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Hard minerals enhance powder coating performance / Kevin M. Biller in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 212, N° 4673 (02/2022)
[article]
Titre : Hard minerals enhance powder coating performance Type de document : texte imprimé Auteurs : Kevin M. Biller, Auteur Année de publication : 2022 Article en page(s) : p. 32-34 Langues : Anglais (eng) Catégories : Alumine
Carbure de silicium
Charges (matériaux)
Formulation (Génie chimique)
Hydroxyalkylamide
Néphéline Syénite
Polyesters
Résistance à l'abrasion
Revêtement poudre -- AdditifsIndex. décimale : 667.9 Revêtements et enduits Résumé : The author discusses the use of hard minerals to enhance powder coating performance.
Powder coatings continue to expand their share of the industrial coatings market mainly because of their high performance combined with excellent economics. The application of powder coatings can be highly efficient as the oversprayed material can be collected and recycled back into the finishing process. This minimises waste streams, which allows powder's environmental profile to align well with both corporate and regulatory sustainability goals.
Experts forecast robust growth of powder coatings. Global sales of powder coatings in 2021 are estimated to be around US$12.5bn (€10.6bn) with a volume of approximately 5.5bn lbs. (2.5M tonnes). Growth is projected at 3.9 to 5.4% per annum for the next five years.
Abrasion resistance in powder coatings is an important property. Some powders are used to coat items that are subjected to extreme environments such as oil and gas transmission pipelines, whereas other powder coatings are used in decorative applications where appearance is critical. These decorative finishes must maintain their appearance after the handling of parts during assembly and everyday wear and tear.
Improving abrasion resistance is a sought-after goal of powder coating formulators, whether for functional or aesthetic purposes. The use of high hardness minerai fillers is considered one avenue to increase abrasion resistance in powder coatings. This study examines the effect that white fused alumine, nepheline syenite and silicon carbide have on the abrasion resistance of a common powder coating system based on polyester-HAA (hydroxy-alkyl amide) chemistry.Note de contenu : - WESTER MINERALIEN : Objective - Materials - Formulation platform - Processing conditions
- RESULTS : Processability - Aesthetics - Rheology - Colour - Mechanical properties - Abrasion resistanceEn ligne : https://drive.google.com/file/d/1B1yHJEY9fCmu0wUDOmIOxhNoLrqVfbd7/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36972
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 212, N° 4673 (02/2022) . - p. 32-34[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23211 - Périodique Bibliothèque principale Documentaires Disponible Heat-conductive adhesives - cool solutions for versatile applications / Heiko Fauser in ADHESION - ADHESIVES + SEALANTS, Vol. 15, N° 3/2018 (2018)
[article]
Titre : Heat-conductive adhesives - cool solutions for versatile applications Type de document : texte imprimé Auteurs : Heiko Fauser, Auteur Année de publication : 2018 Article en page(s) : p. 18-22 Note générale : Bibliogr. Langues : Multilingue (mul) Catégories : Adhésifs dans les équipements électriques/électroniques
Adhésifs thermoconducteurs
Charges (matériaux)
Epoxydes
Mouillage (chimie des surfaces)
Rhéologie
Stabilité dimensionnelle
ThermocinétiqueIndex. décimale : 668.3 Adhésifs et produits semblables Résumé : Electronic devices are becoming ever smaller and more powerful, which increases the heat their components generate and that needs to be dissipated. This increased thermal load reduces the components' performance and shortens their service life. An optimized heat management helps protect the devices and increase their performance. Note de contenu : - Thermally conductive adhesives : flexible in application
- Epoxy adhesives - versatile and reliable
- Fillers - only the right filling brings the right cooling
- Development of thermally conductive adhesives
- Model systems
- Flow behaviour of thermally conductive adhesives
- Thermal conductivity
- Fig. 1 : Application of two adhesives with different flow behaviours - the different wetting behaviours and dimensional stability are clearly visible
- Fig. 2 : Influence of different filler types on the flow behavious with comparable filling degree (% volume) ; the viscosity of the base resin without filler is 2 Pa-s (black dashed line)
