Boron-modified organic silicon resin zinc-aluminum composite coating and preparation method thereof

Abstract

The invention discloses a boron-modified organic silicon resin zinc-aluminum composite coating. The boron-modified organic silicon resin zinc-aluminum composite coating comprises the following components in parts by mass: 45-48 parts of boron-modified organic silicon resin, 35-45 parts of heat-resistant pigments and fillers, 10-15 parts of polyarylether sulphone ketone modified resin, 15-25 parts of silicon carbide micro powder, 15-20 parts of graphite fluoride, 30-35 parts of a silane coupling agent and 2-4 parts of aids, wherein the boron-modified organic silicon resin is boric-acid-modified organic silicon resin or epoxy-modified silicon-boron resin; the polyarylether sulphone ketone modified resin comprises the following components in parts by mass: 40-70 parts of epoxy resin and 20-35 parts of polyarylether sulphone ketone; the particle size of the silicon carbide micro powder is 6 microns; the particle size of graphite fluoride is 5-10 microns; the heat-resistant pigments and fillers comprise nanosilicon dioxide, barrier function fillers and aluminite powder according to a mass ratio of 1.5 to 1 to 1. The invention also provides a preparation method of the boron-modified organic silicon resin zinc-aluminum composite coating.

Description

technical field [0001] The invention relates to the field of production and manufacture of composite coatings, in particular to a boron-modified organosilicon resin zinc-aluminum composite coating and a preparation method thereof. Background technique [0002] The surface of the metal structure exposed to the wild environment is very easy to corrode due to chemical and electrochemical interactions with the surrounding environment. Therefore, it is necessary to coat the surface with an anti-corrosion layer to protect the main body of the metal structure from corrosion. However, when the performance of the anti-corrosion coating material on the surface of the metal structure is poor and damaged, the metal structure body will also be exposed to rust. [0003] Using traditional anti-rust paint coating, the anti-rust paint film cannot completely prevent the penetration of hydrated oxygen in the air, and the polymer paint material has "aging phenomenon", which leads to cracks, bub...

AI Technical Summary

Problems solved by technology

However, when the performance of the anti-corrosion coating material on the surface of the metal structure is poor and damaged, the metal structure body will also be exposed to rust.

[0003] With traditional anti-rust paint coating, the anti-rust paint film cannot completely prevent the penetration of hydrated oxygen in the air, and the polymer paint material has "aging phenomenon", which leads to cracks, bubbling and pulverization of the paint layer; If there are cracks and peeling in the layer, the surface of the steel structure will be corroded and spread rapidly; the use of cathodic protection or environmental control to reduce atmospheric humidity requires special detection and control devices, which require long-term maintenance and high maintenance costs; Plating and electroplating methods not only have high cost, low efficiency, and serious pollution, but also the steel structure size is limited by the plating tank, which is not suitable for large steel structures

[0004] In the face of the development trend of "low carbon" in the future, the silicone high-temperature resistant coating industry has actually been prepared; in recent years, the coating industry has been committed to the development of low pollution, high solids or solvent-free (including powder, light curing) coatings, water Coatings (organic silicon high-temperature resistant paint); development of anti-fouling technology and anti-fouling coatings with low environmental risks; development of non-lead and chromium anti-rust pigments and their substitutes; development of clean production processes for titanium dioxide and iron oxide pigments; in addition, recent New coatings such as glass energy-saving coatings, radiation cooling coatings, sun-proof and heat-insulating coatings, high-temperature-resistant sealing coatings, high-efficiency anti-fouling solar heat-absorbing coatings, etc., have also brought new opportunities for the coatings industry on the "low-carbon" road. Opportunities for development, but there are still deficiencies in the weather resistance, especially corrosion resistance, of high temperature resistant coatings for higher temperatures such as coatings above 600 degrees