General Electric Company

General Electric Corporation Gmbh

Daniel Edwin Floryan

Glenn D Cooper

Fred F Holub

Dwain M White

Daniel W Fox

Michael G Minnick

Robert W Smearing

Manfred Doser

Irwin Schraga

James W Watson

Paul Caswell Fruscione

Justin Walter Gucz

Thermoformable composites comprised of polycarbonate/woven glass cloth and methods for their preparation are provided which have good flammability characteristics and physical properties and are suitable for use in aircraft interiors.

Thermoformable/polycarbonate/woven glass cloth composites

The present invention relates to a foamable polyetherimide resin. These foamable polyetherimides have an effective amount of a chemical blowing agent which decomposes at a temperature equal to or greater than the glass transition temperature of the polyetherimide resin and does not have an adverse effect on the polyetherimide.

Foamable polyetherimide resin formulation

This invention is concerned with amide ether imide block copolymers and a method for their preparation. These block copolymers exhibit excellent glass transition temperatures which are suitable for the manufacture of filaments, fibers, films, coatings and molding compounds.

Amide ether imide block copolymers

Disclosed are blends of two or more polyetherimides. Such blends generally exhibit a high glass transition temperature, e.g., from about 125.degree. to about 210.degree. C., which makes the blends particularly suitable for automotive and appliance applications.

Polyetherimide blends

An improved method for the preparation of polyphenylene oxides is disclosed. The method comprises using a diamine catalyst system comprising a cupric compound, coupling the phenolic monomer in the absence of methanol, and adding a promoter to the reaction mixture.

Preparation of polyphenylene ether resins

An improved method is provided for the recovery of a friable crumb-form of resinous compositions comprising polyphenylene ethers. The method comprises polymerization of a monohydric phenol, removal of the catalyst employed, heating, I.V. stabilization, optionally, capping, and product recovery.

Process for isolation of polyphenylene ether resin by crumbing in hot

There is provided a process for improving the color of resinous compositions consisting of, or including, polyphenylene ether resins by contacting such resins with an amine. The process is carried out generally at elevated temperatures and pressures with either a primary, secondary or tertiary amine.

Process for improving the color of resinous compositions

Ethylenediaminetetraacetic acid (EDTA)-complexed heavy metals alone or together with free EDTA salts are removed from solution in a mixture comprising a solvent for a polyphenylene ether resin, an antisolvent for a polyphenylene ether resin and water, by contacting the mixture with alumina for a time at least sufficient to selectively adsorb the metal-EDTA complex and free EDTA salts and recover the mixture of solvent, antisolvent and water substantially free of the metal-EDTA complex and EDTA salts. The alumina can be regenerated to nearly its full original adsorption capacity by contacting with water at a neutral or nearly neutral pH, to give an aqueous solution of the metal-EDTA complex and free EDTA salts.

Process for removing metal-EDTA complex and free EDTA salts from mixed

Polyphenylene ethers produced by an oxidative coupling of a phenol in the presence of an oxygen-containing gas and a metal-amine complex catalyst are freed of catalyst and stabilized against molecular weight loss. Removal of the metal component and molecular weight loss control are effected by contacting the reaction mixture with an aromatic amine plus a metal chelating agent, which stabilizes the intrinsic viscosity of the polyphenylene ether in the reaction mixture. This procedure results in lower catalyst usage and shorter reaction time.

Intrinsic viscosity control of polyphenylene ether reaction mixtures

Polyphenylene ethers produced by an oxidative coupling of a phenol in the presence of an oxygen-containing gas and a metal-amine complex catalyst are freed of catalyst and stabilized against molecular weight loss. Removal of the metal component and molecular weight loss control are effected by contacting the solution with a compound capable of selectively complexing with the metal in combination with a dihydric phenol and a mild reducing agent. The process is less expensive than prior art procedures because less dihydric phenol is needed, and the metallic residue content of the polyphenylene ether is reduced to very low levels.

Molecular weight control of polyphenylene ethers

A process for the recovery of copper catalyst from the polymerization of polyphenylene ethers comprises forming a complex of the catalyst and an amino acid chelating agent, separating the complex from the polymerization mixture, contacting the complex with a reducing sugar in an alkaline medium to precipitate the copper as an oxide and, optionally, acidifying the alkaline medium to precipitate and recover the amino acid chelating agent.

Process for recovery of catalyst from polymerization of polyphenylene

A novel process is disclosed for the removal of catalyst residues from organic solutions of polyphenylene oxides. The process comprises adding a nitrogenous salt of nitrilotriacetic acid to a polyphenylene oxide reaction mixture and thereafter adding an antisolvent for polyphenylene oxide to the mixture to cause the polyphenylene oxide to precipitate.

Removal of catalyst from polyphenylene oxide reaction mixtures with

A novel process is disclosed for the preparation of a polyphenylene oxide resin wherein the copper catalyst is extracted by the use of a salt of ethylenediaminetetraacetic acid and a quaternary ammonium salt. The process results in a decrease of the residual copper which is carried over into the polyphenylene oxide resin.

Extraction of copper catalyst from polyphenylene oxide solutions

A novel process for the separation of catalyst residues from polyphenylene ether reaction systems is disclosed. The process is based on the discovery that an aqueous solution of a water soluble bisulfate will extract a complex copper-amine catalyst from a reaction solution of a polyphenylene ether resin.

Catalyst removal from polyphenylene ether reaction solutions by

This invention provides a novel method for the removal of the catalyst from a polyphenylene oxide polymerization mixture. The novel method is based on the discovery that ammonia and carbon dioxide may be employed to extract the catalyst from a polyphenylene ether reaction mixture.

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Glenmont, NY, United States of America

Daniel Edwin Floryan