JP2019085553A - Flame-retardant resin composition, and molded article, insulated wire, cable, and optical fiber cable using the same - Google Patents

Abstract

To provide a flame-retardant resin composition having excellent flame retardancy and processability, and to provide a molded article, an insulated wire, and a cable using the same.SOLUTION: The flame-retardant resin composition contains a polyolefin resin (A), a phosphate compound (B), an organophosphorus compound (C), and an ester compound (D). The phosphate compound (B) contains a salt of a phosphoric acid of formula (1) and an amine compound. The organophosphorus compound (C) has a spiro structure. (In the formula, m represents an integer of 1-100.)SELECTED DRAWING: None

Description

  The present invention relates to a flame retardant resin composition, a molded product using the same, an insulated wire, a cable and an optical fiber cable.

  In recent years, the demand for flame retardance has become severe from the viewpoint of fire prevention for televisions, personal computers, office automation equipment such as printers, building materials, interior materials of automobiles, electronic components, cables, optical fiber cables and the like. Therefore, materials having high flame retardancy are used for these.

  As a material having such high flame retardancy, a flame retardant resin composition in which a phosphate compound is blended to a polyolefin resin is known (see Patent Document 1 below).

JP, 2014-65822, A

  The flame retardant resin composition described in Patent Document 1 exhibits excellent flame retardancy. However, the flame retardant resin composition described in Patent Document 1 has room for improvement in terms of processability.

  For this reason, the flame-retardant resin composition which has the outstanding flame retardance and can improve processability was calculated | required.

  The present invention has been made in view of the above circumstances, and has an excellent flame retardancy and a flame retardant resin composition capable of improving processability, a molded article using the same, an insulated wire, and a cable And it aims at providing an optical fiber cable.

  The present inventors repeated studies to solve the above problems. As a result, it is found that the above problems can be solved by blending a specific phosphate compound with a specific ratio to a polyolefin resin, and using a specific organophosphorus compound and a specific ester compound to form a flame retardant resin composition. The

（上記一般式（１）中、ｍは１〜１００の整数を表す。）

（上記一般式（２）中、Ｘ^１及びＸ^２は同一又は異なるものであり、下記一般式（３）で表される。）

（上記一般式（３）中、ＡＬは炭素数１〜５の分岐状又は直鎖状の脂肪族炭化水素基であり、Ａｒは、置換基を有してもよいフェニル基、ナフチル基又はアントリル基であり、ＡＬ中の任意の炭素原子に結合する。ｎは１〜３の整数を示す。） That is, the present invention comprises a polyolefin resin (A), a phosphate compound (B), an organic phosphorus compound (C), and an ester compound (D), and the phosphate compound (B) is the polyolefin described above. The phosphate compound (B) is compounded in a proportion of 70 parts by mass or more with respect to 100 parts by mass of the resin (A), and at least one phosphoric acid represented by the following general formula (1) The organic phosphorus compound (C) is represented by the following general formula (2), and the ester compound (D) is selected from the group consisting of a monoester compound and a diester compound. A flame retardant resin composition containing at least one of

(In the above general formula (1), m represents an integer of 1 to 100.)

(In the above general formula (2), X ¹ and X ² are the same or different and are represented by the following general formula (3).)

(In the above general formula (3), AL is a branched or linear aliphatic hydrocarbon group having 1 to 5 carbon atoms, and Ar is a phenyl group which may have a substituent, a naphthyl group or an anthryl group. Group, and is bonded to any carbon atom in AL, n is an integer of 1 to 3)

  The flame retardant resin composition of the present invention has excellent flame retardancy and can improve processability.

  The present inventors speculate as to the reason why the flame retardant resin composition of the present invention has excellent flame retardancy.

  That is, the phosphate compound contains a salt of the phosphoric acid represented by the general formula (1) and an amine compound having at least one amino group in the molecule, and the flame retardant resin composition Produces a compact foam insulation layer upon combustion. For this reason, combustion of polyolefin resin is suppressed and a self-extinguishing property is provided to a flame retardant resin composition. Here, when other flame retardants such as metal hydroxides and silicone compounds are used in combination with the above-mentioned phosphate compound, the formation of a dense foam insulation layer is inhibited. On the other hand, the organic phosphorus compound represented by the above general formula (2) is considered to suppress the combustion of the polyolefin resin by the radical trapping action in the solid phase. And since the said organic phosphorus compound has a phosphonic acid compound in frame | skeleton, it is thought that it is compatible with the flame retardant which consists of a phosphate compound. In addition, since the above organophosphorus compound has a pentaerythritol ester having a function of promoting carbonization at the time of combustion as a skeleton, unlike the other flame retardants such as metal hydroxides and silicone compounds, the formation of a compact foamed heat insulation layer Is considered to be difficult to inhibit. Furthermore, in the flame retardant resin composition of the present invention, the temperature at which the radical trapping action is exhibited is close to the temperature at which the compact foam insulation layer is formed, and the temperature of the flame retardant resin composition is self It is thought that the fire extinguishing ability will increase rapidly. Furthermore, since the ester compound contains a hydroxyl group having dehydrating ability, it is considered that it functions as a flame retardant auxiliary. From the above, it is considered that the flame retardant resin composition of the present invention has excellent flame retardancy.

  Although the reason why the flame retardant resin composition of the present invention can improve the processability is not clear, the present inventors speculate as follows.

  That is, since the organic phosphorus compound has a planar molecular structure and has few steric hindrances, when the flame retardant resin composition is processed by using the phosphate compound and the organic phosphorus compound in combination. It can be considered that the liquidity can be improved. In addition, since the ester compound has a smaller polarity and a lower melting point than polyhydric alcohols, it is considered that uniform dispersion in a polyolefin resin is possible. Therefore, it is considered that the flame retardant resin composition can improve the processability.

  In the above flame retardant resin composition, it is preferable that the organic phosphorus compound (C) is blended in a ratio of more than 0 parts by mass and less than 50 parts by mass with respect to 100 parts by mass of the polyolefin resin (A) .

  In this case, the flame retardancy of the flame retardant resin composition can be further improved as compared to the case where the blending ratio of the organophosphorus compound (C) with respect to 100 parts by mass of the polyolefin resin (A) is 50 parts by mass or more. . In addition, the processability and flame retardancy of the flame retardant resin composition can be further improved as compared with the case where the blending ratio of the organophosphorus compound (C) with respect to 100 parts by mass of the polyolefin resin (A) is 0 parts by mass. it can.

