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Effect of itaconic acid on the wet scrub resistance of highly pigmented paints for architectural coatings / Mauricio Pinheiro de Oliveira in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 8, N° 4 (07/2011)
[article]
Titre : Effect of itaconic acid on the wet scrub resistance of highly pigmented paints for architectural coatings Type de document : texte imprimé Auteurs : Mauricio Pinheiro de Oliveira, Auteur ; Caroline Reggiani Silva, Auteur ; Lilia Müller Guerrini, Auteur Année de publication : 2011 Article en page(s) : p. 439-447 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Itaconique, Acide
Latex
Pigments
Polymérisation en émulsion
Résistance aux frottements humides
RevêtementsTags : 'Latex fonctionnalisé' 'Résistance à la friction' 'Acide itaconique' 'Polymérisation en émulsion' 'Peintures hautement pigmentées' Index. décimale : 667.9 Revêtements et enduits Résumé : This study investigates the influence of carboxylic monomers, such as itaconic acid (IA), on the colloidal properties of the latexes made by semi-continuous emulsion copolymerization of styrene (STy) with n-butyl acrylate (BA). A number of copolymerization runs were carried out with different IA concentrations. The effect of functional monomer on the overall conversion, the colloidal properties of the latexes, and the distribution of the carboxylic groups (buried, particle surface and aqueous phase) were examined. The carboxylic groups present in the latexes were analyzed using conductimetric and potentiometric titrations. The behavior of the IA on the wet scrub resistance of highly pigmented paints for architectural coatings was examined and correlated with the distribution of the carboxylic groups. The results obtained showed that the properties of highly pigmented paints are greatly dependent on the amount and distribution of the carboxylic groups. The carboxylic acid distributed in the aqueous phase has a strong influence on the wet scrub resistance and on the characteristics of the final products. Note de contenu : EXPERIMENTAL : Materials - Polymerization - Composition and paint formulation
CHARACTERIZATIONS : Particle size analysis - Viscosity and pH - Coagulum formation - Freeze-thaw stability - Carboxylic group distribution - Web scrub test - Optical property
RESULTS AND DISCUSSION : Overall conversion and particle size - Distribution of carboxyl groups - Scrub resistance of dried paint filmDOI : 10.1007/s11998-010-9317-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-010-9317-7.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12131
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Code-barres Cote Support Localisation Section Disponibilité 013158 - Périodique Bibliothèque principale Documentaires Disponible Effect of particle size distribution on stress development and microstructure of particulate coatings / Yan Wu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 2 (03/2017)
[article]
Titre : Effect of particle size distribution on stress development and microstructure of particulate coatings Type de document : texte imprimé Auteurs : Yan Wu, Auteur ; Lorraine F. Francis, Auteur Année de publication : 2017 Article en page(s) : p. 455–465 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Carbonate de calcium broyé
Copolymère styrène acrylate
Dispersions et suspensions
Granulométrie
Latex
Liants
Microstructures -- Analyse
Particules (matières)
Revêtement -- SéchageIndex. décimale : 667.9 Revêtements et enduits Résumé : The role of pigment particle size distribution on stress and microstructure development was studied for coatings prepared from aqueous suspensions of ground calcium carbonate (GCC) and latex binder. Stress development was monitored using a modified beam deflection technique under controlled environment. Microstructure was characterized by scanning electron microscopy (SEM) and cryogenic SEM. For coatings containing only GCC particles and no latex, a wide particle size distribution resulted in a significant particle size gradient in the cross-sectional microstructure and irregular stress development. With latex addition, uniform microstructures were observed in coatings with either wide or narrow GCC particle size distribution. GCC/latex coatings prepared using GCC with a wide particle size distribution developed a higher stress than those prepared using GCC with a similar average particle size but a narrow particle size distribution. The higher stress is related to the particle packing that results in smaller pore sizes and larger capillary pressures that drive compaction. In coatings prepared with the same GCC particles but different latex binders, the stress and cracking behavior of the coating depends on the latex properties. Note de contenu : - MATERIALS AND METHODS : Suspension systems - Drying stress measurement - Microstructure characterization
- RESULTS AND DISCUSSION : Coatings prepared from GCC suspensions - Coatings prepared with GGC and styrene acrylate latex - Coatings prepared with GCC-W and different types of latexDOI : 10.1007/s11998-016-9866-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9866-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28160
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Code-barres Cote Support Localisation Section Disponibilité 18781 - Périodique Bibliothèque principale Documentaires Disponible Effects of glycidyl methacrylate content and addition sequence on the acrylic latexes with carboxyl groups / Guofeng Qin in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 6 (11/2016)
[article]
Titre : Effects of glycidyl methacrylate content and addition sequence on the acrylic latexes with carboxyl groups Type de document : texte imprimé Auteurs : Guofeng Qin, Auteur ; Guozhang Ma, Auteur ; Caiying Hou, Auteur ; Jianbing Wu, Auteur ; Tingfa Yi, Auteur ; Ruofei Zhang, Auteur ; Hui Zhang, Auteur ; Xiaogang Hao, Auteur Année de publication : 2016 Article en page(s) : p. 973-980 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Epoxydes
Groupement carboxyle
Latex
Méthacrylate de glycidyle
Polyacryliques
Polymères -- Synthèse
Polymérisation en émulsion
Réticulation (polymérisation)Index. décimale : 667.9 Revêtements et enduits Résumé : Acrylic latexes with epoxy and carboxyl groups have been synthesized via a two-stage emulsion polymerization process. Different contents of glycidyl methacrylate (GMA) were introduced by three addition modes to copolymerize with methyl methacrylate, butyl acrylate, acrylic acid (AA) in the presence of K2S2O8. To obtain stable latexes, NaHCO3 was employed as a buffer to compensate for the acidity from the thermal dissociation of K2S2O8, and triethylamine was used to neutralize the carboxyl acid from AA. The results showed that the stable latexes with core/shell structure were synthesized by this method, and higher GMA content or addition at earlier stage led to forming the latexes with higher content of coagulum and bigger sized particles. During the formation of films, the polymer epoxy groups underwent the crosslinking reaction with carboxyl acid. When the GMA content increased or GMA was introduced at a later stage, high crosslinking extent was formed in the films. As a result, the crosslinking provided the films with improved water resistance, chemical resistance, tensile strength, hardness, abrasion resistance, and thermal stability. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of acrylic latexes - Preparation of acrylic films - Measurements and characterization
- RESULT AND DISCUSSION : Effect of the GMA on the properties of the latexes - Effect of GMA on the properties of the latex filmsDOI : 10.1007/s11998-016-9808-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9808-2.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27244
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Code-barres Cote Support Localisation Section Disponibilité 18514 - Périodique Bibliothèque principale Documentaires Disponible Effects of latex and thickener polarities on rheology and phase stability of latex-HEUR mixtures / Travis B. Smith in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 4 (07/2023)
[article]
Titre : Effects of latex and thickener polarities on rheology and phase stability of latex-HEUR mixtures Type de document : texte imprimé Auteurs : Travis B. Smith, Auteur ; David Chisholm, Auteur ; Abby Cheng, Auteur ; Juan Ortiz Salazar, Auteur ; Lia Roccucci, Auteur ; Bailey Morales, Auteur ; Gary Dombrowski, Auteur ; John J. Rabasco, Auteur ; Patrick Hartnett, Auteur ; Ray Fernando, Auteur Année de publication : 2023 Article en page(s) : p. 1311-1324 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cisaillement (mécanique)
Epaississants
Epaississement
Floculation
Latex
Polyuréthane éthoxylé modifié de façon hydrophobe
Revêtements en phase aqueuse:Peinture en phase aqueuse
Rhéologie
SynérèseEn chimie, la synérèse définit la séparation d'un liquide de son gel.Index. décimale : 667.9 Revêtements et enduits Résumé : In this study, hydrophobically modified, ethoxylate urethanes (HEURs) and latexes of well-defined structure and composition were used to examine the rheology and phase behavior of HEUR–latex mixtures. The mixtures comprised one of four HEURs that were synthesized with varying molecular weight polyethylene glycols (PEG 35 K, 20 K, 12 K, and 8 K) and end-capped with octadecyl hydrophobes, as well as one of two latexes (butyl acrylate/styrene [BA-Sty] and butyl acrylate/methyl methacrylate [BA-MMA]) that each contained a small amount of methacrylic acid. The two experimental latexes represent compositions commonly used in commercial paint formulations. The polarity of the HEURs decreases as the PEG molecular weight decreases and the surface of the styrene containing latex is less polar than that containing methyl methacrylate. In all HEUR–latex mixtures, the latex polymer volume fraction was maintained constant at 0.25 which provides a dispersed component spatial crowdedness that represents a fully formulated paint. All latex–HEUR mixtures were stable at very low (i.e., below 0.10% by weight) HEUR levels. At critical concentrations dependent on the polarity of thickener and latex, flocculation was accompanied by syneresis for latex-thickener mixtures prepared with all HEURs except the one with the longest PEG spacer. Further increase of HEUR levels revealed another critical concentration above which the mixtures were stable. Effects of the latex polarity diminished for the mixtures prepared with more hydrophobic HEURs. Note de contenu : - HEUR C18-EO795 and latex mixtures
- HEUR C18-EO455 and latex mixtures
- Table 1 : Compositions and molecular weights (determined by GPC) of model HEURs
- Table 2 : Properties of model latexes
- Table 3 : Compositions of representative latex–HEUR mixtures
- Table 4 : Visual assessment of stability of latex–HEUR samples after 6–8 days of equilibration
- Table 5 : Number of HEUR molecules available per BA-Sty latex particle
- Table 6 : Latex surface area (nm2) claimed by a HEUR hydrophobe, assuming one of the hydrophobes from every HEUR molecule is adsorbeDOI : https://doi.org/10.1007/s11998-022-00746-3 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00746-3.pdf?pdf=button% [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39718
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Code-barres Cote Support Localisation Section Disponibilité 24153 - Périodique Bibliothèque principale Documentaires Disponible Elaboration de latex par polymérisation par métathèse en milieux aqueux / Valérie Heroguez in ACTUALITES G.F.P., N° 99 (10/2004)
[article]
Titre : Elaboration de latex par polymérisation par métathèse en milieux aqueux Type de document : texte imprimé Auteurs : Valérie Heroguez, Auteur Année de publication : 2004 Article en page(s) : p. 4-5 Note générale : Bibliogr. Langues : Français (fre) Catégories : Latex
Métathèse (chimie)
Polymérisation en émulsionIndex. décimale : 668.9 Polymères Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=6338
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Code-barres Cote Support Localisation Section Disponibilité 005853 - Périodique Bibliothèque principale Documentaires Disponible Electron microscope studies of leather-polymer systems / John R. Barlow in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 57 (Année 1973)
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