Radiation imagery chemistry: process – composition – or product th – Color imaging process – Using identified radiation sensitive composition in the...
Patent
1979-05-02
1981-02-03
Brown, J. Travis
Radiation imagery chemistry: process, composition, or product th
Color imaging process
Using identified radiation sensitive composition in the...
430388, 430389, 430548, 430556, 430557, 430558, G03C 700, G03C 140
Patent
active
042489610
ABSTRACT:
Light-sensitive recording material for color photography is provided which contains, in at least one silver halide emulsion layer, a yellow coupler of the formula ##STR1## in which R and R' are alkyl, cycloalkyl or aryl and X.sub.1 and X.sub.2 are radicals which are detachable during the coupling reaction, Y is halogen, alkyl, alkoxy, alkylmercapto, --CN, --COOH, carbalkoxy, --NH.sub.2, --NHR.sub.1, --NR.sub.1 R.sub.2 or --NHCOR.sub.1, in which R.sub.1 and R.sub.2 are alkyl or phenyl, Z is alkyl having 5 to 40 carbon atoms, alkoxy having 5 to 40 carbon atoms, cycloalkoxy having 5 to 12 carbon atoms or aralkyl; alkoxyalkyl, alkoxycycloalkyl, cycloalkoxyalkyl, optionally substituted phenoxyalkyl, alkylamino- and dialkylamino-alkyl, optionally substituted arylamino- and diarylamino-alkyl, alkylmercaptoalkyl or optionally substituted arylmercaptoalkyl, in which radicals the sum of the carbon atoms in each case is 6 to 40; or --COOR.sub.3, --COR.sub.3, --NR.sub.3 R.sub.4, --CONR.sub.3 R.sub.4, --NR.sub.4 COR.sub.3, --SO.sub.2 R.sub.3, --SO.sub.2 NR.sub.3 R.sub.4 or --NR.sub.4 SO.sub.2 R.sub.3, R.sub.3 is optionally substituted alkyl having 1 to 40 carbon atoms, optionally substituted cycloalkyl having 5 to 12 carbon atoms or optionally substituted phenyl and R.sub.4 is hydrogen or alkyl having 1 to 12 carbon atoms.
The couplers used according to the invention have a high coupling reactivity towards the oxidation product of the aromatic primary amine (developer), so that the developing of the silver halide emulsion proceeds rapidly.
Furthermore, an adequate color density is achieved, although the molar amont of coupler employed can be markedly reduced compared with that of known couplers.
REFERENCES:
patent: 2319426 (1943-05-01), Middleton et al.
patent: 2376679 (1945-05-01), Frohlich et al.
patent: 3077403 (1963-02-01), Trucker
patent: 3778277 (1973-12-01), Fujiwhara et al.
patent: 3960570 (1976-06-01), Oishi et al.
patent: 3990896 (1976-11-01), Arai et al.
Research Disclosure 11030, June, 1973.
Fryberg Mario
Hagen Remon
Brown J. Travis
Ciba-Geigy AG
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