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US 7,611,575 B2Granted
High solids, large particle, calcined kaolin slurries
AssigneeImerys Pigments, Inc.
InventorsEdward J. Sare, Tommy L. Adkins, Stephen C. Raper
Life of this patent
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AssigneeImerys Pigments, Inc.
InventorsEdward J. Sare, Tommy L. Adkins, Stephen C. Raper
Estimating the term…
The present invention relates to coarse calcined kaolin slurries having a high solids content. The invention also relates to methods 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 μm. 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 related to coarse calcined kaolin slurries having a multimodal particle size distribution and a high solids content.
A composition comprising a slurry comprising calcined kaolin, wherein at least about 40% by weight of the calcined kaolin has a particle size of at least about 1 μm, at least about 40% by weight of the calcined kaolin has a particle size of at least about 2 μm, the slurry has a solids content of at least about 58% by weight, relative to the total weight of the slurry, and the calcined kaolin has not been subjected to mechanical grinding.
A method of preparing a slurry comprising:
A method of preparing a slurry having a solids content of at least about 58% by weight, relative to the weight of the slurry, said method comprising:
A paint comprising a slurry comprising calcined kaolin, wherein at least about 40% by weight of the calcined kaolin has a particle size of at least about 1 μm, at least about 40% by weight of the calcined kaolin has a particle size of at least about 2 μm, the slurry has a solids content of at least about 58% by weight, relative to the total weight of the slurry, and the calcined kaolin has not been subjected to mechanical grinding.
A method of making a coated paper or coated paper board comprising:
Dependencies are inferred from the claim text.