樹脂(B)についても、同様にして降温結晶化温度および融点を測定した。
各実施例および比較例により得られたペレットについて、8~10mgをカバーガラスに挟み、リンカム社製ホットステージ「CSS-450W」に供し、温度250℃で30秒保持し、サンプルを溶融させた。その後、20℃/分の速度で、180℃まで降温させた。その際、大塚電子株式会社製高分子フィルムダイナミックス解析装置「DYNA-3000」を使用し、モード:1次元スキャン(1×512)、X方向:中央部4素子分を積算し1データとしてカウント、NDフィルター:5%、測定間隔:1秒、露光時間:500ミリ秒、ゴニオ角度:20度の条件で、降温開始時点を0とした時の、インバリアントQの立ち上がり時間を計測した。
各実施例および比較例により得られたペレットを、日精樹脂工業(株)製射出成形機「NEX1000」を用いて、シリンダー温度:240℃、金型温度:80℃、射出速度100mm/秒、冷却時間20秒の成形条件で、47mm×47mm×27mmの金属コアに厚み1.5mmでオーバーモールドした。
各実施例および比較例により得られたペレットから、住友重機械工業(株)製射出成形機「SE75DUZ-C250」を用いて、シリンダー温度:240℃、金型温度:80℃、射出速度:40mm/秒、保圧:20MPa、冷却時間:20秒の成形条件で、ダブルゲートのASTM1号ウエルドダンベル成形片(165mm×19mm×3.2mm)を射出成形した。
各実施例および比較例により得られたペレットから、ウルトラミクロトームを用いて超薄切片を切り出し、その超薄切片について、リンタングステン酸での染色を行った後、日立製作所社製H-7100型透過型電子顕微鏡を用いて、3万5千倍に拡大して観察を行った。結晶化促進剤の平均分散粒子径については画像解析にて算出した。画像解析の方法としては、Scion Corporation社製画像解析ソフト「Scion Image」を使用して、電子顕微鏡写真中に存在する結晶化促進剤の長径および短径の平均値を算出し、長径と短径の平均値として平均分散粒子径を算出した。なお、結晶化促進剤とは、実施例では、ポリアミド樹脂(B)を意味し、比較例2ではPA66、比較例3、4では有機核剤、比較例5、6、12では無機核剤、比較例7、8、10ではPA610、比較例9ではPA6/66共重合体、比較例11ではPA46を意味する。
PA6:ポリアミド6樹脂(融点223℃、降温結晶化温度175℃、樹脂濃度0.01g/mlの98%濃硫酸溶液中25℃における相対粘度2.70、インバリアントQの立ち上がり時間175秒)
PA66:ポリアミド66樹脂(融点263℃、降温結晶化温度225℃、樹脂濃度0.01g/mlの98%濃硫酸溶液中25℃における相対粘度2.70)
PA610:ポリアミド610樹脂(融点226℃、降温結晶化温度187℃、樹脂濃度0.01g/mlの98%濃硫酸溶液中25℃における相対粘度3.50)
PA46:ポリアミド46樹脂(融点290℃、降温結晶化温度257℃、樹脂濃度0.01g/mlの98%濃硫酸溶液中25℃における相対粘度3.20)
PA6/PA410共重合体:ポリアミド6/ポリアミド410共重合体(融点232℃、降温結晶化温度:194℃、樹脂濃度0.01g/mlの98%濃硫酸溶液中25℃における相対粘度3.50)
PA6/PA66共重合体:ポリアミド6/ポリアミド66共重合体(融点190℃、降温結晶化温度:122℃、樹脂濃度0.01g/mlの98%濃硫酸溶液中25℃における相対粘度4.20)
有機核剤:N,N’,N”-トリス(2-メチルシクロヘキサン-1-イル)プロパン-1-2-3トリイルカルボキサミド「“リカクリア”(登録商標)PC-1」(新日本理化(株)製)
無機核剤1:タルク「“MicroAce”(登録商標)P-6」(日本タルク(株)製、メジアン径(D50)4.0μm)
無機核剤2:マイクロタルク「“NanoAce”(登録商標)D-600」(日本タルク(株)製、メジアン径(D50)0.5μm)
耐衝撃材1:無水マレイン酸変性エチレン/1-ブテン共重合体「“タフマー”(登録商標)MH7020」(三井化学(株)製)
耐衝撃材2:グリシジルメタクリレート変性ポリエチレン共重合体「“ボンドファースト”(登録商標)7L」(住友化学(株)製)
耐衝撃材3:アイオノマー「“ハイミラン”(登録商標)1706」(デュポン(株)製)。
表1および表2記載の各原料を、シリンダー温度を240℃に設定し、ニーディングゾーンを1つ設けたスクリューアレンジとし、スクリュー回転数を150rpmとした2軸スクリュー押出機(JSW社製TEX30α-35BW-7V)(L/D=45(なお、ここでのLは原料供給口から吐出口までの長さである))に供給して溶融混練した。20kg/hの速度でダイから吐出されたガットを、10℃に温調した水を満たした冷却バス中を10秒間かけて通過させることにより急冷した後、ストランドカッターでペレタイズし、ペレットを得た。得られたペレットを、真空乾燥機で、温度80℃、12時間真空乾燥し、乾燥後ペレットを用いて、前述の方法により評価した結果を表1および表2に記載した。また、実施例4の光散乱測定におけるインバリアントQの立ち上がり時間測定結果を図1に示した。
