Shalimar Paints Ltd

Nāsik, India

Shalimar Paints Ltd

Nāsik, India
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Rajesh Kumar K.,Shalimar Paints Ltd | Ghosh S.K.,Nova Surface Care Center Pvt. Ltd. | Khanna A.S.,Indian Institute of Technology Bombay | Waghoo G.,Shalimar Paints Ltd | And 2 more authors.
Dyes and Pigments | Year: 2012

The present study reports chemical treatment of pigment titanium dioxide (TiO 2) with silicone to give surface functionalized TiO 2. The surface functionalization was confirmed by Fourier Transform Infra Red Spectroscopy, Scanning Electron Microscopy, Transition Electron Microscopy and Dynamic Light Scattering analysis. Coatings were formulated by incorporation of these functionalized TiO 2 into the epoxy polymer matrix and compared for coating properties with untreated TiO 2. The effect of the functionalized TiO 2 on various coating properties with respect to physico-mechanical properties, anticorrosion efficiencies, UV resistance and chemical resistance was studied in detail. The results revealed remarkable enhancement of coating properties with functionalized TiO 2 when compared with the coatings formulated with untreated TiO 2. © 2012 Elsevier Ltd. All rights reserved.


Ghosh S.K.,Shalimar Paints Ltd | Waghoo G.,Shalimar Paints Ltd | Khanna A.S.,Indian Institute of Technology Bombay | Kumar K.R.,Shalimar Paints Ltd | And 3 more authors.
Progress in Organic Coatings | Year: 2012

The present study reports surface modification of extender calcite with silicone to give surface functionalized calcite. The surface modification was confirmed by Fourier transform infrared spectroscopy, scanning electron microscopy and dynamic light scattering analysis. Coatings were formulated by incorporation of this functionalized calcite into the epoxy polymer matrix and compared for coating properties with untreated calcite. The effect of the functionalized calcite on various coating properties with respect to physico-mechanical properties, anticorrosion efficiencies, UV resistance and chemical resistance were studied in detail. The results revealed remarkable enhancement of coating properties with functionalized calcite when compared with the coatings formulated with untreated calcite. © 2012 Elsevier B.V. All rights reserved.


Ghosh S.K.,Shalimar Paints Ltd | Waghoo G.,Shalimar Paints Ltd | Kalita A.,Shalimar Paints Ltd | Balgude D.,Shalimar Paints Ltd | Kumar K.R.,Shalimar Paints Ltd
Progress in Organic Coatings | Year: 2012

Partially hydrolyzed ethyl silicate has widely been used as a binder to formulate inorganic zinc silicate paint for anticorrosive coating applications. Hydrochloric acid is used most popularly to catalyze the hydrolysis of ethyl silicate. Although different acids have been tried as catalysts for ethyl silicate hydrolysis, no attempt has been made to make stable paints out of those hydrolyzed silicate binders. In this study, environment benign biodegradable organic acids such as oxalic acid, citric acid, lactic acid and acetic acid were used for the hydrolysis of ethyl silicate and compared with the hydrolysis using conventional hydrochloric acid. The hydrolyzed silicate sols were pigmented further with silica powder and evaluated for their stability. Of the various organic acids catalyst used, only oxalic acid catalyzed sol acted as a stable binder system. The pigmented binder was then mixed with metallic zinc to formulate anticorrosive inorganic zinc silicate paint. The resultant coatings were characterized for various physical, surface, mechanical and chemical resistance properties such as drying, hardness, adhesion (cross hatch) and solvent resistance. Corrosion resistance properties were analyzed by means of salt spray, open circuit potential (OCP) and electrochemical impedance spectroscopy (EIS). The results revealed that the physical, mechanical, chemical and anticorrosive properties of the coating hydrolyzed with hydrochloric acid and oxalic acid are comparable. Thus, a chloride free biodegradable organic acid hydrolyzed inorganic zinc silicate primer is reported and due to its long term stability same also can be scaled up commercially. © 2011 Elsevier B.V. All rights reserved.


Kathalewar M.,Institute of Chemical Technology | Sabnis A.,Institute of Chemical Technology | Waghoo G.,Shalimar Paints Ltd.
Progress in Organic Coatings | Year: 2013

Non-isocyanate polyurethanes (NIPUs) based on cyclic carbonate-amine chemistry are an emerging area for polymer synthesis and is being extensively studied for various applications. A successful utilization of this technology can eliminate many of the issues associated with conventional polyurethane chemistry. While these polymers have not yet achieved commercial significance, research is being devoted to methods for synthesizing polymers or oligomers containing cyclic carbonate groups as well as studying their applications in thermoplastic and thermosetting systems. Nevertheless, NIPU based coating systems are still unexplored for corrosion protection of metals. In the current study, zinc oxide (ZnO) particles prepared via in situ method were treated with cyclic carbonate functional alkoxy silane. The surface treatment of ZnO particles was confirmed by particle size analysis, Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDAX) and X-Ray Diffraction Spectroscopy (XRD). NIPU formulations with variable proportion of treated and untreated ZnO particles were prepared using cyclic carbonate modified epoxy resin and coated on mild steel substrates. The nano-composite coatings prepared thereof were evaluated for their mechanical and chemical performance. The anticorrosive performance was evaluated by salt spray test and electrochemical impedance spectroscopy (EIS). The study conducted showed significant enhancement in scratch hardness and abrasion resistance along with improvement in other performance properties after addition of treated ZnO particles in nano-composite coating formulations. © 2013 Elsevier B.V. All rights reserved.

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