Pre-treatment liquid for liquid absorbing printing substrates

Abstract

Liquids for the pre-treatment of liquid absorbing substrates, in particular textiles or garments, in printing processes are disclosed, said liquids being based on water and/or a low molecular alcohol and including small amounts of an organic acid and/or other reagents to increase dye fixation as well as at least one corrosion inhibiting agent selected from a group containing quaternary ammonium salts, derivates thereof and their corresponding organically substituted amines, hydroxy substituted acetylenic components and derivates thereof, carboxylic, dicarboxylic and polycarboxylic acids, long-chain carboxylic, dicarboxylic and polycarboxylic acids and separated fractions and derivates thereof, sulfur containing heterocyclic compounds and derivates thereof, nitrogen containing heterocyclic compounds and derivates thereof, nitrite and nitrate salts of metal ions, organic nitrites and nitrates, organic nitrogen compounds and reductive nitrogen containing compounds. Preferably the concentration of the corrosion inhibiting agent is between 0.01 wt. % and 10 wt. % and the surface tension of the liquid between 15 mN/m and 70 mN/m.

1 . Liquid for the pre-treatment of liquid absorbing substrates, in particular textiles or garments, in printing processes, said liquid being based on water and/or a low molecular alcohol and including small amounts of an organic acid and/or other reagents to increase dye fixation,
 characterized in that   said liquid contains at least one corrosion inhibiting agent.   
     
     
         2 . Liquid according to  claim 1 , wherein the corrosion inhibiting agent is selected from a group containing quaternary ammonium salts, derivates thereof and their corresponding organically substituted amines, hydroxy substituted acetylenic components and derivates thereof, carboxylic, dicarboxylic and polycarboxylic acids, long-chain carboxylic, dicarboxylic and polycarboxylic acids and separated fractions and derivates thereof, sulfur containing heterocyclic compounds and derivates thereof, nitrogen containing heterocyclic compounds and derivates thereof, nitrite and nitrate salts of metal ions, organic nitrites and nitrates, organic nitrogen compounds, reductive nitrogen containing compounds, combinations and solutions thereof and the like. 
     
     
         3 . Liquid according to  claim 2 , wherein the corrosion inhibiting agent is soluble in protic solvents. 
     
     
         4 . Liquid according to  claim 3 , wherein the viscosity of the corrosion inhibiting agent or its solution is adjusted to be lower than 1500 mPas at 25° C., by mixing with water or alcohol at percentages of 0.01 wt. % to 25 wt. %. 
     
     
         5 . The method of  claim 4 , wherein the water or alcohol is a percentages of 0.1 wt. % to 3 wt. %. 
     
     
         6 . The method of  claim 4 , wherein the viscosity of the corrosion inhibiting agent or its solution is adjusted to be lower than 500 mPas at 25° C. 
     
     
         7 . The method of  claim 4 , wherein the viscosity of the corrosion inhibiting agent or its solution is adjusted to be lower than 200 mPas at 25° C. 
     
     
         8 . Liquid of  claim 1 , wherein the concentration of the corrosion inhibiting agent or its solution is between 0.01 wt. % and 10 wt. %. 
     
     
         9 . Liquid of  claim 1 , wherein the concentration of the corrosion inhibiting agent or its solution is between 0.05 wt. % and 5 wt. %. 
     
     
         10 . Liquid of  claim 1 , wherein the concentration of the corrosion inhibiting agent or its solution is between 0.1 wt. % and 1 wt. %. 
     
     
         11 . Liquid of  claim 1 , wherein the surface tension of the liquid is between 15 mN/m and 70 mN/m. 
     
     
         12 . Liquid of  claim 1 , wherein the surface tension of the liquid is between 17 mN/m and 50 mN/m. 
     
     
         13 . Liquid of  claim 1 , wherein the surface tension of the liquid is between 20 mN/m and 40 mN/m. 
     
     
         14 . Liquid according to  claim 1 , wherein the surface tension of the liquid is adjusted by addition of at least one surface-active agent. 
     
     
         15 . A method of using the liquid of  claim 1 , comprising applying the liquid to a substrate in a printing process. 
     
     
         16 . The method of  claim 15 , wherein the printing process is a wet-in-wet ink jet printing process. 
     
     
         17 . The method of  claim 15 , wherein the printing process is a direct-to-garment printing process. 
     
     
         18 . The method of  claim 16 , wherein the liquid is used as a priming fluid. 
     
     
         19 . The method of  claim 16 , wherein the liquid is applied to the printing substrate directly before the printing and preferably applied by spraying or rolling of the liquid onto the printing. 
     
     
         20 . The method of  claim 16 , wherein the application of the liquid to the printing substrate is done inside the printing machine.