Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Process research and preparation of polycarboxylic acid high-performance retarding and water reducing agent
The invention relates to the technical field of retarding and water reducing agents, and discloses process research and preparation of a polycarboxylic acid high-performance retarding and water reducing agent. The hyperbranched polymer is synthesized from bromine-terminated hyperbranched poly (amine-ester), cuprous bromide, dipyridyl and acrylic acid, the polymer is of a star-shaped divergent molecular structure and can form a larger contact area with cement particles, and the polymer is grafted with more comb-shaped chain segments, so that the contact area with the cement particles is increased, and the adhesion between the polymer and the cement particles is improved. The bonding force between the water reducer and cement particles is improved, the steric hindrance effect of molecules is increased, the performance is excellent, agglomeration of the cement particles is prevented, the performance of the water reducer is greatly improved, the combination between the water reducer and the cement particles is firmer, and the defects that an existing water reducer is large in doping amount, poor in cement adaptability and the like are overcome. The water-reducing agent has the advantages of low mixing amount, high water-reducing rate, small slump loss, good compatibility with cement, strong anti-freezing capability and the like, and is stable in product performance, free of layering, free of precipitation, non-toxic and pollution-free after being stored for a long time.
本发明涉及缓凝减水剂技术领域，且公开了一种聚羧酸高性能缓凝减水剂的工艺研究及制备；本发明采用溴端基超支化聚(胺‑酯)、溴化亚铜、联吡啶、丙烯酸合成超支化聚合物，该聚合物为星形发散状的分子结构，能与水泥颗粒形成更大的接触面积，本聚合物接枝了更多的梳形链段，增加了与水泥颗粒的接触面积，提高了和水泥颗粒之间的键合力，增大了分子的空间位阻作用，性能优越，防止了水泥颗粒的团聚，减水剂的性能大大提高，减水剂和水泥颗粒间的结合更加地牢固，改善了现有减水剂掺加量大、水泥适应性差等缺点，具有掺量低、减水率高、坍落度损失小、与水泥相容性好、抗冻能力强等优点，产品性能稳定，长期储存不分层、无沉淀、无毒无污染。
Process research and preparation of polycarboxylic acid high-performance retarding and water reducing agent
The invention relates to the technical field of retarding and water reducing agents, and discloses process research and preparation of a polycarboxylic acid high-performance retarding and water reducing agent. The hyperbranched polymer is synthesized from bromine-terminated hyperbranched poly (amine-ester), cuprous bromide, dipyridyl and acrylic acid, the polymer is of a star-shaped divergent molecular structure and can form a larger contact area with cement particles, and the polymer is grafted with more comb-shaped chain segments, so that the contact area with the cement particles is increased, and the adhesion between the polymer and the cement particles is improved. The bonding force between the water reducer and cement particles is improved, the steric hindrance effect of molecules is increased, the performance is excellent, agglomeration of the cement particles is prevented, the performance of the water reducer is greatly improved, the combination between the water reducer and the cement particles is firmer, and the defects that an existing water reducer is large in doping amount, poor in cement adaptability and the like are overcome. The water-reducing agent has the advantages of low mixing amount, high water-reducing rate, small slump loss, good compatibility with cement, strong anti-freezing capability and the like, and is stable in product performance, free of layering, free of precipitation, non-toxic and pollution-free after being stored for a long time.
本发明涉及缓凝减水剂技术领域，且公开了一种聚羧酸高性能缓凝减水剂的工艺研究及制备；本发明采用溴端基超支化聚(胺‑酯)、溴化亚铜、联吡啶、丙烯酸合成超支化聚合物，该聚合物为星形发散状的分子结构，能与水泥颗粒形成更大的接触面积，本聚合物接枝了更多的梳形链段，增加了与水泥颗粒的接触面积，提高了和水泥颗粒之间的键合力，增大了分子的空间位阻作用，性能优越，防止了水泥颗粒的团聚，减水剂的性能大大提高，减水剂和水泥颗粒间的结合更加地牢固，改善了现有减水剂掺加量大、水泥适应性差等缺点，具有掺量低、减水率高、坍落度损失小、与水泥相容性好、抗冻能力强等优点，产品性能稳定，长期储存不分层、无沉淀、无毒无污染。
Process research and preparation of polycarboxylic acid high-performance retarding and water reducing agent
一种聚羧酸高性能缓凝减水剂的工艺研究及制备
XU TAIXIANG (Autor:in) / LI JILONG (Autor:in) / ZHANG JINGUI (Autor:in) / CHEN XI (Autor:in) / XIA LIWEI (Autor:in)
22.12.2023
Patent
Elektronische Ressource
Chinesisch
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