JP2001312925A - Insulated electrical wire and cable having resistance to heat deterioration, properties for water resistance and insulation, and fire retardance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fire-retardant covered electric wire, cable, and synthetic resin mold superior in resistance to heat deterioration, properties for water resistance and insulation, and resistance to weathering where a toxic gas, such as a halogen gas or the like will not generated during combustion. SOLUTION: An electrical wire and a cable coated with a resin composition having resistance to heat deterioration, properties for water resistance and insulation and fire-retardance, and a mold formed of the resin composition are composed by blending magnesium hydroxide particles of 10 to 500 pts.wt., and an antioxidant and/or a metal inactivator of 0.01 to 10 pts.wt. based on a synthetic resin of 100 pts.wt. The magnesium hydroxide particles has an average diameter of secondary particles of 10 μm or smaller as measured by a laser diffraction scattering method, where the specific surface by a BET method is 20 m2/g or lower, the total content of Fe compounds and Mn compounds is 0.02 wt.% or lower when converted into metal equivalence, and the total content of water-soluble alkali metal compounds is 0.05 wt.% or lower when converted into alkali metal equivalent.

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 which has no or little generation of harmful gases such as halogen-based gases during combustion, and has excellent heat deterioration resistance, water insulation and weather resistance. And an electric wire and a cable covered with the same. Furthermore, the present invention relates to a molded article formed from the resin composition.

[0002]

2. Description of the Related Art The demand for flame retardancy for synthetic resins is increasing year by year and is becoming more severe. In order to respond to such a demand for flame retardancy, heretofore, a flame retardant using an organic halide and antimony trioxide in combination has been proposed and widely practiced. However, this flame retardant partially decomposes during molding to generate halogen gas, which corrodes processing and molding machines, is toxic to workers, has a bad influence on the heat resistance or weather resistance of resins and rubber. And various problems such as generation of a large amount of smoke containing harmful gas and combustion of dioxin when the molded article after use is burned.

[0003] With regard to coating materials such as electric wires, cables, wire harnesses for automobiles, and tubes for electronic devices such as personal computers, a high level of flame retardancy is required due to the high performance, high functionality and high density of urban functions. It has become.
Conventionally, insulators and sheathing materials such as electric wires, cables, and heat-shrinkable tubes such as wire harnesses and electric wires for personal computers are flammable. In many cases, the demand for flame-retardant electric wires and cables has increased, and various studies have been made.

[0004] In the case of flame-retarding polyolefin and halogen-based resins that have been used for electrical insulation, a method of blending a halogen-containing compound as a flame retardant has been generally performed. Such a flame-retardant electrical insulating composition generates a large amount of non-flammable halogen-based gas at the time of fire, and as a result,
'O necessary for continuous combustion around electric wires and cables
It traps radicals such as H and 'O, carbonizes electric wires and cables, blocks oxygen, and prevents combustion, and has an excellent flame retardant effect. However, the halogen-based gas generated at that time is harmful to the human body, and furthermore, the halogen-based gas reacts with moisture in the air to form hydrohalic acid, corrode equipment and the like, and cause environmental pollution. Under these circumstances, the demand for flame retardants that are safe for the human body and generate less corrosive gas has increased due to the addition of metal hydroxides to polyolefins. Was proposed in JP-A-1-108235 and JP-A-5-247281.

A method has also been proposed for blending a metal hydroxide in an insulated wire coated with an insulating material made of polyvinyl chloride, such as a wire harness wire [see Japanese Patent Application Laid-Open No. 10-298380]. Various proposals have also been made regarding flame retardancy of other molded products other than electric wires. Among the hydroxides, aluminum hydroxide has a dehydration reaction starting at about 200 ° C., and most polymers are thermally decomposed at the processing temperature to foam a molded article. In the case of calcium hydroxide, the dehydration temperature starts at about 450 ° C and is about 55 ° C.
Since dehydration is completed at 0 ° C., the dehydration temperature is higher than the combustion temperature of the polymer, and the combustion effect is considerably inferior to that of magnesium hydroxide.

The combination of these hydroxides is disclosed in
JP-A-181305 proposes a combination of aluminum hydroxide and magnesium hydroxide, but has the disadvantage that it can be applied only to those having a processing temperature lower than 200 ° C. because aluminum hydroxide is also used. As a polymer flame retardant, it is necessary not to dehydrate and decompose at the processing temperature of the polymer, but to dehydrate at a temperature that overlaps with the burning temperature of the polymer as much as possible. Limited to magnesium hydroxide.

Magnesium hydroxide has a dehydration start temperature of about 3
Since it is 40 ° C., it is applied to most resins. Magnesium hydroxide has properties suitable for various flame-retardant molded products, especially flame-retardant insulated wires and cables, when it is mixed with resin.
It turned out that there was a problem to be solved.

That is, in order to mix magnesium hydroxide particles with a synthetic resin and pass the VO standard with a thickness of 1/8 inch to 1/16 inch in the UL-94 flame retardant standard, the resin 100 It is necessary to add about 150 to 250 parts by weight of magnesium hydroxide particles based on parts by weight. The blending of such a relatively large amount of magnesium hydroxide particles promotes deterioration of the molded article due to heating during molding and heating during use, and the physical properties inherent in the molded article, particularly, Izod impact strength, elongation, tensile strength, etc. This causes a problem of reducing the noise. The present invention provides a new excellent heat-resistant and water-resistant insulation, a heat-resistant and water-resistant insulation and a flame-retardant molded article and a wire and a cable excellent in weather resistance, which are basically composed of magnesium hydroxide particles that have solved the above problems. (Including wire harnesses for automobiles).

The present inventors have studied the purity and physical properties of the magnesium hydroxide particles used in order to achieve the above object in an industrial sense. as a result,
The amount of the specific metal compound as an impurity in the magnesium hydroxide particles, the value of the average secondary particle diameter and the value of the specific surface area are:
It has been found that they mutually affect the thermal deterioration of the resin, and it has been found that by setting these to certain specific values, a molded article having excellent heat deterioration resistance can be obtained, and the present invention has been achieved. In that case, however, it was also found that a certain amount of antioxidants and / or metal deactivators had to be added to the molded articles. In other words, it was also found that a molded article excellent in heat deterioration resistance would not be obtained no matter how much the magnesium hydroxide particles were used unless these additives were added.

[0010] Magnesium hydroxide particles contain various impurities mainly in the raw material during the production process, and there are impurities due to mixing of equipment materials due to corrosion and friction of the equipment. It is mixed as a solid solution or contaminant in the magnesium oxide particles. According to the study of the present inventors, in various impurities, when an iron compound and a manganese compound are present in trace amounts, not only as impurities but also as solid solutions, they affect the thermal degradation of the resin. It was found to give. They also found that the water-soluble alkali metal salt in the magnesium hydroxide particles affected the water-resistant insulation.

Thus, according to the study of the present inventors, high-purity magnesium hydroxide particles containing iron compounds and manganese compounds as impurities and water-soluble alkali metal salts in a certain amount or less, and having an average secondary particle diameter of Value of 10μ
m (that is, this means that most of the particles are primary particles that are not secondary aggregated), and the specific surface area of the magnesium hydroxide particles is 20 m ² / g or less. By blending a certain amount of antioxidant and / or metal deactivator into the synthetic resin, it has excellent mechanical strength, less deterioration in physical properties due to thermal degradation, and excellent flame resistance, which is also excellent in water insulation. It was found that a molded article having the same was obtained. Furthermore, according to the study of the present inventors, it has been found that a molded article having further excellent weather resistance can be obtained by further adding an ultraviolet absorber and / or a light stabilizer to the composition.

[0012]

According to the present invention, (a)
A resin composition comprising (b) 10 to 500 parts by weight of magnesium hydroxide particles and (c) 0.01 to 10 parts by weight of an antioxidant and / or a metal deactivator based on 100 parts by weight of the synthetic resin, The magnesium hydroxide particles have the following requirements (i) to (iv): (i) an average secondary particle diameter measured by a laser diffraction scattering method of 10 μm or less; (ii) a BET specific surface area of 20 m ² / g or less (iii) ) The total content of Fe compounds and Mn compounds is 0.02% by weight or less in terms of metal. (Iv) The total content of water-soluble alkali metal compounds is 0.05% by weight or less in terms of alkali metal. The present invention provides a heat-resistant, water-resistant, insulating, flame-retardant insulated wire and cable coated with a resin composition satisfying the following.

According to the present invention, the resin composition further comprises (d) an ultraviolet absorber and / or a light stabilizer in an amount of 0.0.
By adding 1 to 10 parts by weight, an electric wire and a cable having further excellent weather resistance are also provided. According to the present invention, when the magnesium hydroxide particles (b) of the resin composition have a content of (iv) a water-soluble alkali metal salt of 0.05% by weight or less in terms of alkali metal, An insulated wire and cable having excellent insulation properties are provided.

Hereinafter, the present invention will be described in more detail. The magnesium hydroxide particles used in the present invention have an average secondary particle diameter of 10 μm measured by a laser diffraction scattering method.
Or less, preferably 5 μm or less, more preferably 0.5 μm or less.
２2 μm, with little or no secondary aggregation. In addition, BET of magnesium hydroxide particles
The specific surface area by the method is 20 m ² / g or less, preferably 1 to
11m ² / g, more preferably those of 3 to 8 m ² / g. Further, the magnesium hydroxide particles used in the present invention have a total amount of iron compound and manganese compound as impurities of 0.02% by weight or less, preferably 0.01% by weight or less in terms of metal (Fe + Mn). The alkali metal salt is 0.1 in alkali metal (Na, K, Li) conversion.
It is not more than 0.05% by weight, preferably not more than 0.03% by weight, more preferably not more than 0.003% by weight.

