Fine platy kaolin composition
    1.
    发明授权
    Fine platy kaolin composition 有权
    精细高岭土组成

    公开(公告)号:US07806978B2

    公开(公告)日:2010-10-05

    申请号:US10531257

    申请日:2003-12-15

    IPC分类号: C04B14/04 C01F5/24

    摘要: The present invention relates to a kaolin composition having improved physical properties, for example, for use in the production of paper products. The composition can comprise kaolin having a shape factor of at least about 20. The kaolin can have a particle size distribution such that at least about 94% by weight of the kaolin can have an esd of less than about 2 μm and/or at least about 80% by weight of the kaolin can have an esd of less than 1 μm. The amount of the kaolin having an esd of less than about 0.25 μm can range from about 25% to about 60% by weight. The Hercules viscosity of the kaolin product is less than 4000 rpm at 18 dynes at 63% solids and less than 1500 rpm at 18 dynes at 69% solids when measured using the “A” bob. The present invention also relates to an improved method for making the kaolin product from sedimentary kaolin.

    摘要翻译: 本发明涉及具有改善的物理性能的高岭土组合物,例如用于生产纸制品。 组合物可以包含至少约20的形状因子的高岭土。高岭土可以具有使得至少约94重量%的高岭土具有小于约2μm的esd和/或至少 约80重量%的高岭土可以具有小于1μm的esd。 esd小于约0.25μm的高岭土的量可以为约25重量%至约60重量%。 高岭土产品的Hercules粘度在18达因数时为63%固体,小于1500转/分钟,18达因时为69%固体,当使用“A”鲍伯测量时。 本发明还涉及一种由沉淀高岭土制备高岭土产品的改进方法。