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Polymer mixing enhances performance / Zhenwen Fu in EUROPEAN COATINGS JOURNAL (ECJ), N° 6/2009 (06/2009)
[article]
Titre : Polymer mixing enhances performance : Designed diffusion technology : a paradigm shift in film formation Type de document : texte imprimé Auteurs : Zhenwen Fu, Auteur ; Andrew Hejl, Auteur ; Andrew Swartz, Auteur Année de publication : 2009 Article en page(s) : p. 26-33 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alliages polymères
Couches minces
Formation de film
Polyacryliques
Polyuréthanes
Revêtements en phase aqueuse:Peinture en phase aqueuseIndex. décimale : 667.9 Revêtements et enduits Résumé : Designed diffusion technology provides an efficient way to combine high and low tG emulsion polymers so as to give rapid development of a hard film at low coalescent levels. A soft polymer is formulated so that it will interpenetrate the network of high-Tg polymer particles and coalescent will migrate from the hard polymer to the soft polymer during drying. Suitable polyurethane (PUD) and acrylic materials have been successfully produced. En ligne : https://drive.google.com/file/d/1mgXGgjBHLwQaUC8WyXsMesWJLCBuhyMV/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5945
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 6/2009 (06/2009) . - p. 26-33[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 011393 - Périodique Bibliothèque principale Documentaires Disponible Primary breakup of a non-Newtonian liquid using a high-speed rotary bell atomizer for spray-painting processes / Bo Shen in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 6 (11/2019)
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Titre : Primary breakup of a non-Newtonian liquid using a high-speed rotary bell atomizer for spray-painting processes Type de document : texte imprimé Auteurs : Bo Shen, Auteur ; Qiaoyan Ye, Auteur ; Nico Guettler, Auteur ; Oliver Tiedje, Auteur ; Joachim Domnick, Auteur Année de publication : 2019 Article en page(s) : p. 1581-1596 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Atomiseurs
Dépôt par pulvérisation
Fluides non newtoniens
Formation de film
Revêtements:Peinture
Rhéologie
Simulation par ordinateur
Système de pulvérisation (technologie)Index. décimale : 667.9 Revêtements et enduits Résumé : The present contribution deals with numerical and experimental studies of the primary liquid breakup process using a high-speed rotary bell atomizer. The first part of the investigations focuses on the film formation on the distributor disk and the inner surface of the rotary bell. Numerical simulations using the volume-of-fluid approach were carried out. A non-Newtonian liquid that has shear-thinning behavior is used to investigate the effect of the viscosity on the initial wetting, the film formation process, and the film thickness distribution on the bell. A nonhomogeneous film structure is found on the inner surface of the rotary bell. This is also observed in experimental investigations using a high-speed camera. The second part focuses on the disintegration process of the paint liquid in the near bell region. As inlet conditions for the breakup simulations, the properties of the liquid film at the bell edge, i.e., film thickness, velocities, and apparent viscosity, resulting from the film formation simulations were applied. Two different liquid disintegrations in the near-field were found, which were also observed in experimental investigations using a high-speed camera. Furthermore, user-defined functions were compiled in ANSYS Fluent to uniquely identify and characterize droplets formed through the breakup process. In this way, droplet properties such as diameter, velocity, and position can be determined. Note de contenu : - CHARACTERISTICS OF THE ATOMIZER : Experimental setup and measuring techniques
- NUMERICAL METHODS
- SIMULATION OF THE FILM FORMATION ON THE BELL : Computational domain - Wetting process on the bell - Simulation of air flow in the near bell region - Computational domain - Boundary conditions - Atomization regimes - Drop detectionDOI : 10.1007/s11998-019-00231-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-019-00231-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33411
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 6 (11/2019) . - p. 1581-1596[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21321 - Périodique Bibliothèque principale Documentaires Disponible Process model for latex film formation / Alexander F. Routh in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 73, N° 916 (05/2001)
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Titre : Process model for latex film formation : Optical clarity fronts Type de document : texte imprimé Auteurs : Alexander F. Routh, Auteur ; William B. Russel, Auteur ; Jiansheng Tang, Auteur ; Mohamed S. El-Aasser, Auteur Année de publication : 2001 Article en page(s) : p. 41-48 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Formation de film
Modèles mathématiques
Revêtements en phase aqueuse -- Séchage:Peinture en phase aqueuse -- SéchageIndex. décimale : 667.9 Revêtements et enduits Résumé : We examined the drying behavior of latex both theoretically and experimentally. The theory extends a model for horizontal drying fronts in films with nondeformable particles to incorporate particle deformation by a capillary deformation mechanism. The pressure in the fluid, causing particle compaction, arises from flow through the packed bed to ensure evaporation from all wet areas of the film. We predicted the position of a front of volume fraction unity passing across a semi-infinite film as it dries. Experimentally, the position of the transition from a cloudy film to optical clarity was tracked visually in films comprised of either single component soft latex particles, 20[degrees]C above the glass transition, or a blend containing 35% non-deformable hard latex particles. For an initial volume fraction of 0.33, we found excellent agreement between theory and experiment. For an initial volume fraction of 0.05, the agreement is less, although still qualitative. The limitations of the model with respect to t he knowledge of physical parameters and initial conditions are discussed. One major implication of the model is that deformation of soft latex particles displaces large amounts of water and, consequently, slozvs progression of the drying front. Harder particles and shallow initial film profiles produce more pronounced drying fronts. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5728
