Concrete water reducing agent of polyacrylic acid and its synthesis process
A concrete water reducer and synthesis process technology, which is applied in the field of polyacrylic acid-based high-efficiency water reducer and synthesis process, can solve the problems of complex production process and high equipment requirements of water reducer, and achieve good appearance quality and good anti-segregation performance , No bleeding line effect
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Embodiment 1
[0049] Embodiment 1: Get the best matching ratio
[0050] Put 40.00g of polyethylene glycol with a molecular weight of 400, 8.4g of acrylic acid, 0.25g of hydroquinone, 1.5g of p-toluenesulfonic acid, and 200g of cyclohexane into a reaction vessel, stir at a temperature of 60°C, and wait for the After hydroquinone and p-toluenesulfonic acid are completely dissolved, then keep the temperature at 80-90°C and react for 8 hours, then filter, vacuumize and remove cyclohexane to obtain polyethylene glycol monoacrylate; add 54.41g of water into a three-necked flask and Control the temperature at 85±5°C, then add 46.80g of the esterification product of the first step, 14g of acrylic acid and 9.16g of sodium 2-acrylamide-2-methylpropenesulfonate, add 54.41g of water to dissolve and mix for dripping, 1.19 g of ammonium persulfate and 1.62 g of mercaptoethanol were dissolved in 54.41 g of water, and the three were added dropwise to the three-necked flask at a controlled rate, so that the...
Embodiment 2
[0052] Put 40.00 g of polyethylene glycol with a molecular weight of 400, 10.5 g of acrylic acid, 0.26 g of hydroquinone, 2.65 g of p-toluenesulfonic acid, and 210 g of cyclohexane into a reaction vessel, and stir at a temperature of 60°C. After hydroquinone and p-toluenesulfonic acid are completely dissolved, then keep the temperature at 80-90°C and react for 8 hours, then filter, vacuumize and remove cyclohexane to obtain polyethylene glycol monoacrylate; add 55.84 g of water into a three-necked flask and Control the temperature at 85±5°C, then add 46.80g of the esterification product of the first step, 14g of acrylic acid and 10.99g of sodium 2-acrylamide-2-methylpropenesulfonate, add 55.84g of water to dissolve and mix until dripping, 1.19 g of ammonium persulfate and 1.62 g of mercaptoethanol were dissolved in 55.84 g of water, and the three were added dropwise to the three-necked flask at a controlled rate, so that the drops were completed within 2±0.5 hours, and the reac...
Embodiment 3
[0054] Put 40.00 g of polyethylene glycol with a molecular weight of 400, 8.4 g of acrylic acid, 0.25 g of hydroquinone, 1.51 g of p-toluenesulfonic acid, and 200 g of cyclohexane into a reaction vessel, and stir at a temperature of 60°C. After hydroquinone and toluenesulfonic acid are completely dissolved, then keep the temperature at 110-115°C and react for 8±0.5 hours, then filter, vacuumize and remove cyclohexane to obtain polyethylene glycol monomethacrylate; add 60.92g of water There is a three-necked flask and the temperature is controlled at 85±5°C, then add 46.80g of the esterification product of the first step, 22.36g of acrylic acid and 9.16g of sodium 2-acrylamide-2-methylpropenesulfonate, and add 60.92g of water to dissolve them Mix, dissolve 1.19 g of ammonium persulfate and 1.62 g of mercaptoethanol in 60.92 g of water, and add the three to the three-necked flask at a controlled rate dropwise, so that the drops are completed within 2±0.5 hours, and the reaction i...
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