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Gelcoat used in fibre reinforced composite structure and effect of including nanofillers in it / Abhijit Singh in PAINTINDIA, Vol. LXVII, N° 3 (03/2017)  

[article]  inPAINTINDIA > Vol. LXVII, N° 3 (03/2017) . - p. 53-60 Titre : Gelcoat used in fibre reinforced composite structure and effect of including nanofillers in it Type de document : texte imprimé Auteurs : Abhijit Singh, Auteur ; Durgesh Kumar Soni, Auteur Année de publication : 2017 Article en page(s) : p. 53-60 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Charges (matériaux) Composites à fibres Formulation (Génie chimique) Gelcoat Index. décimale : 667.9 Revêtements et enduits Résumé : Most surface coating application begins with the structure or article to be coated. The surface needs to be prepared sa as to remove contaminants that would detract the adhesion of the coating. However, there are one type of surface coating system that is used in quite opposite manner. These coatings are called gelcoats. They are used in such a way that substrate is built up onto the coating se that the gelcoat becomes an integral part of the article to be produced. The optimal dispersion of the nanofillers in the resin is a key factor for achieving the aforementioned properties. Note de contenu : - GELCOAT - COMPOSITION OF GELCOATS : Polyester resin - Monomer - Thixotropes - Fillers - Pigments - Accelerators - Catalyst - Other additives - CURING OF GELCOAT - APPLICATION METHODS : Spray application - 'Hot pot' guns - Catalyst injection - GELCOAT THICKNESS - MANUFACTURING OF FRP OR COMPOSITE PRODUCTS : Mold releasing mechanism - EFFECT OF NANO FILLERS IN GELCOAT : Viscosity - Tensile tests - Fracture test - Weatherometer test - ADVANTAGES OF GELCOATS - DEFECTS IN GELCOAT - APPLICATIONS : Boat painting - Mold use - Splatter finish - TABLE : Shows the thickness for gelcoat for various applications - FIGURES : 1. Mould on which gelcoat is to be applied - 2. Mixing the two components of gelcoat - 3. Application of gelcoat on mould - 4. Application ofresin on gelcoat, fabrication then binding the fabrication with resin - 5. Separation of mould from gelcoat - 6. Volume conductivity properties of the nanomodified gelcoats versus the reference gelcoat - 7. Log-log plot of the rheology properties of the epoxy gelcoats - 8. Stress-strain curves of the epoxy gelcoats - 9. Weight loss data of weatherometer test of the nano-modified gelcoats versus the reference gelcoat En ligne : https://drive.google.com/file/d/1Mgx14NI4_jFiclv08Tbj8NUlVwXc6_DS/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28446 [article]

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Recent developments in bio-based epoxy resin-A review / Virendra Patil in PAINTINDIA, Vol. LXVII, N° 3 (03/2017)  

[article]  inPAINTINDIA > Vol. LXVII, N° 3 (03/2017) . - p. 61-67 Titre : Recent developments in bio-based epoxy resin-A review Type de document : texte imprimé Auteurs : Virendra Patil, Auteur ; Prashant Samant, Auteur Année de publication : 2017 Article en page(s) : p. 61-67 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Biomatériaux Biopolymères Epoxydes Thermodurcissables Index. décimale : 668.9 Polymères Résumé : In recent decades awareness towards the environmental effluence has increased in society which urges the research and development of ecofriendly materials from renewable sources. Epoxy networks are amongst the most popular thermosetting polymers which are used in various applications, such as coatings, adhesives, insulation, castings, electrical, composites etc. The present review focuses on the recent developments in synthesis of partially or fully bio-based epoxy resins. In the recent literature there are many papers and reviews on the use of biomaterials for synthesis of epoxy resin, such as modified vegetable oils, carbohydrate based precursors, polyphenols, terpenes, rosin, natural rubber, lignin, isosorbide, furan, etc. Note de contenu : - Bio-based backbones for epoxy resins - Scheme 1 : Isosorbide based diglycidyl ether - Scheme 2 : Catechin based diglycidyl ether - Scheme 3 : Furanic based epoxy monomers - Scheme 4 : Cardanol based epoxies - Scheme 5 : Lignin based epoxies - Scheme 6 : Gallic acid based epoxies - Scheme 7 : Itaconic acid-based epoxies (TEIA) - Scheme 8 : Vegetable oil based epoxies - Commercial available bio-based epoxy resins. Conclusion and prospectus En ligne : https://drive.google.com/file/d/19Dw6Ge_6VdOSqsKmVZb6-yFJj8NX0yLy/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28447 [article]

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Effect pigments / Yash Melkeri in PAINTINDIA, Vol. LXVII, N° 3 (03/2017)  

