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The path to greater resistance / Abhishek Srivastava in EUROPEAN COATINGS JOURNAL (ECJ), N° 6 (06/2018)
[article]
Titre : The path to greater resistance : Effect of reactive diluents on UV-curable wood coating properties Type de document : texte imprimé Auteurs : Abhishek Srivastava, Auteur Année de publication : 2018 Article en page(s) : p. 26-32 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bois -- Revêtements
Brillance (optique)
Copolymère uréthane acrylate
Diluants
Essais dynamiques
Formulation (Génie chimique)
Mesure
Polyesters
Polymères -- Synthèse
Polyols
Polyuréthanes
Résistance à l'abrasion
Revêtements -- Propriétés chimiques
Revêtements -- Propriétés mécaniques
Revêtements -- Séchage sous rayonnement ultravioletIndex. décimale : 667.9 Revêtements et enduits Résumé : UV-curable polyurethane acrylate wood coatings were studied with the aim of enhancing protective and decorative properties. Adding reactive diluents may improve coating hardness, ease of application as well as resistance to abrasion and chemicals but it is a delicate balance. Incorporating too much of the diluents can cause micro-distortions on the surface, and brittleness - impairing gloss and scratch resistance. Note de contenu : - Experimental : Polyester polyol synthesis - Urethane acrylate synthesis - Polyurethane acrylate synthesis - Measurements - Preparation of coating samples - UV curing of samples - PU-acrylate resin analysis shows low molecular weight - Reactive diluents improve coating resistance - Scratch hardness
- Abrasion resistance
- Gloss at 60° angle
- Pencil hardness
- Cross hatch hardness
- Hydrocarbon chain in hdda results in better chemical resistance
- Excellent stain resistance
- Correct balance of reactive diluents enhances performance
- FIGURES : 1. Acid value of polyester polyol - 2. Hydroxyl value of a) polyester polyol and b) PU acrylate resin - 3. IR spectrum of the PU-acrylate resin - 4. Molecular weight of PU-acrylate resin
- TABLES : 1. Formulation of coating samples - 2. Viscosity and refractive index of coating samples - 3. IR spectrum of the PU-acrylate resin
En ligne : https://drive.google.com/file/d/1Bm5rZ9Ypm6YgAwLm2o53LpPBzIv1YWf9/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30721
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 6 (06/2018) . - p. 26-32[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20010 - Périodique Bibliothèque principale Documentaires Disponible The right dose for the right cure / Xavier Drujon in EUROPEAN COATINGS JOURNAL (ECJ), N° 5 (05/2020)
[article]
Titre : The right dose for the right cure : Effect of acrylate monomer and oligomer selection on the properties of cured coatings Type de document : texte imprimé Auteurs : Xavier Drujon, Auteur Année de publication : 2020 Article en page(s) : p. 18-23 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Copolymère uréthane acrylate
Monomères
Oligomères
Revêtements -- Propriétés chimiques
Revêtements anti-adhésifs -- Séchage sous rayonnement électronique
Revêtements anti-adhésion -- Séchage sous rayonnement ultraviolet
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : UV is by far the most common source of radiation-curing energy, and is widely used for coatings on heat-sensitive substrates. It has expanded significantly into a multiplicity of other applications, this expansion being driven by performance, economics and environmental considerations. However, EB technology can be more relevant in some high-speed and high-volume applications and can be expected to contribute substantially to the growth of radiation curing in the future. Note de contenu : - EB to boost growth of radiation curing
- Experimental : Raw materials - Equipment and method
- Reactivity
- Solvent resistance
- Higher voltage is better
- Hardness
- Double-bond conversion unexpectedly lower
- EB and UV curing of ethoxylated TMPTAS
- Hardness tails off under UV
- Fig. 1a : EB curing of UA3 (f=6) under an applied voltage of 80 kV and varying dose
- Fig. 1b : EB curing of UA2 (f=2) under and applied voltage of 80 kV and varying dose
- Fig. 2 : Hardness (Persoz) of various UAs as a function of diluting monomer and type of cure
- Fig. 3 : Hardness as a function of the wt% ethoxy in the monomer for 60/40 UA5/TMPX(EO)TA blends cured by EB and UV
- Table 1 : Acrylate-functional monomers
- Table 2 : Acrylate-functional urethane acrylate oligomers
- Table 3 : Cure of UA3 (f=6) with a dose of 30 kGy under different voltages
- Table 4 : DMA and FTIR analysis of UA4/HDDA films cured by UV and EB
En ligne : https://drive.google.com/file/d/1qZ0Hhncpnue3mOGsHUOs1fKZDf4bgjaS/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34172
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 5 (05/2020) . - p. 18-23[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21745 - Périodique Bibliothèque principale Documentaires Disponible Thoughts on waterborne industrial coatings / Clifford K. Schoff in COATINGS TECH, Vol. 14, N° 10 (10/2017)
[article]
Titre : Thoughts on waterborne industrial coatings Type de document : texte imprimé Auteurs : Clifford K. Schoff, Auteur Année de publication : 2017 Article en page(s) : p. 68 Langues : Américain (ame) Catégories : Revêtements -- Propriétés chimiques
