Preparing method for yellow paint

A yellow pigment and diazo technology, applied in chemical instruments and methods, coupling reaction of azo dyes, azo dyes, etc., can solve the problems of high oil absorption, low tinting strength, high color strength, etc., and achieve low oil absorption , strong tinting power, and the effect of improving transparency

Active Publication Date: 2017-01-25
浙江东海新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the four-color offset printing ink, yellow is overprinted as the last layer. In order not to cover other colors, the yellow pigment is required to be highly transparent, and also requires high color strength, low oil absorption and high brightness. Pigment Yellow 12 for color set offset printing has the following problems: relying on a large amount

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0009] Embodiment 2, a preparation method of a yellow pigment, comprising the following steps: the following kg numbers are mass kg numbers, 1, put 1500 kg of water in the diazo tank, add 225 kg of hydrochloric acid, add 3,3'-dichlorobis Aniline hydrochloride 150kg, beating for 30 minutes and cooling down to 0°C, quickly adding solid sodium nitrite, reacting for 1 hour, until the starch-potassium iodide test paper is slightly blue, PH≦1, temperature 3°C; 2, add 2000kg of water to the dissolution tank , add 175 kg of liquid caustic soda, add 223 kg of N-acetylacetanilide and 0.6 kg of PMP, stir for 60 minutes, and dissolve transparently; 3, add 300 kg of water in the auxiliary material tank, heat up to 70 ° C, add 25 kg of quaternary ammonium salt, and dissolve until it is clear and transparent; 4, add 300kg of water to the rosin bucket, add 20kg of sodium hydroxide to boil, then add 30kg of disproportionated rosin, and add 5kg of hyperdispersant until it is clear and transparen...

Embodiment 3

[0010] Embodiment 3, a preparation method of a yellow pigment, comprising the following steps: the following kg numbers are mass kg numbers, 1, put 1500 kg of water in the diazo bucket, add 225 kg of hydrochloric acid, add 3,3`-dichlorobis Aniline hydrochloride 150kg, beating for 30 minutes, cooling down to -1°C, quickly adding solid sodium nitrite, reacting for 1 hour, until the starch-potassium iodide test paper is slightly blue, PH≦1, temperature 2°C; 2, add water to the dissolution tank 2000kg, add 175kg of liquid caustic soda, add 223 kg of N-acetylacetanilide and 0.6kg of PMP, stir for 50 minutes, and dissolve transparently; 3, add 300kg of water to the auxiliary material tank, heat up to 70°C, add 25kg of quaternary ammonium salt, 4. Add 300kg of water to the rosin bucket, add 20kg of sodium hydroxide to boil, then add 30kg of disproportionated rosin, and add 5kg of hyperdispersant after it is clear and transparent; 5. Add it to the coupling bucket 1000kg of water, add ...

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PUM

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Abstract

The invention discloses a preparing method for yellow paint, comprising the following steps: 1. putting water, hydrochloric acid, 3,3`- dichlorobiphenylamine hydrochloride and solid sodium nitrite into diazonium barrel for carrying out diazotization reaction; 2. adding water, liquid alkali, N-acetacetoanilide and PMP into solution barrel for carry out coupling; 3. adding 300 parts of water into additive chemical barrel, heating up to 70oC, adding 25kg of quaternary ammonium salt, melting to bright transparency; 4. boiling after adding water and sodium hydroxide into rosin barrel, adding disproportinated rosin, adding hyperdispersant; 5. adding water and natrium aceticum into coupling barrel, adding diluted hydrochloric acid and adjusting the pH to 6.0-6.5, diazotization coupling at 40-45oC, adding the fluid in step 3, using sodium hydroxide solution to adjust the pH=10.0-10.5 for more than 10 minutes, keeping warm, cooling, filter pressing, rinsing,drying and getting the finished goods with bright color, high transparency, strong coloring power, low oil absorbing quantity and high gloss.

Description

technical field [0001] The invention belongs to the technical field of pigment production and processing, in particular to a preparation method of a yellow pigment. Background technique [0002] Pigments are powdered substances used for coloring. It is insoluble in water, oil, resin, organic solvent and other media, but can be evenly dispersed in these media and can color the media, so it has a certain covering power. [0003] Pigment yellow 12, its hue is almost a positive yellow, just suitable for yellow among the basic three primary colors of pigments, and the price is low, so it consumes the most among all yellow pigment varieties. It is used in rubber printing, low-grade solvent ink, water-based and low-grade plastic, especially in offset printing ink, which is almost dominant in the world. In the four-color offset printing ink, yellow is overprinted as the last layer. In order not to cover other colors, the yellow pigment is required to be highly transparent, and als...

Claims

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Application Information

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IPC IPC(8): C09B35/035C09B35/10C09B67/20C09B41/00
CPCC09B35/035C09B35/105C09B41/007C09B67/006
Inventor 陈阿胖陈江沈德虎
Owner 浙江东海新材料科技股份有限公司
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