The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 13, 2022
Filed:
Jan. 05, 2022
Southwest Petroleum University, Chengdu, CN;
Yang Bai, Chengdu, CN;
Chunyan Liu, Chengdu, CN;
Pingya Luo, Chengdu, CN;
Gang Xie, Chengdu, CN;
Danchao Huang, Chengdu, CN;
Dezhi Liu, Chengdu, CN;
Hongbo Li, Chengdu, CN;
Daoxiong Li, Chengdu, CN;
Chaowei Hu, Chengdu, CN;
Southwest Petroleum University, Chengdu, CN;
Abstract
A method of preparing a modified polyvinyl acetate includes subjecting a mixed liquor Lcontaining a functional monomer to a first reaction with a first vinyl acetate monomer, followed by adding a first initiator to carry out a second reaction to obtain a mixed liquor L; subjecting an acrylate monomer, a second vinyl acetate monomer, a second initiator and the mixed liquor Lto carry out a third reaction to obtain a mixed liquor L; and subjecting a third initiator and the mixed liquor Lto carry out a fourth reaction under the air-tight and ultrasonic conditions. The functional monomer is selected from acrylic acid, oleic acid or butenedioic acid. Uses of modified polyvinyl acetate obtained by the method and oil-based drilling fluid containing the modified polyvinyl acetate are also disclosed.