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    • 40. 发明申请
    • Water Absorbent Resin Production Method, Water Absorbent Resin, and Usage Thereof
    • 吸水树脂生产方法,吸水树脂及其用途
    • US20100093917A1
    • 2010-04-15
    • US12530957
    • 2008-03-14
    • Kazushi ToriiTaishi Kobayashi
    • Kazushi ToriiTaishi Kobayashi
    • C08J3/24C08L33/00
    • C08J3/245B01J20/267C08F20/06C08J2333/02C08L33/02C08L71/02C08L2666/22
    • A method for producing a water absorbent resin comprises the steps of: (i) polymerizing a monomer including an unsaturated monomer containing a carboxyl group, in the presence of an internal cross-linking agent (A) having two or more radical polymerizable unsaturated groups in its single molecule and in the presence of a non-polymeric internal cross-linking agent (B) having in its single molecule two or more functional groups each of which allows formation of an ester bond or an amide bond by reacting with a carboxyl group, while crushing a cross-linked polymer hydrogel; and (ii) drying the cross-linked polymer hydrogel obtained in the step (i), wherein: an amount of the internal cross-linking agent (A) is 0.01 mol % or more and 0.2 mol % or less relative to an amount of the unsaturated monomer containing a carboxyl group, and a molar ratio (B)/(A) of the internal cross-linking agent (A) and the non-polymeric internal cross-linking agent (B) is 0.01 or more and 1.8 or less.
    • 一种吸水性树脂的制造方法,其特征在于:(i)在含有两个以上自由基聚合性不饱和基团的内部交联剂(A)的存在下,使含有羧基的不饱和单体的单体聚合, 其单分子和在其单分子中具有两个或更多个官能团的非聚合内部交联剂(B)的存在下,每个可通过与羧基反应形成酯键或酰胺键, 同时粉碎交联聚合物水凝胶; 和(ii)干燥步骤(i)中获得的交联聚合物水凝胶,其中:内部交联剂(A)的量相对于(i)的量为0.01摩尔%以上且0.2摩尔%以下 含有羧基的不饱和单体和内部交联剂(A)与非聚合内部交联剂(B)的摩尔比(B)/(A)为0.01以上1.8以下 。