Use of ester group-including polymers as antifatigue additives

US8859472B2 · kind B2 · utility

Assignee

• Evonik RohMax Additives GmbH · DE

Inventors

• Torsten Stoehr · Frankfurt, DE
• Michael Mueller · Bensheim, DE
• Thorsten Bartels · Bad Dürkheim, DE
• Christoph Wincierz · Darmstadt, DE
• Klaus Schimossek · Bensheim, DE
• Michael Neusius · Darmstadt, DE
• Dieter Janssen · Lippstadt, DE
• Miriam Kathrin Stihulka · Maintal, DE

Key dates

• Filing date: Jun 20, 2008
• Grant date: Oct 14, 2014
• Expiry date: May 11, 2030

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10N2030/06
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to the use of ester group-including polymers having at least one nonpolar segment P and at least one polar segment D, where the polar segment D includes at least 8 repeating units, and the proportion of dispersing repeating units in the polar segment D is at least 30% by weight based on the weight of the polar segment D, as antifatigue additive in lubricants.