General Electric Company

George R Loucks

Dwain M White

John Robert Campbell

Gary R Faler

Frank J Williams, Iii

Charles M Orlando

A new class of polymer blends comprising (I) block copolymers of polyphenylene oxides and sterically-hindered aromatic polycarbonates and (II) vinyl aromatic resins.

Polyphenylene oxide blends

This invention relates to block copolymers of polyphenylene oxides and sterically-hindered aromatic polycarbonates. These block copolymers can be molded, calendered, or extruded as films, sheets, fibers, laminates or other useful articles of manufacture.

Block copolymers of polyphenylene oxides and sterically-hindered

This invention relates to block copolymers of polyphenylene oxides and non-sterically-hindered high molecular weight aromatic polycarbonates. These block copolymers can be molded, calendered, or extruded as films, sheets, fibers, laminates or other useful articles of manufacture.

Block copolymers of polyphenylene oxides and non-sterically-hindered

A sulfonated polystyrene ion-exchange resin is provided having organo mercaptan groups attached to backbone sulfone radicals by covalent nitrogen-sulfur linkages. The ion-exchange resin can be used to effect phenol-ketone condensation in the synthesis of bisphenols.

Method and catalyst for making bisphenol

This invention relates to block copolymers of polyphenylene oxides and polyformals of sterically-hindered dihydric phenols. These block copolymers can be molded, calendered, or extruded as films, sheets, fibers, laminates or other useful articles of manufacture.

Block copolymers of polyphenylene oxides and polyformals of

The invention relates to block copolymers of polyphenylene oxides and polyformals of non-sterically-hindered dihydric phenols. These block copolymers can be molded, calendered, or extruded as films, sheets, fibers, laminates or other useful articles of manufacture.

Block copolymers of polyphenylene oxides and polyformals on

This invention relates to formal-coupled polyphenylene oxides. These new polymers can be molded, calendered, or extruded as films, sheets, fibers, laminates or other useful articles of manufacture.

Formal-coupled polyphenylene oxides

Polycarbonate copolymers are provided consisting essentially of chemically combined bisphenol carbonate units and having from about 5 to 70 mole percent of such chemically combined bisphenol carbonate units in the form of o,p'-bisphenol dichloroethylene carbonate units. The polycarbonate copolymers have been found to possess valuable flame retardant properties and improved processability.

Polycarbonate copolymers

A method is provided for making linear film forming aromatic polyformals having a reduced percent by weight of aromatic polyformals in the cyclic state. Reduced cyclic polyformal content in the linear aromatic polyformal is achieved by a filtration of the reaction product of a bisphenol and methylene halide in the presence of an alkali metal hydroxide, followed by the addition of an antisolvent to the reaction mixture to effect reverse precipitation.

Method for making aromatic polyformals

A process of forming linear, branched and/or cross-linked urethane-coupled polymers of quinone-coupled polyphenylene oxides is described which comprises contacting in a high fluid shear stress reaction medium a polyfunctional isocyanate with a quinone-coupled polyphenylene oxide having an average hydroxyl group per molecule value greater than zero including 2.0 or less, and optionally, additionally, a polyphenylene oxide having an average hydroxyl group per molecule value greater than zero including 1.0 or less.

Process of forming urethane-coupled polymers of quinone-coupled

A process is disclosed which provides for an increase in the oxidative and/or thermal stability of quinone coupled polyphenylene oxides which comprises contacting quinone-coupled polyphenylene oxides with a capping agent in the presence of a water soluble base, and a catalytic phase transfer agent. The resulting new polymers have improved color and in combination with styrene resins provide thermoplastic compositions having improved chemical and physical properties.

Process for capping quinone-coupled polyphenylene oxides

A process of forming linear, branched and/or cross-linked acyl-coupled polymers of quinone-coupled polyphenylene oxides is described which comprises contacting di- and/or tri-functional acyl halides with quinone-coupled polyphenylene oxides having an average hydroxyl group per molecule value greater than zero including 2.0 or less.

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Scotia, NY, United States of America

George R Loucks