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The path to greater resistance / Abhishek Srivastava in EUROPEAN COATINGS JOURNAL (ECJ), N° 6 (06/2018)
[article]
Titre : The path to greater resistance : Effect of reactive diluents on UV-curable wood coating properties Type de document : texte imprimé Auteurs : Abhishek Srivastava, Auteur Année de publication : 2018 Article en page(s) : p. 26-32 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bois -- Revêtements
Brillance (optique)
Copolymère uréthane acrylate
Diluants
Essais dynamiques
Formulation (Génie chimique)
Mesure
Polyesters
Polymères -- Synthèse
Polyols
Polyuréthanes
Résistance à l'abrasion
Revêtements -- Propriétés chimiques
Revêtements -- Propriétés mécaniques
Revêtements -- Séchage sous rayonnement ultravioletIndex. décimale : 667.9 Revêtements et enduits Résumé : UV-curable polyurethane acrylate wood coatings were studied with the aim of enhancing protective and decorative properties. Adding reactive diluents may improve coating hardness, ease of application as well as resistance to abrasion and chemicals but it is a delicate balance. Incorporating too much of the diluents can cause micro-distortions on the surface, and brittleness - impairing gloss and scratch resistance. Note de contenu : - Experimental : Polyester polyol synthesis - Urethane acrylate synthesis - Polyurethane acrylate synthesis - Measurements - Preparation of coating samples - UV curing of samples - PU-acrylate resin analysis shows low molecular weight - Reactive diluents improve coating resistance - Scratch hardness
- Abrasion resistance
- Gloss at 60° angle
- Pencil hardness
- Cross hatch hardness
- Hydrocarbon chain in hdda results in better chemical resistance
- Excellent stain resistance
- Correct balance of reactive diluents enhances performance
- FIGURES : 1. Acid value of polyester polyol - 2. Hydroxyl value of a) polyester polyol and b) PU acrylate resin - 3. IR spectrum of the PU-acrylate resin - 4. Molecular weight of PU-acrylate resin
- TABLES : 1. Formulation of coating samples - 2. Viscosity and refractive index of coating samples - 3. IR spectrum of the PU-acrylate resin
En ligne : https://drive.google.com/file/d/1Bm5rZ9Ypm6YgAwLm2o53LpPBzIv1YWf9/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30721
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 6 (06/2018) . - p. 26-32[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20010 - Périodique Bibliothèque principale Documentaires Disponible The preparation and characterization of abrasion-resistant coatings on polycarbonate / Yu-Hong Chen in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 1 (01/2013)
[article]
Titre : The preparation and characterization of abrasion-resistant coatings on polycarbonate Type de document : texte imprimé Auteurs : Yu-Hong Chen, Auteur ; Li-Xiang Liu, Auteur ; Mao-Sheng Zhan, Auteur Année de publication : 2013 Article en page(s) : p. 79-86 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion
Caractérisation
Dureté (matériaux)
Méthyltriméthoxysilane
Polycarbonates
Résistance à l'abrasion
Revêtements
Sol-gel, ProcédéIndex. décimale : 667.9 Revêtements et enduits Résumé : A series of abrasion-resistant coatings based on methyltrimethoxysilane (MTMS), tetraethoxysilane (TEOS), and methacyloxypropyltrimethoxysilane (MEMO) were synthesized via a sol–gel method and applied to polycarbonate (PC) substrate. Through a comparison with an uncoated PC substrate, hardness, adhesion, and abrasion resistance of coated PC substrates were investigated. Fourier transform infrared (FTIR) spectra of these coatings before and after being cured indicated that the crosslinked structure of Si–O–Si was formed via the hydrolysis–condensation reactions of alkoxy silane. The optical test results showed that coated PC substrates possessed higher transmittance and lower haze than uncoated PC substrates. The hardness and adhesion data demonstrated that PC substrates coated with the hybrid coatings (MTMS/TEOS/MEMO coatings) possessed the greatest hardness and optimal adhesion. After 500 wear cycles, the PC substrate with MTMS/TEOS/MEMO coatings showed some grooves and wear tracks without any spallation or delamination, and there was a decrease of only 1.0–1.3% in transmittance and an increase of only 5.68–7.44% in haze. Whereas uncoated PC substrate and substrates with MTMS and MTMS/TEOS (molar ratio is 1.5:1) coatings exhibited a decrease of 3.3, 3.9, and 2.4% in transmittance and an increase of 30.19, 17.42, and 12.35% in haze, respectively. Note de contenu : - EXPERIMENTAL : Materials - Preparation of coating solutions - Preparation of coatings on PC substrates - Characterization
