JPH0238042A - Production of surface coated steel plate for thermal adhesion - Google Patents

Production of surface coated steel plate for thermal adhesion

Info

Publication number
JPH0238042A
JPH0238042A JP18701688A JP18701688A JPH0238042A JP H0238042 A JPH0238042 A JP H0238042A JP 18701688 A JP18701688 A JP 18701688A JP 18701688 A JP18701688 A JP 18701688A JP H0238042 A JPH0238042 A JP H0238042A
Authority
JP
Japan
Prior art keywords
resin
emulsion
steel plate
epoxy resin
coating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP18701688A
Other languages
Japanese (ja)
Inventor
Hideo Kobayashi
秀夫 小林
Katsuro Yamaguchi
山口 勝郎
Yasuo Yokoyama
横山 靖雄
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
Original Assignee
Kawasaki Steel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP18701688A priority Critical patent/JPH0238042A/en
Publication of JPH0238042A publication Critical patent/JPH0238042A/en
Pending legal-status Critical Current

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  • Laminated Bodies (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Abstract

PURPOSE:To enhance blocking resistance and weldability by adding an emulsion of a thermosetting epoxy resin to an emulsion of a specific thermoplastic acrylic resin and further adding a predetermined amount of a high temp. reaction type curing agent to prepare a liquid mixture and applying said mixture to the surface of a steel plate to bake the coating layer. CONSTITUTION:On a resin wt. basis, 5-120pts.wt. of an emulsion of a thermosetting epoxy resin having a glass transition point of 55-150 deg.C is added to 100pts.wt. of an emulsion of a thermoplastic acrylic resin having a glass transition point of 55-150 deg.C and a high temp. reaction type curing agent is further added thereto within a range of + or -20% of the stoichiometric addition amount of the epoxy resin to prepare a liquid mixture which is, in turn, uniformly applied to the surface of a steel plate and baked. The thickness of the dry film after the coating and baking of the liquid mixture is desirably 0.5-10mum.

Description

【発明の詳細な説明】 〈産業上の利用分野〉 本発明は、打抜き、剪断やプレス加工後に、加圧及び加
熱により接着して用いられる表面処理鋼板の製造方法に
関するもので、特に、電磁鋼板の絶縁被膜の形成に有利
に用いることができる。
Detailed Description of the Invention <Industrial Application Field> The present invention relates to a method for manufacturing a surface-treated steel sheet that is used by bonding by pressurizing and heating after punching, shearing, or press working, and particularly relates to a method for manufacturing a surface-treated steel sheet that is used by bonding by pressing and heating after punching, shearing, or pressing. It can be advantageously used for forming an insulating film.

〈従来の技術〉 加圧及び加熱により接着する表面処理鋼板の表面被覆に
要求される特性としては、加圧・加熱接着性、耐ブロン
キング性、溶接性、打抜性、剪断性、プレス加工性や耐
食性など数多く挙げられる。
<Prior art> Properties required for the surface coating of surface-treated steel sheets that are bonded by pressure and heat are pressure/heat adhesion, bronking resistance, weldability, punchability, shearability, and press workability. There are many examples, such as durability and corrosion resistance.

これらの諸要求を満たすため数多くの研究がなされてお
り、表面処理方法や表面処理被膜組成に関して数多くの
提案がなされている。
Many studies have been conducted to meet these demands, and many proposals have been made regarding surface treatment methods and surface treatment film compositions.

アクリル樹脂エマルジョンとエポキシ樹脂エマルジョン
とを混合して使用する例として、[鉄と鋼J第72年第
8号P 1038〜1043 (1986)で自動車用
防錆鋼板が公知となっている。これは有機複合シリケー
トとして総合的に優れた品質特性を得るために、耐食性
に特徴のあるアクリル複合シリケートと塗料密着性に特
徴のあるエポキシ複合シリケートの混合比とシリカゾル
成分比を検討したもので、本発明とは、その目的及び用
途を全く異にするものである。
As an example of using a mixture of an acrylic resin emulsion and an epoxy resin emulsion, a rust-proof steel plate for automobiles is known in Tetsu to Hagane J No. 72, No. 8, P 1038-1043 (1986). This study investigated the mixing ratio of acrylic composite silicate, which is characterized by corrosion resistance, and epoxy composite silicate, which is characterized by paint adhesion, and the silica sol component ratio, in order to obtain overall excellent quality characteristics as an organic composite silicate. The purpose and use of the present invention are completely different.