As described above, the magnesium hydroxide particles used in the present invention are converted into metal (Fe + M) as impurities.
The total amount of n) is within the above range, and more preferably, the content of the heavy metal compound as a metal including the content of the cobalt compound, the chromium compound, the copper compound, the vanadium compound and the nickel compound is within the above range. Desirably. That is, the magnesium hydroxide particles are (Fe + Mn + Co + Cr + Cu + V + Ni) as a metal.
It is preferable that the total content is not more than 0.02% by weight, preferably not more than 0.01% by weight.

As the content of heavy metal compounds such as iron compounds and manganese compounds in the magnesium hydroxide particles increases,
Causes the thermal stability of the resin composition to be significantly reduced,
When the content of the water-soluble alkali metal salt is more than 0.05% by weight in terms of alkali metal, there is a problem that the water resistance of the resin composition is remarkably reduced. However, the total content of the iron compound and the manganese compound in the magnesium hydroxide particles only satisfies the above range, the thermal stability of the resin is excellent, and the mechanical strength of the resin is not impaired. It is necessary that the average secondary particle diameter and the BET specific surface area satisfy the respective ranges. As the average secondary particle diameter of the magnesium hydroxide particles increases, the contact surface with the resin decreases and the thermal stability of the molded product improves, but problems such as a decrease in mechanical strength and poor appearance arise.

As described above, the magnesium hydroxide particles have (i) an average secondary particle diameter, (ii) a BET specific surface area,
(Iii) If the total content of the iron compound and the manganese compound (or the total amount of other heavy metal compounds) is within the above range, the compatibility with the resin, the dispersibility, the thermal stability, the moldability and the processability, and the molded article. Thus, a molded product satisfying all the properties such as appearance, mechanical strength and flame retardancy can be obtained. If the magnesium hydroxide particles have a content of (iv) a water-soluble alkali metal salt of 0.05% by weight or less in terms of alkali metal, a molded article excellent in water-resistant insulation properties can be obtained.

However, in this case, in order to impart high water-resistant insulation to the molded article, the magnesium hydroxide particles are previously surface-treated with the following surface treatment agent, or kneaded with a resin or other compounding agent. When the surface treatment agent is added and kneaded together, the surface of the magnesium hydroxide particles is covered with various surface treatment agents by a surface treatment agent at a final stage of forming a molded product. It is necessary.

The magnesium hydroxide particles used in the present invention can be used as they are as a flame retardant having heat resistance and deterioration in a resin, but those treated with a surface treating agent can also be used. As such a surface treatment agent,
Examples include at least one selected from the group consisting of higher fatty acids, anionic surfactants, phosphate esters, coupling agents (silane-based, titanate-based, aluminum-based), and esters of polyhydric alcohols and fatty acids.

The following are examples of those preferably used as the surface treating agent. Higher fatty acids having 10 or more carbon atoms, such as stearic acid, erucic acid, palmitic acid, lauric acid, and behenic acid; higher fatty acid salts; sulfate salts of higher alcohols such as stearyl alcohol and oleyl alcohol; sulfate salts of polyethylene glycol ether; Amide bond sulfate, ester bond sulfate, ester bond sulfonate, amide bond sulfonate, ether bond sulfonate, ether bond alkylaryl sulfonate, ester bond alkylaryl sulfonate, amide bond alkylarylsulfonic acid Anionic surfactants such as salts; orthophosphoric acid and mono- or di-esters such as oleyl alcohol and stearyl alcohol or a mixture of both, and their acid forms or alkali metal salts or amine salts; Acid esters: r- (2-aminoethyl) aminopropyltrimethoxysilane, r- (2-aminoethyl) aminopropylmethyldimethoxysilane, r-methacryloxypropyltrimethoxysilane, N-β- (N-vinyl Benzylaminoethyl) -r-aminopropyltrimethoxysilane hydrochloride, r-glycidoxypropyltrimethoxysilane, r-mercaptopropyltrimethoxysilane, methyltrimethoxysilane, methyltriethoxysilane, vinyltriacetoxysilane, r -Chloropropyltrimethoxysilane, hexamethyldisilazane, r
-Anilinopropyltrimethoxysilane, vinyltrimethoxysilane, octadecyldimethyl [3- (trimethoxysilyl) propyl] ammonium chloride, r-
Chloropropylmethyldimethoxysilane, r-mercaptopropylmethyldimethoxysilane, methyltrichlorosilane, dimethyldichlorosilane, trimethylchlorosilane, vinyltrichlorosilane, vinyltriethoxysilane, vinyltris (β-methoxyethoxy) silane, β
-(3,4 epoxycyclohexyl) ethyltrimethoxysilane, r-glycidoxypropylmethylethoxysilane, r-glycidoxypropyltriethoxysilane,
r-methacryloxypropylmethyldimethoxysilane,
r-methacryloxypropylmethyldiethoxysilane,
r-methacryloxypropyltriethoxysilane, N-
β (aminoethyl) r-aminopropylmethyldimethoxysilane, N-βaminoethyl) r-aminopropyltrimethoxysilane, N-β (aminoethyl) r-aminopropyltriethoxysilane, r-aminopropyltrimethoxysilane, r-aminopropyltriethoxysilane, N-phenyl-r-aminopropyltrimethoxysilane, γ-glycidoxypropyltrimethoxysilane,
silane coupling agents such as γ-methacryloxypropyltrimethoxysilane; isopropyl triisostearoyl titanate, isopropyl tris (dioctyl pyrophosphate) titanate, isopropyl tri (N
-Aminoethyl-aminoethyl) titanate, isopropyltridecylbenzenesulfonyl titanate, tetraoctylbis (ditridecylphosphite) titanate, bis (dioctylpyrophosphate) oxyacetate titanate, isopropyltridodecylbenzenesulfonyl titanate, tetraisopropylbis (dioctyl) (Phosphite) titanate, tetra (2,2)
-Diallyloxymethyl-1-butyl) bis- (ditridecyl) phosphite titanate, bis (dioctylpyrophosphate) ethylene titanate, isopropyltrioctanoyl titanate, isopropyldimethacrylisostearoyl titanate, isopropylisostearoyldiacryl titanate, isopropyltriate (Dioctyl phosphate) titanate coupling agents such as titanate, isopropyltricumylphenyl titanate, dicumylphenyloxyacetate titanate, diisostearoylethylene titanate; aluminum-based coupling agents such as acetoalkoxyaluminum diisopropylate; triphenyl Phosphite, diphenyl tridecyl phosphite, phenyl
Ditridecyl phosphite, phenyl isodecyl phosphite, tri nonylphenyl phosphite, 4,
Esters of fatty acids with polyhydric alcohols such as glycerin monostearate and glycerin monooleate, such as 4'-butylidene-bis (3-methyl-6-t-butylphenyl) -ditridecyl phosphite and trilauryl thiophosphite .

The surface coating of the magnesium hydroxide particles using the above-mentioned surface treating agent can be carried out by a known wet or dry method. For example, as a wet method, the surface treating agent is added in a liquid or emulsion state to a slurry of magnesium hydroxide, and is added for about 2 hours.
What is necessary is just to mix mechanically sufficiently at the temperature of 00 degreeC or less. As a dry method, a surface treatment agent may be added in a liquid, emulsion, or solid state under sufficient stirring with a mixer such as a Henschel mixer, and the magnesium hydroxide powder may be sufficiently mixed with or without heating. The amount of the surface treatment agent can be appropriately selected, but is preferably about 10% by weight or less based on the weight of the magnesium hydroxide particles. The surface treating agent may be added when kneading the magnesium hydroxide particles and the synthetic resin.

However, when the surface treatment agent of the alkali metal salt is added to the synthetic resin at the time of kneading, the surface treatment agent should be carefully controlled to be 0.05% by weight or less with respect to the magnesium hydroxide particles in terms of the alkali metal. It is necessary to add. Otherwise, the water-resistant insulation, which is an essential object of the present invention, cannot be imparted to electric wires, cables, and molded products. The magnesium hydroxide particles having been subjected to the surface treatment can be subjected to a method such as washing with water, dehydration, granulation, drying, pulverization, and classification, as appropriate, and carried out to obtain a final product form. In particular, it is preferable that the dehydration and water washing be sufficiently performed to reduce the content of the water-soluble alkali metal salt.

Since the magnesium hydroxide particles have a weak point in acid resistance, in the present invention, the surface of the magnesium hydroxide particles is acid-resistant coated with at least one selected from the group consisting of a silicon compound, a boron compound and an aluminum compound.
If necessary, the surface may be additionally treated with at least one or more surface treatment agents selected from the group of the higher fatty acids, titanate coupling agents, silane coupling agents, aluminate coupling agents, alcohol phosphate esters and the like. By using the treated magnesium hydroxide particles, a molded article having high acid resistance can be obtained.

As the acid-resistant coating agent, silicon compounds include sodium silicate such as sodium metasilicate and sodium orthosilicate; potassium silicate such as potassium metasilicate and potassium orthosilicate; and water glass; , Sodium tetraborate, sodium metaborate, potassium tetraborate, potassium metaborate; aluminum compounds such as sodium orthoaluminate, sodium aluminate such as sodium metaaluminate, aluminate such as potassium orthoaluminate and potassium metaaluminate Examples include aluminum salts of mineral acids such as potassium acid, aluminum chloride, aluminum nitrate, aluminum sulfate, and aluminum phosphate.

