Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Precise polymer sealing waterproof agent for grouting
The invention discloses a precise polymer sealing waterproof agent for grouting. The sealing waterproof agent is prepared from methyl methacrylate, butyl acrylate, acrylic acid, a silicon-containing acrylic monomer, hexafluorobutyl methacrylate, dodecafluoroheptyl methacrylate, ammonium persulfate, a compound emulsifier and deionized water. The precise high-molecular sealing waterproof agent for grouting is prepared by the following steps: preparing monomer solutions of a pre-emulsifier I, a pre-emulsifier II, a pre-emulsifier III and an ammonium persulfate solution, adding all the monomer solutions into an emulsification system in advance at a certain rate, dropwise adding an emulsion into a reactor at a certain rate. The pre-emulsified monomer no longer captures the compound emulsifier on the surface of the water phase or surrounding latex particles, and the monomer in the polymerization reactor is always in a starvation state, so that the reaction is stably and uniformly carried out, and system stability is higher; therefore, the problems of low monomer conversion rate, high gel rate, large average particle size and low stability in the preparation process of the waterproof agent are effectively solved.
本发明公开了一种精密型高分子灌浆用密封防水剂，由甲基丙烯酸甲酯、丙烯酸丁酯、丙烯酸、含硅丙烯酸单体、甲基丙烯酸六氟丁酯、甲基丙烯酸十二氟庚酯、过硫酸铵、复合乳化剂和去离子水组成。该精密型高分子灌浆用密封防水剂，通过制备预乳化剂Ⅰ、预乳化剂Ⅱ、预乳化剂Ⅲ以及过硫酸铵溶液单体溶液，再将所有单体溶液预先按照一定的速率加入到乳化体系中，乳化液按照一定的速率滴加到反应器中，已预乳化的单体不再会夺取水相或周围乳胶粒表面的复合乳化剂，且聚合反应器中单体始终处于饥饿状态，有利于反应稳定均衡地进行，体系稳定性较高，从而有效地解决防水剂在进行制备过程中存在单体转化率低、凝胶率高、平均粒径大以及稳定性低的问题。
Precise polymer sealing waterproof agent for grouting
The invention discloses a precise polymer sealing waterproof agent for grouting. The sealing waterproof agent is prepared from methyl methacrylate, butyl acrylate, acrylic acid, a silicon-containing acrylic monomer, hexafluorobutyl methacrylate, dodecafluoroheptyl methacrylate, ammonium persulfate, a compound emulsifier and deionized water. The precise high-molecular sealing waterproof agent for grouting is prepared by the following steps: preparing monomer solutions of a pre-emulsifier I, a pre-emulsifier II, a pre-emulsifier III and an ammonium persulfate solution, adding all the monomer solutions into an emulsification system in advance at a certain rate, dropwise adding an emulsion into a reactor at a certain rate. The pre-emulsified monomer no longer captures the compound emulsifier on the surface of the water phase or surrounding latex particles, and the monomer in the polymerization reactor is always in a starvation state, so that the reaction is stably and uniformly carried out, and system stability is higher; therefore, the problems of low monomer conversion rate, high gel rate, large average particle size and low stability in the preparation process of the waterproof agent are effectively solved.
本发明公开了一种精密型高分子灌浆用密封防水剂，由甲基丙烯酸甲酯、丙烯酸丁酯、丙烯酸、含硅丙烯酸单体、甲基丙烯酸六氟丁酯、甲基丙烯酸十二氟庚酯、过硫酸铵、复合乳化剂和去离子水组成。该精密型高分子灌浆用密封防水剂，通过制备预乳化剂Ⅰ、预乳化剂Ⅱ、预乳化剂Ⅲ以及过硫酸铵溶液单体溶液，再将所有单体溶液预先按照一定的速率加入到乳化体系中，乳化液按照一定的速率滴加到反应器中，已预乳化的单体不再会夺取水相或周围乳胶粒表面的复合乳化剂，且聚合反应器中单体始终处于饥饿状态，有利于反应稳定均衡地进行，体系稳定性较高，从而有效地解决防水剂在进行制备过程中存在单体转化率低、凝胶率高、平均粒径大以及稳定性低的问题。
Precise polymer sealing waterproof agent for grouting
一种精密型高分子灌浆用密封防水剂
DING XIAOCHUN (Autor:in) / ZHANG DONGMING (Autor:in) / HOU FENGGANG (Autor:in)
03.09.2021
Patent
Elektronische Ressource
Chinesisch
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