さらに、アクリル、エポキシ使用の水溶性塗料組成物と
して特公昭63−13456号公報に開示されているも
のは、水溶性エポキシ変性アルキッド樹脂に1種もしく
は2種以上のアクリル系官能性モノマーを該水溶性エポ
キシ変性アルキッド樹脂100重量部に対して1〜30
重量部添加し、加熱付加重合して得られる樹脂からなる
水溶性塗料用組成物で、上記樹脂100重景部に対し、
チタネート系カップリング剤が0.1〜1.0重量部均
一に分散されていることを特徴としている。しかし、こ
の発明は車輌の燃料タンク等の素材、即ち防錆を特に要
求される部位の素材として使用する錫−鉛合金めっきm
仮に供する水溶性塗料用組成物に関するものであり、本
発明とはその目的及び用途が全く異なるものである。
Furthermore, the water-soluble coating composition using acrylic and epoxy disclosed in Japanese Patent Publication No. 13456/1983 is a water-soluble epoxy-modified alkyd resin in which one or more acrylic functional monomers are added to the water-soluble epoxy-modified alkyd resin. 1 to 30 parts by weight per 100 parts by weight of epoxy-modified alkyd resin
A water-soluble coating composition comprising a resin obtained by adding parts by weight and heating and addition polymerizing, for 100 parts by weight of the above resin,
It is characterized in that 0.1 to 1.0 parts by weight of a titanate coupling agent is uniformly dispersed. However, this invention is a tin-lead alloy plating material used as a material for vehicle fuel tanks, etc., that is, parts where rust prevention is particularly required.
This invention relates to a temporarily provided water-soluble paint composition, and its purpose and application are completely different from those of the present invention.

加熱接着用表面被覆鋼板としては、特公昭528998
号公報に次のように開示されている。
As a surface-coated steel plate for heat bonding, Japanese Patent Publication No. 528998
The following is disclosed in the publication:

鋼板の表面に熱可塑性樹脂と熱硬化性樹脂を主成分とす
る処理液を塗布するにさいし、熱可塑性樹脂1部に対し
て熱硬化性樹脂0.1〜1.2部の割合で混合して有機
溶剤で溶液化し、樹脂濃度を30〜70%に調整した後
、樹脂成分1部に対して乳化剤を0.1〜0.8部を加
え、更に水を加えて水エマルジヨン化した処理液を鋼板
表面に均一に塗布乾燥することを特徴とする、接着用表
面被覆鋼板の製造方法である。
When applying a treatment liquid containing thermoplastic resin and thermosetting resin as main components to the surface of a steel plate, mix 0.1 to 1.2 parts of thermosetting resin to 1 part of thermoplastic resin. The treated solution is made into a water emulsion by adding 0.1 to 0.8 parts of an emulsifier to 1 part of the resin component and further adding water. This is a method for producing a surface-coated steel plate for adhesive use, which comprises uniformly applying and drying the adhesive on the surface of the steel plate.

また特公昭52−8999号公報には、鋼板表面に、ア
クリル系樹脂水エマルジョンと水溶性フェノール樹脂、
水溶性メラミン樹脂との混合液を均一に塗布乾燥し、塗
膜を不完全状態に焼付けることを特徴とする接着用表面
被覆鋼板の製造方法が開示されている。
In addition, Japanese Patent Publication No. 52-8999 discloses that an acrylic resin water emulsion and a water-soluble phenol resin are applied to the surface of a steel plate.
A method for manufacturing a surface-coated steel sheet for adhesive use is disclosed, which comprises uniformly applying and drying a mixture with a water-soluble melamine resin, and baking the coating film in an incomplete state.

〈発明が解決しようとする課題〉 しかしながら上述した方法などにより得られる表面被膜
を有する鋼板は、加圧・加熱接着性は良好なものの、客
先での使用前の保管状態によってはブロッキングするト
ラブルが生じていた。
<Problems to be Solved by the Invention> However, although steel sheets with a surface coating obtained by the above-mentioned method have good adhesive properties under pressure and heat, they may cause problems such as blocking depending on the storage conditions before use at the customer's site. It was happening.

