Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The invention belongs to the technical field of water reducing agents, and particularly relates to a modified polycarboxylic acid water reducing agent and a preparation method thereof. The preparation method comprises the following steps: (1) adding water into a reaction container, heating to 70-90 DEG C, adding polyethylene glycol methyl ether methacrylate and methacrylic acid, and introducing nitrogen for protection; dropwise adding an initiator, wherein dropwise adding is completed within 1 h; continuously stirring and carrying out copolymerization reaction for 1-4 hours to obtain a polycarboxylate water reducing agent primary product; (2) adding copper bromide, 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate and dimethyl adipate into the reaction container, continuously reacting for 20-50 minutes, and then adding a regulator to regulate the pH value to 8-9.5, thereby obtaining the modified polycarboxylic acid water reducer. The water reducing agent has excellent water reducing effect and slump retaining property.
本发明属于减水剂技术领域，具体涉及一种改性聚羧酸减水剂及其制备方法。所述制备方法为：（1）将水加入到反应容器中，升温至70℃～90℃，加入聚乙二醇甲醚甲基丙烯酸酯和甲基丙烯酸，通入氮气保护；滴加引发剂，1h内滴加完成；继续搅拌进行共聚反应1h～4h得到聚羧酸盐减水剂初品；（2）往反应容器中加入溴化铜、十二碳醇酯和己二酸二甲酯，继续反应20min～50min，然后加入调节剂调节pH至8～9.5，得到改性聚羧酸减水剂。该减水剂具有优良的减水作用和保坍性。
The invention belongs to the technical field of water reducing agents, and particularly relates to a modified polycarboxylic acid water reducing agent and a preparation method thereof. The preparation method comprises the following steps: (1) adding water into a reaction container, heating to 70-90 DEG C, adding polyethylene glycol methyl ether methacrylate and methacrylic acid, and introducing nitrogen for protection; dropwise adding an initiator, wherein dropwise adding is completed within 1 h; continuously stirring and carrying out copolymerization reaction for 1-4 hours to obtain a polycarboxylate water reducing agent primary product; (2) adding copper bromide, 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate and dimethyl adipate into the reaction container, continuously reacting for 20-50 minutes, and then adding a regulator to regulate the pH value to 8-9.5, thereby obtaining the modified polycarboxylic acid water reducer. The water reducing agent has excellent water reducing effect and slump retaining property.
本发明属于减水剂技术领域，具体涉及一种改性聚羧酸减水剂及其制备方法。所述制备方法为：（1）将水加入到反应容器中，升温至70℃～90℃，加入聚乙二醇甲醚甲基丙烯酸酯和甲基丙烯酸，通入氮气保护；滴加引发剂，1h内滴加完成；继续搅拌进行共聚反应1h～4h得到聚羧酸盐减水剂初品；（2）往反应容器中加入溴化铜、十二碳醇酯和己二酸二甲酯，继续反应20min～50min，然后加入调节剂调节pH至8～9.5，得到改性聚羧酸减水剂。该减水剂具有优良的减水作用和保坍性。
Modified polycarboxylate superplasticizer and preparation method thereof
一种改性聚羧酸减水剂及其制备方法
LIU YUE (Autor:in)
01.03.2024
Patent
Elektronische Ressource
Chinesisch
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