A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Composite water reducer and preparation process thereof
The invention relates to the technical field of concrete water reducing agents, and particularly discloses a composite water reducing agent and a preparation process thereof. The invention relates to a preparation process of a composite water reducer. The preparation process comprises the following steps: S1, adding methacrylic acid, methoxy polyethylene glycol methacrylate and a functional monomer into a container according to a molar ratio of 1: (1-1.2): (3.5-5), and uniformly mixing; the functional monomers are at least two of fluorene carboxylic acid derivatives, carboxylic acid indanone and maleic anhydride; and S2, adding an initiator, a chain transfer agent and a reducing agent into the container in the step S1, reacting at 40-60 DEG C for 3-5 hours, and then adjusting the pH value to 7. The composite water reducing agent has the advantage of being good in stability.
本申请涉及混凝土减水剂技术领域，具体公开了一种复合型减水剂及其制备工艺。一种复合型减水剂的制备工艺，包括如下步骤：S1：将甲基丙烯酸、甲氧基聚乙二醇甲基丙烯酸酯、功能单体按摩尔比1:(1‑1.2):(3.5‑5)加入容器内混合均匀；所述功能单体为芴羧酸衍生物、羧酸茚酮、马来酸酐中的至少两种；S2：将引发剂、链转移剂、还原剂加入步骤S1的容器内，在40‑60℃条件下反应3‑5h，然后调节pH值为7即得。本申请的复合型减水剂具有稳定性好的优点。
Composite water reducer and preparation process thereof
The invention relates to the technical field of concrete water reducing agents, and particularly discloses a composite water reducing agent and a preparation process thereof. The invention relates to a preparation process of a composite water reducer. The preparation process comprises the following steps: S1, adding methacrylic acid, methoxy polyethylene glycol methacrylate and a functional monomer into a container according to a molar ratio of 1: (1-1.2): (3.5-5), and uniformly mixing; the functional monomers are at least two of fluorene carboxylic acid derivatives, carboxylic acid indanone and maleic anhydride; and S2, adding an initiator, a chain transfer agent and a reducing agent into the container in the step S1, reacting at 40-60 DEG C for 3-5 hours, and then adjusting the pH value to 7. The composite water reducing agent has the advantage of being good in stability.
本申请涉及混凝土减水剂技术领域，具体公开了一种复合型减水剂及其制备工艺。一种复合型减水剂的制备工艺，包括如下步骤：S1：将甲基丙烯酸、甲氧基聚乙二醇甲基丙烯酸酯、功能单体按摩尔比1:(1‑1.2):(3.5‑5)加入容器内混合均匀；所述功能单体为芴羧酸衍生物、羧酸茚酮、马来酸酐中的至少两种；S2：将引发剂、链转移剂、还原剂加入步骤S1的容器内，在40‑60℃条件下反应3‑5h，然后调节pH值为7即得。本申请的复合型减水剂具有稳定性好的优点。
Composite water reducer and preparation process thereof
一种复合型减水剂及其制备工艺
CHEN JIFANG (author) / HUANG JUNHUI (author)
2023-03-07
Patent
Electronic Resource
Chinese
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