Functional polyalkyl (meth)acrylates with enhanced demulsibility performance

US10428292B2 · kind B2 · utility

Assignee

• Evonik Oil Additives GmbH · DE

Inventors

• Stefan Karl Maier · Ober-Ramstadt, DE
• Jurgen Gebhardt · Osnabrück, DE
• Katrin Schöller · Bad Soden, DE
• Frank-Olaf Mähling · Mannheim, DE

Key dates

• Filing date: Aug 9, 2017
• Grant date: Oct 1, 2019
• Expiry date: Aug 9, 2037

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10N2070/02
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Polyalkyl(meth)acrylate (PAMA) polymers comprising a certain amount of hydroxyl-functionalized alkyl (meth)acrylates can be used for improving the demulsibility performance of high VI lubricating oil compositions. The lubricating oil compositions can be those which are based on apolar base oils, especially hydraulic fluid compositions. The polymers can be comprised in certain lubricating oil compositions.