Polymer modification system for vinylaromatic monomer production

Details Polymer modification system for vinylaromatic monomer production Polymer modification system for vinylaromatic monomer production

1981-03-27

1984-06-05

Henderson, C. A.

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

Synthetic resins

Treating polymer containing material or treating a solid...

134 2219, 134 30, 528496, 528497, 528500, 585441, C08F 600, B08B 300

Patent

active

044529759

ABSTRACT:
Disclosed is a process for modifying accumulated cross-linked polymer in an apparatus used for the production of a vinylaromatic compound, comprising optionally softening the polymer with an organic solvent; precipitating the polymer with a light, polar non-solvent for the polymer and expanding the softened polymer by bringing the softened polymer in contact with steam whereby the polymer is converted into a state which enables it to be more easily removed from the apparatus.

REFERENCES:
patent: 2749313 (1956-06-01), Williams
patent: 2801234 (1957-07-01), Hanson
patent: 3004014 (1961-10-01), Myerholtz, Jr.
patent: 3255166 (1966-06-01), Bernhardt
patent: 3558576 (1971-01-01), Weller
patent: 3657162 (1972-04-01), Finestone
patent: 3705190 (1972-12-01), Bockstahler
patent: 3764384 (1973-10-01), Berni

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