发明名称 |
Highly water-absorptive polymer and process for producing the same |
摘要 |
A process for producing a highly water-absorptive polymer, which comprises suspending an aqueous solution containing a water-soluble polymerizable monomer and an optional crosslinking agent into droplets in a hydrophobic organic solvent in the presence of a dispersant and a water-soluble radical polymerization initiator, and allowing the water-soluble polymerizable monomer to polymerize in the droplets, wherein the dispersant is a phosphoric ester surface active agent represented by the following general formula [I]: wherein R1 represents an alkyl or alkylaryl group having 8 to 30 carbon atoms, R2 represents OH group or a group of the formula -(CH2CH2O)m-OR1, and m and n are an integer of 1 to 30, and the aqueous solution is successively fed to the hydrophobic organic solvent so that the droplets of different polymerization degrees can be present in the solvent.
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申请公布号 |
US5998553(A) |
申请公布日期 |
1999.12.07 |
申请号 |
US19980064167 |
申请日期 |
1998.04.22 |
申请人 |
MITSUBISHI CHEMICAL CORPORATION |
发明人 |
IIDA, SEIICHIRO;ITO, KIICHI;KATO, SUEICHI |
分类号 |
C08F2/00;C08F2/32;(IPC1-7):C08F2/00 |
主分类号 |
C08F2/00 |
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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