WO2015033734A1 - 発泡ウレタン組成物及びバンプクッション - Google Patents
発泡ウレタン組成物及びバンプクッション Download PDFInfo
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- WO2015033734A1 WO2015033734A1 PCT/JP2014/070846 JP2014070846W WO2015033734A1 WO 2015033734 A1 WO2015033734 A1 WO 2015033734A1 JP 2014070846 W JP2014070846 W JP 2014070846W WO 2015033734 A1 WO2015033734 A1 WO 2015033734A1
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- foam composition
- urethane foam
- urethane
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4266—Polycondensates having carboxylic or carbonic ester groups in the main chain prepared from hydroxycarboxylic acids and/or lactones
- C08G18/4269—Lactones
- C08G18/4277—Caprolactone and/or substituted caprolactone
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
- C08G18/12—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step using two or more compounds having active hydrogen in the first polymerisation step
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3203—Polyhydroxy compounds
- C08G18/3206—Polyhydroxy compounds aliphatic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4202—Two or more polyesters of different physical or chemical nature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/58—Stroke limiting stops, e.g. arranged on the piston rod outside the cylinder
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2101/00—Manufacture of cellular products
Definitions
- the present invention relates to a urethane foam composition that can be suitably used for a bump cushion.
- Bump cushion is a member that is mounted on a cylinder in a shock absorber of an automobile, and is intended to absorb shock and vibration from the road surface.
- the bump cushion is made of urethane foam or rubber, but it is foamed from the viewpoint of mechanical strength, dynamic characteristics under repeated load (compression), especially fatigue failure, and repeated compression durability. Many products made of urethane are used.
- a foamed urethane composition containing a main component containing a reaction product of the polyester polyol and the diisocyanate and a curing agent containing 1,4-butanediol and water is known. (For example, see Patent Document 1).
- the urethane foam composition gives a molded product having repeated compression durability at a practically usable level, the market is demanding further improvement of repeated compression durability.
- the problem to be solved by the present invention is to provide a urethane foam composition that is excellent in repeated compression durability and that can yield a molded product with little settling.
- the present invention is obtained by reacting a polyol (a1) having a number average molecular weight in the range of 800 to 3,000, a polyisocyanate (a2), and a glycol (a3) having a branched structure having a number average molecular weight in the range of 80 to 300.
- a foam characterized by comprising a main agent (i) containing a urethane prepolymer (A) having an isocyanate group and a curing agent (ii) containing a compound (B) having active hydrogen atoms and water (C).
- a urethane composition and a bump cushion obtained by using the urethane composition are provided.
- the urethane foam composition of the present invention has a long working life, excellent workability, and excellent repeated compression durability, and can yield a molded product with little settling. Therefore, the foamed urethane composition of the present invention is a material that can be used in various fields such as optical members, automobile members, civil engineering and building members, and can be particularly suitably used for bump cushion applications.
- the urethane foam composition of the present invention comprises a polyol (a1) having a number average molecular weight in the range of 800 to 3,000, a polyisocyanate (a2), and a glycol (a3) having a branched structure having a number average molecular weight in the range of 80 to 300.
- polyol (a1) examples include polyester polyol, polycaprolactone polyol, polyether polyol, polyol obtained by addition polymerization of lactone to polytetramethylene glycol, polycarbonate polyol, polybutadiene polyol, hydrogenated polybutadiene polyol, polyacryl polyol, and dimer diol. Hydrogenated dimer diol and the like can be used.
- These polyols may be used alone or in combination of two or more. Among these, it is more preferable to use a polyester polyol because the repeated compression durability can be further improved.
- polyester polyol for example, an aliphatic polyester polyol obtained by esterifying a low molecular weight polyol and a polycarboxylic acid can be used.
- low molecular weight polyol examples include ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, 1,2-propanediol, 1,3-propanediol, dipropylene glycol, tripropylene glycol, and 1,2-butanediol.
- polycarboxylic acid examples include succinic acid, adipic acid, suberic acid, azelaic acid, sebacic acid, dodecanedicarboxylic acid, dimer acid aliphatic polycarboxylic acid; 1,4-cyclohexanedicarboxylic acid, cyclohexanetricarboxylic acid and the like.
- Alicyclic polycarboxylic acid orthophthalic acid, isophthalic acid, terephthalic acid, 1,4-naphthalenedicarboxylic acid, 2,3-naphthalenedicarboxylic acid, 2,6-naphthalenedicarboxylic acid, biphenyldicarboxylic acid, trimellitic acid, pyromellitic Aromatic polycarboxylic acids such as acids; and anhydrides or ester derivatives thereof can be used. These polycarboxylic acids may be used alone or in combination of two or more.
- polyether polyol for example, polypropylene glycol, polytetramethylene glycol, polybutylene glycol and the like can be used. These polyether polyols may be used alone or in combination of two or more.
- polycaprolactone polyol examples include those obtained by reacting the polyether polyol and / or the low molecular weight polyol with a lactone compound.
