JP2010024362A - Resin composition and electric insulating part using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin composition imparted with flame retardancy by non-halogen flame retardant, producing a molded article excellent in flame retardancy and electrical safety. <P>SOLUTION: The resin composition is obtained by compounding (A) 100 pts.wt of a resin component comprising (A-1) 40-100 wt.% of a polyalkylene terephthalate resin, (A-2) 0-50 wt.% of a polystyrene resin, and (A-3) 0-10 wt.% of a compatibilizing agent; (B) 40-100 pts.wt of a flame retardant comprising (B-1) 10-50 wt.% of a cyanophenoxy group-containing phosphazene flame retardant, (B-2) 20-70 pts.wt of a nitrogen-based flame retardant consisting of a salt of an amino group-containing triazine, (B-3) 0-20 pts.wt of a metal salt of a boric acid; and (C) 0-200 pts.wt of an inorganic filler, wherein polyphenylene ether resin, polyphenylene sulfide resin, and phenol resin (excluding those used as the compatibilizing agents) are not contained or, if any, contained in the amount of not more than 1 wt.%. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a resin composition that gives a molded article excellent in flame retardancy and electrical safety. Specifically, by making a polyalkylene terephthalate resin or a resin component obtained by further blending a polystyrene resin or a compatibilizer thereof with a non-halogen flame retardant such as phosphorus and nitrogen, The present invention relates to a resin composition imparted with a characteristic of being excellent in glow wire characteristics in addition to flame retardancy and tracking resistance.

This resin composition has a small shrinkage anisotropy at the time of molding, and further generates less gas. The present invention also relates to an electrically insulating part formed using this resin composition, in which a flame retardant does not bleed out even at high temperatures. This electrical insulation component has the advantage of not causing corrosion of electrical contacts because it generates less gas.

As an insulating material between electrical conductors, plastic materials are widely used as electrical and electronic parts. Polyalkylene terephthalate resins are widely used in this field because they have excellent insulating performance, heat resistance, moldability, and recyclability.

In recent years, demands for electrical safety in electrical and electronic parts are becoming stricter than ever before. For example, according to the recently revised IEC 60335-1 standard of the International Electrotechnical Commission (abbreviated as IEC), in household electrical products such as refrigerators and fully automatic washing machines, equipment that operates without an operator attached. Among the parts, electrical insulation parts that support connections through which current exceeding 0.2 A flows during normal operation, and electrical insulation parts that are within a distance of 3 mm from these connections (printed circuit boards, terminal blocks) , Plugs, etc.) have a glowing rod burning index (Glow-wire Flammability Index, abbreviated as GWFI) of 1.5 mm thickness and 850 ° C. or higher, and a glowing rod ignition temperature (Glow-wire Ignition Temperature, Referred: GWIT) is satisfied monkey it is required to be at 775 ° C. or more 0.8~3mm thickness. More desirably, GWFI satisfies 960 ° C. or higher, and GWIT satisfies 0.8 to 3 mm thickness and 800 ° C. or higher. In this specification, GWFI and GWIT are collectively referred to as glow wire property.

Of course, these components are already required for similar electrical and electronic components, such as Underwriters Laboratories Inc., UL-94 flame retardancy and tracking index (Comparative Tracking Index), Requirements such as CTI) or Proof Tracking Index (PTI) must be satisfied at the same time. That is, it is necessary to satisfy flame retardancy of V-2 or more at a thickness of 0.8 mm and 550 V or more in PTI (or CTI). Preferably, the flame retardancy is V-0 and the PTI (or CTI) is required to be 600V or higher.

In this way, electrical and electronic parts have strict regulations regarding resistance to ignition and flame propagation, that is, glow wire properties, in addition to flame resistance and tracking resistance. Parts that satisfy a good balance are required. In addition, when a molded product is manufactured or when the molded product is used in a high temperature atmosphere, bleeding (bleeding out) of the surface of the molded product such as a flame retardant may cause corrosion of the electrical conductor. The occurrence of out must be suppressed. Furthermore, in precision molded products such as connectors, a material having a small shrinkage anisotropy at the time of molding is required in order to reduce mold manufacturing costs.

By the way, polyalkylene terephthalate resin, especially polybutylene terephthalate resin (hereinafter sometimes abbreviated as PBT resin) and polyethylene terephthalate resin (hereinafter sometimes abbreviated as PET resin) are mechanical properties. Due to its excellent electrical properties and heat resistance, it has recently been used in many applications such as electrical equipment parts and machine parts. In particular, since excellent flame retardancy can be easily obtained and at the same time excellent mechanical properties, it is also expected as an insulating material for parts of electric and electronic equipment that operate without the above-mentioned operator. I came.

It is well known that when a halogen-based flame retardant is blended with a polyalkylene terephthalate resin such as a PBT resin, V-0, which is the highest evaluation in the UL-94 standard, can be reached. However, characteristics such as tracking characteristics and glow wire characteristics are completely different from the flame retardancy of UL-94 standard known as flame retardancy evaluation (hereinafter simply referred to as “flame retardancy”). It is an index that is evaluated in different ways. While the flame retardancy of UL-94 indicates “incombustibility” when a burner flame is brought into contact, GWFI and GWIT are glow wires as defined in the revised IEC 60335-1 standard. It is an index indicating the ignitability at a high temperature due to, and is a completely different property.

Moreover, even V-0, which is the highest evaluation in the UL-94 standard, may have insufficient tracking and glow wire properties, and conversely, V-2, which has lower flame retardancy than V-0. However, since the tracking property and the glow wire property may be exhibited, the tracking property and the glow wire property cannot be predicted from the evaluation of the flame retardancy of UL-94.

Patent Documents 1 and 2 disclose a polyester resin composition excellent in glow wire properties using a halogen-based flame retardant, and it is shown that GWFI and GWIT pass the above standards at a thickness of 3 mm. However, this resin composition does not pass GWIT, particularly at a thickness of 1.5 mm or less. In recent years, molded products using such halogen-based flame retardants have an adverse effect on the environment if they are incinerated after use, so electrical insulation parts using resin compositions that do not use halogen-based flame retardants. Is required.

