Preparation method and application of styrene-butadiene latex
A technology of styrene-butadiene latex and emulsifier, which is applied in the directions of non-fiber pulp addition, papermaking, coating, etc., can solve the problem of low water resistance of styrene-butadiene latex, and achieve the effect of improving water resistance, enhancing surface strength and improving water resistance.
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Embodiment 1
[0023] The 2000ml pressurized reaction kettle is first evacuated, the vacuum degree is -0.095MPa, add 0.1g of sodium alkyl diphenyl ether disulfonate, 0.1g of potassium persulfate, 50g of distilled water, completely dissolve into an aqueous solution, start stirring, and heat up to 70°C . At the same time, 10 grams of itaconic acid, 30 grams of butadiene, 100 grams of styrene, 0.2 grams of tert-dodecyl mercaptan, 0.2 grams of acrylamide, and 0.5 grams of 3-aminopropyltriethoxy were added dropwise at 70 ° C. a mixed monomer of silane; and a mixed aqueous solution of 0.4 g of sodium alkyl diphenyl ether disulfonate, 0.4 g of potassium persulfate, 0.2 g of acrylamide, and 21.93 g of distilled water. The dropwise addition time was 6 hours. After the dropwise addition, the temperature was kept at 70° C. for 8 hours. Cool to 25° C., and neutralize with 5 grams of 20 wt % sodium hydroxide aqueous solution. Filter through a 200-mesh sieve to obtain styrene-butadiene latex, with a so...
Embodiment 2
[0025] The 2000ml pressurized reaction kettle is first evacuated, the vacuum degree is -0.095MPa, add 2 grams of sodium dodecylsulfonate, 1 gram of potassium persulfate, 500 grams of distilled water, and 50 grams of styrene, completely dissolve into an aqueous solution, start stirring, and heat up to 90°C. At the same time, 5 grams of fumaric acid, 50 grams of acrylonitrile, 200 grams of butadiene, 200 grams of styrene, and 2 grams of aminopropyltrimethoxysilane were added dropwise at 90°C; and 3 grams of dodecane Sodium sulfonate, 4 grams of potassium persulfate, the mixed aqueous solution of 111 grams of distilled water. The dropwise addition time was 4 hours. After the dropwise addition was completed, the temperature was kept at 90° C. for 1 hour. Cool to 25° C., and neutralize with 12.5 g of 40 wt % sodium hydroxide aqueous solution. Filter through a 200-mesh sieve to obtain styrene-butadiene latex with a solid content of 40.23wt%, pH=8.87 (measured with a PHS-3C precis...
Embodiment 3
[0027] The 2000ml pressurized reaction kettle is first evacuated, and the vacuum degree is -0.095MPa. Add 0.5 grams of sodium lauryl sulfate, 0.5 grams of sodium persulfate, and 150 grams of distilled water to completely dissolve into an aqueous solution. Start stirring and heat up to 80 °C. At the same time, a mixture of 3 grams of methyl acrylate, 100 grams of butadiene, 200 grams of styrene, 1 gram of n-dodecanethiol acetate, and 2 grams of V-glycidyl etheroxypropyltrimethoxysilane was added dropwise at 80°C. monomer; and a mixed aqueous solution of 2 grams of sodium alkyl diphenyl ether disulfonate, 2 grams of sodium persulfate, 1 gram of acrylic acid, and 58.5 grams of distilled water. The dropwise addition time was 4 hours. After the dropwise addition was completed, the temperature was kept at 80° C. for 1.5 hours. Cool to 25° C., and neutralize with 10 grams of 30 wt % sodium hydroxide aqueous solution. Filter through a 200-mesh sieve to obtain styrene-butadiene latex...
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