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Powder coating production / Thomas Anlauf in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 207, N° 4635 (10/2017)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 207, N° 4635 (10/2017) . - p. 15-16 Titre : Powder coating production Type de document : texte imprimé Auteurs : Thomas Anlauf, Auteur Année de publication : 2017 Article en page(s) : p. 15-16 Langues : Anglais (eng) Catégories : Production Revêtements poudre:Peinture poudre Technique de la production Index. décimale : 667.9 Revêtements et enduits Résumé : The author discusses the main challenges in powder coating production. Note de contenu : - Reducing time in the cleaning process - Increasing productivity - Fig. 1. Comparison of ACM EC and ACM EC-CL design - Fig. 2. Comparative results after 15hr production time - Fig. 3. A grinding system for powder paint - Fig. 4. Powder coatings : ultrafine powder, after compaction and after granulation En ligne : https://drive.google.com/file/d/1MtciugEaNLONMxnOGCsAWB9eYlXCWQmi/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29302 [article]

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New directions in wood directions / Marie Bleuzen in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 207, N° 4635 (10/2017)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 207, N° 4635 (10/2017) . - p. 18-19 Titre : New directions in wood directions Type de document : texte imprimé Auteurs : Marie Bleuzen, Auteur Année de publication : 2017 Article en page(s) : p. 18-19 Langues : Anglais (eng) Catégories : Applications extérieures Bois -- Revêtements protecteurs Durée de vie (Ingénierie) Polyacryliques Résistance à l'humidité:Résistance à l'eau Résistance aux conditions climatiques Revêtements en phase aqueuse Index. décimale : 667.9 Revêtements et enduits Résumé : The author discusses new formulation for semi-transparent wood stains that aims to give superior exterior durability. More restrictive regulatory requirements along with applicators' preference for low odour, safe to handle products, are continuing to drive the adoption of waterborne formulations as opposed to solventborne. The wood coatings sector is no exception, where performance criteria, such as exterior durability, early water resistance and hardness development are key, whatever the formulation base. Recent developments in acrylic technology have helped to address increasing demand for more environmentally responsible formulations, with waterborne solutions enabling minimal emissions of Volatile Organic Compounds (VOCs) and supporting APEO-free coatings. However, with tough exposure demands in an exterior environment, acrylic-based wood stains must be capable of withstanding peeling and flaking, phenomena that result from degradation at the wood coating interface. New developments at Dow, which is increasingly working with 100% acrylics, are designed to address these challenges and deliver against appearance criteria, water resistance and durability demands. Note de contenu : - Key performance requirements - Polymer characteristics - Early water resistance - Appearance and durability - Table : Primat ST-410 properties - FIGURES : 1. Stabilisation of transparent iron oxide pigments. SEM pictures of binders with ultrafine red iron oxide colourant - 2. 16hr air dry. 16hr fog box En ligne : https://drive.google.com/file/d/1WApCw40CnM2RqNWSDHmQjbzxFvpY-hzs/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29303 [article]

