Polycarbonate compositions comprising polyester resins and ultra

Details Polycarbonate compositions comprising polyester resins and ultra Polycarbonate compositions comprising polyester resins and ultra

1997-08-27

1999-05-25

Mosley, Terressa

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528146, 528148, 528439, C08G 6400

Patent

active

059070269

ABSTRACT:
Weatherable polycarbonate compositions (formulations or blends) comprise polycarbonate, cycloaliphatic polyester resins, at least one of a benzotriazole, benzophenone, and triazine based UVA, and a catalyst quencher. The incorporation of the cycloaliphatic polyester resin and the benzotriazole, benzophenone, and triazine based UVA exhibits a synergistic effect, thereby resulting in unexpected enhanced protection of the polycarbonate compositions by imparting photostability to the polycarbonate formulations, thereby reducing yellowing or other forms of light induced degradation.

REFERENCES:
patent: 4544677 (1985-10-01), Allen et al.

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