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Dendritic oligomers - an innovative class of UV-curable materials / Detlef Burgard in SURFACE COATINGS INTERNATIONAL, Vol. 99.1 (02-03/2016)
[article]
Titre : Dendritic oligomers - an innovative class of UV-curable materials Type de document : texte imprimé Auteurs : Detlef Burgard, Auteur Année de publication : 2016 Article en page(s) : p. 33-35 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Oligomères
Polymères -- Propriétés mécaniques
Polymères dendritiques
Revêtements -- Séchage sous rayonnement ultraviolet:Peinture -- Séchage sous rayonnement ultraviolet
Rhéologie
ViscositéIndex. décimale : 667.9 Revêtements et enduits Résumé : UV curing is a fast curing process in which high intensity ultraviolet light is used to create a photochemical reaction that instantly cures inks, adhesives and coatings. UV curing is adaptable to printing, coating, decorating, stereolithography and for the assembly of a variety of products and materials, owing to some of its key attributes. These include : a low-temperature process, a high speed process, and a potentially solvent-free process. Curing is by polymerisation rather than by evaporation. Originally introduced in the 1960s, this technology has streamlined and increased automation in many industries in the manufacturing sector. Note de contenu : - Dendritics - What are they ?
- Dendritics in UV-cured coatings
- TABLES : 1. A comparison of different types of coatings shows the advantages of radiation-cured coatings at a glance - 2. Mechanical properties of dendritic oligomers compared to a 6-functional non-dendritic oligomer
- FIGURES : 1. Model of an 18-functional dendritic oligomer. Acrylate functions are shown in red - 2. Viscosity of the 6-functional dendritic oligomer BDT-1006 as function of dilution with different reactive diluents (measured at 25°C, CAP-2000+) - 3. Viscosity of fomulations with different oligomersEn ligne : https://drive.google.com/file/d/1cMJ4fNDGaDwNkqBtzTv08kULwgHFPcA2/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25661
in SURFACE COATINGS INTERNATIONAL > Vol. 99.1 (02-03/2016) . - p. 33-35[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17898 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Doubly green : New bio-based coatings offer a solution to current resource and environmental problems Type de document : texte imprimé Auteurs : Michael Shen, Auteur ; Tianxiang Chen, Auteur ; Guiyou Wang, Auteur Année de publication : 2022 Article en page(s) : p. 34-38 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Biomatériaux
Biopolymères
Caractérisation
Copolymère uréthane acrylate
Diluants
Oligomères
Polymères -- Propriétés thermiques
Revêtements -- Propriétés mécaniques
Revêtements -- Séchage sous rayonnement ultraviolet
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : UV-curable polyurethane (PU) coatings for wooden and metallic surfaces are highly efficient and environmentally friendly. However, a key raw material is mostly obtained from petroleum, a resource which is environmentally problematic and limited in its availability. Bio-based UV-curable PU coatings offer a way out of this dilemma. Note de contenu : - Experimental
- Synthesis of reactive diluents
- Solvent-free polyurethane acrylates
- Preparation of the UV-cured coatings
- Characterisation
- Key considerations for successful PUA synthesis
- Thermal properties of the UV-cured PUA oligomers
- Physical properties of the UV-cured films
- Crystalline structure imparts good swelling resistance to UV-cured films
- Ester-groups structure confers good thermal stability on UV-cured PUA fims
- Special chemical structure imbues UV-cured PUA films with good mechanical properties
- Coating properties of the UV-cured PUA films
- Table 1 : DMA results, mechanical properties and water absorption of the UV-cured films
- Table 2 : Coating properties of the UV-cured coatingsEn ligne : https://drive.google.com/file/d/1R7M4-6QI3gyr3ZuIiJVAEUr-GSbJitvf/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38354
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 11 (11/2022) . - p. 34-38[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23710 - Périodique Bibliothèque principale Documentaires Disponible Dual-curable coatings obtained from multi-functional non-isocyanate polyurethane oligomers / H. R. Asemani in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 5 (09/2022)
[article]
Titre : Dual-curable coatings obtained from multi-functional non-isocyanate polyurethane oligomers Type de document : texte imprimé Auteurs : H. R. Asemani, Auteur ; V. Mannari, Auteur Année de publication : 2022 Article en page(s) : p. 1393-1407 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Décomposition (chimie)
Dureté (matériaux)
Impédancemétrie
Matériaux -- Propriétés fonctionnelles
Oligomères
Poids moléculaires
Polyuréthanes
Réticulation à l'humidité
Revêtements -- Propriétés mécaniques
Revêtements organiques
Revêtements sans isocyanates
