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Hydroxyl-terminated polybutadiene liquid resins for adhesives applications / Taejun Yoo in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 24, N° 1 (01/2017)
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Titre : Hydroxyl-terminated polybutadiene liquid resins for adhesives applications : Hydroxyl-terminated polybutadiene resin-based polyurethane elastomers offer solutions to strenuous applications in the sealants and adhesives market Type de document : texte imprimé Auteurs : Taejun Yoo, Auteur ; Herbert Chao, Auteur Année de publication : 2017 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésifs dans les équipements électriques/électroniques
Colles:Adhésifs
Contraintes thermiques
Elastomères
Encapsulation
Formulation (Génie chimique)
Hydrostabilité
Joints d'étanchéité
Mastics
Polybutylène téréphtalate
Polymères à terminaison hydroxyle
PolyuréthanesIndex. décimale : 668.3 Adhésifs et produits semblables Résumé : Hydroxyl-terminated polybutadiene (HTPB) resins occupy a unique space within the landscape of commercially available polyols in the context of polyurethane elastomers. Characterized by low temperature flexibility, hydrophobicity and hydrolytic stability, polyurethane elastomers present solutions to strenuous applications in the adhesives and sealants market. Due to the hydrocarbon nature of the polymer backbone, these elastomers also have extremely low dielectric constant, dissipation factor, and moisture vapor transmission rate (MVTR) properties.
With the fast growth of the information industry, electronic products such as mobile phones, personal digital assistants and notebooks have become daily necessities for many of us. Multifunctional urethane (meth)acrylates derived from hydrogenated HTPB resins, which have excellent properties against oxidation and a relatively high refractive index of about 1.5, have gradually established their use as essential ingredients in UV-cured compositions in a clear optical index-matched adhesive for the bonding of two or more optical components together.Note de contenu : - Encapsulants
- Hydrolytic Stability
- Thermal shock/embedment stress
- Low exotherm and minimal shrinkage
- Liquid optically clear adhesive
- Ideal ingredients
- FIGURES : 1. Chemical modification of HTPB - 2. MVTR of encapsulation resins - 3. Schematic diagram of IGU
TABLES : 1. Differences between anionically and radically of polymerized HTPB resins - 2. Series A resin system for encapsulant - 3. Starting point formulation using series A resin R-45HTLO as the base resin for an insulating glass window sealantEn ligne : http://www.adhesivesmag.com/articles/95157-hydroxyl-terminated-polybutadiene-liq [...] Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28763
in ADHESIVES & SEALANTS INDUSTRY (ASI) > Vol. 24, N° 1 (01/2017)[article]Hyperbranched polymers - A novel class for high performance coatings / Tirthankar Jana in PAINTINDIA, Vol. LXVI, N° 3 (03/2016)
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Titre : Hyperbranched polymers - A novel class for high performance coatings Type de document : texte imprimé Auteurs : Tirthankar Jana, Auteur Année de publication : 2016 Article en page(s) : p. 59-69 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Copolymère silicone acrylate
DendrimèresUn dendrimère 1,2est une molécule dont la forme reprend celle des branches d'un arbre. Le nom vient du grec "δενδρον"/dendron, signifiant "arbre". En 1979, le premier dendrimère a été synthétisé par D.A. Tomalia3 et d'autres chercheurs de la Dow Chemical Company, et des dendrimères ont depuis été étudiés partout dans le monde pour leur forme unique.
Dans la synthèse des dendrimères, les monomères mènent à un polymère monodisperse, tel un arbre4. Il y a deux méthodes définies de synthèse des dendrimères: synthèse divergente5,6 et synthèse convergente7. La première assemble la molécule du noyau jusqu'à la périphérie et le second de l'extérieur vers le noyau.
Les propriétés des dendrimères sont engendrées par les structures moléculaires présentes sur sa surface. Par exemple, un dendrimère peut être hydrosoluble quand son extrémité-groupe est un groupe hydrophile, comme un groupe carboxylique. Il est théoriquement possible de concevoir un dendrimère hydrosoluble avec l'hydrophobicité interne, qui lui permettrait de porter un composé hydrophobe dans son intérieur (afin de transporter un composé thérapeutique hydrophobe dans le sang par exemple).
Une autre propriété est que le volume d'un dendrimère augmente quand il a une charge positive. Si cette propriété peut être appliquée, des dendrimères peuvent être employés pour les systèmes de transport d'éléments chimiques qui peuvent donner le médicament à la partie visée à l'intérieur du corps d'un patient directement (tumeur par exemple).
