425-430A series of monoazo disperse dyes based on naphthalimide has been
applied on to the nylon fabrics. The build-up
values and dyeing properties of these dyes, such as leveling, and wash, light
and rub fastnesses on nylon fabrics
have been assessed. The dyes N-2-aminomethylpyridine-1,8-naphthalimide- azo-4″-N,N-diethyl
meta toluidine (A) and
N-2-aminomethylpyridine-1,8-naphthalimide-azo-2″- acetylamino-4″- N,N- diethyl
aniline (B) show higher build-up values on polyamide fabrics as compared
to the dyes N-2-aminomethylpyridine-1,8-naphthalimide- azo- 4″- N-hydroxy
ethyl-N- ethyl aniline (C) and
N-2-aminomethylpyridine-1,8-naphthalimide- azo- 4″- N-hydroxy ethyl-N- ethyl
aniline quaternized with 1- bromobutane (D). All of the applied dyes
exhibit excellent rub fastness, good wash fastness and moderate light fastness
on nylon fabrics. In addition, the molar extinction coefficient, wavelengths of
the maximum absorption and solvatochromism effects have also been studied using
chloroform, toluene, and DMF as solvents. Positive solvatochromism occurs when
toluene is replaced by DMF as solvent. The antimicrobial properties of dyed
fabrics are evaluated against various bacteria; the dyed fabrics exhibit
antimicrobial efficacy against both Gram-positive and Gram-negative bacteria