| Titre : |
Low-water-soluble reactive dyes for application in ultrafine polyamide/polyurethane synthetic leather |
| Type de document : |
texte imprimé |
| Auteurs : |
Dexiang Li, Auteur ; Wei Ma, Auteur ; Bingtao Tang, Auteur ; Shufen Zhang, Auteur |
| Année de publication : |
2024 |
| Article en page(s) : |
p. 252-261 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Colorants réactifs
Cuir synthétique
Cuirs et peaux -- Teinture
PolyamidesUn polyamide est un polymère contenant des fonctions amides -C(=O)-NH- résultant d'une réaction de polycondensation entre les fonctions acide carboxylique et amine.
Selon la composition de leur chaîne squelettique, les polyamides sont classés en aliphatiques, semi-aromatiques et aromatiques. Selon le type d'unités répétitives, les polyamides peuvent être des homopolymères ou des copolymères.
Polyuréthanes
Solidité de la couleur
|
| Index. décimale : |
667.2 Colorants et pigments |
| Résumé : |
Ultrafine polyamide/polyurethane synthetic leather (UP/PSL), with a highly natural leather-like appearance and touch, is widely used in many leather commodities. Generally, acid dyes, which are mostly used for dyeing UP/PSL, exhibit poor colour fastness. While, reactive dyes are well-known for their good colour fastness. However, reactive dyes are not used to dye UP/PSL because they are water-soluble and cannot stain the polyurethane (PU) in UP/PSL. In this study, five low water-soluble reactive dyes with good affinity for both polyamide (PA) and PU were synthesised and characterised using ultraviolet-visible and infrared spectroscopy, and mass spectrometry. All low-water-soluble reactive dyes were monoazo dyes with only one sulfonic group and two different functional groups. The reactive dyes were used to dye UP/PSL at 98°C and fixed at 90°C with 7-azatridecane-1,13-diamine as a crosslinking agent. For comparison, Eriofast Red-2B (ER-2B) was used to dye UP/PSL using a special dyeing procedure. ER-2B showed severe issues related to low utilisation and uneven dyeing, whereas the five low water-soluble reactive dyes exhibited better performance than ER-2B. Both the exhaustion and fixation of dyes 1 and 4 exceeded 90.0% when the dosage was less than 3.0% owf (on weight of fabric). In addition, they exhibited good levelling. The washing fastness of the five reactive dyes was excellent and higher than grade 4. The dry rubbing fastness was higher than grade 3-4. Therefore, UP/PSL can be satisfactorily dyed using the reactive dyes with a solubility of less than 1.0 g/L and meet the requirements of daily life applications. |
| Note de contenu : |
- MATERIALS AND METHODS : Chemicals and instruments - Preparation of reactive dyes with low solubilities - Dyeing process - Measurements of colour strength and fastness - Dyeing results of PU in UP/PSL with low water-soluble reactive dyes and ER-2B
- RESULTS AND DISCUSSION : Structures and UV-vis absorption spectra of the low water-soluble reactive dyes - Results of dyeing UP/PSL with low water-soluble reactive dyes - Colour fastness of UP/PSL dyed with five low water-soluble reactive dyes |
| DOI : |
https://doi.org/10.1111/cote.12692 |
| En ligne : |
https://drive.google.com/file/d/10-sAJ3RcR8wrRTGti-sf8xWLZ9y5Ww0i/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40941 |
in COLORATION TECHNOLOGY > Vol. 140, N° 2 (04/2024) . - p. 252-261
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