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Acrylic-urethane hybrid polymers : materials with high potential in leather finishing / L. Krings in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CV, N° 12 (12/2010)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CV, N° 12 (12/2010) . - p. 388-394 Titre : Acrylic-urethane hybrid polymers : materials with high potential in leather finishing Type de document : texte imprimé Auteurs : L. Krings, Auteur ; M. Jimenez, Auteur ; M. Oliveras, Auteur ; J. M. Pont Pi, Auteur Année de publication : 2010 Article en page(s) : p. 388-394 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuirs et peaux Matériaux hybrides Polyacryliques Polyuréthanes Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Hybrid materials based on polyurethanes on polyacrylics are a very interesting class of materials combining unique properties with cost advantages over traditional polyurethanes. Until now the use of these materials have not yet been used at their full potential. Beside the technical advantages of combining the properties of acrylics and urethanes in one materials, the hybrid concept has significant advantages when it comes to environmental issues such as co-solvent-free and even VOC-free. In this paper the concept of these hybrid materials will be explained and both the technical and environmental opportunities will be discussed. En ligne : https://drive.google.com/file/d/1iZgUf1IPQ8sAX1fmjStzoBuuAslwAG1d/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10503 [article]

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Development of natural garment leathers : a metal-free approach / Kalarical Janardhanan Sreeram in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CV, N° 12 (12/2010)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CV, N° 12 (12/2010) . - p. 401-409 Titre : Development of natural garment leathers : a metal-free approach Type de document : texte imprimé Auteurs : Kalarical Janardhanan Sreeram, Auteur ; Rathinam Aravindhan, Auteur ; Jonnalagadda Raghava Rao, Auteur ; Balachandran Unni Nair, Auteur Année de publication : 2010 Article en page(s) : p. 401-409 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acacia et constituants Cuirs et peaux -- Propriétés organoleptiques Polyamides Un polyamide est un polymère contenant des fonctions amides -C(=O)-NH- résultant d'une réaction de polycondensation entre les fonctions acide carboxylique et amine. Selon la composition de leur chaîne squelettique, les polyamides sont classés en aliphatiques, semi-aromatiques et aromatiques. Selon le type d'unités répétitives, les polyamides peuvent être des homopolymères ou des copolymères. Tannage végétal Vêtements en cuir Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Growing concerns over the toxicity of chromium and its influence on the health of customers using chromium tanned garment leathers has forced the leather industry to search for alternative tanning agents. Semi-metal tanning agents, aldehyde based systems, etc. Semi-metal tanning agents, aldehyde based systems, etc. have been considered but the toxicity issues are lingering. Hence, in the present study an attempt has been made to develop vegetable tannins and subsequent stripping prior to retanning and fatliquoring has been evaluated. It has been found that an 8 % offer of wattle for tanning provides better physical and organoleptic properties. A polyamide based retanning system was found to offer better perspiration and organoleptic properties. Amongst the various fatliquoring compositions, 50:50 combination of synthetic and natural fatliquors was found to offer higher softness. The optimized tanning-retanning-fatliquoring combination was found to be comparable to chrome tanned garment leathers and superior to semichrome garment leathers. En ligne : https://drive.google.com/file/d/1ySWQQy7he2G3jwUybArcpd85X-LxcoHQ/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10504 [article]

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Determination of dimethylfumarate in leather and footwear by solid-phase micro extraction and gas chromatography-mass spectrometry / Rosa M. Cuadros in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CV, N° 12 (12/2010)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CV, N° 12 (12/2010) . - p. 395-400 Titre : Determination of dimethylfumarate in leather and footwear by solid-phase micro extraction and gas chromatography-mass spectrometry Type de document : texte imprimé Auteurs : Rosa M. Cuadros, Auteur ; Joaquim Font, Auteur ; M. Reyes, Auteur ; Lluis Ollé, Auteur ; Agusti Marsal, Auteur Année de publication : 2010 Article en page(s) : p. 395-400 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antifongiques Chaussures Chromatographie en phase gazeuse Extraction (chimie) Fumarate de diméthyle Spectrométrie de masse Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In the last two years, Europe has experienced a rise in skin allergy and dermatitis due to goods of an Asian provenance that have been treated with dimethylfumarate (DMFU). Accordingly, laboratories in the leather and footwear sectors have been obliged to develop analytical methods to determine the presence of this substance given the absence of an official method. The ban on DMFU as laid down in Decision 2009/251 of the European Union establishes a maximum concentration of DMFU in products of 0.1 mg/kg. A simple non-destructive rapid method based on manual headspace solid-phase micro extraction (HS-SPME) and gas chromatography-mass spectrometry (GC-MS) is proposed to detect DMFU in leather and footwear. Thereafter, the samples in which DMFU is detected are analysed by a solid-liquid extraction (SLE) with acetone after which DMFU is quantitatively determined by GC-MS. The quantitative method is validated in terms of linearity, precision, sensitivity and recovery; demonstrating its reliability. Quantification is performed using naphthalene-D8 as internal standard. The detection limits are 0.005 mg/kg and 0.03 mg/kg for the HS-SPME-GC-MS and SLE-GC-MS methods, respectively. Given that these limits are below the maximum limit of 0.1 mg/kg imposed by the European Union, the proposed methods are suitable for determining DMFU content in real samples. En ligne : https://drive.google.com/file/d/1eWiehT0YKU5tnSg5VmUDIAbw7NBWyiYC/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10505 [article]

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