Chrome complex dye as well as preparation method and applications thereof

A technology of chromium complexation and dyes, which is applied in dyeing methods, azo dyes, organic dyes, etc., and can solve the problems of poor weather fastness of inkjet inks, etc.

Active Publication Date: 2012-06-06
DALIAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0026] In order to fundamentally solve the problem of poor weather fastness of inkjet inks, it is necessary to improve the molecular structure of dyes

Method used

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  • Chrome complex dye as well as preparation method and applications thereof
  • Chrome complex dye as well as preparation method and applications thereof
  • Chrome complex dye as well as preparation method and applications thereof

Examples

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preparation example Construction

[0059] The preparation method of the chromium complex dye of the present invention is as follows.

[0060] Under stirring, the mordant black dye and the hexavalent chromium compound or the mixture of the hexavalent chromium compound and the trivalent chromium compound used as an oxidation complexing reagent are added to the reaction vessel in a ratio of 1: (0.5-2), and Water was added as solvent. Raise the temperature in the reaction vessel to 60-150°C to oxidize the dye and the hexavalent chromium compound, and at the same time complex the dye with the reduced trivalent chromium. During the reaction, the pH value of the system is kept at 1-6, and the reaction time is 0.5-8 hours.

[0061] The molar ratio of dye:oxidative complexing agent is preferably 1:(0.8-1.5). The reaction temperature is preferably 60-120°C, more preferably 70-110°C, and still more preferably 80-102°C. The reaction time is preferably 1-8 hours, more preferably 2-6 hours, and more preferably 3-6 hours. ...

Embodiment 1

[0086]Two-step method: Add 150.0 parts of media black 7 dye to a 2L three-necked flask, add 1L of deionized water, raise the temperature to 70-80°C, slowly add 53.6 parts of sodium dichromate, heat up and boil for 6 hours, and control the pH at 6.0 , to obtain a thick black slurry, lower the temperature to 70-80°C, and slowly add 54.02 parts of tartaric acid. React for 5 hours under boiling, the pH is controlled at 3.0, the reactant becomes a solution, cooled, the pH is adjusted to 8.5-8.6, and the high-pressure reverse osmosis membrane is desalted to obtain a 1:1 chromium complex dye 7-1 of Mordant Black 7. According to HPLC-ESI-MS analysis, the product mainly contains compound dye 7-1-a and compound dye 7-1-b. The pure compounds of compound dye 7-1-a and compound dye 7-1-b were obtained by HPLC preparative separation. The molecular molar mass of compound dye 7-1-a should be 676.9 (M' is calculated as Na), electrospray mass spectrometry (API-ES) detects, and in negative mode...

Embodiment 2

[0090] 54.0 parts of tartaric acid in Example 1 were replaced with 32.0 parts of oxalic acid, and other conditions remained unchanged, to obtain 1:1 chromium complex dye dye 7-2 of media black 7. According to HPLC-ESI-MS analysis, it mainly contains compound dye 7-2-a and compound dye 7-2-b. The pure compounds of dye 7-2-a and compound dye 7-2-b were obtained by HPLC preparative separation. The molecular molar mass of compound dye 7-2-a should be 617.8 (M' is calculated as Na), electrospray mass spectrometry (API-ES) detects, and in negative mode, electrospray mass spectrometry has the base peak of mass-to-charge ratio 285.9, is The double negative ion peak (molecular mass [M-2Na] / 2) of the dye and the single negative ion peak ([M-Na]) with a mass-to-charge ratio of 594.8 all prove that the molecular molar mass M of the dye is 617.8; the compound dye 7-2-b The molecular molar mass M should be 631.8 (M' in Na), detected by electrospray mass spectrometry (API-ES), and in negati...

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Abstract

The invention relates to a chrome complex dye containing a mordant black dye and a chrome complex, wherein the chrome complex is formed as follows: using a hexavalent chromium compound, or a mixture of the hexavalent chromium compound and a trivalent chromium to oxidize the mordant black dye to generate the black chrome complex dye. The chrome complex dye has excellent weather resistance and water solubility and can be used as colorant of ink-jet printing ink, oil ink, coating, paint, toner of laser printing, and the like.

Description

technical field [0001] The invention relates to a class of chromium complex dyes with good water solubility and excellent weather resistance, a preparation method and application thereof. Background technique [0002] Digital inkjet inks are divided into pigment-based inkjet inks and dye-based inkjet inks. Among them, the images ejected by pigment-based inkjet inks have the advantages of light fastness, ozone resistance, and water fastness, but the processing is difficult and the inkjet is easy to be blocked. The shortcomings of ink head, not bright enough color and high cost limit its application. Compared with pigment-based inkjet inks, dye-based inkjet inks have the following advantages [0003] (1) Good permeability, wear resistance, and stability, and it is not easy to block the print head. [0004] (2) The color is bright, the color spectrum of the dyes used is complete, and the selection range is wide. [0005] (3) Since more than 60% of the composition is water, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B45/34C09B67/22C09B67/36C09D11/02C09D7/12G03G9/09D21H21/28D21H17/09D21H17/11D06P1/10C04B41/82C03C1/04C08K5/42C09D11/03C09D11/328
Inventor 彭孝军王静月李少磊张剑洲樊江莉孙世国张蓉
Owner DALIAN UNIV OF TECH
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