JP2003226792A - Flame-retardant resin composition and non-halogen insulated electrical wire made by using it, and wire harness - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flame-retardant resin composition which can maintain excellent thermal aging performance and has excellent mechanical strength and good flexibility and processability, and a non-halogen insulated electrical wire made by using it. <P>SOLUTION: The flame-retardant resin composition is obtained by mixing 60-97 pts.wt. of a propylene/ethylene-propylene block copolymer and 3-40 pts.wt. of a reactive polymer to give a total of 100 pts.wt., blending the mixture with 30-200 pts.wt. of magnesium hydroxide, 1-10 pts.wt. of an age resistor and 0.1-5 pts.wt. of a metal inactivator, kneading the blend through a twin-screw kneader at 250°C, forming a composition in pellet form with a pelletizer, and extruding the pellets through an extruder into a material of 0.28 mm in thickness. This material is used for forming an electrical wire coating layer around a stranded conductor consisting of seven annealed copper wires each having a cross section of 0.5 mm<SP>2</SP>, thus giving a non-halogen insulated electrical wire. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flame-retardant resin composition, an insulated wire and a wire harness using the same, and more specifically, a non-halogen insulated wire for use as a wiring component for automobiles, which is a non-halogen insulated wire. The present invention relates to a flame-retardant resin composition suitable as a covering material, an insulated electric wire and a wire harness using the same.

[0002]

2. Description of the Related Art A wire harness used as a wiring part for automobiles is called an assembled wire, and an insulated wire having appropriate specifications and thickness is selected and bundled into a wire bundle, which is then taped as it is. Put together, or
It is put into a tube or wrapped with a sheet and taped together, and various parts are attached to make a group of parts.

As an insulated wire constituting a wire harness, a PVC insulated wire in which several copper wires are bundled and covered with a polyvinyl chloride resin is generally used. The copper wire is annealed. Besides annealed copper, tin-plated annealed copper wire is used. In addition, a protective material obtained by blending a polyvinyl chloride resin with a plasticizer and the like (hereinafter referred to as "PV
C protective material) is widely used.

However, PVC insulated wires and PVC protective materials have been regarded as a problem because they emit harmful halogen-based gas during combustion and pollute the global environment. Therefore, as a part of global environment countermeasures, various non-halogen flame-retardant resin compositions have been proposed as alternatives in which a polyolefin-based polymer that is a halogen-free non-halogen resin material is mixed with an appropriate amount of a metal hydroxide as a flame retardant.

For example, the present applicant has proposed the following flame-retardant resin composition. First, Japanese Patent Laid-Open No. 2001
In JP-6447, 50 to 150 parts by weight of a flame retardant (magnesium hydroxide) and an antioxidant (based on 100 parts by weight of a polyolefin resin (polypropylene-ethylene block copolymer, ethylene-vinyl acetate copolymer)). A flame-retardant resin composition containing 4 to 5 parts by weight of an anti-aging agent is disclosed. Next, in JP-A-10-340627, a flame retardant (metal hydroxide) is added to 100 parts by weight of a polymer obtained by mixing 90 to 40 parts by weight of an olefin elastomer and 10 to 60 parts by weight of polypropylene.
A flame-retardant resin composition containing 50 to 400 parts by weight and 0.2 to 5 parts by weight of a copper damage inhibitor is disclosed. Also,
In JP-A-11-45620, an antioxidant (antiaging agent) is added to 100 parts by weight of a polymer obtained by combining polyethylene and an ethylene-vinyl acetate copolymer.
A flame-retardant resin composition containing a metal deactivator is disclosed. Furthermore, in Japanese Patent Laid-Open No. 2000-26696,
50 to 150 parts by weight of a flame retardant (magnesium hydroxide), 1 part by weight of an antioxidant, and 100 parts by weight of a polymer obtained by combining a propylene-ethylene block copolymer and a polyolefin-rubber thermoplastic elastomer, and copper damage prevention A flame-retardant resin composition containing 1 part by weight of an agent (lubricant) is disclosed.

The non-halogen insulated wire obtained by coating the copper wire around these flame-retardant resin compositions as a wire coating material is used in a state of being mixed with a PVC insulated wire rather than being used alone. Often. The reason is that the PVC insulated wire is considered to be superior in terms of workability and economy. That is, by mixing non-halogen insulated wires, the amount of harmful halogen gas generated is reduced, which is a global environment countermeasure.

[0007]

However, the present inventors have found that a mixed wire bundle in which a non-halogen insulated wire and a PVC insulated wire are mixed (hereinafter also simply referred to as “mixed wire bundle”) is wound with a PVC tape. With a harness,
A heat aging test was carried out on a wire harness in which a single wire bundle consisting of only non-halogen insulated wires (hereinafter also simply referred to as "non-halogen single wire bundle") was wrapped with PVC tape. The result was significantly inferior to the heat aging performance of the wire bundle.

Then, the inventors investigated the cause and concluded that the extraction of the antioxidant from the wire coating material of the non-halogen insulated wire may be the main cause of the poor heat aging performance of the mixed wire bundle. Came to do. The plasticizer contained in the PVC tape or the adjacent PVC insulated electric wire diffuses into the wire coating material of the non-halogen insulated electric wire and dissolves the anti-aging agent. To PVC tape or adjacent PVC
This is because the anti-aging agent is extracted from the wire coating material of the non-halogen insulated wire as a result of returning to the insulated wire. Thus, it is considered that the heat aging performance of the mixed electric wire bundle is inferior because the antioxidant is reduced.

Further, the plasticizer contained in the PVC tape or the adjacent PVC insulated electric wire reacts with the copper wire when it is transferred to the non-halogen insulated electric wire, and promotes the ionization of copper. Copper ions act as a catalyst to break the chemical bonds of the wire coating polymer and deteriorate the wire coating material of the halogen-free insulated wire. This is also considered to be a cause of reducing the heat aging performance of the mixed electric wire bundle. Therefore, it is necessary to take some measures so as not to deteriorate the heat aging performance.

