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Alkali-soluble resins (ASR) and acrylic blends : influence of ASR distribution on latex film and paint properties / Wenjun Wu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 4 (07/2016)
[article]
Titre : Alkali-soluble resins (ASR) and acrylic blends : influence of ASR distribution on latex film and paint properties Type de document : texte imprimé Auteurs : Wenjun Wu, Auteur ; Steve Severtson, Auteur ; Christopher Miller, Auteur Année de publication : 2016 Article en page(s) : p. 655-664 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alliages polymères
Bases (chimie)
Latex
Microscopie
Polyacryliques
Polymères -- Solubilité
Revêtements organiques
Revêtements:PeintureIndex. décimale : 667.9 Revêtements et enduits Résumé : Alkali-soluble resins (ASRs) are a special type of polymeric surfactant containing both hydrophobic moieties and carboxylic acid functional groups. Upon ionization, ASRs provide electrosteric stabilization to the latex particles, thus allowing reduction or even elimination of conventional surfactants while maintaining or improving latex stability. The distribution of ASR in the dried film depends on its miscibility with the latex polymer. Its presence in the blend system is expected to alter the film formation process and consequently performance properties of paint products based on the latex blends containing ASR. In this study, the effects of a high Tg, alkali-soluble resin (ASR), poly(styrene/alpha-methylstyrene/acrylic acid) terpolymer on the properties of latex and paint films were examined. The film formation of a soft acrylic latex in the absence and presence of the ASR was evaluated using a variety of analytical techniques. As expected, paint properties such as scrub resistance, wet adhesion, and block resistance were also affected by the inclusion of ASR. The results provide new insights into the structure and surface morphology of latex and paint films containing ASRs, as well as their impact on mechanical and the performance properties. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Characterization of polymers - Evaluation of paint films
- RESULTS AND DISCUSSION : Latex film formation in the presence of ASR - Tensile and elongation of acrylic polymer and ASR/AL blends - Contact angle (CA) of acrylic polymer and ASR/AL blends - Film morphology and ASR distribution via AFM - Quantitative analysis of ASR distribution by CRMDOI : 10.1007/s11998-016-9792-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9792-6.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26746
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 4 (07/2016) . - p. 655-664[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18223 - Périodique Bibliothèque principale Documentaires Disponible Latex design and coating film properties / Christopher Miller in EUROPEAN COATINGS JOURNAL (ECJ), N° 7-8 (07-08/2019)
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Titre : Latex design and coating film properties : A fundamental knowledge of structure-property relationships can aid the development of high-performance latex products Type de document : texte imprimé Auteurs : Christopher Miller, Auteur ; Wenjun Wu, Auteur Année de publication : 2019 Article en page(s) : p. 48-59 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adsorption
Analyse mécanique dynamique
Caractérisation
Latex
Lixiviation
Nettoyabilité
Polyacryliques
Produits de lixiviation
Revêtements -- Analyse:Peinture -- Analyse
Surfactants
TachesIndex. décimale : 667.9 Revêtements et enduits Résumé : Industry long ago developed a number of methods for testing paint performance, but these do not reflect real-world failure mechanisms. Combining mechanical testing with analytical techniques provides deeper insights into the basic mechanism driving the different performance observed in the industry standard tests. Note de contenu : - Time to delive deeper
- Experimental : Materials. Latex samples
- Paint formulations for three case studies
- Paint testing and analytical characterisation
- Dynamic mechanical analysis
- Confocal Raman microscopy
- Inductively coupled plasma-mass spectrometry
- Liquid chromatography-electrospray ionization-mass spectrometry
- Scanning electron microscope
- Case study 1 : Confocal techniques to investigate stain adsorption, stain penetration and stain removal
- CRM : Adsorption and penetration of grape juice stain
- Improving washability performance
- Case study 2 : Optimising block resistance and print resistance
- Surface contribution to block resistance
- Impact of viscoelastic properties on print resistance
- Controlling latex particle morphology to balance film formation and hardness
- Case study 3 : Reducing surfactant leaching (AKA "Snail trails" or "Snail tracks")
- Chemical analysis of leachates from paint A and paint B
- Film properties of paint A and paint B
- Technical solutions to surfactant leaching
- Scheme 1 : Typical product development cycle
- Table 1 : Acrylic polymers for case study 2
- Table 2 : Paint formulations used in three case studies
- Table 3 : Film properties of homogeneous vs. structured latexes
- Table 5 : Mg, K, and Na in dry leachates as percentages of their concentrations in paint serums
- Table 6 : Block resistance comparison for old and new acrylic binders in paint B
- Fig. 1 : CRM data of grape juice-shained paint I and paint II in relation to AE colour change
- Fig. 2 : Washability performance of Paint I and Paint II. (Stains from left to right : mustard, ketchup, hot coffee, red wine, blue ink).
- Fig. 3 : Effects of polymerisation surfactants on block and print resistance
- Fig. 4 : Frequency scans of HP-CY latex films at 25°C
- Fig. 5 : Frequency scans of SP-CY films with and without 5% Optifilm 400 at 25°C
- Fig. 6 : Photos of HP-CY and SP-CY paint films after LTC test
- Fig. 7 : Block and print resistance of SP-CY compared to commercial high-gloss paints
- Fig. 8 : Contributions of acrylic latex and paint formulation to surface leaching of paint B
- Fig. 9 : SEM images of cross-sections of paint A and paint BEn ligne : https://drive.google.com/file/d/1U--_Xuv8T_1aE0HVhiX0BJsRMaWQtOxE/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32796
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 7-8 (07-08/2019) . - p. 48-59[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21079 - Périodique Bibliothèque principale Documentaires Disponible