Improving application robustness / Francesca Fallani in EUROPEAN COATINGS JOURNAL (ECJ), (09/2024)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > (09/2024) . - p. 30-34 Titre : Improving application robustness : A new modified acrylic polyol resin with clear benefits for vehicle refinishing Type de document : texte imprimé Auteurs : Francesca Fallani, Auteur Année de publication : 2024 Article en page(s) : p. 30-34 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Automobiles -- Vernis Durée de vie en pot Formulation (Génie chimique) Polyacryliques Polyols Revêtements -- Finition Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : An acrylic polyol resin was modified with a new strong sag control agent and developed for use in vehicle refinish applicadons. It is especially designed to be compatible with fast drying clearcoats and efficiently improves application robustness. Benefits include saving time and energy as needed for post-application corrections, while still maintaining the good drying/pot-life balance, hardness, gloss and appearance of typical fast-drying clearcoats. Note de contenu : - Application performance in fast-drying vehicle refinish clearcoats - Good pot-life for consistent spraying - Efficient sagging reduction - Smooth surface = less corrective effort - Versatile resin for an excellent finish - Table 1 : Fast-drying clearcoat paint formulations wihhoul- SCA (Sample 1) and with 25 % based on resin solids of the new SCA-modified acrylic polyol (Sample 2) - Table 2 : Application performance of the two fast-drying clear-coat paint formulations of table 1 - Table 3 : Pot-life performance of the two fast-drying clearcoat paint formulations of table 1 En ligne : https://drive.google.com/file/d/10ndFsidvPLSHs3TKVs1T6MJ1LVSPyOTB/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41400 [article]

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MODAFLOW NSR 100, a novel nanosilica additive for excellent scratch resistance / M. Goedegebuure in SURFACE COATINGS INTERNATIONAL, Vol. 104.3 (05-06/2021)  

[article]  inSURFACE COATINGS INTERNATIONAL > Vol. 104.3 (05-06/2021) . - p. 194-199 Titre : MODAFLOW NSR 100, a novel nanosilica additive for excellent scratch resistance Type de document : texte imprimé Auteurs : M. Goedegebuure, Auteur ; M. P. E. Benjert, Auteur ; Francesca Fallani, Auteur ; E. de Wolf, Auteur Année de publication : 2021 Article en page(s) : p. 194-199 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Autobus -- Peinture Essais de résilience Essais dynamiques Nanoparticules Polyacryliques Polyesters Résistance à l'abrasion Revêtements -- Additifs:Peinture -- Additifs Silice La silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux. La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...). Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale. Index. décimale : 667.9 Revêtements et enduits Résumé : While visual appearance represents one of the most important criteria when buying a car, an item of furniture or other life style object, surface robustness makes all the difference when it cornes to daily use, such as washing your car or polishing your home furniture. High gloss appearance of automotive coatings, in fact, can be affected by micro-scratches, which are invisible to the naked eye, but result in a substantial loss of gloss because of a change in reflection of light (scattering), particularly visible on dark colours (basecoats) in the sunlight. Such scratches occur for instance because of (automatic) carwashes and are mainly due to dirt particles, not so much to the bristle hairs. The same dirt particles can also scratch the coating when driving and/or during harsh weather conditions, causing even more damage (wet vs. dry, or mar, scratching). Definitely, scratch resistance is a very important paint performance parameter for automotive coatings. To improve the scratch and mar resistance properties of automotive, refinish and high-end industrial coatings, allnex has developed MODAFLOW® NSR 100, a nanosilica-based anti-scratch additive, compatible with high bake 1K and 2K paints as well as Fast Cure room temperature curing 2K isocyanate paints. MODAFLOW® NSR 100 offers best-in-class scratch and mar resistance at low dosage without affecting appearance, giving fully transparent (no haze) clearcoats, unlike other hard nanoparticle-based additives, which can often negatively affect coating appearance, causing lower gloss, increased haze and reduced levelling. MODAFLOW® NSR 100 is supplied as a 35% solution and has excellent compatibility with a broad range of acrylics and polyesters. Note de contenu : - Working principle - MODAFLOW NSR 100 in 1K automotive OEM clearcoat - MODAFLOW NSR 100 in 2K automotive OEM clearcoat - MODAFLOW NSR 100 in fast cure-based 2K vehicle refinish clearcoat - Fig. 1 : TEM micrograph showing enrichment of MODAFLOW NSR 100 at the coating-air interface - Fig. 2 : Crockmeter - Fig. 3 : Carwash tester - Fig. 4 : Dry scratch resistance results (crockmeter) of 1K clearcoat reference without nanosilica vs. 1K clearcoat with MODAFLOW NSR 100 - Fig. 5 : Carwash resistance results of 1K clearcoat reference without nanosilica vs. 1K clearcoat with MODAFLOW NSR 100 - Fig. 6 : Wavescan results of 1K clearcoat reference without nanosilica vs. 1K clearcoat with MODAFLOW NSR 100 (magenta) - Fig. 7 : Dry scratch resistance results (crockmeter) of 2K clearcoat reference without nanosilica vs. 2K clearcoat with MODAFLOW® NSR 100 - Fig. 8 : Wavescan results of 2K clearcoat reference without nanosilica vs. 2K clearcoat with MODAFLOW® NSR 100 - Fig. 9 : Dry scratch resistance (crockmeter) of formulations based on SETALUX® 1915 BA-75 (left) and SETALUX FC 1922 BA-75 (right) with and without MODAFLOW' NSR 100 - Fig. 10 : Picture of coated panels after crock test : Clearcoat based on SETALUX FC 1922 BA-75 without nanosilica and same clearcoat with MODAFLOW NSR 100 - Fig. 11 : Isocyanate conversion at room temperature, measured by Infrared Spectroscopy : Formulation based on SETALUX® FC 1922 BA-75 and on SETALUX® 1915 BA-75 (both without nanosilica) - Fig. 12 : Spider diagram summarising the advantages and special features of MODAFLOW° NSR 100 (properties improve from inside to outside of the hexagon) - Table 1 : Performances of 1K clearcoats based on SETALUX® 1760 VB-64, with and without MODAFLOW NSR 100 - Table 2 : Performances of 2K clearcoats based on SETALUX 1767 VV-65, with and without MODAFLOW NSR 100 - Table 3 : Performances of 2K clearcoats based on SETALUX FC 1922 BA-75, with and without En ligne : https://drive.google.com/file/d/1bRtUqErwpj4t4NUD-5pLXr9g72T7UeV1/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36001 [article]

