Patent ID: 7999037

Claim:
A thermoplastic composition comprising: a polycarbonate terpolymer (A) having repeating units derived from three different monomers (I), (II), and (III), wherein monomer (I) is 2-phenyl-3,3-bis(4-hydroxyphenyl)phthalimidine (PPPBP); and monomers (II) and (III) are each a dihydroxy compound of formula (I): wherein each R k is independently a halogen atom, a C 1 - 10 hydrocarbon group, or a C 1-10 halogen substituted hydrocarbon group, and n is 0 to 4, monomer (II) being different from monomer (III); and an impact modifier (B) selected from the group consisting of acrylonitrile-butadiene-styrene (ABS) and methacrylonitrile-butadiene-styrene (MBS) resins, and mixtures thereof; wherein the thermoplastic composition has a percent retention of tensile elongation of at least 80 percent upon exposure to Fuel C, 0.5% strain, for 2 days according to ISO 4599; wherein the polycarbonate polymer (A) has a glass transition temperature of 165° C. or greater; and wherein the ratio of monomer (II) to monomer (III) is from about 3:4 to about 4:3 and the polycarbonate terpolymer contains about 80 mole percent of monomers (II) and (III) combined.