Process for the preparation of a thermoplastically processable a

Details Process for the preparation of a thermoplastically processable a Process for the preparation of a thermoplastically processable a

1990-12-06

1993-03-23

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

528125, 528126, 528128, 528171, 528172, 528173, 528179, 528183, 528185, 528190, 528337, 528344, 528348, C08G 6928

Patent

active

051965054

ABSTRACT:
A thermoplastically processable aromatic polyamide is prepared by polycondensing diacid monomer A with diamine monomer B: (A) HOOC--Ar--COOH;(B) H.sub.2 N--Ar'--NH.sub.2 ; wherein Ar is 1,3-- or 1,4-phenylene; 1,4--, 1,5--, 2,6-- or 2,7-naphthylene, ##STR1## and Ar' is ##STR2## wherein X is --SO.sub.2 -- or --CO--; Y is --O-- or --S--; Z is --O--, --S--, --SO.sub.2 --, --CO-- or ##STR3## wherein R and R' each is --H or C.sub.1 -- to C.sub.4 -alkyl and n is 0 or 1 in the melt at a temperature in the range of from 200.degree. to 400.degree. C. in the presence of a catalyst selected from the group consisting of alkyl- or aryl-phosphonic acids, -phosphonous acids, -phosphinic acids, esters thereof, halides thereof and mixtures thereof, the catalyst content being 0.01 to 2.0 mol % relative to the total content of components A and B.

REFERENCES:
patent: 4621134 (1986-11-01), Aritomi et al.
patent: 4720538 (1988-01-01), Bartmann
patent: 4727130 (1988-02-01), Bartmann
patent: 4749768 (1988-06-01), Finke et al.
Gefter, Organophosphorus Monomers And Polymers (1962), pp. X-XIII
Hackh's Chemical Dictionary, Fourth Edition, 1969 (1972), p. 514.

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