JPH0820717A - Flame-retardant resin composition with good flowability - Google Patents

Abstract

PURPOSE:To obtain a flame-retardant resin compsn. which is excellent in flowability and moldability and free from molding troubles such as appearance defects or cracks by compounding a specific polyphenylene ether resin with a specific phosphoric ester compd. CONSTITUTION:This flame-retardant resin compsn. is prepd. by compounding 100 pts.wt. polyphenylene ether resin having an average intrinsic viscosity etaat 30 deg.C in chloroform of 0.28-0.50 with 0.1-30 pts.wt. phosphoric ester compd. of the formula (wherein Q1 to Q4 are each a 1-6C alkyl; R1 and R2 are each CH3; R3 and R4 are each CH3 or H; (n) is an integer of 1 or higher; n1 and n2 are each 0-2; and m1 to m4 are each 0-3). The compsn. is a nonhalogenic flame-retardant, resin, has excellent flowability and moldability unsattainable by conventional techniques, and is free from molding troubles such as appearance defects or cracks.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention comprises a specific polyphenylene ether resin and a specific phosphate compound.
The present invention relates to a flame-retardant resin composition having excellent fluidity and molding processability, and having no troubles such as appearance defects and cracks during molding.

[0002]

2. Description of the Related Art Polyphenylene ether resins are excellent in mechanical properties, electrical properties, acid resistance, alkali resistance, heat resistance, etc., and have low water absorption and good dimensional stability. It is widely used as a housing and chassis material for office automation equipment such as computers and word processors. On the other hand, however, the polyphenylene ether resin has a drawback that it is difficult to perform melt-molding processing due to its low fluidity. In order to remedy this drawback, a technique of compounding high impact polystyrene containing a polybutadiene component is disclosed in US Pat. No. 3,383,435. Further, in U.S. Pat. No. 4,154,712, it is pointed out that the processability can be improved by lowering the molecular weight of the polyphenylene ether resin.
It may adversely affect mechanical properties. It is also disclosed that an elastomeric block polymer of a vinyl aromatic compound and a conjugated diene is present together with a plasticizer such as triphenyl phosphate to maintain mechanical properties.

The polyphenylene ether resin is required to have flame retardancy as a material in many fields of its application. Phosphate ester compounds such as triphenyl phosphate are the most commonly used flame retardants in polyphenylene ether resins,
It has the function of imparting plasticity to the resin as well as improving the flame retardancy and increasing the fluidity and molding processability. However, at the same time, heat resistance and mechanical properties are deteriorated. A further serious problem is that these phosphoric acid esters volatilize from the resin phase during the molding process and adhere to the surface of the mold and the degassing portion, causing troubles during molding and poor appearance of the molded product. In particular, in the conventional resin having improved fluidity, minute cracks were generated in the end face portion, which is the resin flow end portion of the molded product, and the appearance and strength of the product were significantly reduced.

With the recent remarkable progress of office automation equipment and the like, the equipment has been highly functionalized, miniaturized and reduced in weight, and although it has been required more and more to have molding processability of materials, it has the characteristics of being practically usable. It has not been possible to provide a polyphenylene ether flame-retardant resin composition having excellent fluidity and molding processability.

[0005]

That is, the object of the present invention has excellent fluidity and molding processability, which cannot be achieved by the conventional techniques, and has a poor appearance during molding.
It is intended to provide a polyphenylene ether-based flame-retardant resin composition that does not have troubles such as cracks.

[0006]

Means for Solving the Problems The present inventors have completed the present invention as a result of extensive studies to achieve the above-mentioned object. That is, in the present invention, the following component (A) has an average intrinsic viscosity [η] of 0.28 to 30 ° C in chloroform.
100 parts by weight of 0.50 polyphenylene ether resin,
Alternatively, in chloroform, 10 to 99 parts by weight of a polyphenylene ether resin having an average intrinsic viscosity [η] at 30 ° C. of 0.28 to 0.50 and a polystyrene resin 90 to 1 are used.
With respect to 100 parts by weight in total, (B) general formula (I),

[0007]

Embedded image

(Here, Q1, Q2, Q3 and Q4 each independently represent an alkyl group having 1 to 6 carbon atoms. R1 and R2 each independently represent a methyl group, and R3 and R4 each independently represent a methyl group or hydrogen. n represents an integer greater than or equal to 1. n1 and n2 are 0 independently.
Represents an integer from 2 to 2. m1, m2, m3, and m4 each independently represent an integer of 0 to 3. The flame-retardant resin composition comprising 0.1 to 30 parts by weight of the phosphoric acid ester compound represented by the formula (1).

