Method for the preparation of polyether ester amides

US4429081A · kind A · utility

Assignee

• Chemische Werke Huels Aktiengesellschaft · US

Inventors

• Salih Mumcu · Marl, DE
• Hans J. Panoch

Key dates

• Filing date: Jun 28, 1982
• Grant date: Jan 31, 1984
• Expiry date: Jun 28, 2002

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S525/927
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Method for manufacturing polyether ester amides by polycondensing at ordinary or reduced pressure, optionally in the presence of catalysts. A hot melt of: PA1 (a) polyamides having carboxyl end groups with polyethers having hydroxyl end groups and amino end groups; PA1 (b) polyamides having carboxyl end groups and polyethers having hydroxyl end groups; PA1 (c) polyamides having carboxyl end groups with polyethers having amino end groups; or PA1 (d) polyamides having amino end groups with polyethers having carboxyl end groups; is treated at temperatures from about 200.degree. to 300.degree. C. and at a water vapor pressure of about 5 to 25 bars with mechanical agitation and after water is removed by decompression the polycondensation of the polyether ester amide is carried out.