Self-cleaning coating and preparation method thereof

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 ...

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 current use of this type of self-cleaning glass

[0004] In 2009, a product that uses a super-hydrophobic surface to achieve self-cleaning effect also appeared on the market. This product belongs to the water-based polyurethane series interior wall latex paint, but the effect is not very satisfactory. After the water drops on the surface, it must be wiped twice to achieve Cleaning effect, and the price is relatively expensive