Addition-type bi-component heat-conducting pouring sealant and preparation method thereof

The invention discloses an addition-type bi-component heat-conducting pouring sealant and a preparation method thereof and belongs to the technical field of polymer materials. The pouring sealant is composed of a component A and a component B, wherein the component A contains 100 parts by weight of vinyl silicone oil, 0-2 parts by weight of hydrogen-contained silicon oil, 200-400 parts by weight of filler, 0.1-0.5 part by weight of inhibitor and 4-6 parts by weight of thickening agent; the component B contains 10-40 parts by weight of plasticizer and 0.3-0.8 part by weight of platinum catalyst; and the mass ratio of the component A to the component B is (8-12):(0.8-1.2). The pouring sealant disclosed by the invention has excellent heat conductivity, flowability and adhesive property. The thickening agent can be used as a main crosslinking agent for addition reaction and can be compounded with the hydrogen-contained silicon oil to realize curing reaction, so that the adhesive property of the pouring sealant to a base material can be improved, the steam is effectively prevented from permeating into electronic devices, a power source of a street lamp, a transformer and the like cannot be influenced by snowy and rainy weathers when working outdoors, and the reliability of equipment is improved.