Patent ID: 6881779
Filing Date: 2005-04-19
Classification: B01F,C08L,C09B,C09D

Abstract:
1. A method of dispersing a pigment, comprising the steps of: (a) adding a pigment to mixture comprising a pigment disperant comprising an acrylic backbone having a plurality of pendant anionic groups and a stabilizing substituent, the stablizing substituent comprising an alkoxy-terminated polyalkylene oxide of the formula wherein D is a divalent radical that is —O— or —NR 3 —, R 3 is hydrogen or an alkyl group of from one to twelve carbons, R 1 is hydrogen or an alkyl group of from one to eight carbons, R 2 is an alkyl group of from one to thirty carbons, and n is an integer from one to one thousand, water, and cosolvent, (b) mixing the pigment and the mixture to form a premix, and (b) grinding the premix to produce a dispersion in which the maximum particle size of the pigment is less than six microns.