Patent ID: 11970608
Assignee: SHPP GLOBAL TECHNOLOGIES B.V.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A copolycarbonate composition comprising:
a copolycarbonate comprising bisphenol A carbonate units and second carbonate units of the formula, wherein
Ra and Rb are each independently a C1-12 alkyl, C1-12 alkenyl, C3-8 cycloalkyl, or C1-12 alkoxy,
each R3 is independently a C1-6 alkyl,
R4 is hydrogen, C2-6 alkyl, or phenyl optionally substituted with 1 to 5 C1-6 alkyl groups,
p, q, and j are each independently 0 to 4; and

wherein the composition further comprises a stabilizer package comprising:
a) a phosphorus-containing acid;
b) an ester of a phosphorus-containing acid; and
c) an organosulfonic stabilizer;
wherein the phosphorus-containing acid and the ester of the phosphorus-containing acid are present in the stabilizer package in a molar ratio of 1 to 2, and

wherein the total stabilization package in the composition is in the amount by weight of 4 to 32 parts per million.