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    • 5. 发明授权
    • Color stabilized aqueous n-vinyl heterocyclic copolymer solutions
    • 颜色稳定的N-乙烯基杂环共聚物水溶液
    • US5604275A
    • 1997-02-18
    • US534753
    • 1995-09-27
    • Yuanzhen ZhongPhilip F. Wolf
    • Yuanzhen ZhongPhilip F. Wolf
    • C08F226/06C08K5/00C08K5/35
    • C08F226/06C08K5/0091
    • 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.
    • 本发明涉及基本上纯的去离子水或含水醇溶液中的N-乙烯基杂环共聚物,其表现出显着降低的颜色和气味,并且是通过使醇共聚物混合物与水和含氮的三价硼配位化合物接触而获得的 从硼烷 - 氨,硼烷 - 低级烷基胺,四氢低级烷基铵八氢五氟硼酸盐,吗啉 - 硼烷,低级烷基吗啉 - 硼烷,甲硅烷基氨基硼烷及其混合物组合,并在真空下从约100至约 低于绝对值740毫米汞柱,由此得到10-70重量% 得到具有大于一年的水白色稳定性的共聚物的固体%固体溶液。