- RESULTS AND DISCUSSION : The properties of MTMS/TEOS coatings (The chemical structure - The optical properties - The hardness and adhesion - The abrasion resistance) - The properties of MTMS/TEOS/MEMO coatings (The optical properties - The hardness and adhesion - The abrasion resistance - Morphological observations of M and MTM-1.0 before and after being worn)DOI : 10.1007/s11998-012-9430-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9430-x.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17475
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 1 (01/2013) . - p. 79-86[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14636 - Périodique Bibliothèque principale Documentaires Disponible 15124 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : The right mix : Interpenetrating silicone-polyurethane-epoxy networks for improved solventless anticorrosive primers Type de document : texte imprimé Auteurs : A. Anand Prabu, Auteur ; M. Alagar, Auteur Année de publication : 2004 Article en page(s) : p. 59-62 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adhésion
Anticorrosifs
Anticorrosion
Epoxydes
Polyamines
Polyuréthanes
Primaire (revêtement)
Réseaux polymères
Résistance à l'abrasion
Revêtements -- Additifs
Revêtements -- Propriétés mécaniques
SiliconesLes silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki).
Traction (mécanique)
ZincIndex. décimale : 667.9 Revêtements et enduits Résumé : Intercrosslinking networks of silicone modified polyurethane-epoxy resins, cured with an aromatic polyamine adduct and polyamidoamine, lead to solvent-free coatings with an exceptional combination of good adhesion, high tensile strength, abrasion and chemical resistance, in particular upon curing with polyamine. Addition of zinc powder further improves abrasion and corrosion resistance. Note de contenu : - Status of IPN coatings
- Polyurethanes and siloxanes as epoxy modifiers
- Materials
- Formulation of the PU-modified epoxy primer
- Formulation of the silicone modified PU-epoxy primer
- Substrate preparation
- Coatings evaluation studies
- Improved physico-mechanical and chemical behaviour
- Addition of zinc exhibited maximum corrosion protection
- Polyamines cure betterEn ligne : https://drive.google.com/file/d/1-kGI7DsZOK_AOgbVTZiiRRWmZR-Pose0/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24206
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 1-2/2004 (01-02/2004) . - p. 59-62[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 000668 - Périodique Bibliothèque principale Documentaires Disponible The study of colour fastness of commercial microencapsulated photoresponsive dye applied on cotton, cotton/polyester and polyester fabric using a pad-dry-cure process / Mateja Kert in COLORATION TECHNOLOGY, Vol. 133, N° 6 (12/2017)
[article]
Titre : The study of colour fastness of commercial microencapsulated photoresponsive dye applied on cotton, cotton/polyester and polyester fabric using a pad-dry-cure process Type de document : texte imprimé Auteurs : Mateja Kert, Auteur ; Marija Gorjanc, Auteur Année de publication : 2017 Article en page(s) : p. 491-497 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants photochromiques
Colorimétrie
CotonLe coton est une fibre végétale qui entoure les graines des cotonniers "véritables"(Gossypium sp.), un arbuste de la famille des Malvacées. Cette fibre est généralement transformée en fil qui est tissé pour fabriquer des tissus. Le coton est la plus importante des fibres naturelles produites dans le monde. Depuis le XIXe siècle, il constitue, grâce aux progrès de l'industrialisation et de l'agronomie, la première fibre textile du monde (près de la moitié de la consommation mondiale de fibres textiles).
