General Electric Company

Donald I Craft

Willem F Borman

Morton Kramer

Karl J Balog

Mortor Kramer

A novel process is disclosed for preparing a high melt viscosity block co-polyester of at least two different linear polyesters. The process comprises melt blending the polyesters and, thereafter, subjecting the melt blended polyesters to a temperature of 10.degree.-50.degree. C. below the melting point of the lowest melting ingredient in the blend until the melt viscosity has increased to at least 10,000 poises at a temperature 10.degree.-15.degree. C. above the melting point of the blend.

Process of making a high melt viscosity block copolyester

A foamable thermoplastic injection moldable composition comprising in admixture (a) a polyester resin, (b) a filler selected from the group consisting of fibrous glass or a mineral or mixtures thereof in an amount of from about 5 to about 50 weight percent and (c) a minor amount of a foaming agent. The compositions can also include flame retardant additives.

Foamable polyester composition

Process of making a high melt viscosity block co-polyester

Ultraviolet light stable polyester resin compositions are provided by this invention. These compositions include as the stabilizer system, a stabilizing amount of a hydroxybenzotriazole ultraviolet light absorber.

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Pittsfield, MA, United States of America

Donald I Craft