JP2007119527A - Particulate polysiloxane compound and flame-retardant resin composition containing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a polysiloxane compound which is substantially free of atoms such as halogens, phosphorus and nitrogen and stably exerts a high flame-retardant effect under a wide range of molding conditions, and a flame-retardant resin composition to which flame retardance is imparted using the same. <P>SOLUTION: The polysiloxane compound has a weight average molecular weight of ≥300,000 and contains at least 85 mol% SiO<SB>4/2</SB>unit. The particulate polysiloxane compound is synthesized into a particle having a volume average particle size of 0.01-5 μm using an emulsifier in an aqueous system at a reaction temperature ranging from 20 to 70°C in the presence of 0.05-1.5 wt.% acid catalyst. The flame-retardant resin composition contains the same. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a novel particulate polysiloxane compound that does not contain atoms such as halogen, phosphorus, nitrogen, etc. and that exhibits high flame retardancy, and a flame retardant resin composition containing the same.

  Flame retardant resin compositions are used in various fields such as the electrical and electronic fields and the building materials field in order to ensure safety against fire. In general, these resin compositions have used halogen compounds such as chlorine and bromine as flame retardants. However, in recent years, with increasing interest in environmental issues mainly in Europe, various phosphorus flame retardants have been studied. Yes. However, when using a phosphoric acid ester compound, red phosphorus, etc., which is a phosphorus flame retardant, odor is generated during extrusion and molding, and there is an adverse effect on mechanical and thermal properties. Therefore, various flame retardants that replace halogen-based compounds and phosphorus-based compounds have been studied.

Silicone compounds are known as flame retardants that do not contain halogen or phosphorus. For example, a non-silicone polymer is flame retardant with a silsesquioxane resin mainly composed of RSiO _3/2 units (for example, see Patent Document 1), R ₃ SiO _1/2 units (M units) and SiO Thermoplastic composition flame retardant with MQ silicone resin and silicone and Group IIA metal salt consisting of _4/2 units (Q units) and having an average ratio of 0.3 to 4 units M units per unit (e.g. Patent Document 2) is disclosed. Also disclosed is a resin composition in which a non-silicone resin containing an aromatic ring is flame-retarded with a silicone resin having RSiO _3/2 units (T units) and R ₂ SiO _2/2 units (D units) ( For example, see Patent Document 3). It is disclosed that the silicone resin disclosed in Patent Document 3 exhibits a large flame retardant improvement effect on polycarbonate. Furthermore, it is disclosed that DQ silicone having a specific molecular weight composed of R ₂ SiO _2/2 units having an aromatic ring and SiO _4/2 units (see, for example, Patent Document 4) also improves flame retardancy of polycarbonate and the like. .

However, these silicone-based flame retardants have a problem that they have a large flame retardant effect only on specific resins such as polycarbonate, and the flame retardant properties greatly vary depending on molding conditions.
JP 54-36365 A Japanese Patent Publication No. 3-48947 Japanese Patent Laid-Open No. 10-139964 JP 2001-316671 A

  The present invention relates to a particulate polysiloxane compound that does not substantially contain atoms such as halogen, phosphorus, nitrogen, etc., and that can stably exhibit a high flame retardancy effect under a wide range of molding conditions, and a flame retardant resin containing the same The object is to provide a composition.

  As a result of intensive studies on the above problems, the present inventors can obtain a highly flame-retardant resin composition using a specific polysiloxane compound synthesized in a particulate form under specific conditions. As a result, the present invention has been completed.

That is, the first of the present invention is a polysiloxane compound having a weight average molecular weight of 300,000 or more and containing at least 85 mol% of SiO _4/2 units, having a reaction temperature of 20 to 70 ° C., an acid catalyst amount of 0 The present invention relates to a particulate polysiloxane compound characterized by being synthesized into particles having a volume average particle diameter of 0.01 to 5 μm using an emulsifier in an aqueous system under the condition of 0.05 to 1.5% by weight.

  A second aspect of the present invention relates to a flame retardant resin composition comprising the polysiloxane compound and a resin.

  A preferred embodiment relates to the flame retardant resin composition described above, which contains 0.1 to 50 parts by weight of a polysiloxane compound with respect to 100 parts by weight of the resin.

