JP2001143530A - Coating material for electric wire and electric wire using the coating material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a coating material for an electric wire that can prevent an blushing due to external damage or bending blushing at high level and has an excellent cold resistance and abrasion resistance. SOLUTION: In includes component A (polyolefinic resins), component B (acid anhydride modified polyolefinic resins) and component C (magnesium hydroxide surface treated with a coupling agent) as essential components and, if necessary, it may includes component D (magnesium hydroxide surface treated with a fatty acid) and component E (halogen-free rubber not).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating material for an electric wire used for a sheath layer, an insulating layer and the like of an electric wire, and more particularly, it is extremely unlikely to cause whitening and bending whitening, and has excellent cold resistance and abrasion resistance. The present invention relates to an electric wire covering material having a property and an electric wire using the covering material.

[0002]

2. Description of the Related Art Conventionally, when a coating material used for a sheath layer, an insulating layer or the like of an electric wire or cable requires flame retardancy, polyvinyl chloride (hereinafter, referred to as PVC) is used as the coating material. It has been. However, PVC is considered to be a cause of toxic gases such as Diokin and hydrogen chloride gas when electric wire is incinerated. Therefore, the use of PVC has been restricted, and a flame retardant consisting of metal hydroxide has been added to a polyolefin resin with low environmental impact. Blended flame-retardant polyolefins have been used.

As the flame retardant comprising the metal hydroxide, aluminum hydroxide, magnesium hydroxide and the like are generally used. However, a coating material obtained by blending a flame retardant composed of a metal hydroxide with a polyolefin resin has excellent flame retardancy, but particularly when used for a sheath layer, rubs or scratches with other objects. A bend caused by rubbing of wires (for example, rubbing of wires due to misalignment between wires in a braided wire in which a plurality of wires are twisted) (hereinafter also referred to as wound whitening) or bending (Hereinafter, also referred to as bending whitening).

[0004] Whitening of the wound is caused by contact with a guide roll at the time of manufacturing the wire or cable, or by contact with another object at the time of laying the wire or cable. However, since it occurs only on the surface of the sheath layer, the whitening of the wire occurs. Although it does not greatly affect the physical properties of the wire, the appearance (appearance) of the wire is impaired, and the commercial value is reduced. On the other hand, bending whitening occurs when wires are bent in the work of laying wires / cables, etc., and is considered to be caused by microcracks due to peeling of the interface between the metal oxide and the base resin, so that microcracks reach the bottom of the sheath layer. There is a concern that the physical properties of the sheath layer may be degraded by performing the process.

[0005] Japanese Patent No. 2825500 proposes to prevent the whitening of the sheath layer by using magnesium hydroxide surface-treated with an aminosilane-based coupling agent. However, even when magnesium hydroxide surface-treated with such an aminosilane-based coupling agent is used, whitening occurs when the sheath layer is strongly rubbed, and when the base resin (polyolefin resin) of the sheath layer is relatively soft. Whitening (trauma whitening) occurs.

[0006]

SUMMARY OF THE INVENTION In view of the above circumstances, it is a first object of the present invention to provide a coating material for an electric wire in which whitening of a wound and bending whitening are extremely unlikely to occur. It is a second object of the present invention to provide a coating material for an electric wire which is extremely resistant to damage whitening and bending whitening, and has excellent cold resistance and abrasion resistance. It is a third object to provide an electric wire having a sheath layer and / or an insulating layer made of the above-mentioned electric wire covering material.

[0007]

The inventors of the present invention have conducted intensive studies to achieve the above object. As a result, an acid anhydride was added to a base resin composed of a polyolefin resin together with magnesium hydroxide surface-treated with a coupling agent. Blending with a product-modified polyolefin-based resin suppresses whitening at a high level, and found that a coating material for electric wires with improved cold resistance and abrasion resistance can be obtained. Completed.

