Patent ID: 8030400
Filing Date: 2011-10-04
Classification: C08L

Abstract:
1. A thermoplastic composition comprising: from about 10 to about 85 wt. % of a polycarbonate terpolymer comprising structures derived from at least one of each of structures (I), (II) and (III), wherein (I) is a dihydroxy compound having the structure (A): wherein n is 0 to 4 and R (II) comprises a second dihydroxy compound derived from Formula (A) and different from (I) and wherein n and R (III) a third dihydroxy compound not derived from Formula (A), wherein the sum of the mol percent of all of structures (I) and (II) is greater than 45% relative to the sum of the molar amounts of all of structures (I), (II) and (III) in the polycarbonate terpolymer and wherein the polycarbonate terpolymer is amorphous; from about 5 to about 45 wt. % of an impact modifier; and from about 10 to about 45 wt. % of an ungrafted rigid copolymer, wherein the sum of the polycarbonate terpolymer, the impact modifier and the ungrafted rigid copolymer equals 100 wt. %, and wherein the composition has a scratch resistance that is better than the same composition using a standard BPA polycarbonate in lieu of the polycarbonate terpolymer when measured according to ISO 1518 at a constant load of 6 N and a chemical resistance that is better than the same composition using a standard BPA polycarbonate in lieu of the polycarbonate terpolymer when measured as the percent retention of Tensile Elongation evaluated according to ISO 4599 using injection 4 mm thick molded tensile bars and wherein the chemical resistance is among one or more of an insect repellant having active ingredients of 200 g/kg N,N-diethyl-m-toluamide and 435 g/kg ethanol, ethyl acetate or a 50/50 mixture by volume of toluene and isooctane.