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Titre : Watching paints weather : One company's journey to understand the exterior durability of paints and coatings Type de document : texte imprimé Auteurs : Leo J. Procopio, Auteur Année de publication : 2022 Article en page(s) : p. 22-31 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Applications extérieures
Climat
Durée de vie (Ingénierie)
Résistance aux conditions climatiques
Revêtements:PeintureIndex. décimale : 667.9 Revêtements et enduits Résumé : When asked by those outside the paint and coatings industry what they do for a living, coatings scientists are often tempted to offer some levity and respond with the line, "I watch paint dry". Of course, on the surface it sounds quite dull, but unbeknownst to the inquisitors, the joke is on them because the drying and curing of coatings is actually a very complex process that has generated decades of intense scientific study. Note de contenu : - The science of paint durability
- The Dow exposure station
- Exposure station mission
- Location, location, location
- Direction and angle
- Substrates
- Exposure vision
- What's next for the Dow exposure stationEn ligne : https://drive.google.com/file/d/15lSZGSG67XXqSkgmuEhp3jaQYbsLLQDn/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38063
in COATINGS TECH > Vol. 19, N° 7 (08-09/2022) . - p. 22-31[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23604 - Périodique Bibliothèque principale Documentaires Disponible Water concentration distribution in coatings during accelerated weathering protocols / Brian R. Hinderliter in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 3 (05/2015)
[article]
Titre : Water concentration distribution in coatings during accelerated weathering protocols Type de document : texte imprimé Auteurs : Brian R. Hinderliter, Auteur ; Erik D. Sapper, Auteur Année de publication : 2015 Article en page(s) : p. 477-487 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Diffusion (physique)
Durée de vie (Ingénierie)
Essais accélérés (technologie)
Prévision, Théorie de la
Revêtements -- Effets de l'humidité:Peinture -- Effet de l'humiditéIndex. décimale : 667.9 Revêtements et enduits Résumé : The long outdoor service life of painted metal and wood objects, often measured in decades, requires the use of accelerated weathering protocols to predict the long-term efficacy and performance of new barrier protective coating candidates. The mechanism of damage imposed on a coating system in accelerated weathering tests must have parity with the damage mechanisms occurring within the system as it undergoes natural, in-service weathering. Similarly, the physical conditions involved in the accelerated exposure regime, including water distribution as it is defined both temporally and spatially, must show equivalency to the natural exposure regime. An added complication in accurately accelerating coating damage is that the wet and dry cycles of accelerated weathering and corrosion test protocols are often performed at different and elevated temperatures from in-service exposure, which results in altered bulk transport and diffusion rates of water during each phase of the weathering or corrosion protocol, when compared to those rates experienced in field or in-service conditions. In this study, Fick’s law of diffusion is applied to coating surfaces exposed to surface water concentrations at cyclical intervals for a set of two-stage accelerated weathering protocols. The governing equations are solved using Laplace transforms followed by time rescaling to account for the variation in temperature, which impacts the diffusion coefficient between the wet and dry portions of several accelerated weathering protocols. This serves to predict the asymptotic average water concentration within the coating as well as at the coating–metal interface, based on the diffusion and temperature parameters of the coating and the parameters of the accelerated weathering protocol, including the duration of each imposed wet or dry stage. The analytic solution to Fick’s second law also allows the water concentration at the substrate–coating interface to be predicted based on Arrhenius parameters of the diffusion process. This resultant average time of wetness and water concentration variance at the coating–substrate interface can be used to more directly compare corrosion and adhesion loss between various accelerated weathering protocols and natural weathering conditions. The numerical average and range of water concentration as a function of coating depth can then be used to interpret coating damage distribution with depth, and enable more insightful comparison of the results of various accelerated weathering protocols. The simulations indicate that good barrier systems may actually exhibit increased barrier properties in accelerated protocols as compared to systems with mediocre or poor barrier performance as determined by global diffusion coefficients. The good barrier coating imparts substantially less exposure challenge to the interface than the mediocre or poor barrier coatings in accelerated weathering protocols. Therefore, in industry-standard tests, the observed performance gain of good barrier coating systems over poor systems may be unduly exaggerated. However, the overall exposure challenge to the interface of a good barrier coating is likely to be larger in service or field conditions due to the much extended time of wet exposure. Thus, laboratory-accelerated weathering cycles that do not consider the impact of temporal and spatial diffusion could potentially misrepresent the quality of a coating, in most cases overestimating the performance of coatings with good baseline barrier protection for adhesion or corrosion protection. In other words, the accelerated weathering protocols do not equally challenge the interface of different coatings operating in the same in-service conditions. Note de contenu : - Analytic solution method to cyclic boundary conditions
