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Studies on characterization of high performance coatings based on polymer alloys of interpenetrating polymer networks / T. Anandaraj in PAINTINDIA, Vol. LI, N° 6 (06/2001)

[article]  inPAINTINDIA > Vol. LI, N° 6 (06/2001) . - p. 35-52 Titre : Studies on characterization of high performance coatings based on polymer alloys of interpenetrating polymer networks Type de document : texte imprimé Auteurs : T. Anandaraj, Auteur ; P. S. Mohan, Auteur ; Sm Krishnan, Auteur ; Kalpana Balakrishnan, Auteur ; M. Raghavan, Auteur Année de publication : 2001 Article en page(s) : p. 35-52 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse thermique Anticorrosion Caractérisation Chromatographie sur gel Epoxydes Fourier, Spectroscopie infrarouge à transformée de Liants Microscopie électronique à balayage Polyacrylates Polyuréthanes Réseaux polymères Revêtements protecteurs Revêtements:Peinture Spectrométrie infrarouge Spectroscopie d'impédance électrochimique Index. décimale : 667.9 Revêtements et enduits Résumé : Organic coatings are valued after the polymeric binder material out of which it is made for the reason that it only decides the extent of protection and the life of a coating. Of a few ways to obtain better performing polymeric binders, alloying the incompatible polymers through compatibilization is fast-emerging with a number of promises. Interpenetrating polymer networks are one of its kinds. In this study, two polymer alloys of Interpenetrating Polymer Network (IPN) based on epoxy-acrylic-polyurethane polymers have been developed in the laboratory and subjected to different laboratory accelerated tests as pigmented coatings. They have been found to possess far superior physical and chemical and corrosion resistance properties compared to crosslinked acrylates, polyamide cured epoxies and polyurethanes. The IPNs as clear coatings were also characterized by various physico-chemical and surface analytical techniques. The thermo-analytical techniques, FTIR and SEM confirmed the formation of IPN. The improved corrosion resistance properties were established by water permeation tests and electrochemical impedance spectroscopy. Note de contenu : - Synthesis of epoxy-acrylate precursors - Synthesis of IPNs - Neat systems - Crosslinked acrylic copolymer system - Polyamide catalyzed epoxy system - Acrylic polyol based aromatic polyurethane system - Nomenclature of coatings - Specimen preparation - Free-filming of IPNs - Characterization methods : FT-IR spectroscopy – Gel permeation chromatography – Scanning electron microscopy – Thermal measurements – Gel-time measurements – Moisture vapor transmission rate measurements – Electrochemical AC Impedance spectroscopy (EIS) - FT-IR spectra - Gel permeation chromatograms - Thermal measurements - Morphology of IPNs by SEM - Get-time measurements - Moisture-vapor transmission rates - Electrochemical AC impedance spectroscopy Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12590 [article]

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Emerging role of the paint industry in improving human health / Melrina Mascarenhas in PAINTINDIA, Vol. LI, N° 6 (06/2001)

[article]  inPAINTINDIA > Vol. LI, N° 6 (06/2001) . - p. 53-57 Titre : Emerging role of the paint industry in improving human health Type de document : texte imprimé Auteurs : Melrina Mascarenhas, Auteur Année de publication : 2001 Article en page(s) : p. 53-57 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Matériau  revêtement'  Peinture  'Santé  publique'  Hygiène  Antimicrobien  'Revêtement  sol'  Hôpital  Insecticide  'Lutte  antipollution  air'  Pesticide Index. décimale : 667.9 Revêtements et enduits Résumé : For years the paint industry has been regarded as a polluting industry, with a negative effect on human health. However increasingly, research is being conducted to find ways to utilize coatings to give it an added value benefit of being hygienic in addition to its protective and decorative functions. Hygiene coatings that have anti-microbial properties, find use in a wide variety of applications including hospital paints, floor coatings, air-duct coatings, etc. These coatings have potential for various consumer and commercial applications which include hospitals, food process environments, pharmaceutical industries, public areas as well as private homes. Besides hygiene coatings, there are other paints that contribute positively to human health conditions. These include insecticidal paints, anti-allergenic paints and air-purifying paints. Thus the paint industry has evolved to meet human health requirements by providing products that can improve standards of hygiene in our daily living and working environments. Note de contenu : - Hygiene coatings : Floor coatings – Air-duct coatings – Hospital paints - Insecticidal paints - Air purifying paints - Anti-allergenic paints Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12591 [article]

