Close-up on film formation / Imke Ludwig in EUROPEAN COATINGS JOURNAL (ECJ), N° 03/2008 (03/2008)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 03/2008 (03/2008) . - p. 22-28 Titre : Close-up on film formation : Identifying the effects of dispersion variables on waterborne PUR coatings Type de document : texte imprimé Auteurs : Imke Ludwig, Auteur ; Wilhelm Schabel, Auteur ; Joachim Krenn, Auteur Année de publication : 2008 Article en page(s) : p. 22-28 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dispersions et suspensions Formation de film Polyols Polyuréthanes Revêtements en phase aqueuse:Peinture en phase aqueuse Spectroscopie Raman Index. décimale : 667.9 Revêtements et enduits Résumé : Inverse micro raman spectrometry (IMRS) has been used to monitor the curing of 2-pack waterborne polyurethane coatings in detail. It is shown that a low solids content of the polyol component is essential to reduce the particle size of the dispersion and produce a more uniform final film. En ligne : https://drive.google.com/file/d/1HVEkfP4YdZS3vtKiDsM-w8h_sNucxSW3/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=2413 [article]

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Film formation of 2K waterborne polyurethane systems / Philippe Olier in COATINGS TECH, Vol. 7, N° 7 (07/2010)

[article]  inCOATINGS TECH > Vol. 7, N° 7 (07/2010) . - p. 38-42 Titre : Film formation of 2K waterborne polyurethane systems Type de document : texte imprimé Auteurs : Philippe Olier ; Imke Ludwig ; Mathias Kind ; Wilhelm Schabel ; Joachim Krenn ; Steve Meeker Année de publication : 2010 Article en page(s) : p. 38-42 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Formation de film Polyuréthanes Revêtements Revêtements bi-composant:Peinture bi-composant Revêtements en phase aqueuse -- Séchage:Peinture en phase aqueuse -- Séchage Revêtements en phase aqueuse:Peinture en phase aqueuse Spectroscopie Raman Index. décimale : 667.9 Revêtements et enduits Résumé : Two-pack (2K) waterborne polyurethanes are increasingly used in coatings technologies. Examples of such coatings can be encountered in many different fields including metal coatings (for railway carriage, car refinish ... ), wood coatings (e.g., parquet flooring, furniture) or soft-feel coatings for plastic in the automotive industry. The benefits brought by waterborne technology can explain this growth. It is fully compliant with the new volatile organic compounds (VOC) regulations and contributes to better health and safety conditions for both workers and end users. Of course, switching from solvent-based to waterborne technology implies technical challenges. Many improvements have been achieved during the past years to develop waterborne systems that can compete with solvent-based coatings. In the case of polyisocyanates, for instance, the ease of miwing in the formulation and the control of side reactions with water have been greatly improved by using hydrophilically modified polyisocyanates. However, a deeper understanding of the film formation mechanisms and the impact of different key parameters is still essential in order to finetune the formulation and achieve optimal results. Many techniques have been used to investigate these aspects such as Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), or even mechanical measurements. Confocal Raman spectroscopy has also been widely used but only a few reports mention its use for the investigation of aqueous systems. Here we present the use of Inverse Micro Raman spectroscopy (IMRS in order to investigate the drying behavior and fim composition of 2K waterborne polyurethanes. Note de contenu : - INVESTIGATION OF 2K WATERBORNE POLYURETHANE SYSTEMS USING IMRS : PRINCIPLES - QUANTITATIVE EVALUATION - EXPERIMENTAL : Inverse Micro Raman Spectroscopy (IMRS) experimental setup - Materials - RESULTS : Influence of the dry content of the polyol - Investigation of film drying and composition Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18462 [article]

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