新型无机复合沥青阻燃剂的制备及其阻燃机理.

Hydroxide, zinc borate and ammonium polyphosphate were used as raw materials, and titanate was used as surface modification material to prepare a new type of inorganic composite flame retardant. The four-factor and threelevel orthogonal method was used to prepare different flame retardant compounding combinations. Combined with the tests of limiting oxygen index, smoke density and SBS flame retardant asphalt, the multi-index weighted comprehensive analysis method was used to evaluate the flame retardant under different compounding conditions. The properties of the agent determined the optimum formulation of the flame retardant. At the same time, the thermal analysis mechanism of the new inorganic composite flame retardant was investigated. The results show that the titanate treatment solution is used as a coupling agent to treat the flame retardant intermediate, and the amount of titanate ranges from 3.5% to 4%. The best formula of the flame retardant is: magnesium hydroxide: zinc borate: ammonium polyphosphate: titanate = 1:1: 1.65: 0. 128. The inorganic composite flame retardant is incorporated into the SBS modified asphalt, the flame retardant crosslinks with the SBS, the SBS segment movement is hindered, and the heat absorption is reduced. And improving the volatilization temperature of the light components in the SBS modified asphalt can effectively reduce the light component volatilization. The flame retardant will decompose first upon heating. During the decomposition process, a large amount of heat is absorbed, a flame retardant gas is released, and the oxygen concentration is lowered to achieve a flame retardant effect. [ABSTRACT FROM AUTHOR]