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    • 16. 发明专利
    • Method for producing modified water absorbent resin
    • 生产改性吸水树脂的方法
    • JP2007277466A
    • 2007-10-25
    • JP2006108083
    • 2006-04-10
    • Procter & Gamble Coザ プロクター アンド ギャンブル カンパニーThe Procter & Gamble Company
    • MITSUKAMI YOSHIROMATSUMOTO MAKOTOIWAMURA TAKU
    • C08J3/24
    • PROBLEM TO BE SOLVED: To provide a method for producing a modified water absorbent resin excellent in production efficiency, magnification of absorbancy against pressure, absorbing rate, gel strength, permeability, and the like. SOLUTION: The method for producing a modified water absorbent resin comprises the steps of (a) mixing a water absorbent resin with water, a water-soluble radical polymerization initiator and/or a thermally decomposable radical polymerization initiator without adding any ethylenically unsaturated monomer to obtain an absorbent resin composition and (b) irradiating the water absorbent resin composition obtained by the mixing step with an active energy ray, wherein the surface water content of the water absorbent resin in the water absorbent resin composition is controlled at 3.0% by weight or more with respect to the 100% by weight water absorbent resin at least at a time point in the irradiation step. COPYRIGHT: (C)2008,JPO&INPIT
    • 待解决的问题:提供一种生产效率优异,吸收率对压力,吸收速率,凝胶强度,渗透性等优异的改性吸水性树脂的制造方法。 解决方案:改性吸水性树脂的制备方法包括以下步骤:(a)将吸水树脂与水混合,水溶性自由基聚合引发剂和/或可热分解的自由基聚合引发剂,而不加入任何烯属不饱和的 单体,得到吸收性树脂组合物,(b)将通过混合工序得到的吸水性树脂组合物用活性能量射线照射,其中吸水性树脂组合物中的吸水性树脂的表面含水量控制在3.0% 至少在照射步骤的时间点相对于100重量%的吸水性树脂重量或更多。 版权所有(C)2008,JPO&INPIT