High molecular weight (co)polyamide from diamino-alcohol

US5068311A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Klaus Horn · Dortmund, DE
• Hans-Detlef Heinz · Krefeld, DE
• Peter Muller · Leverkusen, DE
• Ralf Dujardin · Willich, DE

Key dates

• Filing date: Jun 15, 1990
• Grant date: Nov 26, 1991
• Expiry date: Jun 15, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G69/36
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to high molecular weight thermoplastically deformable branched aliphatic polyamides prepared by polycondensation of lactams and/or polyamide-forming diamine/dicarboxylic acid reaction mixtures and/or amino acids in the presence of small amounts of specific diamino-alcohols and approximately equivalent amounts of polycarboxylic acids (preferably dicarboxylic acids), and to a process for their preparation, which is distinguished by considerably shortened polycondensation times, without crosslinked products being formed. If appropriate, the process additionally utilizes a solid phase after-condensation, in which rapid further condensation to products which are indeed branched but are soluble in m-cresol and have an increased melt viscosity takes place.