Patent ID: 6133402
Filing Date: 2000-10-17
Classification: C08G

Abstract:
Compound having the formula ##STR15## where each R.sub.1 is selected from the group consisting of C.sub.1 -C.sub.20 alkyl where one or more hydrogens is optionally replaced by halogen and C.sub.6 -C.sub.20 aryl where one or more hydrogens is optionally replaced by halogen and each R.sub.1 is the same or different and each R.sub.2 is selected from the group consisting of hydrogen, cyano, C.sub.1 -C.sub.20 alkyl where one or more hydrogens is optionally replaced by halogen and C.sub.6 -C.sub.20 aryl where one or more hydrogens is optionally replaced by halogen and each R.sub.2 is the same or different, and R is selected from the group consisting of C.sub.1 -C.sub.20 alkyl, C.sub.6 -C.sub.20 aryl and polymer of weight average molecular weight up to 1,000,000 having at least one pendant carboxyl group, or dimer thereof, said compound or dimer thereof being effective to catalyze the reaction of epoxide and CO.sub.2 to form polycarbonate.