发明名称 |
CONDENSATION POLYMERISATION METHOD FOR ISOCYANATES |
摘要 |
The invention concerns a (cyclo)trimerisation method for isocyanates having at least two isocyanate functions, characterised in that it comprises: a) reacting initial isocyanate monomers having at least two isocyanate functions, optionally in the presence of other monomers reactive with the isocyanate monomers having at least two isocyanate functions at a temperature of at least 20° C., advantageously at least 50° C., and lower than 200° C., advantageously lower than 150° C., in the presence of a compound comprising at least one rare earth alcoholate function; b) stopping the reaction by inactivating the catalyst or its derivative forms in the reaction medium at a transformation rate of at least 2.5% and at most 90% of the initial isocyanate functions; and optionally c) distilling the reaction medium to eliminate the unreacted monomers. |
申请公布号 |
EP1250367(B1) |
申请公布日期 |
2006.04.12 |
申请号 |
EP20000991294 |
申请日期 |
2000.12.29 |
申请人 |
RHODIA CHIMIE |
发明人 |
DALLEMER, FREDERIC;BERNARD, JEAN-MARIE;REVELANT, DENIS;LEISING, FREDERIC |
分类号 |
C08G18/02;C08G18/09;C08G18/22 |
主分类号 |
C08G18/02 |
代理机构 |
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代理人 |
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地址 |
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