Cable comprising crosslinked layer obtained from polymer composition

Patent metadata

Field	Value
Publication number	US-11636959-B2
Application number	US-201916408622-A
Country	US
Kind code	B2
Filing date	May 10, 2019
Priority date	May 10, 2018
Publication date	Apr 25, 2023
Grant date	Apr 25, 2023

Abstract

A cable is provided having at least one elongated conductor surrounded by at least one cross-linked layer, said layer being obtained from a polymer composition comprising a polymer, a crosslinking agent, and an amine as co-crosslinking agent, wherein said amine has a nucleophilic value (N) of 14 or more.

First claim

The invention claimed is:

1. A cable comprising: at least one elongated conductor surrounded by at least one cross-linked layer, said layer being obtained from a polymer composition having a polymer, a crosslinking agent, and an amine as co-crosslinking agent, wherein said amine is a tertiary amine with a nucleophilic value (N) of 16 or more,
wherein the crosslinking agent in the polymer composition is a polycarboxylic acid;
wherein the polymer is [a polymer containing one or several carboxyl group(s) or] a polymer containing one or several epoxy group(s);
wherein the polymer composition comprises the tertiary amine in an amount of from 0.1 parts by weight or more to 1 parts by weight or less, with respect to 100 parts by weight of the polymer; and
wherein the polymer composition comprises the crosslinking agent in an amount of from 0.5 parts by weight or more to 5 parts by weight or less, with respect to 100 parts by weight of the polymer.

2. The cable according to claim 1 , wherein the amine is at least one selected from:
monocyclic or bicyclic amine selected from 1,4-diazabicyclo[2.2.2]octane (DABCO), quinuclidine, piperidine, N-methylpiperidine, pyrrolidine, and N-methylpyrrolidine;
guanidines selected from 1,5,7-Triazabicyclo[4.4.0]dec-5-ene (TBD), and 1,2,3,5,6,7-hexahydroimidazo[1,2-a]pyrimidine (TBN); or
monocyclic or bicyclic amidine bases including 1,5-diazabicyclo[4.3.0]non-5-ene (DBN).

3. The cable according to claim 1 , wherein the polycarboxylic acid is selected from:
a′) aliphatic compounds selected from the group consisting of adipic acid, azelaic acid, citric acid, dodecanoic acid, itaconic acid, malic acid, maleic acid, sebacic acid, succinic acid, succinic anhydride;
b′) cyclic compounds selected from the group consisting of 1,4-cyclohexanedicarboxylic acid, cis-4-cyclohexene-1,2-dicarboxylic acid;
c′) aromatic compounds selected from the group consisting of 1,3,5-benzenetricarboxylic acid, isophthalic acid, phthalic acid, terephthalic acid, trimellitic acid, phthalic anhydride, and trimellitic anhydride;
d′) polymers containing two or more carboxyl groups or maleic anhydrides in main chain, branch or terminal of the polymer and having molecular weight of 10,000 g/mol or less; or
e′) a mixture of two or more selected from said a′) to d′).

4. The cable according to claim 1 , wherein the polymer composition further comprises an organometallic compound.

5. The cable according to claim 4 , wherein said organometallic compound is selected from the group consisting of dibutyltin dilaurate and bismuth-based carboxylate.

6. The cable according to claim 1 , wherein it is an electric power cable.

7. The cable according to claim 1 , wherein said selection of said crosslinking agent and said tertiary amine as co-crosslinking agent results in a crosslinking speed that is faster than using a polyamine as crosslinking agent and an amine having a nucleophilic value more than 16 as co-crosslinking agent or faster than using said crosslinking agent and an amine having a nucleophilic value less than 16 as co-crosslinking agent.

8. The cable according to claim 1 , wherein said selection of said crosslinking agent and said tertiary amine as co-crosslinking agent results in a crosslinking degree that is higher than using a polyamine as crosslinking agent and an amine having a nucleophilic value more than 16 as co-crosslinking agent or higher than using said crosslinking agent and an amine having a nucleophilic value less than 16 as co-crosslinking agent.

9. The cable according to claim 1 , wherein said at least one cross-linked layer is used as any one of an insulating layer, a semi-conductive layer, and a coating or sheath layer in said cable, said at least one cross-linked layer being halogen free.

10. The cable according to claim 1 , wherein the polymer has a molecular weight of greater than 5,000 g/mol.

11. The cable according to claim 1 , wherein the polymer has a molecular weight of 1,000,000 g/mol or less.

12. The cable according to claim 1 , wherein said polymer containing one or several epoxy group(s) contains from 0.1% by weight or more to 30% by weight or less, based on the total weight of the polymer, of repeating units comprising said epoxy groups.

13. The cable according to claim 1 , wherein said tertiary amine is bicyclic.

Assignees

• Nexans

Inventors

• Ahn Dae-Up
• Bae Jun-Huei
• Lim Jong-Chan

Classifications

• C08K5/1515

  Three-membered rings · CPC title

• C08L2203/202

  use in electrical wires or wirecoating · CPC title

• H01B3/425

  Non-saturated polyesters derived from polycarboxylic acids and polyhydroxy compounds, in which at least one of the two components contains aliphatic unsaturation · CPC title

• C08L23/0853

  Ethylene vinyl acetate copolymers · CPC title

• H01B3/441 Primary

  from alkenes · CPC title