发明授权
US4181782A Preparation of polyisocyanates having biuret groups and their use in
synthetic foamed resins and lacquers
失效
具有缩二脲基团的多异氰酸酯的制备及其在合成发泡树脂和漆中的应用
- 专利标题： Preparation of polyisocyanates having biuret groups and their use in synthetic foamed resins and lacquers
- 专利标题（中）： 具有缩二脲基团的多异氰酸酯的制备及其在合成发泡树脂和漆中的应用
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申请号： US960418申请日： 1978-11-13
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公开(公告)号： US4181782A公开(公告)日： 1980-01-01
- 发明人: Edgar Mohring , Kuno Wagner , Hanns P. Muller
- 申请人： Edgar Mohring , Kuno Wagner , Hanns P. Muller
- 申请人地址： DEX
- 专利权人： Bayer Aktiengesellschaft
- 当前专利权人： Bayer Aktiengesellschaft
- 当前专利权人地址： DEX
- 优先权： DEX2619548 19760504
- 主分类号： C07C273/18
- IPC分类号： C07C273/18 ; C07C275/62 ; C08G18/78 ; C08G18/14 ; C07C127/24 ; C08G18/77
摘要：
The present invention relates to a process for the preparation of polyisocyanates having biuret groups by reaction of excess quantities of organic polyisocyanates with compounds which react with isocyanate groups to form biuret groups, characterized in that the organic polyisocyanates are reacted with a mixture of water and at least one aliphatic, cycloaliphatic or araliphatic monoamine or polyamine.