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Oleochemicals for coating industries / Mahua Gosh in PAINTINDIA, Vol. LI, N° 4 (04/2001)

[article]  inPAINTINDIA > Vol. LI, N° 4 (04/2001) . - p. 37-42 Titre : Oleochemicals for coating industries Type de document : texte imprimé Auteurs : Mahua Gosh, Auteur Année de publication : 2001 Article en page(s) : p. 37-42 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Matériau  revêtement'  Peinture  Liant  'Acide  gras'  'Alcool  Glycérol  'Corps  'Article  synthèse' Index. décimale : 667.9 Revêtements et enduits Résumé : - Processes for oleochemical production : - Fat splitting – Alcoholysis – Esterification – Oxidation – Epoxidation and hydroxylation – Amidation – Dehydration – Dimerisation – Ethoxylation – Alkyds from oleochemicals – Isomerisation – Modification of phospholipids – Genetic engineering Note de contenu : Oleochemicals include various intermediates and derivatives, such as fatty acids, fatty alcohols, glycerine, etc., and a vast array of products which are used in different industries for various applications. This review article is prepared to gather the techno-commercial aspects of oleochemicals giving special stress on the sources, world trends, as well as future of oleochemicals in coating industries. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12576 [article]

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Interpenetrating polymer networks for coatings : properties, characterization, applications and current status / T. Amandaraj in PAINTINDIA, Vol. LI, N° 4 (04/2001)

[article]  inPAINTINDIA > Vol. LI, N° 4 (04/2001) . - p. 43-54 Titre : Interpenetrating polymer networks for coatings : properties, characterization, applications and current status Type de document : texte imprimé Auteurs : T. Amandaraj, Auteur ; P. S. Mohan, Auteur ; Smt. Krishnan, Auteur ; M. Raghavan, Auteur Année de publication : 2001 Article en page(s) : p. 43-54 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Formulation (Génie chimique) Liants Réseaux polymères Revêtements:Peinture Index. décimale : 667.9 Revêtements et enduits Résumé : As the protective mechanism of an organic coating is largely dependent on its polymer used as binder, blending of polymers has long been practised to improve end use properties. Polymer alloys, in particular interpenetrating polymer networks [IPNs], offer a variety of improved coating properties. IPNs represent a mode of blending of two or more polymers to produce a mixture in which the phase separation is not as extensive as in polymer blends. The combination of varied chemical types of polymeric networks in different proportions, often resulting in different controlled morphologies, has produced IPNs with synergistic behavior. The physical properties of the IPNs fall into two classes : the first class contains those properties, which vary monotonously as the composition is varied from one pure network to the other. The second class of properties includes those which at least in certain IPNs can exhibit maxima or minima at an intermediate composition between the two networks. IPNs offer a broad range of applications including protective coatings. IPN technology has surprisingly covered almost all sorts of applications and, in the coatings areas also, quite a good number of commercial products based on full, semi- and pseudo-IPNs are already available in the market, although they are rarely identified as such. In this paper, the noteworthy IPNs so far published have been cited. Note de contenu : - Polymer blends and alloys - Interpenetrating polymer networks : - Formation of IPNs – Topological isomerism of IPNs – Synergic behavior of IPNs - Morphology of IPNs - Glass transition behavior of IPNs - Physical properties of IPNs - Characterization of IPNs : - Morphology by electron microscopy – Thermal measurements – Mechanical properties – Kinetic measurements of IPN formation – Barrier properties of IPNs – Chemical and corrosion resistance properties of IPNs – Solvent resistance properties of IPNs – Visco-elastic measurements of IPNs – Electrical properties of IPNs – Infra-red [IR] and Fourier Transform Infra-red [FT-IR] spectroscopy – Gel permeation chromatography – Density and wettability - Application of IPNs : - IPNs as leather coatings – IPNs as dental fillings – IPNs as sheet-moulding compounds [SMCs] – IPNs as noise and vibration damping materials – IPNs as rimplast thermoplastic resins – IPNs as automobile parts - Current status Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12577 [article]

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Environmental pollution and its abatement by paint industry / Ashish Ahuja in PAINTINDIA, Vol. LI, N° 4 (04/2001)

[article]  inPAINTINDIA > Vol. LI, N° 4 (04/2001) . - p. 55-66 Titre : Environmental pollution and its abatement by paint industry Type de document : texte imprimé Auteurs : Ashish Ahuja, Auteur ; Pramod Kumar, Auteur ; S. Chandra, Auteur Année de publication : 2001 Article en page(s) : p. 55-66 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Industrie  peinture  vernis'  'Pollution  air'  'Prévention  pollution'  'Composé  organique  volatil'  Solvant  Peinturage  automobile'  'Epuration  effluent  gazeux' Index. décimale : 667.9 Revêtements et enduits Résumé : It is a paradox of the day that almost every development accompanies degradation of nature. In the quest for wealth and comfort, man has ignored natural laws and thus has disturbed a number of natural cycles, resulting in environmental pollution and health hazards. Environmental degradation is linked with industrialization. Surface coating industries, being a specific case of raw material intensive industries use a large number of ingredients, whose harmful effect on man and environment are not spelt out in unambiguous terms. To maintain the ecological balance, adequate steps are being taken now to reduce the huge amount of emission of volatile organic compounds (VOC), used as solvents/ thinners by paint industries, which, otherwise, can pollute the neighboring environment significantly. In the present paper, control on VOC content using different methods has been discussed. Adoption of new coating technologies such as water borne coatings, high solids coatings, powder coatings, radiation curable coatings and electrodeposition coatings reduces the VOC emission to a great extent. Therefore, these coatings along with their limitations have been discussed precisely. Automotive paintshops apply huge quantities of paint, and hence they have a greater environmental impact. Assessment of the harmful effects of paintshop operations and the ways to overcome these effects has also been discussed specifically in this article. Note de contenu : - What is VOC? : Damages caused by VOC - VOC determination - VOCs from coatings and coating industries - Legislation on solvent emissions - Methods of controlling environmental pollution : - Incineration – Thermal incineration – Catalytic incineration – Adsorption – Reduction in the amount of painting – Reduction of waste by flocculation or ultrafiltration – Condensation – Use of supercritical fluids – Improving transfer efficiency – Eco-friendly paint removal systems – Adsorption – Membrane gas separation – Biological treatment - Modern coating technologies to control environmental pollution : Water-borne coatings – High solids coatings – Powder coatings – Radiation curable coatings – UV (Ultraviolet) cured coatings – EB (electron beam) cured coatings – Electrodeposition coatings - Environmental impact of automobile paintshop operations : Phosphate pretreatment – Electropainting – Top coat application – Paint stoving – Good housekeeping Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12578 [article]

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