Block copolymer amine salts as charge directors for negative electrostatic liquid developer.

摘要

A negative-working electrostatic liquid developer consists essentially of a nonpolar liquid having Kauri-butanol value less than 30; thermoplastic resin particles having an average particle size by area of less than 10 mu m; a salt of an AB diblock copolymer charge director compound as defined; and optionally a colorant and charge adjuvant; and process of making same.