Accueil
Catégories
Ajouter le résultat dans votre panier Affiner la recherche
Etendre la recherche sur niveau(x) vers le bas
[article]
Titre : Polysilazanes : Binders that make a difference to surfaces Type de document : texte imprimé Auteurs : Yang Wang, Auteur ; Ralf Grottenmuller, Auteur ; Theresa Lorenz, Auteur Année de publication : 2019 Article en page(s) : p. 38-45 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Essais accélérés (technologie)
Liants
Polysilazanes
Résistance au rayonnement ultraviolet
Résistance aux conditions climatiques
Revêtements -- Additifs:Peinture -- Additifs
Revêtements anti-graffitis
Revêtements organiques
Stabilité thermiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : Polysilazanes are pre-ceramic polymers with a silicon-nitrogen backbone. In recent years they have developed as a high-performance binder in protective coatings for transportation vehicles, commercial and residential buildings, and industrial plants. This article reviews their structure-property relationship and highlights their performance in high-temperature, surface hardness, weathering and corrosion protection, and anti-graffiti applications. Note de contenu : - Synthesis and process
- Heat stability
- Surface Hardness
- Weather and corrosion resistance
- Anti-graffiti properties
- Coating uniformity
- Fig. 1 : Polymer structures for PHPS and OPSZ, where R is H, CH3, CH=CH2, other alkyl, or aryl groups
- Fig. 2 : Polymer structures for PHPS and OPSZ, where R is H, CH3, CH=CH2, other alkyl, or aryl groups
- Fig. 3 : The two curing routes for OPSZ, where R1 and R2 are H, CH3, CH=CH2, other alkyl or aryl groups
- Fig. 4 : Thermal stability evaluation of polysilazanes. Panel A shows the results of TGA for polysilazanes and two commercial silicone resins. All materials were dried at 120°C for four hours before TGA to simulate the thermal stability of their coatings. Panel B shows a stainless-steel exhaust pipe coated with both PHPS and OPSZ-based TBC. Panel C compares the visual appearance of a coated and uncoated exhaust pipe after pyrolysis at 1000°C for one hour in air. Panels B and C were obtained from the Royal Society of Chemistry and Motz et al. at the University of Bayreuth with permission
- Fig. 5 : Characteristics of surface hardness for PHPS and OPSZ coatings. Panel A displays data of surface hardness for PHPS coatings on silicon substrates cured at different temperatures. These coatings have a film thickness of 1–1.2 μm. The hardness was measured via pencil hardness (in blue bars), Martens hardness (orange dots), and indentation resistance (black dots). The dots lines are guides for the eyes. Panel B shows a reference scale of pencil hardness, Martens hardness, and indentation resistance by using a bare glass and PMMA substrate. Panel C shows the anti-scratching property for a ∼3 μm thick OPSZ coating in clearcoat applications, and Panel D shows a similar performance for pigmented coatings. Both pigmented coatings have 17 wt% of pigment loading, a film thickness of 10–12 μm, and the right panel has 40 wt% polysilazane as a binder. Crockmeter test was performed by using an Atlas AATCC Crockmeter with 3M Wet-or-Dry 281Q rubbing cloth
- Fig. 6 : Panel A shows two steel substrates after a 10-day water condensation test at a constant humidity of 50%. They have an electrochemically deposited white basecoat with a film thickness of 15–20 μm that partially covers the substrates. The substrate on the left has a 3–4 μm thick polysilazane-based clearcoat, while the one on the right does not. Panel B shows a similar comparison of coated and uncoated areas on a steel substrate after three days of HCl vapor exposure at room temperature [a beaker of HCl solution (37 vol%) was placed in the test chamber]. The coating thickness is about 2 μm
