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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