Can waterborne acrylics replace solventborne alkyds in wood coatings ? / Anne-Sophie Hesry in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 203, N° 4583 (04/2013)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 203, N° 4583 (04/2013) . - p. 24-26 Titre : Can waterborne acrylics replace solventborne alkyds in wood coatings ? Type de document : texte imprimé Auteurs : Anne-Sophie Hesry, Auteur Année de publication : 2013 Article en page(s) : p. 24-26 Langues : Anglais (eng) Catégories : Bois -- Revêtements Polyacryliques Revêtements en phase aqueuse:Peinture en phase aqueuse Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : Wood has long been used as a sustainable building material for thousands of years ; however, it needs to be coated with a variety of products giving it protection against the elements and for decorative effect. Solvent-based alkyd coatings have proved to be very effective at protecting wood against the negative effects of the environment and solvent-based (SB) alkyds are still widely used for the production of high quality gloss paints and varnishes. However, the use of these materials is now being curtailed due to their high solvent content and the need to comply with legislation restricting the levels of Volatile Organic Compounds (VOCs) in decorative paints. For example, the European Directive 2004/42/EC now limits the VOC content in gloss trim paints to 300g/lit, see Table 1 for more details. In order to achieve an acceptably low viscosity at high solids, it has been necessary to use lower molecular weight and increased oil content alkyd resins with the consummate poor drying and increased yellowing. In response to this, paint producers are now moving towards waterborne (WB) systems such as alkyd emulsions and acrylic dispersions with much lower VOC levels. En ligne : https://drive.google.com/file/d/1JivrqS7_FTnKpgo7i2ye-AM-PSw3BDJL/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18348 [article]

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Solving a volatile problem / Anne-Sophie Hesry in EUROPEAN COATINGS JOURNAL (ECJ), N° 12 (12/2017)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 12 (12/2017) . - p. 30-34 Titre : Solving a volatile problem : New liquid polybutadiene polymer replaces solvent and improves application Type de document : texte imprimé Auteurs : Anne-Sophie Hesry, Auteur ; Stacey Syron, Auteur ; Malcolm McInnes, Auteur Année de publication : 2017 Article en page(s) : p. 30-34 Langues : Anglais (eng) Catégories : Bois -- Revêtements Formulation (Génie chimique) Liants Pénétration (physique) Polyalkydes Polybutadiène Réduction des composés organiques volatils Rhéologie Stabilité au stockage Vernis Index. décimale : 667.9 Revêtements et enduits Résumé : Reducing the level of volatile organic compounds (VOCs) in solvent-based alkyd resin systems poses a huge challenge for formulators. A novel liquid hydrocarbon polymer minimises VOCs and offers improved application properties in clear coatings. A newly developed liquid polybutadiene polymer provides hope for more eco-friendly binder systems. Note de contenu : - Higher loading with novel resin - Application properties in clear coatings - Rheology - Drying time improved with high addition - Slight hardness increase at low addition - Greater substance penetration at high addition - Higher solids reduce VOCs - Ongoing research to explore benefits in different systems - FIGURES : 1. Storage stability of blends LPBD/alkyd resin 1 - 2. Rheology profile of modified alkyd blends - 3. Set-up for wood penetration - 4. 1.5 cm depth cross-section of oak panels after 15 minutes dip - 5. Chromatograms showing the difference in VOC content - TABLES : 1. Typical formulations example to assess drying time - 2. Drying time results - 3. Pencil hardness data En ligne : https://drive.google.com/file/d/1gGO-v9dKZJG56M_1URAUXBH_rT4XijM_/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29616 [article]

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