- Fig. 7 : Panel A is a comparison of contact angle and surface energy for polysilazanes and three common binder materials, including nitrocellulose lacquer, acrylates, and polyurethanes. Also shown in Panel A is the value of the polar and dispersive component of surface energy, and surface energy is a sum of the polar and dispersive component. Panel B shows water drop shapes and contact angle measurements on a neat polysilazane coating and on a formulated polysilazane coating with other surface additives
- Fig. 8 : Panel A is a marker test to demonstrate the ink repellency and easy-to-clean properties for a polysilazane based clearcoat. The inset shows the results after cleaning with a dry towel. Panel B is the result of an anti-graffiti test performed on a similar coating according to ASTM D6578, where level 1—dry cloth, level 2—mild detergent solution, level 3— limonene-based cleaner, level 4—isopropanol, and level 5—methyl ethyl ketone, n.c.—not cleanable
- Fig. 9 : Three-dimensional surface morphology scans for a bare steel substrate (A), an OPSZ-based clearcoat on a steel panel (B), and a similar coating on a glass substrate (C). The polysilazane coating thickness is about 15 μm and 10 μm on the steel and the glass substrate, respectively
- Table 1 : DIN/EN/ISO tests that OPSZ-based coatingsz have successfully passed
- Table 2 : OPSZ coating performance before and after artificial weathering and UV stability testEn ligne : https://drive.google.com/file/d/1KuEizt3Csd6O2NpcxCtM9uj10C1GeiwC/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32737
in COATINGS TECH > Vol. 16, N° 6 (06/2019) . - p. 38-45[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 21023 - Périodique Bibliothèque principale Documentaires Disponible Polythioether advances provide new formulating / Christian Probst in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 27, N° 1 (01/2020)
[article]
Titre : Polythioether advances provide new formulating Type de document : texte imprimé Auteurs : Christian Probst, Auteur Année de publication : 2020 Article en page(s) : p. 12-15 Langues : Américain (ame) Catégories : Allongement à la rupture
Colles:Adhésifs
Durée de vie en pot
Epoxydes
Mastics
Polyacryliques
Polymères -- Propriétés mécaniques
Polythioéther
Résistance à la traction
Résistance au rayonnement ultraviolet
Résistance chimique
Revêtements organiquesIndex. décimale : 668.3 Adhésifs et produits semblables Résumé : colorless, toughening, and chemically resistive polythioether has been developed for the formulation of adhesives, sealants, and coatings. Note de contenu : - Reactivity
- Flexibility
- Chemical resistivity
- UV stability
- Applications
- Epoxy-terminated
- Fig. 1 : Chemical structure of the new polythioether
- Fig. 2 : Adjustment of pot life by variation of catalyst structure and amount
- Fig. 3 : Elongation at break and tensile strength of the polythioether compared to commercial toughening polyetheramines
- Fig. 4 : Schematic representation of the experimental setup. Test specimens before and after 21 days of exposure to different solvents
- Fig. 5 : Schematic representation of the experimental setum. Test specimen before and after 14 adys of exposure to UV lightEn ligne : https://www.adhesivesmag.com/articles/97449-polythioether-advances-provide-new-f [...] Format de la ressource électronique : Html Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33384
in ADHESIVES & SEALANTS INDUSTRY (ASI) > Vol. 27, N° 1 (01/2020) . - p. 12-15[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 21463 - Périodique Bibliothèque principale Documentaires Disponible Preparation and characteristics of graphene-based polymeric leather fatliquor / Zhenyu Zhang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 9 (09/2020)
[article]
Titre : Preparation and characteristics of graphene-based polymeric leather fatliquor Type de document : texte imprimé Auteurs : Zhenyu Zhang, Auteur ; Mengjie Cui, Auteur ; Zhonghui Wang, Auteur ; Haojun Fan, Auteur ; Yi Chen, Auteur ; Jun Xiang, Auteur ; Jun Yan, Auteur ; Jixin Ning, Auteur Année de publication : 2020 Article en page(s) : p. 337-346 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antibactériens
Blindage (électricité)
Caractérisation
Essais (technologie)
