Discharge printing agent, container, ink-jet recording apparatus, method for discharge printing, method for forming image, and method for stabilizing discharge printing agent

Abstract

The present invention provides a discharge printing agent containing thiourea dioxide, wherein the discharge printing agent further contains at least one of the following components (i) and (ii): (i) at least one salt selected from the group consisting of a salt of monocarboxylic acid, a salt of ascorbic acid, and a salt of metasilicic acid; and (ii) β-diketone.

1 - 19 . (canceled) 
     
     
         20 . A dye discharge agent comprising thiourea dioxide, wherein
 the dye discharge agent further comprises at least one of the following components (i) and (ii):   (i) at least one salt selected from the group consisting of a salt of monocarboxylic acid, a salt of ascorbic acid, and a salt of metasilicic acid; and   (ii) β-diketone.   
     
     
         21 . The dye discharge agent according to  claim 20 , wherein
 the dye discharge agent further comprises a high boiling point solvent.   
     
     
         22 . The dye discharge agent according to  claim 21 , wherein
 the high boiling point solvent has a boiling point equal to or higher than 160° C., which is a temperature during a heat treatment in a discharge printing treatment using the dye discharge agent.   
     
     
         23 . The dye discharge agent according to  claim 22 , wherein
 the high boiling point solvent is at least one of glycerin and diethylene glycol.   
     
     
         24 . The dye discharge agent according to  claim 20 , wherein
 the dye discharge agent further comprises a viscosity modifier.   
     
     
         25 . The dye discharge agent according to  claim 24 , wherein
 the viscosity modifier is polyvinyl alcohol with a molecular weight of 500.   
     
     
         26 . The dye discharge agent according to  claim 20 , wherein
 the salt of monocarboxylic acid is at least one of a salt of formic acid, a salt of aliphatic carboxylic acid, and a salt of an aliphatic carboxylic acid derivative.   
     
     
         27 . The dye discharge agent according to  claim 26 , wherein
 the salt of aliphatic carboxylic acid is at least one of a salt of acetic acid and a salt of butyric acid.   
     
     
         28 . The dye discharge-agent according to  claim 20 , wherein
 the β-diketone is at least one selected from the group consisting of acetylacetone, disodium malonate, 3-acetyl-γ-butyrolactone, dehydroacetic acid, methyl acetoacetate, and N-methyl acetoacetic acid amide.   
     
     
         29 . The dye discharge agent according to  claim 20 , wherein
 the dye discharge agent comprises both of the components (i) and (ii).   
     
     
         30 . The dye discharge agent according to  claim 20 , wherein
 the dye discharge agent comprises at least one of the components (i) and (ii) and further comprises the following component (iii):   (iii) an amine base.   
     
     
         31 . The dye discharge agent according to  claim 30 , wherein
 the component (iii) is a primary amine base.   
     
     
         32 . The dye discharge agent according to  claim 31 , wherein
 the component (iii) is 2-amino-2-hydroxymethyl-1,3-propanediol (AHP).   
     
     
         33 . The dye discharge agent according to  claim 20 , wherein
 the amount of the thiourea dioxide to be added is 0.5 wt % to 5 wt % relative to the total amount of the dye discharge agent, and   the amount of at least one of the components (i) and (ii) to be added is 1 wt % to 15 wt % relative to the total amount of the dye discharge agent.   
     
     
         34 . A method for discharge printing of fabric containing a dye, the method comprising:
 a dye discharge agent-applying step of applying a dye discharge agent to fabric; and   a heating step of heating a dye discharge agent-applied part at a temperature of 160° C. or higher,   the dye discharge agent being a dye discharge agent comprising thiourea dioxide, wherein
 the dye discharge agent further comprises at least one of the following components (i) and (ii): 
 (i) at least one salt selected from the group consisting of a salt of monocarboxylic acid, a salt of ascorbic acid, and a salt of metasilicic acid; and 
 (ii) β-diketone. 
   
     
     
         35 . The method according to  claim 34 , wherein, in the heating step, the dye discharge agent-applied part is heated at a temperature of 185° C. or lower.