These acid-resistant coating agents are coated at 2% by weight or less based on the magnesium hydroxide particles. Even if the coating is performed at 2% by weight or more, the acid resistance is not particularly improved, and the workability of dewatering and filtering after surface treatment by a wet method is deteriorated. The magnesium hydroxide particles used in the present invention are blended in an amount of 10 to 500 parts by weight, preferably 30 to 400 parts by weight, more preferably 50 to 300 parts by weight, based on 100 parts by weight of the resin. If the amount is less than 10 parts by weight, the flame retardancy of the molded article may be insufficient. If the amount exceeds 500 parts by weight, the mechanical strength of the molded article may be reduced.

The synthetic resin in which the magnesium hydroxide particles used in the present invention are blended may be any resin that is generally used as a covering material for electric wires and cables, and examples thereof include polyethylene, polypropylene, and ethylene / propylene. polymers, butene-1, pentene-1, hexene-1, such as such as octene-1, copolymers of α- olefin and ethylene C ₃ -C _12, copolymers of these α- olefin and a diene , Ethylene-acrylate copolymer, polystyrene, ABS resin, AAS resin, AS resin, MBS resin, ethylene / vinyl chloride copolymer resin, ethylene-vinyl acetate copolymer resin, ethylene-vinyl chloride-vinyl acetate graft resin, vinylidene chloride, polyvinyl chloride Vinyl, chlorinated polyethylene, chlorinated polypropylene, PVC copolymer, vinyl acetate resin And thermoplastic resins such as urethane resin, phenoxy resin, polyacetal, polyamide, polyimide, polycarbonate, polysulfone, polyphenylene oxide, polyphenylene sulfide, polyethylene terephthalate, polybutylene terephthalate, methacrylic resin, TPO (thermopolyolefin), and ionomer resin. Among these, it is preferable that the resin is substantially free of halogen.

Preferred examples of these thermoplastic resins are polyolefins or copolymers thereof which are excellent in the flame retardant effect, heat deterioration preventing effect, water resistant insulating effect and mechanical strength retention characteristics of magnesium hydroxide particles, Specifically, polypropylene homopolymer, polypropylene resin such as ethylene propylene copolymer, high density polyethylene, low density polyethylene, linear low density polyethylene, ultra low density polyethylene, EVA (ethylene vinyl acetate resin), EEA (Ethylene ethyl acrylate resin), EMA (ethylene methyl acrylate copolymer resin), EAA (ethylene acrylate copolymer resin), polyvinyl butyral resin (PVB), polyvinyl alcohol resin (PVA), polyethylene such as ultra high molecular weight polyethylene Tree , And butene-1, pentene -
1, hexene-1, the C ₃ -C _12, such as octene -1 alpha-
It is a copolymer of olefin and ethylene and TPO.

Further, an epoxy resin, a phenol resin,
Thermosetting resins such as melamine resin, unsaturated polyester resin, alkyd resin, urea resin and EPM, EPD
M, butyl rubber, isoprene rubber, SBR, NBR, chlorosulfonated polyethylene, NIR, urethane rubber,
Examples thereof include synthetic rubbers such as butadiene rubber, acrylic rubber, silicone rubber, and fluoro rubber. In the present invention, the synthetic resin used is not limited by the production method.For example, in the case of a polyolefin, the polymerization catalyst was produced using any metallocene, Ziegler, Ziegler-Natta, Friedel Kraft, etc. It may be something.

The molded article of the present invention comprises (a) the synthetic resin and (b) magnesium hydroxide particles (c) an antioxidant and / or a metal deactivator and, if necessary, (d) an ultraviolet absorber and / or light It is basically formed of a stabilizer, but may further contain a small amount of a flame retardant auxiliary (e) if necessary. By blending the flame retardant aid (e), the blending ratio of (b) magnesium hydroxide particles can be reduced, and the flame retardant effect can be increased.

The flame retardant aid (e) is preferably red phosphorus, a phosphoric ester, carbon powder, a silicone compound or a mixture thereof. As the red phosphorus, for example, red phosphorus whose surface is coated with a thermosetting resin, a polyolefin, a carboxylic acid polymer, titanium oxide, or a titanium aluminum condensate can be used in addition to ordinary red phosphorus for a flame retardant.
Examples of the carbon powder include carbon black, activated carbon, and graphite. The carbon black may be prepared by any of an oil furnace method, a gas furnace method, a channel method, a thermal method, and an acetylene method. . As silicone,
Silicone resin, silicone grease, silicone oil, silicone rubber can be used.

When the flame retardant aid (e) is blended, its proportion is 0.1 to 30 parts by weight, preferably 1 to 30 parts by weight, based on the total weight of (a) the synthetic resin and (b) the magnesium hydroxide particles. A range of 20 parts by weight is suitable. The resin composition of the present invention comprises the above-mentioned (a) synthetic resin and (b)
The magnesium hydroxide particles (c) and the component (d), if necessary, and the flame retardant auxiliary (e), if necessary, may be mixed according to a means known per se.

In order to improve the mechanical strength of the flame-retardant resin molded article of the present invention, a polymer alloy compatibilizer may be added. Specific examples of the polymer alloy compatibilizer include maleic anhydride-modified styrene-ethylene-butylene resin,
Maleic anhydride-modified styrene-ethylene-butadiene resin, maleic anhydride-modified polyethylene, maleic anhydride-modified EPR, maleic anhydride-modified polypropylene, carboxyl-modified polyethylene, epoxy-modified polystyrene / PMMA, polystyrene-polyimide-block copolymer, polystyrene-polymethacrylic acid Methyl block copolymer, polystyrene-polyethylene block copolymer, polystyrene-ethyl acrylate graft copolymer, polystyrene-polybutadiene graft copolymer, polypropylene-ethylene-propylene-diene graft copolymer, polypropylene-polyamide graft copolymer, polyethyl acrylate-polyamide graft copolymer, etc. No.

In the present invention, an antioxidant and / or a metal deactivator is added to the synthetic resin as the component (c).
The incorporation of the component (c) into the synthetic resin is indispensable for obtaining the heat-degradable molded article of the present invention. In other words, no matter how much the magnesium hydroxide particles used satisfy the three essential requirements (i) to (iii) of (b), the antioxidant and / or metal deactivator of component (c) Unless is added to the synthetic resin, the electric wires and cables of the present invention having excellent heat resistance and deterioration resistance cannot be obtained. The compounding amount of the antioxidant and / or the metal deactivator of the component (c) to the synthetic resin is 0.01 to 100 parts by weight of the synthetic resin.
10 to 10 parts by weight, preferably 0.1 to 5 parts by weight. 0.0
If the amount is less than 1 part by weight, it may not be possible to impart sufficient heat deterioration resistance to the molded article. If it is more than 10 parts by weight, the mechanical strength of the molded article may be reduced, and it is not economical.

As such antioxidants, phenolic antioxidants, organic phosphite antioxidants, thioether antioxidants, hindered amine antioxidants, and the like can be used.

Examples of phenolic antioxidants include pentaerythrityl-tetrakis [3- (3,5-di-t)
-Butyl-4-hydroxyphenyl) propionate, 2,2′-methylenebis [6- (1-methylcyclohexyl) -p-cresol], 2,2′-ethylidenebis (4,6-di-t-butylphenol) 2,2 '
-Butylidenebis (2-t-butyl-4-methylphenol), 1,1,3-tris (2-methyl-4-hydroxy-5-t-butylphenyl) butane, triethylene glycol-bis [3- (3 -T-butyl-5-methyl-
4-hydroxyphenyl) propionate], 1,6-
Hexanediol-bis [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate], 2,
2'-thiodiethylenebis [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate],
2,6-di-t-butyl-4-methylphenol, 2,6
-Di-t-butyl-4-ethylphenol, 2,6-dicyclohexyl-4-methylphenol, 2,6-diisopropyl-4-ethylphenol, 2,6-di-t-
Amyl-4-methylphenol, 2,6-di-t-octyl-4-n-propylphenol, 2,6-dicyclohexyl-4-n-octylphenol, 2-isopropyl-4-methyl-6-t-butylphenol, 2-t
-Butyl-2-ethyl-6-t-octylphenol,
2-isobutyl-4-ethyl-5-t-hexylphenol, 2-cyclohexyl-4-n-butyl-6-isopropylphenol, styrenated mixed cresol, d1
-Α-tocophenol, t-butylhydroquinone, 2,
2'-methylenebis (4-methyl-6-t-butylphenol), 4,4'-butylidenebis (3-methyl-6
-T-butylphenol), 4,4'-thiobis (3-
Methyl-6-t-butylphenol), 2,2′-thiobis (4-methyl-6-t-butylphenol),
4'-methylenebis (2,6-di-t-butylphenol), N, N'-hexamethylenebis (3,5-di-t-
Butyl-4-hydroxy-hydrocinnamide), 3,5
-Di-t-butyl-4-hydroxybenzylphosphonate-diethyl ester, 1,3,5-tris (2,6-dimethyl-3-hydroxy-4-t-butylbenzyl) isocyanurate, 1,3,5- Tris [(3,5-di-t
-Butyl-4-hydroxyphenyl) propionyloxyethyl] isocyanurate, tris (4-tert-butyl-2,6-dimethyl-3-hydroxybenzyl) isocyanurate, 2,4-bis (n-octylthio) -6
(4-hydroxy-3,5-di-t-butylanilino)
-1,3,5-triazine, tetrakis [methylene-3-
(3,5-di-t-butyl-4-hydroxyphenyl)
Propionate] methane, calcium bis (3,5-di-t-butyl-4-hydroxybenzylphosphonate) calcium, N, N'-bis [3- (3,5-di-t-butyl-
4-hydroxyphenyl) propionyl] hydrazine,
2,2′-oxamidobis [ethyl-3- (3,5-di-
t-butyl-4-hydroxyphenyl) propionate], bis [2-t-butyl-4-methyl-6- (3-
t-butyl-5-methyl-2-hydroxybenzyl) phenyl] terephthalate, 1,3,5-trimethyl-2,
4,6-tris (3,5-di-tert-butyl-4-hydroxybenzyl) benzene, 3,9-bis [1,1-dimethyl-2- [β- (3-tert-butyl-4-hydroxybenzyl) −5-
Methylphenyl) propionyloxy] ethyl] -2,
4,8,10-Tetraoxaspiro [5.5] undecane, 2,2-bis [4- [2- (3,5-di-tert-butyl-4-hydroxyhydrocinnamoyloxy)] ethoxyphenyl] Β- (3,5-di-t-butyl-4-hydroxyphenyl) propionic acid alkyl esters such as propane and stearyl-β- (4-hydroxy-3,5-di-t-butylphenol) propionate; .

