US Patent 7144935 Flame-resistant polycarbonate compositions containing phosphorus-silicon compounds

Patent 7144935 was granted and assigned to Bayer on December, 2006 by the United States Patent and Trademark Office.

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Patent Inventor Names

Andreas Seidel0

Dieter Wittmann0

Jochen Endtner0

Michael Wagner0

Thomas Eckel0

Wolfgang Ebenbeck0

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Patent abstract

A flame resistant poly(ester)carbonate composition is disclosed. The composition contains at least one phosphorus-silicon compound, the compound has a phosphorus content of 1 to 20% and a silicon content of 1 to 20%, and is characterized in that its weight loss (assessed by thermogravimetric analysis under nitrogen inert gas at a heating rate of 20° K/min,) at 280° C. is less than 30%. The preferred phosphorus-silicon compound is produced by thermal oligomerization from phosphorylated silanes.

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