- lactone compound examples include ⁇ -valerolactone, ⁇ -methyl- ⁇ -valerolactone, ⁇ -caprolactone, ⁇ -methyl- ⁇ -caprolactone, ⁇ -methyl- ⁇ -caprolactone, ⁇ -methyl- ⁇ -caprolactone, ⁇ , ⁇ -dimethyl- ⁇ -caprolactone, 3,3,5-trimethyl- ⁇ -caprolactone, enanthlactone (7-heptanolide), dodecanolactone (12-dodecanolide) and the like can be used. These compounds may be used alone or in combination of two or more.
- the polyol obtained by addition polymerization of lactone to polytetramethylene glycol is a lactone such as ⁇ -caprolactone, ⁇ -butyrolactone, valerolactone, etc.
- the addition rate is preferably 5 to 50% by mass addition polymerization, more preferably 10 to 40% by mass addition polymerization.
- the number average molecular weight of the polyol (a1) is in the range of 80 to 3,000, more preferably in the range of 1,000 to 2,500, from the viewpoint of repeated compression durability.
- the number average molecular weight of the said polyol (a1) shows the value measured on condition of the following by gel permeation chromatography (GPC) method.
- Measuring device High-speed GPC device (“HLC-8220GPC” manufactured by Tosoh Corporation) Column: The following columns manufactured by Tosoh Corporation were connected in series. "TSKgel G5000" (7.8 mm ID x 30 cm) x 1 "TSKgel G4000” (7.8 mm ID x 30 cm) x 1 "TSKgel G3000” (7.8 mm ID x 30 cm) x 1 “TSKgel G2000” (7.8 mm ID ⁇ 30 cm) ⁇ 1 detector: RI (differential refractometer) Column temperature: 40 ° C Eluent: Tetrahydrofuran (THF) Flow rate: 1.0 mL / min Injection amount: 100 ⁇ L (tetrahydrofuran solution with a sample concentration of 0.4 mass%) Standard sample: A calibration curve was prepared using the following standard polystyrene.
- polyisocyanate (a2) one having two or more isocyanate groups in one molecule can be used.
- diphenylmethane diisocyanate (4,4′-form, 2,4′-form, or 2,2 ′ -Bodies or mixtures thereof), carbodiimide-modified products of diphenylmethane diisocyanate, nurate-modified products, burette-modified products, urethane imine-modified products, polyol modified with polyols having a number average molecular weight of 1,000 or less, such as diethylene glycol and dipropylene glycol.
- aromatic polyisocyanates such as isocyanates
- cycloaliphatic polyisocyanates such as isophorone diisocyanate, hydrogenated diphenylmethane diisocyanate, hydrogenated xylylene diisocyanate and norbornene diisocyanate
- aliphatic polyisocyanates such as hexamethylene diisocyanate and dimer acid diisocyanate it can.
- polyisocyanates may be used alone or in combination of two or more.
- aromatic polyisocyanate is preferably used, and 4,4′-diphenylmethane diisocyanate is more preferably used from the viewpoint that repeated compression durability can be further improved.
- the glycol (a3) must have a number average molecular weight in the range of 80 to 300 and have a branched structure.
- a glycol having no branched structure is used as the glycol (a3), sufficient repeated compression durability cannot be imparted, and 4,4′-diphenylmethane diisocyanate is particularly used among the polyisocyanates (a2).
- the said branched structure means having a carbon atom chain branched from the carbon atom chain which connects two hydroxyl groups.
- the number average molecular weight of the said glycol (a3) shows the value obtained by measuring similarly to the number average molecular weight of the said polyol (a1).
- glycol (a3) examples include 2-methyl-1,5-pentanediol, 3-methyl-1,5-pentanediol, 1,2-butanediol, 1,3-butanediol, 2-butyl- 2-ethyl-1,3-propanediol, 1,2-propanediol, 2-methyl-1,3-propanediol, neopentyl glycol, 2-isopropyl-1,4-butanediol, 2,4-dimethyl- 1,5-pentanediol 2,4-diethyl-1,5-pentanediol, 2-ethyl-1,3-hexanediol, 2-ethyl-1,6-hexanediol, 3,5-heptanediol, 2- Methyl-1,8-octanediol and the like can be used.
- glycols may be used alone or in combination of two or more.
- 2-methyl-1,5-pentanediol, 3-methyl-1,5-pentanediol, 1,2-butanediol, 1,3-butane can be further improved in repeated compression durability.
- the glycol (a3) is used in an amount of 0.1 to 4.5 in the total of the polyol (a1), the polyisocyanate (a2) and the glycol (a3) from the viewpoint that the repeated compression durability can be further improved.
- the range is preferably in the range of mass%, more preferably in the range of 0.7 to 2.7 mass%.
- the reaction of the polyol (a1), the polyisocyanate (a2), and the glycol (a3) is repeated from the viewpoint of repeated compression durability, and the total of hydroxyl groups of the polyol (a1) and the glycol (a3)
- the molar ratio of isocyanate to isocyanate groups (NCO / OH) is preferably in the range of 1.5 to 30, more preferably in the range of 2 to 20, and in the range of 4 to 15. Further preferred.
- the urethane prepolymer (A) obtained by the above method has an isocyanate group, and the isocyanate group equivalent (NCO equivalent) is 150 to 1,000 g / eq. In the range of 200 to 500 g / eq. The range of is more preferable.
- the compound (B) having an active hydrogen atom has a group having an active hydrogen atom ([NH] group and / or [OH] group), and specifically, the same as the polyol (a1).
