Effect of vinyl acetate grafting on the dyeability of chrome leather / O. A. Mohamed in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 6 (11-12/2004)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 88, N° 6 (11-12/2004) . - p. 231-235 Titre : Effect of vinyl acetate grafting on the dyeability of chrome leather Type de document : texte imprimé Auteurs : O. A. Mohamed, Auteur ; A. A. Haroun, Auteur ; N. H. El-Sayed, Auteur Année de publication : 2004 Article en page(s) : p. 231-235 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acétate de vinyle L'acétate de vinyle est l'ester de l'acide acétique (acide éthanoïque) avec le tautomère alcoolique de l'éthanal (acétaldéhyde) et de formule semi-développée, CH3COO–CH=CH2. L'acétate de vinyle est préparé, en règle générale, en phase vapeur, en faisant réagir un grand excès d'acétylène sur de l'acide acétique (200 °C) en présence de catalyseurs au zinc et au cadmium). On obtient un liquide incolore à odeur très pénétrante qui ne se polymérise en polyacétate de vinyle (PVAC) qu'en présence de catalyseurs et donne des solides durs très stables à la chaleur. Il peut être copolymérisé avec d'autres composés vinyliques ou d'autres monomères. Colorants réactifs Colorants vinyl sulfones Cuirs et peaux -- Teinture Fixation (chimie) Greffage (chimie) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : This study is concerned with enhancing the dyeability of leather using a vinyl acetate monomer. The application of a vinyl sulfone reactive dye to the grafted leather revealed that vinyl acetate imparted additional sites to the leather available for attachment of the reactive dye. Note de contenu : - MATERIALS AND METHODS : Grafting methods - Standard dyeing method - Dyeing properties - RESULTS AND DISCUSSION : 1- Effect of monomer concentration on the degree of grafting - 2- Effect of ceric ammonium sulfate level on the degree of grafting - 3- Effect of pH on the degree of grafting - Table 1 : Effect of vinyl acetate monomer on the grafting yield of leather - Table 2 : Effect of ceric ammonium sulfate on the grafting yield of leather - Table 3 : Effect of pH of the grafting yield of leather - Table 4 : Effect of vinyl acetate monomer on the dyeing measurements of grafted and dyed leather with Amecid Floxine 2GN - Table 5 : Effect of vinyl acetate monomer on the CIE-lab parameters of grafted and dyed leather using Amecid Floxine 2GN - Table 6 : Effect of ceric ammonium sulfate on the dyeing measurements of grafted and dyed leather with Amecid Floxine 2GN - Table 7 : Effect of ceric ammonium sulfate on the CIE-lab parameters of grafted and dyed leather with Amecid Floxine 2GN - Table 8 : Effect of grafting pH on the dyeing measurements and CIE-lab of grafted and dyed leather with Amecid Floxine 2GN - Table 9 : Comparison between the dyeing measurements of ungrafted and grafted leather dyed with Amecid Floxine 2GN - Table 10 : Comparison between the CIE-lab parameters of ungrafted and grafted leather dyed with Amecid Floxine 2GN - Table 11 : Comparison between the dyeing measurements of ungrafted and grafted leather dyed with Remazol Black B - Table 12 : Comparison between the CIE-lab parameters of ungrafted and grafted leather dyed with Remazol Black B - Table 13 : Fastness properties of grafted and dyed leather with Amecid Floxine 2GN - Table 14 : Fastness properties of grafted and dyed leather with Remazol Black B En ligne : https://drive.google.com/file/d/1hTOPUPKnbiSpdbm-A2I_htEtxI-ziq2j/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39615 [article]

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The dyeing of wash and dry cleaning fast chamois leather with vinyl sulphone dyestuffs / R. D. Seyd in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 54, N° 11 (11/1970)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 54, N° 11 (11/1970) . - p. 405-408 Titre : The dyeing of wash and dry cleaning fast chamois leather with vinyl sulphone dyestuffs Type de document : texte imprimé Auteurs : R. D. Seyd, Auteur Année de publication : 1970 Article en page(s) : p. 405-408 Langues : Anglais (eng) Catégories : Colorants réactifs Colorants vinyl sulfones Cuirs et peaux -- Teinture Cuirs et peaux de Chamois Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Undoubtedly, the leather dyeing industry is striving to obtain better fastness properties in dyeing. Highest fastness properties are demanded of glove and clothing suede leather. For these good wash and solvent fastness properties are desired. But requirements for light, water and perspiration fastness are also of considerable importance. As chamois tannages are stable to alkali, and also washable, they recently have found use for the manufacture of fashionable dress goods. Reactive dyestuffs with a vinyl sulphone group (which include the Remazol dyestuffs) make comparatively high fastness properties on chamois leather possible, which to a very far degree fulfil the fastness demands mentioned in the above. Amongst other dyestuffs that are used for the dyeing of chamois leather are sulphur dyestuffs and anthrasol dyestuffs, which give dyeings with good light and wash fastness. With sulphur dyestuffs, however, the dyeings to be obtained are rather dull in shade. Anthrasol dyestuffs have extremely high prices. When dyeing with these dyestuffgroups they must be made water soluble or in the case of anthrasol dyestuffs are already available in the water soluble form, which is absorbed by the leather and then irreversibly transformed into an insoluble dyestuff, which is very wet fast. When using Azoic Naphtol AS compounds in combination with Azanil or fast colour salts the dyeing process is similar. When using reactive dyestuffs a genuine chemical linkage between dyestuff and collagen takes place, which is responsible for the fastness properties. Chamois tanned suede leather is one of the few kinds of leather that are stable to washing and mild alkalis. It is therefore possible to dye in alkaline liquors and to use vinyl sulphone dyestuffs, which are dyed from such liquors. Note de contenu : - The vinyl sulphone dyestuffs - Application of vinyl sulphone dyestuffs - Dyeing procedure - Properties of dyeing with vinyl sulphone dyestuffs En ligne : https://drive.google.com/file/d/1zCpn7V0yu7aEOHGuRb0SX0pxZydRE9IW/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37024 [article]

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