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Rheological changes during the drying of a waterborne latex coating / Frank Loffläth in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 69, N° 867 (04/1997)
[article]
Titre : Rheological changes during the drying of a waterborne latex coating Type de document : texte imprimé Auteurs : Frank Loffläth, Auteur ; Matthew Gebhard, Auteur Année de publication : 1997 Article en page(s) : p. 55-66 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Evaporation
Latex
Revêtement -- Séchage:Peinture -- Séchage
Revêtements en phase aqueuse:Peinture en phase aqueuse
Rhéologie
ViscositéIndex. décimale : 667.9 Revêtements et enduits Résumé : Increases in the low shear viscosity occurring during drying of a water-based latex film were examined as a function of pH, cosolvents, and base. The water and cosolvent evaporation rates were determined as a function of temperature and humidity. Water was found to evaporate with an activity coefficient of 1 and a ΔHv equivalent to pure water. The viscosity changes were determined from a creep measurement. The data is explained by the volume packing model of De Kruif. For several of the films, the ratio between volume and weight fraction was not a static parameter, and an abnormally large drop in the effective volume and weight fraction was observed. This was exaggerated for the samples with ethylene glycol monobutyl ether (EB) or NH4OH. The high volatility of EB explains the former, while the latter result indicates that NH4OH suppresses viscosity during drying. Note de contenu : - THEORETICAL BACKGROUND : Evaporation process - Viscosity and volume fraction - Combination of evaporation and volume-fraction/ viscosity equations
- EXPERIMENTAL DATA : Raw material and sample preparation - Evaporation measurements - Viscosity increase during evaporation - Intrinsic viscosity - Determination of open time
- RESULT AND ANALYSIS : Evaporation rates - Intrinsic viscosity - Viscosity increase during drying - Physical changes in the sample upon drying - Correlation between drying curve data and open timePermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18111
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 69, N° 867 (04/1997) . - p. 55-66[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 003536 - Périodique Bibliothèque principale Documentaires Disponible Saving on drying time / Johan Nienhuis in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 192, N° 4455 (08/2002)
[article]
Titre : Saving on drying time Type de document : texte imprimé Auteurs : Johan Nienhuis, Auteur ; Mari de Meijer, Auteur Année de publication : 2002 Article en page(s) : p. 29-30 Langues : Anglais (eng) Catégories : Bois -- Revêtements protecteurs
Revêtement -- Séchage:Peinture -- Séchage
Revêtements en phase aqueuse:Peinture en phase aqueuseIndex. décimale : 667.9 Revêtements et enduits Résumé : In the first part of an article on waterborne coatings for the wood industry the authors report on why a chain approach is needed from joinery industry to the building site.
Stricter legislation on the use of solvent borne coatings forces the Dutch joinery industry to consider alternative primer systems. A logical choice is to switch to waterborne primers. However, if these coatings are used in the typical DUtch way of building, then problems may arise.
The method of construction of houses in The Netherlands starts by putting up window frames and subsequently building brick walls around them. Therefore, during the construction phase, the primed wood is exposed to moisture (rain), cement and damages. Attention must, therefore, be paid to the performance of a waterborne coating in the first months after application.
It is known that waterborne coatings improve their performance after a longer drying time, but this may be critical if the film formation process has not been fully completed.Note de contenu : - Evaluation studies
- Chain gangs
- Legislation and emissions
- Better drying facilities
- Pigments affect dryingPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28039
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 192, N° 4455 (08/2002) . - p. 29-30[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 000322 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : A search for cobalt-free driers : Novel manganese and iron accelerators for alkyd curing Type de document : texte imprimé Auteurs : Karin Maaijen, Auteur ; Ronald Hage, Auteur Année de publication : 2017 Article en page(s) : p. 148-152 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cobalt -- Produits de remplacement
Ligands
Manganèse
Polyalkydes
Réticulants
Revêtement -- Séchage:Peinture -- Séchage
Séchoirs
SiccatifsUn siccatif est une substance qui joue un rôle de catalyseur en accélérant le séchage ou durcissement (polymérisation) d'un matériau tel une huile ou une peinture à base d'huile (pour le bâtiment ou les artistes).Index. décimale : 667.9 Revêtements et enduits Résumé : The potential reclassification of cobalt soaps as carcinogens under REACH legislation has prompted the search for cobalt alternatives, and led to the discovery and increased use of other metal-based driers Understanding the chemistry of suitable ligands and tailoring new siccative technologies gives paint formulators options in the event of future legislative changes. Note de contenu : - Need for alternative skinning agents
- Improving stability with Fe-bispidon based ligands
- Combining triazacyclononane-based ligands with Mn
- Faster paint drying by modifying side groups
- TPA combined with Mn and Fe accelerates curing
- Iron complexes hinder meko activity
- Tailored systems to maximise siccative technologies
- FIGURES : Simplified scheme of alkyd curing - Structure of bispidon ligand - 3. Structure of Me3TACN and Me4DTNE - Structures of several diazacycloheptane ligands discussed in this paper - Structure of tris(pyridine-2-ylmethyl)amine (TPA)En ligne : https://drive.google.com/file/d/12MRSJryT7xUha7FUY8VIhqLFCXqb6eqE/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28280
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 4 (04/2017) . - p. 148-152[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18809 - Périodique Bibliothèque principale Documentaires Disponible Silane-modified silicas as functional matting agents / Daniel Clingerman in COATINGS TECH, Vol. 18, N° 2 (02/2021)
[article]
Titre : Silane-modified silicas as functional matting agents Type de document : texte imprimé Auteurs : Daniel Clingerman, Auteur Année de publication : 2021 Article en page(s) : p. 32-36 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Agent mattant
Essais accélérés (technologie)
Formulation (Génie chimique)
Revêtement -- Séchage
Revêtements organiques
Silanes
SiliceLa silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux.
