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Titre : Hidden changes in the mix : Density differences reveal interaction in 2K PUR water-borne formulation Type de document : texte imprimé Auteurs : Frederic Lucas, Auteur ; Jules Mikhael, Auteur ; Ulrich Tromsdorf, Auteur Année de publication : 2017 Article en page(s) : p. 36-41 Langues : Anglais (eng) Catégories : Chimie analytique
Dispersions et suspensions
Durée de vie en pot
Polyacrylates
Polyuréthanes
Revêtements bi-composant:Peinture bi-composant
Revêtements en phase aqueuse:Peinture en phase aqueuse
Ultracentrifugation en gradient de densitéIndex. décimale : 667.9 Revêtements et enduits Résumé : Two-component water-borne polyurethane coatings can undergo a wide range of reactions during drying and curing. differences in reactions after mixing the components were identified by densigy gradient ultracentrifugation (DGU) some correlations with pot life were established. Note de contenu : - Different reaction pathways after mixing components
- How density gradient ultracentrifugation operates
- What DGU can and cannot determine
- Initial tests sho occurrence of different reactions
- Influence of variables in the polyacrylate dispersion
- Hydrophilic component affect polyisocyanate response
- Some correlations found with pot life variation
- Initial results of the techniques summarised
- FIGURES : 1. Possible scenarios when formulating 2K PUR components - 2. Density gradient ultracentrifugation technique - 3. DGU results - case study with OH dispersion A - DGU results - case study with OD dispersion B - 5. DGU results - influence of the dispersion - 6. DGU results - influence of the type of polyisocyanate
- Table : Pot life of 2K water-borne PUR formulationsEn ligne : https://drive.google.com/file/d/1O_5NRmnY9qgUXC_k0HksXUmc5fT61ipW/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29413
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 11 (11/2017) . - p. 36-41[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19369 - Périodique Bibliothèque principale Documentaires Disponible High performance polyurethane coatings through nanoparticle- modified raw materials / Arno Nennemann in DOUBLE LIAISON, N° 573 (03/2010)
[article]
Titre : High performance polyurethane coatings through nanoparticle- modified raw materials Type de document : texte imprimé Auteurs : Arno Nennemann, Auteur ; Robert Maleika, Auteur Année de publication : 2010 Article en page(s) : p. 26-31 Note générale : Bibliogr. Langues : Français (fre) Catégories : Anticorrosion
Dispersions et suspensions
Nanoparticules
Polyacrylates
Polyisocyanates
Polymères en émulsion
Polyols
Polyuréthanes
Revêtements en phase aqueuse:Peinture en phase aqueuseIndex. décimale : 667.9 Revêtements et enduits Résumé : A technology platform was developed crating a new class of nano-modified coating raw materials. For the first time polyisocyanates as well as polyacrylate polyole dispersions containing nanoparticles could be developed, yielding coatings with excellent optical properties concerning gloss and haze without compromising polymer- intrinsic properties like appearance and elasticity. The essential step in this new technology was the specific, chemical modification of the coating raw materials which polyol dispersions on the other hand. Handling was identical to standard raw materials and formulations were easy to use with existing application technology. High scratch resistance in 2K solvent and waterborne clear coat applications at loadings of 10 to 15 % silica in the film could be achieved. Additionally, the corrosion protection properties in pigmented 2K waterborne hydroprimers and topcoats could strongly be improved. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8752
in DOUBLE LIAISON > N° 573 (03/2010) . - p. 26-31[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012031 - Périodique Bibliothèque principale Documentaires Disponible High-performance waterborne UV-curable polyurethane dispersion based on thiol–acrylate/thiol–epoxy hybrid networks / Vikash Mishra in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 5 (09/2017)
[article]
Titre : High-performance waterborne UV-curable polyurethane dispersion based on thiol–acrylate/thiol–epoxy hybrid networks Type de document : texte imprimé Auteurs : Vikash Mishra, Auteur ; Jatin Desai, Auteur ; Kalpesh I. Patel, Auteur Année de publication : 2017 Article en page(s) : p. 1069-1081 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Epoxydes
Polyacrylates
Revêtements -- Propriétés chimiques
