Xerox Corporation

Scott D Chamberlain

John W Spiewak

David H Pan

George Amos Gibson

Christopher M Knapp

Frank J Bonsignore

James R Larson

Roger N Ciccarelli

Jacques C Bertrand

Thomas R Pickering

Denise R Bayley

Constance J Thornton

Edward Blair Caruthers

Mary Ann Machonkin

A liquid developer comprised of a liquid, resin particles, an optional nonpolar liquid soluble charge director, and a charge adjuvant comprised of an aluminum salt of an acid, wherein the acid is a hydroxy carboxylic acid, an amino carboxylic acid, an aromatic carboxylic acid, an aliphatic carboxylic acid, or a sulfonic acid and imaging processes using the same one disclosed.

Developer compositions and imaging processes

A positively charged liquid developer comprised of a nonpolar liquid, thermoplastic resin particles, pigment, a charge director, and a charge control agent comprised of a PEO:PPO, preferably in a solid form.

Liquid developer compositions with copolymers

A liquid developer comprised of a nonpolar liquid, resin, optional colorant, a charge director, and an optional charge control agent, and wherein the charge director is comprised of a mixture of phosphoric acid esters I, II and III, and IV a nonpolar liquid soluble organic aluminum complex of the formulas ##STR1## hydrates thereof or mixtures thereof, wherein R.sub.1 is selected from the group consisting of hydrogen and alkyl, and n represents a number of from about 1 to about 6.

Liquid developer compositions

A process for the reduction of residual image voltage present on an imaging member which comprises contacting the member with a composition comprised of a nonpolar liquid, thermoplastic resin particles, an optional charge adjuvant, charge control additive, carbon black pigment, and a charge director comprised of a nonpolar liquid soluble organic aluminum complex, or mixtures thereof of the formulas ##STR1## wherein R.sub.1 is selected from the group consisting of hydrogen and alkyl, and n represents a number, and wherein said voltage is reduced to from about zero to about 25 volts.

Charging neutralization processes

A positively charged liquid developer comprised of a nonpolar liquid, thermoplastic resin particles, pigment, a charge director, and a charge control agent comprised of Rhodamine Y.

Liquid developer compositions with rhodamine

A negatively charged liquid developer comprised of a nonpolar liquid, a mixture of a first and a second thermoplastic resin with dissimilar melt indexes, a pigment, charge director, optional charge adjuvent, a charge control agent comprised of a component of the alternative formulas ##STR1## wherein R.sub.1 is selected from the group consisting of hydrogen and alkyl, and n is 0 (zero), 1, 2, 3, or 4, and wherein the melt index of the first resin is from about 50 to about 800 grams, and the melt index of the second resin from about 850 to about 2,500 grams.

Developer compositions

A positively charged liquid developer comprised of a nonpolar liquid, thermoplastic resin, a cyclodextrin charge control additive, pigment, and a charge director comprised of a nonpolar liquid soluble organic aluminum complex, or mixtures thereof of the formulas ##STR1## wherein R.sub.1 is selected from the group consisting of hydrogen and alkyl, and n represents the number of R substituents.

A mixed resin liquid developer and a process for the preparation of liquid developers comprised of a nonpolar liquid, a mixture of thermoplastic resin particles, a charge director, and a charge control agent, the process characterized by the addition of a first thermoplastic resin and a charge control agent, followed by adding to the product obtained a second thermoplastic resin.

Liquid developers and methods thereof

A positively charged liquid developer comprised of a nonpolar liquid, thermoplastic resin particles, pigment, a charge director, and a charge control agent comprised of a cyclodextrin or a cyclodextrin derivative containing one or more organic basic amino groups.

Liquid developer compositions with cyclodextrins

A positively charged liquid developer comprised of a nonpolar liquid, thermoplastic resin particles, an optional charge adjuvant, optional pigment, and a charge director comprised of a mixture of I. a nonpolar liquid soluble organic phosphate mono and diester mixture derived from phosphoric acid and isotridecyl alcohol, and II. a nonpolar liquid soluble organic aluminum complex, or mixtures thereof of the formulas ##STR1## wherein R.sub.1 is selected from the group consisting of hydrogen and alkyl, and n represents a number.

A liquid developer comprised of a nonpolar liquid, thermoplastic resin particles, a charge adjuvant, pigment, and a charge director selected from the group consisting of the triblock polymers BAA', BA'A, and ABA' wherein A, A' and B represent polymer segments or blocks, the polar A block repeat units contain an alkylated or protonated ammonium charged site and the polar A' block repeat units contain an acid group of a pKa equal to or less than about 7.0, and wherein the nonpolar B block repeat units contain aliphatic hydrocarbon solubilizing groups; and wherein the A and A' block number average molecular weights range from about 200 to 120,000, and the B block number average molecular weights range from about 2,000 to 190,000; and the total number average molecular weight of said charge director is from about 2,400 to about 300,000, and the ratio of M.sub.w to M.sub.n for said charge director is 1 to 5.

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Macedon, NY, United States of America

Scott D Chamberlain