A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Efficient alkali-resistant gypsum retarder and preparation method thereof
The invention belongs to the technical field of gypsum building materials and retarders, and particularly relates to an efficient alkali-resistant gypsum retarder and a preparation method thereof. According to the gypsum retarder, acrylic acid, a polyoxyethylene ether monomer and hydroxy acrylic resin are mixed to form a retarder component with medium and low molecular weight, the plasticity of gypsum mortar is improved, if a later use environment is a strong alkaline environment, through hydrolysis of ester bonds in hydroxyethyl acrylate/hydroxypropyl acrylate in a system under an alkaline condition, the plasticity of the gypsum mortar is improved, and the plasticity of the gypsum mortar is improved. Acid is formed again, and a continuous retarding effect is provided for the gypsum. The hydroxy acrylic resin, the sodium amino trimethylene phosphonate, the prepared initiator and the prepared chain transfer agent have certain enhancement effects on the mechanical properties such as delayed coagulation, fracture resistance and compression resistance of the gypsum. The prepared alkali-resistant gypsum retarder thoroughly solves the problems of large gypsum coagulation time loss, high retarder mixing amount and the like under the alkaline condition, and has great economic and practical values.
本发明属于石膏建材与缓凝剂的技术领域，具体涉及一种高效耐碱的石膏缓凝剂及其制备方法。本发明的石膏缓凝剂为采用丙烯酸、聚氧乙烯醚单体、羟基丙烯酸树脂混合形成中低分子量的缓凝剂组分，有助于提高石膏砂浆的塑性，若后期使用环境中为强碱性环境，通过体系中丙烯酸羟乙酯/丙烯酸羟丙酯中酯键在碱性条件下的水解，再次形成酸，为石膏提供持续缓凝作用。所采用的羟基丙烯酸树脂、氨基三亚甲基膦酸钠以及所制备的引发剂、链转移剂对于石膏的缓凝、抗折抗压等力学性能均有一定的增强效果。所制备的耐碱石膏缓凝剂，彻底解决了碱性条件下石膏凝结时间损失大，缓凝剂掺量高等问题，具有极大的经济和实用价值。
Efficient alkali-resistant gypsum retarder and preparation method thereof
The invention belongs to the technical field of gypsum building materials and retarders, and particularly relates to an efficient alkali-resistant gypsum retarder and a preparation method thereof. According to the gypsum retarder, acrylic acid, a polyoxyethylene ether monomer and hydroxy acrylic resin are mixed to form a retarder component with medium and low molecular weight, the plasticity of gypsum mortar is improved, if a later use environment is a strong alkaline environment, through hydrolysis of ester bonds in hydroxyethyl acrylate/hydroxypropyl acrylate in a system under an alkaline condition, the plasticity of the gypsum mortar is improved, and the plasticity of the gypsum mortar is improved. Acid is formed again, and a continuous retarding effect is provided for the gypsum. The hydroxy acrylic resin, the sodium amino trimethylene phosphonate, the prepared initiator and the prepared chain transfer agent have certain enhancement effects on the mechanical properties such as delayed coagulation, fracture resistance and compression resistance of the gypsum. The prepared alkali-resistant gypsum retarder thoroughly solves the problems of large gypsum coagulation time loss, high retarder mixing amount and the like under the alkaline condition, and has great economic and practical values.
本发明属于石膏建材与缓凝剂的技术领域，具体涉及一种高效耐碱的石膏缓凝剂及其制备方法。本发明的石膏缓凝剂为采用丙烯酸、聚氧乙烯醚单体、羟基丙烯酸树脂混合形成中低分子量的缓凝剂组分，有助于提高石膏砂浆的塑性，若后期使用环境中为强碱性环境，通过体系中丙烯酸羟乙酯/丙烯酸羟丙酯中酯键在碱性条件下的水解，再次形成酸，为石膏提供持续缓凝作用。所采用的羟基丙烯酸树脂、氨基三亚甲基膦酸钠以及所制备的引发剂、链转移剂对于石膏的缓凝、抗折抗压等力学性能均有一定的增强效果。所制备的耐碱石膏缓凝剂，彻底解决了碱性条件下石膏凝结时间损失大，缓凝剂掺量高等问题，具有极大的经济和实用价值。
Efficient alkali-resistant gypsum retarder and preparation method thereof
一种高效耐碱的石膏缓凝剂及其制备方法
WANG HUI (author) / DU HONGYU (author) / HUANG XIYUE (author)
2023-06-23
Patent
Electronic Resource
Chinese
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