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PROCESS FOR THE PREPARATION OF FLUORCHLOROHYDROCARBON-FREE, LOW-DENSITY POLYURETHANE SOFT FOAMS AND SOFT ELASTIC POLYURETHANE MOLDING FOAMS AND POLYISOCYANATE MIXUTES MODIFIED WITH URETHANE GROUPS ON DIPHENYLMETHANE-DIISOCYANATE BASE
PROCESS FOR THE PREPARATION OF FLUORCHLOROHYDROCARBON-FREE, LOW-DENSITY POLYURETHANE SOFT FOAMS AND SOFT ELASTIC POLYURETHANE MOLDING FOAMS AND POLYISOCYANATE MIXUTES MODIFIED WITH URETHANE GROUPS ON DIPHENYLMETHANE-DIISOCYANATE BASE