C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/131, 402/133
C08G 18/78 (2006.01) C08G 18/12 (2006.01) C08G 18/66 (2006.01)
Patent
CA 1248681
A PROCESS FOR THE PRODUCTION OF POLYISOCYANATE PREPA- RATIONS CONTAINING UREA AND/OR BIURET GROUPS, THE POLY- ISOCYANATE PREPARATIONS OBTAINABLE BY THIS PROCESS AND THEIR USE AS ISOCYANATE COMPONENT IN THE PRODUCTION OF PLASTICS BY THE ISOCYANATE-POLYADDITION PROCESS ABSTRACT OF THE DISCLOSURE The present invention is directed to a process for the production of urea- and/or biuret-modified polyisocyanates by reacting organic polyisocyanates with a mixture of high molecular weight isocyanate- reactive compounds and low molecular weight isocyanate- reactive compounds, wherein at least 25% of the iso- cyanate-reactive groups are primary amino groups. The present invention is further directed to the products obtained by this process and their use for the pro- duction of polyisocyanate polyaddition products, es- pecially for the preparation of molded articles by the RIM process.
507883
Paul Reiner
Rasshofer Werner
Seel Klaus
Weber Christian
Aktiengesellschaft Bayer
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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