发明授权
- 专利标题: Dispersing solid polyurethane prepolymers into water
- 专利标题(中): 将固体聚氨酯预聚物分散在水中
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申请号: US727088申请日: 1976-09-27
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公开(公告)号: US4094842A公开(公告)日: 1978-06-13
- 发明人: Wolfgang Wenzel , Dieter Dieterich
- 申请人: Wolfgang Wenzel , Dieter Dieterich
- 申请人地址: DT Leverkusen
- 专利权人: Bayer Aktiengesellschaft
- 当前专利权人: Bayer Aktiengesellschaft
- 当前专利权人地址: DT Leverkusen
- 优先权: DT2543091 19750926
- 主分类号: C08G18/00
- IPC分类号: C08G18/00 ; C08G20060101 ; C08G18/08 ; C08G18/10 ; C08G18/12 ; C08G18/38 ; C08G18/48 ; C08G18/50 ; C08G18/81 ; C08G18/83 ; C08G18/84 ; C08J3/05 ; C08J3/04 ; C08G18/82 ; C08J3/24
摘要:
This invention relates to a novel process for the production of polyurethane via an intermediate stage of aqueous dispersions of oligomeric polyurethane prepolymers having ionic and/or non-ionic hydrophilic groups which ensure their dispersibility in water, followed by conversion of these water-dispersible oligomers into cross-linked high molecular weight sheets.
公开/授权文献
- US5877539A Bipolar transistor with a reduced collector series resistance 公开/授权日:1999-03-02
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