A kind of temperature-resistant tackifier copolymerized association and preparation method thereof
A technology of associates and viscosifiers, applied in the field of drilling fluid polymers and their preparation, can solve the problem of no obvious improvement in salt and calcium resistance, and achieve high temperature and salt resistance
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Embodiment 1
[0062] Weigh 440g NaCl and dissolve it in 1650g deionized water; then weigh 28g DMAPS and 90g DMAM respectively and dissolve it in NaCl solution; 2 Deoxygenation was performed for 1 hour, while the temperature was raised to 55° C., kept for 30 minutes, then 0.45 g of ammonium persulfate was added, and an intermediate product was obtained after 2 hours of reaction. Then, 20 g of cationic polyamine 1 was dissolved in 100 g of deionized water to prepare a cationic polyamine solution, and then the cationic polyamine solution was added to the intermediate product, mixed evenly, and the temperature was raised to 65°C at the same time, and the reaction was continued for 4 hours. A precipitate was obtained by precipitation with acetone. After drying at 110°C for 24 hours, it was pulverized to obtain DMAPS / DMAM tackifier.
Embodiment 2
[0064] Weigh 112g CaCl 2 Dissolve in 910g deionized water; weigh 56g DMAPS and 78g DMAM respectively in CaCl 2 in the solution; fully dissolved and then transferred to the reactor, and N 2 Deoxygenation was performed for 1 hour, while the temperature was raised to 60° C., kept for 30 minutes, then 0.45 g of sodium persulfate was added, and the reaction was carried out for 1 hour to obtain an intermediate product. Then, 20 g of cationic polyamine 2 was dissolved in 100 g of deionized water to prepare a cationic polyamine solution, and then the cationic polyamine solution was added to the intermediate product, mixed evenly, and the temperature was raised to 70° C., and the reaction was continued for 3 hours. A precipitate was obtained by precipitation with acetone. After drying at 120°C for 24 hours, it was pulverized to obtain DMAPS / DMAM tackifier.
Embodiment 3
[0066] Weigh 40g AlCl 3 Dissolve in 660g deionized water; then weigh 84g DMAPS and 70g DMAM in AlCl 3 in the solution; fully dissolved and then transferred to the reactor, and N 2 Deoxygenation for 0.5h, while raising the temperature to 60°C, keeping for 30min, adding 0.54g of potassium persulfate, and reacting for 1.5h to obtain an intermediate product. Then, 25 g of cationic polyamine 3 was dissolved in 100 g of deionized water to prepare a cationic polyamine solution, and then the cationic polyamine solution was added to the intermediate product, mixed evenly, and the temperature was raised to 65°C at the same time, and the reaction was continued for 4 hours. A precipitate was obtained by precipitation with acetone. After drying at 120°C for 16 hours, it was pulverized to obtain DMAPS / DMAM tackifier.
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