On the other hand, regarding non-halogen flame-retardant resin compositions, there are many known technologies of other companies. For example,
Japanese Patent Laid-Open No. 9-95566 discloses a polyolefin (L
DPE, HDPE, EEA) 100 parts by weight, metal hydroxide (magnesium hydroxide) 50 to 200 parts by weight, antioxidant 15 parts by weight or less, bis [2-methyl-
4- {3-n-alkyne (C12-C14) thiopropionyloxy} -5-tert-butylphenyl] sulfide} 5 parts by weight or less and decamethylenedicarboxylic acid disalicyloyl hydrazide (5 parts by weight or less) A blended flame-retardant resin composition is disclosed. JP-A-2000-129
No. 064 discloses that, with respect to 100 parts by weight of EVA or 100 parts by weight of a polymer obtained by combining EVA and a polyolefin, 165 to 250 parts by weight of a metal hydrate (magnesium hydroxide) surface-treated with a silane coupling agent, Disclosed is a flame-retardant resin composition containing 4 to 15 parts by weight of an antioxidant (aging inhibitor) (3 to 9 parts by weight of a benzimidazole antioxidant and 1 to 6 parts by weight of a phenolic antioxidant). Has been done. Japanese Unexamined Patent Publication No. 2001-312925 discloses a polyolefin-based synthetic resin (PP, PE, EVA,
EPR) 10 to 500 parts by weight of surface-treated magnesium hydroxide, 0.01 to 10 parts by weight of an antioxidant and / or a metal deactivator, and an ultraviolet absorber and / or a light stabilizer with respect to 100 parts by weight of EPR). A flame-retardant resin composition containing 0.01 to 10 parts by weight is disclosed. Furthermore, JP-A-6-
No. 345979 discloses a thermoplastic resin (PE, EV
A) 10 to 80 parts by weight of 1,2-bis (bromophenyl) ethane and 100 parts by weight of antimony trioxide
A flame-retardant resin composition containing -40 parts by weight, 1.5 parts by weight of an antioxidant, and 0.5 parts by weight of a metal deactivator is disclosed.

However, even if a non-halogen insulated wire coated with a flame-retardant resin composition according to the known technology of another company is used, the heat aging performance is deteriorated due to the migration of the plasticizer as described above. The problem is pointed out.
This is because any of the above-mentioned known wire coating materials has a structure in which a large amount of a metal hydroxide is blended as a flame retardant with a polyolefin base polymer. Also,
Although there are some examples in which an antiaging agent and a copper anti-corrosion agent are blended, the effects of the conventional examples are not sufficient.

Further, according to the above-mentioned known technique, since a large amount of metal hydroxide is blended, there is a concern that the mechanical strength such as wear resistance and tensile strength may be lowered. There is also a problem in that the flexibility of the electric wire is impaired when a high polymer is used. Therefore, it is desired that the mechanical strength of the electric wire is not lowered without impairing the flexibility even if a large amount of the metal hydroxide is blended.

The object of the present invention is to provide flame retardancy which is capable of maintaining excellent heat aging performance while giving due consideration to environmental measures, excellent mechanical strength, and good flexibility and processability. It is intended to provide a resin composition, a halogen-free insulated electric wire and a wire harness using the same. Thus, it is intended to stabilize the wire quality of the wire harness using the mixed wire bundle and achieve permanent use.

[0014]

In order to solve this problem, the invention according to claim 1 relating to the flame-retardant resin composition is such that the polypropylene content is 50 wt% or more and the ethylene propylene content is A propylene / ethylene-propylene block copolymer having a content of 10 wt% or less, and 60 to 97 parts by weight of a propylene / ethylene-propylene block copolymer having a melt flow rate of 0.1 to 5 g / 10 minutes and modified with a carboxylic acid anhydride. 30 to 200 parts by weight of metal hydroxide, and 1 anti-aging agent, based on 100 parts by weight of the polymer prepared by adding 3 to 40 parts by weight of the prepared reactive polymer so as to be 100 parts by weight.
The gist is to mix 10 to 10 parts by weight and 0.1 to 5 parts by weight of a copper damage inhibitor.

The above "polypropylene content is 50 wt%
The above is a propylene / ethylene-propylene block copolymer having an ethylene propylene content of 10 wt% or less and a melt flow rate of 0.1 to 5 g.
/ 10 min propylene / ethylene-propylene block copolymer "is the one used as the base polymer. 60-97 parts by weight of the propylene / ethylene-propylene block copolymer as a base polymer is blended, because the flexibility is impaired when the blending amount exceeds this range, and the mechanical strength (tensile elongation, tensile strength, wear resistance is deteriorated when the blending amount falls below this range. This is because the sex) is impaired. The blending amount of the propylene / ethylene-propylene block copolymer is more preferably 70 to 90 parts by weight. The melt flow rate (hereinafter also simply referred to as “MFR”) is “JIS K
6758 ”in accordance with the temperature of 230 ° C (or 190
C.) and a load of 2.16 kg. M
The FR is preferably in such a range from the viewpoint of improving processability and extrusion moldability. The reason why the polyolefin-based polymer is used as the base polymer is that it does not contain a halogen element that generates a toxic gas at the time of combustion, and thus is a global environment countermeasure. Incidentally, the ethylene propylene content is preferably 5 wt% or less.

The "reactive polymer" is 0.1 to 1 depending on a monomer containing an acid anhydride group (eg, maleic anhydride).
Those modified with 0% by weight are desirable. The reason is that it contributes to improve the mechanical strength (in particular, wear resistance). The reason why the reactive polymer is blended is that if the polypropylene-based resin used as the base polymer is relatively increased, the flexibility and processability deteriorate, but the reactive polymer does not cause such a problem. . That is, 100 parts by weight of the reactive polymer was added to the propylene / ethylene-propylene block copolymer in order to improve mechanical strength and heat resistance without impairing flexibility.

The above-mentioned "metal hydroxide" is blended as a flame retardant, and preferable examples include magnesium hydroxide, aluminum hydroxide, calcium hydroxide and the like. The reason why 30 to 200 parts by weight of the metal hydroxide is blended is that if the blending amount exceeds this range, the abrasion resistance and flexibility are impaired, and if it is less than this range, the flame retardancy is impaired. It is more preferable to add 50 to 150 parts by weight of the metal hydroxide. The reason for this is that if it is too small, it does not exhibit flame retardancy enough to exhibit self-extinguishing properties, and if it is too large, it adversely affects mechanical strength such as abrasion resistance and tensile strength. However, the adverse effect is alleviated by the incorporation of the reactive polymer.

The metal hydroxide particles may be surface-treated with a coupling agent, particularly a silane coupling agent such as an aminosilane coupling agent, a vinylsilane coupling agent, or an epoxysilane coupling agent. The silane coupling agent is S bound to the hydroxide.
This is because it contains an i-O bond. In the present invention, magnesium hydroxide or aluminum hydroxide surface-treated with an aminosilane coupling agent is suitable.

The above-mentioned anti-aging agent and copper anti-corrosion agent are blended especially when used in the form of a wire harness.
This is to prevent the deterioration of the heat aging performance of the non-halogen insulated wire itself even if it is used in a mixture with a PVC insulated wire or is covered with a PVC tape. That is, if an antiaging agent or a copper damage inhibitor is blended, it is less likely to be affected by the PVC protective material and the plasticizer transferred from the adjacent PVC insulated wire.

