Polyisobutene and polyisobutene derivatives for use in lubricant compositions

US7071275B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Hans Peter Rath · Havelsee, DE
• Arno Lange · Bad Dürkheim, DE
• Helmut Mach · Heidelberg, DE

Key dates

• Filing date: Dec 18, 2002
• Grant date: Jul 4, 2006
• Expiry date: Dec 18, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10N2040/255
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention describes polyisobutenyl derivatives of succinic acid obtainable by: i) reacting a polyisobutene which has a reactive end group content of at least 80% and whose molecular weight distribution is characterized by a maximum MP in the distribution curve in the range from 500 to 20 000 daltons and a ratio of weight average molecular weight to number average molecular weight MW/MN of below 1.4 with maleic acid or maleic anhydride; ii) reacting the polyisobutene-succinic acid derivative obtained in i) with at least one compound I which has at least one primary or secondary amino group and/or an OH group to form an amide or ester bond, and also a process for preparing them and their use as additives in lubricant compositions.