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Natural weathering performance and the effect of light stabilizers in water-based coating formulations on resin-modified and dye-stained beech-wood / Bodo Caspar Kielmann in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 6 (11/2016)
[article]
Titre : Natural weathering performance and the effect of light stabilizers in water-based coating formulations on resin-modified and dye-stained beech-wood Type de document : texte imprimé Auteurs : Bodo Caspar Kielmann, Auteur ; Carsten Mai, Auteur Année de publication : 2016 Article en page(s) : p. 1065-1074 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Bois -- Revêtements protecteurs
Couleurs -- Stabilité
Essais accélérés (technologie)
Evaluation
Phénoplastes
Revêtements -- Effets du climat
Revêtements -- Effets du rayonnement ultraviolet
Revêtements en phase aqueuse -- Additifs
Stabilisants (chimie)
Surfaces -- AnalyseIndex. décimale : 667.9 Revêtements et enduits Résumé : This study assesses the performance of untreated and resin-modified beech-wood (Fagus sylvatica L.) during outdoor weathering. Boards modified with thermosetting N-methylol melamine (NMM) and phenol–formaldehyde (PF) resins, which were partly dye stained, were coated solely with a waterborne acrylic binder and formulations containing the same binder with different types and contents of photo-protective additives. Most modifications of the wood substrate changed the original color of wood, except for sole NMM modification. Changes in mass and capillary water uptake during exposure of modified, uncoated and coated boards were less than those of respective controls. Surface defects and cracks were clearly fewer on modified wood than on the controls, but no clear difference was observed among the topcoats containing UV-protective agents (UV-PA). The color stability during outside weathering depended on the treatment and coating formulation. Untreated and NMM-modified boards became grayer, and the NMM-dye-modified boards turned to a lighter gray, while PF-modified boards adopted a darker, blackish color. The weathered coating on the modified boards, particularly with PF resin, showed less blistering, flaking, and cracking than that on the controls. UV-PA stabilized the color and adhesion on all boards compared to the sole binder formulation. We conclude that wood modification with NMM and PF resin improves the natural weathering performance of wood coated with acrylic coatings. Combination of modification with staining enables diversification of the optical appearance. Note de contenu : - MATERIALS AND METHODS : Wood specimens and chemicals - Modification of wood - Coating application - Natural weathering - Surface evaluation - Optical appearance
- RESULTS AND DISCUSSION : Weight percent gain and solution uptake - Coatability of wood - Natural weatheringDOI : 10.1007/s11998-016-9818-0 En ligne : http://link.springer.com/content/pdf/10.1007%2Fs11998-016-9818-0.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27262
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 6 (11/2016) . - p. 1065-1074[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18514 - Périodique Bibliothèque principale Documentaires Disponible Neutralising formulation problems / Silvia Ziebold in EUROPEAN COATINGS JOURNAL (ECJ), N° 3 (03/2017)
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Titre : Neutralising formulation problems : Novel sugar-based additive for ecolabel-certified paints Type de document : texte imprimé Auteurs : Silvia Ziebold, Auteur ; Jörg Rüger, Auteur Année de publication : 2017 Article en page(s) : p. 104-109 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Etiquetage écologique
Glucides
Neutralisants (chimie)
pH
Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- Additifs
Stabilité au stockageIndex. décimale : 667.9 Revêtements et enduits Résumé : Despite only being used in small quantities in water-based paints, neutralising agents can have a significant impact. They regulate the pH value and make a positive contribution to the storage stability of the paint by reducing the interaction between the paint ingredients. Compliance with health and environmental requirements, such as being VOC/SVOC-free and hazard label-free, make these neutralising agents particularly attractive for ecolabel-certified paints. Note de contenu : - Multifunctional neutralising agents improve paint performance
- Ecolabels restrict content
- Sugar-based additive offers sustainability benefits being a renewable material
- Neutralising agents put to the test
- Improving storage stability in semi-gloss lacquers
- No impact on drying process
- Flash rust
- Shift of shades in tinted systems
- Pigment compatibility
- Novel additive improves paint performance and is economicalEn ligne : https://drive.google.com/file/d/1u-nkqyx6yQqioGURRY_ZRVE2ptNEln3l/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27955
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 3 (03/2017) . - p. 104-109[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18717 - Périodique Bibliothèque principale Documentaires Disponible New additive to eliminate pinholes for water-based coating formulations / Jim Reader in COATINGS TECH, Vol. 18, N° 3 (03/2021)
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Titre : New additive to eliminate pinholes for water-based coating formulations Type de document : texte imprimé Auteurs : Jim Reader, Auteur ; Jos van Oosterwijk, Auteur ; Caixuan Xu, Auteur ; Ye Dai, Auteur ; Ruediger Mertsch, Auteur ; Shauna McAuliffe, Auteur ; Jianchang Tang, Auteur Année de publication : 2021 Article en page(s) : p. 30-37 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antimousse
Automobiles -- Revêtements
Couche de base
Dépôt par pulvérisation
Encre
Formulation (Génie chimique)
Piqures (défaut)
Revêtements -- Défauts
Revêtements en phase aqueuse -- Additifs
Revêtements organiques
Surfactants
Tension superficielle
Vernis bi-composant
ViscositéIndex. décimale : 667.9 Revêtements et enduits Résumé : Pinholes are a problem for formulators developing fast-drying, water-based coatings, especially in coatings cured at high temperature and applied at high wet film thickness. Pinholes are often caused by air or solvent vapor release from the film when the coating is too viscous to flow back and repair the holes. Pinholes also occur in baked coatings, as the trapped vapor regains mobility when the coating softens under heating, before crosslinking hardens the film, preventing flow back into the voids.
