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:
Oct. 25, 2022
Filed:
Mar. 07, 2019
Exxonmobil Chemical Patents Inc., Houston, TX (US);
Jingwen Zhang, Houston, TX (US);
John R. Hagadorn, Houston, TX (US);
Jo Ann M. Canich, Houston, TX (US);
Peijun Jiang, Katy, TX (US);
Britni J. Brobey, Houston, TX (US);
Maksim Shivokhin, Houston, TX (US);
EXXONMOBIL CHEMICAL PATENTS INC., Baytown, TX (US);
Abstract
In some embodiments, ethylene-propylene branched copolymers are synthesized with pyridyldiamido catalysts and a chain transfer agent, and their performance as viscosity modifiers in oil are detailed. In some embodiments, the present disclosure provides for ethylene-propylene branched copolymers having a shear thinning onset of less than about 0.01 rad/s and an HTHS value of less than about 3.3. In some embodiments, the ethylene-propylene branched copolymer is used as a viscosity modifier in a lubricating composition and a fuel composition.