Reactor system for the production of high impact polystyrene

Details Reactor system for the production of high impact polystyrene Reactor system for the production of high impact polystyrene

2006-03-20

2009-02-10

Teskin, Fred M (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S243000, C525S316000, C422S134000

Reexamination Certificate

active

07488774

ABSTRACT:
A continuous process for producing high impact polystyrene comprising feeding at least one vinyl aromatic monomer, an elastomer, and a free radical initiator to a first linear flow reactor to form a reaction mixture, polymerizing the reaction mixture in said linear flow reactor to at least the phase inversion point of the mixture, and feeding the reaction mixture from the first linear flow reactor to a second reactor for post-inversion polymerization of the mixture. A method of producing an elastomer-reinforced polymer comprising inverting a reaction mixture comprising at least one vinyl aromatic monomer, an elastomer, and a free radical initiator in a plug flow reactor. A high impact polystyrene reactor system, comprising a linear flow reactor having an inlet and an outlet, and a continuously stirred tank reactor having an inlet in fluid communication with the linear flow reactor outlet and receiving an effluent from the linear flow reactor.

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Patent application entitled “Reactor Apparatus Having Reduced Back Mixing,” filed May 4, 2005, as U.S. Appl. No. 11/121,795.
Provisional patent application entitled “Horizontal Boiling Plug Flow Reactor and Reactor System for the Production of High Impact Polystyrene,” filed Dec. 21, 2005, as U.S. Appl. No. 60/752,766.
Patent application entitled “Horizontal Boiling Plug Flow Reactor,” filed Mar. 20, 2006, as U.S. Appl. No. 11/384,596.
“ATOFINA HIPS (high impact polystyrene),” Amco Plastic Materials, Inc., http://www.amco.ws/plastics/atofina/hips.asp, Jul. 7, 2005, pp. 1-2.

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