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Bitumen cool roofs - getting cooler and cooler / Massimo Longoni in EUROPEAN COATINGS JOURNAL (ECJ), N° 1 (01/2020)
[article]
Titre : Bitumen cool roofs - getting cooler and cooler : Novel polymer technology maintains reflectance efficiency Type de document : texte imprimé Auteurs : Massimo Longoni, Auteur ; Brent Crenshaw, Auteur Année de publication : 2020 Article en page(s) : p. 48-53 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chlorure de polyvinyle
Formulation (Génie chimique)
Liants
Plan d'expérience
Polyacryliques
Réflectance
Toiture -- RevêtementsIndex. décimale : 667.9 Revêtements et enduits Résumé : Cool roofs have become very popular in recent years because they can reflect solar heat and keep their surface cool under direct sunlight. This behaviour has been proven to have an impact on the cooling of the interior of buildings, so they reduce energy consumption and costs and increase quality of life. This has been confirmed in multiple case studies. Note de contenu : - Bitumen roofs
- Tobacco juicing and reflectance
- Experimental : Section 1 : factors influencing bleed blocking
- Experimental section 2 : binder bleed-block comparison
- Experimental section 3 : binder dirt-pickup comparison
- Fig. 1 : Appearance of roof coatings applied on bitumen substrates after 500 h QUVa exposure
- Fig. 2 : How factors affect bleed-block resistance after three weeks in DOE 2
- Fig. 3 : Bleed blocking (B13) behaviour after 250, 500 and 1,500 hours
- Fig. 4 : How layer thickness influences BB behaviour
- Fig. 5 : Coating samples at 1,000-micron WFT, h0 vs after 500 hours of QUV
- Fig. 6 : 24-hour dirt-pickup colour change, dE
- Fig. 7 : 18-hour dirt-pickup colour change, dE
- Table 1 : Factors in DOE2
- Table 2 : PVC ladder study
- Table 3 : Specifications of the tested bindersEn ligne : https://drive.google.com/file/d/19EvS55V0XYwgWXoJxhhPfQfbLyvD_gcJ/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33403
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 1 (01/2020) . - p. 48-53[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21439 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Cool roofs and hollow microspheres : Spherical micron-sized fillers help improve the elastic properties of coatings Type de document : texte imprimé Auteurs : Jan Nordin, Auteur ; Olof Sandin, Auteur ; Benjamin J. Naden, Auteur Année de publication : 2019 Article en page(s) : p. 20-24 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorption
Allongement à la rupture
Charges (matériaux)
Corps creux
Elasticité
Formulation (Génie chimique)
Huiles et graisses
Liants
Microsphères
Réflectance
Réflectivité thermique
Revêtements -- Propriétés mécaniques
ThermoplastiquesUne matière thermoplastique désigne une matière qui se ramollit (parfois on observe une fusion franche) d'une façon répétée lorsqu'elle est chauffée au-dessus d'une certaine température, mais qui, au-dessous, redevient dure. Une telle matière conservera donc toujours de manière réversible sa thermoplasticité initiale. Cette qualité rend le matériau thermoplastique potentiellement recyclable (après broyage). Cela implique que la matière ramollie ne soit pas thermiquement dégradée et que les contraintes mécaniques de cisaillement introduites par un procédé de mise en forme ne modifient pas la structure moléculaire.
Toiture -- RevêtementsIndex. décimale : 667.9 Revêtements et enduits Résumé : Low-density hollow microspheres as fil-ers in elastomeric waterproof/cool roof coatings can enhance a number of key properties. Compared with their minerai counterparts, Iow-density fillers help re-duce the weight of the coating and pro-vide a relatively strong boost to solar reflectance, reducing both the exterior surface temperature and the need for air-conditioning. Some coatings produc¬ers claim that hollow microspheres, and especially resilient hollow thermoplas¬tic microspheres, also help maintain the elastomeric properties of the binder in filled coatings. Note de contenu : - Unexpected cooling
- Effect of fillers on mechanical properties
- Experimental
- Greater elongation at break
- Oil absorption
- Filler-binder considerations
- Resilience makes the difference
- Enhance tear strength
- Adhesion results inconclusive
- Fig. 1 : Elongation at break of the 5 coatings with various filler ; 100 % CaCO3 ; 50 %/50% CaCO3 and thermoplastic microspheres ; 100 % thermoplastic microspheres ; 50 %/50 % CaCO3 and glass microspheres ; 100 % glass microspheres
- Table 1 : Formulations
- Table 2 : Formulations continued
- Table 3 : Filler volumes in the various formulations
- Table 4 : Elasticity (ASTM D2370) (standard deviation in brackets)
- Table 5 : Oil absorption by the fillersEn ligne : https://drive.google.com/file/d/1hmVdQyOP_3zGm4HKZCw5UeWDXdCZs5uO/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32522
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 5 (05/2019) . - p. 20-24[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20923 - Périodique Bibliothèque principale Documentaires Disponible Fluid-applied roof coatings : Effectively countering water damage in PAINTINDIA, Vol. LXVII, N° 2 (02/2017)
[article]
Titre : Fluid-applied roof coatings : Effectively countering water damage Type de document : texte imprimé Année de publication : 2017 Article en page(s) : p. 66-70 Langues : Anglais (eng) Catégories : Asphalte
Emulsions
Polyurée
Polyuréthanes
Revêtements protecteurs
Toiture -- Revêtements:Toiture -- Peinture
Traîtements de surfaceIndex. décimale : 667.9 Revêtements et enduits Résumé : Water is a patent force. Even the tiniest amount can break down the hardest stone when it freezes in a crack. Man-made structures can also be damaged by water penetration. For long-lasting, seamless protection of all types of substrates, many architects and specifiers turn to liquid polyurethane (PU) waterproofing membranes. And with monsoons very strong in many parts of India, it is perhaps the right time ta discuss water-proofing materials.
