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:
Jun. 08, 2021
Filed:
Jun. 27, 2017
China Petroleum & Chemical Corporation, Beijing, CN;
Research Institute of Petroleum Processing, Sinopec, Beijing, CN;
Yao Zhang, Beijing, CN;
Qinghua Duan, Beijing, CN;
Kecheng Wei, Beijing, CN;
Yinong Liu, Beijing, CN;
Hongwei Sun, Beijing, CN;
CHINA PETROLEUM & CHEMICAL CORPORATION, Beijing, CN;
RESEARCH INSTITUTE OF PETROLEUM PROCESSING, SINOPEC, Beijing, CN;
Abstract
A gradient copolymer comprises or consists of n polymer components. The n polymer components each independently represents an addition polymer of a monomer of the formula (I), and/or a mixture thereof, orthe n polymer components each independently comprises or consists essential of one or more structural units represented by the formula (I-1), The symbol n represents an integer within the closed interval [5, ∞]. The average side chain carbon number of the i-th polymer component as determined according to the nuclear magnetic resonance method is expressed as X, with the symbol i representing an arbitrary integer from 1 to n, the relationship X<X< . . . <X<Xholds.