Processes for the preparation of liquid developers with low vapor pressure components

摘要

A process for the preparation of liquid developer compositions which comprises mixing a resin with a low vapor pressure oil at elevated temperatures permitting the resin to melt and enabling the formation of a resin oil mixture; thereafter adding to the oil resin mixture at elevated temperature pigment particles, and stirring until the pigment has become dispersed in the resin; followed by attriting the mixture while cooling, for example, to ambient temperatures; thereafter filtering the aforementioned mixture, and dispersing the product in a low viscosity oil; and subsequently adding to the formed mixture a change control additive.