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    • 36. 发明授权
    • Preparation of rapidly dissolving/absorbing powders of hydrophilic/super
absorbent (CO)polymers
    • 亲水/超吸收(CO)聚合物快速溶解/吸收粉末的制备
    • US5994419A
    • 1999-11-30
    • US970608
    • 1997-11-14
    • Christian ColletteManuel HidalgoJean-Marc CorpartAndre KowalikPaul Mallo
    • Christian ColletteManuel HidalgoJean-Marc CorpartAndre KowalikPaul Mallo
    • C08F2/00C08F2/18C08F2/32C08F20/06C08F20/56C08J9/28
    • C08F2/32
    • Rapidly dissolving/absorbing free-flowing powders of hydrophilic/superabsorbent (co)polymers, having irregular nonspherical morphology and a particle size distribution ranging from 100 .mu.m to 800 .mu.m, are prepared by (a) phase inversion (co)polymerizing stirred admixture of (i) a hydrocarbonic solution of at least one surfactant having an HBL ranging from 8 to 12 and (ii) an aqueous solution of at least one hydrophilic unsaturated monomer, in the presence of an effective amount of a radical polymerization initiator and at a predetermined temperature of (co)polymerization, (b) next introducing into the medium of (co)polymerization, after (co)polymerization of the at least one hydrophilic unsaturated monomer, a second aqueous solution of at least one hydrophilic unsaturated monomer, (c) then (co)polymerizing the second aqueous solution, and (d) thence extracting the hydrocarbonic phase and water from the resulting (co)polymerizate and drying same, with the proviso (e) that the second aqueous monomer solution is introduced at a temperature of about the predetermined temperature of (co)polymerization and the volumetric ratio of aqueous phase to hydrocarbonic phase ranges from 0.6 to 1.2.
    • 通过(a)相转化(共)聚合搅拌的混合物制备具有不规则非球形形态和100μm至800μm的粒度分布的亲水/超吸收(共)聚合物的快速溶解/吸收的自由流动粉末 (i)至少一种具有8-12的HBL的表面活性剂的烃溶液,和(ii)至少一种亲水性不饱和单体的水溶液,在有效量的自由基聚合引发剂存在下,和 (共)聚合的预定温度,(b)在至少一种亲水性不饱和单体(第二种)亲水性不饱和单体的第二水溶液(c)聚合后,再次引入(共)聚合的介质中 然后(共)聚合第二水溶液,和(d)从所得(共)聚合物中提取烃相和水并干燥,条件是(e)第二个 在约(共)聚合的预定温度和水相与烃相的体积比范围为0.6至1.2的温度下引入高分子单体溶液。