Radiation imagery chemistry: process – composition – or product th – Microcapsule – process – composition – or product
Patent
1988-07-28
1990-07-03
Michl, Paul R.
Radiation imagery chemistry: process, composition, or product th
Microcapsule, process, composition, or product
430281, 430617, 430619, 430755, G03C 168, G03C 172
Patent
active
049390643
ABSTRACT:
A light-sensitive material comprises a support and a light-sensitive layer containing silver halide, a reducing agent, an ethylenic unsaturated polymerizable compound and a base precursor in the form of a salt of an organic base with a carboxylic acid. The silver halide, reducing agent, polymerizable compound and base precursor are contained in microcapsules which are dispersed in the light-sensitive layer. The organic base of the base precursor is a diacidic to tetraacidic base which is composed of two to four amidine moieties and at least one linking group for the amidine moieties. The linking group is a residue of a hydrocarbon or a heterocyclic ring. The amidine moiety corresponds to an atomic group formed by removing one or two hydrogen atoms from an amidine having the following formula (I): ##STR1## wherein each of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently is hydrogen, an alkyl group, an alkenyl group, an alkynyl group, a cycloalkyl group, an aralkyl group, an aryl group or a heterocyclic group, and any two of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 may be combined together to form a five-membered or six-membered heterocyclic ring consisting of nitrogen and carbon atoms.
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Doody Patrick A.
Fuji Photo Film Co. , Ltd.
Michl Paul R.
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