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    • 7. 发明授权
    • Water-soluble copolymers, their preparation and their use
    • 水溶性共聚物,其制备及其用途
    • US4952655A
    • 1990-08-28
    • US183611
    • 1988-04-19
    • Hans-Peter Seelmann-EggebertDieter BoeckhHeinrich HartmannWolfgang TrieseltAlexander Kud
    • Hans-Peter Seelmann-EggebertDieter BoeckhHeinrich HartmannWolfgang TrieseltAlexander Kud
    • A01N25/26C08F2/10C08F20/10C08F220/04C08F220/20C08F290/00C08F299/00C08L101/16
    • C08F220/04A01N25/26
    • Water-soluble copolymers having a K value of from 15 to 120 (determined on the sodium salt according to H. Fikentscher in aqueous solution at 25.degree. C., a pH of 7 and a polymer concentration of the Na salt of 1% by weight) contain, in the polymerized form,(a) from 99.5 to 80 mol % of one or more monoethylenically unsaturated C.sub.3 -C.sub.6 -monocarboxylic acids and(b) from 0.5 to 20 mol % of one or more comonomers which possess two or more ethylenically unsaturated, non-conjugated double bonds, are derived from esters and are obtainable by esterification of(b1) monoethylenically unsaturated C.sub.3 -C.sub.6 -monocarboxylic acids with(b2) polyhydric alcohols of 2 to 6 carbon atoms, polyalkylene glycols, polyglycerols, polyvinyl alcohol and monohydric, monoethylenically unsaturated C.sub.3 -C.sub.6 -alcohols and(c) from 0 to 30 mol % of other water-soluble, monoethylenically unsaturated monomers which are copolymerizable with (a) and (b),the copolymers containing polymer segments which consist of units of the monomers (a) and (c), have a weight average molecular weight of not more than 15,000 and are bonded to one another via units of (b).
    • K值为15〜120的水溶性共聚物(根据H.Fikentscher的钠盐在25℃的水溶液中测定,pH为7,Na盐的聚合物浓度为1重量% )包含(a)99.5-80mol%的一种或多种单烯属不饱和C 3 -C 6 - 单羧酸和(b)0.5至20摩尔%的一种或多种具有两个或多个烯键式的共聚单体的共聚单体 不饱和的非共轭双键衍生自酯,可通过(b1)单烯属不饱和C3-C6-单羧酸与(b2)2至6个碳原子的多元醇酯,聚亚烷基二醇,聚甘油,聚乙烯醇和 一元,单烯属不饱和C 3 -C 6醇和(c)0至30摩尔%可与(a)和(b)共聚的其它水溶性单烯属不饱和单体,所述共聚物含有聚合物链段, monom (a)和(c)的重均分子量不大于15,000,通过(b)单元彼此结合。