That is, the present invention has the following features. (1) A coating material for electric wires, comprising the following A component, B component and C component. A component: Polyolefin resin B component: Acid anhydride-modified polyolefin resin C component: Magnesium hydroxide surface-treated with a coupling agent (2) Polyolefin resin of A component is polyethylene, ethylene-vinyl acetate copolymer And at least one selected from ethylene-ethyl acrylate copolymer, wherein the acid anhydride-modified polyolefin-based resin of component B is an ethylene / maleic anhydride binary copolymer, and / or
Alternatively, the coating material for an electric wire according to the above (1), which is an ethylene / maleic anhydride / acrylic ester terpolymer. (3) The coating material for an electric wire according to the above (1) or (2), wherein the coupling agent in the component C is an aminosilane-based coupling agent or an aminotitanate-based coupling agent. (4) The above (1), wherein the compounding amount of the component C is 50 to 150 parts by weight per 100 parts by weight of the total weight of the component A and the component B.
The covering material for electric wires according to any one of (1) to (3). (5) D component: magnesium hydroxide surface-treated with a fatty acid, and the total weight of the A component and the B component is 10
The total blending amount of the C component and the D component per 0 parts by weight is 50 to
150 parts by weight, and [Blending amount of component C] ≧ [D
Component amount], the coating material for an electric wire according to any one of the above (1) to (3). (6) The coating material for an electric wire according to any one of the above (1) to (3), further comprising an E component: a rubber containing no halogen. (7) The covering material for an electric wire according to the above (6), wherein the rubber containing no halogen as the component E is polyisobutylene. (8) D component: magnesium hydroxide surface-treated with a fatty acid, and the total blending amount of C component and D component per 100 parts by weight of the total weight of A component, B component and E component is 50 to 150. The coating material for an electric wire according to the above (6) or (7), wherein the amount is part by weight and [the amount of the component C] ≧ [the amount of the component D]. (9) An electric wire having a sheath layer and / or an insulating layer made of the coating material according to any one of (1) to (8). The “covering material for electric wire” in the present invention means a material for covering an electric wire including a sheath material and / or an insulating material.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The covering material for electric wires of the present invention contains the following components A, B and C as essential components. A component: polyolefin resin B component: acid anhydride-modified polyolefin resin C component: magnesium hydroxide surface-treated with a coupling agent

[0010] In the present invention, the polyolefin resin of the component A is mainly used for mechanical properties such as electrical properties such as insulating property and dielectric constant, flexibility, extensibility, tensile strength and the like required for a covering material for electric wires. Component, chemical properties such as chemical resistance, workability, etc.). As the polyolefin resin, a polyethylene resin or a polypropylene resin is usually used. As the polyethylene resin, a homopolymer of ethylene, a copolymer of ethylene and another vinyl compound, or a mixture thereof is used, and as a copolymer of ethylene and another vinyl compound, ethylene is used. Copolymers with other α-olefins, copolymers of ethylene and vinyl acetate or ethyl acrylate, and the like are preferable.Examples of the α-olefin in the copolymer of ethylene and another α-olefin include, for example,
Propylene, butene-1, pentene-1, 4-methyl-
Examples thereof include 1-pentene, hexene-1, and octene-1. As the polypropylene resin, a homopolymer of propylene, a copolymer of propylene and another vinyl compound, or a mixture thereof is used. As a copolymer of propylene and another vinyl compound, propylene and other vinyl compounds are used. And a copolymer of α with an α-olefin are preferable.
Examples of the olefin include butene-1, pentene-1, 4-methyl-1-pentene, hexene-1, and octene-1. Of these, particularly preferred are polyethylene (PE) and ethylene-vinyl acetate copolymer (EV) in view of mechanical properties and thermal properties.
A), ethylene-ethyl acrylate copolymer (EE
A). Further, polyethylene is preferably low density polyethylene (LDPE) from the viewpoint of acceptability of magnesium hydroxide, and particularly preferably, the density is 0.800 to 0.9.
It is in the range of 30 g / cm ³ . The ethylene-vinyl acetate copolymer has a vinyl acetate content of 5 to 5.
Preferably, the ethylene-ethyl acrylate copolymer has an ethyl acrylate content of 5 to 4% by weight.
Preferably it is 5% by weight. Note that the above density is based on JIS
According to the measuring method specified in K 6922.

