Dépouillements

Examining the efficiency of titanium dioxide in matt paints and methods of obtaining optimal dry opacity without sacrificing wet hide / Paul Dietz in SURFACE COATINGS INTERNATIONAL, Vol. 106.5 (09-10/2023)  

[article]  inSURFACE COATINGS INTERNATIONAL > Vol. 106.5 (09-10/2023) . - p. 342-348 Titre : Examining the efficiency of titanium dioxide in matt paints and methods of obtaining optimal dry opacity without sacrificing wet hide Type de document : texte imprimé Auteurs : Paul Dietz, Auteur Année de publication : 2023 Article en page(s) : p. 342-348 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dioxyde de titane Dispersions et suspensions Extendeurs Formulation (Génie chimique) Opacifiants Réflectance Revêtements (produits chimiques):Peinture (produits chimiques) Index. décimale : 667.2 Colorants et pigments Résumé : Titanium dioxide (TiO₂) pigment has celebrated over 100 years of commercial manufacture and for most of that time it has been the primary white pigment, providing whiteness, brightness and opacity to paints, coatings, plastics, inks, paper and many other applications. The terms hiding, hide and opacity tend to be used interchangeably in the coatings industry: hiding power and opacity are defined in the standard way as ‘the ability of a substance or coating to obscure a substrate of contrasting colour’. If a coating contains small particles, light passing through the coating can be internally reflected and diffracted at the interfaces between particles and polymer medium, preventing the light reaching the underlying substrate. This light scattering phenomenon is directly influenced by the refractive index of the different phases through which the light passes. In essence, the larger the difference between the refractive index of the pigment/extender and the continuous phase medium, the greater will be the scattering of light. Titanium dioxide’s high refractive index, carefully controlled physical properties and relative inertness make it the first choice when light scattering is required, although many see TiO₂ as a ‘necessary evil’ and a costly formulation ingredient. Where the highest levels of wet opacity are desired, TiO₂ outperforms all other pigments and extenders. Note de contenu : - Comparing the wet hide performance of TiO2 and extenders - TiO2 dispersion in wet and dry films - Comparison of the paints through simple statistical analysis - Table 1 : Reflectance over black (Rb) values obtained for standard paint wet film - Table 2 : Paint performance comparison of standard paint and composite pigment fomulations En ligne : https://drive.google.com/file/d/1YGuhO2LBSPZlSsuRKQ3cC74ZkRGTAGgO/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40021 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
24277	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Coil coating and the road to carbon neutrality / Terry Goodwin in SURFACE COATINGS INTERNATIONAL, Vol. 106.5 (09-10/2023)  

[article]  inSURFACE COATINGS INTERNATIONAL > Vol. 106.5 (09-10/2023) . - p. 384-389 Titre : Coil coating and the road to carbon neutrality Type de document : texte imprimé Auteurs : Terry Goodwin, Auteur Année de publication : 2023 Article en page(s) : p. 384-389 Langues : Anglais (eng) Catégories : Coil coatings Gaz à effet de serre -- Réduction Neutralité carbone Revêtements -- Industrie -- Aspect de l'environnement:Peinture -- Industrie -- Aspect de l'environnement Index. décimale : 667.9 Revêtements et enduits Résumé : The unusual weather patterns across Europe during the summer of 2023 served as a timely reminder of the need to address the so-called climate emergency. The unusually hot weather reinforced the call for action from the UN Secretary-General António Guterres at COP27, in late 2022. He stated1: “The world still needs a giant leap on climate ambition. The red line we must not cross is the line that takes our planet over the 1.5-degree temperature limit.” The primary means for achieving this target is a significant reduction in carbon dioxide emissions from the burning of fossil fuel in the coming decades. But what exactly does this mean for manufacturing industry in Europe and the UK ? The European objective, clearly articulated in the EU Green Deal, is to achieve zero carbon dioxide emissions by 2050. European Industry is tasked with reducing their CO₂ emissions by at least 55% as compared to 1990, by 2030. The UK was the first major economy to make net zero a legally binding target and the government’s ambition, as defined in the document ’Net Zero Strategy : Build Back Greener‘2, is to reduce CO₂ emissions by 68% by 2030 and a 78% reduction in emissions by 2035 on 1990 levels. This is a more ambitious target than the EU and predicated on the belief that decarbonisation of the economy will present many opportunities for business growth and employment. These high-level targets and aspirations have been taken up by UK manufacturing with many companies defining their own objectives and roadmaps to zero carbon or carbon neutrality. Coil coating is no different to many other manufacturing activities and this paper describes how the decarbonisation challenge is being addressed by the industry and how it is being turned into reality at Tata Steel’s coil coating business at Shotton in North Wales. Note de contenu : - The coil coating value chain - Scope 1, 2, 3 and 4 emissions - CO2 footprint of a coil coating line - Scope 3 - reducing the CO2 footprint of the steel substrate - Scope 1 - changing the coating proces - Scope 3 - reducing the CO2 footprint of the organic coating - Case study - coil coating at Tata Steel's Shootton site - Carbon footprint - Products and services - Protect biodiversity - Material efficiency En ligne : https://drive.google.com/file/d/12m0nm5kUwXaiYVCwBfFN9YwzIJfTN7Bx/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40022 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
24277	-	Périodique	Bibliothèque principale	Documentaires	Disponible