Method for preparing natural green nano inorganic material-modified organic pigment

A technology of nano-inorganic materials and organic pigments, applied in the direction of organic dyes, etc., can solve the problems of high cost, weak mutual adsorption, prolonging the process route, etc., to improve the covering power and color power, improve the bonding firmness, and shorten the process length. Effect

Inactive Publication Date: 2010-07-28
TIANJIN URBAN CONSTR COLLEGE
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Problems solved by technology

The surface modification method aims to deposit or coat single-molecule or multi-molecular-layer substances on the surface of pigment particles, including the use of surfactants, modifiers, derivatives of the pigment itself, etc., to change the properties of the pigment particles. performance, but the process is complicated and the cost is high
The inorganic hybrid method combines two or more materials to obtain new materials by combining the advantages of several materials. This method is simple in process but the intermolecular bonding is weak, and it cannot withstand high shear force and strong extrusion. force
Hidden pigment modification technology can be regarded as a new means to adjust the molecular structure in the process of pigment synthesis and finally change the shape of the pigment. Although this method can achieve excellent dispersion effect, the stability is poor. After heat trea

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preparation example Construction

[0024] The preparation method of the present invention utilizing natural green nano-inorganic materials to modify organic pigments is characterized in that: the natural green nano-inorganic materials are sepiolite, and the method comprises the following steps:

[0025] (1) Primary treatment of sepiolite: raw sepiolite is dried, pulverized, ball milled, and sieved through a 100-mesh sieve, then soaked in distilled water, washed, removed impurities, filtered and dried, then ball-milled, and then passed through a 400-mesh sieve. sieve;

[0026] (2) Sepiolite modification: Stir the treated sepiolite in step (1) evenly with distilled water, and dropwise add 5% to 10% HCl solution five times the quality of the primary treated sepiolite to carry out acidification reaction , and heated at a temperature of 80°C to 90°C, stirred for 10 to 24 hours, and then washed repeatedly with distilled water until there is no chloride ion in the sepiolite, forming a fiber tube with 20 to 400nm in on...

Embodiment 1

[0037] Modified preparation of organic pigment C.I. Pigment Red 21 (12300) red powder:

[0038] The raw sepiolite ore is dried, pulverized, ball milled, passed through a 100-mesh sieve, then soaked in distilled water, washed to remove impurities, filtered and dried, then ball-milled and passed through a 400-mesh sieve. Stir the primary treated sepiolite evenly with distilled water, dropwise add 9% HCl solution 5 times the mass of the primary treated sepiolite, heat at 80°C and stir for 12 hours, then repeatedly wash with distilled water until there is no chlorine in the sepiolite ions, and finally filter and dry the modified sepiolite, and grind it for later use;

[0039] According to the molar ratio of aniline, hydrochloric acid and sodium nitrite of 1:2.7:1.05, the diazotization reaction is carried out at 0-5°C. Add 12mL of water and 3.5mL of 30% hydrochloric acid into the beaker, stir and add 1.2mL of aniline (industrial pure), then add 11mL of water, and add a 30% aqueous...

Embodiment 2

[0043] Preparation of organic pigment C.I. Pigment Red 21 (12310) Jinguanghong by modification:

[0044] The preparation method is the same as that in Example 1, Turkey red oil is not added to the coupling component, and the diazonium salt is added to the coupling component within 10 minutes in the coupling reaction, and the stirring is continued for 3 hours. It is directly filtered, washed with water, and dried without acidification and heat preservation process to obtain The modified Jinguanghong containing 15% sepiolite has a yield close to the theoretical yield, a color strength equivalent to that of the original product, and improved heat resistance and water dispersibility.

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Abstract

The invention provides a method for preparing a natural green nano inorganic material-modified organic pigment. The natural green nano inorganic material is sepiolite; and the method comprises the following steps: initially treating the sepiolite; modifying the sepiolite; performing diazotization reaction; preparing a coupling agent and adding a pigment additive; and performing coupling reaction and pigmentation to obtain the modified azo organic pigment. The method has the advantages that: the natural green nano inorganic material sepiolite is added in the process of producing the organic pigment, so the pigment production and pigmentation are synchronously integrated, the color strength, the hiding power, the water dispersibility and the thermal stability of the azo organic pigment are improved, the cost is saved, the conventional production and modification process is shortened, and the method has good environmental benefit and economic benefit.

Description

technical field [0001] The invention belongs to the preparation of pigments in fine chemical products, in particular to a method for preparing organic pigments modified by natural green nano inorganic materials for original pigment products. Background technique [0002] Organic pigments are rich in varieties, complete in color spectrum and bright in color, and are widely used. However, most organic pigments have poor light resistance stability, heat resistance stability, solvent resistance, migration resistance, and hiding power. In use, there are often phenomena such as easy fading, easy floating, weak tinting strength, and poor water dispersibility, which are difficult to meet the requirements of use. Therefore, it is necessary to modify and modify organic pigments to improve the performance of pigments. [0003] The currently commonly used pigment modification methods or pigmentation methods include surface modification, inorganic hybridization, latent dye modification ...

Claims

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Application Information

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IPC IPC(8): C09B67/20
Inventor 费学宁刘玉茹张天永陈佳俊周立峰刘音曹凌云
Owner TIANJIN URBAN CONSTR COLLEGE
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