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. 30, 2014
Filed:
Jan. 24, 2013
Cognis Ip Management Gmbh, Düsseldorf, DE;
Markus Scherer, Mannheim, DE;
Dirk Rettemeyer, Hückelhoven, DE;
Cognis IP Management GmbH, Duesseldorf, DE;
Abstract
A process for improving the oxidation stability of lubricants including providing one or more esters containing branched alkyl groups which are reaction products of branched alcohols with a) one or more aliphatic dicarboxylic acids corresponding to general formula (II): HOOC—R—COOH in which Ris a branched or unbranched, saturated alkyl group containing 0 to 34 carbon atoms, or b) one or more saturated branched monocarboxylic acids corresponding to general formula (III): R—COOH in which Ris a branched alkyl group of 3 to 39 carbon atoms, or c) one or more saturated monocarboxylic acids corresponding to general formula (III) in which Ris a linear alkyl group of 3 to 29 carbon atoms, or d) a mixture thereof, as lubricants, with the proviso that the esters have an oxidation stability of 1000 hours or more, as determined by the Turbine Oil Stability Test (TOST test) to DIN EN ISO 4263-3.