A process for producing a polyurethane foam by reacting an organic polyisocyanate with an organic polyester polyol or polyether polyol in the presence of a catalytic amount of specific amine compounds of the formula: ##STR1## wherein R1 is a methyl or ethyl and R2 is hydrogen or methyl such that when R1 is methyl, R2 is methyl and when R1 is ethyl, R2 is hydrogen, X is an organic mono or dicarboxy