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Fast drying high solids latices / Fred Bückmann in EUROPEAN COATINGS JOURNAL (ECJ), N° 12/95 (12/1995)

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 12/95 (12/1995) . - p. 922-929 Titre : Fast drying high solids latices Type de document : texte imprimé Auteurs : Fred Bückmann, Auteur ; Folkert Bakker, Auteur Année de publication : 1995 Article en page(s) : p. 922-929 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acrylate de butyle Haut extrait sec Humidité -- Absorption Latex Liants Mélanges (chimie) Méthacrylate de méthyle Revêtement -- Séchage:Peinture -- Séchage Revêtements en phase aqueuse:Peinture en phase aqueuse Rhéologie Taille des particules Viscosité Index. décimale : 667.9 Revêtements et enduits Résumé : This paper describes a study of several model bimodal particle size distribution latex systems produced by blending large and small particle size anionically stabilised latices over a wide range of blend ratios. Minimum film forming temperature (MFT), drying rate and water uptake measurements were carried out. At a 80/20 weight ratio large/small particles, a minimum was observed in the MFT and also in the extent of water absorption of latex films with short drying times, although for films dried for longer periods, no such minimum in water absorption was observed. Drying profiles fit well with existing models, except for the 80/20 I/s blend which exhibits more complex drying behaviour. Low shear rate viscosity of selected blends was measured over a range of latex solids contents. The rheological data was fitted by the Krieger-Dougherty equation which was used to calculate the maximum volume packing fraction. An 80/20 blend (large/small) was found to exhibit a higher maximum volume fraction than that of either pure component of the blend, demonstrating the better packing achievable by blending. Finally several different application areas will be discussed. Note de contenu : - Selection of application areas for bimodal dispersions Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11377 [article]

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Dielectric cure analysis / Nathaniel T. Smith in EUROPEAN COATINGS JOURNAL (ECJ), N° 12/95 (12/1995)

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 12/95 (12/1995) . - p. 930-935 Titre : Dielectric cure analysis Type de document : texte imprimé Auteurs : Nathaniel T. Smith, Auteur ; David D. Shepard, Auteur Année de publication : 1995 Article en page(s) : p. 930-935 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Diélectriques Matières plastiques Réticulation (polymérisation) Rhéologie Transition vitreuse Viscosité Index. décimale : 667.9 Revêtements et enduits Résumé : In the past, dielectric analysis (DEA) has been used as an important measurement component in the overall analysis of polymer resin systems. Much of this work has been done at the research level in determining viscosity behavior, rate of cure, and cure endpoint. In the areas where DEA has been used in the production environment, it has been in the low volume applications of aerospace composites. Within the last several years there has been an expansion of the applications where dielectric cure analysis has been used. This growth in the applications of dielectric cure analysis has expanded beyond the traditional areas of monitoring the cure of composites to include such applications as factory floor control of molding operations, monitoring resin synthesis, reduction and/or elimination of physical testing, diffusion monitoring, and SQC analysis. These applications and other techniques will be presented. Note de contenu : - Traditional cure comparison - Dielectric correlation to glass transitions - Dielectric correlation to viscosity - Dielectric comparison with DSC - Dielectric applications - Research and development - Quality assurance - Production control - Resin synthesis, batch reaction monitoring - Diffusion Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11378 [article]

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Non-isocyanate, low-VOC urethane resins / Jim Huntley in EUROPEAN COATINGS JOURNAL (ECJ), N° 12/95 (12/1995)

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 12/95 (12/1995) . - p. 936-939 Titre : Non-isocyanate, low-VOC urethane resins Type de document : texte imprimé Auteurs : Jim Huntley, Auteur ; Chris Riley, Auteur Année de publication : 1995 Article en page(s) : p. 936-939 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Formulation (Génie chimique) Polymères -- Propriétés mécaniques Polyuréthanes Réticulation (polymérisation) Revêtements Index. décimale : 667.9 Revêtements et enduits Résumé : A new class of resins has been designed for high performance coatings for agricultural, heavy duty, rolling stock, commercial vehicle and some wood applications. These isocyanate-free urethane resins give high gloss as well as good weather and chemical resistance. Note de contenu : - The system and its use - The materials and curing chemistry - Curing mechanism - Film properties - Recommended entry point formulation - Using the system to produce coatings - Film performance - Volatile Organic Content (VOC) - Technical requirements Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11379 [article]

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