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US 6,183,947 B2Granted
Preparation method of organic silver salt dispersion and thermally processable photosensitive material
AssigneeKonica Corporation
InventorSatoshi Ito
Life of this patent
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Abstract
A method for preparing an organic silver salt dispersion is disclosed, comprising allowing silver nitrate is added to an aqueous solution or suspension of an alkali salt of an organic acid to react to form an organic silver salt dispersion, wherein the aqueous solution or suspension of an alkali salt of an organic acid is cooled at a mean cooling rate of not less than 0.5° C./min. to a temperature of 0° C. to 55° C., and then silver nitrate is added thereto.
Claims7
A method for preparing an organic silver salt dispersion comprising the steps of:
- (a) dissolving an organic acid in water at a temperature of 60 to 90° C.,
- (b) adding thereto an alkali to form an aqueous solution or suspension containing an alkali salt of the organic acid,
- (c) cooling the aqueous solution or suspension to a temperature of 0 to 55° C., and then
- (d) adding silver nitrate to the cooled aqueous solution or suspension to form an organic silver salt dispersion, wherein in step (c), the aqueous solution or suspension is cooled at a mean cooling rate of not less than 0.5° C./min.
1 more element
Dependencies are inferred from the claim text.