[article]  inPAINTINDIA > Vol. LXVII, N° 3 (03/2017) . - p. 72-78 Titre : Effect pigments Type de document : texte imprimé Auteurs : Yash Melkeri, Auteur ; Tipanna Melkeri, Auteur Année de publication : 2017 Article en page(s) : p. 72-78 Langues : Anglais (eng) Catégories : Pigments à effets spéciaux Index. décimale : 667.2 Colorants et pigments Résumé : Effect pigments are those that exhibit special effects to various substrates in order to enhance its quality and to make it comparatively attractive to consumers. These pigments display a wide range of properties such as colour-travel, reflect or refract light, act as a mirror (metal flakes) and multiple colour effect called iridescence. Iridescence is an optical phenomenon of surfaces in which the hue changes with the angle of observation and the angle of illumination. It is often caused by multiple reflections from two or more semi-transparent surfaces in which the phase shift and interference of the reflections modulates the incidental light (by amplifying or attenuating some frequencies more than others). The term luster pigment is also often applied to these effect pigments because all effect pigments provide lustrous effect in practical applications. Note de contenu : - Coated substrate (pearlescent pigments) : Natural pearlescent pigments - Synthetic pearlescent pigments - Polymer stacks (iridescent film) - Helicones HC - Mirrors - Metallic flakes (silver, copper and bronze) - Basic lead carbonate - Bismuth oxy chloride crystals (BiOCl) - Titanium dioxide flakes (TiO2 flakes) - Micaceous iron oxide - Flakes type organic pigments - Metal salts stack - Market demand of effect pigments - FIGURES : 1. Ray diagram depicitng reflection, refraction and interference in various substrates - 2. Pearlescent pigments based on natural mica - 3. Polymer stacks - Iridescent films - 4. Helicones HC pigment - 5. Metallic pigment flakes - 6. Regular hexgonal crystal structure of basic lead carbonate - 7. Regular octagonal crystal structure of BiOCl - 8. TiO2 flakes - 9. Micaceous iron oxide - 10. Goethite an iron oxide, hydroxide effect pigment - 11. Effect pigment market value (2016-2021) En ligne : https://drive.google.com/file/d/1KR8VHYTjfagm_E7ddKLpqmdlq1XrMJ94/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28448 [article]

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Innovative functional concepts for barrier coatings / Anil Bansal in PAINTINDIA, Vol. LXVII, N° 3 (03/2017)  

