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Architectural coating : review of failure & remedies / Priti Trivedi in PAINTINDIA, Vol. LXV, N° 7 (07/2015)  

[article]  inPAINTINDIA > Vol. LXV, N° 7 (07/2015) . - p. 53-63 Titre : Architectural coating : review of failure & remedies Type de document : texte imprimé Auteurs : Priti Trivedi, Auteur ; Radha Sachan, Auteur Année de publication : 2015 Article en page(s) : p. 53-63 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse des défaillances (fiabilité) Composés organiques volatils Revêtements -- Défauts:Peinture -- Défauts Revêtements décoratifs:Peinture décorative Revêtements en bâtiment:Peinture en bâtiment Index. décimale : 667.9 Revêtements et enduits Résumé : An architectural coating which is being developed on global technology, contributes a major share amongst other coatings across the world value base of about USD 121 billion, Volume base of about 38 MMT, decorative coatings about 50 % of total market. Asian Pacific contributes about 44%, Europe about 24%, North America about 18% and others about 14%. ln India architectural coating constitute 70% by value and 77% by volume. The global technology developments are aimed to address three major themes namely "Performance", "feasibility" and "sustainability". These three focus areas are directing the scientists to develop the solutions which bring unique solutions to the customers. The customers have become more demanding and asking for multifunctional performance in a single product. The challenge at the coating manufacturers is to meet these expectations considering the business feasibility and the long term sustainability of the same. Global coating industries are directed to work towards nanotechnology, smart coatings including diverse stimuli responsive coatings, advanced polymer architects, and functional nnaterials of various types. Note de contenu : - FUNCTIONS OF VARIOUS COMPONENTS USED IN ARCHITECTURAL COATINGS - PAINT AND COATINGS FAILURES : Primary cause of paint/coating related failures - Improper surface preparation - Improper coating selection - Improper application - Improper drying, curing and over coating times - Lack of protection against water and aqueous systems - Mechanical damage - MODE OF FAILURES : Formulation-related failures - Substrates-related failures - Physical defect-related failures - VOC (VOLATILE ORGANIC COMPONENTS) : What are volatile organic compounds ? - Why are regulations necessary ? - To whom do the degradation apply ? - What are the main requirements of the regulations - VOC calculation - Grams of VOC perliter of coating = (Ws-Ww-Wes)/Vm-Vw-Ves)/Vm En ligne : https://drive.google.com/file/d/1H_tXQtEdV-g0WS7Fo6NRq5dey86Q3Tqz/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24474 [article]

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Metal bonding in powder coating - The newest generation / Jayanta Dey in PAINTINDIA, Vol. LXV, N° 7 (07/2015)  

[article]  inPAINTINDIA > Vol. LXV, N° 7 (07/2015) . - p. 65-72 Titre : Metal bonding in powder coating - The newest generation Type de document : texte imprimé Auteurs : Jayanta Dey, Auteur Année de publication : 2015 Article en page(s) : p. 65-72 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Collage Extrusion (mécanique) Fragmentation Granulométrie Mélanges (chimie) Morphologie (matériaux) Pigments à effets spéciaux Pigments métalliques Poudres métalliques Revêtements poudre:Peinture poudre Taille des particules Index. décimale : 667.9 Revêtements et enduits Résumé : The demand for metallic powder coatings is growing permanently. The new generation bonded metallics do not show the application problems experienced in the past. The new generation of bonded metallics excel in colour consistency and charging. Years of relentless research into the bonding process and associated equipment have enabled us to produce metallic effects that until recently were only possible with wet paint systems. These advances will boost the growth of metallic effect powder coatings for many years to come. Note de contenu : - EFFECT PIGMENTS - PARTICLE SIZE - PARTICLE SHAPE - PIGMENT MORPHOLOGY - PARTICLE SIZE DISTRIBUTION : Pigment orientation - Flop effect - LEAFING AND NON-LEAFING METALLIC PIGMENTS - INCORPORATION OF METALLIC PIGMENTS : Extrusion/grinding - Dry blending - BONDING : Bonding process - The process - Process stage 1 to 4 - Master batch mixer - Cooler mixer - Determination of bonding quality - POWDER VS. LIQUID En ligne : https://drive.google.com/file/d/1X01-uwtUxVYNVxWhxSrs6L_sWkIfIrKP/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24475 [article]

