Novel azo dyes derived from phthalimide. Part 2: Dyeing properties and colour fastness on polyester fibres^†

Abstract

The coloration and fastness properties of 18 carbocyclic monoazo disperse dyes bearing a phthalimide ring fused to the aromatic ring of their diazo components have been investigated. In each case, the phthalimidyl nitrogen atom was substituted with either a butyl, sec‐butyl or isopropyl group, while the adjoined phenyl ring bore a substitution pattern typical of commercial colorants. Dye uptake and build‐up onto both conventional and microfibre polyester through exhaustion dyeing were examined: while the expected tendency of greater exhaustion on microfibre was noted, there were few clear trends with respect to dye structure. The nature of the N‐alkyl group made no consistent difference to dye uptake. Attempts to explain the observed percentage exhaustion values by mapping them to calculated partition coefficient or solubility parameter values were unsuccessful. Wash fastness tended to be best for blue dicyano‐substituted derivatives, which may be as a result in part of these substituents promoting hydrolysis of the adjacent phthalimide ring to give more soluble phthalate species. In contrast, the dicyano dyes had relatively poor photostability compared with their unsubstituted analogues.

Ultrasonic Assisted Improvement in Dyeing Behaviour of Polyester Fabric Using Disperse Red 343

“…The rating results given in Table 1 for various shades show that US has enhanced the fastness character for moderate to excellent. This is because after irradiation of fabric the dye particles migrate from dye bath to fabric voids and makes strong bonding [31][32]. Also the fading of dyed fabrics depends upon structure of dye as well as surface modification of fabric which is also affected by light source as well as physical state of absorbed dye.…”

New disazo dyes derived from aminopyrazoles: synthesis, spectroscopic properties, computational study and structural properties

“…Constituting a group of widely used organic compounds, 1‐3 azo dyes are of great interest due to their various applications in the fields of chemical science and technology. The most commonly used colourants among textile dyes are the azo dyes because of their characteristic properties of dyeing strength, easy production, wide colour scales and good quality colour fastness 4‐13 . Azo dyes are also used as solar cells, 14 photo‐sensitisers, 15 sensors, 16 photochromic materials, 17 metallochromic indicators 18 and electro‐optic devices 19 .…”

3-Amino-5-Hidroksi-1H-Pirazol Bazlı Bazı Yeni Disazo Boyarmaddelerinin Sentezi ve Spektroskopik Özellikleri

“…Yapılarında azo parçasının (N = N) varlığı ile karakterize edilen azo boyarmaddeleri, dispers boyaların en temel grubu olup [1] büyük bir sentetik organik bileşik sınıfını temsil eder [2] ve teknolojinin çeşitli alanlarındaki farklı uygulamaları nedeniyle büyük ilgi görmektedir. Azo boyarmaddelerin en önemli faydaları boyama mukavemeti, kolay üretim, geniş renk skalaları ve kaliteli renk haslığı gibi özelliklerinden dolayı renklendirme özellikleri olarak kalsada [3][4][5][6][7][8][9][10][11][12], ayrıca güneş pilleri, fotoduyarlılaştırıcılar, sensörler, fotokromik malzemeler, metalokromik göstergeler ve elektro-optik cihazlar [13][14][15][16][17][18] olarak da pek çok alanda kullanılmaktadır. Azo boyarmaddeler son zamanlarda birçok teorik çalışmanın konusu haline gelmiş [19,20], biyoloji alanındaki araştırmacıların ilgisini çekmiş ve azo boyarmaddelerin antimikrobiyal özelliklere sahip olduğu [21,22] ve antifungal aktivite gösterdiği bildirilmiştir [23].…”