Process for producing styrenic/alkenylnitrile copolymers

Details Process for producing styrenic/alkenylnitrile copolymers Process for producing styrenic/alkenylnitrile copolymers

1985-07-16

1987-06-30

Michl, Paul R.

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

Synthetic resins

Removing and recycling removed material from an ongoing...

C08F21210

Patent

active

046771719

ABSTRACT:
Disclosed is a process and apparatus 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 agitation; continuously withdrawing styrenic/alkenylnitrile copolymer from the reaction vessel; and by withdrawing vapour phase from the reaction vessel in a controlled amount by varying the amount of cooled surface available for condensing the vapors, condensing the vapors by contact with the cooled surface and returning the condensate to the reaction vessel. The process and apparatus also include a novel means for devolatilizing the product copolymer.

REFERENCES:
patent: 2769804 (1956-11-01), Hanson
patent: 3772257 (1973-11-01), Bochum et al.
patent: 3813369 (1974-05-01), Latinen
patent: 3859268 (1975-01-01), Novack et al.
patent: 4243781 (1981-01-01), Kent
patent: 4551510 (1985-11-01), Morris et al.
Leonard, Vinyl and Diene Monomers, High Polymers, vol. XXIV, Part 2, (1971), p. 525, published by John Wiley & Sons, Inc.

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