Beta-amino nitrile catalysts for polyurethane preparation
US4038210A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1975 |
| Grant date | Jul 26, 1977 |
| Priority date | — |
| Expiry date | Jul 17, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/4009
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
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-tertamino nitriles. In view of their low residual odor and effectiveness in the catalysis of the water-isocyanate reaction, the beta-amino nitriles either alone or in combination with other tertiary amines, are used with particular advantage as direct replacements for N-ethylmorpholine 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.