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Volcanic glass shards for matting the smoothest of wood clear coats / Emmanuelle Giraud in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 210, N° 4665 (11/2020)
[article]
Titre : Volcanic glass shards for matting the smoothest of wood clear coats Type de document : texte imprimé Auteurs : Emmanuelle Giraud, Auteur Année de publication : 2020 Article en page(s) : p. 40-41 Langues : Anglais (eng) Catégories : Agent mattant
Bois -- Revêtements protecteurs
Bois -- Vernis
Formulation (Génie chimique)
Perlite (roche)
Transparence (optique)Index. décimale : 667.9 Revêtements et enduits Résumé : The author discusses the benefits of using perlite in wood clear coats.
Matting in wood clear coats is generally achieved with aggregated synthetic silica. Due to highly porous cluster of particles of synthetic silica, in which the cluster diameter is typically 5-10µm, these materials provide matting at very low dosage. Matting efficiency of silica mainly depends on the particle volume concentration. A higher concentration increases the micro-roughness of the surface, leading to greater matting.
Perlite is an amorphous volcanic rock, which is formed by the rapid cooling of siliceous magma or lava. Perlite ore is a hydrated natural glass, containing typically about 72-75% of SiO2. The hydration occurs from absorption of near-surface water into the glass, resulting in 2-5% of bonded water within its structure. When heated rapidly to its softening temperature (approximately 900°C) the water molecules trapped in the rock evaporate and expand the particles from five to 30 times to their original volume. These expanded particles are actually groups of small rounded, light and insulating glass particles. Ground and milled perlite particels offer several different properties in paint and coatings, most notably : inertness ; hardness and matting.Note de contenu : - Formulations
- Matting and transparency principles
- Testing methods
- Fig. 1 : Scanning electron microscope picture of expanded milled perlite
- Fig. 2 : Transparency and matting at different concentrations of Clear Lite 6
- Fig. 3 : Transparency of Clear Lite 6 compared to synthetic coated silice
- Table 1 : Clear coat formulations
- Table 2 : Binder extension with ClearLite 6En ligne : https://drive.google.com/file/d/1Pnfas0apeu6YTIxOFeIhGgEvr2Xd2ego/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34830
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 210, N° 4665 (11/2020) . - p. 40-41[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22368 - Périodique Bibliothèque principale Documentaires Disponible Water-based system to prevent the yellowing of opaque coatings on knotted pine wood / Rodrigo Coniglio ; Wolfgang Gaschler ; Leonardo Clavijo in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 2 (03/2023)
[article]
Titre : Water-based system to prevent the yellowing of opaque coatings on knotted pine wood Type de document : texte imprimé Auteurs : Rodrigo Coniglio, Auteur ; Wolfgang Gaschler, Auteur ; Leonardo Clavijo, Auteur Année de publication : 2023 Article en page(s) : p. 781-788 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Bois -- Revêtements protecteurs
Décoloration
Essais accélérés (technologie)
Liants
Mesure
Opacité (optique)
Primaire (revêtement)
Résistance au jaunissement
Revêtements -- FinitionIndex. décimale : 667.9 Revêtements et enduits Résumé : Water-based opaque coatings used on pine wood show undesired discolorations related to the presence of knots which have an outstanding high concentration of extractives. These compounds, of both polar and nonpolar nature, migrate through the polymeric structure resulting in a yellow–brown spot over the knot. A water-based coating system comprising a polar primer and a nonpolar topcoat proved to have remarkable performance preventing the migration of the extractives and the discoloration of the painted surface. The knot bleeding resistance was tested following EN 927–7. The color of the coating over the knot was measured using CIELab coordinates, and the resulting color difference in comparison with the surrounding paint was in all cases less than the accepted limit for discoloration of opaque coatings. The need to have the combined system to successfully block the whole spectrum of extractives was proved by the evaluation of the individual coatings as well as the utilization of polar dispersions as topcoats. The system presented in this work constitutes a solution to the discoloration of water-based coatings over knotted pine wood. Note de contenu : - MATERIALS AND METHODS : Wood material - Coatings - Coating procedure - Artificial weathering procedure - Discoloration measurement
- RESULTS AND DISCUSSION : Performance of a nonpolar binder - Performance of a polar binder - Performance of a system of a polar primer and nonpolar topcoat - Performance of a system of a polar primer and polar topcoats
- Table 1 : Hansch parameter for the binders used in this work
- Table 2 : Exposure parameters according to EN ISO 4892–2:2006
- Table 3 : Discoloration results of the staining test on 20 boards painted with the binder A
- Table 4 : Maximum discoloration measured for boards painted with the binder B as pigmented coating
- Table 5 : Discoloration results of the staining test on 20 boards painted with the binder A as primer and the binder B as topcoat
- Table 6 : Detail of the systems used to test the performance of a polar primer and polar topcoat
- Table 7 : Maximum discoloration measured for boards painted with the systems with polar primer and polar topcoatsDOI : https://doi.org/10.1007/s11998-022-00723-w En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00723-w.pdf?pdf=button% [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39318
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 781-788[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24056 - Périodique Bibliothèque principale Documentaires Disponible A waterborne and environmentally benign, marine timber coating / Brian G. Dixon in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 66, N° 837 (10/1994)
[article]
Titre : A waterborne and environmentally benign, marine timber coating Type de document : texte imprimé Auteurs : Brian G. Dixon, Auteur ; Wendy Gomes, Auteur Année de publication : 1994 Article en page(s) : p. 21-25 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Amines Une amine est un composé organique dérivé de l'ammoniac dont certains hydrogènes ont été remplacés par un groupement carboné. Si l'un des carbones liés à l'atome d'azote fait partie d'un groupement carbonyle, la molécule appartient à la famille des amides. Découvertes en 1849, par Wurtz les amines furent initialement appelées alcaloïdes artificiels.