またこのような表面被膜を絶縁被膜として使用するit
 iff w44反はトランスやモーターなどの鉄芯と
して用いられる。加圧・加熱接着性良好な絶縁被膜を有
する電&f鋼板コイルを、スリット加工の後にコアーに
打抜き、これを積層して加圧、加熱接着によりコアーブ
ロックとし、所要の部品に組立てる。これが小型電源ト
ランスの場合には、Eコアーブロック、Iコアーブロッ
クにした後に巻線し、EコアーブロックとIコアーブロ
ックを溶接で接合するがこれが出来ない欠点があった。
It is also possible to use such a surface coating as an insulating coating.
IF W44 is used as the iron core of transformers, motors, etc. After slitting, an electric & f steel sheet coil having an insulating film with good pressure and heat adhesion is punched into a core, which is then laminated to form a core block by pressure and heat adhesion, and assembled into the required parts. In the case of a small power transformer, the wires are wound after forming an E core block and an I core block, and the E core block and I core block are joined by welding, but there is a drawback that this cannot be done.

そこで本発明の目的は耐ブロッキング性及び溶接性に優
れた加熱接着用表面被覆鋼板の製造方法を提案するにあ
る。
Therefore, an object of the present invention is to propose a method for manufacturing a surface-coated steel plate for heat bonding that has excellent anti-blocking properties and weldability.

〈課題を解決するための手段〉 本発明は上述の問題を有利に解決すべく鋭意研究を重ね
た結果開発されたもので、その要旨は、鋼板表面に、ガ
ラス転移点(Tg)が55〜150℃の熱可塑性アクリ
ル樹脂のエマルジョン中の樹脂分100重量部に対して
、ガラス転移点(Tg)が55〜tso ’cの熱硬化
性エポキシ樹脂のエマルジョン中の樹脂分5〜120重
量部を加え、さらにこれに高温反応型硬化剤を該エポキ
シ樹脂の化学m論的添加量の±20%の範囲で加えた混
合液を均一に塗布し、焼付けることを特徴とする耐ブロ
ンキング性及び溶接性に優れた加熱接着用表面被覆鋼板
の製造方法である。
<Means for Solving the Problems> The present invention was developed as a result of extensive research to advantageously solve the above-mentioned problems. For 100 parts by weight of the resin content in the emulsion of thermoplastic acrylic resin at 150°C, 5 to 120 parts by weight of the resin content in the emulsion of thermosetting epoxy resin with a glass transition point (Tg) of 55 to tso'c. In addition, a mixture solution containing a high-temperature-reactive curing agent in a range of ±20% of the chemical addition amount of the epoxy resin is uniformly applied and baked. This is a method for manufacturing a surface-coated steel plate for heat bonding with excellent weldability.

く作 用〉 本発明に用いる基地鋼板としては軟鋼板、電磁鋼板、ス
テンレス鋼板並びに特殊鋼板の熱間圧延板及び冷間圧延
板のいずれも使用することができ、m仮を特に限定する
ものではない。またこれらの鋼板表面にZn、 Ni、
 Sn又はCrなどの金属めっきやZn−Ni、 Zn
−Fe又はZn−(:uなどの金属合金めっきが施され
ていても良く、さらに鋼板表面に直接またはめっき表面
にクロメート及びボンデなどの化成処理が施されていて
も良い。また電Ift鋼板の表面に絶縁被膜が施されて
いても良い0以上のように鋼板表面の被覆の有無を特に
限定するものではない。
Function> As the base steel plate used in the present invention, both hot-rolled plates and cold-rolled plates of mild steel plates, electromagnetic steel plates, stainless steel plates, and special steel plates can be used, and m is not particularly limited. do not have. In addition, Zn, Ni,
Metal plating such as Sn or Cr, Zn-Ni, Zn
Metal alloy plating such as -Fe or Zn-(:u) may be applied, and further chemical conversion treatment such as chromate or bonding may be applied directly to the surface of the steel sheet or to the surface of the plating. There is no particular limitation on the presence or absence of a coating on the surface of the steel plate, such as zero or more in which an insulating coating may be applied to the surface.

本発明者らはブロッキングの原因を解明すべく研究調査
をおこなったところ、破面被膜のTg (ガラス転移点
)と関係のあることを知見した。
The present inventors conducted a research investigation to elucidate the cause of blocking, and found that it is related to the Tg (glass transition point) of the fracture surface coating.

また溶接性の良否は被膜成分の樹脂の熱分解の貿易と関
係があり、これがTgと関係があることを知見した。
It was also found that the quality of weldability is related to the thermal decomposition of the resin as a coating component, and that this is related to Tg.

