Substituted sulfonamido compounds, photosensitive elements, film units, and processes for retaining a photographic image with same
US4258120A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 24, 1979 |
| Grant date | Mar 24, 1981 |
| Priority date | — |
| Expiry date | Apr 24, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/30511
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A nondiffusible sulfonamido compound which is alkali-cleavable upon oxidation to release a diffusible photographically useful material, said nondiffusible sulfonamido compound having the formula: ##STR1## wherein: (a) R.sup.1 is alkyl, aryl sulfamyl, carbamyl, carbonamido, carbonyl, carbonyloxy or sulfonamido; PA1 (b) R.sup.2 is alkyl having from 1 to 18 carbon atoms, aryl, or alkylphenyl having from 7 to 12 carbon atoms; PA1 (c) R.sup.3 and R.sup.4 are independently alkyl, or aryl, or R.sup.3 and R.sup.4, taken together, form a fused carbocyclic or heterocyclic ring; PA1 (d) NHSO.sub.2 PUG represents a sulfonamido group; PA1 (e) PUG represents a photographically useful group; and PA1 (f) at least one of R.sup.1, R.sup.2, R.sup.3, or R.sup.4, or any combination thereof, provides a molecular configuration of such size or shape as to render the compound nondiffusible under alkaline processing conditions, is useful as a redox releaser in photosensitive elements, photographic film units and in processes for transferring and/or retaining a photographic image in color diffusion transfer units. These elements, film units and processes produce retained color images having substantially red…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.