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Unique additives for high-performance industrial protective coatings / Yong Zhang in COATINGS TECH, Vol. 20, N° 3 (05-06/2023)
[article]
Titre : Unique additives for high-performance industrial protective coatings Type de document : texte imprimé Auteurs : Yong Zhang, Auteur ; Bridgette Hendrix, Auteur Année de publication : 2023 Article en page(s) : p. 56-62 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Epoxydes
Essais de résilience
Essais dynamiques
Polyphénoxy
Réticulants
Revêtements -- Propriétés physiques
Revêtements bi-composant
Revêtements en phase aqueuse -- Additifs
Revêtements organiques
Revêtements protecteurs
ZincIndex. décimale : 667.9 Revêtements et enduits Résumé : Two-component (2K) epoxy coatings have long been used for industrial protective applications due to their excellent adhesion to a wide range of substrates, superior chemical resistance, and good mechanical properties.1 Today, those in the industry who are looking for innovations that can boost coating performance heavily prioritize high performance and productivity in particular.
Their main goal is to extend coating life service time and use the fewest coating layers possible. Additives, or performance boosters, are commonly used for this purpose in a formulation. One example of an additive is tougheners, which are used in many high-performance industrial protective coatings to improve their toughness, flexibility, adhesion, and long-term performance.
Phenoxy resins are unique polymerbased additives that have become available to formulators. Phenoxy resins are the product of bisphenol A and epichlorohydrin, with the epoxide ring opened. They are a tough and ductile thermoplastic material with high cohesive strength and good impact resistance. The backbone ether linkages and pendant hydroxyl groups promote wetting and bonding to polar substrates and fillers. The typical phenoxy resin structure is shown in Figure 1.
The structure of the phenoxy resin is a polyhydroxyether with terminal alphaglycol groups. Weight-average molecular weights range from approximately 25,000 to above 60,000, with n ranging from 30 to above 60. This long chain linear polyhydroxylether structure allows for excellent adhesion, impact and abrasion resistance, flexibility, and chemical resistance in coating applications.
Phenoxy resins are soluble in a variety of materials, including ketones, glycol ethers, and glycol ether esters. This article discusses the use of a phenoxy solvent solution, in a solventborne zinc-rich primer formulation. A performance comparison with a commercially available zinc-rich primer will also be discussed, specifically comparing adhesion, dry time, hardness, impact resistance, and salt spray corrosion resistance.Note de contenu : - RAW MATERIALS AND TESTING PANEL PREPARATION
- TESTING PROCEDURE : Dry time - Cross-hatch adhesion - König hardness - Mandrel bend flexibility - Impact resistance
- Fig. 1 : Phenoxy resin structure
- Table 1 : Physical properties of the control
- Table 2 : Physical properties of the phenoxy resin PKA
- Table 3 : Waterborne phenoxy-modified in 2K waterborne zinc-rich primer formula : a. Epoxy resin component - b. Curing agent componentEn ligne : https://drive.google.com/file/d/1HRUD5_KJug_0FmEN6WqqQhyWagavtJBq/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39425
in COATINGS TECH > Vol. 20, N° 3 (05-06/2023) . - p. 56-62[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24067 - Périodique Bibliothèque principale Documentaires Disponible Unique catalyst for low temperature cure epoxy powder coatings / Matthew Gadman in COATINGS TECH, Vol. 20, N° 1 (01-02/2023)
[article]
Titre : Unique catalyst for low temperature cure epoxy powder coatings Type de document : texte imprimé Auteurs : Matthew Gadman, Auteur ; John Florio, Auteur ; Matt C. Salvi, Auteur Année de publication : 2023 Article en page(s) : p. 18-33 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Basses températures
Bisphénol A
Blanc (couleur)
Catalyseurs
Epoxydes
Formulation (Génie chimique)
Homopolymères
Isocyanurate de triglycidyle
Méthacrylate de glycidyle
Polyacryliques
Réticulation (polymérisation)
Revêtements bi-composant
Revêtements organiques
Revêtements poudre
Rhéologie
Stabilité au stockage
