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Tanning with natural polymeric materials. Part 1 : Ecofriendly tanning using dialdehyde sodium alginate / Swarna Vinodh Kanth in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 91, N° 6 (11-12/2007)
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Titre : Tanning with natural polymeric materials. Part 1 : Ecofriendly tanning using dialdehyde sodium alginate Type de document : texte imprimé Auteurs : Swarna Vinodh Kanth, Auteur ; Balaraman Madhan, Auteur ; M. J. Philo, Auteur ; S. Mithuna, Auteur ; J. R. Rao, Auteur ; B. U. Nair, Auteur Année de publication : 2007 Article en page(s) : p. 252-259 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents de tannage
Alginate de sodium dialdéhyde
Caractérisation
Cuirs et peaux -- Propriétés organoleptiques
Cuirs et peaux de chèvres
Oxydation
Réticulation (polymérisation)
Tannage synthétique
Température de retraitIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The characteristics of DSA as a tanning agent have been investigated using DSA prepared by selective periodate oxidation of the natural polymer sodium alginate (SA). Shrinkage temperature and enzyme stability of leathers at varied DSA concentrations, pH, and time were examined, treatment of goatskins gave a maximum shrinkage temperature of 80°C at pH8. The formation of the crosslinks between DSA and the collagen of goatskins gav significant stability to leathers against enzymatic degradation (collagenase). The degree of crosslinking was studied using trinitrobenzene sulphonic acid (TNBS). The degree of crosslinking was found to increase with the increase in degree of oxidation of SA and the concentration of DSA. In this investigation, the properties of DSA tanned leathers are discussed and the tannage optimized. The DSA leathers were compared with chrome-tanned leathers for handle. Note de contenu : - EXPERIMENTAL PROCEDURES : Reagents - Periodate oxidation of sodium alginate - Determination of degree of oxidation - Determination of dialdehyde content - Solubility of DSA - Determination of pH
- TANNING TRIALS USING DSA - EFFECT OF VARIOUS PARAMETERS : Influence of fatliquor - Comparison of DSA leathers with control leathers - Estimation of aldehyde fixed to collagen - Collagenase hydrolysis of the dialdehyde sodium alginate tanned leather - Measurement of degree of crosslinking - Organoleptic properties of tanned leathers
- RESULTS AND DISCUSSION : Characterization of tanning agent - Tanning Trials - Collagenase hydrolysis of DSA tanned leathers - Degree of crosslinking - Handle
- Table 1 : Tanning process using DSA from pickled goat skins
- Table 2 : Tanning process for control leathers
- Table 3 : Post tanning process for leathers tanned with DSA at different oxidation and BCS
- Table 4 : Periodate oxidation of DSA
- Table 5 : Shrinkage temperature, DSA fixation and collagen degradation of delimed pelt and DSA tanned leathers at varying conditions
- Table 6 : Degree of crosslinking of collagen treated with DSA of different oxidation levels/concentrations and pH results for 92% oxidized DSAEn ligne : https://drive.google.com/file/d/1PV7wgVS9JaIyGDMxGkxr3rU2tGiZMsGL/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39008
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 91, N° 6 (11-12/2007) . - p. 252-259[article]The application of catalysts and other additives to epoxy pretannage of hide / Mineo Masuoka in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. N° 71 (Année 1987)
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Titre : The application of catalysts and other additives to epoxy pretannage of hide Type de document : texte imprimé Auteurs : Mineo Masuoka, Auteur ; Masashi Makamura, Auteur Année de publication : 1987 Article en page(s) : p. 127-133 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Additifs
Catalyseurs
Composés organiques
Cuirs et peaux
Epoxydes
Prétannage
