Esters comprising branched alkyl groups as lubricants

US8921289B2 · kind B2 · utility

Assignee

• Cognis IP Management GmbH · DE

Inventors

• Markus Scherer · Lebach, DE
• Dirk Rettemeyer · Hückelhoven, DE

Key dates

• Filing date: Jan 24, 2013
• Grant date: Dec 30, 2014
• Expiry date: Jan 24, 2033

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10N2040/30
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

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—R2—COOH in which R2 is 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): R3—COOH in which R3 is 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 R3 is 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.