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Catalysis of the epoxy-carboxyl reaction / Werner J. Blank in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 74, N° 926 (03/2002)
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Titre : Catalysis of the epoxy-carboxyl reaction Type de document : texte imprimé Auteurs : Werner J. Blank, Auteur ; Marie E. Picci, Auteur Année de publication : 2002 Article en page(s) : p. 33-41 Note générale : Bibliogr. Langues : Américain (ame) Tags : 'Etude expérimentale' 'Mécanisme réaction' 'Activité catalytique' comparative' 'Catalyse basique' 'Réaction 'Durcissement matière plastique' 'Acrylate copolymère' 'Méthacrylate 'Résine époxyde' Index. décimale : 667.9 Revêtements et enduits Résumé : We have investigated the reactions of glycidyl ether, glycidyl ester, and other oxirane functional resins with carboxyl or anhydride functional compounds and polymers in the presence of a wide range of amine, phosphonium, and metal catalysts.
We confirmed that both amine and phosphonium compounds can catalyze the reaction of epoxy groups with carboxyl and anhydride groups. There are certain deficiencies with these catalysts, such as a tendency to yellow and a reduction in stability at ambient or elevated temperatures. We also observed that many of the known amine catalysts contribute to poorer humidity resistance and exterior durability. Several metal salts were found to be effective catalysts, but they also contributed to a reduction in chemical resistance or they led to paint instability.
We have discovered a group of metal chelates that overcome these problems and provide stable formulations in a single package that do not yellow during cure and that give improved resistance properties. The new catalysts have been evaluated in high-solids epoxy/carboxyl coatings, automotive clearcoats, and powder coatings.Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5670
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 74, N° 926 (03/2002) . - p. 33-41[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001236 - Périodique Bibliothèque principale Documentaires Disponible 001237 - Périodique Bibliothèque principale Documentaires Disponible Infrared spectroscopic investigation of curing of bisphenol - A liquid epoxy with diamino diphenyl methane adduct in surface coating compositions / V. M. Natu in SURFACE COATINGS INTERNATIONAL, Vol. 78, N° 3 (03/1995)
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Titre : Infrared spectroscopic investigation of curing of bisphenol - A liquid epoxy with diamino diphenyl methane adduct in surface coating compositions Type de document : texte imprimé Auteurs : V. M. Natu, Auteur ; S. R. Lobo, Auteur ; A. V. Rao, Auteur Année de publication : 1995 Article en page(s) : p. 104-105 Note générale : Bibliogr. Langues : Anglais (eng) Tags : Peinture Liant 'Epoxyde résine' 'Bisphénol A' 'Composé addition' 'Durcissement (matière plastique)' 'Etude expérimentale' 'Spectrométrie IR' 'Diphénylméthane(diamino)' Index. décimale : 667.9 Revêtements et enduits Résumé : Characterisation of coatings and processes occurring during their curing have a broad significance in material research. the final properties of the coating depend on the chemical reactions taking place during the film formation. Several studies on curing of the coatings by IR spectroscopy have been reported in the literature. However, the optimization of curing composition by IR spectroscopy for achieving desired coating performance is not discussed in detail. In the present paper, the optimization of curing composition of bisphenol-A liquid epoxy and an amine adduct by IR spectroscopy is reported along with the coating performance. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16925
in SURFACE COATINGS INTERNATIONAL > Vol. 78, N° 3 (03/1995) . - p. 104-105[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006560 - Périodique Bibliothèque principale Documentaires Disponible Innovative epoxy prepregs using bio-based curing agents / Daniele d'Amico in JEC COMPOSITES MAGAZINE, N° 63 (03/2011)
