Patent ID: 7989704

Claim:
An electrical insulator comprising: a solid or hollow tube surrounded by an insulating sheath, wherein the insulating sheath is composed of a filled, hardened, flexibilised, hydrophobic cycloaliphatic epoxy resin including a mix of 25 to 75 percent by weight of a mineral filler, a hydrophobic cycloaliphatic epoxy resin and a hardener, wherein the filled, hardened, flexibilised, hydrophobic cycloaliphatic epoxy resin has the following properties: a glass transition temperature of 0 to 50 degrees Celsius; ultimate strength of 14 to 40 megapascals, modulus of elasticity of 200 to 4000 megapascals, elongation at break of 10 to 30 percent, and SHORE A hardness equal to or greater than 98.