Melamine Polyimide Composite Fire Resistant Intumescent Coatings

Satish Chandra Gupta; Abhishek Shivhare; Dheerender Singh; Sandhya Gupta

doi:10.14429/dsj.63.4871

Satish Chandra Gupta Armament Research & Development Establishment, Pune
Abhishek Shivhare Defence Institute of Advanced Technology, Pune
Dheerender Singh Defence Institute of Advanced Technology, Pune
Sandhya Gupta JNV University, Jodhpur

DOI: https://doi.org/10.14429/dsj.63.4871

Keywords: Bismellitimide carbonyl chloride biphenyl ether prepolymer, intumescent composite, poly bismellitimide melamide

Abstract

Components of intumescent coatings acid source, carbon source and blowing agent like melamine linked together by a binder provide cumulative fire retardant properties. When temperature of the coating surface reaches a critical temperature under the heat of flame, the surface begins to melt and is converted into highly viscous liquid. Simultaneously, reactions are initiated that result in the release of inert gases with low thermal conductivity. These gases are trapped inside the viscous fluid forming insulating char. The special composite of melamine polyimide, a C source and melamine a blowing agent showed high performance heat resistance in the present study. Polyimides have excellent heat and chemical resistance, excellent adhesion to a number of substrates and superior mechanical properties, such as high flexural modulus and compressive strength. Polyimides are also known to possess outstanding dimensional stability under loads, which allows their use in high temperature environments. Effect of the monomer on chemical reactivity between the binder and the intumescent additives has been studied by thermo-gravimetric analysis, differential scanning calorimeter and FTIR analysis. Thermal insulation studies by various intumescent composite coatings, applied on aluminium plates provided useful time temperature profiles.

Defence Science Journal, 2013, 63(4), pp.442-446, DOI:http://dx.doi.org/10.14429/dsj.63.4871

Author Biographies

Satish Chandra Gupta, Armament Research & Development Establishment, Pune

Dr Satish Chandra Gupta received PhD (Polymer Chemistry) from Jodhpur University in 1989 and MBA (R&D Technology Management) in 2001 from Bharathiar University. Presently, working as Scientist E at ARDE, Pune. He has a research experience of twenty-five years in the field of polymer chemistry, conducting polymers for microwave absorption, corrosion resistance, thermoplastic and thermoset Resins. He has filed five patent applications. Patent No. 254417 granted on MF-OCC polymer cement composite for hovercraft landing platform. He is a fellow member of Indian Association for Radiation Protection, Academic Staff College of India and American Chemical Society.

Abhishek Shivhare, Defence Institute of Advanced Technology, Pune

Dr Sandhya Gupta is a Technical Associate in Polymer Science, University of Pune, Pune. She received PhD (Polymer Chemistry) from Jodhpur University in 2010. She worked in the field of ion exchange resins to remove trace metal ions and radioisotopes from aqueous solutions, polymer composites for EMI shielding and microwave absorption. She is engaged in R&D work on ablative composites for metal structure to prevent kinetic heating.