申请人:Kao Corporation
公开号:EP0695762A1
公开(公告)日:1996-02-07
This invention provides a method of manufacturing polymer particles of indeterminate form, characterized in that a cationic surface active agent or an amphoteric surface active agent is present as a dispersant when a water-soluble polymerizable monomer is polymerized by using an inert hydrophobic organic solvent and an aqueous solution of the water-soluble polymerizable monomer. According to the manufacturing method of the present invention, polymer particles of indeterminate form useful as a water absorbing resin having a low apparent specific gravity, a high water absorption degree including a high initial water absorption rate, a high gas-permeability, a high liquid-permeability and a high post-water-absorption gel strength, and, especially, as a water absorbing resin for the production of an absorption body for a sanitary material contacting a human body, such as a sanitary napkin, a paper diaper, shorts for adults, a tampon and sanitary cotton can be obtained by a simple operation with a high productivity and on a mass-production basis.
本发明提供了一种制造不定型聚合物颗粒的方法,其特征在于,在使用惰性疏水性有机溶剂和水溶性可聚合单体的水溶液聚合水溶性可聚合单体时,存在阳离子表面活性剂或两性表面活性剂作为分散剂。根据本发明的制造方法,可用作吸水树脂的不定形聚合物颗粒具有低表观比重、高吸水性(包括高初始吸水率)、高气体渗透性、高液体渗透性和高吸水后凝胶强度、特别是作为一种吸水树脂,用于生产与人体接触的卫生材料的吸收体,如卫生巾、纸尿布、成人短裤、卫生棉条和卫生棉,可以通过简单的操作获得,生产率高,可大批量生产。