公开(公告)号：US06514333B1

公开(公告)日：2003-02-04

申请号：US09700027

申请日：2000-11-09

申请人： Jun Yuan ,  Vince H. Brown ,  Robert J. Pruett ,  William L. Garforth

发明人： Jun Yuan ,  Vince H. Brown ,  Robert J. Pruett ,  William L. Garforth

IPC分类号： C04B1404

CPC分类号： C09C1/42 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/12 ,  C01P2006/22 ,  C01P2006/60 ,  D21H19/40

摘要： 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.

摘要翻译： 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。