A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The invention relates to a production process of a polycarboxylic acid cement water reducing agent, and belongs to the technical field of water reducing agents, and the production process comprises the following steps: 1, stirring and reacting a mixed solution of 4-amino-6-hydroxypyrimidine, methyl allyl polyoxyethylene ether, DCC and DMF to obtain modified polyether; 2, stirring the modified polyether, 2-acrylamide-2-methylpropanesulfonic acid and DMF (Dimethyl Formamide) to react, so as to obtain copolymerized polyether; 3, the copolymerized polyether, DMF and maleic anhydride grafted polypropylene are stirred for a reaction, and a water reducing agent monomer is obtained; 4, the water reducing agent monomer, deionized water and a mixed solution of acrylic acid, ammonium persulfate, mercaptoethanol and deionized water are stirred for a reaction, the polycarboxylic acid water reducing agent is obtained, amido of the polycarboxylic acid water reducing agent can reduce the charge density of the water reducing agent, pyridine rings can weaken the electrostatic interaction between cement and the water reducing agent, sulfonic acid groups are strongly hydrated groups, and the water reducing agent is a water reducing agent. Through the synergistic effect of the components, the mud resistance, dispersity and water reducing performance of the water reducing agent are improved.
本发明涉及一种聚羧酸水泥减水剂的生产工艺，属于减水剂技术领域，包括以下步骤：第一步、将4‑氨基‑6‑羟基嘧啶、甲基烯丙基聚氧乙烯醚、DCC和DMF的混合液搅拌反应，得到改性聚醚；第二步、将改性聚醚、2‑丙烯酰胺‑2‑甲基丙磺酸和DMF搅拌反应，得到共聚聚醚；第三步、将共聚聚醚、DMF和马来酸酐接枝聚丙烯搅拌反应，得到减水剂单体；第四步、将减水剂单体、去离子水和丙烯酸、过硫酸铵、巯基乙醇和去离子水的混合液搅拌反应，得到聚羧酸减水剂，该聚羧酸减水剂的酰胺基能降低减水剂的电荷密度，吡啶环的削弱水泥和减水剂的静电相互作用，磺酸基是强水化基团，通过它们的协同作用，提高了减水剂的抗泥性、分散性和减水性能。
The invention relates to a production process of a polycarboxylic acid cement water reducing agent, and belongs to the technical field of water reducing agents, and the production process comprises the following steps: 1, stirring and reacting a mixed solution of 4-amino-6-hydroxypyrimidine, methyl allyl polyoxyethylene ether, DCC and DMF to obtain modified polyether; 2, stirring the modified polyether, 2-acrylamide-2-methylpropanesulfonic acid and DMF (Dimethyl Formamide) to react, so as to obtain copolymerized polyether; 3, the copolymerized polyether, DMF and maleic anhydride grafted polypropylene are stirred for a reaction, and a water reducing agent monomer is obtained; 4, the water reducing agent monomer, deionized water and a mixed solution of acrylic acid, ammonium persulfate, mercaptoethanol and deionized water are stirred for a reaction, the polycarboxylic acid water reducing agent is obtained, amido of the polycarboxylic acid water reducing agent can reduce the charge density of the water reducing agent, pyridine rings can weaken the electrostatic interaction between cement and the water reducing agent, sulfonic acid groups are strongly hydrated groups, and the water reducing agent is a water reducing agent. Through the synergistic effect of the components, the mud resistance, dispersity and water reducing performance of the water reducing agent are improved.
本发明涉及一种聚羧酸水泥减水剂的生产工艺，属于减水剂技术领域，包括以下步骤：第一步、将4‑氨基‑6‑羟基嘧啶、甲基烯丙基聚氧乙烯醚、DCC和DMF的混合液搅拌反应，得到改性聚醚；第二步、将改性聚醚、2‑丙烯酰胺‑2‑甲基丙磺酸和DMF搅拌反应，得到共聚聚醚；第三步、将共聚聚醚、DMF和马来酸酐接枝聚丙烯搅拌反应，得到减水剂单体；第四步、将减水剂单体、去离子水和丙烯酸、过硫酸铵、巯基乙醇和去离子水的混合液搅拌反应，得到聚羧酸减水剂，该聚羧酸减水剂的酰胺基能降低减水剂的电荷密度，吡啶环的削弱水泥和减水剂的静电相互作用，磺酸基是强水化基团，通过它们的协同作用，提高了减水剂的抗泥性、分散性和减水性能。
Production process of polycarboxylic acid cement water reducing agent
一种聚羧酸水泥减水剂的生产工艺
HU XIAOLI (author)
2024-04-05
Patent
Electronic Resource
Chinese
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