Polyisobutenes

US4152499A · kind A · utility

Assignee

• BASF SE

Inventors

• Paul Boerzel · Bischofswerda, DE
• Klaus Bronstert · Eisenberg (Pfalz), DE
• Friedrich Hovemann · Hockenheim, DE

Key dates

• Filing date: Dec 23, 1977
• Grant date: May 1, 1979
• Expiry date: Dec 23, 1997

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F2810/30
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Isobutene polymers having a mean degree of polymerization P of from 10 to 100 and a proportion E of double bonds, capable of reaction with maleic anhydride, of from 60 to 90%, where E=100% corresponds to the calculated theoretical value for the case where each molecule of the isobutene polymer contains such a reactive double bond.