Preparation of polyvinylpyrrolidone

Details Preparation of polyvinylpyrrolidone Preparation of polyvinylpyrrolidone

1988-01-19

1988-11-22

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526264, C08F 2044

Patent

active

047866993

ABSTRACT:
Polyvinylpyrrolidone having a Fikentscher K value of from 14 to 95 is prepared at from 50.degree. to 95.degree. C. in aqueous solution with hydrogen peroxide as starter, the solution being maintained at pH 7-11 by means of NaOH, KOH, their carbonates or bicarbonates.

REFERENCES:
patent: 2634259 (1953-04-01), Ney, Jr. et al.
patent: 3129210 (1964-04-01), Grosser et al.

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