Process for preparing copolymer

Details Process for preparing copolymer Process for preparing copolymer

1985-03-22

1985-12-24

Michl, Paul R.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526232, 526342, C08F 436

Patent

active

045607354

ABSTRACT:
A process for preparing .alpha.-methylstyrene/acrylonitrile copolymer by suspension or bulk polymerization of .alpha.-methylstyrene and acrylonitrile with at least one member selected from the group consisting of styrene, chlorostyrene, para-methylstyrene, t-butylstyrene, acrylic ester and methacrylic ester in the presence of a difunctional organic peroxide having a 10 hour half-life temperature of 60.degree. to 120.degree. C. and capable of producing a t-butyl radical, at a polymerization temperature of 80.degree. to 135.degree. C. The process produces the copolymers having excellent transparency, heat resistance and strength in a high conversion in a short time.

REFERENCES:
patent: 3341507 (1967-09-01), Guillet
patent: 3491071 (1970-01-01), Lanzo
patent: 4049605 (1977-09-01), Kobashi
patent: 4169195 (1979-09-01), Rinehart
patent: 4200593 (1980-04-01), van der Loos
patent: 4340723 (1982-07-01), Duyzings

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