| abstract |
The invention relates to a two-component flame-retardant silicone sealant and a preparation method thereof. The silicone sealant is composed of A component and B component, and the A component mainly includes: α,ω-dihydroxy polydimethylsiloxane, dimethyl silicone oil, surface modified inorganic flame retardant filler, Reinforcing filler; the B component mainly includes: carbon black paste, silane crosslinking agent, composite silane coupling agent, organic phosphorus flame retardant, and organic tin catalyst. Compared with the existing two-component flame retardant silicone sealant, the invention uses the inorganic flame retardant filler modified on the surface of the silane coupling agent, which greatly improves the mechanical properties of the sealant and makes up for the mechanical properties caused by the reduction of the reinforcing filler content. defect. The sealant has high elasticity, high weather resistance, high strength and high adhesion, and can flexibly adjust the curing time. |