C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/223
C08G 69/00 (2006.01) C08G 69/04 (2006.01) C08G 69/28 (2006.01)
Patent
CA 1186444
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.
402811
Hofmann Hansdieter
Rothe Hans-Jochen
Skupin Georg
Wolff Konrad
Davy Mckee Aktiengesellschaft
Hewson Donald E.
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