A. Low voltage insulation material
1.1 Formula
Epoxy resin E-44 100
Diluent Dibromophenyl glycidyl ether 20
Flame retardant antimony trioxide 10
Active silica powder 400 mesh 200
Curing agent 593 25
Diethylenetriamine 3
1.2 Production process
1.2.1 Dry silicon powder to the moisture content below 0.2%
1.2.2 Add epoxy resin, thinner, flame retardant, and silicon powder to the reactor in the following order
1.2.3 Raise the temperature to 100℃, degas the mixture under -0.1Mpa vacuum for 30min to uniformity
1.2.4 Cool to below 50°C, add curing agent, keep the temperature no more than 50°C, degas vacuum degree -0.1Mpa, mixing time no more than 30min, then enter the casting process.
B. High voltage and low voltage insulation materials
2.1 Formulation
Epoxy resin E-44 100
Diluent Dibromophenyl glycidyl ether 20
Flame retardant antimony trioxide 10
Active silica powder 400 mesh 300
Curing agent S101 95
Accelerator DMP-30 1.5
2.2 Production process
2.2.1 Dry silicon powder to the moisture content below 0.2%
2.2.2 Make a two-component in the following order
A component epoxy resin, accelerator, flame retardant, silicon powder 200
B component curing agent, thinner, silicon powder 100
2.2.3 The A component is heated to 80-100℃, and the mixture is degassed under -0.1Mpa vacuum for 30min to uniformity
2.2.4 The temperature of component B is raised to 50℃, and the mixture is degassed under -0.1Mpa vacuum for 30min to uniformity
2.2.5 Cool to below 50℃, add component A to component B, keep the temperature not more than 50℃, degas vacuum degree -0.1Mpa, mixing time 30min, you can enter pouring.
