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Slump-retaining polycarboxylate superplasticizer and preparation method thereof
The invention discloses a slump-retaining polycarboxylate superplasticizer and a preparation method thereof, and belongs to the technical field of polycarboxylate superplasticizers. According to the invention, isopentenol polyoxyethylene ether (TPEG) is used as a large monomer, acrylic acid (AA) is used as a small monomer, the large monomer, the small monomer and hydroxyethyl acrylate (HEA) are subjected to a reaction under the action of a disilane coupling agent, a double initiator and a chain transfer agent, such that the high-molecular polymer is obtained. Wherein the large monomer TPEG is added at one time, the small monomer AA, the silane coupling agent, the HEA, the initiator and the chain transfer agent are dropwise added in batches, and the slump retaining type polycarboxylate superplasticizer prepared through the method has the more excellent slump retaining characteristic compared with a common polycarboxylate superplasticizer, can be used independently and can also be compounded with an existing polycarboxylate admixture for use, and the slump retaining type polycarboxylate superplasticizer is suitable for large-scale production. The technical problem of poor slump retaining property of a polycarboxylic acid admixture in the prior art is solved.
本发明公开了一种保坍型聚羧酸减水剂及其制备方法，属于聚羧酸减水剂技术领域。以异戊烯醇聚氧乙烯醚(TPEG)为大单体、丙烯酸(AA)为小单体，由大单体、小单体和丙烯酸羟乙酯(HEA)在双硅烷偶联剂、双引发剂和链转移剂的作用下反应制得。其中大单体TPEG一次性加入，小单体AA、硅烷偶联剂、HEA、引发剂和链转移剂分批滴加，通过本方法制备的保坍型聚羧酸减水剂具有比普通聚羧酸减水剂更加优异的保坍特性，既可以单独使用，也可以和现有聚羧酸外加剂复配使用，解决现有技术存在的聚羧酸外加剂保坍性差的技术难题。
Slump-retaining polycarboxylate superplasticizer and preparation method thereof
The invention discloses a slump-retaining polycarboxylate superplasticizer and a preparation method thereof, and belongs to the technical field of polycarboxylate superplasticizers. According to the invention, isopentenol polyoxyethylene ether (TPEG) is used as a large monomer, acrylic acid (AA) is used as a small monomer, the large monomer, the small monomer and hydroxyethyl acrylate (HEA) are subjected to a reaction under the action of a disilane coupling agent, a double initiator and a chain transfer agent, such that the high-molecular polymer is obtained. Wherein the large monomer TPEG is added at one time, the small monomer AA, the silane coupling agent, the HEA, the initiator and the chain transfer agent are dropwise added in batches, and the slump retaining type polycarboxylate superplasticizer prepared through the method has the more excellent slump retaining characteristic compared with a common polycarboxylate superplasticizer, can be used independently and can also be compounded with an existing polycarboxylate admixture for use, and the slump retaining type polycarboxylate superplasticizer is suitable for large-scale production. The technical problem of poor slump retaining property of a polycarboxylic acid admixture in the prior art is solved.
本发明公开了一种保坍型聚羧酸减水剂及其制备方法，属于聚羧酸减水剂技术领域。以异戊烯醇聚氧乙烯醚(TPEG)为大单体、丙烯酸(AA)为小单体，由大单体、小单体和丙烯酸羟乙酯(HEA)在双硅烷偶联剂、双引发剂和链转移剂的作用下反应制得。其中大单体TPEG一次性加入，小单体AA、硅烷偶联剂、HEA、引发剂和链转移剂分批滴加，通过本方法制备的保坍型聚羧酸减水剂具有比普通聚羧酸减水剂更加优异的保坍特性，既可以单独使用，也可以和现有聚羧酸外加剂复配使用，解决现有技术存在的聚羧酸外加剂保坍性差的技术难题。
Slump-retaining polycarboxylate superplasticizer and preparation method thereof
一种保坍型聚羧酸减水剂及其制备方法
PAN DENGKE (author) / JING XUDONG (author) / PAN SHENGHU (author)
2023-09-05
Patent
Electronic Resource
Chinese
Slump-retaining polycarboxylate superplasticizer and preparation method thereof
| European Patent Office | 2024
Slump-retaining polycarboxylate superplasticizer and preparation method thereof
| European Patent Office | 2024
Slump-retaining polycarboxylate superplasticizer and preparation method thereof
| European Patent Office | 2023
| European Patent Office | 2023
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