  In the said flame retardant resin composition, it is preferable that the said ester compound (D) is mix | blended in the ratio of less than 5 mass parts more than 0 mass part with respect to 100 mass parts of said polyolefin resin (A).

  In this case, more excellent flame retardancy and processability are obtained in the flame retardant resin composition as compared to the case where the blending ratio of the ester compound (D) to 100 parts by mass of the polyolefin resin (A) is 0 parts by mass. Be Moreover, compared with the case where the compounding ratio of the ester compound (D) with respect to 100 mass parts of polyolefin resin (A) is 5 mass parts or more, the bloom in a flame-retardant resin composition can be suppressed more sufficiently. Although the reason why the flame retardant resin composition can suppress bloom is not clear here, the present inventors speculate as follows.

  That is, as described above, since the organophosphorus compound has a phosphonic acid compound in its skeleton, it is considered that the organophosphorus compound has good compatibility with the phosphate compound. Further, as described above, it is considered that the ester compound has smaller polarity compared to the polyhydric alcohol, and the melting point is also low, so that uniform dispersion in the polyolefin resin becomes possible. Therefore, it is considered that the flame retardant resin composition can suppress bloom.

In the flame-retardant resin composition, it is preferred X ¹ and X ² in the general formula (2) is a benzyl group.

In this case, more excellent processability can be obtained in the flame retardant resin composition as compared to the case where X ¹ and X ² in the general formula (2) are not a benzyl group.

  In the above flame retardant resin composition, m in the general formula (1) is 1 to 2, and the amine compound is an amine compound containing a triazine ring, an amine compound containing a piperazine ring, and an amine containing a triazine ring It is preferred to be composed of a mixture with the compound, ammonia, or guanidyl urea.

  In this case, the flame retardancy of the flame retardant resin composition is effectively improved.

  In the said flame retardant resin composition, it is preferable that the said amine compound is comprised with the mixture of the amine compound containing a piperazine ring, and the amine compound containing a triazine ring.

  In this case, the flame retardancy of the flame retardant resin composition is further improved as compared with the case where the amine compound is composed of an amine compound other than the above mixture.

  In the said flame retardant resin composition, it is preferable that melting | fusing point of the said ester compound (D) is 50 degreeC or more and 180 degrees C or less.

  In this case, compared with the case where the melting point of the ester compound (D) is less than 50 ° C., the ester compound (D) is sufficiently suppressed from bleeding out to the surface of the flame retardant resin composition even under high temperature environment it can. That is, the bloom in the flame retardant resin composition can be suppressed more sufficiently. In addition, since the ester compound (D) is easily melted and dispersed during processing of the flame retardant resin composition as compared to the case where the melting point of the ester compound (D) exceeds 180 ° C., the flame retardant resin composition It is possible to further improve the flame retardancy and appearance of the molded body obtained by processing.

  In the above flame retardant resin composition, it is preferable that the fluorine-based anti-drip agent (E) is further blended in a ratio of more than 0 parts by mass and less than 10 parts by mass with respect to 100 parts by mass of the polyolefin resin (A). .

  In this case, dripping can be prevented unlike the case where the blending ratio of the fluorine-based anti-drip agent (E) is 0 parts by mass with respect to 100 parts by mass of the polyolefin resin (A), and spreading of fire due to drips can be prevented, The flame retardancy of the flame retardant resin composition can be improved. In addition, the melt viscosity of the flame retardant resin composition is too high compared to when the blending ratio of the fluorine-based anti-drip agent (E) is 10 parts by mass or more to 100 parts by mass of the polyolefin resin (A) This is sufficiently suppressed, and the processability of the flame retardant resin composition is further improved.

  In the flame retardant resin composition, the polyolefin resin (A) preferably contains a polypropylene resin.

  In this case, the flame retardant resin composition can have more excellent heat resistance.

  In the said flame retardant resin composition, it is preferable that the said polyolefin resin (A) contains an elastomer.

  In this case, the flame retardant resin composition is more excellent in impact resistance and cold resistance as compared to the case where the polyolefin resin (A) does not contain an elastomer.

  In the said flame retardant resin composition, it is preferable that the content rate of the said elastomer in the said polyolefin resin (A) is 60 mass% or less.

In this case, the flame retardancy of the flame retardant resin composition can be further improved as compared to the case where the content of the elastomer in the polyolefin resin (A) exceeds 60% by mass.

  Moreover, this invention is a molded object containing the said flame-retardant resin composition.

  This molded product has excellent flame retardancy and contains a flame retardant resin composition capable of improving processability, so various applications which require both excellent flame retardancy and good appearance are required. Applicable to

  Moreover, this invention is an insulated wire provided with a conductor and the insulating layer which coats the said conductor, and the said insulating layer is comprised with the flame-retardant resin composition mentioned above.

  The insulated wire of the present invention has an excellent flame retardancy and a good appearance because it includes an insulating layer composed of a flame retardant resin composition that has excellent flame retardancy and can improve processability. It becomes possible to have.

  The present invention also includes a conductor, an insulated wire having an insulating layer covering the conductor, and a coating layer covering the insulated wire, wherein at least one of the insulating layer and the coating layer is the flame retardant. It is a cable comprised with the resin composition.

  In the cable of the present invention, at least one of the insulating layer and the covering layer has excellent flame retardancy and is composed of a flame retardant resin composition capable of improving the processability, so the excellent flame retardancy is excellent. And it becomes possible to have a good appearance.

  Furthermore, the present invention comprises an optical fiber and a covering portion for covering the optical fiber, the covering portion having an insulator for covering the optical fiber, and the insulator having the flame retardant resin composition described above It is an optical fiber cable composed of objects.

  In the optical fiber cable according to the present invention, since the insulator that covers the optical fiber in the coating portion has excellent flame retardancy and is made of a flame retardant resin composition that can improve processability, It is possible to have excellent flame retardancy and a good appearance.

  ADVANTAGE OF THE INVENTION According to this invention, it has the outstanding flame retardance and the flame-retardant resin composition which can improve workability, the molded object using the same, an insulated wire, a cable, and an optical fiber cable are provided.

FIG. 1 is a partial side view showing an embodiment of a cable of the present invention. It is sectional drawing along the II-II line of FIG. 1 is a cross-sectional view showing an embodiment of the optical fiber cable of the present invention.

  Hereinafter, embodiments of the present invention will be described in detail.