Hydrocarbon-based defoamers help eliminate the foam and pinholes in these formulations, but their limited compatibility results in lower gloss, poor leveling and surface appearance. This paper describes a new additive that combines both deaeration of microfoam and modified surface drying for pinhole elimination. This new additive shows comparable pinhole elimination compared with hydrocarbon-based defoamers, but without compromising formulation compatibility or final coating appearance.Note de contenu : - New additive development
- Fig. 1 : Pinholes in a spray applied automotive OEM basecoat
- Fig. 2 : bubble release and pinhole formation in an applied film
- Fig. 3 : Molecular defoamer mechanism to eliminate microfoam
- Fig. 4 : Change in film fluidity of a water-based coating during drying
- Fig. 5 : Influence of surfactants on open time of water-based, 2K clearcoat new anti-pinhole additive
- Fig. 6 : a) Surface tension reduction with LA-W 1814 and b) Foam control in water-based primer
- Fig. 7 : The "wedge" application test
- Fig. 8 : Minimum film thickness for pinhole formation
- Fig. 9 : Foam control and surface appearance of white basecoat sprayed with different anti-pinhole additives
- Fig. 10 Panels of white basecoat containing different anti-pinhole additives
- Fig. 11 : Foam and surface appearance of silver basecoat panels after clearcoat
Application
- Fig. 12 : a) Flop index and b) wave scan of silver basecoat panels after clearcoat application
- Fig. 13 : Images of water-based plastic coating applied onto glass after high-speed stirring. (Panels are viewed from back of panel with backlighting)
- Fig. 14 : Foam control in water-based packaging ink
- Fig. 14 :
- Table 1 : White basecoat formulation
- Table 2 : Blue packaging ink formulationEn ligne : https://drive.google.com/file/d/11XvghQD3eob_XhUd0fbNTfayVNfj_h-N/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35527
in COATINGS TECH > Vol. 18, N° 3 (03/2021) . - p. 30-37[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22653 - Périodique Bibliothèque principale Documentaires Disponible 22652 - Périodique Bibliothèque principale Documentaires Disponible New, highly efficient associative thickeners in modern coating formulation / Carlos Feito in SURFACE COATINGS INTERNATIONAL, Vol. 104.1 (01-02/2021)
[article]
Titre : New, highly efficient associative thickeners in modern coating formulation Type de document : texte imprimé Auteurs : Carlos Feito, Auteur ; Udo Schonhoff, Auteur ; Frank Abschlag, Auteur Année de publication : 2021 Article en page(s) : p. 30-35 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acétate de vinyle L'acétate de vinyle est l'ester de l'acide acétique (acide éthanoïque) avec le tautomère alcoolique de l'éthanal (acétaldéhyde) et de formule semi-développée, CH3COO–CH=CH2.
L'acétate de vinyle est préparé, en règle générale, en phase vapeur, en faisant réagir un grand excès d'acétylène sur de l'acide acétique (200 °C) en présence de catalyseurs au zinc et au cadmium). On obtient un liquide incolore à odeur très pénétrante qui ne se polymérise en polyacétate de vinyle (PVAC) qu'en présence de catalyseurs et donne des solides durs très stables à la chaleur. Il peut être copolymérisé avec d'autres composés vinyliques ou d'autres monomères.
