Patent ID: 8545977

Claim:
Polymer concrete electrical insulation, comprising: a hardened epoxy resin composition based on a cycloaliphatic epoxy resin and filled with about 76% by weight to about 86% by weight, based on the total weight of the polymer concrete electrical insulation, of (c) an electrically non-conductive inorganic filler composition, said (c) electrically non-conductive inorganic filler composition comprising a uniform mixture of c(i) an inorganic filler with an average grain size of 1 micron (μm) to 100 micron (μm) and c(ii) an inorganic filler with an average grain size of 0.7 mm (700 micron) to 2 mm; wherein c(i) is present in an amount of 22% to 42% by weight, based on the total weight of the polymer concrete electrical insulation; and c(ii) is present in an amount of 41% to 61% by weight, based on the total weight of the polymer concrete electrical insulation.