Patent ID: 6248801
Filing Date: 2001-06-19
Classification: C08G,C08J

Abstract:
A method for preparing a flexible polyurethane foam which comprises reacting a polyisocyanate with a polyol in the presence of a urethane catalyst, a blowing agent, optionally a silicone surfactant cell stabilizer, and an effective amount of a cell opening additive, wherein the cell opening additive comprises an active methylene or methine compound containing at least one tertiary amine represented by one of the formulae: ##STR24##wherein Y and Y' are, independently, substituted C6-C10 aryl or CXX'X"" wherein X, X', and X"" are, independently, hydrogen, halogen, C1-C20 alkyl, C1-C20 alkylether, C1-C20 alkylamino, C6-C10 aryl, substituted C1-C20 alkyl, or substituted C6-C10 aryl, and at least one of the substituents on Y or Y' contains a tertiary amine group, and D is an electron-withdrawing substituent selected from the group consisting of CN, NO.sub.2, Cl, Br, CF.sub.3, I, CHO, and C(O)NH.sub.2.