Examples of the antiaging agent (also referred to as a heat stabilizer or an antioxidant) are, for example, tetrakis- [methylene-3- (3 ', 5'-di-tert-butyl-4'-hydroxyphenyl). Propionate] Methane, octadecyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate and other phenolic compounds, 4,4 ′
-Dioctyldiphenylamine, N-phenyl-N'-
Amine-based compounds such as 1,3-dimethylbutyl-p-phenylenediamine are preferred. These antioxidants may be added alone or in combination of two or more, and are not particularly limited. In the present invention, the antioxidant may be added in an amount of 1 to 10 parts by weight, more preferably 2 to 8 parts by weight. The reason is PVC
This is because excellent heat aging performance can be maintained for a longer time even when used in a mixed state with an insulated wire or the like.

Examples of the copper damage inhibitor (metal deactivator) include 1,2,3-benzotriazole, tolyltriazole and its derivatives, tolyltriazole amine salt, tolyltriazole potassium salt, and 3- (N-salicyloyl). ) Amino-1,2,4-triazole, a triazine derivative, a hydrazide derivative such as decamethylenedicarboxylic acid disalicyloyl hydrazide, an oxalic acid derivative, and a salicylic acid derivative are preferable. These copper damage inhibitors may be added alone or in combination of two or more, and are not particularly limited. In the present invention, the copper damage inhibitor may be added in an amount of 0.1 to 5 parts by weight.
It is more preferable to add 3 to 3 parts by weight. The reason is that excellent heat aging performance can be maintained for a long time even when used in a mixed state with PVC insulated wires and the like.

Further, a processing aid or the like can be added if necessary. Further, in the present invention, no crosslinking is applied.

The flame-retardant resin composition according to claim 1 having the above constitution comprises 60 to 97 parts by weight of a propylene / ethylene-propylene block copolymer and a reactive polymer 3.
Since 100 parts by weight including 40 parts by weight is blended together, excellent mechanical strength (tensile elongation, tensile strength, abrasion resistance) is exhibited, and flexibility is impaired by the incorporation of the reactive polymer. I can't. Further, since the melt flow rate of the propylene / ethylene-propylene block copolymer is an appropriate value, it has excellent processability. Furthermore, since an antiaging agent and a copper damage inhibitor are mixed in appropriate amounts, PV
Excellent heat aging performance can be maintained even when used in the state of being mixed with C insulated wire. Further, since the flame retardant is blended in an appropriate amount, it also has excellent flame retardancy.

In the case described in claim 1, as described in claim 2, the reactive polymer is a modified styrene elastomer, an acid modified ethylene α-olefin copolymer, an acid modified ethylene propylene rubber or an acid. At least one selected from modified polyethylene is desirable. This is because these reactive polymers can improve mechanical strength and heat resistance without impairing flexibility.

Here, "modified styrene elastomer"
As a styrene elastomer modified by carboxylic acid anhydride (maleic anhydride), the double bond of a block copolymer obtained by copolymerizing styrene and butadiene (or styrene and ethylene-propylene) is saturated by hydrogenation, and hydrogenated Styrene butadiene rubber is mentioned as a suitable thing. Preferred examples of the “acid-modified ethylene α-olefin copolymer” include ethylene-vinyl acetate copolymer modified with carboxylic acid anhydride, ethylene-ethyl acrylate copolymer, and ethylene-methyl methacrylate copolymer. Preferable examples of the “acid-modified ethylene propylene rubber” include ethylene-propylene rubber modified with a carboxylic acid anhydride (maleic anhydride). Preferable examples of the “acid-modified polyethylene” include low-density polyethylene modified with a carboxylic acid anhydride (maleic anhydride) or linear low-density polyethylene.

A non-halogen insulated wire according to a second aspect of the present invention is characterized in that, as described in claim 3, the outer peripheral surface of the twisted wire made of annealed copper wire is the flame-retardant resin composition according to claim 1 or 2. The gist is to cover with.

According to the non-halogen insulated wire according to claim 3 having the above structure, since the flame-retardant resin composition according to claim 1 or 2 is used as a wire coating material, excellent heat aging is achieved. The performance can be maintained.

[0028] A wire harness according to a third aspect of the present invention is a mixture of a polyvinyl chloride insulated wire in which the outer peripheral surface of a twisted wire made of annealed copper wire is coated with polyvinyl chloride resin, and a non-halogen insulated wire according to claim 3. The gist is that the outer peripheral surface of the mixed electric wire bundle thus formed is covered with a tape-shaped, tube-shaped, or sheet-shaped protective material made of polyvinyl chloride resin.

As the base polymer used for the electric wire coating material of the polyvinyl chloride insulated electric wire, besides vinyl chloride, ethylene vinyl chloride copolymer, propylene vinyl chloride copolymer and the like are preferable. These base polymers have good miscibility with the polyvinyl chloride resin in order to impart flexibility to the polyvinyl chloride resin to improve the workability of the material, or to reduce the material cost. A plasticizer excellent in electric insulation and the like is blended. An antioxidant may be further added to this.
As the antiaging agent added in this case, the one compounded with the flame-retardant resin composition according to claim 1 or 2 can be used.

According to the wire harness of the fourth aspect having the above-mentioned structure, since the wire covering material of the non-halogen insulated wire contains the antioxidant and the copper damage inhibitor, it is mixed with the PVC insulated wire. Even when it is used in the above state, it is possible to maintain the excellent heat aging property for a long period of time while avoiding the influence of the plasticizer.

[0031]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described in detail below. FIG. 1 shows a PVC insulated wire 12 as well as a non-halogen insulated wire 10 according to an embodiment of the present invention.
2 shows the appearance of a general insulated wire such as.
The non-halogen insulated electric wire 10 is obtained by coating a conductor 14 (cross-sectional area 0.5 mm ² ) of an annealed copper stranded wire formed by twisting seven annealed copper wires with a non-halogen flame-retardant resin composition in a thickness of 0.28 mm. In addition, a general automobile wire is 0.3 mm
The size (cross-sectional area) is ^{2 to} 1.25 mm ² and the coating thickness is 0.
The thing of 16-0.3 mm is often used.

FIG. 2 shows an appearance of the wire harness 16 according to the embodiment of the present invention.
The mixed electric wire bundle 18 was covered by wrapping the tape 20 with PVC adhesive (also simply referred to as "PVC protective material") around the "mixed electric wire bundle 18 in which the non-halogen insulated electric wire 10 and the PVC insulated electric wire 12 are mixed". It relates to the wire harness 16.