- Fig. 3 : Comparison of the influence of particle shape on viscosity ; a higher degree can be achieved with round particles (typ II - blue) at low viscosity than with irregurlarly shaped particles (type I - red)
- Table 1 : Selection of thermally conductive fillersEn ligne : https://drive.google.com/file/d/1BW3QEozaFoC1LeCN81DcqdmCp8lkfCAY/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31546
in ADHESION - ADHESIVES + SEALANTS > Vol. 15, N° 3/2018 (2018) . - p. 18-22[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20502 - Périodique Bibliothèque principale Documentaires Disponible Heat transfer with plastics versus metals / Tobias Epple in KUNSTSTOFFE INTERNATIONAL, Vol. 111, N° 6 (2021)
[article]
Titre : Heat transfer with plastics versus metals : Which fillers are best suited for thermally conductive plastics, and how they can help replace metals Type de document : texte imprimé Auteurs : Tobias Epple, Auteur Année de publication : 2021 Article en page(s) : p. 41-43 Langues : Anglais (eng) Catégories : Charges (matériaux)
Matières plastiques -- Additifs
Métaux -- Suppression ou remplacement
Polyamide 6
ThermocinétiqueIndex. décimale : 668.4 Plastiques, vinyles Résumé : For many components, the use of metal-replacing plastics is an attractive possibility e. g. to save weight and benefit from enhanced design freedom. In various applications, however, the thermal conductivity of the polymers is of equal importance. There are different additives that can be used to enhance this property. In the development of two polyamide families, Domo Engineered Materials investigated which of those additives are especially useful to this end, and applied Light Flash Analysis to examine the materials. Note de contenu : - Two additives ahead of the rest
- Part geometry determines thermal conductivity
- Two measuring methods, one device
- Metals often over-designed
- Two case stories
- Figure : By way of adapting the specimen, the LFA 467 HyperFlash device from Netzsch enables both through-plane and in-plane TC measuring
- Fig. 1 : In-plane thermal conductivity measuring of PA6 with various different fillers: the thermal conductivity (TC) depends on the additive. In some cases it rises considerably at an additive content of 40 % or higher
- Fig. 2 : Through-plane thermal conductivity measuring of PA6 with various different fillers: boron nitride and graphite deliver the best values
- Fig. 3 : Combined results of in-plane and through-plane thermal conductivity measuring: isotropic materials show TC values on the bisector of the quadrant. The TC values of anisotropic materials are far away from the axis. Therefore, proper material selection must not only take the TC value in consideration, but also the part geometry
- Fig. 4 : By way of adapting the specimen, the LFA 467 HyperFlash device from Netzsch enables both through-plane and in-plane TC measuring
- Fig. 5 : Example of heat transfer through the heat sink of an LED: the heat (T2) on surface A passes through the heat sink (heat flow Q) and can then dissipate to the environment. The difference between T1 and T2 results in the thermal conductivity (h)
- Table : Comparison of thermal conductivities of plastics and metal: the higher the thermal conductivity of the material, the smaller the difference in temperature between both pointsEn ligne : https://drive.google.com/file/d/1dtsdpVbwWksFJP2uhQLGbFYRAGCmWf2F/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36178
in KUNSTSTOFFE INTERNATIONAL > Vol. 111, N° 6 (2021) . - p. 41-43[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22867 - Périodique Bibliothèque principale Documentaires Disponible High heat performance / Iain Montgomery in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 198, N° 4521 (02/2008)
[article]
Titre : High heat performance Type de document : texte imprimé Auteurs : Iain Montgomery, Auteur ; Marcel Verhagen, Auteur Année de publication : 2008 Article en page(s) : p. 39-40 Langues : Anglais (eng) Catégories : Charges (matériaux)
Ether de polyphénylène
PolyamidesUn polyamide est un polymère contenant des fonctions amides -C(=O)-NH- résultant d'une réaction de polycondensation entre les fonctions acide carboxylique et amine.
Selon la composition de leur chaîne squelettique, les polyamides sont classés en aliphatiques, semi-aromatiques et aromatiques. Selon le type d'unités répétitives, les polyamides peuvent être des homopolymères ou des copolymères.
