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A platform for research: civil engineering, architecture and urbanism
High-workability double-comb amphoteric polycarboxylate superplasticizer and preparation method thereof
The invention discloses a high-workability double-comb type amphoteric polycarboxylate superplasticizer and a preparation method thereof, the high-workability double-comb type amphoteric polycarboxylate superplasticizer is prepared from HPEG, deionized water, an initiator, acrylic acid, itaconic acid, a cationic monomer K, a reducing agent, a chain transfer agent and caustic soda liquid, the mass ratio of the HPEG to the initiator to the acrylic acid to the itaconic acid to the cationic monomer K to the reducing agent to the chain transfer agent is 100: (0.6-0.8): (6-12): (4-8): (0.4-1.2): (0.1-0.2): (0.4-0.8). According to the invention, cations are introduced into the molecular structure, so that the stretching conformation of the copolymer can be kept theoretically, and the introduced cation groups can improve the dispersing and water reducing capacity of the water reducing agent in concrete by increasing the adsorption capacity of main minerals C3S and C2S of cement to the water reducing agent. Moreover, the cationic side chain end group can be adsorbed on the surfaces of soil particles, so that the sensitivity of the water reducing agent to soil is reduced, and the anti-soil effect can be achieved.
本发明公开了一种高和易性双梳型两性聚羧酸减水剂及其制备方法，由HPEG、去离子水、引发剂、丙烯酸、衣康酸、阳离子单体K、还原剂、链转移剂和液碱制成，其中，阳离子单体由甲基丙烯酸二甲氨基乙酯和氯化苄经季铵化反应制成，HPEG、引发剂、丙烯酸、衣康酸、阳离子单体K、还原剂和链转移剂的质量比为100∶0.6‑0.8∶6‑12∶4‑8∶0.4‑1.2∶0.1‑0.2∶0.4‑0.8。本发明通过在分子结构中引入了阳离子，理论上可以保持共聚物伸展构象，引进的阳离子基团通过增加对水泥主要矿物C3S和C2S对减水剂吸附量，能提高其在混凝土中的分散减水能力。并且，阳离子侧链端基能吸附在泥土颗粒表面，降低了减水剂对泥土的敏感度，能起到抗泥的作用。
High-workability double-comb amphoteric polycarboxylate superplasticizer and preparation method thereof
The invention discloses a high-workability double-comb type amphoteric polycarboxylate superplasticizer and a preparation method thereof, the high-workability double-comb type amphoteric polycarboxylate superplasticizer is prepared from HPEG, deionized water, an initiator, acrylic acid, itaconic acid, a cationic monomer K, a reducing agent, a chain transfer agent and caustic soda liquid, the mass ratio of the HPEG to the initiator to the acrylic acid to the itaconic acid to the cationic monomer K to the reducing agent to the chain transfer agent is 100: (0.6-0.8): (6-12): (4-8): (0.4-1.2): (0.1-0.2): (0.4-0.8). According to the invention, cations are introduced into the molecular structure, so that the stretching conformation of the copolymer can be kept theoretically, and the introduced cation groups can improve the dispersing and water reducing capacity of the water reducing agent in concrete by increasing the adsorption capacity of main minerals C3S and C2S of cement to the water reducing agent. Moreover, the cationic side chain end group can be adsorbed on the surfaces of soil particles, so that the sensitivity of the water reducing agent to soil is reduced, and the anti-soil effect can be achieved.
本发明公开了一种高和易性双梳型两性聚羧酸减水剂及其制备方法，由HPEG、去离子水、引发剂、丙烯酸、衣康酸、阳离子单体K、还原剂、链转移剂和液碱制成，其中，阳离子单体由甲基丙烯酸二甲氨基乙酯和氯化苄经季铵化反应制成，HPEG、引发剂、丙烯酸、衣康酸、阳离子单体K、还原剂和链转移剂的质量比为100∶0.6‑0.8∶6‑12∶4‑8∶0.4‑1.2∶0.1‑0.2∶0.4‑0.8。本发明通过在分子结构中引入了阳离子，理论上可以保持共聚物伸展构象，引进的阳离子基团通过增加对水泥主要矿物C3S和C2S对减水剂吸附量，能提高其在混凝土中的分散减水能力。并且，阳离子侧链端基能吸附在泥土颗粒表面，降低了减水剂对泥土的敏感度，能起到抗泥的作用。
High-workability double-comb amphoteric polycarboxylate superplasticizer and preparation method thereof
一种高和易性双梳型两性聚羧酸减水剂及其制备方法
KANG JINGXIN (author) / LI FANG (author) / YANG XIUFANG (author)
2022-09-27
Patent
Electronic Resource
Chinese
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