JP2953952B2 - Surface coated electromagnetic steel sheet for heat bonding and method for producing the same - Google Patents

Surface coated electromagnetic steel sheet for heat bonding and method for producing the same

Info

Publication number
JP2953952B2
JP2953952B2 JP10254794A JP10254794A JP2953952B2 JP 2953952 B2 JP2953952 B2 JP 2953952B2 JP 10254794 A JP10254794 A JP 10254794A JP 10254794 A JP10254794 A JP 10254794A JP 2953952 B2 JP2953952 B2 JP 2953952B2
Authority
JP
Japan
Prior art keywords
resin
steel sheet
component
heat bonding
baking
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.)
Expired - Fee Related
Application number
JP10254794A
Other languages
Japanese (ja)
Other versions
JPH07308990A (en
Inventor
口 邦 彦 江
野 茂 高
口 勝 郎 山
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 JP10254794A priority Critical patent/JP2953952B2/en
Publication of JPH07308990A publication Critical patent/JPH07308990A/en
Application granted granted Critical
Publication of JP2953952B2 publication Critical patent/JP2953952B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Application Of Or Painting With Fluid Materials (AREA)
  • Laminated Bodies (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は、打ち抜き、剪断、プレ
ス加工後に加圧および加熱により接着して用いられる表
面被覆電磁鋼板、およびその製造方法に関するものであ
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface-coated electromagnetic steel sheet which is used after being punched, sheared, pressed and bonded by applying pressure and heat, and a method for producing the same.

【0002】[0002]

【従来の技術】加圧および加熱によって接着する表面被
覆電磁鋼板に要求される特性としては、加圧・加熱接着
性、耐ブロッキング性、溶接性、打ち抜き性、剪断性、
プレス加工性および耐食性など数多く挙げられる。これ
らの諸要求を満たすために数多くの研究がなされ、加熱
接着用表面被覆電磁鋼板の被膜組成に関して多くの提案
がなされている。例えば、特公昭49−13318号公
報には、熱可塑性エポキシ樹脂とベンゾグアナミン樹脂
からなる被膜を有する接着用電磁鋼板が、特公昭52−
8998号公報には熱可塑性樹脂と熱硬化性樹脂の混合
樹脂(フェノキシ樹脂とメタノール変性メラミン樹脂の
混合樹脂、フェノキシ樹脂とベンゾグアナミン樹脂の混
合樹脂、フェノキシ樹脂、フェノール樹脂およびメラミ
ン樹脂からなる混合樹脂)からなる被膜を有する接着用
表面被覆電磁鋼板が、特開平2−38042号公報には
熱可塑性アクリル樹脂、熱硬化性エポキシ樹脂およびエ
ポキシ樹脂硬化剤からなる被膜を有する加熱接着用表面
被覆鋼板が開示されている。
2. Description of the Related Art The characteristics required for a surface-coated electromagnetic steel sheet to be bonded by pressing and heating include pressure / heat bonding, blocking resistance, welding, punching, shearing, and the like.
Numerous examples include press workability and corrosion resistance. Numerous studies have been made to satisfy these requirements, and many proposals have been made regarding the coating composition of surface-coated electrical steel sheets for heat bonding. For example, Japanese Patent Publication No. 49-13318 discloses an adhesive magnetic steel sheet having a coating made of a thermoplastic epoxy resin and a benzoguanamine resin.
No. 8998 discloses a mixed resin of a thermoplastic resin and a thermosetting resin (a mixed resin of a phenoxy resin and a methanol-modified melamine resin, a mixed resin of a phenoxy resin and a benzoguanamine resin, a mixed resin of a phenoxy resin, a phenol resin and a melamine resin). JP-A-2-38042 discloses a surface-coated electromagnetic steel sheet having a coating composed of a thermoplastic acrylic resin, a thermosetting epoxy resin, and an epoxy resin curing agent. Have been.

【0003】[0003]

【発明が解決しようとする課題】しかしながら、上述し
た方法で得られる接着用表面被覆電磁鋼板は、加圧加熱
接着後の常温における接着強度は良好なものの、高温下
の接着強度は必ずしも十分とはいえないものであった。
あるいは、十分な高温接着強度を得るために、接着時間
を長時間必要とする、もしくは接着後に熱処理する必要
があるなど、作業性に劣るものであった。具体的には、
特公昭49−13318号公報に開示された被覆では、
実施例から明らかなように、130℃での接着強度が1
8kg/cm2 であり、しかも接着するために130℃
で24時間の加圧積層時間を要していた。また、特公昭
52−8998号公報では、十分な耐熱接着強度を得る
ために200℃で3時間の加圧積層時間を要していた。
さらに、特開平2−38042号公報に開示される被膜
では、高温における接着強度が実施例中に記載されてい
ないが、本発明者らが追試したところでは130℃以上
の高温における接着強度が低水準であった。
However, the surface-coated electromagnetic steel sheet for bonding obtained by the above-described method has good bonding strength at room temperature after bonding under pressure and heat, but does not always have sufficient bonding strength at high temperatures. It couldn't be said.
Alternatively, in order to obtain a sufficient high-temperature adhesive strength, the workability is poor, such as requiring a long bonding time or a heat treatment after the bonding. In particular,
In the coating disclosed in Japanese Patent Publication No. 49-13318,
As is clear from the examples, the adhesive strength at 130 ° C. is 1
8 kg / cm 2 and 130 ° C. for bonding
Required a pressure lamination time of 24 hours. In Japanese Patent Publication No. 52-8998, a pressure lamination time of 3 hours at 200 ° C. was required to obtain a sufficient heat-resistant adhesive strength.
Further, in the coating disclosed in JP-A-2-38042, the adhesive strength at a high temperature is not described in the examples, but the inventors have performed additional tests and found that the adhesive strength at a high temperature of 130 ° C. or higher is low. It was standard.