Various waterproofing technologies have been developed to keep water away from penetrating into roofs. One such effective roof coating is fluid-applied coating. The market is abuzz with various types of liquid coating products for roofs in the market. A liquid-applied roofing membrane or coating can itself be the exterior weathering surface, or it may be coated with another UV and weather stable layer.Note de contenu : - Benefits galore
- Surface preparation
- Making the right selection : Acrylic coatings - Asphalt emulsion - Polyurea snap cure systems - Polyurethane coatings
- Factors affecting proper selection
- Real life cases : Thailand residential building - Coating systemEn ligne : https://drive.google.com/file/d/18paRwWyHSljduYpoXFlmkhrZwNF-b8aT/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28441
in PAINTINDIA > Vol. LXVII, N° 2 (02/2017) . - p. 66-70[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18864 - Périodique Bibliothèque principale Documentaires Disponible Gel-sol synthesis of surface-treated TiO2 nanoparticles and incorporation with waterborne acrylic resin systems for clear UV protective coatings / Changfeng Chen in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 5 (09/2014)
[article]
Titre : Gel-sol synthesis of surface-treated TiO2 nanoparticles and incorporation with waterborne acrylic resin systems for clear UV protective coatings Type de document : texte imprimé Auteurs : Changfeng Chen, Auteur ; Yuliang Wang, Auteur ; Guiquan Pan, Auteur ; Qingwu Wang, Auteur Année de publication : 2014 Article en page(s) : p. 785-791 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Dioxyde de titane
Nanoparticules
Polyacryliques
Protection contre le rayonnement ultraviolet
Revêtements en phase aqueuse:Peinture en phase aqueuse
Sol-gel, Procédé
Toiture -- Revêtements:Toiture -- PeintureIndex. décimale : 667.9 Revêtements et enduits Résumé : Visible transparent UV protective coatings were developed by incorporating nano-TiO2 into waterborne acrylic systems to provide UV protection for UV-sensitive color cool roofing. Water-based high crystalline TiO2 nanoparticle suspension was prepared via a gel-sol method at a basic pH. The TiO2 nanoparticles have an average size of 20 nm and are stable against agglomeration. As-prepared TiO2 nanosuspension is ready to be well dispersed in commercial waterborne acrylic resin system without extra-surface modification. The fabricated TiO2/acrylic nanocomposite coating achieved a UV cut-off below 350 nm with a visible transmission greater than 85% at 700 nm. It is also demonstrated by using Rhodamine 6G that surface modification of nano-TiO2 with a SiO2 insulation layer would suppress the catalytic activity of nano-TiO2 and improve the UV protection for UV and photocatalysis sensitive dyes. Note de contenu : - MATERIALS AND METHODS : 1. Synthesis of TiO2 and SiO2-TiO2 nanoparticles - 2. Preparation of TiO2/resin and SiO2-TiO2/resin coatings - 3. Characterization - 4. UV test of TiO2 and SiO2-TiO2 photocatalyst on resin matrix
- RESULTS AND DISCUSSION : 1. Surface morphology of TiO2 nanoparticles and SiO2-TiO2 nanoparticles - 2. Effect of pH on the formulation of UV protective coating solution - 3. Surface morphology of the TiO2/acrylic coating - 4. Transparent UV absorbing TiO2/PVDF/acrylic films - 5. UV test of TiO2 and SiO2-TiO2 photocatalyst on resin matrixDOI : 10.1007/s11998-014-9583-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9583-x.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22061
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 11, N° 5 (09/2014) . - p. 785-791[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16538 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Heat reflective coatings Type de document : texte imprimé Auteurs : Rakesh Jain, Auteur ; Vrushali Shinde, Auteur ; Amit Joshi, Auteur ; Chandrashekara R. Haramagatti, Auteur Année de publication : 2018 Article en page(s) : p. 68-84 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Economies d'énergie
Pigments inorganiques
Rayonnement infrarouge
Réflectivité thermique
