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High-temperature-resistant deep penetration molecular membrane acid copolymers and preparation methods thereof

The present disclosure provides a high-temperature-resistant deep penetration molecular membrane acid copolymer and a preparation method thereof. The copolymer is formed by polymerizing four raw monomers including 2-acrylamido-2-methylpropanesulphonic acid, vinyl phosphonic acid, alkyl dimethylallyl ammonium chloride, and perfluoropolyether acrylate. The method comprises: S1: mixing and stirring solvent oil, an emulsifier, the alkyl dimethyl allyl ammonium chloride, and the perfluoropolyether acrylate to be dispersed homogeneously to obtain an oil phase; S2: mixing and stirring the 2-acrylamido-2-methylpropanesulphonic acid, the vinyl phosphonic acid, a complexing agent, and distilled water, and adjusting pH to obtain an aqueous phase; S3: slowly dropwise adding the aqueous phase to the oil phase; and S4: introducing nitrogen into the water-in-oil emulsion to remove oxygen, then adding an initiator and carrying out a heating polymerization reaction to obtain copolymer emulsion (i.e., a molecular membrane agent). The copolymer emulsion is added to an acid solution to obtain molecular membrane acid.


» Number: US12234309B1 (B1)

» Publication Date: 25/02/2025

» Applicant: CHENGDU LEPS TECH CO LTD?[CN]; SOUTHWEST PETROLEUM UNIV?[CN]

» Inventor: GUO JIANCHUN?[CN]; LIU BIN?[CN] (10)

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