发明名称 |
PROCESS FOR THE PRODUCTION OF (METH)ACRYLIC POLYMERS |
摘要 |
<p>Disclosed in the present invention is a process for preparing a (meth) acrylic acid-based polymer having a stable quality and suitable as a dispersant for cement. That is, the present invention provides a process for preparing a (meth) acrylic acid-based polymer, comprising the steps of the stage 1 of introducing (meth) acrylic acid and a polyalkylene glycol monoalkyl ether at a molar ratio in the range of 3:1 to 50:1, subjecting them to an esterification reaction in the presence of an acid catalyst and a polymerization inhibitor and deactivating the acid catalyst with an alkaline agent in order to obtain an esterification product containing a (meth) acrylate and (meth) acrylic acid residues and the stage 2 of copolymerizing the (meth) acrylate and the (meth) acrylic acid residues at a pH value in the range of 1.5 to 3.5.</p> |
申请公布号 |
EP1209178(A1) |
申请公布日期 |
2002.05.29 |
申请号 |
EP19990938587 |
申请日期 |
1999.08.23 |
申请人 |
KAO CORPORATION |
发明人 |
SHIBATA, KENGO;MINOU, HARUYA;SATO, HARUYUKI;UKENA, TOSHINAO;KONO, YOSHINAO |
分类号 |
C04B24/26;C04B24/32;C08F2/00;C08F220/04;C08F220/28;C08F265/04;C08F283/06;C08F290/06;C08G65/332;(IPC1-7):C08F290/06 |
主分类号 |
C04B24/26 |
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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