An evaluation of leading distemper paints and their cost optimisation using opacity pigments / Smita Shelar in PAINTINDIA, Vol. LXIX, N° 9 (09/2019)  

[article]  inPAINTINDIA > Vol. LXIX, N° 9 (09/2019) . - p. 86-90 Titre : An evaluation of leading distemper paints and their cost optimisation using opacity pigments Type de document : texte imprimé Auteurs : Smita Shelar, Auteur ; Andy White, Auteur ; Paul Dietz, Auteur Année de publication : 2019 Article en page(s) : p. 86-90 Langues : Anglais (eng) Catégories : Coût -- Contrôle Diluants Dioxyde de titane -- Suppression ou remplacement Dip-coating Formulation (Génie chimique) Opacité (optique) Pigments Index. décimale : 667.6 Peintures Résumé : Distemper paints have long been associated with and play an important part of the Indian paint market. Designed as economical paints that can refreshed frequently to help keep building walls clean and bright, many different brands are available from small local producers to the largest of multinational companies. This evaluation looked at six commercially available Distemper products, five from the leading, multination brands and one from a local (Mumbai) supplier. The chosen paints were all purchased from locations within Mumbai in September 2018. The paints were tested for their application and optical properties and the results compared to give a ranking of performance. The same paints were then evaluated, by various analytical techniques, to determine their approximate composition including titanium dioxide type and level and extender types and levels. Using the reverse-engineered formulations, the paints were then tested with various levels of FP-Pigments Opacity pigment replacing the titanium dioxide pigment. Note de contenu : - Part 1 : Comparison of the six commercial paints - Part 2 : Analysis and reverse engineering of the six commercial paints - Part 3 : Cost efficient distemper formulation with FP-pigments opacity pigments - Table 1 : Suggested let-down levels and effect on weight and volume solids - Table 2 : XRF data for main elemental composition - Table 3 : Pigment and extender type in each paint - Table 4 : Approximate pigment and extender content - Table 5 : Generic starting point formulation - Fig. 1 : Contrast ratio at 150µm wet film thickness - all paints diluted as recommended - Fig. 2 : Contrast ratio at a spreading rate of 15m2/l - all paints diluted as recommended - Fig. 3 : Spreading rate for a contrast ratio of 98% - all paints diluted as recommended - Fig. 4 : Contrast ratio vs dry film thickness - all paints diluted as recommended - Fig. 5 : SEM and approximated composition of Paint 1 - Fig. 6 : Chart of replacement ratio vs initial TiO2 loading En ligne : https://drive.google.com/file/d/1uXVGPKkbuKXBix6AS9Vk9LpexZ-wsaac/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33075 [article]

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Cost-effective solutions / Paul Dietz in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 199, N° 4543 (12/2009)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 199, N° 4543 (12/2009) . - p. 26-28 Titre : Cost-effective solutions Type de document : texte imprimé Auteurs : Paul Dietz, Auteur Année de publication : 2010 Article en page(s) : p. 26-28 Langues : Anglais (eng) Tags : Peinture  Revêtement  Charges  minérales  Kaolin  Carbonate  calcium  Agent  mattant  UV  Propriété  film  Mica Index. décimale : 667.9 Revêtements et enduits Résumé : Cost-effective solutions to meet performance requirements for the next generation of coatings. En ligne : https://drive.google.com/file/d/1Fa6USNrTSNCmbL6B11mS4189yRSf_HqJ/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8460 [article]

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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]

