发明名称 |
Preparation of finely divided, water-soluble polymers |
摘要 |
Finely divided, water-soluble polymers are prepared by polymerization of water-soluble, monoethylenically unsaturated monomers in not less than 20% strength by weight aqueous solution in the presence of a polymerization initiator in a kneader by a process in which from 0.1 to 10% by weight, based on the total monomers, of a surfactant are used in the polymerization, the polymerization initially being carried out to a conversion of the monomers of not less than 60% in the absence of the surfactant or in the presence of not more than 50% of the amount of surfactant, and the remaining amount of surfactant then being added to the reaction mixture and the polymerization completed. The addition of surfactant causes the polymer gel to disintegrate with formation of fine particles.
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申请公布号 |
US5258473(A) |
申请公布日期 |
1993.11.02 |
申请号 |
US19910663019 |
申请日期 |
1991.03.01 |
申请人 |
BASF AKTIENGESELLSCHAFT |
发明人 |
NIESSNER, MANFRED;WICKEL, STEFAN;SCHNEIDER, WALTER;BECK, JUERGEN;HARTMANN, HEINRICH;MEYER, THOMAS |
分类号 |
C08F2/08;C08F2/10;(IPC1-7):C08F2/08;C08F20/06 |
主分类号 |
C08F2/08 |
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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