ThermodurcissablesIndex. décimale : 667.9 Revêtements et enduits Résumé : Powder coatings continue to ba an attractive technology, primarily due to reduced volatile organic compound (VOC) emissions, ability to recycle overspray, and the exceptional film mechanical properties that can be attained. Despite the appeal, there are major drawbacks that need to be resolved for the technology to be effectively substitutable for liquid coatings. Note de contenu : - POWDER HISTORY AND TODAY'S MARKET : Launch of thermoset powder technology-innovation and low VOC initiatives : Circa 1950-1990 - Continued growth in a variety of markets-postmillennial - Environmentally aware consumers and VOC regulations : contemporary market
- A REVIEW OF THERMOSET POWDER TECHNOLOGIES : 1. Epoxy hybrids - 2. TGIC coatings (polyester) - 3. Acrylic systems - 4. Pure epoxy formulations
- CATALYSTS FOR EPOXY POWDER COATINGS :
- EXPERIMENTAL : Experiment I : Cure capabilities in acrylic/GMA-SB and pwoder formulations - Formulations, materials, and preparation of 2K SB acrylic/GMA and pwder acrylic/GMA - Rheology studies of 2K SB acrylic/GMA and pwder acrylic/GMA
- EXPERIMENT II : Accelerating epoxy homopolymerization : Formulations, materials, and preparation of catalyzed epoxy resins - Rheology studies of catalyzed BPA epoxy resins
- EXPERIMENT III : EVALUATION OF CATALYST PC IN FULLY FORMULATED WHITE EPOXY HYBRID POWDER : Formulations, materials, and preparation of white epoxy hybrid - Rheology studies of white epoxy hybrid - Film preparation of white epoxy hybrid - Film evaluation of white epoxy hybrid - Storage stability
- EXPERIMENT IV : EVALUATION OF CATALYST PC IN FULLY FORMULATED WHITE TGIC POWDER : Formulations, materials, and preparation of white TGIC formulation - Rheology studies of white TGIC formulation - Film preparation of white TGIC formulation - Film evaluation of white TGIC formulation - Storage stability
- Fig. 1 : Bisphenol-1 type epoxy resins, n ≥ 0
- Fig. 2 : Hydroxy ester formation via reaction of epoxides and carboxyl groups
- Fig. 3 : Triglycidylisocyanurate (TGIC) crosslinker
- Fig. 4 : Glycidyl methacrylate (GMA) monomer
- Fig. 5 : Dicyandiamide (DICY) crosslinker
- Fig. 6A : Initiating epoxy/amine polymerization
- Fig. 6B : Epoxy homopolymerization via catalysis by tertiary amine
- Fig. 6C : Deprotonation of hydroxyls and subsequent reactions with epoxy
- Fig. 6D : Amide formation via reaction of hydroxyl with nitrile
- Fig. 7A : Base catalysis : deprotonation of carboxylic acid*
- Fig. 7B : Base catalysis : interaction of conjugate acid with epoxide oygen
- Fig. 8 : Preparing powder disks using cylindrical pellet press
- Fig. 9 : Catalyst LC gel temperature in S B and powder acrylic/GMA system
- Fig. 10 : Log (lη*l) as a function of temperature : increasing dosages of catalyst LC
- Fig. 11 : Gel temperatures of white epoxy hybrid
- Fig. 12 : MEK resistance of white epoxy hybrids baked at various temperatures
- Fig. 13 : Impact resistance of white epoxy hybrid baked at various temperatures for 15 mn
- Fig. 14 : ΔΕ of catalyzed versus uncatalyzed white epoxy hybrid
- Fig. 15 : Pendulum and pencil hardness of white epoxy hybrid-bake temp./ 15 mn
- Fig. 16 : Log (lη*l) as a function of temperature-white TGIC formulation
- Fig. 17 : Impact resistance of white TGIC formluation - % active catalyst on TRS
- Fig. 18 : Gloss and color of white TGIC formulation-60° GU and b*
- Table 1 : Commonly used catalysts for epoxy reaction with carboxylic acids
- Table 2 : Physical properties of catalyst LC and catalyst PC
- Table 3 : 2K SB acrylic/GMA formulation
- Table 4 : Powder acrylic/GMA formulation
- Table 5A : Pre-experiment steps for SB oscillation tests
- Table 5B : Protocol for SB oscillation tests
- Table 6A : Pre-experiment steps for powder oscillation tests
- Table 6B : Protocol for powder oscillation tests
- Table 7 : Solventless BPA epoxy resin
- Table 8A : Pre-experiment steps for solventless epoxy oscillation tests
- Table 8B : Protocol for solventless oscillation tets
- Table 9 : Gel temp and onset temp of BPA epoxy resin with catalyst LC
- Table 10A : Breakdown of components of uncatalyzed white epoxy hybrid
- Table 10B : % breakdown of uncatalyzed and catalyzed white epoxy hybrid
- Table 11A : Pre-experiment steps for white epoxy hybrid oscillation tests
- Table 11B : Protocol for white epoxy hybrid oscillation tests
- Table 12 : Color values of white epoxy hybrid : L*, a*, b*
