Polyurethanes prepared with novel mannich bases

Claim 1

Semi-rigid polyurethane foams having high bond strengths with acrylonitrile-butadiene-styrene or polyvinyl chloride polymers prepared by a process comprising reacting in the presence of blowing agents and optionally in the presence of catalysts and/or stabilizers, organic polyisocyanates with polyhydroxyl compounds having a molecular weight of about 800 to about 10,000 in the presence of from 3 to 50 parts by weight per 100 parts by weight of polyhydroxyl compound, of a Mannich base of the formula: ##STR27## wherein A is (1) or --OR 9 , ##STR28## m is an integer of from 1 to 8, preferably 1 or 2; n is an integer equal to 1 when m is 1 and otherwise is 0. x is an integer of from 1 to 6; B is --H, C 1 -C 16 alkyl, or when A is (1) or A is (2) and n is 0, ##STR29## but preferably --H; y is an integer from 2 to 8, but preferably 2; R 1 through R 9 are the same or different and are C 1 -C 12 alkyl and, Y, y' and Y" are the same or different and are --H or C 1 -C 16 alkyl, the amounts of reactants being such that the NCO to active hydrogen ratio is from about 0.9:1 to about 1.1:1.