Process for purifying styrene/vinylpyridine copolymer using supe

Details Process for purifying styrene/vinylpyridine copolymer using supe Process for purifying styrene/vinylpyridine copolymer using supe

1989-07-28

1990-02-20

Schofer, Joseph L.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528490, 528503, 526265, C08F 600

Patent

active

049027808

ABSTRACT:
A basic copolymer of styrene with vinylpyridine is purified by extraction with supercritical carbon dioxide to remove residual monomers.

REFERENCES:
patent: 4695621 (1987-09-01), Allada
patent: 4703105 (1987-10-01), Allada
patent: 4725667 (1988-02-01), Kleintjens
Encyclopedia of Chem. Tech., J. Wiley and Sons, Inc., 803 (1968).
Translation of German Offen. No. 3,323,940 to Braun et al., laid open, Jan. 1, 1985.

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