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]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
23537	-	Périodique	Bibliothèque principale	Documentaires	Disponible

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]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
23223	-	Périodique	Bibliothèque principale	Documentaires	Disponible

---

1 (1 - 2 / 2)