Sabic Innovative Plastics IP B.v.

General Electric Company

Sjef Berndsen

Patrick Joseph McCloskey

Edward Kung

Daniel Francis Lowery

Hans Peter Brack

Bernd Jansen

Paul Michael Smigelski, Jr

Jan Henk Kamps

Hans-Peter Brack

Dennis Karlik

Robert Walter Venderbosch

William A Kernick, Iii

Gerardo Hidalgo Llinas

Dennis Willemse

Michael Paul Smigelski

Daniel Lowery

A method of making polycarbonate includes the steps of forming polycarbonate by a melt transesterification method using an activated diaryl carbonate, and compounding the polycarbonate with a phosphorus-containing compound that has an abstractable proton or hydrolyzable group. The phosphorus-containing compound is compounded with the polycarbonate in an amount sufficient to result in an improvement in the color properties of the polycarbonate as compared to pellets formed from the same polycarbonate without addition of the phosphorus-containing compound.

Polycarbonate with reduced color

A method for preparing a molded article includes the steps of (a) obtaining a polycarbonate resin and (b) molding the polycarbonate resin. The polycarbonate resin is made by a transesterification reaction using an activated diaryl carbonate such that the polycarbonate is susceptible to the formation of internal ester linkages (IEL). The method occurs with the proviso that the polycarbonate resin, the molding conditions or both are selected to control the amount of IEL formed during the molding process to a level of less than 0.4 mol %.

Method for making molded polycarbonate articles with improved color

Disclosed are resinous compositions with excellent balance of impact, heat, flow and environmental stress crack resistance, comprising (i) at least one aromatic polycarbonate, (ii) at least one low molecular weight hydrocarbon resin derived from petroleum C&#x2013;Cfeedstock and (iii) optionally a second thermoplastic resin which is not polycarbonate resin, (iv) optionally a rubber modified graft copolymer, and (v) optionally a polymeric or non-polymeric organic phosphorus species. Also disclosed is a method for the manufacture of the compositions and for the manufacture of articles thereof.

Resinous compositions, method of manufacture thereof and articles fabricated from the composition

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Rilland, Netherlands

Sjef Berndsen