Spray-Dried, Hydrous, Kaolin Clay and Methods of Making Same
AssigneeBurgess Pigment Company
InventorsGeorge L. Blossom, III, Lewis A. Berry
Life of this patent
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Abstract
A method of producing a spray-dried, hydrous kaolin clay is disclosed that includes mixing a hydrous kaolin clay with water, an ammonium polyacrylate or polyacrylic acid, ammonium hydroxide, and a propanolamine selected from the group consisting of 2-amino-2-methyl-1-propanol, 2-methylamino-2-methyl-1-propanol, 1-amino-2-propanol, or mixtures thereof, to produce a viscosity stable dispersed slurry, and spray drying the slurry to produce the spray-dried, hydrous, kaolin clay. A spray-dried, hydrous kaolin clay is also disclosed.
Claims20
A method of producing a spray-dried, hydrous, kaolin clay, comprising:
- mixing a hydrous kaolin clay with water, an ammonium polyacrylate or polyacrylic acid, ammonium hydroxide, and a propanolamine selected from the group consisting of 2-amino-2-methyl-1-propanol, 2-methylamino-2-methyl-1-propanol, 1-amino-2-propanol, or mixtures thereof, to produce a viscosity stable dispersed slurry;
- and
- spray drying the slurry to produce the spray-dried, hydrous, kaolin clay.
A spray-dried, hydrous kaolin clay, comprising a propanolamine selected from the group consisting of 2-amino-2-methyl-1-propanol, 2-methylamino-2-methyl-1-propanol, 1-amino-2-propanol, or mixtures thereof, and an ammonium polyacrylate or polyacrylic acid, wherein the amount of ammonium polyacrylate or polyacrylic acid is less than 18 pounds per ton of dry clay.
Dependencies are inferred from the claim text.