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Scratch resistance of UV-cured acrylic clearcoats / I. Lorinczova in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 89, B2 (06/2006)
[article]
Titre : Scratch resistance of UV-cured acrylic clearcoats Type de document : texte imprimé Auteurs : I. Lorinczova, Auteur ; C. Decker, Auteur Année de publication : 2006 Article en page(s) : p. 133-143 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Photoréticulation
Polyacryliques
Rayures
Résistance à l'abrasion
Vernis -- Séchage sous rayonnement ultravioletIndex. décimale : 667.9 Revêtements et enduits Résumé : The scratch and mar resistance of UV-cured acrylic clear coats was evaluated by means of the Taber scratch and Scotch-Brite tests. The influence of the chemical structure of the acrylate oligomer, of the photoinitiator and of the UV dose on the scratch resistance of various UV-cured coatings was evaluated quantitatively. No direct correlation could be found between the scratch resistance and the hardness of the UV-cured polymer. The scratch resistance was evaluated through measurements of the ductile/brittle transition and was significantly enhanced by the addition of a siloxane slip agent and of acrylated silica nanoparticles. A self-healing process of ductile scratches was shown to occur in most of these coatings upon storage at ambient temperatures or upon moderate heating. Note de contenu : - Definitions and evaluation of the mar and scratch resistance
- Experimental
- Results and discussion : Influence of the UV dose - Hardness - scratch resistance correlation - Influence of the substrate and the film thickness - Influence of additives - Influence of storage and temperature - Healing processDOI : 10.1007/BF02699643 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699643.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5384
in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 89, B2 (06/2006) . - p. 133-143[article]Réservation
Réserver ce documentUV-radiation curing of waterborne acrylate coatings / C. Decker in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 1, N° 4 (10/2004)
[article]
Titre : UV-radiation curing of waterborne acrylate coatings Type de document : texte imprimé Auteurs : C. Decker, Auteur ; I. Lorinczova, Auteur Année de publication : 2004 Article en page(s) : p. 247-256 Note générale : Bibliogr. Langues : Américain (ame) Tags : Propriété mécanique Etude expérimentale Résistance intempérie Dureté Photoamorceur Relation mise en oeuvre propriété Cinétique Composé polyfonctionnel Polymérisation masse photochimique Matériau revêtement Acrylate polymère Index. décimale : 667.9 Revêtements et enduits Résumé : A kinetic study of the ultrafast curing of water-based acrylate resins upon UV irradiation was conducted by means of infrared spectroscopy. Under intense illumination, the crosslinking polymerization was found to occur in the dried film within less than one second to generate a totally insoluble polymer. The influence of a number of critical factors on the polymerization rate and cure extent has been investigated, namely the type of photoinitiator, the chemical structure of the acrylate functionalized oligomer, and the sample temperature. Coatings obtained from emulsions undergo a faster and more extensive polymerization than coatings obtained from dispersions, because of a greater molecular mobility in the soft low-modulus polymer formed. Very hard coatings were produced by the UV curing of dispersion-type acrylate resins, especially when the UV irradiation was performed at 80°C on the sample emerging from the drying oven. Tg values up to 120°C were reached when such resins were UV-cured at ambient temperature as 1-mm thick plates, because of the large amount of heat released during such ultrafast polymerization. UV-cured coatings made of aliphatic polyurethane-acrylates proved to be very resistant to accelerated weathering in the presence of adequate light stabilizers. DOI : 10.1007/s11998-004-0027-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-004-0027-x.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3856
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 1, N° 4 (10/2004) . - p. 247-256[article]Réservation
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