Method for the preparation and use of polyether ester amides with units of the starting components randomly distributed in the polymer chain

US4207410A · kind A · utility

Assignee

• Chemische Werke Huels Aktiengesellschaft · US

Inventors

• Klaus Burzin · Marl, DE
• Salih Mumcu · Marl, DE
• Rainer Feldmann · Marl, DE
• Hans Jadamus · Marl, DE
• Roland Feinauer

Key dates

• Filing date: Mar 21, 1978
• Grant date: Jun 10, 1980
• Expiry date: Mar 21, 1998

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G69/44
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Method for preparing and using thermoplastic polyether ester amides with units of the starting components randomly distributed in the polymer chain. A mixture of: PA1 I. one or more polyamide forming compounds from the group of the omega-aminocarboxylic acids and/or lactams having at least 10 carbon atoms; PA1 II. an alpha, omega-dihydroxy-(polytetrahydrofuran) having an average degree of polymerization of between about 2 and 42 or a molecular weight of between 160 and 3,000; and PA1 III. at least one organic dicarboxylic acid is heated in a weight ratio of I to (II+III) of between 30:7 and 98:2. In (II+III) the hydroxy and carboxy groups are present in equivalent amounts. The heating takes place in the presence of 2-30% by weight of water, based on the polyamide-forming compounds of component I, under the internal pressure attained in a closed container at temperatures of between 230.degree. and 300.degree. C. Water is removed as steam and after removal of the water, the product is further treated at 250.degree.-280.degree. C. with the exclusion of oxygen under normal pressure or under reduced pressure.