Essais de comportement au feu
Oxyde de graphène
Produits de nourriture du cuir
Résistance au rayonnement ultravioletIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Although the research of leather chemicals has experienced considerable advances, it remains imperative and challenging to develop functional ones ; especially functionalized fatliquors or retanning agents. In consideration with the unique structure and properties, graphene oxide (GO) has been reported as a potential alternative to ameliorate the performance of leather. However, one of the intractable handicaps is how to make graphene penetrate evenly and react with collagen fibers. Here, we demonstrate a method for preparing graphene-based polymeric fatliquor (PFGO) via an amidation reaction between amino-groups of aminated graphene (AGO) and anhydride bonds of maleic anhydride-rapeseed ouf copolymer (MRO), which was synthesized by free radical copolymerization. The results show that the as-prepared fatliquor has good emulsion stability and can penetrate into the collagen fibers uniformly. Compared with the control sample without graphene, the antibacterial, electromagnetic shielding, flame retardant and UV resistance characteristics of the PFGO-treated leather were significantly improved. Overall, this effective yet promising paradigm may provide an achievable solution toward developing graphene-based polymer composites simultaneously with high physical property and high functional performance. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of GO based faltiquor (PFGO) - Fatliquoring process
- CHARACTERIZATION AND PERFORMANCE TESTS : Instrument testing - Stability of fatliquor solution - SEM observation of leather - Antibacterial testing of fatliquor - Electromagnetic radiation shielding. Performance testing of leather - Flammability testing of leather - UV-resistance property testing of leather - Thermal stability testing of leather - Mechanical measurements
- RESULTS AND DISCUSSION : Characterization of AGO - Characterization of fatliquor - Distribution of fatliquor in leather - Antibacterial property of fatliquor - Electromagnetic shielding performance of leather - Flammability of leather - UV-resistance of fatliquored leatherDOI : https://doi.org/10.34314/jalca.v115i9.3849 En ligne : https://drive.google.com/file/d/1v5ccCkackiJzJmgK2tdNNEZKqF3muZUK/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34587
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXV, N° 9 (09/2020) . - p. 337-346[article]Réservation
Réserver ce document
Exemplaires (2)
Code-barres Cote Support Localisation Section Disponibilité 22340 - Périodique Bibliothèque principale Documentaires Disponible 22341 - Périodique Bibliothèque principale Documentaires Disponible Pressure-sensitive adhesives 101 / Kurt Schramer in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 16, N° 9 (10-11/2009)
[article]
Titre : Pressure-sensitive adhesives 101 Type de document : texte imprimé Auteurs : Kurt Schramer, Auteur Année de publication : 2009 Article en page(s) : p. 34-39 Langues : Américain (ame) Catégories : Adhésifs sensibles à la pression
Adhésion
Procédés de fabrication
Résistance à l'humidité
Résistance au cisaillement
Résistance au rayonnement ultraviolet
Résistance thermiqueIndex. décimale : 668.3 Adhésifs et produits semblables Résumé : Pressure-sensitive adhesives (PSAs) are used in applications ranging from labeling food packaging to assembling electronic devices to mounting graphics displays. Although they have been around for decades and their use is widespread, manufacturers, converters, and printers may not understand the key differences between the adhesive choices available, how they’re constructed, or which are best suited for a particular job.
This article explains what a PSA is, how it’s constructed and what adhesive options are available. The advantages and disadvantages of the primary adhesive types will be addressed, as well as how they are formulated and their common applications.Note de contenu : - What is PSA ?
