Radiation imagery chemistry: process – composition – or product th – Color imaging process – Using identified radiation sensitive composition in the...
Patent
1979-06-11
1980-12-09
Brown, 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
042385644
ABSTRACT:
Recording material for color photography, which contains, in at least one silver halide emulsion layer, at least one yellow coupler of the formula ##STR1## in which R.sub.1, R.sub.2, and R.sub.3 and R.sub.4 are alkyl, cycloalkyl or aryl, X.sub.1, X.sub.2, X.sub.3 and X.sub.4 are radicals detachable during the coupling reaction and Y.sub.1 and Y.sub.2 are halogen, alkyl, alkoxy, alkylmercapto, --CN, --COOH, carbalkoxy, --NH.sub.2, --NHR.sub.5, --NR.sub.5 R.sub.6 or --NHCOR.sub.5, in which R.sub.5 and R.sub.6 are alkyl or phenyl, Z is a divalent bridge member and r is 1 or 2.
Photographic colored images with excellent spectral absorption characteristics and good resistance to light, heat and moisture are obtained by exposing the recording material image-wise and developing.
REFERENCES:
patent: 2319426 (1943-05-01), Middleton et al.
patent: 2367036 (1945-01-01), McQueen
patent: 2376679 (1945-05-01), Frohlich et al.
patent: 2718466 (1955-09-01), Wolfson
patent: 3077403 (1963-02-01), Trucker
patent: 3778277 (1973-11-01), Fujiwhara et al.
Brown Travis
Ciba-Geigy Aktiengesellschaft
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