Faster finishing / Mark Gilbert in EUROPEAN COATINGS JOURNAL (ECJ), N° 10 (10/2014)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 10 (10/2014) . - p. 16-20 Titre : Faster finishing : Benefits of waterborne UV curable resins on flexible substrates Type de document : texte imprimé Auteurs : Mark Gilbert, Auteur ; Terri Carson, Auteur ; Laurie Morris, Auteur Année de publication : 2014 Article en page(s) : p. 16-20 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Finition Photoamorceurs (chimie) Polyuréthanes Vernis -- Séchage sous rayonnement ultraviolet Vernis en phase aqueuse Index. décimale : 667.9 Revêtements et enduits Résumé : The chemistry and curing requirements of waterborne UV PUD coatings are outlined. Isocyanate-cured waterborne PUDs are widely used as leather coatings. Two such coatings were modified by inclusion of UV-curable PUDs. The UV coatings showed very good performance, with the advantage that final properties are attained very rapidly after curing. Note de contenu : - Chemistry of UV curing outlined - UV PUDs have some unique advantages - Why photoinitiator selection is critical - Photoinitiator and pigment affect lamp selection - Formulation and application of experimental coatings - Good flexibility and blocking performance - Good resistance properties are achieved rapidly - UV PUDs offer a high-quality finishing system En ligne : https://drive.google.com/file/d/1-FevW0lIFKn3X6tmIsjbu5ef3Rz2aggG/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22065 [article]

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Inherent matte polyurethane dispersions as matting agent / Terri Carson in COATINGS TECH, Vol. 13, N° 2 (02/2016)  

[article]  inCOATINGS TECH > Vol. 13, N° 2 (02/2016) . - p. 38-44 Titre : Inherent matte polyurethane dispersions as matting agent Type de document : texte imprimé Auteurs : Terri Carson, Auteur ; Mario Schoondermark, Auteur ; Markus Dimmers, Auteur ; David Folkman, Auteur Année de publication : 2016 Article en page(s) : p. 38-44 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Agent mattant Bois -- Vernis Dispersions et suspensions Formulation (Génie chimique) Matières plastiques -- Revêtement Parquets -- Revêtements protecteurs Polymères aliphatiques Polyuréthanes Résistance chimique Surfaces -- Analyse Index. décimale : 667.9 Revêtements et enduits Résumé : The objective of this work is focused on the development of an inherent matte and hard polyurethane dispersion. Idally, such a polymer used in a low-gloss coating already has a matte polymer film without the use of any additional matting agents to avoid the above-mentioned drawbacks. Additional technical requirements have been defined : - Solvent-free, hard aliphatic PUD - Gloss levels of <5@20° /<20@60°/ /<50@85° - Excellent sanding properties by machine sanding - Resistance to chemicals and stains - High optical clarity over dark substrates - Scratch resistance - No hard sedimentation in coatings - Good compatibility with other resin binders - Low amine content (1%) - The manufacture of water-based polyurethane dispersions is well documented in literature and will not be discussed here. The scope of this work is to investigate this new development as a liquid matting agent in traditional wood floor finishes and as coatings for rigid plastics. Note de contenu : FIGURES : 1. Matting mechanism - 2. Confocal microscopy of the hard matte PUD - 3. Analysis of height and particle size of the hard, matte PUD - 4. 3D surface profile of the hard, matte PUD vs a PUD with 1.5% pyrogenic silica - 5. Gloss as a function of % matte PUD in aliphatic PUD 1 - 6. Efficiency of hard matt PUD vs. pyrogenic silica in an aliphatic PUD 1 - 7. Koenig hardness values - 8. Black heel mark resistance - 9. Floor coating performance - 10. Ultra-matte floor finish with matte PUD - 11. Confocal microscoy of a matte, soft-feel PUD - TABLES : 1. Semi-gloss wood flooring formulas - Ultra-matte floor finish properties En ligne : https://drive.google.com/file/d/1YNVWrhyWmKcXjj0vri0NNMVn7lt8lssQ/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25758 [article]

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Novel multi-phase acrylics / Ivan Tyre in COATINGS TECH, Vol. 9, N° 8 (08/2012)  