（上記一般式（１）中、ｍは１〜１００の整数を表す。）

（上記一般式（２）中、Ｘ^１及びＸ^２は同一又は異なるものであり、下記一般式（３）で表される。）

（上記一般式（３）中、ＡＬは炭素数１〜５の分岐状又は直鎖状の脂肪族炭化水素基であり、Ａｒは、置換基を有してもよいフェニル基、ナフチル基又はアントリル基であり、ＡＬ中の任意の炭素原子に結合する。ｎは１〜３の整数を示す。） <Flame retardant resin composition>
The flame retardant resin composition of the present invention comprises a polyolefin resin (A), a phosphate compound (B), an organic phosphorus compound (C) and an ester compound (D). Here, the phosphate compound (B) is mix | blended in the ratio of 70 mass parts or more with respect to 100 mass parts of polyolefin resin (A). The phosphate compound (B) contains a salt of phosphoric acid represented by the following general formula (1) and an amine compound having at least one amino group in the molecule, and the organic phosphorus compound (C) is It is represented by the general formula (2). Moreover, an ester compound (D) contains at least 1 sort (s) chosen from the group which consists of a monoester compound and a diester compound.

(In the above general formula (1), m represents an integer of 1 to 100.)

(In the above general formula (2), X ¹ and X ² are the same or different and are represented by the following general formula (3).)

(In the above general formula (3), AL is a branched or linear aliphatic hydrocarbon group having 1 to 5 carbon atoms, and Ar is a phenyl group which may have a substituent, a naphthyl group or an anthryl group. Group, and is bonded to any carbon atom in AL, n is an integer of 1 to 3)

  The flame retardant resin composition of the present invention has excellent flame retardancy and can improve processability.

  Hereinafter, the polyolefin resin (A), the phosphate compound (B), the organic phosphorus compound (C) and the ester compound (D) will be described in detail.

(A) Polyolefin Resin A polyolefin resin has a structural unit derived from an olefin (unsaturated aliphatic hydrocarbon) in the molecule, and the polyolefin resin comprises homopolymers of olefins and copolymer weights of olefins different from each other. Besides coalescence, copolymers of olefins and non-olefins are also included. Specific examples of the polyolefin resin include, for example, polyethylene (PE), polypropylene (PP), ethylene-ethyl acrylate copolymer (EEA), ethylene-vinyl acetate copolymer (EVA), ethylene-propylene copolymer and elastomer Etc. These can be used alone or in combination of two or more.

  Elastomers include, for example, modified polypropylene-based elastomers, olefin crystals-ethylene-butylene-olefin crystal copolymers (CEBC copolymers), styrene-based elastomers, and hydrogenated products modified with these. . These can be used alone or in combination of two or more.

  Examples of styrene-based elastomers include styrene-butadiene rubber (SBR), styrene-ethylene-butadiene-styrene copolymer (SEBS copolymer), styrene-propylene-butadiene-styrene copolymer (SPBS copolymer), styrene Block copolymers of olefin and styrene, such as-butadiene-styrene copolymer (SBS copolymer) and styrene-isoprene-styrene copolymer (SIS copolymer). These can be used alone or in combination of two or more.

  Examples of the hydrogenated substance include hydrogenated SBR, hydrogenated SEBS copolymer, hydrogenated SPBS copolymer, hydrogenated SBS copolymer, and hydrogenated SIS copolymer. These can be used alone or in combination of two or more.

  It is preferable that polyolefin resin (A) contains a polypropylene resin among the said specific examples. In this case, the flame retardant resin composition can have more excellent heat resistance as compared to the case where the polyolefin resin (A) does not contain a polypropylene resin.

  In this case, the content of the polypropylene resin in the polyolefin resin (A) is not particularly limited, but is preferably 30 to 100% by mass.

  The polyolefin resin (A) preferably contains an elastomer in the above specific examples. In this case, the flame retardant resin composition is more excellent in impact resistance and cold resistance as compared to the case where the polyolefin resin (A) does not contain an elastomer.

  The polyolefin resin (A) preferably further includes an elastomer in addition to the polypropylene resin. In this case, the flame retardant resin composition is more excellent in impact resistance and cold resistance as compared to the case where the polyolefin resin (A) does not contain an elastomer. Moreover, compared with the case where polyolefin resin (A) does not contain a polypropylene resin, a flame retardant resin composition is more excellent in heat resistance.

  In this case, the content of the elastomer in the polyolefin resin (A) is not particularly limited, but is preferably 60% by mass or less. In this case, the flame retardancy of the flame retardant resin composition can be further improved as compared to the case where the content of the elastomer in the polyolefin resin (A) exceeds 60% by mass. Moreover, it is more preferable that the content rate of the elastomer in polyolefin resin (A) is less than 40 mass%. In this case, the flame retardancy of the flame retardant resin composition can be further improved as compared to the case where the content of the elastomer in the polyolefin resin (A) is 40% by mass or more. The content of the elastomer in the polyolefin resin (A) is particularly preferably 20% by mass or less. In this case, the flame retardancy of the flame retardant resin composition can be further improved as compared with the case where the content of the elastomer in the polyolefin resin (A) exceeds 20% by mass. However, the content of the elastomer in the polyolefin resin (A) is preferably 10% by mass or more. In this case, the processability of the flame retardant resin composition can be further improved as compared with the case where the content of the elastomer in the polyolefin resin (A) is less than 10% by mass.

(B) Phosphate Compound As described above, the phosphate compound comprises a salt of the phosphoric acid represented by the above general formula (1) and an amine compound having at least one amino group in the molecule. It contains a phosphoric acid amine salt compound. Here, "amino group" includes not only -NH ₂ but also -NH-.

  In the above general formula (1), m is preferably 1 or 2. In this case, the flame retardant resin composition has more excellent flame retardancy than the case where m is 3 or more.

  Specific examples of the phosphoric acid represented by the above general formula (1) include polyphosphoric acids such as pyrophosphoric acid and triphosphoric acid, and monophosphoric acids such as orthophosphoric acid.

  Examples of the amine compound include aliphatic diamines, amine compounds containing a piperazine ring, amine compounds containing a triazine ring, ammonia, and guanylurea. These can be used alone or in combination of two or more.

  As aliphatic diamines, those having 1 to 15 carbon atoms are preferably used. Examples of such aliphatic diamines include N, N, N ', N'-tetramethyldiaminomethane, ethylenediamine, N, N'-dimethylethylenediamine, N, N'-diethylethylenediamine, N, N-dimethylethylenediamine, N, N-diethylethylenediamine, N, N, N ', N'-tetramethylethylenediamine, N, N, N', N'-diethylethylenediamine, 1,2-propanediamine, 1,3-propanediamine, tetramethylene Diamines, pentamethylenediamine, hexamethylenediamine, 1,7-diaminoheptane, 1,8-diaminooctane, 1,9-diaminononane and 1,10-diaminodecane. These can be used alone or in combination of two or more.