Examples of the organic phosphite antioxidant include diphenylisodecyl phosphite, diphenyltridecyl phosphite, triphenyl phosphite, tris (nonylphenyl) phosphite, and tris (2,4-di-t-). Butylphenyl) phosphite, tris (butoxyethyl) phosphite, tetratridecyl-4,4'-butylidenebis (3-methyl-6-t-
(Butylphenol) -diphosphite, 4,4'-isopropylidenediphenol alkyl phosphite (where alkyl is about 12 to 15 carbon atoms), trioctyl phosphite, trilauryl phosphite, tristridecyl phosphite, tris isodecyl Phosphite, phenyl diisooctyl phosphite, phenyl diisodecyl phosphite, phenyl di (tridecyl) phosphite, diphenyl isooctyl phosphite,
4,4'-isopropylidenebis (2-t-butylphenol) di (nonylphenyl) phosphite, tris (biphenyl) phosphite, tetra (tridecyl)-
1,1,3-tris (2-methyl-5-t-butyl-4-
(Hydroxyphenyl) butane diphosphite, tris (3,5-di-t-butyl-4-hydroxyphenyl)
Phosphite, hydrogenated-4,4'-isopropylidene diphenol polyphosphite, bis (octylphenyl) bis [4,4'-butylidenebis (3-methyl-
6-t-butylphenol] • 1,6-hexanediol phosphite, hexatridecyl-1,1,3-tris (2-methyl-4-hydroxy-5-t-butylphenol) diphosphite, tris [4,4′- Isopropylidenebis (2-t-butylphenol)] phosphite, tris (1,3-distearoyloxyisopropyl) phosphite, 9,10-dihydro-9-phosphaphenanthrene-10-oxide, tetrakis (2, 4
-Di-t-butylphenyl) -4,4'-biphenylenediphosphonite, distearylpentaerythritol diphosphite, di (nonylphenyl) pentaerythritol diphosphite, phenyl-4,4'-isopropylidenediphenol. Pentaerythritol diphosphite, bis (2,4-di-t-butylphenyl) pentaerythritol diphosphite, bis (2,6-di-t
-Butyl-4-methylphenyl) pentaerythritol diphosphite and phenylbisphenol-A-pentaerythritol diphosphite.

As the organic thioether-based antioxidant,
For example, polyalkyl alcohol esters of dialkylthiodipropionate and alkylthiopropionic acid can be used. However, thioether antioxidants are
When used in combination with a hindered amine-based light stabilizer, the function and effect of the light stabilizer may be impaired. Therefore, it is better to avoid using the light stabilizer in combination with the light stabilizer if possible. As the dialkylthiodipropionate used herein, a dialkylthiodipropionate having an alkyl group having 6 to 24 carbon atoms is preferable, and as a polyhydric alcohol ester of alkylthiopropionic acid, an alkyl having 4 to 24 carbon atoms is preferable. Polyhydric alcohol esters of alkylthiopropionic acids having a group are preferred. In this case, examples of the polyhydric alcohol constituting the polyhydric alcohol ester include glycerin, trimethylolethane, trimethylolpropane, pentaerythritol, and trishydroxyethyl isocyanurate. As such a dialkylthiodipropionate, for example, dilaurylthiodipropionate,
Examples include dimyristyl thiodipropionate and distearyl thiodipropionate. On the other hand, as polyhydric alcohol esters of alkylthiopropionic acid, for example, glycerin tributyl thiopropionate glycerin trioctyl thiopropionate,
Glycerin trilauryl thiopropionate, glycerin tristearyl thiopropionate, trimethylol ethane tributyl thiopropionate, trimethylol ethane trioctyl thiopropionate, trimethylol ethane trilauryl thiopropionate, trimethylol ethane tristearyl Thiopropionate, pentaerythritol tetrabutyl thiopropionate, pentaerythritol tetraoctyl thiopropionate,
Examples thereof include pentaerythritol tetralauryl thiopropionate and pentaerythritol tetrastearyl thiopropionate.

Hindered amine antioxidants include:
For example, 2,2,6,6-tetramethyl-4-piperidylbenzoate, bis- (1,2,6,6-pentamethyl-
4-piperidyl) -2- (3,5-di-t-butyl-4
-Hydroxybenzyl) -2-n-butylmalonate,
Bis (2,2,6,6-tetramethyl-4-piperidyl)
Sebacate, dimethyl-1- (2-hydroxyethyl) -4-hydroxy-2,2,6,6-tetramethylpiperidine succinate polycondensate, poly [6- (1,1,3,3-tetramethylbutyl) ) Imino-1,3,5-triazine-
2,4-diyl] [(2,2,6,6-tetramethyl-4-
Piperidyl) imino] hexamethylene [2,2,6,6-
Tetramethyl-4-piperidyl) imino], tetrakis (2,2,6,6-tetramethyl-4-piperidyl) -1,
2,3,4-butanetetracarboxylate, bis- (N
-Methyl-2,2,6,6-tetramethyl-4-piperidyl) sebacate, 1,1 '-(1,2-ethanediyl) bis (3,3,5,5-tetramethylpiperazinone), ( Mixed 2,2,6,6 ・ tetramethyl-4-piperidyl / tridecyl) -1,2,3,4-butanetetracarboxylate, (Mix 1,2,2,6,6-pentamethyl-4-) Piperidyl / tridecyl) -1,2,3,4-butanetetracarboxylate, mixed [2,2,6,6
-Tetramethyl-4-piperidyl / β, β, β ', β'-
Tetramethyl-3,9- [2,4,8,10-tetraoxasbylo (5,5) undecane] diethyl] -1,2,3,4
-Butanetetracarboxylate, mixed [1,2,
2,6,6-pentamethyl-4-piperidyl / β, β,
β ', β'-tetramethyl-3,9- [2,4,8,10-
Tetraoxaspiro (5,5) undecane] diethyl]
-1,2,3,4-butanetetracarboxylate, N,
N'-bis (3-aminopropyl) ethylenediamine-
2,4-bis [N-butyl-N- (1,2,2,6,6-pentamethyl-4-piperidyl) amino] -6-chloro-
1,3,5-triazine condensate, poly [6-N-morpholyl-1,3,5-triazine-2,4-diyl] [(2,
2,6,6-tetramethyl-4-piperidyl) imino] hexamethylene [(2,2,6,6-tetramethyl-4-piperidyl) imide], N, N′-bis (2,2,6, Condensate of 6-tetramethyl-4-piperidyl) hexamethylenediamine with 1,2-dibromoethane, [N- (2,2,
6,6-tetramethyl-4-piperidyl) -2-methyl-2- (2,2,6,6-tetramethyl-4-piperidyl) imino] propionamide.

As the metal deactivator, for example, 1, 2,
3-benzotriazole, tolyltriazole, tolyltriazoleamine salt, tolyltriazole potassium salt, 3- (N-salicyloyl) amino-1,2,4-triazole, triazine-based derivative, tolyltriazole derivative, decamethylenedicarboxylic acid disalicylo Ilhydrazide, acid amine derivative, MarkZS-81 (ADEKA
Argus Chemical Co., Ltd.).

