Global Patent Index - EP 1025568 A1

EP 1025568 A1 2000-08-09 - COMPOSITION FOR ELECTRIC CABLES

Title (en)

COMPOSITION FOR ELECTRIC CABLES

Title (de)

ZUSAMMENSETZUNG FÜR ELEKTRISCHE KABEL

Title (fr)

COMPOSITION DESTINEE A DES CABLES ELECTRIQUES

Publication

EP 1025568 A1 (EN)

Application

EP 98951849 A

Priority

  • SE 9801894 W
  • SE 9703844 A

Abstract (en)

[origin: WO9921194A1] A peroxide-cross-linkable ethylene polymer composition for an insulating layer of an electric cable is described. The composition is characterised in that the additives of the composition comprise an N-substituted 2,2,6,6-tetramethylpiperidine compound as an antioxidant and light stabilising agent; and that the composition after 21 days at 135 DEG C has a retained ultimate tensile strength of at least 75 % and a retained ultimate elongation of at least 75 % when tested in accordance with IEC 811. This additive acts as a combined light and thermo-oxidative stabilising agent and inhibits the generation of moisture thereby reducing the risk of water tree formation. Preferably, the composition contains no conventional antioxidants, such as phenolic antioxidants, organic phosphite oxidants and sulphur containing anti-oxidants.

IPC 1-7 (main, further and additional classification)

H01B 3/44; C08K 5/3435; C08L 23/04

IPC 8 full level (invention and additional information)

C08K 5/3435 (2006.01); C08K 5/00 (2006.01); C08K 5/3492 (2006.01); C08L 23/04 (2006.01); H01B 3/44 (2006.01)

CPC (invention and additional information)

H01B 3/441 (2013.01); C08K 5/34926 (2013.01)

Combination set (CPC)

C08K 5/34926 + C08L 23/04

Citation (search report)

See references of WO 9921194A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI NL PT SE

EPO simple patent family

WO 9921194 A1 19990429; WO 9921194 A8 19990624; AU 726326 B2 20001102; AU 9769098 A 19990510; BR 9812937 A 20001121; CA 2306125 A1 19990429; CN 1114928 C 20030716; CN 1276907 A 20001213; EP 1025568 A1 20000809; JP 2001521264 A 20011106; NO 20001913 A 20000412; NO 20001913 D0 20000412; PL 340078 A1 20010115; RU 2191439 C2 20021020; SE 9703844 D0 19971022; TW 589645 B 20040601

INPADOC legal status


2005-01-05 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20040706

2002-09-04 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20020719

2000-08-09 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000327

2000-08-09 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI NL PT SE