【0004】本発明の目的は、トランスやモーターなど
の鉄心として用いられ、表面被膜を絶縁被膜として使用
する電磁鋼板を製造するにあたり、積層接着後に150
℃程度の高温環境下に晒された場合においても十分な接
着強度を発現し、かつ、この接着特性を短時間(1分程
度)の積層接着時間で達成し、作業性をも改善すること
にある。さらに、耐ブロッキング性など接着用表面被覆
電磁鋼板に要求される他の特性をも同時に満足する加熱
接着用表面被覆電磁鋼板およびその製造方法を提供する
ことを目的とする。
An object of the present invention is to manufacture an electromagnetic steel sheet which is used as an iron core of a transformer or a motor and uses a surface film as an insulating film.
In order to achieve sufficient adhesive strength even when exposed to a high temperature environment of about ℃, and to achieve this adhesive property in a short time (about 1 minute) for lamination, and to improve workability. is there. It is still another object of the present invention to provide a surface-coated electromagnetic steel sheet for heat bonding which simultaneously satisfies other properties required for the surface coated electromagnetic steel sheet for adhesion, such as blocking resistance, and a method for producing the same.

【0005】[0005]

【課題を解決するための手段】すなわち、上記目的を達
成するために、本発明は、(A)ガラス転移点が80〜
130℃で、分子中にエポキシ基と反応可能な官能基を
含有するアクリル樹脂、および(B)融点あるいは軟化
点が70〜140℃のエポキシ樹脂を主成分とし、前記
(A)成分と前記(B)成分の樹脂固形分重量比が95
/5〜70/30である混合樹脂被膜を有し、該混合樹
脂のゲル化率(硬化度)が10〜90重量%の範囲であ
ることを特徴とする加熱接着用表面被覆電磁鋼板を提供
する。また、前記(A)成分と前記(B)成分の樹脂固
形分重量比が95/5〜70/30である水系混合液を
塗布し、前記(A)成分と前記(B)成分との反応が焼
付後の被膜のゲル化率(硬化度)が10〜90wt%の
範囲になるように到達板温が150〜350℃の範囲内
で焼き付けることを特徴とする加熱接着用表面被覆電磁
鋼板の製造方法を提供するものである。
That is, in order to achieve the above object, the present invention provides (A) a glass transition point of 80 to
An acrylic resin having a functional group capable of reacting with an epoxy group in a molecule at 130 ° C. and (B) an epoxy resin having a melting point or a softening point of 70 to 140 ° C. as main components. B) The resin solid content weight ratio of the component is 95.
A surface-coated electrical steel sheet for heat bonding, having a mixed resin coating of / 5 to 70/30 and having a gelation rate (curing degree) of the mixed resin in a range of 10 to 90% by weight. I do. Further, an aqueous mixed solution in which the resin solid content weight ratio of the component (A) and the component (B) is 95/5 to 70/30 is applied, and the reaction between the component (A) and the component (B) is performed. Is baked at a sheet temperature of 150 to 350 ° C. so that the gelation rate (hardening degree) of the film after baking is in the range of 10 to 90 wt%. It is intended to provide a manufacturing method.

【0006】ここで、(A)成分であるアクリルエマル
ジョン樹脂がアクリル酸またはメタクリル酸を原料モノ
マーの一つであり、焼付後の被膜の乾燥膜厚は0.5〜
10μmであるのが好ましい。
Here, the acrylic emulsion resin as the component (A) uses acrylic acid or methacrylic acid as one of the raw material monomers, and the dried film thickness of the film after baking is from 0.5 to 0.5%.
It is preferably 10 μm.

