Global Patent Index - EP 1042759 A1

EP 1042759 A1 2000-10-11 - A DIELECTRIC GELLING COMPOSITION, A METHOD OF MANUFACTURING SUCH A DIELECTRIC GELLING COMPOSITION AND AN ELECTRIC DC-CABLE COMPRISING AN INSULATION SYSTEM IMPREGNATED WITH SUCH A DIELECTRIC GELLING COMPOSITION

Title (en)

A DIELECTRIC GELLING COMPOSITION, A METHOD OF MANUFACTURING SUCH A DIELECTRIC GELLING COMPOSITION AND AN ELECTRIC DC-CABLE COMPRISING AN INSULATION SYSTEM IMPREGNATED WITH SUCH A DIELECTRIC GELLING COMPOSITION

Title (de)

DIELEKTRISCHE GELIERENDE ZUSAMMENSETZUNG, VERFAHREN ZUR HERSTELLUNG SOLCHER DIELEKTRISCHEN GELIERENDEN ZUSAMMENSETZUNG UND ELEKTRISCHES GLEICHSTROMKABEL AUS EINEM ISOLATIONSSYSTEM IMPRÄGNIERT MIT SOLCHER DIELEKTRISCHEN GELIERENDEN ZUSAMMENSETZUNG

Title (fr)

COMPOSITION GELIFIANTE DIELECTRIQUE, SON PROCEDE DE PRODUCTION ET CABLE ELECTRIQUE C.C. COMPORTANT UN SYSTEME D'ISOLATION IMPREGNEE D'UNE TELLE COMPOSITION

Publication

EP 1042759 A1 (EN)

Application

EP 98964595 A

Priority

  • SE 9802311 W
  • SE 9704826 A

Abstract (en)

[origin: WO9933066A1] A dielectric gelling composition, exhibiting a thermo-reversible liquid-gel transition at a transition temperature, Tt, wherein the gel comprises an oil and a gelator with a block copolymer comprising an olefin based block and at least one further block comprising aromatic rings in its backbone structure, wherein each one of the two blocks has a molecular weight of more than 3000 g/mole, and the block with aromatic rings in its backbone structure exhibits a rigid backbone structure and a temperature dependent solubility in the oil, is disclosed. The gelling composition is produced by preparing the block copolymer by means of a condensation reaction and subsequently adding the resulting copolymer to an oil at a temperature above the transition temperature of the gelling composition. The gelling composition is used as an impregnant in an insulated direct current cable having at least one conductor and an impregnated insulation system. The insulation system comprises a solid electrically insulating dielectric part with a porous, fibrous and/or laminated structure impregnated with a dielectric gelling composition.

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

H01B 3/20

IPC 8 full level (invention and additional information)

C09K 3/00 (2006.01); C08L 51/00 (2006.01); C08L 101/00 (2006.01); H01B 3/20 (2006.01); H01B 3/22 (2006.01); H01B 3/44 (2006.01); H01B 9/06 (2006.01); H01B 13/30 (2006.01)

CPC (invention and additional information)

H01B 3/441 (2013.01); H01B 3/20 (2013.01); H01B 3/22 (2013.01)

Citation (search report)

See references of WO 9933066A1

Designated contracting state (EPC)

DE DK ES FI FR GB GR IT NL SE

EPO simple patent family

WO 9933066 A1 19990701; AR 017937 A1 20011024; AU 1988799 A 19990712; AU 737200 B2 20010809; CN 1285076 A 20010221; EP 1042759 A1 20001011; ID 26851 A 20010215; IS 5515 A 20000530; JP 2001527129 A 20011225; NO 20003240 A 20000621; NO 20003240 D0 20000621; SE 511214 C2 19990823; SE 9704826 D0 19971222; SE 9704826 L 19990623; ZA 9811709 B 19990804

INPADOC legal status


2006-01-11 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20050701

2003-11-26 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20031010

2002-04-10 [RIN1] INVENTOR (CORRECTION)

- Inventor name: KORNFELDT, ANNA

2002-04-10 [RIN1] INVENTOR (CORRECTION)

- Inventor name: FELIX, JOHAN

2002-04-10 [RIN1] INVENTOR (CORRECTION)

- Inventor name: BERGKVIST, MIKAEL

2002-04-10 [RIN1] INVENTOR (CORRECTION)

- Inventor name: NORDBERG, PER

2000-10-11 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000628

2000-10-11 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE DK ES FI FR GB GR IT NL SE