| 发明名称 |
Polymer product and the use of the same as dispersing agent |
| 摘要 |
The invention relates to a polymer product obtained by polymerization of;i) at least one monomer selected from N-vinylformamide and vinyl acetate, and;ii) maleic anhydride;to give a copolymer comprising N-vinylformamide and/or vinyl acetate and maleic anhydride followed by hydrolyzing formamide groups originating from N-vinylformamide to amino groups and/or acetate groups originating from vinyl acetate to hydroxyl groups and acid anhydride to dicarboxylic acid groups to give a water-soluble copolymer comprising amine and/or hydroxyl and carboxyl groups, wherein the molar ratio of the N-vinylformamide and/or vinyl acetate monomer to the maleic anhydride monomer is from 70:30 to 30:70. The polymer product can be used as a dispersing agent or as a scale inhibiting agent. |
| 申请公布号 |
US9034977(B2) |
申请公布日期 |
2015.05.19 |
| 申请号 |
US201214123564 |
申请日期 |
2012.06.15 |
| 申请人 |
|
发明人 |
Carceller Rosa;Juppo Ari;Aksela Reijo |
| 分类号 |
C08F220/52;C08F222/06;C08F218/08;C08K3/20;C08F8/12;C08K3/22;C08K3/26 |
主分类号 |
C08F220/52 |
| 代理机构 |
Thomas Horstemeyer, LLP |
代理人 |
Thomas Horstemeyer, LLP |
| 主权项 |
1. A method for preparing a stable dispersion of solids comprising fillers or pigments in an aqueous medium comprising introducing a polymer product as a dispersing agent into the medium, said polymer product being obtained by polymerization of
N-vinylformamide, vinyl acetate, and maleic anhydride to give a copolymer comprising N-vinylformamide, vinyl acetate and maleic anhydride followed by hydrolyzing formamide groups originating from N-vinylformamide to amino groups, acetate groups originating from vinyl acetate to hydroxyl groups and acid anhydride to dicarboxylic acid groups to give a water-soluble copolymer comprising amine, hydroxyl and carboxyl groups, wherein the molar ratio of the N-vinylformamide and vinyl acetate monomer to the maleic anhydride monomer is from 70:30 to 30:70. |
| 地址 |
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