【0007】[0007]

【作用】以下に本発明をさらに詳細に説明する。本発明
において用いる基板は電磁鋼板である。この電磁鋼板に
は予め絶縁被覆が施されていてもよい。なお、本発明に
用いる基板として電磁鋼板以外にも軟鋼板、ステンレス
鋼板ならびに、特殊鋼板の熱間圧延および冷間圧延板の
いずれを使用しても、すなわち基地鋼板を特に限定しな
くても、本発明の効果を得ることができる。またこれら
の鋼板表面にZn,Ni,SnまたはCrなどの金属め
っきやZn−Ni,Zn−FeまたはZn−Cu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およびボンデなど
の化成処理が施されていても良い。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。本発明に
おいては、この電磁鋼板の少なくとも一方の表面に下記
組成の樹脂液を塗布し、これを焼き付けて表面被覆を形
成する。
The present invention will be described below in more detail. The substrate used in the present invention is an electromagnetic steel sheet. This electromagnetic steel sheet may be provided with an insulating coating in advance. In addition, as a substrate used in the present invention, in addition to a magnetic steel sheet, a mild steel sheet, a stainless steel sheet, and using any of a hot-rolled and a cold-rolled sheet of a special steel sheet, that is, without particularly limiting the base steel sheet, The effects of the present invention can be obtained. Further, the surface of these steel plates may be coated with metal plating such as Zn, Ni, Sn or Cr, or a metal alloy plating such as Zn-Ni, Zn-Fe or Zn-Cu. May be subjected to a chemical conversion treatment such as chromate and bond. As described above, the presence or absence of the coating on the steel sheet surface is not particularly limited. In the present invention, a resin solution having the following composition is applied to at least one surface of the magnetic steel sheet and baked to form a surface coating.

【0008】まず、本発明で用いる水系樹脂混合液につ
いて説明する。 (A)成分であるアクリルエマルジョン樹脂は、後述す
るエポキシエマルジョン樹脂中のエポキシ基と反応する
官能基を分子中に有することが必須である。この官能基
としては−OH、−COOH、>NH、−NH2 、等が
例示される。具体例としては、アクリル酸のアルキルエ
ステルモノマー、メタクリル酸のアルキルエステルモノ
マー、スチレンモノマーなどの非官能性モノマーと、ア
クリル酸、メタクリル酸、メタクリル酸ヒドロキシエチ
ル、メタクリル酸ヒドロキシプロピル、メタクリル酸第
三ブチリアミノエチル、アクリルアマイド、メタクリル
アマイドなどの官能性モノマーとのモノマー混合物を、
得られるアクリル樹脂のガラス転移点が80〜130、
好ましくは90〜120℃の範囲内になるように適宜組
み合わせて、通常の乳化重合法によって得ることができ
る。官能性モノマーとして特に好適なものは、アクリル
酸およびメタクリル酸である。
First, the aqueous resin mixture used in the present invention will be described. It is essential that the acrylic emulsion resin as the component (A) has a functional group in the molecule that reacts with an epoxy group in the epoxy emulsion resin described later. As the functional group -OH, -COOH,> NH, -NH 2, etc. are exemplified. Specific examples include alkyl ester monomers of acrylic acid, alkyl ester monomers of methacrylic acid, non-functional monomers such as styrene monomers, acrylic acid, methacrylic acid, hydroxyethyl methacrylate, hydroxypropyl methacrylate, tert-butyl methacrylate. A monomer mixture with a functional monomer such as aminoethyl, acrylamide, methacrylamide,
The glass transition point of the obtained acrylic resin is 80 to 130,
Preferably, it can be obtained by a usual emulsion polymerization method by appropriately combining them so as to be within a range of 90 to 120 ° C. Particularly preferred as functional monomers are acrylic acid and methacrylic acid.

【0009】なお、アクリル樹脂のガラス転移点が80
℃未満の場合には、得られる表面塗膜に粘着性が残り、
被覆鋼板をコイルとして巻き取る場合や積み重ねる場合
などにブロッキング現象が起きやすくなり、それに起因
して塗膜が損傷することがあるので好ましくない。一
方、ガラス転移点が130℃超の場合には、必然的に溶
融、軟化する温度が高くなることから、焼き付け温度を
高く設定する必要を生じ、積層接着温度の高温化をも必
要とするため作業性を低下させることがある。また、得
られる被膜が脆性化し常温における接着強度を低下させ
ることがある。エポキシ基と反応する官能性モノマーの
含有量は、アクリル樹脂中の3〜20wt%、好ましく
は4〜10wt%が好適である。3%未満の場合は、エ
ポキシ基との反応が不十分となり、高温における接着強
度が低水準となることがある。20%超の場合は、エマ
ルジョンが高粘度化するなど安定性が低下することがあ
る。
The glass transition point of the acrylic resin is 80
If the temperature is lower than ℃, the resulting surface coating remains tacky,
When the coated steel sheet is wound up as a coil or stacked, a blocking phenomenon is likely to occur, which may damage the coating film, which is not preferable. On the other hand, when the glass transition point is higher than 130 ° C., since the melting and softening temperature is inevitably high, it is necessary to set the baking temperature high, and it is also necessary to increase the lamination bonding temperature. Workability may be reduced. In addition, the resulting coating may become brittle and reduce the adhesive strength at room temperature. The content of the functional monomer that reacts with the epoxy group is 3 to 20% by weight, preferably 4 to 10% by weight in the acrylic resin. If it is less than 3%, the reaction with the epoxy group becomes insufficient, and the adhesive strength at high temperatures may be low. If it is more than 20%, the stability may be lowered, for example, the viscosity of the emulsion may be increased.