  Examples of the amine compound containing a piperazine ring include piperazine, trans-2,5-dimethylpiperazine, 1,4-bis (2-aminoethyl) piperazine, and 1,4-bis (3-aminopropyl) piperazine. These can be used alone or in combination of two or more.

  Examples of amine compounds containing a triazine ring include melamine, acetoguanamine, benzoguanamine, acrylic guanamine, 2,4-diamino-6-nonyl-1,3,5-triazine, 2,4-diamino-6-hydroxy-1, 3,5-Triazine, 2-amino-4,6-dihydroxy-1,3,5-triazine, 2,4-diamino-6-methoxy-1,3,5-triazine, 2,4-diamino-6 -Ethoxy-1,3,5-triazine, 2,4-diamino-6-propoxy-1,3,5-triazine, 2,4-diamino-6-isopropoxy-1,3,5-triazine, 2, Examples include 4-diamino-6-mercapto-1,3,5-triazine and 2-amino-4,6-dimercapto-1,3,5-triazine. These can be used alone or in combination of two or more.

  The above amine compound is an amine compound containing a triazine ring, a mixture of an amine compound containing a piperazine ring and an amine compound containing a triazine ring when m in the general formula (1) representing phosphoric acid is 1 to 2 Preferably, it is composed of ammonia or guanidyl urea. In this case, the flame retardancy of the flame retardant resin composition is effectively improved.

  The amine compound is preferably composed of a mixture of an amine compound containing a piperazine ring and an amine compound containing a triazine ring. In this case, the flame retardancy of the flame retardant resin composition is further improved as compared with the case where the amine compound is composed of an amine compound other than the above mixture. Here, the content of the amine compound containing a piperazine ring in the above mixture is preferably 20 to 55% by mass. In this case, more excellent flame retardancy can be obtained in the flame retardant resin composition as compared with the case where the content of the amine compound containing a piperazine ring in the above mixture is out of the above range.

  The phosphate compound is blended at a ratio of 70 parts by mass or more to 100 parts by mass of the polyolefin resin (A) as described above. In this case, more excellent flame retardancy can be obtained in the flame retardant resin composition as compared with the case where the blending ratio of the phosphate compound is less than 70 parts by mass.

  It is preferable that the compounding ratio of the phosphate compound with respect to 100 mass parts of polyolefin resin (A) is less than 120 mass parts. In this case, the processability of the flame retardant resin composition can be further improved as compared to the case where the blending ratio of the phosphate compound to 100 parts by mass of the polyolefin resin (A) is 120 parts by mass or more. The blending ratio of the phosphate compound to 100 parts by mass of the polyolefin resin (A) is more preferably 100 parts by mass or less, and 90 parts by mass or less from the viewpoint of further improving the processability of the flame retardant resin composition. Is particularly preferred.

  It is preferable that the compounding ratio of the phosphate compound with respect to 100 mass parts of polyolefin resin (A) is 80 mass parts or more. In this case, more excellent flame retardancy can be obtained in the flame retardant resin composition as compared with the case where the blending ratio of the phosphate compound is less than 80 parts by mass.

  It is even more preferable that the blending ratio of the phosphate compound to 100 parts by mass of the polyolefin resin (A) is 90 parts by mass or more.

(C) Organophosphorus Compound As described above, the organophosphorus compound (C) is represented by the above general formula (2).

X ¹ and X ² in the general formula (2) are represented by the general formula (3). X ¹ and X ² may be identical to or different from each other.

  AL in the general formula (3) is a branched or linear aliphatic hydrocarbon group having 1 to 5 carbon atoms, and the carbon number of the aliphatic hydrocarbon group is 1 or 2 preferable. Further, Ar in the above general formula (3) is a phenyl group which may have a substituent, a naphthyl group or an anthryl group, and is bonded to any carbon atom in AL. Among them, a phenyl group is preferable as Ar. Furthermore, in the above general formula (3), n is an integer of 1 to 3, but n is preferably 1 or 2.

X ¹ and X ² in the general formula (2) are particularly preferably a benzyl group (phenylmethyl group). In this case, more excellent processability can be obtained in the flame retardant resin composition as compared to the case where X ¹ and X ² in the general formula (2) are not a benzyl group.

  As described above, the organophosphorus compound (C) is preferably blended in a proportion of more than 0 parts by mass and less than 50 parts by mass with respect to 100 parts by mass of the polyolefin resin (A). In this case, the flame retardancy of the flame retardant resin composition can be further improved as compared to the case where the blending ratio of the organophosphorus compound (C) with respect to 100 parts by mass of the polyolefin resin (A) is 50 parts by mass or more. . In addition, the processability and flame retardancy of the flame retardant resin composition can be further improved as compared with the case where the blending ratio of the organophosphorus compound (C) with respect to 100 parts by mass of the polyolefin resin (A) is 0 parts by mass. it can.

  It is preferable that the compounding ratio of the organophosphorus compound (C) with respect to 100 mass parts of polyolefin resin (A) is 1 mass part or more. In this case, the processability and flame retardancy more excellent in the flame retardant resin composition as compared with the case where the blending ratio of the organophosphorus compound (C) with respect to 100 parts by mass of the polyolefin resin (A) is less than 1 part by mass Is obtained. The compounding ratio of the organic phosphorus compound (C) to 100 parts by mass of the polyolefin resin (A) is 2.5 parts by mass or more from the viewpoint of further improving the processability and the flame retardancy of the flame retardant resin composition. Is more preferably 5 parts by mass or more, still more preferably 8 parts by mass or more, and particularly preferably 10 parts by mass or more.

  It is preferable that the compounding ratio of the organophosphorus compound (C) with respect to 100 mass parts of polyolefin resin (A) is 40 mass parts or less. In this case, the flame retardancy of the flame retardant resin composition can be further improved as compared to the case where the blending ratio of the organic phosphorus compound (C) with respect to 100 parts by mass of the polyolefin resin (A) exceeds 40 parts by mass. It is preferable that the compounding ratio of the organophosphorus compound (C) with respect to 100 mass parts of polyolefin resin (A) is 30 mass parts or less.

(D) Ester Compound The ester compound (D) functions to improve the processability of the flame retardant resin composition and to function as a flame retardant auxiliary to improve the flame retardancy of the flame retardant resin composition. The ester compound (D) contains at least one selected from the group consisting of monoester compounds and diester compounds.

