Method of selectively hydrogenating ethylenically unsaturated double bonds in polymers

US6696518B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Rolf Dersch · Bischofswerda, DE
• Heiko Maas · Mannheim, DE
• Volker Schädler · Mannheim, DE

Key dates

• Filing date: Nov 27, 2001
• Grant date: Feb 24, 2004
• Expiry date: Nov 27, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D1/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for hydrogenating ethylenically unsaturated double bonds in polymers P by reacting an aqueous dispersion of at least one polymer P with hydrogen in the presence of at least one hydrogenation catalyst comprising at least one transition metal selected from rhodium and/or ruthenium and at least one nonionic phosphorus compound capable of forming a coordinative compound with the transition metal, which comprises incorporating the hydrogenation catalyst into the aqueous dispersion of the polymer P without adding a solvent. The present invention also relates to the aqueous dispersions of the hydrogenated polymers P obtainable by this process and to coating compositions comprising such dispersions.