【0010】(B)成分であるエポキシエマルジョン樹
脂は、1分子中に2個以上のエポキシ基を含有し、融点
あるいは軟化点が70〜140、好ましくは80〜13
0℃のものが使用できる。融点あるいは軟化点が70℃
未満の場合にはブロッキング現象が起きやすくなるほ
か、高温における接着強度が低水準となる。140℃超
の場合には、成膜性が不良となったり接着強度が低下す
ることがある。エポキシ樹脂としては、例えば、ビスフ
ェノールA型、ハロゲン化ビスフェノールA型、ノボラ
ック型、ポリグリコール型、ビスフェノールF型などが
挙げられる。エポキシ樹脂は、エポキシ当量が約400
〜3000、さらには800〜2000のものが好まし
い。エポキシエマルジョン樹脂は、これらのエポキシ樹
脂を乳化剤の存在下で通常の強制乳化法により水系エマ
ルジョンとして製造することができる。強制乳化法にお
いて使用する乳化剤としては、ポリオキシエチレンアル
キルフェノールエーテル系ノニオン界面活性剤、ポリオ
キシエチレンポリオキシプロピレンブロックポリエーテ
ル類あるいはこれらとジイソシアネート化合物との付加
物を単独もしくはブレンドして使用するのが望ましい。
The epoxy emulsion resin as the component (B) contains two or more epoxy groups in one molecule and has a melting point or softening point of 70 to 140, preferably 80 to 13
One at 0 ° C can be used. 70 ° C melting point or softening point
If it is less than 3, the blocking phenomenon is likely to occur, and the adhesive strength at a high temperature is low. If the temperature is higher than 140 ° C., the film formability may be poor or the adhesive strength may be reduced. Examples of the epoxy resin include bisphenol A type, halogenated bisphenol A type, novolak type, polyglycol type, and bisphenol F type. The epoxy resin has an epoxy equivalent of about 400
-3000, more preferably 800-2000. The epoxy emulsion resin can be produced as an aqueous emulsion by a usual forced emulsification method in the presence of an emulsifier. As the emulsifier used in the forced emulsification method, a polyoxyethylene alkylphenol ether-based nonionic surfactant, a polyoxyethylene polyoxypropylene block polyether or an adduct thereof with a diisocyanate compound may be used alone or as a blend. desirable.

【0011】本発明で使用する被覆成分は、以上の
(A)および(B)成分を含むことを必須とするが、さ
らに必要に応じて、成膜助剤や絶縁性を有する着色顔
料、体質顔料、防錆顔料あるいは消泡剤、表面調整剤、
増粘剤、顔料分散剤、防腐剤などの各種添加剤を配合し
たものであってもよい。各成分単独あるいは成分間の架
橋反応を促進するために、他の架橋剤や反応触媒を添加
してもよい。さらに、樹脂の改質を目的に他の水性樹脂
の混合や共重合など当業界の公知技術を併用してもよ
い。
It is essential that the coating component used in the present invention contains the above-mentioned components (A) and (B), and if necessary, a film-forming aid, a colored pigment having an insulating property, Pigments, antirust pigments or defoamers, surface conditioners,
What mixed various additives, such as a thickener, a pigment dispersing agent, and a preservative, may be used. Other cross-linking agents or reaction catalysts may be added in order to promote the cross-linking reaction alone or between the components. Further, a technique known in the art such as mixing or copolymerization of another aqueous resin may be used in combination for the purpose of modifying the resin.

【0012】上記の成分(A)、(B)は、それぞれ単
独でもあるいは同種の成分を複数用いたものであっても
よい。なお、成分(A)、(B)の混合比は、それぞれ
の樹脂固形分重量比が、(A)/(B)=〔(70)/
(30)〕〜〔(95)/(5)〕、好ましくは〔(8
0)/(20)〕〜〔(90)/(10)〕の範囲とす
る。混合比が前記範囲外の場合には、接着強度が低水準
となる。また、(A)、(B)成分のそれぞれの樹脂固
形分は、塗装作業性などの観点から、混合液中、20〜
60さらには30〜55重量%の割合であることが好ま
しい。
The above components (A) and (B) may be used alone or in combination of a plurality of components of the same type. The mixing ratio of the components (A) and (B) is such that each resin solid content weight ratio is (A) / (B) = [(70) /
(30)] to [(95) / (5)], preferably [(8
0) / (20)] to [(90) / (10)]. If the mixing ratio is outside the above range, the adhesive strength will be low. Further, the resin solid content of each of the components (A) and (B) is preferably 20 to 20 in the mixed solution from the viewpoint of coating workability and the like.
Preferably, the proportion is 60%, more preferably 30 to 55% by weight.

