Diamide-based organic thixotrope : an alternative to fumed silica in adhesives and sealants / Vimal Saini in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 26, N° 11 (11/2019)  

[article]  inADHESIVES & SEALANTS INDUSTRY (ASI) > Vol. 26, N° 11 (11/2019) . - p. 21-26 Titre : Diamide-based organic thixotrope : an alternative to fumed silica in adhesives and sealants : A recently developed organic thixotrop based on diamide chemistry offers multiple opportunities for silyl-terminated polyurethane formulations Type de document : texte imprimé Auteurs : Vimal Saini, Auteur ; Carlos Feito, Auteur ; Jörg Bungarten, Auteur Année de publication : 2019 Article en page(s) : p. 21-26 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésifs -- Propriétés mécaniques Colles:Adhésifs Joints d'étanchéité -- Propriétés mécaniques Mastics Mastics -- Propriétés mécaniques Polymères à silane modifié Polyuréthanes Thixotropie Index. décimale : 668.3 Adhésifs et produits semblables Résumé : Silyl-terminated polyurethanes (SPUR) are the basis for numerous adhesives and sealants used worldwide. The high performance of this hybrid technology is a result of the synergy between the silane-curing mechanism and polyurethane backbone.1 SPUR polymers generally cure at room temperature and offer good durability. Note de contenu : - Activation and mechanism - Experimental - Pigmented system evaluation : Rheological efficiency - Yield point and extrudability - Sag stability and structure recovery - Mechanical properties - Non-pigmented system evaluation : Rheological efficiency - Extrudability in relation to yield point - Aplication and mechanical properties - Formulating efficiency - Table 1 : Guide formulation for pigmented and non-pigmented SPUR-based sealants - Table 2 : Sag performance comparison of SPUR sealant as a function of tan delta and flow paint - Table 3 : Mechanical properties of the cured pigmented SPUR sealant - Table 4 : Mechanical properties of the non-pigmented SPUR sealant En ligne : https://www.adhesivesmag.com/articles/97335-diamide-based-organic-thixotrope-an- [...] Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33216 [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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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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