发明名称 |
(Meth) acrylic acid (salt) polymer and its production process |
摘要 |
There is provided: a (meth)acrylic acid (salt) polymer which has high properties and is little colored; and a process which can produce this polymer with a high polymerization conversion without causing the corrosion of the reaction vessel. When a (meth)acrylic acid (salt) polymer is obtained by carrying out polymerization of an unsaturated monocarboxylic monomer (a) and an unsaturated polyalkylene glycolic monomer (b) with a polymerization initiator, either a redox polymerization initiator including hydrogen peroxide and a reducing agent is used as the polymerization initiator in a specific amount, or the unsaturated polyalkylene glycolic monomer is subjected to the polymerization in the form of an esterification reaction product as obtained by a process including the steps of: esterifying the unsaturated monocarboxylic monomer and a polyalkylene glycol in a specific charging ratio in the presence of an acid catalyst in a manner for a portion of the residual unsaturated monocarboxylic monomer as a starting raw material to remain; and then neutralizing the acid catalyst and the residual unsaturated monocarboxylic monomer (a) with a basic substance after the esterification; and the polymerization is carried out under conditions where the pH during the polymerization is in the range of 3.2 to 7.0.
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申请公布号 |
US2003149206(A1) |
申请公布日期 |
2003.08.07 |
申请号 |
US20020281971 |
申请日期 |
2002.10.29 |
申请人 |
TOMITA TAKASHI;YUASA TSUTOMU;KAWAKAMI HIROKATSU |
发明人 |
TOMITA TAKASHI;YUASA TSUTOMU;KAWAKAMI HIROKATSU |
分类号 |
C04B24/26;C08F2/00;C08F4/40;C08F220/04;C08F220/28;C08F290/06;(IPC1-7):C08F4/06;C08F4/28 |
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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