Bois -- Revêtements protecteurs
Copolymère éthylène acétate de vinyle
Copolymère styrène acrylique
Epaississants
Formulation (Génie chimique)
Polyacryliques
Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- Additifs
RhéologieIndex. décimale : 667.9 Revêtements et enduits Résumé : Numerous kinds of associatively acting thickeners are available on the market, all of which influence viscosity in different ways. The choice of a suitable product is governed by the respective performance requirements. In addition, an important role is also played by the increasingly stringent environmental regulations and the costs to be expected. Doing justice to these demands, e.g. for ecolabels, Germany's'Blauer Engel', etc., requires appropriate adaptation of the formulations and thus also of the corresponding raw materials. Note de contenu : - Part 1 : Efficiency assessment in different binder systems
- Part 2 : Complexity reduction
- Part 3 : Influence of RHEOLATE HX 6008 on the properties of the finished paint system
- Fig. 1 : Overview of thickener classes
- Fig. 2 : Network structure in a NiSAT-thickened paint
- Fig. 3 : Efficiency og RHEOLATE HX 6808 and 6050 in pure acrylic paint (PVC 30)
- Fig. 4 : Efficiency of RHEOLATE HX 6008 and 6050 in styrene-acrylic paint (PVC 50)
- Fig. 5 : Efficiency of RHEOLATE HX 6008 and 6050 in an emulsion paint based on vinyl acetate-VeoVA (PVC 50)
- Fig. 6 : Efficiency of RHEOLATE HX 6008 and 6050 in an emulsion paint based on vinyl acetate-ethylene (PVC 50)
- Fig. 7 and 8 : Flow characteristics of RHEOLATE HX 6008 and 6050 in comparison with reference thickener combinations
- Fig. 9 : Flow characteristics of RHEOLATE HX 6008 in an acrylic wood coating
- Table 1 : Concentration of the additive combinations
- Table 2 : Application result - RHEOLATE HX 6008 in a pure acrylic paint, PVC 30
- Table 3 : Application results - RHEOLATE HX 6050 in a VAE-based paint, PVC 50
- Table 4 : RHEOLATE HX 6008 in an acrylic wood coating - Application properties
- Table 5 : Binder assignment
- Table 6 : Formulations, PVC 30 and 50
- Table 7 : Formulation, acrylic wood coatingEn ligne : https://drive.google.com/file/d/1GZf4l6K0ceh4h_KcG6nNucABQl89mTiv/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35996
in SURFACE COATINGS INTERNATIONAL > Vol. 104.1 (01-02/2021) . - p. 30-35[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22824 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : New standard for wood coatings : 2K water-borne polyurethane systems without sacrificing drying time Type de document : texte imprimé Année de publication : 2019 Article en page(s) : p. 20-25 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bois -- Revêtements protecteurs
Polyisocyanates hydrophiles
Polyuréthanes
Réticulants
Revêtements bi-composant
Revêtements en phase aqueuse -- Additifs
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Around 40% of the global industrial wood coatings market is based on traditional solvent-borne polyurethane technology. Water-borne polyurethane systems are high performance and en-vironmentally compatible but their in-herently slower drying has limited the market shift towards this low emission alternative. A novel hybrid hydrophilic polyisocyanate offers a fast-drying and promising solution. Note de contenu : - Hardener is key to developing fast crosslinkers
- Novel HDI-TDI hardener for faster curing of 2K WB systems
- Anionic hydrophilisation proves effective
- Aromatic content
- Faster cure with minimal compromise
- Drying time comparable to 2K SB standard
- More environmentally friendly solutions now possible
- Fig. 1 : Gloss and haze of two different 2K WB systems based on standard hydrophilic polyisocyanate or the novel H01/1-131 based one
- Fig. 2 : Drying lime comparison at room temperature [23°C, 50 % RH) of different 2K WB coatings (based on secondary and pri¬mary acrylic polyol and two different hardeners) according to OIN 53150, 120 g/m2 on glass. Total dry [TLI] of 2K WB systems can be reduced by half compared to a standard system when using the novel hardener
- Fig. 3 : Hardness evolution of coatings based on different polyols combined with bath hardeners. New development shows faster hardness evolution Chan homologue HDI type
- Fig. 4 : Drying and hardness evolution of coatings based on OH-functional PUD and different hardeners. The novel PIC shows (aster hardness evolution Chan homologue HDI type
- Fig. 5 : Comparison of yellowing under natural light [under glass 45-e oriented south] from coatings based on new hardener and standard types [aliphatic and aromatic]
- Table 1 : Technical data of novel aliphatic-aromatic hydrophilic polyisocyanate
- Table 2 : Effect of increasing aromatic content [from left to right] in hydrophilic polyisocyanates on 2K WB coating based on second¬ary acrylic polyol and different hardeners
- Table 3 : Comparison of different coahing properhies based on novel hardener vs. standard 2K 5B formulationEn ligne : https://drive.google.com/file/d/1-V4_TKhiqBCxfpPzw777iAw0337-4o6N/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32905
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 9 (09/2019) . - p. 20-25[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21176 - Périodique Bibliothèque principale Documentaires Disponible New urethane diol resin modifiers for improved performance of aminoplast crosslinked coatings / Matthew Gadman in COATINGS TECH, Vol. 16, N° 2 (02/2019)
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