PREPARING AND DISPERSING SURFACE-MODIFIED COLOUR PIGMENTS

摘要

A method of preparing a pigment comprising in order the steps of: a) providing a pigment containing a nucleophile group under basic conditions; b) reacting the pigment with a compound according to Formula (1): wherein X is a halogen atom or a tosylate group; and RI and R2 independently represent an alkyl group; and c) hydrolyzing the RI-O bound and/or the R2-O bound. Pigments obtainable by the method and non aqueous pigment dispersions are also disclosed.