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Future labelling-free anticorrosive pigments for ecological paint recipes / Thomas Sowade in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 207, N° 4635 (10/2017)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 207, N° 4635 (10/2017) . - p. 2-5 Titre : Future labelling-free anticorrosive pigments for ecological paint recipes Type de document : texte imprimé Auteurs : Thomas Sowade, Auteur Année de publication : 2017 Article en page(s) : p. 2-5 Note générale : Suppl. "Going green" - Bibliogr. Langues : Anglais (eng) Catégories : Anticorrosifs Phosphate de zinc Pigments métalliques Produits chimiques -- Suppression ou remplacement Index. décimale : 667.6 Peintures Résumé : Looking into the history of anticorrosive pigments (ACO-pigments), the driving innovation factors were always performance and legislation in combination with costs. The toxic behaviour of red lead or chromates already opened the door to non-toxic alternatives 30 years ago. The stepwise ongoing stricter handling of for example the Cr6 ended up in an almost complete ban in Europe for the benefit of all consumers : Chrome-based pigments are SVHCs (substances of very high concern) in the European Union and currently the sunset date for eg Strontiumchromate and Zinctetraoxychromate is set for January 2019 with the possibility to apply for an authorisation until July 2017. These pigments show an excellent cost/performance ratio. Nevertheless, due to their toxicity, for more than 30 years, alternatives like zinc phosphates have made inroads. Standard products with universel applicability significantly reduced the consumption of chromates, however they did net always reach the required performance due to a different working mechanism. All phosphate pigments have in common the fact that they build an anodic passivation via precipitation of phosphate complex layers in combination with metal hydroxide barriers (see Figure 1), white Crelons additionally act cathodically. Therefore, standard zinc phosphate has been improved by two major steps : The first step was the modification of standard zinc phosphate changing, for example, pH, solubility, adding synergistic values etc. Second was the introduction of polyphosphates for higher sophisticated applications, such as coil coatings, aircraft primers etc, which can also be supported by the use of silica-based ion-exchange pigments. All improved products are highly linked to specific binder systems, therefore more universel zinc-containing pigments have been developed as 'wide-spectrum-anticorrosives', combining the different improvement factors into a single pigment or even developing different modifications. Note de contenu : - How to use zinc-containing aco-pigments to achieve a labelling-free paint ? - Zinc-free aco-pigments for long-term labelling free paint formulations - FIGURES : 1. Working principle of phosphate-based ACO-pigments - 2. Performance of a zinc aluminium polyphosphate - 3-4. Performance of a "low-level-zinc" pigment - 5. Zinc-free pigment vs organically and crystal structure optimised calcium phosphate - 6. Performance of calcium aluminium polyphosphate silicate - 7. Performance of strontium aluminium polyphosphate - 8. Performance of calcium magnesium phosphate - 9. Performance of silica-ion exchange pigment En ligne : https://drive.google.com/file/d/1GACmzXaRwYC9xZ_Y4RtLWi-6w_BPKjZz/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29304 [article]

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Waterborne coatings and sustainability in industrial wood coatings / Beth Earnst in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 207, N° 4635 (10/2017)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 207, N° 4635 (10/2017) . - p. 21-24 Titre : Waterborne coatings and sustainability in industrial wood coatings Type de document : texte imprimé Auteurs : Beth Earnst, Auteur Année de publication : 2017 Article en page(s) : p. 21-24 Langues : Anglais (eng) Catégories : Bois -- Revêtements:Bois -- Peinture Durée de vie (Ingénierie) Revêtements en phase aqueuse Revêtements poudre:Peinture poudre Index. décimale : 667.9 Revêtements et enduits Résumé : The industrial wood coatings market is estimated at E6.bbn in size and is growing at a compound annual growth rate in excess of two percent. The growth of the market is driven by macro-trends, such as the increased urbanisation and growth of the middle class in Asia, regional increases in population and home ownership, and moves to increase productivity and reduce cost by pre-priming joinery items, such as cladding and windows prior to finishing on construction sites. Competing against these strong growth drivers is the accelerating trend of substitution by alternate substrates most notably, the substitution of décor foils for wood/veneers in furniture and panelling and luxury vinyl tile for flooring ; such technologies have made great strides in their aesthetic performance over the past several years. The industrial wood market may be broadly split into four key segments of Cabinets, Flooring, Fumiture, and Building Products. Figure 1 shows the values and geographic-splits of these segments. This article explores some of the latest demands for sustainable coatings and specifically explores the requirements for products which cannot be delivered by fully roll-coated flat line applications where 100% UV technology is clearly recognised as the benchmark for sustainability given the excellent transfer rates, productivity, and zero solvent characteristics of the product. Note de contenu : - Replacement of nitrocellulose lacquers by waterborne coatings - Growth of waterborne UV technology - Powder coatings for wood/MDF - FIGURES : 1. Global industrial wood coatings market : 6.5Ebn - 2. A step panel created by colour stylists at AkzoNbel to define how a wood finish should appear when applied in several steps. Below, a example of a case good created from a step panel - 3a. Picture showing Aquasilk coating on left vs conventional WB (wet) - 3b. Aquasilk coating wet - 3c. Aquasilk coating dry - 4. Relative performance of Aquasilk products, MPU and nitrocellulose - 5. Examples of whitening caused by trapped water - 6. Flow out of powder coating and powder + liquid. Full powder system A side and powder only A side, note the mrring and bubbling in the crevices - Table : Values obtained assuming 75% coating transfer efficiency and a 6ft2 door surface En ligne : https://drive.google.com/file/d/1pOuacG85YnicXi-XJtNTEO6wTv5_qcF6/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29305 [article]

