SYNTHESIS AND PERFORMANCE STUDY OFNANO-PARTICLES MODIFIED POLYURETHANECOMPOSITE COATINGS

• Main Author: Shambhu Sharan Kumar
• Format: Article
• Language: English
• Published: Yeshwantrao Chavan College of Engineering, India 2018-07-01
• Series: Journal of Research in Engineering and Applied Sciences
• Subjects: nano pigment; nano engineered paint; corrosion protection; weathering resistance; nano-tio; nano-zno; nano-2sio.
• Online Access: http://www.mgijournal.com/Data/Issues_AdminPdf/108/3-Volume%203%20Issue%201%20%20January%202018.pdf

In this industrial extensive research work, study of the synergistic effects of dispersed nano-pigment particles in combination with micron-sized pigment in polyurethane resin matrix has been carried out for the purpose of better corrosion protection and weathering resistance properties of nano-composite coatings. For this purpose, ten types of paint formulations have been done. In first approach, industrial grade micron-sized rutile TiO2 pigment based polyurethane top coat has been synthesized. Further, to improve overall mechanical properties of existing industrial grade coatings, nine types of nano-TiO2, nano-SiO2 and nano-ZnO pigments modified polyurethane super white low-stoving top coats have been formulated for the purpose of comparative study of cured coating-film with respect to the requisite protection of automobile grade steel surfaces. Whether it was the improvement of corrosion resistance, weathering resistance, chemical resistance, water repellency, dispersion stability, surface covering capacity, adhesion property, film smoothness, gloss retention and other mechanical properties; nano materials incorporated paints and coatings have shown greater potential in several industrial applications. Furthermore, performance evaluation of paints and surface coatings was performed as per ASTM/BIS quality test methods; e.g. dry film thickness (DFT) test, gloss test, adhesion test, immersion test, salt spray test, quick ultraviolet (QUV) accelerated weathering resistance test and aging test etc. Subsequent to meticulous test observation, outstanding performance results have been found i.e. 100% adhesion, 99% gloss, 4000 hours passed in salt spray test and 3600 hours passed in QUVweathering test. On the basis of detailed experimentations, it has been proven that the appropriate applications and best possible dispersion of suitable nano pigment particles in superior quality of resins media can produce multi-purpose reinforced polymer-nano-composite coating with a slight technological modification and can improve many properties of paints and composite coatings.