La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...).
Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale.
ViscositéIndex. décimale : 667.9 Revêtements et enduits Résumé : A new silica matting agent has been developed, featuring a mercapto silane-modified surface. Unlike traditional organically modified silicas, which utilize adsorbed waxes on the surface, silane modification offers a new opportunity to introduce reactive functionality into silica additives for coatings. With judicious pairing of surface functionality and resin chemistry, this functionalized surface opens the potential to react with the resin matrix. This paper will highlight this new class of functionalized silica for coatings and outline areas of potential application, with specific emphasis in cobalt (Co)-free alkyd formulations. Note de contenu : - General experimental details
- Results and discussion : 1. Drying time - 2. Viscosity - 3. Gloss reduction - 4. Initial weathering test
- Fig. 1 : Hydrolysis reaction of alkoxy silane under alkaline conditions and condensation of the hydrolyzed alkoxy silane to the silica surface
- Fig. 2 : Drying time comparisons of various silicas with Fe- or Mn-based drier packages. A dry time of 8h refers to the maximum amount of time measured in the experiment and does not account for full cure of the film
- Fig. 3 : Formulation viscosities were measured using a Haake rotational viscometer with a SV1ST spindle. QUL 5120 resins are typically measured at shear rate, D = 40.32 s1, or speed level 5-6
- Fig. 4 : Matting performance of various SAS types in Fe- and Mn-based alkyd systems over the course of 14 days
- Fig. 5 : Gloss retention in Fe-based alkyd systems under QUV-A exposure
- Fig. 6 : Gloss retention in Mn-based alkyd systems under QUV-1A exposure
- Table 1 : Drying starting point formulation from synthopol with iron (Fe)-and manganese (Mn)-based drier packagesEn ligne : https://drive.google.com/file/d/1KYr8pRIWKSh4f_cXXr0UkCTaKoOYKmyM/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35257
in COATINGS TECH > Vol. 18, N° 2 (02/2021) . - p. 32-36[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22580 - Périodique Bibliothèque principale Documentaires Disponible 22581 - Périodique Bibliothèque principale Documentaires Disponible Slot die-coated blue SMOLED multilayers / Sebastian M. Raupp in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 5 (09/2017)
[article]
Titre : Slot die-coated blue SMOLED multilayers Type de document : texte imprimé Auteurs : Sebastian M. Raupp, Auteur ; Lisa Merklein, Auteur ; Sebastian Hietzschold, Auteur ; Martin Zürn, Auteur ; Philip Scharfer, Auteur ; Wilhelm Schabel, Auteur Année de publication : 2017 Article en page(s) : p. 1029-1037 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Diodes électroluminescentes
Electronique -- Matériaux
Enduction
Microscopie à force atomique
Morphologie (matériaux)
Poly(3,4-éthylènedioxythiophène)
Polystyrène sulfone
Revêtement -- Séchage
Revêtements multicouchesIndex. décimale : 667.9 Revêtements et enduits Résumé : The key challenge in solution-processing efficient OLEDs is to realize the multilayer device architecture. We demonstrate that slot die coating is applicable to deposit small-molecule (SM) layers on top of each other without dissolving the underlying layer. A stack for a blue SMOLED is chosen comprising slot die-coated PEDOT:PSS, an SM emissive layer (EML) as well as an SM electron transport layer (ETL). The devices are fabricated in a sheet-to-sheet coating process with a slot die table coater under ambient conditions. While keeping the processing parameters constant for PEDOT:PSS and the EML, the composition of the ETL is varied. The choice of solvent for coating the ETL is crucial regarding wetting and dissolution of the underlying layer, solubility, surface roughness, and device efficiencies. Average roughness values down to 0.38 nm and peak to valley values around 10 nm were measured. Comparing device efficiencies of devices with and without ETL, an increase in efficiency with a factor up to 42 was achieved. In total, we show 135 blue SMOLEDs to demonstrate reproducibility. DOI : 10.1007/s11998-017-9964-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9964-z.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29138
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Code-barres Cote Support Localisation Section Disponibilité 19230 - Périodique Bibliothèque principale Documentaires Disponible Stress development and film formation in multiphase composite latexes / Kyle Price in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 6 (11/2014)
PermalinkStudies on the effect of cross-linker (HMMM) on aliphatic urethane oils synthesized using enzymatically modified castor oil / Vilas D. Athawale in PAINTINDIA, Vol. LV, N° 11 (11/2005)
PermalinkA study of new maganese complexes as potential driers for alkyd paints / E. Bouwman in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 4 (12/2007)
PermalinkStudying the drying and curing rates of acrylic automotive topcoats using dielectric analysis / David D. Shepard in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 68, N° 857 (06/1996)
PermalinkSyntheses and characterizations of two-component polyurethane flame retardant coatings using 2,4-dichloro modified polyesters / Chang-Hwan Park in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 69, N° 875 (12/1997)
PermalinkSynthesising a new cure for paint formulators / Claude Nootens in EUROPEAN COATINGS JOURNAL (ECJ), (07-08/2023)
PermalinkTaming the Michael addition reaction / Richard Brinkhuis in EUROPEAN COATINGS JOURNAL (ECJ), N° 5 (05/2015)
PermalinkThe impact of solvent characteristics on performance and process stability of printed carbon resistive materials / Bruce Philip in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 5 (09/2016)
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)
PermalinkTired of waiting for paint to dry ? in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 207, N° 4632 (06/2017)
PermalinkUnderstanding and improving painting processes / Joerg Zumkley in INTERNATIONAL SURFACE TECHNOLOGY (IST), Vol. 12, N° 3 (2019)
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