Air-drying high solids green coatings / Syed Haseebuddin in PAINTINDIA, Vol. LIX, N° 11 (11/2009)

[article]  inPAINTINDIA > Vol. LIX, N° 11 (11/2009) . - p. 61-76 Titre : Air-drying high solids green coatings Type de document : texte imprimé Auteurs : Syed Haseebuddin, Auteur ; Kumar Ghosh Swapan, Auteur ; Gulzar Waghoo, Auteur ; Randhir Parmar, Auteur ; Vaibhav Dave, Auteur ; Harshal Navghare, Auteur Année de publication : 2009 Article en page(s) : p. 61-76 Note générale : Bibliogr. Langues : Anglais (eng) Tags : Résines  alkyd  Polymères  branches  vertes  Enduits  verts  Dipentaerythritol  Dessication  air  Résistance  corrosion  Brillant  Faibles  COV Index. décimale : 667.9 Revêtements et enduits Résumé : Green coatings have become the core research area ot the scientists to address the issues of the environment health and safety. A series of high solid alkyd polymers from soya and dehydrated castor oil fatty acid (SOFA and DCOFA respectively) combination with varying percentage of Dipentaerythritol (DPE ; a hexa-functional polyol), have been synthesized and characterized for their physico chemical, optical, thermal and mechanical properties. For the study purpose the polymers were prepared at 80 % solids keeping the oil length constant. The curing behaviour of the alkyds was studied using FT-IR and DSC. Increasing DPE content in resin backbone was found to increase gloss and hardness.The gloss improvement was also supported well by AFM pictures. Results of 500 hours of QUV exposure revealed higher gloss retention for DP based systems. When compared for the anticorrosive properties, the EIS spectrum reveals that alkyd film containing 100 % DPE has the higher value of impedance. The overall performance of the DPE based system reveals the excellent combination of green aspects with improved coatings which is the need of the day. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8324 [article]

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A comparative study of waterborne epoxy-acrylic graft copolymer dispersion based coatings and solvent based coatings for can coating applications / Randhir Parmar in PAINTINDIA, Vol. LIV, N° 3 (03/2004)

[article]  inPAINTINDIA > Vol. LIV, N° 3 (03/2004) . - p. 51-64 Titre : A comparative study of waterborne epoxy-acrylic graft copolymer dispersion based coatings and solvent based coatings for can coating applications Type de document : texte imprimé Auteurs : Randhir Parmar, Auteur ; Ashok Dighe, Auteur ; Niranjan V. Patel, Auteur ; Jayant S. Parmar, Auteur Année de publication : 2004 Article en page(s) : p. 51-64 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : Epoxy-Acrylic Graft copolymer Dispersions (EAGDs) were prepared from various grades of Epoxies by grafting Acrylic monomers on it including methacrylic acid to render water compatibility after neutralisation with tertiaryamine. The waterborne can coating compositions were prepared by varying the type ofEAGDs and amount of curing agent, hexamethoxy methyl melamine (HMMM). These compositions were evaluated for their various physico-chemical characteristics and film properties after curing at 200°C for 15 minutes. The conventional Epoxy-phenolic solvent based can coating compositions were also similarly characterised for their performance properties and for the comparison purpose. The study revealed the excellent performance of certain EAGD based waterborne coatings compared to the conventional solvent based can coatings. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12041 [article]

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Grafting epoxy resins / Randhir Parmar in EUROPEAN COATINGS JOURNAL (ECJ), N° 12/2004 (12/2004)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 12/2004 (12/2004) . - p. 32-37 Titre : Grafting epoxy resins Type de document : texte imprimé Auteurs : Randhir Parmar, Auteur ; Kalpesh Patel, Auteur ; Niranjan Patel, Auteur ; Jayant S. Parmar, Auteur Année de publication : 2004 Article en page(s) : p. 32-37 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : Waterborne coatings - Waterbornes industrial coatings are the key area of interest for researchers because of industrial pollution, industrial safety and stringent legislations. Epoxy resins of higher molecular weight were grafted with acrylic monomers, neutralized and reacted with N-butoxymethacrylamide to generate curing site on its backbone and give water compatibility. Sets of self-curing coating composition were prepared and their physico-chemical charactéristics such as particle size and viscosity were measured. The performance properties of the cured films reveal their potential applications as high performance coating binders for waterborne coatings. En ligne : https://drive.google.com/file/d/1qWaWY_Z9WHBrFVCOlWAgbW8-jMKLnmZg/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9026 [article]

