Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Defoaming type polycarboxylate superplasticizer and preparation method thereof
The invention relates to the technical field of concrete admixtures, in particular to a defoaming type polycarboxylate superplasticizer and a preparation method thereof. The defoaming type polycarboxylate superplasticizer is prepared from a first esterification product and hydrogen-containing silicone oil through hydrosilation reaction. The first esterification product is prepared by esterifying a first polymer and grafting the first polymer with an unsaturated polyoxyethylene ether monomer. The first polymer is prepared from an unsaturated polyoxyethylene ether monomer, an acrylate monomer and unsaturated carboxylic acid through a copolymerization reaction. The defoaming type polycarboxylate superplasticizer provided by the invention has the functions of defoaming and foam inhibition while having a high water reducing effect, is high in defoaming capacity and good in stability, and effectively avoids the problem of poor gas content control effect caused by poor compatibility of compounding of the polycarboxylate superplasticizer and the defoaming agent and poor placement stability.
本发明涉及混凝土外加剂技术领域，特别涉及一种消泡型聚羧酸减水剂及其制备方法。所述消泡型聚羧酸减水剂由第一酯化产物和含氢硅油经硅氢化反应制得；所述第一酯化产物由第一聚合物酯化接枝不饱和聚氧乙烯醚单体制得；所述第一聚合物由不饱和聚氧乙烯醚单体、丙烯酸酯单体以及不饱和羧酸经共聚反应制得。本发明提供的消泡型聚羧酸减水剂在具有高减水效果的同时，还具有消泡和抑泡的功能，其消泡能力强、稳定性好，有效避免了聚羧酸减水剂与消泡剂二者复配带来的相容性差、放置稳定性差导致控制含气量效果不佳的问题。
Defoaming type polycarboxylate superplasticizer and preparation method thereof
The invention relates to the technical field of concrete admixtures, in particular to a defoaming type polycarboxylate superplasticizer and a preparation method thereof. The defoaming type polycarboxylate superplasticizer is prepared from a first esterification product and hydrogen-containing silicone oil through hydrosilation reaction. The first esterification product is prepared by esterifying a first polymer and grafting the first polymer with an unsaturated polyoxyethylene ether monomer. The first polymer is prepared from an unsaturated polyoxyethylene ether monomer, an acrylate monomer and unsaturated carboxylic acid through a copolymerization reaction. The defoaming type polycarboxylate superplasticizer provided by the invention has the functions of defoaming and foam inhibition while having a high water reducing effect, is high in defoaming capacity and good in stability, and effectively avoids the problem of poor gas content control effect caused by poor compatibility of compounding of the polycarboxylate superplasticizer and the defoaming agent and poor placement stability.
本发明涉及混凝土外加剂技术领域，特别涉及一种消泡型聚羧酸减水剂及其制备方法。所述消泡型聚羧酸减水剂由第一酯化产物和含氢硅油经硅氢化反应制得；所述第一酯化产物由第一聚合物酯化接枝不饱和聚氧乙烯醚单体制得；所述第一聚合物由不饱和聚氧乙烯醚单体、丙烯酸酯单体以及不饱和羧酸经共聚反应制得。本发明提供的消泡型聚羧酸减水剂在具有高减水效果的同时，还具有消泡和抑泡的功能，其消泡能力强、稳定性好，有效避免了聚羧酸减水剂与消泡剂二者复配带来的相容性差、放置稳定性差导致控制含气量效果不佳的问题。
Defoaming type polycarboxylate superplasticizer and preparation method thereof
一种消泡型聚羧酸减水剂及其制备方法
SHAO YOUZHE (Autor:in) / WU CHUANDENG (Autor:in) / LI GELI (Autor:in) / FANG YUNHUI (Autor:in) / ZHONG LINA (Autor:in)
27.04.2021
Patent
Elektronische Ressource
Chinesisch
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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