Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Polycarboxylate-type water reducer and preparation method thereof
The invention relates to the field of water reducers, and particularly discloses a polycarboxylate-type water reducer and a preparation method thereof. The polycarboxylate-type water reducer comprises HPEG, a small monomer, a chain transfer agent, an initiator and deionized water, and the small monomer comprises acrylic acid, hydroxyl acrylate and 2-acrylamide-2-methylpropanesulfonic acid; The preparation method comprises the following steps: mixing the HPEG with the deionized water, controlling the temperature to be 30-60 DEG C, continuously heating, adding a catalyst and an activator into the mixture of the HPEG and the deionized water, and stirring for 5-10 minutes to obtain a mixed solution I; dropwise adding an aqueous solution of the small monomer, the chain transfer agent and the initiator into the mixed solution I for 2-3 hours, and standing for 1-2 hours after finishing dropwise adding, so as to obtain a mixed solution II; and adding sodium hydroxide into the mixed solution II until the pH value of the mixed solution II reaches 5-7 to obtain the polycarboxylate-type water reducer. The polycarboxylate-type water reducer disclosed by the invention has the advantage of relatively good slump loss resistance.
本申请涉及减水剂领域，具体公开了一种聚羧酸系减水剂及其制备方法，聚羧酸系减水剂包括HPEG,小单体,链转移剂,引发剂,去离子水,小单体由丙烯酸、丙烯酸羟酯与2‑丙烯酰胺‑2‑甲基丙磺酸组成；其制备方法为：将HPEG与去离子水混合，控制温度为30~60℃持续加热,同时向HPEG与去离子水的混合物内加入催化剂与活化剂，并搅拌5~10min后获得混合液一；向混合液一中滴加小单体的水溶液、链转移剂与引发剂，滴加时间为2~3h，完成滴加后静置1~2h，得到混合液二；向混合液二中加入氢氧化钠至混合液二的pH达到5~7,即得聚羧酸系减水剂。本申请的聚羧酸系减水剂具有保坍性能较好的优点。
Polycarboxylate-type water reducer and preparation method thereof
The invention relates to the field of water reducers, and particularly discloses a polycarboxylate-type water reducer and a preparation method thereof. The polycarboxylate-type water reducer comprises HPEG, a small monomer, a chain transfer agent, an initiator and deionized water, and the small monomer comprises acrylic acid, hydroxyl acrylate and 2-acrylamide-2-methylpropanesulfonic acid; The preparation method comprises the following steps: mixing the HPEG with the deionized water, controlling the temperature to be 30-60 DEG C, continuously heating, adding a catalyst and an activator into the mixture of the HPEG and the deionized water, and stirring for 5-10 minutes to obtain a mixed solution I; dropwise adding an aqueous solution of the small monomer, the chain transfer agent and the initiator into the mixed solution I for 2-3 hours, and standing for 1-2 hours after finishing dropwise adding, so as to obtain a mixed solution II; and adding sodium hydroxide into the mixed solution II until the pH value of the mixed solution II reaches 5-7 to obtain the polycarboxylate-type water reducer. The polycarboxylate-type water reducer disclosed by the invention has the advantage of relatively good slump loss resistance.
本申请涉及减水剂领域，具体公开了一种聚羧酸系减水剂及其制备方法，聚羧酸系减水剂包括HPEG,小单体,链转移剂,引发剂,去离子水,小单体由丙烯酸、丙烯酸羟酯与2‑丙烯酰胺‑2‑甲基丙磺酸组成；其制备方法为：将HPEG与去离子水混合，控制温度为30~60℃持续加热,同时向HPEG与去离子水的混合物内加入催化剂与活化剂，并搅拌5~10min后获得混合液一；向混合液一中滴加小单体的水溶液、链转移剂与引发剂，滴加时间为2~3h，完成滴加后静置1~2h，得到混合液二；向混合液二中加入氢氧化钠至混合液二的pH达到5~7,即得聚羧酸系减水剂。本申请的聚羧酸系减水剂具有保坍性能较好的优点。
Polycarboxylate-type water reducer and preparation method thereof
一种聚羧酸系减水剂及其制备方法
DING ANWEI (Autor:in)
20.04.2021
Patent
Elektronische Ressource
Chinesisch
Fluorescent type polycarboxylate water reducer and preparation method thereof
| Europäisches Patentamt | 2020
| Europäisches Patentamt | 2024
Preparation method of ester type polycarboxylate water reducer
| Europäisches Patentamt | 2016
Reaction air-entraining type polycarboxylate water reducer and preparation method thereof
| Europäisches Patentamt | 2020