Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Saccharide-based water reducing agent and preparation method thereof
The invention discloses a saccharide-based water reducing agent and a preparation method thereof. The saccharide-based water reducing agent is of a hyperbranched structure, wherein firstly short polyether side chains with adjustable hydrophilicity and hydrophobicity are grafted to polyhydroxy saccharide monomers, then the hyperbranched structure is formed through cross-linking of a phosphate esterification reaction, and finally carboxylic acid adsorption groups are grafted to the tail ends of part of the polyether side chains through a carboxylic acid esterification reaction. According to theinvention, a short polyether side chain is introduced into hydroxyl of a saccharide monomer through ethoxylation reaction; the slow setting workability characteristic of the saccharide monomer is reserved, polyether prepared from the saccharide monomer introduced with the polyether side chain is easily flowing liquid at room temperature or after being heated, and the reaction efficiency and the reaction effect with a cross-linking agent, acid anhydride and the like are improved.
本发明公开了一种糖基减水剂及其制备方法。本发明所述糖基减水剂为超支化结构，首先在多羟基的糖类单体上接枝亲疏水性能可调的短聚醚侧链，然后通过磷酸酯化反应交联成超支化结构，最后通过羧酸酯化反应在部分聚醚侧链末端接枝羧酸吸附基团。本发明在糖类单体的羟基上通过乙氧基化反应引入短聚醚侧链，不仅保留了糖类单体本身的缓凝和和易性特性，而且引入聚醚侧链的糖类单体制备的聚醚在室温下或者加热后为容易流动的液体，提高了与交联剂和酸酐等的反应效率和反应效果。
Saccharide-based water reducing agent and preparation method thereof
The invention discloses a saccharide-based water reducing agent and a preparation method thereof. The saccharide-based water reducing agent is of a hyperbranched structure, wherein firstly short polyether side chains with adjustable hydrophilicity and hydrophobicity are grafted to polyhydroxy saccharide monomers, then the hyperbranched structure is formed through cross-linking of a phosphate esterification reaction, and finally carboxylic acid adsorption groups are grafted to the tail ends of part of the polyether side chains through a carboxylic acid esterification reaction. According to theinvention, a short polyether side chain is introduced into hydroxyl of a saccharide monomer through ethoxylation reaction; the slow setting workability characteristic of the saccharide monomer is reserved, polyether prepared from the saccharide monomer introduced with the polyether side chain is easily flowing liquid at room temperature or after being heated, and the reaction efficiency and the reaction effect with a cross-linking agent, acid anhydride and the like are improved.
本发明公开了一种糖基减水剂及其制备方法。本发明所述糖基减水剂为超支化结构，首先在多羟基的糖类单体上接枝亲疏水性能可调的短聚醚侧链，然后通过磷酸酯化反应交联成超支化结构，最后通过羧酸酯化反应在部分聚醚侧链末端接枝羧酸吸附基团。本发明在糖类单体的羟基上通过乙氧基化反应引入短聚醚侧链，不仅保留了糖类单体本身的缓凝和和易性特性，而且引入聚醚侧链的糖类单体制备的聚醚在室温下或者加热后为容易流动的液体，提高了与交联剂和酸酐等的反应效率和反应效果。
Saccharide-based water reducing agent and preparation method thereof
一种糖基减水剂及其制备方法
ZHANG ZHIYONG (Autor:in) / RAN QIANPING (Autor:in) / HUANG ZHEN (Autor:in) / YANG YONG (Autor:in) / ZHANG JIANGANG (Autor:in) / WANG LIANG (Autor:in) / WANG XIUMEI (Autor:in) / WANG TAO (Autor:in)
07.07.2020
Patent
Elektronische Ressource
Chinesisch
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