Intermediate of high strength water reducer, preparation method thereof and high strength water reducer prepared by intermediate
A water reducer, high-strength technology, applied in the intermediate of high-strength water reducer, high-strength water reducer field, can solve the functions of other aspects that are rarely concerned, affect the performance of copolymer dispersants, limit polycarboxylic acid Problems such as the development of water reducing agent, to achieve the effect of simple preparation method, improve cement dispersion and dispersion retention, and save resources and energy
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Embodiment 1
[0032] In a dry 1L three-necked flask, add 650g of n-butyl-terminated amino polyether (m=9, n=2, random structure) with an average molecular weight of 500, heat up to 30°C under continuous stirring, and then add Slowly add 147g of allyl glycidyl ether dropwise for 8 hours, and keep warm for 1 hour after the dropwise addition to obtain polyetheramine active macromonomer PEA-1 with an average molecular weight of 614.
[0033] In a 1L glass reactor equipped with a thermometer, a stirrer, a dropping funnel and a nitrogen conduit, add 165g of water and 385g of polyetheramine reactive macromonomer PEA-1, stir to raise the temperature, and purge the reactor with nitrogen, and raise the temperature to 95 After ℃, 76.8g of maleic acid, 0.27g of 3-mercaptopropionic acid and 140g of water were mixed and stirred to form a uniform aqueous solution, which was added dropwise to the reactor at a constant speed for 4 hours, and 152g of water was added dropwise at a constant speed The aqueous s...
Embodiment 2
[0035] In a dry 1L three-necked flask, add 740g of methyl-terminated amino polyether (m=33, n=8, propylene oxide-ethylene oxide diblock structure) with an average molecular weight of 2000, and keep stirring to raise the temperature to 50°C, then slowly add 47.1g of methallyl glycidyl ether dropwise into the flask for 6 hours, and continue to keep warm for 1 hour after the dropwise addition, to obtain the polyetheramine active macromonomer PEA-2 with an average molecular weight of 2100 .
[0036] In a 1L glass reactor equipped with a thermometer, stirrer, dropping funnel and nitrogen conduit, add 213g of water and 320g of polyetheramine active macromonomer PEA-2, stir to raise the temperature, and purge the reactor with nitrogen, and raise the temperature to 30 After ℃, mix and stir 36.6g of sodium acrylate, 5.25g of maleic acid, 0.38g of thioglycolic acid, 0.21g of chamomile powder and 150g of water to make a homogeneous aqueous solution, and drop it into the reactor at a cons...
Embodiment 3
[0038] In a dry 1L three-necked flask, add 525g of ethyl-terminated amino polyether (m=25, n=0, polyoxyethylene ether) with an average molecular weight of 1100, and heat up to 60°C under continuous stirring, and then pour into the flask Slowly add 67.3 g of glycidyl methacrylate dropwise for 4 hours, and continue to keep warm for 2 hours after the dropwise addition to obtain the polyetheramine active macromonomer PEA-3 with an average molecular weight of 1200.
[0039] In a 1L glass reactor equipped with a thermometer, stirrer, dropping funnel and nitrogen conduit, add 160g of water and 240g of polyetheramine active macromonomer PEA-3, stir to raise the temperature, and purge the reactor with nitrogen, and raise the temperature to 70 After ℃, 20.2g of potassium methacrylate, 4.5g of acrylic acid, 1.58g of 2-mercaptopropanol and 210g of water were mixed and stirred to form a uniform aqueous solution, which was added dropwise to the reactor at a constant speed for 4.5 hours. Add...
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