Method for preparing mono-azo 2:1 chromium complex dyes and and their use

A technology of chromium complexes and monoazo, which is applied in the direction of azo dyes, complex metal compounds of azo dyes, organic dyes, etc., can solve the undiscovered monoazo 2:1 type chromium complex dye preparation method and other issues, to achieve the effect of improving equipment utilization, high yield and reducing production cost

Inactive Publication Date: 2004-11-10
HUBEI DINGLONG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] No preparation method for monoazo 2:1 type chromium complex dyes used in the preparation of inkjet inks has been found in the prior art

Method used

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  • Method for preparing mono-azo 2:1 chromium complex dyes and and their use
  • Method for preparing mono-azo 2:1 chromium complex dyes and and their use
  • Method for preparing mono-azo 2:1 chromium complex dyes and and their use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027]

[0028] 140 parts of double distilled water, 5.5 parts of sodium hydroxide, 31.96 parts of II (R=6-nitro and 4-neopentyl), 3 parts of nonionic surfactant (HLB=18), stirred at 20-25°C After 2-3 hours, add 9.4 parts of sodium nitrite and stir at 20-25°C for 1 hour. This mixture was then added to a solution containing 110 parts of water and 52.6 parts of hydrochloric acid and stirred at 0-15°C for 1 hour. Slowly add the diazonium reaction mixture prepared above to the dissolved solution containing 220 parts of twice distilled water, 12 parts of sodium hydroxide, and 20 parts of β-naphthol solution for coupling, and stir at 30-40°C for 2-3 Hour. The reaction mixture was filtered with a Buchner funnel, washed with water, and the filter cake was dried at 80°C to obtain 54 parts of III. The purity of III reaches 99.3% by HPLC analysis.

[0029] Mix the III prepared above with 45 parts of ethylene glycol, 30 parts of chromium lactate, and 9 parts of carbamide, and offset...

Embodiment 2-5

[0033] According to the method of Example 1, different Is were obtained respectively.

[0034]

Embodiment 6

[0036]

[0037] Three different kinds of II, respectively 7.2 parts of R=4-neopentyl; 6-nitro, 8 parts of R=5-nitro, 7.5 parts of R=4-nitro, in 110 parts of twice distilled water, 5.5 Parts of sodium hydroxide and 3 parts of nonionic surfactant (HLB=18) were mixed and stirred for 2 hours, then 9.7 parts of sodium nitrite was added, and then stirred at 20-25° C. for 1 hour. This mixture was added to a solution containing 110 parts of water and 52.6 parts of hydrochloric acid at 0-5°C and stirred at 0-5°C until the diazo reaction was complete.

[0038] Then the above-mentioned diazo reaction mixture was added to a solution containing 220 parts of twice distilled water, 12.3 parts of sodium hydroxide, 3.4 parts of sodium bicarbonate and 19.9 parts of β-naphthol at 10-20 ° C, and diluted with dilute hydroxide Sodium solution or hydrochloric acid solution adjusts the reaction pH to 8-9, and stirs the reaction at 30-40° C. for 2-4 hours. Then react at 70-90°C for 1 hour. Then f...

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PUM

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Abstract

The invention relates to a process for preparing monoazo 2:1 chrome complex dye comprising, reacting one or more categories of aromatic ortho-aminophenol with sodium nitrite in water solution of hydrochloric acid or sulfuric acid, subjecting the reacted mixture to coupling reaction with B-naphthol queous alkali, filtering and drying the coupling product, reacting with trivalent chromium salt in organic solvent at the presence of acid-binding agent. The process according to the invention can be applied in particular to the preparation of color-developing agent for ink-ejecting ink, as well as the coloring charge modifier during the photoelectric image formation process.

Description

technical field [0001] The invention relates to a preparation method and application of a monoazo 2:1 type chromium complex dye. The dye is particularly useful as a colored charge modifier in inkjet inks and photo-graphic processing. It can also be used for the coloring of oil products, plastics, resins, special coatings, etc. Background technique [0002] No method for preparing monoazo 2:1 chromium complex dyes for inkjet inks has been found in the prior art. Contents of the invention [0003] The object of the present invention is to provide a preparation method and application of a monoazo 2:1 type chromium complex dye, the method is not only simple, the production cost is low, and the yield is high. The prepared monoazo 2:1 type chromium complex dye is especially suitable for use as a coloring charge regulator in the process of ink-jet ink and photoelectric imaging process. [0004] The technical scheme provided by the invention is: the preparation method of monoaz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B45/16
Inventor 左新举兰泽冠朱双全
Owner HUBEI DINGLONG CO LTD
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