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1. (WO2017148537) METALLIC PIGMENT PARTICLES

Pub. No.:    WO/2017/148537    International Application No.:    PCT/EP2016/054698
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Sat Mar 05 00:59:59 CET 2016
IPC: C09D 11/52
H05K 1/09
Applicants: HP INDIGO B.V.
Inventors: KAGAN, Olga
GRINWALD, Yaron
NUCHIMOV, Rada
ZABAR, Shiran
NEGREANU, Eyal
NESHER, Guy
Title: METALLIC PIGMENT PARTICLES
Abstract:
A method for producing a conductive liquid electrophotographic ink composition is described, the method comprising: heating a polymer resin in a carrier fluid to dissolve the polymer resin; adding conductive metallic pigment particles to be coated to the carrier fluid; cooling the carrier fluid to effect precipitation of the polymer resin from the carrier fluid such that a coating of the resin is at least partially formed on the conductive metallic pigment particles; reheating the suspension of partially coated conductive metallic pigment particles in the carrier fluid; and cooling the carrier fluid at a controlled rate to effect precipitation of the polymer resin from the carrier fluid such that a coating of the resin is formed on the conductive metallic pigment particles, thereby producing the conductive liquid electrophotographic ink composition.