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Confocal Raman microscopy study of the melamine distribution in polyester–melamine coil coating / Wanrui Zhang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 6, N° 3 (09/2009)
[article]
Titre : Confocal Raman microscopy study of the melamine distribution in polyester–melamine coil coating Type de document : texte imprimé Auteurs : Wanrui Zhang, Auteur ; Chris Lowe, Auteur ; Ray Smith, Auteur Année de publication : 2009 Article en page(s) : p. 315-328 Note générale : Bibliogr. Langues : Américain (ame) Tags : Coil coating Melamine enrichment Confocal Raman microscopyhttp://download.springer.com/static/pdf/925/art%253A10.1007%252Fs11998-008-9136-2.pdf?originUrl=http%3A%2F%2Flink.springer.com%2Farticle%2F10.1007%2Fs11998-008-9136-2&token2=exp=1464962484~acl=%2Fstatic%2Fpdf%2F925%2Fart%25253A10.1007%25252Fs11998-008-913 Index. décimale : 667.9 Revêtements et enduits Résumé : Hexamethoxymethylmelamine, a common crosslinker used in combination with polyester resins to prepare thermosetting coatings, can self-condense during curing and in theory build up regions with high crosslink density (melamine enrichment). This distribution may affect such properties as the "local" glass transition temperature and structural heterogeneity and thereby modify formability, stain resistance, and weatherability. The self-condensation regions have not previously been observed in detail so their distribution in the film is unclear. Confocal Raman microscopy (CRM) has been used to characterize the melamine distribution in three polyester–melamine paint systems: one clear and two pigmented coil coatings. Both the surface mapping and depth profiling features of CRM were used to perform a 3D analysis. The depth profiling of the clear coating was performed in a nondestructive way, but due to the opaque nature of the pigments, cross sections of the pigmented coatings were prepared in order to facilitate the analysis of the melamine distribution through the film thickness. Melamine-enriched zones were found on the surfaces of all three samples. They appeared to be approximately spherical with diameters of around 5 µm. It was also observed from the cross sections that the melamine-enriched zones appeared as "particles" distributed randomly through the coating. The Raman spectra collected at these regions show significantly higher triazine ring band intensity. All of these findings confirm the hypotheses constructed over the past 20–30 years. DOI : 10.1007/s11998-008-9136-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-008-9136-2.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=6112
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 6, N° 3 (09/2009) . - p. 315-328[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 011503 - Périodique Bibliothèque principale Documentaires Disponible Going green : making reality match ambition for sustainable coil coatings / Neelam Siyab in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 4 (07/2016)
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Titre : Going green : making reality match ambition for sustainable coil coatings Type de document : texte imprimé Auteurs : Neelam Siyab, Auteur ; Sven Tenbusch, Auteur ; Susan Willis, Auteur ; Chris Lowe, Auteur ; James Maxted, Auteur Année de publication : 2016 Article en page(s) : p. 629-643 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Biopolymères
Coil coatings
Durée de vie (Ingénierie)Index. décimale : 667.9 Revêtements et enduits Résumé : The European Commission has launched a €79 billion research and innovation program with the aim of bringing Europe to the forefront of bio-sustainable material research and development and encouraging activities which contribute to the EU’s stated sustainability strategies. This is creating exciting opportunities as new, more sustainable raw materials become available for use in many different industries including coatings for pre-painted applications. This article focuses on one sustainability approach—the framework for strategic sustainable development highlighting not only long-term goals for fully sustainable coil coatings but describing various pathways currently open for sustainable development of coil coatings. It also describes some of the general challenges formulators face trying to reduce dependence on petroleum-based and high environmental impact raw materials. Two examples are used from coatings’ R and D to illustrate these points. Analysis of weathering of bio-based exterior durable products by a variety of techniques is described. Techniques such as AFM, CFM, and PAS-FTIR have