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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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Keep on eye on the acid value / Damiano Beccaria 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. 21-25 Titre : Keep on eye on the acid value : Structure-property relations of incompatible resin blends for effective gloss control of polyester-b-hydroxyalkylamide powder coatings Type de document : texte imprimé Auteurs : Damiano Beccaria, Auteur ; Andrea Capra, Auteur ; Imir Bejko, Auteur ; Louis T. Germinario, Auteur Année de publication : 2003 Article en page(s) : p. 21-25 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : Precise gloss control of powder coatings is a major issue, especially since TGIC-free formulations have mad this task more difficult. However, detailed structure-property analyses of blends of polyester-β-hydroxyalkylamide systems based on different, incompatible resins reveal, that the difference in acid value between the two resins in the blends can serve as a very reliable gloss determinating property. Note de contenu : Gloss modification mechanisms Experimental details Looking at the differences in resin properties Temperature effect in gloss reduction Gel time and acid value differences are independent Acid values can control gloss. En ligne : https://drive.google.com/file/d/1vaPhO2yKBaHCMynJ0VFCuIkfybrguMC8/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9449 [article]

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Colour change in OEM coatings after weathering / Carlos E. Vignolo 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. 26-30 Titre : Colour change in OEM coatings after weathering Type de document : texte imprimé Auteurs : Carlos E. Vignolo, Auteur Année de publication : 2003 Article en page(s) : p. 26-30 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : In this article the colourimetrical meaning of a grey scale is evaluated, aiming to find the key of the correlation between the visual assessment and colour difference formulae. The case of straight shades and effect coatings are considering as well. A simple empirical formula based on the well-known colour tolerances for controlling and supplying paint batches was found as the numerical results of deviation after exposure of a grey scale was computed. A general colourimetrical rule can thus be used for an objective evaluation of the results. Note de contenu : Colourimetrical examination of the grey scale / Case of straight shades : use of CIE94 colour difference formula / Case of effect colour shades En ligne : https://drive.google.com/file/d/1bQYZk7lzsOdh98225QeAyjmYAWcvevQK/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9477 [article]

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Catch the worm in four dimensions / Jörg Schröder 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. 31-37 Titre : Catch the worm in four dimensions Type de document : texte imprimé Auteurs : Jörg Schröder, Auteur Année de publication : 2003 Article en page(s) : p. 31-37 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : The Cohesion Parameter Concept (CPC) is a theoretical method to describe the interactions between the main components of a coating formulation, i.e. binder, solvent, and pigments – analogous to the Hansen Solubility Parameter Concept. An improvement of that method is reported here : two parameters are used to describe hydrogen bonds/acid-base interactions more realistically – in total, the model then uses four parameters. With this modification, the model allows for a realistic evaluation and optimisation of coating formulations in terms of their thermodynamic stability. Note de contenu : A method to judge formulations thermodynamically / H-Bonds are better described by two parameters / Exchange energy density – the more negative, the better / Adapt δD and δP of the components, do not adapt δA and δB / How to determine the values for the new parameters? / Assessing the fundamentals of a pigment dispersion / Comparison between theory/experiment : better prediction with 4D-CPC / Visualise the model En ligne : https://drive.google.com/file/d/1Xb9apcNJHBGI3uf8qRja2FTiXzNLj2Ms/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9478 [article]

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PUre cleanness / Rupert Stadler 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. 63-66 Titre : PUre cleanness : A waterborne fluoro-modified polyurethane system for permanent anti-graffiti- and anti-soiling-coatings Type de document : texte imprimé Auteurs : Rupert Stadler, Auteur ; Alois Maier, Auteur ; Norbert Steidl, Auteur Année de publication : 2003 Article en page(s) : p. 63-66 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Angle de contact Composés fluorés Fluor Groupe hydroxyle Polymères -- Synthèse Polyuréthanes Revêtements anti-graffitis Revêtements antisalissures Revêtements en phase aqueuse -- Additifs Index. décimale : 667.9 Revêtements et enduits Résumé : ANti-soiling coatings are trendy. Functional binders exhibiting anti-graffiti and anti-soiling properties are attracting ever increasing interest in the areas of research and development. A novel waterborne fluoro-modified 1-part or 2-part polyurethane system already meets all requirements of the VOC guideline of the European Community (EC Guideling 1999/13), generates surfaces with extremely low critical surface tensions and is comparable to "Teflon". Note de contenu : - Temporary and permanent anti-graffiti systems - Repelling water and oil : fluorinated polymers - Synthesis of the fluoro-modified polyurethane dispersions - Reaching the goal in two steps - Hydroxyl groups enable crosslinking - A high degree of crosslinking via oligomeric compounds - Adhesion characteristics on the substrate remain - Fluorinated building blocks increase contact angle - Determination of critical surface tension by contact angle measurement - Surface hardness can be adjusted - Future projects : the molecular topology - Fig. 1 : Structure of the IPDI based building block (Rf = fluorinated segment ; x = 1,2) - Fig. 2 : Reaction of toluene diisocyanate (TDI) with a fluorinated alcohol and following conversion with diethanolamine (x = 1,2) - Fig. 3 :Scheme of the synthetic procedure of a waterborne polyurethane system (x = 1,2) - Table 1 : Contact angles of a water droplet on some selected fluorinated PU-films : crosslinked with "Rhodocoat" WT 2101 - Table 2 : Surface tension YL of different alkanes and their contact angle 0 on the investigated PUD-films En ligne : https://drive.google.com/file/d/1f39pTDY2nk4ycmwzWH4KBXQ2leXqZ4L1/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40662 [article]

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Caught firm in the tangle of the pores 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. 51-52 Titre : Caught firm in the tangle of the pores : Deep filtration for total cleanliness Type de document : texte imprimé Année de publication : 2003 Article en page(s) : p. 51-52 Langues : Anglais (eng) Catégories : Filtration Filtres Impuretés Nontissés Revêtements Index. décimale : 667.9 Revêtements et enduits Résumé : The extent to which disturbing particles can be removed from coatings materials depends on the size of the particles and the consistency of the material. Whilst dirt particles with a large diameter can be removed by means of surface filtration, this is not so easily done with small particles. The only possibility here is deep filtration. There is a wide range of such filtering methods and materials available, which will be described in this article. Note de contenu : - Random-laid non-woven fabric as filter-material - Bag filters : from the inside to the outside - Filter elements : from the inside to the outside - Plate filters have large surfaces - Fig. 1 : Whilst with bag filters the material to be filtered is conducted through the filter medium from the inside to the outside - Fig. 2 : Production flow in filter elements goes from the outside to the inside En ligne : https://drive.google.com/file/d/1mgLfwTwuZ69LNNvXyB3FcsDBql6YT_gl/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40670 [article]

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