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Novel acrylic polymer for architectural exterior paint and primer in one coatings application / Kaliappa Ragunathan in COATINGS TECH, Vol. 15, N° 2 (02/2018)
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Titre : Novel acrylic polymer for architectural exterior paint and primer in one coatings application Type de document : texte imprimé Auteurs : Kaliappa Ragunathan, Auteur ; Punit Thakkar, Auteur Année de publication : 2018 Article en page(s) : p. 30-37 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosion
Essais accélérés (technologie)
Formulation (Génie chimique)
Polyacryliques
Résistance à l'efflorescence
Résistance à l'humidité
Résistance à la salissure
Résistance au nettoyage
Résistance chimique
Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques
Revêtements en bâtiment:Peinture en bâtiment
Revêtements en phase aqueuse:Peinture en phase aqueuse
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Architectural exterior coatings are subject to the harsh elements of the environment. Careful consideration must be paid to these harsh conditions to overcome deleterious effects of these elements. The novel polymer developed using innovative polymer engineering has outstanding performance for paint and primer in one exterior coatings application. This polymer can be used to formulate <25 g/l VOC coatings. A benchmark study involving market leading competitive binders shows that the novel polymer outperforms in DPUR, leaching resistance, tannin blocking, efflorescence resistance, scrub resistance, corrosion resistance, gloss retention, and tint strength. Natural weathering shows excellent results at 36 months of testing. Note de contenu : - FACTORS IMPACTING CRITICAL PERFORMANCE FEATURES : Dirt pick-up resistance (DPUR) - Conflicting demands : film formation at low VOC and DPUR - Leaching resistance - Tannin blocking and efflorescence resistance - Grain crack resistance
- NOVEL POLYMER
- EXPERIMENTAL : Dirt pick-up resistance - Surfactant leaching - Efflorescence resistance - Early rain resistance - Tannin blocking - Corrosion resistance
- RESULTS AND DISCUSSION : Dirt pick-up resistance - Surfactant resistance - Early rain resistance - Tannin blocking - Efflorescence resistance - Corrosion resistance - Paint film mechanical properties - Accelerated weathering - Natural weathering
- FIGURES : 1. Film formation in emulsion polymrs - 2. Leaching in exterior wall - 3. More dirt in leached trail - 4. Tannin migration from redwood to coatings. Superior performing polymers (green box) block tannin migration, as compared to one coat of an inferior paint (red box) where the brown color of the tannin migrates through - 5. Efflorescence on concrete surface - 6. Coatings on southern yellow pine boards showing both poor (red box) and excellent grain crack resistance - 7. Dirt pick-up resistance - 8. DPUR (carbon black and red iron oxide dispersions) - 9. Leaching resistance rating - 10. Early rain resistance - 11. Redwood tannin blocking - 12. Redwood tannin blocking - 13. Efflorescence resistance - 14. Corrosion resistance of cold rolled steel - 15. Gloss change in accelerated weathering study (UV-A radiation) - 16 Spider diagram comparing performance of the coatings
- TABLES : 1. Novel polymer physical properties - 2. White flat formulation - 3. White flat formulation physical characteristics - 4. Paint properties - 5. Mechanical properties of white flat paints - 6. Color change ΔE in accelerated weathering study (UV-A radiation) - 7. Natural weathering results at 36 months of testingEn ligne : https://drive.google.com/file/d/1EXffywNJYoGhj7IIy44-nEJOH7ntkhOz/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30052
in COATINGS TECH > Vol. 15, N° 2 (02/2018) . - p. 30-37[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19642 - Périodique Bibliothèque principale Documentaires Disponible A novel approach for new cost-saving durable anticorrosive and antibacterial coatings / Walaa M. Abd El-Gawad in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 5 (09/2019)
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Titre : A novel approach for new cost-saving durable anticorrosive and antibacterial coatings Type de document : texte imprimé Auteurs : Walaa M. Abd El-Gawad, Auteur ; Nivin M. Ahmed, Auteur ; Wael S. Mohamed, Auteur ; Eglal R. Souaya, Auteur Année de publication : 2019 Article en page(s) : p. 1263-1281 Note générale : Bibliogr. Langues : Américain (ame) 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.