- Table 13 : Gloss properties of white epoxy hybrid-60° gloss units (GU)
- Table 14 : Uncatalyzed white TGIC formulationEn ligne : https://drive.google.com/file/d/1geR64CGC-_890pO1tV9GH-iQvIM2r4Eg/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38714
in COATINGS TECH > Vol. 20, N° 1 (01-02/2023) . - p. 18-33[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23812 - Périodique Bibliothèque principale Documentaires Disponible Unparalleled high quality : 2K PU coatings for auto refinish & transportation vehicles / Anup Phalke in PAINTINDIA, Vol. LXI, N° 11 (11/2011)
[article]
Titre : Unparalleled high quality : 2K PU coatings for auto refinish & transportation vehicles Type de document : texte imprimé Auteurs : Anup Phalke, Auteur Année de publication : 2011 Article en page(s) : p. 82-86 Langues : Anglais (eng) Catégories : Automobiles -- Revêtements:Automobiles -- Peinture
Polyuréthanes
Revêtements bi-composant
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Coatings for automotive refinishing should show the same high quality as OEM coatings. As OEM coatings are constantly improved and fine-tuned, refinishes need to keep up with their development. In addition, refinishing systems should be environmentally friendly and easy to use. Bayer MaterialScience provides a wide range of solventborne and waterborne systems for that purpose. They not only meet the processing requirements very well, but their quality matches those of finished OEM coatings as well. Two-component polyurethane systems are the state of the art technology for automotive refinishing. Aliphatic polyisocyanates and the choice for high performance two-component clear coat, primer and filler systems. Note de contenu : - Most important innovations in car refinish coating market
- Paint is not always just paint !
- Weathering
- Fullfill your dreams with easy savings
- Why by satisfied with less than the best ? : Aliphatic polyisocyanates : quality by nature
- Technologies for automotive refinish systems
- Putties based on unsaturated polyesters
- Two-component polyurethane primers and fillers
- Two-component polyurethane topcoat
- Basecoats and two-component polyurethane clear coats
- Innovation to satisfy the market trends for automotive refinish systemsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13824
in PAINTINDIA > Vol. LXI, N° 11 (11/2011) . - p. 82-86[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13562 - Périodique Bibliothèque principale Documentaires Disponible Unsaturated polyester-nanoclay nanocomposite coatings for effective corrosion protection of steel / Fekri Laatar in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 2 (03/2018)
[article]
Titre : Unsaturated polyester-nanoclay nanocomposite coatings for effective corrosion protection of steel Type de document : texte imprimé Auteurs : Fekri Laatar, Auteur ; Manuvel Jayan, Auteur ; Predeep Padmanabhan, Auteur ; Mohamed Ramzi Ben Romdhane, Auteur ; Ezzeddine Srasra, Auteur Année de publication : 2018 Article en page(s) : p. 293-301 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier inoxydable
Anticorrosifs
Anticorrosion
Métaux -- Revêtements protecteurs
Montmorillonite
Nanoparticules
Polyesters insaturésLes résines de polyesters insaturés (UP) sont obtenues par polycondensation
d’un ou de plusieurs diacides avec un ou plusieurs glycols, l’un, au moins, des constituants contenant une double liaison éthylénique susceptible de réagir ultérieurement sur un composé vinylique, acrylique ou allylique.
Par le terme résine polyester, on désigne en fait la dissolution du prépolymère polyester insaturé dans un solvant copolymérisable, le plus utilisé étant le styrène. C’est sous cette forme liquide que les résines polyesters sont livrées aux transformateurs.
Après addition de différents adjuvants, charges et renforts, divers procédés de transformation provoquent, sous l’action d’un système catalytique approprié, la copolymérisation finale de la résine en un objet thermodurcissable.
Les polyesters insaturés sont d’un usage relativement ancien (1950), essentiellement
dans le bâtiment (moulage au contact). Ils ont connu un renouveau important à partir de 1980, en particulier au niveau des formulations et de la fiabilité des procédés grâce au développement de technologies industrielles de moulage par injection et par compression dans l’industrie automobile.
