Process for preparing ABS polyblends

Details Process for preparing ABS polyblends Process for preparing ABS polyblends

1979-11-19

1981-07-07

Hamrock, William F.

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

Synthetic resins

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

525 87, 525 98, 525 99, 525314, 525316, C08L 900, C08L14700, C08L 4700

Patent

active

042775744

ABSTRACT:
The present invention relates to a process for preparing ABS polyblends having an alkenyl aromaticalkenyl nitrile monomer matrix polymeric phase reinforced with rubber particles grafted with said monomers and having a bimodal rubber particle size distribution, the process comprising: charging continuously a formulation of said monomers having a soluble diene dissolved therein and a first grafted diene rubber particle dispersed therein to a back-mixed reaction zone operating at 50-80% steady state, flow-through, conversion of said monomer formulation, continuously mass polymerizing said charged monomer formulation to 50-80% conversion, forming and dispersing said soluble rubber as second grafted diene particles having a particle size larger than said first grafted rubber particles, continuously withdrawing an effluent from said reaction zone and separating said ABS polyblend from said effluent.

REFERENCES:
patent: 3511895 (1970-05-01), Kydonieus et al.
patent: 3591537 (1971-07-01), Squire et al.
patent: 3642947 (1972-02-01), Stein
patent: 3931356 (1976-01-01), Dalton
patent: 3950455 (1976-04-01), Okamoto et al.

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