Self-cleaning coating and preparation method thereof

A self-cleaning and coating technology, applied in the direction of polyester coatings, coatings, etc., can solve problems such as unusable, weak effect, and unsatisfactory effect

Inactive Publication Date: 2010-09-01
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of this self-cleaning glass is imported, the price is relatively expensive, and because titanium dioxide has a strong dependence on sunlight, it can only show good superhydrophilicity under the irradiation of a certain intensity of sunlight, so in Less effective when the sun is low
Moreover, due to the strong oxidizing ability of titanium dioxide, it cannot be used on the surface of many organic coatings.
This limits the

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Coating preparation: select 13nm α-nano-alumina particles, fix the mass ratio of alkyd varnish and alumina nanoparticles to 1:0.01, the ratio of G-502 to alkyd varnish is 10:100, and the dispersant accounts for 0.3% of the total weight of the mixed solution %, the above-mentioned substances were mixed, stirred for 6h, and the stirring speed was 2000r / min.

[0012] Construction: Mix the obtained paint and diluent according to the volume ratio of 1:2, stir evenly, and spin coat to form a film. The average visible light transmittance of the obtained composite film is 88.0%, and the contact angle is about 141°±2°. When the volume of the water droplet is 10ul and the surface inclination angle is 9°, the droplet can slide down automatically.

Embodiment 2

[0014] Coating preparation: select 13nm α-nanometer alumina particles, fix the mass ratio of alkyd varnish to alumina at 1:0.01, the ratio of G-502 to alkyd varnish is 36:100, and the dispersant accounts for 0.3% of the total weight of the mixed solution , Mix the above materials and stir for 6h at a stirring speed of 2000r / min.

[0015] Construction: fix the volume ratio of alkyd varnish and diluent to 1:2, the average visible light transmittance of the obtained film is 87.0%, the static contact angle is about 147°±2°, when the volume of water droplet is 10ul, the surface is inclined When the angle is about 6°, the droplet can slide down automatically.

Embodiment 3

[0017] Coating preparation: select 13nm α-nano-alumina particles, fix the mass ratio of alkyd varnish and alumina to 1:0.01, the ratio of G-502 to alkyd varnish is 60:100, and the dispersant accounts for 0.3% of the total weight of the mixed solution. The above materials were mixed and stirred for 6h at a stirring speed of 2000r / min.

[0018] Construction: According to the volume ratio of alkyd varnish and diluent as 1:2, the average visible light transmittance of the obtained film is 86.3%, and the static contact angle is about 153°±2°. When the volume of water droplets is 10ul, the surface is inclined When the angle is about 4°, the droplet can slide down automatically.

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PUM

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Abstract

The invention discloses a self-cleaning coating and a preparation method thereof. The self-cleaning coating comprises an alkyd resin varnish, nano-alumina particles, a low surface energy drainage assistant, a high-efficiency oil dispersant AHH and a diluent, wherein the alkyd resin varnish is the common varnish in the market; the particle diameter of the nano-alumina particles is between 13 and 200nm; the mass ratio of the alkyd resin varnish to the nano-alumina particles is 1:0.05-0.01; the mass ratio of the drainage assistant to the alkyd resin varnish is 10-60:100; and the content of the high-efficiency oil dispersant is 0.1 to 0.6 percent of the total mixture mass. During preparation, the raw materials are mixed and stirred, wherein the stirring speed is over 2,000 revolutions per minute, and the stirring time is over five hours. The self-cleaning coating has the advantages of convenient use, and the prepared thin film has better transmittance, and has a tawny color and the function of beautifying.

Description

technical field [0001] The invention relates to a paint with self-cleaning effect and a preparation method thereof. The paint can be used on the surface of glass, wood or metal, and can simultaneously achieve antifouling, moisture-proof, wear-resistant and other effects, and belongs to the field of surface physics and chemistry. Background technique [0002] According to the statistics of China Chemical Industry Network, in the first two months of 2009, my country's paint production increased by 13.3%, and the annual output reached 5 million tons. Mainly due to insufficient research and development efforts. At present, the research and development of some functional coatings is relatively mature, including: wear-resistant coatings, fire-resistant coatings, waterproof coatings, weather-resistant coatings, decorative coatings, etc. However, with the complexity of the social environment, the demand for functional coatings is becoming more and more extensive, and some new needs ...

Claims

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Application Information

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IPC IPC(8): C09D167/08C09D7/12
Inventor 王波常艳丽李耳张雪红宋雪梅王如志张铭侯育冬朱满康汪浩严辉
Owner BEIJING UNIV OF TECH
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