Hydrophobic polymer graft modified acrylamide polymer and preparation method thereof
An acrylamide-based, hydrophobic polymer technology, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of temperature resistance, salt resistance, aging resistance and poor displacement effect, etc., to achieve enhanced oil recovery , improve the effect of heat resistance and salt resistance, not easy to curl
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Embodiment 1
[0020] Inject 0.10mol 1-hydroxyl-2,2,5-trimethyl-3-(1-phenylethoxy)-4-phenyl-3-azahexane, 0.12mol peroxide into the dry reaction flask Dicumylbenzene and 0.8mol N,N-dimethylacrylamide were reacted at 87°C for 6 hours, and isopropanol was added to terminate the reaction. After precipitation with ether, the hydrophobic association poly-N with a molecular weight of 770 was obtained. , N-dimethylacrylamide homopolymer. 0.08g of the obtained polymer and 2.2g of polyacrylamide with a viscosity-average molecular weight of 28.5 million were dispersed in 97g of potassium carbonate aqueous solution (pH=8.0) under strong stirring, and graft copolymerization occurred under the action of reflux , to obtain the graft modified polymer polyacrylamide- g - poly-N,N-dimethylacrylamide.
[0021] Use the following methods or standards to test the structure and performance of the grafted modified polyacrylamide obtained by the hydrophobic polymer: measure the intrinsic viscosity of the polymer a...
Embodiment 2
[0025] Inject 0.13mol 1-chloro-2,5-dimethyl-3-(1-phenylethoxy)-4-phenyl-3-azahexane, 0.15mol benzyl peroxide into the dry reaction flask Acyl and 0.25mol N-n-dodecyl acrylamide, after reacting at 75°C for 7 hours, adding isopropanol to terminate the reaction, and after precipitation with ether, a hydrophobic association type poly-N-n-dodecyl with a molecular weight of 500 was obtained. Alkylacrylamide homopolymer. The poly(acrylamide- r -2-acrylamido-2-methyl propane sulfonate) (degree of hydrolysis 18.2%), under strong stirring, dispersed in 98g potassium bicarbonate aqueous solution (pH=10.0), under reflux, contact occurred branch copolymerization reaction to obtain graft modified polymer poly(acrylamide- r -2-acrylamido-2-methylpropanesulfonate sodium)- g - Poly(N-n-dodecylacrylamide).
[0026] The structure and properties of the hydrophobic polymer graft-modified acrylamide polymer obtained were tested by the method or standard described in Example 1, and the analysis ...
Embodiment 3
[0029] Inject 0.11mol 1-amino-2,5,5-trimethyl-3-(1-phenylethoxy)-4-phenyl-3-azahexane, 0.125mol iso Propylbenzene hydroperoxide, 0.2mol N-tert-butylacrylamide and 0.1mol N-phenylacrylamide react at 92°C for 7 hours, then add isopropanol to terminate the reaction, and precipitate with ether to obtain a molecular weight of 350 Hydrophobic associative poly(N-tert-butylacrylamide- r -N-phenylacrylamide) random copolymer. 0.05 g of the obtained copolymer and 1.7 g of ultra-high molecular weight polyacrylamide with a viscosity-average molecular weight of 17.2 million were dispersed in 99 g of potassium hydroxide aqueous solution (pH=9.8) under the action of strong stirring, and contact occurred under the action of reflux. branch copolymerization reaction to obtain graft modified polymer polyacrylamide- g -Poly(N-tert-butylacrylamide- r -N-phenylacrylamide).
[0030] The structure and properties of the hydrophobic polymer graft-modified polyacrylamide obtained were tested by the ...
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