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    • 97. 发明授权
    • Kaolin clay pigments, their preparation and use
    • 高岭土颜料,其制备及用途
    • US06564199B1
    • 2003-05-13
    • US09937671
    • 2001-12-20
    • Robert J. PruettJun YuanHarry Vincent Brown, Jr.David O. Cummings
    • Robert J. PruettJun YuanHarry Vincent Brown, Jr.David O. Cummings
    • C04B1404
    • C09C1/42C01P2004/51C01P2004/54C01P2004/61C01P2004/62D21H19/40
    • A paper coating pigment manufactured from kaolin crude containing minor amounts of minerals is used in lightweight coated and ultra-lightweight coated applications. The pigments comprise a phyllosilicate assemblage of minerals that yield a final pigment MgO content ranging between 0.04 to 0.3 weight percent and a K2O content ranging between 0.12 and 0.8 weight percent based on the dry weight of the kaolin crude. The mica in the pigment product is 1.0% to 6.7% by weight, and smectite is 1.2% to 9.1% by weight of the kaolin. The presence of these weight percentages can be identified by a shape factor of 15 or greater. The viscous clay content of the feed to produce the pigment product is between 70 and 100 weight percent based on the dry weight of the kaolin clay. The pigment has a shape factor ranging between 35 and 60 or greater, and greater than 80% by weight of the particle are less than 2 microns, and greater than 12% are less than 0.25 microns.
    • 由含有少量矿物质的高岭土原料制成的纸涂颜料用于轻质涂层和超轻质涂层应用。 颜料包括矿物的页硅酸盐组合物,其基于高岭土原油的干重,产生0.04-0.3重量%的最终颜料MgO含量和范围在0.12至0.8重量%之间的K 2 O含量。 颜料中的云母为1.0〜6.7重量%,绿土为高岭土的1.2〜9.1重量%。 这些重量百分比的存在可以通过15或更大的形状因子来识别。 用于生产颜料产品的进料的粘性粘土含量基于高岭土的干重为70-100重量%。 颜料具有35至60或更大的形状因子,并且大于80重量%的颗粒小于2微米,并且大于12重量%小于0.25微米。
    • 98. 发明授权
    • Preparation and use of high brightness kaolin pigments
    • 高亮度高岭土颜料的制备和使用
    • US06514333B1
    • 2003-02-04
    • US09700027
    • 2000-11-09
    • Jun YuanVince H. BrownRobert J. PruettWilliam L. Garforth
    • Jun YuanVince H. BrownRobert J. PruettWilliam L. Garforth
    • C04B1404
    • C09C1/42C01P2004/51C01P2004/61C01P2004/62C01P2006/12C01P2006/22C01P2006/60D21H19/40
    • A novel clay pigment, the manufacture thereof and the use of the pigment in the coating of lightweight groundwood paper are disclosed. The kaolin clay particles initially have a shape factor between less than 10 and a particle size distribution where between 30 to 60% by weight is less than 2 microns and 20% by weight is less than 0.25 micron e.s.d. This clay is subjected to attrition grinding to produce clay particles having a shape factor between 13 and 18 and then classified to produce a particle size distribution where 80 to 90% by weight are less than 2 microns and 20% by weight are less than 0.25 micron. These pigments have a G.E. brightness ranging from 88 to 92; are deficient in ultra-fine particles; are fluid at a high solids concentration greater than 70%, and have a low shear Brookfield viscosity below 500 cps and a high shear Hercules viscosity of 18 dyne-cm above 200 rpm when using an “A” bob.
    • 公开了一种新型粘土颜料,其制造方法以及颜料在轻质磨木纸涂料中的应用。 高岭土最初具有小于10的形状因子和30至60重量%小于2微米的粒度分布,20重量%小于0.25微米e.s.d。 对该粘土进行磨磨研磨以产生形状因子为13至18的粘土颗粒,然后分级以产生其中80至90重量%小于2微米的颗粒尺寸分布,并且20重量%小于0.25微米 。 这些颜料具有G.E. 亮度从88到92; 缺乏超细颗粒; 是高固体浓度大于70%的流体,并且当使用“A”鲍勃时,具有低于500cps的低剪切布鲁克菲尔德粘度和高于200rpm的18dyne-cm的高剪切赫氏体粘度。