Patent ID: 7169875

Claim:
A catalyst composition suitable for use to catalyse the reaction of an isocyanate compound or prepolymer thereof with an alcohol, polyol or prepolymer thereof to form a polyurethane, said catalyst composition comprising a mixture made by mixing together (a) an organometallic compound selected from (i) an alkoxide compound of formula M(OR) x , wherein M is a metal selected from the group consisting of titanium, zirconium, hafnium, aluminum, cobalt, iron, and mixtures thereof, wherein x is the valency of the metal, and wherein OR is the residue of an alcohol ROH in which R comprises an (optionally substituted) C 1-30 cyclic, branched or linear, alkyl, alkenyl, aryl or alkyl-aryl group or a mixture thereof, or (ii) a complex of titanium, zirconium and/or hafnium and an acetoacetate ester and (b) a coordinating compound selected from the group consisting of ketones and aldehydes, wherein said coordinating compound does not comprise a diketone or an acetoacetate ester, and wherein the molar ratio of organometallic compound to coordinating compound is in the range 1:0.5 to 1:10.