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Slow-release viscosity-reducing polycarboxylate superplasticizer for high-strength concrete and preparation method of slow-release viscosity-reducing polycarboxylate superplasticizer
The invention discloses a slow-release viscosity reduction type polycarboxylic acid water reducer for high-strength concrete. The slow-release viscosity reduction type polycarboxylic acid water reducer is prepared from the following raw materials in parts by weight: 400 parts of unsaturated polyether macromonomer, 10 to 15 parts of unsaturated acid monomer, 5 to 10 parts of unsaturated ester monomer, 4 to 8 parts of unsaturated amide monomer and 3 to 5 parts of functional monomer. The slow-release viscosity reduction type polycarboxylic acid water reducer for the high-strength concrete further comprises an oxidizing agent, a reducing agent and a chain transfer agent, the dosage of the oxidizing agent is 0.1%-0.4% of the total monomer mass, the dosage of the reducing agent is 0.1%-0.3% of the total monomer mass, and the dosage of the chain transfer agent is 0.2%-0.5% of the total monomer mass. The invention also discloses a preparation method of the slow-release viscosity-reducing polycarboxylic acid water reducer for the high-strength concrete. Acetate groups with low polarity are introduced into the molecular structure of the polymer, so that the dosage of unsaturated acrylic monomers is effectively reduced, and the material and doping amount sensitivity of the slow-release viscosity-reducing polycarboxylic acid water reducer is reduced.
本发明公开了一种高强混凝土用缓释降粘型聚羧酸减水剂，包括以下按重量份数配比的原料：不饱和聚醚大单体400份，不饱和酸类单体10份‑15份，不饱和酯类单体5份‑10份，不饱和酰胺类单体4份‑8份，功能单体3份‑5份；高强混凝土用缓释降粘型聚羧酸减水剂还包括氧化剂、还原剂以及链转移剂，氧化剂的用量为总单体质量的0.1％‑0.4％，还原剂的用量为总单体质量的0.1％‑0.3％，链转移剂的用量为总单体质量的0.2％‑0.5％。本发明还公开了一种高强混凝土用缓释降粘型聚羧酸减水剂的制备方法。本发明通过在聚合物分子结构中引入极性较低的乙酸酯类基团，有效降低了不饱和丙烯酸类单体的用量，从而降低了该缓释降粘型聚羧酸减水剂的材料、掺量敏感性。
Slow-release viscosity-reducing polycarboxylate superplasticizer for high-strength concrete and preparation method of slow-release viscosity-reducing polycarboxylate superplasticizer
The invention discloses a slow-release viscosity reduction type polycarboxylic acid water reducer for high-strength concrete. The slow-release viscosity reduction type polycarboxylic acid water reducer is prepared from the following raw materials in parts by weight: 400 parts of unsaturated polyether macromonomer, 10 to 15 parts of unsaturated acid monomer, 5 to 10 parts of unsaturated ester monomer, 4 to 8 parts of unsaturated amide monomer and 3 to 5 parts of functional monomer. The slow-release viscosity reduction type polycarboxylic acid water reducer for the high-strength concrete further comprises an oxidizing agent, a reducing agent and a chain transfer agent, the dosage of the oxidizing agent is 0.1%-0.4% of the total monomer mass, the dosage of the reducing agent is 0.1%-0.3% of the total monomer mass, and the dosage of the chain transfer agent is 0.2%-0.5% of the total monomer mass. The invention also discloses a preparation method of the slow-release viscosity-reducing polycarboxylic acid water reducer for the high-strength concrete. Acetate groups with low polarity are introduced into the molecular structure of the polymer, so that the dosage of unsaturated acrylic monomers is effectively reduced, and the material and doping amount sensitivity of the slow-release viscosity-reducing polycarboxylic acid water reducer is reduced.
本发明公开了一种高强混凝土用缓释降粘型聚羧酸减水剂，包括以下按重量份数配比的原料：不饱和聚醚大单体400份，不饱和酸类单体10份‑15份，不饱和酯类单体5份‑10份，不饱和酰胺类单体4份‑8份，功能单体3份‑5份；高强混凝土用缓释降粘型聚羧酸减水剂还包括氧化剂、还原剂以及链转移剂，氧化剂的用量为总单体质量的0.1％‑0.4％，还原剂的用量为总单体质量的0.1％‑0.3％，链转移剂的用量为总单体质量的0.2％‑0.5％。本发明还公开了一种高强混凝土用缓释降粘型聚羧酸减水剂的制备方法。本发明通过在聚合物分子结构中引入极性较低的乙酸酯类基团，有效降低了不饱和丙烯酸类单体的用量，从而降低了该缓释降粘型聚羧酸减水剂的材料、掺量敏感性。
Slow-release viscosity-reducing polycarboxylate superplasticizer for high-strength concrete and preparation method of slow-release viscosity-reducing polycarboxylate superplasticizer
一种高强混凝土用缓释降粘型聚羧酸减水剂及其制备方法
WANG SHAOFENG (author) / SHAN HAILIN (author) / CHEN JING (author) / LIU QIBIN (author) / BI YAO (author) / ZHOU HUI (author) / YAN SHENGDONG (author) / CAI XIN (author) / HOU BOWEN (author)
2023-08-22
Patent
Electronic Resource
Chinese
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