The acid anhydride-modified polyolefin resin of the component B is a polyolefin resin containing, as a copolymerization component, an acid anhydride having at least one vinyl group in a molecule, and mainly causes whitening of the coating material. Has the effect of preventing interfacial separation between the resulting magnesium hydroxide and the resin. Examples of the acid anhydride-modified polyolefin resin include α-olefin / acid anhydride binary copolymer, α-olefin / acid anhydride / acrylic compound or vinyl ester compound terpolymer. These may be used alone or in combination.

As the acid anhydride, maleic anhydride,
Preferred are itaconic anhydride, citraconic anhydride, glutaconic anhydride and the like, and particularly preferred is maleic anhydride. The acid anhydride forms a hydrogen bond with the magnesium hydroxide, and a strong adhesive force is obtained between the magnesium hydroxide and the resin, and the interface peeling between the magnesium hydroxide and the resin in the coating material is prevented. You.

As the α-olefin, ethylene, propylene, butene-1 and the like are preferable, and ethylene is particularly preferable. The α-olefin is A of the B component.
It is a component that has an affinity for the component (polyolefin-based resin), and from this viewpoint, as the α-olefin,
It is particularly preferable to use ethylene so as to obtain good affinity for the polyethylene, ethylene-vinyl acetate copolymer, and ethylene-ethyl acrylate copolymer, which are preferred examples of the polyolefin resin of the component A.

As the acrylic compound, acrylic acid, methacrylic acid, methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate and the like are preferred, and ethyl acrylate is particularly preferred. As the vinyl ester compound, vinyl acetate and the like are preferable.

The content of the acid anhydride in the acid anhydride-modified polyolefin resin is, for example, usually 0.05 to 10% by weight, preferably, in the case of an α-olefin / acid anhydride binary copolymer. 0.1 to 5.0% by weight, and in the case of α-olefin / acid anhydride / acrylic compound or vinyl ester compound terpolymer, it is usually 0.05 to 5.0% by weight.
It is 10% by weight, preferably 0.1 to 5.0% by weight. Depending on the compounding ratio of the resin component in the resin coating material and magnesium hydroxide surface-treated with a coupling agent, if the content of the acid anhydride is less than the above range, sufficient whitening prevention effect is obtained. It is difficult to obtain, and when the amount is large, the tensile strength of the coating material tends to decrease.

In the present invention, the terpolymer of α-olefin / acid anhydride / acrylic compound or vinyl ester compound can obtain particularly good results in terms of prevention of whitening. The reason for this is that the acrylic compound or vinyl ester compound reduces the crystallinity of the copolymer, and the decrease in the crystallinity of the copolymer causes magnesium hydroxide and resin due to residual stress generated by molding shrinkage. This is presumably because the peeling of the adhesive portion at the interface with the resin hardly occurs, the adhesive strength of the copolymer is also improved, the adhesive strength between the magnesium hydroxide and the resin is improved, and the effect of preventing whitening is enhanced. In addition, the content of the acrylic compound or vinyl ester compound in the terpolymer is usually
It is 0.1 to 40% by weight, preferably 2 to 30% by weight.

The addition of the acid anhydride-modified polyolefin resin not only provides an effect of preventing the coating material from whitening, but also significantly improves the wear resistance and cold resistance of the material. This is because a strong adhesive force is obtained between the magnesium hydroxide and the resin.

Magnesium hydroxide surface-treated with a coupling agent of component C is subjected to surface treatment with a coupling agent on magnesium hydroxide used as a flame retardant, and adhered to the resin in the coating material of magnesium hydroxide. It is the one with improved performance.

