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Film formation in powder coatings / Thomas Brock in EUROPEAN COATINGS JOURNAL (ECJ), N° 9/01 (09/2001)
[article]
Titre : Film formation in powder coatings Type de document : texte imprimé Auteurs : Thomas Brock, Auteur ; Michael Groteklaes, Auteur ; Peter Mischke, Auteur Année de publication : 2001 Article en page(s) : p. 86-87 Langues : Anglais (eng) Catégories : Formation de film
Revêtements poudre:Peinture poudreIndex. décimale : 667.9 Revêtements et enduits Note de contenu : - Compromise between storage stability and cost-effective stoving
- Melt viscosity and surface tension
- Fig. 1 : Object temperature and viscosity of a powder coating vs. time during a stoving process
- Fig. 2 : Correlation betweenthe surface quality of a powder coating and surface tension and melt viscosityPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33497
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 9/01 (09/2001) . - p. 86-87[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 000637 - Périodique Bibliothèque principale Documentaires Disponible Film formation mechanism of two-component waterborne polyurethane coatings / Charles R. Hegedus in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 68, N° 852 (01/1996)
[article]
Titre : Film formation mechanism of two-component waterborne polyurethane coatings Type de document : texte imprimé Auteurs : Charles R. Hegedus, Auteur ; Andrew G. Gilicinski, Auteur ; Robert J. Haney, Auteur Année de publication : 1996 Article en page(s) : p. 51-61 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Coalescence (Sciences physiques)
Dispersions et suspensions
Formation de film
Isocyanates
Polyuréthanes
Réactions chimiques
Revêtements bi-composant:Peinture bi-composant
Revêtements en phase aqueuse:Peinture en phase aqueuseIndex. décimale : 667.9 Revêtements et enduits Résumé : Two-component (2K) waterborne polyurethane coatings are a new technology which has been demonstrated in a number of heavy duty applications. They exhibit performance properties equivalent to 2K solvent-borne polyurethanes, with the advantage of reduced volatile organic compounds (VOCs). Although the use of these systems has been demonstrated successfully, the details of their film formation mechanism have not been established. The objective of this work was to propose and confirm the film formation mechanism of these systems. A dynamic series of interrelated events which occur during the process was identified using a number of analytical techniques to study two isocyanate/ hydroxyl functional dispersion systems. The mechanism is presented in terms of an event timeline that chronicles the critical events which occur prior to and after application of the coating. Film property development after application also was evaluated and these results were analyzed in terms of the proposed film formation mechanism. Note de contenu : - BACKGROUND ON FILM FORMATION
- PROPOSED FILM FORMATION MECHANISM FOR 2K WATERBORNE POLYURETHANE COATINGS
- EXPERIMENTAL : Materials and coating preparation - Equipment and procedures
- RESULTS AND DISCUSSION : Particle coalescence in the admixed state - Isocyanate reaction in the admixed state - Evaporation of volatiles and particle coalescence after application - Isocyanate reaction afetr application - Development of film integrityPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18310
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 68, N° 852 (01/1996) . - p. 51-61[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 003513 - Périodique Bibliothèque principale Documentaires Disponible 003522 - Périodique Bibliothèque principale Documentaires Exclu du prêt Film formation of 2K waterborne polyurethane systems / Philippe Olier in COATINGS TECH, Vol. 7, N° 7 (07/2010)
[article]
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 RamanIndex. 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 compositionPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18462
in COATINGS TECH > Vol. 7, N° 7 (07/2010) . - p. 38-42[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012368 - Périodique Bibliothèque principale Documentaires Disponible Film formation of vinyl acrylic latexes ; effects of surfactant type, water and latex particle size / Gerald A. Vandezande in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 68, N° 860 (09/1996)
[article]
Titre : Film formation of vinyl acrylic latexes ; effects of surfactant type, water and latex particle size Type de document : texte imprimé Auteurs : Gerald A. Vandezande, Auteur ; Alfred Rudin, Auteur Année de publication : 1996 Article en page(s) : p. 63-73 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Coalescence (Sciences physiques)
Formation de film
Plastifiants
Polyacétate de vinyle
Polyacrylate de butyle
Revêtements
Revêtements -- Additifs
Revêtements en phase aqueuse:Peinture en phase aqueuse
Surfactants
Taille des particules
Température de transition
Transition vitreuseIndex. décimale : 667.9 Revêtements et enduits Résumé : The process of film formation from an 85/15 vinyl acetate/butyl acrylate latex was studied with respect to the effects of particle size and surfactant type on minimum film formation temperature (MFFT), glass transition temperature (Tg), drying rates, and optical clarity of the coalesced films. Water plasticizes this polymer and thus only wet viscoelastic parameters and Tg values are realistic in film formation theories. The polymer is plasticized by ethoxylated alkylphenol nonionic surfactants. The surfactants with shorter ethylene oxide chains are better plasticizers and poorer steric stabilizers than their longer analogs. The type and concentration of stabilizing entities on the latex particle surfaces have very significant effects on the drying and coalescence properties of these latexes. Coalescence is somewhat faster with smaller latex particle sizes but larger particle size products dry at a faster rate than smaller ones in the absence of surfactant effects. Note de contenu : - EXPERIMENTAL : Latex production apparatus - Production of monodisperse latexes - Seeded monodisperse latexes - Addition of surfactants to latexes - Conversion - Particle size and distribution measurements - Differential scanning calorimetry - Dynamic mechanical measurements - Minimum film forming temperature - Drying rates of latexes using a UV/vis spectrometer - Drying of latexes using gravimetric analysis
