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Preparation method of inorganic-organic composite yellow pigment

A yellow pigment, inorganic technology, applied in the direction of organic dyes, etc., can solve the problems of limited and unsatisfactory improvement of heat resistance and weather resistance of composite pigments, and achieve the effects of good light stability, pure color tone, and good pigment performance.

Active Publication Date: 2015-12-30
浙江永合新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of these composite pigments still use organic pigments as the main body, showing more characteristics of organic pigments, which limits the effect of improving heat resistance and weather resistance of composite pigments, and still cannot meet the requirements of replacing inorganic pigments.

Method used

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Examples

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Effect test

preparation example Construction

[0017] The preparation method of the inorganic-organic composite yellow pigment of the present invention is to add a certain proportion of white carbon black / titanium dioxide to the coupling components in the process of preparing C.I. pigment yellow 13 and 83 composites by the mixed coupling method The inorganic mixture is used as the inorganic main body. When the tetrazide salt solution is added, it reacts with the coupling component to form an organic pigment. First, the silica with a good pore structure is coated to obtain a coated composite pigment particle. Then, the pore structure is poor. The titanium dioxide is combined with the coated composite pigment particles through electrostatic adsorption, so as to obtain an inorganic-organic composite yellow pigment with a special structure. Thus, an inorganic-organic composite yellow pigment mainly composed of inorganic substances is prepared. With inorganic substances as the main body, the prepared composite yellow pigment sh...

Embodiment 1

[0028] The yellow composite pigment (Hybrid-4 / 1, Hybrid-Si 3 / Ti 1 ) as an example, where AAMX:IRG=80:20

[0029] Weigh 2.5g of NaOH and dissolve it in 60mL of water, add 4.1g of acetoacetyl-2,4-dimethylaniline (AAMX) and 2,5-dimethoxy-4-chloroacetoacetanilide to it under magnetic stirring conditions (IRG) 1.05g, dissolved at room temperature until there are no obvious large particles of insoluble matter in the solution. Then the reaction solution was transferred to a 1L four-necked bottle, and 24g of precipitated white carbon black, 8g of titanium dioxide, 1.5g of red oil, and 5-6 drops of toluene were added thereto under mechanical stirring, and 6mL of acetic acid was added thereto after stirring for 10min. Acid analysis, pending reaction.

[0030] Measure 40mL of water, add it to a beaker, add 2.6mL of concentrated hydrochloric acid to it under stirring conditions, weigh 3.0g of DCB, and add it to the solution, stir at room temperature for 5min to obtain an aromatic amin...

Embodiment 2

[0033] Take the yellow composite pigment (Hybrid-3 / 1) with an inorganic / organic mass ratio of 3:1 and a silica / titanium dioxide mass ratio of 3:1 as an example

[0034] The amount of white carbon black in Example 1 is adjusted to 18g, the amount of titanium dioxide is adjusted to 6g, the amount of other raw materials is constant, and the reaction conditions are constant, so that the inorganic / organic mass ratio is 3:1, and the white carbon black / titanium dioxide Yellow composite pigment Hybrid-3 / 1 with a mass ratio of 3:1.

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Abstract

The invention provides a preparation method of an inorganic and organic composite yellow pigment. The preparation method comprises the following steps: in a preparation process of a C.I. pigment yellow 13 and 83 compound, adding an inorganic mixture of white carbon black / titanium dioxide in a certain proportion to prepare the inorganic and organic composite yellow pigment which takes inorganic matters as a main body. The preparation method comprises the following steps: preparing a coupling component; carrying out a tetra-nitriding reaction; and carrying out a coupled reaction. According to the preparation method provided by the invention, by using the inorganic and organic composite yellow pigment which takes inorganic matters as the main body, the prepared composite yellow pigment more shows characteristics of inorganic matters and has good heat stability and light stability. Compared with the inorganic yellow pigment lead chromate yellow, the prepared composite pigment shows more excellent coloring properties such as high coloring force, brighter color and purer yellow and the like and can become a potential substituent of the yellow inorganic pigment containing toxic heavy metals such as lead chromate yellow.

Description

technical field [0001] The invention belongs to the preparation technology of potential substitutes of inorganic pigments such as lead chrome yellow containing toxic heavy metals in chemical products, in particular a composite of C.I. pigment yellow 13 and 83 with white carbon black / titanium dioxide mixture as the inorganic main part The preparation method of the inorganic-organic composite yellow pigment which is an organic pigment part. Background technique [0002] Lead chrome yellow, an inorganic yellow pigment, is often used in warning paints, such as car paints and road marking paints, due to its strong hiding power, strong weather resistance and high visibility. However, studies have found that the large amount of blind use of inorganic pigments containing toxic heavy metals lead and chromium, such as lead chrome yellow, will bring heavy metal pollution to the ecological environment (LeGalley, et.al., 2013a, 2013b). With the deepening of awareness of the harm of heav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B67/22
Inventor 费学宁曹凌云赵洪宾张宝莲谷迎春
Owner 浙江永合新材料科技有限公司
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