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New method for objective hiding assessment of wall paint / Steven de Backer in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 207, N° 4635 (10/2017)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 207, N° 4635 (10/2017) . - p. 25-26 Titre : New method for objective hiding assessment of wall paint Type de document : texte imprimé Auteurs : Steven de Backer, Auteur Année de publication : 2017 Article en page(s) : p. 25-26 Langues : Anglais (eng) Catégories : Analyse d'image L'analyse d'image est la reconnaissance des éléments contenus dans l'image. Il ne faut pas confondre analyse (décomposition en éléments) et traitement (action sur les composantes) de l'image. Essais (technologie) Evaluation Imagerie tridimensionnelle Peinture au rouleau Revêtement mural:Peinture murale Index. décimale : 667.9 Revêtements et enduits Résumé : In this paper it is demonstrated that it is possible to determinethe dry film thickness via a flatbed scanner at a pixel level throughout the scanned surface. A simple stastitical analysis gives information about the distribution of the thicknesses, grey values and reflectances. It is shown that the results of this statistical analysis can be linked with the intrinsic hiding power and the flow behaviour of the paints, allowing one to quantify the latter. Note de contenu : - The kubelka-mune equation - Flow behaviour of architectural coatings - FIGURES : 1. Picture of the drawdown at different film builds and films builds as determined by a profilometer and as calculated by the Kubelka-Munk approach based on reflectances - 2. Roller application on a black substrate, conversion of the visual picture to reflectances (the higher the whiteness, the higher the reflectance), 3D map as calculated by the Kubelka Munk equations and histogram of the thicknesses of the appllied paint - 3. Rollet applications of a ppoor flowing paint A, medium flowing paint B and very good flowing paint C on a black surface. Middle, 3D images of the respective roller applications (area 10x14 cm) and details of the respective 3D images - 4. Histograms of paints A, B and C showing the number of pixels with a certain grey value and histogram of paints A, B and C showing the number of pixels with a certain wet film thickness En ligne : https://drive.google.com/file/d/1xJ3hRJZg5xj5hneWN2jx0RYvdxJ3SPQR/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29317 [article]

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Appearance measurement along the entire process chain / Peter Bannwitz in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 207, N° 4635 (10/2017)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 207, N° 4635 (10/2017) . - p. 27-28 Titre : Appearance measurement along the entire process chain Type de document : texte imprimé Auteurs : Peter Bannwitz, Auteur ; Domenique Weiner, Auteur Année de publication : 2017 Article en page(s) : p. 27-28 Langues : Anglais (eng) Catégories : Automobiles -- Revêtements:Automobiles -- Peinture Mesure -- Instruments Mesures optiques Procédés de fabrication Index. décimale : 667.9 Revêtements et enduits Résumé : Using the example of automotive paint processes, an innovative methodology for appearance measurement based on the approved confocal technology of NanoFocus AG will be presented in this paper. The methodology allows for the description of the development of the appearance along the entire process chain. It will be shown that this methodology correlates well Wh conventional measurements. Additionally, the effect of different substrate materials and various production sites will be explained. As the appearance of a coating is a significant quality criterion in automotive manufacturing, applying suitable and high-performance metrology solutions is crucial. Currently, appearance can only be determined at the end of the painting process after the clear coat is applied. In contrast to this, a new optical measurement device allows one to determine the appearance parameters along the entire process chain. It consists of an optical-confocal measurement system developed by NanoFocus AG' combined with an analysis methodology developed by inpro'. Measurement values can be acquired on the sheet material, after the press shop, the body shop and finally after each paint layer. A correlation between this new technology and classical metrology methods was required in order to gain the acceptance of the automotive industry. Note de contenu : - Measurement device - Analysis methodology - Conventional appearance measurements - Application En ligne : https://drive.google.com/file/d/1_i3CW90kKPKYqlA844RtX791f4Fa1ylO/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29326 [article]

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New non-isocyanate moisture curable silylated resin for protective coating applications / Michael Seeber in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 207, N° 4635 (10/2017)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 207, N° 4635 (10/2017) . - p. 29-34 Titre : New non-isocyanate moisture curable silylated resin for protective coating applications Type de document : texte imprimé Auteurs : Michael Seeber, Auteur ; Nayeem Soad, Auteur ; Vikram Kumar, Auteur ; Dean Kondos, Auteur ; Antonio Chaves, Auteur ; Martin Wusik, Auteur Année de publication : 2017 Article en page(s) : p. 29-34 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Anticorrosifs Anticorrosion Dépôt par pulvérisation Essais de résilience Essais dynamiques Flexion (mécanique) Formulation (Génie chimique) Isocyanates -- Suppression ou remplacement Métaux -- Revêtements protecteurs Photostabilité Polyuréthanes Réticulation à l'humidité Revêtement monocomposant Silylation La silylation est l'introduction d'un groupe silyle, généralement substitué (R3Si–), dans une molécule. Stabilité au stockage Surfaces -- Nettoyage Vernis Viscosité Index. décimale : 667.9 Revêtements et enduits Résumé : Two-component (2K) polyurethane coatings are widely used as the top layer of protective coatings systems to provide performance benefits, such as UV durability, flexibility and chemical resistance. However, these 2K products are coming under increasing scrutiny due to the presence of unreacted isocyanate in the uncured formulation. There have been efforts made ta develop non-isocyanate based coatings however, it is a challenge to do so while providing ail performance benefits of a 2K Polyurethane coating. A new non¬isocyanate moisture curable silylated resin for protective coating applications is discussed in this paper. This resin is targeted to enable the coating formulator ta develop a one¬component (1K) non-isocyanate coating that provides performance on par with the current 2K polyurethane coatings. Some of the key coating properties that were studied and are . discussed herein are UV durability, flexibility, corrosion resistance and chemical resistance. Note de contenu : - EXPERIMENTAL : Metal cleaning process - Spray coating application - Design of experiments/formulation - Testing protocols - Chemical resistance test - RESULTS AND DISCUSSION : Viscosity and shelf stability of Y-19243 resin and model formulations - Flexibility and impact resistance of Y-19243 resin - Outdoor durability and chemical resistance - Corrosion resistance - TABLES : 1. Basic clear coat sample formulation - 2. Grind paste sample formulation using TiO2 and Y-19243 - 3. Grind paste sample formulation using TiO2 and Y-19243 with a pigment binder of 0.35 - 4. Cross hatch adhesion values after seven day cure at room temperature - 5. Pass/fail results for 3/4" Mandrel bend test on CRS substrates - 6. Summary of colour and gloss values before and after exposure to QUV-B weathering for eight weeks - FIGURES : 1. Konig hardness values as a function of # oscillations vs room temperature cure time over 60 days - 2. Evolutions of viscosity (cP) as measured at two week time intervals after ageing in a 50°C oven. Measurements were taken of Y-19243 resin as produced, as well as model clear formulations - 3. Visual images of mandrel bend tests. A. Exp. clear, no catalyst B; Exp clear with catalyst ; C. Exp white, no catalyst, with catalyst ; E. Comm 1K-A ; F. Comm 1K-B ; G. 2K PU - 4. Frontal and reverse impact resistance values in lbs force for all model formulations and commercial controls. Panels were tested after 30 days of room temperature cure - 5. Chemical resistance ratings scale - 6. Visual representation of areas of cured films exposed to all solvents tested - 7. Corrosion resistance after 1500 hr exposure to NSS. a) Com. 1K-A ; b) Comm. 1K-B - c) Comm. 2K PU ; d) Exp white, no catalyst ; e) Exp white, catalyst En ligne : https://drive.google.com/file/d/1LqialbhrHGYZelQtXxUle97cwrueSbAY/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29327 [article]

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Polymer Paint Colour Journal - PPCJ Vol. 207, N° 4635 URL