Process for preparing copolymers of alpha-methylstyrene and acry

Details Process for preparing copolymers of alpha-methylstyrene and acry Process for preparing copolymers of alpha-methylstyrene and acry

1989-07-19

1990-11-20

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 87, 526201, 526342, 525 86, 525242, 525243, C08F 222, C08F21212

Patent

active

049720325

ABSTRACT:
Copolymers of .alpha.-methylstyrene and acrylonitrile having improved composition of uniformity are prepared by emulsion polymerizing a first monomer stream having a weight ratio of .alpha.-methylstyrene/acrylonitrile from about 75/25 to about 85/15 and thereafter polymerizing a second monomer feed stream comprising acrylonitrile.

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patent: 4526928 (1985-07-01), Mathumoto et al.

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