- polyester polyols at least one selected from the group consisting of polyester polyols, polyether polyols and polycaprolactone polyols from the viewpoint that compatibility with the urethane prepolymer (A) is good and repeated compression durability can be further improved.
- polyester polyols are preferably used, and polyester polyols and polycaprolactone polyols are more preferably used.
- the low molecular glycol it is preferable to use ethylene glycol or 1,4-butanediol.
- the mass ratio of the both (polyester polyol / polycaprolactone polyol) is 30/70 to 30% because the repeated compression durability can be further improved.
- the range is preferably 99/1, more preferably 40/60 to 98/2.
- the water (C) functions as a foaming agent, and can be used without any problem as long as it is water that is free from dirt and turbidity, tap water, and the like. Specifically, it is preferable to use ion-exchanged water and / or distilled water as the water (C).
- the amount of the water (C) is preferably in the range of 0.01 to 10 parts by mass with respect to 100 parts by mass of the compound (B) from the viewpoint of the foamed state and density of the molded product. More preferably, it is in the range of 3 to 5 parts by mass.
- the foamed urethane composition of the present invention comprises a main component (i) containing the urethane prepolymer (A) and a curing agent (ii) containing the compound (B) and water (C) as essential components. However, you may contain another additive as needed.
- the other additives include catalysts (D), foam stabilizers (E), abrasive grains, fillers, pigments, thickeners, hydrolysis inhibitors, antioxidants, ultraviolet absorbers, and surfactants.
- a flame retardant, a plasticizer, or the like can be used.
- These additives may be contained alone or in the main agent (i) and the curing agent (ii) as long as the effects of the present invention are not impaired.
- Examples of the catalyst (D) include triethylenediamine, N, N, N ′, N′-tetramethylhexanediamine, N, N, N ′, N′-tetramethylpropanediamine, N, N, N ′, N ′′, N ′′ -pentamethyldiethylenetriamine, N, N ′, N′-trimethylaminoethylpiperazine, N, N-dimethylcyclohexylamine, N, N, N ′, N′-tetramethylethylenediamine, bis (3 -Dimethylaminopropyl) -N, N-dimethylpropanediamine, N, N-dicyclohexylmethylamine, bis (dimethylaminoethyl) ether, N, N ′, N ′′ -tris (3-dimethylaminopropyl) hexahydro-S -Triazine, N, N-dimethylbenzylamine, N, N-d
- the blending amount of the catalyst (D) is preferably in the range of 0.01 to 1 part by weight, and in the range of 0.05 to 0.5 part by weight with respect to 100 parts by weight of the compound (B). More preferably.
- the foam stabilizer (E) stably forms fine bubbles in a molded product, and a silicone surfactant can be preferably used.
- foam stabilizer (E) examples include “SZ-1919”, “SH-192”, “SH-190”, “SZ-580”, “SRX-280A”, “SZ-1959”, “SZ -1328E “,” SF-2937F “,” SF-2938F “,” SZ-1671 “,” SH-193 ",” SZ-1923 “,” Silicon Y-7006 “(Toray Dow Corning Silicone Co., Ltd.) Etc.) can be obtained as a commercial product.
- the blending amount of the foam stabilizer (E) is preferably in the range of 0.01 to 5 parts by mass, and in the range of 0.03 to 3 parts by mass with respect to 100 parts by mass of the polyol (B). More preferably.
- Examples of the method for producing the bump cushion include a method using a mixed casting machine.
- the main agent (i) and the curing agent (ii) are put into respective tanks of a mixed casting machine, and the main agent (i) is heated preferably in the range of 40 to 80 ° C.
- the curing agent (ii) is preferably heated in the range of 40 to 80 ° C., and each is mixed with a mixing caster to obtain a urethane foam composition.
- the urethane prepolymer (A) in the main agent (i) has 1 mol of the isocyanate group contained in the main agent (i).
- the total number of moles of the group that reacts with the isocyanate group including the polyol (B) and the water (C) in the curing agent (ii) is preferably in the range of 0.7 to 1.5. A range of 8 to 1.2 is more preferable.
- the urethane foam composition is heated and held in a state of being injected into the mold, foamed and cured, and preferably left in a mold at 40 to 120 ° C. for 5 to 20 minutes, to obtain a molded product. Subsequently, the obtained molded product is taken out, and after-curing is preferably performed under conditions of 80 to 120 ° C. and 8 to 17 hours to obtain a bump cushion.
- the density of the bump cushion obtained by the above method is preferably in the range of 0.3 to 0.9 kg / m 3 from the viewpoint of repeated compression durability, and is preferably 0.4 to 0.8 kg / m 3 . A range is more preferred.
- the density of the said bump cushion shows the value computed from the value obtained by measuring the mass (kg) and the volume (m 3 ) of the bump cushion.
- the hardness of the bump cushion is preferably in the range of 50 to 99 from the viewpoint of repeated compression durability. A range of 70 to 95 is more preferable. Note that the hardness of the bump cushion is a value evaluated by a type C in a spring hardness test in accordance with JIS K7312-1996 (hardness test).
