Reducing agent, ink-jet recording apparatus, discharge printing method, image forming method, reducing agent stabilizing method, and reducing agent enhancing method
A reducing agent, thiourea dioxide technology, applied in the direction of dyeing method, replication/marking method, organic chemistry, etc., can solve the problems of reduced dye discharge power, etc., and achieve the effect of excellent reducing power and excellent long-term stability effect.
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Embodiment 1-1～1-8、 comparative example 1-9
[0089] Water, thiourea dioxide, specific carboxylate, and 2-amino-2-methyl-1-propanol (AMP) as a pH regulator in the reducing agent composition of Table 1 are mixed, and ketone (N-methyl-1-propanol) is further added. acetylacetoacetamide (NMAA)), to obtain the reducing agent of Examples 1-1 to 1-8. In each of the Examples and Comparative Examples, the compounding amount of thiourea dioxide to the total amount of the reducing agent was divided into three stages of 5% by weight, 3.75% by weight, and 2.5% by weight to prepare three types of reducing agents. The compounding quantity of the specific carboxylate, pH adjuster, and ketone with respect to the total amount of the three types of reducing agents prepared was set to be the same.
[0090] Except not having added the specific carboxylate, it carried out similarly to Example 1-1, and obtained the reducing agent of the comparative example 1-9.
[0091] The enhancing effect and storage stabilizing effect of the reducing agent ...
Embodiment 2-1～2-8
[0105] Water, thiourea dioxide, a specific carboxylate, and a pH adjuster (2-amino-2-methyl-1-propanol (AMP)) shown in the reducing agent composition of Table 2 were mixed. Next, in Example 2-1, methyl acetoacetate (MAA) and urea were added. In Examples 2-2 and 2-5, N-methylacetylacetamide (NMAA) was added. In Examples 2-4 and 2-8, N-methylacetylacetamide and urea were added. In Examples 2-6, acetone was added. In Examples 2-7, urea was added. Thus, the reducing agents of Examples 2-1 to 2-8 were obtained.
[0106] In the evaluation of the storage stability of the reducing agents of Examples 2-1 to 2-8, immediately after preparation, 0.5 months after preparation, 1.0 months after, 2.0 months after, 3.0 months after, 4.0 The reducing agents of Examples 2-1 to 2-8 after 1 month and 5.0 months were evaluated in the same manner as in Examples 1-1 to 1-8 and Comparative Example 1-9.
[0107] Table 2 shows the composition and evaluation results of the reducing agent in the exam...
Embodiment 3-1
[0113] Water, thiourea dioxide, sodium formate, and pH adjuster (2-amino-2-methyl-1-propanol (AMP)) shown in the reducing agent composition of Table 3 were mixed. A further ketone (N-methylacetylacetamide (NMAA)) was added. Thus, the reducing agent of Example 3-1 was obtained. As shown in Table 3, the compounding amount of thiourea dioxide relative to the total amount of reducing agent is divided into three stages of 5% by weight (w%), 3.75% by weight (w%), and 2.5% by weight (w%) to prepare three kinds of reducing agents . It should be noted that the compounding amounts of sodium formate, pH adjuster, and ketone with respect to the total amount of the three kinds of reducing agents prepared were set to be the same.
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