The invention discloses a self-
adhesive high-thermal-
conductivity self-leveling
flame-retardant organic
silicon pouring
sealant and a preparation method thereof. The pouring
sealant is composed of a component A and a component B in parts by
mass, wherein the component A comprises 1000-1400 parts of heat-conducting filler, 50-70 parts of vinyl-terminated
silicone oil, 10-30 parts of vinyl-side
silicone oil, 2-14 parts of filler surface treating agent, 5-14 parts of
tackifier, 1-3 parts of
pigment and 1-5 parts of
platinum catalyst; the component B comprises the following components in parts by weight: 1000-1400 parts of heat-conducting filler, 60-80 parts of vinyl-terminated
silicone oil, 5-10 parts of
hydrogen-terminated
silicone oil, 3-7 parts of
hydrogen-terminated
silicone oil, 2-14 parts of filler surface treating agent, 5-14 parts of
tackifier and 1-5 parts of inhibitor; the component A and the component B are uniformly mixed according to the
mass ratio of 1: 1 for use. The organic
silicon pouring
sealant prepared by the invention not only has excellent bonding performance with a base material, but also has a heat
conductivity coefficient as high as 4.18 W / (m.K), low
viscosity, good self-leveling property, good self-foam-discharging property, excellent
constructability,
flame retardance and electrical insulating property, and is suitable for pouring, sealing and bonding packaging of electronic components with higher heat conduction requirements.