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Associative polymer/latex dispersion phase diagrams. II : HASE thickeners / Edward Kostansek in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 2, N° 6 (04/2005)
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Titre : Associative polymer/latex dispersion phase diagrams. II : HASE thickeners Type de document : texte imprimé Auteurs : Edward Kostansek, Auteur Année de publication : 2005 Article en page(s) : p. 417-422 Note générale : Bibliogr. Langues : Américain (ame) Tags : Stabilité colloïdale Polymère associatif Propriété thermodynamique Etude expérimentale Peinture Application Effet concentration Dispersion Groupe hydrophobe latéral Méthacrylate de méthyle copolymère aqueuse Acrylate butyle Epaississant Polyélectrolyte d'éthyle Méthacrylique acide Dimension particule Matériau revêtement Floculation Agent surface Diagramme phase Latex Index. décimale : 667.9 Revêtements et enduits Résumé : The colloidal interactions ofHASE associative polymers and latexes in the presence of surfactant are complicated and subject to a number of variables. Both bridging and depletion flocculation can occur, in addition to good particle dispersion. Dispersion phase diagrams have been developed to help visualize these interactions. The various dispersion states can have a significant effect on coating formulations and film properties. Examples of dispersion phase diagrams are presented for a model HASE anionic associative thickener and various model latexes in the presence of sodium dodecylsulfate and nonionic surfactants. The major variables affecting dispersion behavior are associative polymer concentration, latex particle size, latex surface hydrophobicity, electrolyte concentration, and surfactant concentration. The dispersion phase behavior of the HASE systems is compared to that of HEUR thickened systems reported previously. A significant difference is that much less bridging flocculation is observed in the HASE systems. In addition, nonionic surfactants induced depletion flocculation in the HASE systems but not in the HEUR systems. DOI : 10.1007/BF02733884 En ligne : https://link.springer.com/content/pdf/10.1007%2FBF02733884.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3836
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 2, N° 6 (04/2005) . - p. 417-422[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001483 - Périodique Bibliothèque principale Documentaires Disponible Associative polymer/particle dispersion phase diagrams III : Pigments / Edward Kostansek in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 3, N° 3 (07/2006)
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Titre : Associative polymer/particle dispersion phase diagrams III : Pigments Type de document : texte imprimé Auteurs : Edward Kostansek, Auteur Année de publication : 2006 Article en page(s) : p. 165-171 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Agents dispersants (chimie)
Brillance (optique)
Diagrammes de phases
Dioxyde de titane
Epaississants
Floculation
Hydrophobie
Latex
Polyacide méthacrylique
Polyacrylate d'éthyle
Polyéthers
Polyéthylène glycol
Revêtements -- Propriétés optiques:Peinture -- Propriétés optiques
Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- Additifs
ThermodynamiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : The colloidal interactions of both HEUR and HASE associative polymers with pigments in the presence of dispersant are complicated and subject to a number of variables. The objective of this work was to clarify the conditions needed to achieve good pigment dispersion in associative thickener systems by characterizing particle dispersion behavior. This had previously been done for latex particles, but not for pigments such as TiO2. Good dispersion leads to optical properties, such as gloss and hiding, that are superior to nonassociative thickener systems. Pigment dispersion phase diagrams represent a good way to visualize the complex interactions among pigments, dispersant, and thickener. The two most important variables were found to be pigment type (i.e., surface composition) and dispersant composition. Associative thickeners can yield good pigment dispersion or flocculation, depending on the correct matching of dispersants and pigment type. Because of the hydrophobic functional groups governing associative thickener behavior, dispersants having some hydrophobic character yielded the best pigment dispersions and optical properties because they could couple the pigment particles with the associative thickener network. Interior-grade TiO2 tended to yield better dispersions and optical properties than exterior-grade TiO2. Optimized associative thickener systems generally had improved optical properties over comparable nonassociative systems. Optical properties correlated well with particle dispersion behavior as displayed by the dispersion phase diagrams. DOI : 10.1007/BF02774506 En ligne : https://link.springer.com/content/pdf/10.1007%2FBF02774506.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3689
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 3, N° 3 (07/2006) . - p. 165-171[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 005076 - Périodique Bibliothèque principale Documentaires Disponible Controlled coagulation of emulsion polymers / Edward Kostansek in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 1, N° 1 (01/2004)
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Titre : Controlled coagulation of emulsion polymers Type de document : texte imprimé Auteurs : Edward Kostansek, Auteur Année de publication : 2004 Article en page(s) : p. 41-44 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Coagulation
Colloides
Copolymères en émulsion
Copolymérisation
Latex
Polyacrylate de butyle
Polyaddition
Polyméthacrylate de méthyleLe poly(méthacrylate de méthyle) (souvent abrégé en PMMA, de l'anglais Poly(methyl methacrylate)) est un polymère thermoplastique transparent obtenu par polyaddition dont le monomère est le méthacrylate de méthyle (MMA). Ce polymère est plus connu sous son premier nom commercial de Plexiglas (nom déposé), même si le leader global du PMMA est Altuglas International9 du groupe Arkema, sous le nom commercial Altuglas. Il est également vendu sous les noms commerciaux Lucite, Crystalite, Perspex ou Nudec.
