Liquid developer compositions with aluminum hydroxycarboxylic acids
AssigneeXerox Corporation
InventorsJames R. Larson, Bing R. Hsieh
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Abstract
A liquid developer comprised of a liquid, thermoplastic resin particles, a nonpolar liquid soluble charge director, and a charge adjuvant comprised of a metal hydroxycarboxylic acid.
Claims28
A negatively charged liquid developer comprised of a nonpolar liquid, thermoplastic resin particles, a nonploar liquid soluble ionic or zwitterionic charge director, and a charge adjuvant comprised of an aluminum hydroxycarboxylic acid, or mixtures thereof;
- and wherein said charge adjuvant is incorporated into said thermoplastic resin particles and said thermoplastic resin particles are dispersed in said nonpolar liquid and said liquid soluble charge director.
A negatively charged liquid electrostatographic developer consisting essentially of a dispersion of nonpolar liquid, thermoplastic resin particles, pigment particles, a nonpolar liquid soluble ionic or zwitterionic charge director compound, and a charge adjuvant comprised of an aluminum hydroxycarboxylic acid;
- and wherein said dispersion consists essentially of particles of said thermoplastic resin having incorporated therein, said pigment and said charge adjuvant in said nonpolar liquid and said charge director compound.
A negatively charged liquid electrostatographic developer comprised of (A) a nonpolar liquid having a Kauri-butanol value of from about 5 to about 30 and present in a major amount of from about 50 percent to about 95 weight percent;
- (B) thermoplastic resin particles having an average volume particle diameter of from about 5 to about 30 microns, and pigment particles;
- (C) a nonpolar liquid soluble ionic or zwitterionic charge director compound;
- and (D) a charge adjuvant comprised of aluminum hydroxycarboxylic acid, the corresponding hydrates, or mixtures thereof;
- and wherein said pigment particles and said charge adjuvant are incorporated into said thermoplastic resin particles and said thermoplastic resin particles are dispersed in a mixture of said nonpolar liquid and said charge director compound.
Dependencies are inferred from the claim text.