| abstract |
The invention discloses a temperature-resistant and salt-resistant multi-polymerized thickener and a preparation method thereof. The thickening agent of the present invention is prepared by mixing acrylamide (AM), sodium 2-acrylamido-2-methylpropyl sulfonate (AMPS), vinylpyrrolidone (NVP), and acryloyl morpholine (ACMO) according to a certain proportion Mix uniformly, add an appropriate amount of redox initiator and water-soluble azo initiator, stir and react under constant temperature and oxygen-free conditions of 60-90°C, settle through solvent, cool and consolidate, air dry naturally, and then shear and pulverize to obtain temperature-resistant Salt-tolerant multipolymer thickener. The temperature-resistant and salt-resistant multipolymer thickening agent of the invention has the advantages of good salt resistance, hydrolysis resistance, temperature resistance and shear resistance. |