Implication of coalescing agents and associative thickeners on rheology of water borne coatings / Ritesh A. Bhavsar in PAINTINDIA, Vol. LXII, N° 6 (06/2012)

[article]  inPAINTINDIA > Vol. LXII, N° 6 (06/2012) . - p. 49-54 Titre : Implication of coalescing agents and associative thickeners on rheology of water borne coatings Type de document : texte imprimé Auteurs : Ritesh A. Bhavsar, Auteur ; Vaibhav J. Dave, Auteur ; Randhirsinh Parmar, Auteur Année de publication : 2012 Article en page(s) : p. 49-54 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Coalescence (Sciences physiques) Epaississants Latex Polyacryliques Polymères en émulsion Revêtements en phase aqueuse:Peinture en phase aqueuse Rhéologie Index. décimale : 667.9 Revêtements et enduits Résumé : Screening specific concentration of ingredients is a difficult job while formulating a latex paint. It is the composition of binder and various ingredients such as pigments, coalescing agents, thickeners, surfactants, wetting agents, etc. The properties of paint are highly dependent upon the property of binder and its interactions with other ingredients. Rheology is one of the important property for paint, responsible for its performance during manufacture, storage and applications. In this study we discuss the theological interactions of acrylic emulsion (AE) with coalescing agents and associative thickeners to screen these ingredients for the paint formulation. Two hydrophobic coalescing agents and three types of HEUR (hydrophobically modified ethoxylated urethane thickener) and HASE (hydrophobically modified alkali swellahle emulsion thickeners) classified as high, mid and low shear thickener with different concentration are used in this study. Flow curve, 31TT (Three Interval Thixotropy Test), Oscillatory amplitude sweep test (AS) are carried out to study the influence of these ingredients on rheology. She viscosity increases as the concentration of coalescing agent and associative thickener increases. The mechanism of interaction and efficiency of ingredients with acrylic emulsion is discussed. Note de contenu : - EXPERIMENTAL : Materials and methods - Rheological measurements - RESULTS AND DISCUSSION : Effect of coalescing agent - Interactions of associative thickener with acrylic emulsion Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15650 [article]

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Intelligent functions of coatings of 21st century for safer, cleaner & sustainable world / Vaibhav J. Dave in PAINTINDIA, Vol. LXV, N° 8 (08/2015)  

[article]  inPAINTINDIA > Vol. LXV, N° 8 (08/2015) . - p. 53-90 Titre : Intelligent functions of coatings of 21st century for safer, cleaner & sustainable world Type de document : texte imprimé Auteurs : Vaibhav J. Dave, Auteur ; Sneha Saha, Auteur ; Sanjay Das, Auteur ; Nirmalya Moitra, Auteur Année de publication : 2015 Article en page(s) : p. 53-90 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antimicrobiens Engins explosifs -- Détection Isolation acoustique Matériaux intelligents Matériaux piézoélectriques Matériaux poreux Peinture solaire Revêtements:Peinture Surfaces fonctionnelles Transition de phase En physique, une transition de phase est une transformation du système étudié provoquée par la variation d'un paramètre extérieur particulier (température, champ magnétique...). Cette transition a lieu lorsque le paramètre atteint une valeur seuil (plancher ou plafond selon le sens de variation). La transformation est un changement des propriétés du système. Index. décimale : 667.9 Revêtements et enduits Résumé : Disturbance of domestic ambience by external chemical and biological intruder have a direct impact on general hygiene, safety and sustainability. Although a significant progress has been made in modern science to tackle these problems, their application in coatings has rarely been carried out, which have a huge potential for development of customized coatings, that is on demand coating functionality. Inspired by these technologies, here, in this review we will describe some of the advances in modern science which have application in coatings for improvement of general health, hygiene, safety and sustainability. Introduction of functionalities in the coatings is the key for developing coatings with desirable properties, for example omniphobic surfaces, nanoparticle and polymers having antimicrobial properties when incorporated in coatings can easily improve the overall hygiene there by health. In similar fashion Piezo electric materials, and TNT color sensors when applied to coatings can detect damage sites in buildings and presence of explosives, thus, increasing the general safety. Furthermore, phase changing materials and coatings that can convert sunlight to electricity offers alternatives for maximizing output from natural resources providing a much sustainable environment. Note de contenu : - HEALTH AND HYGIENE : Slippery liquid-infused porous surfaces : A new direction for omniphobic coatings - Anti-microbial coating - Sound dampening coating - Porous coordination polymer - SAFETY : Piezo electric paint (sensor) - Exploration of piezoelectric composite (Paint):[20,24-28] - Few validations of the composite sensors [29-30] - TNT detector - SUSTAINABILITY : Solar paint - Below section briefs on each category of organic solar cell working mechanisms and their benefits - Phase changing material En ligne : https://drive.google.com/file/d/1Vq5q8JA6lGZScPr21vdnhogi7_HLXfAH/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24751 [article]