3 (a) to 3 (d) also show the appearance of the wire harness according to the embodiment of the present invention. FIG. 3 (a) shows the mixed electric wire bundle 18 in the PVC tube 2.
2 shows a wire harness 24 coated with 2 (also simply referred to as "PVC protective material"),
The wire harness 26 in which the tape 20 with the PVC adhesive is wound around the end edge of the PVC tube 22 shown in (b) in FIG. It is shown, (c) is P
A wire harness 30 is shown in which a VC sheet 28 (also simply referred to as a “PVC protective material”) is covered around a mixed electric wire bundle 18, and the circumference is wrapped with a tape 20 with a PVC adhesive to be bound. , (D) is PVC
The wire harness 34 is shown in which the sheet 28 to which the adhesive 32 has been applied in advance is covered by the mixed electric wire bundle 18 and is bound at the portion to which the adhesive 32 is applied. The mixed wire bundles shown in these figures have a total of 30 wires,
The mixing ratio (“the number of PVC insulated wires: the number of non-halogen insulated wires”) is arbitrary.

[0034]

The preferred embodiments of the present invention will be described in detail below.

First, Table 1 shows the manufacturer name, trade name, and various characteristics of the compounded resin material of the flame-retardant resin composition used in this example. Further, in the following description, when the compounded resin material names in Table 1 are used, the commercial materials listed in the table are meant.

[0036]

[Table 1]

(2) Flame-retardant resin composition, non-halogen insulated wire using the flame-retardant resin composition, and halogen-free insulated wire using the flame-retardant resin composition.
Will be described with reference to Table 4.

[0038]

[Table 2]

[0039]

[Table 3]

[0040]

[Table 4]

First, each embodiment will be described with reference to Table 2. (Example 1) Block copolymer PP1 (propylene / ethylene-having a polypropylene content of 50 wt% or more and an ethylene propylene content of 10 wt% or less)
A propylene block copolymer having an MFR of 0.
1-5g / 10 minutes) 60 parts by weight and MAH-SE
Magnesium hydroxide A was added to 100 parts by weight of a polymer containing 40 parts by weight of BS (styrene-based elastomer in which the double bond of a block copolymer of styrene and butadiene was saturated by hydrogenation and modified with maleic anhydride). 70 parts by weight (having an average particle size of 1 μm and surface-treated with an aminosilane coupling agent), and 3 parts by weight of an antioxidant (hindered phenol type),
A mixture of 0.5 parts by weight of a metal deactivator (copper damage inhibitor) was mixed with a biaxial kneader at a mixing temperature of 250 ° C. to prepare a pelletized composition with a pelletizer, which was then extruded. A flame-retardant resin composition was obtained by extrusion processing to a thickness of 0.28 mm. Then, this is a wire coating layer (0.28 mm
As a thickness), a non-halogen insulated electric wire was obtained by forming around a conductor (cross-sectional area 0.5 mm ² , compressed conductor) of an annealed copper wire formed by twisting seven annealed copper wires.

(Example 2-1) Block copolymer PP
90 parts by weight of magnesium hydroxide A and 100 parts by weight of a polymer obtained by mixing 97 parts by weight of 1 and 3 parts by weight of MAH-EPR (ethylene-propylene rubber modified with maleic anhydride), and an antioxidant. 5 parts by weight and 1 part by weight of a metal deactivator were mixed at a mixing temperature of 250 ° C. by a twin-screw kneader to form a pelletized composition with a pelletizer, which was then mixed with an extruder to give a composition of 0. A flame-retardant resin composition was obtained by extrusion processing to a thickness of 28 mm. And
Using this as a wire coating layer (0.28 mm thick), 7
Conductor of twisted annealed copper wire (cross-sectional area 0.5 mm ² ,
A halogen-free insulated electric wire was obtained by forming it around the compressed conductor).

(Example 2-2) M in Example 2-1
A flame-retardant resin composition and a halogen-free insulated wire were obtained in the same manner as in Example 2-1 except that MAH-SEBS was used instead of AH-EPR.

Example 3-1 Block Copolymer PP
80 parts by weight of 1 and 20 parts by weight of MAH-EVA (ethylene-vinyl acetate copolymer modified with maleic anhydride) were mixed with 100 parts by weight of a polymer, and magnesium hydroxide B (average particle size 1 μm Unprocessed)
30 parts by weight, 1 part by weight of anti-aging agent, and 0.5 parts by weight of metal deactivator were mixed at a mixing temperature of 250 ° C. with a twin-screw kneader and pelletized with a pelletizer. This was extruded using an extruder to a thickness of 0.28 mm to obtain a flame-retardant resin composition. A non-halogen insulated electric wire is obtained by forming this around a conductor (cross-sectional area 0.5 mm ² , compressed conductor) of an annealed copper wire formed by twisting seven annealed copper wires as an electric wire coating layer (0.28 mm thick). It was

(Example 3-2) M in Example 3-1
A flame-retardant resin composition and a halogen-free insulated wire were obtained in the same manner as in Example 3-1, except that MAH-SEBS was used instead of AH-EVA.

Example 4 With respect to 100 parts by weight of a polymer obtained by mixing 90 parts by weight of the block copolymer PP1 and 10 parts by weight of MAH-SEBS, 200 parts by weight of magnesium hydroxide B and 5 parts of an antioxidant were added. A mixture of 1 part by weight and 0.6 part by weight of a metal deactivator is mixed at a mixing temperature of 250 ° C. by a twin-screw kneader to form a pelletized composition by a pelletizer, which is then mixed with an extruder to obtain a pellet composition. A flame-retardant resin composition was obtained by extrusion processing to a thickness of 28 mm. And
Using this as a wire coating layer (0.28 mm thick), 7
Conductor of twisted annealed copper wire (cross-sectional area 0.5 mm ² ,
A halogen-free insulated electric wire was obtained by forming it around the compressed conductor).

Example 5-1 Block Copolymer PP
80 parts by weight of 1 and 20 parts by weight of MAH-LDPE (low-density polyethylene modified with maleic anhydride) were mixed with 100 parts by weight of a polymer, and 70 parts by weight of magnesium hydroxide A and an antioxidant were added. A mixture of 3 parts by weight and 1 part by weight of a metal deactivator was mixed at a mixing temperature of 250 ° C. by a twin-screw kneader to form a pelletized composition by a pelletizer, which was 0.28 mm by an extruder. It was extruded into a thickness to obtain a flame-retardant resin composition. A non-halogen insulated electric wire is obtained by forming this around a conductor (cross-sectional area 0.5 mm ² , compressed conductor) of an annealed copper wire formed by twisting seven annealed copper wires as an electric wire coating layer (0.28 mm thick). It was

(Example 5-2) M in Example 5-1
A flame-retardant resin composition and a non-halogen insulated wire were obtained in the same manner as in Example 5-1 except that MAH-SEBS was used instead of AH-LDPE.

