Method for preparing a (co)polyester

US12398265B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Jerome Lohmann · Landau, DE
• Maximilian Lehenmeier · Ludwigshafen, DE
• Norbert Effen · Lambsheim, DE
• Martin Bussmann · Markt Indersdorf, DE
• Michael Bernhard Schick · Ludwigshafen, DE
• Timo Benjamin WITT · Ludwigshafen am Rhein, DE

Key dates

• Filing date: Dec 5, 2019
• Grant date: Aug 26, 2025
• Expiry date: Feb 17, 2042

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G63/90
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for producing a (co)polyester, wherein the (co)polyester at least partially consists of 1,4-butylene dicarboxylate units, in a degassing plant, wherein the crude (co)polyester is degassed in the presence of 0.1% to 5% by weight, based on the total weight of the input materials, of an entraining agent at a pressure between 5 to 300 mbar.