Improving performance / William J. Rosano in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 197, N° 4515 (08/2007)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 197, N° 4515 (08/2007) . - p. 18-21 Titre : Improving performance Type de document : texte imprimé Auteurs : William J. Rosano, Auteur ; Marie Bleuzen, Auteur ; Gary R. Larson, Auteur ; Leo J. Procopio, Auteur Année de publication : 2007 Article en page(s) : p. 18-21 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Brillance (optique) Chlorure de polyvinyle Dioxyde de titane Encapsulation Latex Plan d'expérience Résistance à l'abrasion Résistance au lavage Revêtements en phase aqueuse:Peinture en phase aqueuse Index. décimale : 667.9 Revêtements et enduits Résumé : The performance and appearance of pigmented waterborne coatings strongly depend on the degree to which the various particles (pigments and polymer) are dispersed throughout the dried film. The ideal state of dispersion is usually when all particles are reduced to and remain as non-flocculated primary particles. Polymer particles, pigments and fillers, not optimally dispersed can adversely affect the ability of the coating to provide adequate barrier (to electrolytes, water, gases, etc) properties. In addition, poorly dispersed pigments and fillers can affect the ability to add colourant as well as paint colour stability under the applied shear forces that can occur during application (eg brushing and spraying). Note de contenu : - More efficient interaction between pigment and latex polymers - Experimental design - Improved gloss through more even pigment dispersion - Improved hiding power - Superior protective properties - Improved wash and scrub resistance - Pigment particles with superior encapsulation - Quality improvements and cost advantages - TABLES : 1. Film gloss and gloss retention after UV-A exposure of 18 PVC white paints based on CFM or SM containing binders - 2. Film gloss (20°/60°) as a functionof TiO2 loading of paints based on CFM or SM containing binders - 3. Contrst ratio as a functionof TiO2 loading for paints based on CFM or SM containing binders - 4. Blister formation of 18 PVC white paints based on CFM or SM containing binders after a two week exposure to salt frog - 5. Paint removal after 200 scrub cycles of an above critical PVC paint - 6. Percent latex adsorbed for polymer composition based on CFMs and SMs - FIGURES : 1. FE-SEM of dried 18 PVC TiO2 paints cast one on top of the other based on composition A using CFM (top half ofimage) and SM (lower half of image) - 2. Coating resistance (Rc) as a function of exposure time to a 5% NaCl solution as derived from EIS spectra of SM (red trace, closed symbols) and CFM (blue trace) based polymers formulated in white gloss paints En ligne : https://drive.google.com/file/d/1CGxKiTXix5LafmbC9emeI8eH9Rnd4W0T/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27308 [article]

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Morphological changes in exterior surface coatings after exposure to cyclic water submersion and ultraviolet exposure / Armin B. Burghart in COATINGS TECH, Vol. 17, N° 6 (06/2020)  

[article]  inCOATINGS TECH > Vol. 17, N° 6 (06/2020) . - p. 28-35 Titre : Morphological changes in exterior surface coatings after exposure to cyclic water submersion and ultraviolet exposure Type de document : texte imprimé Auteurs : Armin B. Burghart, Auteur ; Sridhar G. Lyer, Auteur ; William J. Rosano, Auteur Année de publication : 2020 Article en page(s) : p. 28-35 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Immersion Morphologie (matériaux) Revêtements -- Analyse:Peinture -- Analyse Revêtements -- Défauts:Peinture -- Défauts Revêtements -- Effets du rayonnement ultraviolet:Peinture -- Effets du rayonnement ultraviolet Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : Exterior surface coatings used in many applications can be exposed for long periods of time to cyclic exposure consisting of water submersion or local water surface puddling followed by water evaporation and solar exposure. Under such conditions, several macroscopic defects can appear including blistering, adhesion loss, soil pick-up, cracking, erosion, etc. However, quite often surface microscopic film defects can start long before these macroscopic defects are visibly evident. In this article, we show surface microscopic morphology changes to coatings cycled between water (submersion) and ultraviolet (UV) exposure where both polymer and formulation compositional factors were explored. Scanning electron microscopy (SEM) showed microscopic defects such as polymer-filler separation, filler removal, and degradation and crack formation appearance after short-term (one month) cyclic testing. The micrographs also revealed that the observed film defects were confined to the exposed surface and about a few filler particle diameters deep. Note de contenu : - Table 1 : Flexible roof coating screening formulation En ligne : https://drive.google.com/file/d/1RvyZQrUAznRtADhgH9ZZNGQocJdedeRU/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34357 [article]

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Optimal dispersion / Marie Bleuzen in EUROPEAN COATINGS JOURNAL (ECJ), N° 05/2007 (05/2007)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 05/2007 (05/2007) . - p. 144-149 Titre : Optimal dispersion : Latex/pigment composite particules improve waterborne paints Type de document : texte imprimé Auteurs : Marie Bleuzen, Auteur ; Leo J. Procopio, Auteur ; Gary R. Larson, Auteur ; William J. Rosano, Auteur Année de publication : 2007 Article en page(s) : p. 144-149 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : Acrylic binders - The quality of paint is to large degree dependent on the quality of the pigment particles dispersion. Latex particles containing a new proprietary acrylic monomer capable of superior binding too pigment surfaces show a significant increase in the dispersion of TiO2 particles throughout the dry film. This leads to a considerable improvement in key paint performance properties. En ligne : https://drive.google.com/file/d/17ScuyqQSvSECaVkgKDuQqZ9BWAB4LIQP/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8339 [article]

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