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Self stratifying coating : A review / Sudip Nath in PAINTINDIA, Vol. LII, N° 10 (10/2002)

[article]  inPAINTINDIA > Vol. LII, N° 10 (10/2002) . - p. 31-40 Titre : Self stratifying coating : A review Type de document : texte imprimé Auteurs : Sudip Nath, Auteur Année de publication : 2002 Article en page(s) : p. 31-40 Note générale : Bibliogr. Langues : Anglais (eng) Tags : Autostratification  'Article  synthèse'  'Revêtement  multicouche'  Stratification  'Formation  film'  Peinture  'Matériau  revêtement' Index. décimale : 667.9 Revêtements et enduits Résumé : In this paper, recent advances in coating industries namely self-stratifying coating has been discussed from mechanistic point of view. After application as thinned film, self stratifying coating does spontaneously form two coherent layers as base coat/clear coat, primer/top coat in one single operation. The necessary requirements for this type of coating have been discussed in detail, including compatibility between the resins, surface energies and other parameters. Stratification can be predicted from the extent of overlaping of solubility spheres using Hansen solubility parameters (HSP) and surface energies. Various factors like evaporation rate, viscosity, film thickness and curing rate effecting self stratifying coating have also been focused on. Very good stratification have been observed in epoxy/acrylic, epoxy vinylether copolymer and epoxy/floro ethelene in their unpigmented systems. Success have also been achieved to locate a protective pigment in the primer and subsequent clear over it. Good stratification were also formulated with the adhesion promote silane coated rutile, where protective pigment was located in the primer layer while rutile in top-coat. Note de contenu : - THEORY FOR STRATIFICATION - NECESSARY CONDITION FOR STRATIFICATION - PREDICTION OF STRATIFICATION - Application of Hansen solubility parameter (HSP) - Stratification from solid resin surface energies - Solution surface energies - FACTOR EFFECT STRATIFICATION - Preferential evaporation of solvents - Effect of curing agents on stratification - Film thickness - Pigments systems - Molecular weight - Additives Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12413 [article]

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Overview of reactors for emulsion polymerization process / E. Saravanakumar in PAINTINDIA, Vol. LII, N° 10 (10/2002)

[article]  inPAINTINDIA > Vol. LII, N° 10 (10/2002) . - p. 41-52 Titre : Overview of reactors for emulsion polymerization process Type de document : texte imprimé Auteurs : E. Saravanakumar, Auteur Année de publication : 2002 Article en page(s) : p. 41-52 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Article  synthèse'  'Réacteur  tubulaire'  agité'  polymérisation'  'En  continu'  discontinu'  'Polymérisation  émulsion'  Latex  Polymère Index. décimale : 667.9 Revêtements et enduits Résumé : In emulsion polymerization, reactor type and operational condition have a marked influence on polymer properties such as distribution of molecular weight, microstructure of polymer and particle size. Reaction engineering for emulsion polymerization requires understanding of fluid dynamics and mixing, heat transfer, process monitoring, colloid science, microeconomics and the mechanisms and kinetics of the multiple chemical and physical reaction steps. Incorporating the developed knowledge in an integrated product process development effort would help to reduce costs, decrease time to market and increase product quality. Various types of reactors and their modification to satisfy the necessity of quality product have been reviewed in this paper. Note de contenu : - TYPE OF REACTORS - Batch process - Semi-batch process - Continuous process - Continuous stirred tank reactors ( CSTR's) - TUBULAR REACTOR - LOOP REACTOR - loop reactor process - Product quality - CONTINUOUS BENCH SCALE PROCESS - OTHER CONTINUOUS PROCESSES Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12414 [article]

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The colorimetric principles of pearl lustre pigments / Tejashree K. Sawant in PAINTINDIA, Vol. LII, N° 10 (10/2002)