In the present invention, in applications where weather resistance is required,
Further, an ultraviolet absorber and / or a light stabilizer as a component (d) is used in an amount of 0.01 to 10 parts by weight based on 100 parts by weight of the synthetic resin.
It is possible to provide an electric wire and a cable which are excellent in weather resistance in which 0.1 to 5 parts by weight, preferably 0.1 to 5 parts by weight, are blended.
If the amount of component (d) is less than 0.01 part by weight, sufficient weather resistance may not be imparted. If the amount is more than 10 parts by weight, the mechanical strength of the molded article may be reduced, and the cost may be reduced. not. As the ultraviolet absorber, salicylic acid esters, cyanoacrylates, benzophenones, and benzotriazoles can be used. Such ultraviolet absorbers and light stabilizers include salicylic acid esters such as phenyl salicylate, pt-butyl salicylate, and p-octylphenyl salicylate;
2,4-cyanoacrylates such as -ethylhexyl-2-cyano-3,3'-diphenylacrylate and ethyl-2-cyano-3,3'-diphenylacrylate
-Dihydroxybenzophenone, 2-hydroxy-4-
Methoxybenzophenone, 2,2'-dihydroxy-4
-Methoxybenzophenone, 2,2'dihydroxy-4,
4'-dimethoxybenzophenone, 2-hydroxy-4
-Methoxy-2'-carboxybenzophenone, 2-hydroxy-4-methoxy-5-sulfonebenzophenone trihydrate, 2-hydroxy-4-n-octoxybenzophenone, 2,2 ', 4,4'-tetrahydroxybenzophenone , Bis (5-benzoyl-4-hydroxy-2-methoxyphenyl) methane, 2-hydroxy-
Benzophenones such as 4-benzyloxybenzophenone; 2- (2′-hydroxy-3 ′, 5′-di-t-
Butylphenyl) benzotriazole, 2- (2'-hydroxy-3'-t-butyl-5'-methylphenyl)
-5-chlorobenzotriazole, 2- (2'-hydroxy-3 ', 5'-di-t-butylphenyl) -5-chlorobenzotriazole, 2- (2'-hydroxy-
5′-t-octylphenyl) benzotriazole, 2
-(2'-hydroxy-3'5'-di-t-amylphenyl) benzotriazole, 2- [2'-hydroxy-
3 '-(3 ", 4", 5 ", 6" -tetrahydrophthalimidomethyl) -5'-methylphenyl] benzotriazole, 2,2'-methylenebis [4- (1,1,3,3-tetramethyl Butyl) -6- (2H-benzotriazol-2-yl) phenol] and the like; bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate, bis (1,2,2, 6,6-pentamethyl-4-piperidyl) sebacate, 1- [2- {3-
(3,5-di-t-butyl-4-hydroxyphenyl)
Propionyloxy {ethyl} -4- {3- (3,5-
Di-tert-butyl-4-hydroxyphenyl) propionyloxy {-2,2,6,6-tetramethylpiperidine;
8-benzyl-7,7,9,9-tetramethyl-3-oxytyl-1,2,3-triazaspiro [4,5] undecane-2,4-dione, 4-benzoyloxy-2,2,6,
6, -tetramethylpiperidine, dimethyl succinate-1
-(2-hydroxyethyl) -4-hydroxy-2,2,
6,6-tetramethylpiperidine polycondensate, poly [[6
-(1,1,3,3-tetramethylbutyl) imino-1,
3,5-Triazine-2,4-diyl] [(2,2,6,6
-Tetramethyl-4-piperidyl) imino] hexamethylene [(2,2,6,6-tetramethyl-4-piperidyl) imino]], 2- (3,5-di-t-butyl-4-)
Bis (1,2,2,6,6-pentamethyl-4-piperidyl) -2-hydroxybenzyl) -2-n-butylmalonate
1,2,3,4-butanetetracarboxylic acid and 1,2,2,6,
Condensation product of 6-pentamethyl-4-piperidinol with tridecyl alcohol, condensation of 1,2,3,4-butanetetracarboxylic acid with 2,2,6,6-tetramethyl-4-piperidinol and tridecyl alcohol Things, 1,2,3,4
-Butanetetracarboxylic acid, 1,2,2,6,6-pentamethyl-4-piperidinol and β, β, β ′, β′-tetramethyl-3,9- (2,4,8,10-tetraoxa Condensation product with spiro [5,5] undecane) diethanol,
2,3,4-butanetetracarboxylic acid, 2,2,6,6-tetramethyl-4-piperidinol and β, β, β ′, β′-
Condensation product with tetramethyl-3,9- (2,4,8,10-tetraoxaspiro [5,5] undecane) diethanol, 1,2,2,6,6-tetramethyl-4-piperidyl-
Hindered amines such as methacrylate, 2,2,6,6-tetramethyl-4-piperidyl-methacrylate;
Anilide acetate derivative, 2-ethoxy-5-t-butyl-
2'-ethyl oxalic acid bisanilide, 2-
Ethoxy-2-ethyl oxalic acid bisanilide, 2,4-di-t-butyl-3,5-di-t-butyl-
4-hydroxybenzoate, 2-ethylhexyl-2
-Cyano-3,3-diphenylacrylate, 1,3-bis- (4-benzoyl-3-hydroxyphenoxy)-
2-propyl acrylate, 1,3-bis- (4-benzoyl-3-hydroxyphenoxy) -2-propyl methacrylate, 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid, methyl o-benzoylbenzoate, barium, A phosphorus-containing organic-inorganic composite, a semicarbazone-based light stabilizer, a zinc oxide-based ultraviolet stabilizer, and the like can be mentioned.
More than one species can be used.

The resin composition of the present invention having heat deterioration resistance and flame retardancy may contain other conventional additives in addition to the above components within a range not to impair the object of the present invention. Examples of such additives include process oils, antistatic agents, pigments, foaming agents, plasticizers, fillers, reinforcing agents, organic halogen flame retardants, cross-linking agents, waxes, antibacterial agents, antioxidants, and ozone deterioration. Antiseptics, slip agents, antifouling agents, preservatives,
Examples thereof include a warming agent, an anti-scorch agent, a lubricant, a nucleating agent, a deodorant, a rat-proofing agent, a heat stabilizer, and a curing agent.

As the anti-aging agent, for example, phenyl-α
Naphthylamines such as naphthylamine and phenyl-β-naphthylamine; and p- (p-toluenesulfonylamide) -diphenylamine, 4,4 ′-(α, α′-dimethylbenzyl) diphenylamine and 4,4′-dioctyldiphenylamine Diphenylamine type; N,
N′-diphenyl-p-phenylenediamine, N-isopropyl-N′-phenyl-p-phenylenediamine,
P-phenylenediamines such as N, N'-di-2-naphthyl-p-phenylenediamine; other amines such as condensates of aromatic amines and aliphatic ketones, butyraldehyde-aniline condensates; phenyl- a mixture of α-naphthylamine and diphenyl-p-phenylenediamine,
Amine mixture such as a mixture of phenyl-β-naphthylamine and diphenyl-p-phenylenediamine, a mixture of phenyl-β-naphthylamine, p-isopropoxydiphenylamine and diphenyl-p-phenylenediamine; 2,2,4-trimethyl Polymer of -1,2-dihydroquinoline, 6-ethoxy-2,2,4-trimethyl-1,
Quinolines such as 2-dihydroquinoline; 2,5-di-
Hydroquinone derivatives such as (t-amyl) hydroquinone, 2,5-di-t-butylhydroquinone and hydroquinone monomethyl ether; 1-oxy-3-methyl-4-isopropylbenzene, 2,6-di-t-butylphenol and the like Monophenol type: 2,2′-methylene-bis- (4-methyl-6-t-butylphenol), 2,
2'-methylene-bis- (4-methyl-6-cyclohexylphenol), 4,4'-methylene-bis- (4.6
-Di-t-butylphenol), 2,2'-methylene-
Bis- (6-α-methyl-benzyl-p-cresol), methylene-bridged polyhydric alkylphenol, 1,
3,5-trimethyl-2,4,6-tris (3,5-di-t
Bis, tris, polyphenols such as -butyl-4-hydroxybenzyl) benzene; 4,4'-thiobis-
(6-t-butyl-3-methylphenol), 4,4 '
Thiobisphenols such as -thiobis- (6-tert-butyl-o-cresol); 1,1,3-tris- (2-methyl-4-hydroxy-5-tert-butylphenyl) butane, 4,4 '-Butylidenebis- (3-methyl-6-t
Hindered phenols such as -butylphenol);
Phosphites such as tris (nonylphenyl) phosphite, tris (mixed mono- and di-nonylphenyl) phosphite, phenyldiisdecyl phosphite; dilauryl thiodipropionate, distearyl thiodipropionate; Dimistyl-3,3'-thiodipropionate, ditridecyl-3,3'-thiodipropionate, pentaerythritol-tetrakis- (β
-Lauryl-thiopropionate), dilauryl thiodipropionate, β-alkylthioester propionate, sulfur-containing ester compound, 1,1′-thiobis (2
-Naphthol), 2-mercaptobenzimidazole,
Mixture of 2-mercaptobenzimidazole and phenol condensate, zinc salt of 2-mercaptobenzimidazole, zinc salt of 2-mercaptomethylbenzimidazole, zinc salt of 4-mercaptomethylbenzimidazole, dioctadecyl disulfide, morpholine-N- Reaction product of oxydiethylene dithiocarbamate and dibenzothiazyl disulfide, 1,3-bis (dimethylaminopropyl) -2-thiourea, tributylthiourea, bis [2-methyl-4- {3-n-alkyl (C ₁₂ Or C
₁₄ ) Thiopropionyloxy {-5-t-butylphenyl] sulfide, Antigen AS (manufactured by Sumitomo Chemical), mixed lauryl stearylthiodipropionate, cyclic acetal, Sumilizer AZ (manufactured by Sumitomo Chemical), Sumilizer MPS (manufactured by Sumitomo Chemical) ), Silica gel, Ozonok 73
3 (Ouchi Shinko Chemical), Antage BOUR (Kawaguchi Chemical), Antage BOP (Kawaguchi Chemical), AD-51
(Made by Sakai Chemical), AD-400 (made by Sakai Chemical), Ozonone E
X (manufactured by Seiko Chemical Co., Ltd.) and Ozonone EX-3 (manufactured by Seiko Chemical Co., Ltd.), and one or more of these compounds can be used.

Examples of the ozone deterioration inhibitor include substituted p
-Phenylenediamine, substituted dihydroquinoline, diallylosazone, substituted thiourea, microcrystalline wax and the like, and one or more of these compounds can be used. The structure and manufacturing method of the heat-deteriorating water-resistant insulating flame-retardant electric wire, cable, and molded product of the present invention are not particularly limited. Any structure and manufacturing method can be adopted as long as the object of the present invention is achieved.

For example, electric wires and cables are prepared by using the above-described flame-retardant resin composition having excellent properties such as heat resistance and mechanical strength as conductors (copper, copper alloy) as an insulating part and / or a sheath part and / or an outer part. , Aluminum, aluminum alloys, optical fibers, etc.) to obtain the heat-deteriorating water-resistant insulating flame-retardant wires and cables of the present invention. At the time of coating, crosslinking such as chemical crosslinking, radiation crosslinking, and silane crosslinking may or may not be performed. The structure may be any single-core, multi-core, round or flat structure.

The resin composition coated on the electric wire and cable of the present invention has, when tested on a molded article thereof, at least certain characteristics based on the following test method. And the cable has excellent thermal stability, water resistance and weather resistance. (1) The resin composition is a molded product (thickness of 2.1 m)
m) is in a JIS K 7212 gear oven,
For example, in a thermal stability test at 150 ° C., the number of days that does not thermally decompose and resist white powder is 10 days or more, preferably 20 days or more. (2) As for the resin composition, a molded article from the resin composition is JIS K
7212 in a gear oven, eg at 150 ° C. 10
In the thermal stability test for one day, the tensile strength maintains 60% or more, preferably 80% or more of the tensile strength before the thermal stability test. (3) As for the resin composition, a molded article from the resin composition is JIS K
In a heat stability test at 150 ° C. for 10 days in a gear oven of No. 7212, the elongation is maintained at 60% or more, preferably 80% or more of the elongation before the heat stability test. (4) As for the resin composition, a molded article from the resin composition is JIS K
7212 in a gear oven, eg at 150 ° C. 10
In the thermal stability test for one day, the Izod impact strength is 60% or more, preferably 80% or more of the Izod impact strength before the thermal stability test. (5) The resin composition is molded at 95 ° C 48
After immersion in ion-exchanged water for 70 hours or 70 ° C. for 168 hours, the molded article has a volume resistivity of 1 × 10 ¹⁰ Ω · cm or more, preferably 1 × 10 ¹³ Ω · cm or more. (6) As for the resin composition, a molded article from the resin composition is JIS A
All of the tensile strength, elongation and Izod impact strength of a molded article exposed outdoors for one year according to the outdoor exposure test method of No. 1410 are 60% or more, preferably 80, before exposure to the outdoors.
% Has been maintained.

[0046]

The present invention will be described below in more detail with reference to examples. However, all% means weight%. The measurement of the particle properties of the magnesium hydroxide particles and the measurement of the physical properties of the resin composition molded article were performed by the following methods.

(1) Average secondary particle diameter of magnesium hydroxide MICROTRAC particle size analyzer SPA type [LEED
S & NORTHRUPINSTRUMENT
TS Co., Ltd.]. Sample powder 700m
g was added to 70 ml of water, and subjected to a dispersion treatment for 3 minutes by ultrasonic waves (manufactured by NISSEI, MODELUS-300, current: 300 μA), and 2-4 ml of the dispersion was taken.
After adding 250 ml of degassed water to the sample chamber of the above particle size analyzer, activating the analyzer and circulating the suspension for 8 minutes, the particle size distribution is measured. Take a total of two measurements,
The arithmetic average value of the 50% cumulative secondary particle diameter obtained for each measurement is calculated and defined as the average secondary particle diameter of the sample.

(2) BET specific surface area of magnesium hydroxide particles Measured by a liquid nitrogen adsorption method. (3) Total content of Fe and Mn and total content of heavy metals of Fe, Mn, Cu, V, Co, Ni and Cr in magnesium hydroxide particles ICP-MS method (Inductively Coupled)
ed Plasma-Mass Spectrometer
ry) or the atomic absorption method. (4) Measurement of Total Content of Alkali Metals (Na, K, Li) of Water-Soluble Alkali Metal Compound of Magnesium Hydroxide Particles A 10 g sample of magnesium hydroxide particles was stirred in 100 ml of ion-exchanged water at 30 ° C. for 96 hours. The eluted alkali metal (total amount of Na, K, and Li) was measured by an atomic absorption method. (5) Tensile strength and elongation of molded article Measured according to JIS K7113. (6) Flame retardancy of molded article Measured according to the UL 94 VE method. The oxygen index is
It measured according to JISK7201.

(7) Izod impact strength of molded article Performed in accordance with JIS K 7110 (8) Heat deterioration resistance of molded article 150 using a gear oven of JIS K 7212
The following thermal stability test was conducted at ℃, and the heat resistance deterioration of the molded article was examined by the test. Test piece is 2.1mm or 3.
The one having a thickness of 2 mm was used. 1. The number of days until the molded article is thermally decomposed and powdered (mainly white powder) 2. Izod impact strength, tensile strength and elongation after 10 days at 150 ° C thermal stability test (9) Water-resistant insulation of molded article Test Polypropylene was cut on four sides with scissors and each side was 10
A test piece composed of a rectangular parallelepiped having a square shape of 2 cm and a thickness of 2 mm was immersed in ion-exchanged water at 95 ° C. for 48 hours, taken out, and immersed in ion-exchanged water at 30 ° C. for 15 minutes. Thereafter, the test piece was taken out of the water, the surface moisture was wiped off with a paper towel, and the condition of 23 ° C. ± 2 ° C. and 50% RH was adjusted for 15 minutes. Under the same condition of the test piece, volume resistivity was measured using TR8401 manufactured by Takeda Riken Kogyo Co., Ltd. to obtain data on water-resistant insulation. However, the test piece of EVA was immersed in ion exchange water at 70 ° C. for 168 hours. Others were measured under the same conditions as for polypropylene.

(10) The compound names of the antioxidant, metal deactivator, ultraviolet absorber and light stabilizer used in the examples are as follows. (I) Irganox 1010; pentaerythrityl-tetrakis [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate] (ii) Irganox 1076; octadecyl-3-
(3,5-di-t-butyl-4-hydroxyphenyl)
Propionate (iii) Irganox 1098; N, N'-hexamethylenebis (3,5-di-t-butyl-4-hydroxy-hydrocinamide) (iv) DLTP; di-lauryl-thio-di-propionate ( v) Irganox MD 1024; N, N'-bis [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionyl] hydrazine (vi) Tinuvin 320; 2- (3,5-di- (t-butyl-2-hydroxyphenyl) benzotriazole (vii) tinuvin 622 LD; dimethyl succinate 1- (2-hydroxyethyl) -4-hydroxy-
2,2,6,6-tetramethylpiperidine polycondensate Examples 1 and 2 and Comparative Examples 1 to 3 (Evaluation of thermal stability and physical properties of resin composition) Various magnesium hydroxide particles shown in Table 1 were used. Then, a test piece was prepared with the following composition.

150 parts by weight Magnesium hydroxide particles 100 parts by weight Polypropylene (MFI 2.6
0.25 parts by weight Antioxidant (Irganox 1010 manufactured by Ciba Special Chemicals) 0.25 parts by weight Antioxidant (DL manufactured by Yoshitomi Pharmaceutical Co., Ltd.)
TP) (i) Test piece preparation method After drying and pulverizing magnesium hydroxide particles of each sample surface-treated so that stearic acid is adsorbed to magnesium hydroxide particles by 2.6% by weight, resin (polypropylene) and 230 ° C in twin screw extruder with antioxidant
To obtain a mixture, and the mixture is again mixed at 120 ° C. for 2 hours.
rs drying was performed, and it shape | molded at 230 degreeC with the injection molding machine.
Twin screw extruder: BT-30- manufactured by Plastic Optical Laboratory
S2-30-L injection molding machine: F manufactured by Nissei Plastic Industry Co., Ltd.
Each test piece obtained by S 120S 18A SE injection molding is as follows. Test piece AI: magnesium hydroxide particle compound of sample AI Test piece A-II: magnesium hydroxide particle compound of sample A-II Test piece BI: sample BI Test piece B-II: Magnesium hydroxide particle composition of sample B-II Test piece B-III: Magnesium hydroxide particle composition of sample B-III Thermal stability of molded article The properties and physical properties are shown in Table 2.

[0052]

[Table 1]

[0053]

[Table 2]

Before dipping the test pieces of Examples 1 and 2 and Comparative Examples 1 to 3 in water (23 ° C. ± 2 ° C., 50 ° C.
The volume resistivity of each sample (at 96% for 5 hours at 5% RH) was 1 × 10 ¹⁶ Ω · cm or more.

Properties of magnesium hydroxide particles used in Examples 1 and 2 and Comparative Examples 1 to 3, and Examples 1 and 2
From the evaluation results of the resin molded products containing the magnesium hydroxide of Comparative Examples 1 to 3, the following could be proved. (A) As compared with Comparative Examples 2 and 3, the resin molded article filled with magnesium hydroxide particles having a high content of heavy metal compounds such as Fe and Mn has low heat deterioration resistance. (B) Compared with Comparative Example 1, the water-resistant insulating property of the resin molded product filled with magnesium hydroxide particles having a large content of the water-soluble alkali metal salt is lower. (C) From Examples 1 and 2, in order to obtain a resin molded product excellent in both properties of heat deterioration resistance and water insulation resistance, the content of heavy metal compounds such as Fe and Mn in magnesium hydroxide particles must be reduced. Both conditions are low and the content of the water-soluble alkali metal salt is low.

