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Oxazolidines - A new class of tanning agents / Samir Dasgupta in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61, N° 5 (09-10/1977)
[article]
Titre : Oxazolidines - A new class of tanning agents Type de document : texte imprimé Auteurs : Samir Dasgupta, Auteur Année de publication : 1977 Article en page(s) : p. 97-105 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents de tannage
Chaleur humide
Croûte (cuir)On entend par "cuir en croûte" des cuirs ayant subi les opérations jusqu'au tannage, à l'exclusion de toute opération de corroyage ou de finissage, mais qui, par opposition aux wet-blue ont été séchés.
Cuir -- Teneur en chrome trivalent
Cuirs et peaux -- Analyse
Cuirs et peaux de moutons
Oxazolidine
Résistance à la déchirure
Résistance à la traction
Tannage au chrome
Tannage combinéLe tannage combiné se dit des tannages qui allient deux familles ou genre de tannage pour obtenir un résultat additionnant les qualités complémentaires des tannins mis en œuvre par exemple Chrome-Végétal ou Chrome-Synthétique
Tannage végétal
TranspirationIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Oxazolidines are heterocyclic derivatives obtained by the reaction of aminohydroxy compounds with aldehydes. The bifunctional behaviour of these oxazolidines is responsible for their cross-linking reactions with phenols and proteins. Two typical oxazolidines, namely 4,4-Dimethyl-1,3-oxazolidine and 1-Aza-3,7-dioxabicyclo-5-ethyl (3,3,0) Octane have been studied extensively for their use as tanning agents and it has been found that both these oxazolidines react with hide protein and impart special characteristics to leather when tanned in conjunction with syntan, chrome or vegetable tanning materials.
4,4-Dimethyl-1,3-oxazolidine has been found especially suitable for pretanning of greasy pickled sheepskins, subsequently to be degreased with aqueous degreasing systems. Pickled sheepskin even at 3-5 % level of application gives shrinkage temperatures around 70-75°C within an hour of treatment and unlike glutaraldehyde, the pretanned leather remains natural white and so may be finally tanned with syntan or zirconium for white leather.
1-Aza-3,7-dioxabicyclo-5-ethyl (3,3,0) Octane on the other hand has been found suitable for chrome or vegetable combination tannages of all kinds of leather, especially wool skin tannages where the wool remains spotless white even if the pH of the exhaust chrome liquor moves up to 4.5. Vegetable tanned leather pre-treated with 1-Aza-3,7-dioxabicyclo-5-ethyl (3,3,0) Octane gives higher degree of tannage, higher shrinkage temperature and about 50 % lower water solubles than conventional tannage. Normal vegetable tanned leather when retanned with about 10 % of 1-Aza-3,7-dioxa-bicyclo-5-ethyl (3,3,0) Octane for an hour gives a shrinkage temperature around 100°c. Fuither, it has been found that the use of oxazolidine affords better utilisation of chrome when used in chrome tanning. The reduced chrome content in the exhaust liquors helps in pollution control.Note de contenu : - EXPERIMENTAL : Effect of initial pH and time - Effect of concentration - Tannage in combination with chrome - Tannage in combination with vegetable tanning materials - Comparison with glutaraldehyde-chrome combination tannages. Oxazoliding I vs. glutaraldehyde on pretannages of skins - Oxazolidine II vs. Glutaraldehyde on chrome tanning of sheepskins - Oxazolidine II vs. glutaraldehyde on vegetable tannage of sheepskins
- Table 1 : Typical properties of oxazolidines
- Table 2 : Chrome content of finished leather
- Table 3 : Tear strength of finished leather
- Table 4 : Tensile strength of finished leather
- Table 5 : Effect of moist heat on leather
- Table 6 : Effect of perspiration solution on leather
- Table 7 : Tensile strength of vegetable tanned crust leather
- Table 8 : Tear strength of vegetable tanned crust leather
- Table 9 : Chemical analysis of vegetable tanned crust leather
- Table 10 : Effect of moist heat on vegetable leather
- Table 11 : Effect of perspiration solution on vegetable tanned leatherEn ligne : https://drive.google.com/file/d/1G6mpUYSZp3ekgWrtLRMORyPSpD2O_avE/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34125
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 61, N° 5 (09-10/1977) . - p. 97-105[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007114 - Périodique Bibliothèque principale Documentaires Disponible Oxazolidines - A new class of tanning agents / Samir Dasgupta in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)
[article]
Titre : Oxazolidines - A new class of tanning agents Type de document : texte imprimé Auteurs : Samir Dasgupta, Auteur Année de publication : 1978 Article en page(s) : p. 97-105 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents de tannage
Chaleur humide
Croûte (cuir)On entend par "cuir en croûte" des cuirs ayant subi les opérations jusqu'au tannage, à l'exclusion de toute opération de corroyage ou de finissage, mais qui, par opposition aux wet-blue ont été séchés.
