Continuous production of high impact polystyrene

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

C - Chemistry, Metallurgy

08

F

402/571

C08F 279/02 (2006.01)

Patent

CA 1288890

ABSTRACT The invention relates to a continuous flow process for producing polystyrene having discrete particles of rubber in- cluded 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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