On parle d'amine primaire, secondaire ou tertiaire selon que l'on a un, deux ou trois hydrogènes substitués.
Par exemple, la triméthylamine est une amine tertiaire, de formule N(CH3)3.
Typiquement, les amines sont obtenues par alkylation d'amines de rang inférieur. En alkylant l'ammoniac, on obtient des amines primaires, qui peuvent être alkylées en amines secondaires puis amines tertiaires. L'alkylation de ces dernières permet d'obtenir des sels d'ammonium quaternaire.
D'autre méthodes existent : 1. Les amines primaires peuvent être obtenues par réduction d'un groupement azoture, 2. Les amines peuvent aussi être obtenues par la réduction d'un amide, à l'aide d'un hydrure, 3. L'amination réductrice permet l'obtention d'amines substituées à partir de composés carbonylés (aldéhydes ou cétones), 4. Les amines primaires peuvent être obtenues par la réaction de Gabriel.
Animaux marins
Bois -- Revêtements protecteurs
Environnement -- Protection
Epoxydes
Formulation (Génie chimique)
Marines (peinture)
Pollution -- Lutte contre
Réticulants
Revêtements antisalissures
Revêtements en phase aqueuse:Peinture en phase aqueuseIndex. décimale : 667.9 Revêtements et enduits Résumé : A novel waterborne coating system, which has significantly advanced the state of the art for protecting wooden structures from the ravages of marine borers, as well as fouling organisms in general, is discussed. The use of an innovative primer layer between the wood's surface and an overlaying protective polymer layer has imparted significantly improved resistance of coated wood samples to attack by wood boring organisms. The proposed technology is also attractive since it involves only environmentally compatible components and is easy to apply. Note de contenu : - RESEARCH OBJECTIVES
- EXPERIMENTAL : Wood, chitosan, and glutaraldehyde solutions - Epoxy formulations - Coating physical properties - Analytical
- RESULTS AND DISCUSSION : Wooden substrates, chitosan, and glutaraldehyde films - Epoxy formulations made using the amine curing agent - Waterborne epoxy formulations - Filled coatings - Ocean test protocol and biofouling resultsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18718
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 66, N° 837 (10/1994) . - p. 21-25[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 003471 - Périodique Bibliothèque principale Documentaires Disponible 003484 - Périodique Bibliothèque principale Documentaires Exclu du prêt Waterborne hybrid resin technology for exterior wood protection / Kimberly Gariepy in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 204, N° 4593 (02/2014)
[article]
Titre : Waterborne hybrid resin technology for exterior wood protection Type de document : texte imprimé Auteurs : Kimberly Gariepy, Auteur ; S. Halasz, Auteur ; L. Sterckx, Auteur ; G. Reidlinger, Auteur ; H. Billiani, Auteur ; J. Pierre, Auteur ; Guan Hoe Chua, Auteur Année de publication : 2014 Article en page(s) : p. 28-30 Langues : Anglais (eng) Catégories : Bois -- Revêtements protecteurs
Bois extérieurs
Liants
Polyalkydes
Résistance aux conditions climatiques
Revêtements en phase aqueuseIndex. décimale : 667.9 Revêtements et enduits Résumé : The popularity of wooden decks is increasing as greater numbers of people around the world not only become aware of the wide variety of wood species that are now available but also recognise the green aspects of wood as a renewable resource.
