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Classification of light fastness and weather fastness of orange pigments and studies in waterborne latex paints / Artur Palasz in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 212, N° 4673 (02/2022)
[article]
Titre : Classification of light fastness and weather fastness of orange pigments and studies in waterborne latex paints Type de document : texte imprimé Auteurs : Artur Palasz, Auteur Année de publication : 2022 Article en page(s) : p. 21-26 Langues : Anglais (eng) Catégories : Evaluation
Latex
Orange (couleur)
Photostabilité
Pigments
Résistance aux conditions climatiques
Revêtements en bâtiment
Revêtements en phase aqueuse:Peinture en phase aqueuseIndex. décimale : 667.9 Revêtements et enduits Résumé : The author discusses methods of assessing pigments, in this case orange pigments, in water-based architectural paints as façade paints for exterior and interior applications.
Pigments are an extremely important group of raw materials used in the production of architectural paints. Both in the form of dry pigments and pigment concentrates (colourants), they allow for obtaining coloured coatings, which not only decorate our interiors, fences and façades, but also act as safety indicators, eg in paints for marking traffic routes or warning symbols. From an operational and economic point of view, their durability is extremely important, and knowledge about their durability to weather conditions is needed to select them for various applications, ranging from exposure to solar radiation, to operation at high temperatures. Due to the susceptibility of pigments as chemical compounds to changes in their properties, which are usually manifested in architectural paints, they must be properly classified and characterised for their proper use in formulations.
In the article, I focused on the classification of pigments that exist on the market and their resistance to light (lightfastness) and weather factors (weatherability), as well as on case studies of the exposure of three different organic orange pigments using various methods of exposure to artificial (laboratory) light sources and accelerated action of weather conditions. The article is dedicated to the methods of assessing pigments, in this case orange pigments, in water-based architectural paints as façade paints for external application, fade due to weather conditions and for interior paints fade due light exposure through window glass. This paper also exemplifies the resistance to such factors under simulated laboratory conditions, in the form of data that the paint industry needs to develop weatherability and Iightfastness stable latex paint coatings for both indoor and outdoor use. These data should usually be included in guide formulations and start point formulations, which significantly accelerate R&D work in paint production companies, and above all, make a decision on whether to accept a given raw material for testing.Note de contenu : - LIGHTFASTNESS TESTS OF PIGMENTS : Exposure methods according to ASTM D4303 - Assessment of colour changes and classification of pigments
- MARKET REQUIREMENTS FOR PAINTS AND COATINGS : UV exposure
- EXPERIMENTAL : Pigments for studies - Paints for studies
- TESTING PROGRAMME
- TEST RESULTS
- DISCUSSION OF TEST RESULTSEn ligne : https://drive.google.com/file/d/1ugJlgaQPeYJBq35jmlei36qMdNELdT3L/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36971
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 212, N° 4673 (02/2022) . - p. 21-26[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23211 - Périodique Bibliothèque principale Documentaires Disponible Differences between the grinding process of TiO2 pigments glossy acrylics / Artur Palasz in COATINGS TECH, Vol. 19, N° 8 (10/2022)
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Titre : Differences between the grinding process of TiO2 pigments glossy acrylics Type de document : texte imprimé Auteurs : Artur Palasz, Auteur Année de publication : 2022 Article en page(s) : p. 44-52 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Brillance (optique)
Dioxyde de titane
Dispersions et suspensions
Essais (technologie)
Essais accélérés (technologie)
Formulation (Génie chimique)
Fragmentation
Opacifiants
Pigments inorganiques
Polyacryliques
Pouvoir éclaircissant
Revêtements en bâtiment:Peinture en bâtiment
Revêtements en phase aqueuse:Peinture en phase aqueuseIndex. décimale : 667.9 Revêtements et enduits Résumé : Titanium dioxide is the most important white pigment in waterborne architectural paints. Even though it is one of the most expensive raw materials in the formulation, subject to numerous price fluctuations and turbulence related to changes in the hazard classification, titanium dioxide is the most effective pigment for providing opacity to white and light shades.