As non-halogen flame retardants for polyester resins, phosphazene compounds (sometimes referred to as phosphonitrile compounds) have been known for a long time (see, for example, Patent Documents 3 to 8). For example, Patent Document 4 describes, “(A) 0.5 to 100 parts by weight of a phosphonitrile linear polymer and / or cyclic polymer and (C) a triazine compound and cyanuric acid or 100 parts by weight of a thermoplastic resin. A flame retardant resin composition "containing 0.5 to 100 parts by weight of a salt made of isocyanuric acid" is disclosed.

And in an Example, when the said 2 types of flame retardant is mix | blended with PBT resin, it is shown that the outstanding flame retardance called V-0 is reachable. However, as other physical properties, only mechanical properties and hydrolysis resistance are shown, and there is no disclosure of the tracking property and the glow wire property. Moreover, the compounding quantity of the phosphazene compound and cyanuric acid melamine with respect to PBT resin is the range of 11.0-17.4 weight% and 8-12 weight%, respectively, and the compounding ratio is phosphazene / melamine cyanurate = 1.17-. The range is 1.96, and phosphazene compounds are considerably more common.

Furthermore, Patent Document 5 describes blending a phosphazene compound and a polyphenylene oxide resin as a flame retardant into a polyalkylene terephthalate resin. Moreover, blending a polystyrene resin or a nitrogen-based flame retardant as a further flame retardant is also described. However, in Patent Document 5, when a phosphazene compound and a polyphenylene oxide resin are combined to form a flame retardant, the polyalkylene terephthalate resin can be made highly flame retardant, the flame retardant bleeds out from the molded product, and the metal corrosiveness. In addition, it is only described that the moldability at the time of injection molding (mold deposit) can be significantly improved, and there is no description about the tracking property and the glow wire property as in Patent Document 4 described above. Moreover, the compounding quantity ratio of the phosphazene compound and nitrogen-containing compound (melamine cyanurate etc.) in an Example is 1.47-10, and there are considerably more phosphazene compounds.

Patent Document 6 describes blending a phosphazene compound and a phenol resin as a flame retardant into a resin component composed of a polyalkylene terephthalate resin and a polystyrene resin. And that

The paragraph describes that the presence of a phenolic resin suppresses a decrease in the molecular weight and mechanical properties of the polyalkylene terephthalate resin and can make the polyalkylene terephthalate resin highly flame-retardant compared to the case of using a phosphazene compound alone. ing. Further, it is also described that a carbonized resin or a nitrogen-based flame retardant is added as a further flame retardant. However, Patent Document 6 describes only the evaluation of flame retardancy, flame retardant bleeding (bleed out), mechanical strength, and kneadability, and does not include glow wire properties.

Patent Document 7 describes a flame retardant resin composition obtained by blending a phosphazene compound or melamine cyanurate with a resin component comprising a polyester resin and a polyphenylene ether resin and / or a polyphenylene sulfide resin. However, the physical properties of this resin composition are flame retardancy, hydrolysis resistance, plate-out (a phenomenon in which gas components adhere to the mold during molding, and plate-out is a problem of compatibility between the additive and the resin. Only evaluation results are shown, and there is no description of glow wire properties.

As described above, a number of flame retardant resin compositions in which a phosphazene compound and another flame retardant are blended as a flame retardant with a polyalkylene terephthalate resin have been proposed, but there is no information regarding their glow wire properties. Further, according to the knowledge of the present inventors, when a polyphenylene ether resin or a phenol resin is blended with a polyalkylene terephthalate resin as in Patent Documents 5 to 7, tracking characteristics are drastically lowered.

JP 2005-232410 A JP 2006-45544 A Japanese Patent Laid-Open No. 51-36266 JP 7-216235 A JP 2003-82211 A JP 2003-82210 A JP-A-10-77396 JP 2002-114981 A

The object of the present invention is flame-retarded with a non-halogen flame retardant, particularly satisfies the electrical safety such as glow wire property and tracking property of the revised IEC 60335-1 standard, and suppresses the bleed out of the flame retardant. Another object of the present invention is to provide a flame retardant resin composition that gives a molded product. Another object of the present invention is to provide a resin composition that is substantially free of any of a polyphenylene ether resin, a polyphenylene sulfide resin, and a phenolic resin, which is used in combination when a phosphazene compound is used as a flame retardant in the above patent document. It is to provide. Yet another object is to provide a resin composition having a small shrinkage anisotropy during molding in addition to the above. Another object of the present invention is to provide a contacted electrical / electronic component using the resin composition.

As a result of intensive studies to solve the above problems, the inventors of the present invention contain a cyanophenyl group in a polyalkylene terephthalate resin or a resin component obtained by further blending a polystyrene resin and a compatibilizer thereof. A resin composition obtained by blending a specific amount of a phosphazene flame retardant and a nitrogen flame retardant, and a resin composition obtained by blending a metal borate with this, surprisingly, GWIT, GWFI, It has been found that an electrical insulation component that satisfies the required characteristics of strict standards related to electrical appliances such as PTI (revised IEC 60335-1 standard) and that suppresses the bleed-out of flame retardant is provided. In particular, the combined use of polystyrene resin gives a molded article having a small shrinkage anisotropy during molding.

The present invention has been achieved based on the above findings, and the gist thereof is (A-1) 40-100 parts by weight of a polyalkylene terephthalate resin, (A-2) 0-50 parts by weight of a polystyrene-based resin, and (A-3) (B-1) 10-50 parts by weight of a cyanophenoxy group-containing phosphazene flame retardant with respect to 100 parts by weight of the resin component (A) comprising 0-10 parts by weight of a compatibilizer, (B-2) 20-70 parts by weight of a nitrogen-based flame retardant composed of a salt of an amino group-containing triazine, (B-3) a flame retardant composed of 0-20 parts by weight of a metal borate (B), 40-100 parts by weight, and (C) inorganic A polyphenylene ether resin, a polyphenylene sulfide resin, and a phenolic resin (provided that the epoxy group-containing novolak epoxy resin acts as a compatibilizing agent) and contains 0 to 200 parts by weight of a filler. Except. One or not also contained in), it consists in the resin composition, characterized in that both also contain less than 1 wt% maximum.

