发明名称 |
Polyisocyanurate compositions and foams of improved friability and process of preparing same |
摘要 |
In a process of preparing a polyisocyanurate foam, which process comprises: reacting a polyisocyanate in the presence of a trimerization catalyst and an expanding amount of an inert blowing agent to provide a polyisocyanurate foam, the improvement which comprises: carrying out the reaction in the presence of a plasticizing amount of a nonvolatile liquid carbonate to produce a polyisocyanurate foam having improved friability and dimensional stability properties.
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申请公布号 |
US4033908(A) |
申请公布日期 |
1977.07.05 |
申请号 |
US19750607201 |
申请日期 |
1975.08.25 |
申请人 |
GENERAL LATEX AND CHEMICAL CORPORATION |
发明人 |
HOPKINS, JR., HENRY S.;VARGO, DONALD L. |
分类号 |
C08G18/02;(IPC1-7):C08G18/14 |
主分类号 |
C08G18/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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