General Electric Company

Chevron Chemical Company LLC

Seldon L Dotson

Chen-Youn Sue

Michael J Hanner

Larry B Simmons

Loren K Gibbons

Jason J Miller

Jeffrey Silloway

In the present invention, a process is provided for producing high impact polystyrene of improved heat resistance. According to the invention, after phase inversion of the rubber-polystyrene system, a slurry of PPE in styrene is added in situ to the process. The PPE slurry in styrene contains greater than 15 wt. % of PPE and is introduced to the process at point past rubber phase inversion, preferably at point where total polymer solids is greater than 40 wt. % of the total weight of the polymerization mixture. Preferably, four continuous stirred tank reactors in series are used in the process and preferably the slurry of PPE in styrene monomer is introduced to the third CSTR.

High impact polystyrene containing polyphenylene oxide

The high nitrile graft copolymer is provided and a high nitrile resin composition impact modified thereby is also provided. Brittle high nitrile resins can be effectively impact modified by the addition of a high nitrile graft copolymer thereto. The high nitrile graft copolymer contains a rubber substrate and a polymeric graft portion superstrate. The substrate contains high levels of diene and amounts of vinyl cyanide and alkylmethacrylate. The polymeric graft portion (superstate) contains high level of vinyl cyanide and a vinyl aromatic hydrocarbon. The high nitrile resin composition is useful as a resin for making chemical resistant high impact molded articles.

Vinyl cyanide and vinyl aromatic monomers-grafted nitrile rubber

Impact modifier for high nitrile resins and impact modified nitrile

Blends of ABS polymers with different substrate particle sizes are disclosed having a desirable balance of impact resistance, crease stress whitening, and melt viscosity. These compositions are useful in thin guage ABS films.

High impact and low crease stress whitening ABS blends

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Parkersburg, WV, United States of America

Seldon L Dotson