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Auteur Randhirsinh Parmar |
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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]
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
RhéologieIndex. 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 emulsionPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15650
in PAINTINDIA > Vol. LXII, N° 6 (06/2012) . - p. 49-54[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14083 - Périodique Bibliothèque principale Documentaires Disponible Modern paints and coating technologies : redefining the air quality / Surya Ghosh in PAINTINDIA, Vol. LXXIII, N° 4 (04/2023)
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Titre : Modern paints and coating technologies : redefining the air quality Type de document : texte imprimé Auteurs : Surya Ghosh, Auteur ; Randhirsinh Parmar, Auteur Année de publication : 2023 Article en page(s) : p. 54-77 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Air -- Epuration
Air intérieur -- Analyse
Air intérieur -- Pollution
Atmosphère -- Pollution -- Lutte contre
Chimie écologique
Composés organiques volatils -- Toxicologie
Odeurs -- Absorption
Revêtements -- Aspect de l'environnement:Peinture -- Aspect de l'environnementIndex. décimale : 667.9 Revêtements et enduits Résumé : Air Quality is very vital component of the human life and two important aspects which influence the air quality significantly these days are pollutants like toxins and obnoxious odors. There have been constant efforts made by the researchers globally to address these aspects by various technologies. The current paper is a review of the technology evolution and key scientific advancements in abatement of toxic compounds and obnoxious odors establishing the significant potential of paints and coatings in positively contributing to the clean air quality. The paper categorically reviews the technology strategies for toxic and odor removal, their characterizations and future potential for exploration, a step forward by paints and coating community to preserve the clean air quality, the vital gift of mother naturel. Note de contenu : - AIR-QUALITY AND TOXINS : Measuring the air quailty - Impact of toxins on human bieng - Key change drivers at paints and coating industries for the green/clean technologies
- MITIGATION METHODS OF TOXINS FROM AIR : Other approaches include
- CHARACTERIZATION TECHNIQUE TOXIC REMOVAL : Key challenges faced and opportunities of the future innovations
- BUSINESS INCENTIVES FOR ADAPTINGGREEN AND CLEAN TECHNOLOGIES
- AIR QUALITY AND OBNOXIOUS ODORS : Sources of the odors : odors areproduced from various sources which have negative influence on the surrounding - Various mitigation strategies for removal
- PAINTS AND COATING SYSTEM AS AN ABATEMENT FOR bad odor : Techologiccal innovation in the area of odor control - Odor mitigation strategies based on the adsorption approach - Odor absorption based on the chemical conversion methodology - Odor absorption based on regenerative catalyst - Summary : Various sources of odor causing materials and their removal strategies
- NEW ADVANCEMENTS IN ODOR CONTROL STRATEGIEES
- CHARACTERIZATION TECHNIQUES IN THE AREA OF ODOR ABSORPTION : Real time air quality monitoring
- KEY OPPORTUNITIES FOR THE FUTURE INNOVATIONS IN THE AREA OF ODOR CONTROL
- GREEN- CLEAN PRODUCT TECHNOLOGIES BY DESIGN : ABATEMENT OFTOXINS AND OBNOXIOUS ODOR CAUSING COMPOUNDS
- Table 1 : Prevalent air pollutants and their regulatory limits by India, United Nations, Europe and world health organization
- Table 3 : various symptoms due to increase in concenration of odorants
- Table 4 : Major indoor air pollutants and their sources
- Table 5 : Summary: various sources of odor causing materials and their removal strategies
- Fig. 1 : Cleaner production technologies
- Fig. 2 : Mechanism of reduction of formaldehyde by photocatalytic TiO2
- Fig. 3 : Business incentives for adapting green and clean technologies
- Fig. 4 : R2 = A2 + B2 + 2ABcosα (α = 0 then addition if α = 180 then subtraction)
- Fig. 5 : Process of adsorption
- Fig. 6 : Reaction mechanism of mercaptant to disulfides by oxidation
- Fig. 7 : Furfuryl mercaptan (C5H6OS) is an organic sulphur compound having urnt coffee odor (boiling point 155°C) is being converted to difurfural disulphide (boiling point 229°C)
- Fig. 8 : H2S conversion into powdered sulfur
