Preparing Amorphous Polyester Resin Emulsions

摘要

A process for making a latex emulsion including contacting at least one amorphous polyester resin with at least two organic solvents to form a resin mixture, adding a neutralizing agent, and deionized water to the resin mixture, removing the solvent from the formed latex, and separating the solvent from water. Further, the process is carried out above the resin Tg for making the latex, which drives the latex particle size under 100 nm, where toners made from the latex show improved charging performance.

主权项

1. A method comprising:
a) combining an amorphous resin, at least two solvents, a first base and water to form a mixture; b) heating the mixture at a temperature near to or greater than the Tg of the amorphous resin to form an emulsion; and c) evaporating the solvents from the emulsion, wherein the resulting resin latex has a particle size of 100 nm or less.