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High surface area nanocrystalline titania through thermal hydrolysis of titanyl sulphate solution / Ahmed Yasir Vakayil in PAINTINDIA, Vol. LIV, N° 8 (08/2004)

[article]  inPAINTINDIA > Vol. LIV, N° 8 (08/2004) . - p. 53-60 Titre : High surface area nanocrystalline titania through thermal hydrolysis of titanyl sulphate solution Type de document : texte imprimé Auteurs : Ahmed Yasir Vakayil, Auteur ; P. N. Mohan Das, Auteur Année de publication : 2004 Article en page(s) : p. 53-60 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : Titania exists in three polymorphs, vis. anatase, brookite and rutile. Among these, rutile is thermodynamically most stable, while anatase and brookite are meta stable, readily get converted to rutile on calcination at higher temperature. Brookite phase is very rarely formed under ordinary conditions ; hence it has no commercial significance. But, anatase and rutile are most highly discussed in material science and profoundly important from industrial point of view, particularly pigment industry TiO2 has been using as a pgiment from the very beginning of 20th century. Anatase is more preferred in primers and interior paints, while rutile in exterior ones. However, in some exterior white house paints and latex house paints, both anatase and rutile are used. They are also used in some specialty paints and coatings, like synthetic rubber roof coating, splash zone coating, hear resistant primers, etc. Note de contenu : - Chemical analysis - Surface area studies - XRD studies - TGA and DTA studies Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12050 [article]

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Hyperbranched polymers as a novel class of pigment dispersants / F. O. H. Pirrung in PAINTINDIA, Vol. LIV, N° 8 (08/2004)

[article]  inPAINTINDIA > Vol. LIV, N° 8 (08/2004) . - p. 63-68 Titre : Hyperbranched polymers as a novel class of pigment dispersants Type de document : texte imprimé Auteurs : F. O. H. Pirrung, Auteur ; E. M. Loen, Auteur ; A. Noordam, Auteur Année de publication : 2004 Article en page(s) : p. 63-68 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : Hyperbranched polymers form a novel class of materials that are employed as components of resin formulations. They are appreciated for their low intrinsic viscosities, which is ascribed to their spherical shape. It was envisaged to devise pigment dispersants with hyperbranched moieties as structural elements. Commercially available hyperbranched polymers with polyester, polyesteramide and polyethylene imine backbones were chemically modified to develop a range of disperants with core- and shell-type pigment anchoring mechanisms. Both the shell- and core-type anchoring principles generally can be used for pigment dispersion and stabilisation at a low viscosity level. Note de contenu : - Hyperbranched polymers - Dispersing agents - Concept based on Dendrimeric polyesters (PES) - Concept based on hyperbranched polyesteramides (PEA) - Concept based on hyperbranched polyethylene imines (PEI) Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12051 [article]

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New developments in coatings additives : part- II / B. K Ashwini in PAINTINDIA, Vol. LIV, N° 8 (08/2004)

[article]  inPAINTINDIA > Vol. LIV, N° 8 (08/2004) . - p. 69-86 Titre : New developments in coatings additives : part- II Type de document : texte imprimé Auteurs : B. K Ashwini, Auteur ; Rajan Bodkhe, Auteur ; Sharmishtha Chakravarti, Auteur ; Arvind Chavan, Auteur ; Sagar Gade, Auteur ; Hariharan Subramanyam, Auteur ; Mahesh Makde, Auteur ; Rhishikesh Kulkarni, Auteur ; Kishor Namaye, Auteur ; Tejaswini Kale, Auteur ; Jaishree Rane, Auteur ; Rohan Prakash Vaidya, Auteur ; Anand Sadekar, Auteur ; V. C. Malshe, Auteur Année de publication : 2004 Article en page(s) : p. 69-86 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Note de contenu : - Non-halogenated flame retardant (Fr) additive : Limitations of fire retardant additive - Reactive diluents - Solvent soluble colours - Suspension agents: - Cellulosics - associative thickeners - organoclays - Transparent iron oxide yellow - Properties (MAR) : Provision of color with transparency and coloring effect - UV absorption protection - Reduction in coloring cost - Drawbacks - Water based aluminium paste : Need for the product - Hightly reactive aluminium pigments - Suitable techniques (Additive technologies (WIS) - Passivated technology (DAV) - Encapsulation technique (WIS,DAV) Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12052 [article]

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Benefits of using synthetic aluminium silicate extenders in architecture coatings and other application fields / Peter Stroh in PAINTINDIA, Vol. LIV, N° 8 (08/2004)

[article]  inPAINTINDIA > Vol. LIV, N° 8 (08/2004) . - p. 87-92 Titre : Benefits of using synthetic aluminium silicate extenders in architecture coatings and other application fields Type de document : texte imprimé Auteurs : Peter Stroh, Auteur Année de publication : 2004 Article en page(s) : p. 87-92 Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12053 [article]

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An accelerated test procedure for the evaluation of acid-etch resistance of coatings / George D. Vaughn in PAINTINDIA, Vol. LIV, N° 8 (08/2004)

[article]  inPAINTINDIA > Vol. LIV, N° 8 (08/2004) . - p. 93-96 Titre : An accelerated test procedure for the evaluation of acid-etch resistance of coatings Type de document : texte imprimé Auteurs : George D. Vaughn, Auteur ; James B. Downie, Auteur ; Patricia E. Ferrell, Auteur Année de publication : 2004 Article en page(s) : p. 93-96 Note générale : bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : Acid etch, or environmental etch, is a defect that can occur in any exterior paint finish. However, it is a major concern for the automotive industry. The result of acid etch may appear as rings on a car's finish. These rings may seem like water spots, but in actuality, damage has been done to the finish, so washing does not remove the rings. Certain geographical areas are affected more than others - areas adjacent to heavily industrialized cities usually have high incidents of acid etch complaints. Historically, isocyanate-crosslinked coatings outperformed melamine-crosslinked coatings for acid-etch resistance. However, melamine-crosslinked coatings are still in use because they are more cost effective and have better mar resistance. This article details an accelerated acid-etch test. A similar test has been mentioned by Gregorovich and Hazan. They compared the acid-etch test to actual Jacksonville test date. It has been the automotive industry that has primarily studied and tried to eliminate this paint defect. This relatively simple test yields a pair of values, the minimum spot temperature (MST) and the scaled acid value. THese values are used to rank the severity of the acid damage to a coating. The test procedure uses a BYK-Gardner gradient oven. In addition, steel panels (4"X22.5"x0.032") are required (these are the standard size panels used in the gradient oven). To make the comparison of coatings in this brief study easier, one acrylic polyol and either an isocyanate resin or a melamine resin were used as the crosslinker. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12054 [article]

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Dynamic fingerprints of inks using surface tension measurement / Victor P. Janule in PAINTINDIA, Vol. LIV, N° 8 (08/2004)

[article]  inPAINTINDIA > Vol. LIV, N° 8 (08/2004) . - p. 97-104 Titre : Dynamic fingerprints of inks using surface tension measurement Type de document : texte imprimé Auteurs : Victor P. Janule, Auteur Année de publication : 2004 Article en page(s) : p. 97-104 Note générale : bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : A unique dynamic fingerprint of any ink formulation can be generated in terms of surface tension versus surface age, from zero time to several minutes, using a differential maximum bubble bubble pressure technique. This allows formulators and users to characterize ink performance under all possible conditions before the ink is used.When multiple surfactants are used, the unique surface tension fingerprint may not be a "classical" dynamic curve, as different surfactants diffuse to the interface at different rates, resulting in a more complexe dynamic curve with several peaks and valleys. In some cases, the lowest surface tension formulation may not be the best one to use, because it can cause other problems. Note de contenu : - The molecular dynamic surface tension fingerprint - The importance of dynamic surface tension in ink formulations - Formulation changes - Surfactants - Dynamic surface tension measurement - Classical dynamic surface tension curves - Dynamic Critical Micelle Concentration (CMC) - Complex fingerprints Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12055 [article]

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