Photographic recording material containing a hydroquinone diether compound

US5362615A · kind A · utility

Assignee

• Agfa NV · BE

Inventors

• Jorg Hagemann · Neunburg vorm Wald, DE
• Ralf Weimann · Leverkusen, DE
• Erich Wolff · Solingen, DE
• Johannes Sobel · Leverkusen, DE

Key dates

• Filing date: Aug 20, 1993
• Grant date: Nov 8, 1994
• Expiry date: Aug 20, 2013

Classification

• Technology area (CPC G): Physics
• CPC primary: G03C7/39232
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A color-photographic recording material comprising at least one red-sensitive silver halide emulsion layer associated with a cyan coupler, at least one green-sensitive silver halide emulsion layer associated with a magenta coupler, and at least one blue-sensitive silver halide emulsion layer associated with a yellow coupler, at least one layer of the material containing a hydroquinone diether compound having the following formula I and optionally at least one compound having one of the formulae II, III, IV, V, SA and SB given in the description, characterized by increased light stability of the image colorants produced during chromogenic development, ##STR1## In the formula: R.sup.1 denotes alkyl, cycloalkyl or aryl; PA1 R.sup.2 denotes H, alkyl; PA1 R.sup.3, R.sup.4 denote H, alkyl, cycloalkyl, aryl, halogen, alkoxy, aroxy, acyloxy, alkylthio, arylthio, acyl, sulphonyl, sulphamoyl, acylamino, sulphonylamino, nitro; PA1 R.sup.5 denotes H, acyl, alkyl; PA1 X denotes --O-- or --NR.sup.6 --; PA1 R.sup.6 denotes H or alkyl, and PA1 n denotes O or an integer from 1 to 3.