Patent ID: 6114488
Filing Date: 2000-09-05
Classification: C08G

Abstract:
In a method for the casting of a polyurethaneurea elastomer which comprises mixing a polyurethane prepolymer, an amine curative and optionally a polyol in a mixing head and depositing the mixture in a casting mold, the improvement which comprises employing an amine curative comprising:(a) 2-45 wt % aminobenzoate functionalized polyol having a functionality .gtoreq.1.9 and a weight average molecular weight of 200-3,000,(b) 55-98 wt % aromatic polyamine, and(c) 0.01 to <5 parts by wt carboxylic acid catalyst per hundred parts (a) and (b),the amine curative being at a temperature sufficient to melt the amines when mixed with the polyurethane prepolymer.