Davy Mckee Corporation

Davy Mckee Aktiengesellschaft, Borsigalle

Georg Skupin

Konrad Wolff

Hans-Jochen Rothe

Hansdieter Hofmann

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. The polyamides can be produced from dinitriles, diamines and excess water in the presence of catalysts selected from the group consisting of: alkyl, aryl and alkyl/aryl esters of phosphoric, phosphorous, phosphonic and phosphinic acids. The catalyst is present in the amount of 0.001 to 1.0% based upon the total weight of the reactants.

Method for producing spinnable polyamide from dinitrile with phosphorus

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.

Growing community of inventors

Bruchkobel, Germany

Georg Skupin