Another aspect of the present invention has a molded part formed using this resin composition, and the molded part directly supports a connection part through which a rated current exceeding 0.2 A flows, Or it exists in the electrical insulation component characterized by forming the part in the distance within 3 mm from these connection parts.

The resin composition of the present invention has the following excellent effects.
(1) To provide a molded product that has good flame retardancy, tracking properties, and glow wire properties, satisfies the revised IEC 60335-1 standard, and at the same time, suppresses bleed out of the flame retardant.
(2) Since the shrinkage anisotropy during molding is small, the mold design is easy.
(3) Since the generation of gas from the resin molded body in the usage environment is small, corrosion of the contact is suppressed when used for an electrical component having a contact.
(4) Electrically-insulated parts that are parts of equipment that operate without an operator, and that have a current exceeding 0.2 A flowing during normal operation, that is, that support a connecting part with a rated current exceeding 0.2 A , And these connection parts can be used as an electrical insulation component within a distance of 3 mm.

The present invention is described in detail below.
The (A) resin component of the present invention comprises (A-1) a polyalkylene terephthalate resin, (A-2) a polystyrene-based resin, and (A-3) a compatibilizing agent.

(A-1) Polyalkylene terephthalate resin With polyalkylene terephthalate resin, terephthalic acid accounts for 50 mol% or more of the total dicarboxylic acid component, and ethylene glycol or 1,4-butanediol is 50% by weight of the total diol. It refers to a resin that occupies at least%. The terephthalic acid preferably accounts for 80 mol% or more of the total dicarboxylic acid component, and more preferably 95 mol% or more. More preferably, ethylene glycol or 1,4-butanediol accounts for 80 mol% or more of the total diol component, and more preferably 95 mol% or more. In the present invention, as the polyalkylene terephthalate resin, terephthalic acid accounts for 95 mol%, particularly 98 mol% or more of the total dicarboxylic acid component, and ethylene glycol or 1,4-butanediol is 95 wt% or more of the total diol. It is preferable to use polyethylene terephthalate, polybutylene terephthalate, or a mixture thereof.

The intrinsic viscosity of the polyalkylene terephthalate resin is 0.50 or more when measured at a temperature of 30 ° C. using a mixed solvent of 1,1,2,2-tetrachloroethane / phenol = 1/1 (weight ratio), preferably Is 0.6 or more and 3.0 or less, preferably 1.5 or less. If the intrinsic viscosity is less than 0.50, the mechanical strength is low. Conversely, if the intrinsic viscosity is more than 3.0, the moldability of the resin composition is significantly deteriorated. In addition, as polyalkylene terephthalate resin, you may use together 2 or more types of polyalkylene terephthalate resin from which intrinsic viscosity differs.

Examples of dicarboxylic acid components other than terephthalic acid constituting the polyalkylene terephthalate resin include phthalic acid, isophthalic acid, 4,4′-diphenyldicarboxylic acid, 4,4′-diphenylether dicarboxylic acid, 4,4′-benzophenone dicarboxylic acid, Aromatic dicarboxylic acids such as 4,4′-diphenoxyethanedicarboxylic acid, 4,4′-diphenylsulfonedicarboxylic acid, 2,6-naphthalenedicarboxylic acid, 1,2-cyclohexanedicarboxylic acid, 1,3-cyclohexanedicarboxylic acid Commonly used aliphatic dicarboxylic acids such as alicyclic dicarboxylic acids such as 1,4-cyclohexanedicarboxylic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, etc. Can be used.

Examples of diol components other than ethylene glycol or 1,4-butanediol include diethylene glycol, polyethylene glycol, 1,2-propanediol, 1,3-propanediol, polypropylene glycol, polytetramethylene glycol, dibutylene glycol, 1,5 -Aliphatic diols such as pentanediol, neopentyl glycol, 1,6-hexanediol, 1,8-octanediol, 1,2-cyclohexanediol, 1,4-cyclohexanediol, 1,1-cyclohexanedimethylol, 1 , 4-cyclohexane dimethylol and other alicyclic diols, xylylene glycol, 4,4′-dihydroxybiphenyl, 2,2-bis (4-hydroxyphenyl) propane, bis (4-hydroxyphenyl) sulfone, etc. And aromatic diols are used. Even if ethylene glycol or butylene glycol is used as a raw material, diethylene glycol or dibutylene glycol may be by-produced during the reaction and taken into polyalkylene terephthalate.

Further, if desired, hydroxycarboxylic acids such as lactic acid, glycolic acid, m-hydroxybenzoic acid, p-hydroxybenzoic acid, 6-hydroxy-2-naphthalenecarboxylic acid, p-β-hydroxyethoxybenzoic acid, alkoxycarboxylic acids, Monofunctional components such as stearyl alcohol, benzyl alcohol, stearic acid, benzoic acid, t-butylbenzoic acid, benzoylbenzoic acid, tricarbaric acid, trimellitic acid, trimesic acid, pyromellitic acid, gallic acid, trimethylolethane, trimethyl Trifunctional or higher polyfunctional components such as methylolpropane, glycerol and pentaerythritol can be used as the copolymerization component. These copolymer components are preferably used in an amount of 5% by weight, particularly 3% by weight or less of the polyalkylene terephthalate to be produced.

Production of polyalkylene terephthalate from dicarboxylic acid or its derivative and diol can be carried out by any conventional method. That is, any of a direct polymerization method in which terephthalic acid and glycol are directly esterified and a transesterification method in which dimethyl terephthalate is used as a main raw material can be used. The former is different in that water is produced in the initial esterification reaction, and the latter is produced in the initial transesterification reaction. The direct polymerization method is advantageous from the viewpoint of raw material costs.

In addition, both batch method and continuous method can be used. The initial esterification reaction or transesterification reaction is performed in a continuous operation, and the subsequent polycondensation is performed in a batch operation. Conversely, the initial esterification reaction is performed. Alternatively, the transesterification reaction can be performed by a batch operation, and the subsequent polycondensation can be performed by a continuous operation.

