发明授权
US06667370B1 Method for producing prepolymers containing isocyanate end groups, incorporating a small proportion of base isocyanates
失效
制备含有异氰酸酯端基的预聚物的方法,其中加入少量的碱异氰酸酯
- 专利标题: Method for producing prepolymers containing isocyanate end groups, incorporating a small proportion of base isocyanates
- 专利标题(中): 制备含有异氰酸酯端基的预聚物的方法,其中加入少量的碱异氰酸酯
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申请号: US10049926申请日: 2002-02-20
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公开(公告)号: US06667370B1公开(公告)日: 2003-12-23
- 发明人: James-Michael Barnes , Manfred Schmidt , Stefan Wershofen , Andreas Hoffmann
- 申请人: James-Michael Barnes , Manfred Schmidt , Stefan Wershofen , Andreas Hoffmann
- 优先权: DE19939840 19990823
- 主分类号: C08G1810
- IPC分类号: C08G1810
摘要:
This invention relates to a process for producing prepolymers, which contain isocyanate terminal groups and which have a very low content of free isocyanate starting materials, from polyester polyols and polyisocyanates.
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