[article]  inCOATINGS TECH > Vol. 9, N° 8 (08/2012) . - p. 32-38 Titre : Novel multi-phase acrylics : For high performance coatings Type de document : texte imprimé Auteurs : Ivan Tyre, Auteur ; Terri Carson, Auteur Année de publication : 2012 Article en page(s) : p. 32-38 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion Anticorrosion Polyacryliques Polymères en émulsion Polymérisation Résistance au chocs Revêtements:Peinture Index. décimale : 667.9 Revêtements et enduits Résumé : For the past few decades, coatings chemists have been responsible for developing high performance coatings while complying with tightening environmental restrictions, particularly the reduction of volatile organic compound (VOC) content. With the initial restrictions in the early 1990s, a chemist could potentially pull out "extra" solvents such as propylene glycol which enhanced freeze/thaw, flow and leveling, and open time, and reduced the levels of coalescing aids used to lower the minimum film formation temperature (MFFT) of the coating based on very hard polymers with glass transition temperature (Tg) in the 40-60°C range. As restrictions became even tighter, a strategy employed (and, in some cases, a very effective one) was the blending of soft and hard single phase resins. Care had to be taken with this approach, as film formation with two distinct polymer particles of varied size and MFFT did not always impart desired properties. Clear, haze-free films were not guaranteed and block resistance properties were subject to the ration and size of the hard polymer to soft particle. With the advent of computer-controlled reaction vessels, the production of multi-phase particles that have both a soft segment for film formation at lower VOC, along with improved elasticity, and a harder portion for property enhancements such as block and dirt pick-up resistance, is possible. This article does not intend describes the fine details of manufacturing these resins, but presents a simplified schematic view along with a description of possible morphologies. Note de contenu : - Polymerization scheme and morphology - Formulating guidelines with multi-phase dispersions - Benchmarking studies of single phase versus multi-phase emulsions in coatings applications : Efflorescence resistance - Wood primer applications (direct-to-metal applications - block resistance - corrosion resistance - gloss retention - impact resistance/flexibility - Tape pull adhesion method B (crosshatch version) En ligne : https://drive.google.com/file/d/1Mdamlv30MGKEAh_b_l3uYb0hbKY8MtMk/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15753 [article]

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Waterborne resins for industrial wood coatings / Terri Carson in COATINGS TECH, Vol. 19, N° 5 (05-06/2022)  

[article]  inCOATINGS TECH > Vol. 19, N° 5 (05-06/2022) . - p. 60-66 Titre : Waterborne resins for industrial wood coatings Type de document : texte imprimé Auteurs : Terri Carson, Auteur ; Laurie Morris, Auteur ; Jim Bohannon, Auteur Année de publication : 2022 Article en page(s) : p. 60-66 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Ameublement Bois -- Revêtements protecteurs Bois extérieurs Dureté (matériaux) Eau bouillante Formulation (Génie chimique) Polyacryliques Polymères en émulsion Polyuréthanes Résistance à l'abrasion Résistance chimique Résistance thermique Revêtements en phase aqueuse Index. décimale : 667.9 Revêtements et enduits Résumé : Industrial wood coatings encompass several market areas, including furniture, kitchen cabinets, building products, and decorative coatings. Requirements for these markets largely depend on their field of application. Exterior performance is focused on high durability and protection against humidity, while interior coatings require properties such as scratch, chemical and abrasion resistance. One of the largest sectors of the interior market is the furniture industry. Several resin technologies are being used by coatings formulators in this market, including solventborne (SB), waterborne (WB) UV polyurethane dispersions (PUDs), and self-crosslinking acrylics. Several criteria are of importance in considering which technology to use. Each technology has advantages and disadvantages, and a comparison has been summarized based on the criteria in Figure 1. The dominant technology used in North America is solventborne, including nitrocellulose (NC) and acid cure conversion varnish. These coatings have many benefits, including fast dry time and very high gloss, and they enhance the wood appearance. They are also very economical and can be easily applied by spraying, rolling, curtain coat, and dipping. Note de contenu : - Fig. 1 : Resin technology comparison - Fig. 2 : Chemical resistance - Fig. 3 : Chemical of SC acrylics - Fig. 4 : Boiling water resistance - Fig. 5 : Scratch resistance comparison - Fig. 6 : Koenig hardness of UV PUDs - Fig. 7 : Koenig hardness of SC acrylics - Table 1 : Basic properties of water-based resins - Table 2 : Water-based UV formulation En ligne : https://drive.google.com/file/d/1894kmpA2ncTLNR8dDP6dJ0Y1KvCd9PNO/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37866 [article]

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