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Preparation method of double-layer coated water-based aluminum pigment

A double-layer coating and aluminum pigment technology, applied in the direction of coating, fibrous filler, ink, etc., can solve the problems of lack of reach, decrease of metal feeling on the surface of aluminum flakes, thickening of aluminum flakes, etc., and achieve small impact and water resistance Good performance, not easy to be destroyed

Active Publication Date: 2011-07-20
HEFEI SUNRISE PIGMENTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the metal feeling on the surface of the passivated coated aluminum sheet will be severely reduced, and the aluminum sheet will become thicker, which cannot meet the requirements of high-grade industrial coatings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1. Weigh 100g of atomized spherical aluminum powder and ball mill to obtain oily flaky aluminum powder with a particle size of 15μm, add the powder into a 250mL single-necked flask, then add 300mL of acetone solvent, and stir at a speed of 100r / min 1.5h, filter to obtain a filter cake with a solid content of 75%;

[0027] 2. Weigh 100g of the filter cake obtained in step 1, add it to a 1000mL three-neck flask, then add 320g of isopropanol and stir and disperse at 35°C for 0.5h, then use two constant pressure dropping funnels to drop the mixed solution a and the mixed solution at the same time B, wherein the mixed solution a is obtained after mixing 4.0 g of ammonia water with 25% by mass, 12 g of distilled water and 20 g of isopropanol, and the mixed solution b is obtained after mixing 20 g of tetraethyl orthosilicate and 20 g of isopropanol; after the dropwise addition is completed Stirring and reacting at 40°C for 6 hours, aging at room temperature for 8 hours, and th...

Embodiment 2

[0030] 1. Weigh 150g of atomized spherical aluminum powder and ball mill to obtain oily flake aluminum powder with a particle size of 15μm, add the powder into a 250mL single-necked flask, and then add 300mL of methyl ethyl ketone solvent, at a speed of 50r / min Stir for 1.5h, filter to obtain a filter cake with a solid content of 80%;

[0031] 2. Weigh 120g of the filter cake obtained in step 1, add it to a 1000mL three-neck flask, then add 280g of ethanol and stir to disperse at 25°C for 1 hour, then use two constant pressure dropping funnels to drop the mixed solution a and the mixed solution b at the same time, wherein Mixed solution a is obtained by mixing 6.0g of ammonia water with a mass percentage of 25%, 8g of distilled water and 20g of isopropanol; mixed solution b is obtained by mixing 12g of tetraethyl orthosilicate and 20g of isopropanol; Stirring and reacting for 6 hours, aging at room temperature for 6 hours, and then filtering to obtain a single-layer coated alu...

Embodiment 3

[0034] 1. Weigh 100g of atomized spherical aluminum powder and ball mill to obtain oily flaky aluminum powder with a particle size of 15μm, add the powder into a 250mL single-necked flask, and then add 300mL of cyclohexanone solvent, at a rate of 75r / min Stir at a rotating speed for 1.5 hours, and filter to obtain a filter cake with a solid content of 75%;

[0035] 2. Weigh 80g of the filter cake obtained in step 1, add it to a 1000mL three-neck flask, then add 300g of n-propanol and stir to disperse at 35°C for 0.5h, then use two constant pressure dropping funnels to drop the mixed solution a and the mixed solution at the same time b, wherein mixed solution a is obtained after mixing 2.0 g of ammonia water with 25% by mass, 10 g of distilled water and 20 g of isopropanol, and mixed solution b is obtained after mixing 16 g of tetraethyl orthosilicate and 20 g of isopropanol; after the dropwise addition is completed Stirring and reacting at 40°C for 6 hours, aging at room tempe...

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Abstract

The invention discloses a preparation method of a double-layer coated water-based aluminum pigment, which comprises the following steps: coating ethyl orthosilicate on lamellar aluminum powder to form a single-layer coated aluminum pigment; and under the action of an azo initiator, coating a hydrophilic ester monomer on the single-layer coated aluminum pigment to form the double-layer coated water-based aluminum pigment. The double-layer coated water-based aluminum pigment prepared by the method provided by the invention has the advantages of high coating tightness and favorable water resistance, and the coating layer can not be easily damaged. The organic layer on the outer layer is easily compatible with high-molecular rein in the paint, has favorable dispersity in the paint, and is mainly used in various water-based paints and water-based inks.

Description

1. Technical field [0001] The invention relates to a method for preparing water-based pigments, in particular to a method for preparing double-layer coated water-based aluminum pigments. 2. Background technology [0002] With the development of the economy and the improvement of living standards, people's awareness of environmental protection is gradually increasing, and the requirements for coatings are getting higher and higher. Not only are the products required to be beautiful and perform well, but also to be less polluting. Therefore, the improvement of the production process of aluminum pigments and the development of multi-functional, low-pollution, pollution-free, and dust-free aluminum pigments are the future development directions. [0003] Traditional metallic glitter paints are all solvent-based and have a high content of volatile organic compounds. Foreign countries have strict requirements on the volatilization of organic solvents. For example, coating is spe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/40C09C3/12C09D7/12C09D11/02C09D11/037
Inventor 张彩云董前年
Owner HEFEI SUNRISE PIGMENTS
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