Polycarbonate films of low flammability and improved stress crac

Details Polycarbonate films of low flammability and improved stress crac Polycarbonate films of low flammability and improved stress crac

1987-11-16

1989-08-22

Hoke, Veronica P.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524611, C08K 542

Patent

active

RE0330329

ABSTRACT:
The present invention relates to polycarbonate films, and in particular extruded films and cast films, but preferably extruded films, which are characterized in that they contain about 0.01% to 2% by weight of a NH.sub.4 salt, alkali metal salt or alkaline earth metal salt of a perhalogenoalkanesulphonic acid, preferably a perfluoroalkanesulphonic acid.

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