Insulating composition for an electric power cable
US8501864B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 2005 |
| Grant date | Aug 6, 2013 |
| Priority date | — |
| Expiry date | Mar 18, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01B3/447
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention relates to an insulating composition for an electric power cable which comprises a polyolefin, an antioxidant, and a polar copolymer. Further, the present invention relates to an electric power cable comprising an insulating layer including a composition according to the present invention, and to the use of a polar copolymer for improving the storage stability, i.e. reducing the exudation of an antioxidant, in an insulating polymer composition. Thereby, said composition comprises polar monomer units in a comparatively small amount, e.g. in an amount of polar monomer units in the total polymer part of the composition from 1 to 100 micromol (1·10″6 to 100·106 mol) per gram of polymer in addition to an antioxidant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.