发明授权
US5407990A Composition and method for forming insulating films on electrical steel
sheets
失效
用于在电工钢板上形成绝缘膜的组合物和方法
- 专利标题： Composition and method for forming insulating films on electrical steel sheets
- 专利标题（中）： 用于在电工钢板上形成绝缘膜的组合物和方法
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申请号： US663959申请日： 1991-03-20
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公开(公告)号： US5407990A公开(公告)日： 1995-04-18
- 发明人: Yasuharu Maeda , Akira Sakakura , Kenichi Masuhara , Koji Tanaka
- 申请人： Yasuharu Maeda , Akira Sakakura , Kenichi Masuhara , Koji Tanaka
- 申请人地址： JPX Tokyo JPX Osaka
- 专利权人： Nisshin Steel Co., Ltd.,Toyobo Co., Ltd.
- 当前专利权人： Nisshin Steel Co., Ltd.,Toyobo Co., Ltd.
- 当前专利权人地址： JPX Tokyo JPX Osaka
- 优先权： JPX1-207872 19890814; JPX1-303159 19891124
- 主分类号： B23K35/22
- IPC分类号： B23K35/22 ; C23C22/74 ; H01F1/18 ; C08K3/10
摘要：
A composition for forming insulating films on electrical steel sheets includes a (meth)acrylate ester polymer, modified into a polymer containing an ethylenic unsaturated carboxylic acid component as an essential copolymerizable component, optionally with other copolymerizable vinylic compound components. The composition is used in the form of an aqueous emulsion with or without methacrylate ester base polymer powders. The composition has low expandability and coatability and provides an improved film. Especially when the composition contains methacrylate ester base polymer powders, improved weldability is achieved and high-quality coated steel sheet products are provided. A method of forming the insulating films is also described.