Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The invention is suitable for the technical field of concrete admixtures, and provides a preparation process of a polycarboxylate superplasticizer. The polycarboxylate superplasticizer based on vinylether is synthesized from maleic anhydride, maleic anhydride monoalkyl ester and 4-hydroxybutyl vinyl ether in a free radical copolymerization manner, and the polycarboxylate superplasticizer is a terpolymer containing alkyl ester side chains and has very good cement dispersing capacity and relatively strong clay tolerance. In addition, the ester group contained in the polycarboxylate superplasticizer also has good hydrophilicity, so that the cement dispersing capacity of the polycarboxylate superplasticizer is further improved. The polycarboxylate superplasticizer prepared by the invention also has the advantages of high water reducing rate, low mixing amount, good compatibility with cement, no corrosion to reinforcing steel bars, stable performance, no layering, no precipitation, no toxicity and no pollution, and can be used as an admixture for various types of concrete.
本发明适用于混凝土外加剂技术领域，提供了一种聚羧酸减水剂的制备工艺。本发明通过自由基共聚合的方式，以马来酸酐、马来酸酐单烷基酯和4‑羟丁基乙烯基醚合成了一种基于乙烯基醚的聚羧酸减水剂，该聚羧酸减水剂是一种含有烷基酯侧链的三元共聚物，其具有很好的水泥分散能力和较强的粘土耐受性。此外，其含有的酯基还具有很好的亲水性，使聚羧酸减水剂的水泥分散能力进一步提升。本发明制备的聚羧酸减水剂还具有减水率高、掺量低、与水泥相容性好、对钢筋无腐蚀性、性能稳定不分层、无沉淀、无毒无污染的优点，可作为多种混凝土的外加剂使用。
The invention is suitable for the technical field of concrete admixtures, and provides a preparation process of a polycarboxylate superplasticizer. The polycarboxylate superplasticizer based on vinylether is synthesized from maleic anhydride, maleic anhydride monoalkyl ester and 4-hydroxybutyl vinyl ether in a free radical copolymerization manner, and the polycarboxylate superplasticizer is a terpolymer containing alkyl ester side chains and has very good cement dispersing capacity and relatively strong clay tolerance. In addition, the ester group contained in the polycarboxylate superplasticizer also has good hydrophilicity, so that the cement dispersing capacity of the polycarboxylate superplasticizer is further improved. The polycarboxylate superplasticizer prepared by the invention also has the advantages of high water reducing rate, low mixing amount, good compatibility with cement, no corrosion to reinforcing steel bars, stable performance, no layering, no precipitation, no toxicity and no pollution, and can be used as an admixture for various types of concrete.
本发明适用于混凝土外加剂技术领域，提供了一种聚羧酸减水剂的制备工艺。本发明通过自由基共聚合的方式，以马来酸酐、马来酸酐单烷基酯和4‑羟丁基乙烯基醚合成了一种基于乙烯基醚的聚羧酸减水剂，该聚羧酸减水剂是一种含有烷基酯侧链的三元共聚物，其具有很好的水泥分散能力和较强的粘土耐受性。此外，其含有的酯基还具有很好的亲水性，使聚羧酸减水剂的水泥分散能力进一步提升。本发明制备的聚羧酸减水剂还具有减水率高、掺量低、与水泥相容性好、对钢筋无腐蚀性、性能稳定不分层、无沉淀、无毒无污染的优点，可作为多种混凝土的外加剂使用。
Preparation process of polycarboxylate superplasticizer
一种聚羧酸减水剂的制备工艺
27.10.2020
Patent
Elektronische Ressource
Chinesisch
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