Patent ID: 7498397
Filing Date: 2009-03-03
Classification: C08G

Abstract:
1. A copolycarbonate of the formula wherein 5 to 50 mole percent of the total number of R wherein each R f is independently at each occurrence a halogen atom, a hydrocarbon group having 1 to 10 carbons, or a halogen substituted hydrocarbon group having 1 to 10 carbons, and n is 0 to 4; and 50 to 95 mole percent of the R wherein R a and R b are each independently a halogen atom or a monovalent C 1-6 alkyl group; p and q are each independently integers of 0 to 4; and X a is one of the following groups: wherein R the copolycarbonate comprises at least 10% fewer carbonate linkages of formula (4) than would be theoretically obtained in a random copolymer made from the same ratio of the monomer of formula (2) and the dihydroxy compound of formula (7) or the arylene-containing compounds.