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Technology frontiers in gloss emulsion paint / Tapan K. Dhar in PAINTINDIA, Vol. L, N° 7 (07/2000)

[article]  inPAINTINDIA > Vol. L, N° 7 (07/2000) . - p. 33-40 Titre : Technology frontiers in gloss emulsion paint Type de document : texte imprimé Auteurs : Tapan K. Dhar, Auteur Année de publication : 2000 Article en page(s) : p. 33-40 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Matériau  revêtement'  'Peinture  eau'  émulsion'  'Propriété  optique'  Brillant  Formulation  Pigment  Adjuvant  rhéologique'  'Article  synthèse' Index. décimale : 667.9 Revêtements et enduits Résumé : Over the past decade, the interest in gloss emulsion paints has been growing, driven by environment-friendly and fire hazard-free nature of the product coupled with its low-odour, quicker drying and easy clean-up. This product seeks to be an alternative to the conventional alkyd based synthetic enamel. This is still a distant goal. Development of a gloss emulsion paint is fraught with many technical issues. The inherent nature of the emulsion polymer requires a trade-off between the film formation capability and performance properties of the film. Poor gloss development results from the inferior flow-out due to rapid coalescence, inefficient pigment wetting and shrinkage. The water sensitivity, low solids and low film build are the other issues to be addressed. The optimization of the technical parameters is further to be balanced with the cost of the product. These challenges are sought to be met by deep exploration of the film formation process and the interactive influence of various components like film former, pigment, thickener and the other additives. Some options are also available for the pigment dispersion process. Note de contenu : - Gloss and coalescence - Development in film formers - Use of separate grind resin - Pigments and pigment preparation - Rheology modifiers - Other additives Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12748 [article]

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Role of silicone in masonry coatings - a review / Suvarna Dagli in PAINTINDIA, Vol. L, N° 7 (07/2000)

[article]  inPAINTINDIA > Vol. L, N° 7 (07/2000) . - p. 41-46 Titre : Role of silicone in masonry coatings - a review Type de document : texte imprimé Auteurs : Suvarna Dagli, Auteur Année de publication : 2000 Article en page(s) : p. 41-46 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Matériau  revêtement'  Peinture  Utilisation  Bâtiment  Maçonnerie  Formulation  Liant  'Siloxane  polymère'  Adjuvant  'Agent  hydrophobe'  Adhésif  'Article  synthèse' Index. décimale : 667.9 Revêtements et enduits Résumé : Paint is a beautifully rather colourfully developed science. This science is developed not only in the direction of decoration or protection, but it fulfills both the requirements. The protective function of the paint varies with substrate and climatic conditions. Although silicones are popular for their heat resistant characteristic in the field of automotive paints, they are also used in masonry coatings as a very important ingredient. Silicone resins and various forms of silicones are used at different stages in masonry coatings. This review paper deals with the effect of silicones on masonry coating and how the performance of a paint is improved by using silicones as resin, water repellent, sealant, adhesive, etc. Note de contenu : - SILICONE A BRIEF INTRODUCTION - PROPERTIES OF SILICONE MASONRY PAINTS - APPLICATIONS OF SILICONE FOR MASONRY PROTECTION : Masonry paints - Construction chemicals - Construction materials - SILICONE RESINS : Structure - Effect of structure - ROLE OF SILICONE RESINS - SILICONE : SEALANTS AND ADHESIVES - SILICONE - AS WATER REPELLANTS - ROLE OF SILICONE IN PRIMER : Requirements of the primer for masonry - EFFECTIVENESS OF SILICONE : Effect of silicone on water vapour permeability - Effetc silicone on water resistance - Effect silicone on weather resistance - SILICONE EMULSION PAINTS MAKE A DIFFERENCE - SILICONE - A TECHNICAL VIEW - LATEST TREND : SMC technology Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12749 [article]

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Studies of degradation kinetics of novalac epoxy polyamide system / Madhu Bajpai in PAINTINDIA, Vol. L, N° 7 (07/2000)

