High-performance pigment dispersant additives improve pigment wetting and dispersion in waterborne coatings / Ernest C. Galgoci in COATINGS TECH, Vol. 4, N° 5 (05/2007)  

[article]  inCOATINGS TECH > Vol. 4, N° 5 (05/2007) . - p. 30-36 Titre : High-performance pigment dispersant additives improve pigment wetting and dispersion in waterborne coatings Type de document : texte imprimé Auteurs : Ernest C. Galgoci ; Khalil Yacoub ; Mauricio F. Misdrahi ; K. Michael Peck ; Wim P. Stout ; Steven Y. Chan Année de publication : 2007 Article en page(s) : p. 30-36 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Agents dispersants (chimie) Dioxyde de titane Ethoxylate d'alkylphénol Mouillage (chimie des surfaces) Noir de carbone Oxyde de fer Pigments Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- Additifs Index. décimale : 667.9 Revêtements et enduits Résumé : A new family of high-performance pigment dispersant additives has been developed to improve pigment wetting and dispersion in waterborne coatings. These unique additives are highly effective for a wide range of organic and inorganic pigments in both resin-free and resinous pigment grinds, where they provide increased pigment loading, improved color development, and enhanced stability. Additional advantages of these new additives versus traditional and other high-performance dispersants include low foam; effective pigment stabilization; outstanding pigment wetting; high color development; and environmental benefits as they are HAPs- and alkylphenol ethoxylate (APE)-free. These new additives are applicable to automative, architectural, industrial, and wood coatings. En ligne : https://drive.google.com/file/d/1dKhhZSReVx1tDYXRo6kIK-dr64a7jzlH/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18459 [article]

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Improving the odds of success : Using a benign-by-design approach to product development / Ingrid K. Meier in COATINGS TECH, Vol. 20, N° 2 (03-04/2023)  

[article]  inCOATINGS TECH > Vol. 20, N° 2 (03-04/2023) . - p. 32-38 Titre : Improving the odds of success : Using a benign-by-design approach to product development Type de document : texte imprimé Auteurs : Ingrid K. Meier, Auteur ; Carrie E. Hamilton, Auteur ; Andrew W. Wang, Auteur ; Gauri S. Lal, Auteur ; Khalil Yacoub, Auteur Année de publication : 2023 Article en page(s) : p. 32-38 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Agents mouillants Diol acétylénique Hydroxythioéther Revêtements (produits chimiques) Surfactants Thioéther Index. décimale : 667.9 Revêtements et enduits Résumé : In the concept stage, the team chose to focus on three classes of molecules it believed were most likely to lead to the fastest and least expensive path to achieving global registration for a new lower molecular weight surfactant. Note de contenu : - Fig. 1 : Low-foam surfactant structures - Fig. 2 : Chemical structure design to minimize branching while improving ecotoxicity - Fig. 3 : Optimized aquatic toxicity and biodegradability can be achieved for dynamic wetting agents with a series of hydroxythioether surfactants - Fig. 4 : Prototype U136 provides dynamic surface tension reduction close to that seen with the most efficient dynamic wetting agent on the market - Fig. 5 : Extremely hydrophobic glycidyl ether-capped acetylenic diol surfactants become less aquatically toxic - Fig. 6 : Extremely hydrophobic thioether-based surfactants become less aquatically toxic - Fig. 7 : Comparison of Ross-Miles foam test performance of 0.1 wt. % aqueous solutions of U136 and T115 versus competitive benchmark surfactants - Fig. 8 : Thioether T115 performs as a strong molecular defoamer En ligne : https://www.coatingstech-digital.org/coatingstech/mar-apr_2023/MobilePagedArticl [...] Format de la ressource électronique : Html Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38968 [article]

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Innovative, gemini-type molecular defoamer technology for improved coating aesthetics / Ernie C. Galgoci in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 3, N° 1 (01/2006)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 3, N° 1 (01/2006) . - p. 77-85 Titre : Innovative, gemini-type molecular defoamer technology for improved coating aesthetics Type de document : texte imprimé Auteurs : Ernie C. Galgoci, Auteur ; Steven Y. Chan, Auteur ; Khalil Yacoub, Auteur Année de publication : 2006 Article en page(s) : p. 77-85 Note générale : Bibliogr. Langues : Américain (ame) Tags : Agent  surface  gemini  Etude  expérimentale  Relation  formulation  propriété  Démoussage  Evaluation  performance  Diol  Composé  acétylénique  non  ionique  Antimoussant  Additif  Peinture  eau  Matériau  revêtement Index. décimale : 667.9 Revêtements et enduits Résumé : The use of conventional surfactants and defoamers in waterbome coatings can often create an undesirable cycle, whereby each imparts a negative effect that requires the other to solve. Molecular defoamers represent a novelclass of defoamers that break foam on a molecular level, which is unlike conventional defoamers that utilize macroscopic physical incompatibility within a coating formulation. This is accomplished by the ability of the molecular defoamer to adsorb at the air-water interface of a foam bubble and, thereby, displace some of the surfactants that stabilize the foam. Based on a fundamental understanding of the effects of basic adsorption parameters, innovative nonsilicone molecular defoamers were developed that provide long-term foam control, effectively reduce both surface tension and foam in a variety of emulsion polymers, and decrease significantly the level of defects in waterbome coating applications. A synergistic performance benefit was obtained when these molecular defoamers were used in combination in an acrylic, industrial maintenance formulation. DOI : 10.1007/s11998-006-0008-3 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-006-0008-3.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3723 [article]

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Multifunctional, gemini-type coalescing surfactants enable formulation of lower VOC waterborne coatings / Ernie C. Galgoci in COATINGS TECH, Vol. 3, N° 1 (01/2006)  

[article]  inCOATINGS TECH > Vol. 3, N° 1 (01/2006) . - p. 34-42 Titre : Multifunctional, gemini-type coalescing surfactants enable formulation of lower VOC waterborne coatings Type de document : texte imprimé Auteurs : Ernie C. Galgoci, Auteur ; Steven Y. Chan, Auteur ; Kenneth A. Yoxheimer, Auteur ; Roger Reinartz, Auteur ; Virendra V. Shah, Auteur ; Khalil Yacoub, Auteur Année de publication : 2006 Article en page(s) : p. 34-42 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 667.9 Revêtements et enduits Résumé : Increasingly, surfactants with multifunctional performance benefits are desired to not only lower the surface tension of waterborne formulations, but also to reduce foam. Low HLB, nonionic Gemini-type surfactants are commonly utilized for this reason. As legislation has required coatings with increasingly lower volatile organic compounds (VOCs) and, consequently, lower coalescent levels, the ability of Gemini surfactants to reduce the minimum film formation temperature (MFFT) of emulsion polymers has garnered interest as a means to enable formulation of lower VOC coatings. This article describes the MFFT reduction imparted by Gemini-type surfactants for a wide variety of emulsion polymers. Atomic force microscopy (AFM) showed that films prepared using an alkyl ester (AE) surfactant were generally smoother than films not containing the AE surfactant. While enabling low-VOC formulating, these surfactants were found to have minimal effect on coating performance. Lower HLB surfactants were found to be the most effective coalescents. A simple model whereby these surfactants preferentially adsorb onto the surface of the polymer particles is introduced to explain their efficiency. En ligne : https://drive.google.com/file/d/1-gveKkWu2e9yAbg6qVKfAw3AkMLU-nHY/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5493 [article]

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