Preparation of polyalkenylsuccinic acid derivatives and their use as fuel and lubricant additives

US5883196A · kind A · utility

Assignee

• BASF SE

Inventors

• Hans Peter Rath · Havelsee, DE
• Helmut Mach · Heidelberg, DE

Key dates

• Filing date: May 22, 1996
• Grant date: Mar 16, 1999
• Expiry date: May 22, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10L1/2366
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Polyalkenylsuccinic acid derivatives are prepared by reacting oligo- or polyolefins having a number average molecular weight (M.sub.N) of from 500 to 10,000 with maleic acid derivatives I ##STR1## where R and R', independently of one another, are each hydroxyl, lower alkyl or halogen or together are oxygen, at elevated temperatures by a process in which effective amounts of free radical acceptors, such as oxygen, are present in the gas phase and in the liquid phase of the reacting system during the reaction. These polyalkenylsuccinic acid derivatives are suitable, after additional imidation, amidation or esterification, as fuel and lubricant additives.