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PAINTINDIA . Vol. LIV, N° 4Mention de date : 04/2004Paru le : 15/04/2004 |
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Ajouter le résultat dans votre panierElementary study of IR reflectance properties of organic and inorganic pigment formulation / K. K. Gupta in PAINTINDIA, Vol. LIV, N° 4 (04/2004)
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Titre : Elementary study of IR reflectance properties of organic and inorganic pigment formulation Type de document : texte imprimé Auteurs : K. K. Gupta, Auteur ; G. N. Mathur, Auteur ; V. S. Tripathi, Auteur Année de publication : 2004 Article en page(s) : p. 45-60 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : Each of the earthen object wether it is a part of nature or made by man has its specific reflectance profile not only in visual part but in other parts of electromagnetic spectrum also. This is the characteristic fingerprint of the object. This has given birth to various kinds of sensor/detectors working in specific band of spectrum. The phenomenon of vision lies on the contrast of object to immediate surrounding. No contrast no vision is formed. For camouflaging point of view, it needs to simulate the reflectance profile of objects with the immediate surrounding. The most common sensor available with the service are telescope, binoculars, night vision devices, IR photographic, film, IR cameras and thermal imagery systems etc. working in 800-1200nm and 3-5 µm wave length band. For matching the reflectance of the military objects/equipments/troops, they need coating or painting of pigment formulation to be applied directly on surface of equipment or in the form of textile covering systems which might simulate visual and IR reflectance properties. All the military objects i.e. vehicles, tanks or other artilleries and troops need to be camouflaged to hide from adversary. Presently, the army is equipped with various types of detecting sensors other than conventional binoculars and telescope working in visual band of electromagnetic regions only (350-750nm). Therefore, a vibrand need arises to study the reflectance properties of each part ofnature in entire range of electromagnetic radiation ranging i.e. from 350-1200nm. To protect the object against visual detection (400-750nm) and NIR (750-1200nm) region of electromagnetic spectrum, it needs to blend the object with surrounding in term of reflectance in these wave length bands. Note de contenu : - LITERATURE SURVEY : Organic and inorganic pigments - Optical behaviour of pigments - Near infrared
- OBJECTIVE OF PIGMENT FORMULATION : Study of NIR properties of natural objects (pigments details - binder used) - Study and evaluation - Study and observation of single pigment - Study of formulation using two pigments - Study of pigment formulations using three pigments - Study of the combination of four pigments.
- RESULTS AND DISCUSSIONS : 1) Formulations using single pigments - 2) Formulations using two pigments - 3) Formulations using three pigments - 4) Formulation using four pigmentsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12006
in PAINTINDIA > Vol. LIV, N° 4 (04/2004) . - p. 45-60[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 000452 - Périodique Bibliothèque principale Documentaires Disponible Oleochemical polyols for polyurethane coatings / Arjun Sen in PAINTINDIA, Vol. LIV, N° 4 (04/2004)
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Titre : Oleochemical polyols for polyurethane coatings Type de document : texte imprimé Auteurs : Arjun Sen, Auteur Année de publication : 2004 Article en page(s) : p. 61-70 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : The development of polyurethane coatings is probably a never-ending story. In many of today's high performance coatings applications, polyurethanes are the systems of choice owing to their unique combination of flexibility and high chemical and mechanical resistance. Of any coatings system, polyurethanes offer the widest range of possible properties. Demands on the quality of coatings are rising constantly, where improved performances are boeing sought. This is particularly true in automotive and wood applications. On the other hand,the relatively high costs of polyurethane coatings remain an issue. THey have to be justified by their performance. Due to VOC issues, a further emphasis is currently under development of waterorne and solvent-free polyurethane systems on the one hand, and on finding new curing mechanisms on the other. In the recent past, intensive research has been carried out and still is, to improve both polyurethane raw materials and formulations. Note de contenu : - Oils and fats as oleochemical raw materials
- How are oleochemical polyols synthesized?
- Dimer diols based on dimer acid
- Polyols based on epoxides
- Oleochemical polyols-application range
- Solvent-free 2K floor coatingsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12007
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Code-barres Cote Support Localisation Section Disponibilité 000452 - Périodique Bibliothèque principale Documentaires Disponible Metal catalysis of isocyanate-hydroxyl reaction / Amitabha Ray Chaudhuri in PAINTINDIA, Vol. LIV, N° 4 (04/2004)
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Titre : Metal catalysis of isocyanate-hydroxyl reaction Type de document : texte imprimé Auteurs : Amitabha Ray Chaudhuri, Auteur Année de publication : 2004 Article en page(s) : p. 71-82 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : This article is a brief review of the metal catalysis in the field of polyurethane coatings. It generally covers the mechanism, kinetics and application of the metal catalysts developed so far. Organometallic tin compounds have served the industry for a long time as metal catalysts. Keeping in mind the environmental concern great emphasis has been given on the latest development of the non-tin metal catalysts - their advantages and short comings. A review on the trouble shooting has also been included keeping in view the application prospects.
This paper consists several pictorial views to strengthen the facts and observations, which are the pillars of further developments.Note de contenu : - Catalysis of isocyanate-hydroxyl reaction
- Mechanism and kinetics of isocyanate-hydroxyl reaction
- Kinetics of catalyzed isocyanate-hydroxyl reaction
- Selection of catalysts
- Factors to consider when selecting a catalyst
- Catalyst selectivity
- Applications of catalysts in different coating systems
- Blocked isocyanate (One package) systems
- Waterborne polyurethane systems
- Troubleshooting with metal catalysts
- Catalyst deactivation
- Coating quality problems related to catalystsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12008
in PAINTINDIA > Vol. LIV, N° 4 (04/2004) . - p. 71-82[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 000452 - Périodique Bibliothèque principale Documentaires Disponible Scratch resistance of UV coatings : influence of chemistry / Stefan Smeets in PAINTINDIA, Vol. LIV, N° 4 (04/2004)
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Titre : Scratch resistance of UV coatings : influence of chemistry Type de document : texte imprimé Auteurs : Stefan Smeets, Auteur ; Indrajit Bhattacharya, Auteur ; Tania Lermytte, Auteur Année de publication : 2004 Article en page(s) : p. 85-94 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : Organic coatings are very susceptible towards contact with hard objects, i.e. they are subject to maring and scratching. Scratched surfaces are not only less decorative and because of that have less value, but their protective effect is reduced too. Scractches are wek points where the system is open to attack. Corrosion can begin there, or if the substrate is deformed the coating will tear or even release from the substrate. Note de contenu : - Resins
- Erichsen pen tester
- Dilution of EB 600 with 50 % of different monomers
- Influence of photoinitiator
- Influence of EB P115
- Influence of concentration of different photoinitiators
- UV-curing under nitrogen
- Taber-Haze testPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12009
in PAINTINDIA > Vol. LIV, N° 4 (04/2004) . - p. 85-94[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 000452 - Périodique Bibliothèque principale Documentaires Disponible
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Code-barres | Cote | Support | Localisation | Section | Disponibilité |
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000452 | - | Périodique | Bibliothèque principale | Documentaires | Disponible |