  In a preferred embodiment, the resin is an aromatic polycarbonate resin, aromatic polyester resin, polyphenylene ether resin, aromatic vinyl resin, polyphenylene sulfide resin, N-aromatic substituted maleimide resin, polyimide resin, The flame retardant resin composition according to any one of the above, wherein the flame retardant resin composition is at least one selected from the group consisting of at least two of these polymer alloys.

The particulate polysiloxane compound of the present invention having a specific particle diameter and a weight average molecular weight and having a SiO _4/2 unit of 85 mol% or more is synthesized under a wide range of molding conditions. The resin can stably impart high flame retardancy.

The present invention is a polysiloxane compound having a weight average molecular weight of 300,000 or more and containing at least 85 mol% of SiO _4/2 units, a reaction temperature of 20 to 70 ° C., an acid catalyst amount of 0.05 to 1. A flame retardant resin composition that is highly flame retardant using a particulate polysiloxane compound that is synthesized into particles having a volume average particle size of 0.01 to 5 μm using an emulsifier in an aqueous system under the condition of 5% by weight. It provides things.

The polysiloxane compound of the present invention contains at least 85 mol% or more of SiO _4/2 units as its constituent units, and other constituent units include R ₃ SiO _1/2 units, R ₂ SiO _2/2. A unit, and a R ₁ SiO _3/2 unit (wherein R represents an organic group capable of bonding to Si, and when there are a plurality of R, they may be the same or different) One or more units may be contained in a total of 15 mol% or less. The SiO _4/2 unit in the polysiloxane compound is preferably 90 mol% or more, more preferably 95 mol% or more, and the upper limit is 100 mol%. If the SiO _4/2 unit in the polysiloxane compound is less than 85 mol%, the final molded product obtained from the resin composition containing the polysiloxane compound of the present invention may not be sufficiently flame retardant. In addition, the R ₃ SiO _1/2 unit, R ₂ SiO _2/2 unit, or R ₁ SiO _3/2 unit contained in the polysiloxane compound is 10 mol% or less in total, and further 5 mol% or less. Preferably, the lower limit is 0 mol%.

  The polysiloxane compound of the present invention is synthesized into particles having a volume average particle diameter of 0.01 to 5 μm under specific conditions by using an emulsifier in an aqueous system.

In the present invention, for example, water at 20 to 70 ° C. containing an acid catalyst is added to an emulsifier, SiO _4/2 units, and R ₃ SiO _1/2 units, R ₂ SiO _2/2 units or R ₁ SiO _{3 as} required. _A particulate polysiloxane compound can be obtained by continuously adding an emulsion obtained by emulsifying a mixture of a raw material of ₂ units and water with a line mixer or a homogenizer. In order to stabilize the polysiloxane compound, a small amount of a seed polymer having a small particle diameter may be added to the mixed solution of the acid catalyst and water in the synthesis of the polysiloxane compound in the aqueous system.

The raw material of the SiO _4/2 unit can be selected from the group consisting of silicon tetrachloride, tetraalkoxysilane, water glass and metal silicate, for example. Specific examples of the tetraalkoxysilane include tetramethoxysilane, tetraethoxysilane, tetrapropoxysilane, and condensates thereof.

As a raw material of the R ₂ SiO _2/2 unit, R ₂ SiX ₂ (wherein, R represents the same group as described above. X may be the same or different, and may be a halogen, a hydroxyl group, or a hydroxyl group; Represents a dehydration condensate), or an organosiloxane having a linear, branched or cyclic structure. R in the R ₂ SiO _2/2 unit is preferably composed of an alkyl group having 1 to 4 carbon atoms and an aromatic group having 6 to 24 carbon atoms. Specific examples of the raw material include dimethyldimethoxysilane, diphenyldimethoxysilane, Hexamethylcyclotrisiloxane (D3) such as methylphenyldimethoxysilane, dimethyldiethoxysilane, diphenyldiethoxysilane, methylphenyldiethoxysilane, diethyldimethoxysilane, ethylphenyldimethoxysilane, diethyldiethoxysilane, ethylphenyldiethoxysilane In addition to cyclic compounds such as octamethylcyclotetrasiloxane (D4), decamethylcyclopentasiloxane (D5), dodecamethylcyclohexasiloxane (D6), and trimethyltriphenylcyclotrisiloxane, , And the like Jo or branched organosiloxane.

