Method for preparing aqueous coating with automatic cleaning function

Abstract

The invention relates to the field of aqueous coatings, and in particular relates to a method for preparing an aqueous coating with an automatic cleaning function. The aqueous coating is prepared from the following raw materials in parts by weight: 50-55 parts of water, 15-25 parts of polyvinyl alcohol, 20-23 parts of acrylic acid resin, 5-8 parts of dioctyl phthalate, 10-15 parts of modified titanium dioxide nanotubes, 1-5 parts of an organic silicon defoaming agent, 10-12 parts of triethanolamine, 0.2-0.5 part of a silane coupling agent KH570 and 0.1-0.5 part of lauryl sodium sulfate. The aqueous coating provided by the invention has a self-cleaning function, is easy to clean, is capable of adsorbing toxic and harmful gases adhered to the surface of the coating under the action of photocatalysis, is high in photocatalysis, long in service life and good in adhesion property, and environment pollution can be reduced. The aqueous coating is only prepared from alcoholic solvents with very low toxicity, process environment conditions can be improved, and the aqueous coating is simple in preparation method, wide in application range and applicable to popularization and large-scale production.

Description

technical field [0001] The invention belongs to the field of water-based paint, and in particular relates to a preparation method of a water-based paint with automatic cleaning function. Background technique [0002] Self-cleaning materials have been widely used in construction, glass, vehicles, fibers and other fields. Due to their good hydrophobic properties, self-cleaning materials can prevent the surface from being contaminated with dirt, and have the advantages of being green and environmentally friendly. Most of the self-cleaning coatings in the prior art are polyurethane-based coatings, and the purpose of self-cleaning is achieved by adding modifiers and anti-ultraviolet UV curing groups in the matrix. However, in the actual application of polyurethane-based coatings, there are a series of problems such as high requirements on the construction environment, easy peeling of the paint film, and serious harm to the environment and human body caused by the necessary benzen...

AI Technical Summary

Problems solved by technology

However, in the actual application of polyurethane-based coatings, there are a series of problems such as high requirements on the construction environment, easy peeling of the paint film, and serious harm to the environment and human body caused by the necessary benzene-containing substances in the additives. Therefore, at present, the use of water-based coatings is advocated in the coating field. as an alternative to polyurethane-based coatings

In the prior art, the existing self-cleaning water-based paint is coated with nano-titanium dioxide in the polymer by emulsion polymerization, but the water-based paint obtained by this method is hydrophilic after the surface is coated, and the self-cleaning effect is poor.