Method for producing block-type ether cement dispersant
The technology of a cement dispersant and a production method, which is applied in the field of chemical building materials for construction, can solve the problems of reducing the workability and operability of concrete, the large fluctuation of cement adaptability, and the decline of dispersing performance, so as to improve the fluidity and pumpability, Improved adaptability and less gas content
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Embodiment 1
[0034] Feeding amount is calculated in parts by weight, as shown in the table below,
[0035]
[0036] The production process steps are as follows:
[0037] ①. Put methacrylic acid, hydroxyl-terminated oxyethylene and oxypropylene block polyether (a), amine-terminated oxyethylene and oxypropylene block polyether (b) into a reaction vessel, heat up, and mix After uniformity, add a polymerization inhibitor and a catalyst, pass through nitrogen protection, control the reaction temperature at 125°C, and react for 6.8 hours to obtain macromolecular active monomers Xa and Xb;
[0038] ②. In the reaction vessel, add deionized water, pass nitrogen to remove the air, turn on the condensing reflux device, and raise the temperature to 95°C;
[0039] 3. Macromolecular active monomer Xa and Xb, functional monomer (z) are made into solution with 110 parts of deionized water;
[0040] 4. The initiator is made into an initiator solution with 16 parts of deionized water;
[0041] ⑤. Add ...
Embodiment 2
[0045] Feeding amount is calculated in parts by weight, as shown in the table below,
[0046]
[0047] The production process steps are as follows:
[0048] ①. Put methacrylic acid, hydroxyl-terminated oxyethylene and oxypropylene block polyether (a), amine-terminated oxyethylene and oxypropylene block polyether (b) into a reaction vessel, heat up, and mix After uniformity, add a polymerization inhibitor and a catalyst, pass through nitrogen protection, control the reaction temperature at 120°C, and react for 6.5 hours to obtain macromolecular active monomers Xa and Xb;
[0049] ②. In the reaction vessel, add deionized water, pass nitrogen to remove the air, turn on the condensing reflux device, and raise the temperature to 88°C;
[0050] 3. Macromolecular active monomer Xa and Xb, functional monomer (z) are made into solution with 70 parts of deionized water;
[0051] 4. The initiator is made into an initiator solution with 24 parts of deionized water;
[0052] ⑤. Add t...
Embodiment 3
[0056] Feeding amount is calculated in parts by weight, as shown in the table below,
[0057]
[0058] The production process steps are as follows:
[0059] ①. Put methacrylic acid, hydroxyl-terminated oxyethylene and oxypropylene block polyether (a), amine-terminated oxyethylene and oxypropylene block polyether (b) into a reaction vessel, heat up, and mix After uniformity, add a polymerization inhibitor and a catalyst, pass through nitrogen protection, control the reaction temperature at 130°C, and react for 6.2 hours to obtain macromolecular active monomers Xa and Xb;
[0060] ②. In the reaction vessel, add deionized water, pass nitrogen to remove the air, turn on the condensing reflux device, and raise the temperature to 80°C;
[0061] 3. Macromolecular active monomer Xa and Xb, functional monomer (z) are made into solution with 65 parts of deionized water;
[0062] 4., the initiator is made into initiator solution with 48 parts of deionized water;
[0063] ⑤. Add the...
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