Patents Represented by Law Firm Connolly & Holt
  • Patent number: 5731138
    Abstract: A color photographic material which contains in at least one layer a stabilizer of the formula (I) ##STR1## in which R.sub.1 means H, alkyl, aryl or acyl;R.sub.2 means --OR.sub.1, --COOH, alkyl, aryl, dialkylamino, acylamino, sulphonamido, acyl or sulphonyl;R.sub.3, R.sub.4, R.sub.5 and R.sub.6 independently of one another mean H, halogen or a residue as R.sub.2 or two adjacent residues --OR.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 may together complete a 5- to 8-membered ring, and a polymer insoluble in water as pH 5 and soluble at pH 11 with an acid value of 30 to 300 and a Tg of.ltoreq.40.degree. C. of the formula (II) ##STR2## in which R.sub.7 mutually independently mean hydrogen, C.sub.1 -C.sub.4 alkyl or CH.sub.2 --COOH,R.sub.8 means alkyl, aryl or aralkyla means 80 to 95 mol. % andb means 5 to 20 mol. %, is distinguished by improved stability of the image dyes.
    Type: Grant
    Filed: January 26, 1996
    Date of Patent: March 24, 1998
    Assignee: Agfa-Gevaert AG
    Inventors: Gunter Helling, Beate Weber, Markus Geiger