[article]  inPAINTINDIA > Vol. L, N° 7 (07/2000) . - p. 47-50 Titre : Studies of degradation kinetics of novalac epoxy polyamide system Type de document : texte imprimé Auteurs : Madhu Bajpai, Auteur ; Sunita Seth, Auteur Année de publication : 2000 Article en page(s) : p. 47-50 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Epoxyde  résine'  Novolaque  'Polymère  réticulé'  'Stabilité  thermique'  'Dégradation  Cinétique  'Energie  activation'  'Ordre  réaction'  'Etude  expérimentale'  novolaque' Index. décimale : 667.9 Revêtements et enduits Résumé : The novolac epoxies of different phenol formaldehyde ratios were cured with a polyamide adduct having amine value 226.5 mg/KOH. The thermogravimetric analysis of these resins were carried out to study degradation kinetics. The order of reaction was found to be one. The activation energy of the resins was found to be in increasing order (127-217) Joule mol') with the increase in molecular weight. The glass transition temperature (Tg) ranged from 97° to 224°C determined by Differential Scanning Calorimetry. Revue / Journal Title Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12750 [article]

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The development of pre-construction primer to meet the changing demands of shipbuilding technology / Sunil Kale in PAINTINDIA, Vol. L, N° 7 (07/2000)

[article]  inPAINTINDIA > Vol. L, N° 7 (07/2000) . - p. 51-54 Titre : The development of pre-construction primer to meet the changing demands of shipbuilding technology Type de document : texte imprimé Auteurs : Sunil Kale, Auteur Année de publication : 2000 Article en page(s) : p. 51-54 Langues : Anglais (eng) Tags : 'Matériau  revêtement'  'Peinture  primaire'  anticorrosion'  primaire  réactive'  Utilisation  'Construction  navale'  'Elément  préfabriqué'  'Shop  primer' Index. décimale : 667.9 Revêtements et enduits Résumé : Shipbuilding is a highly competitive industry and against a background of increasing capacity and depressed prices, it is clear that only the best will survive. Shipyards are clearly reviewing all technologies and seeking opportunities to improve productivity. Several key areas are directly related to shop primer technology. These are welding speed, welding quality and secondary surface preparation. In order to improve productivity attention must be focused on reducing the build cycle and minimising rework resulating from weld quality and excessive secondary surface preparation. In addition to these productivity factors yards must also ensure that they comply with the latest legislative and environmental requirements that continue to limit the coating solutions avalaible to them. Note de contenu : - WORLD CLASS MANUFACTURING : Design Cycle - Short build cycle - Zero defects - Zero stocks - SHOP-PRIMER DEVELOPMENTS : Mechanism of porosity generation - Effect of joint type on porosity - Effect of welding rate on porosity - Thermal stability heat resistance - White rust resistance Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12751 [article]

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The benefits of surface and interfacial analysis for the printing industry / Robin H. West in PAINTINDIA, Vol. L, N° 7 (07/2000)

[article]  inPAINTINDIA > Vol. L, N° 7 (07/2000) . - p. 73-78 Titre : The benefits of surface and interfacial analysis for the printing industry Type de document : texte imprimé Auteurs : Robin H. West, Auteur ; J. A. Swift, Auteur Année de publication : 2000 Article en page(s) : p. 73-78 Langues : Anglais (eng) Tags : Encre  Impression  'Analyse  surface'  'Propriété  interface'  'Pigment  minéral'  'Noir  carbone'  'Titane  Oxyde'  'Traitement  Défaut Index. décimale : 667.9 Revêtements et enduits Résumé : Printing performance is controlled by chemical and physical processes which occur at critical interfaces of a printing system. For example, the receptivity and stability of a surface for ink retention can be critically controlled by the state of its outermost atomic layers. Trace levels of contamination and the migration of additives to the bonding interfaces are all potential causes of print failure. Many problems in this industry are difficult to detect using conventional analysis techniques where the sampling depth and chemical specificity are insufficient. Techniques such as ToF SIMS and XPS provide a route to understanding the chemical properties of this region. Yet the application of these techniques in this sector is still relatively new with comparatively little work published in the open literature. This paper presents a series of worked examples from different aspects of the printing industry (from pigment formulation to consumer packaging) to illustrate how the surface can control product performance and how techniques for surface analysis play a critical role both in trouble shooting as well as new ink/formulation and product development. The latest advances for molecular identification by high resolution ToF SIMS and for film thickness/depth analysis by angle dependent XPS are also described. Note de contenu : - SURFACE ANALYSIS OF PIGMENT : Carbon blacks - Coated titanium dioxide pigments for coatings application - Bronze flake pigments - Silane treated silica pigments - SURFACE TREATMENTS AND STABILITY - BURIED INTERFACE EVALUATION BY DEPTH PROFILING ANALYSIS - DEFECTS IN PRINTED INKS : Ink disbondment - Fading of pigments - PRINCIPAL SURFACE ANALYSIS TECHNIQUES : X-ray photoelectron spectroscopy - Secondary ion mass spectrometry (Static SIMS, Dynamic SIMS) Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12752 [article]

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