Comparison of the properties of black dyestuffs / J. Berenguer in WORLD LEATHER, Vol. 15, N° 2 (04/2002)  

[article]  inWORLD LEATHER > Vol. 15, N° 2 (04/2002) . - p. 57-64 Titre : Comparison of the properties of black dyestuffs Type de document : texte imprimé Auteurs : J. Berenguer, Auteur ; A. Navarro, Auteur ; M. Dien, Auteur Année de publication : 2002 Article en page(s) : p. 57-64 Langues : Anglais (eng) Catégories : Colorants -- Propriétés physiques Colorants -- Propriétés tinctoriales Colorants -- Toxicologie Noir (couleur) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : More than twenty years ago, the black dyestuff market was almost entirely covered by benzidine or benzidine-derivate dyes. The fact that benzidine is a known carcionegic compond obligeed the development of new black dyes which were not based on benzidine. This stopped the production of these dyes in the developed countries, although still available from the developing sector. The recent German legislation on carcinogenic amines has had the effect of an almost complete elimination of these dyes from the market. Furthermore, the analysis performed on commercial dyes has also led to the conclusion that there is a direct relationship between the use of aniline diazo and the formation of 4-aminobiphenyl, one of the forbidden amines. These two aspects - carcinogenic aromatic amines and metal content - has guided the research to a new generation of black dyes which could overcome these problems. Note de contenu : - DYESTUFFS SELECTED - PHYSICAL PROPERTIES - TOXICOLOGICAL PROPERTIES : Presence of metals in the dyes - Mutagenicy - Presence of aromatic amines - TINCTORIAL PROPERTIES : Fastness levels - Fur dyeing - Leather dyeing - Spectrophotometic measurements - Solubility and stability - Hydrophobic-hydrophilic balance (hhb) values - TOXICOLOGICAL PROPERTIES : Metal content - Mutagenicy - Aromatic amines - TINCTORIAL PROPERTIES : Fastness - Fur dyeing - Leather dyeing - Fig. 1 : Dyes studies - Fig. 2 : Concentration in solution - Fig. 3 : Colour coordinates of the dyes studies - Fig. 4 : Physical properties of the sample - Fig. 5 : HHB values of the anionic dyes - Fig. 6 : Results of the ames test with and without the prival modification - Fig. 7 : Aromatic amines content - Fig. 8 : Fastness results - Fig. 9 : Co-ordinate L* of of the leather substrate in fur dyeing - Fig. 10 : Values for co-ordinate L* in wool dyeing - Fig. 11 : Relative intensity of the dyeings - Fig. 12 : Lightfastness results (72h) - Fig. 13 : Perspiration fastness values on cotton En ligne : https://drive.google.com/file/d/1z7p_QHTmdoedxYM8WSGQYLJWcSiJadgR/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32202 [article]

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Comparison of the properties of black dyestuffs new developments / J. Berenguer in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVI, N° 3 (03/2001)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCVI, N° 3 (03/2001) . - p. 79-87 Titre : Comparison of the properties of black dyestuffs new developments Type de document : texte imprimé Auteurs : J. Berenguer, Auteur ; M. Dien ; A. Navarro, Auteur Année de publication : 2001 Article en page(s) : p. 79-87 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure En ligne : https://drive.google.com/file/d/1bB4piUVQK34268-gTk4Lr-u2SKTjjgfu/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4389 [article]

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Formulation for the properties/structure relationship studies on leather dyestuffs / J. Berenguer in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCIV, N° 2 (02-03/1999)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCIV, N° 2 (02-03/1999) . - p. 43-50 Titre : Formulation for the properties/structure relationship studies on leather dyestuffs Type de document : texte imprimé Auteurs : J. Berenguer, Auteur ; J. Rocas, Auteur ; M. Dien, Auteur Année de publication : 1999 Article en page(s) : p. 43-50 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The development of a new range of dyestuffs requires a large amount of both synthetic and application work. In order to reduce the number of experiments, it was necessary to develop tools that can give in advance an idea about some properties of the designed dyestuffs. Based on previous theoretical studies, an empirical formula was used to develop a new range of compatible dyestuffs with high fastness. This formula defined the socalled WHAI value, which is obtained by the divison of the molecular weight by the number of azo and ionic groups and the hydrophobicity of the dye. This approach is useful for synthesizing both metal and non metal complex dyes. The new dyes were screened with spectrophotometric measurements, dyeing on leather fibres, physical property measurements (solubility, stability to acids and alkalis...), leather dyeings, fastness and range combinability. Results shown in a previous communication are expanded with three new dyes, one of them being a non-metal complex. The application results showw the ability of the new range to obtain almost all the possible shades in deep, level dyeings. Note de contenu : - Properties/Structure relationship - Dye synthesis En ligne : https://drive.google.com/file/d/1HaMgGNxcXharMCRZ0mMk-0dI8--tuHE7/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4487 [article]

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