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:
Sep. 06, 2011
Filed:
Nov. 06, 2007
John R. Johnson, Euclid, OH (US);
Daniel C. Visger, Mentor, OH (US);
Marina Baum, Chagrin Falls, OH (US);
Barton J. Schober, Perry, OH (US);
Ying Wang, Hudson, OH (US);
John R. Johnson, Euclid, OH (US);
Daniel C. Visger, Mentor, OH (US);
Marina Baum, Chagrin Falls, OH (US);
Barton J. Schober, Perry, OH (US);
Ying Wang, Hudson, OH (US);
The Lubrizol Corporation, Wickliffe, OH (US);
Abstract
The present invention provides a lubricating composition comprising: (a) an oil of lubricating viscosity; and (b) a crosslinked polymer derived from monomers comprising: (i) 0.001 wt % to 7 wt % of a di- or higher functional crosslinking monomer; (ii) 30 wt % or higher of a hydrocarbyl-substituted (meth)acrylic monomer, wherein each hydrocarbyl contains greater than 8 carbon atoms; and (iii) 0 wt % to 40 wt % of a hydrocarbyl-substituted (meth)acrylic monomer, wherein each hydrocarbyl contains 8 or fewer carbon atoms. The invention further provides a method of preparing the crosslinked polymer and its use in a lubricating composition for lubricating an internal combustion engine.