Photographic elements containing polymers having aminoallylidenemalononitrile units
AssigneeMinnesota Mining and Manufacturing Company
InventorsPaolo Beretta, Angelo Vallarino
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Abstract
The present invention refers to a photographic material including in one of its layers a polymeric product having an aminoallylidenemalononitrile ultraviolet absorber unit which can be introduced into a photographic layer by aqueous solutions, with the method according to this invention, of including said aminoallylidenemalononitrile unit in an allyl monomer and then copolymerizing it with an ethylenically unsaturated monomer in order to obtain said polymeric product to be added to the layer forming composition. This invention is of particular industrial interest in the field of color photographic materials.
Claims8
A photographic material comprising at least one silver halide emulsion layer and at least one auxiliary layer on a supporting base, characterized by having at least one of said layers containing a polymer having an ultraviolet radiation absorbing aminoallylidenemalononitrile group.
A photographic material according to claim (1), in which said auxiliary layer contains said polymer.
A photographic material according to claim (1), wherein said auxiliary layer is an external protective layer.
A photographic material according to claim (1), wherein said emulsion layer and said auxiliary layer are comprised of gelatin.
A photographic material according to claim (1), wherein said silver halide emulsion layer is optically sensitized.
A photographic material according to claim (1), wherein said silver halide emulsion layer has photographic couplers therein.
A photographic material according to claim (1), wherein said ultraviolet absorber aminoallylidenemalonoitrile group is included in a polymeric compound, which is the reaction product of 3-diallylaminoallylidenemalononitrile and an ethylenically unsaturated monomer.
A photographic material according to claim (1), wherein said ultraviolet absorber aminoallylidenemalononitrile group is included in a polymeric compound which is the reaction product of 3-diallylaminoallylidenemalononitrile and an acrylic monomer.
Dependencies are inferred from the claim text.