Super-long super slow release type polycarboxylic acid slump-retaining agent master batch
An ultra-slow-release polycarboxylic acid technology, which is applied in the field of admixtures for cement-based cementitious materials, can solve problems such as segregation, bleeding, large loss of concrete slump, and difficulty in construction, etc., to prolong the setting time and prolong High slump performance and high strength
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[0025] Example 1:
[0026] An ultra-long and super slow-release polycarboxylic acid slump retaining agent masterbatch, which is characterized in that: the slump retaining agent is polymerized by the following components, the total mass of raw materials is 1000 parts, and the components and process parameters are as follows:
[0027] Base material: 2400 molecular weight methallyl polyoxyethylene ether: 327, water: 220;
[0028] Hydrogen peroxide solution: 27.5% industrial grade hydrogen peroxide: 3.0, water: 10;
[0029] Add initiator and small monomer solution in order within 10 minutes after adding hydrogen peroxide;
[0030] Initiator: sodium methacrylic acid sulfonate: 3.7, vitamin C: 0.70, water: 110;
[0031] Small monomer solution: itaconic acid: 15.5, hydroxyethyl acrylate: 42.8, methoxy polyethylene glycol acrylate: 5.5, water: 65;
[0032] Initiator dropping time: 3.5h;
[0033] The small monomer solution dripping time is 3.0h;
[0034] Holding time: 1.5h;
[0035] Liquid caustic so...
Example Embodiment
[0038] Example 2:
[0039] Base material: 2400 molecular weight isopentenol polyoxyethylene ether: 332, water: 235;
[0040] Hydrogen peroxide solution: 27.5% industrial grade hydrogen peroxide: 2.5, water: 10;
[0041] Add initiator and small monomer solution in order within 10 minutes after adding hydrogen peroxide;
[0042] Initiator: sodium vinyl sulfonate: 4.5, dimension C: 0.75, water: 110;
[0043] Small monomer solution: fumaric acid: 8.5, aconitic acid: 2.5, hydroxyethyl acrylate: 15.8, hydroxypropyl acrylate: 23.7, polyethylene glycol bismaleic acid monoester: 6.0, water: 70;
[0044] Initiator dropping time: 3.5h;
[0045] The small monomer solution dripping time is 3.0h;
[0046] Holding time: 2.0h;
[0047] Liquid caustic soda: 9;
[0048] Replenishment: 169.75.
[0049] After stirring evenly, let it stand for 10~15h.
Example Embodiment
[0050] Example 3:
[0051] Base material: 3000 molecular weight isobutenol polyoxyethylene ether: 109, 2400 molecular weight isopentenol polyoxyethylene ether: 218, water: 250;
[0052] Hydrogen peroxide solution: 27.5% industrial grade hydrogen peroxide: 3.5, water: 10;
[0053] Add initiator and small monomer solution in order within 10 minutes after adding hydrogen peroxide;
[0054] Initiator: sodium propylene sulfonate: 4.9, vitamin C: 0.85, water: 118;
[0055] Small monomer solution: maleic acid: 11.5, hydroxyethyl acrylate: 16.2, hydroxypropyl acrylate: 24.3, polyethylene glycol bismaleic acid monoester: 8.5, water: 80;
[0056] Initiator dropping time: 4.0h;
[0057] The small monomer solution dripping time is 3.5h;
[0058] Holding time: 2.0h;
[0059] Liquid caustic soda: 7.5;
[0060] Replenishment: 137.75.
[0061] After stirring evenly, let it stand for 10~15h.
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