Elementary study of IR reflectance properties of organic and inorganic pigment formulation / K. K. Gupta in PAINTINDIA, Vol. LIV, N° 4 (04/2004)

[article]  inPAINTINDIA > Vol. LIV, N° 4 (04/2004) . - p. 45-60 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 pigments Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12006 [article]

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Non absorbent coatings based on polyester polyurethane for protection against chloroethylsulphide / T. C. Shami in PAINTINDIA, Vol. LVIII, N° 10 (10/2008)

[article]  inPAINTINDIA > Vol. LVIII, N° 10 (10/2008) . - p. 83-90 Titre : Non absorbent coatings based on polyester polyurethane for protection against chloroethylsulphide Type de document : texte imprimé Auteurs : T. C. Shami, Auteur ; G. N. Mathur, Auteur ; M. Srivastava, Auteur Année de publication : 2008 Article en page(s) : p. 83-90 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Polyesters Polyuréthanes Revêtements Revêtements:Peinture Tags : Polyurethane  Polyesterpolyol  Chloroethylsulphide  Hexamethylene  diisocyanate  Trimethylol  propane  Paints  Coatings Index. décimale : 667.9 Revêtements et enduits Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7045 [article]

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Polymeric and inorganic microspheres and ther applications. / Rama Dubey in PAINTINDIA, Vol. LIII, N° 8 (08/2003)

[article]  inPAINTINDIA > Vol. LIII, N° 8 (08/2003) . - p. 63-66 Titre : Polymeric and inorganic microspheres and ther applications. Type de document : texte imprimé Auteurs : Rama Dubey, Auteur ; D. Lal, Auteur ; G. N. Mathur, Auteur Année de publication : 2003 Article en page(s) : p. 63-66 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : Recently hollow spheres of nanometer to micrometer dimensions called microspheres form a new and important class of shape fabricated materials. The most important advantage with microspheres is that its shell can be constructed from a variety of materials of valuable scientific interest and technological importance. These include magnetic, semiconducting, ceramic, metallic, biomolecular, polymeric and composite materials. As a result microspheres find wide application in chemistry, physics, biology, medicine and other science disciplines, as controlled release capsules (drugs, dyes, cosmetics and inks), artificial cells, catalysts, fillers, supports, abrasives, ball point pen tips, composites, thermal insulation, electrical circuit boards, chromatography, shock absorbing armour plate, gas or chemical storage and in electromagnetic (EM) wave absorbing coatings. Note de contenu : - What are microspheres - Applications and advantages - Obstacles still to overcome Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12168 [article]

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Studies on the effect of polyurethane finishing on the physico-mechanical properties of leather / Rajesh Kumar in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. N° 71 (Année 1987)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. N° 71 (Année 1987) . - p. 147-152 Titre : Studies on the effect of polyurethane finishing on the physico-mechanical properties of leather Type de document : texte imprimé Auteurs : Rajesh Kumar, Auteur ; G. N. Mathur, Auteur Année de publication : 1987 Article en page(s) : p. 147-152 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Cuirs et peaux -- Finition Cuirs et peaux -- Propriétés chimiques Cuirs et peaux -- Propriétés mécaniques Cuirs et peaux -- Propriétés physiques Essais de résilience Essais dynamiques Revêtements organiques Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : This paper deals with the techniques for preparation of a single-component polyurethane coating based on castor oil and its application for finishing of leather. Various physical properties were measured to assess the quality of finished leather after coating it with the polyurethane composition. Optical and scanning electron microscopy studies were undertaken to investigate the compatibility of polyurethane coating with leather. Note de contenu : - Preparation of castor oil-based polyurethane - Characterisation of polyurethane coating - Physical properties measurement - Table 1 : Tensile properties of polyurethane-coated and uncoated leather - Table 2 : Abrasion resistance of polyurethane-coated and uncoated leather - Table 3 : Flexing endurance values of polyurethane coated and uncoated leather - Table 4 : Rub fastness data of polyurethane coated and uncoated leather - Table 5 : Water penetration, water absorption and water vapour permeability of polyurethane-coated and uncoated leather - Table 6 : Chemical resistance properties of polyurethane-coated and uncoated leather - Table 7 : Scuff resistance of polyurethane-coated and uncoated leather En ligne : https://drive.google.com/file/d/1HfitjCrZFBKDK5jtF_-J8x9EnNPRWGTf/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40129 [article]

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