Process for providing homogeneous copolymers of vinylpyrrolidone

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

1996-07-23

1997-11-04

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526307, C08F22610, C08F22660

Patent

active

056841051

ABSTRACT:
A process for making homogeneous copolymers of vinylpyrrolidone (VP) and 3-dimethylaminopropyl methacrylamide (DMAPMA) which form clear aqueous solutions having high cloud points. The process involves precharging VP and DMAPMA monomers in a predetermined ratio, and then feeding VP and DMAPMA 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: 4923694 (1990-05-01), Shih et al.
patent: 5523369 (1996-06-01), Lui et al.
Fred W. Billmeyer, Jr. Textbook of Polymer Science, 3rd. ed., John Wiley & Sons, 1984, pp. 112-114.

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