High viscosity base fluids based on oil compatible polyesters prepared from long-chain epoxides

US12098344B2 · kind B2 · utility

Assignee

• Evonik Operations GmbH · DE

Inventors

• Stefan Karl Maier · Ober-Ramstadt, DE
• Peter Altenbuchner · Kohlenbissen, DE
• Fabian Ziegler · Darmstadt, DE
• Christiane Zatocil · Herten, DE
• Stefan Hilf · Rodenbach, DE
• Emily Clare Schweißinger · Dortmund, DE
• Jens Elsner · Hochheim, DE

Key dates

• Filing date: Jul 1, 2021
• Grant date: Sep 24, 2024
• Expiry date: Jul 1, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10N2070/00
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A polyester is useful as a high viscosity base fluid. A method for its preparation involves epoxidizing an alpha-olefin, reacting the alpha-epoxide or diol with a saturated linear aliphatic dicarboxylic acid, and isolating the polyester. Lubricant compositions can contain such polyesters and the compositions are useful as automatic transmission fluids, manual transmission fluids, continuously variable transmission fluids, gear oil formulations, industrial gear oil formulations, axle fluid formulations, dual clutch transmission fluids, dedicated hybrid transmission fluids, or as hydraulic oils.