The polyphenylene ether resin used as the component (A) of the present invention is a homopolymer or copolymer having a repeating unit represented by the general formula (II-1) and / or (II-2). .

[0010]

Embedded image

(Here, R5, R6, R7, R8, R
9 and R10 independently represent an alkyl group having 1 to 4 carbon atoms, an aryl group, halogen, or hydrogen. However, R9 and R10 are
At the same time not hydrogen. ) A typical example of a homopolymer of polyphenylene ether resin is poly (2,6-dimethyl-1,4-phenylene).
Ether, poly (2-methyl-6-ethyl-1,4-phenylene) ether, poly (2,6-diethyl-1,4)
-Phenylene) ether, poly (2-ethyl-6-n-)
Propyl-1,4-phenylene) ether, poly (2,
6-di-n-propyl-1,4-phenylene) ether, poly (2-methyl-6-n-butyl-1,4-phenylene) ether, poly (2-ethyl-6-isopropyl-1,4-) Examples thereof include phenylene) ether, poly (2-methyl-6-hydroxyethyl-1,4-phenylene) ether, and poly (2-methyl-6-chloroethyl-1,4-phenylene) ether.

Among these, poly (2,6-dimethyl-1,
4-phenylene) ether is particularly preferred. The polyphenylene ether copolymer is a copolymer having a phenylene ether structure as a main monomer unit. For example,
Copolymer of 2,6-dimethylphenol and 2,3,6-trimethylphenol, copolymer of 2,6-dimethylphenol and o-cresol, or 2,6-dimethylphenol and 2,3,6- Examples thereof include copolymers with trimethylphenol and o-cresol.

Further, in the polyphenylene ether resin of the present invention, various other phenylene ether units which have been proposed to be present in the polyphenylene ether resin can be used unless they are contrary to the gist of the present invention. It may be included as a partial structure. As an example of what is proposed to coexist in a small amount, JP-A-1-29 is known.
2- (dialkylaminomethyl) -6 described in JP 7428 and JP-A 63-301222.
-Methylphenylene ether unit, 2- (N-alkyl-N-phenylaminomethyl) -6-methylphenylene ether unit, and the like.

Further, a polyphenylene ether resin in which a small amount of diphenoquinone or the like is bound in the main chain is also included.
Furthermore, for example, polyphenylene ether modified with a compound having a carbon-carbon double bond, as described in JP-A-2-276823, JP-A-63-108059, JP-A-59-59724 and the like. Also includes.

The average intrinsic viscosity [η] of the polyphenylene ether of the present invention in chloroform at 30 ° C. is 0.28.
˜0.50, more preferably 0.28 to 0.46. These values are the average intrinsic viscosity of the entire polyphenylene ether resin in the composition of the present invention. The polyphenylene ether resin component in the composition can be separated and analyzed by melting the composition in cold methylene chloride and then filtering, washing and drying the precipitate. When the average intrinsic viscosity of the polyphenylene ether resin in the composition exceeds 0.50, sufficient fluidity and moldability cannot be obtained, and when it is less than 0.28, sufficient physical properties cannot be obtained.

The method for producing the polyphenylene ether resin used in the present invention is not particularly limited, but, for example, according to the method described in JP-B-5-13966, in the presence of dibutylamine, 2, It can be produced by oxidative coupling polymerization of 6-xylenol. Also, the molecular weight and the molecular weight distribution are not particularly limited as long as they satisfy the requirements of the present invention.

The polystyrene resin which can be used as the component (A) of the present invention is a vinyl aromatic polymer or a rubber-modified vinyl aromatic polymer. As vinyl aromatic polymers, in addition to styrene, o-methylstyrene, p-
Nuclear alkyl-substituted styrene such as methylstyrene, m-methylstyrene, 2,4-dimethylstyrene, ethylstyrene and p-tert-butylstyrene, α-alkyl substituted such as α-methylstyrene and α-methyl-p-methylstyrene Examples thereof include polymers such as styrene, copolymers of one or more of these with at least one of other vinyl compounds, and copolymers of two or more of these. Examples of the compound copolymerizable with the vinyl aromatic compound include methacrylic acid esters such as methyl methacrylate and ethyl methacrylate, unsaturated nitrile compounds such as acrylonitrile and methacrylonitrile, and acid anhydrides such as maleic anhydride. . Among these polymers, particularly preferred polymers are polystyrene and styrene-acrylonitrile copolymer (AS resin).

