Catalyst compositions for making polyurethane based on imidazoles and boron compounds

摘要

A method for catalyzing the blowing reaction and making polyurethane foams employing a catalyst composition consisting essentially of a hydroxy-functional imidazole of the following formula I <IMAGE> I where R1 is a C1-C10 alkyl; R2 is hydrogen, methyl or ethyl and R3 is hydrogen or a C1-C20 organic group optionally having an ether functionality, provided that when R1 is methyl, R2 and R3 are not both hydrogen or a hydrogen and a methyl, in combination with a boron compound of the formulaRnB(OH)3-nwhere n=0 or 1, and R=C1-C8 alkyl, C5-C8 cycloalkyl, or C6-C10 aryl.