B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/715
B29C 45/00 (2006.01) B29C 45/14 (2006.01) C08G 18/08 (2006.01) C08G 18/38 (2006.01) C08G 18/66 (2006.01)
Patent
CA 1289320
PRODUCTION OF POLYURETHANE MOLDINGS BY THE REACTION INJECTION MOLDING PROCESS ABSTRACT OF THE DISCLOSURE The present invention is directed to a process for the production of polyurethane moldings by reacting a reaction mixture comprising a) an organic polyisocyanate b) a compatible polyol blend comprising (i) at least one polyether polyol having an hydroxyl functionality of from 2 to 8, and a molecular weight of from 350 to below 1800, and (ii) at least one hydroxyl functional organic material containing from 2 to 8 hydroxyl groups and having a molecular weight below 350, components i) and ii) being used in a weight ratio of component b)i) to b)ii) of from about 10:1 to about 1:10, and (iii) no more than 45% by weight based on the weight of component b) of an active hydrogen containing compound having a molecular weight of 1800 or more, said reaction mixture being processed as a one-shot system by the RIM process at an isocyanate index of from about 70 to about 130.
568409
Mobay Corporation
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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