Pressurization of ethylenically unsaturated monomers

US6350827B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Heinz Friedrich Sutoris · Bischofswerda, DE
• Andreas Deckers · Flomborn, DE
• Wilhelm Weber · Neustadt, DE

Key dates

• Filing date: Dec 2, 1999
• Grant date: Feb 26, 2002
• Expiry date: Dec 2, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F10/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Disclosed is a process for pressurizing ethylenically unsaturated monomers to 200-5000 bar in the absence of a polymerization initiator, which comprises effecting said pressurizing in the presence of nitroxyl compounds of the formula I whereR1 and R2 are singly C1-C4-alkyl or combine with the joining carbon atom to form a 5- or 6-membered saturated hydrocarbon ring,R3 is C1-C4-alkyl, andR4 is hydrogen or C1-C12-alkyl.Also disclosed are a process for preparing copolymers by such pressurization and subsequent polymerization and copolymers obtainable thereby.