Antibactériens
Anticorrosifs
Anticorrosion
Copolymérisation
Essais accélérés (technologie)
Evaluation
Matériaux -- Propriétés fonctionnelles
Matériaux hybrides
Métaux -- Revêtements protecteurs
Spectroscopie d'impédance électrochimique
ZéolitesIndex. décimale : 667.9 Revêtements et enduits Résumé : Multifunctional coatings that perform various actions simultaneously are now of prevailing importance, with zeolites being one of the most useful materials in this field. In this work, Na-P-zeolite was prepared from kaolin and subjected to a cation-exchange process to replace Na+ by Cu2+ and/or Zn2+ to achieve anticorrosive and antibacterial effects. In situ emulsion polymerization of vinyl acetate-vinyl versatate (VAc-VEOVA) copolymer at the nanoscale with P-zeolite and Zn-, Cu-, Zn/Cu-cation-exchanged P-zeolites was then applied to obtain P-zeolite-(VAc-VEOVA), Zn-P-zeolite-(VAc-VEOVA), Cu-P-zeolite-(VAc-VEOVA), and Zn/Cu-P-zeolite-(VAc-VEOVA) nanocomposites. Anticorrosive and antibacterial tests were then carried out on films containing the different nanocomposites using laboratory accelerated testing, electrochemical impedance spectroscopy (EIS), and the disc well diffusion method with different types of Gram-positive (G+) and Gram-negative (G−) bacteria, revealing that the film containing the mixed (Zn/Cu)-P-zeolite showed the best anticorrosive and antibacterial performance. Note de contenu : - EXPERIMENTAL : Materials - Preparation of P-zeolite - Prepration of cation-exchanged P-zeolites - Preparation of (VAc-VEOVA) copolymer nanocomposites by in situ emulsion polymerization - Paint preparation - Preparatin of steel panels for anticorrosion testing - Preparation of specimens for antibacterial testing
- METHODS OF TESTING AND EVALUATION OF PAINTS : Anticorrosion measurements
- RESULTS AND DISCUSSION : Characterization of P-zeolite and cation-exchanged P-zeolites - Characterization of the prepared nanocomposites - Anticorrosion performance of paints containing P-zeolite and cation-exchanged P-zeolites - Antibacterial results for cation-exchanged P-zeolites and their paint formulationsDOI : 10.1007/s11998-019-00202-9 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-019-00202-9.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33010
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 5 (09/2019) . - p. 1263-1281[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21154 - Périodique Bibliothèque principale Documentaires Disponible Novel CNSL-based waterborne Zn-rich primer systems for protective coatings / Hong Xu in COATINGS TECH, Vol. 15, N° 4 (04/2018)
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Titre : Novel CNSL-based waterborne Zn-rich primer systems for protective coatings Type de document : texte imprimé Auteurs : Hong Xu, Auteur ; Fernanda Tavares, Auteur ; Anbu Natesh, Auteur ; Jing Li, Auteur Année de publication : 2018 Article en page(s) : p. 34-42 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Application directe sur le métal
Brillance (optique)
Cardanol
Epoxydes
Essais d'adhésion
Essais de brouillard salin
Formulation (Génie chimique)
Métaux -- Revêtements protecteurs
Noix de cajou et constituants
Phénalkamines
Polyuréthanes
Primaire (revêtement)
Réticulants
Revêtements -- Finition
Revêtements -- Propriétés mécaniques
Revêtements bi-composant
Revêtements en phase aqueuse
Rhéologie
ZincIndex. décimale : 667.9 Revêtements et enduits Résumé : Low-VOC waterborne (WB) Zn-rich primers and high performance WB epoxy primers have been developed based on novel Cashew Nutshell Liquid (CNSL)-derived curing agents for industrial and protective coating applications. These unique WB phenalkamines were synthesized from a natural, non food chain and renewable biomaterial and could help formulate WB primer systems that meet stricter volatile organic compound (VOC) regulations as well as high performance requirerments.
This article presents the latest performance studies of new phenalkamine-based WB Zn-rich primers and epoxy primers, and discusses the challenges associated with such formulations.
New 2K WB Zn-rich primers were formulated with a water-free phenalkamine curing agent. The study results showed the WB Zn-rich primers had good compatibility with various commercially available solid epoxy dispersions and delivered good cure and mechanical properties ; importantly, those WB Zn-rich primers provided superb adhesion to both metal substrates and commercial polyurethane (PU) topcoats without the use of adhesion promoters. Excellent corrosion protection and good resistance to undercutting of the scribe were observed after 3000-h Q-Fog exposure.
