Light-sensitive material containing silver halide, reducing agen

Details Light-sensitive material containing silver halide, reducing agen Light-sensitive material containing silver halide, reducing agen

1990-06-20

1991-08-13

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Microcapsule, process, composition, or product

430203, 430281, 430617, 430619, G03C 168, G03C 172

Patent

active

050395890

ABSTRACT:
A light-sensitive material comprising a support and a light-sensitive layer provided thereon is disclosed. The light-sensitive layer contains silver halide, a reducing agent, an ethylenically unsaturated polymerizable compound and a base precursor composed of a salt of a carboxylic acid with an organic base. The silver halide, reducing agent, polymerizable compound and base precursor are contained in microcapsules which are dispersed in the light-sensitive layer. The microcapsules are obtained by (1) dispersing the base precursor in water, (2) emulsifying the resulting dispersion in the polymerizable compound, (3) further emulsifying the resulting emulsion in an aqueous medium containing a nonionic water-soluble polymer and (4) forming the shell of the microcapsules. It is preferred that the base precursor is dispersed in water in the presence of a nonionic water-soluble polymer or an emphoteric water-soluble polymer, and the resulting dispersion is emulsified in the polymerizable compound.

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patent: 4939064 (1990-07-01), Nakamura
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