Revêtements -- Propriétés mécaniques
Revêtements -- Propriétés thermiques
Revêtements en phase aqueuse -- Séchage sous rayonnement ultraviolet
ThiolsIndex. décimale : 667.9 Revêtements et enduits Résumé : Synthesis, characterization, and film performance of waterborne thiol–acrylate/thiol–epoxy hybrid coatings are highlighted in this article. A dimer acid-modified epoxy (DME) polyol, containing both hydroxyl and epoxy functional groups, was prepared by reacting epoxy resin (EEW = 190 g/equi) with dimer fatty acid at 2:1 molar ratio. Further, a base UV-curable polyurethane acrylate dispersion (UV-PUD), with a pendant epoxy functional group, was prepared by reacting polyol (DME), isophorone diisocyanate, and dimethylol propionic acid and end-capped with hydroxyethyl methacrylate with subsequent dispersion in water. Prepared intermediates were characterized for the parameters relevant to the study by physical, spectroscopic, and chemical methods. UV-curable thiol–acrylate/thiol–epoxy hybrid coatings were prepared by blending UV-PUD with trimethylolpropane tris(3-mercaptopropionate) (TMPMP) at four different thiol ratios (0, 0.3, 0.6, and 1.0) with respect to acrylate/epoxy groups. Cured films of the hybrid coating were identified by FTIR spectroscopy. The impact of thiol ratio on film performance was evaluated in terms of mechanical, chemical, thermal, and coating properties. The gel content measurements confirm that the addition of TMPMP increased the double bond conversion along with the epoxy group. Evaluation of cured samples shows the significant improvement in storage modulus, glass transition temperature, tensile strength, and hardness with increase in thiol ratio. The cured films possessed excellent water and acid resistance (<4%) even after 28 days of immersion. Moreover, the notable improvement was alkali resistance of cured films, i.e., as thiol ratio was increased from 0 to 1, weight loss in alkaline environment deceased from 49.5 to 4.5% after 28 days. Better properties of the thiol–acrylate/thiol–epoxy hybrid films will allow it as a potential application in low-volatile high-performance coatings. Note de contenu : - EXPERIMENTAL : Materials - Preparation of dimer-modified epoxy polyol (DME) - Synthesis of hybrid UV-curable polyurethane dispersion (UV-PUD) - Preparation of hybrid UV-curable coatings and their cured films - Measurements
- RESULTS AND DISCUSSION : Physicochemical characterization of DME and UV-PUD - FTIR analysis of intermediates and cured film - Dynamic mechanical properties of thiol-acrylate/thiol-epoxy hybrid networks - Mechanical properties of the hybrid systems - Thermal stability of cured films - Gel fraction - Chemical, water, and solvent resistance - Coating performance propertiesDOI : 10.1007/s11998-016-9906-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9906-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29142
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 14, N° 5 (09/2017) . - p. 1069-1081[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19230 - Périodique Bibliothèque principale Documentaires Disponible High strength silane terminated polyethers / Luc Peeters in DOUBLE LIAISON, N° 605 (06/2015)
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Titre : High strength silane terminated polyethers Type de document : texte imprimé Auteurs : Luc Peeters, Auteur Année de publication : 2015 Article en page(s) : p. 14-17 Langues : Français (fre) Catégories : Adhésifs structuraux
Formulation (Génie chimique)
Polyacrylates
Polyéthers
Polymères à silane modifiéIndex. décimale : 668.9 Polymères Résumé : Silane terminated polyethers (STPEs) were already introduced on the market around 40 years ago. The first commercial product, Kaneka MS PolymerTM, was launched in 1978 in Japan, mainly for use in low modulus, elastic, construction sealants. Since the introduction of the first polymers continuously new STPE with improved or new properties were developed. Note de contenu : - To give some milestones
- High strength MS polymer
- Comparison with standard STPE
- Formulation example
- Improved properties with high strength polymers
- Figures : 1. Schematic comparison of the different polymer technologies - 2. Comparison of the different Kaneka MS polymer types in a general purpose sealant - 3. Lap shear strength on different plastics in plastic adhesive model formulation
