Anti-ultraviolet and anti-aging powder coating added with nano titanium dioxide

Abstract

The invention discloses an anti-ultraviolet and anti-aging powder coating added with nano titanium dioxide. The powder coating is prepared from the following raw materials: 52-54 parts of hydroxy polyester resin, 7-8 parts of fluorocarbon resin, 4-5 parts of triglycidyl isocyanurate, 13-15 parts of nano-aluminum oxide, 0.8-0.9 part of perfluorooctyl triethoxysilane, 25-30 parts of an ethanol solution with the concentration of 75wt%, 0.5-0.6 part of a silane coupling agent kh560, 15-17 parts of rutile type nano titanium dioxide, 0.2-0.25 part of an aluminum coupling agent F1, 3-4 parts of extinction micronized wax, 0.8-1 part of amorphous silica, 1.5-2 parts of carboxymethyl cellulose, 4-5 parts of low-melting glass powder and a proper amount of deionized water. In the preparation of the powder coating, the aluminate coupling agent-modified rutile type nano titanium dioxide is additionally added, so that the weatherability and the hydrophobicity are improved; the powder coating is used for corrosion protection of an outside pump valve, and has an excellent anti-aging effect.

Description

Technical field [0001] The invention relates to the technical field of coatings, in particular to a powder coating with nanometer titanium dioxide added to resist ultraviolet aging. Background technique [0002] In recent years, the application of powder coatings has surpassed water-based coatings and high-solid coatings in the coatings industry, and has become one of the most widely used coatings in the industry. The powder coating process solves the problems of flammability, explosion and environmental pollution in the traditional paint coating process, and its coating has superior performance, the raw materials can be recycled and reused, and the coating process is simple. It can be widely used in the coating of pumps and valve shells. Because the pump valve is a casting or forging, its surface is rough. The existing functional powder coating technology for valve surface treatment still has certain defects, causing the coating to appear shrinkage, pinholes and serious orange ...

AI Technical Summary

Problems solved by technology

Since the pump valve is a casting or forging, its surface is rough. At present, there are still some defects in the functional powder coating technology for valve surface treatment in the existing technology, which leads to defects such as shrinkage cavities, pinholes and severe orange peel in the coating, which in turn leads to The application of pump valves in special fields such as food, biology, pharmaceuticals, chemicals, aerospace and electronics is limited

Moreover, most of the pump valves will be used in high water content, high sand content, strong corrosion medium environment and other factors, which will aggravate the corrosion of the pump valve and make it easier to scale on the pump valve, resulting in short service life of the pump valve and short inspection cycle. , The problem of heavy workload brings inconvenience to the use. The general surface strengthening process mainly includes metal coating, ceramic coating and other coatings. Although the wear is slowed down to a certain extent and the corrosion resistance is improved, they all exist. Disadvantages: the metal coating is easy to delaminate and cause shedding; ceramics have poor impact resistance and are prone to cracking; some polymer coatings have poor mechanical and thermal properties, etc.