Eastman-kodak Company

Heidelberger Druckmaschinen Ag

Jeanne Ellen Kaeding

Dennis E Smith

Gregory E Missell

Richard J Kapusniak

Michel Frantz Molaire

John Leonard Muehlbauer

William T Gruenbaum

Jeffrey W Leon

Douglas E Bugner

Alan R Pitt

Trevor J Wear

Paul B Merkel

Christine Joanne Landry-Coltrain

Wayne Thomas Ferrar

Domenic Santilli

Louis J Rossi

Paul M Borsenberger

Susan A Visser

Theodore Zubil

Steven J Spinelli

David S Hays

Louis J Sorriero

David Steven Weiss

Peter John Ghyzel

Norman G Rule

Bruce J Murray

Khe C Nguyen

Jeffrey R Murray

Jane Robinson Cowdery-Corvan

Robert E Mccovick

Charles Eugene Romano

Peter J Corvan

Dennis E Smth

Cesar Rodriguez

Henry V Issacson

The present invention discloses a water dispersible polymer particle stabilized by a hydrophobically capped oligomeric acrylamide dispersant. The present invention also discloses a heterogeneous method for forming polymer particles comprising providing a water immiscible organic phase comprising at least one monomer dispersed in a continuous water phase and a hydrophobically capped oligomeric acrylamide, and polymerizing said organic phase to yield polymer particles stabilized with hydrophobically capped oligomeric acrylamide. Also disclosed in the present invention is a heterogeneous method for forming polymer particles comprising providing a water immiscible organic dispersed in a continuous water phase, polymerizing said organic phase, and adding bydrophobically capped oligomeric acrylamide to yield polymer particles stabilized with hydrophobically capped oligomeric acrylamide.

Polymer particle stabilized by dispersant and method of preparation

The present invention discloses an ink printing method including the steps of:

Ink printing method utilizing stabilized polymeric particles

An amorphous mixture consisting essentially of TiOFPc and TiOPc and containing more than 75 weight percent of substantially chlorine-free TiOPc is produced by forming a mixture of crude crystalline TiOFPc and crude crystalline, substantially chlorine-free TiOPc that contains less than 80 weight percent TiOPc, treating the mixture under conditions effective to form a substantially amorphous mixture of TiOFPc and TiOPc containing less than 75 weight percent TiOPc, which is then treated with water, and dried. A further amount of crude crystalline, substantially chlorine-free TiOPc sufficient to form a new mixture containing more than 75 weight percent of substantially chlorine-free TiOPc is added, and the new mixture is converted to a substantially amorphous mixture of TiOFPc and TiOPc. A nanoparticulate cocrystalline composition is obtained by forming a slurry in an organic solvent of the dried substantially amorphous mixture, and wet milling the slurry to form the cocrystalline composition.

Two-stage milling process for preparing cocrystals of titanyl fluorophthalocyanine and titanyl phthalocyanine, and electrophotographic element containing same

In a process for forming an amorphous TiOPc/TiOFPc pigment mixture containing a low concentration of TiOFPc, a mixture containing phthalonitrile and titanium tetrachloride is subjected to reaction conditions effective to form lightly chlorine-substituted crude crystalline Cl&#x2014;TiOPc. The lightly chlorine-substituted crude crystalline Cl&#x2014;TiOPc is combined with crude crystalline TiOFPc in a weight ratio from about 75:25 Cl&#x2014;TiOPc:TiOFPc to about 99.5:0.5 Cl&#x2014;TiOPc:TiOFPC to form a crude crystalline pigment mixture, which is treated under conditions effective to form a substantially amorphous pigment mixture of Cl&#x2014;TiOPc and TiOFPc. The substantially amorphous mixture can subsequently be converted to a nanocrystalline Cl&#x2014;TiOPc/TiOFPc pigment composition containing a low concentration of TiOFPc.

Cocrystals containing high-chlorine titanyl phthalocyanine and low concentration of titanyl fluorophthalocyanine, and electrophotographic element containing same

An ink recording element is described comprising a support having thereon at least one image-receiving layer comprising polymeric particles in a polymeric binder, wherein the polymeric particle is stabilized by a hydrophobically-capped oligomeric acrylamide dispersant.

Ink recording element containing stabilized polymeric particles

An ink jet printing method having the steps of: A) providing an ink jet printer that is responsive to digital data signals; B) loading the printer with an ink jet recording element having a support having thereon an image-receiving layer of porous polymeric particles in a polymeric binder, the porous polymeric particles being prepared in the presence of an anionic or ationic dispersant, and the image-receiving layer containing a surfactant having a charge opposite to that of the dispersant used to make the porous polymeric particles, the surfactant being present in an amount from about 0.04 parts to about 0.30 parts by weight of the dispersant; C) loading the printer with an ink jet ink composition; and D) printing on the ink jet recording element using the ink jet ink composition in response to the digital data signals.

Ink jet printing method

The present invention relates to a method of forming porous particles comprising preparing a mixture of an organic phase and an aqueous phase comprising an unsaturated polyester, a water immiscible organic solvent, at least one organic-soluble ethylenically unsaturated monomer, and initiator, subjecting said mixture to high energy emulsification, initiating crosslinking of said polyester after emulsification, removing said water immiscible organic solvent to recover porous polyester particles.

Method of preparation of porous polyester particles

Core/shell particles having a core of a porous polymer and a shell of an inorganic colloid, the inorganic colloid having a median diameter of less than about 0.07 &mgr;m, and the core/shell particles having a median diameter of less than about 50 &mgr;m.

Porous polymer particles and method for preparation thereof

An ink jet recording element having a support having thereon an image-receiving layer of porous polymeric particles in a polymeric binder, the porous polymeric particles being prepared in the presence of an anionic or cationic dispersant, and the image-receiving layer containing a surfactant having a charge opposite to that of the dispersant used to make the porous polymeric particles, the surfactant being present in an amount from about 0.04 parts to about 0.30 parts by weight of the dispersant.

Ink jet recording element

An electrophotographic element comprises: an electrically conducting layer, a charge generating layer overlying the electrically conducting layer, and a charge transport layer overlying the electrically conducting layer. The charge transport layer, which can be an overcoat overlying the charge generating layer, comprises the reaction product in an aqueous medium of a mixture comprising a silsesquioxane polymer and a hole transport compound that comprises a tertiary arylamine containing at least one alcoholic or one phenolic hydroxy substituent.

Silsesquioxane compositions containing tertiary arylamines for hole transport

An ink jet recording element comprising a support having thereon an image-receiving layer comprising at least about 70% by weight of porous polymeric particles in a polymeric binder, the porous polymeric particles having a core/shell structure comprising a porous polymeric core covered with a shell of a water-soluble polymer.

An ink jet recording element comprising an opaque support having thereon an image-receiving layer comprising porous polymeric particles in a polymeric binder, the porous polymeric particles having a median diameter of less than about 1 &mgr;m and having a degree of crosslinking of about 27 mole % or greater.

Growing community of inventors

Rochester, NY, United States of America

Jeanne Ellen Kaeding