The invention relates to a high-strength and high-
toughness motor pouring
sealant, which comprises a motor pouring
sealant formed by mixing a component A and a component B. The component A and the component B are mixed according to a weight ratio of 100: 16. The component B is prepared from the following components in parts by weight: 50 to 150 parts of
epoxy resin, 5 to 30 parts of
reactive diluent, 15 to 200 parts of reinforcing filler, 30 to 300 parts of aluminum
hydroxide, 5 to 20 parts of toughened resin, 0.2 to 1.5 parts of color paste and 0.2 to 1.5 parts of
tackifier; the component B is prepared from the following components in parts by weight: 5 to 30 parts of
polyol curing agent and 5 to 30 parts of amine curing agent; the
viscosity of the motor pouring
sealant is 1000-2000 mpa.s, the
thermal conductivity is 0.5-1.0 W / m.k, the
breakdown voltage is larger than 20 kV / mm, and the
flame retardant property is V0 level. According to the motor pouring sealant disclosed by the invention, the raw materials of a synergistic
system of the
epoxy resin, the toughened resin, the reinforcing filler, the composite curing agent and the
tackifier are matched in a special proportion, so that the motor pouring sealant with
high heat conductivity and good insulating and
flame-retardant properties under low
viscosity is realized.