Tannage synthétiqueIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The acceleration effect of catalysts and other additives on the rise in the shrinkage temperature of hide treated with various multifunctional, water-soluble, epoxy resins was investigated in order to obtain information on a new pre-tanning method without chrome. The wet acetone-dehydrated hide specimen was treated with 10% epoxy resin (on the wet hide weight) at 35°C. The catalysts, 2,4,6,-tris(dimethylaminomethyl)phenol and dimethylaminopropylamine, both show an acceleration effect on the rise in the shrinkage temperature of the treated hide. Processing with the combined catalyst of 2,4,6-tris(dimethylaminomethyl)phenol and salicylic acid can markedly raise the shrinkage temperature over 80°C after 10 h. The epoxy resins, which have higher functionality or lower molecular weight, can rapidly raise the shrinkage temperature. Additives, such as methanol and ammonia, contribute to raising the shrinking temperature considerably. On the other hand, acids and anions show a negative effect upon it. Note de contenu : - EXPERIMENTAL : Hide Preparation - Epoxy resins, catalysts, and other agents - Epoxy treatment and T measurement
- RESULTS AND DISCUSSION : Effect of Catalysts on T - Effect of molecular weight and functionality of resins on Ts - Effect of Concentration and Final pH on Ts - Effect of Other Additives on Ts -
- Table 1 : Chemical structure and molecular weight of epoxy resins used
- Table 2 : Chemical structure of catalysts and accelerator processedEn ligne : https://drive.google.com/file/d/13EBEb1DL8whL-oW6awyrNaO9KvWZXngS/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40125
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. N° 71 (Année 1987) . - p. 127-133[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007135 - Périodique Bibliothèque principale Documentaires Disponible The correlation between composition of vinyl polymer tannages and their properties / Wei Wang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 85, N° 4 (07-08/2001)
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Titre : The correlation between composition of vinyl polymer tannages and their properties Type de document : texte imprimé Auteurs : Wei Wang, Auteur ; Jianzhong Ma, Auteur ; Zongsui Yang, Auteur ; Lingxian Feng, Auteur Année de publication : 2001 Article en page(s) : p. 140-143 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation
Cuirs et peaux -- Propriétés mécaniques
Polymères -- Synthèse
polymères vinyliques
Tannage synthétiqueIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The correlation between the composition of vinyl polymer tannages and their properties were studied by using the two-power regression orthogonal design. Six monomers (AN-acrylonitrile, AM-acrylic amide, MAA-methyl acrylic acid. MMA-methyl methacrylate. VAc-vinyl acetate, EA-ethyl acrylate) were chosen to copolyrnerize with acrylic acid (AA) to form the corresponding copolymers. Using these copolymers as tannages, ten indexes of retanning properties. e.g. thickness increment, shrinking temperature increment.
phys-mech properties, compressibility factor, were measured. Using regression analysis the experimental cognitive equations relating properties with composition of tannages were derived. The form is Yp = ax2 + bx + c (p. a, It, c are regression parameters). The influences of tannages composed with different comonomers on the properties of leather samples are also discussed.Note de contenu : - Experimental details : Design - Synthesis -
- Application : Materials and equipment - Application procedures
- Characterisation of leather samples
- Results and discussion : The experiment data - Data pret-treatment - Quantitative correlation between composition and properties - Optimization and verification of result
- Conclusions : Qualitative conclusion - Quantitative conclusionEn ligne : https://drive.google.com/file/d/1vyfcZOwGoFcK1YgoBoGMc1tx3D0-7K4E/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40246
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 85, N° 4 (07-08/2001) . - p. 140-143[article]The correlation between the comonomer ratios of vinyl polymer tannages and their application properties / Jianzhong Ma in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 86, N° 2 (03-04/2002)
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Titre : The correlation between the comonomer ratios of vinyl polymer tannages and their application properties Type de document : texte imprimé Auteurs : Jianzhong Ma, Auteur ; Zongsui Yang, Auteur ; Shenhua Lu, Auteur ; Xinjiang Cheng, Auteur ; Wei Wang, Auteur ; Lingxian Feng, Auteur ; Genyuan Hu, Auteur Année de publication : 2002 Article en page(s) : p. 47-54 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.