PoudresIndex. décimale : 667.9 Revêtements et enduits Résumé : Coagulation of latex particles is most often carried out in the diffusion limited aggregation (DLA) regime where the time for coagulation to take place is on the millisecond timescale. This process produces aggregates of low density, irregular shape, and a broad particle size distribution. When the coagulation is carried out in the reaction limited aggregation (RLA) regime, a coagulation time of about 1-120 sec, the system can be controlled by mixing to yield dense, spheroidal aggregates with a very narrow particle size distribution. The important variables in the RLA process for butyl acrylate/methyl methacrylate (BA/MMA) latexes were found to be mixing intensity, latex copolymer composition, and coagulation temperature. Dried aggregates formed in the RLA process were found to have excellent powder flow properties and low dustiness. DOI : 10.1007/s11998-004-0023-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-004-0023-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3931
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Code-barres Cote Support Localisation Section Disponibilité 000585 - Périodique Bibliothèque principale Documentaires Disponible Controlling particle dispersion in latex paints containing associative thickeners / Edward Kostansek in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 4 (12/2007)
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Titre : Controlling particle dispersion in latex paints containing associative thickeners Type de document : texte imprimé Auteurs : Edward Kostansek, Auteur Année de publication : 2008 Article en page(s) : p. 375-388 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Agents dispersants (chimie)
Colloides
Dioxyde de titane
Dispersions et suspensions
Epaississants
Floculation
Latex
Pigments
Revêtements -- Propriétés optiques:Peinture -- Propriétés optiquesIndex. décimale : 667.6 Peintures Résumé : Latex paints contain several types of particles including polymer binder, primary pigment, extenders, and colorants. When the paints contain associative thickeners, control of particle dispersion can be very complicated due to the interaction of the particles with dispersants, surfactants, and the associative thickener itself. In particular, dispersion of the pigments can act independently of dispersion of the binder particles. The consequences of this situation are manifested in the physical properties of the paint and of the films it forms. This paper describes these interactions in terms of their colloid chemistry and shows the consequences of additive choices on the particle dispersion and also the optical properties of model paint films. DOI : 10.1007/s11998-007-9037-9 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-007-9037-9.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3626
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Code-barres Cote Support Localisation Section Disponibilité 009005 - Périodique Bibliothèque principale Documentaires Disponible Using dispersion/flocculation phase diagrams to visualize interactions of associative polymers, latexes, and surfactants / Edward Kostansek in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 75, N° 940 (05/2003)
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Titre : Using dispersion/flocculation phase diagrams to visualize interactions of associative polymers, latexes, and surfactants Type de document : texte imprimé Auteurs : Edward Kostansek, Auteur Année de publication : 2003 Article en page(s) : p. 27-34 Note générale : Bibliogr. Langues : Américain (ame) Tags : Polymère associatif Interaction intermoléculaire Dispersion Floculation Formulation Agent surface anionique Epaississant Adjuvant Latex Electrolyte polymère Diagramme phase Peinture Mécanisme réaction Index. décimale : 667.9 Revêtements et enduits Résumé : The colloidal interactions of associative polymers and latexes in the presence of surfactant is complex. This is because, in addition to good particle dispersion, both bridging and depletion flocculation can occur. Therefore, we have developed phase diagrams to help visualize these interactions. The various phases have a significant effect on coatings and applications properties. Examples of phase diagrams are presented for a model HEUR nonionic associative polymer and latexes in the presence of sodium dodecylsulfate. The major variables affecting phase behavior were found to be associative polymer concentration, latex particle size, latex surface hydrophobicity, and electrolyte, cosolvent, and surfactant concentrations. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5584
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Code-barres Cote Support Localisation Section Disponibilité 000565 - Périodique Bibliothèque principale Documentaires Disponible