Preparation method of modified pigment yellow 12

A pigment yellow and modification technology, applied in the direction of organic dyes, etc., can solve the problems of secondary aggregation of composite pigment particles, and achieve the effect of preventing secondary aggregation.

Active Publication Date: 2014-04-09
TIANJIN URBAN CONSTR COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the particle size of the inorganic core is small, the composite pigment particles also undergo secondary aggregation during the preparation process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] The preparation method of modified pigment yellow 12 of the present invention makes full use of the surface dispersion of rosin, silica gel (m-SiO 2 ) high adsorption performance and uniform particle size distribution characteristics, prepared m-SiO 2 It is an inorganic-organic composite modified pigment yellow 12 that combines firmly with organic pigment particles, has uniform particle size distribution and excellent performance.

[0023] The preparation method of modified pigment yellow 12 of the present invention is to add silica gel (m-SiO2) in the preparation process of pigment yellow 12 2 ) and rosin to modify Pigment Yellow 12, including the following steps:

[0024] (1) Activation treatment of silica gel: take 120-200 parts of column chromatography silica gel with a particle size of 100-200 mesh, put them into a beaker, place the beaker in an oven, and dry at a temperature of 100-120°C for 3-5 hours , cooled in a desiccator to obtain activated silica gel for u...

Embodiment 1

[0030] Take the preparation of modified pigment yellow 12 with a silica gel addition of 10% and a rosin soap solution addition of 5% as an example:

[0031] Weigh 80g of silica gel and put it into a beaker, place the beaker in an oven, dry at 100°C for 3 hours, and cool in a drying oven to obtain activated silica gel, which is ready for use.

[0032] Take 50mL of water, 3.6g of 30% hydrochloric acid solution, add 3.6g of 3,3-dichlorobenzidine under stirring, continue stirring for 3min, add 0.4g of aminotriacetic acid, raise the temperature to 90°C, stop heating, stir and cool to 40°C ℃, and then add 6.4 g of 30% hydrochloric acid, and cool down to 0 ℃. Then add 6.4g of 30% sodium nitrite solution for diazotization reaction. The reaction process is completed within 2 minutes. After the reaction is completed, dip it with starch potassium iodide test paper. The starch-potassium iodide test paper is light blue; 0.5 g of activated carbon, 0.4 g of sulfonated castor oil and stirred...

Embodiment 2

[0036] Take the preparation of modified pigment yellow 12 with a silica gel addition of 15% and a rosin soap solution addition of 10% as an example:

[0037] Weigh 100g of silica gel and put it into a beaker, place the beaker in an oven, dry at 110°C for 4 hours, and cool in a drying oven to obtain activated silica gel for use.

[0038] Take 50mL of water, 3.9g of 30% hydrochloric acid solution, add 4g of 3,3-dichlorobenzidine under stirring, continue stirring for 3min, add 0.4g of aminotriacetic acid, raise the temperature to 90°C, stop heating, stir and cool to 40°C , then add 7.7 g of 30% hydrochloric acid, and cool down to 0°C. Then add 7g of 30% sodium nitrite solution for diazotization reaction. The reaction process is completed within 2min. After the reaction is completed, dip it with starch potassium iodide test paper. Activated carbon, 0.5g sulfonated castor oil, stirred for 5min, the solution was suction filtered to remove the activated carbon, and a tetrazide solut...

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Abstract

The invention provides a preparation method of modified pigment yellow 12. In a preparation process of pigment yellow 12, silica gel (m-SiO2) and rosin are added; the surface dispersion surface of rosin, and the high adsorption performance and the granularity distribution uniform property of m-SiO2 are sufficiently utilized, so that prepared pigment grains can be firmly combined on the surface of m-SiO2 to form an organic-inorganic composite pigment; and the granularity distribution of obtained composite pigment grains is intensive, so that the performance of pigment yellow 12 is improved. The preparation method provided by the invention has the effects that modified pigment yellow 12 obtained by a modified preparation method is the organic-inorganic composite pigment, the grain diameter is small and the granularity distribution is intensive. Compared with a standard product, the chromatic light is strong, the coloring capability is improved by 5-10%, the transparency is improved by 10-15% and the heat resistance is improved by 5-10 DEG C.

Description

technical field [0001] The invention belongs to the preparation of pigments in fine chemical products, in particular to a preparation method of modified pigment yellow 12. Background technique [0002] Organic pigments are widely used in coatings, inks, paints, leather, rubber, plastics, latex products, building materials, and cosmetics. In recent years, they have been used as functional organic pigments because of their special application properties, such as photoelectricity and catalytic properties. Among organic pigments, benzidine pigments account for more than 1 / 4 of the organic pigment market, and are an important class of organic pigments. However, this kind of pigments, like ordinary organic pigments, also has deficiencies in light fastness, weather resistance, hiding power and production cost, and it is difficult to meet the requirements of use. Therefore, it is necessary to modify and modify organic pigments to improve pigments. performance. [0003] In order to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B67/20
Inventor 费学宁张勇曹凌云郝亚超
Owner TIANJIN URBAN CONSTR COLLEGE
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