Continuous production of high impact polystyrene
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United States of America Patent
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Oct 11, 1988
Grant Date -
N/A
app pub date -
Jul 25, 1986
filing date -
Jul 25, 1986
priority date (Note) -
Expired
status (Latency Note)
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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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