Method of producing shaped article of aromatic heterocyclic copo

Details Method of producing shaped article of aromatic heterocyclic copo Method of producing shaped article of aromatic heterocyclic copo

1994-03-15

1995-09-12

Nutter, Nathan M.

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

Synthetic resins

From carboxylic acid or derivative thereof

528290, C08G 6944

Patent

active

054497396

ABSTRACT:
A shaped article of an aromatic heterocyclic copolymer can be produced by (a) reacting (i) an aromatic diaminodithiol compound, hydrogen atoms of thiol groups of the aromatic diaminodithiol compound being substituted with substituted or unsubstituted alkyl groups, and (ii) an aromatic diamino compound separately with (iii) a dicarboxylic acid derivative in an organic solvent to produce two types of oligomers; (b) reacting the two oligomers in an organic solvent to produce a precopolymer; (c) heating the precopolymer to cause a thiazole ring closure reaction, thereby producing the aromatic heterocyclic copolymer; (d) finely comminuting the aromatic heterocyclic copolymer to obtain fine powder; and (e) molding the powder at an elevated temperature to form an article of a desired shape.

REFERENCES:
patent: 3448080 (1969-06-01), Hirsch
patent: 5219981 (1993-06-01), Gregory et al.

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