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Synthesis of diamino diphenyl methane (DDM) isomers using modified dealuminated HY catalyst for wire enamel resins / Vinayak Anant Bhanu in PAINTINDIA, Vol. LIX, N° 5 (05/2009)
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Titre : Synthesis of diamino diphenyl methane (DDM) isomers using modified dealuminated HY catalyst for wire enamel resins Type de document : texte imprimé Auteurs : Vinayak Anant Bhanu, Auteur ; K. K. Panchal, Auteur ; C. K. Joshi, Auteur ; S. T. Shinde, Auteur ; G. Stevens, Auteur ; R. Kumar, Auteur ; A. P. Singh, Auteur ; V. V. Bokade, Auteur ; P. N. Joshi, Auteur Année de publication : 2009 Article en page(s) : p. 77-86 Note générale : Bibliogr. Langues : Anglais (eng) Tags : Wire enamel Diamino diphenyl methane Zeolite catalyst Index. décimale : 667.9 Revêtements et enduits Résumé : This work focuses on the synthesis of di amino diphenyl methane (DDM) using heterogeneous zeolite catalyst and evaluating its suitability in the wire enamel resins. The study consists of optimization of reaction conditions for making DDM isomer mixture containing at least 75 % of 4,4'-DDM isomer. Out of the three catalysts studied (H ZSM 5, H Beta and CBV 720), CBV 720 was found to perform well. CBV 720 was furthermodified with boric acid, phosphoric acid and tetra ethyl ortho silicate to prepare new catalysts with comparable efficacy. The DDM mixture made with boron modified CBV 720 was found suitable for preparing a polyester imide wire enamel resin. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=6656
in PAINTINDIA > Vol. LIX, N° 5 (05/2009) . - p. 77-86[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 011488 - Périodique Bibliothèque principale Documentaires Disponible Chemistry of syntans and their influence on leather quality / Jochen Ammenn in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CX, N° 11 (11/2015)
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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
TannageTags : '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 : 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[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17581 - Périodique Bibliothèque principale Documentaires Disponible