[article]  inPAINTINDIA > Vol. LXVII, N° 3 (03/2017) . - p. 80-96 Titre : Innovative functional concepts for barrier coatings Type de document : texte imprimé Auteurs : Anil Bansal, Auteur Année de publication : 2017 Article en page(s) : p. 80-96 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Brillance (optique) Fibres inorganiques Formulation (Génie chimique) Matériaux -- Propriétés barrières Opacité (optique) Revêtement en phase solvant:Peinture en phase solvant Revêtements en phase aqueuse:Peinture en phase aqueuse Index. décimale : 667.9 Revêtements et enduits Résumé : Paints and coatings are not useful products by themselves, but they make other products look better, more durable, more attractive, safer, and more saleable. Paints and coatings are therefore considered enabling materials that add value to manufactured products. Think of a car without paint on it, or your nice teak wood furniture without a finish. Thin coats of paint, coating, or varnish bring life to these products and make them acceptable and durable. Mineral particles are used as fillers in a range of applications, including paper, decorative and functional coatings, plastics and ceramics. To a mineralogist, minerals are defined primarily by their chemical composition. For the producer and end user, the physical properties of these industrial mineral products such as size and shape distribution, refractive index, density, hardness, and color are of primary importance, since it is the combination of these, together with its crystal structure and surface chemistry, which gives the mineral its functionality. The morphology of the particles constituting the mineral within a desired particle size distribution can be a key factor in determining the functionality of the end use. There are many applications where the barrier properties of paints and coatings are key factors determining performance: For example, in protection against sunlight, air, moisture, dirt and corrosion of metals/substrate. The paint technologist therefore needs an understanding of the important parameters control ling permeability in order to design an appropriate product. Minerals with a high aspect ratio, when aligned in a coating structure, create a tortuous path that can reduce the penetration rate of a permeating material. At a constant coat weight, there are more thin plate stacks compared to a blocky mineral system. This creates a more tortuous path for liquid and vapour penetration. So, it is clear that higher aspect ratio materials give reduction in permeability, compared to more blocky system. In general, platy particles overlap in a film and prevent water, oxygen or other chemicals to reach the substrate basis directly, meaning the time for corrosion stimulators to start their work is increased. The addition of such platy additives in rust prevention, anti-corrosive and concrete coati ngs ensure optimal performances for surface protection. There are many ways to define sustainability, but when most people here the word "sustainable," they immediately think "green". Often the most important, long term sustainability goal for businesses is having environmentally responsible products and practices — those that lessen or eliminate negative impacts on the environment. Environmentally sustainable practices can have long-lasting effects. Most barrier solutions available on the market are based on polyethylene, or additives containing harmful halogens. Though these components give excellent results as a barrier but have a very harmful impact on health and environment. Therefore, ail our barrier coating is mineral based solutions having no negative impact on health and environment. They provide a prise-competitive and environmental friendly alternative. High aspect ratio wet ground Mica provides barrier formation for anti-corrosion coatings impeding the transport of aggressive species into any metal surface. Surface modified platy minerals for green corrosion protection coatings can be used to formulate eco-friendly corrosion protection coatings which no longer require special labelling, giving them a genuine market advantage. Even without the addition of corrosion protection pigments, these formulations provide outstanding protection. Lamellar high aspect ratio talc increase barrier effect of the paint film by increasing hiding power, mud crack and weather resistance. Lamellar talc grades is white and produced with special grinding technique not to destroy natural lamellarity. It can be micronized without distorting it's structure due to advanced technology. Platy iron oxide provides tough barrier surface and excellent UV absorption layer. They are excellent weather resistant and anti-rust. They are also used in zinc-rich primers. In this study, different functional play minerals were evaluated in relation to their corrosion protection, based on barrier behavior. The following platy minerals were used for study : surface modified kaolin, lamellar high aspect ratio talc, wet groung mica and platy iron oxide. Note de contenu : - Platy minerals provide following properties in paints & coatings - AR TALC T-LAMELLAR HIGH ASPECT RATIO TALC : Solution for industrial coatings - SEM IMAGE OF NORMAL MICRONIZED TALC AND HIGH ASPECT RATIO TALC - AR TALC IMPROVES THE PERFORMANCE OF INDUSTRIAL PAINTS AND PRIMERS : Corrosion protection - Weather, scrub, colour UV resistance - VOC reduction - AR TALC T as an extender in alkyd paint - AR TALC T AS AN EXTENDER IN HIGH PVC EMULSION DECORATIVE PAINT - AR TALC IMPROVE DY HIDING POWER AND MAKE COST-EFFECTIVE TiO2 EXTENDERS - OBSERVATION - HYPERLITE ST-HYDROPHOBICALLY MODIFIED CALCINED KAOLIN RE-THINKING WATER REPELLENCY : Protection against water, natural enemy for masonries - Guide formulation for exterior emulsion paints for water repellency by using surface treated flash calcined kaolin - HIGH PERFORMANCE - LOW WATER ABSORPTION (FASTER DRYING) : High performance - Low fouling - High performance - Beading effect - CUSTOMER BENEFITS OF HPERLITE ST AT A GLANCE (see Table 4) - MICRON FERROX NRL-PLATY RED OXIDE. HIGH QUALITYPIGMENTS FOR MARINE & PROTECTIVE PAINTS : Platy iron oxides as anti-corrosive pigments - Performance of micron ferrox -NRL - AR MICA T - WET GROUND MICA HIGH QUALITY PIGMENTS FOR EXTERIOR DURABILITY : Our wet ground mica has a high aspect ratio and is used in a broad range of applications, including - TABLES : 1. Guide formulationof alkyd paint by using AR talc t - 2. Guide formulation of high PVC emulsion decorative paint bu using AR talc T - 3. Guide formulation for exterior emulsion paints for water repellency by using surface treated flash calcined kaolin - 4. Guide formulation of premium exterior emulsion paint by using wet ground mica (AR mica T) En ligne : https://drive.google.com/file/d/1ZFMPHkXf-6SYS8e43n8eOClSerqI8Gff/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28449 [article]

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Water-based paints-additives / M. Veeramani in PAINTINDIA, Vol. LXVII, N° 3 (03/2017)  

[article]  inPAINTINDIA > Vol. LXVII, N° 3 (03/2017) . - p. 106-110 Titre : Water-based paints-additives Type de document : texte imprimé Auteurs : M. Veeramani, Auteur Année de publication : 2017 Article en page(s) : p. 106-110 Langues : Anglais (eng) Catégories : Agents dispersants (chimie) Agents mouillants Chlorure de polyvinyle Formulation (Génie chimique) Liants Matériaux -- Propriétés barrières Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- Additifs Index. décimale : 667.6 Peintures Résumé : Before concluding the binder part, let me give the readers an insight about Multi-Functional Additives, which are being talked about these days. A performance additive with a number of features that offer significant benefit to the formulators of water-based coatings is known as multi-functional additive". Now, a quick review about additives in general. Note de contenu : - Wetting and dispersing additives - Additive requirements for modern pigment pastes : Surface additives - FIGURES : How water soluble substances in exterior paints - How water soluble substances in exterior paints - How water soluble substances in exterior paints - Application performance - TABLES : Formulation example : Total replacement : Economy interior emulsion 75% pvc - Paint properties of the above formulations - Formulation example : Partial replacement : Economy interior emulsion 75% pvc - Paint properties of the above formulations En ligne : https://drive.google.com/file/d/1oaVs0RUXzE0j-8bJVp3aLk9XuHb2RbZ6/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28450 [article]

