Electrical cable including a crosslinked layer

Patent metadata

Field	Value
Publication number	US-2017194075-A1
Application number	US-201515312953-A
Country	US
Kind code	A1
Filing date	Apr 10, 2015
Priority date	May 20, 2014
Publication date	Jul 6, 2017
Grant date	—

Abstract

An electrical cable ( 1 ) includes an elongate electrical conductor ( 2 ) surrounded by at least one crosslinked layer ( 3, 4, 5 ) obtained from a polymer composition including a polymer material and a protection system. The protection system includes diphenylamine or a diphenylamine derivative and a sulfur compound selected among an organic thiol, a thiolate, and one of the mixtures thereof.

First claim

1 . An electric cable comprising:
an elongated electrical conductor surrounded by at least one crosslinked layer obtained from a polymer composition comprising a polymer material and a protective system, wherein said protective system has:
diphenylamine or a diphenylamine derivative, and
a sulfur-comprising compound chosen from an organic thiol, a thiolate and one of their mixtures.

2 . The cable as claimed in claim 1 , wherein the diphenylamine derivative is chosen from ocylated diphenylamine (ODPA), styrenated diphenylamine (SDPA) and one of their mixtures.

3 . The cable as claimed in claim 1 , wherein the sulfur-comprising compound is an organic monothiol.

4 . The cable as claimed in claim 1 , the sulfur-comprising compound is a benzimidazole derivative.

5 . The cable as claimed in claim 1 , wherein the sulfur-comprising compound is chosen from mercaptobenzimidazoles and their derivatives.

6 . The cable as claimed in claim 5 , wherein the mercaptobenzimidazoles or their derivatives are chosen from 2-mercaptobenzimidazole (MBI), the methylated derivatives of 2-mercaptobenzimidazole (MMBI) and one of their mixtures.

7 . The cable as claimed in claim 1 , wherein the polymer composition comprises from 0.1 to 5.0 parts by weight of diphenylamine or of diphenylamine derivative per 100 parts by weight of polymer material.

8 . The cable as claimed in claim 1 , wherein the polymer composition comprises from 0.1 to 5.0 parts by weight of sulfur-comprising compound per 100 parts by weight of polymer material.

9 . The cable as claimed in claim 1 , wherein the polymer material comprises one or more olefin polymers, preferably one or more ethylene polymers.

10 . The cable as claimed in claim 1 , wherein the polymer material comprises more than 30% by weight of olefin polymer(s) and preferably more than 50% by weight of olefin polymer(s), with respect to the total weight of polymer material in the polymer composition.

11 . The cable as claimed in claim 1 , wherein the polymer material comprises a copolymer of ethylene and of octene (PEO) and an ethylene-propylene-diene monomer terpolymer (EPDM).

12 . The cable as claimed in claim 11 , wherein the polymer material comprises from 60 to 90% by weight of PEO and from 10 to 40% by weight of EPDM, with respect to the total weight of the polymer material in the polymer composition.

13 . The cable as claimed in claim 1 , wherein additionally comprises a metal oxide.

14 . The cable as claimed in claim 13 , wherein the metal oxide is zinc oxide (ZnO).

15 . The cable as claimed in claim 13 , wherein the polymer composition comprises from 1.0 to 10.0 parts by weight of metal oxide per 100 parts by weight of polymer material.

16 . The cable as claimed in claim 1 , wherein said cable additionally comprises a crosslinking agent.

17 . The cable as claimed in claim 16 , wherein the crosslinking agent is an organic peroxide.

18 . The cable as claimed in claim 1 , wherein the polymer composition comprises less than 3% by weight of lead oxide, with respect to the total weight of the polymer composition.

19 . The cable as claimed in claim 1 , wherein the polymer composition comprises more than 30% by weight of polymer material and preferably more than 50% by weight of polymer material, with respect to the total weight of the polymer composition.

20 . The cable as claimed in claim 1 , wherein the polymer composition does not comprise halogenated polymer.

21 . The cable as claimed in claim 1 , wherein the polymer composition does not comprise polyorganosiloxane.

22 . The cable as claimed in claim 1 , wherein the crosslinked layer is an extruded layer.

23 . The cable as claimed in claim 1 , wherein the crosslinked layer is a layer directly in physical contact with the elongated electrical conductor.

24 . The cable as claimed in claim 1 , wherein comprises a first semiconducting layer ( 3 ) surrounding the elongated electrical conductor ( 2 ), an electrically insulating layer ( 4 ) surrounding the first semiconducting layer ( 3 ) and a second semiconducting layer ( 5 ) surrounding the electrically insulating layer ( 4 ), the crosslinked layer being at least one of these three layers.

25 . The cable as claimed in claim 1 , wherein the crosslinked layer is an electrically insulating layer.

26 . A process for the manufacture of a cable as claimed in claim 1 , wherein said process comprises the following stages:
i. extruding the polymer composition around an elongated electrical conductor, in order to obtain an extruded layer, and ii. crosslinking the extruded layer of stage i.

Assignees

• Nexans

Inventors

• Roos Andreas
• Dalbe Bernard
• Larche Jean-François

Classifications

• C08K5/378

  containing heterocyclic rings · CPC title

• Y02A30/14

  Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables · CPC title

• H01B13/14

  by extrusion {(extrusion in general B29C48/00)} · CPC title

• H01B3/441 Primary

  from alkenes · CPC title

• C08L23/16

  Ethylene-propylene or ethylene-propylene-diene copolymers · CPC title