Removal of vinylpyrrolidone from vinylpyrrolidone polymers

Details Removal of vinylpyrrolidone from vinylpyrrolidone polymers Removal of vinylpyrrolidone from vinylpyrrolidone polymers

1987-08-06

1989-01-03

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, 210690, 210694, C08F 610

Patent

active

047958022

ABSTRACT:
Vinylpyrrolidone is removed from its polymers by a process in which an aqueous or alcoholic solution of the polymer is treated with an adsorbent, the adsorbents used preferably being active carbon, zeolites and especially acidic ion exchangers.

REFERENCES:
patent: 2665271 (1954-01-01), Beller
patent: 2810714 (1957-10-01), Price
patent: 4182851 (1980-01-01), Straub et al.
patent: 4636540 (1987-01-01), Warfel
Chem. Abstr. 96(2): 7529v.

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