Patent ID: 8575367

Claim:
A polycarbonate one or more repeat units IA, IB, or a combination thereof: wherein R 1 is a divalent linear, branched, or cyclic alkyl group having 1 to 36 carbon atoms, a linear or branched alkenyl group having 1 to 36 carbon atoms, an aryl group, or an alkaryl group having from 7 to 36 carbon atoms; R 2 is a covalent bond or a linear, branched, or cyclic alkyl group having 1 to 18 carbon atoms, a linear or branched alkenyl group having 1 to 18 carbon atoms, an aryl group, or an alkaryl group having from 7 to 18 carbon atoms; R 3 is hydrogen, alkynyl, or a linear, branched, or cyclic alkyl group having 1 to 18 carbon atoms, a linear or branched alkenyl group having 1 to 18 carbon atoms, an aryl group, or an alkaryl group having from 7 to 18 carbon atoms; R 4 is a group having the formula wherein a is 0 or 1 and R 5 , R 6 , R 7 , R 8 , R 9 , and R 10 are independently hydrogen, alkynyl, or linear, branched, or cyclic alkyl groups having 1 to 18 carbon atoms, linear or branched alkenyl groups having 1 to 18 carbon atoms, aryl groups, or alkaryl groups having from 7 to 18 carbon atoms; α and α′ are independently integers of 1 to about 100; and γ is an integer of 1 to about 30 and γ is the same or different for repeat unit IA and repeat unit IB.