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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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Cationic UV-curable formulations containing hydroxy functional fluoropolymer resins / Gerry K. Noren 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. 53-59 Titre : Cationic UV-curable formulations containing hydroxy functional fluoropolymer resins Type de document : texte imprimé Auteurs : Gerry K. Noren, Auteur Année de publication : 2000 Article en page(s) : P. 53-59 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 667.9 Revêtements et enduits Résumé : A 12-experiment Plackett-Burman screening design was used to evaluate two hydroxy functional fluorocarbon resins as components for cycloaliphatic epoxy-based cationic UV-curable formulations. The effects of six formulation variables were studied: fluoropolymer resin type, ratio of fluoropolymer resin to cycloaliphatic epoxy resin, anion of the photoinitiator, structure of the cycloaliphatic epoxy resin, photoinitiator level, and use of a thermal post cure. Physical properties (tensile strength, elongation, modulus, glass transition temperature (Tg), equilibrium modulus), yellowing after QUV exposure, water sensitivity, and coefficient of friction values for the 12 formulations were measured. The relationships between the formulation variables and the coating/film properties are discussed. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5801 [article]

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Influence of coating formulation variables and processing on the adhesion of melamine - crosslinked polyester primer to urethane - crosslinked epoxy electrocoat / Larry P. Haack 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. 61-65 Titre : Influence of coating formulation variables and processing on the adhesion of melamine - crosslinked polyester primer to urethane - crosslinked epoxy electrocoat Type de document : texte imprimé Auteurs : Larry P. Haack, Auteur ; Joseph W. Holubka, Auteur Année de publication : 2000 Article en page(s) : p. 61-65 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 667.9 Revêtements et enduits Résumé : The role of spray-primer formulation chemistry towards robustness of adhesion to an epoxy-based electrocoat was examined for a range of coatings representative of those used in automotive OEM applications. For coatings exhibiting degraded adhesion performance, high-resolution X-ray photoelectron spectroscopy (XPS) identified the presence of a surface-active polyether-based anti-cratering agent (ACA) formulated into the epoxy-based electrocoat at the primer/electrocoat interface. The adhesion performance of the better-performing systems was found to be related to the spray-primer’s ability to accommodate the ACA by either absorbing or displacing it from the electrocoat surface, thus diluting it to concentrations no longer adversely affecting adhesion. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5802 [article]

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Formulating water - based systems with propylene - oxide - based glycol ethers / Carmen Rodriguez 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. 67-72 Titre : Formulating water - based systems with propylene - oxide - based glycol ethers Type de document : texte imprimé Auteurs : Carmen Rodriguez, Auteur ; Julia Weathers, Auteur ; Bernadette Corujo, Auteur ; Patricia Peterson, Auteur Année de publication : 2000 Article en page(s) : p. 67-72 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 667.9 Revêtements et enduits Résumé : To comply with environmental regulations, formulators have reformulated to water-based systems using non-hazardous air pollutants (non-HAP) cosolvents and developed new resin technology. In fully formulated water-based systems, however, changing the solvent system to meet environmental regulations has wide ranging effects on viscosity, surface defects, film shrinkage, adhesion, and durability. Formulators often adjust paint viscosity by balancing the levels of cosolvents, surfactants, and rheology modifiers. Reformulating with non-HAPs solvents such as propylene oxide-based glycol ethers (PG-glycol ethers) helps reduce volatile organic content (VOC) to meet environmental compliance and eliminates HAPs reporting requirements. When replacing ethylene oxide-based glycol ethers (EG-glycol ethers) with their PG-glycol ethers, reformulation seems simple enough, particularly if evaporation rates and solubility parameters are matched. A drop-in replacement, however, requires optimization. This study compares the use of PG-glycol ethers in four architectural latex paints and assesses their effects on rheology, drying, and some key performance attributes. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5803 [article]

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Pratical example of a coating process quality improvement through designed experiments / B. Scibilia 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. 73-79 Titre : Pratical example of a coating process quality improvement through designed experiments Type de document : texte imprimé Auteurs : B. Scibilia, Auteur ; A. Barreau, Auteur ; R. Chassagnon, Auteur ; A. Kobi, Auteur Année de publication : 2000 Article en page(s) : p. 73-79 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 667.9 Revêtements et enduits Résumé : The objective of this paper is to show how coatings quality improvements may be achieved using experimental design. Designed experiments are an empirical approach to solving quality-related problems. We present a successfully designed experiment for improving the performance of a laminated fiber board coating process. The objective was to eliminate the aesthetic defects that sometimes appeared on the surface ofdecorative laminated fiber boards. Eleven parameters were tested for significance. A 32-run designed experiment was employed. Live tests were performed to identify the factor settings (the set points at which a factor is placed during the designed experiment) that allowed the elimination of nearly all visual defects. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5804 [article]

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