【0013】混合液を塗布する方法としては、ロールコ
ーター、カーテンフローコーター、スプレー塗装、スク
イズコーターなどの塗布方法が利用でき、特に限定され
ない。混合液の焼き付け方法としては、熱風乾燥炉、誘
導加熱炉、抵抗加熱炉などの公知の焼き付け炉が利用で
き、特に限定されない。
As a method for applying the mixed liquid, a coating method such as a roll coater, a curtain flow coater, a spray coating or a squeeze coater can be used, and is not particularly limited. As a method of baking the mixed solution, a known baking furnace such as a hot-air drying furnace, an induction heating furnace, or a resistance heating furnace can be used, and is not particularly limited.

【0014】混合液の塗布、焼き付け後の被膜の乾燥膜
厚は、0.5〜10、さらには3〜8μmが望ましい。
膜厚が0.5μm未満の場合には、接着強度が未達(被
膜構成材料の本来の値まで達しない)となることがあ
り、また、膜厚が10μm超の場合には、接着強度が飽
和することにより非経済的となるほか、ブロッキングし
やすくなるなどの問題を生じることがある。
The dry film thickness of the film after application and baking of the mixed solution is preferably 0.5 to 10, more preferably 3 to 8 μm.
When the film thickness is less than 0.5 μm, the adhesive strength may not be reached (not reach the original value of the material constituting the film), and when the film thickness is more than 10 μm, the adhesive strength may not be attained. Saturation can be uneconomical and can cause problems such as easy blocking.

【0015】焼き付け温度は到達板温で150〜35
0、さらには、180〜280℃が望ましい。150℃
未満では、水性媒体の乾燥が不十分となって接着時にふ
くれを生じたり、成分(A)、(B)間の架橋反応が不
十分となる(ゲル化率が10wt%未満)ことによっ
て、最終的な架橋反応率の到達度が低く、接着強度の未
達を招くことがある。350℃超の場合には、焼き付け
時に架橋反応がほぼ完結してしまい(ゲル化率が90w
t%超)、積層接着時にはもはや溶融せず、接着しなく
なることがある。焼き付け後の被膜のゲル化率の好適な
範囲は20〜85wt%、さらに好ましくは30〜70
wt%である。本発明の製造方法によって得られた加熱
接着用表面被覆電磁鋼板を所定量積層して接着するに
は、到達板温150〜350℃好ましくは180〜30
0℃で、圧力2〜100kg/cm2 とし、0.5〜1
0分で充分な接着性が得られる。
[0015] The baking temperature is 150 to 35 in the ultimate plate temperature.
0, more preferably 180 to 280 ° C. 150 ° C
If it is less than 1, the aqueous medium is insufficiently dried to cause blistering at the time of bonding, or the crosslinking reaction between the components (A) and (B) becomes insufficient (gelation rate is less than 10 wt%), so that the final The degree of successful cross-linking reaction rate is low, which may lead to insufficient adhesion strength. When the temperature is higher than 350 ° C., the crosslinking reaction is almost completed at the time of baking (gelation rate is 90 watts).
t%), does not melt at the time of lamination bonding, and may not be bonded. The preferred range of the gelation ratio of the film after baking is 20 to 85% by weight, more preferably 30 to 70% by weight.
wt%. For laminating and bonding a predetermined amount of the surface-coated electromagnetic steel sheet for heat bonding obtained by the production method of the present invention, a reached plate temperature of 150 to 350 ° C., preferably 180 to 30 ° C.
At 0 ° C., the pressure is 2 to 100 kg / cm 2, and 0.5 to 1
Sufficient adhesiveness can be obtained in 0 minutes.

【0016】[0016]

