General Electric Company

Edgar E Bostick

Niles R Rosenquist

Kenneth F Miller

Luca P Fontana

Christopher M Hawkins

Victor Mark

Thomas L Evans

James L Derudder

A polymeric composition having aromatic polycarbonate or aromatic polycarbonate like properties which process at significantly lower temperatures than aromatic polycarbonate in admixture with an additive which is incompatible with an aromatic polycarbonate at standard processing temperature.

Composition

Near-infrared stabilized copolyestercarbonate compositions

Silane esters are transesterified with hydroxyl-terminated polyester resins to obtain end-capped, extended or branched polyester molding compositions.

Endcapped, chain-extended and branched polyesters

Linear polyester are branched by transesterification with resins having repeating or recurring polymer chain units of the formula: ##STR1## wherein m, n and p are each independent integers of 0 or 1; R represents hydrocarbyl; and E represents alkylene containing from 1 to 15 carbon atoms, inclusive, halogen- substituted alkylene of 1 to 15 carbon atoms, inclusive, alkylene of 1 to 15 carbon atoms, inclusive, substituted with a --COOR group where R is as previously defined, or alkylene having 1 to 15 carbon atoms substituted with a monovalent group of the formula: ##STR2## wherein X represents one of hydrogen, hydrocarbyl or ##STR3## wherein R is as defined above; provided there is at least one moiety present, containing an R group.

Method of branching polyesters

Novel linear aromatic polycarbonate oligomers that contain one or more dicyclopentadiene dicarboxylate diradicals are described. These oligomers are prepared by the reaction of a cyclic aromatic polycarbonate oligomer with an alkali metal or magensium salt of a cyclopentadiene.

Cyclopentadiene-containing cyclic polycarbonate oligomer

Resinous compositions are prepared by the reaction of a composition comprising cyclic polycarbonate oligomers with at least one polyepoxide compound, in the presence of a polycarbonate formation catalyst. The cyclic polycarbonate oligomer composition is preferably a mixture of oligomers of varying degrees of polymerization, and the polyepoxy compound is preferably triglycidyl isocyanurate or a bis-epoxy-terminated bisphenol A-epichlorohydrin concentrate. There may also be present a polycarbonate crosslinking agent. The product of the reaction is a crosslinked polycarbonate network. The method is particularly useful in reactive processing operations such as reaction injection molding.

Cyclic polycarbonate-polyepoxide reaction product and method for their

An improved flame retardant polycarbonate composition of an aromatic carbonate polymer in admixture with an organic alkali metal salt or an organic alkaline earth metal salt which composition has in admixture therewith other organic alkali metal salt or organic alkaline earth metal salt such that the salt mixture contains at least two different cationic components.

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Mt. Vernon, IN, United States of America

Edgar E Bostick