Photographic element containing organosilanes
AssigneeEastman Kodak Company
InventorChristopher P. Moore
Life of this patent
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Abstract
A photographic element comprising a support having thereon at least one silver halide emulsion layer having associated therewith a dye-forming coupler and an organosilane, nonhydrolyzable in an alkaline medium, wherein: (a) one or two aryloxy groups are attached to the silicon atom of the silane either directly or indirectly through an alkylene group or an alkyleneoxy group, and (b) each aryloxy group is attached directly or indirectly through a single linking group to an aryl group substituted with a hydroxy, hydroxyalkoxy, organosilyloxy, organosilylalkoxy or organosilyloxyalkoxy group. Use of the compounds provides an improvement in density and contrast.
Claims14
A photographic element comprising a support having thereon at least one silver halide emulsion layer having associated therewith a dye-forming coupler and an organosilane, nonhydrolyzable in an alkaline medium, wherein:
- (a) one or two aryloxy groups are attached to the silicon atom of the silane either directly or indirectly through an alkylene group or an alkyleneoxy group,
- (b) each said aryloxy group is attached directly or indirectly through a single linking group to an aryl group substituted with a hydroxy, hydroxyalkoxy, organosilyloxy, organosilyalkoxy or organosilyloxyalkoxy group, and
- (c) in the event that at least one of said aryloxy groups is directly attached to the silicon atom of said silane, then said silicon atom must also be substituted by at least one branched alkyl group, substituted cycloalkyl group or substituted aryl group.
A process of improving the density and contrast of a photographic dye image comprising processing a photographic element comprising a support having thereon at least one silver halide emulsion layer having associated therewith a dye-forming coupler in the presence of an organosilane, nonhydrolyzable in an alkaline medium, wherein:
- (a) one or two aryloxy groups are attached to the silicon atom of the silane either directly or indirectly through an alkylene group or an alkyleneoxy group,
- (b) each said aryloxy group is attached directly or indirectly through a single linking group to an aryl group substituted with a hydroxy, hydroxyalkoxy, organosilyloxy, organosilylalkoxy or organosilyloxyalkoxy group, and
- (c) in the event that at least one of said aryloxy groups is directly attached to the silicon atom of said silane, then said silicon atom must also be substituted by at least one branched alkyl group, substituted cycloalkyl group or substituted aryl group.
Dependencies are inferred from the claim text.