发明公开
- 专利标题： DISPERSION COMPRISING CERIUM OXIDE AND COLLOIDAL SILICON DIOXIDE
- 专利标题（中）： 分散液中的氧化铈和胶态二氧化硅
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申请号： EP07822403.7申请日： 2007-11-09
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公开(公告)号： EP2121860A1公开(公告)日： 2009-11-25
- 发明人: KRÖLL, Michael , HEBERER, Stefan , DAUTH, Katharina
- 申请人： Evonik Degussa GmbH
- 申请人地址： Rellinghauser Strasse 1-11 45128 Essen DE
- 专利权人： Evonik Degussa GmbH
- 当前专利权人： Evonik Degussa GmbH
- 当前专利权人地址： Rellinghauser Strasse 1-11 45128 Essen DE
- 优先权： DE102007008232 20070220
- 国际公布： WO2008101553 20080828
- 主分类号： C09G1/02
- IPC分类号： C09G1/02 ; C09K3/14
摘要：
A dispersion comprising cerium oxide particles and colloidal silicon dioxide particles, where - the zeta potential of the silicon dioxide particles is negative and that of the cerium oxide particles is positive or equal to zero, and the zeta potential of the dispersion is negative overall, and - the mean particle diameter of the cerium oxide particles is not more than 200 nm and that of the silicon dioxide particles is not more than 100 nm, the mean particle diameter of the cerium oxide particles being greater than that of the silicon dioxide particles - the cerium oxide/silicon dioxide weight ratio is from 1.1:1 to 100:1 and - the pH of the dispersion is from 7.5 to 10.5.
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