すなわち、Tgが低い樹脂より成る被膜は保管中にブロ
ッキングし易く、また溶接時には熱分解され易く、した
がって熱分解によるガス発生量が多い。このため、′溶
接時の溶接ビードの溶融メタルが凝固する時でもガスを
発生し続け、ブローホールを形成してしまう。これゆえ
溶接部の強度が低下し溶接不良となる。一方T、点の高
い樹脂はブロンキングし難く、また溶接時の熱分解ガス
の発生量が少なく溶接ビードにブローホールが残らず良
好な溶接性を示す。
That is, a coating made of a resin with a low Tg tends to block during storage, and is also susceptible to thermal decomposition during welding, and therefore generates a large amount of gas due to thermal decomposition. Therefore, even when the molten metal of the weld bead during welding solidifies, gas continues to be generated, resulting in the formation of blowholes. Therefore, the strength of the welded part decreases, resulting in poor welding. On the other hand, resins with a high T point are difficult to bronking, generate less pyrolysis gas during welding, do not leave blowholes in the weld bead, and exhibit good weldability.

本発明で用いる熱可塑性アクリル樹脂のガラス転移点(
Tg)は55〜150 ’Cの範囲に限定される。
The glass transition point of the thermoplastic acrylic resin used in the present invention (
Tg) is limited to the range 55-150'C.

TP、が55゛C未満ではブロッキングが強過ぎて表面
被覆鋼板として使用できない。また溶接性が劣化する欠
点がある。一方Tgが150’C超では塗布焼付して得
られた被覆物が硬過ぎて加圧加熱時の接着性能が十分に
発揮出来ない。
When TP is less than 55°C, blocking is too strong and the steel sheet cannot be used as a surface-coated steel sheet. Another disadvantage is that weldability deteriorates. On the other hand, if the Tg exceeds 150'C, the coating obtained by coating and baking will be too hard and will not exhibit sufficient adhesion performance during pressurization and heating.

本発明で用いる熱可塑性アクリル樹脂を構成する非官能
性モノマーとして、(メタ)アクリル酸。
(Meth)acrylic acid is used as a non-functional monomer constituting the thermoplastic acrylic resin used in the present invention.

(メタ)アクリル酸エステル群として01〜C8化合物
でかつこれらのエステルのアルキル基として、メチル基
、エチル基、プロピル基、ブチル基イソデシル基、ラウ
リル基、ドデシル基、セチルステアリル基、エチルヘキ
シル基、シクロヘキシル基、オクチル基、ベンジル基な
どが利用出来る。
The (meth)acrylic acid ester group includes 01 to C8 compounds, and the alkyl groups of these esters include methyl, ethyl, propyl, butyl, isodecyl, lauryl, dodecyl, cetylstearyl, ethylhexyl, and cyclohexyl. group, octyl group, benzyl group, etc. can be used.

−を能性モノマーとして、(メタ)アクリル酸のカルボ
キシル基またはヒドロキシル基などの官能基を有するも
ので、メタクリル酸、メタクリル酸ジメチルアミノエチ
ル、メタクリル酸2−ヒドロキシエチル、メタクリル酸
ターシャリ−ブチルアミノエチル、メタクリル酸2−ヒ
ドロキシプロピル、メタクリル酸グリシジル、メタクリ
ル酸ジメチルアミノエチル、メタクリル酸テトラヒドロ
フルフリルなどが利用出来る。この他にジメタクリル酸
ジエチレングリコールなどの多官能性モノマーを利用し
ても良い。
- as a functional monomer, having a functional group such as the carboxyl group or hydroxyl group of (meth)acrylic acid, such as methacrylic acid, dimethylaminoethyl methacrylate, 2-hydroxyethyl methacrylate, tert-butylaminoethyl methacrylate. , 2-hydroxypropyl methacrylate, glycidyl methacrylate, dimethylaminoethyl methacrylate, tetrahydrofurfuryl methacrylate, etc. can be used. In addition, polyfunctional monomers such as diethylene glycol dimethacrylate may also be used.

