发明授权
US5393340A Metakaolin pigment with high brightness and low abrasion and manufacture
thereof from soft kaolin clays
失效
高光泽度的高亮度和低磨损的偏高岭土颜料，由软高岭土制成
- 专利标题： Metakaolin pigment with high brightness and low abrasion and manufacture thereof from soft kaolin clays
- 专利标题（中）： 高光泽度的高亮度和低磨损的偏高岭土颜料，由软高岭土制成
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申请号： US150335申请日： 1993-11-09
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公开(公告)号： US5393340A公开(公告)日： 1995-02-28
- 发明人: Richard A. Slepetys , M. Phillip Jameson
- 申请人： Richard A. Slepetys , M. Phillip Jameson
- 申请人地址： NJ Iselin
- 专利权人： Engelhard Corporation
- 当前专利权人： Engelhard Corporation
- 当前专利权人地址： NJ Iselin
- 主分类号： C09C1/42
- IPC分类号： C09C1/42 ; C04B14/10
摘要：
The invention relates to novel metakaolin pigments which are characterized by a unique combination of exceptionally high brightness and exceptionally low abrasion along with the excellent hiding power equal to that achieved by premium conventional calcined kaolin pigments. The invention relates also to a method of producing such metakaolin pigments by subjecting relatively coarse high purity and high crystallinity kaolin booklets to highly intensive media grinding to generate fine kaolin particles of reduced crystallinity, and calcining the ground particles while limiting calcination temperature and time such as to form metakaolin.
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