Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method and application of polyether macromonomer
The invention relates to the field of fine chemical synthesis, in particular to a preparation method and application of a polyether macromonomer. The preparation method of the polyether macromonomer comprises the following steps: reacting one or more of ethylene glycol vinyl ether, diethylene glycol vinyl ether or 4-hydroxybutyl vinyl ether with a catalyst A to obtain a product A, introducing ethylene oxide and propylene oxide to react to obtain a reaction intermediate, and reacting the reaction intermediate with a catalyst B to obtain the polyether macromonomer. Dehydrating the reacted product B, introducing ethylene oxide and epoxypropane, and reacting to obtain a reaction finished product; and adding a neutralizer and an adsorbent into the reaction finished product, stirring and filtering to obtain a final product. The preparation method is low in byproduct content, narrow in molecular weight distribution, high in double bond retention rate and large in relative molecular weight. The polyether macromonomer is applied to the preparation of synthesizing a polycarboxylic acid water reducing agent; the synthesized polycarboxylate superplasticizer is short in production period, low in mixing amount, high in water-reducing rate, good in concrete workability and good in fluidity retaining capacity.
本发明涉及精细化工合成领域，具体涉及一种聚醚大单体的制备方法及应用。聚醚大单体制备方法包括如下步骤：取乙二醇乙烯基醚、二乙二醇乙烯基醚或者4‑羟丁基乙烯基醚中一种或多种与催化剂A反应，得到产物A，再通入环氧乙烷和环氧丙烷反应得到反应中间体，再将反应中间体和催化剂B反应，然后将反应后的产物B经脱水后通入环氧乙烷和环氧丙烷反应得到反应成品；然后向反应成品中加入中和剂和吸附剂搅拌过滤得到最终产品。该制备方法副产品含量低，分子量分布窄，双键保留率高，相对分子量大。将这种聚醚大单体在合成聚羧酸减水剂制备中的应用；其合成的聚羧酸减水剂的生产周期短，具有掺量低，减水率高，混凝土和易性好，流动性保持能力好。
Preparation method and application of polyether macromonomer
The invention relates to the field of fine chemical synthesis, in particular to a preparation method and application of a polyether macromonomer. The preparation method of the polyether macromonomer comprises the following steps: reacting one or more of ethylene glycol vinyl ether, diethylene glycol vinyl ether or 4-hydroxybutyl vinyl ether with a catalyst A to obtain a product A, introducing ethylene oxide and propylene oxide to react to obtain a reaction intermediate, and reacting the reaction intermediate with a catalyst B to obtain the polyether macromonomer. Dehydrating the reacted product B, introducing ethylene oxide and epoxypropane, and reacting to obtain a reaction finished product; and adding a neutralizer and an adsorbent into the reaction finished product, stirring and filtering to obtain a final product. The preparation method is low in byproduct content, narrow in molecular weight distribution, high in double bond retention rate and large in relative molecular weight. The polyether macromonomer is applied to the preparation of synthesizing a polycarboxylic acid water reducing agent; the synthesized polycarboxylate superplasticizer is short in production period, low in mixing amount, high in water-reducing rate, good in concrete workability and good in fluidity retaining capacity.
本发明涉及精细化工合成领域，具体涉及一种聚醚大单体的制备方法及应用。聚醚大单体制备方法包括如下步骤：取乙二醇乙烯基醚、二乙二醇乙烯基醚或者4‑羟丁基乙烯基醚中一种或多种与催化剂A反应，得到产物A，再通入环氧乙烷和环氧丙烷反应得到反应中间体，再将反应中间体和催化剂B反应，然后将反应后的产物B经脱水后通入环氧乙烷和环氧丙烷反应得到反应成品；然后向反应成品中加入中和剂和吸附剂搅拌过滤得到最终产品。该制备方法副产品含量低，分子量分布窄，双键保留率高，相对分子量大。将这种聚醚大单体在合成聚羧酸减水剂制备中的应用；其合成的聚羧酸减水剂的生产周期短，具有掺量低，减水率高，混凝土和易性好，流动性保持能力好。
Preparation method and application of polyether macromonomer
一种聚醚大单体的制备方法及应用
PENG TAO (Autor:in) / RONG HONG (Autor:in) / XIANG HONGJUN (Autor:in)
22.11.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
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
/
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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