发明授权
- 专利标题: Urea and biuret liquid prepolymers of MDI
- 专利标题(中): MDI的脲和缩二脲液体预聚物
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申请号: US247728申请日: 1994-05-23
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公开(公告)号: US5428124A公开(公告)日: 1995-06-27
- 发明人: William E. Slack , Robert P. Yeater , Robson Mafoti , Josef Sanders
- 申请人: William E. Slack , Robert P. Yeater , Robson Mafoti , Josef Sanders
- 申请人地址: PA Pittsburgh
- 专利权人: Miles Inc.
- 当前专利权人: Miles Inc.
- 当前专利权人地址: PA Pittsburgh
- 主分类号: C08G18/67
- IPC分类号: C08G18/67 ; C08G18/78 ; C08G18/81 ; C08G18/10 ; C08G18/30
摘要:
Storage stable, liquid prepolymers of diphenylmethane diisocyanate containing urea and/or biuret groups are prepared by reacting an aminocrotonate with a mixture of isocyanates having a specified diphenylmethane diisocyanate isomer content. These prepolymers have isocyanate group contents of from about 5 to about 30%.
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