- Example 1 To a 1 liter 4-neck round bottom flask equipped with a nitrogen inlet tube, a condenser for cooling, a thermometer, and a stirrer, 4,4′-diphenylmethane diisocyanate (“Millionate MT” manufactured by Nippon Polyurethane Industry Co., Ltd., hereinafter abbreviated as “MDI”) 100 parts by weight were charged and stirring was started. Next, 80 parts by mass of polyester polyol (“Polylite CMA-244” manufactured by DIC Corporation, number average molecular weight: 2,000) and 2.7 parts by mass of 3-methyl-1,5-pentanediol were charged in portions and mixed. The reaction was carried out at 60 ° C.
- NCO equivalent an isocyanate group equivalent
- Example 2 100 parts by mass of MDI was charged into a 1 liter four-necked round bottom flask equipped with a nitrogen inlet tube, a condenser for cooling, a thermometer, and a stirrer, and stirring was started. Next, 80 parts by mass of a polyester polyol (“Polylite CMA-244”) and 0.9 part by mass of 3-methyl-1,5-pentanediol were charged in a divided manner and reacted at 60 ° C. for 6 hours under a nitrogen stream. A urethane prepolymer (A-2) having an isocyanate group with an NCO equivalent of 256 was obtained and used as a main agent (i-2).
- a urethane prepolymer (A-2) having an isocyanate group with an NCO equivalent of 256 was obtained and used as a main agent (i-2).
- Example 3 100 parts by mass of MDI was charged into a 1 liter four-necked round bottom flask equipped with a nitrogen inlet tube, a condenser for cooling, a thermometer, and a stirrer, and stirring was started. Next, 80 parts by mass of a polyester polyol (“Polylite CMA-244”) and 5.6 parts by mass of 3-methyl-1,5-pentanediol were charged in a divided manner and reacted at 60 ° C. for 6 hours under a nitrogen stream. A urethane prepolymer (A-3) having an isocyanate group with an NCO equivalent of 296 was obtained and used as a main agent (i-3).
- a urethane prepolymer (A-3) having an isocyanate group with an NCO equivalent of 296 was obtained and used as a main agent (i-3).
- Example 4 100 parts by mass of MDI was charged into a 1 liter four-necked round bottom flask equipped with a nitrogen inlet tube, a condenser for cooling, a thermometer, and a stirrer, and stirring was started. Next, 80 parts by mass of a polyester polyol (“Polylite CMA-244”) and 2.7 parts by mass of 2-methyl-1,3-propanediol were charged in a divided manner and reacted at 60 ° C. for 6 hours under a nitrogen stream. A urethane prepolymer (A-4) having an isocyanate group having an NCO equivalent of 275 was obtained and used as a main agent (i-4).
- a urethane prepolymer (A-4) having an isocyanate group having an NCO equivalent of 275 was obtained and used as a main agent (i-4).
- Example 5 100 parts by mass of MDI was charged into a 1 liter four-necked round bottom flask equipped with a nitrogen inlet tube, a condenser for cooling, a thermometer, and a stirrer, and stirring was started. Next, 80 parts by mass of polyester polyol (“Polylite CMA-244”) and 2.7 parts by mass of 1,2-butanediol were charged and mixed in portions, and reacted at 60 ° C. for 6 hours under a nitrogen stream. The urethane prepolymer (A-5) having an isocyanate group was obtained and used as the main agent (i-5). Next, the temperature of the main agent (i-5) and the curing agent (ii-1) is adjusted to 50 ° C.
- polyester polyol (“Polylite CMA-244”)
- 1,2-butanediol 1,2-butanediol
- Example 6 100 parts by mass of MDI was charged into a 1 liter four-necked round bottom flask equipped with a nitrogen inlet tube, a condenser for cooling, a thermometer, and a stirrer, and stirring was started. Next, 80 parts by mass of polyester polyol (“Polylite CMA-244”) and 2.7 parts by mass of 2-butyl-2-ethyl-1,3-propanediol were charged in portions and mixed, and the mixture was 6 hours at 60 ° C. in a nitrogen stream. The reaction was carried out to obtain a urethane prepolymer (A-6) having an isocyanate group with an NCO equivalent of 263, which was used as the main agent (i-6).
- A-6 urethane prepolymer
- Example 7 100 parts by mass of MDI was charged into a 1 liter four-necked round bottom flask equipped with a nitrogen inlet tube, a condenser for cooling, a thermometer, and a stirrer, and stirring was started.
- a polyol obtained by addition polymerization of lactone to polytetramethylene glycol (“Polylite CMA-1000” manufactured by DIC Corporation, lactone addition rate 50%, number average molecular weight; 1,900) 80 parts by mass and 3-methyl-1,5 -2.7 parts by weight of pentanediol were charged in portions and mixed, and reacted at 60 ° C for 6 hours under a nitrogen stream to obtain a urethane prepolymer (A-7) having an isocyanate group with an NCO equivalent of 263. i-7).
- a polyol obtained by addition polymerization of lactone to polytetramethylene glycol and 40 parts by mass of polycaprolactone polyol (“Polylite OD-X-2588” manufactured by DIC Corporation, number average molecular weight; 850), 15.9 parts by weight of ethylene glycol, 0.7 parts by weight of ion-exchanged water, 0.15 parts by weight of a foam stabilizer (“silicon Y-7006”) and 0.4 parts by weight of triethylenediamine are mixed and mixed thoroughly.