- Fig. 9 : Shows block diagram of an electronic nose
- Fig. 10 : Green product design strategyEn ligne : https://drive.google.com/file/d/1Dya6rvsNSbPu2dTROnwCgQ69FBBd0hxh/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39665
in PAINTINDIA > Vol. LXXIII, N° 4 (04/2023) . - p. 54-77[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24115 - Périodique Bibliothèque principale Documentaires Disponible Rheological studies of automotive putty filler and correlation with their performance characteristics / Dhrubjyoti Kumar in PAINTINDIA, Vol. LXIII, N° 10 (10/2013)
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Titre : Rheological studies of automotive putty filler and correlation with their performance characteristics Type de document : texte imprimé Auteurs : Dhrubjyoti Kumar, Auteur ; Ritesh A. Bhavsar, Auteur ; Randhirsinh Parmar, Auteur ; Sudhir Deshpande, Auteur Année de publication : 2013 Article en page(s) : p. 61-67 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Automobiles -- Revêtements:Automobiles -- Peinture
Carrosseries -- Entretien et réparations
Charges (matériaux)
Durée de vie (Ingénierie)
Mastics
Rhéologie
Rhéométrie
Thixotropie
ViscositéIndex. décimale : 667.9 Revêtements et enduits Résumé : Auto body paint repair system is fairly a complex system utilizing a variety of products of which putty is one of the important components. The application properties viz. ease of application ; flow, leveling, sagging, etc and shelf stability of the putty fillers are governed by its rheology. In the present study, application properties and shelf stability of six putty samples (premium, economic, and low cost grade) were studied using rheometer. Flow curve, three interval thixotrophic test (3ITT), oscillatory amplitude sweep and frequency sweep tests were carried out. Yield point and high shear viscosity was correlated with ease of application. Viscosity after recovery and loss factor (Tan ?) was correlated with flow, leveling, sagging and shelf life of the putty fillers. Above results were finally compared with actual application of putty fillers on metal substrate. Note de contenu : - MATERIALS
- METHODS : Physical properties measurement - Application properties measurement - Rheological characterization
- APPLICATIONS PROPERTIES
- RHEOLOGICAL CHARACTERIZATION : Flow curve - Three interval thixotrophic test (3ITT) - Oscillation amplitude sweepPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20326
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Code-barres Cote Support Localisation Section Disponibilité 15932 - Périodique Bibliothèque principale Documentaires Disponible A study of hydroxyethyl galactomannan based rheology modifiers in waterborne paints / Dharmesh Desai in PAINTINDIA, Vol. LIV, N° 2 (02/2004)
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Titre : A study of hydroxyethyl galactomannan based rheology modifiers in waterborne paints Type de document : texte imprimé Auteurs : Dharmesh Desai, Auteur ; V. V. Raghavan, Auteur ; Randhirsinh Parmar, Auteur Année de publication : 2004 Article en page(s) : p. 57-60 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : Guar gum refers to a galactomannan polysaccharide extracted from the seed of cyamopsis tetragonoloba. Hydroxyethyl derivative of Galactomannan *(HEG) are synthesized by the etherification reaction with nonionic ethylene oxide reagent with Galactomannan gum. Such modification greatly improve some specific properties of unmodified Galactomannan like electrolyte compatibility, stability, solubility, and the rheological characteristics in context to their utilization in waterborne paints. In the present study, various grades of HEG were employed to prepare water based paints. The waterbased paints were also prepared from conventional rheology modifiers based on cellulose derivatives. The comparative study of these reveals very interesting findings in HEG based paints compositions. Note de contenu : - Rheology modifiers for waterbased paints
- Preparation of distempers, plastic emulsion paint (interior) and exterior house paint
- Characterization of distemper, plastic emulsion paint and exterior house paint
Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12048
in PAINTINDIA > Vol. LIV, N° 2 (02/2004) . - p. 57-60[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 000450 - Périodique Bibliothèque principale Documentaires Disponible