Examples of the rubber used for the rubber-modified vinyl aromatic polymer include polybutadiene, styrene-butadiene copolymer, polyisoprene, butadiene-isoprene copolymer, natural rubber and ethylene-propylene copolymer. You can In particular, polybutadiene and a styrene-butadiene copolymer are preferable, and as the rubber-modified aromatic polymer, rubber-modified polystyrene (HIPS),
Rubber-modified styrene-acrylonitrile copolymer (ABS
Resin) is preferred.

The phosphoric acid ester compound used as the component (B) of the present invention is represented by the general formula (I):

[0020]

[Chemical 4]

(Here, Q1, Q2, Q3 and Q4 each independently represent an alkyl group having 1 to 6 carbon atoms. R1 and R2 each independently represent a methyl group, and R3 and R4 each independently represent a methyl group or hydrogen. n represents an integer greater than or equal to 1. n1 and n2 are 0 independently.
Represents an integer from 2 to 2. m1, m2, m3, and m4 each independently represent an integer of 0 to 3. ). General formula (I)
It is preferable that n1 and n2 are 0 and R3 and R4 are methyl groups.

In the general formula (I), m1, m2,
m3 and m4 are 0, that is, there is no substitution of an alkyl group on the terminal phenyl group, or Q1, Q2, Q3,
Most preferably, Q4 is a methyl group, that is, a terminal phenyl group is substituted with a methyl group. N in the general formula (I) is an integer of 1 or more, and heat resistance and workability vary depending on the number. The preferred range of n is 1
It is -10. The component (B) may be a mixture of n-mers.

The phosphoric acid ester compound as the component (B) of the present invention has a binding structure with a specific bifunctional phenol and a terminal structure with a specific monofunctional phenol. Examples of the bifunctional phenol include 2,2-bis (4-hydroxyphenyl) propane [commonly called bisphenol A], 2,2-bis (4-hydroxy-3-methylphenyl) propane, bis (4-hydroxyphenyl) methane, Bis (4-hydroxy-3,5-dimethylphenyl) methane, 1,1-
Examples include, but are not limited to, bisphenols such as bis (4-hydroxyphenyl) ethane. Bisphenol A is particularly preferable.

As the monofunctional phenol, unsubstituted phenol, monoalkylphenol, dialkylphenol and trialkylphenol can be used alone or as a mixture of two or more kinds. Particularly, phenol, cresol, dimethylphenol (mixed xylenol), 2,6-dimethylphenol and trimethylphenol are preferable.
The phosphoric acid ester compound as the component (B) is greatly suppressed in volatility and is excellent in stability and hydrolysis resistance. Further, it does not cause a problem such as gelation by causing a reaction with the polyphenylene ether resin, does not accelerate decomposition of the polyphenylene ether resin, and does not corrode metal parts such as a molding machine. .

The phosphoric acid ester compound as the component (B) can be obtained by reacting the above-mentioned bifunctional phenol and monofunctional phenol with phosphorus oxychloride, but the production method is not limited at all. The phosphoric acid ester of the component (B) used in the present invention is a phosphoric acid ester that is generally used within a range that does not impair the effects of the invention, for example,
Triphenyl phosphate, tricresyl phosphate, trixylenyl phosphate, cresyl diphenyl phosphate, dicresyl phenyl phosphate, hydroxyphenyl diphenyl phosphate, and other phosphoric acid esters modified with various substituents, various condensed phosphorus It may contain an acid ester compound or the like.

The resin composition of the present invention comprising a polyphenylene ether resin having a specific average intrinsic viscosity, a specific phosphoric acid ester compound, and / or a polystyrene resin is suitable for large-scale molding, thin-wall molding, high molding, and high-frequency molding required by the recent market. It has fluidity and molding processability that can correspond to high molding performance such as cycle molding. Further, in the composition of the present invention, the phosphoric acid ester compound which is a flame retardant does not evaporate from the resin phase during molding. Therefore, conventional flame retardants have adhered to the mold surface and degassing parts.Mold maintenance such as wiping of flame retardants, mold corrosion, appearance defects, deterioration of work environment, molding cost It does not cause problems such as up. In particular, when trying to improve the fluidity and molding processability, minute cracks (cracks) due to the flame retardant will occur at the end face that is the resin flow end of the molded product, significantly reducing the appearance and strength of the molded product. It is possible to provide a flame-retardant resin composition which solves the technical problem of having the resin composition of the present invention and is excellent in fluidity and molding processability and has no troubles such as poor appearance during molding and cracks.