【実施例】次に、本発明を実施例に基づいて具体的に説
明する。 (実施例1)2枚の電磁鋼板(板厚0.5mm、表面粗
さRa0.18μm)の各接着面に、表1に示す混合物
をロールコーターで塗布し、表2中に記載した到達板温
になるように熱風乾燥炉で60秒間焼き付け、乾燥後の
膜厚を5.0μmとした。剪断接着強度測定用の積層接
着電磁鋼板は、被膜を形成した電磁鋼板の接着面同士を
重ね合わせ、加圧10kg/cm2 で表2中に記載した
加熱温度、加圧時間でプレス接着して作製した。剪断接
着強度の測定は、得られた積層接着電磁鋼板をすぐに2
3℃および150℃の温度下で行なった。剪断接着強度
の測定結果を表2に示す。また、ブロッキング性の評価
として、被膜を形成した電磁鋼板の接着面同士を重ね合
わせ、加圧200kg/cm2 のまま、80℃2日間エ
ージングさせた後の23℃下の剪断接着強度(ブロッキ
ング試験後剪断接着強度)を測定した。結果を表2に示
す。また、発明例2において乾燥後の膜厚を変化させた
場合の剪断接着強度を測定した。結果を表3に示す。
Next, the present invention will be specifically described based on examples. (Example 1) The mixture shown in Table 1 was applied to each bonding surface of two electromagnetic steel sheets (sheet thickness 0.5 mm, surface roughness Ra 0.18 μm) using a roll coater. The film was baked in a hot air drying oven for 60 seconds so as to become warm, and the film thickness after drying was adjusted to 5.0 μm. The laminated adhesive electromagnetic steel sheet for measuring the shear adhesive strength was prepared by laminating the adhesive surfaces of the electromagnetic steel sheets having the coatings formed thereon, and press-bonding with a pressure of 10 kg / cm 2 at a heating temperature and a pressing time described in Table 2. Produced. The measurement of the shear adhesive strength was carried out by immediately applying the obtained laminated adhesive electromagnetic steel sheet to 2
The test was performed at a temperature of 3 ° C. and 150 ° C. Table 2 shows the measurement results of the shear adhesive strength. In addition, as an evaluation of the blocking property, the adhesive surfaces of the magnetic steel sheets on which the coatings were formed were overlapped with each other and aged at 80 ° C. for 2 days while maintaining the pressure at 200 kg / cm 2 , and the shear adhesive strength at 23 ° C. (blocking test) Post-shear adhesive strength). Table 2 shows the results. In addition, the shear adhesive strength when the film thickness after drying was changed in Invention Example 2 was measured. Table 3 shows the results.

【0017】また、焼き付け後および積層接着後の被膜
の硬化度をゲル化率によって評価した。ゲル化率は、焼
き付け後の被覆鋼板あるいは積層接着後に剥離させた被
覆鋼板をソックスレー抽出器により、メチルエチルケト
ンを用いて2時間抽出を行なった後の残量から算出し
た。結果を表2に示す。なお、発明例1の被膜の焼き付
け前のゲル化率は0wt%、200℃で1時間焼き付け
し、完全に硬化させた場合には98wt%となり、ゲル
化率の算出法が概ね硬化度に対応していることが確認さ
れた。 ゲル化率=(抽出後の被膜残重量/抽出前の被膜重量)
×100(wt%)
The degree of cure of the coating after baking and after lamination was evaluated by the gelation rate. The gelation ratio was calculated from the remaining amount after extracting the coated steel sheet after baking or the coated steel sheet peeled off after laminating with methyl ethyl ketone for 2 hours using a Soxhlet extractor. Table 2 shows the results. The gelation ratio of the coating of Invention Example 1 before baking was 0 wt%, and when baked at 200 ° C. for 1 hour and completely cured, it was 98 wt%, and the method of calculating the gelation ratio generally corresponds to the degree of curing. It was confirmed that. Gelation rate = (residual weight of coating after extraction / weight of coating before extraction)
× 100 (wt%)

【0018】[0018]

【表1】 [Table 1]

【0019】[0019]

【表2】 [Table 2]

【0020】[0020]

【表3】 [Table 3]

【0021】 [0021]

【0022】[0022]

【発明の効果】表2の結果から明らかなように、本発明
の加熱接着用表面被覆電磁鋼板の剪断接着強度は、樹脂
成分(A)と樹脂成分(B)の架橋反応に起因して、常
温および高温において高水準なものとなる。また、耐ブ
ロッキング性にも優れる。さらに高接着強度が短時間の
積層接着時間で達成されている。樹脂成分(A)と樹脂
成分(B)の混合比が70/30〜95/5の範囲内で
接着強度が極大となる。また、焼き付け後の被膜のゲル
化率がおよそ10〜90%の範囲内で高い接着強度が得
られる。さらに、表3から明らかなように、乾燥後の膜
厚が、およそ0.5〜10μmの範囲内で高い接着強度
と耐ブロッキング性が達成される。なお、焼き付け温度
の高温化および加熱積層接着時間の長時間化によって、
高温下での接着強度が増大していることから、積層接着
前の樹脂成分は、まだ架橋反応(ゲル化率)が不完全な
状態であることがわかる。
As is clear from the results in Table 2, the shear adhesive strength of the surface-coated electrical steel sheet for heat bonding of the present invention is due to the crosslinking reaction between the resin component (A) and the resin component (B). It is high at normal and high temperatures. Also, it has excellent blocking resistance. Further, high adhesive strength is achieved with a short lamination time. When the mixing ratio of the resin component (A) and the resin component (B) is in the range of 70/30 to 95/5, the adhesive strength is maximized. Further, high adhesive strength can be obtained when the gelation rate of the film after baking is in the range of about 10 to 90%. Furthermore, as is clear from Table 3, high adhesive strength and blocking resistance are achieved when the film thickness after drying is in the range of about 0.5 to 10 μm. In addition, by raising the baking temperature and prolonging the heating lamination time,
Since the adhesive strength at high temperature has been increased, it can be seen that the resin component before lamination and adhesion is still in an incomplete cross-linking reaction (gelation rate).