In the present invention, a polybutylene terephthalate resin having a terminal carboxyl group amount of 30 eq / t or less and a residual tetrahydrofuran amount of 300 ppm (weight ratio) or less, or a mixture of such a polybutylene terephthalate resin and a polyethylene terephthalate resin is used. Is preferred.

When a polybutylene terephthalate resin having a terminal carboxyl group amount of 30 eq / t or less is used, the hydrolysis resistance of the resulting resin composition can be enhanced. That is, since the carboxyl group acts as an autocatalyst for the hydrolysis of polybutylene terephthalate, if a terminal carboxyl group exceeding 30 eq / t is present, the hydrolysis starts early, and the generated carboxyl group becomes an autocatalyst. As a result, hydrolysis proceeds in a chain and the degree of polymerization of polybutylene terephthalate rapidly decreases. However, if the amount of terminal carboxyl groups is 30 eq / t or less, hydrolysis can be suppressed even under conditions of high temperature and high humidity. The amount of terminal carboxyl groups of polybutylene terephthalate can be determined by dissolving polybutylene terephthalate in an organic solvent and titrating with an alkali hydroxide solution.

The amount of residual tetrahydrofuran in the polybutylene terephthalate is preferably 300 ppm (weight ratio) or less, particularly preferably 200 ppm (weight ratio) or less. The amount of residual tetrahydrofuran can be determined by immersing the polybutylene terephthalate resin pellets in water and holding at 120 ° C. for 6 hours, and quantifying the amount of tetrahydrofuran eluted in water by gas chromatography. A resin composition using a polybutylene terephthalate resin having a large amount of residual tetrahydrofuran generates a large amount of organic gas at a high temperature. However, a molded product obtained from a resin composition using a polybutylene terephthalate resin having a residual tetrahydrofuran amount of 300 ppm (weight ratio) or less has little generation of organic gas even when used at a high temperature, and therefore, corrosion of electrical contacts is prevented. Since there is little fear, it can be used suitably for contact electrical and electronic parts such as relay parts.

The lower limit of the residual tetrahydrofuran amount is not particularly limited, but is usually about 50 ppm (weight ratio). A smaller amount of residual tetrahydrofuran tends to reduce the generation of organic gas, but the residual amount and the amount of gas generated are not necessarily proportional, and the presence of about 50 ppm of tetrahydrofuran does not pose a problem for normal use. Rather, the presence of a small amount of diol is said to suppress corrosion of electrical contacts (see JP-A-8-20900), and the same effect is expected for tetrahydrofuran.

Polystyrene resin As the polystyrene resin, any thermoplastic resin may be used. An aromatic vinyl monomer or a copolymer, an aromatic vinyl monomer, a vinyl cyanide monomer, A copolymer composed of a rubber component (for example, a copolymer of an aromatic vinyl monomer and a vinyl cyanide monomer, a polymer obtained by graft copolymerization of an aromatic vinyl monomer and a rubber component, rubber) Conventional components such as an amorphous rubber-like polymer obtained by graft copolymerization of aromatic vinyl monomer and vinyl cyanide monomer as components are used. Epoxy-modified polystyrene obtained by modifying these with an epoxy compound, or those obtained by bonding other polymer chains and polystyrene chains in various manners can also be used.

Examples of aromatic vinyl monomers include styrene and alkylstyrene (for example, vinyl toluenes such as o-, m-, and p-methylstyrene, vinylxylenes such as 2,4-dimethylstyrene, ethylstyrene, p- Alkyl-substituted styrenes such as isopropyl styrene, butyl styrene, p-t-butyl styrene), α-alkyl-substituted styrene (for example, α-methyl styrene, α-ethyl styrene, α-methyl-p-methyl styrene, etc.) Used. These styrenic monomers can be used alone or in combination of two or more. Of these, styrene, vinyl toluene, and α-methylstyrene are preferably used, and styrene is particularly preferably used.

As the vinyl cyanide monomer, for example, (meth) acrylonitrile is used. Vinyl cyanide monomers can also be used alone or in combination of two or more. A preferred vinyl cyanide monomer is acrylonitrile.

Examples of the rubber component include conjugated diene rubber (polybutadiene, polyisoprene, styrene-butadiene copolymer, acrylonitrile-butadiene copolymer, ethylene-propylene-5-ethylidene-2-norbornene copolymer, etc.), olefin rubber [ Ethylene-propylene rubber (EPDM rubber), ethylene-vinyl acetate copolymer, acrylic rubber and the like can be used, and these rubber components may be hydrogenated products. These rubber components can be used alone or in combination of two or more. Of these rubber components, conjugated diene rubbers are preferred. The rubber component can be used regardless of the gel content. The rubber component can be produced by a method such as emulsion polymerization, solution polymerization, suspension polymerization, bulk polymerization, solution-bulk polymerization, bulk-suspension polymerization.

The polystyrene-based resin may be used in combination with other copolymerizable monomers in addition to or in place of vinyl cyanide. Examples of such copolymerizable monomers include methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, t-butyl (meth) acrylate, and hexyl (meth) acrylate. , Esters of (meth) acrylic acid such as octyl (meth) acrylate and 2-ethylhexyl (meth) acrylate and alcohols having 1 to 18 carbon atoms, 2-hydroxyethyl (meth) acrylate, (meth) acrylic acid Examples include hydroxyl group-containing (meth) acrylates such as 2-hydroxypropyl and epoxy group-containing (meth) acrylates such as glycidyl (meth) acrylate.

In addition, carboxyl group-containing monomers [for example, unsaturated monocarboxylic acids such as (meth) acrylic acid and crotonic acid; aliphatic unsaturated dicarboxylic acids such as maleic anhydride, maleic acid, fumaric acid and itaconic acid, and acids thereof Anhydride; unsaturated dicarboxylic acid such as maleic acid monoester (monoester of maleic acid and monoethyl maleate such as monomethyl maleate, monoethyl maleate and monobutyl maleate) and fumaric acid monoester corresponding to these Acid monoesters, etc.], maleimide monomers [for example, N-alkylmaleimides such as maleimide and N-methylmaleimide, N-phenylmaleimides and the like]. These copolymerizable monomers can be used alone or in combination of two or more. Preferred copolymerizable monomers include (meth) acrylic acid esters (particularly methyl methacrylate), (meth) acrylic acid, maleic anhydride, maleimide monomers, and the like.

