Preparation method of air-entraining ester polycarboxylate superplasticizer
A technology of ester polycarboxylic acid and water reducer, which is applied in the field of construction admixtures, can solve the problems of increased chemical erosion resistance of concrete, poor concrete workability, and reduced concrete strength, and achieves increased system space and steric effects, Good air-entraining and foam-stabilizing properties, and the effect of reducing surface tension
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[0038]Example 1
[0039](1) Preparation of esterified products: 30 parts of acrylic acid, 100 parts of coconut oil diethanolamide, add 0.65 parts of sulfate, 2.6 parts of 4-hydroxyl groups, 2.6 parts of 4-hydroxyl groups in nitrogen Piperidyl oxygen free radicals, and regulates the temperature to 80 ° C, reaction for 6 h, i.e., a monomer having an amide, a dual hydroxyl group and an unsaturated esterification product;
[0040](2) Copolymerization reaction: 1 part of the esterification product obtained by 1 part of step (1), 100 parts of molecular weight 2400 polypropylene glycol 2 (meth) acrylate, 0.3 parts of dodecylbenzenesulfonic acid Sodium, 0.6 parts of diethylene glycol monochromerate and 114 parts of water, mixed in the second reaction vessel, 1.8 parts of ammonium sulfate and 20 parts of water are mixed in the first dropwater; 2 parts sulfite Sodium, 1 servantic acid mixed with 20 parts of water is uniform in the second dropwater; 8 parts of acrylic, 3 parts of oleinhydrohydrohydrohy
Example Embodiment
[0042]Example 2
[0043](1) Preparation of esterified products: 61.5 parts of maleic anhydride, 100 parts of coconut oxagol amide, adding 2.42 parts of trioxide, 0.48, adding 2.42 parts of trioxide, 0.48 under nitrogen conditions. 4-tert-butylphenol, and adjusted temperature to 90 ° C, reaction 5h, i.e., an esterification product having an amide, dihydroxy group and unsaturated acid;
[0044](2) Coopolymerization react: According to a weight, 2.5 parts of step (1) prepared esterification product, 100 parts of molecular weight 3000 polyethylene glycol polypropylene glycol 2 (meth) acrylate, 0.6 parts of dodecane Sodium sulfonate, 1.2 parts of diethylene glycol single moon ketol and 114 parts of water, mix well in the second reaction vessel, 2 parts of hydrogen peroxide and 20 parts of water mixed in the first dropwater; 3 times Sodium phosphate, 1.5 parts of mercaptopropionic acid and 20 parts of water are mixed in the second dropwise device; 5 parts of acrylic, 2 parts of oleohydrohydrohydro
Example Embodiment
[0046]Example 3
[0047](1) Preparation of esterified products: 60 parts of fumaic acid, 100 parts of cocoatoxide, and mixed in the first reaction vessel, and 5.6 parts of toluenesulfonic acid, 1.3, for nitrogen conditions The methyl phthal phenol is adjusted and the temperature is adjusted to 110 ° C, and the reaction 4H is obtained, i.e., a monomer having an amide, a dual hydroxyl group and an unsaturated esterification product;
[0048](2) Copolymerization react: According to a weight, 3.5 parts step (1) prepared esterification product, 100 parts of molecular weight 3000 polybutanol monohamethyl methacrylate, 0.45 parts of dodecylbenzenesulfonic acid Sodium and 0.9 parts of diethylene glycol monochriarate and 116 parts of water, the mixing of the second reaction vessel is mixed, 2 parts of the hydrogen peroxide and 20 parts of water are uniform in the first dropwater; 0.5 parts of ascorbic acid, 2.5 parts The thiol and 20 parts of water are mixed in the second dropwise device; 12 parts of
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