Lubricating grease composition, process for its preparation and its use

US5916853A · kind A · utility

Assignees

• Kluber Lubrication Munchen SE & Co. KG · DE
• INA Wälzlager Schaeffler oHG · DE

Inventors

• Dezso Hamori · Hersbruck, DE
• Dirk Loderer · Gilching, DE
• Dieter Sohn · Germering, DE
• Norbert Geheeb · Bamberg, DE

Key dates

• Filing date: Jul 15, 1998
• Grant date: Jun 29, 1999
• Expiry date: Jul 15, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10M2223/047
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A lubricant grease composition comprising is disclosed. The composition includes: PA1 (a) an oil or oil mixture of one or more ester of aromatic tricarboxylic or tetracarboxylic acids with an alcohol or a mixture of alcohols having the general composition C.sub.n H.sub.2n+1 OH with n=7 to 22 and/or one or more of the esters of trimethylolpropane, pentaerythritol or dipentaerythritol with aliphatic carboxylic acids having the general composition C.sub.n H.sub.2n+1 COOH with n=6 to 21, PA1 (b) a thickening agent comprising a biurea and/or polyurea, and PA1 (c) a wear-protecting additive comprising a mixture of the components triaryl phosphorothionate, C.sub.8 -C.sub.20 alkylamino monohexyl and dihexyl phosphate and C.sub.1 -C.sub.8 -alkylamino isobutyl phospate.