Process for production of copolymers of maleic anhydride and an

Details Process for production of copolymers of maleic anhydride and an Process for production of copolymers of maleic anhydride and an

1989-04-19

1991-02-12

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, C08F 212

Patent

active

049925172

ABSTRACT:
What is described herein is a process for making copolymers of maleic anhydride and a C.sub.1 -C.sub.8 alkyl vinyl ether. In this process, a reactor is precharged with a solution of maleic anhydride in a sterically hindered monoether solvent and the alkyl vinyl ether monomer is fed thereto. Copolymerization is effected in the presence of a free radical initiator. A pumpable slurry of the copolymer in the reaction medium is formed upon polymerization, from which a copolymer product which is substantially a benzene-free powder is obtained.

REFERENCES:
patent: 3532771 (1970-10-01), Field et al.
patent: 4200720 (1980-04-01), Evani et al.
patent: 4451630 (1984-05-01), Atkinsoon et al.
patent: 4492776 (1985-01-01), Atkinson et al.
patent: 4522990 (1985-06-01), Andrews

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