Block copolymers of polyphenylene oxides and non-sterically-hindered high molecular weight aromatic polycarbonates
AssigneeGeneral Electric Company
InventorsGeorge R. Loucks, John R. Campbell
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Abstract
This invention relates to block copolymers of polyphenylene oxides and non-sterically-hindered high molecular weight aromatic polycarbonates. These block copolymers can be molded, calendered, or extruded as films, sheets, fibers, laminates or other useful articles of manufacture.
Claims6
A process of forming a block copolymer of polyphenylene oxide and an non-sterically-hindered high molecular weight aromatic polycarbonate comprising the following process sequence:
- (1) Forming an agitated two-phase mixture comprising,
- (i) an organic phase containing a polyphenylene oxide, an nonsterically hindered-aromatic dihydroxy compound, an inert organic solvent, a tertiary amine, and, optionally, a sterically hindered-aromatic dihydroxy compound,
- (ii) an aqueous phase containing a solution of an alkali metal hydroxide having a pH value of at least 11,
- (2) Adding and reacting a carbonyl halide with both the polyphenylene oxide and the nonsterically hindered-aromatic dihydroxy compound plus any, optional sterically hindered-aromatic dihydroxy compound, to form a block copolymer and
- (3) Recovering the polyphenylene oxide and nonsterically hindered-aromatic polycarbonate block copolymer.
The claim process 1 wherein the nonsterically hindered-aromatic dihydroxy compound is present as a major portion relative to a minor portion of a sterically hindered-aromatic dihydroxy compound.
Dependencies are inferred from the claim text.