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A question of distribution / Yves Holl in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 192, N° 4448 (01/2002)

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 192, N° 4448 (01/2002) . - p. 16-23 Titre : A question of distribution Type de document : texte imprimé Auteurs : Yves Holl, Auteur Année de publication : 2002 Article en page(s) : p. 16-23 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Formation de film Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- Additifs Revêtements en phase aqueuse -- Séchage:Peinture en phase aqueuse -- Séchage Surfactants Index. décimale : 667.9 Revêtements et enduits Résumé : Waterborne organic coatings can be improved thanks to a better understanding of how small molecules affect their properties. Waterborne coatings often contain small molecules (with low molecular weight as opposed to the macromolecules forming the matrix), wheter intentionally or not. These small molecules can be, for instance, undesirable residual monomers or oligomers; or they can be voluntary added formulation additives such as wetting agents, crosslinkers, adhesion promoters, plasticisers, coalescents, stabilisers or texturing agents. These molecules have a profound influence on properties. Not only do the small molecules affect properties through their total amount, but also, at a given concentration, through their distribution in the film. For example, if a small molecule, such as a surfactant, accumulates at the film-substrate interface of a water-borne coating, adhesion propertiesn especially in wet conditions, are strongly affected. Another example is food packaging and food can varnishes, where non-polymeric molecules should not migrate to the surface in contact with food. Note de contenu : - Distribution control - Film formation - Emulsion experiment - Drying behaviour - White state - Surfactant distribution - Collaborative research Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28100 [article]

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The finest way to grind / David Tomlinson in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 192, N° 4448 (01/2002)

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 192, N° 4448 (01/2002) . - p. 24-37 Titre : The finest way to grind Type de document : texte imprimé Auteurs : David Tomlinson, Auteur Année de publication : 2002 Article en page(s) : p. 24-37 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Broyeurs Fragmentation Nanoparticules Séparation (technologie) Index. décimale : 667.9 Revêtements et enduits Résumé : Increasingly stringent health and safety regulations require finer printing on labels to maintain clarity and brand identity. The author discovers how nanoparticle technology can help manufacturers. Contrary to the well-known chemical bottom-up processes from the gas or liquid phase, superfine grinding in agitator mills is a process from the top or top-down. Starting from several micrometres, suspended particles can be milled to an average fineness of 40-100nm. Note de contenu : - Agitator mill technology - Superfine development - Technology theory - Bead sizes - Modern agitator bead mills - Process modes - Applications - Distinction - FIGURES : 1. Fineness as a function of grinding bead size and duration of processing - 2. The ZETA circulation grinding system - 3. Centrifugal separation systems can be used for continuous operation of an agitator mill - 4. Representation of the dispersion and conversion process of phthalocyanine blue - 4. Grinding process of phthalocyanine blue - TABLE : 1. Assessment of different grinding beat type with respect to wear behaviour Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28101 [article]

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