Comparative Example 4 A test piece was prepared in the same manner as in Example 1 except that magnesium hydroxide was not used in Example 1, and a test for heat deterioration resistance (pulverization) at 150 ° C. was performed. . As a result of the test, the test piece
After 0 days, it turned yellow. Flame retardancy (VL94VE 1/8 inch) was out of specification.

Comparative Example 5 A test piece was prepared in the same manner as in Example 1 except that no antioxidant was added in Example 1, and a test for heat deterioration resistance (whitening) at 150 ° C. Done. As a result of the test, the test piece became white powder three days after the start of heating.

Example 3, Comparative Examples 6 and 7 The blending amount of magnesium hydroxide particles in Example 1 (1
50 parts by weight) was changed to 220 parts by weight, and 0.1 parts by weight of Irganox MD 1024 manufactured by Ciba Special Chemicals was added as a metal deactivator. Then A
-III, Comparative Example 6 was changed to B-IV, and Comparative Example 7 was changed to BV, and the same test as in Example 1 was performed. Table 3 shows the test results. However, the particles of A-III, B-IV, and BV are sodium stearate treated products in which 4.5% by weight of stearic acid is adsorbed. The total heavy metal content in Table 3 is Fe + Mn + Cu + V + Co + Ni +
Cr.

In Example 3, since the magnesium hydroxide particles satisfying all of the requirements (i) to (iv) described in the present application were used, the molded product had flame retardancy, heat deterioration resistance, mechanical strength, The water-resistant insulation was of a high level and had no problem. On the other hand, in Comparative Example 6, the average secondary particle diameter, the content of heavy metals such as Fe and Mn, and the total content of the water-soluble alkali metal salts satisfy the requirements described in the present application.
Magnesium hydroxide particles whose T method specific surface area did not satisfy the requirements described in the present application were used. As a result, the physical properties of the resin molded product of Comparative Example 6 were much lower or significantly lower in mechanical strength, heat deterioration resistance, and water resistance as compared with Example 3.

In Comparative Example 7, the BET specific surface area, Fe,
The content of heavy metals such as Mn and the total content of water-soluble alkali metal salts satisfy the requirements described in the present application, but magnesium hydroxide particles whose average secondary particle size does not satisfy the requirements described in the present application were used. As a result, as for the physical properties of the resin molded product of Comparative Example 7, the mechanical strength (before and after the heat deterioration resistance test) was much inferior to that of Example 3, and the water-resistant insulation was considerably inferior.

[0061]

[Table 3]

Examples 4 and 5 The same test as in Example 1 was carried out except that the magnesium hydroxide particles in Example 1 were changed to the following A-IV particles in Example 4, and the following particles were changed to AV particles in Example 5. did. A-IV particles are stearyl phosphate diethanolamine salt

[0063]

Embedded image

With 50% of diester of

[0065]

Embedded image

Using a mixture of 50% monoester of
What was surface-treated at 3 wt% with respect to AI particles before treatment
It is. AV particles are mixed with water and triethanolamine.
In a solvent, the AI particles before the surface treatment are 3w relative to the particles.
t% isopropyl triisostearoyl titanate
More surface treated. Surface treatment as above
The particle properties of the obtained A-IV particles and AV particles are AI
The degree of change in the adsorbed substance in the particles is AI
The particle properties were almost the same. A-IV particle-filled tree
Example 4 of fat-formed product, physical properties of resin molded product filled with AV particles
Indicates that the volume resistivity as water-resistant insulation in Example 4 was
4 × 10 of Example 1 ^FifteenΩ · cm to 6 × 10^FifteenΩ · cm
Other than the improvement, it was almost the same as the physical properties of Example 1.

Example 6, Comparative Example 8 The following resin composition was prepared. 100 parts by weight ethylene vinyl acetate copolymer (vinyl acetate content 30 wt%) 150 {magnesium hydroxide particles AI or B-III 1} silane coupling agent (NUC A-172, manufactured by Nippon Yunika) 1} DCP・ Culmill peroxide) 1 防止 Antioxidant (Irganox 1 076 manufactured by Ciba Special Chemicals Co., Ltd.) This composition was kneaded at 120 ° C. by a single kneading extruder, and pre-formed at 120 ° C. for 5 minutes by a compression molding machine. Then, at 220 ° C
Crosslinking was performed for 0 minutes to obtain 2.1 mm and 3 mm plates. A test piece was prepared from this plate and the physical properties were measured. Table 4 shows the results
Shown in

[0068]

[Table 4]

Example 7 The following resin compositions (1) to (3) were prepared, test pieces were prepared in the same manner as in Example 1, and the flame retardancy of each test piece was evaluated. However, in the case of nylon 6, kneading and injection molding were performed at 250 ° C. As a result, each of the test pieces had a flame retardancy of UL94-VE 1/16 inch which was V-0.
Met. (1) 65% by weight of magnesium hydroxide particles (A-I) 35% by weight Nylon 6 (injection molding grade having a specific gravity of 1.14) 0.2% by weight Antioxidant (Irganox 1098 manufactured by Ciba Special Chemicals) (2) 68% by weight of magnesium hydroxide particles (AI) 32% by weight High-density polyethylene (MFI 5.0 g / 10 min. Injection molding grade) 0.1% by weight Antioxidant (Irganox 1010 manufactured by Ciba Special Chemicals Co., Ltd.) 0.1% by weight Antioxidant (DLTP manufactured by Yoshitomi Pharmaceutical Co., Ltd.) (3) 20% by weight Magnesium hydroxide particles (AI) 7% by weight Red phosphorus (manufactured by Rin Kagaku Kogyo; 1-Baexel 140) 5% by weight carbon Black (oil furnace method FEF) 63% by weight ABS resin (MFI 25g / 10min impact resistant grade) 5% by weight Nylon 6 ( Injection molding grade) 0.2 wt% antioxidant heavy 1.14 (Ciba Geigy Irganox 1010)

Example 8 The following composition was prepared, masticated with an oven roll at 70 ° C., and one day later, vulcanized at 210 ° C. for 10 minutes to obtain a １ ／ inch thick plate. . A test piece having a thickness of 1/8 inch for a UL94-VE test was prepared from the obtained plate. About this test piece, UL94V
E was tested. As a result of the test, the flame retardancy was V-1. Composition 100 parts by weight EPDM rubber (ethylene / propylene ratio = 50/50 mol) 170 parts by weight Magnesium hydroxide particles (A-I) 3 parts by weight Di-cumyl peroxide 0.5 part by weight Poly (2,2,4) -Trimethyl-1,2
-Dihydroquinoline) 1 part by weight Silane coupling agent (manufactured by Nippon Yunika)
A-172) 1 part by weight Stearic acid 1 part by weight Sulfur

Example 9 The following composition was prepared, kneaded at about 30 ° C. with a kneader, and the kneaded mixture was cured at 200 ° C. for 5 minutes to obtain a 1/8 thickness.
I got an inch board. A test piece having a thickness of 1/8 inch for a UL94-VE test was prepared from the obtained plate. The test piece was tested for UL94VE. As a result of the test, the flame retardancy was V-0. A-VI particles have an average secondary particle diameter of 8 μm and a BET specific surface area of 2 m ² /
g, the total content of heavy metals is 0.001% by weight, the total content of water-soluble alkali metal salts in terms of alkali metal is 0.003% by weight,
It was surface-treated with 1% by weight of gamma glycyloxypropyltrimethoxysilane. Composition 100 parts by weight Epoxy resin (specific gravity 1.17) 100 parts by weight Magnesium hydroxide particles (A-VI) 5 parts by weight Red phosphorus (Nova Excel 14 manufactured by Rin Kagaku)
0) 1 part by weight carbon black (oil furnace method
FEF) 10 parts by weight Hardener (HY951 manufactured by Ciba Special Chemicals) 1 part by weight Stearic acid 0.2 part by weight Antioxidant (Irganox 1010 manufactured by Ciba Special Chemicals)

Example 10 The resin composition of Example 6 was coated to a thickness of 3 mm on each of the core materials made of copper wire or optical fiber.
Two types of 3005 test pieces of electric wire for flame retardancy test were prepared. JIS C 3
005 was subjected to a flame retardancy test. All of the test results were self-extinguishing (extinguished within 10 seconds).

Example 11 A plate having a length of 11 cm, a width of 19.5 cm and a thickness of 2 mm was molded from the resin composition of Example 3 at 230 ° C. using an injection molding machine. Flames under the same conditions as in the UL 94 vertical test were contacted twice with the molded product from all angles for 10 seconds each, but all of the molded products extinguished within 5 seconds.

Example 12 In the resin composition of Example 1, the amount of the antioxidant Irganox 1010 was increased from 0.25 part by weight to 0.5 part by weight without adding DLTP. 0.25 parts by weight of the UV absorber Tinuvin 320 manufactured by the company
The resin composition to which 0.25 part by weight of LD was added was kneaded at 230 ° C., and the obtained mixture was injection-molded at 230 ° C.
Tensile test piece of SK 7113 and JIS K 720
Thus, an Izod impact test specimen No. 1 was obtained. These test pieces were subjected to JIS A 1410 for one year from January 10, 1999.
Exposure was carried out by the method described above. JIS K 7113 and JIS K for this test piece exposed for one year
7201 was carried out, and the surface of the molded article was visually observed. Table 5 shows the results of the test.

Comparative Example 9 The same resin composition as in Example 12 was kneaded by the same method as in Example 12, except that no ultraviolet absorber and a light stabilizer were added to the composition of Example 12. Molded,
An outdoor exposure test was performed. Table 5 shows the results of the test. Note that Comparative Example 9 is a comparative example with respect to Example 12.