- a curing agent (ii-2) was obtained.
- the temperature of the main agent (i-7) and the curing agent (ii-2) is adjusted to 50 ° C.
- a urethane foam composition was prepared by stirring and mixing at a mass ratio of 58, and 3.5 parts by mass was poured into a cylindrical mold (diameter 19 mm ⁇ height 25 mm) preheated to 50 ° C. After closing the mold, the mold was left at 50 ° C. for 5 minutes, and then the bump cushion, which was a foamed molded product, was taken out.
- the obtained bump cushion had a density of 0.55 kg / m 3 and a hardness of 85.
- PEs Polyester polyol
- PTMG / Lc Polyol obtained by addition polymerization of lactone to polytetramethylene glycol
- PCL Polycaprolactone polyol
- 3MPD 3-methyl-1,5-pentanediol
- 2MPD 2- Methyl-1,3-propanediol
- 1,2-BG 1,2-butanediol
- BEPD 2-butyl-2-ethyl-1,3-propanediol
- EG ethylene glycol
- 1,4 -BG 1,4-butanediol
- 1,3-PG 1,3-propanediol
- Examples 1 to 7 which are the bump cushions of the present invention, were all excellent in repeated compression durability and had little settling.
- Comparative Example 1 was an embodiment in which the branched structure glycol (a3) was not used, but repeated compression durability was poor.
- Comparative Example 2 is an embodiment in which ethylene glycol is used instead of glycol (a3) having a branched structure, but the urethane prepolymer is gel-like and cloudy, has poor stability, and a foam molded product cannot be obtained. It was.
- Comparative Example 3 is an embodiment in which 1,4-butanediol is used in place of glycol (a3) having a branched structure, but the urethane prepolymer is gel-like and cloudy, has poor stability, and is a foam molded product. Can not get.
- Comparative Example 4 is an embodiment in which 1,3-propanediol was used instead of glycol (a3) having a branched structure, but repeated compression durability was poor.
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- Polyurethanes Or Polyureas (AREA)
- Vehicle Body Suspensions (AREA)
- Fluid-Damping Devices (AREA)
Abstract
Description
カラム:東ソー株式会社製の下記のカラムを直列に接続して使用した。
「TSKgel G5000」(7.8mmI.D.×30cm)×1本
「TSKgel G4000」(7.8mmI.D.×30cm)×1本
「TSKgel G3000」(7.8mmI.D.×30cm)×1本
「TSKgel G2000」(7.8mmI.D.×30cm)×1本
検出器:RI(示差屈折計)
カラム温度:40℃
溶離液:テトラヒドロフラン(THF)
流速:1.0mL/分
注入量:100μL(試料濃度0.4質量%のテトラヒドロフラン溶液)
標準試料:下記の標準ポリスチレンを用いて検量線を作成した。
東ソー株式会社製「TSKgel 標準ポリスチレン A-500」
東ソー株式会社製「TSKgel 標準ポリスチレン A-1000」
東ソー株式会社製「TSKgel 標準ポリスチレン A-2500」
東ソー株式会社製「TSKgel 標準ポリスチレン A-5000」
東ソー株式会社製「TSKgel 標準ポリスチレン F-1」
東ソー株式会社製「TSKgel 標準ポリスチレン F-2」
東ソー株式会社製「TSKgel 標準ポリスチレン F-4」
東ソー株式会社製「TSKgel 標準ポリスチレン F-10」
東ソー株式会社製「TSKgel 標準ポリスチレン F-20」
