| Titre : |
Chemistry of syntans and their influence on leather quality |
| Type de document : |
texte imprimé |
| Auteurs : |
Jochen Ammenn, Auteur ; C. Huebsch, Auteur ; E. Schilling, Auteur ; B. Dannheim, Auteur |
| Année de publication : |
2015 |
| Article en page(s) : |
p. 349-354 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Syntans
Tannage
|
| Tags : |
'Tanins synthétiques' Formaldehyde 'Dihydroxy diphényl sulfone' |
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
The first syntan, Neradol D, was a condensate of phenolsulfonic acid and formaldehyde. While this chemistry allowed more efficient use of vegetable tannins, it was not advantageous to be applied on leather alone and has to be considered an auxiliary. Incorporating urea into the phenolsulfonic acid - formaldehyde condensation established a second generation of syntans with significantly improved lightfastness. Replacement syntans were developed to substitute vegetable tannins, giving rise to leathers of good softness and fullness. The formaldehyde condensation of dihydroxy diphenyl sulfone (sulfone) can be considered a further development of the replacement syntans with lower residual monomers. In order to compare these four generations of syntans, poly-condensates of a comparable molecular size had to be synthesized. These tested in hydrothermic denaturation of skin powder and applied in sole tanning and re tanning. The resulting leathers were compared in various aspects of performance including shrinkage temperature, softness, fullness, light fastness, and rest monomers. |
| Note de contenu : |
- First and second generation syntans
- Second generation syntans and replacement syntans
- Replacement syntans and sulfone based syntans
|
| En ligne : |
https://drive.google.com/file/d/10X0FNheVCGQV9ejOTM0y9JZJc7GEv9qO/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24863 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CX, N° 11 (11/2015) . - p. 349-354
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