Preparation of carboxyl-containing copolymers of ethylene

US5473025A · kind A · utility

Assignee

• BASF SE

Inventors

• Andreas Deckers · Flomborn, DE
• Ruger Schlund · Ludwigshafen, DE
• Roger Klimesch · Ransbach-Baumbach, DE

Key dates

• Filing date: Sep 29, 1994
• Grant date: Dec 5, 1995
• Expiry date: Sep 29, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F2810/50
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Carboxyl-containing copolymers of ethylene are prepared by polymer-analogous pyrolytic ester cleavage of copolymers consisting of a) from 60 to 99.9 mol% of ethylene, b) from 0.1 to 40 mol% of C.sub.4 -C.sub.8 -tert-alkyl esters of copolymerizable C.sub.3 -C.sub.12 -carboxylic acids and c) from 0 to 20 mol% of further copolymerizable monomers by a method in which pyrolytic ester cleavage is carried out at from 150.degree. to 250.degree. C. in the presence of organic sulfonic acids, in the absence of a solvent and in the virtual absence of free radical initiators.