東ソー株式会社製「TSKgel 標準ポリスチレン F-40」
東ソー株式会社製「TSKgel 標準ポリスチレン F-80」
東ソー株式会社製「TSKgel 標準ポリスチレン F-128」
東ソー株式会社製「TSKgel 標準ポリスチレン F-288」
東ソー株式会社製「TSKgel 標準ポリスチレン F-550」
窒素導入管、冷却用コンデンサー、温度計、攪拌機を備えた1リットル4ッ口丸底フラスコに、4,4’-ジフェニルメタンジイソシアネート(日本ポリウレタン工業株式会社製「ミリオネートMT」、以下「MDI」と略記する。)100質量部を仕込み、攪拌を開始した。次いで、ポリエステルポリオール(DIC株式会社製「ポリライトCMA-244」、数平均分子量;2,000)80質量部と3-メチル-1,5-ペンタンジオール2.7質量部を分割で仕込み混合し、窒素気流下60℃で6時間反応を行い、イソシアネート基当量(以下、「NCO当量」と略記する。)269のイソシアネート基を有するウレタンプレポリマー(A-1)を得て、主剤(i-1)とした。
次いで、ポリエステルポリオール(ポリライトCMA-244)60質量部とポリカプロラクトンポリオール(DIC株式会社製「ポリライトOD-X-2588」、数平均分子量;850)40質量部、エチレングリコール15.9質量部、イオン交換水0.7質量部、整泡剤(日本ユニカー株式会社製「シリコン Y-7006」)0.15質量部、トリエチレンジアミン0.4質量部を配合し、充分に撹拌、混合し、硬化剤(ii-1)を得た。
次いで、容器に前記主剤(i-1)と、前記硬化剤(ii-1)を50℃に温調し、〔主剤(i-1)〕/〔硬化剤(ii-1)〕=100/60の質量比で攪拌、混合して、発泡ウレタン組成物を調製し、50℃に予め加熱した円柱状の金型(直径19mm×高さ25mm)中に3.5質量部を注入し、直ちに金型の蓋をした後、50℃で5分間放置し、その後、できあがった発泡成形物であるバンプクッションを取り出した。得られたバンプクッションは、密度;0.55kg/m3、硬度;85であった。
窒素導入管、冷却用コンデンサー、温度計、攪拌機を備えた1リットル4ッ口丸底フラスコに、MDIを100質量部仕込み、攪拌を開始した。次いで、ポリエステルポリオール(「ポリライトCMA-244」)80質量部と3-メチル-1,5-ペンタンジオール0.9質量部を分割で仕込み混合し、窒素気流下60℃で6時間反応を行い、NCO当量が256のイソシアネート基を有するウレタンプレポリマー(A-2)を得て、主剤(i-2)とした。
次いで、容器に前記主剤(i-2)と、前記硬化剤(ii-1)を50℃に温調し、〔主剤(i-2)〕/〔硬化剤(ii-1)〕=100/63.3の質量比で攪拌、混合して、発泡ウレタン組成物を調製し、50℃に予め加熱した円柱状の金型(直径19mm×高さ25mm)中に3.5質量部を注入し、直ちに金型の蓋をした後、50℃で5分間放置し、その後、できあがった発泡成形物であるバンプクッションを取り出した。得られたバンプクッションは、密度;0.55kg/m3、硬度;84であった。
窒素導入管、冷却用コンデンサー、温度計、攪拌機を備えた1リットル4ッ口丸底フラスコに、MDIを100質量部仕込み、攪拌を開始した。次いで、ポリエステルポリオール(「ポリライトCMA-244」)80質量部と3-メチル-1,5-ペンタンジオール5.6質量部を分割で仕込み混合し、窒素気流下60℃で6時間反応を行い、NCO当量が296のイソシアネート基を有するウレタンプレポリマー(A-3)を得て、主剤(i-3)とした。
次いで、容器に前記主剤(i-3)と、前記硬化剤(ii-1)を50℃に温調し、〔主剤(i-3)〕/〔硬化剤(ii-1)〕=100/54.7の質量比で攪拌、混合して、発泡ウレタン組成物を調製し、50℃に予め加熱した円柱状の金型(直径19mm×高さ25mm)中に3.5質量部を注入し、直ちに金型の蓋をした後、50℃で5分間放置し、その後、できあがった発泡成形物であるバンプクッションを取り出した。得られたバンプクッションは、密度;0.55kg/m3、硬度;86であった。
窒素導入管、冷却用コンデンサー、温度計、攪拌機を備えた1リットル4ッ口丸底フラスコに、MDIを100質量部仕込み、攪拌を開始した。次いで、ポリエステルポリオール(「ポリライトCMA-244」)80質量部と2-メチル-1,3-プロパンジオール2.7質量部を分割で仕込み混合し、窒素気流下60℃で6時間反応を行い、NCO当量が275のイソシアネート基を有するウレタンプレポリマー(A-4)を得て、主剤(i-4)とした。
次いで、容器に前記主剤(i-4)と、前記硬化剤(ii-1)を50℃に温調し、〔主剤(i-4)〕/〔硬化剤(ii-1)〕=100/59の質量比で攪拌、混合して、発泡ウレタン組成物を調製し、50℃に予め加熱した円柱状の金型(直径19mm×高さ25mm)中に3.5質量部を注入し、直ちに金型の蓋をした後、50℃で5分間放置し、その後、できあがった発泡成形物であるバンプクッションを取り出した。得られたバンプクッションは、密度;0.55kg/m3、硬度;85であった。
窒素導入管、冷却用コンデンサー、温度計、攪拌機を備えた1リットル4ッ口丸底フラスコに、MDIを100質量部仕込み、攪拌を開始した。次いで、ポリエステルポリオール(「ポリライトCMA-244」)80質量部と1,2-ブタンジオール2.7質量部を分割で仕込み混合し、窒素気流下60℃で6時間反応を行い、NCO当量が275のイソシアネート基を有するウレタンプレポリマー(A-5)を得て、主剤(i-5)とした。
次いで、容器に前記主剤(i-5)と、前記硬化剤(ii-1)を50℃に温調し、〔主剤(i-5)〕/〔硬化剤(ii-1)〕=100/59の質量比で攪拌、混合して、発泡ウレタン組成物を調製し、50℃に予め加熱した円柱状の金型(直径19mm×高さ25mm)中に3.5質量部を注入し、直ちに金型の蓋をした後、50℃で5分間放置し、その後、できあがった発泡成形物であるバンプクッションを取り出した。得られたバンプクッションは、密度;0.55kg/m3、硬度;85であった。
