High solids acrylic and polyester polyols made easy / Carl Cavallin in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 206, N° 4616 (01/2016)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 206, N° 4616 (01/2016) . - p. 61-64 Titre : High solids acrylic and polyester polyols made easy Type de document : texte imprimé Auteurs : Carl Cavallin, Auteur ; Zegui Yan, Auteur ; David Vanaken, Auteur ; Denis Heymans, Auteur Année de publication : 2016 Article en page(s) : p. 61-64 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Haut extrait sec Néodécanoate de glycidyle Polyacryliques Polyesters Polyols Revêtements protecteurs Rhéologie Vernis Viscosité Index. décimale : 667.9 Revêtements et enduits Résumé : The authors, describe simple ways to produce low viscosity, high solids acrylic and polyester polyols based on glycidyl neodecanoate. Note de contenu : - Acrylic polyol resins - Polyester polyol resins - Acrylic polyol/star polyester polyol blends - Acrylic polyol and polyester polyol-hybrids - Clearcoat performance En ligne : https://drive.google.com/file/d/1-u2rFer8MQvlB1lsKN9a2aEKMtxA5zvd/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25307 [article]

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Inventive routes for the preparation of waterborne acrylic polyols for 2K PU protective topcoats / David Vanaken in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 212, N° 4676 (08/2022)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 212, N° 4676 (08/2022) . - p. 19-22 Titre : Inventive routes for the preparation of waterborne acrylic polyols for 2K PU protective topcoats Type de document : texte imprimé Auteurs : David Vanaken, Auteur ; Denis Heymans, Auteur ; Félix Feng, Auteur ; Nathalie Havaux, Auteur Année de publication : 2022 Article en page(s) : p. 19-22 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dispersions et suspensions Néodécanoate de glycidyle Polyacryliques Polyols Polyuréthanes Revêtements -- Finition Revêtements bi-composant Revêtements en phase aqueuse Revêtements organiques Revêtements protecteurs Index. décimale : 667.9 Revêtements et enduits Résumé : The authors summarises all of the recent data published on producing waterborne acrylic polyols for 2K PU topcoats. New regulations, increased awareness and the importance of environmental stewardship lead to a strongly increased demand for waterborne (WB) protective topcoats. However, matching the performance of solventborne (SB) two-component (2K) polyurethanes remains a challenge for resin and paint producers. Synthesis and formulation of primary or secondary dispersions are not straightforward. For secondary dispersions, the removal of solvents from polyols prior to dispersion in water is technically challenging. The emulsion polymerisation process producing primary dispersions often poses problems of water-phase homopolymerisation of the hydroxyl monomers resulting in poor stability of the emulsions, high process grit and insufficient crosslinking of the final coatings. Waterborne acrylic polyols (APO) for 2K urethane finishes have played an important role in enabling regulatory compliance in the industrial market, yet their synthesis can be difficult. This paper introduces two methods to produce high-performance solvent-free waterborne acrylic polyols using either glycidyl neodecanoate or its acrylated adduct. The performance characteristics of coatings made with these waterborne polyols are also demonstrated. Note de contenu : - Waterborne technologies - Waterborne APO secondary dispersions - Performance of waterborne acrylic polyols based on glycidyl neodecanoate - Waterborne APO secondary dispersions conclusion - Waterborne hydroxy-functional emulsions - Primary vs. secondary dispersions - Novel OH-functional emulsions for high-performance WB 2K PU coatings - Waterborne hydroxy-functional emulsion conclusions En ligne : https://drive.google.com/file/d/1Koo1HDSSIlt1dDIXxIGDfBT_lXVQJr7D/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37868 [article]

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Necessity is the mother of invention / David Vanaken in EUROPEAN COATINGS JOURNAL (ECJ), N° 2 (02/2022)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 2 (02/2022) . - p. 28-33 Titre : Necessity is the mother of invention Type de document : texte imprimé Auteurs : David Vanaken, Auteur ; Denis Heymans, Auteur ; Félix Feng, Auteur ; Nathalie Havaux, Auteur Année de publication : 2022 Article en page(s) : p. 28-33 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Néodécanoate de glycidyle Polyacryliques Polymères en émulsion Polyols Index. décimale : 667.9 Revêtements et enduits Résumé : Resin and paint producers are under increasing pressure to find environmentally friendly alternatives to conventional solvent-borne polyurethane for protective topcoats. We have developed easy process to produce high-performance solvent-free water-borne acrylic polyols via primary or secondary dispersion using glycidyl neodecanoate or its acrylated adduct. Note de contenu : - Versatile monomers may resolve synthesis issues - Water-borne apo secondary dispersions - Glycidyl neodecanoate reactive solvent reduces VOC - Performance of water-borne acrylic polyols based on glycidyl neodecanoate - Adjustable polyol composition and properties - Water-borne OH-functional emulsions for different applications - Enhanced crosslinking improves cured film properties - Process and performance benefits - Fig. 1 : Glycidyl neodecanoate structure - Fig. 2 : Glycidyl neodecanoate as a reactive solvent in the initial reactor charge - Fig. 3 : Preparation of glycidyl ester-based acrylic polyol, glycidyl ester incorporation in polymer backbone - Fig. 4 : : Comparison of a solvent-free acrylic polyol dispersion based on glycidyl neodecanoate and a conventional polyol dispersion containing solvent - Fig. 5 : Acrylated glycidyl neodecanoate - Fig. 6 : Comparison of synthesis and structure of WB APO secondary dispersions and WB APO emulsions - Fig. 7 : Reduced grit formation with ADN - Fig. 8 : Comparison of cured film properties with and without AGN as comonomer (emulsion with il % OH on solids) En ligne : https://drive.google.com/file/d/10d7fG_wqohnasK_gzeAbi9p_XFHV9fUQ/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37005 [article]

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Novel path to hydroxyl-functional emulsions for high-performance waterborne two-component polyurethane coatings / Steven Mao in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 211, N° 4670 (08/2021)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 211, N° 4670 (08/2021) . - p. 41-44 Titre : Novel path to hydroxyl-functional emulsions for high-performance waterborne two-component polyurethane coatings Type de document : texte imprimé Auteurs : Steven Mao, Auteur ; David Vanaken, Auteur ; Wang Scott, Auteur ; Marcelo Herszenhaut, Auteur Année de publication : 2021 Article en page(s) : p. 41-44 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Groupe hydroxyle Matériaux hautes performances Polyuréthanes Revêtements bi-composant Revêtements en phase aqueuse Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : The global demand for waterborne (WB) industrial coatings continues to increase to meet more and more stringent VOC legislation and heightened awareness of environmental stewardship. Because of their lower environmental footprint, waterborne epoxy resins, acrylic polyol (APO) dispersions, and hydroxyl-functional (OH-functional) emulsions are gaining market share in high-performance two-component (2K) industrial coating applications. While waterborne epoxy resins are cured with a variety of amines, APOs and OH-functional emulsions are crosslinked with diverse WB isocyanates. Compared to APO dispersions, OH-functional acrylic emulsions offer lower cost and an easier production route, in addition to faster drying and property development. OH-functional acrylic emulsions can be designed with a wide range of hydroxyl values and performance characteristics to address the needs of many different applications in plastic, wood, automotive, and construction coatings. Note de contenu : -NEES AND TRENDS IN THE COATINGS INDUSTRY : Sustainability & lower VOC requirements, which lead to - Excellent performance - Globalisation of technologies - Controlled costs - TAKING ADVATAGE OF A HIGHLY VERSATILE FAMILY OF BUILDING BLOCKS - BUILDING WB 2K PU SYSTEMS - PRIMARY VS. SECONDARY DISPERSION : Process - Chemistry - NOVEL OH-FUNCTIONAL EMULSIONS FOR HIGH-PERFORMANCE WB 2K PU COATINGS - Fig. 1 : Koch reaction to produce neo-acids - Fig. 2 : Structure of CE1OP glycidyl ester and its adduct with acrylic acid - Fig. 3 : - Fig. 4 : Relative ranges of acid values for various WB APO technologies - Fig. 5 : Synthesis of conventional WB APOs - Fig. 6 : APO dispersions and APO emulsions - differences in synthesis and structure - Fig. 7 : Increased monomer pre¬emulsion stability with ACE - Fig. 8 : Reduced grit formation with ACE pre-emulsion stability with ACE - Fig. 9 : Improved crosslink density and functional group distribution when ACE is used - Fig. 10 : Comparison of cured film properties with and without ACE as comonomer (emulsion with 4% OH content) En ligne : https://drive.google.com/file/d/112kRfe-YrZXWW57T0ioxjKN1LuT6zKEk/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36134 [article]

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