Preparation of spinnable polyamide from dinitrile, diamine, H.su

Details Preparation of spinnable polyamide from dinitrile, diamine, H.su Preparation of spinnable polyamide from dinitrile, diamine, H.su

1982-05-10

1984-03-13

Anderson, Harold D.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

524606, 524608, 524845, 526 65, 526 68, 526 71, 528335, 528337, 528346, 528347, C08G 6900

Patent

active

044368984

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.

REFERENCES:
patent: 2245129 (1941-06-01), Greenewalt
patent: 3847876 (1974-11-01), Onsager

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