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Organic rose-bengal pigment, preparation method thereof and application of pigment in water-based coating printing paste or ink

A technology of organic pigments and rose bengal, which is applied in the field of organic azo pigments, can solve the problems of yellowish color, dark shade, and difficulty in meeting the requirements of customers for vividness and shade, and achieve mild process conditions, good dispersion stability, low cost effect

Inactive Publication Date: 2017-01-11
HUNAN XINLIHUA NANO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the rose red organic pigments used in the market are mainly C.1.P.Red 146, C.1.P.Red 245 and C.1.P.Red 23. Color printing or ink can basically meet the requirements of customers, but in the case of light colors, there are some shortcomings such as yellowish color or darker color light.
Difficult to meet customer requirements for vividness and shade

Method used

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  • Organic rose-bengal pigment, preparation method thereof and application of pigment in water-based coating printing paste or ink
  • Organic rose-bengal pigment, preparation method thereof and application of pigment in water-based coating printing paste or ink
  • Organic rose-bengal pigment, preparation method thereof and application of pigment in water-based coating printing paste or ink

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Experimental program
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Embodiment 1

[0029] 1. Diazo reaction

[0030] Open the exhaust butterfly valve, first inject 2000KG water into the diazo reaction tank, add 29.3 parts of hydrochloric acid, and start the mixer. Add 14.6 parts of red base KD through the manhole, stir for 10 minutes, cool with ice cubes to below 0°C, quickly add 4.6 parts of completely dissolved sodium nitrite solution, and test it with potassium iodide test paper one minute later, it turns purple. Keep the temperature of the diazo component below 5°C, add 0.5 parts of sulfamic acid (dissolved in advance) after 1.5 hours, and after two minutes, the diazonium salt solution is colorless when tested by potassium iodide test paper, and close the exhaust butterfly valve of the mixer.

[0031] 2. Dissolution of naphthol AS-PH

[0032] Open the exhaust butterfly valve, add 2000KG water, start the mixer, inject 17.8 parts of caustic soda (30%), turn on steam and heat to 85°C to stop, add 19.1 parts of naphthol AS-PH from the manhole and continue s...

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Abstract

The invention provides an organic rose-bengal pigment, a preparation method thereof and application of the pigment in water-based coating printing paste or ink. A red base KD, hydrochloric acid and sodium nitrite perform diazotization reaction to generate red base KD diazonium salt; an azoic coupling component AS-PH reacts with sodium hydroxide to generate azoic coupling component AS-PH salt; then the red base KD diazonium salt and the azoic coupling component AS-PH salt perform coupling reaction to obtain the organic rose-bengal pigment. The water-based coating printing paste and ink prepared by adopting the organic rose-bengal pigment has the biggest advantage that when the color is light, a pure, bright and unique blue-phase color tone is shown.

Description

technical field [0001] The invention relates to a rose bengal organic pigment, in particular to a rose bengal organic pigment and its preparation method and application in water-based paint printing paste or ink, belonging to the technical field of organic azo pigments. Background technique [0002] At present, the rose red organic pigments used in the market are mainly C.1.P.Red 146, C.1.P.Red 245 and C.1.P.Red 23. When printing or printing ink, it can basically meet the requirements of customers, but in the case of light colors, there are some shortcomings such as yellowish color or darker color light. Difficult to meet customer requirements for vividness and shade. Contents of the invention [0003] Aiming at the defects of rose bengal organic pigments in the prior art, the purpose of the present invention is to provide a new type of rose bengal organic pigment formed by diazo coupling of red base KD and naphthol AS-PH, which can be used to prepare pure shade The wate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B29/34C09B67/20D06P1/642C09D11/037
CPCC09B29/34C09B67/0065C09D11/037D06P1/6425
Inventor 谭建国
Owner HUNAN XINLIHUA NANO TECH
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