Next, each comparative example will be described with reference to Tables 3 and 4. (Comparative Example 1-1) Polymer 1 in which 99 parts by weight of block copolymer PP1 and 1 part by weight of MAH-EVA were blended.
With respect to 00 parts by weight, 70 parts by weight of magnesium hydroxide A, 2 parts by weight of an antioxidant and 0.5 parts of a metal deactivator.
A mixture of parts by weight is mixed with a twin-screw kneader at a mixing temperature of 250 ° C. to form a pelletized composition with a pelletizer, which is extruded to a thickness of 0.28 mm with an extruder to produce a flame-retardant resin. A composition was obtained. A non-halogen insulated electric wire is obtained by forming this around a conductor (cross-sectional area 0.5 mm ² , compressed conductor) of an annealed copper wire formed by twisting seven annealed copper wires as an electric wire coating layer (0.28 mm thick). It was

(Comparative Example 1-2) M in Comparative Example 1-1
A flame-retardant resin composition and a non-halogen insulated wire were obtained in the same manner as Comparative Example 1-1, except that MAH-SEBS was used instead of AH-EVA.

Comparative Example 2-1 Block Copolymer PP
50 parts by weight of 1 and 50 parts by weight of MAH-EPR, 100 parts by weight of a polymer, 80 parts by weight of magnesium hydroxide B, 3 parts by weight of an antioxidant and 1 part of a metal deactivator. A mixture of parts by weight is mixed with a twin-screw kneader at a mixing temperature of 250 ° C. to form a pelletized composition with a pelletizer, which is extruded to a thickness of 0.28 mm with an extruder to produce a flame-retardant resin. A composition was obtained. A non-halogen insulated electric wire is obtained by forming this around a conductor (cross-sectional area 0.5 mm ² , compressed conductor) of an annealed copper wire formed by twisting seven annealed copper wires as an electric wire coating layer (0.28 mm thick). It was

(Comparative Example 2-2) M in Comparative Example 2-1
A flame-retardant resin composition and a non-halogen insulated wire were obtained in the same manner as Comparative Example 2-1, except that MAH-SEBS was used instead of AH-EPR.

(Comparative Example 3) 20 parts by weight of magnesium hydroxide A and 1 part of the antioxidant were added to 100 parts by weight of a polymer obtained by mixing 70 parts by weight of the block copolymer PP1 and 30 parts by weight of MAH-SEBS. 0.5 parts by weight and 0.5 parts by weight of a metal deactivator were mixed in a twin-screw kneader at a mixing temperature of 250 ° C. to form a pellet composition with a pelletizer, which was then extruded. A flame-retardant resin composition was obtained by extrusion processing to a thickness of 0.28 mm. Then, using this as an electric wire coating layer (thickness of 0.28 mm), a conductor of an annealed copper stranded wire in which seven annealed copper wires are twisted (cross-sectional area 0.5 mm
⁽² , compressed conductor) to form a non-halogen insulated electric wire.

Comparative Example 4-1 Block Copolymer PP
1 to 70 parts by weight of MAH-EVA and 100 parts by weight of a polymer, 250 parts by weight of magnesium hydroxide B, 2 parts by weight of an antioxidant and 1 part of a metal deactivator. A mixture of parts by weight is mixed with a twin-screw kneader at a mixing temperature of 250 ° C. to form a pelletized composition with a pelletizer, which is extruded to a thickness of 0.28 mm with an extruder to produce a flame-retardant resin. A composition was obtained. A non-halogen insulated electric wire is obtained by forming this around a conductor (cross-sectional area 0.5 mm ² , compressed conductor) of an annealed copper wire formed by twisting seven annealed copper wires as an electric wire coating layer (0.28 mm thick). It was

(Comparative Example 4-2) M in Comparative Example 4-1
A flame-retardant resin composition and a non-halogen insulated wire were obtained in the same manner as in Comparative Example 4-1, except that MAH-SEBS was used instead of AH-EVA.

Comparative Example 5 80 parts by weight of the block copolymer PP1 and SEBS (styrene-butadiene block copolymer (unmodified) in which the double bond of the block copolymer of styrene and butadiene is saturated by hydrogenation) are added. Biaxially blending 90 parts by weight of magnesium hydroxide A, 5 parts by weight of antioxidant, and 0.5 parts by weight of metal deactivator with respect to 100 parts by weight of polymer mixed with 20 parts by weight. The mixture was mixed at a mixing temperature of 250 ° C. with a kneader to form a pelletized composition with a pelletizer, which was extruded to a thickness of 0.28 mm using an extruder to obtain a flame-retardant resin composition. Then, this is covered with an electric wire coating layer (0.2
A non-halogen insulated electric wire was obtained by forming it around a conductor (cross-sectional area 0.5 mm ² , compressed conductor) of an annealed copper wire formed by twisting seven annealed copper wires (8 mm thick).

(Comparative Example 6) Block copolymer PP2
90 parts by weight of MA (with an MFR of 20 g / 10 min) and MA
Polymer 100 blended with 10 parts by weight of H-SEBS
90 parts by weight of magnesium hydroxide A, 1 part by weight of an antioxidant and 1 part by weight of a metal deactivator were mixed in a biaxial kneader at a mixing temperature of 250 ° C. A pelletized composition was formed with a pelletizer, and the composition was extruded to a thickness of 0.28 mm using an extruder to obtain a flame-retardant resin composition. A non-halogen insulated electric wire is obtained by forming this around a conductor (cross-sectional area 0.5 mm ² , compressed conductor) of an annealed copper wire formed by twisting seven annealed copper wires as an electric wire coating layer (0.28 mm thick). It was

Comparative Example 7-1 Random Copolymer PP
100 parts by weight of a polymer containing 80 parts by weight of MAH-LDPE and 20 parts by weight of MAH-LDPE, 70 parts by weight of magnesium hydroxide A, 3 parts by weight of an antioxidant and 0. 5 parts by weight were mixed with a twin-screw kneader at a mixing temperature of 250 ° C. to form a pelletized composition with a pelletizer, which was extruded to a thickness of 0.28 mm using an extruder and flame retarded. A resin composition was obtained. And
Using this as a wire coating layer (0.28 mm thick), 7
Conductor of twisted annealed copper wire (cross-sectional area 0.5 mm ² ,
A halogen-free insulated electric wire was obtained by forming it around the compressed conductor).

