International Business Machines Corporation

Lexmark International, Inc.

Michael Thomas Moore

John Melvin Olson

Vincent Wen-Hwa Ting

Bryan Michael Blair

Robert B Champ

Bryan Patrick Livengood

James Craig Minor

Laura Lee Kierstein

Michelle Kathryn Morris

Garry Dale Hinch

Donald A Stremel

Eric L Ziercher

Howard W Anderson

Robert S Cutler

Minerva Piffarerio

Paul Dwight Kemmesat

Michael George Sloan

Larry D Bowden

Jodi Lynne Walsh

Karin Ann Voll

A dry, powder electrostatic toner having polyester resin as a binder, pigment as a colorant, charge control ingredients polyethylene wax as a release agent, and extra particulate elements to improve flow and to scrub the doctor blade, one extra particular element is hydrophilic rutile acicular titanium oxide with aluminum oxide surface treatment, two silicas are blended within the bulk of the toner, one of BET surface area of about 30 m /g and one of BET surface area of about 380 m /gn; and an organoboron complex negative exchange control agent is blended with a quaternary ammonium salt of an aluminosilicate compound negative charge control agent. Improved functioning as a toner is realized.

Toner formulations

Toner particulates comprise a styrene/acrylic copolymer having a first aliphatic hydrocarbon wax incorporated therein during polyermization of the copolymer, and a second aliphatic hydrocarbon wax mixed with the copolymer.

Toner particulates comprising aliphatic hydrocarbon waxes

Toner particulates include a first resin comprising a cross-linked copolymer; a second resin comprising a non-cross-linked copolymer; and a wax comprising an ethylene propylene copolymer. The cross-linked copolymer is a copolymer other than the wax comprising an ethylene propylene copolymer and the non-cross-linked polymer is a copolymer other than the wax comprising an ethylene propylene copolymer.

Toner particulates comprising an ethylene propylene wax

An electrophotographic photoconductor containing an aromatic polycarbonate binder resin and silicone microspheres provides improved wear resistance, increased useful life of the photoconductive drum, a high quality image over the life of the photoconductor, and improved coating uniformity.

Photoconductor containing silicone microspheres

An ink jet printing ink is first formulated in concentrated form, and in this form it is subjected to stressful operating conditions such as an elevated temperature. This stress causes particle formation. After filtration to remove these particles, the final ink formulation is prepared, including for the first time ingredients which inhibit particle formation.

Ink jet inks and method of making

An aqueous blue ink for use in ink jet printing, the ink being a mixture of a blue dye, a cyan dye, a styrene/acrylic binder, water and ammonia as a volatile solubilizing constituent.

Ink jet ink composition

A layered electrophotographic plate having a triaryl pyrazoline containing charge transport layer and a charge generation layer having a photogenerating dye of the composition: ##STR1##

Layered electrophotographic plate having tetramethyl benzidene based

A process for electrophotographic reproduction, and a layered electrophotographic plate having a conventional charge generation layer and a p-type hydrazone containing charge transport layer, in which the surface of the charge transport layer is selectively discharged by actinic radiation as a result of the migration through the transport layer of charges generated in the charge generation layer as a result of the actinic radiation and injected into the transport layer, the hydrazone having the composition; ##STR1##

Growing community of inventors

Longmont, CO, United States of America

Michael Thomas Moore