Color photographic material containing a hydroxyindane
AssigneeAgfa-Gevaert
InventorsJohannes Sobel, Alfons Klein, Fritz Nittel, Karlfried Wedemeyer
Life of this patent
Estimating the term…
Abstract
A color photographic recording material is provided containing at least one dye image or a color coupler for the production of a dye image and the material contains in at least one hydrophilic layer a hydroxyindane as defined hereinafter to reduce the fading of the image dye on exposure to UV or visible light.
Claims3
A light sensitive color photographic material capable of providing dye images upon exposure and development in a conventional liquid color developer and having improved resistance to bleaching of the dye image containing a silver halide emulsion and at least one hydrophilic binder layer containing a color coupler for the production of a dye image and in said binder layer in an amount to effectively reduce the bleaching of the produced dye image a hydroxy indane of the following formula:
- in which
- R.sup.1 = hydrogen, alkyl, cycloalkyl, aralkyl or a further hydroxy indane radical bonded by --S--, --SO.sub.2 --, --O--, or a straight or branched chain alkylene bridge, of the formula:
- ##STR18## R.sup.2 &R.sup.3 = hydrogen, halogen, --NO.sub.2, carboxyl, alkyl, cycloalkyl, aralkyl, aryl, where the stated alkyl, cycloalkyl, aralkyl and aryl groups can contain further substituents;
- R.sub.2 and R.sub.3 together can represent the radical necessary for completing a condensed carbocyclic ring;
- R.sup.4 &r.sup.5 = hydrogen, alkyl, cycloalkyl, aryl, or R.sup.4 and R.sup.5 together can represent the radical necessary for completing a 5- or 6-membered cycloaliphatic ring;
- R.sup.6 and R.sup.7 = hydrogen, alkyl, cycloalkyl, aralkyl or phenyl;
- R.sup.6 and R.sup.7 together can represent the radical necessary for completing a 5- or 6-membered cycloaliphatic ring;
- R.sup.8 and R.sup.9 = as R.sup.6 and R.sup.7 ;
- when R.sup.8 and R.sup.9 together represent the radical necessary for completing a 5- or 6-membered carbocyclic ring which may contain an annulated ring, this radical when annulated can contain a hydroxyl subtituted benzo ring, capable of forming a dihydroxyspiro-bis-indane.
Dependencies are inferred from the claim text.