General Electric Company

Eugene P Reilly

Willem F Borman

Morton Kramer

Shaped articles comprising a branched, high molecular weight poly(alkylene terephthalate) polyester resin and obtained by providing a molten, self-supporting preform of the resin, shaping the molten preform into a final form and allowing the shaped preform to cool to structural rigidity.

Shaped articles and process for the production thereof

Poly(alkylene terephthalates) are prepared by an improved process which provides high molecular weight, in a shortened reaction time, without excessive loss of the diol reactant to side reactions. In the process an excess of the diol reactant is heated with a mixture of the corresponding dialkyl terephthalate and from 5 to 95 mole % of terephthalic acid, based on the mixture.

Production of polyesters

High molecular weight polyesters, such as poly(alkylene terephthalates), are stabilized against deterioration by heat, oxidation, and the like, with a stabilizer comprising a polybutadiene, with high vinyl content. Also provided are reinforced embodiments of the stabilized compositions.

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Pittsfield, MA, United States of America

Eugene P Reilly