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    Method for preparing a pearlescent pigment by coating metal oxides on the synthesized mica
    7.
    发明授权
    Method for preparing a pearlescent pigment by coating metal oxides on the synthesized mica 有权
    通过在合成云母上涂覆金属氧化物来制备珠光颜料的方法

    公开(公告)号：US06899757B2

    公开(公告)日：2005-05-31

    申请号：US10398814

    申请日：2000-12-05

    申请人： Kil-Wan Chang ,  Kwang-su Lim

    发明人： Kil-Wan Chang ,  Kwang-su Lim

    IPC分类号： C09C1/40 ,  C09C1/00 ,  C09C1/36 ,  C09C3/06 ,  C09C3/08 ,  C04B14/20

    CPC分类号： C09C1/0021 ,  C01P2004/61 ,  C09C1/0015 ,  C09C2200/102 ,  C09C2220/106

    摘要： Disclosed is a method for preparing a pearlescent pigment by coating metal oxides on the synthesized mica, involving the steps of grinding the synthesized mica by agitating the mica with water in a water mixer to a particle size between 100 and 500 μm and separating the mica, dispersing the separated particles of the synthesized mica in water and adding acid thereto to adjust pH between 1 and 4, adding the metal oxide precursors and a basic aqueous solution thereto while maintaining said pH range until the desired color is attained, and thereby forming at least one hydrous metal oxide layer on the particles of the synthesized mica, and filtering, water-washing, drying and calcining the synthesized mica coated with the metal oxide layer. The method may further involve the step of further pulverizing the synthesized mica roughly ground in a water mixer by using a conventional wet pulverizer so that less than 100 μm of the synthesized mica may be used as a base material. The suitable surfactants can be used in a water mixer as well as a conventional wet pulverizer. The pearlescent pigment prepared according to the present invention has excellent luster and chroma, since a coating layer of metal oxides is smooth and the dispersibility of the particles is excellent.

    摘要翻译： 公开了一种通过在合成云母上涂覆金属氧化物来制备珠光颜料的方法，包括通过在水混合器中用水搅拌云母来研磨合成云母的步骤以粒度在100-500μm之间，并分离云母， 将合成的云母的分离颗粒分散在水中并加入酸以调节pH在1和4之间，在保持所述pH范围直到获得所需颜色的同时加入金属氧化物前体和碱性水溶液，从而形成至少 在合成云母的颗粒上的一个含水金属氧化物层，并且对涂覆有金属氧化物层的合成云母进行过滤，水洗，干燥和煅烧。 该方法可以进一步包括通过使用常规的湿式粉碎机在水混合器中进一步粉碎合成云母的步骤，使得可以使用小于100μm的合成云母作为基材。 合适的表面活性剂可以用于水混合器以及常规的湿式粉碎机中。 根据本发明制备的珠光颜料具有优异的光泽和色度，因为金属氧化物的涂层是光滑的并且颗粒的分散性优异。