General Electric Company

W. R. Grace Co.

Donald C Clagett

Sheldon J Shafer

Louis M Maresca

Daniel W Fox

Kenneth Paul Blackmon

Paul Dean Sybert

Tohru Takekoshi

G Fred Willard

Ronald J Gambale

Stephen M Cooper

Peter H Scott

Michael J Svetly

Uwe S Wascher

David M Handler

Copolymers comprising amide units and ester units are prepared by melt phase interchange of diaryl esters of dicarboxylic acids and diamines with dihydric alcohols and diesters of aromatic dicarboxylic acids. The products are tough resins, useful per se as molding compounds, and to compatibilize and toughen other thermoplastic polymers.

Amide-ester copolymers and process for the preparation thereof

Thermoplastic resins of enhanced solvent resistance especially useful for packaging or automotive parts comprising blends of amorphous polyamides with a thermoplastic polyester resin, substantially free of a polyarylate have excellent physical properties and barrier resistance to oxygen and carbon dioxide. Preferred blends comprise polyesters prepared by reacting a dihydric alcohol with a dicarboxylic acid, and amorphous polyamides prepared from non-symmetric monomers comprising odd-number chain diamines and diacids, and meta aromatic diamines and diacids.

Blends of thermoplastic polyester resins and amorphous polyamides

Thermoplastic blends of a polyamide having low amine end-group concentration and a polymer containing ester or carbonate linkages. The blends are useful in providing molded parts having improved properties such as improved impact strength.

Thermoplastic blends of a polyamide having low amine end-group

Copolymers comprising amide units and urea units are prepared by melt phase interchange of diaryl esters of dicarboxylic acids with diamines and diesters of carbonic acid with diamines. The products are tough resins, useful per se as molding compounds, or in blends with other thermoplastic polymers.

Amide-urea copolymer and process for the preparation thereof

An aromatic polyphthalatecarbonate resin having a small percentage of phthalate units therein exhibits improved resistance to hazing and yellowing upon exposure to ultraviolet radiation. The polyphthalate carbonate resin is derived from the reaction products of a phthalate compound, a dihydric phenol and a carbonate precursor.

Ultraviolet radiation resistant polyphthalatecarbonate resin

Polyamides obtained by low pressure melt processing involving reactions of diesters of dicarboxylic acids with 1,3-diaminopropane. The polyamides are useful as molding resins.

Polyamide from 1,3 propylene diamine and isophthalic acid compound

A process for minimizing the formation of color during preparation of polyamides by interchange of diesters of dicarboxylic acids with diamines in the presence of hypophosphorous acid.

Color minimization during melt preparation of polyamides with

A container comprised of an inner aromatic polycarbonate layer, an outer aromatic polycarbonate layer, and an intermediate amorphous polyamide layer between the inner polycarbonate layer and the outer polycarbonate layer. The amorphous polyamide intermediate layer provides the container with enhanced processability, excellent gas barrier properties and hot fill capabilities.

Polycarbonate container having internal layers of amorphous polyamide

A polyphthalatecarbonate/polycarbonate blend exhibits improved resistance to hazing and yellowing from prolonged exposure to ultraviolet radiation. The blend is useful in the production of transparent, ultraviolet radiation stable sheets and films.

Polyphthalatecarbonate/polycarbonate resin blends

Thermoplastic blends of amorphous polyamide with a resin selected from the group consisting of polycarbonate, poly(ester-carbonate), and polyarylate have excellent physical properties.

Thermoplastic blends comprising polycarbonate resin and amorphous

Copolyimides having good solvent resistance, thermal stability and processability contain about 2-50 mole percent of structural units derived from a tetracarboxybiphenyl, in combination with other structural units typically derived from bisphenol A dianhydride.

Novel copolyimides and polyamic acid precursors therefor

Bioimplant three dimensional latice of hydrophilic polyurethane having a backbone of polyetherol or polyesterol, end-capped with aliphatic or aromatic diisocyanate, chain branched with polyol and bound into a latice by chain extension alkyl diols. The method of producing such a latice. An extension would be the use of the latice for other medical and veterinary purposes.

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Pittsfield, MA, United States of America

Donald C Clagett