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 FI B05D 7/24 302 B05D 7/24 302U (56)参考文献 特開 平2−208034(JP,A) (58)調査した分野(Int.Cl.6,DB名) B32B 15/08 B05D 3/00 B05D 3/02 B05D 7/14 B05D 7/24 ────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. 6 Identification symbol FI B05D 7/24 302 B05D 7/24 302U (56) References JP-A-2-208034 (JP, A) (58) Fields surveyed (Int.Cl. 6 , DB name) B32B 15/08 B05D 3/00 B05D 3/02 B05D 7/14 B05D 7/24

Claims (6)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】電磁鋼板の少なくとも一方の表面に、
(A)ガラス転移点が80〜130℃で、分子中にエポ
キシ基と反応可能な官能基を含有するアクリル樹脂、お
よび(B)融点あるいは軟化点が70〜140℃のエポ
キシ樹脂を主成分とし、前記(A)成分と前記(B)成
分の樹脂固形分重量比が95/5〜70/30である混
合樹脂被膜を有し、該混合樹脂のゲル化率(硬化度)が
10〜90重量%の範囲であることを特徴とする加熱接
着用表面被覆電磁鋼板。
(1) At least one surface of an electromagnetic steel sheet,
The main components are (A) an acrylic resin having a glass transition point of 80 to 130 ° C. and containing a functional group capable of reacting with an epoxy group in the molecule, and (B) an epoxy resin having a melting point or softening point of 70 to 140 ° C. And a mixed resin coating in which the weight ratio of the resin solids of the component (A) and the component (B) is 95/5 to 70/30, and the gelation ratio (curing degree) of the mixed resin is 10 to 90. A surface-coated electrical steel sheet for heat bonding, which is in the range of% by weight.
【請求項2】前記(A)成分であるアクリルエマルジョ
ン樹脂の原料モノマーの少なくとも一つがアクリル酸ま
たはメタクリル酸である請求項1に記載の加熱接着用表
面被覆電磁鋼板。
2. The surface-coated magnetic steel sheet for heat bonding according to claim 1, wherein at least one of the raw material monomers of the acrylic emulsion resin as the component (A) is acrylic acid or methacrylic acid.
【請求項3】焼付け後の前記被膜の乾燥膜厚が0.5〜
10μmである請求項1または2に記載の加熱接着用表
面被覆電磁鋼板。
3. A film having a dry thickness of 0.5 to 0.5 after baking.
The surface-coated electrical steel sheet for heat bonding according to claim 1 or 2, which has a thickness of 10 µm.
【請求項4】電磁鋼板の少なくとも一方の表面に、 (A)ガラス転移点が80〜130℃で、分子中に、エ
ポキシ基と反応可能な官能基を含有するアクリルエマル
ジョン樹脂、および (B)融点あるいは軟化点が70〜140℃のエポキシ
エマルジョン樹脂を主成分とし、前記(A)成分と前記
(B)成分の樹脂固形分重量比が95/5〜70/30
である水系混合液を塗布し、被膜を形成し、該被膜の焼
付後のゲル化率(硬化度)が10〜90wt%の範囲に
なるように到達板温が150〜350℃の範囲内で焼き
付けることを特徴とする加熱接着用表面被覆電磁鋼板の
製造方法。
4. An at least one surface of an electromagnetic steel sheet, comprising: (A) an acrylic emulsion resin having a glass transition point of 80 to 130 ° C. and containing a functional group capable of reacting with an epoxy group in a molecule; and (B) An epoxy emulsion resin having a melting point or softening point of 70 to 140 ° C. as a main component, and a resin solid content ratio of the component (A) to the component (B) of 95/5 to 70/30.
An aqueous mixed solution is applied to form a coating film, and the ultimate plate temperature is in the range of 150 to 350 ° C. so that the gelation rate (hardening degree) of the coating after baking is in the range of 10 to 90 wt%. A method for producing a surface-coated electrical steel sheet for heat bonding, characterized by baking.
【請求項5】前記(A)成分であるアクリルエマルジョ
ン樹脂の原料モノマーの少なくとも一つがアクリル酸ま
たはメタクリル酸である請求項4に記載の加熱接着用表
面被覆電磁鋼板の製造方法。
5. The method according to claim 4, wherein at least one of the raw material monomers of the acrylic emulsion resin as the component (A) is acrylic acid or methacrylic acid.
【請求項6】前記焼付後の被膜の乾燥膜厚が、0.5〜
10μmである請求項4または5に記載の加熱接着用表
面被覆電磁鋼板の製造方法。
6. The dried film thickness of the film after baking is 0.5 to 0.5.
The method for producing a surface-coated electrical steel sheet for heat bonding according to claim 4 or 5, wherein the thickness is 10 µm.
JP10254794A 1994-05-17 1994-05-17 Surface coated electromagnetic steel sheet for heat bonding and method for producing the same Expired - Fee Related JP2953952B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10254794A JP2953952B2 (en) 1994-05-17 1994-05-17 Surface coated electromagnetic steel sheet for heat bonding and method for producing the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10254794A JP2953952B2 (en) 1994-05-17 1994-05-17 Surface coated electromagnetic steel sheet for heat bonding and method for producing the same