これらの少なくとも一種の七ツマ−と共重合する他のモ
ノマーなら特に限定するものではなく、アルキッド、フ
ェノール、エチレン及びプロピレン等のα−オレフィン
、スチレンなどが利用出来る。
Other monomers that can be copolymerized with at least one of these heptamers are not particularly limited, and alkyds, phenol, α-olefins such as ethylene and propylene, styrene, and the like can be used.

ff+fJの7855〜150℃の熱可塑性アクリルエ
マルジョン中の樹脂100重撹部に対して、7855〜
150℃の熱硬化性エポキシエマルジョン中の樹脂分は
5〜120 fflfft部に限定される。5重量部未
満では溶接性が劣化し、120重量部超ではエポキシ樹
脂が高価なため経済性が低下することによる。
7855 to 100 parts of resin in thermoplastic acrylic emulsion at 7855 to 150°C of ff+fJ
The resin content in the 150°C thermosetting epoxy emulsion is limited to 5 to 120 fflfft parts. If it is less than 5 parts by weight, weldability deteriorates, and if it exceeds 120 parts by weight, the epoxy resin is expensive and economical efficiency decreases.

熱硬化性エポキシ樹脂のTgが55゛c未満だと耐ブロ
ッキング性及び溶接性が低下する。一方Tgが150’
C超であると被覆物が硬過ぎて加圧加熱時の接着性能が
十分に発揮出来なくなる。従って熱硬化性エポキシ樹脂
の18は55〜150 ’Cに限定される。
If the Tg of the thermosetting epoxy resin is less than 55°C, blocking resistance and weldability will decrease. On the other hand, Tg is 150'
If it exceeds C, the coating will be too hard and will not be able to exhibit sufficient adhesion performance during pressurization and heating. Therefore, thermosetting epoxy resin 18 is limited to 55-150'C.

本発明で用いる熱硬化性エポキシ樹脂を構成するモノマ
ーとしてビスフェノールΔ ビスフエノルF、ビスフェ
ノールS レゾルシノール へ−1’−4+ ヒードロ
ビスフェノールAジクリシジルエーテル、ポリプロピレ
ングリコールジグリンジルエーテル、ネオペンチルグリ
コールジグリソジルエーテル フタル酸ジグリシジルエ
ステル、ダイマー酸ジグリシジルエステル、1−リグリ
シジルイソシアネーI・ テトラグリシジルジアミノジ
フェニルメタン、テトラグリシジルメタキソメンジアミ
ン。
Monomers constituting the thermosetting epoxy resin used in the present invention include bisphenol Δ bisphenol F, bisphenol S resorcinol he-1'-4+ hydrobisphenol A dicrycidyl ether, polypropylene glycol diglycidyl ether, neopentyl glycol diglysodylether, phthal Acid diglycidyl ester, dimer acid diglycidyl ester, 1-liglycidyl isocyanate I, tetraglycidyldiaminodiphenylmethane, tetraglycidylmethaxomendiamine.

クレゾールノボランクボリグリシジルエーテーしなどが
使用出来る。
Cresol novolane polyglycidyl ether etc. can be used.

これらに用いる硬化剤として、塗布、焼付時に硬化反応
がおこなわれるものならばこれを限定するものではなく
、高温反応型硬化剤として芳香族ポリアミン、酸無水物
、フェノール樹脂(ノボラック型とレヅール型)、アミ
ノ(d脂、ジンアンジアミドならびにヒドラジド化合物
などがある。
The curing agent used for these is not limited to any material that causes a curing reaction during coating and baking, and high-temperature reactive curing agents include aromatic polyamines, acid anhydrides, and phenolic resins (novolac type and rezul type). , amino(d-fat), dianediamide, and hydrazide compounds.

また、前述のアクリル樹脂はエポキシ樹脂の硬化剤に用
いるものではない。
Further, the above-mentioned acrylic resin is not used as a curing agent for epoxy resin.

硬化剤の適正添加量はエポキシ樹脂のエポキシ当危、活
性水素当量の比より化学量論的添加量として計算できる
。この適正量に対して±20%の範囲内での増減は許容
される。エポキシ樹脂と硬化剤の反応温度は塗布後の通
常の焼f寸温度で十分にその性能が発現することが確か
められており、温度範囲を特に限定するものではない。
The appropriate amount of the curing agent to be added can be calculated as the stoichiometric amount from the ratio of the epoxy equivalent and active hydrogen equivalent of the epoxy resin. An increase or decrease within a range of ±20% with respect to this appropriate amount is allowed. It has been confirmed that the reaction temperature between the epoxy resin and the curing agent is sufficient to exhibit its performance at the normal baking temperature after coating, and the temperature range is not particularly limited.

