A kind of organosilicon super-weather-resistant anti-cracking anti-corrosion coating

Abstract

The invention discloses an organic silicon-containing super-weather-resistant type anti-cracking and anti-corrosion coating, which is prepared from the following raw materials: 100 parts of organic silicon elastic resin, 10-20 parts of fumed silica powder subjected to surface treatment, 5-15 parts of rutile type TiO2 subjected to surface treatment, 10-20 parts of zinc phosphate, 10-15 parts of aluminum tripolyphosphate, 3-5 parts of precipitated barium sulphate, 5-10 parts of mica powder, 2-5 parts of talcum powder, 5-10 parts of glass fibers, 15-20 parts of hydroxyl silicone oil, 1-10 parts of pigment, 3-10 parts of a crosslinking reaction agent, 0.5-2 parts of a coupling agent and 0.05-0.1 part of a catalyst. The super-weather-resistant type anti-cracking and anti-corrosion coating not only has excellent weather resistance so as to be long in service life, but also has good elasticity so as to overcome the coating cracking behavior caused by thermal expansion and cold contraction deformation of a metal base material under temperature gradient; furthermore, the coating also has excellent corrosion resistance, hydrophobicity and environmental friendliness.

Description

technical field [0001] The invention relates to the technical field of production of architectural anticorrosion coatings, in particular to an organosilicon super-weather-resistant anti-cracking anticorrosion coating. Background technique [0002] In terms of metal corrosion protection, the use of anti-corrosion coatings has always been one of the most economical and effective means in modern industry. In recent years, as the use environment of steel structures has become more and more harsh, strong acid-base environment, high salt spray environment, high temperature difference environment and high humidity environment have all put forward severe tests on the use effect and life of traditional anti-corrosion coatings. Especially in high latitudes and coastal areas, where the temperature difference between day and night and the four seasons are large, the steel structure will continue to expand and recover under the repeated temperature gradient, which will cause the anti-cor...

AI Technical Summary

Problems solved by technology

Ordinary alkyd, acrylic and epoxy anti-corrosion coatings have a small linear expansion coefficient, which will inevitably lead to cracks in the coating under the long-term thermal expansion and contraction of the base material, and the cracking of the coating will lead to the failure of the anti-corrosion effect

[0003] There are many forms of coating failure, but the failure mode of cracking and peeling will cause the coating to completely lose its protective effect on the substrate

Although there have been patent reports for the preparation of anti-cracking coatings containing isocyanates and their modified resins, due to the strong toxicity, low boiling point, and strong corrosion of isocyanates, there are likely to be safety hazards in the process of coating preparation and construction. Hidden dangers, serious environmental pollution and great harm

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