Influence of some vegetable oils on the photocrosslinking of coatings based on an o-cresol novolac epoxy resin and a bis-cycloaliphatic diepoxide / Le Xuan Hien in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 8, N° 3 (05/2011)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 8, N° 3 (05/2011) . - p. 343-353 Titre : Influence of some vegetable oils on the photocrosslinking of coatings based on an o-cresol novolac epoxy resin and a bis-cycloaliphatic diepoxide Type de document : texte imprimé Auteurs : Le Xuan Hien, Auteur ; Do Thi Ngoc Minh, Auteur ; Trieu Nguyen Thi Viet, Auteur ; Christian Decker, Auteur Année de publication : 2011 Article en page(s) : p. 343-353 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cinétique chimique Epoxydes Huiles et graisses végétales Résines photoréticulables Réticulation (polymérisation) Revêtements Index. décimale : 667.9 Revêtements et enduits Résumé : The influence of cashew nut shell oil (CNO), epoxidized soybean oil (ESO), castor oil (CO), and dioctyl phtalate (DOP) on the photocrosslinking kinetics of UV curable mixtures containing an o-cresol novolac epoxy resin (CNE), a bis-cycloaliphatic diepoxide monomer (BCDE), and a triarylsulfonium salt (TAS) as a cationic photoinitiator has been studied. The formulation with a weight ratio CNE/BCDE/TAS of 60/40/5 was found to have the highest cure rate and the greatest final conversion of epoxy groups upon UV exposure. The presence of an unsaturated oil or of DOP in the UV curable formulation, at a content ranging from 0.07 to 0.79 mol/kg, was shown to increase the initial polymerization rate of the epoxy groups from 12 up to 31 mol/kg s, and the epoxy conversion after 18 s UV exposure from 80 up to 95%. It was found that the UV cured coatings containing CNO or DOP at concentrations between 0.3 and 0.6 mol/kg and ESO at concentrations between 0.12 and 0.19 mol/kg exhibit the best performance. These results were explained by a number of competitive factors, mainly the effects of the chemical structure and content of the oils and of DOP on the polarity, viscosity, compatibility, and internal filter effect of the UV curable resins, as well as by the characteristics of the tridimensional polymer networks formed upon UV exposure. The materials produced under the optimal conditions determined in this study can be used as high performance decorative and protective coatings and also as adhesives in different sectors of applications. Note de contenu : - EXPERIMENTAL : Materials - Samples preparation - Irradiation - Analysis (IR analysis - Determination of the gel fraction and of the swelling degree - Determination of the viscosity - Determination of the physico-mechanical properties - Thermogravimetric). - RESULTS AND DISCUSSION : Kinetic study (mechanism of the photoinitiated cationic polymerization - UV curing of the systems without plasticiser - UV curing of the systems containing plasticizer) - Properties of UV-cured coatings (without plasticiser - With plasticizers). DOI : 10.1007/s11998-010-9303-0 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-010-9303-0.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11674 [article]

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Linked by light / Christian Decker in EUROPEAN COATINGS JOURNAL (ECJ), N° 7-8/2005 (07-08/2005)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 7-8/2005 (07-08/2005) . - p. 28-32 Titre : Linked by light : Advances in the UV-curing of organic coatings Type de document : texte imprimé Auteurs : Christian Decker, Auteur Année de publication : 2005 Article en page(s) : p. 28-32 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : Radiation curing - Radiation curing technology has a number of unique advantages in terms of its speed of cure, the absence of solvents, versatility and high performance in final applications. Recent developments in photoinitiators, monomer chemistry, the formation of various hybrid systems and the use of nanoparticles, all of which offer the promise of further advances in performance, are reviewed. En ligne : https://drive.google.com/file/d/1UUg3b5-62hPep5NlkYlzPAlP9Jc-a7zw/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8810 [article]

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Real-time UV cure monitoring / Khalid Zahouily in EUROPEAN COATINGS JOURNAL (ECJ), N° 11/03 (11/2003)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 11/03 (11/2003) . - p. 14-18 Titre : Real-time UV cure monitoring : Dielectic and infrared spectroscopy analyses show close linear correlation Type de document : texte imprimé Auteurs : Khalid Zahouily, Auteur ; Christian Decker, Auteur ; Erwin Kaisersberger, Auteur ; Michael Gruener, Auteur Année de publication : 2003 Article en page(s) : p. 14-18 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : The photopolymerization kinetics of UV curable coating systems have been studied by real-time infrared spectroscopy (RT-FTIR) and in situ dielectric analysis (DEA). It was possible to correlate the dielectric properties of the resins and the monomer conversion during irradiation linearly. By monitoring the changes in the electrical properties of the formulation, the UV polymerization rate and cure extent can thus be determined easily in real-time. Note de contenu : Experimental Data collection every 50 milliseconds Dielectric measurements allow to calculate the degree of cure Conclusion. En ligne : https://drive.google.com/file/d/1eh9zvCsb613RHfN8UOj3bmy7lVG_IXjh/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9498 [article]

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Solid metering for reactive PU systems / Christian Decker in KUNSTSTOFFE PLAST EUROPE, Vol. 95, N° 7/2005 (07/2005)

[article]  inKUNSTSTOFFE PLAST EUROPE > Vol. 95, N° 7/2005 (07/2005) . - p. 78-82 Titre : Solid metering for reactive PU systems Type de document : texte imprimé Auteurs : Christian Decker, Auteur ; Björn Dormann, Auteur Année de publication : 2005 Article en page(s) : p. 78-82 Langues : Anglais (eng) Index. décimale : 668.4 Plastiques, vinyles Résumé : Filled PU - A process already established in the textile field is increasingly gaining importance for the industrial manufacture of technical articles. A large selection of fillers extends the applications of the reactive processing of polyurethane and opens up scope for new product ideas. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7444 [article]

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