Even if magnesium hydroxide surface-treated with a coupling agent is blended, if the acid anhydride-modified polyolefin resin of the component B is not blended, sufficient anti-whitening effect cannot be obtained, and Even if the acid anhydride-modified polyolefin-based resin of the component B is blended, a sufficient whitening prevention effect cannot be obtained unless magnesium hydroxide surface-treated with a coupling agent is blended. That is, B
Unless both the component and the component C are blended, the adhesive strength between the magnesium hydroxide and the resin in the material cannot be increased to the extent that whitening can be sufficiently prevented.

As the coupling agent, an aminosilane-based coupling agent, an aminotitanate-based coupling agent and the like are preferable, and the average particle size of magnesium hydroxide is usually 0.1 to 20 μm, preferably 0.5 to 5 μm. .

As aminosilane-based coupling agents, γ
-Aminopropyltriethoxysilane, N-β- (aminoethyl) -γ-aminopropyltrimethoxysilane,
γ-ureidopropyltriethoxysilane, γ-anilinopropyltrimethoxysilane, aminobenzenetriethoxysilane, N-4,4′-methylenebisbenzeneamino-cyclohexanolethyltrimethoxysilane,
N-4,4'-methylenebisbenzeneamino-2-hydroxypropyloxypropyltrimethoxysilane, N
-Aminobenzenemethylene-p-phenylene-γ-ureidopropyltrimethoxysilane, N-4,4′-oxybisbenzeneamino-cyclohexanolethyltrimethoxysilane, N-4,4′-oxybisbenzeneamino-2- Hydroxypropyloxypropyltrimethoxysilane, N-aminobenzeneoxy-p-phenylene-γ-ureidopropyltrimethoxysilane, N-
4,4′-sulfonylbenzeneamino-cyclohexanolethyltrimethoxysilane, N-4,4′-sulfonylbenzeneamino-2-hydroxypropyloxypropyltrimethoxysilane, N-aminobenzenesulfonyl-p-phenylene-γ-ureide Propyltrimethoxysilane, Np-phenylenediamino-cyclohexanolethyltrimethoxysilane, Np-phenylenediamino-2-hydroxypropyloxypropyltrimethoxysilane, Np-phenylenediamino-γ −
Ureidopropyltrimethoxysilane and the like,
One or more of these are used.

As aminotitanate coupling agents, γ-aminopropyltriethoxytitanium, N
-Β- (aminoethyl) -γ-aminopropyltrimethoxytitanium, γ-ureidopropyltriethoxytitanium, γ-anilinopropyltrimethoxytitanium, aminobenzenetriethoxytitanium, N-4,4′-methylenebisbenzeneamino -Cyclohexanolethyltrimethoxytitanium, N-4,4'-methylenebisbenzeneamino-2-hydroxypropyloxypropyltrimethoxytitanium, N-aminobenzenemethylene-p-phenylene-γ-ureidopropyltrimethoxytitanium, N-
4,4′-oxybisbenzeneamino-cyclohexanolethyltrimethoxytitanium, N-4,4′-oxybisbenzeneamino-2-hydroxypropyloxypropyltrimethoxytitanium, N-aminobenzeneoxy-p-phenylene-γ -Ureidopropyltrimethoxytitanium, N-4,4'-sulfonylbenzeneamino-cyclohexanolethyltrimethoxytitanium, N-4,
4′-sulfonylbenzeneamino-2-hydroxypropyloxypropyltrimethoxytitanium, N-aminobenzenesulfonyl-p-phenylene-γ-ureidopropyltrimethoxytitanium, Np-phenylenediamino-cyclohexanolethyltrimethoxytitanium , N-
Examples thereof include p-phenylenediamino-2-hydroxypropyloxypropyltrimethoxytitanium, Np-phenylenediamino-γ-ureidopropyltrimethoxytitanium, and one or more of these are used. .

The surface treatment method of magnesium hydroxide with a coupling agent is not particularly limited, and is a general method, for example, a so-called slurry in which magnesium hydroxide is charged into an alcohol solution of the coupling agent, treated, and then dried. For example, a dry method in which a coupling agent is directly sprayed on a magnesium hydroxide powder is used. The amount of the coupling agent to be used varies depending on the type of the coupling agent, but is usually 0.002 to 5.0 parts by weight, preferably 0.1 to 3.0 parts by weight, per 100 parts by weight of magnesium hydroxide. It is.

