PROCESS FOR PRODUCING RIGID POLYURETHANE FOAM.

摘要

A process for producing rigid polyurethane foam by using 1,1-dichloro-1-fluoroethane (HCFC-141b) as the blowing agent while substantially preventing the generation of decomposition products of HCFC-141b. The process comprises foaming a mixture of a polyol with an organic polyisocyanate in the presence of HCFC-141b and a stabilizer thereof by using an organometallic catalyst or/and an imidazole catalyst.