发明名称 |
Powdery absorbing material for aqueous liquids based on water-swellable carboxylate polymers |
摘要 |
The present invention relates to a powdery absorbing material for aqueous liquids based on a water-swellable powdery polymer having at least 0.2 equivalents carboxyl groups per 100 parts by weight which are neutralized by 50 to 99, advantageously by at least 80 mole %. The powdery absorbing material is obtained by treating the water-swellable carboxyl-groups-containing polymer with a solution of an N-(hydroxyalkyl) beta -(meth)-alanine ester or with the polycondensation products thereof. As a solvent for the powdery absorbing material, water is used which either contains water-miscible organic diluents which evaporate on heating, or non-evaporative water-miscible organic diluents, i.e., diluents remaining in the polymer. |
申请公布号 |
US5229466(A) |
申请公布日期 |
1993.07.20 |
申请号 |
US19920884344 |
申请日期 |
1992.05.18 |
申请人 |
CHEMISCHE FABRIK STOCKHAUSEN GMBH |
发明人 |
BREHM, HELMUT;MERTENS, RICHARD |
分类号 |
A61L15/00;A61L15/60;B01J20/26;C08F8/30;C08K5/17;C08L101/00 |
主分类号 |
A61L15/00 |
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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