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Effects of different dicarboxylic acid on the UV-curable urethane resins made from palm fatty acid distillate / Kim Teck Teo in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 6 (11/2020)
[article]
Titre : Effects of different dicarboxylic acid on the UV-curable urethane resins made from palm fatty acid distillate Type de document : texte imprimé Auteurs : Kim Teck Teo, Auteur ; Aziz Hassan, Auteur ; Seng Neon Gan, Auteur Année de publication : 2020 Article en page(s) : p. 1571-1585 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Brillance (optique)
Caractérisation
Copolymère uréthane acrylique
Essai de dureté
Essais accélérés (technologie)
Essais de brouillard salin
Essais dynamiques
Métaux -- Revêtements protecteurs
Poids moléculaires
Résistance à la fissuration
Résistance au chocs
Résistance chimique
Revêtements -- Propriétés mécaniques
Revêtements -- Séchage sous rayonnement ultraviolet
Revêtements organiques
Transition vitreuse
Vernis -- Propriétés mécaniquesIndex. décimale : 667.9 Revêtements et enduits Résumé : A series of four polyol macromers with similar hydroxyl number was prepared by reacting palm fatty acid distillate with neopentaglycol, pentaerythritol, and separate equimolar amounts of isophthalic acid (IPA), terephthalic acid (TPA), phthalic anhydride (PA), and adipic acid (AA). Each macromer was then copolymerized with 2-hydroxylethyl acrylate (2-HEA) and toluene diisocyanate to produce the UV curable resins labeled as UA-IPA, UA-TPA, UA-PA, and UA-AA, respectively. The glass transition temperature (Tg), pendulum hardness, and adhesion properties of the cured films were studied. In general, all the resins produced coatings with high gloss and good adhesion. When accelerated weathering tests were carried out, films of UA-TPA could withstand UVA exposure up to 1500 h. When subjected to methyl ethyl ketone double rub test, cured films of UA-IPA and UA-TPA could withstand the highest double rubs at 90 times, followed by UA-PA and UA-AA at 45 and 15 times, respectively. Under salt spray corrosion test for 720 h, cured films showed good corrosion resistance with no observable blistering, except for UA-AA that showed slight blistering. Excellent water resistance was achieved by all cured films with good adhesion and minimal gloss reduction. Note de contenu : - EXPERIMENTS : Materials - Synthesis of hydroxyl terminated macromer - Urethane acrylate resins (UA) - Clearcoat formulation - Application of UA clearcoat on metal panel - FTIR analysis - Molecular weight measurement - Glass transition measurement - Pendulum hardness - Acid value and isocyanate value - Hydroxyl number - Adhesion performance - Pencil hardness - Gloss measurement - Flexibility of coating by T-bend test - Resistance of cracking by impact deformation - Cured film durability by QUV-A accelerated weathering test - Resistance of coating to MEK - Water resistance test - Monitoring of UV curing - UV-curable UA resin in metal coating application
- RESULTS AND DISCUSSION : Synthesis of macromer - Synthesis of UA-IPA, UA-TPA, UA-PA and UA-AA - UV Curing of resins - Change in Tg during UV curing - Pendulum hardness analysis of cured film - Physical and mechanical performance of UV cured film in metal coating - Film flexibility by T-bend test - Cracking resistance of the UV cured film by impact deformation - Solvent resistance of the UV cured film - Durability of UV cured film - Performance of water resistance of the UV cured filmDOI : https://doi.org/10.1007/s11998-020-00379-4 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00379-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34961
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Code-barres Cote Support Localisation Section Disponibilité 22458 - Périodique Bibliothèque principale Documentaires Disponible Eliminating PTFE from packaging coatings / Gehan Eltanany in EUROPEAN COATINGS JOURNAL (ECJ), (10/2023)
[article]
Titre : Eliminating PTFE from packaging coatings : Regulatory-compliant can coatings achieve comparable mechanical properties Type de document : texte imprimé Auteurs : Gehan Eltanany, Auteur ; Dave Seline, Auteur ; Ralf Eberhards, Auteur Année de publication : 2023 Article en page(s) : p. 24-29 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Aliments -- Emballages -- Aspect sanitaire
Brillance (optique)
Can coating
Cires
Dispersions et suspensions
Polymères -- Suppression ou remplacement
Polytétrafluoréthylène
Produits chimiques -- Suppression ou remplacement
Résistance à l'abrasion
