Invention Grant
- Patent Title: Fine platy kaolin composition
- Patent Title (中): 精细高岭土组成
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Application No.: US10531257Application Date: 2003-12-15
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Publication No.: US07806978B2Publication Date: 2010-10-05
- Inventor: Robert J. Pruett , Jun Yuan , Bomi M. Bilimoria , Roger W. Wygant , Anthony V. Lyons
- Applicant: Robert J. Pruett , Jun Yuan , Bomi M. Bilimoria , Roger W. Wygant , Anthony V. Lyons
- Applicant Address: US GA Roswell
- Assignee: Imerys Pigments, Inc.
- Current Assignee: Imerys Pigments, Inc.
- Current Assignee Address: US GA Roswell
- Agency: Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P.
- International Application: PCT/US03/39883 WO 20031215
- International Announcement: WO2004/061014 WO 20040722
- Main IPC: C04B14/04
- IPC: C04B14/04 ; C01F5/24

Abstract:
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.
Public/Granted literature
- US20060124033A1 Fine platy kaolin composition Public/Granted day:2006-06-15
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