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Versatile chemistry for improved heurs / Pol Storme in EUROPEAN COATINGS JOURNAL (ECJ), N° 10 (10/2015)
[article]
Titre : Versatile chemistry for improved heurs : A new generation of water-based associative rheology modifiers show performance gains Type de document : texte imprimé Auteurs : Pol Storme, Auteur ; Inge De Preter, Auteur ; John J. Rabasco, Auteur ; Daniel A. Saucy, Auteur ; Tara Conley, Auteur ; Jihui Guo, Auteur Année de publication : 2015 Article en page(s) : p. 38-45 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Epaississants
Opacifiants
Polyuréthane éthoxylé modifié de façon hydrophobe
Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- Additifs
Rhéologie
ViscositéIndex. décimale : 667.9 Revêtements et enduits Résumé : A technology termed "Acid Supression" allows efficient HEUR rheology modifiers to be supplied at high solids content, without the use of solvents or surfactants. This also allows different polymer structures to be created, which show a range of performance benefits. Note de contenu : - The problems of heur supply viscosity
- Different solutions to high supply viscosity issues
- Performance benefits of the new heurs
- Highly efficient mid-shear products
- Improved tinting and sag/levelling balance
- Hiding power improved in practical application
- Stable viscosity is attained more rapidly
- High shear viscosity obtained with less syneresis
- Aversatile technology with tailored productsEn ligne : https://drive.google.com/file/d/1GBHd0FAC_e-ouLZgdkO-FBbwweu9HJZM/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24705
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 10 (10/2015) . - p. 38-45[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17518 - Périodique Bibliothèque principale Documentaires Disponible Water soluble or not ? A simple question difficult to answer / Joachim Venzmer in SOFW JOURNAL, Vol. 149, N° 10 (10/2023)
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Titre : Water soluble or not ? A simple question difficult to answer Type de document : texte imprimé Auteurs : Joachim Venzmer, Auteur Année de publication : 2023 Article en page(s) : p. 62-66 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Eau
Epaississants
Micelles
Microplastiques
Polymères
Solubilité
SurfactantsIndex. décimale : 668.5 Parfums et cosmétiques Résumé : Solubility in water is an important property of surfactants for many purposes, including surface tension determination and (eco)toxicological studies. Surfactants have been categorized as “difficult to test”; the challenges associated with the determination of solubility in water will be discussed. OECD TG 105 is based on the definition of solubility in water as “saturation mass concentration”. For most surfactants, there is no saturation concentration, but rather formation of micelles or other surfactant aggregates. Unfortunately, there is a misconception that surfactant micelles are equivalent to droplets of hydrophobic material. This is not true, as there is a rapid exchange of surfactant molecules between those in a micelle and those present as single molecules in the bulk water – a true thermodynamic equilibrium. In addition, surfactants are able to solubilize hydrophobic substances within their micelles, enhancing their bioavailability. Note de contenu : - OECK technical guideline 105
- What is special about surfactants ?
- Micelles are a soluble state of surfactants
- Solubilization within micelles
- CMC = maximum solubility ?
- Example : associative thickenersEn ligne : https://drive.google.com/file/d/196QNgDqxllp1vUUilPrXKkzKbOMzkwKu/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40104
in SOFW JOURNAL > Vol. 149, N° 10 (10/2023) . - p. 62-66[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24240 - Périodique Bibliothèque principale Documentaires Disponible Waterborne latex coatings of color. III. Triblock polyether influences on color development and viscosity / David M. Mahli in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 1 (03/2007)
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Titre : Waterborne latex coatings of color. III. Triblock polyether influences on color development and viscosity Type de document : texte imprimé Auteurs : David M. Mahli, Auteur ; Daniel G. Phillips, Auteur ; J. Edward Glass, Auteur ; Jon M. Wegner, Auteur Année de publication : 2007 Article en page(s) : p. 31-41 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Colorants
Epaississants
Formulation (Génie chimique)
Latex
Noir de carbone
Polyéthylène glycol
Polyoxypropylène
Revêtements en phase aqueuse:Peinture en phase aqueuse
Rhéologie
Surfactants
