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Next generation styrene-acrylic binders / Thomas Bernhofer in EUROPEAN COATINGS JOURNAL (ECJ), N° 11 (11/2018)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 11 (11/2018) . - p. 18-22 Titre : Next generation styrene-acrylic binders : High performance results for decorative and silicate paints Type de document : texte imprimé Auteurs : Thomas Bernhofer, Auteur Année de publication : 2018 Article en page(s) : p. 18-22 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chlorure de polyvinyle Copolymère styrène acrylate de butyle Copolymère styrène acrylique Dispersions et suspensions Formulation (Génie chimique) Humidité -- Absorption:Eau -- Absorption Liants Résistance au lavage Revêtement mural:Peinture murale Revêtements décoratifs:Peinture décorative Silanes Silicates Index. décimale : 667.9 Revêtements et enduits Résumé : The use of a styrene-acrylic dispersion as binder in decorative wall paint has been the industry standard in many regions, thanks to its intrinsic high water resistance and outstanding pigment loading capability. Styrene-acrylic dispersions with a low minimum filmformation temperature (MFFT) based on styrene and butyl acrylate monomers have made a good contribution to reduce the need for plasticisers or solvents for film formation, so that the finished paints meet EU volatile organic compound (VOC) emission standard - 2004/42/EC. While the approach has been accepted as the state of the art solution for many years, paint manufacturers are continuously searching for improvements to meet higher market requirements and ever-increasing regulatory standards. Note de contenu : - Our goals - Silane works as post-addition additive, but not for long - Stabilisation by polymerisation - Influence of monomer - Compatibility with silicate - Stability of polymer dispersion at high pH - Polymer performance in paint formulations - VOC content and residual monomers - What's next ? - Figure : Water uptake of polymer dispersion in % - Table 1 : Wet scrub resistance of styrene-butyl acrylate polymers with post addition silane - Table 2 : Physical properties of polymer dispersion - Table 3 : Silicate compatibility of dispersion (Brookfield-viscosity LVT A/6) - Table 4 : Storage stability of dispersion at high pH - Table 5 : Formulation A (67% PVC) and formulation B (70% PVC) - Table 6 : Paint performance in formulation A & B En ligne : https://drive.google.com/file/d/1XRNIXj8hKPeCNjQBpeaiALrBHKi-ITLq/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31213 [article]

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After registration is before registration / Kerstin Heitmann in EUROPEAN COATINGS JOURNAL (ECJ), N° 11 (11/2018)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 11 (11/2018) . - p. 26-27 Titre : After registration is before registration : 31 May 2018 marked the end of the final transition phase for registration of substances in the low-tonnage bands under REACH. What do companies need to consider now? Type de document : texte imprimé Auteurs : Kerstin Heitmann, Auteur Année de publication : 2018 Article en page(s) : p. 26-27 Langues : Anglais (eng) Catégories : Chimie industrielle -- Législation -- Pays de l'Union européenne Index. décimale : 667.9 Revêtements et enduits Résumé : Only those companies, which had submitted registration dossiers for their manufactured or imported substances by that deadline, are allowed to keep manufacturing or importing those substances (apart from a few exceptions). Note de contenu : - Reach-compliant without registration number? - Registration after the deadline - The deadline is not the end of the matter - evaluation by competent authorities - Industry participation - Table : Activities by competent authorities under REACH and CLP En ligne : https://drive.google.com/file/d/14w0R7vJLBXv3C-ClPTWPMZab2BdtN_uR/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31216 [article]

