Aqueous soluble infrared antihalation dyes
AssigneeE. I. Du Pont de Nemours and Company
InventorsAlden D. West, Dietrich M. Fabricius
Life of this patent
Estimating the term…
Abstract
Sulfoalkyl substituted indolenine dyes that absorb infrared radiation and photosensitive elements containing said dyes are disclosed. These dyes are useful as antihalation dyes in infrared sensitive photographic elements which show dye low stain. These dyes are represented by the following structure: ##STR1## wherein X is F, Cl, or Br; R is a hydrocarbon moiety containing from two to about five carbon atoms; and Y is a cation. In a preferred embodiment X is Cl. In a more preferred embodiment R is --(CH.sub.2).sub.3 -- or --(CH.sub.2).sub.4 --.
Claims6
A dye, useful as an infrared antihalation dye in a photosensitive element, said dye being represented by the following structure:
- ##STR7## wherein X is F, Cl, or Br;
- R is a hydrocarbon moiety containing from two to five carbon atoms;
- and Y is a cation.
Dependencies are inferred from the claim text.