Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Gemini imidazoline functional monomer, imidazoline type polycarboxylic acid water reducing agent and preparation methods of gemini imidazoline functional monomer and imidazoline type polycarboxylic acid water reducing agent
The invention discloses a gemini imidazoline functional monomer, an imidazoline type polycarboxylic acid water reducing agent and a preparation method of the gemini imidazoline functional monomer, a symmetric double-chain imidazoline functional monomer is prepared and grafted on a molecular side chain of the polycarboxylic acid water reducing agent, so that the steric hindrance of the polycarboxylic acid water reducing agent is increased, the dispersing capacity to cement particles is improved, and the water reducing rate is increased. The polycarboxylate superplasticizer is grafted with a gemini imidazoline functional group, so that the polycarboxylate superplasticizer can preferentially adsorb montmorillonoid in sand in concrete, the adsorption of a polycarboxylate polyether side chain is avoided, the mud resistance and slump retaining effects of the polycarboxylate superplasticizer are remarkably improved, and meanwhile, a sulfonic acid group is introduced into a quaternization reaction, so that the adsorption performance of the polycarboxylate superplasticizer is improved, and the water-reducing rate is increased. Therefore, the problems that a conventional polycarboxylate superplasticizer is poor in workability, high in mixing amount and large in loss when applied to artificial and poor-quality sand and stone materials with the high mud content are solved, the high mud-resistant effect is achieved, the mixing amount of the polycarboxylate superplasticizer is greatly reduced, and the effects of reducing cost, improving efficiency, saving energy and protecting the environment are achieved.
本发明公开了一种双子咪唑啉功能单体、咪唑啉型聚羧酸减水剂以及制备方法，通过制备对称双链的咪唑啉功能单体，并接枝在聚羧酸减水剂分子侧链上，增大了聚羧酸减水剂的空间位阻，提高对水泥颗粒的分散能力，增大减水率。由于接枝上双子咪唑啉功能基团，使其在混凝土中能够优先吸附砂中蒙脱土，避免对聚羧酸聚醚侧链的吸附，显著提升聚羧酸减水剂的抗泥和保坍效果，同时在季铵盐化反应中引入磺酸基，改善聚羧酸减水剂的吸附性能，提升减水率。因此，本发明解决了常规聚羧酸减水剂在应用于人工和劣质含泥量较高的沙石材料中和易性差、掺量高、损失大的问题，具有较强的抗泥效果，使得聚羧酸减水剂的掺量大幅度降低，起到降本增效、节能环保的作用。
Gemini imidazoline functional monomer, imidazoline type polycarboxylic acid water reducing agent and preparation methods of gemini imidazoline functional monomer and imidazoline type polycarboxylic acid water reducing agent
The invention discloses a gemini imidazoline functional monomer, an imidazoline type polycarboxylic acid water reducing agent and a preparation method of the gemini imidazoline functional monomer, a symmetric double-chain imidazoline functional monomer is prepared and grafted on a molecular side chain of the polycarboxylic acid water reducing agent, so that the steric hindrance of the polycarboxylic acid water reducing agent is increased, the dispersing capacity to cement particles is improved, and the water reducing rate is increased. The polycarboxylate superplasticizer is grafted with a gemini imidazoline functional group, so that the polycarboxylate superplasticizer can preferentially adsorb montmorillonoid in sand in concrete, the adsorption of a polycarboxylate polyether side chain is avoided, the mud resistance and slump retaining effects of the polycarboxylate superplasticizer are remarkably improved, and meanwhile, a sulfonic acid group is introduced into a quaternization reaction, so that the adsorption performance of the polycarboxylate superplasticizer is improved, and the water-reducing rate is increased. Therefore, the problems that a conventional polycarboxylate superplasticizer is poor in workability, high in mixing amount and large in loss when applied to artificial and poor-quality sand and stone materials with the high mud content are solved, the high mud-resistant effect is achieved, the mixing amount of the polycarboxylate superplasticizer is greatly reduced, and the effects of reducing cost, improving efficiency, saving energy and protecting the environment are achieved.
本发明公开了一种双子咪唑啉功能单体、咪唑啉型聚羧酸减水剂以及制备方法，通过制备对称双链的咪唑啉功能单体，并接枝在聚羧酸减水剂分子侧链上，增大了聚羧酸减水剂的空间位阻，提高对水泥颗粒的分散能力，增大减水率。由于接枝上双子咪唑啉功能基团，使其在混凝土中能够优先吸附砂中蒙脱土，避免对聚羧酸聚醚侧链的吸附，显著提升聚羧酸减水剂的抗泥和保坍效果，同时在季铵盐化反应中引入磺酸基，改善聚羧酸减水剂的吸附性能，提升减水率。因此，本发明解决了常规聚羧酸减水剂在应用于人工和劣质含泥量较高的沙石材料中和易性差、掺量高、损失大的问题，具有较强的抗泥效果，使得聚羧酸减水剂的掺量大幅度降低，起到降本增效、节能环保的作用。
Gemini imidazoline functional monomer, imidazoline type polycarboxylic acid water reducing agent and preparation methods of gemini imidazoline functional monomer and imidazoline type polycarboxylic acid water reducing agent
双子咪唑啉功能单体、咪唑啉型聚羧酸减水剂以及制备方法
SUN YOU (Autor:in) / CHEN WENLONG (Autor:in) / LI HANJIAN (Autor:in) / CHEN JIE (Autor:in) / FANG SHICHANG (Autor:in) / TIAN YINGBING (Autor:in)
14.07.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C07D
HETEROCYCLIC COMPOUNDS
,
Heterocyclische Verbindungen
/
C04B
Kalk
,
LIME
/
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
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