R in the RSiO _3/2 unit is preferably composed of an alkyl group having 1 to 4 carbon atoms and an aromatic group having 6 to 24 carbon atoms. Examples of raw materials include methyltrimethoxysilane, methyltriethoxysilane, Examples thereof include methyltripropoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, ethyltripropoxysilane, phenyltrimethoxysilane, phenyltriethoxysilane, and phenyltripropoxysilane.

In the present invention, R in the R ₃ SiO _1/2 unit is preferably composed of an alkyl group having 1 to 4 carbon atoms and an aromatic group having 6 to 24 carbon atoms. Examples thereof include siloxane.

  As the emulsifier in the present invention, an anionic emulsifier and a nonionic emulsifier can be suitably used. Specific examples of the anionic emulsifier include sodium alkylbenzene sulfonate, sodium lauryl sulfonate, potassium oleate and the like, and sodium dodecylbenzene sulfonate is particularly preferably used. Specific examples of nonionic emulsifiers include polyoxyethylene nonylphenyl ether and polyoxyethylene lauryl ether.

Examples of the acid catalyst that can be used in the present invention include sulfonic acids such as aliphatic sulfonic acid, aliphatic substituted benzenesulfonic acid, and aliphatic substituted naphthalenesulfonic acid, and mineral acids such as sulfuric acid, hydrochloric acid, and nitric acid. Of these, aliphatic substituted benzenesulfonic acid is preferred, and n-dodecylbenzenesulfonic acid is particularly preferred from the viewpoint of excellent siloxane emulsion stability. The amount of the acid catalyst is selected from SiO _4/2 units constituting the polysiloxane compound of the present invention, and R ₃ SiO _1/2 units, R ₂ SiO _2/2 units, and R ₁ SiO _3/2 units. It is necessary to use in the range of 0.05 to 1.5% by weight, preferably 0.1 to 0.75% by weight, based on the total weight of the siloxane raw material having units and the weight of the acid catalyst. It is a range. If the amount of the acid catalyst is less than 0.05% by weight, the condensation reaction may not proceed and polysiloxane may not be obtained. On the other hand, if the amount of the acid catalyst exceeds 1.5% by weight, the final molded body obtained from the resin composition containing the polysiloxane compound may not have sufficient flame retardancy.

  The reaction temperature for the synthesis of the polysiloxane compound of the present invention needs to be 20 to 70 ° C., and more preferably 40 to 60 ° C. When the reaction temperature is lower than 20 ° C., the reaction time becomes longer, and thus the productivity tends to decrease. Conversely, if the reaction temperature exceeds 70 ° C., the flame retardancy of the final molded product obtained from the resin composition containing the polysiloxane compound may not be sufficient.

  In the synthesis of the polysiloxane compound of the present invention, the seed polymer that can be added to the emulsion can be obtained by ordinary emulsion polymerization, but the synthesis method is not particularly limited. The seed polymer may be, for example, a rubber component such as butyl acrylate rubber or butadiene rubber, butyl acrylate-styrene copolymer, butyl acrylate-butadiene copolymer, butyl acrylate-acrylonitrile copolymer, A hard polymer such as butyl acrylate-styrene-acrylonitrile copolymer or styrene-acrylonitrile copolymer may be used. Among these, from the viewpoint of narrowing the particle size distribution of the polysiloxane compound of the present invention, it is preferable to use a seed polymer having a low molecular weight and a small particle size. The particle size of the seed polymer can be appropriately set according to the final particle size of interest, but it is usually preferable to set the volume average particle size in the range of 0.01 to 0.1 μm.

  Although the polysiloxane compound of the present invention is synthesized in the form of particles, the volume average particle diameter is preferably in the range of 0.01 to 5 μm from the viewpoint of flame retardancy of the final molded body, Is more preferably in the range of 0.05 to 2 μm. The volume average particle diameter can be measured, for example, by using a MICROTRAC UPA manufactured by LEED & NORTHRUP INSTRUMENTS. In addition, about the said particulate form, there is no restriction | limiting in particular as long as the polysiloxane compound obtained is a particle state, It does not necessarily need to be a perfect sphere.

  The weight average molecular weight of the polysiloxane compound obtained by the present invention is set from 300,000 or more to an infinite range that is not soluble in a solvent, from the viewpoint of expressing stable flame retardancy that is not affected by molding conditions. Is preferred. In addition, the weight average molecular weight of the polysiloxane compound of this invention in the case of melt | dissolving in a solvent can be measured using a gel permeation chromatography (GPC), for example.

