Process of producing copolymers of an aromatic vinyl monomer and

Details Process of producing copolymers of an aromatic vinyl monomer and Process of producing copolymers of an aromatic vinyl monomer and

1982-07-21

1983-12-13

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526271, C08F22208, C08F 848, C08F22216

Patent

active

044205996

ABSTRACT:
A process of producing a copolymer of aromatic vinyl compound and maleic anhydride by adding half-ester maleate in two or more steps to the aromatic vinyl compound to perform the copolymerization reaction, and dealcoholating the unit of the half-ester maleate in the resulting copolymer to cyclize. The thus obtained aromatic vinyl compound-maleic anhydride copolymer has excellent transparency and thermal resistance.

REFERENCES:
patent: 2798053 (1957-07-01), Brown
patent: 2838475 (1958-06-01), Barrett
patent: 3238168 (1966-03-01), Wolff et al.
patent: 3684776 (1972-08-01), Field et al.
patent: 4048379 (1977-09-01), Jidai et al.
patent: 4229559 (1980-10-01), Cotter et al.
patent: 4243784 (1981-01-01), Akima et al.

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