Preparation of spinnable polyamide from dinitrile, diamine, H.sub.2 O with P containing catalyst

US4436898A · kind A · utility

Assignee

• Davy McKee Aktiengesellschaft, Borsigalle · DE

Inventors

• Hansdieter Hofmann · Karben, DE
• Hans-Jochen Rothe · Maintal, DE
• Georg Skupin · Bruchköbel, DE
• Konrad Wolff · Frankfurt am Main, DE

Key dates

• Filing date: May 10, 1982
• Grant date: Mar 13, 1984
• Expiry date: May 10, 2002

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G69/16
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Production of spinnable polyhexamethylene adipamide of high molecular weight from adiponitrile, hexamethylene diamine, water and additives, preferably continuously in a reaction cascade and in a finisher as the final stage, catalytically accelerated by catalysts as disclosed. It has now been discovered that polyamides can be produced from dinitriles, diamines and excess water in the presence of catalysts selected from the group consisting of: (1) oxygen-containing phosphorous compounds; (2) oxygen-containing boron compounds; (3) acidic oxygen-containing sulfur compounds; and (4) hydrogen halide and ammonium or ammonium alkyl salt thereof.