公开(公告)号：US3925268A

公开(公告)日：1975-12-09

申请号：US36955673

申请日：1973-06-13

Applicant: UNION CARBIDE CORP

Inventor： ROSEMUND WALTER RICHARD ,  SANDNER MICHAEL RAY ,  TRECKER DAVID JOHN

IPC: C08G18/00 ,  C08F4/00 ,  C08G18/18 ,  C08G18/40 ,  C08G18/63 ,  C08G18/14 ,  C08G18/20

CPC classification number: C08G18/632 ,  C08G18/185 ,  C08G18/4009 ,  C08G18/4072 ,  Y10S521/904

Abstract: Cellular urethane polymers essentially free of the strong, objectionable amine odor characteristic of N-ethylmorpholine, are provided by effecting the polyurethane forming reaction in the presence of beta-tert-amino nitriles. In view of their low residual odor and effectiveness in the catalysis of the waterisocyanate reaction, the beta-amino nitriles either alone or in combination with other tertiary amines, are used with particular advantage as direct replacements for N-ethyl-morpholine in the manufacture of water-blown flexible polyurethanes, both molded and free-rise, including high-resilience foam as well as foams stabilized with either organosilicone or silicon-free organic surfactants. Especially effective for the formation of flexible polyester foam stabilized with either type of surfactant are blends of the beta-amino nitrile catalyst such as, in particular, 3-(N,N-dimethylamino)propionitrile, with dimethylethanolamine or a bis(2-(N,N-dimethylamino)alkyl)-ether.