Photographic layers containing perfluoro compounds and coating thereof

Abstract

Acrylic polymer layers and colloidal silver halide photographic emulsions are coated to form layers without repellent spots from solutions containing a perfluoro compound .[.containing an intralinear carbonyl or sulfonyl group selected from the group: (1) perfluorocarbon compounds derived from perfluorocarboxylic acids having the general structure ##STR1## where C f is a fully fluorinated (perfluoro) saturated chain consisting of five or more carbon atoms which may or may not be an oxygen-interrupted carbon chain; X=OY or an amino group, where Y is H, alkali metal or an ammonium group, and (2) perfluoro compounds.]. derived from perfluorosulfonic and perfluorosulfuric acids having the general structure (C.sub.f).[..sub.x .]. (C.sub.H).sub.y (X)(Z) where C f is a fully fluorinated .Iadd.(perfluoro) saturated .Iaddend.carbon chain .[.as defined in paragraph (1).]. .Iadd.having six or more carbon atoms which may or may not be an oxygen-interrupted carbon chain.Iaddend.; C H is the saturated hydrocarbon portion of the same carbon chain; X is SO 2 or SO 3 ; Z is an amino or hydroxyl group, alkali metal or an ammonium group; .[.x=6 or greater; y=2 or more..]. .Iadd.y=0 or more. .Iaddend.

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows: 
     
       1. A coated photographic element comprising a support bearing a hydrophobic polymer layer carrying a macro-molecular water-permeable organic colloid layer characterized by containing a perfluorocarbon compound .[.having an intralinear carbonyl or sulfonyl group and.]. capable of reducing the surface tension of water to 15-20 dynes per .[.square.]. centimeter, said perfluoro compound being .[.selected from the group: (1) perfluorocompounds derived from perfluorocaboxylic acids having the general structure ##STR10## where C f  is a fully fluorinated (perfluoro) saturated chain consisting of five or more carbon atoms which may or may not be an oxygen-interrupted carbon chain; X=OY or an amino group, where Y is H, alkali metal or an ammonium group, and   (2) perfluoro compounds.]. derived from perfluorosulfonic and perfluorosulfuric acids having the general structure   (C.sub.f).[..sub.x .].(C.sub.H).sub.y (X)(Z)     where C f  is a fully fluorinated .Iadd.(perfluoro) saturated .Iaddend.carbon chain .[.as defined in paragraph (1).]. .Iadd.having six or more carbon atoms which may or may not be an oxygen-interrupted carbon chain.Iaddend.; C H  is the saturated hydrocarbon portion of the same chain; X is SO 2  or SO 3  ; Z is an amino or hydroxyl group, alkali metal or an ammonium group; .[.x=6 or greater; Y=2 or more; .]. .Iadd.y=0 or more; .Iaddend.said element having radiation-sensitive silver halide in intimate association with said colloid layer.     
     
     
       2. A photographic element according to claim 1 having a water-permeable organic colloid layer containing radiation-sensitive silver halide on the layer containing the perfluorocarbon compound. 
     
     
       3. An element according to claim 1, wherein said support is a polyethylene terephthalate film having an anchoring substratum of a vinylidene chloride addition copolymer of at least 35% vinylidene chloride. 
     
     
       4. An element according to claim 1, wherein said colloid is an acrylic copolymer. 
     
     
       5. A process for reducing repellency spots in a photographic element which comprises coating a hydrophobic polymer surface of a support for the element with an aqueous macromolecular organic dispersion containing about 0.10 to about 2.0 grams per liter of aqueous composition of a perfluorocarbon compound characterized by containing a perfluorocarbon compound .[.having an intralinear carbonyl or sulfonyl group and.]. capable of reducing the surface tension of water to 15-20 dynes per .[.square.]. centimeter, said perfluoro compound being .[.selected from the group: (1) perfluoro compounds derived from perfluorocarboxylic acids having the general structure ##STR11## where C f  is a fully fluorinated (perfluoro) saturated chain consisting of five or more carbon atoms which may or may not be an oxygen-interrupted carbon chain; X=OY or an amino group, where Y is H, alkali metal or an ammonium group, and   (2) perfluoro compounds.]. derived from perfluorosulfonic and perfluorosulfuric acids having the general structure   (C.sub.f).[..sub.x .].(C.sub.H).sub.y (X)(Z)     where C f  is a fully fluorinated .[.carbon chain as defined in paragraph (1).]. .Iadd.(perfluoro) saturated carbon chain having six or more carbon atoms which may or may not be an oxygen-interrupted carbon chain.Iaddend.; C H  is the saturated hydrocarbon portion of the same carbon chain; X is SO 2  or SO 3  ; Z is an amino or hydroxyl group, alkali metal or an ammonium group; .[.x=6 or greater;.]. y=.[.2.]..Iadd.0 .Iaddend.or more.     
     
     
       6. A process according to claim 5, wherein said dispersion is a dispersion containing an acrylic copolymer. 
     
     
       7. A process according to claim 5, wherein said aqueous dispersion is a gelatin-containing dispersion. 
     
     
       8. A process according to claim 5, wherein said aqueous dispersion is a gelatino-silver halide dispersion. .Iadd. 9. A process according to claim 5 wherein said perfluoro compound is the potassium salt of N-ethyl, N-perfluorooctanesulfonyl glycine. .Iaddend..Iadd. 10. An element according to claim 1 wherein said perfluoro compound is the potassium salt of N-ethyl, N-perfluorooctanesulfonyl glycine. .Iaddend..Iadd. 11. An element according to claim 1 wherein said colloid is gelatin. .Iaddend..Iadd. 12. Photographic material which comprises at least one gelatine-containing layer that contains as a wetting agent a water-soluble surface active, aliphatic perfluorosulfonic acid derivative of the formula ##STR12## in which C f  is a perfluorinated alkyl group containing 6 or more carbon atoms, R 1  is methylene,   R 2  is ethyl and   
     
     
       X is an alkali metal atom. .Iaddend..Iadd. 13.  Photographic material as claimed in claim 12, wherein the perfluoro compound corresponds to the formula ##STR13## 
     
     
        .Iadd. 14.  Photographic material which comprises at least one gelatin-containing layer that contains as a wetting agent a water-soluble surface active, aliphatic perfluorosulfonic acid derivative of the formula   C.sub.f -- SO.sub.2 -- Z     in which   C f  is a perfluorinated alkyl group having six or more carbon atoms, and   Z is an amino group. .Iaddend.  pg,10 .Iadd. 15. Photographic material which comprises at least one macromolecular water-permeable organic colloid-containing layer that contains as a wetting agent a water-soluble surface active, aliphatic perfluorosulfonic acid derivative of the formula ##STR14## in which C f  is a fully fluorinated (perfluoro) saturated carbon chain containing 6 or more carbon atoms   R 1  is methylene   R 2  is ethyl and   
     
     
       X is an alkali metal atom. .Iaddend. .Iadd.16.  Photographic material as claimed in claim 15 wherein the perfluoro compound corresponds to the formula ##STR15##