  There is no particular limitation on the method for separating the final polysiloxane compound from the latex-like polysiloxane compound obtained by the present invention as a powdered polysiloxane compound. For example, a metal salt such as calcium chloride, magnesium chloride or magnesium sulfate is added to the latex. Examples of the method include coagulating the latex and neutralizing with an aqueous NaOH solution, followed by dehydration, washing with water, and drying. A spray drying method can also be used. Furthermore, if necessary, the polysiloxane compound can be washed with an organic solvent such as methanol.

  The desired purpose can be achieved by adding 0.1 to 50 parts by weight of the polysiloxane compound of the present invention with respect to 100 parts by weight of the resin. If the addition amount of the polysiloxane compound is less than 0.1 parts by weight, the effect of improving the flame retardancy may not be obtained. Conversely, if it exceeds 50 parts by weight, the surface properties, moldability, etc. tend to deteriorate. . The addition amount of the polysiloxane compound of the present invention is preferably 0.3 to 30 parts by weight, more preferably 0.5 to 20 parts by weight. Therefore, for example, even if it is used in a very small amount of 10 parts by weight or less, it is possible to exert a flame retardant effect. In addition, by using the polysiloxane compound according to the present invention in combination with other known various flame retardants, a higher level of flame retardancy can be obtained. In addition, it is possible to obtain a flame retardant composition even with a smaller addition amount.

  It does not specifically limit as resin used with the flame-retardant resin composition of this invention, The various high molecular compound which can mix a flame retardant can be used. The resin may be a thermoplastic resin or a thermosetting resin, or may be a synthetic resin or a resin existing in nature.

  Among the resins, it is preferable to use an aromatic resin as the resin because it is easy to make it flame-retardant using the polysiloxane compound of the present invention. An aromatic resin refers to a resin having at least one aromatic ring in the molecule. Among aromatic resins, aromatic polycarbonate resins, aromatic polyester resins, polyphenylene ether resins, aromatic vinyl resins, polyphenylene sulfide resins, N-aromatic substituted maleimide resins, polyimide resins, and It is preferable to use at least one selected from the group consisting of at least two of these polymer alloys. These resins may be used alone, or may be used as an alloy with various other resins.

  In the flame-retardant resin composition of the present invention, a fluorine-containing resin, a silicon-containing polymer other than the polysiloxane compound used in the present invention, and the like can be used to further increase the flame retardancy.

  A fluororesin is a resin having a fluorine atom in the resin. Specific examples include polymonofluoroethylene, polydifluoroethylene, polytrifluoroethylene, polytetrafluoroethylene, and tetrafluoroethylene / hexafluoropropylene copolymer. Further, if necessary, the monomer used for the production of the fluororesin may be copolymerized with another copolymerizable monomer as long as the physical properties such as flame retardancy of the obtained molded product are not impaired. The obtained copolymer may be used. These fluororesins can be used alone or in combination of two or more. The weight average molecular weight of the fluororesin is preferably 1 million to 20 million, more preferably 2 million to 10 million. With respect to the production method of these fluororesins, generally known methods such as emulsion polymerization, suspension polymerization, bulk polymerization, and solution polymerization can be used.

  Silicon-containing polymers other than the polysiloxane compound used in the present invention include diorganosiloxane compounds such as dimethylsiloxane and phenylmethylsiloxane, and organosylhemioxy such as trimethylsilhemioxane and triphenylsylhemioxane. Sun compounds, and copolymers obtained by polymerizing these, polydimethylsiloxane, polyphenylmethylsiloxane, polysilane, polycarbosilane, polysilazane, silicon-boron copolymer, silicon-metal copolymer, and the like. . A modified silicon polymer in which a part of the molecule is substituted with an epoxy group, a hydroxyl group, a carboxyl group, a mercapto group, an amino group, an ether, or the like can also be used.

  The addition amount of the fluororesin and the silicon-containing polymer is not limited as long as other properties (chemical resistance, heat resistance, etc.) are not impaired, but 0.01 to 10 parts by weight with respect to 100 parts by weight of the resin. Preferably, it is 0.03-8 weight part, More preferably, it is 0.05-6 weight part. If the addition amount is less than 0.01 parts by weight, the effect of improving the flame retardancy is reduced, and if it exceeds 10 parts by weight, the moldability may be lowered.

