Continuous production of high impact polystyrene

Details Continuous production of high impact polystyrene Continuous production of high impact polystyrene

1986-07-25

1988-10-11

Briggs, Sr., Wilbert J.

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

Synthetic resins

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

525 51, 525316, C08F27902

Patent

active

047772107

ABSTRACT:
The invention relates to a continuous flow process for producing polystyrene having discrete particles of rubber included therein. The process utilizes a pre-inversion reactor, in which a solution of styrene, polystyrene and rubber are mixed prior to being introduced into a second stirred tank reactor. The viscosity of the solutions in the pre-inversion reactor and in the second stirred tank reactor are closely controlled to produce desirable HIPS products.

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PCT Application No. 80/00325, filed Mar. 26, 1980, Inventors: Bubeck et al., "Factors Influencing Rubber Phase Morphology in Polystyrene", by H. Keskkula; May 1979.
"Diene Rubber for Impact Modification of Plastics"; Product Information from Firestone.

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