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Epoxidized fatty acid-derived oxazoline in thermoset coatings / David L. Trumbo in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 5, N° 1 (03/2008)
[article]
Titre : Epoxidized fatty acid-derived oxazoline in thermoset coatings Type de document : texte imprimé Auteurs : David L. Trumbo, Auteur ; J. T. Otto, Auteur Année de publication : 2008 Article en page(s) : p. 107-111 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Catalyseurs
Epoxydation
Métaux -- Revêtements
Oxazoline
Polyacryliques
ThermodurcissablesIndex. décimale : 667.9 Revêtements et enduits Résumé : An oxazoline with an unsaturated side chain was reacted with m-chloroperbenzoic acid in order to convert the unsaturation to oxirane moieties. The conversion of double bonds to oxirane is high provided a significant excess of the perbenzoic acid is used. The conversion was monitored using NMR spectroscopy. The unsaturated oxazoline was reacted with an acid-functional acrylic, and the resulting adduct was reacted with m-chloroperbenzoic acid to epoxidize the pendent unsaturation. Again, a significant excess of the peracid was required to reach high conversion of the double bonds. The epoxidized oxazoline and the modified acrylic were evaluated in thermoset coatings over metal panels. The properties of the films ranged from moderate to good depending on what species was used as a crosslinker. DOI : 10.1007/s11998-007-9040-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-007-9040-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3621
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 5, N° 1 (03/2008) . - p. 107-111[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 009979 - Périodique Bibliothèque principale Documentaires Disponible Epoxy Nucleophile catalyzed transesterification / Gary P. Craun in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 67, N° 841 (02/1995)
[article]
Titre : Epoxy Nucleophile catalyzed transesterification Type de document : texte imprimé Auteurs : Gary P. Craun, Auteur Année de publication : 1995 Article en page(s) : p. 23-30 Note générale : Blibliogr. Langues : Américain (ame) Catégories : Catalyseurs
Cinétique chimique
Copolymères
Epoxydes
Esterification
Haut extrait sec
Polyacryliques
Polyesters
Réactions chimiques
Réticulation (polymérisation)
Revêtements poudre:Peinture poudreIndex. décimale : 667.9 Revêtements et enduits Résumé : Epoxy nucleophile catalyzed transesterification (ENCAT) is a new cure technology, which is particularly well-suited for coatings application. Acrylic and acrylic-polyester blends in high-solids paints self-cure with ENCAT under normal bake conditions to give an excellent balance of hardness, flexibility, and solvent resistance. Powder paints prepared with ester derivatives of epoxy resins self-cure, and likewise give an excellent balance of properties. The ENCAT catalyst is formed during cure by the combination of a nucleophile with an epoxide moiety. A strong base alkoxide, which is produced when the epoxide ring opens by nucleophilic attack, initiates transesterification. This mechanism is supported by 13C NMR and gas chromatographic studies. rate of transesterification is related to the structure of the hydroxyl and ester group undergoing transesterification. Transesterification rate is directly related to the concentrations of the nucleophile and epoxy co-catalysts, as well as to the basicity and nucleophilicity of the nucleophile Note de contenu : - EXPERIMENTAL : Model compound studies - Transesterification rate by gas chromatography - Polymer synthesis - Paint preparation and testing
- RESULTS AND DISCUSSION : Model compound studies
- TRANSESTERIFICATION RATE STUDIES : Evidence of transesterification by gas chromatography - Transesterification rate : nucleophile and epoxy co-catalyst effects - Transesterification rate : ester and hydroxyl structure effects - Paint propertiesPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18490
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 67, N° 841 (02/1995) . - p. 23-30[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 003488 - Périodique Bibliothèque principale Documentaires Disponible 003499 - Périodique Bibliothèque principale Documentaires Exclu du prêt Etude de la polymérisation du chlorure de vinyle en présence de catalyseurs Ziegler modifiés / Pierre Rocanière / 1968