Les applications sont très diverses comme un élément organique électroluminescent, comme substitut sanguin, traitement anti-cancer, outils pour la multiplication de cellules, mais aussi en matériaux lors d'associations avec des nanotubes ou comme sondes sélectives et efficaces.
Hydrophobie
Polyalkydes
Polyesteramides
Polyesters
Polyéthers
Polymères -- Synthèse
Polymères aliphatiques
Polymères ramifiés
Polyuréthanes
Surfaces fonctionnellesIndex. décimale : 667.9 Revêtements et enduits Résumé : Development of high performance resin for low VOC coating is of great interest due to the adverse effect on health, safety and environmental issues. Development of high solid resin is an important technique for low VOC coating. The simplest way of synthesising high solid resin is decreasing its molecular weight. But the performance of such type of low molecular weight resin is not satisfactory for coating application. Development of highly branched polymers helps to achieve low viscosity, high surface functionalities, high reactivity and more compact globular structures, which have potential scope for coating application.
In this paper, the special properties of hyperbranched polymers and recent advances on the development of such type of resins and their modifications, particularly for coating application have been described.Note de contenu : - Structural aspects of dendritic polymer
- Classification of dendritic polymer
- Methodology for synthesis of dendritic polymer
- A comparison with linear and dendritic of hyperbranched polymers
- Characterization techniques of dendritic and hyperbranched polymer
- Properties of dendritic and hyperbranched polymer
- Scope of hyperbranched polymer for coating application
- Commercially available hyperbranched polymers for coatings application
- Recent research trend for development of hyperbranched polymer for coating application : High solid hyperbranched air drying alkyd - High solid hyperbranched alkyd for one pack polyurethane system - High solid hyperbranched alkyd/polyester for two pack polyurethane - Hyperbranched polyester amide - Hyperbranched polyester resin for water dispersible system - Hyperbranched polyester for UV curable system - Castor oil based hyperbranched polyurethane resinEn ligne : https://drive.google.com/file/d/1RhIy1gQIZKmEYOUC8OhER6VpI5tDEHz1/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26234
in PAINTINDIA > Vol. LXVI, N° 3 (03/2016) . - p. 59-69[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18060 - Périodique Bibliothèque principale Documentaires Disponible Hyperbranched polyurethane based high-solid protective coating for marine application / R. Baloji Naik in PAINTINDIA, Vol. LXVIII, N° 12 (12/2018)
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Titre : Hyperbranched polyurethane based high-solid protective coating for marine application Type de document : texte imprimé Auteurs : R. Baloji Naik, Auteur ; G. Gunasekaran, Auteur ; D. Ratna, Auteur Année de publication : 2018 Article en page(s) : p. 53-66 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adhésion
Anticorrosifs
Anticorrosion
Essais accélérés (technologie)
Essais dynamiques
Formulation (Génie chimique)
Haut extrait sec
Marines (peinture)
Pigments inorganiques
Polymères ramifiés
Polyuréthanes
Résistance aux conditions climatiques
Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques
Revêtements antisalissures:Peinture antisalissures
Revêtements bi-composant:Peinture bi-composant
Spectroscopie d'impédance électrochimiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : High-solid two-pack paint formulations based on hyperbranched alkyd polyol (HBA) and isocyanate curing agents were developed for high performance exterior coating application. The base component consists of a hyperbranched alkyd polyol (HBA) resin and a mixture of pigments like titanium dioxide, yellow iron oxide, carbon black and talc. The pigments were dispersed in the HBA resin using a ball milI for a period of 6 - 7 h. The base component is then cured separatly with two different types of isocyanate curing agents such as aliphatic isocyanate (Desmodur N3390) and cycloaliphatic isocyanate (Desmodur Z4470). These experimental paint compositions were applied on mild steel specimens coated with epoxy red oxide primer (two coats of primer and two coats of exterior grey paint). The coating systems were evaluated for adhesion, tensile, corrosion and weathering resistance properties. For comparison, specimens of the conventional (silicone alkyd) paint was also prepared and tested. Results indicate that the developed coating composition have superior mechanical, corrosion resistance and weathering resistance properties compared to the conventional silicone alkyd coating. Note de contenu : - EXPERIMENTAL : Materials - Design of HBUA based high solid paint formulations - Mechanical properties - Adhesion strength - Evaluation of resistance to accelerated weathering - Evaluation of corrosion resistance property under different exposure conditions - Electrochemical impedance spectroscopy (EIS)
