Process for the preparation of a homogeneous thermoplastic polym

Details Process for the preparation of a homogeneous thermoplastic polym Process for the preparation of a homogeneous thermoplastic polym

1988-05-27

1990-05-01

Schofer, Joseph L.

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

Synthetic resins

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

525243, 525285, 526 65, 526 88, 526272, 526918, 422135, C08F 202, C08F 206

Patent

active

049219065

ABSTRACT:
The invention relates to a process for the preparation of a thermoplastic polymer on the basis of an alkenyl aromatic monomer, an unsaturated dicarboxylic anhydride, and, optionally, a rubber, characterized in that the monomers and/or solution thereof are/is reacted in at least two reaction zones that are in open connection with each other at the top and at the bottom, the reaction mixture being circulated through the reaction zones by means of a mixing device and/or a conveying device.
Using the process, a homogeneous product of constant composition is obtained.

REFERENCES:
patent: 2443817 (1948-06-01), Draeger et al.
patent: 3354136 (1967-11-01), Crawford
patent: 3438952 (1969-04-01), Christensen
patent: 3458484 (1969-07-01), Zimmerman et al.
patent: 3476522 (1969-11-01), Stovall
patent: 3681308 (1972-08-01), Irvin et al.
patent: 4328327 (1982-05-01), Tanaka et al.
patent: 4442273 (1984-04-01), Neiditch et al.
Partial Translation of Netherlands Pat. Appl'n No. 158393 (p. 1, lines 1-40).

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