Specific examples of the low molecular weight hydrocarbon resin that can be used as the component (C) of the present invention include petroleum resin, coumarone resin, indene resin, coumarone-indene resin, terpene resin, hydrogenated terpene resin, low Molecular weight polystyrene and the like, and those obtained by modifying these low molecular weight hydrocarbon resins with an aliphatic unsaturated carboxylic acid and its derivative, an aliphatic unsaturated dicarboxylic acid and its derivative, and a phenol resin can also be used.

The resin composition of the present invention is based on 100 parts by weight of the polyphenylene ether resin as the component (A) or 10 to 99 parts by weight of the polyphenylene ether resin and 90 to 1 parts by weight of the polystyrene resin. ,
The amount of the phosphoric acid ester compound as the component (B) is 0.1 to 30 parts by weight. If the proportion of the component (B) is too low, the flame retardancy is insufficient, and if it is too high, the heat resistance of the resin is impaired. If necessary, 1 to 15 parts by weight of the low molecular weight hydrocarbon resin (C) may be contained.

Other additives to the resin composition of the present invention, such as plasticizers, other flame retardants, etc., within the range of not impairing the effects of the present invention,
It is possible to add stabilizers such as antioxidants and ultraviolet absorbers, release agents, dyes and pigments, or fibrous reinforcing agents such as glass fibers and carbon fibers, and fillers such as glass beads, calcium carbonate and talc. it can. The method for producing the composition of the present invention is not particularly limited, and it can be produced by kneading using a kneader such as an extruder, a heating roll, a kneader, a Banbury mixer.

[0030]

EXAMPLES The present invention will be described in detail below with reference to examples, but the present invention is not limited to the following examples.
The polyphenylene ether resins used in Examples and Comparative Examples were prepared by the following manufacturing method.

(Production of polyphenylene ether resin)
: US Pat. No. 4,788,277 (Japanese Patent Application No. 62
No. 77570), 2,6-xylenol was subjected to oxidative coupling polymerization in the presence of dibutylamine. (A-1): Poly-2,6-dimethyl-having an average intrinsic viscosity [η] of 0.38 measured at 30 ° C. in chloroform
1,4-phenylene ether (a-2): poly-2,6-dimethyl- having an average intrinsic viscosity [η] of 0.47 measured in chloroform at 30 ° C.
1,4-phenylene ether (a-3): poly-2,6-dimethyl- having an average intrinsic viscosity [η] of 0.52 measured in chloroform at 30 ° C.
1,4-Phenylene ether (hereinafter abbreviated as PPE) Polystyrene resins used in Examples and Comparative Examples were as follows. (A-4): Styrene content 60% by weight, number average molecular weight 8 × 10 ⁴ , styrene-hydrogenated butadiene block copolymer having a degree of unsaturation of 2% (a-5): Production Example 1 and Production Example 2 Partially hydrogenated conjugated diene rubber modified impact-resistant polystyrene resin (a-6) prepared by the method: containing 9% of polybutadiene having about 98% of cis-1,4 bonds, and having a rubber particle size of 1.5 μm and free polystyrene. A rubber-modified impact-resistant polystyrene resin having a reduced viscosity of 0.53 dl / g measured at 30 ° C. in toluene

[0032]

[Production Example 1] Production of partially hydrogenated conjugated diene rubber (a-5): The partially hydrogenated conjugated diene rubber used in Examples was produced by the method described below. Using a stirrer with an internal volume of 10 liters and a jacketed autoclave as a reactor, a butadiene / n-hexane mixed solution (butadiene concentration 20%) was added to 20
The n-butyllithium / n-hexane solution (concentration 5%) was introduced at a rate of 1 / hr at a rate of 70 ml / hr and the polymerization temperature was 11
Continuous polymerization of butadiene was carried out at 0 ° C. The obtained active polymer was deactivated with methanol, and 8 liters of the polymer solution was transferred to another reactor with a stirrer and a jacket having an internal volume of 10 liters, and at a temperature of 60 ° C., di-p-as a hydrogenation catalyst. Trilyl-bis (1-cyclopentadienyl) titanium /
Cyclohexane solution (concentration 1.2 mmol / l)
250 ml and n-butyllithium solution (concentration 6 mmol / liter) 50 ml were added at 0 ° C. and 2.0 kg / cm ^2.
Add a mixture under hydrogen pressure, hydrogen partial pressure 3.0 kg
/ Cm ² It was made to react for 60 minutes. The resulting partially hydrogenated polymer solution was added with 0.5 part of 2,6-di-t-butylhydroxytoluene per polymer as an antioxidant to remove the solvent. The analytical values of the partially hydrogenated conjugated diene rubber obtained by sampling after deactivation of methanol are shown in Table 1.

