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Method for synthesizing polycarboxylate superplasticizer through binary copolymerization of 6C polyether macromonomer under heterogeneous catalysis by cobalt oxide
The invention discloses a method for synthesizing a polycarboxylate superplasticizer through binary copolymerization of 6C polyether macromonomer under heterogeneous catalysis by cobalt oxide. The method is characterized by comprising the following steps: weighing raw materials including a macromonomer, a small monomer, a chain transfer agent, a reducing agent, an oxidizing agent, a catalyst and water, mixing the small monomers and the water to prepare a solution A, and mixing the reducing agent, the chain transfer agent and the water to prepare a solution B, adding the solution C into the solution B, wherein the macromonomer is diethylene glycol monovinyl ether; and adding the macromonomer and the water into a reactor with a thermometer, controlling a temperature to be 0-20 DEG C, adding the catalyst and the water, conducting stirring and mixing, adding the oxidizing agent and the water, performing mixing and stirring, dropwise adding the solution A and the solution B at a constant speed at the same time, and carrying out a heat-preserved reaction, wherein the total time of dropwise addition and reaction is 1-2 hours. The polycarboxylate superplasticizer prepared through binary copolymerization of 6C polyether macromonomer under heterogeneous catalysis by cobalt oxide is especially suitable for concrete preparation, and has the advantages of excellent cement dispersion performance and aging slump retaining performance, good compressive strength and durability, and strong practicability.
本发明公开了一种6C聚醚大单体的氧化钴非均相催化两元共聚合成聚羧酸减水剂的方法，其特征是步骤为：取原料大单体、小单体、链转移剂、还原剂、氧化剂、催化剂和水，将小单体与水混合配制成A液,将还原剂、链转移剂与水混合配制成B液，所述大单体为二乙二醇单乙烯基醚；将大单体和水加入到有温度计的反应器中，温度控制到0～20℃，加入催化剂和水搅拌混合，再加入氧化剂和水混合搅拌，再同时匀速滴加入A液和B液，滴加和保温反应的总时间为1～2h，即制得。本发明制得的6C聚醚大单体的氧化钴非均相催化两元共聚合成聚羧酸减水剂特别适合于混凝土配制，水泥分散性能和经时保坍性能优良、抗压强度和耐久性能好，实用性强。
Method for synthesizing polycarboxylate superplasticizer through binary copolymerization of 6C polyether macromonomer under heterogeneous catalysis by cobalt oxide
The invention discloses a method for synthesizing a polycarboxylate superplasticizer through binary copolymerization of 6C polyether macromonomer under heterogeneous catalysis by cobalt oxide. The method is characterized by comprising the following steps: weighing raw materials including a macromonomer, a small monomer, a chain transfer agent, a reducing agent, an oxidizing agent, a catalyst and water, mixing the small monomers and the water to prepare a solution A, and mixing the reducing agent, the chain transfer agent and the water to prepare a solution B, adding the solution C into the solution B, wherein the macromonomer is diethylene glycol monovinyl ether; and adding the macromonomer and the water into a reactor with a thermometer, controlling a temperature to be 0-20 DEG C, adding the catalyst and the water, conducting stirring and mixing, adding the oxidizing agent and the water, performing mixing and stirring, dropwise adding the solution A and the solution B at a constant speed at the same time, and carrying out a heat-preserved reaction, wherein the total time of dropwise addition and reaction is 1-2 hours. The polycarboxylate superplasticizer prepared through binary copolymerization of 6C polyether macromonomer under heterogeneous catalysis by cobalt oxide is especially suitable for concrete preparation, and has the advantages of excellent cement dispersion performance and aging slump retaining performance, good compressive strength and durability, and strong practicability.
本发明公开了一种6C聚醚大单体的氧化钴非均相催化两元共聚合成聚羧酸减水剂的方法，其特征是步骤为：取原料大单体、小单体、链转移剂、还原剂、氧化剂、催化剂和水，将小单体与水混合配制成A液,将还原剂、链转移剂与水混合配制成B液，所述大单体为二乙二醇单乙烯基醚；将大单体和水加入到有温度计的反应器中，温度控制到0～20℃，加入催化剂和水搅拌混合，再加入氧化剂和水混合搅拌，再同时匀速滴加入A液和B液，滴加和保温反应的总时间为1～2h，即制得。本发明制得的6C聚醚大单体的氧化钴非均相催化两元共聚合成聚羧酸减水剂特别适合于混凝土配制，水泥分散性能和经时保坍性能优良、抗压强度和耐久性能好，实用性强。
Method for synthesizing polycarboxylate superplasticizer through binary copolymerization of 6C polyether macromonomer under heterogeneous catalysis by cobalt oxide
一种6C聚醚大单体的氧化钴非均相催化两元共聚合成聚羧酸减水剂的方法
SHU DOUDOU (author) / SHU XUEJUN (author) / LIU CAILIN (author) / ZHANG HENGTONG (author) / REN XIANYAN (author) / YANG HAIJUN (author) / HE NIAN (author) / LUO SHUAI (author)
2021-08-27
Patent
Electronic Resource
Chinese
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