发明授权
- 专利标题： Process for preparing heat-resistant polyurethane elastomers having no secondary softening range
- 专利标题（中）： 制备无二次软化范围的耐热聚氨酯弹性体的方法
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申请号： US923114申请日： 1978-07-10
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公开(公告)号： US4191818A公开(公告)日： 1980-03-04
- 发明人: Karl H. Illers , Herbert Stutz
- 申请人： Karl H. Illers , Herbert Stutz
- 申请人地址： MI Wyandotte
- 专利权人： BASF Wyandotte Corporation
- 当前专利权人： BASF Wyandotte Corporation
- 当前专利权人地址： MI Wyandotte
- 优先权： DEX2547864 19751025
- 主分类号： C08G18/10
- IPC分类号： C08G18/10 ; C08G18/72 ; C08G18/76
摘要：
Polyurethane elastomers of improved heat stability are made by a process in which a polyisocyanate is reacted with a polyol of high molecular weight with an OH:NCO ratio of 1:0.66 to 1:0.85, and the resulting adduct is later reacted with an excess of symmetrical diisocyanate and a diol as chain extender.
公开/授权文献
- US6080228A Gas transfer pipe arrangement 公开/授权日：2000-06-27
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