Patent ID: 7524898
Filing Date: 2009-04-28
Classification: C08L

Abstract:
1. A thermoplastic molding composition comprising (a) polycarbonate, (b) polyalkylene terephthalate and (c) impact modifier exhibiting pH value of less than 7, a bimodal particle size distribution peaking at 50 nm and 550 nm and containing 1 to 500 ppm of sodium ions, characterized in its core/shell morphology, wherein the core contains polymerized butadiene structural units and shell contains polymerized methacrylate structural units, said core is present in an amount of 40 to 70 percent relative to the weight of the impact modifier, said shell having glass transition temperature greater than 23° C. excluding an impact modifier of which core contains copolymerized styrene where the weight ratio of methacrylate to said styrene is less than 1.5.