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US 3,945,967 AGranted
Thermally stable polycarbonate composition
AssigneeGeneral Electric Company
InventorDonald B. G. Jaquiss
Life of this patent
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Abstract
A thermally stable polycarbonate composition comprising in admixture, an aromatic carbonate polymer and a stabilizing amount of an additive which is a combination of an epoxy compound prepared from an epichlorodydrin and the reaction product of an alkyl phosphite and the chlorine containing contaminant in said epoxy compound.
Claims4
A thermally stable polycarbonate composition comprising in admixture, an aromatic carbonate polymer and a stabilizing amount of an additive which is a combination of an epoxy compound prepared from an epichlorohydrin and represented by the following formula:
- ##EQU3## wherein R is selected from the group consisting of alkyl radicals of 1 to 24 carbon atoms, aryl radicals containing 1 to 3 aromatic rings and n is an integer of from 1 to about 10, and the reaction product of the chlorine containing contaminant in said epoxy compound and an alkyl phosphite represented by the following formula:
- P(OR.sub.1).sub.3
- wherein R.sub.1 is an alkyl radical of from 1 to about 10 carbon atoms;
- the reactants being employed in such proportions as to form the volatile alkyl chloride derivative from said contaminant and the alkyl radical of the phosphite.
1 more element
Dependencies are inferred from the claim text.