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High-weather-resistance organic pigment and preparation method thereof

A technology of organic pigments and high weather resistance, applied in the field of organic pigments, can solve the problems of reducing the weather resistance of organic pigments, inability to disperse uniformly, and poor light fastness, so as to increase dispersion, enhance weather resistance, light blocking ability and weather resistance Ability to improve the effect of poor light fastness

Pending Publication Date: 2022-05-13
江西隆源化工股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] First, this kind of organic pigment has low surface energy and strong hydrophobicity. It is difficult to infiltrate in water without adding additives, let alone achieve uniform dispersion in water.
[0005] Second, this organic pigment has disadvantages such as poor resistance to strong acid and alkali, and poor light fastness. These shortcomings make the pigment extremely susceptible to the influence of the external environment and reduce the weather resistance of the organic pigment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This embodiment provides a technical solution: an organic pigment, the manufacturing steps of which are as follows:

[0032] Step 1: Add distilled water into the reaction vessel with stirring and temperature control functions, control the temperature of the distilled water to a low temperature state, then add concentrated acid aqueous solution to the inside and stir it, when the temperature drops to a low temperature state, then add Add an organic pigment into the reaction vessel, and stir at a constant temperature until the organic pigment is completely dissolved to obtain a reaction solution A;

[0033] Step 2: Slowly add an aqueous solution of sodium nitrite to the reaction solution A at low temperature, and react for 20-60 minutes to obtain the reaction solution B;

[0034] Step 3: Add aqueous sodium hydroxide solution to the inside of the new reaction vessel, raise its temperature to 70-90°C, then add polymer resin and colorant to it, and cool down after the polyme...

Embodiment 2

[0037] This embodiment provides a technical solution: an organic pigment, the manufacturing steps of which are as follows:

[0038] Its main preparation steps are the same as in Example 1. Only in step 2, slowly add 60 kg of 10% sodium nitrite aqueous solution with a mass concentration of 10% to the reaction solution A at 3° C., and react for 30 minutes to obtain 85 L of reaction solution C. Obtain the finished organic pigment of 11.5kg in step 4.

Embodiment 3

[0040] This embodiment provides a technical solution: an organic pigment, the manufacturing steps of which are as follows:

[0041] Step 1: Add 30 L of distilled water to a reaction vessel with a stirring and temperature control function in a capacity of 100 L, control the temperature of the distilled water to 3° C., then add 9 L of concentrated hydrochloric acid aqueous solution with a mass concentration of 38.3% and Stir, and when the temperature drops to 3°C, add 11kg of organic pigment to the reaction vessel, and stir at constant temperature until the organic pigment is completely dissolved to obtain reaction solution A;

[0042] Step 2: Slowly add 49.7 kg of 10% sodium nitrite aqueous solution to the reaction solution A at 3° C., and react for 30 minutes to obtain 91 L of reaction solution B;

[0043] Step 3: Add 50L of 5% sodium hydroxide aqueous solution into a reaction vessel with a volume of 200L, raise its temperature to 85°C, and then add 8.3kg of polymer resin and ...

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PUM

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Abstract

The invention discloses a high-weather-resistance organic pigment and a preparation method thereof, and relates to the technical field of organic pigments. Comprising 20-25 parts of distilled water; 20 to 30 parts of organic pigment; 10 to 30 parts of polymer resin; 15-25 parts of a pigment; 10 to 20 parts of mordant; 25-30 parts of a dispersant; the mordant comprises any one of lime water, alum or a sodium nitrite aqueous solution, and after the mordant is dissolved in water, the solute mass concentration range of the mordant is 30%-60%. The synthesis raw materials with chlorine groups, nitryl and sulfurous acid groups are selected, so that the activity of diazonium salt is high, later coupling is facilitated, meanwhile, after the organic pigment is formed through coupling, due to the fact that the sulfurous acid groups have high electrophilicity, the performance of the synthesized azo bonds is stable, and the organic pigment can be obtained. The stability of the pigment is enhanced, the defects that the pigment is poor in light fastness, poor in color brightness and extremely prone to being influenced by the external environment in the actual use process are overcome, and the weather resistance, light blocking capacity and weather resistance of the organic pigment are indirectly enhanced.

Description

technical field [0001] The invention relates to the technical field of organic pigments, in particular to a highly weather-resistant organic pigment and a manufacturing method thereof. Background technique [0002] Organic pigments refer to insoluble organic substances, which are usually added to the substrate in a highly dispersed state to color the substrate. The fundamental difference between it and dyes is that dyes can be dissolved in the dyeing medium used, while pigments are neither soluble in the medium in which they are used. Also insoluble in colored substrates. [0003] But existing organic pigment has following deficiency: [0004] First, this kind of organic pigment has low surface energy and strong hydrophobicity. It is difficult to infiltrate in water without adding additives, let alone achieve uniform dispersion in water. [0005] Second, this organic pigment has disadvantages such as poor strong acid and alkali resistance and poor light fastness. These sho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B67/20C09D7/41
CPCC09B67/006C09B67/0084C09D7/41
Inventor 黄鹏陈权弟余江洋何文武何江龙
Owner 江西隆源化工股份有限公司
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