[0033]

[Table 1]

[0034]

[Production Example 2] Production of impact-resistant polystyrene resin (a-5): The impact-resistant styrene resin used in the examples was produced by a bulk polymerization method. 10 parts of the partially hydrogenated conjugated diene rubber shown in Table 1 was dissolved in 90 parts of styrene and 8 parts of ethylbenzene, and 0.05 part of benzoyl peroxide and 0.10 part of α-methylstyrene dimer were added to styrene. Then 80
Polymerization was carried out under stirring at 4 ° C. for 4 hours, 110 ° C. for 4 hours, and 150 ° C. for 4 hours. Further, heat treatment was carried out at around 230 ° C. for 30 minutes, and then unreacted styrene and ethylbenzene were removed in vacuum to obtain a high impact polystyrene resin.
The content of partially hydrogenated polybutadiene in the obtained impact-resistant polystyrene-based resin was 11%, and the average particle diameter of partially hydrogenated polybutadiene in the state of containing dispersed polystyrene particles was 1.3 μm. Also, in toluene at 30 ° C
The reduced viscosity was 0.65.

The following compounds were used as the phosphoric acid ester compound and the low molecular weight hydrocarbon resin in Examples and Comparative Examples. (B-1): Bisphenol A-polycresyl phosphate: Chemical formula (III) (mixture of n = 1 to 3)

[0036]

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(B-2): Bisphenol A-polyphenyl phosphate: Chemical formula (IV) (mixture of n = 1 to 3)

[0038]

[Chemical 6]

(B-3): triphenyl phosphate [Dahachi Chemical Co., Ltd .: TPP] (c-1): petroleum resin [Nippon Petrochemical Co., Ltd .: Neopolymer 140]

[0040]

Example 1 PPE having an average intrinsic viscosity [η] of 0.38
Mixing 94.5 parts by weight of (a-1), 5.5 parts by weight of styrene-hydrogenated butadiene block copolymer (a-4) with 12 parts by weight of phosphoric ester (b-1) and 2 parts by weight of styrene monomer. Then, the mixture was melt-kneaded at 300 ° C. in a twin-screw extruder to obtain pellets. Evaluation was performed using this pellet. The results are shown in Table 2.

The physical properties were evaluated by the following methods and conditions using the composition pellets produced by the extruder and the test pieces injection-molded at 300 ° C. Measurement of the average intrinsic viscosity [η] of PPE in the composition: 10 g of pellets were dissolved in 150 ml of cold methylene chloride,
The mixture was left standing at -5 ° C for 24 hours, and the precipitate was filtered. Then, the product was washed with cold methylene chloride and dried under reduced pressure at 140 ° C. for 1 hour to obtain a polymer, and then the intrinsic viscosity was measured.

Melt Flow Rate (abbreviated as MFR):
280 ° C, load 10K based on ASTM D1238
It was measured under the condition of g. Flexural strength, flexural modulus: measured according to ASTM D790. Deflection temperature under load (abbreviated as DTUL): ASTM D6
48, and a load of 18.6 Kg / cm ^{2 was} measured.

Flammability: A 1/8 inch test piece was used and ranked according to the vertical combustion test method specified in UL-94. Amount of smoke generated: The amount of smoke generated from the nozzle of the injection molding machine when purging the resin composition was visually observed.

[0044]

Comparative Example 1 Evaluation was carried out in the same manner as in Example 1 except that (a-1) in Example 1 was replaced with (a-3) having an average intrinsic viscosity [η] of 0.52. The results are shown in Table 2.

