Polycarbonate compositions comprising hindered amine light stabi

Details Polycarbonate compositions comprising hindered amine light stabi Polycarbonate compositions comprising hindered amine light stabi

1997-11-25

2000-02-29

Sanders, Kriellion

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524 91, C08K 53492

Patent

active

060310332

ABSTRACT:
Weatherable polycarbonate compositions (formulations or blends) comprise at least one of a piperazinone and piperazine dione based HALS, and polyether based. The combination of these HALS and polyether based polymers exhibits a synergy that results in enhanced protection of the polycarbonate compositions by imparting photostability to the polycarbonate formulations, thereby reducing yellowing or other forms of light induced degradation.

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Hill et al., J. Phys.: Condens. Matter 8, "A Free Volume Approach to the Mechanical Behaviour of Miscible Polycarbonate Blends", pp. 3811-3827.

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