A kind of preparation method of environment-friendly flame-retardant powder styrene-butadiene rubber
A powdered styrene-butadiene rubber, environmentally friendly technology, applied in the field of preparation of environmentally friendly flame-retardant powdered styrene-butadiene rubber, can solve the problem of uneven dispersion, achieve the effect of increasing the powder forming rate, avoiding migration and precipitation, and preventing mutual agglomeration
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Embodiment 1
[0035] (1) Preparation of acylated styrene-butadiene latex: 100 parts of styrene-butadiene latex SBR1500, 2 parts of sodium dodecylbenzenesulfonate, 5.5 parts of CS 2 , then stirred and heated, and when the temperature of the polymerization kettle rose to 40°C, quickly added 0.05 parts of AlCl 3 , until the system turns orange-red, add 5 parts of phthalic anhydride, then react at 45°C for 2 hours, and finally add 12 parts by mass of 2.4% dilute hydrochloric acid aqueous solution to terminate the reaction, suction filter and wash to obtain phthalic anhydride SBR latex. Sampling analysis: the measured degree of acetylation of acylated styrene-butadiene latex is 13.1%.
[0036] (2) Preparation of functionalized halogen-free flame retardant: Add 1.2 parts of KH-550, 70 parts of water, and 12 parts of ethanol into the polymerization kettle and stir to mix evenly. Adjust the pH value of the system to 4 with a mass concentration of 0.05% oxalic acid solution , then add 100 parts of...
Embodiment 2
[0043] (1) Preparation of acylated styrene-butadiene latex: same as Example 1.
[0044] (2) Preparation of functionalized halogen-free flame retardant: same as Example 1.
[0045] (3) Preparation of environmentally friendly flame-retardant powdered styrene-butadiene rubber: add 100 parts of styrene-butadiene latex SBR1500 to the coagulation kettle, then add 150 parts of water, stir, and when the temperature rises to 45°C, add 6.5 parts of functionalized aluminum hydroxide a , stirred and mixed for 25 minutes; finally, 2 parts of potassium oleate and 3 parts of magnesium chloride were added successively, and the pH value of the system was adjusted to 9 with sodium hydroxide for coagulation, stirred at 70°C for 30 minutes for aging, and then washed, dehydrated, and dried to obtain environmental protection Type flame retardant powdered styrene-butadiene rubber products. Sampling and analysis: standard samples were made, and the tested properties are shown in Table 1.
Embodiment 3
[0050] (1) Preparation of acylated styrene-butadiene latex: same as Example 1.
[0051] (2) Preparation of functionalized halogen-free flame retardant: same as Example 1.
[0052] (3) Preparation of environmentally friendly flame-retardant powdered styrene-butadiene rubber: add 100 parts of styrene-butadiene latex SBR1500 to the coagulation kettle, then add 150 parts of water, stir, and when the temperature rises to 45 ° C, then add 7.0 parts of functionalized aluminum hydroxide a , stirred and mixed for 25 minutes; finally, 2 parts of potassium oleate and 3 parts of magnesium chloride were added successively, and the pH value of the system was adjusted to 9 with sodium hydroxide for coagulation, stirred at 70°C for 30 minutes for aging, and then washed, dehydrated, and dried to obtain environmental protection Type flame retardant powdered styrene-butadiene rubber products. Sampling and analysis: standard samples were made, and the tested properties are shown in Table 1.
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