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From hot gas stream to matt finish / Lars Leidolph in EUROPEAN COATINGS JOURNAL (ECJ), N° 11 (11/2018)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 11 (11/2018) . - p. 30-35 Titre : From hot gas stream to matt finish : Thanks to novel method of spray calcination, test-ready additives for rapid market entry can be ready in just a few weeks Type de document : texte imprimé Auteurs : Lars Leidolph, Auteur ; Andreas kröger, Auteur Année de publication : 2018 Article en page(s) : p. 30-35 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agent mattant Dioxyde de silicium Gaz chaud Pulvérisation Revêtements -- Additifs:Peinture -- Additifs Index. décimale : 667.9 Revêtements et enduits Résumé : Whether it's rapid prototyping, customisation or personalisation, paint manufacturers can usually only dream of what has long been a reality in other industries. Their ideas are thwarted by minimun purchase qualities, a lack of know-how, expensive machinery or the unvailability of yet-to-be-developed powder types. Note de contenu : - The heyday of dullness - How matting arises - Challenges in matting - Particules from the pulsating hot stream - Commercially available raw materials are sufficient - What happens in the reactor ? - Market opportunities - Products sample within hours - Fig. 1 : Microscopic image of a matting agent with coating layer in 31.5: magnification (Olympus 53-BX) - Fig. 2 : Targeted adjustment of the particle size as a combination of coarse and fine matting particles, for example for dull surfaces - Fig. 3 : In the synthesis reactor, only the gas flow pulsates in a controlled manner in the specially designed combustion chamber. For particle production, fine droplets of a raw material solution are sprayed into the gas stream - they form the particles - Fig. 4 : The pulsating gas flow, in contrast to the continuous gas flow, due to the high degree of turbulence no temperature and speed gradients. Therefore all particles experience the same thermal treatment - Fig. 5 : For the chemical and mineralogical reaction, the particles are heated up extremely quickly and cooled down again. The schematic representation shows the coonversion of the injected raw material solution over the crystal-forming structures up to the calcined particle - Fig. 6 : Functionalisation of particles : matting agents can be coated with a wax component for better integration into the product matrix. The liquid coating is sprayed on and dried until the desired degree of closure of the surface or the required layer thickness is achieved - Fig. 7 : Analytical data of a thermally treated matting agent (SiO2) with a modified surface and particle size, which is very suitable for use in water-based systems. The measurement result by means of laser diffraction gives information about the suitable particle size spectrum (within the red peak) - Fig. 8 : Test and production plant ProAPP for the production of high-performance powders such as matting agents En ligne : https://drive.google.com/file/d/1O1q6XtTz3v0Pllana8hJ3yxlmenKkJDF/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31217 [article]

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Structural colours inspired by nature / Hendrik Hölscher in EUROPEAN COATINGS JOURNAL (ECJ), N° 11 (11/2018)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 11 (11/2018) . - p. 36-41 Titre : Structural colours inspired by nature : Nanostructures found in plants and insects have useful commercial applications Type de document : texte imprimé Auteurs : Hendrik Hölscher, Auteur Année de publication : 2018 Article en page(s) : p. 36-41 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chimie biomimétique Couleur Couleur -- Analyse Nanostructures Polyméthacrylate de méthyle Le poly(méthacrylate de méthyle) (souvent abrégé en PMMA, de l'anglais Poly(methyl methacrylate)) est un polymère thermoplastique transparent obtenu par polyaddition dont le monomère est le méthacrylate de méthyle (MMA). Ce polymère est plus connu sous son premier nom commercial de Plexiglas (nom déposé), même si le leader global du PMMA est Altuglas International9 du groupe Arkema, sous le nom commercial Altuglas. Il est également vendu sous les noms commerciaux Lucite, Crystalite, Perspex ou Nudec. vision des couleurs Index. décimale : 667.9 Revêtements et enduits Résumé : Some plants and animals display vibrant colours that are produced by nanostructures not pigments. Recent advances in nano-analytics and fabrication reveal the physics behind these structural colours. Structural colours have several advantages over conventional pigments as they are very efficient in terms of brightness and material usage, and do not fade. These natural structures therefore make ideal prototypes for new types of colourfull materials and coatings. Note de contenu : - Photonic crystal structures for consistent colour - Commercial application not yet cost effective - Colour shifts with shape memory opals - Near-perfect whiteness inspired by nature - Foamed PMMA scatters light of all wavelengths - Fig. 1 : Peacock feathers contain voids [inset] which act as photonic crystals, producing the iridescent colours - Fig. 2 : 3D cinema glasses reveal that the green rose chafer beetle only reflects left circularised light. It appears green through the left lens and black through the right - Fig. 3 : a) The chitin nanostructure in this Morpho rhetenor produces its bright blue colouring. The smaller artificiel butterfly is another example of this type of nanostructure. b) High-resolution electron microscopy reveals this Christmas-tree like structure with its "branches" being only 50-70 nm thick. c) 80-year-old pendant demonstrates the longevity of structural colour - Fig. 4 : Fabrication process of shape memory polymers opals (SMPOs) - Fig. 5 : Demonstration of the colour change of a SMPO from orange/brown to green by mechanical stretching - Fig. 6 : a) The white beetle Cyphochilus insulanus is well-known for its white appearance caused by its nearly perfectly scattering white scales ; b) The inner structure of the scales contains a random structure of nanoscale fibrils - Fig. 7 : A process to fabricate a white PMMA coating by infiltrating supercritical CO2 En ligne : https://drive.google.com/file/d/1PA_1jnSH6glqrtj8C_BlbOcbCpWjoGzt/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31220 [article]

