Micro-particle dispersion having hydrophobic protective colloid and method of manufacture thereof, photosensitive emulsion and method of manufacturing thereof, and silver salt photohermographic dry imaging material utilizing the same
AssigneeKonica Minolta Medical & Graphic, Inc.
InventorsHiroto Ito, Kazuhito Ihara
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Abstract
A method of manufacturing a micro-particle dispersion having a hydrophobic protective colloid comprising the steps of: (a) dispensing micro-particles in a hydrophilic dispersant to form a hydrophilic micro-particle dispersion having the hydrophilic dispersant as a protective colloid, and (b) adding a dispersant to the hydrophilic micro-particle dispersion, the dispersant having a functional group capable of ion bonding with a hydrophilic group of the hydrophilic dispersant.
Claims4
A photothermographic material comprising a micro-particle dispersion dispersed in an organic solvent having a water content of not more than 10%, the micro-particle dispersion having a hydrophobic protective colloid and manufactured by a method comprising the steps of:
- (a) dispersing micro-particles in a hydrophilic dispersant to form a hydrophilic micro-particle dispersion having the hydrophilic dispersant as a protective colloid, and
- (b) adding a dispersant to the hydrophilic micro-particle dispersion, the dispersant having a functional group capable of ion bonding with a hydrophilic group of the hydrophilic dispersant.
A photothermographic material comprising a support having thereon a layer containing a photosensitive emulsion, photo-insensitive organic silver salt grains and a binder, wherein the photosensitive emulsion comprises a micro-particle dispersion dispersed in an organic solvent having a water content of not more than 10% and having a hydrophobic protective colloid, wherein the micro-particles are silver halide grains, and
- wherein the micro-particle dispersion is manufactured by a method comprising the steps of:
- (a) dispersing micro-particles in a hydrophilic dispersant to form a hydrophilic micro-particle dispersion having the hydrophilic dispersant as a protective colloid, and
- (b) adding a dispersant to the hydrophilic micro-particle dispersion, the dispersant having a functional group capable of ion bonding with a hydrophilic group of the hydrophilic dispersant.
Dependencies are inferred from the claim text.