(Comparative Example 7-2) M in Comparative Example 7-1
A flame-retardant resin composition and a halogen-free insulated wire were obtained in the same manner as in Comparative Example 7-1 except that MAH-SEBS was used instead of AH-LDPE.

Comparative Example 8-1 Block Copolymer PP
80 parts by weight of MAH-EVA and 100 parts by weight of a polymer in which 80 parts by weight of MAH-EVA are mixed, 80 parts by weight of magnesium hydroxide A, 0.1 part by weight of an antioxidant, and a metal deactivator. 0.1 part by weight was mixed with a twin-screw kneader at a mixing temperature of 250 ° C. to form a pellet-shaped composition with a pelletizer, which was then mixed with an extruder to obtain 0.28 mm.
It was extruded into a thickness to obtain a flame-retardant resin composition. Then, using this as an electric wire coating layer (thickness of 0.28 mm), a conductor of an annealed copper stranded wire in which seven annealed copper wires are twisted (cross-sectional area 0.5 mm
⁽² , compressed conductor) to form a non-halogen insulated electric wire.

(Comparative Example 8-2) M in Comparative Example 8-1
A flame-retardant resin composition and a non-halogen insulated wire were obtained in the same manner as in Comparative Example 8-1, except that MAH-SEBS was used instead of AH-EVA.

Comparative Example 9 100 parts by weight of a polymer obtained by mixing 90 parts by weight of the block copolymer PP1 and 10 parts by weight of MAH-SEBS with 100 parts by weight of magnesium hydroxide A and 2 parts of an antioxidant. A mixture of parts by weight is mixed with a twin-screw kneader at a mixing temperature of 250 ° C. to form a pelletized composition with a pelletizer, which is extruded to a thickness of 0.28 mm with an extruder to produce a flame-retardant resin. A composition was obtained (no metal deactivator was incorporated). Then, using this as an electric wire coating layer (thickness of 0.28 mm), a conductor of an annealed copper stranded wire in which seven annealed copper wires are twisted (cross-sectional area 0.5 mm
⁽² , compressed conductor) to form a non-halogen insulated electric wire.

Comparative Example 10-1 Block Copolymer P
100 parts by weight of a polymer obtained by mixing 70 parts by weight of P1 and 30 parts by weight of MAH-LDPE, 100 parts by weight of magnesium hydroxide A, 12 parts by weight of an antioxidant, and 8 parts of a metal deactivator. The mixture of parts by weight is mixed with a twin-screw kneader at a mixing temperature of 250 ° C. to form a pelletized composition with a pelletizer, which is then mixed with an extruder for 0.28 m.
A flame-retardant resin composition was obtained by extrusion processing to a thickness of m. Then, using this as an electric wire coating layer (thickness of 0.28 mm), an annealed copper conductor obtained by twisting seven annealed copper wires (cross-sectional area: 0.5 m)
m ² , a compressed conductor) to form a non-halogen insulated electric wire.

(Comparative Example 10-2) A flame-retardant resin composition and a non-halogen compound were prepared in the same manner as in Comparative Example 10-1 except that MAH-SEBS was used instead of MAH-LDPE in Comparative Example 10-1. Got with an insulated wire.

Three Wire Harness Next, using the halogen-free insulated electric wire produced as described above, a wire harness was produced for each of Examples and Comparative Examples. This wire harness is manufactured by mixing 10 non-halogen insulated wires and 20 PVC insulated wires into a mixed wire bundle, and winding a tape with a PVC adhesive around the mixed wire bundle (see FIG. 2). By the way, P
As shown in Table 5, the VC insulated wire has 40 parts by weight of DINP (diisononyl phthalate) as a plasticizer and 20 parts by weight of calcium carbonate as a filler with respect to 100 parts by weight of polyvinyl chloride resin (polymerization = 1300). And 5 parts by weight of zinc / calcium-based stabilizer as a stabilizer are mixed at a mixing temperature of 250 ° C. by a twin-screw kneader to form a pelletized composition by a pelletizer, which is then extruded using an extruder. Formed around a conductor (cross-sectional area 0.5 mm ² , compressed and / or round conductor) of annealed copper wire formed by twisting 7 annealed copper wires as an electric wire coating layer extruded to a thickness of 0.28 mm. Obtained by.

Further, as shown in Table 5, the tape with a PVC adhesive wound around a mixed electric wire bundle has an adhesive of 0.02 mm thickness made of an adhesive on one whole surface of a substrate made of polyvinyl chloride resin. Layers are provided, and the total thickness is 0.13 mm. As the base material of the tape with the PVC adhesive, as shown in Table 5, with respect to 100 parts by weight of polyvinyl chloride resin (degree of polymerization P = 1300),
Using a mixture of 60 parts by weight of DOP (dioctyl phthalate) as a plasticizer, 20 parts by weight of calcium carbonate as a filler, and 5 parts by weight of zinc-calcium-based stabilizer as a stabilizer, applied to one surface of a base material As the adhesive to be used, a mixture of 30 parts by weight of NR (natural rubber), 20 parts by weight of zinc white, and 80 parts by weight of rosin resin with respect to 70 parts by weight of styrene-butadiene rubber (SBR) is used. ing.

[0067]

[Table 5]

4. Method of Characteristic Evaluation Test The characteristic evaluation of each example and each comparative example is as follows: tensile elongation (%),
The tensile strength (MPa), flame retardancy, abrasion resistance (number of times), heat resistance A, heat resistance B, flexibility and workability were measured by the following test methods.

(Tensile elongation and tensile strength) JASO D6
It was carried out according to 11-94. That is, a halogen-free insulated electric wire was cut into a length of 150 mm and the electric conductor was removed to obtain a tubular test piece containing only the flame-retardant resin composition. Marks were marked on the central portion at intervals of 50 mm. And 2
After attaching both ends of the test piece to the chuck of the tensile tester at room temperature of 3 ± 5 ° C., the test piece was pulled at a pulling speed of 200 mm / min, and the load when cutting the test piece and the distance between marked lines were measured. The tensile elongation was 125% or more, and the tensile strength was 15.7 MPa or more.

(Flame Retardancy) It was conducted in accordance with JASO D611-94. That is, a non-halogen insulated wire is
A test piece was cut out to a length of 0 mm. Next, each test piece was put in an iron-type test box and supported horizontally, and a Bunsen burner with a diameter of 10 mm was used to apply the tip of the reducing flame from the lower side of the center of the test piece until it burned within 30 seconds, The afterflame time after quiet removal of the flame was measured. The afterflame time of 15 seconds or less was regarded as a pass, and the afterflame time of more than 15 seconds was regarded as a failure.

