[article]
| Titre : |
Influence of fatliquoring agents on the development of pH-values in the chrome tannage |
| Type de document : |
texte imprimé |
| Auteurs : |
Heinrich Francke, Auteur |
| Année de publication : |
2000 |
| Article en page(s) : |
p. 11-18 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
The application of electrolyte stable fatliquoring agents in the chrome tannage has been the state of the art for many years. Due to the polar structure of the fatliquor molecules, chemical and physical interactions with the tanning float are conceivable. Seven different electrolyte-stable fatliquor preparations were tested for their influence on the basification of chrome liquors with magnesium oxide during tannage. It was found that preparations of neutral oil and alkylsulfonates do not have any influence on the pH profile and that cationic emulsified oils exert only a slight influence. However, all fatliquor preparations that contain sulfosuccinates gave lower pHs at moderate temperatures. We determined that this was caused by the formation of slightly soluble magnesium sulfosuccinate compounds. This process is reversible by an increase in temperature, i. e. at temperatures of > 40 °C the final pH is achieved which is the same as a basification without addition of fat-liquoring agents. Also, sulfited products influence the basification in a similar way as the sulfosuccinate products. However, the described effect could not be observed in trials with a test solution (without skin material), so that here the cause has to be searched for in an interaction between fatliquor, skin substance, and magnesium ions. |
| En ligne : |
https://drive.google.com/file/d/154Xin31JkdpUmp34t-Vc8ItLNfBh7gZ5/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4406 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCV, N° 1 (01/2000) . - p. 11-18
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Influence of fatliquoring agents on the development of pH-values in the chrome tannage in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCV, N° 1 (01/2000)