Publications (2)

Publication Number Publication Date
JPH07308990A JPH07308990A (en) 1995-11-28
JP2953952B2 true JP2953952B2 (en) 1999-09-27

Family

ID=14330281

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10254794A Expired - Fee Related JP2953952B2 (en) 1994-05-17 1994-05-17 Surface coated electromagnetic steel sheet for heat bonding and method for producing the same

Country Status (1)

Country Link
JP (1) JP2953952B2 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4581228B2 (en) * 2000-11-14 2010-11-17 Jfeスチール株式会社 Laminated electrical steel sheet with excellent workability
KR100500542B1 (en) * 2001-12-26 2005-07-12 주식회사 인트켐 Composition of Electromagnetic Interference/Radio-Frequency Interference shielding coatings
JP4143090B2 (en) * 2003-02-03 2008-09-03 新日本製鐵株式会社 Surface coated electrical steel sheet for bonding
IN2012DN02839A (en) 2009-09-15 2015-07-24 Nippon Steel & Sumitomo Metal Corp
JP5762140B2 (en) * 2010-07-23 2015-08-12 ダンロップスポーツ株式会社 Golf ball
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

Also Published As

Publication number Publication date
JPH07308990A (en) 1995-11-28

Similar Documents

Publication Publication Date Title
JP3369941B2 (en) Manufacturing method of electrical steel sheet for bonded iron core with excellent adhesive strength, corrosion resistance and blocking resistance
KR102490495B1 (en) Water-based eco-friendly self-adhesive insulating coating for silicon steel
JP2953952B2 (en) Surface coated electromagnetic steel sheet for heat bonding and method for producing the same
JP2937734B2 (en) Method for producing surface-coated electrical steel sheet for heat bonding
JP3312589B2 (en) Manufacturing method of electrical steel sheet for bonded iron core with excellent adhesive strength, corrosion resistance and blocking resistance
JP3732971B2 (en) Manufacturing method of electrical steel sheet for adhesive iron core with excellent shear strength and peel strength
JP3369940B2 (en) Manufacturing method of electrical steel sheet for bonded iron core with excellent adhesive strength, corrosion resistance and blocking resistance
JPH02208034A (en) Preparation of laminated iron core
JP3312590B2 (en) Manufacturing method of electrical steel sheet for bonded iron core with excellent adhesive strength, corrosion resistance and blocking resistance
JP3398446B2 (en) One-part curable aqueous emulsion composition
JP3613809B2 (en) Method for producing surface-coated electrical steel sheet for heat bonding
JPS58198513A (en) Production of aqueous dispersion composition
JP2000173816A (en) Surface covered electromagnetic steel sheet for sticking and its manufacture
JP2613726B2 (en) Manufacturing method of surface coated electrical steel sheet for bonding
JP2613725B2 (en) Manufacturing method of surface coated electrical steel sheet for bonding
JP3369939B2 (en) Manufacturing method of electrical steel sheet for bonded iron core with excellent adhesive strength, corrosion resistance and blocking resistance
WO1992012006A1 (en) Damping composite metal plate and production thereof
JPS61204288A (en) Adhesive composition for flexible printing circuit base plate
JP2529053B2 (en) Manufacturing method of surface coated electrical steel sheet for bonding
JP2735988B2 (en) Surface-coated electrical steel sheet for bonding excellent in high-temperature bonding strength and method for producing the same
EP1568724A1 (en) Process for the production of electrical steel sheet cores
JPH07242714A (en) Water-based resin dispersion
JP2922419B2 (en) Electrical steel sheet with insulating coating that has good coating stability and excellent weldability and punchability
JP2566086B2 (en) Method for manufacturing resin composite type vibration damping metal plate
JPH0735584B2 (en) Method for forming insulating film on electrical steel sheet

Legal Events

Date Code Title Description
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 19990615

S531 Written request for registration of change of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313531

S533 Written request for registration of change of name

Free format text: JAPANESE INTERMEDIATE CODE: R313533

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20080716

Year of fee payment: 9

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090716

Year of fee payment: 10

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100716

Year of fee payment: 11

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100716

Year of fee payment: 11

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110716

Year of fee payment: 12

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110716

Year of fee payment: 12

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120716

Year of fee payment: 13

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120716

Year of fee payment: 13

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130716

Year of fee payment: 14

LAPS Cancellation because of no payment of annual fees