Electric cable

Patent metadata

Field	Value
Publication number	US-9412488-B2
Application number	US-201214006005-A
Country	US
Kind code	B2
Filing date	Feb 24, 2012
Priority date	Mar 22, 2011
Publication date	Aug 9, 2016
Grant date	Aug 9, 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 wear resistance and low-temperature impact property by using a halogen-containing flame retardant. An electric cable in which a coat layer is formed of a resin composition that includes (A) 55 to 85 parts by mass of a polypropylene homopolymer, (B) 5 to 20 parts by mass of a polypropylene-based modified resin, (C) 5 to 20 parts by mass of a polyolefin-based copolymer, and (D) 5 to 15 parts by mass of a modified olefin-based elastomer, respectively 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. A electric cable comprising:
a coat layer comprising a resin composition, the resin composition comprising:
(A) 55 to 85 parts by mass of a polypropylene homopolymer,
(B) 5 to 20 parts by mass of a polypropylene-based modified resin,
(C) 5 to 20 parts by mass of a polyolefin-based copolymer, and
(D) 5 to 15 parts by mass of a modified olefin-based elastomer,

wherein the coat layer further comprises 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,
wherein the polypropylene-based modified resin (B) is one prepared by graft-copolymerizing maleic anhydride to a polypropylene-based resin,
wherein the metal hydroxide is magnesium hydroxide,
wherein the halogen-containing flame retardant is a bromine-containing flame retardant, and
wherein the bromine-containing flame retardant is tetrabromobisphenol A-bis(2,3-dibromopropyl ether).

2. The electric cable according to claim 1 , wherein the maleic anhydride has an acid value (JIS K0070) of 15 to 55.

3. The electric cable according to claim 1 , wherein the polypropylene-based modified resin (B) has a weight average molecular weight of 15,000 to 50,000.

4. The electric cable according to claim 1 , wherein the polyolefin-based copolymer (C) is a block copolymer or a random copolymer composed of propylene as a primary component with other alpha-olefins.

5. The electric cable according to claim 1 , wherein the magnesium hydroxide is magnesium hydroxide surface-treated with a fatty acid or a silane coupling agent.

6. The electric cable according to claim 1 , wherein the parts by mass of the metal hydroxide is 1 to 29 based on 100 parts by mass of the resins (A), (B), (C), and (D) in total.

7. The electric cable according to claim 1 , wherein the parts by mass of the halogen-containing flame retardant is 51 to 80 based on 100 parts by mass of the resins (A), (B), (C), and (D) in total.

Assignees

• Kogo Kousuke
• Yazaki Corp

Inventors

• Kogo Kousuke

Classifications

• C08L2201/02

  Flame or fire retardant/resistant · CPC title

• H01B3/28

  natural or synthetic rubbers · CPC title

• C08L2205/035

  containing four or more polymers in a blend · CPC title

• C08L23/04

  Homopolymers or copolymers of ethene · CPC title

• C08L23/12

  Polypropene · CPC title