High molecular weight copolymers of maleic anhydride and methyl

Details High molecular weight copolymers of maleic anhydride and methyl High molecular weight copolymers of maleic anhydride and methyl

1989-07-14

1991-09-10

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C08F 3402

Patent

active

050474901

ABSTRACT:
A process of manufacturing powdered copolymers of maleic anhydride with methyl vinyl ether in a mole ratio of 1:1 and a specific viscosity in a range from 2 to 5 by copolymerization of maleic anhydride with methyl vinyl ether in the presence of radical initiators to initiate polymerization. The process includes mixing maleic anhydride with an excess of about 3 to about 20 mol methyl vinyl ether per mol maleic anhydride and initiating a polymerization reaction with a radical initiator added in a quantity of from about 0.001 to about 1 weight % with respect to the maleic anhydride. The polymerization reaction takes place in the absence of other solvents.

REFERENCES:
patent: 2782182 (1957-02-01), Verburg
patent: 3532771 (1970-10-01), Field et al.
patent: 3553183 (1971-01-01), Field et al.
patent: 3632561 (1972-01-01), Gibb
patent: 4370454 (1983-01-01), Messmer et al.

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