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Black dye mixture for ink of inkjet printing

A black dye, inkjet printing technology, applied in the field of black dyes, can solve the problems of low inkjet equipment corrosion, reduced printing performance, improved ink and other problems, and achieves outstanding solubility, high thermal and chemical stability, and excellent solubility. Effect

Active Publication Date: 2014-06-18
SHANGHAI SERUDAN DYESTUFF CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of phosphate and borax will lead to an increase in the salt content of the ink; organic amine compounds have high alkalinity, and when added enough to have good buffer performance, the pH of the ink will be high, which is easy to cause reactive dyes hydrolysis; if the amount added is too small, it will not achieve better buffer performance
In addition, even with the use of a buffer solution, the dye components in the ink are gradually hydrolyzed
Ultimately, it leads to the reduction of printing performance and the corrosion of inkjet equipment due to too low pH

Method used

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  • Black dye mixture for ink of inkjet printing
  • Black dye mixture for ink of inkjet printing
  • Black dye mixture for ink of inkjet printing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0086] Embodiment: including 1) preparation of dyestuff; 2) test

[0087] 1) Preparation of dye: refer to figure 1 ,

[0088] In the first step, 30kg of the dye with structural formula (I-1) was dissolved in 800kg of pure water at 20°C, and 7kg of trisodium phosphate was added to adjust the pH to about 10. After stabilization, 11.5kg of methyl taurine was added, and the temperature was raised to Keep warm at 90° C. for 10 minutes, and then adjust the pH to 5.5 with 60% acetic acid to obtain the dye with the structural formula (I-2).

[0089] In the second step, 25kg of structural formula is (II-1) dye, dissolved in 900kg of pure water at 20°C, adding 6kg of trisodium phosphate to adjust the pH to about 9.5, adding 8.9kg of methyl taurine after stabilization, and heating up to Incubate at 85° C. for 10 minutes, and then adjust the pH to 6 with 60% acetic acid to obtain the dye with the structural formula (II-2).

[0090] The 3rd step, with 35kg structural formula being the d...

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PUM

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Abstract

The invention relates to the technical field of dye, in particular to black dye, which is a black dye mixture used for ink of inkjet printing. The black dye mixture comprises a dye component A, wherein R or H is an organic straight chain. V is an organic chain formed by 2 to 4 carbon atoms. X is a water-soluble group, and M is monovalent cations. By means of the technical scheme, the black dye mixture does not change hue of the prior dye, is stable, stands out in solubility and is especially suitable for ink of inkjet printing for paper.

Description

Technical field [0001] The present invention relates to the technical field of dyes, and in particular to a black dye. Background technique [0002] Ink for inkjet printing can be divided into dye-based ink and pigment-based ink. Dye-based ink can be divided into water-soluble ink and dispersed ink. Water-soluble ink is the ink used by most inkjet printers at present. It is an ink with water as the main component of dissolved dye. The dye components can be direct dyes, acid dyes, reactive dyes and basic dyes. [0003] Inkjet printing inks require high thermal and chemical stability. The performance parameters that affect the ink printing effect mainly include the following: [0004] (1) Viscosity and surface tension: Viscosity is the resistance to liquid flow, and the surface tension of a liquid is related to whether droplets can be formed. Generally speaking, inkjet inks should have a low viscosity and high surface tension to ensure good flow properties and droplet morp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B67/22C09B67/24C09D11/328
Inventor 郑文军刁正平施卫斌
Owner SHANGHAI SERUDAN DYESTUFF CHEM