[0045]

Example 2 and Comparative Example 2 The components were mixed in the composition shown in Table 3 and melt-kneaded at 300 ° C. in a twin-screw extruder to obtain pellets. Evaluation was performed using this pellet. The results are shown in Table 3. The evaluation of physical properties was performed in the same manner as in Example 1 except for the following items, using composition pellets produced by an extruder and test pieces injection-molded at 260 ° C.

MFR: Measured under the conditions of 250 ° C. and a load of 5 kg. Vicat softening point (abbreviated as VSP): ASTM D152
It measured based on 5.

[0047]

[Examples 3 and 4 and Comparative Examples 3 and 4] The components were mixed in the compositions shown in Table 4 and melt-kneaded at 300 ° C in a twin-screw extruder to obtain pellets. Evaluation was performed using this pellet. The results are shown in Table 4. The evaluation of physical properties was performed in the same manner as in Example 2 except for the following items, using composition pellets produced by an extruder and test pieces injection-molded at 260 ° C.

Moldability: Assuming an electric part as a thin-walled, high-cycle molded product, a simple model cylindrical product of FIG. 1 was continuously molded by injection molding at a cylinder temperature of 260 ° C. for 10,000 shots. To evaluate the volatility of the resin composition, the amount of smoke generated from the nozzle of the injection molding machine when purging the resin composition was visually observed. Further, the appearance of the deposit on the surface of the mold cavity and the appearance of the molded product were evaluated.

[0049]

Example 5, Comparative Example 5 Components were mixed in the composition shown in Table 5 and melt-kneaded at 300 ° C. in a twin-screw extruder to obtain pellets. Evaluation was performed using this pellet. The results are shown in Table 5. The physical properties were evaluated by using the composition pellets produced by the extruder and the test pieces injection-molded at 260 ° C. in Example 2.
I went the same way.

[0050]

[Table 2]

[0051]

[Table 3]

[0052]

[Table 4]

[0053]

[Table 5]

[0054]

EFFECTS OF THE INVENTION The polyphenylene ether resin composition of the present invention has excellent fluidity and molding processability as compared with conventional flame-retardant resin compositions, and has troubles such as poor appearance and cracks during molding. It is possible to provide a halogen-free flame-retardant resin composition.

[Brief description of drawings]

FIG. 1 is a diagram showing a cylindrical molded product model assuming an electric component as a thin-walled, high-cycle molded product used for evaluation of moldability in Examples.

Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location C08L 55/02 LMF 85/02 LSB // (C08L 71/12 57:02)

Claims (7)

[Claims] 1. (A) 100 parts by weight of a polyphenylene ether resin having an average intrinsic viscosity [η] at 30 ° C. of 0.28 to 0.50 in chloroform, (B) a general formula (I), Chemical 1] (Here, Q1, Q2, Q3, and Q4 independently have 1 carbon atom.
Represents an alkyl group from 6 to 6. R1 and R2 are methyl groups,
R3 and R4 independently represent a methyl group or hydrogen. n is 1
Represents the above integers. n1 and n2 each independently represent an integer of 0 to 2. m1, m2, m3, and m4 each independently represent an integer of 0 to 3. ) Phosphoric acid ester compound 0.1
A flame-retardant resin composition consisting of 30 parts by weight. 2. The component (A) is chloroform at 30 ° C.
The flame-retardant resin according to claim 1, comprising 10 to 99 parts by weight of a polyphenylene ether resin having an average intrinsic viscosity [η] of 0.28 to 0.50 and 90 to 1 parts by weight of a polystyrene resin. Composition. 3. The polyphenylene ether resin as the component (A) has an average intrinsic viscosity [η] of 0.28 to 0.46.
The flame-retardant resin composition according to claim 1 or 2. 4. In the general formula (I) representing the phosphoric acid ester compound as the component (B), n1 and n2 are 0, and R3 and R
The flame-retardant resin composition according to claim 1, wherein 4 is a methyl group. 5. In the general formula (I) representing the phosphoric acid ester compound as the component (B), m1, m2, m3 and m4 are
The flame-retardant resin composition according to claim 1, wherein the flame-retardant resin composition is 0. 6. In the general formula (I) representing the phosphoric acid ester compound of the component (B), Q1, Q2, Q3 and Q4 are
The flame-retardant resin composition according to claim 1, which is a methyl group. 7. A low molecular weight hydrocarbon resin as the component (C) is
The flame-retardant resin composition according to claim 1, wherein the flame-retardant resin composition is contained in an amount of ˜15 parts by weight.