A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Super-early-strength polycarboxylate superplasticizer and preparation method thereof
The invention discloses a super-early-strength polycarboxylic acid water reducing agent and a preparation method thereof. The super-early-strength polycarboxylic acid water reducing agent has excellent adsorption capacity steric hindrance effect and higher water reducing capacity and viscosity reducing effect. Along with the proceeding of the hydration process, the pH value of the solution is gradually increased, the molecular disintegration and dispersion effects and the hydration inhibition effect of the polycarboxylic acid water reducer disappear, and the cement-based material is rapidly hydrated; meanwhile, core alcohol amine begins to be exposed, and the selective complexing effect of lone pair electrons of N on cement clinker ions further promotes cement clinker dissolution and accelerates the cement hydration process. According to the preparation method, triol amine is taken as an initiator, 2-(ethylene glycol-propyne)-2-oxo-1, 3, 2-dioxaphospholane small monomers, 2-(polyethylene glycol/polypropylene glycol monomethyl ether)-2-oxo-1, 3, 2-dioxaphospholane large monomers and lactone are taken as polymeric monomers, ring opening polymerization is carried out under an organic metal catalyst, and the polymer is prepared. Finally, a large amount of carboxyl is introduced into the structure through sulfydryl-alkynyl click reaction to serve as adsorption groups.
本发明公开了一种超早强聚羧酸减水剂及其制备方法，其具有优异的吸附能力空间位阻效应，更高减水能力和降粘效果；随着水化进程的进行，溶液pH逐渐升高，聚羧酸减水剂分子崩解，分散作用和水化抑制效应消失，水泥基材料进入快速水化；同时核心的醇胺开始暴露，N的孤对电子对水泥熟料离子选择性络合作用进一步促进了水泥熟料溶解加速水泥水化进程。制备方法以三醇胺作为起始剂，2‑（乙二醇‑丙炔）‑2‑氧‑1,3,2‑二氧磷杂环戊烷小单体、2‑（聚乙二醇/聚丙二醇单甲醚）‑2‑氧‑1,3,2‑二氧磷杂环戊烷大单体和内酯作为聚合单体，在有机金属催化剂下开环聚合，最后经巯基‑炔基点击反应在结构中引入大量的羧基作为吸附基团。
Super-early-strength polycarboxylate superplasticizer and preparation method thereof
The invention discloses a super-early-strength polycarboxylic acid water reducing agent and a preparation method thereof. The super-early-strength polycarboxylic acid water reducing agent has excellent adsorption capacity steric hindrance effect and higher water reducing capacity and viscosity reducing effect. Along with the proceeding of the hydration process, the pH value of the solution is gradually increased, the molecular disintegration and dispersion effects and the hydration inhibition effect of the polycarboxylic acid water reducer disappear, and the cement-based material is rapidly hydrated; meanwhile, core alcohol amine begins to be exposed, and the selective complexing effect of lone pair electrons of N on cement clinker ions further promotes cement clinker dissolution and accelerates the cement hydration process. According to the preparation method, triol amine is taken as an initiator, 2-(ethylene glycol-propyne)-2-oxo-1, 3, 2-dioxaphospholane small monomers, 2-(polyethylene glycol/polypropylene glycol monomethyl ether)-2-oxo-1, 3, 2-dioxaphospholane large monomers and lactone are taken as polymeric monomers, ring opening polymerization is carried out under an organic metal catalyst, and the polymer is prepared. Finally, a large amount of carboxyl is introduced into the structure through sulfydryl-alkynyl click reaction to serve as adsorption groups.
本发明公开了一种超早强聚羧酸减水剂及其制备方法，其具有优异的吸附能力空间位阻效应，更高减水能力和降粘效果；随着水化进程的进行，溶液pH逐渐升高，聚羧酸减水剂分子崩解，分散作用和水化抑制效应消失，水泥基材料进入快速水化；同时核心的醇胺开始暴露，N的孤对电子对水泥熟料离子选择性络合作用进一步促进了水泥熟料溶解加速水泥水化进程。制备方法以三醇胺作为起始剂，2‑（乙二醇‑丙炔）‑2‑氧‑1,3,2‑二氧磷杂环戊烷小单体、2‑（聚乙二醇/聚丙二醇单甲醚）‑2‑氧‑1,3,2‑二氧磷杂环戊烷大单体和内酯作为聚合单体，在有机金属催化剂下开环聚合，最后经巯基‑炔基点击反应在结构中引入大量的羧基作为吸附基团。
Super-early-strength polycarboxylate superplasticizer and preparation method thereof
一种超早强聚羧酸减水剂及其制备方法
WANG XUECHUAN (author) / LU TONG (author) / YU PENGCHENG (author) / QU HAOJIE (author) / ZHENG XIUBAO (author) / QIAN CHENG (author) / ZHENG CHUNYANG (author)
2023-09-22
Patent
Electronic Resource
Chinese
| European Patent Office | 2016
Super early strength polycarboxylate superplasticizer and preparation method thereof
| European Patent Office | 2021
Super-early-strength polycarboxylate superplasticizer and preparation method thereof
| European Patent Office | 2016
| European Patent Office | 2016
| European Patent Office | 2016