Process for the production of copolyamide from aromatic dicarboxylic acids, adipic acid and hexamethylene diamine

US4673728A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Werner Nielinger · Krefeld, DE
• Hermann Brinkmeyer · Krefeld, DE
• Rudolf Binsack · Krefeld, DE
• Ludwig Bottenbruch · Krefeld, DE
• Heinz-Josef Fullmann · Leverkusen, DE

Key dates

• Filing date: Feb 18, 1986
• Grant date: Jun 16, 1987
• Expiry date: Feb 18, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G69/265
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for the production of copolyamides from aromatic dicarboxylic acids, adipic acid, and hexamethylene diamine having from 30 to 51.5% by weight of units of the hexamethylene adipic acid amide, the monomers being precondensed at at least 250.degree. C. and under a pressure of at least 35 bars and the polycondensation being conducted in a conventional manner to completion.