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.

What is claimed is: 
     
         1 . A discharge printing agent comprising thiourea dioxide, wherein
 the discharge printing 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.   
     
     
         2 . The discharge printing agent according to  claim 1 , 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.   
     
     
         3 . The discharge printing agent according to  claim 2 , wherein
 the salt of aliphatic carboxylic acid is at least one of a salt of acetic acid and a salt of butyric acid.   
     
     
         4 . The discharge printing agent according to  claim 1 , 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.   
     
     
         5 . The discharge printing agent according to  claim 1 , wherein
 the discharge printing agent comprises both of the components (i) and (ii).   
     
     
         6 . The discharge printing agent according to  claim 1 , wherein
 the discharge printing agent comprises at least one of the components (i) and (ii) and further comprises the following component (iii):   (iii) an amine base.   
     
     
         7 . The discharge printing agent according to  claim 6 , wherein
 the component (iii) is a primary amine base.   
     
     
         8 . The discharge printing agent according to  claim 7 , wherein
 the component (iii) is 2-amino-2-hydroxymethyl-1,3-propanediol (AHP).   
     
     
         9 . The discharge printing agent according to  claim 1 , wherein
 the amount of the thiourea dioxide to be added is 0.5 wt % to 5 wt % relative to the total amount of the discharge printing 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 discharge printing agent.   
     
     
         10 . A container comprising a discharge printing agent, wherein
 the discharge printing agent is the discharge printing agent according to  claim 1 .   
     
     
         11 . The container according to  claim 10 , wherein
 a main body of the container comprises a case.   
     
     
         12 . An ink-jet recording apparatus comprising a liquid ejecting unit of ejecting a liquid, wherein
 the apparatus further comprises a unit of applying a discharge printing agent, and   the discharge printing agent is the discharge printing agent according to  claim 1 .   
     
     
         13 . A method for discharge printing of fabric, the method comprising:
 a discharge printing agent-applying step of applying a discharge printing agent to fabric; and   a heating step of heating a discharge printing agent-applied part, wherein   as the discharge printing agent, the discharge printing agent according to  claim 1  is used.   
     
     
         14 . A method for forming an image on fabric, the method comprising:
 a discharge printing step of subjecting fabric to discharge printing; and   an image printing step of printing an image on a discharge printing-subjected part with an ink, wherein   the discharge printing step is performed by the method according to  claim 13 .   
     
     
         15 . The method according to  claim 14 , wherein
 the image printing step is performed by an ink-jet method.   
     
     
         16 . A method for stabilizing a discharge printing agent that comprises thiourea dioxide, the method comprising adding at least one of the following components (i) and (ii) to the discharge printing agent,
 (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,   (ii) β-diketone.   
     
     
         17 . The method according to  claim 16 , comprising adding both the components (i) and (ii) to the discharge printing agent. 
     
     
         18 . The method according to  claim 16 , comprising adding at least one of the components (i) and (ii) to the discharge printing agent and further comprising adding the following component (iii) to the discharge printing agent,
 (iii) an amine base.   
     
     
         19 . The method according to  claim 18 , wherein
 the component (iii) is 2-amino-2-hydroxymethyl-1,3-propanediol (AHP).