Organotin compounds are metal-organic compounds formed by the direct combination of tin and carbon elements. There are two types of alkyltin compounds and aromatic tin compounds, whose basic structures are mono-, di-, tri- and tetra-substituted (referring to the number of substituents R). Metallic tin is used in the synthesis of 10% to 20% of organotin compounds.
Triethanolamine Triethanolamine is a yellow viscous liquid with a simple structural formula (CH, CHa OH) aN and a relative molecular mass of 149. It can be mixed with water and ethanol in any ratio. It is a weak organic base. Triethanolamine is mainly used as a carbonizing agent (carbon source) and foaming agent in fire-retardant coatings. It can also act as a surfactant, stabilizer, emulsifier, lubricant, etc. in fire-retardant coatings. Sometimes it is a curing agent group. One part is often used in intumescent transparent fireproof coatings.
Antimony trioxide Antimony trioxide is abbreviated as antimony oxide, its molecular formula is S baO, and its relative molecular mass is 291.5. Antimony trioxide is a white crystalline powder at room temperature, which turns yellow when heated. The typical chemical composition of antimony trioxide is Sb zO, 98%~99%, Sb: 0.1.5%, FezO; 0.01%, As0.35%, Pb0.1%, S0.1%. The average particle size is 1~3pm, the density is 5.67g/cm, the melting point is 656℃, the boiling point is 1425℃, the heat of fusion is 54.4~55.3kJ/mol, the heat of evaporation is 36.3~37.2kJ/mol, the heat of generation (A Hog ) Is 692.5kJ/mol. It is a kind of inorganic sun-flammable additive widely used in fire-retardant coatings. When used alone, it has a low flame-limiting effect. If it is used in conjunction with phosphate and halide, it has a good synergistic effect and the flame-retardant effect is significantly improved. The reaction of the two can generate antimony halide (SbC lg) and antimony oxyhalide (Sb OCl), montan wax hs code which can absorb heat when volatilized, and at the same time produce gas to isolate oxygen and dilute the concentration of combustible gas. In the combustion zone, the antimony halide can also be thermally decomposed into antimony oxide.
180~185℃3SbgO, +6RC 1-6SbOCI-3R: O
245~280℃5SbOC 1-S biO Cl, +SbCl
The antimony halide (SbCl or Sb Br) produced by the reaction can not only block oxygen and dilute the combustible gas, but also capture gas-phase free radicals (·H and ·OH) to promote the formation of carbides.
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