Process for producing a low gloss thermoplastic resin

Details Process for producing a low gloss thermoplastic resin Process for producing a low gloss thermoplastic resin

1987-12-21

1989-10-31

Briggs, Sr., Wilbert 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 87, C08F27904

Patent

active

048778443

ABSTRACT:
A process for producing a low gloss thermoplastic resin which comprises polymerizing in two steps from 20 to 70 parts by weight of a butadiene polymer, at least 70% by weight of which is constituted by butadiene, with from 30 to 80 parts by weight of a total of from 15 to 40% by weight of a vinyl cyanide monomer and from 60 to 85% by weight of an aromatic vinyl monomer, characterized in that for the polymerization of the first step, the butadiene polymer, the vinyl cyanide monomer and the aromatic vinyl monomer were charged in amounts corresponding to from 20 to 80% by weight of the entire butadiene polymer, from 20 to 80% by weight of the entire vinyl cyanide monomer and from 20 to 80% by weight of the entire aromatic vinyl monomer, respectively, and after the completion of the polymerization of the first step, the rest of the butadiene polymer, the vinyl cyanide monomer and the aromatic vinyl monomer were charged for the polymerization of the second step.

REFERENCES:
patent: 3442979 (1969-05-01), Ott et al.
patent: 3663656 (1972-05-01), Ford et al.
patent: 4012462 (1977-03-01), Chaudhary
patent: 4221883 (1980-09-01), Mott et al.
patent: 4703090 (1987-10-01), Ferraresi et al.

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