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Ink jet dye capable of improving the service life of nozzle

A dye and inkjet printing technology, applied in the direction of azo dyes, organic dyes, monoazo dyes, etc., can solve problems such as clogged nozzles and nozzles that have not been completely resolved, and achieve the elimination of dangerous factors, not easy to deposit carbon, The effect of extending the service life

Inactive Publication Date: 2005-09-07
DALIAN UNIV OF TECH
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AI Technical Summary

Problems solved by technology

[0004] (2) Volatility of ink: According to the needs, the inkjet machine will sometimes stop using for several days or longer. Drying occurs, and solids such as dyes settle in the nozzle, causing nozzle clogging
However, the solubility of sodium ion dyes in the presence of humectant is lower than that of organic ammonium ions, and the nozzle will be blocked when the machine is idle. Therefore, in terms of the solubility and heat resistance stability of dyes, the effect of sodium ions on dyes has contradictory results.
Thereby U.S. Patents US5069718, US4685968, US4761180, US5534051, US5858075, etc. all control the relative amount of sodium ion and organic ammonium ion in a certain ratio, such as sodium in the range of 25-75%, to achieve relatively better results, but this A contradiction has not yet been completely resolved

Method used

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  • Ink jet dye capable of improving the service life of nozzle
  • Ink jet dye capable of improving the service life of nozzle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] magenta dye k 2 (general structural formula I, R 1 for II, R 2 for N(CH 2 CH 2 Oh) 2 , R 3 for 2-COOM 3 ,M 1 , M 2 , M 3 For the synthesis of H or Na):

[0021] One condensation: 55.5 g of cyanuric chloride was added in 400 g of ice water, stirred and beaten for 30 minutes at 0° C., and then 15% H-acid (i.e. 1-amino-8 hydroxy-3,6-dinaphthalene was added within 1.5 hours) Sulfonic acid) aqueous solution (containing 102.3g of pure H-acid, adjust the pH to 6-6.2 with sodium carbonate, stir and react at 3-5°C for 3-5 hours, filter the solution to remove a small amount of solid impurities, and obtain a condensation solution.

[0022] Diazotization: Add 87.6g of 30% hydrochloric acid and 41.1g of anthranilic acid to 100g of ice water, stir below 10°C, add dropwise 30% sodium nitrite solution (containing 20.7g of pure sodium nitrite), at 10-15°C The reaction was stirred for 0.5 hours, and the solution was filtered to remove a small amount of solid impurities to obta...

Embodiment 2

[0029] magenta dye k 1 (general structural formula I, R 1 for II, R 2 for NHCH 2 CH 2 OH,R 3 for 2-COOM 3 ,M 1 , M 2 , M 3 For the synthesis of H or Na).

[0030] The synthesis process is the same as in Example 1, except that the 31.5g diethanolamine added in the triple coupling is changed to 18.3g ethanolamine to obtain 387g dye k 1 . The maximum absorption wavelengths of ultraviolet-visible spectrum in aqueous solution are 519 and 544nm.

[0031] 1 HNMR: δ DMSO (PPM)=3.4(2H, m), 3.6(2H, t, J=6.8), 4.9(2H, s), 6.9(1H, t, J=7.2), 7.2(1H, t, J=7.6) , 7.3(1H, t, J=7.2), 7.4(1H, s), 7.4(1H, s), 7.5(1H, t, J=7.2), 7.6(1H, t, J=7.2), 8.0( 2H, d, J = 7.2), 8.4 (1H, d, J = 7.2), 8.4 (1H, d, J = 8), 8.8 (1H, d, J = 8), 9.5 (1H, s), 12.9 (1H,s), 13.1(1H,s), 16.9(1H,s). The single peak at 16.9 indicates that this structure is a quinone hydrazone isomer. Electrospray mass spectrometry detection, M 1 , M 2 , M 3 Timed in H, k 2 The molecular mass should be 740. In ne...

Embodiment 3

[0033] dye k 0 (general structural formula I, R 1 for II, R 2 for OH, R 3 for 2-COOM 3 ,M 1 , M 2 , M 3 For the synthesis of H or Na):

[0034] The synthesis process is the same as in Example 1, except that the 31.5 g of diethanolamine added in the triple coupling is changed to 12.0 g of sodium hydroxide to obtain 368 g of dye k 0 . The maximum absorption wavelengths of ultraviolet-visible spectrum in aqueous solution are 517 and 541nm.

[0035] 1 HNMR: δ D2O (PPM)=6.9(1H, t, J=7.2), 7.1(1H, t, J=7.6), 7.3(1H, s), 7.4(1H, t, J=7.2), 7.4(1H, s) , 7.5 (1H, t, J = 7.2), 7.9 (1H, d, J = 7.2), 8.0 (1H, d, J = 7.2), 8.3 (1H, d, J = 7.2), 8.8 (1H, d , J=8), 9.1 (1H, s), 17.3 (1H, s). The single peak of 17.3 indicates that this structure is a quinone hydrazone isomer.

[0036] Electrospray mass spectrometry detection, M 1 , M 2 , M 3 In H time, dye k 0 The molecular mass should be 697. In negative mode, the electrospray mass spectrum has a base peak with a mass-to-c...

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Abstract

The invention relates to a mew type of ink-ejecting dye which can be used in computer ink-ejecting print, chromatic colour print and textile digital ink-ejecting screen printing. Said dye mixes with lower boiling alcohol, humectant, higher boiling organic solvent to get the ink-ejecting ink, and the dye don't accumulates on injector for its special structure and avoids accumulating carbon for the heating effect, and as a result reduces the danger of injector destruction and increases its length of life.

Description

technical field [0001] The invention belongs to the dyestuff and ink composition in the ink used in the technical fields of computer inkjet printing, color inkjet printing and textile digital inkjet printing. Background technique [0002] Digital inkjet printing (inkjet, inkjet printing) technology, through computer control, sprays micro-ink droplets onto the surface of the substrate through the nozzle to form the required printed text or image. The quality of printing is closely related to the quality of ink drop formation, and the dye used plays a key role. Dyes usually contain many functional groups and charges, which not only affect the printing quality, but also affect the stability of the ink and the service life of the nozzle. According to the principle of ink droplet formation, the nozzle is divided into two types: piezoelectric and thermal foaming, both of which are composed of micropores with a diameter of 10-15 microns. In addition to internal factors such as it...

Claims

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Application Information

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IPC IPC(8): C09B29/00C09D11/328
Inventor 彭孝军崔京南张蓉杨华军王立军钟广金王力成
Owner DALIAN UNIV OF TECH
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