STABILIZATION OF FLAME RETARDANT PREMIX FOR POLYURETHANE FOAMS

摘要

122-P-US02277 STABILIZATION OF FLAME RETARDANT PREMIX FOR POLYURETHANE FOAMS The storage stability of otherwise unstable premix compositions for flame retardant rigid polyurethane foams containing in the premix a chlorinated polyether polyol and a tertiary amine catalyst, is enhanced by incorporation into the premix a synergistic combination of an organic sulfur compound and an unsaturated carbon compound. The preferred sulfur compound is thiourea; among the preferred unsaturated carbon compounds are unsaturated terpenes such as allo-ocimene and unsaturated higher fatty acids such as tall oil fatty acids and mono-, di-, and trienic C18 acids.