- TABLES : 1. Overview of the properties of the different acryl modified high strength MS polymers - 2. Model formulation and properties of DIY repair adhesive - 3. Model formulation and properties of (semi-)structural adhesive - 4. Weatherability and elastic recovery properties of the high strength polymersPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24373
in DOUBLE LIAISON > N° 605 (06/2015) . - p. 14-17[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17339 - Périodique Bibliothèque principale Documentaires Disponible 17382 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : How fast do acrylates cure ? : The spectroscopic analysis of percent cure in UV-curable acrylate adhesives and relation of surface tack to light exposure intensity Type de document : texte imprimé Auteurs : Ken Dake, Auteur Année de publication : 2002 Article en page(s) : p. 26-29 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésifs -- Séchage sous rayonnement ultraviolet
Fourier, Spectroscopie infrarouge à transformée de
Polyacrylates
Polyuréthanes
Réflexion totale atténuéeIndex. décimale : 668.3 Adhésifs et produits semblables Résumé : UV-curable urethane acrylate adhesives will cure in less than 1 second when exposed to UV light with intensity greater than 1 W/cm^2. This curing process may be monitored by measuring the conversion of acrylate double bonds via spectroscopic analysis. Transmission FTIR will measure the conversion throughout the entire sample while an attenuated total reflectance (ATR) method will allow for measurement at a particular point or surface. Acrylate adhesives also exhibit a surface tack in the presence of oxygen in the air. One way to prevent inhibition is to cure the adhesive within a closed system (no exposed surface air) or blanket the reaction with nitrogen. A high-intensity light causing a rapid cure will also minimize the amount of surface tack. En ligne : https://drive.google.com/file/d/14rgkvQxQG9g85Powy38fQeaoiTu2BY7g/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20003
in ADHESIVES AGE > Vol. 45, N° 5 (05/2002) . - p. 26-29[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001471 - Périodique Bibliothèque principale Documentaires Disponible Hybrid organic/inorganic coatings produced using a dual-cure mechanism / Jie He in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 4 (07/2012)
PermalinkPermalinkHydrophobic cellulose - Micro-fine texture at ultra-strong performance for a measurable soft-focus effect / Johanna Schulte in SOFW JOURNAL, Vol. 147, N° 5 (05/2021)
PermalinkImprovements in the application properties of water-based low VOC coatings / Tom Annable in SURFACE COATINGS INTERNATIONAL, Vol. 81, N° 7 (07/1998)
PermalinkInfinite possibilities in ADHESIVE TECHNOLOGY, Vol. 18, N° 3 (09/2001)
PermalinkInfluence of alcohols on stability and mechanical properties of polyacrylate coating material / Dangge Gao in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 6 (11/2015)
PermalinkInfluence of different dispersants on the quality and stability of aqueous quinacridone magenta pigment dispersion for ink-jet applications / Rafal Gaida in COLORATION TECHNOLOGY, Vol. 139, N° 6 (12/2023)
PermalinkInfluence of hydrophobic side chain structure on the performance of amphiphilic acrylate copolymers in leather making / Jinxia Du in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 100, N° 2 (03-04/2016)
PermalinkInfluence of pigment addition on the properties of polymer films for leather finishing / Cristiana Winter in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 2 (03-04/2017)
PermalinkInfluences of silicone emulsion on fire protection of waterborne intumescent fire-resistive coating / Ying Dong in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 2 (03/2014)
PermalinkInitiators for high-solids polyacrylates resins : selection guidelines and performance review / Ginger G. Myers in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 67, N° 841 (02/1995)
PermalinkInterfacial studies of crosslinked polyurethanes ; Part I. quantitative and structural aspects of crosslinked near film-air and film-substrate interfaces in solvent-borne polyurethanes / Anneke M. Kaminski in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 69, N° 872 (09/1997)
PermalinkKinetics and effect of surfactant and cosurfactant on miniemulsion polymerization of acrylate monomers / Hongqiang Li in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 6 (11/2014)
PermalinkPermalinkModern 2K PU waterborne / Robert Reyer in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 203, N° 4580 (01/2013)
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