PROCESS FOR THE MANUFACTURE OF INSULATING COMPOUNDS REINFORCED WITH NANOPARTICLES WITH HIGHER RESISTANCE TO EROSION AND CARBONIZATION APPLIED IN ENVIRONMENTS OF HIGH POLLUTION AND RESULTING COMPOUND.

摘要

A process and composition for the manufacture of an insulating dielectric compound reinforced with nanoparticles useful in inner and outer insulation and insulating pieces or parts of equipments subjected to polluting environmental conditions. The matrix is made of high temperature vulcanization (HTV) silicon, including, as reinforce material, the combination of microparticles, nanoparticles and a commercial dispersant or surfactant for increasing the surface tension and improving the dispersion of nanoparticles. The increase of the surface tension in the nanoparticles may reduce agglomeration and therefore being easier to separate nanoparticles during the mixture, thus achieving a better dispersion. A coupling agent of the organosilane type and a crosslinked initiator are included. This combination of particles provides a higher resistance against carbonization and erosion to insulating materials, since there is a large amount of interactions between the larger surface area and silan ole groups in the nanoparticles, unlike traditional formulations with microparticles. The nano-micro compound insulating material is evaluated in the tilted plane according to the ASTM D2303 standard, resisting a test voltage of from about 7 kV to about 8 kV at 12 ml/min of polluting liquid. The insulating nanocompound has improved properties of resistance to tracking and erosion, thus being used as external or internal electric insulators, either in electric power lines or substations where the preventive maintenance caused by pollution is to be eliminated.