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Significantly increased transfer efficiency / Atman Fozdar in EUROPEAN COATINGS JOURNAL (ECJ), N° 11 (11/2018)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 11 (11/2018) . - p. 42-48 Titre : Significantly increased transfer efficiency : Enhanced technology for electrostatic spray on nonconductive substrates and complex geometries Type de document : texte imprimé Auteurs : Atman Fozdar, Auteur ; Ronald Lewarchik, Auteur ; Vijay M. Mannari Année de publication : 2018 Article en page(s) : p. 42-48 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Composites à fibres végétales Essais d'adhésion Essais dynamiques Matières plastiques -- Revêtement Polycarbonates Promoteurs d'adhésion Pulvérisation électrostatique Revêtements -- Additifs Revêtements -- Séchage sous rayonnement ultraviolet Revêtements poudre Terpolymère acrylonitrile butadiène styrène Traction (mécanique) Index. décimale : 667.9 Revêtements et enduits Résumé : Rapid drying conductive adhesion promoters provide improved adhesion of powder and liquid coatings to nonconductive substrates such as ABS and polycarbonate and improve transfer efficiency by dissipating static charge. Note de contenu : - Surface resistivity is key - Adhering coatings on plastics - Type of substrate matters greatly - Method - Where are we now ? - Where to next ? - Fig. 1 : Classification of conductive materials - Fig. 2 : Uncoated polycarbonate/ABS composite ; polycarbonate/ABS coated with UV curable powder coating - Fig. 3 : Uncoated wood-plastic composite (WPC) ; wood-plastic composite coated with UV curable powder coating - fig. 4 : Cohesive failure of powder coating on wood-plastic composite after Positest pull-off adhesion test - Fig. 5 : Log of surface resistivity (Ohm/Square) Vs % loading of conductivity agent on total formulation solids - Fig. 6 : Log of surface resistivity (Ohm/Square vs. % loading of conductive nanoparticle on total formulation solids - Fig. 7 : Uncoated curved porcelain tile ; curved porcelain tile coated with low temperature cure powder coating with texture finish - Fig. 8 : Graphical representation of positest pull-off adhesion test, ASTM D4541 - cohesive failure within powder coating, no interfacial adhesive failure - Table 1 : Surface resistivity of coated substrate using different types of conductivity agent at various loadings - Table 2 : Heat deflection temperature of different plastics and type of powder coating that can be used - Table 3 : ASTM D4541 positest AT-A pull-off adhesion test En ligne : https://drive.google.com/file/d/1IjiDAzMtSiLLM4kxuCdCDFNHd5H6t0CO/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31221 [article]

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Germ-free in the container in EUROPEAN COATINGS JOURNAL (ECJ), N° 11 (11/2018)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 11 (11/2018) . - p. 16-17 Titre : Germ-free in the container Type de document : texte imprimé Année de publication : 2018 Article en page(s) : p. 16-17 Langues : Anglais (eng) Catégories : Antimicrobiens Revêtements (produits chimiques):Peinture (produits chimiques) Revêtements en phase aqueuse:Peinture en phase aqueuse Vernis en phase aqueuse Index. décimale : 667.9 Revêtements et enduits Résumé : Microorganisms often feel quite comfortable in aqueous environments, which can be a problem for water-based paints and varnishes. Our product overview shows a few examples of common biocides, which eliminate the little tormentors from their cooking process in the container and ensure contamination-free products. En ligne : https://drive.google.com/file/d/1bv6jLAKqJwBYptuUDTQX7EFOPZ5KZNnG/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32985 [article]

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