When another copolymerizable monomer is used in combination with the aromatic vinyl monomer, the ratio (weight ratio) between the two is aromatic vinyl monomer / other copolymerizable monomer = 100 / 0-10. / 90, preferably 95/5 to 10/90, more preferably about 80/20 to 20/80. The more aromatic vinyl monomer is, the greater the bleed-out suppression effect of the flame retardant is. On the other hand, although related to the degree of dispersion of the polystyrene resin in the resin composition, if the amount of the aromatic vinyl monomer is large, the resin composition tends to be carbonized, and the tracking property and the glow wire characteristic tend to be lowered.

More specifically, when vinyl cyanide monomer is used as a copolymerization component, the ratio (weight ratio) of aromatic vinyl monomer to vinyl cyanide monomer is aromatic vinyl monomer / cyan. Vinyl chloride monomer = 10/90 to 90/10, preferably about 20/80 to 80/20.

When the rubber component is used, the ratio (weight ratio) between the rubber component and the aromatic vinyl monomer is as follows: rubber component / aromatic vinyl monomer = 5 / 95-80 / 20, preferably 10 / 90-70 / About 30. When the ratio of the rubber component is small, the impact resistance of the resin composition is lowered, and when it is too large, the dispersion of the polystyrene-based resin becomes poor and the appearance tends to be impaired.

Preferred styrene resins include polystyrene (GPPS), acrylonitrile-styrene copolymer (AS resin), impact-resistant polystyrene (HIPS), graft polymer [acrylonitrile-butadiene-styrene copolymer (ABS resin), acrylonitrile- Acrylic rubber-styrene copolymer (AAS resin), acrylonitrile-ethylene-propylene rubber-styrene copolymer (AES resin), acrylonitrile-butadiene rubber-methyl methacrylate-styrene copolymer (ABSM resin), methyl methacrylate- Butadiene-styrene copolymer (MBS resin, etc.)], block copolymer [for example, styrene-butadiene-styrene (SBS) copolymer, styrene-isoprene-styrene (SIS) copolymer, styrene-ethylene-butylene - styrene (SEBS) copolymer, etc.), styrene - acrylonitrile - ethylene - propylene - ethylidene norbornene copolymer (AES), etc.], or the like of these hydrogenated products thereof.

Particularly preferred polystyrene resins include polystyrene (GPPS), acrylonitrile-styrene copolymer (AS resin), acrylonitrile-butadiene-styrene copolymer (ABS resin), and styrene-ethylene-butylene-styrene (SEBS) copolymer. More preferred are polystyrene (GPPS) and acrylonitrile-styrene copolymer (AS resin). These polystyrene resins can be used alone or in combination of two or more.

Among the polystyrene resins, an epoxy-modified polystyrene resin is preferable because it has good dispersibility and simultaneously improves the hydrolysis resistance of the resulting resin composition. The epoxy-modified polystyrene resin is obtained by introducing an epoxy group into a polystyrene resin. As a method for introducing the epoxy group, any conventionally known method can be used. Specifically, a polystyrene resin obtained by graft polymerization or copolymerization of an epoxy group-containing vinyl monomer is preferably used. Epoxy group-containing vinyl monomers are compounds that share both radically polymerizable vinyl groups and epoxy groups in one molecule. Specific examples include glycidyl acrylate, glycidyl methacrylate, glycidyl ethacrylate, and itaconic acid. Examples thereof include glycidyl esters of unsaturated organic acids such as glycidyl, glycidyl ethers such as allyl glycidyl ether, and the above derivatives such as 2-methylglycidyl methacrylate. Among them, glycidyl acrylate and glycidyl methacrylate are preferably used. These may be used alone or in combination of two or more.

As a method for producing a polystyrene-based resin obtained by graft polymerization or copolymerization of an epoxy group-containing vinyl-based monomer, a known method can be adopted, and in particular, styrene, or other monomers copolymerizable with styrene. A method of copolymerizing with an epoxy group-containing vinyl monomer, an epoxy group-containing vinyl monomer in a (co) polymer obtained by copolymerizing styrene or styrene and other monomers copolymerizable therewith The method of graft-polymerizing a body is mentioned. Furthermore, a polymer compound having a structure obtained by block copolymerization or graft copolymerization of a polymer composed of a copolymerizable unsaturated monomer containing an epoxy group with polystyrene, a comb-type polystyrene having an epoxy group added thereto, and an epoxy group added thereto. Examples thereof include polystyrene. Such copolymerization and graft polymerization can also be performed by known methods.

Preferable specific examples of the polystyrene-based resin used as a base when graft-polymerizing or copolymerizing an epoxy group-containing vinyl-based monomer with a radical generator or the like on the polystyrene-based resin include polystyrene (GPPS) and impact-resistant polystyrene. Resin mainly composed of styrene such as (HIPS), acrylonitrile / styrene copolymer (AS resin), styrene / (meth) acrylate copolymer, styrene copolymer such as styrene / butadiene resin, styrene / butadiene / Styrene resin, styrene / isoprene / styrene resin, block copolymer containing styrene such as styrene / ethylene / butadiene / styrene resin, acrylonitrile / butadiene / styrene resin, acrylonitrile / butadiene / methyl methacrylate / styrene tree ABS resins and the like can be mentioned. Of these, resins mainly composed of styrene and styrene copolymers are preferred, and acrylonitrile / styrene copolymers are most preferred.

The copolymer structure of the polymer having an epoxy group and the polystyrene polymer is not particularly limited. For example, it is a polymer composed of a copolymerizable unsaturated monomer having an epoxy group in the main chain. Comb-shaped polymer compound whose side chain is polystyrene, polymer compound composed of a copolymerizable unsaturated monomer containing an epoxy group and a block-copolymerized linear polymer compound, the main chain is polystyrene A polymer compound having a comb structure, which is a polymer composed of a copolymerizable unsaturated monomer having an epoxy group in the side chain, and a comb having an polystyrene group containing an epoxy group in the main chain and having a side chain made of polystyrene Examples thereof include a polymer compound having a mold structure, polystyrene having a small amount of an epoxy group added thereto, and the like.

Among them, a polymer composed of a copolymerizable unsaturated monomer having an epoxy group in the main chain and a high molecular compound having a comb structure whose side chain is polystyrene, and a polystyrene having an epoxy group in the main chain, A polymer compound having a comb-like structure in which the side chain is polystyrene, and a modified polystyrene having a small amount of an epoxy group added thereto are preferred. In particular, the polymer is composed of a copolymerizable unsaturated monomer containing an epoxy group in the main chain. A comb-shaped polymer compound in which the chain is polystyrene is preferable. These polystyrene-based resins containing epoxy groups may be a blend of a plurality of types.

The epoxy group content in the epoxy-modified polystyrene resin is not particularly limited as long as it is an amount effective for improving the compatibility between the polyalkylene terephthalate resin and the epoxy-modified polystyrene resin. The epoxy group-containing monomer is preferably 0.05% by weight or more based on the resin. When copolymerized in a large amount, there is a tendency for fluidity and gelation. Depending on the content of the epoxy group-containing monomer, the proportion of the epoxy-modified polystyrene resin in the resin component (A) is preferably 45% by weight or less, more preferably 40% by weight or less.

Two or more of these epoxy-modified polystyrene resins can be used in combination. Moreover, an epoxy-modified polystyrene resin and a polystyrene resin not containing an epoxy group can be used in combination, and according to this method, the content of the epoxy group of the polystyrene resin and the like can be easily adjusted.

In the present invention, the styrene component (styrene residue) content of the epoxy-modified polystyrene resin is preferably 50% by weight or more, more preferably 70% by weight in the case of the above-mentioned polystyrene resin mainly composed of styrene. In the case of a styrene copolymer, it is preferably 30% by weight or more, more preferably 50% by weight or more, and particularly preferably 60% by weight or more. In the case of an ABS resin, it is preferably 30% by weight or more, more preferably 40% by weight or more, and in the case of a block copolymer, it is 10% by weight or more, more preferably 20% by weight or more.

Compatibilizing agent Polystyrene resin must be dispersed in the form of fine particles in a polyalkylene terephthalate resin, and the dispersion state has a subtle effect on the flame retardancy and tracking characteristics of the resulting resin composition. give. However, polystyrene resins that do not have a reactive group with a polyalkylene terephthalate resin such as an epoxy group are often difficult to disperse well. However, when a strong shear force is mechanically applied to promote dispersion during the production of the resin composition, heat may be generated and troubles such as decomposition of the flame retardant may occur. Accordingly, it is preferable to add a small amount of a compatibilizing agent in order to promote dispersion. A preferable compatibilizer includes an epoxy compound. Examples of the epoxy compound include a bisphenol type epoxy compound, a resorcinol type epoxy compound, a novolac type epoxy compound, an alicyclic compound type diepoxy compound, a glycidyl ether, an epoxidized polybutadiene, and an epoxy flame retardant. In addition, the novolak-type epoxy compound used as a compatibilizing agent has a low molecular weight unlike the novolak-type phenol resin used as a molding material.

Specifically, bisphenol A type epoxy compounds, bisphenol F type epoxy compounds, resorcinol type epoxy compounds, novolac type epoxy compounds, alicyclic compound type epoxy compounds such as vinylcyclohexene dioxide and dicyclopentadiene oxide, and ethylene-glycidyl methacrylate Polymer, tetrabromobisphenol A epoxy oligomer, and the like. From the viewpoint of hydrolysis resistance and dispersion in the resin, a novolac type epoxy resin having an epoxy equivalent of 150 to 280 g / eq or a bisphenol A type epoxy resin having an epoxy equivalent of 600 to 3000 g / eq is preferably used. Among them, it is preferable to use a novolak type epoxy resin having an epoxy equivalent of 180 to 250 g / eq and a molecular weight of 1000 to 6000, or a bisphenol A type epoxy resin having an epoxy equivalent of 600 to 3000 g / eq and a molecular weight of 1200 to 6000.

The blending ratio of the polyalkylene terephthalate resin, the polystyrene resin and the compatibilizer constituting the resin component is 40 to 100% by weight for the polyalkylene terephthalate resin, 0 to 50% by weight for the polystyrene resin, and 0 to 10% for the compatibilizer. In general, the polyalkylene terephthalate resin is preferably 50 to 94% by weight, polystyrene resin 5 to 45% by weight, compatibilizer 0 to 2 to 8% by weight and a compatibilizer. In addition, when there are more compatibilizers than 10 weight%, fluidity | liquidity and a flame retardance will fall. Moreover, since an epoxy-containing polystyrene resin generally has good dispersibility, good dispersion can often be achieved without a compatibilizer. Considering this, the most preferable blending ratio of the resin composition (A) is 65 to 92% by weight of the polyalkylene terephthalate resin, 8 to 30% by weight of the polystyrene resin, and 0 to 8% by weight of the compatibilizer, that is, polyalkylene terephthalate. It is a compound mainly composed of resin.