(Abrasion resistance) The abrasion resistance was measured by the blade reciprocating method according to JASO D611-94. That is, a non-halogen insulated wire was cut into a length of 750 mm to obtain a test piece. At room temperature of 25 ° C., the electric wire coating material surface of the test piece fixed on the table was axially moved over a length of 10 mm to reciprocate the blade to abrade the electric wire coating material, and the blade was loaded with 7 N. The number of reciprocations until the blade came into contact with the electric conductor due to wear of the electric wire coating material when reciprocating at a speed of 50 times per minute was measured. Then, test piece 1
The sample was moved by 00 mm and rotated 90 degrees clockwise, and the above measurement was repeated. This measurement was performed three times on the same test piece, and a minimum value of 150 times or more was regarded as a pass.

(Heat resistance A) One of the halogen-free insulated electric wires was aged at 150 ° C. for 72 hours, and then the one in which no crack was generated in the electric wire coating material by self-diameter winding was passed.

(Heat resistance B) A wire harness, that is, a mixed wire bundle in which 10 pieces of the non-halogen insulated wires and 20 pieces of the PVC insulated wires described above are mixed and wrapped around a PVC adhesive tape around 150 ° C. After aging for 72 hours, the wire coating material that did not crack due to self-diameter winding was regarded as acceptable.

(Flexibility) Judgment was made by touch when the electric wire was bent.

(Workability) It was judged by the presence or absence of a beard when the wire end was peeled off.

(5) Results of Characteristic Evaluation Test Next, the results of the characteristic evaluation test will be described with reference to Tables 6 and 7 in which pass lines are also described. In addition, in the case of collectively referring to Examples or Comparative Examples, for example, Examples 2-1 and 2-2 in which only some of the components are different, they will be simply described as Example 2. As shown in Table 6, since the products of this example obtained good results in all the test items, the comprehensive evaluation was also good (◯). On the other hand, since the comparative example product was good or bad depending on the test items, the comprehensive evaluation was bad (x). The details will be described below together with consideration.

[0077]

[Table 6]

[0078]

[Table 7]

Examples 1 to 5 are tensile elongation, tensile strength,
The good test results for abrasion resistance and flexibility showed that the block copolymer PP1 was 60 to 97 parts by weight,
It is considered that 3 to 40 parts by weight of the reactive polymer was added so as to be 100 parts by weight in total. The upper limit of the block copolymer PP1 is 97 parts by weight,
This is because it is based on the compounding amount of Example 2, and when it exceeds this, flexibility is impaired as in Comparative Example 1 (the compounding amount is 99 parts by weight), which is not preferable. Further, the lower limit of the blending amount of the block copolymer PP1 was set to 60 parts by weight, based on the blending amount of Example 1. Below this, Comparative Example 2 (the blending amount was set to 50 parts by weight). This is because the tensile elongation and the wear resistance are impaired as in (1). Therefore, it has been found that when the block copolymer PP1 is blended with an appropriate amount of the reactive polymer, the flexibility is not impaired and good tensile elongation, tensile strength and abrasion resistance are maintained. Next, the block copolymer P
A more preferable blending amount of P1 will be described. Comparative Examples 3, 8 and 9 (using the block copolymer PP1 as the base polymer, the total amount of the reactive polymer was 10
0 parts by weight and comparative examples other than those in which the other compounding ingredients were excessively excessive or excessively small) showed good test results in terms of tensile elongation, tensile strength, wear resistance and flexibility. . Then, looking at the compounding amounts of the block copolymer PP1 of the comparative example products 3, 8 and 9, they were 70 parts by weight, 80 parts by weight and 90 parts by weight, respectively. Therefore,
If the overlapping amount of 60 to 97 parts by weight of the block copolymer PP1 of Examples 1 to 5 and 70 to 90 parts by weight of the block copolymer PP1 of Comparative Examples 3, 8 and 9 is taken. The more preferable range of the compounding amount of the block copolymer PP1 can be limited to 70 to 90 parts by weight. By the way, a more preferable range of the amount of the reactive polymer compounded is 10 to 30 parts by weight.

Examples 1 to 5 showed good test results for flame retardancy because 100 parts by weight of the polymer (the total amount of the block copolymer PP1 and the reactive polymer was 100%).
It is considered that the flame retardant is mixed in an amount of 30 to 200 parts by weight with respect to (parts by weight). The maximum amount of flame retardant compounded is 2
The amount of 00 parts by weight is based on the blending amount of Example 4, and when it exceeds this, Comparative Example 4 (the blending amount is 2
This is because properties other than flame retardancy (tensile elongation, abrasion resistance and flexibility) such as 50 parts by weight are unfavorable. Further, the lower limit of the blending amount of the flame retardant is set to 30 parts by weight, based on the blending amount of Example 3, and when it is less than this, Comparative Example 3 (the blending amount is set to 20 parts by weight). This is because the flame retardancy itself is impaired as described above.

In Examples 1 to 5, the reactive polymer was used as a blending component to be blended so as to be 100 parts by weight together with the base polymer. For example, as shown in Comparative Example 5, unmodified This is because when the polymer is used, the tensile elongation, the tensile strength and the flexibility are good, but the abrasion resistance is unacceptable.

In Examples 1 to 5, the block copolymer PP1 having an MFR of 0.7 g / 10 min was used as the base polymer, as shown in Comparative Example 6.
This is because when the block copolymer PP2 having a relatively high value of R of 20 g / 10 min is used, the abrasion resistance and the heat resistances A and B fail. The block copolymer PP1 is used because the random copolymer PP having the same MFR fails in abrasion resistance as shown in Comparative Example 7.

