公开(公告)号：US20190225545A1

公开(公告)日：2019-07-25

申请号：US16254217

申请日：2019-01-22

Applicant: BASF Corporation

Inventor： Ismail Yildirim ,  Ashok Khokhani ,  Danny Williams ,  Bryan Mudd

IPC: C04B33/04 ,  C04B33/02 ,  C04B33/13 ,  C04B33/32 ,  C04B35/622

Abstract: Calcined kaolin comprising a narrow particle size distribution and a fluxing agent are disclosed herein. In some examples, the calcined kaolin comprises particles, wherein 90% by weight or less of the particles have a diameter of less than 10 microns; 80% by weight or less of the particles have a diameter of less than 5 microns; 40% by weight or less of the particles have a diameter of less than 2 microns; and 20% by weight or less of the particles have a diameter of less than 1 micron. The calcined kaolin exhibits improved brightness, whiteness, particle size distribution, mullite index, and +325 mesh residue level compared to conventional calcined kaolin. Methods of making and using the calcined kaolin particles are also provided herein.