Process for producing styrenic/alkenylnitrile copolymers

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Removing and recycling removed material from an ongoing...

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526342, C08F21210

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active

045501491

ABSTRACT:
Disclosed is a process for the continuous mass polymerization of styrenic and alkenylnitrile monomers. The process comprises the steps of continuously introducing a feed comprising a predetermined ratio of styrenic and alkenylnitrile monomers into a reaction vessel to produce a reaction mixture; subjecting the reaction mixture to conditions of temperature and pressure under which said monomers copolymerize to produce a styrenic/alkenylnitrile copolymer; subjecting the reaction mixture to sufficient agitation; continuously withdrawing styrenic/alkenylnitrile copolymer from the reaction vessel; and devolatilizing the styrenic/alkenylnitrile withdrawn from the reaction vessel by a two-stage procedure including first adjusting the ratio of styrenic to alkenylnitrile monomer therein followed by heating to volatilize the volatile components and then separation of volatile components.

REFERENCES:
patent: 2739142 (1956-03-01), Jones et al.
patent: 2941985 (1960-06-01), Amos et al.
patent: 3738972 (1973-06-01), Moriyama et al.
patent: 3813369 (1974-05-01), Latinen

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