As will be described later in detail, in the present invention, apart from the component A and the component B, furthermore, the component E: halogen May be compounded. In a mode in which the E component is not blended, that is, when the polymer component in the coating material is composed of the A component and the B component, the blending weight ratio of the A component and the B component (A component: B
Component) is usually 99: 1 to 50:50, preferably 9
7: 3 to 65:35. When the amount of the component B is out of this range and the amount of the component B is increased (the amount of the component A is reduced), the mechanical strength such as the tensile strength of the coating material and the heat resistance tend to decrease, and the amount of the component B is reduced ( When the amount of the component A increases), the whitening prevention effect tends to decrease, and the abrasion resistance and cold resistance of the coating material tend to decrease.

In this type of coating material, when magnesium hydroxide is used as a flame retardant, in order to obtain sufficient flame retardancy, generally 50 to 200 parts by weight of magnesium hydroxide is used per 100 parts by weight of the polymer component in the material. In general, the coating material of the present invention also contains 100 parts by weight of the polymer component (that is, the E component) of the coating material in the coating material of the present invention. In the embodiment in which the rubber containing no halogen is blended, the total blending amount of the component A and the component B is 100 parts by weight, and in the embodiment in which the rubber containing no halogen of the component E described later is blended, the sum of the components A, B and E The amount is usually 50 to 150 parts by weight, preferably 7 to 100 parts by weight.
0 to 130 parts by weight are blended. When the amount of the C component is out of the above range, the flexibility, elongation, scratch whitening resistance, bending whitening resistance, and the like of the coating material tend to decrease. When the amount decreases, the flame retardancy of the coating material decreases. Show a tendency to.

For the purpose of improving the elongation and abrasion resistance of the coating material, a fatty acid (preferably having 15 carbon atoms) is used instead of a part of the magnesium hydroxide surface-treated with the C component coupling agent. Magnesium hydroxide (D component) subjected to the surface treatment in (20) to (20) may be blended. Specific examples of the fatty acid include, for example, palmitic acid, stearic acid,
Oleic acid, linoleic acid, linolenic acid and the like can be mentioned. In this case, the amount of magnesium hydroxide surface-treated with the fatty acid needs to be smaller than the amount of magnesium hydroxide surface-treated with the coupling agent.
This is because if the amount of magnesium hydroxide surface-treated with a fatty acid is equal to or greater than that of magnesium hydroxide surface-treated with a coupling agent, the coating material may not be able to sufficiently prevent damage whitening and bending whitening. Because there is.

In the present invention, magnesium hydroxide and resin
In order to further reduce the impact force applied to the adhesive interface,
E component: Even if rubber containing no halogen is compounded in an appropriate amount
Well, by blending the E component, whitening of the wound of the coating material,
Bending whitening is prevented at a higher level. Of the E component
Halogen-free rubber has a tensile modulus of 50MP
a means rubber containing no halogen or less, for example,
Polyisobutylene, butyl rubber, ethylene-propylene
Rubber (EPM, EPDM), silicone rubber, vinyl acetate
Ethylene-vinyl acetate copolymer containing 40 to 60% by weight of
United (EVA), ethylene-propylene copolymer and poly
Dynamic cross-linked products with propylene (for example, Santoprene (D
-Ess Japan, product name)), density 0.91
g / cm ^ThreeThe following 1-butene homopolymer (for example,
Tuffmer A (Mitsui Chemicals, trade name)) and the like.
You. A component polyolefin resin and B component acid anhydride
Elastic modulus of the product-modified polyolefin resin is 50 MPa
Larger and have a rubbery elasticity like the E component.
Not. For example, the same ethylene-propylene copolymer
Even if the material has a tensile modulus of 50% or less, the E component
With tensile modulus greater than 50 MPa
Is used as the A component. The tensile modulus here
Is a value measured by the measurement method of JIS K 7113.
You.

