BiVO4-pigments and colour space expansion / Heinrich-Michael Wirlth in EUROPEAN COATINGS JOURNAL (ECJ), N° 3 (03/2019)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 3 (03/2019) . - p. 114-119 Titre : BiVO4-pigments and colour space expansion Type de document : texte imprimé Auteurs : Heinrich-Michael Wirlth, Auteur ; Olaf Schmidt-Park, Auteur Année de publication : 2019 Article en page(s) : p. 114-119 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorimétrie Jaune Pigments hybrides Pigments inorganiques -- Analyse Vanadate de bismuth Index. décimale : 667.2 Colorants et pigments Résumé : Currently the inorganic yellow pigments used most in the paint and coating industry are lead chromate, goethite, nickel/chromium-rutile and bismuth vanadate. The chromaticity coordinates of these pigments are depicted in Fig. 1 as a full tone. Note de contenu : - Colour properties of BiVO4 - Chemical modifications of bismuth vanadates - Combining BiVO4 pigments inorganic orange pigments - BiVO4-hybrid pigments - The way forward - Fig. 1 : Colour space of inorganic yellow pigments (full tone melamine resin system, D65/10°C, CIELab units) - Fig. 2 : Combination of m-Scheelite-ViOV4P2 with inorganic orange pigments (chromaticity in full tone) - Fig. 3 : Remission spectra of different BiVO4/RTZ-orange mixtures (measurements according to paint deliver/full tone) - Fig. 4 : BiVO4-hybrid pigments with different organic yellow/orange pigments (full tone melamine resin system) - Fig. 5 : Development of a* (full tone melamine resin) dependent on the component portion - Table 1 : Properties of BiVO4 pigments - Table 2 : Combination of BiVO4 with the inorganic orange pigment PY 216 - Table 3 : Combination of BiVO4 with the inorganic orange pigment PY 42 - Table 4 : Hybrid pigments based on monocline ViVO4 En ligne : https://drive.google.com/file/d/1YzYpkfx-p7SnNqeUTIcjp8mRff34cMyR/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32024 [article]

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Comparative study of titanium dioxide to improve the quality of finished cosmetic products / Dominika Swiatczak in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 45, N° 3 (06/2023)  

[article]  inINTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 45, N° 3 (06/2023) . - p. 315-328 Titre : Comparative study of titanium dioxide to improve the quality of finished cosmetic products Type de document : document électronique Auteurs : Dominika Swiatczak, Auteur ; Sylwia Belica-Pacha, Auteur ; Anna Zawisza, Auteur ; Aneta Kisielewska, Auteur ; Agata Swiatly-Blaszkiewicz, Auteur ; Bogumila Kupcewicz, Auteur ; Bartosz Bartosewicz, Auteur ; Bartlomiej J. Jankiewicz, Auteur ; Magdalena Malecka, Auteur Année de publication : 2023 Article en page(s) : p. 315-328 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Couleur Dioxyde de titane Ingrédients cosmétiques Pigments inorganiques -- Analyse Index. décimale : 668.5 Parfums et cosmétiques Résumé : - Objective : Titanium dioxide (TiO2) pigments (pure) or with a hydrophobic coating of triethoxycaprylylsilane (TECSi) used in cosmetics. Using different methods, we studied properties of commercially available pure and coated pigment. We determined the elemental composition of pigments that differ in their behaviour in a cosmetic formulation. The significant differences in the coating composition were revealed. - Methods : UV–Vis absorption spectroscopy allowed us to investigate the pigment purity and determined the polymorph form in pigments. FTIR was employed to identify functional groups present in the samples with the modified surface. XRD, DLS, TEM and DCS were applied to characterize particle size and morphology. The experiment of ED-XRF method was used to determine the elemental composition of pigments that differ in their behaviour in a cosmetic formulation. - Results : UV-Vis spectroscopy was used to detect organic pollutants in particular batches, which were not detected in the cases of the tested samples. Solid UV-Vis spectroscopy and XRD revealed which crystalline form of TiO2 is present in pigments. TEM and DLS methods were used to characterize particle size and morphology as well as DCS method, which provide more accurate information about form (separated or clustered particles) of pigments' particles in suspensions. Based on FTIR spectra, the presence of a coating in the raw material was identified, and the tell-tale signal of the silane group. On the contrary, spectroscopy of washed-out product can identify the well or poorly modified pigment. Applying ED-XRF, it turned out that the content of silicon (and consequently of the TECSi) was lower than that declared by the manufacturer. - Conclusion : Our data indicate how we can recognize poorly coated pigments in raw material. The results show that ED-XRF method is nondestructive, effective and fast, hence, can be successfully introduced into preproduction pigment control in cosmetic industry. Note de contenu : - MATERIALS AND METHODS : Materials and its characteristics - UV–vis spectrophotometry in solution and solid - NMR spectroscopy - X-ray powder diffractometry - FTIR spectroscopy - Energy-dispersive X-ray fluorescence (ED-XRF) - Microscope image - DLS-Dynamic light scattering - Transmission electron microscopy - Differential centrifugal sedimentation - RESULTS : UV–vis spectrophotometry - H NMR spectroscopy - Structural Characteristics - FTIR spectroscopy - Energy-dispersive X-ray fluorescence (ED-XRF) - Microscopic image - TEM-Transmission electron microscopy and DLS-dynamic light scattering - DCS-differential centrifugal sedimentation - Table 1 : Composition of raw materials listed in the publication - Table 2 : Composition of triethoxycaprylylsilane (C14H32O3Si) - Table 3 : Content of silicon and TECSi in the tested samples calculated based on the calibration curve DOI : https://doi.org/10.1111/ics.12836 En ligne : https://drive.google.com/file/d/1THkm0Of9SKNx8ZIGyjpC07hMkmc9yEcF/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39563 [article]

