Process for providing homogeneous copolymers of vinylpyrrolidone

Details Process for providing homogeneous copolymers of vinylpyrrolidone Process for providing homogeneous copolymers of vinylpyrrolidone

1993-12-07

1995-03-07

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526330, 526227, C08F22610, C08F21808, C08F 434

Patent

active

053959043

ABSTRACT:
A process for making homogeneous copolymers of vinylpyrrolidone (VP) and vinyl acetate (VA) which form clear aqueous solutions and have high cloud points. The process involves precharging VP and VA monomers in a predetermined ratio, and then feeding VP and VA at a predetermined rate, the ratio of the components in the initial charge and the feeding rates for the monomer being selected in accordance with the reactivity rates of the monomers towards copolymerization as opposed to homopolymerization.

REFERENCES:
patent: 4520179 (1985-05-01), Barabas et al.
patent: 5122582 (1992-06-01), Potthoff-Karl et al.

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