发明名称 |
LIQUID, LIGHT-COLORED POYLISOCYANATE MIXTURES AND A PROCESS FOR THEIR PRODUCTION |
摘要 |
Mo-3827 LeA 28,738 LIQUID, LIGHT-COLORED POLYISOCYANATE MIXTURES AND A PROCESS FOR THEIR PRODUCTION An isocyanate terminated prepolymer based upon diphenylmethane isocyanates. This prepolymer is the reaction product of a diphenylmethane isocyanate mixture having from about 75 to about 95 wt% binuclear isomers and from about 5 to about 25 wt% polymeric isocyanate with a polyether polyol. The binuclear isomer content is generally from about 15 to about 40 wt% 2,4'-isomer and from about 2 to about 10 wt% 2,2'-isomer. The polyether polyol has a functionality of from about 3 to about 8, an OH number of from about 350 to about 1000 mg KOH/g and a molecular weight of from about 150 to about 1000. These prepolymers are particularly useful as starting materials for the production of light-colored, dimensionally stable rigid polyurethane foams. Le A 28 730- Foreign Countries US
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申请公布号 |
CA2086652(A1) |
申请公布日期 |
1993.07.08 |
申请号 |
CA19932086652 |
申请日期 |
1993.01.04 |
申请人 |
BAYER AKTIENGESELLSCHAFT |
发明人 |
GEBAUER, HERBERT;GUPTA, PRAMOD;HOPPE, MARTIN;WIEDERMANN, ROLF |
分类号 |
C08G18/10;C08G18/48;C08G18/76;C08G18/80;C08G101/00;(IPC1-7):C08G18/76 |
主分类号 |
C08G18/10 |
代理机构 |
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地址 |
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