发明名称 |
Fine platy kaolin composition |
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.
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申请公布号 |
US7806978(B2) |
申请公布日期 |
2010.10.05 |
申请号 |
US20050531257 |
申请日期 |
2005.11.18 |
申请人 |
IMERYS PIGMENTS, INC. |
发明人 |
PRUETT ROBERT J.;YUAN JUN;BILIMORIA BOMI M.;WYGANT ROGER W.;LYONS ANTHONY V. |
分类号 |
C04B14/04;C01F5/24;D21H19/40 |
主分类号 |
C04B14/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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