Revêtements -- Additifs
Revêtements -- Propriétés mécaniquesIndex. décimale : 667.9 Revêtements et enduits Résumé : In response to increasing regulatory pressure restricting the use of PFAS, coating manufacturers are seeking PTFE-free products. Newly developed additives for waxes and dispersions demonstrate good potential for use in high-performance can coatings. This article presents a pathway to producing coatings with desirable properties but without problematic substances. Note de contenu : - Additives developed in response to legislative restrictions
- Experimental
- Testing mechanical and aesthetic properties
- Comparable friction to PTFE-based wax
- Significantly improved scratch resistance
- Abrasion resistance evaluation
- Higher gloss for new dispersion
- Potential PTFE alternative that enables faster processing
- Table 1 : Identity and physical properties of the wax additivesEn ligne : https://drive.google.com/file/d/1EhG49RUljIS_6AVLh-CdFYiwffXTj0hi/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40016
in EUROPEAN COATINGS JOURNAL (ECJ) > (10/2023) . - p. 24-29[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24267 - Périodique Bibliothèque principale Documentaires Disponible Enhancing the UV durability of epoxy coatings / Hank Bernacki in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 35, N° 3 (03/2018)
[article]
Titre : Enhancing the UV durability of epoxy coatings : Waterborne acrylic-epoxy hybrid coatings for steel Type de document : texte imprimé Auteurs : Hank Bernacki, Auteur ; Zhenwen Fu, Auteur ; Bingquan Li, Auteur ; Denise Lindenmuth, Auteur ; Leo J. Procopio, Auteur Année de publication : 2018 Article en page(s) : p. 44-54 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Brillance (optique)
Epoxydes
Latex
Métaux -- Revêtements protecteurs
Métaux -- Revêtements:Métaux -- Peinture
Polyacryliques
Polymères -- Synthèse
Revêtements bi-composant:Peinture bi-composant
Revêtements en phase aqueuse:Peinture en phase aqueuseIndex. décimale : 667.9 Revêtements et enduits Résumé : Epoxy chemistry is prevalent throughout coatings science and is utilized heavily for industrial maintenance coatings for steel and concrete. Epoxy coatings have many excellent properties, such as adhesion, corrosion resistance and hardness. However, bath solventborne epoxies and lower-VOC waterborne analogs have deficiencies such as brittleness, short potlives and must notably, pour durability towards UV light. Due to their pour weathering characteristics, epoxies tend tu chalk, yellow and lose gloss quickly when exposed to sunlight. A hybrid technology has been described that maintains the best qualities of epoxy chemistry, while im¬proving upon some of its weaknesses such as flexibility and UV durability. The hybrid technology joins acrylic and epoxy chemistries into a single waterborne offering that can then be formulated into 2K waterborne coatings for steel and concrete. The AEH represents a new method for supplying epoxy resin into a mixed 2K coating. The epoxy resin is hosted in acrylic latex particles and becomes available for cross-linking with a hardener after water begins to leave the film and particle coalescence starts. The AEH system is versatile in that either acid-functional acrylic or amine hardeners can be used. The result is a coating technology with a unique balance of properties, including long potlife, excellent corrosion resistance, good flexibility, and excellent UV durability and weatherability. Note de contenu : - Acrylic-epoxy hybrid technology
- Comparison of AEH technology with solventborne epoxies
- Table : Comparison of gloss white DTM finishes
- Fig. 1. The formation of DGEBA from bisphenol A and epichlorohydrin
- Fig. 2. The advancement of DGEBA into higher molecular weight Bis A epoxy resins
- Fig. 3. Types of waterborne epoxy coatings
- Fig. 4. Synthetic process for preparation of an acrylic-epoxy hybrid (AEH) polymer
- Fig. 5. Detailed view of epoxy transporting into the acrylic latex particle to form the AEH polymer
- Fig. 6. Possible 2K waterborne coatings based on AEH polymers
- Fig. 7. Salt spray panels after 1000 hours of exposure to ASTM B117
- Fig. 8. Gloss retention on accelerated UV-1 exposure of 2K gloss white DTM coatings
- Fig. 9. Gloss retention of 2K gloss white DTM coatings comparing AEH/acrylic, AEH/amine and SB epoxy/amine systemsEn ligne : http://www.paintsquare.com/jpcldigital/201803/index.html?page=46 Format de la ressource électronique : Html Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30377
