Catalytic process for the preparation of an aromatic polyamide

Details Catalytic process for the preparation of an aromatic polyamide Catalytic process for the preparation of an aromatic polyamide

1992-05-27

1993-09-14

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

528125, 528128, 528171, 528192, 528173, 528337, 528348, C08G 6928

Patent

active

052450066

ABSTRACT:
The invention provides aromatic polyamides having an improved resistance to thermo-oxidation. This is achieved by carrying out the polycondensation in the presence of a catalyst system which comprises a mixture of a phosphorus compound and a tin(II) compound or is a compound which contains both elements. The process according to the invention allows aromatic polyamides to be obtained which are resistant to thermo-oxidation (discoloration).

REFERENCES:
patent: 5162483 (1992-11-01), Poll et al.

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