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Effect of coating pigment type on paper printability with water-based inks / Arif Ozcan in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 4 (07/2022)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 4 (07/2022) . - p. 1149-1157 Titre : Effect of coating pigment type on paper printability with water-based inks Type de document : texte imprimé Auteurs : Arif Ozcan, Auteur ; Sinan Sonmez, Auteur ; Dogan Tutak, Auteur Année de publication : 2022 Article en page(s) : p. 1149-1157 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Carbonate de calcium Le carbonate de calcium (CaCO3) est composé d'un ion carbonate (CO32-) et d'un ion calcium (Ca2+), sa masse molaire est de 100,1 g/mole. C'est le composant principal du calcaire et de la craie, mais également du marbre. C'est aussi le principal constituant des coquilles d'animaux marins, du corail et des escargots. Encre d'imprimerie Encre en phase aqueuse Formulation (Génie chimique) Kaolin Liants Papier et carton couché Pigments Pigments inorganiques -- Analyse Revêtements en papier Sérigraphie Index. décimale : 667.9 Revêtements et enduits Résumé : Nowadays, the need for papers and cardboards with improved surface properties is increasing with the development of the packaging industry. The improvements made are not only limited to the paper and paper surface, but also environmentalist approaches are exhibited in printing ink. For this purpose, the use of water-based ink tends to become widespread, especially in food packaging. In this study, five different paper coating formulations were prepared using different proportions of precipitated calcium carbonate (PCC) and kaolin pigments. Latex (Acronal S360D) was used as a binder. All prepared coating mixes were applied onto the base paper surface. All coated papers were also subjected to the calendering process. In addition, three different dyestuffs (14, 17, 20%) concentrations of water-based printing inks were prepared. Prints were made by the silk screen printing technique on the calendered-coated papers. The optical and physical properties (roughness, air permeance, paper gloss and printing gloss, contact angle and surface energy) of all papers were measured according to the standards. Paper gloss, print gloss, ΔE00 color differences, contact angles and surface energy measurements were made, and the effects of dye ratio on printing and gloss in water-based inks and coating type suitable for printability were investigated. As a result, papers can be coated and even calendered to achieve better paper surface properties and printability. In the case of printing with water-based inks, better printability properties are obtained by choosing PCC pigmented coated papers. Note de contenu : - Materials - Paper coating formulations - Optical and physical properties of papers - Preparing water-based ink - Printing conditions - Color properties - Table 1 Paper coating formulations - Table 2 The characteristics of the mineral pigments - Table 3 The characteristics of the binder (Acronal S360D) - Table 4 Formulations of water-based printing inks - Table 5 : SEM-EDAX chemical content results of paper samples coated with formulations of different pigment composition - Table 6 : Total surface energy and contact angle values according to ASTM D5946 method - Table 7 : The difference between the color of the papers printed according to the CIE ΔE 2000 euclidean color-difference formula DOI : https://doi.org/10.1007/s11998-021-00593-8 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00593-8.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38043 [article]

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Lead is dead / Mark Ryan in EUROPEAN COATINGS JOURNAL (ECJ), N° 3 (03/2013)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 3 (03/2013) . - p. 74-78 Titre : Lead is dead : Maintain opacity and durability and expand the colour range with new pigment chemistries Type de document : texte imprimé Auteurs : Mark Ryan, Auteur Année de publication : 2013 Article en page(s) : p. 74-78 Langues : Anglais (eng) Catégories : Etain Niobium Le niobium est un élément chimique, de symbole Nb et de numéro atomique 41. Le niobium est un métal brillant gris, ductile qui prend une couleur bleutée lorsqu'il est exposé à l'air à température ambiante pendant une longue période. Les propriétés chimiques du niobium sont presque identiques à celles du tantale. Le métal commence à s'oxyder à l'air au-dessus d'une température de 200 °C. Le minerai pyrochlore (Ca,Na)Nb2O6(OH,F) fournit la majeure partie du niobium produit. Opacifiants Pigments inorganiques Pigments inorganiques -- Analyse Pyrochlore Index. décimale : 667.2 Colorants et pigments Résumé : A new pigment chemistry, niobium tin pyrochlore yellow, has been developed that expands the envelope of durable colours available in paints and coatings. It has the chromaticity and brightness of organic pigments and the opacity and durability of inorganic pigments. The new yellow is complemented by improvements in rutile tin zinc to increase its red value. Together these pigments provide an alternative to lead chromate pigments and expand the envelope of durable colours in the yellow and orange colour space. Note de contenu : - High chroma - Expanding colour envelope - Accelerated weathering tests available En ligne : https://drive.google.com/file/d/1TanV8K5_yxIS9m0S__K2mWohTAU95UP-/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17712 [article]

