[article]
| Titre : |
Di(methylsulphonyl)quinacridone : synthesis, characterisation and application in nylon |
| Type de document : |
texte imprimé |
| Auteurs : |
Pamela M. Visintin, Auteur ; Robert W. Mims, Auteur |
| Année de publication : |
2010 |
| Article en page(s) : |
p. 11-17 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Index. décimale : |
667.3 Teinture et impression des tissus |
| Résumé : |
The first quinacridone derivative with methylsulphonyl substituents, 2,9-di(methylsulphonyl)quinacridone, has been synthesised using two new sulphur-containing intermediates, 2,5-di(4-methylthioanilino)-terephthalic acid and 2,5-di-(4-methylsulphonylanilino)terephthalic acid. The key step in synthesising 2,9-di(methylsulphonyl)quinacridone involves the controlled and complete oxidation of the sulphide groups to their respective sulphonyl groups. The oxidation process is unique in that the presence of a catalyst is not required. The two different polymorphs of 2,9-di(methylsulphonyl)quinacridone range in colour from red to orange and exhibit extremely low solubility in organic solvents, water and acidic or basic media. When incorporated into nylon 6 by the extrusion/injection moulding method, both crystal forms of this pigment display excellent thermal and chemical stability up to a moulding temperature of 302°C. The nylon–quinacridone compositions exhibit a high degree of light fastness, with a CIELAB Delta E*ab (colour difference) value > 1.0 after a 200-h exposure time at 6500 W. |
| DOI : |
10.1111/j.1478-4408.2010.00221.x |
| En ligne : |
http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2010.00221.x/pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8412 |
in COLORATION TECHNOLOGY > Vol. 126, N° 1 (2010) . - p. 11-17
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Di(methylsulphonyl)quinacridone : synthesis, characterisation and application in nylon in COLORATION TECHNOLOGY, Vol. 126, N° 1 (2010)