Revêtements en phase aqueuse -- Additifs
Tension superficielleIndex. décimale : 667.9 Revêtements et enduits Résumé : A pre-publication read of Cynthia Challener’s excellent article in this issue on waterborne industrial coatings led me to reflect on my knowledge and experiences in this area. She notes that far fewer commercial waterborne than solventborne industrial products are being used in the United States. People who she interviewed point out many reasons for this, including cost, application difficulties, paint user inertia, and a general attitude that waterborne coatings are not as good as solventborne ones. It is ironic that when I entered the coatings industry almost exactly 43 years ago, I was told that waterborne coatings soon would replace solventbornes in all product areas—Industrial and Automotive as well Architectural. The last-named area certainly is heavily waterborne, and waterborne electrodeposition primers are universal in Automotive along with many waterborne basecoats and a few primer surfacers. However, Industrial has not yet joined the club. There are many paint and resin companies working to change that. En ligne : https://drive.google.com/file/d/1D3FDL0kOnT00b7CWv9fC0YbnflmQtNtx/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30630
in COATINGS TECH > Vol. 14, N° 10 (10/2017) . - p. 68[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19304 - Périodique Bibliothèque principale Documentaires Disponible 19331 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Topcoat for military aircraft Type de document : texte imprimé Auteurs : Christopher J. Lyons, Auteur Année de publication : 2017 Article en page(s) : p. 38-52 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion
Anticorrosifs
Anticorrosion
Avions -- Revêtements:Avions -- Peinture
Brillance (optique)
Colorimétrie
Composés organiques volatils
Dépôt par pulvérisation
Durée de vie en pot
Epaisseur -- Mesure
Essais (technologie)
Opacité (optique)
Polyuréthanes
Revêtements -- Finition:Peinture -- Finition
Revêtements -- Propriétés chimiques:Peinture -- Propriétés chimiques
Revêtements -- Propriétés thermiques:Peinture -- Propriétés thermiques
Revêtements en phase aqueuse -- Séchage:Peinture en phase aqueuse -- Séchage
Revêtements en phase aqueuse:Peinture en phase aqueuseIndex. décimale : 667.9 Revêtements et enduits Résumé : A waterborne two-pack polyurethane finish coating formulated for military aircraft provides extended durability performance suited for Australia’s harsh climate as well as substantial reductions in content of volatile organic compounds when compared with high-solids solvent-based aerospace coatings. A formulating practice using commercially available hydroxyl-functional polyurethane dispersions combined with hydrophilically modified polyisocyanate resins enables compositions to be made that are suitable for spray application, have drying properties useful for aircraft workers, and cure to form films with the specified resistance and flexibility properties. Note de contenu : - EXPERIMENTAL : Approaches to formulating - Spray application - Solvent-based benchmarks - Testing - Gloss and color measurements - Exterior weathering - Calculations VOC levels
- RESULTS : In-can properties - Accelerated storage stability - Mixing - Spray application - Potlife - Freeze-thaw stability - VOC data - Early dry properties - Surface dry condition - Tape resistance - Hard-dry condition - Cure - Opacity - Surface appearance - Color and gloss - Dry adhesion - Water resistance - Humidity resistance - Heat resistance - Reverse impact flexibility - Low-temperature flexibility - Mandrel bend - Fluid resistance - Cleanibility - Corrosion resistance : salt spray - Corrosion resistance : Filiform - Exterior durabilityEn ligne : https://drive.google.com/file/d/1f9QfmlQ-40MIe-GWCAxvN5hsqaTxWCEg/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28791
in COATINGS TECH > Vol. 14, N° 6 (06/2017) . - p. 38-52[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19050 - Périodique Bibliothèque principale Documentaires Disponible A tunable controlled-release urea fertilizer coated with a biodegradable polyurethane-nanoclay composite layer / Kannika Sitthisuwannakul in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 2 (03/2023)
[article]
Titre : A tunable controlled-release urea fertilizer coated with a biodegradable polyurethane-nanoclay composite layer Type de document : texte imprimé Auteurs : Kannika Sitthisuwannakul, Auteur ; Kanittha Kamonchaivanich, Auteur ; Thanakorn Wirunmongkol, Auteur ; Pennapa Muthitamongkol, Auteur ; Wiyong Kangwansupamonkon, Auteur Année de publication : 2023 Article en page(s) : p. 635-646 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Angle de contact
Argile
Biodégradation
Caractérisation
Coefficient de diffusionUn coefficient de diffusion est une grandeur caractéristique du phénomène de diffusion de la matière. Le coefficient de diffusion mesure le rapport entre le flux molaire dû à la diffusion moléculaire, et le gradient de concentration de l'espèce chimique considérée (ou, plus généralement, de la variable d'effort entraînant cette diffusion), comme formulé par la loi de Fick.