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Code-barres Cote Support Localisation Section Disponibilité 19768 - Périodique Bibliothèque principale Documentaires Disponible Estimating service lifetimes in weathering : an optimistic view / Stuart G. Croll in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 3 (09/2007)
[article]
Titre : Estimating service lifetimes in weathering : an optimistic view Type de document : texte imprimé Auteurs : Stuart G. Croll, Auteur ; Brian R. Hinderliter, Auteur Année de publication : 2007 Article en page(s) : p. 217-230 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion
Brillance (optique)
Corrosion par érosion
Durée de vie (Ingénierie)
Revêtements -- Effets du climat:Peinture -- Effets du climat
Rupture (mécanique)
StatistiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : Directly correlating lifetime to coating composition by using standardized, artificial exposures, or even natural exposure, is often very difficult. However, significant progress can be made by breaking down the problem into smaller questions, which can be separately addressed. If one understands the physical parameters that affect end-use properties, then one can also group, and thus correlate, properties according to whether they depend on processes at the surface or in the bulk of a coating, or whether they depend on defects. A scheme is presented that shows how one can use knowledge from analytical physical or chemical materials science in a statistical model related to the “chemical paradigm.” Simple physical models that use this information, about the initial state of the coating and its rate of degradation, can be used to compare the performance of coatings and estimate, simply, service lifetime depending on the property of interest, in the environment of interest. One can see that different properties are sensitive in different ways to the degradation process and decay with a different rate. Thus, although properties may be determined by the same degradation process, and location within a coating, they do not correlate directly. These approaches show how to organize our knowledge of degradation processes, and environments, and be able to make some testable predictions on how coating properties deteriorate. DOI : 10.1007/s11998-007-9024-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-007-9024-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3638
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Code-barres Cote Support Localisation Section Disponibilité 008270 - Périodique Bibliothèque principale Documentaires Disponible Evaluation of non-stick fluorinated coatings / Jabir Ismaeili in EUROPEAN COATINGS JOURNAL (ECJ), (12/2023)
[article]
Titre : Evaluation of non-stick fluorinated coatings : A careful balancing act to optimise release performance and abrasion resistance Type de document : texte imprimé Auteurs : Jabir Ismaeili, Auteur ; Bikem Övez, Auteur Année de publication : 2023 Article en page(s) : p. 30-36 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Brillance (optique)
Plan d'expérience
Polytétrafluoréthylène
Résistance à l'abrasion
Réticulants
Revêtements -- Additifs
Revêtements anti-adhésion
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Fully fluorinated coatings, particularly those using polytetrafluoroethylene (PTFE), are favoured in cookware applications for their release properties. Although the low abrasion resistance of these coatings improves when using hardening additives, hardeners negatively impact release. An experimental design was performed to investigate the impact of two different hardening additives and deliver the most desirable results. Note de contenu : - Potential for tailored improvements in non-stick coatings
- Experimental
- Impact on surface characteristics
- Particle size and hardening additive have greatest impact on gloss
- Roughness is not an independent variable
- Further optimisation for release and abrasion resistance needed
- Table 1 : Experimental design
- Table 2 : Effect of each factor on sample weight lossEn ligne : https://drive.google.com/file/d/1s2PvyXksBKXhGSfBTYNdYHLibgw3Z-bf/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40275
in EUROPEAN COATINGS JOURNAL (ECJ) > (12/2023) . - p. 30-36[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24365 - Périodique Bibliothèque principale Documentaires Disponible Evaluation of the ASTM D7869-13 test method to predict the gloss and color retention of premium architectural finishes-I / Kurt Wood in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 5 (09/2018)
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