Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Efficient preparation method of polycarboxylate water reducing agent
The invention discloses an efficient preparation method of a polycarboxylate water reducing agent. The preparation method comprises the following steps: preparing the following raw materials comprising methyl allyl polyethylene glycol HPEG2400, an auxiliary agent, a chain transfer agent, an initiator, deionized water and alkali liquor; adding the methyl allyl polyethylene glycol HPEG2400 into a reactor provided with a thermometer and a speed regulation stirrer, and adding the deionized water; stirring and heating the mixture, dropwise adding N,N-dimethylacetamide into the reactor, and dropwiseadding the auxiliary agent; after stirring, dropwise adding the chain transfer agent and the initiator, and stirring. The water reducing agent has the beneficial effects that the adsorption performance of the water reducing agent and the surfaces of cement particles is improved, the fluidity of cement is improved, the construction performance of cement concrete can be kept for a long time, the workability and the physical and mechanical properties of the cement concrete are improved, and the engineering quality is improved. The methyl allyl polyethylene glycol HPEG2400, the auxiliary agent, the chain transfer agent and the initiator are matched, so that the preparation process is simplified, and the preparation efficiency is improved.
本发明公开了一种聚羧酸减水剂的高效制备方法，所述制备方法如下：原料准备：甲基烯丙基聚乙二醇HPEG2400、助剂、链转移剂、引发剂、去离子水、碱液；在装有温度计、调速搅拌器、的反应器中加入甲基烯丙基聚乙二醇HPEG2400，并加入去离子水；搅拌并对其进行加热，向反应器中滴加N‑N二甲基乙酰胺，并滴加助剂；搅拌后，向其中滴加链转移剂、引发剂，并搅拌；本发明的有益效果是：有助于增大减水剂与水泥颗粒表面的吸附性能，增大水泥的流动性，使水泥混凝土能较长时间保持施工性能，改善水泥混凝土的和易性及物理力学性能，提高工程质量；本发明中，甲基烯丙基聚乙二醇HPEG2400、助剂、链转移剂、引发剂的搭配，简化了制备工序，提高了制备的效率。
Efficient preparation method of polycarboxylate water reducing agent
The invention discloses an efficient preparation method of a polycarboxylate water reducing agent. The preparation method comprises the following steps: preparing the following raw materials comprising methyl allyl polyethylene glycol HPEG2400, an auxiliary agent, a chain transfer agent, an initiator, deionized water and alkali liquor; adding the methyl allyl polyethylene glycol HPEG2400 into a reactor provided with a thermometer and a speed regulation stirrer, and adding the deionized water; stirring and heating the mixture, dropwise adding N,N-dimethylacetamide into the reactor, and dropwiseadding the auxiliary agent; after stirring, dropwise adding the chain transfer agent and the initiator, and stirring. The water reducing agent has the beneficial effects that the adsorption performance of the water reducing agent and the surfaces of cement particles is improved, the fluidity of cement is improved, the construction performance of cement concrete can be kept for a long time, the workability and the physical and mechanical properties of the cement concrete are improved, and the engineering quality is improved. The methyl allyl polyethylene glycol HPEG2400, the auxiliary agent, the chain transfer agent and the initiator are matched, so that the preparation process is simplified, and the preparation efficiency is improved.
本发明公开了一种聚羧酸减水剂的高效制备方法，所述制备方法如下：原料准备：甲基烯丙基聚乙二醇HPEG2400、助剂、链转移剂、引发剂、去离子水、碱液；在装有温度计、调速搅拌器、的反应器中加入甲基烯丙基聚乙二醇HPEG2400，并加入去离子水；搅拌并对其进行加热，向反应器中滴加N‑N二甲基乙酰胺，并滴加助剂；搅拌后，向其中滴加链转移剂、引发剂，并搅拌；本发明的有益效果是：有助于增大减水剂与水泥颗粒表面的吸附性能，增大水泥的流动性，使水泥混凝土能较长时间保持施工性能，改善水泥混凝土的和易性及物理力学性能，提高工程质量；本发明中，甲基烯丙基聚乙二醇HPEG2400、助剂、链转移剂、引发剂的搭配，简化了制备工序，提高了制备的效率。
Efficient preparation method of polycarboxylate water reducing agent
一种聚羧酸减水剂的高效制备方法
HAN YONG (Autor:in) / SONG WEI (Autor:in) / CHEN WEI (Autor:in) / FENG DAIBIN (Autor:in)
05.06.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
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
/
C04B
Kalk
,
LIME
/
C08K
Verwendung von anorganischen oder nichtmakromolekularen organischen Stoffen als Zusatzstoffe
,
USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS
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