been chosen to compliment the traditional assessment techniques for weathered coatings, as a means to understand the links between macro-changes in topography and appearance with the micron-scale physical and chemical changes both on the surface and in the bulk of the exposed film. This work has demonstrated that by careful selection of bio-based monomers, coatings can be formulated with equivalent durability performance to existing petroleum-based coatings at the same time as introducing more sustainable content into the paint film. The second example is an evaluation of the structure—property relationships of bio-sustainable resin monomers aimed at the white goods market, where a high degree of formability and resistance to staining and marking is required. Experimental design-based studies show potential to reduce petroleum-based aromatic acid content without a compromise on film Tg, among other properties. Note de contenu : - SUSTAINABILITY CONCEPTS FOR COIL COATINGS
- COIL COATINGS : A SUSTAINABLE VISION
- COIL COATINGS : BASELINE MAPPING
- COIL COATINGS : CREATIVE SOLUTIONS AND PRIORITIES : Use of renewable or recycled solvents - Use of renewable or recycled pigments - Use of renewable or bio-based additives - Use of recycled or bio-based polymers - Quantification of sustainable coatings - Costs and economics of sustainable coatings
- OPPORTUNITIES FOR RENEWABLE BIO-BASED RESINS
- EXPERIMENTAL : TWO ILLUSTRATIONS OF DEVELOPMENT OF BIO-BASED COATINGS FOR COIL COATING APPLICATIONS : Development of exterior durable bio-based resins - A bio-based resin for domestic appliance applicationsDOI : 10.1007/s11998-015-9766-0 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9766-0.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26744
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 4 (07/2016) . - p. 629-643[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18223 - Périodique Bibliothèque principale Documentaires Disponible Sustainable coil coatings / Chris Lowe in SURFACE COATINGS INTERNATIONAL, Vol. 106.3 (05-06/2023)
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Titre : Sustainable coil coatings Type de document : texte imprimé Auteurs : Chris Lowe, Auteur Année de publication : 2023 Article en page(s) : p. 184-194 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Biopolymères
Catalyseurs
Coil coatings
Développement durable
Formulation (Génie chimique)
Matériaux -- Propriétés
Phtalates -- Suppression ou remplacement
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.
Polyesters
Polymères -- Propriétés mécaniques
Réticulation (polymérisation)
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Pre-finished metal, be it steel or aluminium, is commonly used globally. The majority is used as façades and roofs of buildings, but other uses include garage doors, caravans, gutters and domestic appliances. The pre-finishing takes place on lines consisting of a coil of relatively thin metal (commonly around 0.6 mm thick for steel and between 1 and 1.2m wide) that can run continuously. The coil of thin metal can have a mass of 20 tonnes for steel and be upwards of 3,000 m long. Hence, the alternative name for prefinishing is coil coating. Note de contenu : - Current technology and how it can be made more sustainable
- Structure property relationships
- Dependence of mechanical properties on structure in detail
- A bio-sourced alternative to phthalates
- Phthalates from sugar
- Catalysts for polyester synthesis
- Crosslinking that avoids residual formaldehyde
- Tackling the thorny issue of the need for high temperature curing
- Table 1 : Bio-sourced diols and diacids and the materials from which they are derived
- Table 2 : Composition and property data of different polyesters
- Table 3 : Summary of resin properties and mechanical performance for a range of polyesters synthesised from isosorbide and FDCA
- Table 4 : Characteristics of bio-sourced polyamides formed
- Table 5 : Standard paint formulation
- Table 6 and 7 : Energy required to heat paint to 220°C – Assumptions
- Table 8 : Data used to calculate the energy required to heat, dry and cure solventborne coil coatings
- Scheme 1 : Reaction detailing the synthesis of phthalic anhydrides from furans and maleic anhydride
- Scheme 2 : 3-Methylphthalic anhydride
- Scheme 3 : Polyamide derived from pimelic acid, butane-1,4-diamine and isoidide diaminePermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39483
in SURFACE COATINGS INTERNATIONAL > Vol. 106.3 (05-06/2023) . - p. 184-194[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24074 - Périodique Bibliothèque principale Documentaires Disponible