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A platform for research: civil engineering, architecture and urbanism
Crosslinking type polyether ester amide water reducing agent and preparation method thereof
The invention discloses a crosslinking type polyether ester amide water reducing agent and a preparation method thereof. According to the polyether ester amide water reducing agent obtained by the method, ester group crosslinking is adopted, when a system is strongly alkaline, part of ester groups are dissociated, a single-chain comb-shaped polycarboxylic acid structure, polyether amide and polyether polyol structure are gradually released, the concrete slump retaining capacity can be better through an amide structure, the water reducing agent has the early strength and slump retaining functions due to the fact that carboxyl and ester groups are monomers with the plasticity retaining function, dissociation is carried out step by step, water reducing agent molecules capable of being adsorbed by cement particles can be released within a long time, the initial flowability of cement can be improved, and the stability is kept for a long time.
本发明是一种聚醚酯酰胺类减水剂及其制备方法，利用本发明的方法得到的聚醚酯酰胺类减水剂，采用酯基交联，当体系呈强碱性时，部分酯基解离，逐步释放单链梳状聚羧酸结构、聚醚酰胺以及聚醚多元醇结构，酰胺结构可使混凝土坍落度保持能力更好，羧基和酯基为具有保塑功能的单体，使得该减水剂兼有早强和保坍功能，而解离逐步进行，可在性对较长的时间内释放可供水泥颗粒吸附的减水剂分子，可提高水泥的初始流动性，并较长时间内保持稳定。
Crosslinking type polyether ester amide water reducing agent and preparation method thereof
The invention discloses a crosslinking type polyether ester amide water reducing agent and a preparation method thereof. According to the polyether ester amide water reducing agent obtained by the method, ester group crosslinking is adopted, when a system is strongly alkaline, part of ester groups are dissociated, a single-chain comb-shaped polycarboxylic acid structure, polyether amide and polyether polyol structure are gradually released, the concrete slump retaining capacity can be better through an amide structure, the water reducing agent has the early strength and slump retaining functions due to the fact that carboxyl and ester groups are monomers with the plasticity retaining function, dissociation is carried out step by step, water reducing agent molecules capable of being adsorbed by cement particles can be released within a long time, the initial flowability of cement can be improved, and the stability is kept for a long time.
本发明是一种聚醚酯酰胺类减水剂及其制备方法，利用本发明的方法得到的聚醚酯酰胺类减水剂，采用酯基交联，当体系呈强碱性时，部分酯基解离，逐步释放单链梳状聚羧酸结构、聚醚酰胺以及聚醚多元醇结构，酰胺结构可使混凝土坍落度保持能力更好，羧基和酯基为具有保塑功能的单体，使得该减水剂兼有早强和保坍功能，而解离逐步进行，可在性对较长的时间内释放可供水泥颗粒吸附的减水剂分子，可提高水泥的初始流动性，并较长时间内保持稳定。
Crosslinking type polyether ester amide water reducing agent and preparation method thereof
一种交联型聚醚酯酰胺类减水剂及制备方法
ZHOU YUYING (author) / YU HONGBO (author) / WANG GUIHAI (author)
2021-09-10
Patent
Electronic Resource
Chinese
IPC:
C08F
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
,
Makromolekulare Verbindungen, erhalten durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind
/
C04B
Kalk
,
LIME
/
C08G
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
,
Makromolekulare Verbindungen, anders erhalten als durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind
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