Heat-resistant and salt-resistant polymer thickening agent and preparation method thereof
A temperature-resistant, salt-resistant and thickener technology, applied in the field of polymers, can solve the problems of sewage solution stability, inability to adapt to temperature resistance of 90°C, and decline in temperature-resistant and salt-resistant performance, and achieves uncompromising synthesis conditions and high production efficiency. High efficiency and improved stability
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[0032] Example 1
[0033] 180 parts by mass of acrylamide (AM) and 20 parts of N-acetoxymaleimide represented by structural formula 1 were dissolved in 1000 parts of water under stirring.
[0034] [Structural formula 1]
[0035]
[0036] At room temperature, after deoxygenating the aqueous solution with nitrogen for 30 minutes, adjust the pH value of the solution to 9.2, add 0.02 parts of initiator 2,2-azobis(2-methylpropionamidine) hydrochloride (AIBA) under stirring, Reacting at a constant pressure of 60°C for 6 hours to obtain a colloidal polymer solution product. The product is dried, granulated and crushed to obtain a temperature-resistant and salt-resistant thickener product.
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[0037] Example 2
[0038] 120 parts by mass of acrylamide (AM), 60 parts of acrylic acid and 20 parts of N-hydroxymaleimide shown in structural formula 2 were dissolved in 1000 parts of water under stirring.
[0039] [Structural formula 2]
[0040]
[0041] At room temperature, after deoxygenating the aqueous solution with nitrogen for 30 minutes, adjust the pH of the solution to 9, add 0.01 parts of ammonium persulfate and 0.01 parts of sodium bisulfite as the redox initiation system under stirring, and react at a constant pressure at 30°C After 7 hours, a colloidal polymer solution product was obtained. The product is dried, granulated and crushed to obtain a temperature-resistant and salt-resistant thickener product.
Example Embodiment
[0042] Example 3
[0043] Dissolve 150 parts by mass of acrylamide (AM), 100 parts of N-vinylpyrrolidone (NVP) and 20 parts of sodium N-ethylsulfonate maleimide as shown in structural formula 3 under stirring In 1000 parts of water.
[0044] [Structural formula 3]
[0045]
[0046] At room temperature, after deoxygenating the aqueous solution with nitrogen for 30 minutes, adjust the pH of the solution to 8.9 and add 0.015 parts of the initiator 2,2-azobis(2-methylpropionamidine) hydrochloride (AIBA) while stirring. The reaction was kept at a normal pressure at 50°C for 6 hours to obtain a colloidal polymer solution product. The product is dried, granulated and crushed to obtain a temperature-resistant and salt-resistant thickener product.
[0047] Thickener product performance test
[0048] The performance of the obtained temperature-resistant and salt-resistant thickener product was compared with traditional polyacrylamide under the same conditions. The results are shown in Table 1 ...
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