Water-based sunlight-resistant red pigment and preparation method thereof

A light-fast red and pigment technology, applied in the field of chemical pigments, can solve the problems of poor printing performance, poor emulsification of offset printing ink, water pollution, etc., and achieve the effect of improving water resistance and increasing emulsification.

Active Publication Date: 2019-03-08
宣城英特颜料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Different pigments are added to paint nitro inks, but due to the characteristics of the pigments, in the application of paint processing, due to the chemical structure of the azo lake, the dye containing water-soluble groups reacts with divalent metal ions (called color lakes) chemical reaction) to obtain slightly water-soluble pigments, the lake reaction is not complete, and some water-soluble dyes remain, so its water resistance is poor
Poor water resistance will cause water pollution in the ink tank during the application of offset printing ink, and will also deteriorate the emulsification of offset printing ink, thereby deteriorating the printing performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Preparation of rosin liquid: start stirring, add 2 parts of potassium hydroxide to water, add 15 parts of rosin, stir and dissolve for 30 minutes, check that it is completely transparent, and obtain rosin liquid;

[0022] (2) Preparation of diazo solution: start stirring and adjust the motor speed to 35HZ, add 35 parts of RC base and 10 parts of G red base, heat up to 40 degrees, add ammonia water, PH=8.5, check the dissolution and transparency, add ice to cool down To 25 degrees, adjust the motor; speed 50HZ, quickly add hydrochloric acid and continue to add ice to 0 degrees; stir for 20 minutes, add 15 parts of sodium nitrate, and when finished, check the end point of diazotization with PH test paper and KI test paper, requiring PH test paper to be redder. The KI test paper is blue, the temperature is 0 degrees, and the delay is 20 minutes. Check the diazotization end point. The KI test paper is slightly blue to slightly blue, and the diazonium solution is obtained...

Embodiment 2

[0026] (1) Preparation of rosin liquid: start stirring, add 4 parts of potassium hydroxide to water, add 20 parts of rosin, stir and dissolve for 35 minutes, check that it is completely transparent, and obtain rosin liquid;

[0027] (2) Preparation of diazo solution: start stirring and adjust the motor speed to 35HZ, add 40 parts of RC and 20 parts of RC, heat up to 40 degrees, add ammonia water, PH=8.6, check the dissolution and transparency, add ice to cool down To 25 degrees, adjust the motor; speed 50HZ, quickly add hydrochloric acid and continue to add ice to -1 degrees; stir for 20 minutes, add 30 parts of sodium nitrate, and when finished, check the end point of diazotization with PH test paper and KI test paper, and the PH test paper is required to be red , the KI test paper is blue, the temperature is 1 degree, and the delay is 20 minutes. Check the diazotization end point. The KI test paper is slightly blue to slightly blue, and the diazonium solution is obtained;

...

Embodiment 3

[0031] (1) Preparation of rosin liquid: start stirring, add 6 parts of potassium hydroxide to water, add 23 parts of rosin, stir and dissolve for 40 minutes, check that it is completely transparent, and obtain rosin liquid;

[0032] (2) Preparation of diazo solution: start stirring and adjust the motor speed to 35HZ, add 50 parts of RC and 25 parts of RC, heat up to 40 degrees, add ammonia water, PH=9.0, check the dissolution and transparency, add ice to cool down To 25 degrees, adjust the motor; speed 50HZ, quickly add hydrochloric acid and continue to add ice to -1 degrees; stir for 20 minutes, add 30 parts of sodium nitrate, and when finished, check the end point of diazotization with PH test paper and KI test paper, and the PH test paper is required to be red , the KI test paper is blue, the temperature is 1 degree, and the delay is 20 minutes. Check the diazotization end point. The KI test paper is slightly blue to slightly blue, and the diazonium solution is obtained;

...

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PUM

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Abstract

The invention discloses a water-based sunlight-resistant red pigment and a preparation method thereof. The pigment comprises the following components in parts by weight: 15-23 parts of rosin, 45-75 parts of chromophore, 18-25 parts of an azoic coupling component AS-PH, 15-30 parts of sodium nitrite, 7-10 parts of liquid caustic soda, 15-20 parts of hydrochloric acid, 2-4 parts of ammonia water, 2-6 parts of potassium hydroxide, 3-5 parts of calcium chloride, 5-10 parts of kaolin and 3-7 parts of an auxiliary agent. Through addition of the rosin with relatively strong water resistance into thepigment, the water resistance of the pigment is improved and the emulsibility of offset ink is greatly improved.

Description

technical field [0001] The invention relates to the technical field of chemical pigments, in particular to a water-based sunfast scarlet pigment and a preparation method thereof. Background technique [0002] Different pigments are added to paint nitro inks, but due to the characteristics of the pigments, in the application of paint processing, due to the chemical structure of the azo lake, the dye containing water-soluble groups reacts with divalent metal ions (called color lakes) chemical reaction) to obtain a slightly water-soluble pigment, the lake reaction is not complete, and some water-soluble dyes remain, so its water resistance is poor. Poor water resistance will cause water pollution in the ink tank during the application of offset printing ink, and will also deteriorate the emulsification of offset printing ink, thereby deteriorating the printing performance. Contents of the invention [0003] The object of the present invention is to propose a water-based sunf...

Claims

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Application Information

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IPC IPC(8): C09B29/20C09D11/037
CPCC09B29/20C09D11/037
Inventor 李长华陈后龙
Owner 宣城英特颜料有限公司
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