Patent ID: 7144935

Claim:
A poly(ester)carbonate composition comprising a poly(ester) carbonate and at least one phosphorus-silicon compound, said compound having a phosphorus content of 1 to 20% and a silicon content of 1 to 20%, and characterized in that its weight loss assessed by thermogravimetric analysis under nitrogen inert gas at a heating rate of 20° K/mm, at 280° C. is less than 30% the cited percents, all occurrences, referring to the weight of the phosphorus-silicon compounds, wherein the phosphorus-silicon compound conforms to general formula (III), wherein R 1 mutually independently represents hydrogen or C 1 –C 4 alkyl, R 2 represents a member selected from the group consisting of aryl radical, alkyl radical, aryloxy radical, alkoxy radical and hydrogen and R 3 mutually independently represents a member selected from the group consisting of alkyl radical, aryl radical and aryl radical substituted with C 1 –C 4 alkyl and m denotes 2 to 1000.