Encapsulation
Microcapsules
Photostabilité
Polyesters
Résistance à l'abrasion
Résistance au lavage
Solidité de la couleur
Teinture -- Fibres textilesIndex. décimale : 667.3 Teinture et impression des tissus Résumé : Commercial microencapsulated photoresponsive dye was applied on cotton, polyester/cotton and polyester fabric using a pad-dry-cure process. Colour fastness of the photoresponsive fabrics to washing, wet cleaning, dry cleaning, rubbing and light was investigated. The CIELAB colour values of the fabrics before and after testing were measured using a reflectance spectrophotometer, and the colour differences were calculated to evaluate the fastness properties. The fabrics had better colour fastness to wet cleaning and washing than to dry cleaning. The fabrics showed higher colour fastness to wet than to dry rubbing. The photoresponsiveness of the fabrics decreased with prolonged exposure time to artificial light due to low photostability of the microcapsules. Note de contenu : - Fabrics - Coating of photochromic microcapsules into the textile
- Colour measurements
- Colour fastness to washing
- Colour fastness to wet and dry cleaning
- Colour fastness to rubbing
- Colour fastness to lightDOI : 10.1111/cote.12297 En ligne : https://drive.google.com/file/d/17qm79txEqEJnF7lNTUCI1CFopSiJPf6k/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29496
in COLORATION TECHNOLOGY > Vol. 133, N° 6 (12/2017) . - p. 491-497[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19395 - Périodique Bibliothèque principale Documentaires Disponible The use of engineered silica to enhance coatings / Jim Reader in COATINGS TECH, Vol. 17, N° 6 (06/2020)
[article]
Titre : The use of engineered silica to enhance coatings Type de document : texte imprimé Auteurs : Jim Reader, Auteur ; Maria Nargiello, Auteur Année de publication : 2020 Article en page(s) : p. 36-45 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Brillance (optique) -- Mesure
Charges (matériaux)
Déperlance
Dispersions et suspensions
Fluidisation
Formation de film
Imperméabilisation
Matériaux amorphes
Mouillabilité
Résistance à l'abrasion
Rhéologie
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.
ViscositéIndex. décimale : 667.9 Revêtements et enduits Résumé : The field of coatings technology has utilized many forms of silica-based particles in the last 70 years. This large, varied class of fillers is generically broken into two categories of crystalline and amorphous morphology. With ongoing scrutiny and sensitivity in the coatings industry to move towards less hazards in the workplace, greater emphasis is placed on suitable amorphous technology to replace crystalline silica technology. Amorphous silica is highly adaptable and flexible to be modified in both powder and pre-dispersed forms, and numerous engineered types of technologies have been developed to provide functional solutions to many coatings problems.
Amorphous silica technology has been developed to address functionalities including: rheological control, suspension of pigments and fillers, and reinforcement of coatings film; to impart scratch resistance, hydrophobicity / anti-corrosion benefits, and oleophobicity; as a carrier of trace actives into coatings for homogenous distribution; for flow control, charge, and fluidization enhancement of powdered coatings; and gloss reduction of liquid systems. Particle technology and modification will be addressed along with performance attributes highlighted for each of the types of tailor-made modifications. The importance of proper dispersion and homogenous distribution within a coating matrix will be reviewed.
This article will address how amorphous silica technology is differentiated and engineered to create specially tailored solutions to enhance the performance of coatings and will highlight the latest technical developments in this field.Note de contenu : - Rheology and film formation
- Anti-corrosion/water repellency
- Scratch resistance
- Free flow, fluidization, transfer efficiency
- Gloss control
- Recent developments in silica technology
- Fig. 1 : The silica family tree
- Fig. 2 : Production of pyrogenic (fumed) silica
- Fig. 3 : Primary, secondary, and tertiary structures of fumed silicas
- Fig. 4 : Methanol wettability of differently treated fumed silicas
- Fig. 5 : Thickening efficiency of fumed silica as a function of surface treatment
- Fig. 6 : Improved film formation with fumed silica dispersions
- Fig. 7 : Improved corrosion resistance with hydrohobically treated fumed silica ; coatings based on published guide formulations from Halox
- Fig. 8 : Structure modification of fumed silica and scratch resistance
- Fig. 9 : Homogeneous distribution of silica through a polymer matrix
- Fig. 10 : Improved scratch resistance results in a high-soilds, 2K polyurethane clear coat based on Macrymal SM 510n60LG and Vestanat HB 2640MX
- Fig. 11 : Transfer efficiency and Faraday cage effects
- Fig. 12 : Fluidization efficiency
- Fig. 13 & 14 : Measuring gloss with a reflectometer (DIN EN ISO 2813)
- Fig. 15 : SEM images of a new spherical precipitated silica particles
- Fig. 16 : Viscosity "jump curves" for waterbased silica dispersions
- Table 1 : Comparison of characteristics of different synthetic silicas
- Table 2 : Common surface treatments for fumed silicasEn ligne : https://drive.google.com/file/d/17TVd7hca18xX6Tv0Yq4-_5oKHwAWTdO8/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34358
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