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Eco-friendly coating materials based on renewable resources / Dhrubajyoti Kumar in PAINTINDIA, Vol. LXV, N° 7 (07/2015)  

[article]  inPAINTINDIA > Vol. LXV, N° 7 (07/2015) . - p. 73-80 Titre : Eco-friendly coating materials based on renewable resources Type de document : texte imprimé Auteurs : Dhrubajyoti Kumar, Auteur Année de publication : 2015 Article en page(s) : p. 73-80 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Biopolymères Chimie écologique Gluten Huiles et graisses végétales Liants Polymères -- Synthèse Protéines végétales Ressources renouvelables Revêtements:Peinture Index. décimale : 667.9 Revêtements et enduits Résumé : The utilization of renewable resources in the development of eco-friendly paints and coatings is of increasing interest in the chemical industry now due to their universal availability, inherent biodegradability, low price and low toxicity. Particularly, current research and development work on the application of vegetable ails and plant proteins in coating systems is addressed. Vegetable ails (VO) constitute the largest biodegradable family yielding materials that are capable of competing with petroleum based products. They have unique chemical structure with unsaturation sites, epoxies, hydroxyls, esters and other functional groups along with inherent fluidity characteristics. These enable them to undergo various chemical transformations producing low molecular weight polymeric materials with versatile applications, particularly in paints and coatings. Furthermore, the plant protein like wheat gluten was modified chemically to obtain aqueous protein dispersions that have excellent film-forming characteristics and strong adhesion to various surfaces. Wheat gluten films have very interesting mechanical properties such as extensibility and moisture permeability. Durability and water resistance of the coatings can be tailored by varying the degree of cross-linking of the protein binder. Based on the observed characteristics of the modified protein binders, the development of novel, organic solvent-free paints and coatings appears to be possible. This review paper presents an overview of the recent developments and perspectives on the application of renewable resources in coatings technology. We have briefly described VO derived materials such as alkyds, polyesteramides, polyetheramides, polyurethanes, epoxies, polyols along with their preparation and applications in Paints and coatings. The use of proteins as biopolymer binders in coatings formulations is also well described in this paper. Note de contenu : - VEGETABLE OILS AS POLYMERIC COATING MATERIALS : Alkyds - Polyesteramides (PEA) - Polyetheramides (PEtA) - Polyurethanes (PU) - Epoxies - Polyols - PROTEIN-BASED COATIGS : Wheat gluten coatings En ligne : https://drive.google.com/file/d/1FVEV5LpLOXLf-MgIyi_9nXTZPBpViBct/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24476 [article]

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Polyurethane in PAINTINDIA, Vol. LXV, N° 7 (07/2015)  

[article]  inPAINTINDIA > Vol. LXV, N° 7 (07/2015) . - p. 96 Titre : Polyurethane Type de document : texte imprimé Année de publication : 2015 Article en page(s) : p. 96 Langues : Anglais (eng) Catégories : Isocyanates Polyuréthanes Revêtements:Peinture Index. décimale : 668.9 Polymères Résumé : Isocyanates are very reactive compounds and will react with any compounds like amines, hydroxyl, water, carbolic, phenolic, amide containing an active hydrogen atour. Polyurethanes are the reaction products of poly-functional isocynates and polyhydroxy compounds. The physical and chemical properties of these coatings depend on type, functionality, and ratio of the reactants and curing conditions. Based on literature survey the choice of isocyanate required to produce a specific property depends on type of isocyanate i.e aliphatic, cycloaliphatic or aromatic. Some isocyanates are chosen for high thermal and fire resistance. The hydroxyl compound can be polyesters, polyethers, epoxies, alkyds, castor oil, hydroxyl, acrylics, partially hydrolysed vinyl copolymers, silicone resins. En ligne : https://drive.google.com/file/d/12gs55eK2l0ipFBhX9NPJzY2rzANoTVMh/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24477 [article]

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Additives -Thickeners and associative thickeners / M. Veeramani in PAINTINDIA, Vol. LXV, N° 7 (07/2015)  

