Polycarboxylate water reducer for polyether with molecular weight of 2200 and preparation method thereof
A technology of polycarboxylate and water reducer, which is applied in the field of building materials and polycarboxylate water reducer, which can solve the problems of lower water reducing rate, lower concrete and easy performance, and affect the steric hindrance of water reducer molecules. Achieve the effects of increasing stability, increasing electrostatic repulsion and steric hindrance, and delaying the hydration process
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Embodiment 1
[0039] 1. Adding materials for the first time: Add 330 parts of HPEG2200 macromonomer, 9 parts of N-methylmaleimide and 180 parts of water into the reaction kettle, stir and heat until it dissolves;
[0040] 2. Add hydrogen peroxide: measure the temperature in the reactor, control the temperature in the reactor at 35°C, when the temperature is stable, add 2 parts of hydrogen peroxide at one time;
[0041] 3. Add solution A and solution B: after 5 minutes, start to drop solution B and solution A in sequence. After the initiator is added, start to add solution A within 10 minutes. The solution A is added for 2 hours, and solution B is dropped Adding time is 2.5 hours; solution B is uniformly mixed with 0.9 parts of sodium dithionite, 0.9 parts of mercaptoacetic acid and 80 parts of water; solution A is made of 40 parts of acrylic acid, 4 parts of sodium vinyl sulfonate, 6 parts of 2-acrylamide- 2-Methylpropanesulfonic acid and 70 parts of water are uniformly mixed;
[0042] 4. ...
Embodiment 2
[0044] 1. Adding materials for the first time: Add 335 parts of APEG2200 macromonomer, 5 parts of 1,4-divinyl-2-azepanone and 190 parts of water into the reaction kettle, stir and heat until it dissolves;
[0045] 2. Add hydrogen peroxide: measure the temperature in the reactor, control the temperature in the reactor at 36°C, when the temperature is stable, add 2.18 parts of hydrogen peroxide at one time;
[0046] 3. Add solution A and solution B: After 5 minutes, start to add solution B and solution A in sequence. After the initiator is added, start to add solution A within 10 minutes. The solution A is added for 2.5 hours, and solution B is added Adding time is 3 hours; solution B is uniformly mixed with 0.8 parts of sodium formaldehyde sulfoxylate, 1 part of mercaptopropionic acid and 85 parts of water; solution A is made of 39 parts of acrylic acid, 5 parts of sodium propenyl sulfonate, 4 parts of N - Methyl-1-ethylene sulfonamide and 66 parts of water are uniformly mixed;...
Embodiment 3
[0049] 1. Adding materials for the first time: Add 338 parts of TPEG2200 macromonomer, 4.5 parts of (4-methylphenyl)methanimine and 200 parts of water into the reaction kettle, stir and heat until it dissolves;
[0050] 2. Add hydrogen peroxide: measure the temperature in the reactor, control the temperature in the reactor at 37°C, when the temperature is stable, add 2.55 parts of hydrogen peroxide at one time;
[0051] 3. Add solution A and solution B: after 5 minutes, start to drop solution B and solution A in sequence. After the initiator is added, start to add solution A within 10 minutes. Adding time is 3.5 hours; solution B is uniformly mixed with 0.7 parts of ascorbic acid and sodium hypophosphite in a mass ratio of 2:1, 1.2 parts of mercaptoethanol and 90 parts of water, and solution A is made of 37 parts of acrylic acid and 4.2 parts of formazan Sodium propylene sulfonate, 7 parts of N-isopropylmethacrylamide and 65 parts of water are uniformly mixed;
[0052] 4. Fin...
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