[article]  inPAINTINDIA > Vol. LII, N° 10 (10/2002) . - p. 53-62 Titre : The colorimetric principles of pearl lustre pigments Type de document : texte imprimé Auteurs : Tejashree K. Sawant, Auteur Année de publication : 2002 Article en page(s) : p. 53-62 Note générale : bibliogr. Langues : Anglais (eng) Tags : Colorimétrie  Couleur  'Propriété  optique'  'Pigment  nacré'  minéral'  Peinture  'Matériau  revêtement' Index. décimale : 667.9 Revêtements et enduits Résumé : Measuring the colour and appearance of pearlescent pigments in products is becoming more important as manufacturers strive to control raw material variations, processing and quality. Objectively evaluating pearlescent colour and appearance and interpreting the results, however, is a complex process. The process is further complicated by the unique optical properties and variety of applications for pearlescent pigments, as well as the availability of various color measurement instruments. This article gives brief idea of optical properties and colorimetric aspect of pearl lustre pigment. Note de contenu : - OPTICAL PRINCIPLES OF VARIOUS PIGMENTS - OPTICAL PROPERTIES OF THE PLEARLESCENT PIGMENTS - LUSTRE OG THE PEARL LUSTRE PIGMENT - COLOUR SHIFT WITH CHANGING ANGLE OF INCIDENCE - INTERFERENCE PHENOMENON OF PEARL LUSTRE PIGMENTS - PRACTICAL COLORIMETRICS OF PEARL LUSTRE PIGMENTS - MEASUREMENTS GEOMETRY AND BACKGROUND COLOUR - USE OF COLOUR COORDINATES - COLORIMETERS FOR PEARLS LUSTRE PIGMENTS - COLOUR-FLOP MEASUREMENTS - GONIOSPECTROPHOTOMETER - geometry of multi-angle spectrophotometer - Forward viewing system - Reverse viewing system - INTERPRETATION OF THE MEASUREMENT DATA - APPLICATION POSSIBILITIES OF COLORIMETRICS FOR PEARL LUSTRE PIGMENTS Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12415 [article]

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Quinophthalone colorants / N. Sekar in PAINTINDIA, Vol. LII, N° 10 (10/2002)

[article]  inPAINTINDIA > Vol. LII, N° 10 (10/2002) . - p. 63-64 Titre : Quinophthalone colorants Type de document : texte imprimé Auteurs : N. Sekar, Auteur Année de publication : 2002 Article en page(s) : p. 63-64 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Indane-1,3-dione(2-[2-quinolylidène])'  'Quinophtalone  dérivé'  'Indane  'Composé  bicyclique'  'Hétérocycle  azote'  'Quinoléine  Jaune  'Colorant  acide'  'Synthèse  chimique'  dispersé' Index. décimale : 667.9 Revêtements et enduits Résumé : Quinophthalone colorants derive their name from the parent compound quinophthalone, synthesized in the year 1882 by Jacobsen by heating quinaldine (2-methylquinoline) with phthalic anhydride at about 220° for a few hours in presence of zinc chloride. Constitutional aspects of quinophthalone was studied and established by Methta, Eibner, Hofmann, Kuhn, Baer and others. They represent small and old but still very important range of methine colorants. They have a long history as dyes, mainly as disperse dyes, acid dyes and paper dyes. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12416 [article]

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Hazardous waste / K. N. Aras in PAINTINDIA, Vol. LII, N° 10 (10/2002)

[article]  inPAINTINDIA > Vol. LII, N° 10 (10/2002) . - p. 65-66 Titre : Hazardous waste Type de document : texte imprimé Auteurs : K. N. Aras, Auteur Année de publication : 2002 Article en page(s) : p. 65-66 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : The HSE column - Hazardous wastes found dumpte in the open environment, have been the cause of pollution of ground water. The high power Committee report on the situation of hazardous waste in India is alarming. A world Bank report indicates that ground water in 74 out of 184 taluks in Gujarat is heavily polluted. This article reviews the present situation in India. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12417 [article]

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Phthalocyanine pigments in printing inks / N. Sekar in PAINTINDIA, Vol. LII, N° 10 (10/2002)

[article]  inPAINTINDIA > Vol. LII, N° 10 (10/2002) . - p. 67-68 Titre : Phthalocyanine pigments in printing inks Type de document : texte imprimé Auteurs : N. Sekar, Auteur Année de publication : 2002 Article en page(s) : p. 67-68 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=12418 [article]

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