- RESULTS AND DISCUSSION : Physical properties - Mechanical properties - Abrasion, scratch, impact resistance and flexibility tests - Adhesion strength - Accelerated weathering test - Accelerated corrosion test - Electrochemical impedance spectroscopyEn ligne : https://drive.google.com/file/d/1bTS6N1nH82_lqCplbUj3uv8mXD11kQXi/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31933
in PAINTINDIA > Vol. LXVIII, N° 12 (12/2018) . - p. 53-66[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20674 - Périodique Bibliothèque principale Documentaires Disponible Hyperbranched polyurethanes with flammability resistance for leather retanning / Sheng Ding in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 10 (10/2022)
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Titre : Hyperbranched polyurethanes with flammability resistance for leather retanning Type de document : texte imprimé Auteurs : Sheng Ding, Auteur ; Yiban Wu, Auteur ; Zhu Jinxing, Auteur ; Saiqi Tian, Auteur Année de publication : 2022 Article en page(s) : p. 441-447 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Calorimétrie
Caractérisation
Cuirs et peaux -- Propriétés mécaniques
Essais (technologie)
Inflammabilité
Mesure
Polymères -- Synthèse
Polymères ignifuges
Polymères ramifiés
Polyuréthanes
Retannage
Wet-blue (tannage)Peau tannée au chrome (le chrome donne une couleur bleue)Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : In this study, diethyl bis(2-hydroxyethyl) aminomethyl phosphonate was modified by hexamethylene diisocyanate, and then was utilized to partly replace the isocyanates to prepare hyperbranched polyurethanes (HPU-DPAs). The hyperbranched polyurethanes were then employed in the retanning process of wet blue. The shrinkage temperature, average thickness as well as mechanical properties of leather before and after retanning were acquired. The flammability of retanned leather was measured by cone calorimeter test. The morphologies of wet blue and leather after retanning by HPU-DAP were obtained using a scanning electron microscope. Results showed that the average thickness, tensile strength and elongation at break of leather were all improved after retanning. Retanning by HPU-DAPs can effectively increase flame retardancy of final leather. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of hyperbranched polyurethand retanning agent (HPU) - Synthesis of hyperbranched polyurethane with flammability (HPU-DAP) - Retanning technology - Measurements
- RESULTS AND DISCUSSION : Structure characterization - Application of FWPRA in retanning process - Flammability of retanned leather
- Table 1 : Retanning process
- Table 2 : GPC data, hydroxyl value as well as particle size of HPU and HPU-DPAs
- Table 3 : Ts, average thickness and mechanical properties of leather
- Table 4 : Main parameters from cone calorimeter test and vertical burning testDOI : https://doi.org/10.34314/jalca.v117i10.6184 En ligne : https://drive.google.com/file/d/1O_C0E7Ge3HR5Vt5IaW1eJee-K5ioerbX/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38230
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVII, N° 10 (10/2022) . - p. 441-447[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23652 - Périodique Bibliothèque principale Documentaires Disponible Impact of various Mg(OH)2 morphologies on hydrophobicity, mechanical, and physical properties of polyurethane nanocomposite / Zahra Rajabimashhadi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 6 (11/2023)
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Titre : Impact of various Mg(OH)2 morphologies on hydrophobicity, mechanical, and physical properties of polyurethane nanocomposite Type de document : texte imprimé Auteurs : Zahra Rajabimashhadi, Auteur ; Rahim Naghizadeh, Auteur ; Ashkan Zolriasatein, Auteur ; Sonia Bagheri, Auteur ; Claudio Mele, Auteur ; Carola Espositio Corcione, Auteur Année de publication : 2023 Article en page(s) : p. 1815-1834 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Dureté (matériaux)
Hydrophobie
Hydroxyde de magnésiumL'hydroxyde de magnésium est un composé inorganique de formule Mg(OH)2. Ce sel se présente sous la forme d'une poudre pratiquement insoluble dans l'eau. Le « lait de magnésie » est une solution saturée d'hydroxyde de magnésium, d'aspect laiteux. Sa forme minérale naturelle est connue sous le nom de brucite.
L'hydroxyde de magnésium est utilisé en thérapeutique comme antiacide (pour calmer les brûlures d'estomac) et comme laxatif.
