Mass polymerization process for ABS polyblends

Details Mass polymerization process for ABS polyblends Mass polymerization process for ABS polyblends

1982-02-12

1983-11-22

Michl, Paul R.

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

Synthetic resins

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

C08F27904

Patent

active

044170300

ABSTRACT:
The invention relates to a process for preparing ABS polymers by continuous mass polymerization wherein an alkenyl aromatic monomer having a diene rubber dissolved therein is charged continuously to a reactor simultaneously with a separate feed-stream of an alkenyl nitrile monomer. The reactor is stirred to maintain, in the reaction mixture contained therein, a substantially uniform composition and operates at a steady state polymer solids level above that at which phase inversion occurs and up to about 70% polymer solids such that the diene rubber added is dispersed as rubber particles having a particle size of about 0.1 to 10 microns. A partially polymerized reaction mixture is continuously removed from the reactor and an ABS polymer is recovered therefrom.

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patent: 4252912 (1981-02-01), Tokas
patent: 4254236 (1981-03-01), Burk
patent: 4277574 (1981-07-01), Jastrzebski

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