In the embodiment in which the E component is blended, the blend ratio of the E component ((A component + B component): E component) with respect to the total blend amount of the A component and the B component in the coating material is as follows:
Usually, the ratio is 99.5: 0.5 to 90:10 (weight ratio), preferably 99: 1 to 95: 5. When the amount of the component E is out of the above range, the mechanical strength such as the tensile strength of the coating material and the heat resistance tend to decrease, and when the amount is low, the effect of the compounding of the component E is hardly obtained.

The coating material of the present invention may contain an appropriate amount of a known halogen-free auxiliary material used in this type of field. Such auxiliary materials include stabilizers, antioxidants, fillers, coloring agents, carbon black, crosslinking agents, lubricants, processability improvers, antistatic agents and the like.

The coating material of the present invention comprises the above-mentioned components A to C, the above components A to D, the above components A to C and E, or the above components A to E, if desired, and And kneading with a known kneading device such as a Banbury mixer, a pressure kneader, a twin-screw extruder and the like, and molding the kneaded product into a desired form by injection molding, extrusion molding, rotational molding, press molding or the like. It is manufactured by.

The covering material for electric wires of the present invention has a high level of prevention of whitening of wounds and whitening of bending, and has excellent cold resistance and abrasion resistance. Although it can be used, it is particularly suitable for the sheath layer from the viewpoint of preventing whitening.

[0032]

The present invention will be described in more detail with reference to examples and comparative examples, but the present invention is not limited to these examples.

(Examples 1 to 7, Comparative Examples 1 to 5) The components shown in the upper column of Table 1 were put into a Banbury mixer (manufactured by Toyo Seiki Seisakusho) at once, kneaded for 20 minutes, and then pressed at 160 ° C. For 10 minutes to prepare test sheets and test pieces for each example and each comparative example, and the following evaluation tests were performed for each. The amounts of the components are parts by weight. MFR of LDPE, EEA, and ethylene / maleic anhydride / ethyl acrylate terpolymer
(Melt flow rate) is a measured value according to JIS K 6992. The D hardness of LDPE and EEA is a value based on the durometer method. The intrinsic viscosity of polyisobutylene is a value measured using diisobutylene as a solvent.

[Evaluation Test] Tensile Properties Tensile strength (MPa) of a test sheet having a thickness of 1 mm
And elongation (%) were measured according to JIS K7113.・ Cold resistance For a test sheet with a thickness of 2 mm, JIS C 300
Performed according to 5. The test temperature was −50 ° C. and evaluated in three stages: no crack (無 し), crack (△), and fracture (×).・ Abrasion resistance For a test sheet having a thickness of 1 mm, JIS K690
Measure the amount of weight loss after 1000 rotations in the abrasion test according to 2. The wear wheel used was H-18 manufactured by Taba Co., and the load was 4.9N. -Bending whitening resistance A test piece having a thickness of 1 mm, a width of 20 mm, and a length of 100 mm was prepared, bent twice at 180 degrees, and the degree of whitening was visually observed. No whitening (３), partial whitening (△), and overall whitening (x). -Injury whitening resistance The degree of whitening of the abraded part of the sample after the abrasion resistance test was evaluated in three stages: whitening without whitening (○), partial whitening (△), and full whitening (x). These test results are shown in the lower column of Table 1.

[0035]

[Table 1]

From Table 1, it can be seen that Examples 1 to 7 have no bending whitening or damage whitening, and have excellent cold resistance and abrasion resistance. Further, in Example 5 in which magnesium hydroxide surface-treated with a coupling agent and magnesium hydroxide surface-treated with a fatty acid were used in combination, the abrasion resistance and elongation were higher than those of Examples 1 and 3. Better results have been obtained. On the other hand, in Comparative Examples 1 to 3 in which magnesium hydroxide surface-treated with a coupling agent was not blended, bending whitening and wound whitening occurred, and Comparative Example 4 in which no acid anhydride-modified polyolefin resin was blended. In Nos. 5 and 5, bending whitening and wound whitening occur, and the abrasion resistance is greatly reduced.

