scholarly journals Synthesis of monoazo disperse dyes based on 2-aminoheterocycles and their dyeing performance on nylon fabrics

2000 ◽  
Vol 65 (11) ◽  
pp. 773-780 ◽  
Author(s):  
Hari Maradiya ◽  
Vithal Patel
Keyword(s):  
Absorption Spectra ◽  
Elemental Analysis ◽  
Disperse Dyes ◽  
Visible Absorption ◽  
Dyeing Performance ◽  
Nylon Fabric ◽  
Wide Range ◽  
Rf Values ◽  
Monoazo Disperse Dyes ◽  
Dyed Fabric

Novel monoazo disperse dyes based on various 2-aminoheterocycles were prepared using N-methyl-N-(2-hydroxyethyl)aniline as the coupling component. All the dyes were applied as disperse dyes on nylon fabric. These dyes have been found to give a wide range of colour shades with very good depth, brightness and levelness on nylon fabric. The visible absorption spectra, elemental analysis and Rf values were investigated. The percentage dye bath exhaustion on fabric was found to be very good. The dyed fabric showed very good to excellent fastness to light, washing, rubbing and perspiration. The sublimation fastness was found to be excellent.

scholarly journals Monoazo disperse dyes based on 2-amino-1,3,4-thiadiazole derivatives

2002 ◽  
Vol 67 (11) ◽  
pp. 709-718 ◽  
Author(s):  
Harir Maradiya
Keyword(s):  
Spectral Properties ◽  
Visible Range ◽  
Disperse Dyes ◽  
Fastness Properties ◽  
Light Fastness ◽  
Dyeing Performance ◽  
Brown Colour ◽  
Nylon Fabric ◽  
Monoazo Disperse Dyes ◽  
Dyed Fabric

A series of monoazo disperse dyes based on 2-amino-5-mercapto-1,3,4-thiadiazole was prepared by coupling with various N-arylmaleimides. The dyeing performance of these dyes was assessed on nylon fabric. The dyes were found to give yellow to brown colour shades on dyeing with good depth and levelness on nylon fabric. The dyebath exhaustion fixation and fastness properties of the dyes were also determined. The dyed fabric showed moderate to good light fastness and very good to excellent fastness to washing, rubbing, perspiration and sublimation. The IR and visible range spectral properties of the dyes were also determined.

scholarly journals Synthesis and dyeing performance of some amphiphilic naphthalimide azo disperse dyes on polyester fabrics

2020 ◽  
Vol 85 (10) ◽  
pp. 1253-1264
Author(s):  
Umar Ameuru ◽  
Mohammed Yakubu ◽  
Kasali Bello ◽  
Peter Nkeonye ◽  
Azim Halimehjani
Keyword(s):  
Absorption Spectra ◽  
Electronic Absorption Spectra ◽  
Polyester Fabric ◽  
Disperse Dyes ◽  
Light Fastness ◽  
Visible Absorption ◽  
Polyester Fabrics ◽  
Dyeing Performance ◽  
Azo Disperse Dyes ◽  
Monoazo Disperse Dyes

A series of monoazo disperse dyes were synthesized by coupling diazotized 4-amino-N-dodecyl-1,8-naphthalimide with N,N-dialkyl anilines and naphthol derivatives. The synthesized intermediates and the dyes were characterized using FTIR, 1H-NMR, 13C-NMR, mass spectroscopy and elemental analysis (CHN). Visible absorption spectra of the dyes were examined in solvents of different polarities. The electronic absorption spectra cover a wavelength (?max) range of 515-535 nm in DMF at uniformly absorption intensity between 1.59-3.00?104 L mol-1 cm-1. The dyes gave deep and bright intense hues of light violet, maroon, pink and neon red on polyester fabrics. The dyes generally showed good washing and perspiration rating but poor to moderate light fastness properties on woven polyester fabric and could be recommended for commercial outlets.

scholarly journals Synthesis and application of 2-aminothiadiazole disperse dyes for nylon fabrics

2001 ◽  
Vol 66 (2) ◽  
pp. 87-93
Author(s):  
Maradiya Raghav ◽  
Vithal Patel
Keyword(s):  
Elemental Analysis ◽  
Spectral Studies ◽  
Disperse Dyes ◽  
Fastness Properties ◽  
Light Fastness ◽  
Nylon Fabric ◽  
Wide Range

Some disperse dyes based on 2-amino-5-mercapto-1,3,4-thiadiazole have been prepared by coupling with various N-arylacrylamides. The dyes were characterized by IR spectral studies and elemental analysis. All the dyes were applied as disperse dyes on nylon fabric. These dyes have been found to give a wide range of color shades with very good depth and levelness on fabrics. The percentage dye bath exhaustion and fixation on the fabric have been found to be very good. The dyied fabrics showed moderate to good light fastness and very good to excellent washing, rubbing, persperation and sublimation fastness properties.

scholarly journals Synthetic utility of 5-amino-6-cyano-2-phenylthieno[2,3-d] oxazole

2005 ◽  
Vol 70 (11) ◽  
pp. 1249-1253 ◽  
Author(s):  
V.R. Kanetkar ◽  
R.R. Walavalkar
Keyword(s):  
Ir Spectroscopy ◽  
Absorption Spectra ◽  
Polyester Fabric ◽  
Disperse Dyes ◽  
Fastness Properties ◽  
Visible Absorption ◽  
Synthetic Utility ◽  
Azo Disperse Dyes

This paper describes the synthesis of 5-amino-6-cyano-2-phenylthieno[ 2,3-d]oxazole and its utilization for the preparation of a range of azo disperse dyes. These aryl azo disperse dyes were applied on polyester fabric and their fastness properties were evaluated. The dyes were characterized by NMR and IR spectroscopy. The visible absorption spectra of these dyes were Recorded.

