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:
Dec. 20, 2016
Filed:
Apr. 23, 2007
Daniel C. Visger, Mentor, OH (US);
Mark Davies, Belper, GB;
David Price, Littleover, GB;
Marina Baum, Bainbridge Township, Geauga County, OH (US);
Barton J. Schober, Perry, OH (US);
John R. Johnson, Euclid, OH (US);
Daniel C. Visger, Mentor, OH (US);
Mark Davies, Belper, GB;
David Price, Littleover, GB;
Marina Baum, Bainbridge Township, Geauga County, OH (US);
Barton J. Schober, Perry, OH (US);
John R. Johnson, Euclid, OH (US);
The Lubrizol Corporation, Wickliffe, OH (US);
Abstract
The invention provides a composition comprising: (a) a star polymer comprising: (i) a core portion comprising a polyvalent (meth)acrylic monomer, oligomer or polymer thereof or a polyvalent divinyl non-acrylic monomer, oligomer or polymer thereof; and (ii) at least two arms of polymerized alkyl(meth)acrylate ester; and (b) an oil of lubricating viscosity, wherein the core portion further comprises a functional group of formula (I):—CH—C(R)(C(═O)A)-Y—  (I)wherein Ris hydrogen, a linear or branched alkyl group containing 1 to 5 carbon atoms; A is nitrogen or oxygen; and Y is a free radical leaving group selected from the group consisting of one or more atoms or groups of atoms which may be transferred by a radical mechanism under the polymerization conditions, a halogen, an —O—N═ group and an —S—C(═S)— group. The invention further provides the use of the composition in an oil of lubricating viscosity as a dispersant, a viscosity modifier or a precursor to a dispersant viscosity modifier.