  The ester compound (D) is an ester compound of polyhydric alcohol and fatty acid. The above ester compound necessarily has a hydroxyl group in the molecule, and thus can have a dehydration ability and can function as a flame retardant auxiliary.

  The polyhydric alcohol may have a valence of 2 or more, but is preferably 4 to 10. Examples of polyhydric alcohols include pentaerythritol, sorbitol, sorbitan, and condensed dimers or trimers of these. These can be used alone or in combination of two or more.

  The fatty acids include, for example, saturated fatty acids and unsaturated fatty acids. Examples of saturated fatty acids include palmitic acid, higher saturated fatty acids such as stearic acid, and saturated fatty acid diacids such as adipic acid. Examples of unsaturated fatty acids include unsaturated higher fatty acids such as oleic acid and erucic acid. Here, "higher" means that the number of carbon atoms of the fatty acid is 6 or more. In the case of higher fatty acids, the number of carbon atoms is preferably 12 to 18 because they are easily available in terms of price and amount.

  Specific examples of the ester compound (D) include, for example, pentaerythritol monostearate, sorbitan monostearate, glycerol monostearate, dipentaerythritol adipate, dipentaerythritol adipate and the like.

  The melting point of the ester compound (D) is preferably 50 ° C. or more and 180 ° C. or less. In this case, compared with the case where the melting point of the ester compound (D) is less than 50 ° C., the ester compound (D) is sufficiently suppressed from bleeding out to the surface of the flame retardant resin composition even under high temperature environment it can. That is, the bloom of the flame retardant resin composition can be suppressed more sufficiently. In addition, since the ester compound (D) is easily melted and dispersed during processing of the flame retardant resin composition as compared to the case where the melting point of the ester compound (D) exceeds 180 ° C., the flame retardant resin composition It is possible to further improve the flame retardancy and appearance of the molded body obtained by processing.

  The melting point of the ester compound (D) is preferably 100 ° C. or less. In this case, the processability of the flame retardant resin composition can be further improved. The melting point of the ester compound (D) is more preferably 70 ° C. or less.

  It is preferable that an ester compound (D) is mix | blended in the ratio of less than 5 mass parts more than 0 mass part with respect to 100 mass parts of polyolefin resin (A) as mentioned above. In this case, the ester compound (D) bleeds out to the surface of the flame retardant resin composition as compared to the case where the blending ratio of the ester compound (D) to 100 parts by mass of the polyolefin resin (A) is 5 parts by mass or more. Can be suppressed more sufficiently. That is, compared with the case where the blending ratio of the ester compound (D) with respect to 100 parts by mass of the polyolefin resin (A) is 5 parts by mass or more, bloom in the flame retardant resin composition can be sufficiently suppressed. Moreover, compared with the case where the compounding ratio of the ester compound (D) with respect to 100 mass parts of polyolefin resin (A) is 0 mass part, the flame retardance and processability of a flame retardant resin composition can be improved more. .

  The blending ratio of the ester compound (D) to 100 parts by mass of the polyolefin resin (A) is more preferably 0.5 parts by mass or more. In this case, the processability and flame retardancy of the flame retardant resin composition are further improved compared to the case where the blending ratio of the ester compound (D) to 100 parts by mass of the polyolefin resin (A) is less than 0.5 parts by mass. It can be done.

  It is even more preferable that the blending ratio of the ester compound (D) to 100 parts by mass of the polyolefin resin (A) is 1 part by mass or more. In this case, the processability and flame retardancy of the flame retardant resin composition are further improved as compared with the case where the blending ratio of the ester compound (D) to 100 parts by mass of the polyolefin resin (A) is less than 1 part by mass. Can.

  It is particularly preferable that the blending ratio of the ester compound (D) to 100 parts by mass of the polyolefin resin (A) is 2 parts by mass or more. In this case, the processability of the flame retardant resin composition can be further improved as compared with the case where the blending ratio of the ester compound (D) to 100 parts by mass of the polyolefin resin (A) is less than 2 parts by mass.

  The flame retardant resin composition of the present invention further comprises a fluorine drip inhibitor (E) in addition to the above-mentioned polyolefin resin (A), phosphate compound (B), organic phosphorus compound (C) and ester compound (D). May be included. The fluorine-based anti-drip agent (E) will be described in detail below.

(E) Fluorine-based anti-drip agent Fluorine-based anti-drip agent (E) contains a fluorine-containing compound containing fluorine and is capable of preventing resin dripping or dripping of molten resin at the time of combustion. The fluorine-containing compound may be, for example, a fluorine-based resin such as polytetrafluoroethylene (hereinafter referred to as "PTFE"), polyvinylidene fluoride, or polyhexafluoropropylene. The fluorine-containing compound may be unmodified or may be modified, but is preferably modified. In this case, as compared with the case where the fluorine-containing compound is not modified, the fluorine-containing compound fibrillates efficiently, and the dispersibility in the flame retardant resin composition is further improved. As a result, the anti-drip function of the fluorine-based anti-drip agent (E) can be further improved. Moreover, since the melt tension of the flame retardant resin composition is further increased, the processability and moldability of the flame retardant resin composition can be further improved. Examples of the fluorine-containing compound which has been modified include acid-modified polytetrafluoroethylene.

  The fluorine-based anti-drip agent (E) is preferably blended in a ratio of more than 0 parts by mass and less than 10 parts by mass with respect to 100 parts by mass of the polyolefin resin (A). In this case, dripping can be prevented unlike the case where the blending ratio of the fluorine-based anti-drip agent (E) is 0 parts by mass with respect to 100 parts by mass of the polyolefin resin (A), and spreading of fire due to drips can be prevented, The flame retardancy of the flame retardant resin composition can be improved. In addition, the melt viscosity of the flame retardant resin composition is too high compared to when the blending ratio of the fluorine-based anti-drip agent (E) is 10 parts by mass or more to 100 parts by mass of the polyolefin resin (A) This is sufficiently suppressed, and the processability of the flame retardant resin composition is further improved.

  The blending ratio of the fluorine-based anti-drip agent (E) to 100 parts by mass of the polyolefin resin (A) is more preferably 0.5 parts by mass or more. In this case, compared with the case where the blending ratio of the fluorine-based anti-drip agent (E) is less than 0.5 parts by mass with respect to 100 parts by mass of the polyolefin resin (A), more excellent flame retardancy in the flame retardant resin composition Is obtained. Furthermore, the blending ratio of the fluorine-based anti-drip agent (E) with respect to 100 parts by mass of the polyolefin resin (A) is more preferably 2 parts by mass or more.

