US 11,814,573 B2
Thermoplastic elastomer for profile control and water shutoff and method for preparing same
Yan Xue, Chengdu (SC); Chunquan Zhang, Chengdu (CN); Dan Huang, Chengdu (CN); Liang Li, Chengdu (CN); and Bing Wei, Chengdu (CN)
Filed by Southwest Petroleum University, Chengdu (CN)
Filed on Jul. 22, 2021, as Appl. No. 17/382,348.
Claims priority of application No. 2020110044158 (CN), filed on Sep. 22, 2020.
Prior Publication US 2022/0089935 A1, Mar. 24, 2022
Int. Cl. C09K 8/508 (2006.01); C09K 8/504 (2006.01); C08F 8/28 (2006.01)
CPC C09K 8/5083 (2013.01) [C08F 8/28 (2013.01); C09K 8/5045 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method for preparing a thermoplastic elastomer for profile control and water shutoff, comprising:
(1) weighing raw materials;
(2) dividing the water into two parts, adding the component A into the first pan of water, heating and stirring to prepare a solution, and cooling;
(3) dripping the strong acid into the cooled solution;
(4) dripping a second part of water and a hydrophobic modifier to the solution in sequence, heating and stirring after the dripping to obtain the thermoplastic elastomer;
wherein the raw materials comprise the following components by weight:
8-10 parts of a component A,
1-3 of a strong acid,
1-3 parts of a hydrophobic modifier, and
100-105 parts of water;
the component A is one of a polyethylene glycol, a polyvinyl methyl ether, a polyvinyl alcohol and a copolymer of acrylamide and acrylonitrile;
the strong acid is one of a concentrated hydrochloric acid and a concentrated sulfuric acid;
the hydrophobic modifier is one of a formaldehyde, an acetaldehyde, a propionaldehyde, a butyraldehyde, a β-propiolactone, a γ-butyrolactone, a δ-valerolactone, methyltriacetylsilane, a methyltrimethylsilane, a butyl acrylate, and an ethylene glycol dimethacrylate.