Titre : Etude de la polymérisation du chlorure de vinyle en présence de catalyseurs Ziegler modifiés Type de document : texte imprimé Auteurs : Pierre Rocanière, Auteur Année de publication : 1968 Importance : 100 p. Présentation : ill. Format : 27 cm Note générale : Thèse chimie des polymères - Bibliogr. Langues : Français (fre) Catégories : Catalyseurs
Chlorure de vinyle
PolymérisationIndex. décimale : 547.84 Composés macromoléculaires et composés connexes. Polymères Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=2293 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 1283 TH/1968/ROC Thèse, mémoire, etc... Bibliothèque principale Documentaires Disponible Expanded applications and enhanced durability of alkyd coatings using high-performance catalysts / Joshua Halstead in COATINGS TECH, Vol. 20, N° 3 (05-06/2023)
[article]
Titre : Expanded applications and enhanced durability of alkyd coatings using high-performance catalysts Type de document : texte imprimé Auteurs : Joshua Halstead, Auteur Année de publication : 2023 Article en page(s) : p. 42-55 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Catalyseurs
Cobalt
Essai de dureté
Essais accélérés (technologie)
Essais de résilience
Formulation (Génie chimique)
Nettoyabilité
Polyacryliques
Polyalkydes
Réticulants
Revêtements -- Analyse
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Alkyd-based coatings cure via both physical and chemical drying processes. The natural drying time of an alkyd can be weeks to months, which is not desirable from a practical point of view. In practice, the chemical crosslinking process is accelerated using catalysts, commonly referred to as driers. Generally, these are transition metal complexes with organic ligands. The most widely known and commonly used driers are based on cobalt carboxylates. While cobalt driers lead to highly crosslinked hard films, cobalt-based siccatives have recently faced reclassification as class 1b carcinogens by the Cobalt REACH consortium,1 a nonprofit group tasked with preparing the registration dossiers for cobalt and cobalt compounds. As a carcinogen, cobalt that is used to cure coatings and inks can be a risk to human health as humans can be in frequent contact with these substances (especially when applying paints or scraping off old paint layers). Many regions recognize that the use of cobalt in this industry must be reduced as part of a movement toward a sustainable future. Note de contenu : - Dry times - Hardness testing
- Scrub testing
- Washability testing
- Blocking test
- Corrosion testing
- Accelerated weathering
- GC/MS
- FTIR testing
- Table 1 : Resins used in trim paint formulations
- Table 2 : Optimized high-performance catalyst (HPC) formulations
- Table 3 : Optimized cobalt and acrylic formulations
- Table 4 : Dry times in hours for evaluated systems
- Table 5 : König hardness results conducted in standard conditions (23 °C and 50% relative humidity)
- Table 6 : Numerical washability results, ΔE
- Table 7 : b* Values after 336 hours QUV exposure
- Table 8 : 60° Gloss values after 336 hours QUV exposure
- Table 9 : Resin 1 emissions
- Table 10 : Resin 3 emissions
- Fig. 1 : Bispidon structure, dimethyl 3-methyl-9-oxo-2,4-di(pyridin-2-yl)-7-(pyridin-2-ylmethyl)-3,7-diazabicyclo[3.3.1]nonane-1,5-dicarboxylate
- Fig. 12 : Model representation of the oxidative drying pathway for an alkyd polymerEn ligne : https://drive.google.com/file/d/1gFjt6qr92gc3vNXmESc0PkQWTtFaO9Jx/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39424
in COATINGS TECH > Vol. 20, N° 3 (05-06/2023) . - p. 42-55[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24067 - Périodique Bibliothèque principale Documentaires Disponible Facile fabrication of functional cellulose paper with high-capacity immobilization of Ag nanoparticles for catalytic applications for tannery wastewater / Ruiquan Yu in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 2 (Année 2020)
[article]
Titre : Facile fabrication of functional cellulose paper with high-capacity immobilization of Ag nanoparticles for catalytic applications for tannery wastewater Type de document : texte imprimé Auteurs : Ruiquan Yu, Auteur ; Tianxiang Lan, Auteur ; Jing Jiang, Auteur ; Hao Peng, Auteur ; Ruifeng Liang, Auteur ; Gongyan Liu, Auteur Année de publication : 2020 Article en page(s) : 11 p. Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Argent
Catalyseurs
CelluloseLa cellulose est un glucide constitué d'une chaîne linéaire de molécules de D-Glucose (entre 200 et 14 000) et principal constituant des végétaux et en particulier de la paroi de leurs cellules.
