Dépouillements

A slippery solution / Cynthia Challener in COATINGS TECH, Vol. 9, N° 8 (08/2012)  

[article]  inCOATINGS TECH > Vol. 9, N° 8 (08/2012) . - p. 24-25 Titre : A slippery solution Type de document : texte imprimé Auteurs : Cynthia Challener, Auteur Année de publication : 2012 Article en page(s) : p. 24-25 Langues : Américain (ame) Catégories : Givrage -- Prévention Hydrophobie Polypyrroles Revêtements Index. décimale : 667.9 Revêtements et enduits Résumé : There have been many reports of super-hydrophobic coatings based on the natural, nonwetting properties associated with the lotus leaf. These systems are basedon microtextured surfaces that create a stable air-liquid interface, and under low humidity conditions have shown promise for the prevention of ice formation, even at very low temperatures. However, in high humidity, the textured surface provides numerous nucleation sites for condensing droplets. Thus at freezing temperatures, they can induce the rapid formation of frost that adheres more strongly within the topographical features that ice on a smooth surface. En ligne : https://drive.google.com/file/d/1ZPKMgl4fQQy6sx4lCtv2WO4KEHOlWtXi/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15752 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
14112	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Novel multi-phase acrylics / Ivan Tyre in COATINGS TECH, Vol. 9, N° 8 (08/2012)  

[article]  inCOATINGS TECH > Vol. 9, N° 8 (08/2012) . - p. 32-38 Titre : Novel multi-phase acrylics : For high performance coatings Type de document : texte imprimé Auteurs : Ivan Tyre, Auteur ; Terri Carson, Auteur Année de publication : 2012 Article en page(s) : p. 32-38 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion Anticorrosion Polyacryliques Polymères en émulsion Polymérisation Résistance au chocs Revêtements:Peinture Index. décimale : 667.9 Revêtements et enduits Résumé : For the past few decades, coatings chemists have been responsible for developing high performance coatings while complying with tightening environmental restrictions, particularly the reduction of volatile organic compound (VOC) content. With the initial restrictions in the early 1990s, a chemist could potentially pull out "extra" solvents such as propylene glycol which enhanced freeze/thaw, flow and leveling, and open time, and reduced the levels of coalescing aids used to lower the minimum film formation temperature (MFFT) of the coating based on very hard polymers with glass transition temperature (Tg) in the 40-60°C range. As restrictions became even tighter, a strategy employed (and, in some cases, a very effective one) was the blending of soft and hard single phase resins. Care had to be taken with this approach, as film formation with two distinct polymer particles of varied size and MFFT did not always impart desired properties. Clear, haze-free films were not guaranteed and block resistance properties were subject to the ration and size of the hard polymer to soft particle. With the advent of computer-controlled reaction vessels, the production of multi-phase particles that have both a soft segment for film formation at lower VOC, along with improved elasticity, and a harder portion for property enhancements such as block and dirt pick-up resistance, is possible. This article does not intend describes the fine details of manufacturing these resins, but presents a simplified schematic view along with a description of possible morphologies. Note de contenu : - Polymerization scheme and morphology - Formulating guidelines with multi-phase dispersions - Benchmarking studies of single phase versus multi-phase emulsions in coatings applications : Efflorescence resistance - Wood primer applications (direct-to-metal applications - block resistance - corrosion resistance - gloss retention - impact resistance/flexibility - Tape pull adhesion method B (crosshatch version) En ligne : https://drive.google.com/file/d/1Mdamlv30MGKEAh_b_l3uYb0hbKY8MtMk/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15753 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
14112	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Shining new light opaque polymer / M. Eckenrode in COATINGS TECH, Vol. 9, N° 8 (08/2012)  

[article]  inCOATINGS TECH > Vol. 9, N° 8 (08/2012) . - p. 40-45 Titre : Shining new light opaque polymer Type de document : texte imprimé Auteurs : M. Eckenrode, Auteur ; David M. Fasano, Auteur Année de publication : 2012 Article en page(s) : p. 40-45 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Polyacétate de vinyle Polyalkydes Polymères opaques Revêtement en phase solvant:Peinture en phase solvant Revêtements Index. décimale : 667.9 Revêtements et enduits Résumé : An opaque polymer was developed in the 1970s to provide paint formulators with a light scattering pigment to supplement the use of titanium dioxide (TiO2). The hollow-sphere structure of opaque polymer provides a controlled and consistent level of air void hiding in paint through the refractive index differential between the internal air void and the outer polymer shell. The encapsulated air voids provide hiding without the loss of resistance properties associated with other raw materials which provide hiding through increased film porosity. Extensive research and proactical experience demonstrate that opaque polymer may be used to economically replace 10 to 20% of TiO2 in white and paster architectural paints. Recent and continued increases in TiO2 price have raised the formulated cost of all paints. As a result, there is growing interest in using opaque polymer at higher levels of TiO2 replacement in white and pastel acrylics. This interest extends to using opaque polymer in mid-tone tint bases, primers, and polyvinyl acetate (PVC) paints. reformulation and performance studies coupled with a new proprietary reformulation tool demonstrage the expanded utility of opaque polymer in these formulation spaces. in addition, technology advances have led to the development of a next-generation opaque polymer that can beused in waterborne as well as solventborne alkyd architectural paints. Note de contenu : - How opaque polymer scatters light - Performance at higher TiO2 replacement in a flat formulation - Exterior durability at higher TiO2 replacement - Economy flats, primers, mid-tones - PVA formulation space - Utility in solventborne alkyds - Reformulating tool En ligne : https://drive.google.com/file/d/1M46yBBMJv1669DH8k5cr8iRRQMyuOKq0/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15754 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
14112	-	Périodique	Bibliothèque principale	Documentaires	Disponible