Engrais organiques
Nanoparticules
Polyuréthanes
Revêtements -- Propriétés chimiques
Revêtements -- Propriétés mécaniques
Revêtements -- Propriétés physiques
Revêtements organiques
Système de libération contrôlée (technologie)
UréeIndex. décimale : 667.9 Revêtements et enduits Résumé : To minimize a loss of urea to the environment and also control a release activity, a tunable and controlled-release urea fertilizer (TCRF) was created. Composite coating layers of the TCRF were synthesized using a composite of nanoclay (B27), and a linseed oil-modified polyurethane resin (BURNOCK® UL65). The concentration of B27 nanoclay was varied from 0, 3, 5 and 10 wt% and called TCRF, TCRF-3, TCRF-5 and TCRF-10, respectively. Firstly, nanocomposite free-standing films (NFs) with 0, 0.5, 1, 3, 5 and 10 wt% of B27 were synthesized and tested to demonstrate the mechanical properties of the coating layer. When the B27 clay content increased, the Young’s modulus and yield strength were increased. On the other hand, the elongation at break was decreased. NFs were also characterized by XRD and TEM, which showed a partial exfoliated nanocomposite character. The water contact angle measurement showed that all NFs had hydrophobicity properties (87°–90° contact angle). Moreover, the microorganism degradability test showed that the NFs degraded at 37 ± 2°C and 58 ± 2°C in manure, a common agriculture media. The study on coated urea fertilizers found that the thickness of all TCRFs layers is around 52–54 μm. The nitrogen release profiles of the TCRF at 60°C in water as a predictive analytic model were investigated using an elemental analyzer that is a pathway analysis method to understand the release profiles of the TCRFs. All release profiles fitted well with the sigmoidal model, which was suitable for a common plant growth. The profiles gave diffusion coefficients (D) in the range of 49–69 μm2 h−1 and presented an inverse trend to the yield strength of the NFs. The investigation demonstrated that B27 played an important role in tuning the strength of the coating layers that affected the urea release to the plants and the environment. Note de contenu : - MATERIALS AND METHODS : Chemicals - Nanocomposite free-standing films (NFS) preparation - Biodegradability analysis of the NF - Tunable controlled-release urea fertilizer (TCRF) preparation - Characterizations - Nitrogen release test and kinetic study of TCRF
- RESULTS AND DISCUSSION : Swelling performance and the characteristics of the nanoclays - Chemical and physical properties of the NF - Biodegradable ability - Nitrogen release mechanism
- Table 1 : Mechanical properties and contact angles of NF nanocomposite films
- Table 2 : The percentages of biodegradation via the conversion yield of carbon in the sample to carbon dioxide according to the ASTM 5338–98 test method
- Table 3 : Kinetic parameters and diffusion coefficients of various types of TCRFDOI : https://doi.org/10.1007/s11998-022-00688-w En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00688-w.pdf?pdf=button Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39308
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 635-646[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24056 - Périodique Bibliothèque principale Documentaires Disponible Utilitarian and good looking / Steven Reinstadtler in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 203, N° 4589 (10/2013)
PermalinkWater-thinnable coatings / Ganesh Datt Bajpai in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 198, N° 4524 (05/2008)
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