Mass polymerization process for ABS polyblends

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

1979-10-17

1981-02-24

Seccuro, Carman 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 53, 525316, C08F27904, C08L 5502

Patent

active

042529115

ABSTRACT:
The process relates to a continuous mass polymerization process for ABS polyblends wherein a monomer formulation of monoalkenyl aromatic and alkenyl nitrile monomers having a conjugated diene rubber dissolved therein is continuously charged to a first, stirred reaction zone operating at a steady conversion of said monomers of about 5 to 45% forming a partially polymerized first mixture having said rubber dispersed as grafted rubber particles, followed by continuously polymerizing said first mixture in a second stirred reaction zone by substantial linear flow polymerization under evaporative cooling of said monomers to a second partially polymerized mixture containing about 50 to 90% of ABS polyblend solids and separating said solids from said second mixture as an ABS polyblend.

REFERENCES:
patent: 3903202 (1975-09-01), Carter et al.
patent: 3945976 (1976-03-01), McCurdy et al.
patent: 3981944 (1976-09-01), Okamoto et al.
patent: 4034020 (1977-07-01), Moore et al.

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