Temps de séchageIndex. décimale : 667.9 Revêtements et enduits Résumé : The growing concerns and impending regulations on the usage of monomeric isocyanates in the production of polyurethane resins have led to the introduction of alternative non-isocyanate polyurethane (NIPU) systems. Although two-component NIPU coatings based on the reaction of cyclic carbonates and aliphatic amines have emerged as a promising option, they are still associated with two significant drawbacks: lower crosslinking densities due to reduced functionality of the oligomers and low ambient-temperature reactivity. This study reports the utilization of a hybrid approach to address these drawbacks. Amine-functional NIPU oligomers (NI-PUPA) were synthesized by the reaction of cycloaliphatic amine functional compounds and multi-functional cyclic carbonates in an excess amine molar ratio. After mixing the NI-PUPAs with (3-glycidyloxypropyl) trimethoxysilane (GPTMS), a dual-curable coating could be achieved by ambient curing of amines and epoxies and moisture curing of alkoxy silanes. A comparative experimental design was implemented to evaluate the effect of an additional curing mechanism. The results revealed that the additional moisture curing led to faster ambient curing, faster development of properties, enhanced flexibility even at higher crosslinking densities, and better corrosion resistance. Such advancement could facilitate the future implementation of NIPUs in high-performance ambient-curing coating applications. Note de contenu : - EXPERIMENTAL : Materials - Methods - Testing, characterization, and evaluation
- RESULTS AND DISCUSSION : Characterization of NI-PUPAs - Curing characterization - Cured film properties
- Table 1 : Molecular weights obtained from GPC analysis in comparison with theoretical values and the values obtained by amine value titration
Table 2 : The tack-free and through-dry times of NIPU coatings based on ASTM D5898 standard
- Table 3 :Konig pendulum hardness development for NIPU coatings over 7 days of curing time (method: ASTM D4366; unit: number of oscillations)
- Table 4 :MEK double-rub development for NIPU coatings over 7 days of curing time
- Table 5 :Properties of NIPU coatings after 7 days of curing at ambient conditions
- Table 6 :Impedance at low frequencies and pore resistance values obtained from EIS analysis
- Table 7 : Decomposition temperatures and residual wt.% obtained by the analysis of TGA thermogramsDOI : https://doi.org/10.1007/s11998-022-00614-0 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00614-0.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38278
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 5 (09/2022) . - p. 1393-1407[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23672 - Périodique Bibliothèque principale Documentaires Disponible Effect of the particle sizes of silica on the properties of UV-curing matting coatings / Ziyuan Yang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 1 (01/2021)
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Titre : Effect of the particle sizes of silica on the properties of UV-curing matting coatings Type de document : texte imprimé Auteurs : Ziyuan Yang, Auteur ; Guozhang Ma, Auteur ; Caiying Hou, Auteur ; Yanxia Niu, Auteur ; Huafeng Duan, Auteur ; Xiaogang Hao, Auteur Année de publication : 2021 Article en page(s) : p. 183-192 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Agent mattant
Analyse morphologique
Caractérisation
Copolymère uréthane acrylate
Diisocyanate d'isophorone
Dioxyde de silicium
Oligomères
Polyméthacrylate d'hydroxyéthyle
Polypropylène glycol
Revêtements -- Propriétés mécaniques
Revêtements -- Séchage sous rayonnement ultraviolet
Revêtements organiques
SiliceLa silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux.
La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...).
Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale.
Stabilité thermique
Taille des particulesIndex. décimale : 667.9 Revêtements et enduits Résumé : UV-curable matting composites were prepared by micron silica matting agent, polyether diol (PPG), isophorone diisocyanate (IPDI), and 2-hydroxyethyl methacrylate (HEMA) via the in situ polymerization method. The structure, surface morphology, and thermal stability of the composites were characterized by FTIR, SEM, and TGA, respectively. As the main resin in the UV-curable coating, the effects of particle sizes of silica on the gloss, abrasion resistance, adhesion, and hydrophilic properties of coatings were measured. The results show that the agglomeration phenomenon of the modified silica in the composite coating was obviously improved. The smaller the particle size, the lower the gloss of coatings with the same content. The adhesion strength and abrasion resistance of the composites were superior to those of pure UV-curing coatings without silica. The greater the particle sizes of the added modified silica, the stronger the hydrophilicity of the composite. Note de contenu : - EXPERIMENTAL : Material - Preparation of PUA and PUA/Sio2 oligomer - Preparation of UV-curing matting coating with PUA/Sio2 oligomer - Instrument and characterization
- RESULTS AND DISCUSSION : The structure UV-PUA/Sio2 oligomer - The thermal stability of UV-PUA/SiO2 composite films - Effect of particle size of silica on the surface property of UV-cured films - Effec of particle size of silica on the mechanical property of UV-cured filmsDOI : https://doi.org/10.1007/s11998-020-00395-4 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00395-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35362
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 1 (01/2021) . - p. 183-192[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22605 - Périodique Bibliothèque principale Documentaires Disponible Electron beam curing - Emerging platform for wood coatings / Yogesh B. More in PAINTINDIA, Vol. LXX, N° 3 (03/2020)
