Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing
Patent
1991-12-02
1993-12-28
Bowers, Jr., Charles L.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Silver compound sensitizer containing
430603, 430604, 430605, G03C 109
Patent
active
052738744
ABSTRACT:
A silver halide photographic material comprises a silver halide emulsion layer provided on a support. In the photographic material of the present invention, the silver halide emulsion is sensitized with a new tellurium sensitizer. The tellurium sensitizer is represented by the formula (I) or (II): ##STR1## in which each of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently is an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aralkyl group, an aryl group, a heterocyclic group or an acyl group; at least two of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are combined with each other to form a heterocyclic ring; R.sup.5 is an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aralkyl group, an aryl group or a heterocyclic group; R.sup.6 is --NR.sup.7 R.sup.8, --NR.sup.9 --NR.sup.10 R.sup.11 or --OR.sup.12 ; R.sup.5 and R.sup.6 may be combined with each other to form a heterocyclic ring; each of R.sup.7, R.sup.8, R.sup.9, R.sup.10, R.sup.11 and R.sup.12 independently is an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aralkyl group, an aryl group or a heterocyclic group; R.sup.7 and R.sup.8 may be combined with each other to form a heterocyclic ring; and R.sup.9 and R.sup.11 or R.sup.10 and R.sup.11 may be combined with each other to form a heterocyclic ring.
REFERENCES:
patent: 1602591 (1926-10-01), Sheppard
patent: 4810626 (1989-03-01), Burgmaier et al.
patent: 5015567 (1991-05-01), Suga et al.
Kojima Tetsuro
Mifune Hiroyuki
Bowers Jr. Charles L.
Chea Thorl
Fuji Photo Film Co. , Ltd.
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