In Examples 1 to 5, the anti-aging agent and the metal deactivator were mixed in appropriate amounts. When the anti-aging agent is too small, heat resistances A and B are impaired as shown in Comparative Example 8. However, if the metal deactivator is not added, the heat resistance B is impaired as shown in Comparative Example 9. The fact that the heat resistances A and B are improved by adding a proper amount of the antiaging agent and the metal deactivator is also derived from Comparative Examples 1 to 5 and 7 which passed the heat resistances A and B (Comparative Example 6 This is because Comparative Example 6 shows an example in which the heat resistance is impaired when the block copolymer PP2 is used as the base polymer.) The blending amount of the antioxidant is from Examples 1 to 5 and Based on Comparative Examples 1 to 5 and 7, it can be said that 1 to 5 parts by weight is an appropriate amount, but as shown in Comparative Example 10, even if the compounding amount of the antioxidant is 12 parts by weight, heat resistance A Since B and B pass (although other properties such as tensile elongation are impaired), it can be said that the compounding amount of the antioxidant may be increased up to about 10 parts by weight. This is because in Comparative Examples 10-1 and 10-2, there is not much difference when comparing each characteristic value determined to be unacceptable with the acceptable value. Therefore, the compounding amount of the antioxidant is 1 to 10
It can be said that parts by weight is preferable, and more preferably 2 to 8 parts by weight. Further, the metal deactivator can be said to be in an appropriate amount of 0.5 to 1 part by weight based on Examples 1 to 5 and Comparative Examples 1 to 5 and 7, but even a small amount may be added. For example, from the comparison between Comparative Example 8 and Comparative Example 9, it can be said that, for example, it is effective in improving the heat resistance A. Also, as shown in Comparative Example 10, the metal deactivator was added in a large amount (8
Even if the amount is 5 parts by weight, the heat resistances A and B pass (although other properties such as tensile elongation are impaired), so the amount of the metal deactivator may be increased up to about 5 parts by weight. I can say. This is because in Comparative Examples 10-1 and 10-2, there is not much difference when comparing each characteristic value determined to be unacceptable with the acceptable value. Therefore, the compounding amount of the metal deactivator is 0.1 to 5
It can be said that the weight part is preferably, but more preferably 0.5 to 3
Parts by weight.

Although one embodiment and example of the present invention have been described above, the present invention is not limited to the above-described one embodiment or example, and does not depart from the spirit of the present invention. Various modifications are possible. For example, in the above various examples, hindered phenol-based antioxidants and copper damage inhibitors were used as compounding ingredients, but in addition to these, processing aids (lubricants, waxes), colorants, flame retardant aids, etc. Agents (zinc borate, silicon flame retardant) and the like may be added.

In short, the gist of the present invention is to prepare a variety of non-halogen insulated wires by adding a flame retardant, an antioxidant and a copper damage inhibitor to a polypropylene base polymer blended with a reactive polymer. An electric wire as a wire harness while maintaining and improving the characteristics and avoiding a bad influence between the non-halogen insulated electric wire and the PVC insulated electric wire and / or the PVC protective material even in a state of being mixed with the PVC insulated electric wire. It is to achieve permanent use by stabilizing the quality and extending the life of the wire.

[0086]

The flame-retardant resin composition according to claim 1 or 2 comprises 100 to 100 parts by weight of 60 to 97 parts by weight of propylene / ethylene-propylene block copolymer and 3 to 40 parts by weight of reactive polymer. Since it is compounded as described above, there is an effect of improving mechanical strength and heat resistance without impairing flexibility and processability. In addition, since the anti-aging agent and the copper anti-corrosion agent are mixed in appropriate amounts, there is an effect that excellent heat aging performance can be maintained.

Since the non-halogen insulated electric wire according to claim 3 is one in which the outer peripheral surface of the twisted wire made of annealed copper wire is coated with the flame-retardant resin composition according to claim 1 or 2, It has the effect of improving mechanical strength and heat resistance without impairing workability. In addition, since the flame-retardant resin composition contains a proper amount of an antioxidant and a copper damage inhibitor, the non-halogen insulated wire can maintain excellent heat aging performance. effective.

A wire harness according to a fourth aspect is a non-halogen insulated wire according to the third aspect, that is, a non-halogen insulated wire in which an antiaging agent and a copper damage inhibitor are mixed in the wire coating material and polyvinyl chloride insulation. Since it is mixed with the electric wire, there is an effect that excellent heat aging performance can be maintained while avoiding the influence of the plasticizer contained in the polyvinyl chloride resin.

[Brief description of drawings]

FIG. 1 is an external perspective view of a non-halogen insulated wire according to an embodiment of the present invention and a commonly used PVC insulated wire.

FIG. 2 is an external perspective view of the wire harness according to the embodiment of the present invention.

FIG. 3 is an external perspective view of the wire harness according to the embodiment of the present invention.

[Explanation of symbols]

10 Non-halogen insulated wire 12 PVC insulated wire 14 conductor 16, 24, 26, 30, 34 Wire harness 18 Mixed electric wire bundle 20 PVC adhesive tape 22 PVC tube 28 PVC sheet 32 Adhesive

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H01B 3/44 H01B 3/44 G 7/00 301 7/00 301 7/295 C08L 101: 08 // ( (C08L 53/00 H01B 7/34 B 101: 08) (72) Inventor Koji Fujimoto 1-14 Nishisuehiro-cho, Yokkaichi-shi, Mie Sumitomo Electric Co., Ltd. F term (reference) 4J002 AC08X AC11X BC05X BP01X BP02W DE076 DE086 DE146 EQ028 EU168 EU178 EU188 FB096 FD037 FD136 FD208 GQ01 5G305 AA02 AA14 AB24 AB25 AB35 BA15 BA22 CA01 CA52 CA55 CC03 CD09 CD13 5G309 AA04 5G315 CA03 CB02 CC08 CD03 CD14

Claims (4)

[Claims] 1. A propylene / ethylene-propylene block copolymer having a polypropylene content of 50 wt% or more and an ethylene propylene content of 10 wt% or less, having a melt flow rate of 0.1 to 5 g / 1.
100 parts by weight of the polymer, which is 100 parts by weight of 60 to 97 parts by weight of propylene / ethylene-propylene block copolymer which is 0 minutes, and 3 to 40 parts by weight of the reactive polymer modified by carboxylic acid anhydride. 30 to 200 parts by weight of metal hydroxide and 1 to 1 of anti-aging agent
A flame-retardant resin composition comprising 0 part by weight and 0.1 to 5 parts by weight of a copper damage inhibitor. 2. The reactive polymer is a modified styrene elastomer, an acid modified ethylene α-olefin copolymer,
The flame-retardant resin composition according to claim 1, which is at least one selected from acid-modified ethylene propylene rubber and acid-modified polyethylene. 3. A non-halogen insulated wire in which the outer peripheral surface of a stranded wire made of annealed copper wire is covered with the flame-retardant resin composition according to claim 1 or 2. 4. A polyvinyl chloride insulated wire in which the outer peripheral surface of a stranded wire made of annealed copper wire is coated with polyvinyl chloride resin,
A wire harness in which the outer peripheral surface of a mixed electric wire bundle in which the non-halogen insulated electric wire according to claim 3 is mixed is covered with a tape-shaped, tube-shaped, or sheet-shaped protective material made of polyvinyl chloride resin.