C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
400/2036
C08F 236/12 (2006.01) C08F 279/02 (2006.01)
Patent
CA 1281450
A B S T R A C T A process for producing a low gloss thermo- plastic 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 buta- diene, 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, respec- tively, 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 mono- mer were charged for the polymerization of the second step. The thermoplastic resins obtained by the process of the present invention can be used as molding materi- als in the fields where the impact resistance and high flow properties are required, such as large size thin wall molded products including particularly parts for automobiles.
508728
Kishida Kazuo
Mikami Yoshiyuki
Toyooka Yutaka
Goudreau Gage Dubuc
Mitsubishi Rayon Company Ltd.
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