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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Natural developments / V. Patel in EUROPEAN COATINGS JOURNAL (ECJ), N° 3/2009 (03/2009)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 3/2009 (03/2009) . - p. 80-85 Titre : Natural developments : soybean phosphate esters produce metal coatings with good performance Type de document : texte imprimé Auteurs : V. Patel, Auteur ; Mehul Patel, Auteur ; Jignesh T. Patel, Auteur ; Jayant S. Parmar, Auteur Année de publication : 2009 Article en page(s) : p. 80-85 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adhésion Esters Formulation (Génie chimique) Huile de soja Métaux -- Revêtements:Métaux -- Peinture Phosphates Revêtements:Peinture Index. décimale : 667.9 Revêtements et enduits Résumé : Soybean oil phosphate ester (SOPEPs) having varying hydroxyl values and viscosity were prepared and used in the synthesis of high-solids air-drying polyurethane coatings. The coatings showed excellent adhesion to metal. Other properties could be varied across a wide range by changing the formulation. En ligne : https://drive.google.com/file/d/1HotTyZPXYhfWDj9dIhK5nxv7jPMuYELM/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4318 [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, characterization and optimization of epoxy-acrylic graft copolymer dispersions for waterborne industrial coatings / Randhir J. Parmar in PAINTINDIA, Vol. LIII, N° 12 (12/2003)

[article]  inPAINTINDIA > Vol. LIII, N° 12 (12/2003) . - p. 31-40 Titre : Synthesis, characterization and optimization of epoxy-acrylic graft copolymer dispersions for waterborne industrial coatings Type de document : texte imprimé Auteurs : Randhir J. Parmar, Auteur ; Niranjan V. Patel, Auteur ; Jayant S. Parmar, Auteur Année de publication : 2003 Article en page(s) : p. 31-40 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : Volatile organic compounds (VOCs) are a major concern in the environmental pollution by organic solvents used in paint industry. The current trend is towards eco-friendly coatings like water borne coatings. The present work focusses on the method of preparing the Epoxy-Acrylic graft copolymer dispersions. The various experimental sets were prepared by varying the reaction parameters as well as compositions. The EAGDs were then characterized for their physico-chemical characteristics like nonvolatile content, water compatibility, viscosity, particle size, shelf stability as well as the instrumental methods viz. GPC (molecular weight), IR-Spectra and DSC where also employed for the analysis. Thus the optimization was carried out for the EAGDs to be used for the water borne industrial coatings. Note de contenu : - Experimental : - Materials - Preparation of epoxy-acrylic graft copolymer based waterborne dispersions (EAGDs) - Characterization of EAGDs - Result and discussions : - Non-volatile contents (solids) – Compatibility with water – Clarity (visual) – Acid value – Viscosity by Brookfield viscometer – Particle size – Infrared spectral studies – Number (Mn) and weight average (Mw) molecular weight – Thermal analysis by DSC – Shelf life Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12203 [article]

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