Patent ID: 8580864

Claim:
A method for preparing a polyisocyanurate/polyurethane foam which comprises contacting at least one polyisocyanate with at least one polyol, in the presence of at least one blowing agent and a catalytically effective amount of a catalyst composition comprising a solution of at least one diluent having dissolved therein at least one α,β-unsaturated carboxylate salt of the formula: wherein X, Y, and Z are selected independently from methyl, —CO 2 H; —CO 2 M; or a hydrogen atom; and wherein M in each occurrence is selected independently from (i) a potassium ion, or (ii) a quaternary ammonium ion, and wherein the at least one α,β-unsaturated carboxylate salt comprises a salt of at least one of acrylic acid, methacrylic acid, and fumaric acid.