Patent ID: 9260604
Filing Date: 2016-02-16
CPC Classification: C08L

Claim Text:
1. An impact resistant polycarbonate composition having improved resistance to polymer degradation comprising an aromatic polycarbonate in admixture with an elastomer-modified graft copolymer that is a product of a process comprising emulsion polymerization in the presence of an electrolyte that is a potassium or sodium salt of an anion selected from the group consisting of phosphate or bicarbonate, and combinations thereof, wherein the elastomer-modified graft copolymer in the impact resistant polycarbonate composition contains residual amounts of the electrolyte; wherein after aging in an oven for 1000 hours at 90±2° C. and 95±3% RH, the melt flow rate (MFR) of the polycarbonate composition does not change by more than 5.0 g/10 minutes units measured in accordance with ISO 1133 standard at 230° C. using a 3.8 kg load and 300 sec dwell time.