Preparation of an aromatic polyamide with catalyst comprising ph

Details Preparation of an aromatic polyamide with catalyst comprising ph Preparation of an aromatic polyamide with catalyst comprising ph

1990-10-24

1992-11-10

Anderson, Harold D.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

524606, 528125, 528126, 528171, 528173, 528179, 528180, 528183, 528185, 528222, 528223, 528225, 528229, 528336, 528337, 528348, C08G 6928

Patent

active

051624834

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: 4727130 (1988-02-01), Bartmann
patent: 4749768 (1988-06-01), Finke et al.

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