Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Acetyl-terminated polyether macromonomer and preparation method thereof, and concrete water reducer and preparation method thereof
The invention relates to the technical field of concrete admixtures, in particular to an acetyl-terminated polyether macromonomer, a preparation method of the acetyl-terminated polyether macromonomer, a concrete water reducing agent and a preparation method of the concrete water reducing agent. The water reducer is formed by copolymerization of an acetyl-terminated polyether macromonomer, acrylic acid and a functional monomer C through a copolymerization reaction. According to the concrete water reducing agent prepared from the specific acetyl-terminated polyether macromonomer, the adsorption rate and the early adsorption capacity of the concrete water reducing agent on the surface of cement particles are remarkably improved, the adsorption capacity of the water reducing agent in the later stage can be kept at a high level, the cement paste dispersion time of cement using the water reducing agent is short, and the water reducing agent has a good water reducing effect. And under the condition that the same initial neat paste fluidity requirement is met, a small amount of the water reducing agent is needed, and the water reducing agent is high in dispersion speed, good in dispersion performance and good in slump retaining performance at low temperature.
本发明涉及混凝土外加剂技术领域，特别涉及一种乙酰基封端聚醚大单体及其制备方法、混凝土减水剂及其制备方法。该减水剂由乙酰基封端聚醚大单体、丙烯酸与功能单体C经共聚反应共聚而成。本发明采用特定乙酰基封端聚醚大单体制得的混凝土减水剂，其在水泥颗粒表面的吸附速率和早期吸附量得到显著提升，而且后期减水剂吸附量能保持在较高水平，使用该减水剂的水泥的净浆分散时间短，并且在达到相同初始净浆流动度要求下，需要的该减水剂少，该减水剂在低温下分散速度快，分散性能好，而且保坍性能良好。
Acetyl-terminated polyether macromonomer and preparation method thereof, and concrete water reducer and preparation method thereof
The invention relates to the technical field of concrete admixtures, in particular to an acetyl-terminated polyether macromonomer, a preparation method of the acetyl-terminated polyether macromonomer, a concrete water reducing agent and a preparation method of the concrete water reducing agent. The water reducer is formed by copolymerization of an acetyl-terminated polyether macromonomer, acrylic acid and a functional monomer C through a copolymerization reaction. According to the concrete water reducing agent prepared from the specific acetyl-terminated polyether macromonomer, the adsorption rate and the early adsorption capacity of the concrete water reducing agent on the surface of cement particles are remarkably improved, the adsorption capacity of the water reducing agent in the later stage can be kept at a high level, the cement paste dispersion time of cement using the water reducing agent is short, and the water reducing agent has a good water reducing effect. And under the condition that the same initial neat paste fluidity requirement is met, a small amount of the water reducing agent is needed, and the water reducing agent is high in dispersion speed, good in dispersion performance and good in slump retaining performance at low temperature.
本发明涉及混凝土外加剂技术领域，特别涉及一种乙酰基封端聚醚大单体及其制备方法、混凝土减水剂及其制备方法。该减水剂由乙酰基封端聚醚大单体、丙烯酸与功能单体C经共聚反应共聚而成。本发明采用特定乙酰基封端聚醚大单体制得的混凝土减水剂，其在水泥颗粒表面的吸附速率和早期吸附量得到显著提升，而且后期减水剂吸附量能保持在较高水平，使用该减水剂的水泥的净浆分散时间短，并且在达到相同初始净浆流动度要求下，需要的该减水剂少，该减水剂在低温下分散速度快，分散性能好，而且保坍性能良好。
Acetyl-terminated polyether macromonomer and preparation method thereof, and concrete water reducer and preparation method thereof
一种乙酰基封端聚醚大单体及其制备方法、混凝土减水剂及其制备方法
ZHANG XIAOFANG (Autor:in) / FANG YUNHUI (Autor:in) / LIN ZHIJUN (Autor:in) / KE YULIANG (Autor:in) / ZHONG LINA (Autor:in) / GUO YUANQIANG (Autor:in) / LIN TIANXING (Autor:in) / ZHANG JIAYAN (Autor:in) / WANG JIANGUO (Autor:in) / LIU JIANPO (Autor:in)
08.03.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C08G
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
,
Makromolekulare Verbindungen, anders erhalten als durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind
/
C04B
Kalk
,
LIME
/
C08F
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
,
Makromolekulare Verbindungen, erhalten durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind
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