Nondiffusible photographic couplers and photographic elements and processes employing same
AssigneeEastman Kodak Company
InventorGregory J. Lestina
Life of this patent
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Abstract
Photographic couplers comprising a coupler moiety and a ballast moiety have advantageous properties when the ballast moiety is terminated with a hydroxyphenylsulfonyl or hydroxyphenylsulfinyl group. The couplers are useful in photographic emulsions and element.
Claims13
A photographic element comprising a support, a photographic silver halide emulsion and a photographic coupler comprising a coupler moiety and a ballast moiety, the ballast moiety being terminated with a hydroxyphenylsulfonyl group or a hydroxyphenylsulfinyl group.
A photographic element comprising a support, a photographic silver halide emulsion and a photographic coupler wherein the coupler has the structural formula:
- ##STR82## where:
- COUP represents a coupler moiety;
- l, m and n are each individually 0 or 1;
- L.sup.1 represents a bivalent group selected from ##STR83## L.sup.2 represents a bivalent group selected from ##STR84## L.sup.3 represents a bivalent group selected from ##STR85## R.sup.1 and R.sup.3 are each individually hydrogen, alkyl of 1 to 10 carbon atoms or aryl of 6 to 20 carbon atoms;
- R.sup.2 is hydrogen or one or more halogen, alkyl or alkoxy substituents;
- X is --O-- or --S--;
- ##STR86## r is 0 or 1;
- and s is 0 to 10.
Dependencies are inferred from the claim text.