HIGH HEAT POLYCARBONATE COMPOSITIONS, METHODS FOR THE PREPARATION THEREOF, AND ARTICLES DERIVED THEREFROM

摘要

Melt blended compositions, comprising up to 20 wt% of an optional additive, and 80-100 wt% of a polymer composition which comprises 5 to 95 wt% of a copolycarbonate having a Tg of 2000C or more of (1) -[R'-U-I-OJ^R'-O-J-OIT (D, wherein the mole ration of x:y is 35:65 to 90:10, R<SUP>1</SUP> is derived from a dihydroxy compound (2) wherein R<SUP>3</SUP> and R<SUP>5</SUP> are each independently a halogen or a C<SUB>1-6</SUB> alkyl group, R<SUP>4</SUP> is a C<SUB>1-6</SUB> alkyl, phenyl, or phenyl substituted with up to five halogens or C<SUB>1-6</SUB> alkyl groups, and each c is independently 0 to 4; R<SUP>2</SUP> is derived from a dihydroxy compound (6): wherein R<SUP>a</SUP> and R<SUP>b</SUP> are each independently a halogen atom or a monovalent C<SUB>1-6</SUB> alkyl group: p and q are each independently integers of 0 to 4; and Xa is a divalent group; and 95 to 5 wt% of a polycarbonate having a Tg of less than 2000C of formula (9) wherein R<SUB>9</SUB> derived from a dihydroxy compound of formula (6); and 0.001 to 0.1 wt% of a transesterification catalyst.