Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Reduction type polycarboxylic acid water reducer as well as preparation method and application thereof
The invention relates to a reduction type polycarboxylic acid water reducer as well as a preparation method and application thereof. The water reducer is prepared from the following raw materials: an unsaturated polyether macromonomer, an unsaturated acid monomer and a reduction type functional monomer, and further comprises an initiator, a chain transfer agent and deionized water, wherein the molar ratio of the unsaturated polyether macromonomer to the unsaturated acid monomer to the reduction type functional monomer is 1: (4-6): (2-5). Isopentenyl polyoxyethylene ether, the unsaturated acid monomer, the reduction type functional monomer, the chain transfer agent, the initiator and the deionized water are adopted, and the polycarboxylic acid water reducer with high water-reducing rate and excellent shrinkage-reducing performance is prepared by a free radical copolymerization method through molecular structure design. The water reducer is used for reducing the shrinkage rate of a cementing material, and the mixing amount of the water reducer in the cementing material is 0.1-0.2% of the mass of the cementing material. Compared with the prior art, the reduction type polycarboxylic acid water reducer has the advantages of low doping amount, excellent reduction effect, simple synthesis process, energy saving, environmental protection and the like.
本发明涉及一种减缩型聚羧酸系减水剂及其制备方法和应用，该减水剂的原材料包括不饱和聚醚大单体、不饱和酸类单体和减缩型功能单体。还包括引发剂、链转移剂和去离子水，所述的不饱和聚醚大单体、不饱和酸类单体及减缩型功能单体的摩尔比为1:(4‑6):(2‑5)。采用异戊烯基聚氧乙烯醚、不饱和酸类单体、减缩型功能单体、链转移剂、引发剂和去离子水，通过分子结构设计，利用自由基共聚法制备兼具高减水率和优良减缩性能的聚羧酸系减水剂。该减水剂应用于降低胶凝材料收缩率，该减水剂在胶凝材料中的掺量为胶凝材料质量的0.1‑0.2％。与现有技术相比，本发明具有掺量低，减缩效果优良，合成工艺简单、节能、环保等优点。
Reduction type polycarboxylic acid water reducer as well as preparation method and application thereof
The invention relates to a reduction type polycarboxylic acid water reducer as well as a preparation method and application thereof. The water reducer is prepared from the following raw materials: an unsaturated polyether macromonomer, an unsaturated acid monomer and a reduction type functional monomer, and further comprises an initiator, a chain transfer agent and deionized water, wherein the molar ratio of the unsaturated polyether macromonomer to the unsaturated acid monomer to the reduction type functional monomer is 1: (4-6): (2-5). Isopentenyl polyoxyethylene ether, the unsaturated acid monomer, the reduction type functional monomer, the chain transfer agent, the initiator and the deionized water are adopted, and the polycarboxylic acid water reducer with high water-reducing rate and excellent shrinkage-reducing performance is prepared by a free radical copolymerization method through molecular structure design. The water reducer is used for reducing the shrinkage rate of a cementing material, and the mixing amount of the water reducer in the cementing material is 0.1-0.2% of the mass of the cementing material. Compared with the prior art, the reduction type polycarboxylic acid water reducer has the advantages of low doping amount, excellent reduction effect, simple synthesis process, energy saving, environmental protection and the like.
本发明涉及一种减缩型聚羧酸系减水剂及其制备方法和应用，该减水剂的原材料包括不饱和聚醚大单体、不饱和酸类单体和减缩型功能单体。还包括引发剂、链转移剂和去离子水，所述的不饱和聚醚大单体、不饱和酸类单体及减缩型功能单体的摩尔比为1:(4‑6):(2‑5)。采用异戊烯基聚氧乙烯醚、不饱和酸类单体、减缩型功能单体、链转移剂、引发剂和去离子水，通过分子结构设计，利用自由基共聚法制备兼具高减水率和优良减缩性能的聚羧酸系减水剂。该减水剂应用于降低胶凝材料收缩率，该减水剂在胶凝材料中的掺量为胶凝材料质量的0.1‑0.2％。与现有技术相比，本发明具有掺量低，减缩效果优良，合成工艺简单、节能、环保等优点。
Reduction type polycarboxylic acid water reducer as well as preparation method and application thereof
一种减缩型聚羧酸系减水剂及其制备方法和应用
SUN ZHENPING (Autor:in) / GE HAOSHENG (Autor:in)
14.01.2022
Patent
Elektronische Ressource
Chinesisch
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