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Technological scenario for green and sustainable architectural coatings / Vaibhav J. Dave in PAINTINDIA, Vol. LXIV, N° 8 (08/2014)  

[article]  inPAINTINDIA > Vol. LXIV, N° 8 (08/2014) . - p. 56-70 Titre : Technological scenario for green and sustainable architectural coatings Type de document : texte imprimé Auteurs : Vaibhav J. Dave, Auteur ; Rachana S. Surana, Auteur Année de publication : 2014 Article en page(s) : p. 56-70 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chimie écologique Composés organiques -- Synthèse Composés organiques volatils Copolymère éthylène acétate de vinyle Copolymères -- Synthèse Durée de vie (Ingénierie) Monomères Polyalkydes Polymères en émulsion Revêtements en bâtiment:Peinture en bâtiment Index. décimale : 667.9 Revêtements et enduits Résumé : Global concerns of environmental pollution and greenhouse gas (GHG) emission has led growing legislative stringency to be more tightened in present scenario. Increased consumer/user awareness towards green and sustainable chemistry is a demanding factor for major coatings and raw material suppliers to direct their efforts, either in the area of reformulating their existing product formulations or adopt new approaches to meet the requirements. Architectural coatings occupy around 55% portion of the total global coating consumption. Ultra low and Zero VOC coatings with low odor are the need of the hour for sustaining the business as well as future of the coating industry. This review article highlights the progress in the area of designing green architectural coatings with special focus on water based paints including the processing and chemistry of emulsion polymers viz. acrylics, VeoVa, EVA and waterborne alkyd technology for glossy finishes. Some critical paint ingredients which are major contributors of VOC like coalescing aids, rheology modifiers, surfactants and other additives are also being addressed with reference to legislative aspects. Further alternatives over depleting petro-products such as biochemicals (bio- monomers) and renewable sources of raw materials to ensure sustainability are discussed. Note de contenu : - GREEN AND SUSTAINABLE IN COATINGS CONTEXT - APPROACHES AND CRITERIA FOR MAKING COATINGS A GREEN/SUSTAINABLE PRODUCT : 1. VOC and its impact - 2. Why is VOC a major concern ? - 3. Measurement of VOc in paints - 4. Persistence of VOC - 5. VOC regulations - VOC REDUCTION IN ARCHITECTURAL PAINT : 1. Strategies to reduce VOCs in the binder - 2. Reducing of free monomers from the binder - 3. Increasing extent of monomer conversion - 4. Processing changes to remove unreacted monomers - 5. Coalescing waters - 6. Green Trends in formulation acids - 7. Synthesis of vinyl acetate and ethylene - 8. Synthesis of various acrylic monomers - 9. Waterborne alkyd resin - 10. Vegetable oil macromonomers (VOMM) En ligne : https://drive.google.com/file/d/11YeABshpHoemgUXuVS5u9fCfLm7eSw1J/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22106 [article]

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