  However, the blending ratio of the fluorine-based anti-drip agent (E) to 100 parts by mass of the polyolefin resin (A) is more preferably 5 parts by mass or less. In this case, the melt viscosity of the flame retardant resin composition becomes too high compared to when the blending ratio of the fluorine-based anti-drip agent (E) with respect to 100 parts by mass of the polyolefin resin (A) exceeds 5 parts by mass. This is sufficiently suppressed, and the processability of the flame retardant resin composition is further improved.

  From the viewpoint of further improving the processability of the flame retardant resin composition, the blending ratio of the fluorine-based anti-drip agent (E) to 100 parts by mass of the polyolefin resin (A) is more preferably 3 parts by mass or less .

  The above flame retardant resin composition is an antioxidant, a heat deterioration inhibitor, an ultraviolet absorber, a light resistant agent, an antifogging agent, a coloring agent, a filler, a crosslinking agent, as long as the flame retardancy and processability are not affected. It may further contain an agent, a blowing agent, a heat dissipating agent and the like as needed.

  The flame retardant resin composition comprises a polyolefin resin (A), a phosphate compound (B), an organic phosphoric acid compound (C), an ester compound (D) and, if necessary, a fluorine drip inhibitor (E). It can be obtained by kneading. Kneading is performed using the heat necessary to melt the polyolefin resin (A), the phosphate compound (B), the organic phosphoric acid compound (C), the ester compound (D) and, if necessary, a fluorine-based drip inhibitor ( E) It can be carried out using a kneader capable of giving and processing necessary shear to disperse. As a kneader, an open roll, a twin screw extruder, a Banbury mixer, a pressure kneader etc. can be used, for example.

<Molded body>
Next, the molded article of the present invention will be described.

  The molded article of the present invention contains the flame retardant resin composition described above. This molded product has excellent flame retardancy and contains a flame retardant resin composition capable of improving processability, so various applications which require both excellent flame retardancy and good appearance are required. Applicable to Such applications include, for example, TV back panels, capacitor cases, insulating films inside keyboards, panels inside heaters, flame-retardant sheets in buildings, dashboards for cars, packaging materials, housings for home appliances, etc. Be

  As a shape of the molded object of this invention, although sheet shape, plate shape, etc. are mentioned, for example, as a shape of a molded object, a sheet shape is preferable.

  The molded body can be obtained by molding the flame retardant resin composition using, for example, an extrusion molding method, an injection molding method, a vacuum molding method, a press molding method or the like. A molded object may be comprised with a flame-retardant resin composition single-piece | unit, and depending on a use, it may be comprised combining reinforcing materials, such as a flame-retardant resin composition and glass cloth, paper.

<Cable>
Next, the cable of the present invention will be described with reference to FIG. 1 and FIG. FIG. 1 is a partial side view showing an embodiment of a cable according to the present invention. FIG. 2 is a cross-sectional view taken along line II-II of FIG.

  As shown in FIGS. 1 and 2, the cable 10 includes an insulated wire 4 and a tubular covering layer 3 that covers the insulated wire 4. And the insulated wire 4 has the conductor 1 and the tube-shaped insulating layer 2 which coats the conductor 1.

  Here, the tubular insulating layer 2 and the covering layer 3 are composed of the above-described flame retardant resin composition, and the above-described flame retardant resin composition has excellent flame retardancy and improves processability. be able to. Therefore, the insulating layer 2 and the covering layer 3 made of the above-mentioned flame retardant resin composition can have excellent flame retardancy and a good appearance. Thus, the cable 10 can have excellent flame retardancy and a good appearance.

(conductor)
The conductor 1 may be configured by only one strand or may be configured by bundling a plurality of strands. Moreover, the conductor 1 is not specifically limited about the diameter of a conductor, the material of a conductor, etc., According to a use, it can define suitably. The material of the conductor 1 includes a metal conductor and a nonmetal conductor. As a metal conductor, copper, aluminum, or an alloy containing them is preferable, for example. As the nonmetal conductor, for example, a conductive material such as a carbon material can be used. In addition, when the conductor 1 is comprised with a metal conductor, the cable 10 turns into a metal cable.

(Cover layer)
The covering layer 3 is a so-called sheath, which protects the insulating layer 2 from physical or chemical damage.

<Optical fiber cable>
Next, the optical fiber cable of the present invention will be described with reference to FIG. FIG. 3 is a cross-sectional view showing an embodiment of the optical fiber cable of the present invention.

  As shown in FIG. 3, the optical fiber cable 20 includes two tension members 22 and 23, an optical fiber 24, and a covering portion 25 that covers these. Here, the optical fiber 24 is provided so as to penetrate the covering portion 25. Here, the covering portion 25 is made of an insulator that covers the optical fiber 24, and the insulator is made of the flame retardant resin composition that constitutes the insulating layer 2 and the covering layer 3 of the insulated wire 4 in the above embodiment. Be done.

  Here, the coating | coated part 25 is comprised with the flame-retardant resin composition mentioned above, the flame-retardant resin composition mentioned above has the outstanding flame retardance, and can improve workability. For this reason, it becomes possible for the coating | coated part 25 comprised with the said flame retardant resin composition to have the outstanding flame retardance and a favorable external appearance. Thus, the optical fiber cable 20 can have excellent flame retardancy and a good appearance.

  The present invention is not limited to the above embodiment. For example, although the cable 10 having one insulated wire 4 is used as the cable in the above embodiment, the cable of the present invention is not limited to the cable having one insulated wire 4, and the covering layer 3 The cable which has two or more insulated wires 4 inside may be used. In addition, a resin portion made of polypropylene or the like may be provided between the covering layer 3 and the insulated wire 4.

  Moreover, in the said embodiment, although the insulating layer 2 and the coating layer 3 of the insulated wire 4 are comprised by said flame-retardant resin composition, the insulating layer 2 is comprised with normal insulating resin, and only the coating layer 3 And the above-mentioned flame retardant resin composition.

  In addition, in the optical fiber cable 20, although the coating | coated part 25 is comprised with the insulator, the coating | coated part 25 may further have a coating | coated body which coat | covers an insulator. Here, the covering may or may not be constituted by the flame retardant resin composition constituting the insulating layer 2 and the covering layer 3 of the insulated wire 4 in the above embodiment, but the above embodiment is not limited thereto. It is preferable to be comprised with the flame-retardant resin composition which comprises the insulation layer 2 and the coating layer 3 of the insulated wire 4 in a form.

  Moreover, in the said embodiment, although the optical fiber cable 20 has the tension members 22 and 23, in the optical fiber cable of this invention, a tension member is not necessarily required and can be abbreviate | omitted.