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Titre : Electron beam curing - Emerging platform for wood coatings Type de document : texte imprimé Auteurs : Yogesh B. More, Auteur Année de publication : 2020 Article en page(s) : p. 74-80 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bois -- Revêtements protecteurs
Monomères
Oligomères
Photoamorceurs (chimie)
Revêtements -- Séchage sous rayonnement électronique
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Wood coatings are used to protect and decorate wooden substrate. The real beauty of these coatings is that they are available in various types of chemistries-whether it is acid curing, one component polyurethane, two component polyurethane, water-based or recently developed ultraviolet curing (UV). Several reviews have been published on these chemistries and discussed. But what is the next chemistry for wood coating is a million dollar question and yes, there is an answer to it. The chemistry which probably fits into this answer is Electron Beam curing (EB). UV curable chemistries always depend on a photoinitiator molecule to catalyze the polymerization process. When the photointiator is excited by a UV light, it releases the energy needed for the diluents to react. EB curing systems deliver energy directly to the polymer in the form of energetic electrons. EB curable chemistries are almost identical to UV curable, but EB coatings do not require a photointiator. Whi le UV curing is highly dependent on the efficiency of the photoinitiator, EB curing does not require any special additives or catalysts. According to studies, electron is subatomic particle with negative charge and plays an essential role in numerous physical phenomena, such as electricity, magnetism, chemistry and thermal conductivity. The same source of electrons is used to cure the coatings in case of Electron Beam technology with minimal extractable from coating. This review article reveals about the mechanism of EB coatings, compositions of EB coatings, future possibilities of EB coatings on wood and additional benefits in near future. Note de contenu : - INTRODUCTION : EB curing mechanism - Energy transfer - Depth of penetration - Absorbed dose - D = K xI/V - Beam uniformity - Throughput
- ELECTRON BEAM WOOD COATINGS : EB curable compositions - Monomers - Additives
- FUTURE POSSIBILITIES OF ELECTRON BEAM WOOD COATINGS
- Fig. 1 : Electromagnetic spectrum
- Fig. 2 : Typical diagram of EB curing technique
- Fig. 3 : Range of penetration with different accelerating voltage 13µm titanium foil and 20 mm of nitrogen
- Fig. 4 : Reaction mechanism of EB curing process
- Fig. 5 : Penetration thickness for UV and EB technology
- Table 1 : Densities of various species of wood
En ligne : https://drive.google.com/file/d/1FIEA3Gxzpxz-5OTBR7dJ1j5Ztc7HwGHH/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34654
in PAINTINDIA > Vol. LXX, N° 3 (03/2020) . - p. 74-80[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22358 - Périodique Bibliothèque principale Documentaires Disponible Electron beam-curing laminating adhesives / Michael Gould in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 17, N° 8 (08/2010)
PermalinkEnhancing curing of UV black coating through formulation efficiency / Pradeep S. Verma in PAINTINDIA, Vol. LXX, N° 2 (02/2020)
PermalinkEpoxysilane oligomer for protective coatings / Christopher M. Byrne in COATINGS TECH, Vol. 7, N° 10 (10/2010)
PermalinkEtude d'oligodiènes dihydroxylés hydrogénés et des polyuréthannes correspondants / Yves Camberlin / 1980
PermalinkEtude d'oligomères et de pléionomères du polytéréphtalate de glycol / René Pénisson / 1967
PermalinkFacile preparation of fluoroalkyl end-capped vinyltrimethoxysilane oligomer/a, w-dihydroxy-terminated poly(dimethylsiloxane) composite rubber : application to effective removal of fluorinated aromatic compound from aqueous methanol solution by fluoroalkylated silicone composite rubber / Katsumi Yamashita in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 1 (01/2021)
PermalinkFacile synthesis of a cardanol-based levelling agent as a biodegradable alternative to tristyrylphenol ethoxylates for the dyeing of polyester fabric / Kun Chen in COLORATION TECHNOLOGY, Vol. 138, N° 3 (06/2022)
PermalinkPermalinkFormulating strategies for low migration and low odour products / Susan E. Bailey in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 204, N° 4602 (11/2014)
PermalinkFormulating to good effect / Philippe de Groote in EUROPEAN COATINGS JOURNAL (ECJ), N° 4/2011 (04/2011)
PermalinkFormulation and optimization of radiation-curable nonisocyanate polyurethane wood coatings by mixture experimental design / Forough Zareanshahraki in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 3 (05/2021)
PermalinkGlycolytic depolymerization of PET waste using MP-diol and utilization of recycled product for UV-curable wood coating / Vandana Jamdar in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 2 (03/2018)
PermalinkGreening radiation curing / Hugues van den Bergen in EUROPEAN COATINGS JOURNAL (ECJ), N° 9 (09/2015)
PermalinkHigh-solids nonaqueous dispersion coatings based on crystalline oligoesters / Ganghui Teng in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 66, N° 829 (02/1994)
PermalinkHydrolytic stability of ternary and quaternary urethane end-capped oligoesters / Mark D. Soucek in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 4 (07/2019)
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