- PSA constructions
- Manufacturing methods for PSAs
- Common adhesive types and their properties
- Final considerations
- FIGURE : General comparison of common pressure-sensitive adhesive technologiesEn ligne : http://www.adhesivesmag.com/articles/88511-pressure-sensitive-adhesives-101 Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25896
in ADHESIVES & SEALANTS INDUSTRY (ASI) > Vol. 16, N° 9 (10-11/2009) . - p. 34-39[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 011694 - Périodique Bibliothèque principale Documentaires Disponible Radiation-curable pressure-sensitive adhesives in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 23, N° 9 (09/2016)
[article]
Titre : Radiation-curable pressure-sensitive adhesives : Radiation-curable pressure-sensitive adhesives provide advantages for multiple applications. Type de document : texte imprimé Année de publication : 2016 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésifs -- Séchage sous rayonnement électronique
Adhésifs sensibles à la pression
Collage
Photoréticulation
Résistance au cisaillement
Résistance au rayonnement ultraviolet
RhéologieRésumé : Regulations on volatile organic compound (VOC) emission have caused solventborne pressure-sensitive adhesives (PSAs) to be gradually replaced by hot-melt or waterborne PSAs. However, for industrial specialty tape applications, solventborne technology still dominates. This is mainly because hot-melt and waterborne PSAs cannot deliver high enough performance, including high peel strength, high tack, and high shear. With the more stringent regulations on VOCs, there is an urgent market need for a new technology to replace solventborne systems for such specialty applications.
Over the last two years, a series of innovative formulated products have been designed and developed to provide a solution to this market need. For example, a 100% solids radiation-curable syrup system can deliver the high performance that industrial specialty tape requires. The key benefits of this technology include, but are not limited to :
• 100% solids without VOCs
• High productivity
• No heat required during converting process
• High performance on both high- and low-surface-energy substratesNote de contenu : - Sample Preparation
- 180° Peel Strength
- Probe Tack
- Shear Resistance
- Rheology PropertyEn ligne : http://www.adhesivesmag.com/articles/94868-radiation-curable-pressure-sensitive- [...] Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28955
in ADHESIVES & SEALANTS INDUSTRY (ASI) > Vol. 23, N° 9 (09/2016)[article]Le rôle du finissage dans la protection des cuirs face aux éléments extérieurs / J. Hillion in TECHNICUIR, N° 10 (12/1973)
PermalinkSilicone intermediate for weather-resistant coatings / Birgit Richter in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 202, N° 4569 (02/2012)
PermalinkPermalinkStudy on the ultraviolet absorbing properties of cotton fabric finished with boron and nitrogen co-doped carbon dots / Shijie Cheng in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 4 (07/2022)
PermalinkSynthesis of modified hydrogenated castor oil/nano-ZnO composites and its application as fatliquoring agent / Duan Limin in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 99, N° 4 (07-08/2015)
PermalinkTailoring crosslinking performance / Pär Jörgensen in EUROPEAN COATINGS JOURNAL (ECJ), N° 6 (06/2015)
PermalinkThe effect of zinc oxide nanoparticles on the weathering performance of wood-plastic composites / Sefa Durmaz in COLORATION TECHNOLOGY, Vol. 139, N° 4 (08/2023)
PermalinkPermalinkThe use of mixed tocopherols to improve UV and heat resistance of leather / Cheng-Kung Liu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CV, N° 1 (01/2010)
PermalinkTôles prélaquées - Méthodes d'essai. Partie 10 : Résistance à un rayonnement UV fluorescent et à la condensation de l'eau - Norme EN 13523-10 / Comité Européen de Normalisation / Bruxelles : Comité Européen de Normalisation (2010)
PermalinkTransparent long-life UV-protection / Lars Leidolph in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 200, N° 4554 (11/2010)
PermalinkUltraviolet and thermostable non-isocyanate polyurethane coatings / O. Figovsky in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 88, B1 (03/2005)
PermalinkUndertanding thickening stabilising polymers / Alicia Roso in PERSONAL CARE EUROPE, Vol. 3, N° 3 (09/2010)
PermalinkVersatile and valuable / Misty Huang in ADHESIVES AGE, Vol. 45, N° 4 (04/2002)
PermalinkPermalink