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The best for red and yellow / Frank Kleinsteinberg in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 210, N° 4663 (08/2020)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 210, N° 4663 (08/2020) . - p. 15-16 Titre : The best for red and yellow Type de document : texte imprimé Auteurs : Frank Kleinsteinberg, Auteur ; Markus Vogel, Auteur Année de publication : 2020 Article en page(s) : p. 15-16 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Additifs Agents dispersants (chimie) Agents mouillants Caractérisation Jaune Oxyde de fer Pigments inorganiques Potentiel zeta Rhéologie Rouge (couleur) Stabilité au stockage Taille des particules Index. décimale : 667.2 Colorants et pigments Résumé : The author discusses a new additive technology for waterborne iron oxide pigment concentrates. In decorative coatings, the use of pigment concentrates is a modem and flexible wayto produce coloured paints. Especially in waterborne applications, these concentrates have to be suitable for a broad range of different binder technologies. Because of that, the concentrate formulations are usually free of binders and feature a broad compatibility. Furthermore, the demands in terms of storage stability, colour strength and cost efficiency are very high. These demands are addressed directly to the used additive technology. The additive has to induce outstanding viscosity reduction to achieve the highest pigment loads and the most economic grinding. It has to stabilise the pigments over a long period of time without any change in viscosity and it has to develop maximum colour strength to avoid any waste of expensive pigments. The most important pigment class in decorative coatings are the iron oxides. Iron oxides are not difficult to wet because of their shape. Iron oxide yellow tends to give dilatant rheology, which can be a disaster when it comes to automatically dosing in a dispensing machine. Iron oxide red, on the other hand, tends to increase the viscosity of pigment concentrates over time. This paper elucidates to different structures of wetting and dispersing additives, which could be used in waterborne, binder-free pigment concentrates for iron oxides and their performance. It is focused on the stability and the wetting of the pigments, which are reflected by the viscosity reduction, the storage stability of the pigment concentrates and the colouristic properties. For the characterisation of the wetting behaviour and the dispersing efficiency, the zeta potential has been used. In the end, advice and guidelines for formulating iron oxide pigment concentrates will be given. Note de contenu : - Pigment concentrate technology - Pigment dispersion process - Electrostatic stabilisation - Zeta potential - Steric stabilisation - Discussion of the results - Particle size andhiding power - Viscosity and stability - Zeta potential En ligne : https://drive.google.com/file/d/1y0_JPiIZxLA8SxrNLDp3PBsmcTfHJWJH/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34450 [article]

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Controlling colour with high performance inorganic pigments / Mark Ryan in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 210, N° 4663 (08/2020)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 210, N° 4663 (08/2020) . - p. 19-20 Titre : Controlling colour with high performance inorganic pigments Type de document : texte imprimé Auteurs : Mark Ryan, Auteur Année de publication : 2020 Article en page(s) : p. 19-20 Langues : Anglais (eng) Catégories : Dispersions et suspensions Pigments inorganiques Revêtements poudre:Peinture poudre Index. décimale : 667.2 Colorants et pigments Résumé : The authors discusses the dispersion of Complex Inorganic Colour Pigments (CICPs) in powder coatings. The previous article discussed the general properties of the class of high-performance pigments known as Complex Inorganic Colour Pigments (CICPs). These pigments are known for their outstanding inertness and resistance to chemicals, migration and weathering. They also have some inherent colouring properties advantageous for powder coatings. The control of colour in powder coatings depends on the predictability of the dispersion of the coloured pigments. CICPs have dispersion properties that produce colour that is controllable and stable. CICPs give controllable colour because the relatively higher use-rates as compared to organic pigments allow more advantageous mixing ratios. This can be demonstrated in the tinting of near white colours. Stability is beneficial if the powder coating needs to be re-extruded to correct for other colourants performance. The CICPs will not develop as much colour as standard organic pigments. Stability can be demonstrated by comparing a light blue tint colour made with either standard phthalo blue (PBI15.1), or Cobalt Blue (PBI28). Note de contenu : - Explanation of testing procedure - Table 1 : Light blue tint polyester/TGIC formula - Table 2 : Colour shift from re-extrusions for blue tints - Table 3 : Tonic of TGIC whites with violet - Table 4 : Colour results for toning of whites - Fig. 1 : Color change (DE after 2x extrusion - Fig. 2 : Toning whites with violet - En ligne : https://drive.google.com/file/d/1_mrA3lszTboR1wzQbGn9p_IUz0_9yMrv/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34451 [article]

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Polyers paint colour Journal Vol. 210, N° 4663 URL