General Electric Company

Adrianus Alphonsus Kusters

Patrick Joseph McCloskey

Theodorus L Hoeks

Ye-Gang Lin

Raphael Mestanza

Pin-pin Wu

Pin-Pin Wu

The disclosure describes reacting a multi-functional phenolic or carboxylic branching agent with a transesterification catalyst to form an organic salt prior to reactive extrusion of said organic salt branching agent with linear polycarbonate resin as a means to dramatically increase the efficiency of the branching agent in the preparation of branched polycarbonate.

Method of branching and cross-linking a polycarbonate resin

Branched polycarbonates are prepared by the reaction of a linear or branched polycarbonate with a branching resin having a molecular weight up to about 3,000, typically a novolak or a bisphenol polymer. The reaction preferably takes place in the presence of a carbonate equilibration catalyst such as a quaternary bisphenolate.

Polyphenols as polycarbonate branching agents

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Chaam, Netherlands

Adrianus Alphonsus Kusters