الفهرس 
1. INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Azo compounds have for great many years occupied dominant
position in the field of colouring matters due to their versitility. Azo dyes
containing at least one (N=N) sturcture in a molecule, are the most
important group of disperse dyes , and globaly comprise over 50 percent of
disperse dyes because of its strong tinctorial strength compared to
anthraquinone dyes, ease to make and a low cost of manufacture. Azo dyes
have a vivid colour in the yellow to blue green region because of varying
azo components with electronwithdrawing groups and coupling
components with electronwithdrawing groups. Among these, azo dyes
using heterocyclic amines have become important as they give brighter and
stronger results than these based on aniline -based diazo compounds .
Disperse dyes are organic colours with less water solubility, so they are
applied in colloidal aqueous dispersions to hydrophobic textile fibres in
which the dyes dissolve and produce the desired coloration. The
development of disperse dyes is due to significant increase in the world
production of polyester fibres as compared to other fibres.
Over 95 percent of disperse dyes usage is for the coloration of
polyester and its blends.
In continuation of our interest in the synthesis of arylazo phenolic
derivatives , this work reports the synthesis of some arylazo naphthol and
coupling products of active methylene compounds using a conventional
method, and their application as disperse dyes on polyester fibres.
Recently, some details dealing with the synthesis and dyeing
behaviour of 4-arylazophenol dyes with mercapto triazole, thiadiazole,
indole, benzimidazole and 1,3,4 oxadiazole moities on different fibres
have been reported.