  Moreover, in order to make the flame retardant resin composition of the present invention have higher performance, it is possible to use one or more kinds of heat stabilizers such as a phenol stabilizer, a thioether stabilizer, and a phosphorus stabilizer in combination. preferable. Further, as required, usually well-known lubricants, mold release agents, plasticizers, flame retardants, flame retardant aids, ultraviolet absorbers, light stabilizers, pigments, dyes, antistatic agents, conductivity imparting agents, One or more additives such as a dispersant, a compatibilizing agent and an antibacterial agent can be used in combination. However, it is not preferable to use such additives as those that promote the decomposition or reaction of the polysiloxane compound because the flame retardancy of the resulting composition is lowered.

  Furthermore, the flame retardant resin composition of the present invention may be used as a reinforcing material by combining a reinforcing filler within a range not impairing the characteristics (flame retardancy, etc.) of the present invention. That is, by adding a reinforcing filler, it is possible to further improve the heat resistance and mechanical strength. Such a reinforcing filler is not particularly limited, and examples thereof include fibrous fillers such as glass fiber, carbon fiber, and potassium titanate fiber; glass beads, glass flakes; talc, mica, kaolin, wollastonite, smectite, Silicate compounds such as diatomaceous earth; calcium carbonate, calcium sulfate, barium sulfate and the like. Of these, silicate compounds and fibrous fillers are preferred.

  It does not specifically limit as a method for manufacturing the flame-retardant resin composition of this invention. For example, it can be produced by a method of drying the components as described above, if necessary, followed by melt kneading in a melt kneader such as a single screw or twin screw extruder. Moreover, when a compounding agent is a liquid, it can also add and manufacture in the middle of a twin-screw extruder using a liquid supply pump etc.

  The method for molding the flame-retardant resin composition of the present invention is not particularly limited, and commonly used molding methods such as injection molding, blow molding, extrusion molding, vacuum molding, press molding, calendar molding, and foam molding. Etc. can be used.

  The flame retardant resin composition of the present invention can be suitably used for various applications. Preferred applications include injection molded products such as home appliances, OA equipment parts, automobile parts, blow molded products, extrusion molded products, foam molded products, and the like.

  The present invention will be specifically described based on examples, but the present invention is not limited thereto. Measurements and tests in the following examples and comparative examples were performed as follows.

[Volume average particle diameter]
The volume average particle diameter of the seed polymer and polysiloxane particles was measured in a latex state. The volume average particle diameter (μm) was measured by a light scattering method using a MICROTRAC UPA manufactured by LEED & NORTHRUUP INSTRUMENTS as a measuring device.

[Weight average molecular weight of polysiloxane compound]
The weight average molecular weight of the polysiloxane compound was converted from the GPC measurement data using a calibration curve created with a polystyrene standard sample.

[Flame retardance]
Evaluation was performed according to the UL94 V test using a 1/16 inch bar.

(Examples 1-4 and Comparative Examples 1-3)
In a 5-neck flask equipped with a stirrer, reflux condenser, nitrogen inlet, monomer addition port, thermometer, 400 parts by weight of water (total amount of water including various dilution water) and sodium dodecylbenzenesulfonate (SDBS) ) After 8 parts by weight (solid content) were taken and mixed, the temperature was raised to 50 ° C., and after the liquid temperature reached 50 ° C., nitrogen substitution was performed. Thereafter, a mixed solution of 10 parts by weight of butyl acrylate, 3 parts by weight of t-dodecyl mercaptan, and 0.01 parts by weight of paramentane hydroperoxide was added. After 30 minutes, add 0.002 part by weight of ferrous sulfate (FeSO ₄ · 7H ₂ O), 0.005 part by weight of ethylenediaminetetraacetic acid · 2Na salt, and 0.2 part by weight of sodium formaldehydesulfoxylate. The polymerization was further continued for 1 hour. Thereafter, a mixed solution of 90 parts by weight of butyl acrylate, 27 parts by weight of t-dodecyl mercaptan, and 0.1 parts by weight of paramentane hydroperoxide was continuously added over 3 hours. Post-polymerization was performed for 2 hours to obtain a seed latex (seed 1). The latex had a volume average particle size of 0.04 μm.

