Filter dyes for photographic elements
AssigneeEastman Kodak Company
InventorsDonald R. Diehl, Glenn M. Brown, Margaret J. Helber
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AssigneeEastman Kodak Company
InventorsDonald R. Diehl, Glenn M. Brown, Margaret J. Helber
Estimating the term…
Solid particle dispersions of dyes according to the formula: ##STR1## wherein D is selected from the group consisting of ##STR2## and ketomethylene nuclei are disclosed as filter dyes for photographic elements. In this formula, E.sup.1 and E.sup.2 are each independently electron withdrawing groups. R.sup.1 and R.sup.6 are each independently R or NHR, where R is aryl. R.sup.2 and R.sup.3 are each independently alkyl or aryl, or represent the carbon atoms necessary to form a fused ring with the phenyl ring to which the N atom is attached. R.sup.4 and R.sup.7 are each independently hydrogen, alkyl or aryl. R.sup.5 is alkyl. Z represents the atoms necessary to complete a 5 or 6 memebered heterocyclic nucleus. M.sup.+ is a cation. L.sup.1 through L.sup.7 are each independently methine groups. m is 0, 1, 2, or 3. n is 0 or 1. p is 0, 1, 2, 3, or 4. q is 0, 1, 2, or 3. At least one of R.sup.1 or D includes an aryl ring substituted with a carboxy or sulfonamido substituent.
A dye having the formula:
Dependencies are inferred from the claim text.