How is the temperature resistance of organosilicone resin?

Organosilicone resin has excellent temperature resistance. Here is an analysis of the temperature resistance of organosilicone resin:

Decomposition and conversion: During the decomposition process, the resin, pigments, and additives in organosilicone resin form an inorganic siloxane cross-linking structure. Above 350°C, organosilicone resin completely decomposes into an inorganic siloxane cross-linking structure, resulting in a "secondary film formation" of high-temperature resistant organosilicone coatings. This transformation process occurs in both single-component and two-component organosilicone high-temperature paints. Some high-temperature resistant coatings contain low-melting glass powder. When the glass powder reaches its melting point in a high-temperature environment, it melts and forms a loose silica layer, replacing the adhesion function of the organosilicone resin to the pigment. This forms a "secondary film formation" of high-temperature resistant coatings, providing thermal insulation and corrosion protection for the substrate.
1. Excellent heat resistance: The thermal decomposition temperature of organosilicone resin is approximately 380°C. After heating at 250°C for 24 hours, the weight loss of organosilicone resin is only 2% to 8%. Under the same conditions, typical organic resins can experience weight loss of 70% to 99%, while organosilicone resin exhibits weight loss below 20%. The long-term service temperature is 250-260°C.
2. Excellent low-temperature resistance: Organosilicone resin can operate for a long time at -70°C, demonstrating excellent low-temperature resistance.
Organosilicone Resin:
Organosilicone laminated plastics are produced by stacking layers of glass cloth impregnated with organosilicone resin and using methods such as high-pressure molding, low-pressure molding, or vacuum bag molding. They can be used for prolonged periods at 250°C, with short-term usage temperatures reaching up to 300°C. They are mainly used for slot insulation in Class H motors, high-temperature relay casings, radar antenna covers in high-speed aircraft, and printed circuit boards.
What are the applications of organosilicone resin?
1. Organosilicone paints: Heat-resistant paint, weather-resistant paint, high-temperature resistant anti-corrosion paint, coil impregnating paint.
2. Organosilicone coatings: Electronic and electrical coatings.
3. Organosilicone adhesives: Mica bonding with silicone resin, glass cloth impregnation with organosilicone resin.
4. Organosilicone film plastics: Silicone resin glass fiber sleeves, organosilicone laminating plastics.