Method for surface treatment of titanium dioxide pigment
    21.
    发明授权
    Method for surface treatment of titanium dioxide pigment 有权
    二氧化钛颜料表面处理方法

    公开(公告)号:US09028913B2

    公开(公告)日:2015-05-12

    申请号:US11906259

    申请日:2007-10-01

    Abstract: A method of preparing coated titanium dioxide particles is provided. The method can include forming an aqueous suspension of titanium dioxide particles having a pH of from about 5.0 to about 7.0; adding a zirconium oxide-forming solution to the suspension in an amount sufficient to decrease the pH of the suspension to about 4.0 or lower; forming a zirconium oxide coating on the titanium dioxide particles to form a suspension of coated particles; adding an aluminum oxide-forming solution to the suspension of coated particles in an amount sufficient to increase the pH of the suspension to about 9.0 or higher; and forming an aluminum oxide coating on the coated particles to form a product.

    Abstract translation: 提供了制备包覆的二氧化钛颗粒的方法。 该方法可以包括形成pH为约5.0至约7.0的二氧化钛颗粒的水性悬浮液; 以足以将悬浮液的pH降低至约4.0或更低的量向悬浮液中加入氧化锆形成溶液; 在二氧化钛颗粒上形成氧化锆涂层以形成涂覆颗粒的悬浮液; 将氧化铝形成溶液以足以将悬浮液的pH增加至约9.0或更高的量的涂覆颗粒的悬浮液; 并在涂覆的颗粒上形成氧化铝涂层以形成产品。

    TREATED INORGANIC PIGMENTS HAVING IMPROVED BULK FLOW
    26.
    发明申请
    TREATED INORGANIC PIGMENTS HAVING IMPROVED BULK FLOW 审中-公开
    具有改进的大流量的处理无机颜料

    公开(公告)号:US20140041549A1

    公开(公告)日:2014-02-13

    申请号:US14112954

    申请日:2012-04-24

    Abstract: The disclosure provides a treated inorganic pigment, typically a titanium dioxide pigment, comprising an inorganic pigment having a surface area of about 30 to about 75 m2/g; wherein the pigment surface is treated with an organic treating agent comprising a polyalkanol alkane or a polyalkanol amine, present in the amount of at least about 1.5%, based on the total weight of the treated pigment; wherein the treated inorganic pigment has a RHI (rat hole index) of about 7 to about 11. The treated inorganic pigments have better flow characteristics, and generally fewer lumps.

    Abstract translation: 本公开提供了经处理的无机颜料,通常为二氧化钛颜料,其包含表面积为约30至约75m 2 / g的无机颜料; 其中所述颜料表面用包含聚链烷烃烷烃或聚链烷醇胺的有机处理剂以基于处理的颜料的总重量计至少约1.5%的量处理; 其中经处理的无机颜料具有约7至约11的RHI(大鼠孔指数)。经处理的无机颜料具有更好的流动特性,并且通常较少的团块。

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