PROCESS, PIGMENT AND INK

摘要

A process for preparing an encapsulated carbon black pigment comprising cross-linking a dispersant with a cross-linking agent in the presence of a carbon black pigment and a liquid medium, thereby encapsulating the carbon black pigment within the cross-linked dispersant, wherein: a) the dispersant has one or more cross-linkable groups selected from amine, hydroxy and carboxylic acid groups or salts thereof; b) the cross-linking agent is polyglycerol polyglycidyl ether; c) the carbon black pigment has an average primary particle size of from 16 to 22nm and a surface area of from 140 to 220m2/g.