Patent ID: 8236868
Filing Date: 2012-08-07
Classification: C08G,C08L

Abstract:
1. A process for producing polyurethane elastomer foams, which comprises mixing an isocyanate-terminated prepolymer consisting of an isocyanate-terminated prepolymer obtained by reaction of polyol with 3,3′-dimethylbiphenyl-4,4′-diisocyanate, which is used in a proportion so that the isocyanate group of the 3,3′-dimethylbiphenyl-4,4′-diisocyanate is more than 1 less than 5 equivalents on the basis of one equivalent weight of the OH group of the polyol, with a foaming agent comprising a mixture of water, a low-molecular weight glycol having a molecular weight of 48-200, and a high-molecular weight glycol having a number average molecular weight Mn of 1000-3000 under stirring, thereby conducting foaming reaction.