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Process cycle time reduction of high solids alkyd using Taguchi statistical technique / G. S. Desai in PAINTINDIA, Vol. LI, N° 6 (06/2001)

[article]  inPAINTINDIA > Vol. LI, N° 6 (06/2001) . - p. 59-65 Titre : Process cycle time reduction of high solids alkyd using Taguchi statistical technique Type de document : texte imprimé Auteurs : G. S. Desai, Auteur ; V. Vijayabaskar, Auteur Année de publication : 2001 Article en page(s) : p. 59-65 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Matériau  revêtement'  'Peinture  haute  teneur  solide'  Liant  Formulation  'Alkyde  résine'  Préparation  Durée  'Méthode  statistique' Index. décimale : 667.9 Revêtements et enduits Résumé : Taguchi Statistical Technique has been used to reduce the process cycle time of high solids-high viscosity alkyd. Monoglycerolysis (MG) catalyst, esterification catalyst, addition of free fatty acid and pre-prepared monoglyceride and antioxidant are considered as the critical factors which can affect the process cycle time. These factors are studied at different levels using the L-8 model. The statistical technique - Analysis of Variance (ANOVA) - has been used to analyse the outcome of each experiment. Anti oxidant and MG catalyst affect the colour and drying time of alkyd resin, and therefore the effect of anti-oxidant and MG catalyst has also been critically analysed through this model. Note de contenu : - Taguchi statistical technique (TST) - Experimental : Apparatus – General processing method - Results and discussion : ANOVA summary on MG time – ANOVA summary on esterification time - ANOVA summary on colour - ANOVA summary on drying - Inference Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12592 [article]

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Pearl lustre pigments / R. Balaji Narasimhan in PAINTINDIA, Vol. LI, N° 6 (06/2001)

[article]  inPAINTINDIA > Vol. LI, N° 6 (06/2001) . - p. 67-72 Titre : Pearl lustre pigments Type de document : texte imprimé Auteurs : R. Balaji Narasimhan, Auteur Année de publication : 2001 Article en page(s) : p. 67-72 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Matériau  revêtement'  Peinture  'Pigment  minéral'  nacré'  Fabrication  'Plomb  carbonate'  'Bismuth  oxychlorure'  Mica  'Titane  oxyde'  'Fer  Silice  Alumine  'Structure  lamellaire' Index. décimale : 667.9 Revêtements et enduits Résumé : The history of pearl lustre pigments began 1656 in Paris when Japan isolated the silvery substance of the inside of fish scales and developed a suspension with silver lustre. The first pearl lustre suspension with its brilliant lustre was called Essenced Orient. It contained the same substance, which was later called natural fish silver. In the 17th century, buttons made of mother of pearl became popular and led to an upswing in the button industry in various European countries. The introduction of poly methyl methacrylate and unsaturated polyester in button manufacturing brought on the search for synthetic pearl lustre pigments and replaced fish silver and mother of pearl. The most valuable of all newly developed pearl lustre pigments proved to be basic lead carbonate. Bismuth oxy chloride, first implemented for the reflection layers, grew to the second most important synthetic pearl lustre pigment. Around 1960, a new pigment generation on the basis of metal oxide coated mica platelets was introduced to the market. The first of these pearl lustre pigments replace basic lead carbonate from its application areas were titanium dioxide mica pigments. Today there are a multitude of variations of such pigments for many decorative and technical applications on the market. The use of oxides such as iron oxides, chromium oxide or mixed oxides instead of titanium dioxide permits a steady growing application of artificial pearl lustre effects. This paper gives a brief idea about the manufacture and properties of pearl lustre pigments. Note de contenu : - Manufacturing and properties of pearl lustre pigments - Natural pearl luster pigments - Basic lead carbonate : High refractive index – Good transparency without self-colour – Platelet structure with smooth surface – Optimal thickness – Manufacturing and properties - Bismuth oxychloride - Metal oxide mica pigments : Pigment particle dimensions – Structural principles - Manufacturing process for titanium dioxide mica pigments : -Homogeneous hydrolysis – Titration method - Iron (III) oxide mica pigments : Manufacturing and properties - Combination pigments - New pearl luster pigments based on silica and alumina flakes : Effect pigments based on silica flakes – Effect pigments based on alumina flakes - Functional metal oxide mica pigments : Bright conductive pigments – Manufacture and structural principles – Characteristics of conductivity - Magnetic pigments Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12608 [article]

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