Organosilicone hybrid and organosilicone composite paint and preparations thereof

Abstract

The invention provides an organosilicone hybrid and an organosilicone composite paint and preparations thereof. The preparation method of the organosilicone hybrid is simple, in the prepared organosilicone hybrid, an interpenetrating network is formed by interlaced organic chains and SiO-Si, and organic chains containing C-C double band are introduced in the molecular structure. Based on this, the organosilicone composite paint is successively prepared by using the organosilicone hybrid with the advantages of simple preparation method environmental protection and easy obtainment of the used raw materials. Because of the structural characteristics of the organosilicone hybrid, the organosilicone composite paint provided by the invention correspondingly has high strength, high temperature resistance, tenacious paint film, good weather resistance, good film forming property, quick drying performance at normal temperature, UV-curable property, etc., and has a wide application prospect.

Description

technical field [0001] The invention belongs to the field of high-temperature-resistant coatings, and in particular relates to a preparation method of an organosilicon hybrid and an organosilicon composite coating. Background technique [0002] High temperature-resistant coatings refer to coating materials that can keep the paint film from discoloration, peeling off and maintain appropriate physical and mechanical properties at temperatures above 200 °C. High temperature resistant coatings are widely used in chimneys, high temperature steam pipes, heat exchangers, high temperature furnaces, petroleum cracking equipment, engine parts and exhaust pipes and other fields. There are many types of high-temperature resistant coatings, but inorganic high-temperature resistant coatings and organic heat-resistant coatings are the most common. Inorganic high-temperature resistant coatings have high hardness and good high-temperature resistance, but the paint film is brittle, poor in fl...

AI Technical Summary

Problems solved by technology

Among them, heterocyclic polymer high-temperature-resistant coatings have been used for many years at home and abroad, mainly for high-temperature insulation, but they are expensive, poor in storage, and have strict requirements on pigments.

Among elemental organic polymer high-temperature resistant coatings, organic fluorine coatings have superior high-temperature resistance, but they are not easily dissolved in solvents. Even if they are dissolved, their solid content is low, the film is thin, and construction is inconvenient. Ideal; the development of organic titanium coatings is late, the preparation is complicated, the application range is not wide, and many technologies are immature; since the industrialization of organic silicon polymers in the early 1940s, because the surface of the polymer is rich in Si-O-Si High bond energy enables silicone to have good high temperature resistance, and has developed into the most widely used organic high temperature resistant coating

[0003] At present, the general-purpose silicone resins of existing brands at home and abroad, especially the commercial silicone resins used for coatings and impregnating varnishes, mostly have disadvantages such as high curing temperature and weak adhesion of the cured paint film to the substrate.

Some grades of silicone resins cured at low temperature mainly rely on external crosslinking agents to strengthen the curing reaction during construction, and as a result, the heat resistance of the cured silicone resin is reduced

The patent with the publication number CN 101531761A and titled "Preparation Method of High-curing Activity High-temperature Resistant Silicone Resin" discloses a 500°C high-temperature-resistant coating made of pure silicone resin plus pigments and fillers. In addition, There are also domestically produced silicone epoxy modified resins, 1053 silicone resins, and GT-5R heat-resistant coatings. These coatings need to add several mixed curing agents when used, and the surface drying time is long; It can be dried by baking for 2 hours under the same conditions, and the practicability is not good; and the cost of high temperature resistant coating is relatively high, and the energy consumption in the process of production and use is relatively large

It can be seen that the main disadvantage of the high temperature resistant coating prepared by using the existing silicone resin is that high temperature curing is required, and the high temperature curing time is long, and the adhesion to the substrate is poor.

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