  Hereinafter, the contents of the present invention will be more specifically described with reference to examples and comparative examples, but the present invention is not limited to the following examples.

(Examples 1-52 and Comparative Examples 1-7)
Polyolefin resin (A), phosphate compound (B), organic phosphorus compound (C), ester compound (D), non-ester compound (D *), fluorine-based anti-drip agent (E) are shown in Tables 1 to 11 It compounded by the compounding quantity shown, and knead | mixed at 180 degreeC using the open roll, and obtained the flame retardant resin composition. In Tables 1 to 11, the unit of the blending amount of each blending component is part by mass.

  Specific examples of the above-mentioned polyolefin resin (A), phosphate compound (B), organic phosphorus compound (C), ester compound (D), non-ester compound (D *) and fluorine-based anti-drip agent (E) The following were used.

(A) Polyolefin resin (A1) Block copolymer of ethylene and propylene (b-EP-1, made by Prime Polymer Co., Ltd., MFR = 3.5 g / 10 min)
(A2) Block copolymer of ethylene and propylene (b-EP-2, manufactured by Prime Polymer Co., Ltd., MFR = 30 g / 10 min)
(A3) Homo-polypropylene (h-PP, made by Prime Polymer Co., Ltd.)
(A4) High density polyethylene (HDPE, manufactured by Japan Polyethylene Corporation)
(A5) Linear low density polyethylene (LLDPE, manufactured by Sumitomo Chemical Co., Ltd.)
(A6) Modified polypropylene resin (PP Elastomer, manufactured by Mitsui Chemicals, Inc.)
(A7) Hydrogenated styrene butadiene rubber (hydrogenated SBR, manufactured by JSR Corporation)
(A8) Olefin crystal ethylene-butylene olefin crystal block copolymer (CEBC, manufactured by JSR Corporation)

(B) Phosphate Compound (B1) Flame Retardant Composed of Piperazine Pyrophosphate and Melamine Pyrophosphate (B2) Flame Retardant Composed of Piperazine Pyrophosphate, Melamine Pyrophosphate and Zinc Oxide (B3) Melamine Pyrophosphate Flame Retardant Composed of (B4) Flame Retardant Composed of Melamine Orthophosphate (B5) Flame Retardant Composed of Melamine Polyphosphate Melamine Polyphosphate is a salt of polyphosphoric acid and melamine, which is a general formula It is phosphoric acid whose m in (1) is 3 or more.
(B6) Flame Retardant Composed of Ammonium Polyphosphate The ammonium polyphosphate is a salt of polyphosphoric acid and ammonia, and the polyphosphoric acid is a phosphoric acid in which m in the general formula (1) is 3 or more.
(B7) Flame Retardant Composed of Guanylurea Phosphate Guanylurea phosphate is a salt of phosphoric acid and guanylurea, and phosphoric acid is phosphoric acid in which m in the general formula (1) is 1.
(B8) Flame Retardant Composed of Melamine / Melam / Melem Polyphosphate The melamine / melam / melem polyphosphate is a salt of polyphosphoric acid with melamine, melam and melem (double salt), and the polyphosphoric acid has a general formula It is phosphoric acid whose m in (1) is 3 or more.

(C) Organic phosphorus compound (C1) phosphonic acid-pentaerythritol ester flame retardant (in the general formula (2), a flame retardant wherein X ¹ and X ² are a benzyl group (phenylmethyl group))
(C2) Phosphonic acid-pentaerythritol ester flame retardant (in the general formula (2), a flame retardant wherein X ¹ and X ² are phenylethyl groups)
(C3) Phosphonic acid-pentaerythritol ester based flame retardant (in the general formula (2), a flame retardant wherein X ¹ and X ² are phenylpropyl group)
(C4) Phosphonic acid-pentaerythritol ester flame retardant (in the general formula (2), a flame retardant wherein X ¹ and X ² are phenylbutyl groups)
(C5) Phosphonic acid-pentaerythritol ester flame retardant (in the general formula (2), a flame retardant wherein X ¹ and X ² are phenylpentyl groups)
(C6) Phosphonic acid-pentaerythritol ester flame retardant (in the general formula (2), a flame retardant wherein X ¹ and X ² are phenyl isopropyl group)
(C7) Phosphonic acid-pentaerythritol ester flame retardant (in the general formula (2), a flame retardant wherein X ¹ and X ² are a naphthylmethyl group)
(C8) Phosphonic acid-pentaerythritol ester flame retardant (in the general formula (2), a flame retardant wherein X ¹ and X ² are anthrylmethyl groups)
(C9) Phosphonic acid-pentaerythritol ester flame retardant (in the general formula (2), a flame retardant wherein X ¹ is a phenylmethyl group and X ² is a naphthylmethyl group)

(D) Ester compound (D1) pentaerythritol monostearate (melting point: 52 ° C.)
(D2) Sorbitan monostearate (melting point: 51.5 ° C.)
(D3) Glycerol monostearate (melting point: 64 ° C.)
(D4) dipentaerythritol adipate (melting point: 180 ° C.)
(D5) Mixture of dipentaerythritol adipate and pentaerythritol adipate (melting point: 180 ° C.)

(D *) non-ester compound (D1 *) calcium stearate (D2 *) stearic acid amide (D3 *) pentaerythritol (D4 *) pentaerythritol tetrapalmitate

(E) Fluorinated anti-drip agent (E1) Acid-modified polytetrafluoroethylene particles (modified PTFE)
(E2) non-modified polytetrafluoroethylene particles (non-modified PTFE)

  The flame retardant resin compositions of Examples 1 to 52 and Comparative Examples 1 to 7 obtained as described above were evaluated for flame retardancy, processability, bloom suppression effect and specific gravity as follows. The

<Flame retardancy>
UL94 vertical combustion test (V-0 test) was performed on the 0.2 mm-thick sheet obtained by heat-pressing the flame retardant resin compositions of Examples 1 to 52 and Comparative Examples 1 to 7 at 180 ° C. The flame resistance was evaluated by the grade at that time. The results are shown in Tables 1-11. In Tables 1 to 11, the flame retardant acceptance criteria were as follows.

(Pass / fail criteria)
Pass ... V-0, V-1 or V-2
Fail · · · completely burned

  In addition, about the Example whose grade is V-0 among Examples 1-52, in order to investigate the difference of the flame retardance between these Examples, the 5V test of UL94 was further conducted. The UL94 5 V test is composed of a strip test and a flat plate test. In the strip test, strip test pieces (125 mm long × 13 mm wide × 2 mm thick) are used, and in the flat plate test Test pieces (150 mm long × 150 mm wide × 2 mm thick) were used.

