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:
Nov. 01, 2016
Filed:
Feb. 24, 2011
Justin August Langston, Kutztown, PA (US);
Jen-lung Wang, Villanova, PA (US);
Peter Moore, Glenside, PA (US);
Justin August Langston, Kutztown, PA (US);
Jen-Lung Wang, Villanova, PA (US);
Peter Moore, Glenside, PA (US);
Evonik Oil Additives GmbH, Darmstadt, DE;
Abstract
The present invention describes a polymer useful as viscosity index improver comprising units derived from one or more ethylenically unsaturated ester compounds of formula (I), where R is hydrogen or methyl, Rmeans a linear, branched or cyclic alkyl residue with 1-6 carbon atoms, Rand Rindependently represent hydrogen or a group of the formula —COOR', where R′ means hydrogen or a alkyl group with 1-6 carbon atoms, units of one or more ethylenically unsaturated ester compounds of formula (II), where R is hydrogen or methyl, Rmeans a 2-alkyl branched alkyl residue with 12-18 carbon atoms, Rand Rindependently are hydrogen or a group of the formula —COOR″, where R″ means hydrogen or an alkyl group with 12-18 carbon atoms, and units of one or more ethylenically unsaturated ester compounds of formula (III), where R is hydrogen or methyl, Rmeans a linear alkyl residue with 12-24 carbon atoms, Rand Rindependently are hydrogen or a group of the formula —COOR″, where R″ means hydrogen or an alkyl group with 12-24 carbon atoms wherein said polymer comprises at least 10% by weight units derived from one or more ethylenically unsaturated ester compounds of formula (I), based on the total weight of the polymer, said polymer comprises at least 10% by weight units derived from one or more ethylenically unsaturated ester compounds of formula (II), based on the total weight of the polymer, and said polymer comprises at least 10% by weight units derived from one or more ethylenically unsaturated ester compounds of formula (III), based on the total weight of the polymer.