Using bisphenol A epoxy resin, phosphorus flame retardant, aluminum hydroxide, and molecular sieve as the main agent, organic anhydride and accelerator as curing agent, we prepared a halogen-free flame retardant potting material for film capacitor. The effects of different flame retardants and filling content on the glass transition temperature and flame retardancy of the potting materials and the durability of the capacitor were studied, and the optimum formula of halogen-free flame retardant potting material for film capacitor was determined. The results show that the glass transition temperature of the potting materials prepared by the optimum formula is 104℃, and the flame retardant is V0 (3 mm), and the electrical insulation performance is good. The film capacitor potted with this potting material can meet the 600 h durability test under the condition of 1.2 times of voltage and 85%RH /85℃, and the capacitance change rate before and after test is 3.93%.

halogen-free flame retardant  /  film capacitor  /  potting material