[article]
| 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 |
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 211, N° 4672 (12/2021) . - p. 27-35
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Ajouter le résultat dans votre panierMethods 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)
