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. 21, 2022
Filed:
Dec. 02, 2020
Infineum International Limited, Abingdon, GB;
Nga Nguyen, Scotch Plains, NJ (US);
Ronald Lewis, Glenmoore, PA (US);
Jun Xu, Parlin, NJ (US);
Ewan Galbraith, Brooklyn, NY (US);
Infineum International Limited, Oxford, GB;
Abstract
A comb copolymer viscosity modifier may be made by polymerization comprising at least, or consisting essentially of, the following monomers: (a) (optionally from 7.0 wt % to 18 wt %, by repeat units, of) a hydrogenated polybutadiene-based (alk)acrylate ester macromonomer; (b) (optionally from 33 wt % to 64 wt % or from 38 wt % to 58 wt %, by repeat units, of) a C-Calkyl (alk)acrylate ester monomer; (c) (optionally up to 35.0 wt %, by repeat units, of) a C-Calkyl (alk)acrylate ester monomer; and (d) (optionally from 3.0 wt % to 27 wt %, by repeat units, of) a C-Caryl, aralkyl, or alkaryl (alk)acrylate ester monomer, such that a sum of repeat units due to (c) plus (d) constitute at least 21.0 wt % of repeat units of the comb copolymer viscosity modifier. Lubricant compositions comprising the comb copolymer viscosity modifier, as well as uses thereof and methods for modifying viscosity and dispersancy, are also contemplated.