A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Low-temperature rapid dispersing type polycarboxylate superplasticizer and preparation method thereof
The invention belongs to concrete admixtures, and particularly relates to a low-temperature rapid dispersing type polycarboxylate superplasticizer and a preparation method thereof. The preparation method comprises two main steps. The preparation method comprises the following steps: firstly, preparing multi-adsorption-group-terminated low-molecular-weight polyether A through transesterification, and secondly, carrying out copolymerization on the obtained polyether A, an allyl polyether macromonomer, an oxidizing agent, a reducing agent, a chain transfer agent and a chain extender, so as to obtain the low-temperature rapid dispersing type polycarboxylic acid water reducing agent. According to the preparation method, specific monomers and reaction conditions are used, so that the low-temperature rapid dispersion performance of the water reducing agent is realized, the finally obtained water reducing agent can be widely applied to preparation of various types of concrete, the working efficiency is improved, and the performance of the concrete is improved.
本发明属于混凝土外加剂，具体涉及一种低温快速分散型聚羧酸减水剂及其制备方法。本发明的制备方法包括两个主要步骤。首先是通过酯交换反应制备多吸附基团封端的低分子量聚醚A，其次是将得到的聚醚A与烯丙基聚醚大单体、氧化剂、还原剂、链转移剂和链增长剂进行共聚反应，得到低温快速分散型聚羧酸减水剂。该制备方法使用特定的单体和反应条件，以实现减水剂的低温快速分散性能，最终得到的减水剂可广泛应用于各种混凝土制备中，提高工作效率并改善混凝土的性能。
Low-temperature rapid dispersing type polycarboxylate superplasticizer and preparation method thereof
The invention belongs to concrete admixtures, and particularly relates to a low-temperature rapid dispersing type polycarboxylate superplasticizer and a preparation method thereof. The preparation method comprises two main steps. The preparation method comprises the following steps: firstly, preparing multi-adsorption-group-terminated low-molecular-weight polyether A through transesterification, and secondly, carrying out copolymerization on the obtained polyether A, an allyl polyether macromonomer, an oxidizing agent, a reducing agent, a chain transfer agent and a chain extender, so as to obtain the low-temperature rapid dispersing type polycarboxylic acid water reducing agent. According to the preparation method, specific monomers and reaction conditions are used, so that the low-temperature rapid dispersion performance of the water reducing agent is realized, the finally obtained water reducing agent can be widely applied to preparation of various types of concrete, the working efficiency is improved, and the performance of the concrete is improved.
本发明属于混凝土外加剂，具体涉及一种低温快速分散型聚羧酸减水剂及其制备方法。本发明的制备方法包括两个主要步骤。首先是通过酯交换反应制备多吸附基团封端的低分子量聚醚A，其次是将得到的聚醚A与烯丙基聚醚大单体、氧化剂、还原剂、链转移剂和链增长剂进行共聚反应，得到低温快速分散型聚羧酸减水剂。该制备方法使用特定的单体和反应条件，以实现减水剂的低温快速分散性能，最终得到的减水剂可广泛应用于各种混凝土制备中，提高工作效率并改善混凝土的性能。
Low-temperature rapid dispersing type polycarboxylate superplasticizer and preparation method thereof
一种低温快速分散型聚羧酸减水剂及其制备方法
LIN YANMEI (author) / CHEN ZHANHUA (author) / SHEN QIANG (author) / FANG YUNHUI (author) / GUO YUANQIANG (author) / ZHANG XIAOFANG (author) / LIN ZHIJUN (author) / LIN TIANXING (author) / YU FEIYU (author) / ZHU QIAOYONG (author)
2024-02-20
Patent
Electronic Resource
Chinese
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