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Titre : Innovative epoxy prepregs using bio-based curing agents Type de document : texte imprimé Auteurs : Daniele d'Amico, Auteur ; Franco Innocente, Auteur Année de publication : 2011 Article en page(s) : p. 87-90 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Cardanol dérivé' Phénoplaste Adhésif 'Fibre minérale' 'Etude expérimentale' Amine 'Propriété mécanique' rhéologique' 'Effet concentration' 'Origine végétale' Novolaque 'Durcissement (matière plastique)' Stratifié'Epoxyde résine' 'Matériau composite' fibre unidirectionnelle' renforcé fibre' carbone' Durcissant Préimprégné Index. décimale : 668.4 Plastiques, vinyles Résumé : Technologycom S.r.l. and Cimteclab S.p.A. have developed an innovative epoxy prepreg using a cardanol derivative as curing agent. Two different cardanol-based epoxy systems were studied by DSC. The system showing the highest Tg was chosen for the manufacture of a UD carbon fibre prepreg by the hot melt process. Preliminary rheological measurements were performed to find the correct process parameters. Finally, the properties of cardanol-based resins and composites were compared with those of systems based on traditional amines. Note de contenu : - EXPERIMENTAL : Materials
- MEASUREMENTS : DSC analysis - Rheological measurements - Izod impact testing - Mechanical testing
- RESULTS AND DISCUSSION : PREMIMINARY MATRIX CHARACTERIZATION : DSC analysis - Rheological measurements - Izod impact test - Prepreg manufacture - Results of the mechanical tests on the composite laminatePermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13770
in JEC COMPOSITES MAGAZINE > N° 63 (03/2011) . - p. 87-90[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 013161 - Périodique Bibliothèque principale Documentaires Disponible Making cure visible : monitoring the cross-linking process using integrated ultrasound sensors / Wolfgang Stark in JEC COMPOSITES MAGAZINE, N° 38 (01-02/2008)
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Titre : Making cure visible : monitoring the cross-linking process using integrated ultrasound sensors Type de document : texte imprimé Auteurs : Wolfgang Stark, Auteur ; Juergen Bartusch, Auteur ; Joachim Doering, Auteur ; Jarlath McHugh, Auteur Année de publication : 2008 Article en page(s) : p. 64-66 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Etude expérimentale' 'Appareil mesure' 'Moulage transfert' 'Matériau renforcé fibre' composite' 'Polymère insaturé' Polyester Epoxy 'Méthode ultrasonore' Cinétique 'Durcissement (matière plastique)' Monitorage Index. décimale : 668.4 Plastiques, vinyles Résumé : A special ultrasonic measuring system was developed to monitor the cross-linking process, enabling interaction with the manufacturing process in order to optimise part quality and reduce cycle times. Note de contenu : - Cross-linking of thermosetting materials
- Ultrasound measuring technique
- Qualification of US technique
- Implementation of ultrasound cure monitoring into the manufacturing processPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=14065
in JEC COMPOSITES MAGAZINE > N° 38 (01-02/2008) . - p. 64-66[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 009643 - Périodique Bibliothèque principale Documentaires Disponible Positive pressure repairs without an autoclave / Tom Lane in JEC COMPOSITES MAGAZINE, N° 53 (11-12/2009)
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Titre : Positive pressure repairs without an autoclave Type de document : texte imprimé Auteurs : Tom Lane, Auteur Année de publication : 2009 Article en page(s) : p. 54-56 Langues : Anglais (eng) Tags : 'Equipement mis en oeuvre' 'Chauffage localisé' 'Récipient sous pression' 'Durcissement (matière plastique)' 'Matériau renforcé fibre' Thermodurcissable Stratifié Endommagement composite' Réparation Index. décimale : 668.4 Plastiques, vinyles Résumé : Autoclaves are used to manufacture most of the composite structures found in today's aircraft. Repairing such structures in an autoclave is both time-consuming and expensive. To address this issue, Heatcon® Composite Systems developed a system that uses only localized heat and shop air to effect the repair. Note de contenu : - Looking for an alternative to the autoclave
- Localized heating
- An easy-to-use, customizable solutionPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=14245
in JEC COMPOSITES MAGAZINE > N° 53 (11-12/2009) . - p. 54-56[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012079 - Périodique Bibliothèque principale Documentaires Disponible Resin flow monitoring in the composite infusion process in JEC COMPOSITES MAGAZINE, N° 40 (05/2008)
PermalinkSeamless modelling paste for automated production of large plugs and models in JEC COMPOSITES MAGAZINE, N° 43 (09/2008)
PermalinkThickener addition and the morphology of UPE/PVAc blends / M. Montagne in JEC COMPOSITES MAGAZINE, N° 34 (07-08/2007)
PermalinkTransparent UV curable fluorinated coatings / David Szum in EUROPEAN COATINGS JOURNAL (ECJ), N° 9/95 (09/1995)
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