したがって、前述の硬化剤の適正添加量で最高のTgに
到達し、また+20%の範囲内ではTHの低下も僅かで
ある。
Therefore, the maximum Tg can be reached with the above-mentioned appropriate addition amount of the curing agent, and TH decreases only slightly within the range of +20%.

該混合液を塗布する方法としてはロールコータ、カーテ
ンフローコーター、スプレー塗装、スクイズコーターな
ど公知の塗布方法が利用でき、特に限定されない。
The method for applying the liquid mixture is not particularly limited and may be any known coating method such as a roll coater, curtain flow coater, spray coating, or squeeze coater.

該混合液の焼付方法として、熱風乾燥炉、誘導加熱炉、
抵抗加熱炉など公知の焼付炉が利用でき特に限定されな
い。
As a method for baking the mixed liquid, a hot air drying furnace, an induction heating furnace,
A known baking furnace such as a resistance heating furnace can be used without any particular limitation.

該混合液の塗布、焼付後の乾燥膜厚は0.5〜10μが
望ましい。
The dry film thickness after coating and baking the mixture is preferably 0.5 to 10 μm.

膜厚0.5μ以下では加熱加圧時の加圧力を著しく大き
くしないと所期の接着力が得られず経済的でない。また
膜厚10μ以上では接着力の飛躍的向上が望めず、経済
的でないこと及びブロッキングし易くなるためである。
If the film thickness is less than 0.5 μm, the desired adhesive force cannot be obtained unless the pressure applied during heating and pressing is significantly increased, which is not economical. Further, if the film thickness is 10 μm or more, a dramatic improvement in adhesive strength cannot be expected, and this is because it is not economical and tends to cause blocking.

焼付板温は到達板温で150〜450″Cが望ましい。The final baking plate temperature is preferably 150 to 450''C.

150℃以下では焼不足となりブロッキングし易く耐食
性も低下する。450℃以上では境遇ぎとなり良好な接
着強度が得られず耐食性も低下する。
If it is below 150°C, it will be insufficiently sintered, easily blocking, and corrosion resistance will also decrease. At 450° C. or higher, a situation occurs in which good adhesive strength cannot be obtained and corrosion resistance also decreases.

〈実施例〉 以下本発明の実施例を比較例と共に説明する。<Example> Examples of the present invention will be described below along with comparative examples.

実施例1 被膜Tg 114℃のアクリル樹脂エマルジョンの樹脂
100重量部を下記のように合成した。
Example 1 100 parts by weight of an acrylic resin emulsion resin having a coating Tg of 114° C. was synthesized as follows.

メタクリル酸エチルモノマー、メタクリル酸エチルモノ
マー、アクリルアミドモノマーに水とエマール10〔花
王■の登録商標〕アニオン活性剤と過硫酸カリとを加え
、フラスコ中で上記混合物を70℃に加熱保持し、6時
間後に収率99.5%の安定な樹脂エマルジョンを得た
Water, Emal 10 (registered trademark of Kao ■) anion activator, and potassium persulfate were added to ethyl methacrylate monomer, ethyl methacrylate monomer, and acrylamide monomer, and the mixture was heated and maintained at 70°C in a flask for 6 hours. A stable resin emulsion with a yield of 99.5% was subsequently obtained.

被119 T g 97 ”Cのエポキシ樹脂エマルジ
ョンの樹脂80!INI部を下記のように合成した。
Resin 80!INI portion of the 119 T g 97 ''C epoxy resin emulsion was synthesized as follows.

ビスフェノールA−エピクロヒドリンmJIL パルミ
チン酸ソルビタンのポリエチレングリコールエーテル、
5%ポリビニルアルコール水溶液に水を加え、フラスコ
中で上記混合物を混合し、エマルジョンとした。
Bisphenol A-Epichlorohydrin mJIL Polyethylene glycol ether of sorbitan palmitate,
Water was added to a 5% polyvinyl alcohol aqueous solution, and the above mixture was mixed in a flask to form an emulsion.

これらに硬化剤としてジアミノソフェニルスルホン化合
物のアンモニウム塩を13重量部後添加した。これはエ
ポキシ樹脂の化学量論的添加量の適正量に対する増減は
+18%である。
To these, 13 parts by weight of an ammonium salt of a diaminosophenyl sulfone compound was added as a curing agent. This is an increase/decrease of +18% from the stoichiometric amount of epoxy resin added.

