Patent ID: 7618489

Claim:
A pigment comprising pigment particles reacted with an epoxy compound at an elevated temperature in the presence of a solvent for dispersing the pigments wherein a discrete powder form of the surface treated pigment particles can be obtained by virtue of drying of the solvent so as to provide a surface treatment of the particle, the epoxy compound having a general formula: wherein R 1 , R 2 , R 3 , R 4 and R 5 are each, independently, hydrogen, or substituted or unsubstituted alkyl, or, R 2 and 4 may be taken together to form a 5-7 membered ring, and R 6 is hydrogen, —OOCR 7 , —OR 8 , —OOC—CR 9 ═CR 10 R 11 , a monoepoxy or polyepoxy group containing diphenyl, phenyl, or substituted or unsubstituted alkyl or cycloalkyl, or a monoepoxy or polyepoxy group containing a polyether group, R 7 , R 8 , R 10 and R 11 are each, independently, hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, or substituted or unsubstituted alkenyl, R 9 is hydrogen, or alkyl, with the proviso that the epoxy compound has no silicon-containing group.