(B) Flame retardant The resin composition of the present invention contains two kinds of flame retardants, phosphazene flame retardant (B-1) and nitrogen flame retardant (B-2), as essential components. . Preferably, a boric acid metal salt (B-3) is further contained therein as a third flame retardant. The amount of each flame retardant is 10 to 50 parts by weight for the phosphazene flame retardant (B-1) and 20 to 70 for the nitrogen flame retardant (B-2) with respect to 100 parts by weight of the resin component (A). Part by weight, the metal borate (B-3) is 0 to 20 parts by weight, and at the same time, the total amount needs to be 40 to 100 parts by weight. When the flame retardant (B) exceeds 100 parts by weight, CTI and glow wire characteristics are deteriorated, and more gas is generated. Conversely, if it is less than 40 parts by weight, flame retardancy, tracking characteristics and glow wire properties cannot be satisfied. From the point of further improving the CTI and glow wire characteristics, the blending ratio (B-1 / B-2) of the phosphazene flame retardant and the nitrogen flame retardant is 0.14 to 1.1, more preferably 0.2 to 2. It is preferably in the range of 1, 0, and most preferably in the range of 0,3 to 0,95. If it is less than 0, 14, it is difficult to ensure the desired flame retardancy, and if it exceeds 1, 1, GWIT tends to decrease.

(B-1) Phosphazene flame retardant As the phosphazene flame retardant, a phosphazene compound having a cyano-substituted phenyl group represented by the following formula (1) or (2) is used.

(In the above formulas (1) and (2), m represents an integer of 3 to 25, and n represents an integer of 3 to 1000. R1 and R2 represent a hydrogen atom, a cyano group, an alkyl group having 1 to 10 carbon atoms, allyl or .X where a phenyl group is a group _{-N = P (OC 6 H 4} R1) a (OC 6 H 4 R2) b, group _{-N = P (O) (OC} 6 H 4 R1), - N _{= P (O) (OC 6} H 4 R2) indicates, Y is a group _{-P (OC 6 H 4 R1)} c (OC 6 H 4 R2) d, group _{-P (O) (OC 6 H} 4 R1) _e (OC ₆ H ₄ R2) _{f wherein} R1 and R2 have the same meanings as described above, and a, b, c, d, e, and f are 0 satisfying a + b = 3, c + d = 4, and e + f = 2. (It is an integer above.)

In the phosphazene compound represented by the general formula (1) or (2), 2 to 98% of the total number of R1 and R2 is preferably a cyano group. Among these, those obtained by mixed substitution with a cyanophenoxy group and a phenoxy group are preferable in terms of easy availability, and the ratio of the cyanophenoxy group to the phenoxy group is 92: 2 to 2:92, particularly 1: 7 to 7: 1. Is preferred. Examples thereof include cyclic phosphazene compounds such as cyclotriphosphazene, cyclotetraphosphazene and cyclopentaphosphazene, which are mixed and substituted with a cyanophenoxy group and a phenoxy group, or linear phosphazene compounds corresponding thereto.

Specific examples of cyclic phosphazene compounds mixed and substituted with a cyanophenoxy group and a phenoxy group include, for example, monocyanophenoxypentaphenoxycyclotriphosphazene, dicyanophenoxytetraphenoxycyclotriphosphazene, tricyanophenoxytriphenoxycyclotriphosphazene, tetracyanophenoxy Cyclotriphosphazene compounds such as diphenoxycyclotriphosphazene and pentacyanophenoxymonophenoxycyclotriphosphazene, monocyanophenoxypeptaphenoxycyclotetraphosphazene, dicyanophenoxyhexaphenoxycyclotetraphosphazene, tricyanophenoxypentaphenoxycyclotetraphosphazene, tetra Cyanophenoxytetraphenoxycyclotetraphospha , Cyclotetraphosphazenes such as pentacyanophenoxytriphenoxycyclotetraphosphazene, hexacyanophenoxydiphenoxycyclotetraphosphazene, and heptacyanophenoxymonophenoxycyclotetraphosphazene, and cyclopentaphosphazene compounds mixed and substituted with cyanophenoxy and phenoxy groups And cyclic phosphazene compounds such as Examples of the linear phosphazene compound include those corresponding to the above 3 to 6 mer.

These phosphazene compounds may be used alone or in combination of two or more. When the cyclic phosphazene compound and the linear phosphazene compound are used in combination, it is preferable that the former is as high as 50% by weight or more because the stability of the resulting resin composition is good.
The phosphazene compound having a cyanophenoxy group can be produced by various methods, and an example of the synthesis method is described in Patent Document 8.

The amount of the phosphazene compound is 10 to 50 parts by weight, preferably 15 to 45 parts by weight, and further 20 to 40 parts by weight with respect to 100 parts by weight of the resin component (A). If it exceeds 50 parts by weight, tracking characteristics and mechanical properties are likely to deteriorate. In addition, bleed-out is facilitated, and the amount of gas generated increases.

(B-2) Nitrogen-based flame retardant An amino group-containing triazine salt is used as the nitrogen-based flame retardant. As amino group-containing triazines (triazines having an amino group), amino group-containing 1,3,5-triazines are usually used. For example, melamine, substituted melamine (2-methylmelamine, guanylmelamine, etc.), Melamine condensates (melam, melem, melon, etc.), melamine cocondensation resins (melamine-formaldehyde resin, etc.), cyanuric amides (ammelin, ammelide, etc.), guanamine or derivatives thereof (guanamine, methylguanamine, acetoguanamine, Benzoguanamine, succinoguanamine, adipogguanamine, phthalogamine, CTU-guanamine, etc.).

Examples of inorganic acids that form salts with these triazines include nitric acid, chloric acids (chloric acid, hypochlorous acid, etc.), phosphoric acids (phosphoric acid, phosphorous acid, metaphosphoric acid, pyrophosphoric acid, etc.), sulfuric acids (sulfuric acid, Non-condensed sulfuric acid such as sulfurous acid, condensed sulfuric acid such as peroxodisulfuric acid and pyrosulfuric acid), boric acid, chromic acid, antimonic acid, molybdic acid, tungstic acid and the like. Of these, phosphoric acid and sulfuric acid are preferred. Examples of organic acids include organic sulfonic acids (aliphatic sulfonic acids such as methanesulfonic acid, aromatic sulfonic acids such as toluenesulfonic acid and benzenesulfonic acid), and cyclic ureas (uric acid, barbituric acid, cyanuric acid, acetylene urea). Etc.). Among these, aromatic sulfonic acid and cyanuric acid which may be substituted with an alkyl group having 1 to 3 carbon atoms such as alkanesulfonic acid having 1 to 4 carbon atoms such as methanesulfonic acid and toluenesulfonic acid. Is preferred.