Cuir -- Teneur en chrome trivalent
Cuirs et peaux -- Analyse
Cuirs et peaux de moutons
Oxazolidine
Résistance à la déchirure
Résistance à la traction
Tannage au chrome
Tannage combinéLe tannage combiné se dit des tannages qui allient deux familles ou genre de tannage pour obtenir un résultat additionnant les qualités complémentaires des tannins mis en œuvre par exemple Chrome-Végétal ou Chrome-Synthétique
Tannage végétal
TranspirationIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Oxazolidines are heterocyclic derivatives obtained by the reaction of aminohydroxy compounds with aldehydes. The bifunctional behaviour of these oxazolidines is responsible for their cross-linking reactions with phenols and proteins. Two typical oxazolidines, namely 4,4-Dimethyl-1,3-oxazolidine and 1-Aza-3,7-dioxabicyclo-5-ethyl (3,3,0) Octane have been studied extensively for their use as tanning agents and it has been found that both these oxazolidines react with hide protein and impart special characteristics to leather when tanned in conjunction with syntan, chrome or vegetable tanning materials.
4,4-Dimethyl-1,3-oxazolidine has been found especially suitable for pretanning of greasy pickled sheepskins, subsequently to be degreased with aqueous degreasing systems. Pickled sheepskin even at 3-5 % level of application gives shrinkage temperatures around 70-75°C within an hour of treatment and unlike glutaraldehyde, the pretanned leather remains natural white and so may be finally tanned with syntan or zirconium for white leather.
1-Aza-3,7-dioxabicyclo-5-ethyl (3,3,0) Octane on the other hand has been found suitable for chrome or vegetable combination tannages of all kinds of leather, especially wool skin tannages where the wool remains spotless white even if the pH of the exhaust chrome liquor moves up to 4.5. Vegetable tanned leather pre-treated with 1-Aza-3,7-dioxabicyclo-5-ethyl (3,3,0) Octane gives higher degree of tannage, higher shrinkage temperature and about 50 % lower water solubles than conventional tannage. Normal vegetable tanned leather when retanned with about 10 % of 1-Aza-3,7-dioxa-bicyclo-5-ethyl (3,3,0) Octane for an hour gives a shrinkage temperature around 100°c. Fuither, it has been found that the use of oxazolidine affords better utilisation of chrome when used in chrome tanning. The reduced chrome content in the exhaust liquors helps in pollution control.Note de contenu : - EXPERIMENTAL : Effect of initial pH and time - Effect of concentration - Tannage in combination with chrome - Tannage in combination with vegetable tanning materials - Comparison with glutaraldehyde-chrome combination tannages. Oxazoliding I vs. glutaraldehyde on pretannages of skins - Oxazolidine II vs. Glutaraldehyde on chrome tanning of sheepskins - Oxazolidine II vs. glutaraldehyde on vegetable tannage of sheepskins
- Table 1 : Typical properties of oxazolidines
- Table 2 : Chrome content of finished leather
- Table 3 : Tear strength of finished leather
- Table 4 : Tensile strength of finished leather
- Table 5 : Effect of moist heat on leather
- Table 6 : Effect of perspiration solution on leather
- Table 7 : Tensile strength of vegetable tanned crust leather
- Table 8 : Tear strength of vegetable tanned crust leather
- Table 9 : Chemical analysis of vegetable tanned crust leather
- Table 10 : Effect of moist heat on vegetable leather
- Table 11 : Effect of perspiration solution on vegetable tanned leatherEn ligne : https://drive.google.com/file/d/1G6mpUYSZp3ekgWrtLRMORyPSpD2O_avE/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35215
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 61 et 62 (Années 1977 et 1978) . - p. 97-105[article]Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 008597 - Périodique Archives Documentaires Exclu du prêt Reactive oxazolidine moisture control / Thomas Johnson in EUROPEAN COATINGS JOURNAL (ECJ), N° 7-8/95 (07-08/1995)
[article]
Titre : Reactive oxazolidine moisture control : Additives for PU coatings Type de document : texte imprimé Auteurs : Thomas Johnson, Auteur Année de publication : 1995 Article en page(s) : p. 530-533 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Haut extrait sec
Oxazolidine
Polyuréthanes
Résistance à l'humidité
