Patent ID: 6992126

Claim:
A niobium based coating composition comprising: an epoxy resin for use of the composition at temperatures up to 100° C.; and a pigment including niobium oxide, the niobium oxide having the general formula Nb x O y , wherein x is an integer from 1 to 2 and y is an integer from 1 to 5; the pigment characterized by a fusion point of 1520° C., a density of 4.47 g/cm 3 , 99.4% Nb x O y , up to 10 ppm sulphur, up to 229 ppm iron, less than one ppm lead, and a granulometry between −45 and 5.6 μm; wherein the compatibility between the resin and the pigment is obtained through charges, and the coating is a bi-component coating including a component A and a component B; component A including, by weight, 9.2 to 24.1% of said resin; 30 to 40% of said pigment, 20 to 30% acetone, 2.4% pearly silica, and 1.3% castor oil; component B including, by weight, 70 to 80% polyamide, 5 to 6% amine, and 20 to 30% acetone.