Photostability of Monoazo Disperse Dyes in Different Solvents

2013 ◽  
Vol 834-836 ◽  
pp. 472-475
Author(s):  
Narumol Ittarat ◽  
Potjanart Suwanruji ◽  
Thitinun Karpkird ◽  
Jantip Setthayanond
Keyword(s):  
Melting Point ◽  
Visible Light ◽  
Elemental Analysis ◽  
Disperse Dyes ◽  
Initial Value ◽  
Methyl Group ◽  
H Nmr ◽  
Monoazo Disperse Dyes

Twelve monoazo disperse dyes were synthesized and then characterized by melting point (m.p.) measurement, elemental analysis and1H-NMR. The photostability of monoazo disperse dyes in solvents with different polarities was evaluated thereafter the dyes in each solvent were irradiated with visible light for 8 hours. The percentage of photostability of the dye decreased from the initial value in the range of 5-10%. The photostability was affected by the substituted group of the dyes regardless of the solvent used. Different R1group on the diazo component increased the photostability in order of H˃CN˃Cl. The photostability of the dye was also higher when R2group on the coupling component was a methyl group.

scholarly journals Dyeing of hydrophobic fabrics with disperse dyes

2001 ◽  
Vol 66 (6) ◽  
pp. 367-376 ◽  
Author(s):  
Hari Maradiya ◽  
Vithal Patel
Keyword(s):  
Absorption Spectroscopy ◽  
Elemental Analysis ◽  
Cellulose Triacetate ◽  
Spectral Studies ◽  
Disperse Dyes ◽  
Fastness Properties ◽  
Visible Absorption ◽  
Dyed Fabrics ◽  
Yellowish Orange ◽  
Visible Absorption Spectroscopy

A series of disperse dyes has been synthesized by diazotisation of 2,6-dibromo-4-nitroaniline and coupled with various N-arylmaleimides. The dyes were characterized by IR spectral studies, visible absorption spectroscopy and elemental analysis. All the dyes were applied as disperse dyes on nylon, cellulose triacetate and polyester fabrics. These dyeswere found to give yellowish orange to deep brown shades with very good depth, levelness and brightness on different fabrics. The percentage dye bath exhaustion and fixation on fabrics were found to be very good. The light, washing, rubbing, perspiration and sublimation fastness properties of the dyed fabrics were found to be good to excellent.

scholarly journals Synthesis and Visible Spectral Behaviour of Some New Photosensitizers: Monomethine, Dimethine, Trimethine, Styryl and Mixed Cyanine Dyes

1999 ◽  
Vol 23 (12) ◽  
pp. 700-701
Author(s):  
Hassan A. Shindy
Keyword(s):  
Nmr Spectroscopy ◽  
Absorption Spectra ◽  
Elemental Analysis ◽  
Cyanine Dyes ◽  
Visible Absorption ◽  
H Nmr ◽  
Spectral Behaviour

The new photosensitizers, monomethine, dimethine, trimethine, styryl and mixed cyanine dyes incorporating pyrazolo/oxazole(thiazole) nuclei are prepared; the visible absorption spectra for all the synthesized cyanines were examined in 95% ethanol; structural confirmation is carried out by elemental analysis, IR and 1H NMR spectroscopy.

scholarly journals Assessment of Dyeing Properties of Novel Bisazo-Bisazomethine Disperse Dyes on Polyester Fabric

2011 ◽  
Vol 8 (3) ◽  
pp. 1218-1225 ◽  
Author(s):  
B. C. Dixit ◽  
D. M. Patel
Keyword(s):  
Aromatic Amines ◽  
Polyester Fabric ◽  
Spectral Studies ◽  
Disperse Dyes ◽  
Fastness Properties ◽  
Visible Absorption ◽  
Polyester Fabrics ◽  
H Nmr ◽  
Dyeing Performance ◽  
Uv Visible

Novel bisazo-bisazomethine disperse dyes were prepared by the coupling of diazotized solutions of various aromatic amines with 2,2'-{sulfonylbis [4,1-phenylene nitrilomethylylidene]} diphenol (SB). Above Schiff base was prepared by the condensation of 2-hydroxybenzaldehyde with 4,4’-sulphonyl- dianiline (Dapson). The resultant dyes were characterized by elemental analysis, IR and1H NMR spectral studies. The UV Visible absorption spectral data were investigated in dimethylformamide (DMF) and are discussed in terms of structural property relationship. Their dyeing performance as disperse dyes has been assessed on polyester fabrics. The results show that a better hue was obtained on polyester fabrics and have mild to moderate fastness properties.

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