Eastman-kodak Company

Carestream Health, Inc.

Xiqiang K Yang

Wojciech K Slusarek

David Howard Levy

David T Southby

Zbyslaw R Owczarczyk

Mark Edward Irving

Mridula Nair

Lyn Marie Irving

Jared B Mooberry

James Henry Reynolds

Tamara K Jones

James J Seifert

Jerrold N Poslusny

Daniel L Kapp

Dinesh Tyagi

Louis Elbert Friedrich

Jason Morgan

Benjamin P Hoag

James G Popowych

Sandra G Taft

Paul B Merkel

Lloyd A Lobo

Patrick M Lambert

Joseph Salvatore Sedita

James R Bennett

Zheng Zhi Wu

Linda B Nothhard

Zbyslaw R Owozarczyk

Zybslaw R Owczarczyk

David K Southby

James Gerard Popowych

Lloyd Anthony Lobo

Patrick Maddock Lambert

The present invention relates to a porous toner particle with encapsulated metallic flakes. The porous particle containing metallic flakes can be useful for reproduction of a metallic hue upon fusing to a substrate, preferably golden or silvery hue, and for manufacturing of printed circuits, by a printing process, especially electrophotography.

Toner containing metallic flakes and method of forming metallic image

A process for forming polymer particles with aligned pores and controlled narrow particle size distribution, including: a) forming an oil phase by dissolving a polymeric binder in a solvent; b) dispersing the oil phase into a water phase containing a controlled amount of particulate stabilizer and forming an oil-in-water emulsion of controlled narrow dispersed oil phase droplet size distribution; c) freezing the emulsion to freeze solvent in the oil droplets to form frozen solvent domains within the polymeric binder, and also the water in the continuous water phase; and d) removing the frozen solvent from the polymeric binder and the frozen water in the continuous water phase, thereby forming porous polymer particles of controlled narrow particle size distribution and containing directional aligned non-spherical pore structures. Optionally, the porous particles may contain encapsulated functional ingredients.

Process for preparing porous polymer particles

The present invention is toner particle that includes a continuous phase of binder polymer and a second phase of hydrocolloid. The particle has a porosity of at least 10 percent.

Toner porous particles containing hydrocolloids

A method of manufacturing a double emulsion with narrow dispersed phase particle size distribution comprising: providing an organic phase comprising solid hydrocolloid particles dispersed in an organic solvent; and dispersing the organic phase in an aqueous phase in the presence of a controlled amount of stabilizing agent to form an emulsion of droplets of the organic phase dispersed in the external aqueous phase, wherein the hydrocolloid particles in the organic phase droplets are swelled with water from the external aqueous phase to form internal droplets of an aqueous phase in the organic phase droplets, thereby forming a double emulsion comprising droplets of the organic phase of controlled narrow particle size distribution in the external aqueous phase, where the organic phase droplets contain internal droplets of an aqueous phase. A method for producing porous polymeric particles by such a double emulsion method, wherein the organic phase further comprises a polymer resin, and wherein the organic solvent is removed from the dispersed organic phase droplets to form porous toner particles.

Method for preparing multiple emulsion and porous polymer particles therefrom

A method for the preparation of shaped polymeric particles, and in a particular embodiment shaped electrostatographic toner particles, of controlled morphology including the following steps. A selected solvent or solvent mixture is used to dissolve a polyester polymer material to form an organic phase, wherein the polyester material is formed from at least one diol and at least one multicarboxylic aromatic acid and has a solubility parameter of greater than 9.0 (cal/cm), the selected solvent or solvent mixture includes at least a first solvent having a solubility parameter of less than 9.0 (cal/cm), and the difference in solubility parameters for the polyester material and the at least first solvent is between 1.0 and 3.0 (cal/cm). The organic phase is dispersed in an aqueous phase containing a particulate stabilizer to form a dispersion, which is then homogenized. The organic solvent is evaporated from the dispersion to form shaped polymeric particles, and the resultant product is recovered, washed and dried.

Method of preparing toner having controlled morphology

The present invention is a method for the preparation of porous particles that includes dissolving a polymer material in a first organic solvent and adding a second organic solvent and nonionic organic polymer particles to form an organic phase. The organic phase is dispersed in an aqueous phase that includes a particulate stabilizer to form a dispersion and the dispersion is homogenized. The first and second organic solvents are evaporated and the product is recovered.

Method of making porous particles

The present invention is toner particle that includes a binder resin and nonionic organic polymer particles. The particle has porosity.

Porous particles

The present invention is a method for the preparation of electrostatographic toner including the following steps. A first dispersion is prepared with a solvent, a silicone wax, and a hyperdispersant. The first dispersion is added to an organic solvent containing a polymer material to form an organic phase. The organic phase is dispersed in an aqueous phase containing a particulate stabilizer to form a second dispersion. The second dispersion is homogenized. The organic solvent is evaporated from the second dispersion and the resultant product is recovered, washed and dried. In an alternate method the hyperdispersant is added directly to the organic phase before mixing with the aqueous phase.

Silicone wax-containing toner particles with controlled morphology

The present invention is a method for the preparation of electrostatographic toner that includes the following steps. A polymer material is dissolved in an organic solvent to form an organic phase that includes a metal complex of zinc dimethyldithiocarbamate; zinc diethyldithiocarbamate; dibenzyldithiocarbamate, zinc di-n-butyldithiocarbamate. The organic phase is dispersed in an aqueous phase that includes a particulate stabilizer to form a dispersion and the resultant dispersion is homogenized. The organic solvent is evaporated and the resultant product is recovered, washed and dried.

Toner particles of controlled morphology

The present invention is a method for the preparation of electrostatographic toner including the following steps. A polymer material is dissolved in an organic solvent to form an organic phase. The organic phase is dispersed in an aqueous phase that includes a particulate stabilizer and a salt including an anion selected from chloride, oxychloride, sulfate, perchlorate, nitrate, dihydrogen phosphate, lactate, trifluoromethylsulfonate, and trifluromethylhydrate and a cation selected from aluminum, iron (III), tin (II) and zirconium (IV), to form a dispersion. The dispersion is homogenized. The organic solvent is evaporated from the dispersion and the resultant product is recovered, washed and dried. In an alternate method the salt is added directly to the dispersion.

This invention relates to an imaging element comprising an imaging layer having associated therewith a compound of Structure I: In the above Structure I, the substituents are as defined in the application. Such compounds have good reactivity and can by used to block photographically useful compounds such as developing agents until thermally activated under preselected conditions. Compounds according to the present invention are especially useful in color photothermographic imaging elements.

Imaging element containing a blocked photographically useful compound

This invention relates to an imaging element comprising an imaging layer having associated therewith a compound of Structure I: wherein:

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Webster, NY, United States of America

Xiqiang K Yang