Patent ID: 7183331

Claim:
A method for producing a rigid polyurethane foam which comprises reacting a polyol with a polyisocyanate in the presence of an amine catalyst and blowing agent, wherein as the amine catalyst, at least one amine compound is selected from the group consisting of N-acetylethylenediamine, N,N,N′-trimethyldiethylenetriamine, N,N,N′,N″-tetramethyltriethylenetetramine, N,N,N′,N″,N″′-pentamethyltetraethylenepentamine, N,N,N′,N″,N″′,N″″-hexamethylpentaethylenehexamine, and N,N-dimethylaminoethyl-N′-methylaminoethanol and the blowing agent is 1,1,1,3,3-pentafluoropropane (HFC-245fa).