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Spacing for better effects / Paul Dietz in EUROPEAN COATINGS JOURNAL (ECJ), N° 7-8/03 (07-08/2003)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 7-8/03 (07-08/2003) . - p. 14-20 Titre : Spacing for better effects : Influence of fine particle size extenders and entrapped air on utilisation of TiO2 in emulsion paints Type de document : texte imprimé Auteurs : Paul Dietz, Auteur Année de publication : 2003 Article en page(s) : p. 14-20 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.6 Peintures Résumé : A number of interactions can occur between titanium dioxide and mineral extenders, which can effect a range of paint properties, such as rheology, durability, opacity and scrub resistance, some of which are not fully appreciated. This paper look at one of these interactions, TiO2 spacing by extenders, and the effect it has on the optical properties and scrub resistance of emulsion paints. Evaluation of the possible TiO2 savings suggest that, while small reductions (ca. 5%) in TiO2 loadings could be made with flash calcined extenders in certain paint systems, implementing greater savings, as suggested by the manufacturers, led to detrimental effects on several other important paint properties. Note de contenu : Fine particle size extenders save TiO2 Improving TiO2 use through spacing Pvc ladder with varying extender volume concentration Extender flocculating performs worse Extender with air voids improves opacity Ranking of extenders TiO2 reductions of 20% are possible Replacing TiO2 gives poor scrubs resistance Entrapped air effects on TiO2 utilisation Opacity increases if more air is entrapped. En ligne : https://drive.google.com/file/d/1FuqWzomdsXx4eRIi5B-OpU0qOOfAp6Pw/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9448 [article]

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Tio2 efficiency in coatings : products and techniques for opacity optimisation / Paul Dietz in SURFACE COATINGS INTERNATIONAL, Vol. 99.2 (04-05/2016)  

[article]  inSURFACE COATINGS INTERNATIONAL > Vol. 99.2 (04-05/2016) . - p. 91-96 Titre : Tio2 efficiency in coatings : products and techniques for opacity optimisation Type de document : texte imprimé Auteurs : Paul Dietz, Auteur Année de publication : 2016 Article en page(s) : p. 91-96 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dioxyde de titane Opacité (optique) Index. décimale : 667.9 Revêtements et enduits Résumé : For those who have been in the coatings industry long enough, the rollercoaster ride of TiO2 price comes as no surprise. That said, the day of an even 10-year cycle in price have changed to shorter periods of high price (often painfully high) followed by longer periods of relatively low price (painfull for the suppliers). Even when relatively "cheap", TiO2 continues to be one of the most expensive raw materials in a coating, so ensuring that the pigment is used correctly and efficiently remains a crucial busines objective. Note de contenu : - TiO2 SELECTION - PIGMENT DISPERSION : Solvent systems - Water-based systems - The role of pH and surface charge - Dispersants and dispersant requirements - Physical dispersion - COST-EFFECTIVE OPACITY - ENGINEERED COMPOSITE TECHNOLOGY - FP-PIGMENTS' OPACITY PIGMENT - TABLES : 1. Points to consider when choosing your TiO2 - 2. Means of achieving cost-effective opacity in coatings - FIGURES : 1. Relative undertone of TiO2 pigments due to pigment crystal size - 2. Example of a mobility curve for an alumin/zirconia treated TiO2 pigment - 3. Effect of pH on dispersion - 4. Dispersant demand curves for anionic and steric stabilisers - 5. Dispersant demand determination for two dispersants - 6. Dispermat dissolver used at FP-pigments - 7. Pigment flocculation due to soluble salt concentration - 8. Pigment flocculation and crowding upon drying - 9. Schematic of pigment crowding by extenders - 10. SEM ans schematic representation of FP-pigments' opacity pigment - 11. Typical performance of the FP-460 opacity pigment in a German DIY matt paint - 12. Comparison of loose blend with composite product - 13. Reduction of the "window" effect when using FP-pigment's composite compared to comparable sized extender - 14. Use of both a functional extender and FP-pigments opacity pigment to reduce TiO2 and improve formulation costs En ligne : https://drive.google.com/file/d/1ixyZYQh7Yy5_9OsyAlI1_BxkRygKWGRP/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26189 [article]

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TiO2 efficiency in coatings : products and techniques for opacity optimisation / Paul Dietz in SURFACE COATINGS INTERNATIONAL, Vol. 100.1 (02-03/2017)  

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