Collagen crosslinking : new binding sites for mineral tannage / Neil A. Evans in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXII (Année 1987)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXII (Année 1987) . - p. 86-95 Titre : Collagen crosslinking : new binding sites for mineral tannage Type de document : texte imprimé Auteurs : Neil A. Evans, Auteur ; Brian Milligan, Auteur ; K. C. Montgomery, Auteur Année de publication : 1987 Article en page(s) : p. 86-95 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Treatment capable of covalently binding aromatic 1,2-dicarboxylic acids to collagen are described. Aluminium tannage of the modified collagen produces white leather with good thermal and dyebath stability, in contrast to that produced by similar tannage of unmodified collagen. However, the treatment also results in excessive swelling and reduced dye affinity. The aromatic 1,2-dicarboxylic acid groups also act as strong binding sites for chromium, but not for titanium or zirconium. The shrinkage temperature of the modified collagen, after chrome tannage, is exeptionally high, whereas the thermal stability after titanium or zirconium tannage is little different from that attained by similar tannage of untreated collagen. En ligne : https://drive.google.com/file/d/13Q8bXdCYpE9NzEThZ7FUXozmPVsluK7Y/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8984 [article]

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The use of dicarbamoylsulfonates as tanning agents / Brian Milligan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XXVII (Année 1982)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XXVII (Année 1982) . - p. 70-83 Titre : The use of dicarbamoylsulfonates as tanning agents Type de document : texte imprimé Auteurs : Brian Milligan, Auteur ; Peter R. Buechler, Auteur Année de publication : 1982 Article en page(s) : p. 70-83 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Four water-soluble crosslinking agents have been examined as tanning agents for sheepskin and cattlehide. Three were dicarbamoylsulfonates made by bisulfite addition to diisocyanates, the fourth was terephthaloyl thiosulfate. All four were tested as primary tannages, and the bisulfite adducts were also used to retan slack chrome- and zirconium-tanned leathers. Each of the bisulfite adducts tanned the hides and skins, as shown by an increase in shrinkage temperature and resistance to enzymic digestion, but subjective and mechanical testing revealed various deficiencies in the resultant leathers. Terephthaloyl thiosulfate had tanning action. Better results were obtained using the bisulfite adducts as retanning agents. In particular, retannage with the bisulfite adduct of tolylene diisocyanate greatly improved the fullness, resilience, flexibility, break, color, thermal stability, and enzymic resistance of chrome-tanned leather, with minimal effects on other desirable properties. En ligne : https://drive.google.com/file/d/1b9Nx3ZR9CrQuVFL0dyy6n8USCONhfE5w/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17416 [article]

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