Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Two or more radiation-sensitive layers containing other than...
Patent
1979-12-19
1982-11-16
Brown, J. Travis
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Two or more radiation-sensitive layers containing other than...
430382, 430544, 430557, 430558, 430957, G03C 140
Patent
active
043595219
ABSTRACT:
Light-sensitive color photographic material which contains on a base in at least one silver halide emulsion layer or an interlayer which is assigned to this and does not contain silver halide, at least one DIR coupler of the formula ##STR1## in which R is alkyl having 1 to 18 carbons atoms or aryl, D is hydrogen, optionally substituted alkyl having 1 to 18 carbon atoms, cycloalkyl having 3 to 10 carbon atoms, alkenyl having 2 to 18 carbon atoms, cycloalkenyl having 5 to 10 carbon atoms, aralkyl having 7 to 18 carbon atoms, cyano or halogen and G is a optionally substituted aliphatic hydrocarbon radical having 1 to 18 carbon atoms, the sum of the carbon atoms in the substituents D and G being at least 5, L.sub.1 is hydrogen or alkyl having 1 to 5 carbon atoms, L.sub.2 is alkyl having 1 to 18 carbon atoms, phenyl or phenyl substituted by halogen, alkyl or alkoxy, each having 1 to 18 carbon atoms, acylamino, sulphonamide groups or carboxamide groups and X is sulphur or selenium, and wherein the triazolyl radical released during the reaction of the coupler with an oxidation product of an aromatic developer containing primary amino groups has development-inhibiting effects.
The DIR-couplers can contribute substantially to improving interlayer color correction and to the image grain and the sharpness of the photographic images obtained after imagewise exposure and usual processing of said photographic material.
REFERENCES:
patent: 3933500 (1976-01-01), Shiba et al.
patent: 4015988 (1977-04-01), Shiba et al.
patent: 4046575 (1977-09-01), Boie et al.
patent: 4182630 (1980-01-01), Quaglia
patent: 4248961 (1981-02-01), Hagen et al.
Fryberg Mario
Hagen Remon
Scott John G. V.
Brown J. Travis
Ciba-Geigy AG
Kolodny Joseph G.
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