What Is The Performance of High Temperature Resistant Powder Coatings?

High temperature resistant powder coating generally refers to the coating that does not change color, does not drop and can still maintain proper physical function when the film temperature is above 200 ℃. Generally, high temperature resistant powder coatings are mainly composed of high temperature resistant resin, high temperature resistant pigment, high temperature resistant filler and special additives; Because of its excellent high temperature resistance function, it is widely used in chemical industry, petroleum, metallurgy, aviation and other professions. At present, silicone powder coatings are still the main heat-resistant powder coatings.

1) Silicon oxygen bond is the main chain in the silicone resin. Because of its high bond energy, the silicone resin has high oxidation stability and can form a stable protective layer on the surface of the film. When silicone resin is used alone, the intermolecular force is small, the adhesion is poor and the price is high; On the premise of meeting the relevant functions, the appropriate silicone resin is generally added to the resin to deal with the problem of temperature resistance.

2) The higher the amount of silicone resin is, the longer the service life and heat resistance time of the coating are. When the amount of silicone resin was added from 0.1 to 0.3, the heat resistance time of the film increased from about 50 h to 100 h.

3) The heat source in high temperature environment is mainly burning of various fuels (such as coal, oil, natural gas, gas, etc.), and the rotating conflicts of machinery (such as motor, machine tool, grinding wheel, electric saw, etc.) make the mechanical energy become heat energy and some chemical reactions from heat. Generally speaking, high temperature is above 250 ℃.