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Chemistry of syntans studies on the chemistry of syntans - Part I - Mixed condensation products / W. Madhu Latha in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXIX (Année 1984)
[article]
Titre : Chemistry of syntans studies on the chemistry of syntans - Part I - Mixed condensation products Type de document : texte imprimé Auteurs : W. Madhu Latha, Auteur ; V. S. Sundara Rao, Auteur ; K. K. Reddy, Auteur ; K. N. S. Sastry, Auteur Année de publication : 1984 Article en page(s) : p. 246-251 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuirs et peaux
Produits de condensation (chimie)
Sulfonation
Syntans
Tanins -- analyse
Tannage synthétiqueIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Studies on the mixed or co-condensation of sulphonated and unsulphonated novolacs indicate that during the process of mixing of both sulphonated and unsulphonated products, one-third of the novolac added is getting sulphonated and two-thirds is in dispersed form. However, on final condensation, only one-fifth remains in free form and the rest of the novolac is involved in the formation of the mixed condensation product. Note de contenu : - Analytical methods
- Materials
- NOVOLAC preparation
- Sulphonation of the NOVOLAC
- Tanning studies
- Table 1 : Tannin analysis of the mixed condensation products (expressed on 12 % moisture basis)En ligne : https://drive.google.com/file/d/1lztO8RRQ9M8NrxN635QNrCn37_gYet1x/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41555
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXIX (Année 1984) . - p. 246-251[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 008084 - Périodique Bibliothèque principale Documentaires Disponible Studies on the chemistry of syntans - Part II : chemistry of mixed condensation products / W. Madhu Latha in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 69 (Année 1985)
[article]
Titre : Studies on the chemistry of syntans - Part II : chemistry of mixed condensation products Type de document : texte imprimé Auteurs : W. Madhu Latha, Auteur ; V. S. Sundara Rao, Auteur ; K. N. S. Sastry, Auteur ; K. K. Reddy, Auteur Année de publication : 1985 Article en page(s) : p. 17-18 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The development of syntans dates back to 1805 and the first commercial product appeared on the market in 1912. However, the amount of literature published or available on the chemistry of syntans is very limited. Generally, commercial products are first developed and marketed without publishing the details concerning their chemistry. As these products are tailor-made and meant for specific end-use, studies on their chemistry are very essential so that improvements in their properties can be made. It is with the object of understanding the chemical nature of syntans that studies have been carried out on the cehmistry of those base on the mixed condensation of sulphonated and unsolphonated novolacs. The results are reported in the present communication. The preparation, properties and utilisation of the syntan have been given in our previous communications. Note de contenu : - Experimental.
- Preparation and purification of the product.
- Separation and characterisation of the constituents present i the mixed condensation product.
- Separation and identification of constituents present in fraction 3-7.En ligne : https://drive.google.com/file/d/1_Fydy4WX2dpNELhwgZfhLxEhrnk87VG8/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9397
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 69 (Année 1985) . - p. 17-18[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007132 - Périodique Bibliothèque principale Documentaires Disponible