Matériaux hybrides
Polyuréthanes
Revêtements organiques
Revêtements poudreIndex. décimale : 667.9 Revêtements et enduits Résumé : Polyurethane (PU) is one of the best polymer coatings due to its wide range of advantages such as easy fabrication, lightness, non-toxicity, durability, adhesion, flexibility, and strength. However, some of its drawbacks make it a suitable choice for the manufacturing of nanocomposites to enhance its properties. Hydrophobicity and flame retardancy are two of the most crucial characteristics of a polymer nanocoating. Magnesium hydroxide (MH), with its ability to be produced in a multitude of morphologies and exceptional properties, especially in flame retardancy, has always attracted the interest of researchers. One of the best methods for synthesizing high-purity, controlled-size, and controlled-shape nanoparticles is the hydrothermal technique. In this paper, magnesium chloride and sodium hydroxide were utilized as raw materials to synthesize four different morphologies of MH, such as plate, flake, spherical, and disk, functionalized using 3-Aminopropyl triethoxysilane (APTES). In the following, PU nanocomposites were fabricated by drop casting method including 3 % w.t. of different synthesized MH. The influence of each morphology on different properties of PU/Mg(OH) was then investigated using different analyses such as spectroscopy, mechanical, and hydrophobicity tests. The observations indicated that different surface topography would result from the presence of nanoparticles with various morphologies on the nanocomposite’s surface. Extremely high water contact angles were attained as a result of the surface roughness, revealing the super hydrophobic behavior of the produced nanocoatings. Also, the presence of MH in PU matrix improved the mechanical properties of the nanocomposite, depending on the aspect ratio and particle size.: Note de contenu : - EXPERIMENTAL METHODS AND MATERIALS : Nano-MH synthesis - PU/Mg(OH)2 fabrication - Characterization
- RESULTS AND DISCUSSION : Nano-MH powder characterization - PU/Mg(OH)2 nanocomposite
- Table 1 : Materials used for MH synthesis
- Table 2 : Materials used for PU/Mg(OH)2 fabrication
- Table 3 : The chemical information of the PU/Mg(OH)2 nanocomposites
- Table 4 : Synthesiszed MH powder propertiesDOI : https://doi.org/10.1007/s11998-023-00797-0 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00797-0.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40163
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 6 (11/2023) . - p. 1815-1834[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24337 - Périodique Bibliothèque principale Documentaires Disponible Important isocyanates for coatings / Peter Mischke in EUROPEAN COATINGS JOURNAL (ECJ), N° 3/00 (03/2000)
PermalinkImproved corrosion resistance based on APTES-grafted reduced sulfonated graphene/waterborne polyurethane coatings / Jian Luo in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 5 (09/2018)
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PermalinkImproved dispensing for solar inverters / Christian Ostermeier in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 20, N° 8 (08/2013)
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PermalinkImproved durability through reactive dispersant technology / Steffen Onclin in COATINGS TECH, Vol. 15, N° 7 (07/2018)
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PermalinkImproved properties with reactive polyurethanes / Christian Hopmann in KUNSTSTOFFE INTERNATIONAL, Vol. 104, N° 7 (07/2014)
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PermalinkImproved protection for outdoor furniture / Philippe Deligny in EUROPEAN COATINGS JOURNAL (ECJ), N° 6 (06/2013)
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PermalinkImprovement in the scratch resistance of polymers by roller burnishing process / K. O. Low in INTERNATIONAL POLYMER PROCESSING, Vol. XXV, N° 3 (07/2010)
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PermalinkImproving adhesive performance / Jörg-Ulrich Zilles in ADHESION - ADHESIVES + SEALANTS, N° 1/2010 (2010)
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PermalinkImproving fungal decay resistance of solvent and waterborne polyurethane-coated wood by free and microencapsulated thyme essential oil / Seyed Mahmoud Miri Tari in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 3 (05/2022)
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PermalinkPermalinkImproving hydrophobicity on polyurethane-based synthetic leather through plasma polymerization for easy care effect / Burcak Karaguzel Kayaoglu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 4 (07/2013)
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PermalinkImproving polyurethane surface coatings, Part 1 / Adrian Thomas in SURFACE COATINGS INTERNATIONAL, Vol. 98.4 (09/2015)
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PermalinkImproving polyurethane surface coatings. Part 2 : use of oxazolidines and aldimines / Adrian Thomas in SURFACE COATINGS INTERNATIONAL, Vol. 98.5 (10-11/2015)
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PermalinkImproving the performance of biobased polyurethane dispersion by the incorporation of photo-crosslinkable coumarin / Lorena German-Ayuso in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 5 (09/2023)
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PermalinkImproving the performance of protective water-based coatings / Ian Martin in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 209, N° 4654 (09/2019)
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