Cooler options for spray coatings / Udo Schonhoff in EUROPEAN COATINGS JOURNAL (ECJ), N° 2 (02/2018)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 2 (02/2018) . - p. 40-45 Titre : Cooler options for spray coatings : Diamide-based rheology modifiers offer quick activation at low temperatures Type de document : texte imprimé Auteurs : Udo Schonhoff, Auteur ; Carlos Feito, Auteur ; Frank Abschlag, Auteur ; Elke Piron, Auteur Année de publication : 2018 Article en page(s) : p. 40-45 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Amides Dépôt par pulvérisation Epaississants Essais d'adhésion Marines (peinture) Revêtement en phase solvant:Peinture en phase solvant Revêtements -- Additifs:Peinture -- Additifs Rhéologie Viscosité Index. décimale : 667.9 Revêtements et enduits Résumé : Many industrial, maintenance and marine spray coatings have very high requirements in terms of sag stability and layer thickness – around 1000u% or greater in one pass. These specific needs limit the selection of suitable rheology modifiers. Novel diamide-based additives now offer processors flexibility over a wide range of activation temperatures and improved viscosity at low shear forces. Note de contenu : Many industrial, maintenance and marine spray coatings have very high requirements in terms of sag stability and layer thickness – around 1000u% or greater in one pass. These specific needs limit the selection of suitable rheology modifiers. Novel diamide-based additives now offer processors flexibility over a wide range of activation temperatures and improved viscosity at low shear forces. - Rheology modifiers for a wide range of solvents - Activation at low temperatures - Improved viscosity at lower shear forces - Robust intercoat adhesion - Highest viscosity and layer thickness with millbase addition - FIGURES : 1. Flow characteristics provided by the various classes of rheological modifiers – 2. Schematic representation of the mechanisms of action of a diamide-based rheology modifier after correct activation – 3. Optimum activation temperature range – 4. Rheology curves of a solvent-based protective and marine coating equipped with 1% of the relevant rheology modifier activated at 63°C – 5. Viscoelastic behavior of test systems. The yellow line indicates the point at which shear was stopped after application – 6. Intercoat adhesion testing – 7. Low-shear viscosity data at 0.1 s-1 and the maximum applicable layer thickness by blade application in accordance with the specified incorporation and activation method En ligne : https://drive.google.com/file/d/1vaAw4Ird5xDgf-NRJJ7T8atQpRzKPVxu/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30198 [article]

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Difficult substrates well wetted / Vimal Saini in EUROPEAN COATINGS JOURNAL (ECJ), N° 11 (11/2019)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 11 (11/2019) . - p. 30-36 Titre : Difficult substrates well wetted : A low-foaming, low-VOC wetting agent that contains no APEOs Type de document : texte imprimé Auteurs : Vimal Saini, Auteur ; Wolfgang Fuchs, Auteur ; Elke Piron, Auteur ; Carlos Feita, Auteur ; Udo Schonhoff, Auteur ; Frank Abschlag, Auteur Année de publication : 2019 Article en page(s) : p. 30-36 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dispersions et suspensions Mouillage (chimie des surfaces) Polyacryliques Revêtements organiques Vernis en phase aqueuse -- Additifs Index. décimale : 667.9 Revêtements et enduits Résumé : As environmental regulations keep getting tighter and eco-friendly coatings become more popular, the time is ripe for a low-VOC wetting agent that is free of alkylphenol ethoxylates. It is designed to maximise wetting on even difficult-to-wet sub-strates and in a Ovide range of applications, such as aqueous coatings, TiO2 slurries, pigment concentrates, adhesives and inks. Note de contenu : - Wetting basics - Challenging water-bornes - Experimental : Samples - Lower surface tension - Smaller contact angle - Look - No foam ! - Evaluation 1 : acrylic dispersion clearcoat - Evaluation 2 : White wood-coating based on self-crosslinking acrylic dispersion - Improved surface wetting - Better blocking resistance - Good pore-filling - Relative overall performance - Substrate wettability in OPV ink and adhesive systems - Fig. 1 : Contact angles formed by sessile liquid drops on a smooth homogeneous surface - Fig. 2 : Static surface tension of aqueous solutions conhaining 0.3 wt.% wetting agent - Fig. 3 : Evolution of advancing contact angle with 0.3% aqueous solutions of wetting agents on untreated polypropylene plastic and on glass substrate - Fig. 4 : Foaming behaviour in aqueous solution - Fig. 5 : Brush-applied clearcoat on Leneta test chart - Fig. 6 : Wetting performance in white wood coating based on self-crosslinking acrylic dispersion - Fig. 7 : Improved blocking resistance with "Supread 2059" - Fig. 8 : Pore-filling ability via spray application (scale in all samples - A mm, except reference 3 : 3 mm - Table 1 : Transparent clearcoat based on acrylic dispersion - Table 2 : Wood coating based on self-crosslinking acrylic dispersion - Table 3 : White window paint test formulation - Table 4 : Overall application performance En ligne : https://drive.google.com/file/d/1lnxpVc1v-ODQoDM0yd7J0cD1M50ClE5P/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33166 [article]

