| 发明名称 | Method for improving rheological properties of an aqueous pigment slurry and a dispersion agent | ||
| 摘要 | The invention relates to a method for improving rheological properties of an aqueous pigment slurry. In the method dispersion agent is added to an aqueous phase of a slurry comprising pigment particles or to the aqueous phase into which the pigment particles are to be added. The dispersion agent comprises styrene acrylate copolymer. The invention relates also to dispersion agent for a pigment slurry comprising a first component comprising styrene acrylate copolymer and a second component comprising a conventional dispersion agent, such as a straight-chain polyacrylate. | ||
| 申请公布号 | US9145504(B2) | 申请公布日期 | 2015.09.29 |
| 申请号 | US201414296927 | 申请日期 | 2014.06.05 |
| 申请人 | KEMIRA OYJ | 发明人 | Aarni Esko;Heiska Perttu;Huhtala Kimmo |
| 分类号 | C09D7/02;C09D17/00;D21H19/58;C08K3/26 | 主分类号 | C09D7/02 |
| 代理机构 | Thomas Horstemeyer, LLP | 代理人 | Thomas Horstemeyer, LLP |
| 主权项 | 1. A method for preparing an aqueous pigment slurry with improved rheological properties, where the pigment is selected from calcium carbonate, kaolin, calcinated kaolin, talc, titanium dioxide, gypsum, chalk, satine white, barium sulfate, sodium aluminum silicate, aluminum hydroxide or any of their mixture, the method comprising adding a dispersion agent in amount of 0.1-3.5 parts per 100 parts of pigment to an aqueous phase of a slurry comprising pigment particles or to the aqueous phase into which the pigment particles are to be added, the dispersion agent comprising styrene acrylate copolymer which is obtained by polymerizing styrene and acrylate monomers in presence of starch and which has a mean particle size in the aqueous dispersion in the range of 20-150 nm. | ||
| 地址 | Helsinki FI | ||