Abstract: The present invention relates to a composition comprising calcined kaolin having a narrow particle size distribution. The composition can have many uses, such as fillers or extenders in paint, plastics, polymers, papermaking, and coating compositions. More generally, the inventive products may be used wherever calcined kaolins are used.

Abstract: The present invention relates to coarse calcined kaolin slurries having a high solids content. The invention also relates to method of making such slurries. The resulting slurries can have a solids content of at least about 58% by weight wherein at least about 40% by weight of the calcined kaolin particles has a particle size of at least about 1 arm. The slurries can be stabilized where the solids show little settling from suspension. The slurries have many uses, including fillers or extenders in paint and coating compositions for paper or paper board. More generally, the inventive products may be used wherever calcined kaolins are used. The present invention also relates to coarse calcined kaolin slurries having a multimodal particle size distribution and a high solids content.

Abstract: The present invention relates to calcined kaolin having an unusually narrow particle size distribution. The calcined kaolin can have a particle size distribution wherein: (I). The calcined kaolin may be prepared from a hydrous kaolin having a particle size distribution, wherein: (II). The calcined kaolin can be used in many applications, such as paint and coating compositions for paper or paper board, and more generally, the inventive products may be used wherever calcined kaolins are used. ( particle ? ? ? size ? ? ? at ? ? ? a ? ? ? cumulative ? ? ? mass ? ? ? of < 80 ? % ) ( particle ? ? ? size ? ? ? at ? ? ? a ? ? ? cumulative ? ? ? mass ? ? ? of < 20 ? % ) ? 3 ( I ) ( particle ? ? ? size ? ? ? at ? ? ? a ? ? ? cumulative ? ? ? mass ? ? ? of < 80 ? % ) ( particle ? ? ? size ? ? ? at ? ? ? a ? ? ? cumulative ? ? ? mass ? ? ? of < 40 ? % ) ? 3.