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Polymeric composites are widely used to control the corrosion of metal surfaces. Various types of polymer nanocomposites provide better corrosion protection than the neat resins. This paper aims at reviewing some of the protective properties of Tunisian clay (montmorillonite-MMT)/unsaturated polyester (UP/MMT) in 3.5% NaCl. The spin coating technique is applied on metals deposited on a stainless steel surface. The samples are characterized with XRD, TEM and SEM methods. The corrosion performance was estimated by using open circuit potential, polarization measurements and electrochemical impedance spectroscopy. The UP/OMMT nanocomposites showed the best corrosion protection performance. Note de contenu : - EXPERIMENTAL : Materials - Preparation of unsaturated polyester based nanocomposites - Characterization of nanocomposite - Corrosion studies
- RESULTS AND DISCUSSION : X-ray diffraction analysis - TEM study - Corrosion study - SEM studyDOI : 10.1007/s11998-017-9977-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9977-7.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30283
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 2 (03/2018) . - p. 293-301[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19742 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Up to the mark : New water-borne roof-waterproofing coatings meet CE mark certification requirements Type de document : texte imprimé Année de publication : 2020 Article en page(s) : p. 32-37 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse mécanique dynamique
Etanchéité
Imperméabilisation
Polyacryliques
Polyuréthanes
Revêtements -- Propriétés mécaniques
Revêtements en phase aqueuse
Revêtements organiques
Toiture -- RevêtementsIndex. décimale : 667.9 Revêtements et enduits Résumé : Construction products must bear a CE mark if placed on the market in the European Economic Area. Liquid-applied roof-waterproofing coating products can achieve CE certification by passing the ETAG 005 durability standard. 1K solvent-borne polyurethane chemistry dominates the market in Europe, but is about to be challenged by a new water-borne acrylic polyurethane that meets ETAG 005. Note de contenu : - Introduction to liquid-applied roof waterproofing
- 1K PU dominant, but problematic
- New water-borne acrylic polyurethane polymer meets EU standards
- Polymers compared
- Outdoor exposure and demo case
- ETAG 005 durability results and certification
- Table 1 : Comparison of 1K PU, acrylic PU and acrylic polymers in roof waterproofing formulations
- Table 2 : Tensile force and elongation results after aging as required by ETAG 005
- Fig. 1 : Polymers under the atomic force microscope
- Fig. 2 : Polymers compared by means of dynamic mechanical analysis
- Fig. 3 : Long-term exposure of acrylic PU and standard acrylic in Philadelphia, USA
- Fig. 4 : Panels of acrylic PU and standard acrylic exposed for 41 months in Horgen, Switzerland
- Fig. 5 : Series of panels covered with white and grey acrylic PU membranes containing different film preservative levels and exposed for 29 months
- Fig. 6 : Roof application in Italy during June 2017En ligne : https://drive.google.com/file/d/1nnhtSRJ9Fb709eUPXTtBXsQQB1O6Z6D4/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34290
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 6 (06/2020) . - p. 32-37[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21779 - Périodique Bibliothèque principale Documentaires Disponible Urethane methacrylate reactive diluents for UV-curable polyester powder coatings / Theodore J. Hammer in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 2 (03/2021)
PermalinkUse of a fatty acid oxazoline derivative as a reactive diluent / Y. Berry-Walker in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 88, B4 (12/2005)
PermalinkUse of spiro-orthosilicates as blocked polyols/reactive diluents in high-solid PUR clear coats for car refinish applications / K. J. van der Berg in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 89, B4 (12/2006)
PermalinkUsing DMA and UV-Vis spectroscopy to predict the performance of wood coatings in outdoor use / F. Bulian in SURFACE COATINGS INTERNATIONAL, Vol. 94, N° 5 (10/2011)
PermalinkUsing electrically conductive polyaniline/polyvinyl alcohol hydrogel electrodes to perform electrodeposition of polysaccharides / Qinghua Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 6 (11/2023)
PermalinkUsing visible light to activate antiviral and antimicrobial properties of TiO2 nanoparticles in paints and coatings : focus on new developments for frequent-touch surfaces in hospitals / M. Schutte-Smith in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 3 (05/2023)
PermalinkUV-curable fluorinated polycarbonate polyurethane with improved surface properties / Yan Yuan in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 3 (05-06/2020)
PermalinkUV-curable superhydrophobic organosilicon/silica hybrid coating on cotton fabric for oil–water separation / Shan Gao in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 5 (09/2020)
PermalinkUV-curable waterborne epoxy acrylate coating modified by monomethacryloyloxy-terminated fluorinated oligomer / Hongyi Shi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 5 (09/2019)
PermalinkUV-curable waterborne polyurethane dispersions modified with a trimethoxysilane end-capping agent and edge-hydroxylated boron nitride / Huixiang Liu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 5 (09/2019)
PermalinkUV cure automotive refinish : clearcoats and primers at the speed of photons / Michael J. Dvorchak in COATINGS TECH, Vol. 19, N° 9 (11-12/2022)
PermalinkUV-curing of coatings with unsaturated polyesters with different structures / Vera Kornilova in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 209, N° 4650 (04/2019)
PermalinkPermalinkValidation of adhesion characterization methods for antistick coatings applied in cooking systems / Stefano Rossi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 4 (07/2022)
PermalinkValorization of almond shells' lignocellulosic microparticles for controlled release urea production : interactive effect of process parameters on longevity and kinetics of nutrient release / Babar Azeem in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 2 (03/2022)
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