Eaux usées
Nanoparticules
Papier
Tannage -- DéchetsIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : It has been a research goal to develop macroscopic materials with an optimized surface structure to affix silver nanoparticles which could contaminate water and maximize their practical functions. Cellulose paper is a versatile biomass material valued for its abundance, low cost, biocompatibility, and natural composition. Until now, its potential application in water purification has not been adequately explored. In this study, gallic acid-modified silver nanoparticles (GA@AgNPs) were loaded onto commercial cellulose filter paper using a simple lipoic acid modification process (GA@AgNPs-LA-CP). Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD) were used to characterize the GA@AgNPs-LA-CP. The catalytic activity of the GA@AgNPs-LA-CP was evaluated by the reduction reaction of methylene blue (MB), Rhodamine B (RhB), and 4-nitrophenol (4-NP) with sodium borohydride (NaBH4). The GA@AgNPs-LA-CP exhibited excellent catalytic activity toward MB, RhB, and 4-NP, taking advantage of its high specific surface area generated by the cellulose fiber network structure. Interestingly, due to the electrostatic interactions between the cationic dyes and the GA@AgNPs, the as-prepared catalytic composite material serves as a better catalyst for MB and RhB, suggesting dual applications of the composite materials for organic wastewater treatment and the removal of harmful dyes. This implies that the immobilization of AgNPs on cellulose papers is an effective method and can be applied to efficient wastewater treatment applications. Note de contenu : - EXPERIMENTAL SECTION : Materials - Preparation of lipoic acid-modified cellulose paper (LA-CP) - Preparation of GA@AgNPs immobilized cellulose paper by lipoic acid modification (GA@AgNPs-LA-CP) - Characterizations - Measurement of Ag content on GA@AgNPs-LA-CP - Catalytic reduction of 4-NP, MB and RhB
- RESULTS AND DISCUSSION : Preparation and characterization of GA@AgNPs-LA-CP
- CATALYTIC PROPERTIES OF GA@AgNPs-LA-CPDOI : https://doi.org/10.1186/s42825-020-00019-y En ligne : https://link.springer.com/content/pdf/10.1186/s42825-020-00019-y.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37330
in JOURNAL OF LEATHER SCIENCE AND ENGINEERING > Vol. 2 (Année 2020) . - 11 p.[article]Fast systems for lighter automobiles / Michael Henningsen in KUNSTSTOFFE INTERNATIONAL, Vol. 101, N° 9 (09/2011)
PermalinkPermalinkFunctional cellulose fibers via polycarboxylic acid/carbon nanotube composite coating / Farbod Alimohammadi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 1 (01/2013)
PermalinkGreen chemistry for low VOC and waste management / Shradha Krishna Pednekar in PAINTINDIA, Vol. LXVII, N° 4 (04/2017)
PermalinkHigh-Solids coatings using benzylanilinium sulfonates-II a,a-dimethylbenzylpyridinium p-toluenesulfonate, an effective blocked sulfonic acid / S. Nakano in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 68, N° 859 (08/1996)
PermalinkHighly functional biobased polyols and their use in melamine–formaldehyde coatings / Thomas J. Nelson in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 6 (11/2013)
PermalinkHow to achieve faster dry times and more with high-performance catalysts in low-VOC alkyd coatings / Allison Abbey in COATINGS TECH, Vol. 19, N° 1 (01/2022)
PermalinkInfluence of acidic catalysts on epoxidation of soybean oil using per acid formed in-situ / V. K. Tyagi in PAINTINDIA, Vol. LVIII, N° 3 (03/2008)
PermalinkLow-temperature bleaching of cotton fabric with a binuclear manganese complex of 1,4,7-trimethyl-1,4,7-triazacyclononane as catalyst for hydrogen peroxide / Xinbo Qin in COLORATION TECHNOLOGY, Vol. 128, N° 5 (2012)
PermalinkLes nanofibres de carbone : un support de catalyseur polyvalent / Ricardo Vieira in L'ACTUALITE CHIMIQUE, N° 329 (04/2009)
PermalinkNatural sunlight assisted bentonite-ZnO mixed oxide catalyst for organic pollutant removal in leather post tanning wastewater with solar reactor / E. T. Deva Kumar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 8 (08/2018)
PermalinkNovel metal-free catalysts for epoxy carboxy coatings / Ravi Ravichandran in COATINGS TECH, Vol. 16, N° 3 (03/2019)
PermalinkOxazoline-based crosslinking reaction for coatings / Philipp Knospe in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 5 (09/2021)
PermalinkPhysico-chimie des tamis moléculaires hydratés : étude combinée expérience/théorie / Guillaume Poulet in L'ACTUALITE CHIMIQUE, N° 282 (01/2005)
PermalinkPickering interfacial catalysis for organic synthesis : a hotbed for innovation / Bing Hong in L'ACTUALITE CHIMIQUE, N° 434 (11/2018)
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