发明名称 |
Preparation of bead polymers from water-soluble, ethylenically unsaturated monomers |
摘要 |
Polymers in bead form are prepared from water-soluble ethylenically unsaturated monomers by a reverse suspension polymerization of a liquid in the presence of polymerization initiators and protective colloids obtainable by grafting polymers (A) containing (a) aromatic monovinyl monome from 40 to 100% by weight (b) C3-6 monoethylenically unsaturated carboxylic acid and/or maleic anhydride from 0 to 60% by weight (c) other monoethylenically unsaturated monomers from 0-20% by weight, as copolymerized units with the proviso that the sum of the weight (a) to (c) is always 100 and the polymer (A) has a molecular weight (number average) from 500 to 20,000 and a hydrogenation iodine number from 1.3 to 51 with a fixed monomer mixture at given concentration levels.
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申请公布号 |
US4879361(A) |
申请公布日期 |
1989.11.07 |
申请号 |
US19880168825 |
申请日期 |
1988.03.16 |
申请人 |
BASF AKTIENGESELLSCHAFT |
发明人 |
REHMER, GERD;NIESSNER, MANFRED;HEIDE, WILFRIED;HARTMANN, HEINRICH;PETERS, KARL-CLEMENS |
分类号 |
C08F2/00;C08F2/32;C08F257/00 |
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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