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Advancing temporary protection with liquid strippables in COATINGS TECH, Vol. 16, N° 5 (05/2019)  

[article]  inCOATINGS TECH > Vol. 16, N° 5 (05/2019) . - p. 24-25 Titre : Advancing temporary protection with liquid strippables Type de document : texte imprimé Année de publication : 2019 Article en page(s) : p. 24-25 Langues : Américain (ame) Catégories : Films plastiques Protection temporaire Index. décimale : 667.9 Revêtements et enduits Résumé : Temporary protective coatings may not be designed to last long, but they play a very important role in protecting valuable and easily damaged materials and products during post processing metal fabrication operations, storage, shipment, general handling, and installation in some cases. In fact, they are used on everything from personal electronic products and appliances to brass fixtures and silver-plated housewares to construction materials like piping to automobiles. En ligne : https://drive.google.com/file/d/1dmWniFTFIEdN2btcQuiNubcd6GvKc9wS/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32557 [article]

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Cationic stain blocking primer technology / Greg Monaghan in COATINGS TECH, Vol. 16, N° 5 (05/2019)  

[article]  inCOATINGS TECH > Vol. 16, N° 5 (05/2019) . - p. 26-33 Titre : Cationic stain blocking primer technology Type de document : texte imprimé Auteurs : Greg Monaghan, Auteur ; Alex Pinnix, Auteur Année de publication : 2019 Article en page(s) : p. 26-33 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cations Chlorure de polyvinyle Epoxydes Essais (technologie) Formulation (Génie chimique) Polyacryliques Primaire (revêtement) Résistance aux taches Revêtements en bâtiment Revêtements en phase aqueuse Index. décimale : 667.9 Revêtements et enduits Résumé : Most water-based architectural stain blocking primers typically have only moderate stain blocking performance, and they are designed to lock stains in the primer coat rather than block stains. This leads to a major performance difference compared to solvent-based primers. Since the stain is visible in the dry film when a bleeding substrate is coated with water-based primer, the painter cannot tell with any degree of certainty if the stain will migrate into the topcoat. Novel cationic water-based primers offer far superior stain blocking and are like solvent-based primers because many stains are blocked by the primer coat rather than locked into the primer coat. For these cationic primers, however, manufacturing procedures and raw materials are different from those typically used in conventional anionic architectural coatings. Note de contenu : - Table 1 : Cationic stain blocking primer formulation - Table 2 : Marker and ink stain blocking : comparison to commercial controls - Table 3 : Marker and ink stain blocking : polymer blend ratios vs commercial water-based stain blocking primer - Table 4 : Marker and ink stain blocking : PVC ladder at 50% acrylic and 50% epoxy ester - Table 5 : Tannin stain blocking : blend ratios of acrylic and epoxy, 34% PVC - Table 6 : Tannin stain resistance of the PVC ladder at 50% acrylic and 50% epoxy - Table 7 : Early sandability of experimental primers - Table 8 : Crack resistance : thermal and moisture cycling, two coats on yellow pine - Table 9 : Wet adhesion to gloss alkid and metal substrates - Fig. 1 : Stain blocking-primer only - Fig. 2 : Stain blocking primer and topcoat - Fig. 3 : One coat marker and ink stain blocking - Fig. 4 : Primer plus topcoat stain blocking - Fig. 5 : Tannin-stain resistance on redwood : blend ratios of acrylic and epoxy, 34% PVC - Fig. 6 : Tannin stain resistance of the PVC lade - Fig. 7 : Early sandability of experimental primers En ligne : https://drive.google.com/file/d/1ejnO6f1FfJnSFknEu1pU4DsQ8-4un6bR/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32558 [article]

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Confocal microscopy techniques for coatings research / Wenjun Wu in COATINGS TECH, Vol. 16, N° 5 (05/2019)  

[article]  inCOATINGS TECH > Vol. 16, N° 5 (05/2019) . - p. 34-45 Titre : Confocal microscopy techniques for coatings research : Surface and depth characterization of latex paint films Type de document : texte imprimé Auteurs : Wenjun Wu, Auteur ; Dana Garcia, Auteur ; Jeffrey Schneider, Auteur Année de publication : 2019 Article en page(s) : p. 34-45 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation Copolymère styrène acrylique Latex Microscopie confocale à balayage laser Nettoyabilité Résistance aux taches Revêtements -- Analyse:Peinture -- Analyse Revêtements en phase aqueuse:Peinture en phase aqueuse Index. décimale : 667.9 Revêtements et enduits Résumé : Waterborne coatings are multi-component, heterogeneous systems containing a variety of additives, in addition to water, polymer binders, and pigment particles. The distribution of various ingredients in the coating films directly affects a coating’s appearance and performance ; for example, optical properties, substrate adhesion, chemical resistance, and mechanical durability. Over the years, a plethora of analytical tools have been utilized in coatings characterization and defect identification. Microscopy and vibrational spectroscopy are complementary techniques and the combination of the two can provide the most complete information regarding the distributions of different coatings ingredients, as well as the fate and the impact of liquids or particulates that come into contact with the dried coating films. Note de contenu : - EXPERIMENTAL - MATERIALS : Latex and paint samples - Fluorescence of concord grape juice - Confocal Raman microscopy - Confocal laser scanning microscope techniques - Stain resistance and washability - RESULTS AND DISCUSSION : Example 1 : spatial distribution of styrenated additive in acrylic paint films - Example 2 : Surfactant enrichment on paint film surface - - Example 3 : Characterization of stain resistance, stain penetration, and stain removal : Selection of representative staining material and paint samples - Vizualization and quantification of stain penetration using CLSM - Characterization of stain adsorption, penetration and removal using CRM - Fig. 1 : Raman spectra of Paint I-SA film - Fig. 2 : Raman spectra of Paint I-SA film: 4000~800 cm1 - Fig. 3 : Depth attenuation of TiO2 and styrene (20X) bands in Paint I-SA film - Fig. 4 : Raman intensity ratios of styrene to acrylic in Paint I-SA film - Fig. 5 : Raman spectra of Paint I film : 4000~800 cm1 - Fig. 6 : 2nd derivatives of Raman spectra for Paint I film before (6a) and after water rinse (6b) - Fig. 7 : Fluorescence emission spectrum of Welch’s Concord grape juice diluted in water - Fig. 8 : Stain removal or washability performance of Paint I and Paint II - Fig. 9 : Fluorescence images of acrylic polymer AP2 film (blue) stained by grape juice - Fig. 10 : Fluorescence images of grape juice-stained AP2 film after sponge wash using Formula 409 - Fig. 11 : Raman spectrum of partially dried grape juice - Fig. 12 :Fluorescence emission and unshifted Raman spectra of Concord grape juice - Fig. 13 : Grape juice-stained and unstained surface spectra of Paint I films - Fig. 14 : Spectra of unstained and grape juice-stained Paint I (14a) and Paint II (14b) - Fig. 15 : Difference in discoloration of Paint I and Paint II surfaces by grape juice - Fig. 16 : Effect of staining time on Paint I (16a) and Paint II (16b) surfaces - Fig. 17 : Discoloration or color change as a function of grape juice residence time - Fig. 18 : Effect of washing procedure: sponge wash vs water rinse En ligne : https://drive.google.com/file/d/10cF15960T-Isv7D7D5OMH6daBGCNj1GG/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32559 [article]

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Coatings Tech Vol. 16, N° 5 URL