General Electric Company

General Electric Corporation Gmbh

Charles V Hedges

Victor Mark

Niles R Rosenquist

Lawrence C Mitchell

Frederick Frank Holub

Novel heat resistant polycarbonates are provided which are the polymerized reaction products of:

Polycarbonates exhibiting improved heat resistance

Thermoplastic, linear, high molecular weight, end-capped aromatic polycarbonate polymers exhibiting improved heat resistance derived from:

Polycarbonate exhibiting improved heat resistance from cycloalkylidene

Linear thermoplastic polycarbonates derived from:

Polycarbonate exhibiting improved heat resistance from halogenated

A process for preparing aryl sulfone sulfonic acids by reacting an aryl sulfone in the molten state with sulfur trioxide under substantially anhydrous conditions.

Process for preparing aryl sulfone sulfonic acids

High molecular weight, thermoplastic, randomly branched polycarbonates of an aromatic dihydric phenol, a carbonate precursor, and a chain branching agent comprising at least one compound selected from the formula: ##STR1## where A is selected from alkylene radicals from 1 to 6 carbons, alkylidene radicals from 2 to 6 carbons, cycloalkylene radicals and cycloalkylidene radicals containing from 4 to 6 carbon atoms;

Branched polycarbonate from carboxy containing diphenol

A transalkylation process for the preparation of dihydric phenols comprising reacting, in the presence of an acid or base catalyst, at least one mole of an aromatic monohydroxy compound such as a phenol with at least one mole of an aromatic dihydroxy compound such as a dihydric phenol, thereby forming at least one dihydric phenol which is different than said aromatic dihydroxy compound.

Process for production of dihydric phenols

Thermoplastic polymer exhibiting improved heat resistance comprised of the polymerized reaction products of (i) a carbonate precursor, and (ii) at least one dihydric phenol represented by the general formula ##STR1## wherein: R is independently selected from alkyl radicals;

Polycarbonate from cycloalkylidene tetra alkyl substituted diphenol

Polyestercarbonates exhibiting improved heat resistance from

Aromatic copolyester-carbonates derived from a carbonate precursor, at least one difunctional carboxylic acid or a reactive derivative thereof, and at least one branched alkylidene dihydric phenol represented by the general formula ##STR1## wherein: R and R' are independently selected from halogen and monovalent hydrocarbon radicals;

Polyester carbonate from branched chain alkylidene dihydric phenol

Novel polycarbonates are provided which exhibit rubbery and elastomeric properties which are the polymerized reaction products of:

Dihydric phenols

Polycarbonates and polyester carbonates exhibiting improved heat

Copolyester-carbonate resin compositions exhibiting improved processability comprised of (i) at least one copolyester-carbonate resin derived from (a) a carbonate precursor; (b) at least one difunctional carboxylic acid or a reactive derivative thereof; and (c) at least one dihydric phenol wherein the bridging divalent hydrocarbon group connecting the two aromatic residues is represented by the general formula ##STR1## wherein R represents a straight chain alkyl radical containing from 1 to 5 carbon atoms.

Copolyester-carbonate compositions exhibiting improved processability

Polyarylate resin compositions exhibiting flame retardancy comprised of at least one polyarylate resin derived from:

Polyarylate resin of thiodiphenols and isophthalic acid or derivatives

This invention relates to phenolic compounds that have utility as branching agents for the manufacture of randomly branched polycarbonates.

Growing community of inventors

Mt. Vernon, IN, United States of America

Charles V Hedges