Process for preparing impact resistant polyvinyl aromatics

Details Process for preparing impact resistant polyvinyl aromatics Process for preparing impact resistant polyvinyl aromatics

C - Chemistry, Metallurgy

08

F

400/2030

C08F 255/06 (2006.01) C08F 283/12 (2006.01) C08F 291/06 (2006.01)

Patent

CA 1051582

PROCESS FOR PREPARING IMPACT RESISTANT POLYVINYL AROMATICS Abstract of the disclosure The invention relates to novel impact resistant graft co- polymers of a vinyl aromatic on an EPTR especially character- ized by an improved notched impact strengnth and resistancy to atmospheric corrosion, and a process for their preparation. Said copolymers are obtained by a two-step mass suspension polymerization process characterized by the presence of oxygen, preferably by the presence of air, at a pressure of from 0.05 to 10 atmospheres gauge during the course of the mass poly- merization step.

221477

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