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    • 16. 发明授权
    • Silica sol and method for producing the same
    • 二氧化硅溶胶及其制造方法
    • US08053479B2
    • 2011-11-08
    • US11993206
    • 2007-07-25
    • Norio MasudaShinsuke Ota
    • Norio MasudaShinsuke Ota
    • C01B33/141B01F3/12
    • C01B33/148C01B33/1485C09K3/1463
    • This invention provides a high-purity, high-concentrated silica sol with long-term stability and low viscosity by preventing viscosity-increase after production, and method for producing the same. In one embodiment, the silica sol produced by an alkoxide method comprises at least a dispersing agent and silica, wherein the concentration of said dispersing agent is 10-3000 ppm with respect to the silica, wherein said dispersing agent may be an inorganic acid, inorganic acid salt, organic acid or organic acid salt whose degradation temperature and boiling point are both 60° C. or higher, wherein said silica sol has a silica concentration of 20% weight or higher.
    • 本发明通过防止生产后的粘度增加而提供具有长期稳定性和低粘度的高纯度,高浓度二氧化硅溶胶及其制备方法。 在一个实施方案中,通过醇盐法制备的硅溶胶包含至少一种分散剂和二氧化硅,其中所述分散剂的浓度相对于二氧化硅为10-3000ppm,其中所述分散剂可以是无机酸,无机酸 酸性盐,降解温度和沸点都为60℃以上的有机酸或有机酸盐,其中所述二氧化硅溶胶的二氧化硅浓度为20重量%以上。