Importance

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Abstract

A process for preparing an encapsulated pigment dispersion suitable for use in an ink jet printing ink comprising the following steps in the order I) followed by II):

I) providing a dispersion comprising a pigment, a liquid medium and a dispersant comprising the repeat units from copolymerizing the ethylenically unsaturated monomers in components a) to c):a) from 75 to 97 parts of one or more hydrophobic ethylenically unsaturated monomers comprising at least 50 parts benzyl (meth) acrylate;b) from 3 to 25 parts one or more hydrophilic ethylenically unsaturated monomers having one or more ionic group(s);c) from 0 to 2 parts of one or more hydrophilic ethylenically unsaturated monomers having a hydrophilic non-ionic group; and wherein the parts are by weight and the sum of the parts a) to c) add up to 100;II) cross-linking the dispersant in the presence of the pigment and the liquid medium.

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First Claim