| 发明名称 |
LOW MOLECULAR WEIGHT PHOSPHORUS-CONTAINING POLYACRYLIC ACIDS AND USE THEREOF AS SCALE INHIBITORS IN WATER-CARRYING SYSTEMS |
| 摘要 |
The invention relates to an aqueous solution of acrylic acid polymers, obtainable by polymerization of acrylic acid in feed mode with peroxodisulfate as initiator in the presence of hypophosphite in water as solvent, wherein
(i) water and optionally one or more ethylenically unsaturated comonomers are initially charged, and(ii) acrylic acid in acidic, unneutralized form, optionally one or more ethylenically unsaturated comonomers, aqueous peroxodisulfate solution and aqueous hypophosphite solution are added continuously, and(iii) a base is added on completion of the acrylic acid feed to the aqueous solution, wherein the comonomer content does not exceed 30% by weight, based on total monomer content. |
| 申请公布号 |
US2015027956(A1) |
申请公布日期 |
2015.01.29 |
| 申请号 |
US201414513237 |
申请日期 |
2014.10.14 |
| 申请人 |
BASF SE |
发明人 |
DETERING Juergen;URTEL Bolette;NIED Stephan;HEINTZ Ewald |
| 分类号 |
C02F5/14 |
主分类号 |
C02F5/14 |
| 代理机构 |
|
代理人 |
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| 主权项 |
1. A process for producing an aqueous solution of an acrylic acid polymer by polymerization of acrylic acid in feed mode with peroxodisulfate as initiator in the presence of hypophosphite in water as solvent, wherein:
(i) water and optionally one or more ethylenically unsaturated comonomers are initially charged, and (ii) acrylic acid in acidic, unneutralized form, optionally one or more ethylenically unsaturated comonomers, aqueous peroxodisulfate solution and aqueous hypophosphite solution are added continuously, and (iii) a base is added on completion of the acrylic acid feed to the aqueous solution, wherein the comonomer content does not exceed 30% by weight, based on total monomer content. |
| 地址 |
Ludwigshafen DE |
