Solid Or Phase Change Inks With Improved Properties

Abstract

A solid or phase change inkjet ink incorporating a polar acidic wax is described. The use of polar waxes as an ink additive improves the polarity of the ink and adhesion of the ink to paper. A method for applying the solid or phase change ink incorporating an acidic polar wax additive to form an image is also described.

1 . A composition comprising:
 at least one polar wax having at least one acidic group, wherein the polar wax has a melting temperature of from about 60° C. to about 100° C.;   stearyl stearamide;   ethylene bis-oleamide; and   a Fischer-Tropsch wax;   wherein the composition is a solid ink composition.   
     
     
         2 . The composition of  claim 1 , wherein the at least one polar wax comprises carnauba wax. 
     
     
         3 . The composition of  claim 1 , wherein the polar wax has an acid number of greater than 0 to about 95 mgKOH/g. 
     
     
         4 . The composition of  claim 1 , wherein the polar wax has an acid number of greater than 0 to about 160 mgKOH/g. 
     
     
         5 . The composition of  claim 1 , wherein the melting temperature of the polar wax is from about 70° C. to about 90° C. 
     
     
         6 . The composition of  claim 1 , wherein the polar wax is present in an amount of about 5.0 to about 90 weight % by weight of the ink. 
     
     
         7 . The ink composition of  claim 1 , where the polar wax is present in the ink composition in an amount of at least 5% by weight or more. 
     
     
         8 . The composition of  claim 1 , further comprising a colorant selected from the group consisting of a pigment, a dye, mixtures of pigment and dye, mixtures of pigments, mixtures of dyes. 
     
     
         9 . The composition of  claim 1 , further comprising at least one solvent dye colorant. 
     
     
         10 . The composition of  claim 1 , further comprising a solvent dye colorant,
 wherein the polar wax is present in an amount of about 5 to about 90 percent by weight, based upon the total weight of the ink;   wherein the solvent dye colorant is present in an amount of about 0.1 to about 15 percent by weight, based upon the total weight of the ink.   wherein the ink composition comprises an ink vehicle comprising the Fischer-Tropsch wax, the stearyl stearamide, and the ethylene-bis-oleamide, wherein the ink vehicle is present in an amount of from about 20 to about 99.5 percent weight, based upon the total weight of the ink.   
     
     
         11 . The composition of  claim 1 , further comprising a solvent dye colorant,
 wherein the polar wax comprises carnauba wax and wherein the polar wax is present in an amount of about 5 to about 90 percent by weight, based upon the total weight of the ink;   wherein the solvent dye colorant is present in an amount of about 0.1 to about 15 percent by weight, based upon the total weight of the ink.   wherein the ink composition comprises an ink vehicle comprising the Fischer-Tropsch wax, the stearyl stearamide, and the ethylene-bis-oleamide, wherein the ink vehicle is present in an amount of from about 20 to about 99.5 percent weight, based upon the total weight of the ink.   
     
     
         12 . The composition of  claim 1 , further comprising at least one antioxidant. 
     
     
         13 . The composition of  claim 1 , wherein an onset of crystallization temperature of the ink composition is about 88° C. or more. 
     
     
         14 . A composition comprising:
 at least one polar wax having at least one acidic group, wherein the polar wax has a melting temperature of from about 60° C. to about 100° C.;   at least one fatty amide that comprises both stearyl stearamide and ethylene bis-oleamide; and   a Fischer-Tropsch wax;   wherein the composition is a solid ink composition.   
     
     
         15 . The composition of  claim 14 , wherein the at least one polar wax comprises carnauba wax. 
     
     
         16 . The composition of  claim 14 , wherein the polar wax is present in an amount of about 5.0 to about 90 weight % by weight of the ink. 
     
     
         17 . The composition of  claim 14 , further comprising a solvent dye colorant,
 wherein the polar wax is present in an amount of about 5 to about 90 percent by weight, based upon the total weight of the ink;   wherein the solvent dye colorant is present in an amount of about 0.1 to about 15 percent by weight, based upon the total weight of the ink;   wherein the ink composition comprises an ink vehicle comprising the at least one fatty amide that comprises both stearyl stearamide and ethylene bis-oleamide and the Fischer-Tropsch wax, wherein the ink vehicle is present in an amount of from about 20 to about 99.5 percent weight, based upon the total weight of the ink.   
     
     
         18 . The composition of  claim 14 , further comprising a solvent dye colorant,
 wherein the polar wax comprises carnauba wax and wherein the polar wax is present in an amount of about 5 to about 90 percent by weight, based upon the total weight of the ink;   wherein the solvent dye colorant is present in an amount of about 0.1 to about 15 percent by weight, based upon the total weight of the ink;   wherein the ink composition comprises an ink vehicle comprising the at least one fatty amide that comprises both stearyl stearamide and ethylene bis-oleamide and the Fischer-Tropsch wax, and wherein the ink vehicle is present in an amount of from about 20 to about 99.5 percent weight, based upon the total weight of the ink.   
     
     
         19 . The composition of  claim 14 , wherein an onset of crystallization temperature of the ink composition is about 88° C. or more. 
     
     
         20 . A composition comprising:
 carnauba wax;   stearyl stearamide;   ethylene bis-oleamide; and   a Fischer-Tropsch wax;   wherein the composition is a solid ink composition.