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Inorganic nano protective coating, preparation method thereof and aluminum strip anticorrosive coating

A protective coating, inorganic nanotechnology, applied in anti-corrosion coatings, coatings, etc., can solve the problems of thickness fluctuation range, poor anti-corrosion protection effect, etc., to achieve the effect of improving aesthetics, small thickness fluctuation and reducing cost

Inactive Publication Date: 2021-05-25
深圳博林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

[0003] The invention provides an inorganic nano-protective coating and its preparation method as well as an anti-corrosion coating for aluminum strips, aiming to solve the problems that the existing coatings for aluminum strips have poor anti-corrosion protection effect and affect the appearance due to the large fluctuation range of thickness

Method used

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  • Inorganic nano protective coating, preparation method thereof and aluminum strip anticorrosive coating
  • Inorganic nano protective coating, preparation method thereof and aluminum strip anticorrosive coating
  • Inorganic nano protective coating, preparation method thereof and aluminum strip anticorrosive coating

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preparation example Construction

[0036] According to the first aspect of the embodiments of the present invention, there is provided a method for preparing an inorganic nano protective coating, which is applied to an anodized aluminum strip, including the following steps 1-4.

[0037] Step 1: Add a polar alcohol solvent with a mass ratio of 10%-25% into the first reaction kettle, start the stirrer and stir slowly; wherein, the stirring rate is 500rpm-800rpm.

[0038] Specifically, the polar alcohol solvent includes at least one of the following: ethanol, isopropanol, n-butanol, methanol, and ethylene glycol.

[0039] Step 2: Take 15%-75% silane without additional functional groups in mass ratio and add it to the first reaction kettle in a stirring state, continue stirring for 25-35min to obtain mixture A (will contain polar alcohols, silane The precursor of its reaction product is called mixture A); wherein, the stirring rate is 500rpm-800rpm.

Embodiment

[0051] Take isopropanol solvent with a mass ratio of 20% and add it to the first reaction kettle, start the mixer and stir slowly at a rate of 600rpm; take 20% n-octyltriethoxysilane and 20% γ-shrinkage Glyceryl ether oxypropyltrimethoxysilane was sequentially added into the first reaction kettle in a stirring state, and the stirring was continued at 600 rpm for 30 min to obtain a mixture A. Take acidic silica sol with a mass ratio of 85% and deionized water with a mass ratio of 10%-20% into the second reaction kettle in turn, start stirring at a rate of 600rpm, and use 0.1mol / ml hydrochloric acid solution to the second reaction The pH of the mixture in the kettle was adjusted to 2.5-3 to obtain mixture B. Add mixture B to mixture A in a stirring state according to the component 1:3, when the temperature rises to 60°C-70°C, use external cooling water to cool the temperature to 18°C-25°C for 12 hours to obtain inorganic nano-protection coating. The inorganic nano protective c...

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Abstract

The invention discloses a preparation method of an inorganic nano protective coating, which comprises the following steps: adding a polar alcohol solvent with the mass ratio of 10-25% into a first reaction kettle, and starting stirring; adding 15-75% by mass of silane without additional functional groups into a first reaction kettle, and continuously conducting stirring to obtain a mixture A; adding 50%-100% by mass of a sol aqueous dispersion and 10%-20% by mass of deionized water into a second reaction kettle, and adjusting the pH value to 2.5-3 by using a 0.1 mol / ml hydrochloric acid solution to obtain a mixture B; and adding the mixture B into the mixture A according to the component ratio of (1:4)-(1:2), conducting cooling to 18-25 DEG C by using external cooling water, and continuing for 10-15 hours to obtain the inorganic nano protective coating. According to the invention, silane and a polar alcohol solvent are subjected to a sol-gel reaction to form the inorganic nano protective coating with stronger cross-linking density with an anodic aluminum oxide strip, so that the hardness and the wear resistance are improved, the thickness is only 2-4 microns, the dosage is greatly reduced, and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to an inorganic nano protective coating, a preparation method thereof and an anti-corrosion coating for aluminum strips. Background technique [0002] The exterior aluminum strips on the market today are all anodized and powder coated on top of them for anti-corrosion protection. However, powder coatings cannot fully achieve the long-term protection effect under extreme conditions, resulting in more or less white corrosion (such as easily visible white spots, white spots) on the aluminum strips of passenger cars in hot and humid weather in southern China. Reduce the service life, value preservation and aesthetics of passenger cars. In addition, the existing automotive exterior aluminum strips cannot meet the highest standards of VW / Audi TL 182 and GMW 14665, and the thickness of the powder coating is difficult to control, reaching about 70um to 90um, and the thickness fluctuates i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D5/08C09D183/06
CPCC09D1/00C09D5/08C09D183/06
Inventor 吕博
Owner 深圳博林新材料科技有限公司
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