Color stabilized aqueous n-vinyl heterocyclic copolymer solution

Details Color stabilized aqueous n-vinyl heterocyclic copolymer solution Color stabilized aqueous n-vinyl heterocyclic copolymer solution

1995-09-27

1997-02-18

Reddick, Judy M.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524183, 524185, 524379, 524404, 524405, 524443, 524492, C08K 535

Patent

active

056042752

ABSTRACT:
This invention relates to an N-vinyl heterocyclic copolymer in substantially pure deionized water or in aqueous alcoholic solution which exhibits significantly reduced color and odor and which is obtained by contacting an alcohol-copolymer mixture with water and a nitrogen containing, trivalent boron complex compound selected from the group of borane-ammonia, borane-lower alkylamine, tetra-lower alkyl ammonium octahydrotriborate, morpholine-borane, lower alkyl morpholine-borane, silylamino borane and mixtures thereof and stripping alcohol from the resulting mixture under vacuum at between about 100 and about 740 mm Hg below absolute whereby an aqueous, 10-70 wt. % solids solution of the copolymer is obtained having a water white color stability of more than a year.

REFERENCES:
patent: 2872433 (1959-02-01), Glickman
patent: 3415776 (1968-12-01), White
patent: 4567040 (1986-01-01), Varco et al.
patent: 5126395 (1992-06-01), End et al.
patent: 5319041 (1994-06-01), Zhong et al.

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