窒素導入管、冷却用コンデンサー、温度計、攪拌機を備えた1リットル4ッ口丸底フラスコに、MDIを100質量部仕込み、攪拌を開始した。次いで、ポリエステルポリオール(「ポリライトCMA-244」)80質量部と2-ブチル-2-エチル-1,3-プロパンジオール2.7質量部を分割で仕込み混合し、窒素気流下60℃で6時間反応を行い、NCO当量が263のイソシアネート基を有するウレタンプレポリマー(A-6)を得て、主剤(i-6)とした。
次いで、容器に前記主剤(i-6)と、前記硬化剤(ii-1)を50℃に温調し、〔主剤(i-6)〕/〔硬化剤(ii-1)〕=100/61.6の質量比で攪拌、混合して、発泡ウレタン組成物を調製し、50℃に予め加熱した円柱状の金型(直径19mm×高さ25mm)中に3.5質量部を注入し、直ちに金型の蓋をした後、50℃で5分間放置し、その後、できあがった発泡成形物であるバンプクッションを取り出した。得られたバンプクッションは、密度;0.55kg/m3、硬度;85であった。
窒素導入管、冷却用コンデンサー、温度計、攪拌機を備えた1リットル4ッ口丸底フラスコに、MDIを100質量部仕込み、攪拌を開始した。次いで、ポリテトラメチレングリコールにラクトンを付加重合したポリオール(DIC株式会社製「ポリライトCMA-1000」、ラクトン付加率50%、数平均分子量;1,900)80質量部と3-メチル-1,5-ペンタンジオール2.7質量部を分割で仕込み混合し、窒素気流下60℃で6時間反応を行い、NCO当量が263のイソシアネート基を有するウレタンプレポリマー(A-7)を得て、主剤(i-7)とした。
次いで、ポリテトラメチレングリコールにラクトンを付加重合したポリオール(ポリライトCMA-1000)60質量部とポリカプロラクトンポリオール(「ポリライトOD-X-2588」DIC株式会社製、数平均分子量;850)40質量部、エチレングリコール15.9質量部、イオン交換水0.7質量部、整泡剤(「シリコン Y-7006」)0.15質量部、トリエチレンジアミン0.4質量部を配合し、充分に撹拌、混合し、硬化剤(ii-2)を得た。
次いで、容器に前記主剤(i-7)と、前記硬化剤(ii-2)を50℃に温調し、〔主剤(i-6)〕/〔硬化剤(ii-2)〕=100/60.4の質量比で攪拌、混合して、発泡ウレタン組成物を調製し、50℃に予め加熱した円柱状の金型(直径19mm×高さ25mm)中に3.5質量部を注入し、直ちに金型の蓋をした後、50℃で5分間放置し、その後、できあがった発泡成形物であるバンプクッションを取り出した。得られたバンプクッションは、密度;0.55kg/m3、硬度;83であった。
窒素導入管、冷却用コンデンサー、温度計、攪拌機を備えた1リットル4ッ口丸底フラスコに、MDIを100質量部仕込み、攪拌を開始した。次いで、ポリエステルポリオール(「ポリライトCMA-244」)80質量部を分割で仕込み混合し、窒素気流下60℃で6時間反応を行い、NCO当量が249のイソシアネート基を有するウレタンプレポリマー(A-8)を得て、主剤(i-8)とした。
次いで、容器に前記主剤(i-8)と、前記硬化剤(ii-1)を50℃に温調し、〔主剤(i-8)〕/〔硬化剤(ii-1)〕=100/65.1の質量比で攪拌、混合して、発泡ウレタン組成物を調製し、50℃に予め加熱した円柱状の金型(直径19mm×高さ25mm)中に3.5質量部を注入し、直ちに金型の蓋をした後、50℃で5分間放置し、その後、できあがった発泡成形物であるバンプクッションを取り出した。得られたバンプクッションは、密度;0.55kg/m3、硬度;84であった。
窒素導入管、冷却用コンデンサー、温度計、攪拌機を備えた1リットル4ッ口丸底フラスコに、MDIを100質量部仕込み、攪拌を開始した。次いで、ポリエステルポリオール(「ポリライトCMA-244」)80質量部とエチレングリコール2.73質量部を分割で仕込み混合し、窒素気流下60℃で6時間反応を行い、NCO当量が287のイソシアネート基を有するウレタンプレポリマー(A-9)を得た。しかしながら、前記ウレタンプレポリマー(A-9)は、ゲル状かつ白濁しており安定性が不良で、発泡成形物を得られなかった。従って、以降の評価を行わず「-」と記載した。
窒素導入管、冷却用コンデンサー、温度計、攪拌機を備えた1リットル4ッ口丸底フラスコに、MDIを100質量部仕込み、攪拌を開始した。次いで、ポリエステルポリオール(「ポリライトCMA-244」)80質量部と1,4-ブタンジオール2.73質量部を分割で仕込み混合し、窒素気流下60℃で6時間反応を行い、NCO当量が275のイソシアネート基を有するウレタンプレポリマー(A-10)を得た。しかしながら、前記ウレタンプレポリマー(A-10)は、ゲル状かつ白濁しており安定性が不良で、発泡成形物を得られなかった。従って、以降の評価を行わず「-」と記載した。
窒素導入管、冷却用コンデンサー、温度計、攪拌機を備えた1リットル4ッ口丸底フラスコに、MDIを100質量部仕込み、攪拌を開始した。次いで、ポリエステルポリオール(「ポリライトCMA-244」)80質量部と1,3-プロパンジオール2.7質量部を分割で仕込み混合し、窒素気流下60℃で6時間反応を行い、NCO当量が281のイソシアネート基を有するウレタンプレポリマー(A-11)を得て、主剤(i-11)とした。
次いで、容器に前記主剤(i-11)と、前記硬化剤(ii-1)を50℃に温調し、〔主剤(i-11)〕/〔硬化剤(ii-1)〕=100/58の質量比で攪拌、混合して、発泡ウレタン組成物を調製し、50℃に予め加熱した円柱状の金型(直径19mm×高さ25mm)中に3.5質量部を注入し、直ちに金型の蓋をした後、50℃で5分間放置し、その後、できあがった発泡成形物であるバンプクッションを取り出した。得られたバンプクッションは、密度;0.55kg/m3、硬度;85であった。