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 73, N° 916 (05/2001) . - p. 41-48[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001224 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Protecting the beauty : Polymer composition and formulation affect the performance of 1K coatings for furniture & flooring applications Type de document : texte imprimé Auteurs : Birgit Wirth, Auteur ; Alexander Schenzel, Auteur Année de publication : 2020 Article en page(s) : p. 34-39 Langues : Anglais (eng) Catégories : Auto-réticulation
Dureté (matériaux)
Essai de dureté
Formation de film
Formulation (Génie chimique)
Liants en phase aqueuse
Polyacryliques
Polymérisation
Résistance à l'abrasion
Résistance chimique
Revêtements en phase aqueuse:Peinture en phase aqueuse
Surfaces -- AnalyseIndex. décimale : 667.9 Revêtements et enduits Résumé : Water-borne coatings continue to grow in popularity. Self-crosslinking acrylic dispersions perform well and are easy to apply. Good resistance used to require high-MFFT dispersions, but can be provided by very fin dispersions that feature custom particle morphologies and post-crosslinking mechanisms and are more environmentally friendly. Note de contenu : - Polymerisation technique
- Binder systems
- Application tests
- Pendulum hardness
- Pencil hardness
- Chemical resistance
- Blocking resistance
- Improving hardness and blocking resistance
- Improving scratch resistance
- Matting studies
- Water spotting
- Right choice of cosolvent combination is key
- Blending concept
- Fig. 1 : Film formation by dispersion particles
- Fig. 2 : Polymerisation process
- Fig. 3 : AFM surface analysis of D3, 80 D3:20 06 and 70 D3:30 06. Dark = soft, bright = hard. The hard particles of D6 can be clearly seen
- Table 1 : Analytical data for the straight acrylic dispersions D1 t D6. Determined by means of HDC
- Table 2 : Standard formulation for the application tests
- Table 3 : Application test results for straight-acrylic binders. Chemical resistance : 0 (destruction of the coating) to 5 (no surface change visible) and blocking resistance : 5 (cannot be separted) to O (no force needed for separation)
- Table 4 : Improvement in hardness and blocking through blending. Chemical resistance values are not shown, as no differences can be observed
- Table 5 : Improvement in pencil hardness using waxesEn ligne : https://drive.google.com/file/d/1k2uaOeZ8LaIUA5Gef4yrpkmFaSRcH1tr/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34907
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 10 (10-11/2020) . - p. 34-39[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22463 - Périodique Bibliothèque principale Documentaires Disponible A question of distribution / Yves Holl in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 192, N° 4448 (01/2002)
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Titre : A question of distribution Type de document : texte imprimé Auteurs : Yves Holl, Auteur Année de publication : 2002 Article en page(s) : p. 16-23 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Formation de film
Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- Additifs
Revêtements en phase aqueuse -- Séchage:Peinture en phase aqueuse -- Séchage
SurfactantsIndex. décimale : 667.9 Revêtements et enduits Résumé : Waterborne organic coatings can be improved thanks to a better understanding of how small molecules affect their properties.
Waterborne coatings often contain small molecules (with low molecular weight as opposed to the macromolecules forming the matrix), wheter intentionally or not. These small molecules can be, for instance, undesirable residual monomers or oligomers; or they can be voluntary added formulation additives such as wetting agents, crosslinkers, adhesion promoters, plasticisers, coalescents, stabilisers or texturing agents. These molecules have a profound influence on properties. Not only do the small molecules affect properties through their total amount, but also, at a given concentration, through their distribution in the film. For example, if a small molecule, such as a surfactant, accumulates at the film-substrate interface of a water-borne coating, adhesion propertiesn especially in wet conditions, are strongly affected. Another example is food packaging and food can varnishes, where non-polymeric molecules should not migrate to the surface in contact with food.Note de contenu : - Distribution control
- Film formation
- Emulsion experiment
- Drying behaviour
- White state
- Surfactant distribution
- Collaborative researchPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28100
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 192, N° 4448 (01/2002) . - p. 16-23[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 000328 - Périodique Bibliothèque principale Documentaires Disponible PermalinkRole of van der Waals force in latex film formation / Xiaobo Gong in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 5, N° 3 (09/2008)
PermalinkStages of colour alterations during formation of pigmented polymer coatings / Irena. J. Zvonkina in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 88, B4 (12/2005)
PermalinkStress development and film formation in multiphase composite latexes / Kyle Price in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 6 (11/2014)
PermalinkSynthèse de colloïdes modèles par polymérisation en émulsion de styrène et d'acrylate de N-butyle. Leur utilisation dans des études de rhéologie et de formation de film / Jean-Luc Guillaume / 1985
PermalinkPermalinkThe influence of methacrylic acid and urethane methacrylate on the film properties of hybrid urethane–acrylic latexes in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)
PermalinkThe onset of polymer diffusion in a drying acrylate latex : how water initially retards coalescence but ultimately enhances diffusion / Jeffrey C. Haley in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 5, N° 2 (06/2008)
PermalinkThe use of engineered silica to enhance coatings / Jim Reader in COATINGS TECH, Vol. 17, N° 6 (06/2020)
PermalinkTime evolution of transition points in drying latex films / Wai Peng Lee in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 3, N° 4 (10/2006)
PermalinkVIS-optical reflectometry : a method to investigate latex-based coatings / Nicolae Tomozeiu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 6 (11/2019)
PermalinkWaterborne pressure sensitive adhesives for clear filmic labels and graphics / Olga Bernatova in ADHESION - ADHESIVES + SEALANTS, Vol. 15, N° 4/2018 (2018)
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