Defoamer selection in waterborne coatings / Robin A. Reinhardt in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 70, N° 885 (10/1998)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 70, N° 885 (10/1998) . - p. 157-160 Titre : Defoamer selection in waterborne coatings Type de document : texte imprimé Auteurs : Robin A. Reinhardt, Auteur ; Wernfried Heilen, Auteur ; Ellen Walhorn, Auteur ; Stefan Silber, Auteur ; Jay W. Adams, Auteur Année de publication : 1998 Article en page(s) : p. 157-160 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antimousse Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- Additifs Index. décimale : 667.9 Revêtements et enduits Résumé : Waterborne coatings systems differ from solventborne systems in a number of ways. One key difference is the fact that water displays a high surface tension, which must be lowered to allow spreading over low-energy substrates. But solving this problem often leads to another problem: the surfactants used to lower surface tension tend to stabilize foam. This foam, in turn, must be destabilized during manufacture and application through the use ofa defoamer. Choosing the proper defoamer for any given system has always been a matter of empirical selection. But today, new methods of analysis can help with that selection process. This article presents new and existing research in the areas offoam control and defoamer selection that can help minimize the amount of empirical work needed. Note de contenu : - FOAM CONTROL - CAUSES OF FOAM - DEFOAMER CHEMISTRY FOR AQUEOUS SYSTEMS : Active substances - Surface-active agents - Carrier fluids - FACTORS THAT INFLUENCE DEFOAMER SELECTION - WHAT DETERMINES DEFOAMER EFFICIENCY - DEFOAMER INCORPORATION - TEST METHODS - DEFOAMER EMULSIONS VERSUS COMPOUNDS - DEFOAMER PERSISTENCE AND STORAGE STABILITY Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18046 [article]

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Organosilicone surfactants : Properties, chemistry, applications / Jay W. Adams in PAINTINDIA, Vol. XLVI, N° 10 (10/1996)

[article]  inPAINTINDIA > Vol. XLVI, N° 10 (10/1996) . - p. 31-37 Titre : Organosilicone surfactants : Properties, chemistry, applications Type de document : texte imprimé Auteurs : Jay W. Adams, Auteur Année de publication : 1996 Article en page(s) : p. 31-37 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Peinture  eau'  Encre  Adjuvant  'Polymère  silicium'  'Siloxane(diméthyl)  polymère'  'Siloxane  copolymère'  'Agent  surface'  Antimoussant Index. décimale : 667.9 Revêtements et enduits Résumé : Co-polymerisation of chemically inert, temperature stable and highly flexible dimethylpolysiloxanes with soluble, physical + chemical interactive and even chemically reactive organic components yields organo silicone surfactants having a wide array of uses in water based coatings and ink formulations. Primary uses include defoaming, deaerating, improved substrate wetting and enhances slip properties. Organosilicone surfactants can be characterised by their degree of solubility, mobility in liquid systems, functionality and molecular stability yet similar solubility characteristics and function. Emphasis is placed on the use of organo silicone surfactants as defoamers. Differences between defoaming and deaerating are illustrated. Relationships between mar resistance, slip properties, surface tension and adhesion are discussed. In types of modifications leading to new classes of reactive surfactants is presented. Note de contenu : BUILDING SURFACTANTS : Properties of silicones - Types of organo modification -Properties of organo silicones - Uses of organo silicones - DEFOAMING VS. DEARERATING - SURFACE WETTING - FLOATING AND FLOODING - SLIP PROPERTIES - NEW DEVELOPMENT IN ORGANO CHEMISTRY Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13525 [article]

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