Novel hydrolysable azo disperse dyes based on N‐ester‐1,8‐naphthalimide: dyeing of polyester–cotton blends |
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| Authors: | Javad Mokhtari Kamaladin Gharanjig Mokhtar Arami Niyaz Mohammad Mahmoodi |
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| Affiliation: | 1. Department of Textile Engineering, University of Guilan, PO Box 3756, Rasht, Iran;2. Department of Organic Colorants, Institute for Colorants, Paint and Coatings, PO Box 1665618481, Tehran, Iran;3. Textile Engineering Department, Amirkabir University of Technology, PO Box 15875‐4413, Tehran, IranEmail: arami@aut.ac.ir |
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| Abstract: | The dyeing of polyester–cotton blends with new alkali‐hydrolysable azo disperse dyes based on N‐ester‐1,8‐naphthalimide was investigated. Polyester–cotton blend fabrics were dyed using both one‐ and two‐bath methods. Dyes 3 and 4 offered lower colour yield on polyester using the one‐bath method. For the rest of the dyes, employing either the one‐ or two‐bath method resulted in a similar colour yield on polyester fabric. The results for fastness properties and colour yield of the dyeings showed that the dyes were suitable for dyeing polyester–cotton blends using the one‐bath method. The kinetic study of hydrolysis of the dyes in alkali media obeyed the pseudo first‐order reaction rate. |
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