Preparation method for super-hydrophobic coating

A super-hydrophobic coating and coating technology, applied in chemical instruments and methods, layered products, synthetic resin layered products, etc., can solve the problems of resin curing, long time, troublesome operation, etc., and achieve convenient construction and easy repair. , the effect of low cost

Active Publication Date: 2014-05-28
无锡市耐密特新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The strength of the coating prepared by the one-step method is not good, and the one-step method has the problem of resin curing, which leads to troublesome operation and a long time

Method used

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  • Preparation method for super-hydrophobic coating
  • Preparation method for super-hydrophobic coating
  • Preparation method for super-hydrophobic coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Step 1. Mix 9g of hydrophobic resin moisture-curable polyurethane with 3g of 500-mesh modified talcum powder particles, dissolve them in 6g of ethyl acetate as a solvent, and prepare coating solution I;

[0027] Step 2. Add 6g of methyltrimethoxysilane and 1g of ethyl orthosilicate to 100g of ethanol to form a mixed solution, add 30g of water to the mixed solution, and then add 10g to a concentration of 1×10 -3 mol / L oxalic acid aqueous solution was stirred for 10 minutes, and after standing for 3 hours, 10 g of 25% ammonia water was added, stirred for 10 minutes, and a superhydrophobic gel was obtained after standing for 15 hours. Take 10 g of the above-mentioned superhydrophobic gel, add 20 g of industrial pure ethanol, and ultrasonically treat it for 4 minutes, set the parameters of ultrasonic dispersion as frequency 20KHz, power 360W, and prepare coating solution II;

[0028] Step 3. Roll coating solution I on a 1×5 cm substrate glass slide. After 24 hours, coating...

Embodiment 2

[0030] Step 1. Mix 7.2g of hydrophobic resin fluorocarbon resin with 3g of 1000 mesh modified calcium carbonate particles, dissolve in 5.4g of butyl acetate as a solvent, and prepare coating solution I;

[0031] Step 2. Add 9g of methyltrimethoxysilane and 0.9g of ethyl orthosilicate to 98g of ethanol to form a mixed solution, add 30g of water to the mixed solution, and then add 9g to a concentration of 1×10 -3 mol / L oxalic acid aqueous solution was stirred for 10 minutes, and after standing for 3 hours, 9 g of ammonia water with a concentration of 26% was added, stirred for 10 minutes, and stood for 24 hours to obtain a superhydrophobic gel. Take 10g of the above-mentioned superhydrophobic gel, add 20g of industrial pure ethanol, and ultrasonicate for 4 minutes, set the parameters of ultrasonic dispersion as frequency 20KHz, power 360W, and prepare coating solution II;

[0032] Step 3. Roll coating the coating solution Ⅰ on a 1×5 cm substrate glass slide. After 24 hours, the ...

Embodiment 3

[0034] Step 1. Mix 9g of hydrophobic resin fluorocarbon resin with 3g of 1500 mesh modified talcum powder particles, dissolve in 1.5g of tetrahydrofuran as a solvent, and prepare coating solution I;

[0035] Step 2. Add 8g of methyltrimethoxysilane and 0.8g of ethyl orthosilicate to 96g of ethanol to form a mixed solution, add 30g of water to the mixed solution, and then add 8g to a concentration of 1×10 -3 mol / L oxalic acid aqueous solution was stirred for 10 minutes, and after standing for 3 hours, 8 g of ammonia water with a concentration of 27% was added, stirred for 10 minutes, and stood for 24 hours to obtain a superhydrophobic gel. Take 10g of the above-mentioned superhydrophobic gel, add 20g of industrial pure ethanol, and ultrasonicate for 4 minutes, set the parameters of ultrasonic dispersion as frequency 20KHz, power 360W, and prepare coating solution II;

[0036] Step 3. Roll coating solution I on a 1×5 cm glass slide. Coating solution I was cured at 270°C for 1 h...

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Abstract

The invention discloses a preparation method for a super-hydrophobic coating. The preparation method comprises the following steps: 1, mixing hydrophobic resin and modified particles, and dissolving the mixture in a solvent to prepare a solution I; 2, adding methyltrimethoxysilane and tetraethyl orthosilicate into alcohol to form a mixed solution, adding water into the mixed solution, adding an oxalic acid aqueous solution, stirring and standing, adding ammonia water, stirring and standing to obtain super-hydrophobic hydrogel, and performing ultrasonic treatment to prepare a solution II; 3, coating a substrate with the coating solution I in a spraying or rolling way, obtaining a coating I after the coating solution I is cured, dip-coating the surface of the coating I with a coating solution II, and obtaining a super-hydrophobic surface after the coating solution II is dried. According to the method, the problem of poor abrasion resistance of the super-hydrophobic coating is solved; in addition, the super-hydrophobic coating has the advantages of simplicity in repair and strong strength.

Description

technical field [0001] The invention relates to a hydrophobic coating, and more particularly to a method for preparing a hydrophobic coating. Background technique [0002] There have long been superhydrophobic surfaces in nature, such as lotus leaves and cabbage leaves. After careful study, scientists found that the surfaces of these plants are composed of micro-nano structures and low surface energy substances. It is the combination of these two that makes the plant surface super-hydrophobic. Since the contact area of ​​water droplets on the super-hydrophobic surface is very small, it can effectively inhibit the surface chlorination, corrosion, frost, current conduction and other phenomena. In addition, water droplets cannot stay stably on superhydrophobic surfaces. When the inclination angle is greater than 5 degrees, water droplets will roll off without leaving any traces. At the same time, it will take away the dust and dirt on the surface, so that the surface has a se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/06B32B27/18B32B27/40B32B27/30B32B27/28
Inventor 杨得全侯远
Owner 无锡市耐密特新材料有限公司
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