| abstract |
The present invention relates to a polyurethane based coating composition which exhibits superior properties in terms of stability, corrosion resistance and moisture permeability and which has low viscosity of the coating composition. The polyurethane based coating composition comprises a base and an activator the base component comprising a polyol, a filler, a defoamer, a catalyst and a molecular sieve and the activator comprises polyisocyanate. Preferably the polyol comprises castor polyol, 2-methyl 1, 3 dipropane diol or 1, 4 butane diol and the filler comprises mica. Mica besides being a filler also functions as a pigment extender. In some embodiments the said composition is devoid of catalyst. The said coating composition is useful in coating concrete and metal surfaces. |