再颁专利
USRE33609E Production of polyurethane moldings by the reaction injection molding
process
失效
通过反应注塑成型工艺生产聚氨酯模塑制品
- 专利标题： Production of polyurethane moldings by the reaction injection molding process
- 专利标题（中）： 通过反应注塑成型工艺生产聚氨酯模塑制品
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申请号： US331874申请日： 1989-03-31
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公开(公告)号： USRE33609E公开(公告)日： 1991-06-11
- 发明人: Neil H. Nodelman
- 申请人： Neil H. Nodelman
- 申请人地址： PA Pittsburgh
- 专利权人： Mobay Corporation
- 当前专利权人： Mobay Corporation
- 当前专利权人地址： PA Pittsburgh
- 主分类号： C08G18/32
- IPC分类号： C08G18/32 ; C08G18/38 ; C08G18/66
摘要：
The present invention is directed to a process for the production of polyurethane moldings by reacting a reaction mixture comprising(a) an organic polyisocyanate(b) a compatible polyol blend comprising(i) at least one polyether polyol having a hydroxyl functionality of from 2 to 8, and a molecular weight of from 350 to below 1800, and(ii) at least one hydroxyl functional organic material containing from 2 to 8 hydroxyl groups and having a molecular weight below 350, components (i) and (ii) being used in a weight ratio of component (b)(i) to (b)(ii) of from about 10:1 to about 1:10, and(iii) no more than 45% by weight based on the weight of component (b) of an active hydrogen containing compound having a molecular weight of 1800 or more,said reaction mixture being processed as a one-shot system by the RIM process at an isocyanate index of from about 70 to about 130.
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