Cable

Patent metadata

Field	Value
Publication number	US-2024425687-A1
Application number	US-202218698528-A
Country	US
Kind code	A1
Filing date	Oct 5, 2022
Priority date	Oct 5, 2021
Publication date	Dec 26, 2024
Grant date	—

Abstract

The invention provides a cable, preferably a power cable, comprising one or more conductors surrounded by at least one layer, preferably an insulation layer, wherein said layer comprises a polymer composition comprising: (i) at least 75 wt % of an ethylene based plastomer; and (ii) 0.2 to 10 wt % of an amine filler, oxide filler or mixture thereof; and wherein said polymer composition has a dielectric loss expressed as tan δ (50 Hz) of 200×10 −4 or less, when measured at 500 V/mm and 90° C. as described in the description part under “Determination methods”.

First claim

1 . A cable comprising one or more conductors surrounded by at least one layer, wherein said layer comprises a polymer composition comprising:
at least 75 wt % of an ethylene based plastomer; and 0.2 to 10 wt % of an amine filler, an oxide filler, or mixtures thereof, and wherein said polymer composition has a dielectric loss expressed as tan δ (50 Hz) of 200×10 −4 or less, when measured at 500 V/mm and 90° C. as described in the description part under “Determination methods”.

2 . A cable comprising one or more conductors surrounded by at least one layer wherein said layer comprises a polymer composition comprising:
(i) 5 to 50 wt % of an ethylene based plastomer; and (ii) 50 to 95 wt % of a polyolefin (a) selected from the group consisting of an LDPE, polypropylene homopolymer, random heterophasic polypropylene copolymer and mixtures thereof; and wherein said polymer composition has a dielectric loss expressed as tan δ (50 Hz) of 200×10 −4 or less, when measured at 500 V/mm and 90° C. as described in the description part under “Determination methods”.

3 . The cable of claim 2 , wherein the polymer composition further comprises
(iii) 0.2 to 10 wt % of an amine filler, oxide filler, or mixtures thereof; and wherein said polymer composition has a dielectric loss expressed as tan δ (50 Hz) of 50×10 −4 or less, when measured at 500 V/mm and 90° C. as described in the description part under “Determination methods”.

4 . The cable as claimed in claim 1 , wherein said ethylene based plastomer is an ethylene copolymer with one or more alpha-olefin comonomers.

5 . The cable as claimed in claim 1 , wherein said amine filler, oxide filler or mixture thereof is present in an amount of 0.5 to 8.0 wt %, relative to the weight of the polymer composition as a whole.

6 . The cable as claimed in claim 1 , wherein said amine filler is a derivative of cyanamide.

7 . The cable as claimed in claim 1 , wherein said oxide filler is a metal or metalloid oxide.

8 . The cable as claimed in claim 1 , wherein said oxide filler has:
a specific surface area (BET) of 50 to 600 m 2 /g, when measured as described in the description part under “Determination methods”; an average particle size of 5 to 50 nm, when measured as described in the description part under “Determination methods”; a tamped density of 25 to 100 g/l, when measured as described in the description part under “Determination methods”; or a combination thereof.

9 . The cable as claimed in claim 2 , wherein the ethylene based plastomer is present in an amount of 10 to 40 wt %, relative to the weight of the polymer composition as a whole.

10 . The cable as claimed in claim 2 , wherein said polyolefin (a) is present in an amount of 60 to 90 wt %, relative to the weight of the polymer composition as a whole.

11 . The cable as claimed in claim 2 , wherein the LDPE is an LDPE homopolymer or copolymer.

12 . The cable as claimed in claim 2 , wherein the polypropylene homopolymer is an isotactic polypropylene homopolymer.

13 . The cable as claimed in claim 2 , wherein the random heterophasic polypropylene copolymer comprises 50 to 90 wt % of a propylene copolymer rubber component and 10 to 50 wt % of a propylene homopolymer or copolymer matrix component.

14 . The cable as claimed in claim 1 , wherein said polymer composition is crosslinked in the presence of a crosslinking agent.

15 . A process for producing the cable as claimed in claim 1 , the process comprising the steps of: applying on one or more conductors, the layer comprising the polymer composition.

16 . The cable as claimed in claim 2 , wherein said ethylene based plastomer is an ethylene copolymer with one or more alpha-olefin comonomers.

17 . The cable as claimed in claim 3 , wherein said amine filler, oxide filler or mixture thereof is present in an amount of 0.5 to 8.0 wt %, relative to the weight of the polymer composition as a whole.

18 . The cable as claimed in claim 3 , wherein said amine filler is a derivative of cyanamide.

19 . The cable as claimed in claim 3 , wherein said oxide filler is a metal or metalloid oxide.

20 . The cable as claimed in claim 3 , wherein said oxide filler has:
a specific surface area (BET) of 50 to 600 m 2 /g, when measured as described in the description part under “Determination methods”; an average particle size of 5 to 50 nm, when measured as described in the description part under “Determination methods”; a tamped density of 25 to 100 g/l, when measured as described in the description part under “Determination methods”; or a combination thereof.

21 . The cable as claimed in claim 2 , wherein said polymer composition is crosslinked in the presence of a crosslinking agent.

22 . A process for producing the cable as claimed in claim 2 , the process comprising the steps of: applying on one or more conductors, the layer comprising the polymer composition.

Assignees

• Borealis Ag

Inventors

• Nilsson Susanne
• Cheng Joy Jie
• Prades Floran Régis
• Gitsas Antonios

Classifications

• H01B3/441 Primary

  from alkenes · CPC title

• C08L2312/00

  Crosslinking · CPC title

• C08L2207/066

  LDPE (radical process) · CPC title

• C08L2203/206

  use in coating or encapsulating of electronic parts · CPC title

• C08L23/14

  Copolymers of propene (C08L23/16 takes precedence) · CPC title