Eastman-kodak Company

Other

Shari L Eiff

Albert J Mura, Jr

Gary M Russo

Donald R Diehl

Mridula Nair

Christine Joanne Landry-Coltrain

David Daniel Putnam

Cumar Sreekumar

Mary H Delton

Ramanuj Goswami

J Ramon Vargas

Steven G Link

Brian Thomas

David S Bailey

Joan C Potenza

Paul A Loncle

Catherine A Franke

A surface decorated particle including a core particle phase having an outer surface; and fine inorganic particles on the outer surface of the core particle phase; wherein the fine inorganic particles have hydrophobic groups covalently bonded primarily on portions of surfaces of the fine inorganic particles positioned away from the core particle phase. Such surface decorated particles are obtainable by a method including stabilizing dispersed hydrophobic phase particles in an aqueous phase with fine inorganic particles having a relatively hydrophilic surface; and treating the stabilized dispersed hydrophobic phase particles with a hydrophobic group containing reactant to form hydrophobic groups covalently bonded to surfaces of the fine inorganic particles. In a particular embodiment, such surface decorated particles are obtainable by a limited coalescence process for preparing binder polymer particles using inorganic stabilizer particles that provide a plurality of surface bonding sites and reacting such sites with a plurality of alkoxy silane moieties that contains pendant hydrophobic groups.

Surface decorated particles

A method for forming surface decorated particles including stabilizing dispersed hydrophobic phase particles in an aqueous phase with fine inorganic particles having a relatively hydrophilic surface; and treating the stabilized dispersed hydrophobic phase particles with a hydrophobic group containing reactant to form hydrophobic groups covalently bonded to surfaces of the fine inorganic particles. In a particular embodiment, the invention provides a limited coalescence process for preparing binder polymer particles using inorganic stabilizer particles that provide a plurality of surface bonding sites and reacting such sites with a plurality of alkoxy silane moieties that contains pendant hydrophobic groups.

Method for forming surface decorated particles

The present invention relates to a cyan dye donor element for thermal transfer imaging comprising a support having thereon a dye layer comprising a mixture of at least two cyan dyes dispersed in a polymeric binder, wherein at least one of the at least two cyan dyes is a light stabilizing dye represented by Formula I and a thermal image recording method utilizing the same cyan dye donor element. The present invention also relates to a cyan inkjet dye comprising a light stabilizing cyan dye represented by Formula I.

Stabilized dyes for thermal dye transfer materials

The present invention relates to an aqueous ink comprising at least water, and a colorant of Formula 1 wherein A is any substituted or unsubstituted aromatic or heteroaromatic moiety; R is hydrogen or any non-metallic group; R1 is hydrogen, or any substituted or unsubstituted aryl, alkenyl, alkynyl or alkyl group; R2 and R3 are hydrogen or any non-metallic group, and R2 and R3 can be joined to form a ring that may be aromatic, aliphatic or heterocyclic and may be further substituted; or a colorant of Formula 2: wherein R4 is hydrogen or any non-metallic group; n is an integer of 0-4; and, if n is 2-4, the R4 groups may be the same or different from each other, and a printing method for creating an image on an ink compatible substrate using colorants of Formula 1 or Formula 2.

Inkjet inks containing azo pyrazolobenzopyrimidineone class of colorants

The present invention relates to a thermal donor comprising a dye mixture and a urea light-stabilizing compound, wherein the light-stabilizing compound is represented by structure I: wherein:

Urea stabilizers for thermal dye transfer materials

A photographic element comprises a silver halide emulsion layer having associated therewith a dye forming coupler and a combination of a carbonamide compound, a phenolic compound, and an electron-rich compound. Such a combination provides improved dye stability.

Stabilized silver halide photographic element

A photographic element comprises a silver halide emulsion layer having associated therewith a dye forming coupler and a compound of the following Formula I1: wherein

Coupler and image dye light-stabilizing systems

A photographic element comprises a light-sensitive silver halide emulsion layer having associated therewith (a) a 1H-pyrazolo[1,5-b][1,2,4]triazole dye-forming coupler; (b) a sulfonamide compound free of aromatic substituents directly linked to the sulfonamide nitrogen or sulfur atoms and (c) a dialkoxy substituted aromatic compound.

Silver halide photographic element and process

Photographic elements are disclosed comprising a silver halide emulsion layer having associated therewith a dye forming coupler and a compound of the following Formula I:RRN&#x2014;C(O)&#x2014;(R)&#x2014;C(O)&#x2014;NRRwherein R represents a hydrocarbon linking group; p=0 or 1; and each of R, R, Rand Rindependently represents an aromatic, cyclic, linear or branched chain hydrocarbon group, or Rand Ror Rand Rcombine together to form a ring with the associated nitrogen atom to which they are attached; with the proviso (i) at least one of R, R, Rand Rcomprises an aromatic, cyclic, secondary alkyl, or otherwise or branched hydrocarbon group, or (ii) at least Rand Ror Rand Rcombine together to form a ring with the associated nitrogen atom. Photographic elements of the present invention upon exposure and photographic processing exhibit good activity and yield dye images that have unexpected and substantial improvements in the stability of the formed image dyes.

Photographic element with dye-forming coupler and image dye stabilizing coupler solvent

Photographic element containing improved stabilizer

Photographic elements are disclosed comprising a silver halide emulsion layer having associated therewith a magenta coupler and a magenta dye stabilizer compound of the formula S-I: ##STR1## wherein R.sup.0 represents an aryl group or a heterocyclic group; L.sub.1 and L.sub.2 are independently linear alkylene or cycloalkylene linking groups; and R.sup.a and R.sup.b are independently selected substituent groups at least one of which has a .sigma.* value of at least 1.8. Compounds in accordance with formula S-I act as singlet oxygen quenchers and are effective stabilizers for magenta dye images. Photographic elements of the present invention upon exposure and photographic processing yield magenta dye images that have low fading when exposed to light.

Photographic element with new singlet oxygen quenchers

An aqueous-developable chromogenic photographic heat-transferable non-aqueous dye-diffusion-transfer photographic element is disclosed, wherein said element comprises radiation sensitive silver halide, a dye-providing compound that forms or releases a heat-transferable image dye upon reaction of said compound with the oxidation product of a primary amine developing agent, a hydrophilic binder, and a thermal solvent for facilitating non-aqueous diffusion transfer according to formula (I) ##STR1## wherein AH is a hydrogen bond donating group with an aqueous pK.sub.a value for proton loss of greater than 6;

Hydrogen bond accepting groups on thermal solvents for image separation

Tetra-substituted aryl cyclic formazan dyes are useful in assaying for lithium. The dyes have the structure: ##STR1## in which X represents CN or NO.sub.2 ;

Assay for lithium using tetra-substituted aryl cyclic formazan dyes

Novel tetra-substituted aryl cyclic formazan dyes are useful in assaying for Li.sup.+.

Growing community of inventors

Rush, NY, United States of America

Shari L Eiff