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    • 12. 发明授权
    • Method for the post-treatment of titanium dioxide pigments
    • 二氧化钛颜料后处理方法
    • US07135065B2
    • 2006-11-14
    • US11179985
    • 2005-07-12
    • Lydia Drews-NicolaiSiegfried Bluemel
    • Lydia Drews-NicolaiSiegfried Bluemel
    • C09C1/36C01G23/047C01G23/08
    • C09C1/3661C01P2002/30C01P2004/84C01P2006/64C08K3/22C08K9/02C09D7/62
    • The invention relates to a method for the post-treatment of titanium dioxide, in order to produce particularly weather-resistant titanium dioxide pigments with good optical properties. The method is characterized in that, together with the hydrous oxides of tin and zirconium, at least one other from the group comprising aluminium, silicon and titanium is additionally precipitated onto the particle surface. The post-treatment components are added to the aqueous TiO2 suspension either in the acidic range (pH value of 3 at most) or in the alkaline range (pH value of 10 at least). The pH value is subsequently set to between 6 and 8. Final tempering of the pigment at elevated temperatures from over 125° C. to up to 500° C. can improve the tone b. The pigment is particularly suitable for use in paints, coatings and plastics.
    • 本发明涉及一种后处理二氧化钛的方法,以便制备具有良好光学性能的特别耐候的二氧化钛颜料。 该方法的特征在于,与锡和锆的水合氧化物一起,还包括从铝,硅和钛组成的组中的至少一种另外沉淀到颗粒表面上。 将后处理组分在酸性范围(pH值为3以下)或碱性范围(至少为p​​H值为10)中添加到TiO 2水溶液中。 pH值随后设定在6和8之间。颜料在高于125℃至高达500℃的高温下进行最终回火可改善色调b。 该颜料特别适用于油漆,涂料和塑料。