IDiyas

For the Inventor, By the Inventor

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.:

US 11299567 B1

PDFFull Text
Date of Patent:
Apr. 12, 2022

Filed:

Jun. 14, 2017

Lubricating oil compositions comprising dual metallocene-catalyzed bimodal copolymer compositions useful as viscosity modifiers

Applicant:

Exxonmobil Chemical Patents Inc., Baytown, TX (US);

Inventors:

Jingwen Zhang, Houston, TX (US);

Rainer Kolb, Kingwood, TX (US);

Andy H. Tsou, Houston, TX (US);

Periagaram S. Ravishankar, Kingwood, TX (US);

Jo Ann M. Canich, Houston, TX (US);

Francis C. Rix, Houston, TX (US);

Assignee:

ExxonMobil Chemical Patents Inc., Baytown, TX (US);

Attorney:
Primary Examiner:

Prem C Singh

Assistant Examiner:

Francis C Campanell

Int. Cl.
CPC ...
C10L 1/16 (2006.01); C08F 210/16 (2006.01); C10M 143/04 (2006.01); C08F 4/6592 (2006.01); C10M 143/02 (2006.01); C10M 171/02 (2006.01); C10M 143/06 (2006.01); C10M 143/08 (2006.01); C10M 171/04 (2006.01); C08F 4/659 (2006.01); C10N 20/00 (2006.01); C10N 20/02 (2006.01); C10N 20/04 (2006.01); C10N 30/02 (2006.01); C10N 30/08 (2006.01); C10N 30/00 (2006.01); C10N 40/25 (2006.01); C10N 70/00 (2006.01);
U.S. Cl.
CPC ...
C08F 210/16 (2013.01); C08F 4/65927 (2013.01); C10M 143/02 (2013.01); C10M 143/04 (2013.01); C10M 143/06 (2013.01); C10M 143/08 (2013.01); C10M 171/02 (2013.01); C10M 171/04 (2013.01); C08F 4/65908 (2013.01); C08F 2500/02 (2013.01); C08F 2500/04 (2013.01); C08F 2500/05 (2013.01); C08F 2500/09 (2013.01); C08F 2500/17 (2013.01); C08F 2800/20 (2013.01); C10M 2205/022 (2013.01); C10M 2205/024 (2013.01); C10M 2205/026 (2013.01); C10M 2205/028 (2013.01); C10M 2205/0285 (2013.01); C10M 2207/289 (2013.01); C10M 2223/049 (2013.01); C10N 2020/01 (2020.05); C10N 2020/019 (2020.05); C10N 2020/02 (2013.01); C10N 2020/04 (2013.01); C10N 2020/069 (2020.05); C10N 2020/071 (2020.05); C10N 2030/02 (2013.01); C10N 2030/08 (2013.01); C10N 2030/54 (2020.05); C10N 2030/68 (2020.05); C10N 2040/25 (2013.01); C10N 2070/00 (2013.01);
Abstract

This application relates to copolymer compositions and copolymerization processes, as well as to lubricating oil compositions comprising such copolymer compositions as viscosity index improvers, and base oil. The copolymer compositions may be made using two different metallocene catalysts: one capable of producing high molecular weight copolymers; and one suitable for producing lower molecular weight copolymers having at least a portion of vinyl terminations, and the copolymer compositions produced thereby. Copolymer compositions may comprise (1) a first ethylene copolymer fraction having high molecular weight, exhibiting branching topology, and having relatively lower ethylene content (based on the weight of the first ethylene copolymer fraction); and (2) a second ethylene copolymer fraction having low molecular weight, exhibiting linear rheology, and having relatively higher ethylene content (based on the weight of the second ethylene copolymer fraction). Lubricating oil compositions comprising such copolymer compositions may exhibit superior viscosity properties.

Find Patent Forward Citations

Loading…