Acetone → Silver bromide

Participants

Reaction Conditions

Reaction Steps

A solution prepared by dissolving 8.6 g of capric acid in 100 ml of butyl acetate was cooled to 50° C. and, while stirring, 20 ml of a 2.5% by weight acetone solution of N-bromosuccinimide was added thereto. To this mixture was added 50 ml of an aqueous solution (pH=9.5) of silver nitrate-ammonium complex salt containing 8.5 g of silver nitrate (cooled to 5° C.) to thereby react capric acid, N-bromosuccinimide and silver ion with each other to simultaneously form both silver caprate and silver bromide. The resulting solid phase containing silver caprate and silver bromide was collected (80 g) by centrifugation and dispersed in 120 g of a 15% isopropanol solution of polyvinyl butyral using a mixer to prepare a silver salt polymer dispersion (Polymer dispersion C). To Polymer dispersion C was added 2 cc of a 0.1 wt% aqueous solution of potassium thiosulfate and, after heating for 20 minutes at 40° C. (heating in the presence of the sulfur-containing compound for sensitizing), 72 ml of a 70 wt% methyl cellosolve solution of p-phenylphenol heated to 40° C. was added to prepare a coating dispersion. This was coated on a clay-coated paper in an amount of 0.7 g silver/m2 to prepare a thermally developable light-sensitive material, Sample 7.

Provenance & Evidence