Heat-resistant copolymer of alpha-methylstyrene and acrylonitril

Details Heat-resistant copolymer of alpha-methylstyrene and acrylonitril Heat-resistant copolymer of alpha-methylstyrene and acrylonitril

1985-04-18

1987-04-21

Briggs, Sr., Wilbert J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 78, 526 79, 526 80, 525 70, 525 75, 525242, C08F 200

Patent

active

046597905

ABSTRACT:
A heat-resistant copolymer obtained by copolymerizing (A) 72-82 parts by weight of .alpha.-methylstyrene and (B) 26-18 parts by weight of acrylonitrile, characterized in that the copolymer contains (a) 0-15% by weight of monomer chain --(A)--(A)--(A)--, (b) 50% by weight or more of monomer chain --(A)--(A)--(B)--, and (c) 50% by weight or less of monomer chain--(B)--(A)--(B)--, the total of (a), (b) and (c) being 100% by weight. This copolymer is excellent in heat stability and moldability when molded at high temperatures, and the blending of this copolymer with other thermoplastic resins gives thermoplastic resins with excellent heat resistance.

REFERENCES:
patent: 4361684 (1982-11-01), Minematsu et al.
patent: 4526928 (1985-07-01), Mathumoto et al.

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