Revêtements -- Additifs:Peinture -- AdditifsIndex. décimale : 667.9 Revêtements et enduits Résumé : Novel moisture control additives have been developed for use in higher solids polyurethane coatings. These oxazolidine-based compounds eliminate the adverse effects of humidity often seen during the application of two-pack polyurethane systems. Problems such as down glossing, pinholing, hazing and bubble entrapment can be prevented with proper application of this chemistry. These additives also remove moisture from one- and two- pack polyurethane coatings during their manufacture, thus providing superior shelf life and film properties. Note de contenu : - Effects of moisture polyurethane coatings
- Oxazolidine chemistry
- Hydrolysis screening
- Pigment grind drying
- One-component systems
- Humidity control
VIII- Film propertiesPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11351
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 7-8/95 (07-08/1995) . - p. 530-533[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 002506 - Périodique Bibliothèque principale Documentaires Disponible Scavenge moisture and cut pinholes in a trice / Neil Carter in EUROPEAN COATINGS JOURNAL (ECJ), N° 6 (06/2012)
[article]
Titre : Scavenge moisture and cut pinholes in a trice : Oxazolidine latent hardeners in polyurethane systems Type de document : texte imprimé Auteurs : Neil Carter, Auteur Année de publication : 2012 Article en page(s) : p. 18-21 Langues : Anglais (eng) Catégories : Etanchéité
Oxazolidine
Polyuréthanes
Réticulants
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : The popularity of polyurethane chemistry in construction sealants is growing. However, moisture ingress and pinholing can be a problem. Oxazolidine latent hardeners can overcome these drawbacks. Note de contenu : - Gassing eliminated
- Formulation hurdles
- Better film appearanceEn ligne : https://drive.google.com/file/d/1HF9yyQRPwAvSe_n8Vr-TjzwKpyLIjQHj/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15136
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 6 (06/2012) . - p. 18-21[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13942 - Périodique Bibliothèque principale Documentaires Disponible Solving polyurethane formulation problems / Neil Carter in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 201, N° 4558 (03/2011)
[article]
Titre : Solving polyurethane formulation problems Type de document : texte imprimé Auteurs : Neil Carter, Auteur ; Craig Evans, Auteur ; Steve Easthope, Auteur Année de publication : 2011 Article en page(s) : p. 36-37 Langues : Anglais (eng) Catégories : Oxazolidine
Polyuréthanes
Revêtements:PeintureIndex. décimale : 667.9 Revêtements et enduits Résumé : Use of oxazolidines to overcome moisture-related formulation issues. Note de contenu : - Improvements in performance properties
- Reducing VOCs in polyurethane formulations
- Improving film appearance
- Main applications
- DevelopmentsEn ligne : https://drive.google.com/file/d/14NuO8jWv5E4YCBY1BpLlUQMa0nTyyZNo/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11140
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 201, N° 4558 (03/2011) . - p. 36-37[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012918 - Périodique Bibliothèque principale Documentaires Disponible Synthesis of an amphoteric polymer auxiliary agent and its application to chrome-free leather / Luo Jianxun in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 6 (11-12/2018)
PermalinkThe influence of solvents on hydrothermal stability and microstructure of combination tannage / Wang Yajuan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 96, N° 2 (03-04/2012)
PermalinkThe reaction of vegetable tannin-aldehyde-collagen - A further understanding of vegetable tannin-aldehyde combination tannage / Zhongbing Lu in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 87, N° 5 (09-10/2003)
PermalinkUltra-low viscosity oxazolidine and aldimine-based reactive diluents for high-solids polyurethane coatings / Thomas L. Johnson in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 67, N° 849 (10/1995)
PermalinkWet-white leather processing : a new complex combination tannage / Luo Jianxun in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 95, N° 3 (05-06/2011)
PermalinkZirconium acetate - Oxazolidine combination tannages in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 94, N° 4 (07-08/2010)
PermalinkZirconium-oxazolidine combination tannage for sheep garment leather / Qiang Tao-Tao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 93, N° 2 (03-04/2009)
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