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Method for preparing high-transparency high-strength pigment yellow 155 for water-based ink and water-based paint

A technology of pigment yellow and transparency, applied in the field of pigments, can solve the problems of insufficient strength, low tinting strength, unsuitable for application in water-based systems, etc., and achieve the effects of good rheological properties, good transparency and high strength

Active Publication Date: 2013-09-04
ANSHAN HIFICHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Commercially available C.I. Pigment Yellow 155 has many commercial brands, among which the transparent type is mostly used in plastics, and its crystal form is shown in the attached figure 2 , not suitable for application in water-based systems (lower tinting strength); image 3 , can be applied in water-based systems, but its strength is not high enough, and it does not meet the application objects that require high transparency. It is mainly suitable for industrial coatings

Method used

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  • Method for preparing high-transparency high-strength pigment yellow 155 for water-based ink and water-based paint
  • Method for preparing high-transparency high-strength pigment yellow 155 for water-based ink and water-based paint
  • Method for preparing high-transparency high-strength pigment yellow 155 for water-based ink and water-based paint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 16.2 g (0.1376 mol) of 31% hydrochloric acid was added to 20 ml of water, then 10 g (0.0473 mol) of dimethyl 2-aminoterephthalate was added and stirred for 1 hour. Add ice and cool down to 0-5°C, quickly add 15 g (0.0646 mol) of 30% sodium nitrite solution, keep it for 0.5 hours, add Turkish red oil as an auxiliary agent, and stir for 0.5 hours. The solution was filtered, and the mother liquor was collected to obtain diazo solution.

[0034] On the other hand, add 6.59 g (0.0236 mol) of diacetoacetyl-p-phenylenediamine and 1.95 g (0.0483 mol) of sodium hydroxide into 80 ml of water, stir until completely dissolved, and filter to obtain a solution of diacetoacetyl-p-phenylenediamine .

[0035] Add 6 g of acetic acid to 15 g of water and stir well.

[0036] Add 2 g of wetting and dispersing agent to the diacetoacetyl-p-phenylenediamine solution Disper755W and 4 grams of white carbon black were stirred for 10 minutes, then the prepared acetic acid solution was added, a...

Embodiment 2

[0040] In addition to adding 2 grams of wetting and dispersing agent to the diacetoacetyl-p-phenylenediamine solution Except for Disper755W and 4 grams of white carbon black, the rest were coupled according to the same method as in Example 1. The coupled pigment suspension is heated to 90°C and kept at this temperature for more than 10 minutes.

[0041] The pigment suspension was filtered and washed. Move the obtained filter cake into an autoclave, add 10 ml of water and 200 ml of ethanol into the autoclave, add 2 grams of wetting and dispersing agent BYK-190 and 4 grams of white carbon black at the same time, and then heat it to 125-130 °C, And keep it for 10-15 hours for pigmentation.

[0042] Add 200 grams of water to the finished pigment slurry, and reclaim ethanol by distillation. Then filter, wash, dry, and pulverize to obtain about 22.5 grams of soft yellow pigment.

Embodiment 3

[0044] In embodiment 1, add 2 grams of wetting and dispersing agents in diacetoacetyl-p-phenylenediamine solution Disper755W and 4 grams of silica were changed to 2 grams of wetting and dispersing agent Disper755W, all the other follow the same method as in Example 1, but before the thermal treatment of the coupling material (pigment suspension) needs to be filtered, add 4 grams of kaolin and stir for 0.5 hour. Get 22.5 grams of yellow soft paint.

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Abstract

The invention relates to a method for preparing high-transparency high-strength C.I. pigment yellow 155 (3GW) for water-based ink and water-based paint. According to the method, a diazo salt is obtained through diazotizing 2-amino dimethyl terephthalate in the presence of a transparent regulating substance and is coupled with a coupling component, namely diacetyl-acetyl-p-phenylenediamine, under appropriate conditions so as to obtain a crude pigment, and the crude pigment is subjected to pigmentation and surface treatment so as to obtain a yellow organic pigment with high transparency and high coloration strength. The pigment yellow is applied to water-based ink and water-based paint and has the advantages of good transparency, high strength and good rheological properties.

Description

technical field [0001] The invention relates to a pigment, in particular to C.I. Pigment Yellow 155 (3GW), a yellow organic pigment with high transparency and high strength for water-based ink and water-based paint, and a preparation method thereof. Background technique [0002] C.I. Pigment Yellow 155 is a bright green yellow organic pigment with high tinting strength, good solvent resistance, acid and alkali resistance, and is a cost-effective variety. It does not contain prohibited aromatic amines and has no potential for human body harm. Different brand names in the past can be applied to oil-based paints, plastic coloring, and can also be used for water-based inks and water-based paints. The chemical structure of C.I. Pigment Yellow 155 belongs to the azo condensation pigment, and its chemical structural formula is as follows: [0003] [0004] The conventional preparation method of C.I. Pigment Yellow 155 is: at 22°C, mix 120 parts (volume) of 31% hydrochloric aci...

Claims

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Application Information

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IPC IPC(8): C09B67/20C09B33/153C09D11/00C09D7/12
Inventor 梁铁夫王贤丰徐馨阳张志群黄海于兴春吴俊卿马茜张凤军马斌孙海波唐廷翱
Owner ANSHAN HIFICHEM CO LTD
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