# US 5,043,255 A · Color photographic material with polyester oil former

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- Number: US 5,043,255 A
- Document ID: US5043255A
- Status: Granted
- Kind: A
- Application number: 07/415,098
- Filed: 1989-09-29
- Granted: 1991-08-27
- Earliest claimed: 1988-10-15
- Assignees: Agfa NV
- Inventors: Gunter Junkers; Klaus Wagner; Gerald Karich; Friedhelm Sommer
- Web page: https://patentgrep.com/patent/US5043255A

## CPC

- G03C 7/30535: {having the coupling site not in rings of cyclic compounds}
- G03C 7/3882: {characterised by the use of a specific polymer or latex}
- G03C: PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES (for photomechanical purposes G03F); PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY (photographic processes characterised by the use or manipulation of apparatus classifiable per se in subclass G03B, see G03B; photomechanical production of textured or patterned surfaces G03F; electrophotography, magnetography G03G)

## Abstract

A color photographic recording material comprising a support and at least one photosensitive silver halide emulsion layer, with which a yellow coupler of the pivaloyl or benzoyl acetanilide type dissolved in a polymeric ester of aromatic or aliphatic dicarboxylic acids is associated, is distinguished by greater color purity and better dark-fading stability.

## Claims

### Claim 1

A color reversal photographic for exposure and development by reversal color development comprising a support and at least one photosensitive silver halide emulsion layer with which a yellow coupler dissolved in an oil former is associated, characterized in that the yellow coupler corresponds to the following formula
in which
R.sub.1 represents tert.-butyl or optionally substituted phenyl,
R.sub.2 represents hydrogen or a releasable group,
R.sub.3 represents hydrogen, alkoxy or halogen,
R.sub.4 represents hydrogen, alkoxy or dialkylaminosulfonyl and
R.sub.5 represents hydrogen, alkoxy or a ballast group,
the coupler molecule containing at least one ballast group, and in that the oil former consists essentially of a polymeric ester of aromatic dicarboxylic acid.

### Claim 2 (depends on 1)

A color reversal photographic recording material as claimed in claim 1, characterized in that the oil former has a viscosity of 50 to 5,000 mPa.s.

### Claim 3 (depends on 1)

A color reversal photographic recording material as claimed in claim 1, characterized in that the ratio by weight of coupler to oil former is 1:0.1-2.

### Claim 4 (depends on 1)

A color photographic recording material as claimed in claim 1, characterized in that a polymeric phthalic acid ester is used as the oil former.