Eastman-kodak Company

David Charles Boris

Teresa Joy Hosmer

Mridula Nair

Anita M Fees

Rukmini B Lobo

Scott A Strong

Lloyd A Lobo

Kevin M Donovan

Tamara K Jones

Dennis J Massa

Ryan B Adams

Charles P Lusignan

Dennis Jon Massa

Anita Marie Fees

Polymeric porous particles have a continuous organic solid phase and at least two sets of discrete pores that are isolated from each other within the continuous phase and that have different average sizes. One set of discrete pores has a larger average size than another set of discrete pores by at least 50%. At least one set of discrete pores is free of detectably different marker materials. There porous particles can be prepared using evaporative limited coalescence techniques with especially chosen discrete pore stabilizing hydrocolloids to protect the pores during formation and to provide the different average sizes. The resulting porous particles can be incorporated into articles of various types and having various shapes.

Particles with designed different sized discrete pores

Polymeric porous particles have a continuous solid phase and at least two sets of discrete pores that are isolated from each other within the continuous phase and that have different average sizes. One set of discrete pores has a larger average size than another set of discrete pores by at least 50%. At least one set of discrete pores is free of detectably different marker materials. There porous particles can be prepared using evaporative limited coalescence techniques with especially chosen discrete pore stabilizing hydrocolloids to protect the pores during formation and to provide the different average sizes.

An inkjet printing fluid composition including water, a colorant, and a first polymer and a second polymer, wherein the first and second polymers have interactive functional groups and the second polymer is selected to form in the fluid a water soluble associated complex with the first polymer. Each of the first and second polymers are present at a concentration of at least 0.1 wt %, and the first and second polymers are present at a combined concentration of at least 1 wt %.

Inkjet printing fluid composition

An inkjet ink comprising water, colorant, and a dynamic surface active agent at an effective concentration such that dynamic surface tension DSTat 20 minutes universal surface age is less than each of dynamic surface tension DSTat 1 second universal surface age and dynamic surface tension DSTat 10 seconds universal surface age, and the difference between DSTand DSTis greater than 9.2 mN/m at 21&#xb0; C. or the difference between DSTand DSTis greater than 15.5 mN/m at 21&#xb0; C., and static surface tension of the ink is less than 50 mN/m. Large dynamic surface tension differences between the indicated time scales yield an optical density improvement in printed images. Anionic fluorosurfactant comprising a phosphate group at concentrations up to about 1 weight percent enables a combination of high optical density and good felt wetting in inkjet cartridges.

Inkjet ink comprising dynamic surface tension agent

An inkjet ink comprising water, colorant, and a dynamic surface active agent at an effective concentration such that the ink has a dynamic surface tension DSTat 1 second universal surface age, a dynamic surface tension DSTat 10 seconds universal surface age and a dynamic surface tension DSTat 20 minutes universal surface age, where DSTis less than each of DSTand DST, and the difference between DSTand DSTis greater than 9.2 mN/m at 21&#xb0; C. or the difference between DSTand DSTis greater than 15.5 mN/m at 21&#xb0; C., and wherein the static surface tension of the ink is less than 50 mN/m. Maintaining a relatively large dynamic surface tension difference between the indicated time scales yields an optical density improvement in printed images.

The present invention is a method of manufacturing toner particles that includes providing a first emulsion of a first aqueous phase comprising a pore stabilizing hydrocolloid dispersed in an organic solution containing a polymer. The first emulsion is dispersed in a second aqueous phase to form a second emulsion that is sheared in the presence of a stabilizing agent to form droplets of the first emulsion in the second aqueous phase. The organic solution is evaporated from the droplets to form porous toner particles.

Toner manufacturing method

Disclosed is a protective transparent overcoat comprising a protective polymer and a surfactant compound having multiple non-end-group hydrogen bonding groups directly or indirectly bonded to the backbone chain of the surfactant compound. The coating enables simplified manufacturing of a thermal sublimation dye transfer donor of high quality.

Protective overcoat and process for thermal dye sublimation prints

A method of reducing the tendency toward formation of coating non-uniformities in the coating of multilayer photographic elements is disclosed. More particularly, the present invention involves the coating of a non-gelatin coating over a topmost gelatin layer in a photographic element. In one embodiment, a processing-solution-permeable overcoat is simultaneously coated with the emulsion layers onto a photographic substrate, which overcoat becomes water and stain resistant in the photochemically processed product. In the latter embodiment, the overcoat formulation comprises at least one water-dispersible hydrophobic polymer interspersed with a water-soluble polymer.

Method for simultaneously coating a non-gelatin layer adjacent to a gelatin-containing layer

A method and apparatus are provided for the measuring osmotic pressure of a solution. A sample of a solution is placed into a sample cell above a membrane supported in the sample cell and the sample cell is sealed. Gas at an elevated pressure is introduced into the sample cell to drive a quantity of dialyzate through the membrane and into a transparent dialyzate exit tube adapted to receive the dialyzate which passes through the membrane. The elevated pressure of the gas is varied through a pressure regulator to yield a substantially stationary dialyzate meniscus in the transparent dialyzate exit tube. The pressure in the sample cell is measured by reading a pressure gauge showing the elevated pressure of the gas that yielded the substantially stationary dialyzate meniscus, the elevated pressure of the gas being substantially equivalent to the osmotic pressure of the sample.

Method and apparatus for measuring osmotic pressure

A method is provided for determining the concentration of a solution having a predetermined osmotic pressure and/or for generating a solution with a predetermined osmotic pressure. The method is performed by placing a sample of a solution into a sample cell, the sample cell including therein a membrane supported therein; sealing the sample in the sample cell; introducing gas at a predetermined elevated pressure substantially equal to the predetermined osmotic pressure; and generating a dialyzate by allowing the solution to dialyze through the membrane until equilibrium is achieved and no more dialyzate passes through while the sample cell is maintained at the predetermined elevated pressure, the sample remaining in the sample cell having an osmotic pressure substantially equal to the predetermined elevated pressure; collecting the dialyzate of said generating step; and weighing the dialyzate of said collecting step to determine the concentration of the solution remaining in the sample cell.

Method for generating a solution with a predetermined osmotic pressure

A method is provided which allows for monitoring changes in osmotic pressure of a sample as a function of time and/or temperature. This is accomplished by placing a sample of a solution at an initial temperature into the sample cell above the membrane supported in the sample cell; sealing the sample in the sample cell; introducing gas at an elevated pressure to the sample cell to generate a dialyzate by allowing a portion of the solution to dialyze through the membrane; varying the elevated pressure of the gas until equilibrium across the membrane is substantially achieved; changing the temperature of the solution over time; measuring the osmotic pressure at predetermined intervals of time; and calculating the changes in the osmotic pressure. Alternatively, the method for monitoring changes in osmotic pressure of a sample (wherein the changes are the result of a chemical reaction generated in the sample cell) can be practiced by placing a sample of a solution at an initial temperature into a sample cell above a membrane supported in the sample cell; adding reactants to the sample; sealing the sample and reactants in the sample cell; introducing gas at an elevated pressure to the sample cell to generate a dialyzate by allowing a portion of the solution to dialyze through the membrane; varying the elevated pressure of the gas until equilibrium across the membrane is substantially achieved; measuring the osmotic pressure at predetermined intervals of time; and calculating the changes in the osmotic pressure.

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Webster, NY, United States of America

David Charles Boris