And about the example which passed both the strip test and the flat plate test, it judged as "5VA", passed only the strip test, and judged as "5 VB" about the example which failed the flat plate test. If it did not pass the strip test and the flat plate test, it was judged as "full burn". The results are shown in Tables 1-11. Among the examples in which the grade is V-0, the example determined as "5 VA" has higher flame retardancy than the example determined as "5 VB", and is determined as "5 VB". The example will have higher flame retardancy than the example judged to be "full burn". Moreover, in Tables 1-11, "-" means that 5V test of UL94 was not performed.

<Processability>
About the flame-retardant resin composition of Examples 1-52 and Comparative Examples 1-7, based on JISK7210, MFR was measured on the temperature of 230 degreeC, and the conditions of 2.16 kgf of loads. Then, from this MFR value and the MFR value (MFR value of the reference comparative example) of the comparative example serving as a reference for calculating the MFR increase rate, the MFR increase rate is calculated using the following equation, and this MFR increase rate is calculated It is an index of processability. The results are shown in Tables 1-11.

MFR increase rate (%)
= 100 x (MFR value-MFR value of reference comparative example) / MFR value of reference comparative example

Comparative Example 3 was used as a reference comparative example. The reason why Comparative Example 3 is used as the reference Comparative Example is that the compounding amount of the organic phosphorus compound is 0 parts by mass, which corresponds to Patent Document 1. In Tables 1 to 11, the unit of MFR is g / 10 min. Moreover, the acceptance criteria of processability were as follows.

(Passing criteria) MFR increase rate is 10% or more

<Bloom suppression effect>
The sheet having a thickness of 1 mm obtained by press-molding the flame-retardant resin compositions of Examples 1 to 52 and Comparative Examples 1 to 7 at 190 ° C. has a greasy, sticky, powdery texture. Whether or not was checked visually. Then, when a greasy texture, stickiness and powdery texture were observed, the bloom was judged as "present", and when not observed, it was judged as "absent". The results are shown in Tables 1-11.

<Specific gravity>
The specific gravity of each of the flame retardant resin compositions of Examples 1 to 52 and Comparative Examples 1 to 8 was measured using an electronic densimeter (manufactured by Alpha Mirage). The results are shown in Tables 1-11.

  From the results shown in Tables 1 to 11, it is found that Examples 1 to 52 satisfy the pass criteria in terms of flame retardancy and processability. On the other hand, it was found that Comparative Examples 1 to 7 did not meet the acceptance criteria in at least one of the flame retardancy and the processability.

  From the above, it was confirmed that the flame retardant resin composition of the present invention has excellent flame retardancy and can improve processability.

DESCRIPTION OF SYMBOLS 1 ... conductor 2 ... insulation layer 3 ... coating layer 4 ... insulation electric wire 10 ... cable 20 ... optical fiber cable 24 ... optical fiber 25 ... coating part (insulator)

Claims (15)

Polyolefin resin (A),
A phosphate compound (B),
An organophosphorus compound (C),
Containing an ester compound (D),
The phosphate compound (B) is blended in a proportion of 70 parts by mass or more with respect to 100 parts by mass of the polyolefin resin (A),
The phosphate compound (B) contains a salt of phosphoric acid represented by the following general formula (1) and an amine compound having at least one amino group in the molecule,
The organophosphorus compound (C) is represented by the following general formula (2):
The flame retardant resin composition in which the said ester compound (D) contains at least 1 sort (s) chosen from the group which consists of a monoester compound and a diester compound.

(In the above general formula (1), m represents an integer of 1 to 100.)

(In the above general formula (2), X ¹ and X ² are the same or different and are represented by the following general formula (3).)

(In the above general formula (3), AL is a branched or linear aliphatic hydrocarbon group having 1 to 5 carbon atoms, and Ar is a phenyl group which may have a substituent, a naphthyl group or an anthryl group. Group, and is bonded to any carbon atom in AL, n is an integer of 1 to 3)   The flame retardant resin composition according to claim 1, wherein the organic phosphorus compound (C) is blended in a ratio of more than 0 parts by mass and less than 50 parts by mass with respect to 100 parts by mass of the polyolefin resin (A). .   The flame retardant resin composition according to claim 1 or 2, wherein the ester compound (D) is blended at a ratio of more than 0 parts by mass and less than 5 parts by mass with respect to 100 parts by mass of the polyolefin resin (A). object. The flame-retardant resin composition according to any one of claims 1 to 3, wherein X ¹ and X ² in the general formula (2) are a benzyl group. M in the said General formula (1) is 1-2,
The compound according to any one of claims 1 to 4, wherein the amine compound is composed of an amine compound containing a triazine ring, a mixture of an amine compound containing a piperazine ring and an amine compound containing a triazine ring, ammonia, or guanidyl urea. The flame retardant resin composition as described in 4.   The flame retardant resin composition according to any one of claims 1 to 5, wherein the amine compound is a mixture of an amine compound containing a piperazine ring and an amine compound containing a triazine ring.   The flame retardant resin composition according to any one of claims 1 to 6, wherein the melting point of the ester compound (D) is 50 ° C or more and 180 ° C or less.   The fluorine-based anti-drip agent (E) is further blended in a ratio of more than 0 parts by mass and less than 10 parts by mass with respect to 100 parts by mass of the polyolefin resin (A). Flame retardant resin composition.   The flame retardant resin composition according to any one of claims 1 to 8, wherein the polyolefin resin (A) contains a polypropylene resin.   The flame retardant resin composition according to any one of claims 1 to 9, wherein the polyolefin resin (A) contains an elastomer.   The flame retardant resin composition according to claim 10, wherein the content of the elastomer in the polyolefin resin (A) is 60% by mass or less.   The molded object containing the flame-retardant resin composition as described in any one of Claims 1-11. With a conductor,
And an insulating layer covering the conductor,
The insulated wire in which the said insulating layer is comprised with the flame-retardant resin composition as described in any one of Claims 1-11. An insulated wire comprising a conductor and an insulating layer covering the conductor;
And a covering layer covering the insulated wire.
The cable in which at least one of the said insulating layer and the said coating layer is comprised with the flame-retardant resin composition as described in any one of Claims 1-11. Optical fiber,
And a covering portion for covering the optical fiber,
The covering portion has an insulator covering the optical fiber;
The optical fiber cable comprised by the said flame retardant resin composition as described in any one of Claims 1-11.

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