C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 271/28 (2006.01) C08G 18/10 (2006.01) C08G 18/79 (2006.01) C08G 18/80 (2006.01) C08G 18/81 (2006.01) C08L 75/04 (2006.01)
Patent
CA 2137540
The invention relates to a process for the preparation of compact or cellular polyurethanes by reacting relatively high-molecular- weight polyhydroxyl compounds with a liquid polyisocyanate com- position containing urethane groups in the presence or absence of chain extenders and/or crosslinking agents, the polyisocyanate composition being obtainable from mixtures of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates and linear, branched or cyclic, saturated or olefinically unsatur- ated, low-molecular-weight monoalcohols, to the liquid polyiso- cyanate compositions containing urethane groups which can be used for this purpose, and to their use for the preparation of prefer- ably highly crosslinked polyurethanes, in particular rigid PU (molded) foams.
Swoboda Johann
Volkert Otto
Basf Aktiengesellschaft
Robic
LandOfFree
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