HYDROPHOBIC MINERAL OIL BASED FILLING COMPOSITIONS FOR CABLE SPLICE CASES

摘要

Hydrophobic filling compositions (3) comprise a mineral oil and a hydrophobic fumed silica, and optionally other additives such as a depolymerized butyl rubber, a microcrystalline wax or hydrophobic glass microspheres. The compositions have a very low water content, a good thermal stability to phase separation of oil and an unexpectedly improved water-excluding capability. These hydrophobic filling compositions have excellent electrical properties and are particularly useful as water-excluding filling compounds for splice cases, sealing connections between telecommunication cables.