Claims (10)
- ポリアミド6樹脂(A)、および、DSC測定による融点がポリアミド6樹脂(A)の融点+20℃以下であり、かつDSC測定による降温結晶化温度がポリアミド6樹脂(A)の降温結晶化温度より高いポリアミド樹脂(B)を配合してなるポリアミド樹脂組成物であって、かつ、ポリアミド6樹脂(A)100重量部に対して、ポリアミド樹脂(B)を0.01~5重量部配合してなる、高圧水素に触れる成形品用のポリアミド樹脂組成物。
- ポリアミド樹脂(B)が、ポリアミド610樹脂である、請求項1記載のポリアミド樹脂組成物。
- さらに、ポリアミド6樹脂(A)100重量部に対して、耐衝撃材(C)を1~50重量部配合してなる、請求項1~2いずれか記載のポリアミド樹脂組成物。
- 前記耐衝撃材(C)が、不飽和カルボン酸および/またはその誘導体で変性されたエチレン/α-オレフィン共重合体を含む、請求項3記載のポリアミド樹脂組成物。
- 光散乱測定において、温度250℃から20℃/分の速度で冷却して測定した際の、ポリアミド樹脂組成物のインバリアントQの立ち上がり時間が、ポリアミド6樹脂(A)のインバリアントQの立ち上がり時間よりも短い、請求項1~4いずれか記載のポリアミド樹脂組成物。
- 透過型電子顕微鏡により観察される、ポリアミド6樹脂(A)中におけるポリアミド樹脂(B)の平均分散粒子径が500nm以下である、請求項1~5いずれか記載のポリアミド樹脂組成物。
- 請求項1~6のいずれか記載のポリアミド樹脂組成物を成形してなる、高圧水素に触れる成形品。
- 請求項1~6のいずれか記載のポリアミド樹脂組成物からなる、高圧水素用タンクライナー。
- 請求項1~6のいずれか記載のポリアミド樹脂組成物からなるタンクライナーの表層に、炭素繊維強化樹脂補強層が積層されてなる、高圧水素用タンク。
- タンクライナーにバルブがインサートされてなる、請求項9記載の高圧水素用タンク。
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US15/302,635 US9850380B2 (en) | 2015-02-27 | 2015-10-26 | Polyamide resin composition for molded article exposed to high-pressure hydrogen and molded article made of the same |
CN201580022468.3A CN106255726B (zh) | 2015-02-27 | 2015-10-26 | 与高压氢接触的成型品用的聚酰胺树脂组合物及使用其的成型品 |
JP2015553695A JP5935956B1 (ja) | 2015-02-27 | 2015-10-26 | 高圧水素に触れる成形品用のポリアミド樹脂組成物およびそれを用いた成形品 |
KR1020167028836A KR102292160B1 (ko) | 2015-02-27 | 2015-10-26 | 고압 수소에 접하는 성형품용 폴리아미드 수지 조성물 및 그것을 이용한 성형품 |
EP15883315.2A EP3112421B1 (en) | 2015-02-27 | 2015-10-26 | Polyamide resin composition for molded article to be in contact with high-pressure hydrogen, and molded article obtained therefrom |
CA2953089A CA2953089C (en) | 2015-02-27 | 2015-10-26 | Polyamide resin composition for molded article exposed to high-pressure hydrogen and molded article made of the same |
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EP (1) | EP3112421B1 (ja) |
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US20170029620A1 (en) | 2017-02-02 |
EP3112421A1 (en) | 2017-01-04 |
KR20170122641A (ko) | 2017-11-06 |
US9850380B2 (en) | 2017-12-26 |
CN106255726B (zh) | 2019-02-19 |
EP3112421A4 (en) | 2017-03-29 |
EP3112421B1 (en) | 2024-06-12 |
CN106255726A (zh) | 2016-12-21 |
KR102292160B1 (ko) | 2021-08-24 |
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