Low energy UV-A radiation curable refinish primers and clearcoats / Ramesh Subramanian in COATINGS TECH, Vol. 2, N° 15 (04/2005)  

[article]  inCOATINGS TECH > Vol. 2, N° 15 (04/2005) . - p. 38-41 Titre : Low energy UV-A radiation curable refinish primers and clearcoats Type de document : texte imprimé Auteurs : Ramesh Subramanian, Auteur ; Michael Dvorchak, Auteur ; Charles Gambino, Auteur ; Katherine Ratliff, Auteur Année de publication : 2005 Article en page(s) : p. 38-41 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 667.9 Revêtements et enduits Résumé : In recent years, the major emphasis in the coatings industry has been adapting to environmentally friendly technology that has all the key performance attributes of traditional solventborne systems. Lately, automotive OEMs have suggested the use of “greener coatings technologies” for the “end of line” repair and body-shop refinish applications. This “market pull” effect has rejuvenated interest among innovative resin manufacturers to bring novel concepts into this field. One such approach is the use of Ultraviolet-A (UVA) radiation-curable raw materials for primers and clearcoats. Various aliphatic urethane acrylates were screened for the right combination of coatings properties using high throughput screening. The few predicted formulations were subjected to rigorous performance tests to identify combinations that have fast dry time, adhesion, and sanding characteristics. The details of the formulations, evaluation methods, and the coatings properties will be presented. En ligne : https://drive.google.com/file/d/1lMesla9NmcsiK2xqxFe8nO7VLPhP0IjV/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5515 [article]

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UV-curable polyurethane / C. Todd Williams in COATINGS TECH, Vol. 9, N° 5 (05/2012)  

[article]  inCOATINGS TECH > Vol. 9, N° 5 (05/2012) . - p. 28-32 Titre : UV-curable polyurethane : Dispersions for aerospace topcoat applications Type de document : texte imprimé Auteurs : C. Todd Williams, Auteur ; Katrina Callen, Auteur ; Michael Dvorchak, Auteur Année de publication : 2012 Article en page(s) : p. 28-32 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Avions -- Revêtements:Avions -- Peinture Dispersions et suspensions Polymères en émulsion Polyuréthanes Revêtements -- Séchage sous rayonnement ultraviolet Index. décimale : 667.9 Revêtements et enduits Résumé : Coating application is the rate determining step in aircraft production. Currently, aerospace coatings utilize two-component polyurethane chemistry that requires 72 hours curing time before the plane can be returned to service. UV-curable polyurethane dispersions (UV-PUDs) were evaluated as aerospace topcoats to allow for increased productivity as a result of decreased curing time. UV-PUD based coatings were formulated and evaluated for their ability to meet military topcoat specification MIL-PRF-85285D. Coatings that meet this specification require a balance of chemical and water resistance, flexibility, weatherability, and aesthetics. This article will focus on the performance of UV-PUD coating formulations with respect to these properties. En ligne : https://drive.google.com/file/d/1lxkZLBOla5hE3kb8ORwwB2k8D1sVQ1t3/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15111 [article]

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UV-A curable polyurethane dispersions in wood coatings : Reducing the hurdle of inventment costs in UV equipment / Robert A. Wade in COATINGS TECH, Vol. 2, N° 14 (03/2005)  

[article]  inCOATINGS TECH > Vol. 2, N° 14 (03/2005) . - p. 42-46 Titre : UV-A curable polyurethane dispersions in wood coatings : Reducing the hurdle of inventment costs in UV equipment Type de document : texte imprimé Auteurs : Robert A. Wade, Auteur ; Michael Dvorchak, Auteur ; Christoph Irle, Auteur Année de publication : 2005 Article en page(s) : p. 42-46 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 667.9 Revêtements et enduits Résumé : Radiation curable coatings have been used in the wood coatings industry for several years. Major benefits of radiation cure are the high curing speed and high crosslink density. High performance coatings with extremely low VOC/VHAPS, excellent abrasion, as well as chemical resistance, are obtained. When complex substrates must be coated there is always the concern of uncured surfaces in shadow areas. Typically, more expensive UV equipment that optimizes a homogeneous radiation exposure is necessary, which requires higher capital investment. This has been seen for years as the largest hurdle for the industrial coater. A new waterborne coatings system based on UV-PUDs can be cured with low energy UV-A lights, without sacrifice of performance properties for wood coatings applications. These types of lamps are significantly cheaper in their investment costs as well as in their maintenance. In this article, coatings performances are discussed with special respect to low intensity UV-A lamps, UV-curing PUDs, and the effect of adding self-crosslinking dispersions. The effects of adding water-dispersible polyisocyanates and carbodiimide crosslinkers to such coatings are also be presented. En ligne : https://drive.google.com/file/d/1YaHRg6gLOSQGLC1B-BcopGuwW7UH6wlR/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5520 [article]

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