In addition to opacity, the structure, surface treatment, and grade of titanium dioxide pigments are valued in architectural coatings, as described in ASTM D476.
Titanium dioxide in waterborne paints is used in architectural paints, on wood, and on metal and other substrates. Thanks to its very high opacity, it has replaced zinc oxide and barium sulphate in many applications.
However, to maximize the effectiveness of titanium dioxide pigment in a formulation, it must be incorporated into the paint in a specific manner. This involves the deagglomeration of the titanium dioxide particles; in its commercial form, titanium dioxide is a powder with aggregated and agglomerated particles.Note de contenu : - TIO2 CLASSIFICATION
- DISPERSING AND GRINDING : Surface treatment - Wetting - Mechanical deagglomeration - Stabilization against flocculation
- EXPERIMENTAL : Titanium dioxide for studies - Formulation and lab-scale paint preparation - Test results - Dry hiding power - Wet-to-Dry Hiding Change (WDHC) - Lightening power - Gloss - Artificial accelerated weathering exposure
- Table 1 : Classification of titanium dioxide pigments according to ASTM D476
- Table 2 : Classification of titanium dioxide pigments according to ISO 594-1
- Table 3 : Titanium dioxide for the case studies
- Table 4 : Formulation of titanium dioxide slurry
- Table 5 : Formulation of acrylic gloss paint for case studies
- Table 6 : Formulation constants
- Table 7 : Wet-to-dry hiding change, test results
- Table 8 : Lightening power and color tint test results
- Table 9 : The course of exposure of coatings in the UV chamberEn ligne : https://drive.google.com/file/d/19_FYo9RCuCzeNHkJnwB5o_39nLO2y0nD/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38296
in COATINGS TECH > Vol. 19, N° 8 (10/2022) . - p. 44-52[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23674 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Eliminating spatter : The benefits of using high-performance cellulose derivatives (hydrophobically modified HEC and microfibrillated cellulose) in latex paints for architectural applications Type de document : texte imprimé Auteurs : Artur Palasz, Auteur Année de publication : 2023 Article en page(s) : p. 32-36 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cellulose -- Dérivés
Epaississants
Latex
Projection de matériaux
Revêtements en bâtiment:Peinture en bâtiment
Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- Additifs
RhéologieIndex. décimale : 667.9 Revêtements et enduits Résumé : Many years ago, cellulose derivatives served as the basic binders for solvent-borne nitrocellulose paints, but nowadays much more advanced cellulose derivatives are acting as key additives for high-performance water-borne latex paints for architectural applications. Note de contenu : - Advanced modifications and microfibrils
- Rheological properties
- Imparting the desired viscosity
- Viscosity retention after tinting
- Preventing syneresis with MFC
- Preventing spattering with HMHEC
- Eliminating mudcracking with MFC
- Improving film building with MFCEn ligne : https://drive.google.com/file/d/1gWbY5v_n_mCRkhd-lyPejUq1ylasBXD_/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38736
in EUROPEAN COATINGS JOURNAL (ECJ) > (01-02/2023) . - p. 32-36[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23833 - Périodique Bibliothèque principale Documentaires Disponible 23831 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Getting the ratio right : Case studies of latex paints formulations containing different pigment volume concentrations Type de document : texte imprimé Auteurs : Artur Palasz, Auteur Année de publication : 2022 Article en page(s) : p. 46-51 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Brillance (optique)
Carbonate de calciumLe 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.