こうして得られた混合液を0.5mm厚のSi 0.1
%。
The mixture thus obtained was coated with 0.5 mm thick Si 0.1
%.

八l 0.05%、 Mn O,1%、  CQ、01
5%を含有する珪素鋼板にロールコータ−で塗布し、引
続き電気炉で到達板温290℃で焼付は膜厚5μのもの
を得・た。
8l 0.05%, MnO, 1%, CQ, 01
It was coated on a silicon steel plate containing 5% with a roll coater, and then baked in an electric furnace at a final plate temperature of 290°C to obtain a film thickness of 5 μm.

比較例1 比較例として実施例1のアクリル樹脂エマルジョンの合
成と同様にして、メタクリル酸エチル。
Comparative Example 1 As a comparative example, ethyl methacrylate was synthesized in the same manner as in the synthesis of the acrylic resin emulsion in Example 1.

アクリル酸エチルを用いて、被1!JTg−2℃のアク
リル酸樹脂エマルシロンを合成し、実施例1と同一素材
を用い同様に塗布、焼付して4.9μの膜厚のものを得
た。
Using ethyl acrylate, coat 1! An acrylic acid resin emulsilon having a temperature of JTg -2°C was synthesized, and using the same material as in Example 1, it was coated and baked in the same manner as in Example 1 to obtain a film having a thickness of 4.9μ.

剪断引張り強度の測定はこれらを打抜き加工後シングル
ラップで積層し、加圧10kg/c+Ilのまま試料を
200℃まで加熱し、放冷した後に行った。
Measurement of shear tensile strength was carried out after punching these samples, stacking them in a single wrap, heating the sample to 200° C. while applying a pressure of 10 kg/c+Il, and allowing it to cool.

その結果実施例では剪断引張り強度156kg/cdと
良好な結果を得た。一方比較例のそれは123kg/c
fであった。なお剪断引張り強度が大きいことは、M、
磁鋼板に用いた場合、磁歪発生による騒音の軽減に大き
な効果がある。
As a result, in the example, a good result was obtained with a shear tensile strength of 156 kg/cd. On the other hand, that of the comparative example is 123 kg/c
It was f. Furthermore, the fact that the shear tensile strength is large means that M,
When used in magnetic steel sheets, it is highly effective in reducing noise caused by magnetostriction.

耐ブロッキング性の測定は上記と同様にシングルラップ
で積層し、加圧200kg/c4のまま試料を80℃2
日間エージングさせた後に放冷し行った。
To measure the blocking resistance, the samples were laminated with a single wrap in the same way as above, and the sample was heated at 80℃2 with a pressure of 200kg/c4.
After aging for one day, it was left to cool.

実施例ではブロッキング強度が7.6kg/cmと実用
上問題ないレベルであったが、比較例では120kg 
/ ctと悪いレベルであった。
In the example, the blocking strength was 7.6 kg/cm, which is a level that does not pose any practical problem, but in the comparative example, it was 120 kg/cm.
/ ct, which was a bad level.

溶接性は、打抜加工後の試料を30nm+積層し、TI
G溶接試験をおこなった。実施例では溶接速度100 
cm/mmまで良好な溶接性を示したが、比較例では2
0cm / mでも?立接ビード中にブローホールが発
生し、溶接性が不良となった。
Weldability was determined by stacking the samples after punching to a thickness of 30 nm + TI
A G welding test was conducted. In the example, the welding speed was 100
cm/mm, but the comparative example showed good weldability up to 2 cm/mm.
Even 0cm/m? A blowhole occurred in the standing bead, resulting in poor weldability.

その他の被膜特性は表1に示したとおりであった。Other coating properties were as shown in Table 1.

表 ■ (1)層間抵抗 JIS第2法 (2)密着性判定  10鰭中屈曲テープ剥離で判定全
く剥離しない:O1 一部剥離:Δ。
Table ■ (1) Interlayer resistance JIS method 2 (2) Adhesion judgment Judging by peeling off the bending tape in the middle of the 10 fins: No peeling at all: O1 Partial peeling: Δ.

完全剥離:× (3)耐 食 性  5ST72時間後発錆面積(%)
で表示 またこれ以外の実施例2〜6.比較例2〜4の結果を表
2に示す、いずれも各種樹脂エマルシロンの合成方法は
実施例1に準じておこなった。
Complete peeling: × (3) Corrosion resistance 5ST 72 hours rust area (%)
Also, other Examples 2 to 6. The results of Comparative Examples 2 to 4 are shown in Table 2. In each case, various resin emulsions were synthesized in accordance with Example 1.