- Nondimensionalization of cyclic Fickian diffusion
- Spatial solution to diffusion equation in Laplace space
- Asymptotic average concentration at metal interface and throughout
- Series solution to cyclic water boundaryDOI : 10.1007/s11998-015-9661-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9661-8.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24172
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 12, N° 3 (05/2015) . - p. 477-487[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17244 - Périodique Bibliothèque principale Documentaires Disponible Waterborne coatings and sustainability in industrial wood coatings / Beth Earnst in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 207, N° 4635 (10/2017)
[article]
Titre : Waterborne coatings and sustainability in industrial wood coatings Type de document : texte imprimé Auteurs : Beth Earnst, Auteur Année de publication : 2017 Article en page(s) : p. 21-24 Langues : Anglais (eng) Catégories : Bois -- Revêtements:Bois -- Peinture
Durée de vie (Ingénierie)
Revêtements en phase aqueuse
Revêtements poudre:Peinture poudreIndex. décimale : 667.9 Revêtements et enduits Résumé : The industrial wood coatings market is estimated at E6.bbn in size and is growing at a compound annual growth rate in excess of two percent. The growth of the market is driven by macro-trends, such as the increased urbanisation and growth of the middle class in Asia, regional increases in population and home ownership, and moves to increase productivity and reduce cost by pre-priming joinery items, such as cladding and windows prior to finishing on construction sites. Competing against these strong growth drivers is the accelerating trend of substitution by alternate substrates most notably, the substitution of décor foils for wood/veneers in furniture and panelling and luxury vinyl tile for flooring ; such technologies have made great strides in their aesthetic performance over the past several years.
The industrial wood market may be broadly split into four key segments of Cabinets, Flooring, Fumiture, and Building Products. Figure 1 shows the values and geographic-splits of these segments.
This article explores some of the latest demands for sustainable coatings and specifically explores the requirements for products which cannot be delivered by fully roll-coated flat line applications where 100% UV technology is clearly recognised as the benchmark for sustainability given the excellent transfer rates, productivity, and zero solvent characteristics of the product.Note de contenu : - Replacement of nitrocellulose lacquers by waterborne coatings
- Growth of waterborne UV technology
- Powder coatings for wood/MDF
- FIGURES : 1. Global industrial wood coatings market : 6.5Ebn - 2. A step panel created by colour stylists at AkzoNbel to define how a wood finish should appear when applied in several steps. Below, a example of a case good created from a step panel - 3a. Picture showing Aquasilk coating on left vs conventional WB (wet) - 3b. Aquasilk coating wet - 3c. Aquasilk coating dry - 4. Relative performance of Aquasilk products, MPU and nitrocellulose - 5. Examples of whitening caused by trapped water - 6. Flow out of powder coating and powder + liquid. Full powder system A side and powder only A side, note the mrring and bubbling in the crevices
- Table : Values obtained assuming 75% coating transfer efficiency and a 6ft2 door surfaceEn ligne : https://drive.google.com/file/d/1pOuacG85YnicXi-XJtNTEO6wTv5_qcF6/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29305
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 207, N° 4635 (10/2017) . - p. 21-24[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19293 - Périodique Bibliothèque principale Documentaires Disponible Waterborne hybrid (alkyd/styrene acrylic) emulsion polymers and exterior paint applications / Nurullah Kartaloglu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 5 (09/2023)
[article]
Titre : Waterborne hybrid (alkyd/styrene acrylic) emulsion polymers and exterior paint applications Type de document : texte imprimé Auteurs : Nurullah Kartaloglu, Auteur ; Suna Elif Akçin, Auteur ; Mesut Eren, Auteur ; Ali Delibas, Auteur Année de publication : 2023 Article en page(s) : p. 1621-1637 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Brillance (optique)
Chanvre et constituantsLe chanvre ou chanvrier (Cannabis sativa L.) est la seule espèce du genre botanique Cannabis. Ce terme latin est souvent utilisé aussi comme nom vernaculaire pour distinguer les variétés de chanvre cultivé à usage industriel des variétés de cannabis à usage récréatif ou médical. C'est une espèce de plante annuelle, de la famille des Cannabaceae. La graine de chanvre s'appelle le chènevis.
