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Preparation method of corrosion resisting UV aging resistant coating modified aluminum pigment

An anti-ultraviolet and corrosion-resistant technology, which is applied in the field of pigments, can solve the problems of shedding of the coating layer and pigments, difficulty in color fixation, etc., and achieve the effect of improving corrosion resistance

Active Publication Date: 2018-12-04
YIWU WADOU PICTURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It effectively improves the reflective ability of the pigment to near-infrared and ultraviolet light, but the polymer coating formed by the in-situ polymerization method fails to form a chemical bond with the pigment, and its essence is physical coating. The coating layer and the pigment fall off, making it difficult to achieve the purpose of color fixation

Method used

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  • Preparation method of corrosion resisting UV aging resistant coating modified aluminum pigment
  • Preparation method of corrosion resisting UV aging resistant coating modified aluminum pigment
  • Preparation method of corrosion resisting UV aging resistant coating modified aluminum pigment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] (1) Mix 12 g of aluminum powder and 100 mL of absolute ethanol, and disperse ultrasonically for 20 min to obtain a dispersed phase of aluminum powder.

[0050] (2) Mix 2mL of hydrochloric acid, 10mL of distilled water, 5mL of ether, 10mL of tetraethyl orthosilicate and 60mL of absolute ethanol, and stir at 40°C for 1 hour to reach a sol state.

[0051] (3) Slowly add the dispersed phase of aluminum powder into the sol, continue stirring at 40°C, add 12 mL of ammonia water drop by drop while stirring, and continue stirring for 3 hours to obtain Al / SiO 2 Mutually.

[0052] (4) Mix 15mL of aminopropyltriethoxysilane (KH-550) and 20mL of absolute ethanol, and add Al / SiO 2 phase, kept stirring for 2h, ended the reaction, poured it out, centrifuged, washed with absolute ethanol 3 times, and dried the product in a 50°C drying oven to obtain Al / SiO 2 / KH-550.

[0053] (5) Take 3g Al / SiO 2 / KH-550, slowly add 134mL of anhydrous toluene and 22.4mL of anhydrous triethylamine, ...

Embodiment 2

[0058] (1) Mix 12 g of aluminum powder and 100 mL of absolute ethanol, and disperse ultrasonically for 20 min to obtain a dispersed phase of aluminum powder.

[0059] (2) Mix 2mL of hydrochloric acid, 10mL of distilled water, 5mL of ether, 10mL of tetraethyl orthosilicate and 60mL of absolute ethanol, and stir at 40°C for 1 hour to reach a sol state.

[0060] (3) Slowly add the dispersed phase of aluminum powder into the sol, continue stirring at 40°C, add 12 mL of ammonia water drop by drop while stirring, and continue stirring for 3 hours to obtain Al / SiO2 Mutually.

[0061] (4) Mix 15mL of aminopropyltriethoxysilane (KH-550) and 20mL of absolute ethanol, and add Al / SiO 2 phase, kept stirring for 2h, ended the reaction, poured it out, centrifuged, washed with absolute ethanol 3 times, and dried the product in a 50°C drying oven to obtain Al / SiO 2 / KH-550.

[0062] (5) Take 3g Al / SiO 2 / KH-550, slowly add 134mL of anhydrous toluene and 22.4mL of anhydrous triethylamine, ul...

Embodiment 3

[0067] (1) Mix 12 g of aluminum powder and 100 mL of absolute ethanol, and disperse ultrasonically for 20 min to obtain a dispersed phase of aluminum powder.

[0068] (2) Mix 3mL of hydrochloric acid, 15mL of distilled water, 5mL of diethyl ether, 20mL of tetraethyl orthosilicate and 60mL of absolute ethanol, and stir at 40°C for 1 hour to reach a sol state.

[0069] (3) Slowly add the dispersed phase of aluminum powder into the sol, continue stirring at 40°C, add 15 mL of ammonia water drop by drop while stirring, and continue stirring for 3 hours to obtain Al / SiO 2 .

[0070] (4) Mix 25mL of aminopropyltriethoxysilane (KH-550) and 10mL of absolute ethanol, and add Al / SiO 2 phase, kept stirring for 2h, ended the reaction, poured it out, centrifuged, washed with absolute ethanol 3 times, and dried the product in a 50°C drying oven to obtain Al / SiO 2 / KH-550.

[0071] (5) Take 3g Al / SiO 2 / KH-550, slowly add 134mL of anhydrous toluene and 22.4mL of anhydrous triethylamine, ...

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Abstract

The invention relates to the pigment field, and discloses a preparation method of a corrosion resisting UV aging resistant coating modified aluminum pigment. The preparation method comprises followingsteps: utilizing a sol-gel method to prepare SiO2 coated Al particles, then utilizing a silane coupling agent to modify active hydroxyl groups on the surface of SiO2 coated Al powder to synthesize Al / SiO2 / silane coupling agent composite particles with an amino containing surface; then reacting part of amino groups with 2-bromoisobutyryl bromide to synthesize a composite particle initiator with bromine terminals, adjusting the ratio of composite to pigment molecules, carrying out substitution reactions between the other part of amino groups and melamine dye molecules to anchor the pigment molecules onto the surface of SiO2 particles, and finally generating the polymer coating aluminum pigment (Al / SiO2 / silane coupling agent / Br / dye / polymer) with a core-shell structure by an atom transfer radical polymerization method. The provided preparation method effectively improves the comprehensive performances of the aluminum pigment such as alkali resistance, acid resistance, UV resistance, and the like.

Description

technical field [0001] The invention relates to the field of pigments, in particular to a preparation method of a corrosion-resistant and anti-ultraviolet aging coated modified aluminum pigment. Background technique [0002] Digital inkjet printing is the latest printing technology that appeared internationally in the 1990s. Ink is one of the main consumables for digital inkjet printing and one of the main factors affecting the development of the digital inkjet printing industry. According to the different types of colorants, inkjet printing inks are divided into dye inks and pigment inks. Among them, pigment inks are versatile for various fabrics, the printing process is simple, less pollution, and has the advantages of significant energy saving and emission reduction. It is the current development of inkjet printing inks. main direction. But at present, the amount of pigment ink used in my country is relatively small, and most of them are foreign products. In addition, t...

Claims

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Application Information

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IPC IPC(8): C09C1/40C09C3/06C09C3/08C09C3/10C09C3/12
CPCC01P2006/62C01P2006/63C01P2006/64C09C1/40C09C3/006C09C3/063C09C3/08C09C3/10C09C3/12
Inventor 龚新明陈程华李小青徐斌
Owner YIWU WADOU PICTURE
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