Process for producing a heat-resistant copolymer

Details Process for producing a heat-resistant copolymer Process for producing a heat-resistant copolymer

1996-01-03

1995-10-17

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526201, C08F21802

Patent

active

054592151

ABSTRACT:
A process for producing a heat-resistant copolymer which comprises the emulsion polymerization of 50 to 75 parts by weight of .alpha.-methylstyrene, 5 parts by weight or less of styrene, 10 to 30 parts by weight of vinyl cyanide compound, 0.1 to 10 parts by weight of ethylenically unsaturated amide, and 10 parts by weight or less of acrylic alkyl ester or methacrylic alkyl ester, in the presense of 1.0 to 30 parts of a seed latex which comprises 50 to 80 parts by weight of .alpha.-methylstyrene, 5 parts by weight or less of styrene, 15 to 30 parts by weight of vinyl cyanide compound, 10 parts by weight or less of ethylenically unsaturated amide and 10 parts by weight or less of acrylic alkyl ester or methacrylic ester.

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patent: 5200441 (1993-04-01), Kim et al.
patent: 5204406 (1993-04-01), Fujii et al.
CA 113:116508 Rainer et al corresponding DE 3834549 Apr. 1990.

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