Patent ID: 8309656

Claim:
A composition comprising from 50 to 55 weight percent of a copolyetherester elastomer comprising: a modified, random polybutylene terephthalate copolymer block that is derived from a polyethylene terephthalate component selected from the group consisting of polyethylene terephthalate, polyethylene terephthalate copolymers, and combinations thereof; and that contains at least one residue derived from the polyethylene terephthalate component; and a polybutylene oxide copolymer block that is derived from the polyethylene terephthalate component and poly(1,4-butylene oxide) glycol, and that contains poly(1,4-butylene oxide) and at least one residue derived from the polyethylene terephthalate component; wherein the copolyetherester elastomer comprises 30 to 60 weight percent of units derived from poly(1,4-butylene oxide) glycol, based on the weight of the copolyetherester elastomer, and 5 to 40 mole percent isophthalic acid units, based on the total number of terephthalic acid units and isophthalic acid units in the copolyetherester elastomer; from 45 to 50 weight percent of a polycarbonate of the formula wherein at least 60 percent of the total number of R 1 groups are aromatic organic radicals and the balance thereof are aliphatic, alicyclic, or aromatic radicals, and wherein the polycarbonate further comprises repeating structural units of the formula wherein each R is independently at each occurrence a monovalent organic radical having 1 to 13 carbon atoms, and E is an integer greater than or equal to 2; wherein the at least one residue derived from the polyethylene terephthalate component comprises diethylene glycol groups in an amount ranging from 0.1 to 10 mole %, based on 100 mole % of glycol functionality in the copolyetherester elastomer; and wherein an article molded from the composition and having a thickness of 3.2 mm has a transmission of 35% or higher, measured in accordance with ASTM D1003-00.