Decolorization of polycarbonate resins
AssigneeGeneral Electric Company
InventorsDonald A. Bolon, John E. Hallgren
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Abstract
Polycarbonate resins which have been polymerized employing titanates as polymerizing agents generally have characteristic undesirable color. Removal of this color is accomplished by treatment of the polycarbonate resin with a quantity of an organic acid anhydride, optionally employing a smaller amount of a mineral acid, in addition for lower temperature decolorization.
Claims11
A process for decolorizing a polycarbonate resin containing a titanate ester of formula Ti(OAr).sub.4, where Ar is an aryl group, comprising (1) reacting said titanate ester with at least a stoichiometric amount of an organic acid anhydride.
Dependencies are inferred from the claim text.