Imperial Chemical Industries Limited

Johnson Matthey Inc.

Bruno Frederic Stengel

John Ridland

Martin G Partridge

A composition suitable for use as a catalyst for the reaction of an isocyanate compound or prepolymer thereof with an alcohol to form a polyurethane comprises a mixture of (a)an organometallic compound selected from: (i) a compound of formula M(RO), where M is titanium, zirconium, hafnium, aluminium, cobalt or iron or a mixture of these metals and OR is the residue of an alcohol ROH in which R comprises an (optionally substituted) Ccyclic, 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 a ketone, aldhehyde, carboxylic acid, sulphonic acid, nitride or an imine. An isocyanate composition containing a catalyst of the claimed composition is also described.

Organometallic compositions

An organometallic composition is described which comprises a complex of at least one orthoester of a metal having a formula M(ROAcAc) (OR&prime;) in which M is selected from the group consisting of titanium, zirconium and hafnium; ROAcAc denotes an ester of an alochol ROH, in which R comprises an (optionally substituted) C cyclic, branched or linear, alkyl, alkenyl, aryl or alkyl-aryl group or a mixture thereof, with acetoacetic acid; OR&prime; is the residue of an alcohol R&prime;OH in which R&prime; comprises an (optionally substituted) C cyclic, branched or linear, alkyl, alkenyl, aryl or alkyl-aryl group or a mixture thereof, and x and y are each in the range 1-3. The composition is useful as a curing agent for polyurethanes used in various applications.

Growing community of inventors

Stockton on Tees, United Kingdom

Bruno Frederic Stengel