Patent ID: 8026333

Claim:
A process for polyurethane synthesis comprising the steps of: a) providing a catalyst of the formula R 1 a R 2 b R 3 c Sn[CH(OX)R 4 ] d , wherein R 1 , R 2 , and R 3 are the same or different and represent an optionally substituted hydrocarbyl, aromatic, alkoxide, amide, halide or stannyl group, R 4 represents an optionally substituted hydrocarbyl or optionally substituted aryl group, a, b, and c are independently 0, 1, 2, or 3; d is 1, 2 or 3; and a+b+c+d=4; and X is an acid-labile or moisture-labile protecting group; b) contacting at least one isocyanate with the catalyst of step a) to form a blend; c) contacting the blend of step b) to at least one polyol to form a mixture; and d) optionally exposing the mixture of step c) to air or a gas comprising oxygen.