[0076]

[Table 5]

In Table 5, the numerical values and characters in parentheses are the test results after the outdoor exposure test, and those not in the parentheses are the test results before the outdoor exposure test. Example 1
In No. 2, the molded product exposed outdoors for one year maintained sufficiently practical tensile strength, elongation, Izod impact strength, and surface appearance of the molded product. On the other hand, Comparative Example 9 had practical tensile strength, elongation, Izod impact strength, and surface appearance before outdoor exposure. Had declined.
In the surface appearance of Comparative Example 9, cracks began to occur around four months after the outdoor exposure test was started, and one year later, the entire surface was whitened.

[0078]

According to the present invention, (a) 100 parts by weight of synthetic resin, (b) (i) average secondary particle diameter is 10 μm or less, and (ii) BET specific surface area is 20 m ² / (iii) the total content of the Fe compound and the Mn compound is 0.02% by weight or less in terms of metal, and (iv) the total content of the water-soluble alkali metal compound is alkali. 10 to 500 parts by weight of magnesium hydroxide particles characterized by being 0.05% by weight or less in terms of metal (c) 0.05% by weight of an antioxidant and / or a metal deactivator
It is possible to provide an electric wire and cable formed from a resin composition containing 1 to 10 parts by weight and having excellent heat resistance and water resistance and a molded article formed from the resin composition. According to the present invention, the composition may further comprise (d) an ultraviolet absorber and / or a light stabilizer, if necessary.
By mixing 1 to 10 parts by weight, it is possible to provide an electric wire, a cable, and a molded article having further excellent weather resistance.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C08L 101/00 H01B 3/00 A H01B 3/00 7/34 B 7/282 7/28 E 7/17 Z 7/29 7/34 A

Claims (26)

[Claims] (1) 100 parts by weight of a synthetic resin, (b) 10 to 500 parts by weight of magnesium hydroxide particles, and (c) 0.0 of an antioxidant and / or a metal deactivator.
A resin composition containing 1 to 10 parts by weight, wherein the magnesium hydroxide particles have the following requirements (i) to (iv): (i) an average secondary particle diameter measured by a laser diffraction scattering method of 10 μm or less. (Ii) The BET specific surface area is 20 m ² / g or less (iii) The total content of the Fe compound and the Mn compound is 0.02% by weight or less in terms of metal (iv) The content of the water-soluble alkali metal compound A heat-resistant, water-resistant, flame-retardant, insulated wire and cable coated with a resin composition having a total of 0.05% by weight or less in terms of alkali metal. 2. The resin composition according to claim 1, wherein the resin composition is a composition comprising 30 to 400 parts by weight of the magnesium hydroxide particles with respect to 100 parts by weight of the synthetic resin. Insulated wires and cables. 3. The magnesium hydroxide particles comprise an iron compound, a manganese compound, a cobalt compound, a chromium compound,
The heat-resistant, water-resistant, flame-retardant, insulated wire and cable according to claim 1, wherein the total content of the copper compound, the vanadium compound, and the nickel compound is 0.02% by weight or less in terms of metal. 4. The magnesium hydroxide particles according to claim 1, wherein the total content of iron compound and manganese compound is 0.01% by weight or less in terms of metal. Insulated wires and cables. 5. The insulated wire and cable according to claim 1, wherein the magnesium hydroxide particles have an average secondary particle diameter of 5 μm or less as measured by a laser diffraction scattering method. 6. The magnesium hydroxide particles have an average secondary particle diameter of 0.5 to 2 μm measured by a laser diffraction scattering method.
The insulated wires and cables according to claim 1, which are heat-resistant, water-resistant, flame-resistant and flame-retardant. 7. The insulated wire and cable according to claim 1, wherein the magnesium hydroxide particles have a specific surface area of 1 to 11 m ² / g by a BET method. 8. The insulated wire and cable according to claim 1, wherein the magnesium hydroxide particles have a specific surface area of 3 to 8 m ² / g by a BET method. 9. The heat-resistant, water-resistant insulating material according to claim 1, wherein the magnesium hydroxide particles have a total content of water-soluble alkali metal compounds of not more than 0.03% by weight in terms of alkali metal. Flame retardant insulated wires and cables. 10. The heat-resistant, water-resistant, insulating and flame-retardant flame retardant according to claim 1, wherein the total content of the water-soluble alkali metal compound in the magnesium hydroxide particles is 0.003% by weight or less in terms of alkali metal. Insulated wires and cables. 11. The magnesium hydroxide particles may contain higher fatty acids, anionic surfactants, phosphate esters, silane coupling agents, titanate coupling agents, aluminate coupling agents, and fatty acid esters of polyhydric alcohols. 2. The insulated wire and cable according to claim 1, which has been surface-treated with at least one type of surface treatment agent selected from the group consisting of: 12. The insulated wire and cable according to claim 1, wherein the synthetic resin is a polyolefin resin. 13. The heat-resistant, water-resistant, flame-retardant insulated wire and cable according to claim 1, wherein the resin composition contains 0.1 to 5 parts by weight of an antioxidant with respect to 100 parts by weight of the synthetic resin. . 14. The antioxidant is at least one selected from the group consisting of phenolic antioxidants, organic phosphite antioxidants, organic thioether antioxidants, and hindered amine antioxidants. The heat-deteriorating water-resistant insulating flame-retardant insulated wires and cables according to 1. 15. A molded article (thickness: 2.1 mm) obtained from the resin composition does not thermally decompose in a heat stability test at 150 ° C. in a gear oven according to JIS K 7212 and resists whitening. The heat-deteriorating water-resistant insulating flame-retardant insulated wire and cable according to claim 1, wherein the number of days is 10 days or more. 16. The resin composition was subjected to a heat stability test at 150 ° C. in a gear oven of JIS K 7212 in a molded article (thickness: 2.1 mm).
2. The heat-resistant, water-resistant, insulation-resistant, flame-retardant insulated wire and cable according to claim 1, wherein the number of days for resisting whitening without thermal decomposition is 20 days or more. 17. The resin composition is molded in a gear oven according to JIS K 7212 by a molding method.
The heat-resistant, water-resistant, flame-retardant, insulated wire and cable according to claim 1, wherein the tensile strength in the thermal stability test at 0 ° C for 10 days maintains 60% or more of the tensile strength before the thermal stability test. 18. The resin composition may be molded into a molded article of 150 g in a gear oven according to JIS K 7212.
The elongation percentage in the thermal stability test at 10 ° C. for 10 days maintains 60% or more of the elongation percentage before the thermal stability test.
Heat resistant deterioration resistant water resistant insulation flame retardant insulated wires and cables. 19. The resin composition is molded from a molded product thereof in a gear oven according to JIS K7212.
2. The heat-resistant, water-resistant, flame-resistant, insulated wire according to claim 1, wherein the Izod impact strength in the thermal stability test at 0 ° C. for 10 days is 60% or more of the Izod impact strength before the thermal stability test. cable. 20. The resin composition has a volume resistivity of 1 × 10 ¹⁰ after the molded article is immersed in ion-exchanged water at 95 ° C. for 48 hours or at 70 ° C. for 168 hours.
The heat-resistant, water-resistant, insulating, flame-retardant insulated wires and cables according to claim 1, which have a resistance of not less than Ω · cm. 21. The resin composition has a volume resistivity of 1 × 10 ¹³ after the molded article is immersed in ion-exchanged water at 95 ° C. for 48 hours or at 70 ° C. for 168 hours.
The heat-resistant, water-resistant, insulating, flame-retardant insulated wires and cables according to claim 1, which have a resistance of not less than Ω · cm. 22. An ultraviolet absorber and / or a light stabilizer is further added to 0.01 parts by weight of 100 parts by weight of the synthetic resin.
The heat-resistant, water-resistant, insulation-resistant, flame-retardant insulated wire and cable according to claim 1, which is blended in an amount of from 10 to 10 parts by weight. 23. An ultraviolet absorber and / or a light stabilizer (d) is further added to 0.1 to 100 parts by weight of the synthetic resin.
3. The heat-resistant, water-resistant, insulation-resistant, flame-retardant insulated wires and cables according to claim 1, which are mixed in an amount of 5 parts by weight. 24. The ultraviolet absorber is at least one member selected from the group consisting of benzotriazole, benzophenone, salicylate and cyanoacrylate, and the light stabilizer is a hindered amine. Heat resistant deterioration resistant water resistant insulation flame retardant insulated wires and cables. 25. When the resin composition is subjected to outdoor exposure for one year according to the outdoor exposure test method of JIS A1410, a molded article from the resin composition has a tensile strength, an elongation rate, and an Izod impact strength before any outdoor exposure. The heat-resistant, water-resistant, flame-retardant, insulated wire and cable according to claim 1, wherein 60% or more is maintained. 26. (a) 100 parts by weight of synthetic resin, (b) 10 to 500 parts by weight of magnesium hydroxide particles, (c) 0.0 of an antioxidant and / or a metal deactivator.
1 to 10 parts by weight of the resin composition, wherein the magnesium hydroxide particles have the following requirements (i) to (iv): (i) an average secondary particle diameter measured by a laser diffraction scattering method of 10 μm or less. (Ii) The BET specific surface area is 20 m ² / g or less (iii) The total content of the Fe compound and the Mn compound is 0.02% by weight or less in terms of metal (iv) The content of the water-soluble alkali metal compound A heat-resistant, water-resistant, insulating, flame-retardant molded article formed of a resin composition having a total of 0.05% by weight or less in terms of alkali metal in terms of alkali metal.