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Getting more with wax / Udo Schonhoff in EUROPEAN COATINGS JOURNAL (ECJ), N° 10 (10/2019)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 10 (10/2019) . - p. 44-49 Titre : Getting more with wax : A new generation of organic thixotropes for your adhesive and sealant formulations Type de document : texte imprimé Auteurs : Udo Schonhoff, Auteur ; Carlos Feito, Auteur ; Frank Abschlag, Auteur ; Elke Piron, Auteur ; Jörg Bungarten, Auteur Année de publication : 2019 Article en page(s) : p. 44-49 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cires Colles:Adhésifs Epaississants Mastics Polymères à silane modifié Rhéologie Thixotropie Index. décimale : 667.9 Revêtements et enduits Résumé : Adhesives and sealants based on modern silylated hybrid polymers, also called modified-silane polymers (MS, MSP or SPUR), are typically applied in very high thicknesses to fill wide gaps. That means that high sag- and slump-stability are required di-rectly after the application. Note de contenu : - Why is this a step forward ? - Chemistry and activation - Application in solvent-free adhesives and sealants - Fig. 1 : Mechanism of diamide-based organic thixotropes - Fig. 2 : Comparison of the new organic thixotrope with conventional organic thixotropes - Fig. 3 : Sag stability with different concentration of the thixotrope - Fig. 4 : Viscosity build depending on concentration - thixotrope vs fumed silica - Fig. 5 : Flow point depending on concentration - Fig. 6 : Thread description - Fig. 7 : Extrusion rates versus viscoelastic data - Fig. 8 : Viscosity and shear stress depending on shear rate En ligne : https://drive.google.com/file/d/1DRfwHAAaJ7XRg_xuW5qoV54LFfktTi66/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33052 [article]

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It's all about the flow... / Udo Schonhoff in EUROPEAN COATINGS JOURNAL (ECJ), N° 3 (03/2022)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 3 (03/2022) . - p. 18-24 Titre : It's all about the flow... : Influence of balanced rheology-modifier ratios on the optical properties of water-borne metallic coatings Type de document : texte imprimé Auteurs : Udo Schonhoff, Auteur ; Carlos Feito, Auteur ; Elke Piron, Auteur ; Jörg Bungarten, Auteur Année de publication : 2022 Article en page(s) : p. 18-24 Langues : Anglais (eng) Catégories : Brillance (optique) Hectorite Pigments -- Propriétés optiques Pigments à effets métalliques Rhéologie Stabilité au stockage Thixotropie Index. décimale : 667.2 Colorants et pigments Résumé : The shape and surface of pigments influence the appearance of a metallic coating, but drying behaviour and the characteristics of the liquid coating are also essential for optimum optics. Note de contenu : - Three types of metallics - Correct orientation important - Water-bornes need longer drying times - The right balance - Hectorite clay - Ase's and hase's - A study in flop and rheology - Increased flop - Increased thixotropy - Predicting recovery time - Structure-recovery tests - Longer recovery, better otics - Poorer performance of synthetic hectorite - Good storage stability - Table 1 : Performance overview En ligne : https://drive.google.com/file/d/1CmL7REroRSYjvi-l_MP_kb8G2xs4cu3I/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37236 [article]