Toiture -- Revêtements:Toiture -- PeintureIndex. décimale : 667.9 Revêtements et enduits Résumé : Paints and coatings offer various advantages along with the aesthetic value to the substrates to which it is applied. Binders and pigments majorly contribute to various advantages of the coatings. Particularly, pigments contribution is obviously for color and opacity to the paint. Apart from color and opacity the properties such as particle size, shape, and chemistry determines the performance of the coatings. Pigments with exceptionally high light fastness, heat/IR reflectance properties are essential for exterior coatings. Preferably the roofs which are exposed most to the solar radiation impact on the high heat build-up, and add to the load on cooling. To overcome such issues mixed metal oxide/complex inorganic pigments are generally used in heat/IR reflective coating. These pigments with high total solar reflectance (TSR), results in reflecting the IR radiation and keep the surface or interior cooler. Thus they contribute to energy savings, sustainability, provide long life to coating as well as the buildings. This review article focusses on various aspects of the heat/IR reflective coatings, particularly decorative applications : The types of pigments, processes, mechanisms, advantages, and contribution to the sustainability are highlighted. Note de contenu : - SOLAR SPECTRUM AND HEAT BUILD UP : Total solar reflectance (TSR)
- TYPES OF IR REFLECTIVE PIGMENTS : Inorganic pigments - Complex inorganic color pigments (CICPs)
- MECHANISM OF COOL EFFECT
- APPLICATIONS AND ADVANTAGES : Roof/roof tile - Military - Automotive
- FIGURES : 1. Classification of solar passive cooling techniques for roofs - 2. Visual comparison of the cool color and conventional color. Cool colors are based on yellow : yellow 346 (chrome antimony), black : black 28 (copper chromite), brown 1 : brown 157 (zinc iron chromite), brown 2 : brown rosse 208 (iron oxide) - 3. A typical solar spectrum covering UV, visible and IR radiations - 4. Path of light as it penetrates two different coatings, one having pigments with a higher refractive index than the other - 5. Reflectance curves for different types of black, and the red colored curve represents non IR reflective type of black - 6. Correlation between TSR value and surface temperature for black pigments - 7. Reflectance curves for inorganic cobalt blue and organic phtalocyanine (Phtalo) blue - 8. Spectral solar reflectance of TiO2, a green leaf, standard carbon black and a complex inorganic color pigment containing infrared reflective (Fe, Cr)2O3 pigment (Normalized Solar Irradiance Shown for Reference) - 9. Principle of light falling on a surface - 10. Natural sunlight exposure in Florida shows that the CRCMs have improved the fade resistance of the painted PVDF metals
- TABLE : Major suppliers, color index number, chemistry of some IR reflective pigmentsEn ligne : https://drive.google.com/file/d/1MnQXxwnefNB6XO_-tVvTYp06z5pMZ9Ri/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30324
in PAINTINDIA > Vol. LXVIII, N° 1 (01/2018) . - p. 68-84[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19766 - Périodique Bibliothèque principale Documentaires Disponible PermalinkHollow thermoplastic microspheres in elastomeric cool roof coatings / Jan Nordin in COATINGS TECH, Vol. 16, N° 1 (01/2019)
PermalinkKeeping roofs cool / George R. Pilcher in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 194, N° 4483 (12/2004)
PermalinkPermalinkNovel hydrolytically stable silane additives for improving the performance of waterborne acrylic roof coatings / Jacob D. Shevrin in COATINGS TECH, Vol. 18, N° 9 (09/2021)
PermalinkReflective properties of hollow microspheres in cool roof coatings / Olof Sandin in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 4 (07/2017)
PermalinkPermalinkPermalinkPermalinkPermalinkPermalinkPermalinkTwo-component hybrid coating for roofs in INTERNATIONAL SURFACE TECHNOLOGY (IST), Vol. 8, N° 3 (2015)
PermalinkPermalinkWhat type of coatings are used to protect concrete from heat (heat reflection coatings) ? / Harish Agrawal in PAINTINDIA, Vol. LXXIII, N° 5 (05/2023)
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