Low voc, low viscosity uv cationic radiation-cured ink-jet ink system / H. Zhang in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 72, N° 905 (06/2000)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 72, N° 905 (06/2000) . - p. 45-52 Titre : Low voc, low viscosity uv cationic radiation-cured ink-jet ink system Type de document : texte imprimé Auteurs : H. Zhang, Auteur ; J. T. K. Woo, Auteur ; John L. Massingill, Auteur Année de publication : 2000 Article en page(s) : p. 45-52 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 667.9 Revêtements et enduits Résumé : Ink-jet inks need to be very low in viscosity to transport the ink through the jet nozzle as well as for drop formation and integrity. The objective of this project was to demonstrate UV-cured systems for ink-jet inks and coatings with zero volatile organic compounds and very low viscosity. Cycloaliphatic epoxy systems were selected as binders of choice for this project due to their low viscosity and ability to be cured using UV-cationic photoinitiators. UV-curable coatings and inks with zero VOC and less than 10 cPs viscosities were formulated using exempt solvent acetone and vinyl cyclohexene diepoxide. UV-curable inks with up to 10% black dye were formulated. Rapid cure was achieved through the use of aryl sulfonium salts of hexafluorophosphoric acid. The presence of dye inhibited the reaction, but adequate cure of dyed formulations was achieved by increasing the concentration of the photoinitiator. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5800 [article]

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Zero VOC sunlight curable coatings / Huilei Zhang in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 72, N° 903 (04/2000)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 72, N° 903 (04/2000) . - p. 77-79 Titre : Zero VOC sunlight curable coatings Type de document : texte imprimé Auteurs : Huilei Zhang, Auteur ; John L. Massingill, Auteur ; J. T. K. Woo, Auteur Année de publication : 2000 Article en page(s) : p. 77-79 Note générale : Bibliogr. Langues : Américain (ame) Tags : Matériau  revêtement  Peinture  photodurcissable  Epoxyde  résine  Durcissement  Rayonnement  UV  Lumière  solaire  Etude  expérimentale Index. décimale : 667.9 Revêtements et enduits Résumé : Curing of one-pack epoxy coatings by exposure to visible light for a few hours would be a useful innovation for architectural, industrial, and maintenance (AIM) coatings as well as for any large objects that would be difficult to heat but easy to shine a light on. Zero VOC, low viscosity, sunlight curable clearcoats can be formulated with cycloaliphatic epoxy compounds as well as aromatio glycidyl ethers. Cure is achieved with a cationic photoinitiator that generates a strong acid when exposed to sunlight for a couple of hours. The clearcoats had good hardness, adhesion, and solvent resistance. No cure was achieved with incandescent light or with fluorescent light, which contains only 0.1% UV light as compared to sunlight that has 5% UV light. This work indicates that zero VOC one pack clearcoat epoxy formulations for AIM applications and large objects could be cured by light racks that generate the spectrum of sunlight. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5819 [article]

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