Patent ID: 6544328
Filing Date: 2003-04-08
Classification: C01P,C09C

Abstract:
A process for preparing a pigment which is dispersible in paints and plastics concentrates comprising the steps of:(a) mixing a particulate pigment with water to form a slurry of the pigment and water; (b) mixing a surface active agent with said slurry of step (a) so that said pigment is coated therewith, said surface active agent being selected from the group consisting of ethoxylated sorbitan derivatives having HLB values in the range of from 1 to about 20, a mixture of non-ethoxylated mono and diglycerides and ethoxylated mono and diglycerides having HLB values in the range of from 1 to about 20 and mixtures of said ethoxylated sorbitan derivatives, said non-ethoxylated mono and diglycerides and said ethoxylated mono and diglycerides; and (c) drying said pigment coated in accordance with step (b).