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Nano-technology enabled advanced self cleaning façade coatings / Atul Navale in PAINTINDIA, Vol. LXIII, N° 12 (12/2013)  

[article]  inPAINTINDIA > Vol. LXIII, N° 12 (12/2013) . - p. 53-58 Titre : Nano-technology enabled advanced self cleaning façade coatings Type de document : texte imprimé Auteurs : Atul Navale, Auteur ; Randhir Parmar, Auteur Année de publication : 2013 Article en page(s) : p. 53-58 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dioxyde de silicium Dioxyde de titane Hydrophilie Imperméabilisation Latex Matériaux hybrides Nanotechnologie Polyméthacrylate de méthyle Le poly(méthacrylate de méthyle) (souvent abrégé en PMMA, de l'anglais Poly(methyl methacrylate)) est un polymère thermoplastique transparent obtenu par polyaddition dont le monomère est le méthacrylate de méthyle (MMA). Ce polymère est plus connu sous son premier nom commercial de Plexiglas (nom déposé), même si le leader global du PMMA est Altuglas International9 du groupe Arkema, sous le nom commercial Altuglas. Il est également vendu sous les noms commerciaux Lucite, Crystalite, Perspex ou Nudec. Revêtement auto-nettoyant:Peinture auto-nettoyante Index. décimale : 667.9 Revêtements et enduits Résumé : In recent years, there has been a considerable amount of work on the development of contamination resistant coatings. Key advances in the understanding and fabrication of surfaces with controlled wetting properties has a major role to play in creating contamination-free or easy to clean surfaces. Two principal ways are at our disposal to understand surface of self cleaning materials which work by the removal of dirt by either film or droplet flow. When it comes to protecting building facades from the possible contaminants such as dirt, exhaust fumes containing oily components, minimal spotting or streaking and good weathering resistance self cleaning hydrophilic coatings comes into the picture. Self cleaning nanocoatings use the advantages of Ti02's superhydrophilic behavior and then reduces dirt pick up and improves cleanability. This paper describes the preparation, characterization & uses of organic-inorganic hybrid nanocoatings using Ti02 & SiO2 nanoparticles. Note de contenu : - Dirt and water-repellent "easy-to-clean" surfaces blessed by nanotechnology - Self-cleaning through photocatalytic nanotitanium dioxide (TiO2) - Mechanism of photo-induced hydrophilicity - Methods for preparing nanotechnology enabled coatings - Self cleaning through nanocomposite based on SiO2 - Characterization of silica/PMMA nanocomposite latexes En ligne : https://drive.google.com/file/d/1SgWC1JKUfjQFGXUrdMjPrvoxcOwNq760/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20344 [article]

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Novel acrylamide based curing agents for water borne coatings / Niranjan Patel in PAINTINDIA, Vol. LIV, N° 7 (07/2004)

[article]  inPAINTINDIA > Vol. LIV, N° 7 (07/2004) . - p. 73-84 Titre : Novel acrylamide based curing agents for water borne coatings Type de document : texte imprimé Auteurs : Niranjan Patel, Auteur ; Randhir Parmar, Auteur ; Tushar P. Patel, Auteur ; Jayant S. Parmar, Auteur Année de publication : 2004 Article en page(s) : p. 73-84 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : The water-borne acrylamide based curing agents (WACAs) were synthesized using various proportions of methylmethacrylate (MMA), formaldehyde and methanol. These curing agents were blended with water borne hydroxyl functional acrylic resins (WHFAC) and the resulting compositions were applied on test panels. The coating compositions were also made from conventional hexamethoxy methyl melamine (HMMM) resin for comparison study. All the coated panels were stored at 150°C for 15 mins. The WACAs were characterized for their physical properties, IR-spectra and molecular weight by GPC. The coated films were also characterized for their mechanical properties, chemical, solvent, and water resistance and for thermal properties by TGA and DSC. The results indicate that comparable coating performance is achieved for some of the coating compositions under study. Note de contenu : EXPERIMENTAL: Material and methods- Synthesis of waterborne acrylamide based curing agent (WACA) - Structure and characterization of WACA - Preparation and application of the coating compositions - Coated film characterization RESULTS AND DISCUSSION: IR spectra - TGA study - DSC study - Adhesion and flexibility - Impact resistance - Scratch hardness - Chemical resistance and solvent resistance - Hot water and salt water immersion resistance Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11991 [article]

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Synthesis of polymeric dispersants from renewable DCO fatty acid and their multifunctional behavior in waterborne flat paint / Ravi Dara in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 6, N° 4 (12/2009)  

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