Chrome complex dye as well as preparation method and applications thereof

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

Active Publication Date: 2010-03-10
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

Experimental program
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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, add 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 oxidative complexing reagent in the ratio of 1: (0.5-2) into the reaction vessel, and Water used as a solvent is added. Raise the temperature in the reaction vessel to 60-150℃ to oxidize the dye and the hexavalent chromium compound, and at the same time, the dye is complexed with the trivalent chromium chromium formed by the reduction. During the reaction, the pH value of the system remains 1-6, and the reaction time For 0.5-8 hours.

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

Embodiment 1

[0086] Two-step method: Add 150.0 parts of mordant black 7 dye to a 2L three-necked flask, add 1L of deionized water, heat up to 70~80℃, slowly add 53.6 parts of sodium dichromate, keep it boiling for 6h, and control the pH at 6.0 , To obtain a black thick slurry, reduce the temperature to 70 ~ 80 ℃, slowly add 54.02 parts of tartaric acid. After reacting for 5 hours under boiling, the pH is controlled at 3.0, the reactant becomes a solution, cooled, and the pH is adjusted to 8.5-8.6. 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. Through HPLC preparation and separation, pure compounds of compound dye 7-1-a and compound dye 7-1-b were obtained respectively. The molecular molar mass of the compound dye 7-1-a should be 676.9 (M' in Na), and the electrospray mass spectrometry (API-ES) detection, in the negat...

Embodiment 2

[0090] Substituting 54.0 parts of tartaric acid in Example 1 with 32.0 parts of oxalic acid, and other conditions unchanged, a 1:1 chromium complex dye dye 7-2 of mordant black 7 was obtained. 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 preparation and separation. The molecular molar mass of the compound dye 7-2-a should be 617.8 (M' is calculated as Na), and the electrospray mass spectrometry (API-ES) detection. In the negative mode, the electrospray mass spectrometry has a base peak with a mass-to-charge ratio of 285.9, which is The two negative ion peaks of the dye (molecular mass [M-2Na] / 2) and the one negative ion peak ([M-Na]) with a mass-to-charge ratio of 594.8 all prove that the dye molecular weight M is 617.8; compound dye 7-2-b The molecular molar mass M should be 631.8 (M' in Na), and the electrospray mass spectrometry (API-ES) detection...

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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 watersolubility 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 kind of chromium complex dyes with good water solubility and excellent weather resistance, and 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 resistance, ozone resistance, and water fastness, but they are difficult to process and easy to block the inkjet ink. The ink head, the color is not bright enough and the high cost and other shortcomings limit its application. Compared with pigment-based inkjet inks, dye-based inkjet inks have the following advantages [0003] (1) Good permeability, abrasion resistance and stability, not easy to block the print head. [0004] (2) Bright color, complete dye chromatogram and wide selection range. [0005] (3) Since more than 60% of the ingredients are water, the cost is relatively low and mee...

Claims

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Application Information

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Patent Type & Authority Applications(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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