A wood deck, however, only creates a unique outdoor living space and brings value to a home if its beauty is maintained. Wooden decks are investments that require maintenance and these ongoing costs are often not considered. Yet, in many cases, the natural resistance of woods used today to weathering and insects are reduced due to the inability to allow the extensive ageing required to develop such properties. Therefore, the coating industry must step in and provide the needed protection.Note de contenu : - Importance of protection
- Limitations of conventional technology
- Advantages of hybrid resydrol binders
- Demonstrated performanceEn ligne : https://drive.google.com/file/d/1HOPXAgQYa8bJUrr4X7sHVDnschCfgHso/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20550
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 204, N° 4593 (02/2014) . - p. 28-30[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15989 - Périodique Bibliothèque principale Documentaires Disponible Waterborne resins for industrial wood coatings / Terri Carson in COATINGS TECH, Vol. 19, N° 5 (05-06/2022)
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Titre : Waterborne resins for industrial wood coatings Type de document : texte imprimé Auteurs : Terri Carson, Auteur ; Laurie Morris, Auteur ; Jim Bohannon, Auteur Année de publication : 2022 Article en page(s) : p. 60-66 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Ameublement
Bois -- Revêtements protecteurs
Bois extérieurs
Dureté (matériaux)
Eau bouillante
Formulation (Génie chimique)
Polyacryliques
Polymères en émulsion
Polyuréthanes
Résistance à l'abrasion
Résistance chimique
Résistance thermique
Revêtements en phase aqueuseIndex. décimale : 667.9 Revêtements et enduits Résumé : Industrial wood coatings encompass several market areas, including furniture, kitchen cabinets, building products, and decorative coatings.
Requirements for these markets largely depend on their field of application.
Exterior performance is focused on high durability and protection against humidity, while interior coatings require properties such as scratch, chemical and abrasion resistance. One of the largest sectors of the interior market is the furniture industry.
Several resin technologies are being used by coatings formulators in this market, including solventborne (SB), waterborne (WB) UV polyurethane dispersions (PUDs), and self-crosslinking acrylics. Several criteria are of importance in considering which technology to use.
Each technology has advantages and disadvantages, and a comparison has been summarized based on the criteria in Figure 1. The dominant technology used in North America is solventborne, including nitrocellulose (NC) and acid cure conversion varnish. These coatings have many benefits, including fast dry time and very high gloss, and they enhance the wood appearance. They are also very economical and can be easily applied by spraying, rolling, curtain coat, and dipping.Note de contenu : - Fig. 1 : Resin technology comparison
- Fig. 2 : Chemical resistance
- Fig. 3 : Chemical of SC acrylics
- Fig. 4 : Boiling water resistance
- Fig. 5 : Scratch resistance comparison
- Fig. 6 : Koenig hardness of UV PUDs
- Fig. 7 : Koenig hardness of SC acrylics
- Table 1 : Basic properties of water-based resins
- Table 2 : Water-based UV formulationEn ligne : https://drive.google.com/file/d/1894kmpA2ncTLNR8dDP6dJ0Y1KvCd9PNO/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37866
in COATINGS TECH > Vol. 19, N° 5 (05-06/2022) . - p. 60-66[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23507 - Périodique Bibliothèque principale Documentaires Disponible Wax attracts attention / Alain Bouvy in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 195, N° 4485 (02/2005)
PermalinkWettability of waterborne coatings on chemically and thermally modified pine wood / Marko Petric in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 2 (06/2007)
PermalinkWhen time is your enemy / Allen Zielnik in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 202, N° 4571 (04/2012)
PermalinkPermalinkWood moisture content of coated wood/aluminium windows / Gerhard Grüll in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 87, B2 (06/2004)
PermalinkPermalinkWood protection grows on trees / Issam Ahmed Mohammed in EUROPEAN COATINGS JOURNAL (ECJ), N° 02/2010 (02/2010)
PermalinkWood surface modification by in-situ sol-gel deposition of hybrid inorganic-organic thin films / Mandla A. Tshabalala in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 4 (12/2007)
PermalinkWood surfaces protected with transparent multilayer UV-cured coatings reinforced with nanosilica and nanoclay. Part I : morphological study and effect of relative humidity on adhesion strength / William Nguegang Nkeuwa in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 3 (05/2014)
PermalinkWoodcoatings : protecting and enhancing natural beauty / Sunil Menon in PAINTINDIA, Vol. LXI, N° 6 (06/2011)
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