Copolymère styrène acrylique
Durée de vie (Ingénierie)
Essais dynamiques
Formulation (Génie chimique)
Huiles et graisses végétales
Latex
Matériaux hybrides
Opacité (optique)
Polyalkydes
Polymères -- Propriétés mécaniques
Polymères -- Synthèse
Revêtements en phase aqueuse
Revêtements en phase aqueuse:Peinture en phase aqueuse
Traction (mécanique)Index. décimale : 667.9 Revêtements et enduits Résumé : Since alkyd resins include hazardous solvents, converting alkyds into waterborne hybrid polymers is an essential research topic. Here, alkyd/styrene acrylic waterborne hybrid polymers were synthesized in the presence of monomers, water, emulsifiers, and an initiator by using synthesized alkyd resins at 0%, 5%, 10%, and 15% ratios based on the total monomer ratio. A mini-emulsion technique and a semi-batch polymerization method were used to synthesize the latexes. Two different biosources, tall oil fatty acids (TOFA) and hemp seed oils (HSO), were used to synthesize the alkyd resins. Synthesized waterborne hybrid latexes and their films were analyzed by using FTIR, NMR, particle size, MFFT, TGA, DSC, CA, AFM, and mechanical tests. It was determined that the type and concentration of the alkyds affected the viscosity, particle size, Tg and MFFT values, and appearance. It was also identified that alkyd incorporation took place with grafting and that the alkyd concentration was particularly effective in increasing the particle size. In addition, experiments were carried out on waterborne paint systems for exterior paint by using synthesized hybrid polymer emulsions. It was observed that the alkyd content was not effective in changing the paint color in hybrid latexes. As a result, it is suggested that hybrid waterborne latexes could be used for exterior paints. Note de contenu : - EXPERIMENTAL : Materials - TOFA-based alkyd resin synthesis - HSO-based alkyd resin synthesis - Synthesis of alkyd/styrene acrylic waterborne hybrid polymers - Preparation of paints
- TESTS AND MEASUREMENTS : Analysis for TOFA and HSO - Analyzes of alkyd/styrene acrylic waterborne hybrid polymers - Analysis of paints
- RESULTS AND DISCUSSION : Evaluation of TOFA and HSO - Evaluation of alkyd resins and alkyd/styrene acrylic waterborne hybrid polymers - Evaluation of paint samples prepared with hybrid latexes
- Table 1 : Chemicals used in the study
- Table 2 : Formulation of alkyd resin synthesis
- Table 3 : Recipes for preparing hybrid latexes
- Table 4 : Formulation of the paint
- Table 5 : Physicochemical properties of polymer emulsions
- Table 6 : Tensile test values
- Table 7 : Properties of high-gloss opaque and transparent paints
- Table 8 : Effect of QUV exposure on color parameters of hybrid polymer films
- Table 9 : Hardness control resultsDOI : https://doi.org/10.1007/s11998-023-00767-6 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00767-6.pdf?pdf=button Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39976
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 5 (09/2023) . - p. 1621-1637[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24242 - Périodique Bibliothèque principale Documentaires Disponible Waterborne silicone-organic hybrid coatings for exterior applications / T. Easton in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 2 (06/2007)
[article]
Titre : Waterborne silicone-organic hybrid coatings for exterior applications Type de document : texte imprimé Auteurs : T. Easton, Auteur ; S. Poultney, Auteur Année de publication : 2007 Article en page(s) : p. 187-190 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Applications extérieures
Copolymère silicone acrylique
Copolymères silicone alkydes
Durée de vie (Ingénierie)
Matériaux hybrides
Résistance aux conditions climatiques
Revêtements en phase aqueuse:Peinture en phase aqueuseIndex. décimale : 667.9 Revêtements et enduits Résumé : Waterborne alkyd and acrylic resins can be modified with silicone intermediates to improve their weather resistance in paints for exterior applications. The alkyds are modified through copolymerization before dispersion in water, using formulations and process conditions that minimize the tendency to gel. Acrylic latexes can be post treated with selected silicone intermediates at ambient temperature to give hybrid coating binders. In both cases, the gloss retention and chalking resistance of paint films are greatly increased. DOI : 10.1007/s11998-007-9018-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-007-9018-z.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3660
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 4, N° 2 (06/2007) . - p. 187-190[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 008269 - Périodique Bibliothèque principale Documentaires Disponible Wear resistance evaluation method of painting LADA cars / S. E. Pavlihkin in EUROPEAN COATINGS JOURNAL (ECJ), N° 1-2/01 (01-02/2001)
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