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Taking the next step in fast curing 2K NCO technology / Francesca Fallani in SURFACE COATINGS INTERNATIONAL, Vol. 104.2 (03-04/2021)  

[article]  inSURFACE COATINGS INTERNATIONAL > Vol. 104.2 (03-04/2021) . - p. 130-135 Titre : Taking the next step in fast curing 2K NCO technology Type de document : texte imprimé Auteurs : Francesca Fallani, Auteur ; G. Fuerpass, Auteur ; Andringa (H.), Auteur ; B. Mulder, Auteur Année de publication : 2021 Article en page(s) : p. 130-135 Langues : Anglais (eng) Catégories : Agents dispersants (chimie) Durée de vie en pot Essais de brouillard salin Formulation (Génie chimique) Haut extrait sec Isocyanates Polyacryliques Polyols Réticulation rapide Revêtements bi-composant Vernis Index. décimale : 667.9 Revêtements et enduits Résumé : Obtaining an improved balance between drying time and pot life is an ever-ongoing challenge in 2K isocyanate coatings. In this paper, allnex presents technology that takes 2K NCO curing to the next level, shortening the drying time down to 1 hour at room temperature, while increasing the pot life. In addition, the open time can be tuned and early hardness and chemical resistance are significantly improved. Note de contenu : - Clear coat application performance - SETALUX FC medium solids acrylic polyols - SETALUX FC high solids acrylic polyols - Study of clear coat conversion and coating properties - DUROFTAL FC high solid polyester polyols for top coat application - Formulation advice - Table 1 : Comparison of application data of new FC technology with standard medium solids - Table 2 : SETALUX FC high solids grades - Table 3 : Comparison of application data of new FC technology with standard high solids systems - Table 4 : Comparison of TG and crosslinking density between a standard system and the new fast cure technology - Table 5 : DURFTAL FC high solids grades - Table 6 : Paint data and drying performances of DUROFTAL FC and SETALUX FC grades versus high solids acrylic references - Table 7 : Hardness development and MEK resistance of DUROFTAL FC SETALUX FC grades versus high solids acrylic references - Table 8 : Salt spray and humidity resistance data of red pigmented topcoat based on DUROFTAL FC 2828 - Table 9 : Top coat formulations based on DUROFTAL FC 9511/80BAC - Fig. 1 : Pot life-drying balance comparison of new Fast Cure technology with a standard medium solids system : the size of the circles correlates with the hardness measured 1h after curing for 30 minutes at 60°C - Fig. 2 : Pot life-drying balance comparison of new Fast Cure technology with standard high solids systems ; the size of the circles correlates with the hardness measured 1 hour after tack-free time at RT - Fig. 3 : Isocyanate conversion versus time determined with infrared spectroscopy - Fig. 4 : Salt spray testing on red pigmented topcoat based on DUROFTAL FC 2828 for 1000 hours - Fig. 5 : Impact of dispersant on pot life of top coat formulations based on DUROFTAL FC 9511/80BAC - Fig. 6 : Spider diagram summarising the advantages and special features of high solids fast cure resins En ligne : https://drive.google.com/file/d/1engh2Nu8Zn9NyaXRMIVrBoi1jPPEC-dD/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36000 [article]

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