〈発明の効果〉 以上述べたように本発明により加熱接着性に優れた、か
つ従来難しかった耐ブロッキング性及び溶接性も良好な
加熱接着用表面被覆鋼板が製造できるようになった。
<Effects of the Invention> As described above, according to the present invention, it has become possible to produce a surface-coated steel sheet for heat bonding that has excellent heat bonding properties and also has good blocking resistance and weldability, which were difficult to do in the past.

Claims (1)

【特許請求の範囲】[Claims] 鋼板表面に、ガラス転移点(Tg)が55〜150℃の
熱可塑性アクリル樹脂のエマルジョン中の樹脂分100
重量部に対して、ガラス転移点(Tg)が55〜150
℃の熱硬化性エポキシ樹脂のエマルジョン中の樹脂分5
〜120重量部を加え、さらにこれに高温反応型硬化剤
を該エポキシ樹脂の化学量論的添加量の±20%の範囲
で加えた混合液を均一に塗布し、焼付けることを特徴と
する耐ブロッキング性及び溶接性に優れた加熱接着用表
面被覆鋼板の製造方法。
A resin content of 100% in an emulsion of thermoplastic acrylic resin with a glass transition point (Tg) of 55 to 150°C was applied to the surface of the steel plate.
Glass transition point (Tg) is 55 to 150 based on weight part
Resin content in emulsion of thermosetting epoxy resin at ℃5
~120 parts by weight of the epoxy resin is added, and a high-temperature-reactive curing agent is added thereto in a range of ±20% of the stoichiometric amount of the epoxy resin, and a mixed solution is uniformly applied and baked. A method for producing a surface-coated steel plate for heat bonding with excellent blocking resistance and weldability.
JP18701688A 1988-07-28 1988-07-28 Production of surface coated steel plate for thermal adhesion Pending JPH0238042A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18701688A JPH0238042A (en) 1988-07-28 1988-07-28 Production of surface coated steel plate for thermal adhesion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18701688A JPH0238042A (en) 1988-07-28 1988-07-28 Production of surface coated steel plate for thermal adhesion

Publications (1)

Publication Number Publication Date
JPH0238042A true JPH0238042A (en) 1990-02-07

Family

ID=16198725

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18701688A Pending JPH0238042A (en) 1988-07-28 1988-07-28 Production of surface coated steel plate for thermal adhesion

Country Status (1)

Country Link
JP (1) JPH0238042A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05237968A (en) * 1992-01-27 1993-09-17 Nippon Steel Corp Production of adhesive surface coated electromagnetic steel panel
JPWO2021256532A1 (en) * 2020-06-17 2021-12-23
JPWO2021256529A1 (en) * 2020-06-17 2021-12-23
WO2024024834A1 (en) * 2022-07-26 2024-02-01 日本製鉄株式会社 Adhesive resin composition-coated electromagnetic steel sheet and method for manufacturing same
WO2024024835A1 (en) * 2022-07-26 2024-02-01 日本製鉄株式会社 Adhesive resin composition-coated electromagnetic steel sheet and method for producing same

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05237968A (en) * 1992-01-27 1993-09-17 Nippon Steel Corp Production of adhesive surface coated electromagnetic steel panel
JPWO2021256532A1 (en) * 2020-06-17 2021-12-23
WO2021256532A1 (en) * 2020-06-17 2021-12-23 日本製鉄株式会社 Electromagnetic steel sheet, lamianted core, and rotating electric machine
JPWO2021256529A1 (en) * 2020-06-17 2021-12-23
KR20220140636A (en) * 2020-06-17 2022-10-18 닛폰세이테츠 가부시키가이샤 Electronic steel sheet, laminated core and rotating electric machine
US12057248B2 (en) 2020-06-17 2024-08-06 Nippon Steel Corporation Electrical steel sheet, laminated core and rotating electric machine
WO2024024834A1 (en) * 2022-07-26 2024-02-01 日本製鉄株式会社 Adhesive resin composition-coated electromagnetic steel sheet and method for manufacturing same
WO2024024835A1 (en) * 2022-07-26 2024-02-01 日本製鉄株式会社 Adhesive resin composition-coated electromagnetic steel sheet and method for producing same

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