Resin composition, resin-coating material, insulated wire, vehicle wire harness, and method of producing insulated wire to be used in vehicle wire harness

Patent metadata

Field	Value
Publication number	US-12441874-B2
Application number	US-202318195148-A
Country	US
Kind code	B2
Filing date	May 9, 2023
Priority date	Nov 30, 2021
Publication date	Oct 14, 2025
Grant date	Oct 14, 2025

Abstract

A resin composition including an ethylene-vinyl acetate copolymer resin as a resin component, an imidazole compound, a phenol compound, and a thioether compound as an antioxidant, and a bromine compound and an antimony compound as a flame retardant. The resin composition has a content of the imidazole compound of 14 to 24 parts by mass, a content of the phenol compound of 1.0 to 2.0 parts by mass, a content of the thioether compound of 0.3 to 0.9 parts by mass, a content of the bromine compound of 15 to 30 parts by mass, and a content of the antimony compound of 5 to 15 parts by mass with respect to 100 parts by mass of a total content of the resin component in the resin composition.

First claim

The invention claimed is:

1. A resin composition, comprising:
an ethylene-vinyl acetate copolymer resin as a resin component;
an imidazole compound, a phenol compound, and a thioether compound as an antioxidant; and
a bromine compound and an antimony compound as a flame retardant, wherein the resin composition has a content of the imidazole compound of 14 to 24 parts by mass, a content of the phenol compound of 1.0 to 2.0 parts by mass, a content of the thioether compound of 0.3 to 0.9 parts by mass, a content of the bromine compound of 15 to 30 parts by mass, and a content of the antimony compound of 5 to 15 parts by mass with respect to 100 parts by mass of a total content of the resin component in the resin composition.

2. The resin composition according to claim 1 , comprising 0.5 to 6.0 parts by mass of a dispersant with respect to 100 parts by mass of the total content of the resin component in the resin composition.

3. The resin composition according to claim 1 , comprising a maleic acid-modified polyethylene resin and/or a low density polyethylene resin as the resin component.

4. The resin composition according to claim 1 , wherein the proportion of a vinyl acetate component in the ethylene-vinyl acetate copolymer resin is 30 mass % or less.

5. The resin composition according to claim 1 , wherein a total content of the antioxidants with respect to 100 parts by mass of the total content of the resin component in the resin composition is 20 to 26 parts by mass.

6. The resin composition according to claim 1 , comprising at least one kind of a crosslinking aid and a processing aid.

7. The resin composition according to claim 1 , to be used in a vehicle wire harness.

8. A resin-coating material obtained by crosslinking the resin composition according to claim 1 .

9. An insulated wire, comprising an insulating film including the resin-coating material according to claim 8 .

10. A vehicle wire harness, comprising the insulated wire according to claim 9 .

11. A method of producing an insulated wire to be used in a vehicle wire harness, the method comprising a step of extrusion-coating a conductor with the resin composition according to claim 1 to provide a resin composition layer and irradiating the resin composition layer with an electron beam of 80 to 250 kGy.

Assignees

• Furukawa Electric Co Ltd
• Furukawa Automotive Systems Inc

Inventors

• Takahashi Kenji
• Watanabe Michimasa
• Nagao Akihiro
• Osuga Hideyuki

Classifications

• C08L2312/00

  Crosslinking · CPC title

• C08L2203/206

  use in coating or encapsulating of electronic parts · CPC title

• C08L2201/02

  Flame or fire retardant/resistant · CPC title

• C08K2201/014

  Additives containing two or more different additives of the same subgroup in C08K · CPC title

• C08K2003/0875

  Antimony · CPC title