Photographic material comprising a quinoxaline as dye bleaching catalyst

Abstract

Abstract A PHOTOGRAPHIC LIGHT-SENSITIVE MATERIAL FOR THE SILVER DYE BLEACH PROCESS, WHICH COMPRISES ON A CARRIER, IN AT LEAST ONE LAYER AS DYE BLEACHING CATALYST A QUINOXALINE OF THE FORMULA 2-((A)(7-N)-X-CH2-),3-((A'')(7-N'')-X''-CH2-),D,E-QUINOXALINE WHERE D IS OXYGEN, HALOGEN -N(-R1)-R2 OR-O-R3 E HYDROGEN, NITRO,-O-R4 OR-COO-R4, R1 AND R2 EACH REPRESENTING HYDROGEN, ACYL OR LOWER ALKYL AND R3 AND R4 EACH REPRESENTING HYDROGEN OR LOWER ALKYL, OR WHEREIN D AND E IN VICINAL POSITION FORM TOGETHER A RESIDUE OF FORMULA -O-(CH2)M-O-, WHEREIN M IS 1 OR 2,X AND X'' EACH REPRESENT ONE ATOM OF AN ELEMENT OF THE 4TH TO 7TH MAIN GROUP OF THE PERIODIC SYSTEM A AND A'' EACH REPRESENT HYDROGEN OR AN ORGANIC RESIDUE, AND N AND N'' EACH REPRESENT THE GROUP NUMBER OF THE ATOM X OR X'', SO THAT IN SO FAR AS N OR N'' IS 4 OR 5 THE INDIVIDUAL RESIDUES A OR A'' ARE THE SAME OR DIFFERENT AS WELL AS NEW QUINOXALINES OF FORMULA 1 WHEREIN IN CASE X IS OXYGEN OR HALOGEN, ONE OF D AND E IS DIFFERENT FROM HYDROGEN ARE DISCLOSED.

Inventors

• 👤 H Schlunke
• 👤 C Egli

Bibliographic Details