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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Highly effective emulsion processes for low to zero VOC epoxy emulsions / Jonathan Huang in PAINTINDIA, Vol. LXVII, N° 9 (09/2017)  

[article]  inPAINTINDIA > Vol. LXVII, N° 9 (09/2017) . - p. 72-76 Titre : Highly effective emulsion processes for low to zero VOC epoxy emulsions Type de document : texte imprimé Auteurs : Jonathan Huang, Auteur ; Wolfgang Geuking, Auteur ; Steven Chan, Auteur ; Nathan Noyes, Auteur ; Jo Grade, Auteur Année de publication : 2017 Article en page(s) : p. 72-76 Langues : Anglais (eng) Catégories : Brillance (optique) Dureté (matériaux) Emulsions Epoxydes Essais (technologie) Polymérisation en émulsion Résistance chimique Revêtements en phase aqueuse:Peinture en phase aqueuse Index. décimale : 667.9 Revêtements et enduits Résumé : Water borne epoxy resins are gaining popularity in many applications, not the least due to their low or even zero content of volatile organic compounds (VOC). This paper is aiming at describing the principles of epoxy resin emulsification as well as demonstrating the practical ways to produce such emulsions in a variety of different equipments. Note de contenu : - Plan of trials - Emulsion properties - Paint properties - Hardness - Gloss - Chemical resistance toughness En ligne : https://drive.google.com/file/d/1hO7z1EkMjhwt1P7WXbVBUp4x11OE4O_D/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29332 [article]

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Sustainable polyurethanes are here to stay / Wolfgang Geuking in EUROPEAN COATINGS JOURNAL (ECJ), N° 4 (04/2021)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 4 (04/2021) . - p. 34-38 Titre : Sustainable polyurethanes are here to stay : Bio-based polyols provide flexible, versatile multi-substrate solutions Type de document : texte imprimé Auteurs : Wolfgang Geuking, Auteur ; Nathan Noyes, Auteur ; Eric Brouwer, Auteur Année de publication : 2021 Article en page(s) : p. 34-38 Langues : Anglais (eng) Catégories : Biopolymères Colles:Adhésifs Durée de vie (Ingénierie) Matériaux -- Allègement Polyesters Polyols Polyuréthanes Résistance à l'humidité:Résistance à l'eau Résistance thermique Index. décimale : 667.9 Revêtements et enduits Résumé : The polyester polyols presented in this paper are based on C36-dimer acids from natural oils, giving these products high renewable content. To meet industry's need to move towards sustainable and bio-based materials, a new portfolio of 100 0/0 bio-based-polyester polyols have been developed. The branched non-crystalline dimer-acid structure offers (low temperature) flexibility, prevents strain-induced crystallisation and enhances wetting properties, while the hydrocarbon character imparts water repellence and affinity for a wide range of substrates. Furthermore, they provide a unique combination of enhanced hydrolytic and thermo-oxidative stability, which is highly relevant for demanding applications such as transportation and electronic adhesives or renewable energy systems. Note de contenu : - Changing needs for a changing world - Bio-based-polyol technology - New 100% bio-ased polyols for polyurethane adhesives - Highly durable polyurethane adhesives - Exposure trials - Flexibility and reduced flex fatigue - Versatile adhesion - Life-cycle analysis - Measuring bio-content - Sustainability in use - Fig. 1 : Thermo-oxidative and hydrolytic resistance of bio-based, reactive PU-adhesive films - Fig. 2 : Elongation curves for adhesives films - Fig. 3 : Adhesion to a variety of difficult to bond substrates - Fig. 4 : Adhesion to polycarbonate - Fig. 5 : Adhesion after exposure to high humidity - Fig. 6 : Typical life-cycle analysis of cumulated CO2 equivalent absorption and emissios for fossil fuel-based and biobased products - Fig. 7 : Reduced fuel consumption due to light weightingin cars, enabled by bio-based adhesives - Table 1 : Bio-based-polyol grades En ligne : https://drive.google.com/file/d/1UT0AfpRUKppLatm1Mmz-nFvGy9COVskO/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35862 [article]

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