Sabic Innovative Plastics IP B.v.

Dennis Willemse

Jan Henk Kamps

Hans-Peter Brack

Patrick Joseph McCloskey

Paul Michael Smigelski, Jr

Edward Kung

Martin H Oyevaar

Daniel Francis Lowery

Hans Looij

Hans Peter Brack

Bernd Jansen

Maarten Antoon Jan Campman

Laurus Van Der Wekke

Yohana Perez De Diego

Sjef Berndsen

Han Vermeulen

Bernard Jansen

Michael Paul Smigelski

Daniel Lowery

Disclosed herein is a polycarbonate comprising a terminal olefin group of the formula wherein Ris a C-Chydrocarbon that can be unsubstituted or substituted with a halogen, olefin, ether, ketone, or C-Cpolyoxyalkylene functionality in which the alkylene groups contain 2 to 6 carbon atoms, Rto Rare each independently a hydrogen or a C-Chydrocarbon that can be unsubstituted or substituted with a halogen, olefin, ether, ketone, or a C-Cpolyoxyalkylene functionality in which the alkylene groups contain 2 to 6 carbon atoms, and optionally wherein any two of Rto Rtogether form a monocyclic, bicyclic, or tricyclic ring system optionally substituted with a heteroatom in each ring.

Polycarbonate resins method of manufacture, and articles formed therefrom

A non-reactive monomer mixture is formed from a dihydroxy component having one or more dihydroxy compounds dissolved in a melted diaryl carbonate. The dihydroxy component has less than 600 ppb alkali metal, an acid stabilizer, or both less than 600 ppb alkali metal and an acid stabilizer. The dihydroxy compounds of the dihydroxy component and the diaryl carbonate are present in a mole ratio of from 0.9 to 1.1. The monomer mixture is at a temperature between the saturation point of the monomer mixture and the highest melting temperature of the individual dihydroxy compounds. The non-reactive monomer mixture can be stored and transported and then polymerized to form polycarbonate upon addition of a catalyst.

Monomer solution for producing polycarbonate

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

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Standdaarbuiten, Netherlands

Dennis Willemse