Additionally, newly developed WB high performance primers based on zero-VOC WB phenalkamines were evaluated either in combination with WB Zn-rich primers or by being directly applied over metal substrates was found that those WB epoxy primers could enhance corrosion protection as mid-coats to WB Zn-rich primers ; when being used direct-to-metal, WB epoxy primers also exhibited good mechanical and adhesion properties that benefited the overall anticorrosion performances.Note de contenu : - Part I : Waterborne (WB) Zn-rich primer study
- Part II : Waterborne (WB) mid-coat systems based on new WB-C curing agent
- Part III : Wet-on-wet properties
- FIGURES : 1. Cashew apple and nutshell - 2. Average cardanol structure - 3. Example of phenalkamine structure - 4. Panel images of cross-hatch adhesion tests - 5. Panel images after 120h salt spray exposure - 6. Panel images after 4000-h salt spray exposure - 7. Panel images after 1200-h salt spray exposure - 8. Panel images after 2400-h salt spray exposure (surface rusts were removed via scratch pad) - 9. Panel images after 2300-h salt spray exposure (WB Zn-rich primer systems topcoated with a red iron oxide mid-coat) - 10. Panel images after scribe and wet adhesion testing - 11. Mixing viscosity changes as a function of the percentage of added water - 12. Linear dry time of various systems based on WB-C - 13. Panel images of resin 1+WB-C clear coating-system after 1200-h salt spray exposure - 14. Panel images of MC#1 and MC#2 systems after 271 and 767-h salt spray exposure - 15. Panel image of WB Zn-rich#4 primer system topcoated with MC#2 mid-coat primer after 1685-h salt spray exposure - 16. Photo images of the panels after wet-on-wet adhesion tests
- TABLES : 1. Waterborne curing agents : typical properties - 2. Typical properties of solid epoxy dispersion resins - 3. WB Zn-rich primer formulations by using WB-A curing agent - 4. Mechanical properties of WB Zn-Rich primers - 5. WB mid-coat formulations based on WB-C - 6. Adhesion and anticorrosion performances of MC#2 systems as a function of mixing times - 7. Mechanical and adhesion properties of MC#2 - 8. Gloss comparisonEn ligne : https://drive.google.com/file/d/1QsQ8l4uOx13cFvlKXZElv8uh5js2daAr/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30518
in COATINGS TECH > Vol. 15, N° 4 (04/2018) . - p. 34-42[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19857 - Périodique Bibliothèque principale Documentaires Disponible Novel hyperbranched polyaspartic ester-soybean oil hybrid polyurethane-urea coating for high performance and anticorrosive application / Kumar Rajnish in PAINTINDIA, Vol. LXVII, N° 5 (05/2017)
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Titre : Novel hyperbranched polyaspartic ester-soybean oil hybrid polyurethane-urea coating for high performance and anticorrosive application Type de document : texte imprimé Auteurs : Kumar Rajnish, Auteur ; Ramanuj Narayan, Auteur Année de publication : 2017 Article en page(s) : p. 55-62 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Anticorrosifs
Anticorrosion
Brillance (optique)
Copolymère uréthane-urée
Esters polyaspartiques
Huile de soja
Hydroxylation
Polymères ramifiés
Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Hyperbranched polymers (HBP) are the best choice for high solid and excellent performance polyurethane (PU) coatings and structural materials. Polyaspartic ester polyol based PU-ureas, which are highly unexplored, give good gloss, improved (higher) reaction time, high film build up in a single coat, better leveling and adhesion to a number of substrates with wide application area. We have synthesized a hyperbranched polyaspartic-ester polyol (HPASP) with high atom economy and solvent-free condition via A, + B,B' polycondensation in 'one pot' but two steps. The polyol was reacted with H12MD1 to form one pack high solid moisture-cured PU-urea coatings. The coating exhibited excellent mechanical, thermal, gloss and anticorrosive properties. Keeping the broader application as well as industrial viability in mind, we modified the PU coating to improve flexibility and reduce cost without compromising with the properties. For this, hydroxylated soybean oil (SO) was added to HPASP in various ratios to make PU-ureas based on H12MDI. The PU-ureas based on polyaspartic ester polyol and their SO hybrids showed better reaction control than similar HBP-polyurethanes. The hybrid polyaspartic PU-urea coating films have shown good thermal stability with high gloss transition temperature (Tg). The gloss of all the hybrid coating films was high and the mechanical properties were excellent, some even better than HPASP based PU-urea films. The anticorrosion property of all the coatings was studied using electrochemical technique (Tafel plot) and Pound to be very good. Note de contenu : - EXPERIMENTAL : Characterization techniques - Synthesis of polyaspartic ester polyol and corresponding polyurethane-urea films -
