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Development of emulsions for coalescing solvent free glossy emulsion paint / C. A. Samant in PAINTINDIA, Vol. LIII, N° 2 (02/2003)

[article]  inPAINTINDIA > Vol. LIII, N° 2 (02/2003) . - p. 31-44 Titre : Development of emulsions for coalescing solvent free glossy emulsion paint Type de document : texte imprimé Auteurs : C. A. Samant, Auteur ; K. Krishnaraj, Auteur Année de publication : 2003 Article en page(s) : p. 31-44 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : The utilization of emulsion using Core-shell technique for zero VOC coatings and the use of crosslinkers to obtain desired performance are the two main advances in water borne technology that are of increasing interest to coating formulators. A high glass-transition temperature (Tg) acrylic emulsion with less minimum film forming temperature (MFFT) of 10°C, which is much less than its Tg was designed by a novel approach of Core-Shell technique using two different crosslinking monomers e.g. Gamma methacryloxypropyltrimethoxy silane in Shell and Trimethylol propane triacrylate in Core and evaluated in a glossy emulsion paint formulation. A high quality glossy emulsion paint, free from coalescing solvents and suitable for ambient temperature applications was successfully prepared using the developed emulsion. Note de contenu : - Experimentation - Preparation of monomer pre-emulsion - Emulsion processing - Selection of monomer composition for emulsion suitable for glossy paint - Preparation of glossy emulsion paint - Discussions - Approach of core-shell - Core-shell technique - Preparation of emulsion using core shell technique - Preparation of paint - Result and discussions Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12075 [article]

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Microbial biosorbents : A new approach towards removal and recovery of heavy metals / Ameet A. Ahuja in PAINTINDIA, Vol. LIII, N° 2 (02/2003)

[article]  inPAINTINDIA > Vol. LIII, N° 2 (02/2003) . - p. 45-50 Titre : Microbial biosorbents : A new approach towards removal and recovery of heavy metals Type de document : texte imprimé Auteurs : Ameet A. Ahuja, Auteur ; Vishal H. Gandhi, Auteur Année de publication : 2003 Article en page(s) : p. 45-50 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : The contamination of water bodies with toxic substances like heavy metals has posed challenges for the industry. Heavy metals pollutants are of great environmental concern as they are non-degradable and therefore remains persistent in the environment. Since heavy metals are a non renewable, finite natural resource the challenge is not limited only to their removal from the water strams but also to finding efficient and economical ways of recovery and recycling one of the major sources of heavy metal pollution are electroplating, pigment producing, metal finishing, printed circuit board manufacturing, etc. When such waste water emanating from industries are released into rivers or other natural water bodies, they prove to be harmful to the flora and fauna due to the presence of metals like lead, cadmium, chromium, copper, zinc, silver, etc. While passing along the food chain, these metals get bioaccumulated in small aquatic organisms and finally reach humans by the process of biomagnfication. Toxicity data for various metallic pollutants is shown. Note de contenu : - Advantages of biosorption over conventional methods of metal removal - Mechanism of metal removal by microorganisms - Ideal biosorbents - Desorption and reuse of biosorbents - Metal biosorption technologies - Factors affecting metal biosorption - Technological aspects of biosorption process - Economics of biosorption process - Status and future biosorbent technology Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12076 [article]

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The fundamental principles of cationic UV-curable coating / Madhu Bajpai in PAINTINDIA, Vol. LIII, N° 2 (02/2003)

[article]  inPAINTINDIA > Vol. LIII, N° 2 (02/2003) . - p. 51-54 Titre : The fundamental principles of cationic UV-curable coating Type de document : texte imprimé Auteurs : Madhu Bajpai, Auteur ; Vipin Shukla, Auteur Année de publication : 2003 Article en page(s) : p. 51-54 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : UV-coatings are formulated with 100% reactive liquid vehicles such as oligomers, monomers, photoinitiator and additives. If we are relating free radical-initiated polymerisations to photo-induced ionic reactions, the later process has some advantages over former, like ionic-polymerisation can be used to cure saturated monomers of the epoxide, cyclic ether, sulphide, acetal, lactone, as well as vinyl type monomers. The advantage of curing saturated monomer such as epoxy resin over the unsaturated types is that the former have only a small volatility, goodflow, (owing to lowrheological characteristics) no significant colour, negligible toxicity and superb physical and chemical properties. Note de contenu : - Photoinitiators - Comparison with radical polymerisation Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12078 [article]

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