Coating composition for photographic materials

Abstract

A coating composition for use in a photographic element, the composition comprising an aqueous solution of: two or more surfactants; a hydrophilic binder; and optional matte particles; wherein one of the surfactants is represented by the following Formula (I): R f —CH 2 CH 2 —(B) y −A   (I) where R f is F(CF 2 CF 2 ) n — and n is 3 and 4 or 3, 4, and 5, and the fraction of all R f with n=3 is at least 40%; B is a divalent linking group; y is 0 or 1; and A is an anionic group with a counterion or an amphoteric group. A photographic element containing the coating composition is also disclosed.

What is claimed is:  
     
         1 . A coating composition for use in forming an overcoat layer in a photographic element, said composition comprising an aqueous solution of: 
 two or more surfactants;    a hydrophilic binder; and    matte particles;    wherein one of the surfactants is represented by the following Formula (I):    R f —CH 2 CH 2 —(B) y −A   (I)    where R f  is F(CF 2 CF 2 ) n — and n is 3 and 4 or 3, 4, and 5, and the fraction of all R f  with n=3 is at least 40%;    B is a divalent linking group;    y is 0 or 1; and    A is an anionic group with a counterion or an amphoteric group.    
     
     
         2 . The coating composition of  claim 1  where n is 3 in at least 60% of the R f  groups present.  
     
     
         3 . The coating composition of  claim 1  where n is 3 in at least 90% of the R f  groups present.  
     
     
         4 . The coating composition of  claim 1  wherein A in Formula I is anionic.  
     
     
         5 . The coating composition of  claim 1  wherein A in Formula I is amphoteric.  
     
     
         6 . The coating composition of  claim 1  further containing at least one surfactant, not represented by Formula I, that is selected from the group consisting of alkyl aryl polyether sulfates, alkyl aryl polyether sulfonates, alkyl sulfosuccinate esters, alkyl aryl polyglycidols, and alkyl polysaccharide ethers.  
     
     
         7 . The coating composition of  claim 1  further containing at least one surfactant, not represented by Formula I, that is selected from the group consisting of nonylphenoxy-poly(glycidol)(10) and alkyl mono- and oligo-glucopyranoside.  
     
     
         8 . The coating composition of  claim 1  further containing a lubricant.  
     
     
         9 . The coating composition of  claim 8  wherein the lubricant is a poly(dimethyl siloxane).  
     
     
         10 . The coating composition of  claim 1  wherein A is  + N(CH 3 )—CH 2 C(═O)O—.  
     
     
         11 . The coating composition of  claim 1  wherein the matte bead is a polymer comprising acrylic or vinyl aromatic monomers.  
     
     
         12 . The coating composition of  claim 1  wherein the binder is gelatin.  
     
     
         13 . A coating composition for use in a photographic element, said composition comprising an aqueous solution of: 
 two or more surfactants; and    a hydrophilic binder;    wherein one of the surfactants is represented by the following Formula (I):    R f —CH 2 CH 2 —(B) y −A   (I)    where R f  is F(CF 2 CF 2 ) n — and n is 3 and 4 or 3, 4, and 5, and the fraction of all R f  with n=3 is at least 40%;    B is a divalent linking group;    y is 0 or 1; and    A is an anionic group with a counterion or an amphoteric group.    
     
     
         14 . A photographic element comprising: 
 a) a support;    b) at least one image-forming layer; and    c) an overcoat layer comprising: 
 i) two or more surfactants;  
 ii) a hydrophilic binder; and  
 iii) matte particles;  
 wherein one of the surfactants is represented by the following Formula (I):  
 R f —CH 2 CH 2 —(B) y −A   (I)  
   where R f  is F(CF 2 CF 2 ) n — and n is 3 and 4 or 3, 4, and 5, and the fraction of all R f  with n=3 is at least 40%;    B is a divalent linking group;    y is 0 or 1; and    A is an anionic group with a counterion or an amphoteric group.    
     
     
         15 . The photographic element of  claim 14  wherein R f  is F(CF 2 CF 2 ) n — and n is 3 and 4 or 3, 4, and 5, and the fraction of all R f  with n=3 is at least 60%.  
     
     
         16 . A photographic element comprising: 
 a) a support;    b) at least one image-forming layer; and    c) an overcoat layer comprising: 
 i) two or more surfactants;  
 ii) a hydrophilic binder; and  
 iii) matte particles;  
 wherein one of the surfactants is represented by the following Formula II:  
 R f —CH 2 CH 2 −A   (II)  
   where R f  is F(CF 2 CF 2 ) n — and n is a mixture of 3, 4, and 5, and the fraction with n=3 is at least 40% of the total; and    A is an anionic group.    
     
     
         17 . The photographic element of  claim 16  wherein A is —SO 3 M, where M is a substituted ammonium cation.  
     
     
         18 . The photographic element of  claim 14 ,  15  or  16  further comprising a UV-absorbing compound.  
     
     
         19 . The photographic element of  claim 14  or  15  wherein the surfactant represented by Formula (I) in the overcoat layer is present in an amount between 0.1 and 25 milligrams per square meter.  
     
     
         20 . The photographic element of  claim 14  or  15  wherein the surfactant represented in Formula (I) in the outermost layer is present in an amount between 0.5 and 15 milligrams per square meter.  
     
     
         21 . A photographic element comprising: 
 a) a support;    b) at least one image-forming layer; and    c) at least two surfactants;    wherein one of the surfactants is represented by the following Formula (I):    R f —CH 2 CH 2 —(B) y −A   (I)    where R f  is F(CF 2 CF 2 ) n — and n is 3 and 4 or 3, 4, and 5, and the fraction of all R f  with n=3 is at least 40%;    B is a divalent linking group;    y is 0 or 1; and    A is an anionic group with a counterion or an amphoteric group.    
     
     
         22 . A method of providing control of static charge for a photographic element, the method comprising the steps of providing a photographic element, coating its outermost layer with a fluorinated surfactant coating composition and drying said coating, said coating composition comprising: 
 i) a mixture of two or more surfactants;    ii) a hydrophilic binder; and    iii) matte particles;    wherein one of the surfactants is represented by the following Formula (I):    R f —CH 2 CH 2 —(B) y −A   (I)    where R f  is F(CF 2 CF 2 ) n — and n is 3 and 4 or 3, 4, and 5, and the fraction of all R f  with n=3 is at least 40%;    B is a divalent linking group;    y is 0 or 1; and    A is an anionic group with a counterion or an amphoteric group.