Preparation of copolymers of ethylenically unsaturated dicarboxy

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...

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526216, C08F22204

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active

049525581

ABSTRACT:
Copolymers of ethylenically unsaturated dicarboxylic anhydrides and alkyl vinyl ethers are prepared by copolymerization of the monomers from which the copolymers are derived, in the presence or absence of up to 2% by weight, based on the monomers, of a crosslinking agent containing two or more ethylenically unsaturated double bonds, in the presence of a polymerization initiator in an ester of not less than 5 carbon atoms which is obtained from a saturated aliphatic carboxylic acid and a saturated monohydric alcohol, as a solvent for the monomers, by a precipitation polymerization method.

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