Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Medium-low molecular weight phosphonic acid-based water reducing agent as well as preparation method and application thereof
The invention provides a phosphonic acid-based water reducing agent with medium and low molecular weight and a preparation method and application thereof, the preparation method of the water reducing agent comprises the following steps: (1) preparation of a polyether intermediate: taking alkyl/naphthenic base/arylamine as an initiator, carrying out ring-opening polymerization reaction on the initiator and alkylene oxide under the action of a polymerization catalyst, continuously adding chlorohydrin after the reaction is finished, and carrying out heat preservation to obtain the polyether intermediate; carrying out quaternization reaction under the condition of a quaternization catalyst to obtain a polyether intermediate; and (2) preparation of the phosphonic acid-based water reducing agent with medium and low molecular weight: carrying out phosphonic esterification reaction on the polyether intermediate and a phosphonic acid reagent, adding water for dilution after the reaction is finished, and neutralizing with liquid alkali until the solid content is 50% and the pH value is 7, so as to obtain the phosphonic acid-based water reducing agent with medium and low molecular weight (brown liquid with certain viscosity). The low-molecular-weight phosphonic acid-based water reducer is simple in preparation process, high in production efficiency and excellent in product performance.
本发明提供了一种中低分子量膦酸基减水剂及其制备方法和应用，减水剂的制备方法，包括以下步骤：(1)聚醚中间体的制备：以烷基/环烷基/芳基胺为起始剂，在聚合催化剂下与环氧烷烃发生开环聚合反应，反应结束后继续加入氯代醇，在季铵化催化剂条件下发生季铵化反应得到聚醚中间体；(2)中低分子量膦酸基减水剂的制备：聚醚中间体与膦酸化试剂发生膦酸酯化反应，反应结束后加水稀释并液碱中和至固含为50％且pH＝7，得到中低分子量膦酸基减水剂(棕褐色具有一定粘度的液体)。本申请中低分子量膦酸基减水剂制备工艺简单、生产效率高、产品性能优异。
Medium-low molecular weight phosphonic acid-based water reducing agent as well as preparation method and application thereof
The invention provides a phosphonic acid-based water reducing agent with medium and low molecular weight and a preparation method and application thereof, the preparation method of the water reducing agent comprises the following steps: (1) preparation of a polyether intermediate: taking alkyl/naphthenic base/arylamine as an initiator, carrying out ring-opening polymerization reaction on the initiator and alkylene oxide under the action of a polymerization catalyst, continuously adding chlorohydrin after the reaction is finished, and carrying out heat preservation to obtain the polyether intermediate; carrying out quaternization reaction under the condition of a quaternization catalyst to obtain a polyether intermediate; and (2) preparation of the phosphonic acid-based water reducing agent with medium and low molecular weight: carrying out phosphonic esterification reaction on the polyether intermediate and a phosphonic acid reagent, adding water for dilution after the reaction is finished, and neutralizing with liquid alkali until the solid content is 50% and the pH value is 7, so as to obtain the phosphonic acid-based water reducing agent with medium and low molecular weight (brown liquid with certain viscosity). The low-molecular-weight phosphonic acid-based water reducer is simple in preparation process, high in production efficiency and excellent in product performance.
本发明提供了一种中低分子量膦酸基减水剂及其制备方法和应用，减水剂的制备方法，包括以下步骤：(1)聚醚中间体的制备：以烷基/环烷基/芳基胺为起始剂，在聚合催化剂下与环氧烷烃发生开环聚合反应，反应结束后继续加入氯代醇，在季铵化催化剂条件下发生季铵化反应得到聚醚中间体；(2)中低分子量膦酸基减水剂的制备：聚醚中间体与膦酸化试剂发生膦酸酯化反应，反应结束后加水稀释并液碱中和至固含为50％且pH＝7，得到中低分子量膦酸基减水剂(棕褐色具有一定粘度的液体)。本申请中低分子量膦酸基减水剂制备工艺简单、生产效率高、产品性能优异。
Medium-low molecular weight phosphonic acid-based water reducing agent as well as preparation method and application thereof
一种中低分子量膦酸基减水剂及其制备方法和应用
WANG TAO (Autor:in) / HAN ZHENG (Autor:in) / WANG BING (Autor:in) / HUANG ZHEN (Autor:in) / XIA ZHENGYI (Autor:in) / ZHANG JIANGANG (Autor:in) / ZHANG QIANQIAN (Autor:in) / SHU XIN (Autor:in) / RAN QIANPING (Autor:in)
24.05.2024
Patent
Elektronische Ressource
Chinesisch
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