ViscositéIndex. décimale : 667.9 Revêtements et enduits Résumé : Oxyethylene (PEO)/oxypropylene (PPO) triblock polymers are added to colorant formulations to determine the influence of molecular weight and other structural variances on the rheology and color development of tinted latex paints. Waterborne coatings are a matrix of many coating components. In this study, a 108- or a 600-nm latex was thickened with a nonassociative thickener, hydroxyethyl cellulose, or an associative telechelic HEUR thickener. Triblock polymers with internal PPO segments and PEO terminal segments added as a dispersant to colorant packages, lead to better color development than PPO/PEO/PPO triblocks dispersants in carbon black (CB) tinted paints. The increase in color development with high molecular weight (MW) triblocks starts at a very low concentration (2 mM) and plateaus in a Langmuir-type adsorption isotherm. Lower molecular weight triblock polymers also exhibit this behavior in CB-, red-, and yellow-tinted latex coatings; however, increasing the terminal PEO segment sizes leads to better color development only in the CB-tinted coatings. With large PEO terminal units red and yellow tints are high only at very low concentrations (2 mM) of the triblock. This parabolic response in color development, in contrast to CB-tinted formulations, is attributed to the high surface area and porosity of CB that limits the amount of large PEO segments interacting with the talc particle present at twice the volume fraction of the colorant. With the lower surface areas of the red and yellow colorants, the interaction of the large PEO terminal segments with talc particles accounts for the limited triblock concentration for which good color development is observed. This can be reversed by decreasing or eliminating talc from the formulation. DOI : 10.1007/s11998-007-9007-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-007-9007-2.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3668
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 4, N° 1 (03/2007) . - p. 31-41[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007149 - Périodique Bibliothèque principale Documentaires Disponible 008267 - Périodique Bibliothèque principale Documentaires Disponible Waterborne rheology modifiers : Improving thickening efficiency / M. Veeramani in PAINTINDIA, Vol. LXXII, N° 9 (09/2022)
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Titre : Waterborne rheology modifiers : Improving thickening efficiency Type de document : texte imprimé Auteurs : M. Veeramani, Auteur Année de publication : 2022 Article en page(s) : p. 109-113 Langues : Anglais (eng) Catégories : Epaississants
Latex
Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- Additifs
solvantsIndex. décimale : 667.6 Peintures Résumé : The impact of rheology modifiers on paint and coatings formulations has been, and continues to be immeasurable. This is especial ly true in architectural coatings as the choice of rheology modifier in most cases, determines the paint and film properties. Rheology modifiers used in the architectural paints include cellulose-based (water soluble polymers - HEC), poly-acryl ic-based (ASE and HASE) and ether-urethane polymer/polyether-based (H EU R/PEPO). Cellulose-based additives have been used to thicken paints and coatings for well over five decades. This class of rheology modifiers is relatively easy to formulate with without creating stability issues observed in the other classes of rheology modifiers. The thickening mechanism is by volume exclusion, resulting in the occurrence of flocculation — both pigment and latex - of the paint system. This may result in poor wet and dry hide film properties, as well as affect other paint film characteristics. However, the paint does not exhibit viscosity loss on tinting and colour stabilityy issues as is observed with the other type of thickeners. The poly-acrylic thickener was an attempt to provide the paint manufacturer with a liquid alternative to the cellulose-based rheology modifiers. The initial iteration was the alkali soluble emulsion, ASE, which was supplied as a low pH liquid to be incorporated as a dilute solution (1:1 with water) into the let-down phase of the paint batch making process. The thickening mechanism was similar to that of HEC. Their main advantages were ease of handl ing as well as the el imination of dust. Application properties such as spatter resistance, levelling, etc. were observed to be similar to, if not better than, paints thickened with HEC. Note de contenu : - Surfactants
- Latex
- Solvent
- Associative thickenersEn ligne : https://drive.google.com/file/d/14Vt_YATLIA-QGSDo1DeWw2cT7W9mk8R8/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38510
in PAINTINDIA > Vol. LXXII, N° 9 (09/2022) . - p. 109-113[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23747 - Périodique Bibliothèque principale Documentaires Disponible What does fumed silica do for adhesives and sealants compared to other thickeners ? / Dave Dun in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 25, N° 12 (12/2018)
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Titre : What does fumed silica do for adhesives and sealants compared to other thickeners ? Type de document : texte imprimé Auteurs : Dave Dun, Auteur Année de publication : 2018 Article en page(s) : p. 67 Langues : Américain (ame) Catégories : Colles:Adhésifs
Epaississants
Mastics
Silice fuméeIndex. décimale : 668.3 Adhésifs et produits semblables En ligne : https://www.adhesivesmag.com/articles/96618-ask-dr-dave-what-does-fumed-silica-d [...] Format de la ressource électronique : Texte Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32015
in ADHESIVES & SEALANTS INDUSTRY (ASI) > Vol. 25, N° 12 (12/2018) . - p. 67[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20973 - Périodique Bibliothèque principale Documentaires Disponible PermalinkPermalink