C - Chemistry – Metallurgy – 09 – B
Patent
C - Chemistry, Metallurgy
09
B
96/118, 260/300
C09B 57/00 (2006.01) G03C 7/00 (2006.01) G03C 7/384 (2006.01)
Patent
CA 1143378
Abstract of the Disclosure Light-sensitive recording material for colour photography, which contains, in at least one silver hal- ide emulsion layer, at least one magenta coupler of the formula Image in which A is a 5-membered, heterocyclic, unsaturated ring system which contains 2 or 3 hetero-atoms, at least one of which is a nitrogen atom, and can be fused with a benzene ring and which is substituted by at least one ballast group, R is a substituted or unsubstituted aryl radical, R1 is hydrogen, halogen, alkyl, alkoxy, halo- genoalkyl, alkylsulfonyl or aryloxy and X is a radical detachable during the coupling reaction. The magenta couplers show high reactivity (high maximum density), which facilitates accelerated processing of the photographic materials, and minimal fogging. The couplers also have good fastness to light.
335108
Ag Ciba-Geigy
Gowling Lafleur Henderson Llp
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