- RESULTS AND DISCUSSION : Stabilizer and surfactant effects on the Tg and minimum film forming temperatures of latexes - Drying rates of latexes - Water as a plasticizer - Combining water and surfactant effectsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18443
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 68, N° 860 (09/1996) . - p. 63-73[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 003518 - Périodique Bibliothèque principale Documentaires Disponible 003529 - Périodique Bibliothèque principale Documentaires Exclu du prêt Film formation process monitoring of coatings by adaptive speckle imaging interferometry / Antonio Saranillo in COATINGS TECH, Vol. 18, N° 1 (01/2021)
[article]
Titre : Film formation process monitoring of coatings by adaptive speckle imaging interferometry Type de document : texte imprimé Auteurs : Antonio Saranillo, Auteur ; Williams Sherwin, Auteur ; Sarjak H. Amin, Auteur ; Theodore Provder, Auteur ; Allayna Lee, Auteur ; Nawshova Tasmeen, Auteur Année de publication : 2021 Article en page(s) : p. 28-45 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Formation de film
Formulation (Génie chimique)
Revêtement -- Séchage:Peinture -- Séchage
Revêtements -- Analyse:Peinture -- AnalyseIndex. décimale : 667.9 Revêtements et enduits Résumé : During the film formation process, an applied liquid film transforms into an adherent solid film through physical and/or chemical processes. The film formation process involves changes in rheology, evolution of mechanical properties, and the resultant ultimate film structure and morphology. In this study, the film formation process of coatings was monitored using a novel and innovative technology denoted as Adaptive Speckle Imaging Interferometry (ASII). Film formation data obtained from ASII was compared with information obtained from more traditional methods, such as set-to-touch time, tack-free time and dry-hard time (from a mechanical recorder), rate of volatiles evaporation from thermogravimetric analysis, and degree of chemical cure from differential scanning calorimetry, where applicable. Combining information from several techniques provides a more comprehensive picture of the film formation process for a wide variety of waterborne and solvent-based coatings : architectural interior and exterior coatings, industrial maintenance, marine, and gel coat coatings. Excellent repeatability and reproducibility of ASII drying curves were demonstrated. ASII drying curves can differentiate film thickness, substrate type, volatile organic compound level, pigment volume concentration, resin type, and coating manufacturer for a specific type of coating. Note de contenu : - EXPERIMENTAL : Materials - Adaptive speckle imaging intererometry - Thermal gravimetric analysis - Differential scanning calorimetry - Mechanical recorder
- RESULTS AND DISCUSSION : Mechanical recorder and TGA results - Drying curve results
- Table 1 : Paint samples ID and description
- Table 2 : Paint formulas formodel exterior latex paint as a function of VOC
- Table 3 : Paint formulas for model interior latex paint as a function of PVCEn ligne : https://drive.google.com/file/d/1AQA4hGrW5JXCOYSV00gBGYMDUFL6yK3k/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35009
in COATINGS TECH > Vol. 18, N° 1 (01/2021) . - p. 28-45[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22513 - Périodique Bibliothèque principale Documentaires Disponible 22514 - Périodique Bibliothèque principale Documentaires Disponible PermalinkFluorescence decay methods for the characterization of latex film formation / J. M. G. Martinho in COATINGS TECH, Vol. 10, N° 9 (09/2013)
PermalinkFormulation high-performance waterborne acrylic : Direct-to-metal coatings under 25 g/L VOC / Kathleen Auld in COATINGS TECH, Vol. 17, N° 9 (09/2020)
PermalinkFunctional latex and thermoset latex films / James W. Taylor in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 1, N° 3 (07/2004)
PermalinkInfluence of additives on interfacial phenomena during film formation of powder coatings / Petra Uhlmann in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 73, N° 915 (04/2001)
PermalinkInvestigation of the effect of precoalescence or postcoalescence crosslinking on film formation, properties, and latex morphology / Ravi G. Joshi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 6, N° 1 (03/2009)
PermalinkPermalinkLow emission for the furniture industry / Christopher Funke in ADHESION - ADHESIVES + SEALANTS, Vol. 13, N° 3/2016 (2016)
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PermalinkA monitoring system for reflectance measurement during the wet-to-dry conversion of a coating formulation / Irena. J. Zvonkina in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 87, B4 (12/2004)
PermalinkNano-cerium dioxide synergistic potential on abrasion resistance and surface properties of polyurethane-nanocomposite coatings for esthetic and decorative applications on wood / Akbar Mastouri Mansourabad in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 6 (11/2020)
PermalinkNanolatex technology 1 : synthesis and characterization of nanosize acrylic latexes and comparison to their conventional size counterparts / Ravi G. Joshi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)
PermalinkLes peintures aqueuses à haute performance / Association Française des Techniciens des Peintures, Vernis, Encres et Adhésifs / Paris : AFTPVA (1996)
PermalinkPlasticizer : Need for emulsion polymer based coatings, adhesives & sealants / Ravindra V. Gadhave in PAINTINDIA, Vol. LXVII, N° 1 (01/2017)
PermalinkPlastics - Polymers dispersions - Determination of white point temperature and minimum film-forming temperature - Norme ISO 2118 / International Organization for Standardization (Genève, Suisse) / Geneve [Switzerland] : International Organization for Standardization (ISO) (1996)
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