- RESULTS AND DISCUSSION : Thermal properties - Thermo-mechanical properties - Abrasion and gloss properties - Anticorrosion properties
- SCHEMES : 1. Aspartic acid and polyaspartic-ester respectively - 2. HPASP synthesis - 3. Polyaspartic PU-urea formation
- FIGURES : 1a. TGA thermograms of various aspartic PU-urea films - 1b DTA thermograms of various aspartic PU-urea films - 2a and b. Storage modulus Vs temp and tan ? Vs temp respectively - 3. Electrochemical corrosion data (Tafel) of polyaspartic PU and SO hybrid coated mild steel
- TABLES : 1. TGA and DMTA results of polyaspartic PU-urea films - 2. Tensile, abrasion and gloss values of polyaspartic PU and SO hybrids - 3. Electrochemical corrosion data of polyaspartic PU and SO hybrid coated mild steelEn ligne : https://drive.google.com/file/d/1i3Z-Gl6Dc-GifR-071JAZD708I7aaWI4/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28871
in PAINTINDIA > Vol. LXVII, N° 5 (05/2017) . - p. 55-62[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19144 - Périodique Bibliothèque principale Documentaires Disponible Novel inorganic/organic coatings based on linseed oil and sunflower oil with sol-gel precursors / Scott J. Tuman in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 68, N° 854 (03/1996)
[article]
Titre : Novel inorganic/organic coatings based on linseed oil and sunflower oil with sol-gel precursors Type de document : texte imprimé Auteurs : Scott J. Tuman, Auteur ; Mark D. Soucek, Auteur Année de publication : 1996 Article en page(s) : p. 73-81 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alkoxyde
Anticorrosion
Formulation (Génie chimique)
Huile de linL'huile de lin ou "huile de graines de lin" est une huile de couleur jaune d'or, tirée des graines mûres du lin cultivé, pressées à froid et/ou à chaud ; parfois elle est extraite par un solvant, en vue de l'usage industriel ou artistique, principalement comme siccatif, ou huile auto-siccative.
Les utilisations de l'huile de lin dérivent de sa richesse en acides gras polyinsaturés, en particulier en acides linolénique et linoléique, qui lui doivent leur nom.
L'huile de lin polymérise spontanément à l'air, avec une réaction exothermique : un chiffon imbibé d'huile peut ainsi, dans certaines conditions, s'enflammer spontanément.
Pour ses propriétés de polymère, l'huile de lin est employée seule, ou mélangée à d'autres huiles, résines et solvants, et est utilisée en tant que : Imprégnateur et protecteur des bois à l'intérieur comme à l'extérieur : protection contre l'humidité, les champignons et insectes, et contre la poussière par son caractère antistatique, composant de certains vernis de finition, liant de broyage pour la peinture à l'huile, agent plastifiant du mastic de vitrier, agent durcisseur de diverses préparations, agent de cohérence et liant dans la fabrication du linoléum.
Huile de tournesol
Huiles et graisses végétales
Matériaux hybrides
Polymères
Primaire (revêtement)
Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques
SiccatifsUn siccatif est une substance qui joue un rôle de catalyseur en accélérant le séchage ou durcissement (polymérisation) d'un matériau tel une huile ou une peinture à base d'huile (pour le bâtiment ou les artistes).
Sol-gel, Procédé
Titane isopropanolateIndex. décimale : 667.9 Revêtements et enduits Résumé : New inorganic/organic hybrid coatings have been prepared utilizing linseed oil and sunflower oil as an organic phase and two sol-gel precursors [titanium (IV) i-propoxide, titanium (di-i-propoxide) bis(acetyl-acetonate)] as an inorganic phase. The ultimate goal is to develop a primer that will provide better adhesion and corrosion protection for metal substrates with minimal environmental impact. Coatings with a range of sol-gel precursor to drying oil ratios have been studied. Various coatings properties such as adhesion, hardness, impact resistance, and flexibility were observed as a function of sol-gel precursor content. In addition, the tensile properties and thermo-oxidative stabilities were also investigated. During processing, the sol-gel precursors appear to accelerate the drying of the coatings. Higher sol-gel precursor content increased both tensile strength and tensile modulus but decreased flexibility and strain-at-break. The thermo-oxidative stability was similar to drying oil coatings cured with driers. Note de contenu : - EXPERIMENTAL : Materials - Coating preparation - Coating evaluation Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18471
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 68, N° 854 (03/1996) . - p. 73-81[article]Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 003524 - Périodique Bibliothèque principale Documentaires Exclu du prêt Novel magnesium based anti-corrosion pigments / Arieh Calahora in PAINTINDIA, Vol. LXIV, N° 7 (07/2014)
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PermalinkOME-based corrosion inhibitor to improve environmental performance / John Hughes in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 204, N° 4597 (06/2014)
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