A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Non-chlorine double-comb amphoteric polycarboxylate superplasticizer and preparation method thereof
The invention discloses a non-chlorine double-comb type amphoteric polycarboxylate superplasticizer and a preparation method thereof, and the non-chlorine double-comb type amphoteric polycarboxylate superplasticizer is prepared from HPEG, an initiator, a carboxylic acid amphoteric monomer, acrylic acid, itaconic acid, a reducing agent, a chain transfer agent, water and caustic soda liquid, the mass ratio of the HPEG to the initiator to the carboxylic acid amphoteric monomer to the acrylic acid to the itaconic acid to the reducing agent to the chain transfer agent is 100: (0.6-0.8): (0.25-1.5): (8.5-9): (4-7): (0.15-0.23): (0.3-0.5). The water reducing agent has low sensitivity to soil, the surfaces of soil particles are negatively charged, cation side chain end groups in molecules of the water reducing agent can be adsorbed on the surfaces of the soil particles, the sensitivity of the water reducing agent to the soil is reduced, and the anti-soil effect can be achieved; compared with a polycarboxylic acid water reducing agent containing a quaternary ammonium salt cationic monomer, the polycarboxylic acid water reducing agent does not contain chloride ions and can eliminate potential hazards caused by corrosion of the chloride ions to reinforced concrete.
本发明公开了一种非氯双梳型两性聚羧酸减水剂及其制备方法，由HPEG、引发剂、羧酸类两性单体、丙烯酸、衣康酸、还原剂、链转移剂、水、液碱制备而成，其中，HPEG、引发剂、羧酸类两性单体、丙烯酸、衣康酸、还原剂和链转移剂的质量比为100∶0.6‑0.8∶0.25‑1.5∶8.5‑9∶4‑7∶0.15‑0.23∶0.3‑0.5。本发明对对泥土的敏感度低，泥土颗粒表面带有负电荷，其分子中的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；与含季铵盐阳离子单体的聚羧酸减水剂相比，不含有氯离子，可以消除氯离子对钢筋混凝土的锈蚀所带来的的潜在危害。
Non-chlorine double-comb amphoteric polycarboxylate superplasticizer and preparation method thereof
The invention discloses a non-chlorine double-comb type amphoteric polycarboxylate superplasticizer and a preparation method thereof, and the non-chlorine double-comb type amphoteric polycarboxylate superplasticizer is prepared from HPEG, an initiator, a carboxylic acid amphoteric monomer, acrylic acid, itaconic acid, a reducing agent, a chain transfer agent, water and caustic soda liquid, the mass ratio of the HPEG to the initiator to the carboxylic acid amphoteric monomer to the acrylic acid to the itaconic acid to the reducing agent to the chain transfer agent is 100: (0.6-0.8): (0.25-1.5): (8.5-9): (4-7): (0.15-0.23): (0.3-0.5). The water reducing agent has low sensitivity to soil, the surfaces of soil particles are negatively charged, cation side chain end groups in molecules of the water reducing agent can be adsorbed on the surfaces of the soil particles, the sensitivity of the water reducing agent to the soil is reduced, and the anti-soil effect can be achieved; compared with a polycarboxylic acid water reducing agent containing a quaternary ammonium salt cationic monomer, the polycarboxylic acid water reducing agent does not contain chloride ions and can eliminate potential hazards caused by corrosion of the chloride ions to reinforced concrete.
本发明公开了一种非氯双梳型两性聚羧酸减水剂及其制备方法，由HPEG、引发剂、羧酸类两性单体、丙烯酸、衣康酸、还原剂、链转移剂、水、液碱制备而成，其中，HPEG、引发剂、羧酸类两性单体、丙烯酸、衣康酸、还原剂和链转移剂的质量比为100∶0.6‑0.8∶0.25‑1.5∶8.5‑9∶4‑7∶0.15‑0.23∶0.3‑0.5。本发明对对泥土的敏感度低，泥土颗粒表面带有负电荷，其分子中的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；与含季铵盐阳离子单体的聚羧酸减水剂相比，不含有氯离子，可以消除氯离子对钢筋混凝土的锈蚀所带来的的潜在危害。
Non-chlorine double-comb amphoteric polycarboxylate superplasticizer and preparation method thereof
一种非氯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)
2022-05-20
Patent
Electronic Resource
Chinese
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