Catalytic process for polyurethane elastomers and foams

Claim 1

A process for the production of polyurethane resins by the reaction of polyisocyanates, higher molecular weight compounds having at least two hydrogen atoms capable of reacting with isocyanates in the presence of catalyst combinations of an amine and an organometallic compound, the improvement wherein the catalyst combinations comprise: A. 1 mol of a metal compound corresponding to the following formula: Me X.sub.n Y.sub.m, wherein Me represents a metal having a valency of (n+m), X represents an aliphatic hydrocarbon group having from 1 to 18 carbon atoms, an aromatic hydrocarbon group having from 6 to 10 carbon atoms, or an araliphatic hydrocarbon group having from 7 to 15 carbon atoms, Y represents an enolate group having from 5 to 18 carbon atoms or an aliphatic carboxylate group having from 2 to 18 carbon atoms, n represents an integer of from 0 to 2 and m represents an integer of from 0 to 4 such that the sum of (n+m) is from 2 to 4, and B. from about 0.5 to about 5 mols, of an aromatic compound containing at least one nitrogen atom as hetero atom and having at least one primary amino group in the ortho- or para-position to the hetero atom.