Patent · US Expired

Semiconductive polymer compositions

US7767741B2 · kind B2 · utility

3Cited by

2References

21Claims

0Family size

Assignee

Borealis Technology Oy · FI

Inventors

Perry Nylander · Jönköping, SE
Alfred Campus · Eysins, CH
Annika Smedberg · Stenungsund, SE
Karl-Michael Jager · Gothenburg, SE
Ulf Nillson · Stenungsund, SE
Hans Eklind · Stenungsund, SE
Claes Broman · Ödsmål, SE
Wilfried Kalkner · Berlin, DE
Marc Brüggemann · Berlin, DE

Key dates

Filing date	Jun 21, 2005
Grant date	Aug 3, 2010
Priority date	—
Expiry date	Jul 18, 2025

Classification

Technology area (CPC H)Electricity
CPC primaryH01B1/24
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The present invention relates to a semiconductive polymer composition comprising an olefin homo- or copolymer wherein the composition has a direct current volume resistivity of less than 1000 Ohm·cm at 90° C., an elongation at break which after aging for 240 hours at 135° C. does not change by more than 25%, and a total number of structures of 20 or less in the SIED test. Furthermore, the present invention relates to an electric power cable comprising a conductor, a semiconducting layer and, adjacent to the semiconducting layer, an insulation layer, wherein the semiconducting layer is formed by said semiconductive polymer composition and to the use of said semiconducting polymer composition for the production of a semiconductive layer of an electric power cable.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.