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Super absorbent resin for concrete mixture and preparation method of super absorbent resin
The invention discloses super absorbent resin for a concrete mixture and a preparation method of the super absorbent resin, the super absorbent resin is a three-dimensional network formed by crosslinking linear cyclic polycarboxylic acid, and the linear cyclic polycarboxylic acid is formed by randomly copolymerizing high-density carboxyl, cyclic lactone and polyethylene glycol vinyl ether. The preparation method comprises the following steps: dissolving acrylic acid or methacrylic acid, maleic acid, fumaric acid, a 2-vinyl ether ethyoxyl acrylate compound and polyethylene glycol vinyl ether in an organic solvent to prepare a low-concentration monomer solution; adding an initiator to react to obtain linear cyclic polycarboxylic acid; and adding polyether amine to react to obtain a micro-crosslinked cyclic polycarboxylic acid solution, and drying to obtain the super absorbent resin powder for the concrete mixture. The product has excellent water absorption capacity in cement-based high-alkalinity high-salt ion concentration, the problem that super absorbent resin loses efficacy due to rapid water release in the concrete mixing and construction process is solved, and meanwhile, free water can be slowly released according to the humidity change of a hardened concrete matrix, so that a long-term internal curing effect is achieved.
本发明公开一种混凝土拌合物用高吸水树脂及其制备方法，本产品为线性环聚羧酸交联构成的三维网络，其线性环聚羧酸是由高密度羧基、环内酯和聚乙二醇乙烯醚无规共聚组成。制备方法为将丙烯酸或甲基丙烯酸、马来酸、富马酸、2‑乙烯醚乙氧基丙烯酸酯类化合物、聚乙二醇乙烯醚溶解在有机溶剂中，溶解制备低浓度单体溶液；加入引发剂反应得到线性环聚羧酸；加入聚醚胺反应得到微交联的环聚羧酸溶液后干燥处理得到混凝土拌合物用高吸水树脂粉末。产品在水泥基的高碱性高盐离子浓度中具有优异的吸水能力，杜绝高吸水树脂在混凝土拌合和施工过程中快速释水而失效的问题，同时能根据硬化混凝土基体的湿度变化缓慢释放自由水，从而达到长久的内养护效果。
Super absorbent resin for concrete mixture and preparation method of super absorbent resin
The invention discloses super absorbent resin for a concrete mixture and a preparation method of the super absorbent resin, the super absorbent resin is a three-dimensional network formed by crosslinking linear cyclic polycarboxylic acid, and the linear cyclic polycarboxylic acid is formed by randomly copolymerizing high-density carboxyl, cyclic lactone and polyethylene glycol vinyl ether. The preparation method comprises the following steps: dissolving acrylic acid or methacrylic acid, maleic acid, fumaric acid, a 2-vinyl ether ethyoxyl acrylate compound and polyethylene glycol vinyl ether in an organic solvent to prepare a low-concentration monomer solution; adding an initiator to react to obtain linear cyclic polycarboxylic acid; and adding polyether amine to react to obtain a micro-crosslinked cyclic polycarboxylic acid solution, and drying to obtain the super absorbent resin powder for the concrete mixture. The product has excellent water absorption capacity in cement-based high-alkalinity high-salt ion concentration, the problem that super absorbent resin loses efficacy due to rapid water release in the concrete mixing and construction process is solved, and meanwhile, free water can be slowly released according to the humidity change of a hardened concrete matrix, so that a long-term internal curing effect is achieved.
本发明公开一种混凝土拌合物用高吸水树脂及其制备方法，本产品为线性环聚羧酸交联构成的三维网络，其线性环聚羧酸是由高密度羧基、环内酯和聚乙二醇乙烯醚无规共聚组成。制备方法为将丙烯酸或甲基丙烯酸、马来酸、富马酸、2‑乙烯醚乙氧基丙烯酸酯类化合物、聚乙二醇乙烯醚溶解在有机溶剂中，溶解制备低浓度单体溶液；加入引发剂反应得到线性环聚羧酸；加入聚醚胺反应得到微交联的环聚羧酸溶液后干燥处理得到混凝土拌合物用高吸水树脂粉末。产品在水泥基的高碱性高盐离子浓度中具有优异的吸水能力，杜绝高吸水树脂在混凝土拌合和施工过程中快速释水而失效的问题，同时能根据硬化混凝土基体的湿度变化缓慢释放自由水，从而达到长久的内养护效果。
Super absorbent resin for concrete mixture and preparation method of super absorbent resin
一种混凝土拌合物用高吸水树脂及其制备方法
WANG XUECHUAN (author) / LI SHUAI (author) / LU TONG (author) / YU PENGCHENG (author) / QU HAOJIE (author) / ZHENG XIUBAO (author) / QIAN CHENG (author) / LI WEI (author) / GAN JIEZHONG (author) / ZHENG CHUNYANG (author)
2024-05-07
Patent
Electronic Resource
Chinese
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