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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 12163104 B1

PDFFull Text
Date of Patent:
Dec. 10, 2024

Filed:

Oct. 22, 2018

Bimodal copolymer compositions useful as oil modifiers and lubricating oils comprising the same

Applicant:

Chevron Oronite Company Llc, San Ramon, CA (US);

Inventors:

Ian G. Elliott, Vacaville, CA (US);

Maryam Sepehr, San Ramon, CA (US);

Sara Yue Zhang, Richmond, CA (US);

David Morgan, Pleasanton, CA (US);

Man Hon Tsang, Richmond, CA (US);

Rainer Kolb, Kingwood, TX (US);

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

Assignee:

Chevron Oronite Company LLC, San Ramon, CA (US);

Attorney:
Primary Examiner:

Taiwo Oladapo

Int. Cl.
CPC ...
C10M 143/00 (2006.01); C10M 143/02 (2006.01); C10M 143/04 (2006.01); C10M 143/06 (2006.01); C10M 143/08 (2006.01); C10M 149/02 (2006.01); C10M 169/04 (2006.01); C10N 20/00 (2006.01); C10N 20/04 (2006.01); C10N 30/00 (2006.01); C10N 40/04 (2006.01); C10N 40/08 (2006.01); C10N 40/10 (2006.01); C10N 40/25 (2006.01);
U.S. Cl.
CPC ...
C10M 143/04 (2013.01); C10M 143/02 (2013.01); C10M 143/06 (2013.01); C10M 143/08 (2013.01); C10M 149/02 (2013.01); C10M 169/041 (2013.01); C10M 2203/003 (2013.01); C10M 2205/022 (2013.01); C10M 2205/024 (2013.01); C10N 2020/019 (2020.05); C10N 2020/04 (2013.01); C10N 2030/68 (2020.05); C10N 2040/04 (2013.01); C10N 2040/042 (2020.05); C10N 2040/08 (2013.01); C10N 2040/10 (2013.01); C10N 2040/25 (2013.01);
Abstract

Lubricating oil compositions are provided which contain bimodal copolymer compositions, and in particular bimodal ethylene-α-olefin copolymer compositions. The copolymer compositions comprise first and second ethylene-α-olefin copolymer components. The bimodal compositions are particularly useful as viscosity or rheology modifiers, e.g., in lubricating oil compositions. Lubricating oil compositions comprising the copolymer compositions advantageously exhibit enhanced shear stability index (SSI) and thickening efficiency (TE) values, while maintaining excellent low-temperature properties such as pour point, mini-rotary viscometer viscosity, and cold crank simulation performance.

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