Detectable markers in cationic polymeric fixers

Abstract

A cationic polymeric fixer material comprising cationic polymers and at least one marker composition soluble in the fixer material and detectable under either ultraviolet or near IR light; as well as a method of inkjet printing using said fixer material and a method of detecting cationic polymeric fixer material on a printed media using said fixer material.

1 - 7 . (canceled)  
   
   
       8 . A cationic polymeric fixer material comprising cationic polymers and at least one marker composition soluble in the fixer material and detectable under either ultraviolet or near IR light.  
   
   
       9 . The cationic polymeric fixer material of  claim 8  wherein the marker composition is selected from the group consisting of 1,1′,3,3,3′,3′-Hexamethylindodicarbocyanine iodide (dicarbocyanine); 1,1′,3,3,3′3′-Hexamethylindotricarbocyanine iodide (tricarbocyanine); Basic Violet 16; 4-amino-benzoic acid (PABA); 4,4′-Diaminostilbene dihydrochloride (diaminostilbene); Victoria Blue BO; 7-amino-4-methyl coumarin; 7-diethylamino-4-methyl coumarin (DAMC);  3 -[2-(diethylamino)ethyl]-7-hydroxy-4-methylcoumarin hydrochloride; and Carbostyril 124.  
   
   
       10 . The cationic polymeric fixer material of  claim 8  wherein the cationic polymers are selected from the group consisting of polyguanadines and polyethyleneimines.  
   
   
       11 . The cationic polymeric fixer material of  claim 10  wherein the cationic polymers comprise polymonoguanadines.  
   
   
       12 . The cationic polymeric fixer material of  claim 11  wherein the polymonoguanadines are poly (C3-18-hydrocarbyl monoguanidines).  
   
   
       13 . The cationic polymeric fixer material of  claim 12  wherein the poly(C3-18-hydrocarbyl monoguanidine) comprises groups selected from the group consisting of Formula (1) and Formula (2) or salts thereof:  
     
       
         
         
             
             
         
       
     
     wherein: 
 each m is independently 0 or 1; 
 each Y is independently a C2-18-hydrocarbyl group;  
 
 A and B are hydrocarbyl groups which together comprise a total of 3 to 18 carbon atoms; and  
 each R is independently hydrogen, alkyl, alkoxy, substituted alkyl or substituted alkoxy.  
 
   
   
       14 . The cationic polymeric fixer material of  claim 12  wherein the poly(C3-18-hydrocarbyl monoguanidine) comprises at least one group of Formula (3) or salts thereof:  
     
       
         
         
             
             
         
       
     
     wherein: 
 n is from 2 to 50.  
 
   
   
       15 . A method of inkjet printing on a media substrate, comprising: 
 a) inkjet printing an ink comprising an anionic colorant onto the media substrate;    b) either underprinting before step a) or overprinting after step a) a cationic polymeric fixer material onto the media substrate;    wherein said cationic polymeric fixer material comprises cationic polymers and at least one marker composition soluble in the fixer material and detectable under either ultraviolet or near IR light.    
   
   
       16 . The method of  claim 15  wherein the at least one marker composition is selected from the group consisting of 1,1′,3,3,3′,3′-Hexamethylindodicarbocyanine iodide (dicarbocyanine); 1,1′,3,3,3′3′-Hexamethylindotricarbocyanine iodide (tricarbocyanine); Basic Violet 16; aminostilbene4-amino-benzoic acid (PABA); 4,4′-Diaminostilbene dihydrochloride (diaminostilbene); 7-amino-4-methyl coumarin (AMC); 7-diethylamino-4-methyl coumarin (DAMC); and Carbostyril 124.  
   
   
       17 . The method of  claim 15  wherein the cationic polymers are selected from the group consisting of polyguanadines and polyethyleneimines.  
   
   
       18 . The method of  claim 17  wherein the cationic polymers comprise polymonoguanadines.  
   
   
       19 . The method of  claim 18  wherein the polymonoguanadines are poly (C3-18-hydrocarbyl monoguanidines).  
   
   
       20 . The method of  claim 19  wherein the poly(C3-18-hydrocarbyl monoguanidine) comprises groups selected from the group consisting of Formula (1) and Formula (2) or salts thereof:  
     
       
         
         
             
             
         
       
     
     wherein: 
 each m is independently 0 or 1; 
 each Y is independently a C2-18-hydrocarbyl group;  
 
 A and B are hydrocarbyl groups which together comprise a total of 3 to 18 carbon atoms; and  
 each R is independently hydrogen, alkyl, alkoxy, substituted alkyl or substituted alkoxy.  
 
   
   
       21 . The method of  claim 19  wherein the poly(C3-18-hydrocarbyl monoguanidine) comprises at least one group of Formula (3) or salts thereof: