Silicone coating for high temperature insulation
At present, the more common high temperature insulation coatings are generally prepared by inorganic materials, because of the high temperature resistance, good bonding strength, low cost, small thermal expansion coefficient, excellent durability, no pollution to the environment and other advantages are widely used. The more commonly used types are silicate, phosphate and ceramics.
High temperature resistant organic heat insulation coatings are generally ablative heat insulation coatings. Its heat insulation principle is to use the resin decomposition to absorb heat and make the surface of the substrate temporarily maintain a low temperature; At the same time, the gas or carbon layer produced during decomposition also acts as a thermal insulation effect. This kind of coating has the advantages of short heat insulation time, thick coating, carbonization and gas generation during use, but the temperature resistance range is higher (up to 1800 ℃), and the heat insulation effect is obvious. Compared with the high temperature heat insulation coating prepared by inorganic materials, it has the advantages of low cost, easy construction and good mechanical properties. Common at present have epoxy resin, silicone resin, phenolic resin and polytetrafluoroethylene heat insulation coating.
Using liquid silazane prepolymer containing vinyl and polymercapto compound as matrix, and ceramic powder as filler, a kind of UV-curable ablation resistant coating was prepared. The linear ablation rate of oxyacetylene ablation was 0.252 mm/s, and the mass ablation rate was 61.7mg/s.

2.Silicone weather resistant coating
The main chain of organosilicon products is Si -- O, and there is no double bond, so it is not easy to be broken down by ultraviolet light and ozone. It has better heat resistance, radiation resistance and weather resistance than other polymer materials. The service life of organosilicon in the natural environment can reach several decades.
Silicone resin was synthesized by using several organosiloxanes, and then the epoxy resin was chemically modified by organosilicone resin, and silicone modified epoxy resin was prepared. Organic silicone modified epoxy resin can improve the adhesion of coating, impact resistance, heat resistance, weather resistance, etc., the modified organic silicone modified epoxy resin composite epoxy silicone resin and excellent performance, with its of the coating is very dense, has a good adhesion, high hardness and excellent flexibility.