Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Novel retarding type high-performance water reducing agent and preparation method thereof
The invention belongs to the technical field of building materials, and particularly relates to a novel retarding type high-performance water reducing agent and a preparation method thereof. The product developed by the invention comprises carboxylic acid type waterborne polyurethane, wherein the carboxylic acid type waterborne polyurethane is obtained by carrying out a cross-linking reaction on isocyanate and a polycarboxylic acid water reducing agent; the carboxylic acid type waterborne polyurethane is subjected to a cross-linking reaction to form a three-dimensional cross-linked network; and the three-dimensional cross-linked network is filled with nano silicon dioxide. The preparation method comprises the steps of mixing a polycarboxylate superplasticizer and a chain extender, carrying out vacuum dehydration, adding isocyanate, dimethyl pyrrolidone and a catalyst, carrying out a heating reaction, adding a cross-linking agent and tetraethoxysilane, and continuing the heating reaction to obtain a mixed solution; and naturally cooling the mixed solution to 60-65 DEG C, and then adding alkali liquor for neutralization in a stirring state to obtain the product. The product obtained by the invention can effectively inhibit the adsorption and interference of clay on the water reducer in the use process of the product.
本发明属于建筑材料技术领域，具体涉及一种新型缓凝型高性能减水剂及其制备方法。本发明研制的产品包括羧酸型水性聚氨酯；其中所述羧酸型水性聚氨酯是由异氰酸酯和聚羧酸减水剂经交联反应得到；所述羧酸型水性聚氨酯经交联反应形成三维交联网络；所述三维交联网络内部填充有纳米二氧化硅。在制备时，先将聚羧酸减水剂、扩链剂混合后，真空脱水，再加入异氰酸酯、二甲基吡咯烷酮和催化剂，加热反应后，再加入交联剂和正硅酸乙酯，继续加热反应，得混合液；待混合液自然冷却至60‑65℃，于搅拌状态下加碱液中和，即得产品。本发明所得产品可以有效抑制在产品使用过程中，粘土对减水剂的吸附和干扰。
Novel retarding type high-performance water reducing agent and preparation method thereof
The invention belongs to the technical field of building materials, and particularly relates to a novel retarding type high-performance water reducing agent and a preparation method thereof. The product developed by the invention comprises carboxylic acid type waterborne polyurethane, wherein the carboxylic acid type waterborne polyurethane is obtained by carrying out a cross-linking reaction on isocyanate and a polycarboxylic acid water reducing agent; the carboxylic acid type waterborne polyurethane is subjected to a cross-linking reaction to form a three-dimensional cross-linked network; and the three-dimensional cross-linked network is filled with nano silicon dioxide. The preparation method comprises the steps of mixing a polycarboxylate superplasticizer and a chain extender, carrying out vacuum dehydration, adding isocyanate, dimethyl pyrrolidone and a catalyst, carrying out a heating reaction, adding a cross-linking agent and tetraethoxysilane, and continuing the heating reaction to obtain a mixed solution; and naturally cooling the mixed solution to 60-65 DEG C, and then adding alkali liquor for neutralization in a stirring state to obtain the product. The product obtained by the invention can effectively inhibit the adsorption and interference of clay on the water reducer in the use process of the product.
本发明属于建筑材料技术领域，具体涉及一种新型缓凝型高性能减水剂及其制备方法。本发明研制的产品包括羧酸型水性聚氨酯；其中所述羧酸型水性聚氨酯是由异氰酸酯和聚羧酸减水剂经交联反应得到；所述羧酸型水性聚氨酯经交联反应形成三维交联网络；所述三维交联网络内部填充有纳米二氧化硅。在制备时，先将聚羧酸减水剂、扩链剂混合后，真空脱水，再加入异氰酸酯、二甲基吡咯烷酮和催化剂，加热反应后，再加入交联剂和正硅酸乙酯，继续加热反应，得混合液；待混合液自然冷却至60‑65℃，于搅拌状态下加碱液中和，即得产品。本发明所得产品可以有效抑制在产品使用过程中，粘土对减水剂的吸附和干扰。
Novel retarding type high-performance water reducing agent and preparation method thereof
一种新型缓凝型高性能减水剂及其制备方法
HUANG YAN (Autor:in) / TANG YINQING (Autor:in) / YANG YANG (Autor:in) / MO PINJIANG (Autor:in) / LIANG GAORONG (Autor:in)
14.09.2021
Patent
Elektronische Ressource
Chinesisch
Retarding type water reducing agent and preparation method thereof
| Europäisches Patentamt | 2023
| Europäisches Patentamt | 2023
Retarding type high-efficiency water reducing agent and preparation method thereof
| Europäisches Patentamt | 2024
Retarding and slump retaining type water reducing agent and preparation method thereof
| Europäisches Patentamt | 2021