General Electric Company

Donald B Jaquiss

Victor Mark

John A Tyrell

Robert J Axelrod

Walter L Hall

Lawrence C Mitchell

Russell J McCready

Arnold Factor

Howard A Vaughn, Jr

Steven W Scott

Joseph B Williams

Thornton R Calkins

Novel flame retardant agents comprise polyalkylene oxides or a derivative thereof and end-capped with brominated phthalimide groups, and have the general formulae ##STR1## R.sup.1 is alkylene of from about 2 to about 6 carbon atoms; R.sup.1 is alkyl of from about 1 to about 6 carbon atoms; n is from about 4 to about 40; n' is from about 3 to about 15; and n' is from about 1 to about 10. Thermoplastic compositions, for example, polyphenylene ether compositions, rendered flame retardant with the novel compounds have a high resistance to additive vaporization and surface liquid exudation as well as desirable high flow characteristics.

Flame retardant compounds and thermoplastic compositions containing the

Novel flame retardant agents comprise polyalkylene oxides or a derivative thereof end-capped with brominated phthalimide groups, and have the general formulae

Compositions comprising predominately a polycarbonate resin, e.g., poly(bisphenol A carbonate), and a polyester resin, e.g., poly(1,4-butylene terephthalate), alone, or in combination with one or more second resins, are melt stabilized with monosodium phosphate and/or monopotassium phosphate.

Stabilized polycarbonate-polyester compositions

An interfacial polymerization process for preparing a high molecular weight aromatic carbonate polymer by reacting a dihydric phenol with a carbonate precursor in the presence of a catalytic amount of a substituted pyridine or a salt of a substituted pyridine.

Process for preparing polycarbonates using substituted pyridine catalysts

An interfacial polymerization process for preparing high molecular weight aromatic polycarbonates by reacting a dihydric phenol with a carbonate precursor in the presence of a catalytic amount of a cyclic amidine.

Process for preparing polycarbonates using cyclic amidine catalysts

An interfacial polymerization process for preparing high molecular weight polycarbonates by reacting a dihydric phenol with a carbonate precursor in the presence of a catalytic amount of a non-cyclic amidine.

Process for preparing polycarbonates using amidine catalysts

An interfacial polymerization process for preparing high molecular weight aromatic polycarbonates by reacting a dihydric phenol with a carbonate precursor in the presence of a catalytic amount of an amino amidine or amino guanidine.

Process for preparing polycarbonates using amino guanidine or amino

A thermal oxidative stabilized polycarbonate composition comprises in admixture (a) a high molecular weight aromatic carbonate polymer and (b) a minor amount of an end-blocked polyorganohydrogen siloxane and, optionally, an organic phosphite or phosphonite and/or epoxy compound.

Stabilized polycarbonate compositions

A process is disclosed for the production of 2,2-bis(4-hydroxyphenyl) propane, herein referred to as bisphenol-A, from by-products remaining after purification distillation of bisphenol-A produced from a condensation reaction of phenol and acetone. The process comprises mixing the by-products with phenol and treating the resulting mixture with anhydrous hydrogen bromide to isomerize those by-products isomerizable to bisphenol-A for subsequent recovery.

Process for preparing 2,2-bis(4-hydroxy-phenyl) propane from

A non-opaque flame retardant polycarbonate composition comprising in admixture an aromatic carbonate polymer and an additive which may be the organic cationic salts of either monomeric or polymeric unsubstituted or substituted aliphatic, aromatic or heterocyclic sulfonic acids and inorganic acids.

Non-opaque flame retardant polycarbonate composition

An aromatic polycarbonate composition that is color stable, which composition consists of an aromatic polycarbonate resin having in admixture therewith 0.005 - 0.5 weight percent of a phosphine and with or without an epoxy compound and a pigment.

Stabilized polycarbonate resin

A thermally stable polycarbonate composition comprising in admixture, an aromatic carbonate polymer and a stabilizing amount of an additive which is a combination of an epoxy compound prepared from an epichlorodydrin and the reaction product of an alkyl phosphite and the chlorine containing contaminant in said epoxy compound.

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New Harmony, IN, United States of America

Donald B Jaquiss