Patent ID: 9228074
Filing Date: 2016-01-05
CPC Classification: B01D,C01P,C08K,C08L,C09C

Claim Text:
1. 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, wherein the weight ratio of the propanolamine to the ammonium polyacrylate or polyacrylic acid is from 3.75:1 to 5.75:1.