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A platform for research: civil engineering, architecture and urbanism
Low-temperature early-strength water reducing agent and preparation method thereof
The invention belongs to the technical field of preparation of water reducing agents, and discloses a low-temperature early-strength water reducing agent and a preparation method thereof. The preparation method comprises the following steps: firstly, carrying out Michael addition reaction on monomers obtained by amidation reaction and esterification reaction to obtain a polyester macromonomer, then carrying out free radical polymerization reaction on the polyester macromonomer, a polyether macromonomer, a carboxylic acid micromonomer and a sulfonic acid micromonomer, and then sequentially carrying out Hofmann degradation reaction and amidation reaction to carry out functional modification. And then carrying out a Thiol-ene reaction with thiolated trehalose to synthesize the low-temperature early-strength water reducing agent. The prepared low-temperature early-strength water reducing agent has the advantage of keeping good dispersing capacity in a low-temperature environment, is controllable in synthesis process, energy-saving and environment-friendly, can be applied to the field of concrete, can effectively solve the problems of poor working performance, slow early strength development and the like of concrete in the low-temperature environment, and has a wide application prospect.
本发明属于减水剂的制备技术领域，本发明公开了一种低温早强型减水剂及其制备方法。本发明通过先将酰胺化反应和酯化反应得到的单体进行迈克尔加成反应得到聚酯类大单体，再与聚醚类大单体、羧酸类小单体和磺酸类小单体发生自由基聚合反应，然后依次通过Hofmann降解反应、酰胺化反应进行功能性改性，而后与硫醇化海藻糖发生Thiol‑ene反应合成低温早强型减水剂。本发明所制备的低温早强型减水剂具有在低温环境下保持良好分散能力的优点，且合成工艺可控、节能环保，应用在混凝土领域能有效解决低温环境下混凝土工作性能差和早期强度发展缓慢等问题，具有广阔的应用前景。
Low-temperature early-strength water reducing agent and preparation method thereof
The invention belongs to the technical field of preparation of water reducing agents, and discloses a low-temperature early-strength water reducing agent and a preparation method thereof. The preparation method comprises the following steps: firstly, carrying out Michael addition reaction on monomers obtained by amidation reaction and esterification reaction to obtain a polyester macromonomer, then carrying out free radical polymerization reaction on the polyester macromonomer, a polyether macromonomer, a carboxylic acid micromonomer and a sulfonic acid micromonomer, and then sequentially carrying out Hofmann degradation reaction and amidation reaction to carry out functional modification. And then carrying out a Thiol-ene reaction with thiolated trehalose to synthesize the low-temperature early-strength water reducing agent. The prepared low-temperature early-strength water reducing agent has the advantage of keeping good dispersing capacity in a low-temperature environment, is controllable in synthesis process, energy-saving and environment-friendly, can be applied to the field of concrete, can effectively solve the problems of poor working performance, slow early strength development and the like of concrete in the low-temperature environment, and has a wide application prospect.
本发明属于减水剂的制备技术领域，本发明公开了一种低温早强型减水剂及其制备方法。本发明通过先将酰胺化反应和酯化反应得到的单体进行迈克尔加成反应得到聚酯类大单体，再与聚醚类大单体、羧酸类小单体和磺酸类小单体发生自由基聚合反应，然后依次通过Hofmann降解反应、酰胺化反应进行功能性改性，而后与硫醇化海藻糖发生Thiol‑ene反应合成低温早强型减水剂。本发明所制备的低温早强型减水剂具有在低温环境下保持良好分散能力的优点，且合成工艺可控、节能环保，应用在混凝土领域能有效解决低温环境下混凝土工作性能差和早期强度发展缓慢等问题，具有广阔的应用前景。
Low-temperature early-strength water reducing agent and preparation method thereof
低温早强型减水剂及其制备方法
2024-11-15
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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