Charges (matériaux)
Concentration pigmentaire volumique
Formulation (Génie chimique)
Latex
Opacifiants
Revêtements:PeintureIndex. décimale : 667.9 Revêtements et enduits Résumé : Latex paint formulations nearly always contain ground calcium carbonate in two particle sizes. Yet, the particle size ratio in starter formulations usually differs. What does this ratio depend on and how should it be chosen ? Note de contenu : - Ground calcium carbonate
- Variants "2" and "5"
- Experimental
- 1ST stage : Extreme ratios yield greatest differences
- 2nd stage : Dirt pick-up, sheen and contrast ratio
- Least dirt pick-up for PVC/CPVC
- Sheen : Seeking dead matt
- Contrast ratio : no significant influence exerted by particle size
- Table 1 : Characteristics of paints prepared for the 1st stage of the study
- Table 2 : Characteristics of paints prepared for study in the 2nd stage
- Table 3 : Sheen on Penopac charts
- Table 4 : Hiding power at fixed spreading rateEn ligne : https://drive.google.com/file/d/1desmxlMQaf7E6fAsqA0WMhpocUenvqqL/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38029
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 9 (09/2022) . - p. 46-51[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23594 - Périodique Bibliothèque principale Documentaires Disponible How to characterise kaolin so that you want to use it in your formulation and buy it from the supplier / Artur Palasz in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 212, N° 4675 (06/2022)
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Titre : How to characterise kaolin so that you want to use it in your formulation and buy it from the supplier Type de document : texte imprimé Auteurs : Artur Palasz, Auteur Année de publication : 2022 Article en page(s) : p. 33-38 Langues : Anglais (eng) Catégories : Brillance (optique)
Brillance (optique) -- Mesure
Caractérisation
Essais (technologie)
Formulation (Génie chimique)
Kaolin
Opacifiants
Revêtements -- Additifs:Peinture -- AdditifsIndex. décimale : 667.9 Revêtements et enduits Résumé : Each latex paint formulator, both experienced and novice, has encountered various kaolins in start point formulations, which are usually an additional filler, as a titanium dioxide substitution, sheen and gloss modifier of paints in the middle range of pigment volume concentration, or simply as an additional filler present in a formulation without indicating its special property to be added to it. For the latter reason, usually formulators of latex paints, not having sufficiently presented benefits of using a specific kaolin in the formulation, decide to replace it with other types of kaolin. Often, such a substitution is dictated by economic decisions, as the kaolin present in the stripe formulation may be more expensive than the one currently available for the production of current latex paints or requires an order as it has not been used in a given paint factory so far. Often, the lack of appropriate case studies showing the benefits of using this particular kaolin result in modification of the starting recipe in the direction of deteriorating the properties of the coatings, e.g. in terms of opacity, sheen and gloss, etc. Of course, such modifications are carried out mostly unconsciously, because the formulator intends to replace it with a different kaolin, which is assumed to be a similar kaolin that is currently used in production recipes. Note de contenu : - FACTORS IMPACTING CRITICAL PERFORMANCE FEATURES : Appearance of dry coating - Change from wet hiding to dry hiding - Hiding power at fixed spreading rate - Enhancing sheen and gloss when dry rubbing
- KAOLIN USED IN THE STUDIES
- EXPERIMENTAL : Slurries preparation - Paint formulations
- TEST RESULTS : Appearance of dry coating - Wet-to-dry change
- Hiding power at fixed spreading rate - Burnish resistance
- Table 1 : Characteristics of akolins used in the case studies
- Table 2 : Base formulation of paints prepared with slurries
- Table 3 : Formulation constants for paints based on all kaolins used in the preparation of paints
- Table 4 : Summary of the results of sheen and gloss measurements with the requirements of EN 1330 and MPI
- Table 5 : Hiding power test results according to ISO 6504-3En ligne : https://drive.google.com/file/d/1AIggtzEVNl1x3mg9_X9NtwIUP2c_goyC/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37784
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 212, N° 4675 (06/2022) . - p. 33-38[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23475 - Périodique Bibliothèque principale Documentaires Disponible Hydrophobically modified hydroxyethyl cellulose (hmHEC) - effective low-shear viscosity builder for latex paints / Artur Palasz in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 212, N° 4676 (08/2022)
PermalinkPermalinkLow-cost emulsions - There's the rub ! / Artur Palasz in EUROPEAN COATINGS JOURNAL (ECJ), (07-08/2023)
PermalinkMethods 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)
PermalinkPermalinkVAE copolymer emulsions in latex paints / Artur Palasz in EUROPEAN COATINGS JOURNAL (ECJ), N° 1 (01/2022)
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