A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Preparation process of low-temperature polycarboxylic acid high-performance water reducing agent
The invention relates to a preparation process of a low-temperature polycarboxylic acid high-performance water reducing agent, which comprises the following steps: adding unsaturated polyether, a modified monomer and a molecular weight regulator into deionized water under a stirring condition, and dissolving to obtain a base solution; dropwise adding part of the acrylic acid aqueous solution into the base solution, then adding an initiator, stirring and reacting, and dropwise adding the rest acrylic acid aqueous solution to obtain a reaction solution; keeping the temperature of the reaction solution, and then adjusting the pH value to be neutral to obtain the polycarboxylic acid high-performance water reducing agent. The polycarboxylic acid high-performance water reducing agent is prepared from the following components in parts by mass: 32 to 40 parts of unsaturated polyether, 1.5 to 3.5 parts of acrylic acid, 14.6 to 18.5 parts of a modified monomer, 0.4 to 0.55 part of an initiator and 0.06 to 0.12 part of a molecular weight regulator, the molecular weight regulator comprises one of mercaptoacetic acid, mercaptopropionic acid and mercaptoethanol; the initiator comprises an oxidizing agent, a low-temperature catalyst and a reducing agent. The polycarboxylic acid high-performance water reducing agent has the effect of improving the stability, the water reducing performance and the mud resistance of a polycarboxylic acid high-performance water reducing agent product.
本申请涉及一种低温聚羧酸高性能减水剂制备工艺，包括如下步骤：在搅拌条件下将不饱和聚醚、改性单体和分子量调节剂加入至去离子水中，溶解后得到底液；将部分丙烯酸水溶液滴加至底液中，随后加入引发剂，搅拌反应后将剩余的丙烯酸水溶液滴加完毕，得到反应溶液；将反应溶液保温，随后调节pH至中性，得到聚羧酸高性能减水剂；所述聚羧酸高性能减水剂包括如下质量份数的组分：不饱和聚醚32‑40份，丙烯酸1.5‑3.5份，改性单体14.6‑18.5份，引发剂0.4‑0.55份，分子量调节剂0.06‑0.12份；所述分子量调节剂包括巯基乙酸、巯基丙酸和巯基乙醇中的一种；所述引发剂包括氧化剂、低温催化剂和还原剂。本申请具有提升聚羧酸高性能减水剂产品稳定性、减水性能和抗泥性能的效果。
Preparation process of low-temperature polycarboxylic acid high-performance water reducing agent
The invention relates to a preparation process of a low-temperature polycarboxylic acid high-performance water reducing agent, which comprises the following steps: adding unsaturated polyether, a modified monomer and a molecular weight regulator into deionized water under a stirring condition, and dissolving to obtain a base solution; dropwise adding part of the acrylic acid aqueous solution into the base solution, then adding an initiator, stirring and reacting, and dropwise adding the rest acrylic acid aqueous solution to obtain a reaction solution; keeping the temperature of the reaction solution, and then adjusting the pH value to be neutral to obtain the polycarboxylic acid high-performance water reducing agent. The polycarboxylic acid high-performance water reducing agent is prepared from the following components in parts by mass: 32 to 40 parts of unsaturated polyether, 1.5 to 3.5 parts of acrylic acid, 14.6 to 18.5 parts of a modified monomer, 0.4 to 0.55 part of an initiator and 0.06 to 0.12 part of a molecular weight regulator, the molecular weight regulator comprises one of mercaptoacetic acid, mercaptopropionic acid and mercaptoethanol; the initiator comprises an oxidizing agent, a low-temperature catalyst and a reducing agent. The polycarboxylic acid high-performance water reducing agent has the effect of improving the stability, the water reducing performance and the mud resistance of a polycarboxylic acid high-performance water reducing agent product.
本申请涉及一种低温聚羧酸高性能减水剂制备工艺，包括如下步骤：在搅拌条件下将不饱和聚醚、改性单体和分子量调节剂加入至去离子水中，溶解后得到底液；将部分丙烯酸水溶液滴加至底液中，随后加入引发剂，搅拌反应后将剩余的丙烯酸水溶液滴加完毕，得到反应溶液；将反应溶液保温，随后调节pH至中性，得到聚羧酸高性能减水剂；所述聚羧酸高性能减水剂包括如下质量份数的组分：不饱和聚醚32‑40份，丙烯酸1.5‑3.5份，改性单体14.6‑18.5份，引发剂0.4‑0.55份，分子量调节剂0.06‑0.12份；所述分子量调节剂包括巯基乙酸、巯基丙酸和巯基乙醇中的一种；所述引发剂包括氧化剂、低温催化剂和还原剂。本申请具有提升聚羧酸高性能减水剂产品稳定性、减水性能和抗泥性能的效果。
Preparation process of low-temperature polycarboxylic acid high-performance water reducing agent
一种低温聚羧酸高性能减水剂制备工艺
FAN SHENGMAO (author) / GUO WENBIN (author) / YANG PENGFEI (author) / WANG SHENG (author) / GAO DUQIN (author)
2024-03-29
Patent
Electronic Resource
Chinese
| European Patent Office | 2021
Polycarboxylic acid high-performance water reducing agent and preparation process thereof
| European Patent Office | 2022
Preparation method of polycarboxylic acid high-performance water reducing agent
| European Patent Office | 2023
Polycarboxylic acid high-performance water reducing agent and preparation method thereof
| European Patent Office | 2016