CPC C08F 279/02 (2013.01) | 13 Claims |
1. A process for producing high impact polystyrene comprising:
introducing to a first reactor a partially-polymerized mixture comprising at least one vinyl aromatic monomer, an elastomer and reacted vinyl aromatic monomer wherein the partially-polymerized mixture has not undergone phase inversion;
polymerizing the partially-polymerized mixture in the first reactor to the phase inversion point to form a phase-inverted mixture;
recovering a portion of the phase-inverted mixture from the first reactor wherein the phase-inverted mixture comprises high impact polystyrene; and
introducing another portion of the phase-inverted mixture to another reactor wherein the another portion of the phase-inverted mixture comprises from about 1 volume percent (vol. %) to about 20 vol. % based on the total volume of the first reactor.
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