実施例及び比較例で得られた円柱状のバンプクッションを圧縮率60%、5Hzの条件にて繰り返し圧縮試験を行い、バンプクッションが破損するまでの耐久回数を観察した。
実施例及び比較例で得られた円柱状のバンプクッションを圧縮率60%、5Hzの条件にて繰り返し圧縮試験を1万回行い、下記計算式(1)により、ヘタリ(%)を算出した。なお、繰り返し圧縮試験を1万回行う前にバンプクッションが破損してしまったものは、ヘタリを評価できなかったため「-」と記載した。
「PEs」:ポリエステルポリオール
「PTMG/Lc」:ポリテトラメチレングリコールにラクトンを付加重合したポリオール
「PCL」:ポリカプロラクトンポリオール
「3MPD」:3-メチル-1,5-ペンタンジオール
「2MPD」:2-メチル-1,3-プロパンジオール
「1,2-BG」:1,2-ブタンジオール
「BEPD」:2-ブチル-2-エチル-1,3-プロパンジオール
「EG」:エチレングリコール
「1,4-BG」:1,4-ブタンジオール
「1,3-PG」:1,3-プロパンジオール
Claims (6)
- 数平均分子量が800~3,000の範囲のポリオール(a1)、ポリイソシアネート(a2)及び数平均分子量が80~300の範囲の分岐構造を有するグリコール(a3)を反応させて得られるイソシアネート基を有するウレタンプレポリマー(A)を含む主剤(i)と、活性水素原子を有する化合物(B)及び水(C)を含む硬化剤(ii)とを含有することを特徴とする発泡ウレタン組成物。
- 前記グリコール(a3)が、2-メチル-1,5-ペンタンジオール、3-メチル-1,5-ペンタンジオール、1,2-ブタンジオール、1,3-ブタンジオール及び2-ブチル-2-エチル-1,3-プロパンジオールからなる群より選ばれる1種以上のものである請求項1記載の発泡ウレタン組成物。
- 前記グリコール(a3)の使用量が、前記ポリオール(a1)、前記ポリイソシアネート(a2)及び前記グリコール(a3)の合計中0.1~4.5質量%の範囲である請求項1記載の発泡ウレタン組成物。
- 前記活性水素原子を有する化合物(B)が、ポリエステルポリオール、ポリエーテルポリオール、ポリカプロラクトンポリオール及びポリテトラメチレングリコールにラクトンを付加重合したポリオールからなる群より選ばれる1種以上のものである請求項1記載の発泡ウレタン組成物。
- 前記ポリイソシアネート(a2)が、4,4’-ジフェニルメタンジイソシアネートである請求項1記載の発泡ウレタン組成物。
- 請求項1~5のいずれか1項記載の発泡ウレタン組成物を発泡及び硬化させることにより得られることを特徴とするバンプクッション。
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Cited By (3)
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WO2019163621A1 (ja) * | 2018-02-22 | 2019-08-29 | Dic株式会社 | 湿気硬化型ポリウレタンホットメルト樹脂組成物、及び、その硬化物 |
US20220251281A1 (en) * | 2019-07-22 | 2022-08-11 | Dow Global Technologies Llc | Polyurethane compositions, products prepared with same and preparation methods thereof |
US20220315690A1 (en) * | 2019-07-22 | 2022-10-06 | Dow Global Technologies Llc | Polyurethane compositions, products prepared with same and preparation methods thereof |
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WO2019163621A1 (ja) * | 2018-02-22 | 2019-08-29 | Dic株式会社 | 湿気硬化型ポリウレタンホットメルト樹脂組成物、及び、その硬化物 |
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US20220315690A1 (en) * | 2019-07-22 | 2022-10-06 | Dow Global Technologies Llc | Polyurethane compositions, products prepared with same and preparation methods thereof |
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JP7464693B2 (ja) | 2019-07-22 | 2024-04-09 | ダウ グローバル テクノロジーズ エルエルシー | ポリウレタン組成物、それを用いて調製された製品およびその調製方法 |
Also Published As
Publication number | Publication date |
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CN105492481A (zh) | 2016-04-13 |
MY176659A (en) | 2020-08-19 |
KR20160045756A (ko) | 2016-04-27 |
KR101791453B1 (ko) | 2017-10-30 |
JP5858315B2 (ja) | 2016-02-10 |
JPWO2015033734A1 (ja) | 2017-03-02 |
CN105492481B (zh) | 2017-10-27 |
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