发明授权
US5202001A Preparation of urethane prepolymers having low levels of residual
toluene diisocyanate
失效
制备具有低残留甲苯二异氰酸酯含量的氨基甲酸酯预聚物
- 专利标题： Preparation of urethane prepolymers having low levels of residual toluene diisocyanate
- 专利标题（中）： 制备具有低残留甲苯二异氰酸酯含量的氨基甲酸酯预聚物
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申请号： US727501申请日： 1991-07-09
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公开(公告)号： US5202001A公开(公告)日： 1993-04-13
- 发明人: William E. Starner , Bernard A. Toseland , Reinaldo M. Machado
- 申请人： William E. Starner , Bernard A. Toseland , Reinaldo M. Machado
- 申请人地址： PA Allentown
- 专利权人： Air Products and Chemicals, Inc.
- 当前专利权人： Air Products and Chemicals, Inc.
- 当前专利权人地址： PA Allentown
- 主分类号： C07C269/08
- IPC分类号： C07C269/08 ; C08G18/10 ; C08G18/76
摘要：
A wiped film evaporation process for reducing the amount of residual organic polyisocyanate, especially toluene diisocyanate, in a polyurethane prepolymer reaction product mixture. An inert sweeping gas is added to the evaporation process, preferably after first passing through a holdup volume of the prepolymer which has passed through the evaporation zone.
公开/授权文献
- US5858925A Heterocyclylbenzonitriles 公开/授权日：1999-01-12
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