Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Polyfunctional group polycarboxylic acid water reducer and preparation method thereof
The invention discloses a polyfunctional group polycarboxylic acid water reducing agent and a preparation method thereof. The preparation method comprises the following steps: firstly, carrying out condensation polymerization on dihydric alcohol and dibasic acid to obtain a polyester prepolymer containing polyfunctional groups such as a benzene ring, a sulfonic group, an ester group, a hydroxyl group, a fluorine group and unsaturated double bonds; secondly, performing free radical polymerization reaction on the polyester prepolymer, a polyether macromonomer, unsaturated carboxylic acid and other substances under the action of an oxidizing agent, a reducing agent, a chain transfer agent and other substances to obtain the polycarboxylate superplasticizer. The polyfunctional group polycarboxylic acid water reducing agent prepared through condensation reaction and free radical polymerization reaction has various functional groups, good weather resistance and outstanding high temperature resistance, and has good fluidity, slump loss resistance and adaptability in concrete.
本发明公开一种多官能团聚羧酸减水剂及其制备方法，首先通过二元醇与二元酸进行缩聚反应得到含有苯环、磺酸基、酯基、羟基、氟基、不饱和双键等多官能团的聚酯预聚体，其次将聚酯预聚体与聚醚大单体、不饱和羧酸等物质在氧化剂、还原剂、链转移剂等物质作用下进行自由基聚合反应得到聚羧酸减水剂。本发明通过缩合反应与自由基聚合反应制备得到的多官能团聚羧酸减水剂，其具有官能团多样、耐候性好、耐高温性突出，在混凝土中具有良好的流动性、保坍性与适应性。
Polyfunctional group polycarboxylic acid water reducer and preparation method thereof
The invention discloses a polyfunctional group polycarboxylic acid water reducing agent and a preparation method thereof. The preparation method comprises the following steps: firstly, carrying out condensation polymerization on dihydric alcohol and dibasic acid to obtain a polyester prepolymer containing polyfunctional groups such as a benzene ring, a sulfonic group, an ester group, a hydroxyl group, a fluorine group and unsaturated double bonds; secondly, performing free radical polymerization reaction on the polyester prepolymer, a polyether macromonomer, unsaturated carboxylic acid and other substances under the action of an oxidizing agent, a reducing agent, a chain transfer agent and other substances to obtain the polycarboxylate superplasticizer. The polyfunctional group polycarboxylic acid water reducing agent prepared through condensation reaction and free radical polymerization reaction has various functional groups, good weather resistance and outstanding high temperature resistance, and has good fluidity, slump loss resistance and adaptability in concrete.
本发明公开一种多官能团聚羧酸减水剂及其制备方法，首先通过二元醇与二元酸进行缩聚反应得到含有苯环、磺酸基、酯基、羟基、氟基、不饱和双键等多官能团的聚酯预聚体，其次将聚酯预聚体与聚醚大单体、不饱和羧酸等物质在氧化剂、还原剂、链转移剂等物质作用下进行自由基聚合反应得到聚羧酸减水剂。本发明通过缩合反应与自由基聚合反应制备得到的多官能团聚羧酸减水剂，其具有官能团多样、耐候性好、耐高温性突出，在混凝土中具有良好的流动性、保坍性与适应性。
Polyfunctional group polycarboxylic acid water reducer and preparation method thereof
一种多官能团聚羧酸减水剂及其制备方法
CHEN WENHONG (Autor:in) / DENG LEI (Autor:in) / JIANG YU (Autor:in) / ZHANG BO (Autor:in) / YANG DIE (Autor:in) / KE NI (Autor:in) / HUANG XIAOWEN (Autor:in) / LUO XIAOFENG (Autor:in) / LYU CHANGWEI (Autor:in)
05.09.2023
Patent
Elektronische Ressource
Chinesisch
Composite polycarboxylic acid water reducer and preparation method thereof
| Europäisches Patentamt | 2023
Phosphonic acid group-containing polycarboxylic acid water reducer and preparation method thereof
| Europäisches Patentamt | 2021
Ester polycarboxylic acid water reducer and preparation method thereof
| Europäisches Patentamt | 2023
Preparation method of polycarboxylic acid water reducer
| Europäisches Patentamt | 2021
Ester polycarboxylic acid water reducer and preparation method thereof
| Europäisches Patentamt | 2023