Patent ID: 6287741
Filing Date: 2001-09-11
Classification: G03G

Abstract:
A liquid toner composition for use in electrostatic printing processes operating within the viscosity range of from 100 to 10,000 mPa.s, the liquid toner comprising:(a) a non-aqueous carrier liquid, the carrier liquid being an electricaly non-conductive liquid selected from the group consisting of a silicon fluid of straight chained configuration, a silicone fluid of cyclic configuration, a silicone fluid of branched configuration, and a combination thereof having a viscosity in the range of from 0.5 to 1,000 mPa.s;(b) an insoluble marking particle, and(c) a dispersion additive, the dispersion additive comprising a polysiloxane having at least one functional group comprising a radical which introduces an active site into the poly-siloxane and wherein the functional group is a radical selected from the group consisting of a vinyl group, a carboxylic group, a hydroxyl group, and an amine group,whereby the formation of rivulets is minimised during printing with resultant improvement in image quality.