100% renewable ethoxylated surfactants / Steven Y. Chan in COATINGS WORLD, Vol. 23, N° 8 (08/2018)  

[article]  inCOATINGS WORLD > Vol. 23, N° 8 (08/2018) Titre : 100% renewable ethoxylated surfactants Type de document : texte imprimé Auteurs : Steven Y. Chan, Auteur ; Nathan Noyes, Auteur Année de publication : 2018 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Biosurfactants Éthoxylation alcools et phénols, généralement pour produire de puissants agents surfactants ou mouillants. Micelles Oxyde d'éthylène L'oxyde d'éthylène, ou 1,2-époxyéthane, oxyde de diméthylène, oxacyclopropane, ou encore oxirane est un composé organique, le plus simple de la classe des époxydes. Il est important pour l'industrie chimique, entre autres dans la production d'éthylène glycol, ainsi que dans les industries pharmaceutique et agroalimentaire. Ressources renouvelables Structure chimique Surfactants -- Synthèse Index. décimale : 667.9 Revêtements et enduits Résumé : As consumer awareness of the products and chemicals they use rises, many chemical companies are also striving to become more environmentally responsible. The trend in the coatings industry is toward low/zero VOC products, and many innovations in coatings technology are based on sustainable or green chemistries. The market increasingly demands the use of renewable ingredients to reduce the carbon footprint, and many chemical and coating manufacturers are striving to become more environmentally responsible. This trend is driven by a number of factors, including evolving consumer perceptions and awareness regarding the products and chemicals they use, regulatory/certification bodies and programs such as USDA BioPreferred®, and the growing implementation of corporate sustainability initiatives. Bio-based ethylene oxide (EO) will meet this demand by enabling the synthesis of various ethoxylated surfactants and emulsifiers which are 100% bio-based. Ethoxylation is a common process used to generate a range of products for emulsification and wetting, including ethoxylated alcohols, carboxylic acids and esters. While the hydrophobic portions of many of these surfactants are already naturally sourced from plant oils, only petrochemical-derived EO has been available in North America until this time. With the production of bio-based EO in the near future, ethoxylated products can now be produced from 100% bio-based content, allowing customers to choose fully renewable products without sacrificing performance. In addition, by incorporation into synthetic base materials, the bio-based content can be significantly increased, allowing formulators to meet challenging new targets. Note de contenu : - Surfactant fundamentals - The issue of petroleum feedstocks - USDA bio - Preferred program - Renewable surfactants - Fig. 1 : General surfactant structure - Fig. 2 : pherical micelle of surfactant in water - Fig. 3 : Surfactant classification - Fig. 4 : Global greenhouse gas emission - Fig. 5 : The carbon dioxide cycle - Fig. 6 : Minimum bio-based content for USDA BioPreferred program - Fig. 7 : Illustration of oleochemical derivatives - Fig. 8 : BrijTM surfactant – C12 linear alcohol ethoxylate - Fig. 9 : TweenTM 20, ethoxylated sorbitol - Fig. 10 : MyrjTM, ethoxylated fatty acids and CrodafosTM, ethoxylated phosphate esters - Fig. 11 : New Bio-based EO plant in Delaware - Fig. 12 : Petroleum-based and bio-based processes for ethylene oxide - Fig. 13 : Flow diagram of an integrated Ethanol-to-EO/EG Process - Fig. 14 : 100% renewable surfactant En ligne : https://www.coatingsworld.com/issues/2018-08-01/view_features/100-renewable-etho [...] Format de la ressource électronique : Html Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32516 [article]

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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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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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