发明授权
- 专利标题: Water-absorbent agent, method for production thereof, and water-absorbent composition
- 专利标题(中): 吸水剂,其制造方法和吸水性组合物
-
申请号: US10229111申请日: 2002-08-28
-
公开(公告)号: US06992144B2公开(公告)日: 2006-01-31
- 发明人: Yorimichi Dairoku , Kinya Nagasuna , Yoshihiko Masuda , Nobuyuki Harada , Yoshihiro Motono , Kunihiko Ishizaki
- 申请人: Yorimichi Dairoku , Kinya Nagasuna , Yoshihiko Masuda , Nobuyuki Harada , Yoshihiro Motono , Kunihiko Ishizaki
- 申请人地址: JP Osaka
- 专利权人: Nippon Shokubai Co., Ltd.
- 当前专利权人: Nippon Shokubai Co., Ltd.
- 当前专利权人地址: JP Osaka
- 代理机构: Buchanan Ingersoll PC
- 优先权: JP6-20295 19940217; JP6-50365 19940322
- 主分类号: C08F8/32
- IPC分类号: C08F8/32
摘要:
A method for the production of a water-absorbent agent comprises mixing an absorbent resin containing a carboxyl group with an additive soluble in the aqueous solution of at least one member selected from the group consisting of inorganic acids, organic acids, and polyamino acids and a cross-linking agent capable of reacting with the carboxyl group. A water-absorbent agent obtained by adding from 0.005 to 8 parts by weight of an epoxy compound to 100 parts by weight of a water-absorbent resin, exhibiting an absorption capacity without load of at least 45 (g/g), an absorption capacity under load of 20 g/cm2 of not less than 30 (ml/g) and having a residue amount of an epoxy compound of not more than 2 ppm. A water-absorbent composition comprises a polyamino acid (salt) and a water-absorbent resin containing a carboxyl group.