Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Organic compound containing
Patent
1990-05-07
1991-12-10
Kight, III, John
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Organic compound containing
521 50, 521115, 521118, 521166, 502167, B01J 2724
Patent
active
050718096
ABSTRACT:
The invention pertains to tertiary amines used as catalysts for the preparation of polyurethane foams prepared via the catalytic reaction of a polyisocyanate with a polyol in the presence of blowing agents, etc. The tertiary amine catalysts are prepared by reacting an olefinic nitrile with aliphatic polyol having at least secondary hydroxyl functionality in a ratio less than stoichiometric for providing cyanoalkylated polyol having residual hydroxyl functionality. The resulting cyanoalkylated polyol then is reacted with a secondary amine under conditions for effective reductive alkylation.
The tertiary amine catalysts, because of residual secondary hydroxyl functionality, provide for uniform dispersion within a polyurethane formulation; they provide for additional or extended pot life in polyurethane formulations at temperatures below reaction condition, and they are bound by reaction on cure.
REFERENCES:
patent: 3492330 (1970-01-01), Trecker et al.
patent: 4038210 (1977-07-01), Rosemund et al.
"C.sub.4 -Diol Chain Extenders in Castable and Rim Urethanes", Lin, I. et al., J. Elastomers and Plastics, vol. 15 (Apr. 1983), pp. 57-80.
Birch, S. et al., J. Org. Chem., vol. 21, pp. 970-974 (1956).
Carr Richard V. C.
Casey Jeremiah P.
Petrella Robert G.
Wasilczyk George J.
Air Products and Chemicals Inc.
Brewer Russell L.
Kight III John
Marsh William F.
Simmons James C.
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