[0037]

As is apparent from the above description, in the present invention, by mixing an acid anhydride-modified polyolefin-based resin with magnesium hydroxide surface-treated with a coupling agent, hydroxylation in the material is prevented. An electric wire with improved adhesion between magnesium and resin, no whitening or bending whitening, and excellent cold and abrasion resistance
A coating material for the cable can be obtained.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C08L 23/26 C08L 23/26 5G305 C09D 123/00 C09D 123/00 H01B 3/44 H01B 3/44 F / / C08J 5/18 CES C08J 5/18 CES (72) Inventor Nozomu Fujita No. 8 Nishinocho, Higashikojima, Hyogo Prefecture Inside Mitsubishi Electric Wire Industry Co., Ltd. (72) Inventor Yoshiaki Ueda Nishinocho, Higashikojima, Hyogo Prefecture 8 Mitsubishi Electric Wire & Cable Co., Ltd. (72) Kazuyuki Ogura Inventor Kazuyuki 8 Higashi-Mukojima Nishinocho, Amagasaki City, Hyogo F-term (reference) 4F071 AA10 AA15 AA15X AA21 AA28X AA33X AA36X AB18 AF39 AH12 BA01 BB03 BB05 BB06 BC07 4F100 AA18A AB01B AH03A AH06A AH08A AK03A AK04A AK08A AK68A AK70A AL07A AN00A AN02A BA02 CA23A DD31 GB46 JK09 JL11 4J00 2 BB00W BB03W BB06W BB07W BB18Y BB21X DE076 DE077 FB086 FB146 FB166 FB237 FD016 FD017 GQ01 4J038 CB001 CB021 CB051 CB061 CB072 ABCB AB01 CA03 BA02A0212 CB132 CB142 HA216 KA14 PB09 CA47 CA51 CA55 CB16 CB26 CB27 CC03 CD06 CD13

Claims (9)

[Claims] 1. An electric wire covering material comprising the following components A, B and C: A component: polyolefin resin B component: acid anhydride-modified polyolefin resin C component: magnesium hydroxide surface-treated with a coupling agent 2. The polyolefin resin of component A is at least one selected from polyethylene, ethylene-vinyl acetate copolymer and ethylene-ethyl acrylate copolymer, and the acid anhydride-modified polyolefin resin of component B is 2. The coating material for an electric wire according to claim 1, wherein the coating material is an ethylene / maleic anhydride binary copolymer and / or an ethylene / maleic anhydride / acrylic ester terpolymer. 3. The coating material for an electric wire according to claim 1, wherein the coupling agent in the component C is an aminosilane-based coupling agent or an aminotitanate-based coupling agent. 4. The coating material for an electric wire according to claim 1, wherein the compounding amount of the component C is 50 to 150 parts by weight per 100 parts by weight of the total weight of the components A and B. 5. The composition further comprises D component: magnesium hydroxide surface-treated with a fatty acid, and the total blending amount of the C component and the D component is 50 to 150 weight per 100 weight parts of the total weight of the A component and the B component. The coating material for an electric wire according to any one of claims 1 to 3, wherein the amount of the component (C) and the component (D) are satisfied. 6. The coating material for an electric wire according to claim 1, further comprising an E component: a rubber containing no halogen. 7. The coating material for an electric wire according to claim 6, wherein the halogen-free rubber of the component E is polyisobutylene. 8. The composition further comprises D component: magnesium hydroxide surface-treated with a fatty acid, and the total blending amount of the C component and the D component per 100 parts by weight of the total weight of the A component, the B component, and the E component is 50. The coating material for electric wires according to claim 6, wherein the amount is from 150 to 150 parts by weight, and [the amount of the component C] ≧ [the amount of the component D]. 9. An electric wire having a sheath layer and / or an insulating layer made of the coating material according to claim 1. Description: