发明公开
EP2669318A1 MANUFACTURING METHOD FOR POLYACRYLIC ACID (SALT) -BASED WATER-ABSORBENT RESIN POWDER
有权
基本信息:
- 专利标题： MANUFACTURING METHOD FOR POLYACRYLIC ACID (SALT) -BASED WATER-ABSORBENT RESIN POWDER
- 专利标题（中）：聚丙烯酸（盐）基吸水树脂粉的制造方法
- 申请号：EP12738970.8 申请日：2012-01-30
- 公开(公告)号：EP2669318A1 公开(公告)日：2013-12-04
- 发明人： NOGI, Kozo , NAKAMURA, Masatoshi , SHIBATA, Koji , HONDA, Koji , WATANABE, Yusuke , MATSUMOTO, Satoshi , NAKATSURU, Reiko , ISHIZAKI, Kunihiko , KIMURA, Kazuki , MACHIDA, Sayaka
- 申请人： Nippon Shokubai Co., Ltd.
- 申请人地址： 1-1, Koraibashi 4-chome, Chuo-ku Osaka-shi, Osaka 541-0043 JP
- 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： 1-1, Koraibashi 4-chome, Chuo-ku Osaka-shi, Osaka 541-0043 JP
- 代理机构： Copsey, Timothy Graham
- 优先权： JP2011017185 20110128; JP2012015776 20120127
- 国际公布： WO2012102407 20120802
- 主分类号： C08J3/24
- IPC分类号： C08J3/24 ; C08F20/06 ; C08J3/12 ; C08L33/02
摘要：
From a view point of reduction in an out of spec product after surface crosslinking, particularly, when an alkylene carbonate compound is used as a surface crosslinking agent, influence by an air temperature is great, and it is necessary to reduce ethylene glycol which is produced as a byproduct, and there is provided a process for producing a polyacrylic acid (salt)-based water absorbent resin powder, comprising
a step of polymerizing an aqueous acrylic acid (salt)-based monomer solution,
a step of drying the resulting polymer,
an optional grinding·classifying step, and
a surface crosslinking step,
wherein in the surface crosslinking step,
(1) a surface crosslinking agent containing an alkylene carbonate compound and a polyhydric alcohol compound is mixed into a water absorbent resin powder, the mixture is heat-reacted and, further, simultaneously with, or separately from the mixing, an ion reactive surface crosslinking agent is mixed, and/or
(2) mixing treatment of mixing a surface crosslinking agent solution into a water absorbent resin powder containing at least one or more kinds of ion reactive surface crosslinking agents is performed two or more times.
摘要（中）：
a step of polymerizing an aqueous acrylic acid (salt)-based monomer solution,
a step of drying the resulting polymer,
an optional grinding·classifying step, and
a surface crosslinking step,
wherein in the surface crosslinking step,
(1) a surface crosslinking agent containing an alkylene carbonate compound and a polyhydric alcohol compound is mixed into a water absorbent resin powder, the mixture is heat-reacted and, further, simultaneously with, or separately from the mixing, an ion reactive surface crosslinking agent is mixed, and/or
(2) mixing treatment of mixing a surface crosslinking agent solution into a water absorbent resin powder containing at least one or more kinds of ion reactive surface crosslinking agents is performed two or more times.
从表面交联后的规格以外的产品减少的观点考虑，特别是使用碳酸亚烷基酯化合物作为表面交联剂时，空气温度的影响大，需要减少生成的乙二醇 作为副产物，提供了一种生产聚丙烯酸（盐）基吸水树脂粉末的方法，该方法包括聚合丙烯酸（盐）水基单体水溶液的步骤，干燥所得聚合物的步骤， 任选的研磨分级步骤和表面交联步骤，其中在表面交联步骤中，（1）将包含亚烷基碳酸酯化合物和多元醇化合物的表面交联剂混入吸水树脂粉末中，混合物加热 与混合物同时或分开混合离子反应性表面交联剂，和/或（2）混合表面的混合处理 交联剂溶液加入含有至少一种或多种离子反应性表面交联剂的吸水树脂粉末中两次或多次。
IPC结构图谱:
| C | 化学；冶金 |
| --C08 | 有机高分子化合物；其制备或化学加工；以其为基料的组合物 |
| ----C08J | 加工；配料的一般工艺过程；不包括在C08B，C08C，C08F，C08G或C08H小类中的后处理 |
| ------C08J3/00 | 高分子物质的处理或配料的工艺过程 |
| --------C08J3/24 | .高分子的交联，如硫化 |