[article]  inPAINTINDIA > Vol. LXV, N° 7 (07/2015) . - p. 108-112 Titre : Additives -Thickeners and associative thickeners Type de document : texte imprimé Auteurs : M. Veeramani, Auteur Année de publication : 2015 Article en page(s) : p. 108-112 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Argile Cellulose La cellulose est un glucide constitué d'une chaîne linéaire de molécules de D-Glucose (entre 200 et 14 000) et principal constituant des végétaux et en particulier de la paroi de leurs cellules. Epaississants hydroxyéthylcellulose Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- Additifs Index. décimale : 667.6 Peintures Résumé : Let's now go to the next additive called Thickeners. This is also an important additive which plays a vital role in bringing a uniform consistency of Water based Paints. Thickeners have mainly two functions, they increase the viscosity thereby, reducing the Pigment mobility to prevent settling and they change the flow and levelling characteristics. The most commonly used thickeners are derivatives of Carboxy Methyl Cellulose and Hydroxy Methyl Cellulose. However they suffer from certain disadvantages viz: poor flow and levelling, sensitive towards enzyme degradation. Thickening agents at moderate shear increase the viscosity and increase the coatings resistance to flow du ring stirring, mixing and pouring. Rheology modifiers are necessary additives to prevent sagging and spatter during application. They also help to retain supply viscosity, provide anti-sag control, water retention/open time, spatter and scrub resistance. Note de contenu : - Structure of hydroxy ethyl cellulose (HEC) - Organo clay thickeners - Formulating of water based paints with cellulosic thickeners - Formulating paint with associative thickeners - Alkali swellable associative thickeners En ligne : https://drive.google.com/file/d/1ww1Fe5AOwkgsI03XuoHAbhAZg56JE3c6/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24478 [article]

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Corrosion of concrete structures (Part-1) / P. K. Kamani in PAINTINDIA, Vol. LXV, N° 7 (07/2015)  

[article]  inPAINTINDIA > Vol. LXV, N° 7 (07/2015) . - p. 117-121 Titre : Corrosion of concrete structures (Part-1) Type de document : texte imprimé Auteurs : P. K. Kamani, Auteur Année de publication : 2015 Article en page(s) : p. 117-121 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Additifs Anticorrosifs Anticorrosion Béton armé Charbon, Cendres de Corrosion Durée de vie (Ingénierie) Eau Granulats Matériaux cimentaires Matériaux cimentaires -- Détérioration Mélange Index. décimale : 620.13 Matériaux de construction : pierre, ciment, béton, liants de Résumé : Concrete, the most abundant construction material of a structure, is prone to corrosion along with its reinforced steel. There are two basic conditions which degrade concrete : condition during production of concrete and secondly exposure condition during life time. There are number of factors responsible for corrosion on reinforced steel. A normal précaution in adopting the corrosion protection measures in raising a structure along with coating on structure can significantly enhance the life of structures. Note de contenu : - Aggregates - Fly ash - Admixtures - Mixing water - Production and curing of cement - Corrosion mechanism - Durability and deterioration of concrete En ligne : https://drive.google.com/file/d/194VL974YL9MFFM8cG5pEzJS8vdZluqF3/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24479 [article]

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Industrial paints and protective coatings / Mukund Hulyalkar in PAINTINDIA, Vol. LXV, N° 7 (07/2015)  

[article]  inPAINTINDIA > Vol. LXV, N° 7 (07/2015) . - p. 126 Titre : Industrial paints and protective coatings Type de document : texte imprimé Auteurs : Mukund Hulyalkar, Auteur Année de publication : 2015 Article en page(s) : p. 126 Langues : Anglais (eng) Catégories : Formulation (Génie chimique) Revêtements protecteurs Revêtements:Peinture Index. décimale : 667.6 Peintures Résumé : Usually Standard formulations I ike decorative paints are not suitable for below mentioned coatings. As the user specifications, application methods. Oven type & temperature duration varies and hence, Paint Chem ists have to formulate tailor made formulations to meet customers requirements. En ligne : https://drive.google.com/file/d/159L_kWMuGdOFSTGamWgfvr76udb1VfyJ/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40236 [article]

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