发明授权
US4016122A Anionic aqueous polyurethane having blocked NCO groups and process
失效
具有阻塞NCO基团的阴离子水性聚氨酯和方法
- 专利标题： Anionic aqueous polyurethane having blocked NCO groups and process
- 专利标题（中）： 具有阻塞NCO基团的阴离子水性聚氨酯和方法
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申请号： US705266申请日： 1976-07-14
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公开(公告)号： US4016122A公开(公告)日： 1977-04-05
- 发明人: Kazuo Matsuda , Hidemasa Ohmura , Takeyo Sakai
- 申请人： Kazuo Matsuda , Hidemasa Ohmura , Takeyo Sakai
- 申请人地址： JA Tokyo
- 专利权人： Kao Soap Co., Ltd.
- 当前专利权人： Kao Soap Co., Ltd.
- 当前专利权人地址： JA Tokyo
- 优先权： JA50-93326 19750731
- 主分类号： C08G18/00
- IPC分类号： C08G18/00 ; C08G18/08 ; C08G18/10 ; C08G18/80 ; C08J3/06
摘要：
An aqueous anionic polyurethane emulsion is prepared by reacting an isocyanate-terminated urethane prepolymer with an excess of a polyalkylene polyamine thereby to form a polyurethane-urea-polyamine, reacting a portion of the free amino groups of said polyurethane-urea-polyamine with a blocked polyisocyanate having a single free isocyanate group, reacting the resulting product with a cyclic dicarboxylic acid anhydride, and mixing the resulting product with an aqueous solution of a basic substance.
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