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Multifunctional superwetting agent for coating applications / Vimal Saini in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 209, N° 4657 (12/2019)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 209, N° 4657 (12/2019) . - p. 15-20 Titre : Multifunctional superwetting agent for coating applications Type de document : texte imprimé Auteurs : Vimal Saini, Auteur ; Wolfgang Fuchs, Auteur ; Elke Piron, Auteur ; Carlos Feito, Auteur ; Udo Schonhoff, Auteur ; Frank Abschlag, Auteur Année de publication : 2019 Article en page(s) : p. 15-20 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents mouillants Angle de contact Formulation (Génie chimique) Polyacryliques Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- Additifs Tension superficielle Index. décimale : 667.9 Revêtements et enduits Résumé : Wetting agents are added to waterborne coatings in order to increase the wetting of the substrate and to improve the compatibility with pigments and other components. Selection of the suitable wetting agent for desired formulation and application properties is critical. For example, anionic wetting agents can have excellent dynamic surface tension control but can often result in an increase in the foaminess of the grind that may appear as microfoam in the applied coating. Low foaming nonionic wetting agents have found value in industrial coatings, where microfoam cannot be tolerated however, they do not provide adequate surface tension control. To overcome these limitations, a new low foaming, silicon and APEO free multifunctional wetting agent has been developed (SUPREAD® 2059). It provides antifoaming properties, as well as offering fast dynamic surface tension reduction for improved flow and levelling on difficult to wet surfaces like wood, plastics etc. The newly developed multifunctional wetting agent was tested in various coating formulations. The results of the study reveals its outstanding ability in surface wetting, antifoaming, pore filling on wood, block resistance and has shown no negative impact on gloss or rheology. Note de contenu : - BASICS OF WETTING - CHALLENGES IN WATERBORNE COATINGS : Sample examined - Surface tension - Contact angle - Foaming behaviour - EVALUATION IN CLEAR COAT BASED ON ACRYLIC DISPERSION - EVALUATION IN WHITE WOOD COATING BASED ON SELF6CROSSLINKING ACRYLIC DISPERSION : Improved surface wetting - Block resistance - Pore filing ability - Overall performance comparison - Substrate wettability in OPV ink and adhesive system - Fig. 1 : Illustration of contact angles formed by sessile liquid drops on a smooth homogeneous surface - Fig. 2 : Static surface tension comparison of aqueous solutions containing 0.3wt% wetting agent - Fig. 3 : Evolution of advancing contact angle with 0.3% aqueous solutions of wetting agents a) in glass substrate and b) on untreated polypropylene plastic - Fig. 4 : Foaming behaviour with the Skandex shaker - Fig. 5 : Rheograms of the clear coat - Fig. 6 : Brush applied clear coat on Lenata chart - Fig. 7 : Wetting performance in white wood coating based on self-crosslinking acrylic dispersion Brush applied clear coat on Lenata chart - Fig. 8 : Improved block resistance with Supread® 2059 - Fig. 9 : Pore filling ability via spray application (Scale in all samples -1mm (only except Reference 3-3mm) - Fig. 10 : Surface wettability comparison with 0.3% Supread® 2059 al In OPV system on PVC wallpaper bl BOPP film - Table 1 : Samples examined - Table 2 : Application properties of clear coat based with different wetting agents - Table 3 : Overall application performance comparison - Table 4 : Transparent clear coat based on acrylic dispersion - Table 5 : Based on self-crosslinking acrylic dispersion - Table 6 : White window paint test formulation En ligne : https://drive.google.com/file/d/16NX56HuRVYQUKgsuozi6IysnzQju6B6v/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33395 [article]

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Next generation of thickeners in industrial coatings & construction systems / Rajni Gupta in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 208, N° 4644 (09/2018)  

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No alcohol is no solution either / Udo Schonhoff in SURFACE COATINGS INTERNATIONAL, Vol. 104.5 (09-10/2021)  

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Rheology is guiding the way... Influence of balanced rheology modifier ratios on the optical appearance of aqueous metallic coatings / Udo Schonhoff in SURFACE COATINGS INTERNATIONAL, Vol. 105.3 (05-06/2022)  

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Tolerance for alcohol and temperature / Udo Schonhoff in EUROPEAN COATINGS JOURNAL (ECJ), N° 9 (09/2021)

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