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High-strength concrete viscosity reduction type water reducing agent and preparation method thereof
The invention relates to the technical field of water reducing agents, in particular to a high-strength concrete viscosity reduction type water reducing agent and a preparation method thereof. Comprising the following raw materials in parts by mass: 70 to 120 parts of acrylic acid, 60 to 90 parts of an unsaturated phosphate monomer, 50 to 80 parts of methyl methacrylate, 80 to 150 parts of dimethylformamide, 20 to 40 parts of polyethylene glycol monomethyl ether methacrylate, 20 to 50 parts of sodium polyacrylate, 30 to 50 parts of sodium methylallylsulfonate, 5 to 15 parts of an initiator, 20 to 60 parts of a chain transfer agent, 10 to 20 parts of sodium hydroxide and 300 to 600 parts of deionized water. Phosphoric acid groups and hydrophobic ester groups are introduced into the water reducing agent, so that the viscosity is reduced; due to introduction of hydrophobic groups, the hydrophilic-lipophilic balance value is reduced, combined water generated by the hydrophobic groups and water can be reduced, a part of free water can be released, the fluidity is improved, and the viscosity reduction effect is also achieved; meanwhile, the water reducing agent has moderate electrostatic repulsion and steric hindrance capability, and has good dispersion, adsorption and water reducing performance.
本发明涉及减水剂技术领域，具体涉及一种高强度混凝土降粘型减水剂及其制备方法。包括以下质量份数的原料有丙烯酸70～120份、不饱和磷酸酯单体60～90份、甲基丙烯酸甲酯50～80份、二甲基甲酰胺80～150份、聚乙二醇单甲醚甲基丙烯酸酯20～40份、聚丙烯酸钠20～50份、甲基烯丙基磺酸钠30～50份、引发剂5～15份、链转移剂20～60份、氢氧化钠10～20份、去离子水300～600份；本发明减水剂引入磷酸基团、疏水的酯基，使得具有降粘性；疏水基团引入，降低了其亲水亲油平衡值，则会减少其与水生成结合水，可以释放出一部分自由水，提高流动性，也达到降粘的效果；同时减水剂具有适中的静电斥力和空间位阻能力，具有良好的分散、吸附和减水性能。
High-strength concrete viscosity reduction type water reducing agent and preparation method thereof
The invention relates to the technical field of water reducing agents, in particular to a high-strength concrete viscosity reduction type water reducing agent and a preparation method thereof. Comprising the following raw materials in parts by mass: 70 to 120 parts of acrylic acid, 60 to 90 parts of an unsaturated phosphate monomer, 50 to 80 parts of methyl methacrylate, 80 to 150 parts of dimethylformamide, 20 to 40 parts of polyethylene glycol monomethyl ether methacrylate, 20 to 50 parts of sodium polyacrylate, 30 to 50 parts of sodium methylallylsulfonate, 5 to 15 parts of an initiator, 20 to 60 parts of a chain transfer agent, 10 to 20 parts of sodium hydroxide and 300 to 600 parts of deionized water. Phosphoric acid groups and hydrophobic ester groups are introduced into the water reducing agent, so that the viscosity is reduced; due to introduction of hydrophobic groups, the hydrophilic-lipophilic balance value is reduced, combined water generated by the hydrophobic groups and water can be reduced, a part of free water can be released, the fluidity is improved, and the viscosity reduction effect is also achieved; meanwhile, the water reducing agent has moderate electrostatic repulsion and steric hindrance capability, and has good dispersion, adsorption and water reducing performance.
本发明涉及减水剂技术领域，具体涉及一种高强度混凝土降粘型减水剂及其制备方法。包括以下质量份数的原料有丙烯酸70～120份、不饱和磷酸酯单体60～90份、甲基丙烯酸甲酯50～80份、二甲基甲酰胺80～150份、聚乙二醇单甲醚甲基丙烯酸酯20～40份、聚丙烯酸钠20～50份、甲基烯丙基磺酸钠30～50份、引发剂5～15份、链转移剂20～60份、氢氧化钠10～20份、去离子水300～600份；本发明减水剂引入磷酸基团、疏水的酯基，使得具有降粘性；疏水基团引入，降低了其亲水亲油平衡值，则会减少其与水生成结合水，可以释放出一部分自由水，提高流动性，也达到降粘的效果；同时减水剂具有适中的静电斥力和空间位阻能力，具有良好的分散、吸附和减水性能。
High-strength concrete viscosity reduction type water reducing agent and preparation method thereof
一种高强度混凝土降粘型减水剂及其制备方法
CHEN XIANGYU (author)
2022-03-18
Patent
Electronic Resource
Chinese
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