Revêtements -- Propriétés thermiques
Revêtements poudreIndex. décimale : 667.9 Revêtements et enduits Résumé : There is an emerging technology, which delivers conductivity plus high heat performance for the coating of plastics.
Powder coating is a fast-growing technology due mainly to its enviromental benefits, particularly the elimination of solvents and related compounds that are emitted into the air in conventional liquid paint. Powder coating has traditionally been used with metal substrates ; however, the need for greater design freedom has led to industry demand for technologies suitable for plastic substrates.
Lightweigh, high-performance and adaptable plastics offer many advantages over metals in applications ranging from mobile phones and TVs to automotive body panels and tractor hoods.
The challenge has been finding successful approaches to the key issues of powder coating these materials : conductivity to attract the coating and high heat performance to withstand the cure cycle. There have been three majors paths to this goal.Note de contenu : - Reaching the objectives
- Design freedom
- Solving drawbacksEn ligne : https://drive.google.com/file/d/1Mo0e4RJwFXHWbY8_WUXqMzhGKJ18qGFq/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27256
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 198, N° 4521 (02/2008) . - p. 39-40[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 010094 - Périodique Bibliothèque principale Documentaires Disponible High performance alkyd paints based on platy kaolin for corrosion protection of steel / Hassan Salah Aly Emira in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 2 (03/2013)
[article]
Titre : High performance alkyd paints based on platy kaolin for corrosion protection of steel Type de document : texte imprimé Auteurs : Hassan Salah Aly Emira, Auteur Année de publication : 2013 Article en page(s) : p. 199-208 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosion
Carbone
Charges (matériaux)
Kaolin
Métaux -- Revêtements protecteurs
Pigments
Polyalkydes
Revêtements
Traitement thermiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : Calcination of kaolin presents an easy route to obtain high performance and eco-friendly anticorrosive filler. The objective of the present work was to prepare a new ecologically friendly inorganic filler, based on thermal treatment of kaolin to be used as an anticorrosive. This work studied the corrosion protection of medium oil-modified alkyd paints based on thermally treated kaolin at different temperatures. Paints were formulated with different pigment volume concentrations (PVCs) and critical pigment volume concentrations (CPVCs). The prepared paints were formulated with increasing content of kaolin, with PVC ranging from 10 to 30%. The physical and chemical properties of kaolin were evaluated at different temperatures. Particle shapes of thermally treated kaolin were characterized using scanning electron microscopy. The physico-mechanical properties of dry films, water vapor transmission and their corrosion properties using accelerated laboratory corrosion test were tested. The thermal treatment of kaolin enhanced both the oil absorption and the alkalinity. This led to alkyd results in saponification and consequently passivation of the substrate. Good wetting with alkyd resin gave homogeneous films without defects which resisted water and oxygen permeation and protected steel against corrosion. The results revealed that thermally treated kaolin at 400°C was the best at protecting steel substrates for all PVCs. Note de contenu : - EXPERIMENTAL : Materials - Thermally treated kaolin preparation - Characterization - Paint preparation and application - Physical and mechanical tests - Corrosion accelerated test
- RESULTS AND DISCUSSION : Pigment evaluation - Scanning electron microscope (SEM) analysis - Water vapor transmission (WVT) - Corrosion test results of paint films after immersion in 3.5% salt solutionDOI : 10.1007/s11998-012-9434-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9434-6.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18238
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 2 (03/2013) . - p. 199-208[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14920 - Périodique Bibliothèque principale Documentaires Disponible 15125 - Périodique Bibliothèque principale Documentaires Disponible 15592 - Périodique Bibliothèque principale Documentaires Disponible PermalinkHigh-performance natural rubber/graphene composites from a uniquely designed physical and chemical hybrid-network / B.-L. Yu in INTERNATIONAL POLYMER PROCESSING, Vol. XXXV, N° 2 (05/2020)
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PermalinkHighly improved UV-shielding and mechanical properties of UV-curable epoxy acrylate nanocomposites by incorporating functionalized aramid nanofibers / Ying Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 1 (01/2024)
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