Method of stabilizing a melt of aliphatic and aromatic-aliphatic polyesters

US5760119A · kind A · utility

Assignee

• Max-Planck-Gesellschaft zur Föderung der Wissenschaften e.V. · US

Inventors

• Gerald Rafler · Potsdam, DE
• Olaf Wachsen · Garching bei München, DE
• Karl-Heinz Reichert · Berlin, DE

Key dates

• Filing date: Oct 2, 1996
• Grant date: Jun 2, 1998
• Expiry date: Oct 2, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/0083
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A method of stabilization of a melt viscosity of aliphatic- and/or aromatic homo- and/or co-polyesters containing catalysts and/or initiators, involves adding a masking agent which is tropon, .alpha.-tropolon, thujaplicin, pupurogallin or mixtures thereof to a melt resulting during synthesis of polyesters or during regeneration of polyesters.