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A platform for research: civil engineering, architecture and urbanism
Polycarboxylic acid slump retaining agent and preparation method thereof
The invention discloses a polycarboxylic acid slump retaining agent and a preparation method thereof, and relates to the technical field of building materials. The polycarboxylic acid slump retaining agent provided by the invention is prepared from the following components in parts by weight: 15.5 to 25 parts of acrylic acid, 25 to 45 parts of unsaturated acrylate, 1 to 10 parts of unsaturated sulfonate, 310 to 350 parts of polyoxyethylene ether macromonomer, 4 to 6 parts of chain transfer agent, 1.5 to 3 parts of initiator, 0.3 to 0.7 part of reducing agent, 4 to 6 parts of sodium hydroxide and 550 to 650 parts of water. A functional monomer with a steric hindrance effect and anions is introduced into the polycarboxylic acid slump retaining water reducing agent, hydroxyl anions are prevented from attacking ester groups, the hydrolysis speed of ester groups is slowed down, the peak value of the hydrolysis speed is reduced, and the hydrolysis time is prolonged, so that the slump retaining time is prolonged, and the performance of the polycarboxylic acid slump retaining agent is improved.
本发明公开了一种聚羧酸保坍剂及其制备方法，涉及建筑材料技术领域。本发明提供的聚羧酸保坍剂，按重量份数计，包括如下组分：丙烯酸15.5‑25份，不饱和丙烯酸酯25‑45份，不饱和磺酸盐1‑10份，聚氧乙烯醚大单体310‑350份，链转移剂4‑6份，引发剂1.5‑3份，还原剂0.3‑0.7份，氢氧化钠4‑6份，水550‑650份，本发明利用空间位阻及阴离子互斥原理，在聚羧酸保坍减水剂中引入具有空间位阻效应和带阴离子的功能单体，阻碍氢氧根负离子进攻酯基基团，减缓酯基水解速度，降低水解速度的峰值，延长水解的时间，从而提高保坍时间，改善聚羧酸保坍剂的性能。
Polycarboxylic acid slump retaining agent and preparation method thereof
The invention discloses a polycarboxylic acid slump retaining agent and a preparation method thereof, and relates to the technical field of building materials. The polycarboxylic acid slump retaining agent provided by the invention is prepared from the following components in parts by weight: 15.5 to 25 parts of acrylic acid, 25 to 45 parts of unsaturated acrylate, 1 to 10 parts of unsaturated sulfonate, 310 to 350 parts of polyoxyethylene ether macromonomer, 4 to 6 parts of chain transfer agent, 1.5 to 3 parts of initiator, 0.3 to 0.7 part of reducing agent, 4 to 6 parts of sodium hydroxide and 550 to 650 parts of water. A functional monomer with a steric hindrance effect and anions is introduced into the polycarboxylic acid slump retaining water reducing agent, hydroxyl anions are prevented from attacking ester groups, the hydrolysis speed of ester groups is slowed down, the peak value of the hydrolysis speed is reduced, and the hydrolysis time is prolonged, so that the slump retaining time is prolonged, and the performance of the polycarboxylic acid slump retaining agent is improved.
本发明公开了一种聚羧酸保坍剂及其制备方法，涉及建筑材料技术领域。本发明提供的聚羧酸保坍剂，按重量份数计，包括如下组分：丙烯酸15.5‑25份，不饱和丙烯酸酯25‑45份，不饱和磺酸盐1‑10份，聚氧乙烯醚大单体310‑350份，链转移剂4‑6份，引发剂1.5‑3份，还原剂0.3‑0.7份，氢氧化钠4‑6份，水550‑650份，本发明利用空间位阻及阴离子互斥原理，在聚羧酸保坍减水剂中引入具有空间位阻效应和带阴离子的功能单体，阻碍氢氧根负离子进攻酯基基团，减缓酯基水解速度，降低水解速度的峰值，延长水解的时间，从而提高保坍时间，改善聚羧酸保坍剂的性能。
Polycarboxylic acid slump retaining agent and preparation method thereof
一种聚羧酸保坍剂及其制备方法
ZHANG YANG (author) / WU GUOWEI (author) / ZHENG LIWEN (author) / HUANG RUIKANG (author) / MIAO GUANGHUI (author)
2024-07-02
Patent
Electronic Resource
Chinese
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