[article]
| Titre : |
Chrome free tanning compositions and processes |
| Type de document : |
texte imprimé |
| Auteurs : |
William C. Prentiss, Auteur ; Marcel Siegler, Auteur ; Eleanor M. Brown, Auteur |
| Année de publication : |
2003 |
| Article en page(s) : |
p. 63-69 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
Totally organic tannages that start with an aromatic composition that lends itself to secondary reactions or crosslinking are one approach to the reduction or elimination of chrome as the primary tanning agent for leather. Our approach was to focus on the preparation of low molecular weight methacrylic acid copolymers with methacrylate comonomers in order to maintain a rigid-rod structure with functional groups extending from the rod. In one series we developed polymerization procedures with an aminomethacrylate monomer, to impart cationic functionality to the tanning molecule, and hydroxyethylmethacrylate to provide hydroxyl functionality for the second stage reaction. In another series, methacrolein was the only comonomer thus providing aldehyde functionality for the second stage reaction. For evaluation shrinkage temperatures were measured before and after the addition of crosslinking agents to the experimentally tanned stock. The best result for the hydroxyl functionality was 86°C obtained with glutaraldehyde, while for the aldehyde functionality the best result was 84°C obtained with oxazolidine. While lower than shrinkage temperatures obtained with chrome tanning, these values are high enough for automotive upholstery leather. Samples of these systems were retanned with a typical upholstery formulation and evaluated. These leathers met the physical requirements for automotive leathers, but we feel the retanning formulations and polymer compositions would need adjustments to improve color matching and to be certain the fatliquors are suitable for fogging tests. |
| En ligne : |
https://drive.google.com/file/d/1PZLzZqy_mgDIcA6VIIdb2t9h63qe6U9E/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4095 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCVIII, N° 2 (02/2003) . - p. 63-69
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Chrome free tanning compositions and processes in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVIII, N° 2 (02/2003)
