Standard Oil Company (indiana)

Amoco Corporation

Ronald E Bockrath

Gary T Brooks

Bill W Cole

Robert G Keske

Robert B Hanson

Carl Serres

Gary R Chipman

Gary A Gustafson

Edward J Gordon

Russell V Malo

Improved imide-containing copolymers comprising, in the aromatic diamine component, p-phenylene diamine and at least one additional aromatic diamine have increased rigidity and useful processability. The copolymers of this invention also may exhibit improved resistance to the detrimental effects of humid environments and retain mechanical properties at elevated temperatures after exposure to humid environments.

High moduli polyimides

Composites comprising polyamide-imide matrix resins derived from trimellitic acid compounds and an aromatic diamine are improved in moisture resistance when from 10 to about 90 mole % of the trimellitic acid compounds are replaced by biphenyl tetracarboxylic acid compounds.

Fiber-reinforced composites comprising amide-imide copolymer matrix resin

Polyamide-imide compositions, including amic acid precursors thereto, having in their molecules recurring units based on aromatic tri- and tetracarbonyl moieties joined by a bisphenoxyphenyl structure exhibit a desirable combination of chemical, mechanical and thermal properties and retention of these properties on exposure to elevated temperatures even after saturation with water.

Polyamide-imide composition based on bisphenoxyphenyl diamines

Polyamide-imides derived from trimellitic acid compounds and an aromatic diamine are improved in moisture resistance when from 10 to about 90 mole % of the trimellitic acid compound is replaced by a biphenyl tetracarboxylic acid compound.

Amide-imide resin of lowered water absorption for molding and composite

Polyamide-imide compositions from bisphenoxyphenyl diamine tricarboxylic

Injection moldable homopolymers, copolymers, and terpolymers are prepared from fully or partially acylated aromatic diamines, aliphatic diamines or a mixture of these and aromatic tricarboxylic anhydride compounds or mixtures of tricarboxylic anhydrides and dicarboxylic acids. These polymers are improved by the addition of calcium moieties such as oxide, calcium acetate and calcium hydroxide. These polymers are useful for the preparation of injection molded articles.

Injection moldable amide-imide polymers containing calcium moieties

Injection moldable amide-imide homopolymers and copolymers containing metal oxides capable of forming hydrates stable at temperatures in excess of 500.degree. F. These amide-imides are useful in engineering plastics applications.

Injection moldable amide-imide polymers and copolymers containing metal

Aqueous crystallization of polyester, particularly copolymeric polyethylene terephthalate in the presence of surface active agents.

Aqueous crystallization of polyester

A horizontal, agitated, twin-shaft, jacketed vessel with adjustable vanes performs the functions of drying, crystallization, and solid phase polymerization for upgrading prepolymer particles.

Process for upgrading prepolymer particles

Solid state polymerization of relatively low I.V. polyester using a water-soluble anti-stick agent.

Solid state polymerization

Solid state polymerization of relatively low I.V. polyester using an organic crystalline anti-stick agent having a melting point of at least 230.degree. C.

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Oswego, IL, United States of America

Ronald E Bockrath