Patent ID: 6156117
Filing Date: 2000-12-05
Classification: C01P,C09C,D21H

Abstract:
A method of preparing a polymer structured pigment slurry comprising the steps of:providing an anionic, aqueous slurry, said slurry including a plurality of kaolin clay particles having a Malvern median particle size of about 0.3 to about 3.5 microns, and wherein the slurry includes at least about 50% kaolin clay particles by weight;admixing a low molecular weight, polycationic polymer having a molecular weight less than 50,000 to said slurry in an amount of less than about 0.20% by weight, the Malvern median particle size of said kaolin clay particles increasing in an amount of less than about 20% after the step of admixing said polycationic polymer to said slurry.