发明名称 |
ACRYLIC ACID COMPOSITION AND ITS PRODUCTION PROCESS, AND PROCESS FOR PRODUCING WATER-ABSORBENT RESIN USING THIS ACRYLIC ACID COMPOSITION, AND WATER-ABSORBENT RESIN |
摘要 |
In order to produce inexpensively with high productivity a water-absorbent resin of which: the residual monomer content and the water-extractable content are both low, and the properties are high, and the colorability is low; there is provided a process for producing a water-absorbent resin, which is a process for producing a crosslinked water-absorbent resin by polymerizing a monomer component including acrylic acid and/or its salt in a major proportion wherein the acrylic acid is a product obtained by catalytic gas phase oxidation of propylene and/or propane, with the process being characterized by comprising the steps of: preparing the monomer component from an acrylic acid composition that includes the unneutralized acrylic acid and a methoxyphenol and has a methoxyphenol content of 10 to 160 ppm by weight (based on the unneutralized acrylic acid); and then carrying out radical and/or ultraviolet polymerization of the resultant monomer component. |
申请公布号 |
EP1456259(A1) |
申请公布日期 |
2004.09.15 |
申请号 |
EP20020805022 |
申请日期 |
2002.12.17 |
申请人 |
NIPPON SHOKUBAI CO., LTD. |
发明人 |
NAKAHARA, SEI;ISHIZAKI, KUNIHIKO;FUJIMARU, HIROTAMA;NAKASHIMA, YASUHISA;SAKAMOTO, KAZUHIKO |
分类号 |
A61L15/60;C08F20/06;(IPC1-7):C08F20/06;A61L15/00 |
主分类号 |
A61L15/60 |
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