Filter dyes for rapid processing applications
AssigneeAGFA-Gevaert, N.R.
InventorsEric Kiekens, Paul Callant
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Abstract
The synthesis and the application of new dyes is described, said new dyes being incorporated in non-migratory state in hydrophilic colloid layers of photographic materials wherefrom they can be rapidly removed after being quickly decolorized in alkaline aqueous liquids used in the processing of said materials. The filter dyes have an amide function or a derivative therefrom as a substituent at the mono- or trimethine chain.
Claims10
A photographic material comprising a support and at least one light-sensitive silver halide emulsion layer characterized in that it comprises in a hydrophilic colloid layer at least one filter dye corresponding to the following general formula (I):
- ##STR8## wherein n represents 0 or 1;
- p represents 0, 1 or 2;
- Q represents the atoms necessary to form an acidic nucleus
- R.sub.1 represents hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, COOR.sub.2,NHCOR.sub.3 or NHSO.sub.2 R.sub.4 with R.sub.2 representing hydrogen or substituted or unsubstituted alkyl, R.sub.3 and R.sub.4 representing substituted or unsubstituted alkyl, or substituted or unsubstituted aryl,
- X represents OR.sub.5, SR.sub.5 or NR.sub.6 R.sub.7, wherein
- R.sub.5 represents H, substituted or unsubstituted alkyl, substituted or unsubstituted aryl and
- each of R.sub.6 and R.sub.7 which may be the same or different represents hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted aryl or the necessary atoms, to form a ring together with the N-atom to which they are attached and the C-atom of the phenylene ring in ortho position with respect to said N-atom;
- R.sub.6 and R.sub.7 together represent the necessary atoms to form a ring with the N-atom to which they are attached;
- L.sub.1, L.sub.2, L.sub.3 represent substituted or unsubstituted methine with the proviso that at least one of L.sub.1, L.sub.2 or L.sub.3 must be substituted by --CONR.sub.8 R.sub.9 ;
- R.sub.8 and R.sub.9 which may be the same or different represent hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, NH.sub.2, NHR.sub.10, NR.sub.11 R.sub.12 with R.sub.10, R.sub.11 and R.sub.12 representing a substituted or unsubstituted alkyl, or a substituted or unsubstituted aryl and wherein at least one of R.sub.1 to R.sub.12 contains an ionizable group.
Dependencies are inferred from the claim text.