Electric cable

Patent metadata

Field	Value
Publication number	US-9236165-B2
Application number	US-201214005922-A
Country	US
Kind code	B2
Filing date	Feb 24, 2012
Priority date	Mar 22, 2011
Publication date	Jan 12, 2016
Grant date	Jan 12, 2016

Abstract

To provide an electric cable that can satisfy flame retardancy and battery fluid resistance in the CHFUS region provided in ISO 6722 and also satisfy low-temperature resistance, wear resistance, and peelability by using a halogen-containing flame retardant. An electric cable in which a coat layer is formed of a non-crosslinked resin composition that includes (A) 40 to 84 parts by mass of a polypropylene homopolymer, (B) 1 to 10 parts by mass of a polypropylene-based modified resin, (C) 10 to 30 parts by mass of a polyolefin-based copolymer, and (D) 5 to 20 parts by mass of an olefin-based elastomer and further includes 1 to 45 parts by mass of a metal hydroxide and 10 to 80 parts by mass of a halogen-containing flame retardant based on 100 parts by mass of the resins (A), (B), (C), and (D) in total.

First claim

The invention claimed is:

1. An electric cable in which a coat layer is formed of a non-crosslinked resin composition that comprises (A) 40 to 84 parts by mass of a polypropylene homopolymer, (B) 1 to 10 parts by mass of a polypropylene-based modified resin, (C) 10 to 30 parts by mass of a polyolefin-based copolymer, and (D) 5 to 20 parts by mass of an olefin-based elastomer and further comprises 1 to 30 parts by mass of a metal hydroxide and 10 to 80 parts by mass of a halogen-containing flame retardant based on 100 parts by mass of the resins (A), (B), (C), and (D) in total;
wherein the polypropylene-based modified resin (B) has a weight average molecular weight of 15,000 to 50,000.

2. The electric cable according to claim 1 , wherein the polypropylene-based modified resin (B) is one prepared by graft-copolymerizing maleic anhydride to a polypropylene-based resin.

3. The electric cable according to claim 2 , wherein the maleic anhydride has an acid value (JIS K0070) of 15 to 55.

4. The electric cable according to claim 1 , wherein the polyolefin-based copolymer (C) is a block copolymer of a propylene homopolymer with ethylene or 1-butene.

5. The electric cable according to claim 1 , wherein the metal hydroxide is magnesium hydroxide.

6. The electric cable according to claim 5 , wherein the magnesium hydroxide is magnesium hydroxide surface-treated with a fatty acid or a silane coupling agent.

7. The electric cable according to claim 1 , wherein the halogen-containing flame retardant is a bromine-containing flame retardant.

8. The electric cable according to claim 7 , wherein the bromine-containing flame retardant is tetrabromobisphenol A-bis(2,3-dibromopropyl ether).

Assignees

• Kogo Kousuke
• Yazaki Corp

Inventors

• Kogo Kousuke

Classifications

• H01B7/295 Primary

  using material resistant to flame · CPC title

• C08L23/16

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

• H01B3/28

  natural or synthetic rubbers · CPC title

• C08K3/0058

  Chemistry & Metallurgy · mapped topic

• C08K3/20

  Oxides; Hydroxides {(graphene oxides C08K3/042)} · CPC title