Acide méthylacrylique
AcrylamideL'acrylamide ou 2-propénamide (amide acrylique) est un composé organique de formule brute C3H5NO. L'acrylamide est une substance CMR (cancérogène, mutagène et reprotoxique). Il est classé parmi les composés du groupe 2A (agents probablement cancérogènes) selon la classification du CIRC. Il est considéré par l'OMS comme présentant un risque pour la santé humaine. Il se forme spontanément lors de la cuisson (friture, rôtissage, etc.) à haute température (supérieure à 120 °C) d'aliments riches en glucides (amidon, sucres) et en protéines. L'acrylamide est utilisé en industrie dans la synthèse de polymères : les polyacrylamides. Ces derniers peuvent être utilisés comme liant, épaississant ou floculant dans le ciment, les emballages alimentaires et les produits de plastique employés en laboratoire ou même dans la préparation de pesticides et de cosmétiques.
Acrylate d'éthyle
Acrylate de butyle
acrylique, AcideL'acide acrylique ou acide acroléïque ou acide prop-2-énoïque est un composé organique de formule brute C3H4O2 et de formule semi-développée CH2=CHCOOH. C'est un acide carboxylique et un alcène vinylique, et se présente comme un liquide incolore à l'odeur âcre.
L'acide acrylique et ses esters, les acrylates, sont utilisés dans la fabrication de matières plastiques, dans les peintures acryliques et dans divers autres polyacryliques qui ont de multiples usages.
AcrylonitrileL'acrylonitrile est un nitrile de formule semi-développée CH2CHCN. C'est un liquide hautement inflammable d'odeur âcre. Il est un monomère utilisé dans la polymérisation de nombreuses fibres textiles (Orlon, Crylor® fabriquée par Rhône-Poulenc). En copolymérisation avec le butadiène, il fournit des élastomères « azotés » doués de propriétés remarquables, telles que la résistance aux huiles et aux agents chimiques, et avec le butadiène et le styrène, il forme des résines solides de hautes performances (résines ABS).
Agents de tannage
Copolymérisation
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux -- Propriétés organoleptiques
Cuirs et peaux -- Propriétés physiques
Cuirs et peaux de porcs
Méthacrylate de méthyle
Monomères
polymères vinyliques
Retannage
Tannage synthétiqueIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The correlations between the comonomer ratio of vinyl polymer tanning agents and their application properties were studied by the two-power regression orthogonal design. Eight monomers (AN-acrylonitrile, AM-acrylamide, MAA-methyl acrylic acid, MMA-methyl methacrylate, VAc-vinyl acetate, MA-methyl acrylate, EA-ethyl acrylate, BA-butyl acrylate) were separately chosen to copolymerize with acrylic acid (AA) to form the corresponding copolymers. We measured ten proper indexes of the application properties for each copolymer used in retanning such as thickness increment ratio, shrinking temperature increment, phy-mech properties, compressibility factor etc. The effects of the eight comonomers (AN, AM, MAA, MMA, VAc, MA, EA, BA) on the property indexes of the leather samples were also discussed.
It has been found that the comonomers with polar groups can increase the tensile strength and the shrinking temperature of the leather samples, but they may affect the softness of the leather samples and the pliability of the collagen fibrils. The comonomer of AM makes an outstanding contribution to the fullness of leather samples. The acrylate comonomers, such as MA, EA, BA, can improve the pliability of collagen fibrils of retanned leather samples and the improvement extent is related to the carbon chain length of the ester groups. The comonomers with methyl groups (such as MAA, MMA) can decrease the pliability of the leather samples.Note de contenu : - EXPERIMENTAL PROCEDURES : Application of tannages-see details in Table III - Determination of leather properties
- RESULTS AND DISCUSSIONS : Test results (Table IV–XIII )
- DISCUSSIONS :
- THEORETICAL ANALYSIS ABOUT THE EFFECT OF COMONOMER ON PROPERTIES OF RETANNED LEATHER : The fullness of leather - The softness of leather - Elasticity of leather - Strength and flexibility of leather fibres - Comonomer AM has a remarkable effect on the fullness of leather - The introduction of ester group in side group of tannages may give an increase in the flexibility of collagen fibres in the retanned leather - The introduction of polar group (such as -CN,-CONH2 increase the strength of the collagen fibres - The methyl group (side group) in the tannage does harm to the strength, softness, fullness of retanned leather and the flexibility of the collagen fibres
