A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The invention discloses a viscosity reduction type polycarboxylate superplasticizer and a preparation method thereof. The viscosity reduction type polycarboxylate superplasticizer is prepared from thefollowing components in parts by mass: 340 to 350 parts of a polyether macromonomer, 30 to 40 parts of maleic anhydride, 4 to 5 parts of sodium hypophosphite, 4 to 7 parts of an adhesion promoter, 3.0 to 6.0 parts of potassium persulfate, 0.5 to 0.8 part of a reducing agent and the balance of water, and the total mass is 1000 parts, and the solid content is about 40%. According to the invention,acrylic acid which is a synthetic raw material of a traditional polycarboxylate superplasticizer is replaced by the adhesion promoter, the adhesion promoter is used as a short side chain, and phosphoric acid and silane structures of the adhesion promoter have strong polarity, so that molecules of the superplasticizer are initially and firmly adsorbed on the surfaces of cement particles; free waterbetween a molecular chain and cement particles is discharged by using a maleic anhydride cyclic structure and a hydrophobic property, so that the content of free water in the system is increased andthe viscosity of the system is reduced.
本发明公开了一种降粘型聚羧酸减水剂及其制备方法，所述的降粘型聚羧酸减水剂由以下组分构成：340‑350份聚醚大单体、30‑40份马来酸酐、4‑5份次亚磷酸钠、4‑7份附着力促进剂、3.0‑6.0份过硫酸钾、0.5‑0.8份还原剂、其余为水，总质量1000份，固含量为40％左右。本发明将传统聚羧酸减水剂合成原料丙烯酸置换为附着力促进剂，以附着力促进剂为短侧链，其磷酸、硅烷结构具有强极性，使减水剂分子初始牢固吸附在水泥颗粒表面；并以马来酸酐环状结构和疏水特性排出分子链与水泥颗粒之间的自由水，增加体系中自由水含量降低体系粘度。
The invention discloses a viscosity reduction type polycarboxylate superplasticizer and a preparation method thereof. The viscosity reduction type polycarboxylate superplasticizer is prepared from thefollowing components in parts by mass: 340 to 350 parts of a polyether macromonomer, 30 to 40 parts of maleic anhydride, 4 to 5 parts of sodium hypophosphite, 4 to 7 parts of an adhesion promoter, 3.0 to 6.0 parts of potassium persulfate, 0.5 to 0.8 part of a reducing agent and the balance of water, and the total mass is 1000 parts, and the solid content is about 40%. According to the invention,acrylic acid which is a synthetic raw material of a traditional polycarboxylate superplasticizer is replaced by the adhesion promoter, the adhesion promoter is used as a short side chain, and phosphoric acid and silane structures of the adhesion promoter have strong polarity, so that molecules of the superplasticizer are initially and firmly adsorbed on the surfaces of cement particles; free waterbetween a molecular chain and cement particles is discharged by using a maleic anhydride cyclic structure and a hydrophobic property, so that the content of free water in the system is increased andthe viscosity of the system is reduced.
本发明公开了一种降粘型聚羧酸减水剂及其制备方法，所述的降粘型聚羧酸减水剂由以下组分构成：340‑350份聚醚大单体、30‑40份马来酸酐、4‑5份次亚磷酸钠、4‑7份附着力促进剂、3.0‑6.0份过硫酸钾、0.5‑0.8份还原剂、其余为水，总质量1000份，固含量为40％左右。本发明将传统聚羧酸减水剂合成原料丙烯酸置换为附着力促进剂，以附着力促进剂为短侧链，其磷酸、硅烷结构具有强极性，使减水剂分子初始牢固吸附在水泥颗粒表面；并以马来酸酐环状结构和疏水特性排出分子链与水泥颗粒之间的自由水，增加体系中自由水含量降低体系粘度。
Viscosity reduction type polycarboxylate superplasticizer and preparation method thereof
一种降粘型聚羧酸减水剂及其制备方法
2020-04-17
Patent
Electronic Resource
Chinese
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