| 摘要 |
A flame retardant thermoplastic composition comprising in combination a polycarbonate component comprising an aromatic polycarbonate and a polycarbonate homopolymer or copolymer comprising repeat carbonate units having the following structure: wherein R<SUB>1 </SUB>and R<SUB>2 </SUB>are independently at each occurrence a C<SUB>1</SUB>-C<SUB>4 </SUB>alkyl, n and p are each an integer having a value of 1 to 4, and T is selected from the group consisting of C<SUB>5</SUB>-C<SUB>10 </SUB>cycloalkanes attached to the aryl groups at one or two carbons, C<SUB>1</SUB>-C<SUB>5 </SUB>alkyl groups, C<SUB>6</SUB>-C<SUB>13 </SUB>aryl groups, and C<SUB>7</SUB>-C<SUB>12 </SUB>aryl alkyl groups; a polycarbonate-polysiloxane copolymer; an impact modifier; and a flame retardant. The compositions have excellent chemical resistance as well as an improved balance of physical properties such as impact strength and spiral flow, while at the same time maintaining their good flame performance. |