  In a 5-neck flask equipped with a stirrer, reflux condenser, nitrogen inlet, monomer addition port, and thermometer, 500 parts by weight of water (total amount of water including various dilution water) and seed latex (seed 1) After mixing 2 parts by weight (solid content) and dodecylbenzenesulfonic acid (DBSA) in the amount (solid content) shown in Table 1, the temperature was raised to the temperature shown in Table 1 and nitrogen substitution was performed. Subsequently, a table of 100 parts by weight of pure water, SDBS (solid content), tetraethoxysilane (TEOS), octamethylcyclotetrasiloxane (D4), and ethyl silicate 40 (equivalent to tetraethoxysilane pentamer) manufactured by Tama Chemical Industry. The emulsion obtained by stirring the mixture of the amount shown in 1 with a homogenizer at 7000 rpm for 5 minutes was continuously added over 3 hours. After completion of the addition, stirring was continued for 2 hours, followed by cooling to 25 ° C. and leaving for 20 hours to obtain a latex-like polysiloxane compound. The volume average particle diameter and weight average molecular weight of the polysiloxane compound particles are shown in Table 1. In addition, about the wide thing which particle diameter has clearly several distribution, it gave the width | variety and described.

  Subsequently, the latex polysiloxane compound was diluted with pure water to make the solid content concentration about 5% by weight, and then 5 parts by weight (solid content) of 25% by weight calcium chloride aqueous solution was added to obtain a coagulated slurry. . The coagulated slurry was neutralized to pH = 7 with 2.5 wt% NaOH aqueous solution. The coagulated slurry was dehydrated, mixed and stirred with 10 times the amount of methanol, and then dried again to obtain a polysiloxane compound powder.

  Next, the composition shown in Table 1 was blended using a polycarbonate resin (Taflon FN1900A manufactured by Idemitsu Petrochemical Co., Ltd.) and a powder of the polysiloxane compound. In addition, 0.3 part by weight of polytetrafluoroethylene (polyflon FA-500 manufactured by Daikin Industries, Ltd.) is used as an anti-dripping agent, and 0.3 part by weight of a phosphorous antioxidant (Adeka Stub PEP36 manufactured by Asahi Denka Co., Ltd.) And 0.3 parts by weight of a phenol-based stabilizer (Topanol CA manufactured by ICI Japan) were used.

  The obtained blend was melt-kneaded at 270 ° C. with a twin-screw extruder (TEX44SS manufactured by Nippon Steel) to produce pellets. A 1 / 16-inch test piece for flame retardancy evaluation was prepared using a FAS100B injection molding machine manufactured by FANUC Co., Ltd. in which the obtained pellet was set to a cylinder temperature of 280 ° C. It evaluated according to the said evaluation method using the obtained test piece. Table 1 shows the results of flame retardancy of the molded product.

(Comparative Example 4)
The blending, molding and evaluation were performed in the same manner as in Example 1 except that the polysiloxane compound powder was not added in blending with the polycarbonate resin, and the results are shown in Table 1.

A polysiloxane compound of the present invention having a specific particle size and weight average molecular weight and having a SiO _4/2 unit of 85 mol% or more, which is synthesized in an aqueous system using an emulsifier, is high in resin. Flame retardancy can be imparted.

Claims (4)

A polysiloxane compound having a weight average molecular weight of 300,000 or more and containing at least 85 mol% of SiO _4/2 units, having a reaction temperature of 20 to 70 ° C. and an acid catalyst amount of 0.05 to 1.5 wt% A particulate polysiloxane compound characterized by being synthesized into particles having a volume average particle diameter of 0.01 to 5 μm using an emulsifier in an aqueous system depending on conditions.   A flame retardant resin composition comprising the polysiloxane compound according to claim 1 and a resin.   The flame-retardant resin composition according to claim 2, comprising 0.1 to 50 parts by weight of a polysiloxane compound with respect to 100 parts by weight of the resin.   The resin is an aromatic polycarbonate resin, aromatic polyester resin, polyphenylene ether resin, aromatic vinyl resin, polyphenylene sulfide resin, N-aromatic substituted maleimide resin, polyimide resin, and among these The flame-retardant resin composition according to claim 2 or 3, wherein the flame-retardant resin composition is at least one selected from the group consisting of at least two polymer alloys.