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Methods of determining the classification of titanium dioxide in accordance with ASTM D476 and recommending its use in waterborne architectural paints / Artur Palasz in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 211, N° 4672 (12/2021)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 211, N° 4672 (12/2021) . - p. 27-35 Titre : Methods of determining the classification of titanium dioxide in accordance with ASTM D476 and recommending its use in waterborne architectural paints Type de document : texte imprimé Auteurs : Artur Palasz, Auteur Année de publication : 2021 Article en page(s) : p. 27-35 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dioxyde de titane Essais (technologie) Pigments inorganiques -- Analyse Produits chimiques -- Classification Index. décimale : 667.2 Colorants et pigments Résumé : Titanium dioxide (TiO2) is the most important white pigment in waterborne architectural paints. Despite the fact that it is one of the most expensive raw materials in the formulation, numerous price fluctuations and turbulences related to changes in the European classification, TiO2 is the most effective pigment providing opacity of white and light shades. In addition to opacity, TiO2 pigments provide a number of other properties appreciated in architectural coatings, depending on its structure, surface treatment and grade according to ASTM D476. In waterborne architectural paints, mainly rutile TiO2 pigments are used, obtained through the sulphate and chloride process with various surface treatments. The anatase variety is not so widely used because of its properties, ie much lower resistance to chalking under the influence of UV radiation. However, so that the selection of TiO2 does not only take place through theoretical considerations, it is necessary to use appropriate tools provided to paint manufacturers to support the selection of the appropriate grade of TiO2. Such tools are research results and case studies for different TiO2 pigments and comparisons between different grades in different formulations. In this article, we will present the basic landscape for the classification of TiO2 pigments for waterborne architectural paints, how to use the classification in the ASTM D476 standard, as well as examples of case studies of practical differences between rutile and anatase, and the results of TiO2 tests in gloss paints, which was introduced in three different dispersion processes. Note de contenu : - TITANIUM DIOXIDE CLASSIFICATION - SELECTION OF TIO2 PIGMENTS - EXPERIMENTAL : Part 1 and 2 - Hiding power - Lightening power and colour tint - Gloss - Whiteness and yellowness - UV exposure (artificial accelerated weathering and lightfastness) - TEST RESULTS : Hiding power - Gloss - Whiteness and yellowness - UV exposure (artificial accelerated weathering and lightfastness) - DISCUSSION OF TEST RESULTS : Hiding power - Lightening power and colour tint - Gloss - Whiteness and yellowness - UV exposure (artificial accelerated weathering and lightfastness) - Table 1 : Classification of TiO2 pigments by ASTM D476 - Table 2 : Classification of TiO2 pigments by 150 591-1 - Table 3 : The range of paint samples prepared for experiments - Table 4 : Test methods used to determine hiding power - Table 5 : UV exposure procedures used to evaluate weather fastness and light fastness - Table 6 : Test results of hiding power - Table 7 : Wet-to-try hiding change test results - Table 8 : Sample preparation scheme for colour tint and lightening test - Table 9 : Evaluation of colour tint and lightening for various grinding method - Table 10 : Evaluation of colour tint and lightening for rutile vs anatase tinted by PBk7 - Table 11 : Evaluation of colour tint and lightening for rutile vs anatase tinted by other colourants - Table 12 : Test results of gloss for samples prepared by mill, dissolver and homogeniser - Table 13 : Test results of gloss for samples rutile vs anatase - Table 14 : Evaluation of whiteness index and yellowness index for samples prepared by various grinding methods - Table 15 : Evaluation of whiteness index and yellowness index - rutile vs anatase - Table 16 : Gloss change after QUV exposure with UVA-340 lamps - Table 17 : Evaluation of chalking after Q-UV exposure with UVA-340 lamps En ligne : https://drive.google.com/file/d/1cJ5n7ab4_smxNb9mpMLLUiBYAtyufW1H/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36787 [article]

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Natural iron oxide (earth colour) deposits in Latvia : an assessment of the possibilities for their use in inorganic pigment manufacturing / Aigards Kokins in COLORATION TECHNOLOGY, Vol. 134, N° 6 (12/2018)  

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Les ocres de Provence : de l'extraction à la toile / Florence Boulc'h in L'ACTUALITE CHIMIQUE, N° 335 (11/2009)  

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Tailor-made pigments / Hendrik Kathrein in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 197, N° 4517 (10/2007)  

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