发明名称 |
POLYACRYLIC ACID (SALT) WATER-ABSORBENT RESIN, PRODUCTION PROCESS THEREOF, AND ACRYLIC ACID USED IN POLYMERIZATION FOR PRODUCTION OF WATER-ABSORBENT RESIN |
摘要 |
<p>The present invention allows for the production, with a high productivity, of a water-absorbent resin having an improved relationship between absorption capacity and water-soluble polymer, which are conflicting properties of the water-absorbent resin, being easily controlled for polymerization reaction, being of no odor, being less colored, and being of high absorption properties (high absorption capacity under load and high PPUP). In a process for producing a water-absorbent resin by polymerizing an acrylic acid composition including acrylic acid and/or its salt, the process includes: (a) the step of carrying out radical polymerization of the acrylic acid composition to form a hydrogel crosslinked polymer; and (b) the step of drying the hydrogel crosslinked polymer by application of heat, the acrylic acid composition having an unpolymerizable organic compound content of 1 to 1000 ppm by weight, wherein the unpolymerizable organic compound has a solubility parameter of (1.0 to 2.5) x10<SUP>4</SUP> (Jm-<SUP>3</SUP>)<SUP>1/2.</SUP></p> |
申请公布号 |
WO2006109845(A1) |
申请公布日期 |
2006.10.19 |
申请号 |
WO2006JP307796 |
申请日期 |
2006.04.06 |
申请人 |
NIPPON SHOKUBAI CO., LTD.;FUJIMARU, HIROTAMA;ISHIZAKI, KUNIHIKO;NAKAHARA, SEI |
发明人 |
FUJIMARU, HIROTAMA;ISHIZAKI, KUNIHIKO;NAKAHARA, SEI |
分类号 |
C08F20/06;C08F6/00;C08F8/00 |
主分类号 |
C08F20/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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