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Cross-linked ester-ether copolymerized polycarboxylic acid slump retaining agent and preparation method thereof
The invention discloses a cross-linked ester-ether copolymerized polycarboxylic acid slump retaining agent and a preparation method thereof. The cross-linked ester-ether copolymerized polycarboxylic acid slump retaining agent comprises the following raw material components: a polyether macromonomer, an esterification monomer, a cross-linking agent, a small monomer, an initiator, a chain transfer agent, a reducing agent, a catalyst and a polymerization inhibitor. The method comprises the following steps: preparing esterified macromonomers; then, subjecting the two kinds of esterification macromonomers with different molecular weights, a novel polyether macromonomer that is ethylene glycol monovinyl polyethylene glycol (EPEG), unsaturated acid, the cross-linking agent, the initiator, the chain transfer agent, the reducing agent and the like to aqueous solution free radical copolymerization and cross-linking to obtain a polycarboxylate water reducing agent having a three-dimensional stereoscopic network structure. Because of the special molecular structure, the water reducing agent has good concrete workability, excellent slump loss resistance and low sensitivity to machine-made sand.
本发明公开了一种交联型酯醚共聚聚羧酸保坍剂及其制备方法，其原料组分包括：聚醚大单体、酯化单体、交联剂、小单体、引发剂、链转移剂、还原剂、催化剂以及阻聚剂；本发明先制备酯化大单体，然后将不同分子量的两种酯化大单体，乙二醇单乙烯基聚乙二醇醚（EPEG）新型聚醚大单体，不饱和酸，交联剂，引发剂，链转移剂，还原剂等通过水溶液的自由基共聚和交联，得到具有三维空间立体网状结构的聚羧酸减水剂，因其特殊的分子结构，使其具备了良好的混凝土和易性，优异的保坍性能以及对机制砂的低敏感性。
Cross-linked ester-ether copolymerized polycarboxylic acid slump retaining agent and preparation method thereof
The invention discloses a cross-linked ester-ether copolymerized polycarboxylic acid slump retaining agent and a preparation method thereof. The cross-linked ester-ether copolymerized polycarboxylic acid slump retaining agent comprises the following raw material components: a polyether macromonomer, an esterification monomer, a cross-linking agent, a small monomer, an initiator, a chain transfer agent, a reducing agent, a catalyst and a polymerization inhibitor. The method comprises the following steps: preparing esterified macromonomers; then, subjecting the two kinds of esterification macromonomers with different molecular weights, a novel polyether macromonomer that is ethylene glycol monovinyl polyethylene glycol (EPEG), unsaturated acid, the cross-linking agent, the initiator, the chain transfer agent, the reducing agent and the like to aqueous solution free radical copolymerization and cross-linking to obtain a polycarboxylate water reducing agent having a three-dimensional stereoscopic network structure. Because of the special molecular structure, the water reducing agent has good concrete workability, excellent slump loss resistance and low sensitivity to machine-made sand.
本发明公开了一种交联型酯醚共聚聚羧酸保坍剂及其制备方法，其原料组分包括：聚醚大单体、酯化单体、交联剂、小单体、引发剂、链转移剂、还原剂、催化剂以及阻聚剂；本发明先制备酯化大单体，然后将不同分子量的两种酯化大单体，乙二醇单乙烯基聚乙二醇醚（EPEG）新型聚醚大单体，不饱和酸，交联剂，引发剂，链转移剂，还原剂等通过水溶液的自由基共聚和交联，得到具有三维空间立体网状结构的聚羧酸减水剂，因其特殊的分子结构，使其具备了良好的混凝土和易性，优异的保坍性能以及对机制砂的低敏感性。
Cross-linked ester-ether copolymerized polycarboxylic acid slump retaining agent and preparation method thereof
一种交联型酯醚共聚聚羧酸保坍剂及其制备方法
CHANG JIACHAO (author) / WANG NAN (author) / CHANG CHENCHONG (author) / HUANG TINGWEN (author) / DONG SHUANGFENG (author)
2020-08-14
Patent
Electronic Resource
Chinese
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