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Stoving enamels - 8 / Mukund Hulyalkar in PAINTINDIA, Vol. LXVII, N° 3 (03/2017)  

[article]  inPAINTINDIA > Vol. LXVII, N° 3 (03/2017) . - p. 112 Titre : Stoving enamels - 8 Type de document : texte imprimé Auteurs : Mukund Hulyalkar, Auteur Année de publication : 2017 Article en page(s) : p. 112 Langues : Anglais (eng) Catégories : Absorbeurs de rayonnement ultraviolet Formulation (Génie chimique) Revêtement émail:Peinture-émail Index. décimale : 667.9 Revêtements et enduits Résumé : Since even supposedly non-oxidizing materials such as coconut-oil alkyds exhibit oxidation products over long term exposure, and since antioxidants now on the market have been proved to inhibit ultraviolet degradation, it bas been theorized that the conversion of ultraviolet energy causes the formation of ozone, and that is the source of oxidation deterioration. It is, therefore, probable that materials such as zinc oxide or the ultraviolet-absorbing benzophenone compounds function as inhibitors of the formation of destructive ozone. En ligne : https://drive.google.com/file/d/1SFq2ZJ2F-FKyZgfcguabl8OlfhSjFTNB/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28451 [article]

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Average composition of typical oils / Mukund Hulyalkar in PAINTINDIA, Vol. LXVII, N° 3 (03/2017)  

[article]  inPAINTINDIA > Vol. LXVII, N° 3 (03/2017) . - p. 120-121 Titre : Average composition of typical oils Type de document : texte imprimé Auteurs : Mukund Hulyalkar, Auteur Année de publication : 2017 Article en page(s) : p. 120-121 Langues : Anglais (eng) Catégories : Huiles et graisses -- Constituants Index. décimale : 665 Technologie des huiles, graisses, cires, gaz industriels En ligne : https://drive.google.com/file/d/1mOrRdHTf8pLacSWqUcmYWLVx3F1tdDMk/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28452 [article]

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Corrosion and its control in petroleum industry / Nayan Jyoti in PAINTINDIA, Vol. LXVII, N° 3 (03/2017)  

[article]  inPAINTINDIA > Vol. LXVII, N° 3 (03/2017) . - p. 123-131 Titre : Corrosion and its control in petroleum industry Type de document : texte imprimé Auteurs : Nayan Jyoti, Auteur ; Durgesh Kumar Soni, Auteur ; P. K. Kamani, Auteur Année de publication : 2017 Article en page(s) : p. 123-131 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Anticorrosifs Anticorrosion Corrosion Industrie pétrolière et gazière -- Matériaux Métaux -- Revêtements protecteurs Index. décimale : 667.9 Revêtements et enduits Résumé : Corrosion in petroleum industry causes a loss of billions of dollars every year. Many cases of extensive corrosion have occurred in production tubing, valves, and in flow lines from the wellhead to the processing equipment. The reason for this is that ail and gas from the well contain varying amounts of water, which can be precipitated as a separate phase in contact with the material surface, and that th is water contains gases such as CO2 and possibly H2S, as well as salts. In most cases of severe corrosion, CO2 plays a major role. Uniform corrosion taking place causes 30% failures and other 70% is caused by Iocalized corrosion. Various methods of controlling corrosion are discussed here. Note de contenu : - Petroleum industry - Corrosion in petroleum industry - Corrosion in production : condensate wells - Sweet oil wells - Sour oil wells - Corrosion in transportation and storage - Corrosion in refinery units - Corrosion under insulation - Co2 and h2s corrosion in oil pipelines - Co2 corrosion -The effect of ph : The effect of temperature - H2s corrosion - The effect of hés - Concentration - Cost of corrosion - Type of corrosion occuring in petroleum industry and their solutions - Corrosion inhibitors - Inhibitors which create protective layers - Scavengers : Others - Anodic inhibitors - CATHODIC INHIBITORS - ANODIC-CATHODIC (MIXED) INHIBITORS : Example of corrosion En ligne : https://drive.google.com/file/d/1ogfrIt396cYzp1lrRTVcX9KLtuIcXzvF/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28453 [article]

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