- Table 1 : Maximum ratios of comonomers
- Table 2 : Compositions of every comonomer (mole%)
- Table 3 : Retanning procedure of blue pigskin garment leather
- Table 4 : Effect of the kind and ratio of the comonomer on Thickness Increment Ratio 1 of retanned leather samples (%)
- Table 5 : Effect of the kind and ratio of the comonomer on Thickness Increment Ratio 2 of retanned leather samples (%)
- Table 6 : Effect of the kind and ratio of the comonomer on Shrinkage Temperatures of retanned leather samples (°C)
- Table 7 : Effect of the kind and ratio of the comonomer on the Tensile Strength of retanned leather samples (kg/mm2)
- Table 8 : Effect of the kind and ratio of the comonomer on the Unit Load Elongation Ratio of retanned leather samples (%)
- Table 9 : Effect of the kind and ratio of the comonomer on the Break Elongation Ratio of retanned leather samples (%)
- Table 10 : Effect of the kind and ratio of the comonomer on the Bursting Strength of retanned leather samples (kg/mm)
- Table 11 : Effect of the kind and ratio of the comonomer on Bursting Height of retanned leather samples (mm)
- Table 12 : Effect of the kind and ratio of the comonomer on Tearing Strength of retanned leather samples (kg/mm)
- Table 13 : Effect of the kind and ratio of the comonomer on Compressibility Factor of retanned leather samples
- Table 14 : Effect of the comonomers in the vinyl polymer tannages on the properties of retanned leather samplesEn ligne : https://drive.google.com/file/d/1cmL6Ph4ZvQ33HSy_PU6sSqXlhPQtJ1yQ/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40027
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 86, N° 2 (03-04/2002) . - p. 47-54[article]The role of acrylics in pigskin processing / William C. Prentiss in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 63, N° 2 (03-04/1979)
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Titre : The role of acrylics in pigskin processing Type de document : texte imprimé Auteurs : William C. Prentiss, Auteur Année de publication : 1979 Article en page(s) : p. 28-31 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Finition
Cuirs et peaux de porcs
Formulation (Génie chimique)
Polyacryliques
Retannage
Réticulation (polymérisation)
Syntans
Tannage synthétiqueIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : In my paper presented in Barcelona in 1975, various steps were discussed for processing pigskin to produce a quality leather. Stressed were the use of specialty, non-ionic degreasing surfactants at various steps in the processing sequence to control and remove grease, as well as the use of dimethyl amine and proper strength bating enzymes in the beamhouse to prepare the skins properly for subsequent tannage. Attention was given to the use of acrylics in both retanning and finishing. It is the aim of this paper to concentrate on the role of acrylics in processing pigskin, since these unique materials contribute properties to leather not easily obtained with others. Note de contenu : - Properties of the acrylic materials
- Some practical formulations
- Table 1 : Acrylic syntan - Typical values
- Table 2 : Effect of retannage on filling tempers
- Table 3 : Acrylic resin - Typical values
- Table 4 : Distribution of drum impregnating resin
- Table 5 : Effect of syntan level on resin exhaustion and leather break (8% resin applied)
- Table 6 : Effect of crosslinking on finished leather properties (high performance top coat)
- Table 7 : Retannage for white pigskin
- Table 8 : Finish system for white pigskins finish formula by volume
- Table 9 : Drum impregnation process
- Table 10 : Solid colour pigskin finish
- Table 11 : Inlay finish procedure
- Table 12 : Crunch distress finish procedureEn ligne : https://drive.google.com/file/d/1HuauSWKgdqdh42i3HGjUEWZl8skul3Xb/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34138
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 63, N° 2 (03-04/1979) . - p. 28-31[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007120 - Périodique Bibliothèque principale Documentaires Disponible The sulphonation of phenol-formaldehyde novolacs (Part 1) / J. Guthrie in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 66 (Année 1982)
PermalinkPermalinkWashability of glutaraldehyde-chrome tanned garment and glove leathers / S. J. Viola in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXI (Année 1966)
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