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US 5,470,938 AGranted
Copolymeric polycarbonate compositions containing a sulfonic acid compound
AssigneeGE Plastics Japan, Ltd.
InventorsTakeshi Sakashita, Tomoaki Shimoda, Kotaro Kishimura
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Abstract
A copolymeric polycarbonate containing repeating constituent units having formula [I] below and repeating constituent units having formula [II] below in a molar ratio of from 98:2 to 40:60. ##STR1## The above-described copolymeric polycarbonates have excellent resistance to chemicals, heat resistance and flame retardancy without compromising the impact resistance and good hues intrinsic to polycarbonates.
Claims5
A copolymeric polycarbonate composition consisting of:
- [A] a copolymeric polycarbonate containing repeating constituent units having the formula ##STR9## and repeating constituent units having the formula ##STR10## in a molar ratio of I:II of from 98:2 to 40:60, and [B] 0.05-10 ppm, based on copolymeric polycarbonate [A], of a sulfonic acid compound having formula [V] below ##STR11## where R.sup.7 is a hydrocarbon group in which the hydrogens may be substituted with halogens) having 1-6 carbons;
- R.sup.8 is a hydrocarbon group in which the hydrogens may be substituted with 1-8 carbons having 1-8 carbons;
- and n is an integer from 0 to 3.
Dependencies are inferred from the claim text.