Examples of salts of amino group-containing triazines include melamine phosphates (melamine polyphosphate, melamine polyphosphate, melam, melem double salt, etc.), melamine sulfates (melamine sulfate, dimelamine sulfate, dimelam pyrosulfate), sulfone, etc. Melamines (Melamine methanesulfonate, melam methanesulfonate, melem methanesulfonate, melamine methanesulfonate, melam melem, double salt, melamine toluenesulfonate, melam toluenesulfonate, melamine toluene, melam memel double salt) Etc.). These salts of amino group-containing triazines can be used alone or in combination of two or more.

Among such nitrogen-based flame retardants, an adduct of cyanuric acid or isocyanuric acid and a triazine-based compound is preferably used in the present invention, and is usually 1 to 1 (molar ratio), sometimes 1 to 1 pair. It is an adduct having a composition of 2 (molar ratio). More specifically, they are melamine cyanurate, benzoguanamine cyanurate, acetoguanamine cyanurate, and further melamine cyanurate. These salts can be obtained by publicly known methods, for example, mixing triazine compounds and cyanuric acid or isocyanuric acid well in water to form both salts in the form of fine particles, and then filtering and drying them. Is generally obtained in powder form.

In addition, the above-mentioned salt does not have to be completely pure, and unreacted triazine compound, cyanuric acid, or isocyanuric acid may remain. In addition, the average particle diameter of the salt before being blended with the resin component is preferably 100 to 0.01 μm from the viewpoint of flame retardancy, mechanical strength and heat-and-moisture resistance properties, residence stability, and surface properties of the molded product. More preferably, it is 80-1 micrometer. Further, when the dispersibility of the salt is poor, a dispersant such as tris (β-hydroxyethyl) isocyanurate or a known surface treatment agent may be used in combination.

The amount of the nitrogen-based flame retardant is 20 to 70 parts by weight, preferably 25 to 60 parts by weight with respect to 100 parts by weight of the component (A). If the compounding amount of the nitrogen flame retardant exceeds 70 parts by weight, mechanical properties are likely to deteriorate.

(B-3) Boric acid metal salt The polyester resin composition of the present invention preferably contains a boric acid metal salt as a further flame retardant. As the boric acid metal salt, those which are stable under the processing conditions usually used and have no volatile components are preferable. Examples of the boric acid metal salt include alkali metal salts of boric acid (for example, sodium tetraborate, potassium metaborate), alkaline earth metal salts (for example, calcium borate, magnesium orthoborate, barium orthoborate), zinc borate and the like. Among these, zinc borate is preferable. Zinc borate is generally a hydrate having a formula represented by 2ZnO · 3B ₂ O ₃ · xH ₂ O (x = 3.3 to 3.7), but X is 3, 5 and 260 ° C. Or the thing stable to the temperature higher than it is preferable. Commercially available products include Alkanex FRF-30, FRC-500, and FRC-600 manufactured by Mizusawa Chemical Co., Ltd.

The compounding quantity of a boric-acid metal salt is 0-20 weight part with respect to 100 weight part of component (A), Preferably it is 2-15 weight part. When the compounding amount of the boric acid metal salt exceeds 20 parts by weight, the mechanical properties tend to be lowered.

(C) Inorganic filler It is preferable that the resin composition of the present invention further contains an inorganic filler. As fillers, fibrous fillers (glass fiber, carbon fiber, basalt fiber, silica / alumina fiber, zirconia fiber, boron fiber, boron nitride fiber, silicon nitride potassium titanate fiber, etc.), granular filler (kaolin, Silicates such as talc and wollastonite; carbonates of metals such as calcium carbonate; metal oxides such as titanium oxide), plate-like fillers (mica, glass flakes, various metal foils, etc.) and the like. Of these fillers, fibrous fillers, particularly glass fibers (such as chopped strands) are preferred in that they give a molded product having high strength and rigidity. These fillers can be used alone or in combination of two or more.

These fillers may be used in combination with a sizing agent or a surface treatment agent. Examples of such a sizing agent or surface treatment agent include compounds having a functional group such as an epoxy compound, a silane compound, and a titanate compound. The amount of the inorganic filler is 0 to 200 parts by weight, preferably 5 to 150 parts by weight, based on 100 parts by weight of the resin component (A), but is 50 for sufficiently manifesting the effect of the inorganic filler. It is preferable to add 50 parts by weight or more, particularly 50 to 130 parts by weight.

(D) Anti- drip agent It is preferable to add an anti-drip agent to the resin composition of the present invention. The dripping preventive agent may be a compound having a property of preventing dripping of the resin at the time of combustion, and silicon oil or the like can be used. From the viewpoint of flame retardancy of the resin composition, a fluorine-containing polymer is preferable. . The amount of the dripping inhibitor is selected from the range of 0.01 to 15 parts by weight with respect to 100 parts by weight of the resin component (A). If the blending amount is small, the dripping prevention effect during combustion is insufficient, and if it is too large, the fluidity and mechanical properties may be lowered.

Examples of the fluorine-containing polymer used as the anti-dripping agent (D) include polytetrafluoroethylene, tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer, tetrafluoroethylene / hexafluoropropylene copolymer, tetrafluoroethylene / ethylene copolymer. Polymers, fluorinated polyolefins such as vinylidene fluoride and polychlorotrifluoroethylene are preferred. Among them, polytetrafluoroethylene, tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer, tetrafluoroethylene / hexafluoropropylene copolymer, tetra Fluoroethylene / ethylene copolymers are more preferred, and polytetrafluoroethylene and tetrafluoroethylene / hexafluoropropylene copolymers are particularly preferably used.

The fluorine-containing polymer used as the anti-dripping agent (D) preferably has a melt viscosity at 350 ° C. of 1.0 × 10 ^{2 to} 1.0 × 10 ¹⁵ (Pa · s), of which 1.0 × ^{10 3 ~1.0 × 10 14 (Pa} · s), in particular is preferably used in ^{1.0 × 10 10 ~1.0 × 10 12} (Pa · s). When the melt viscosity is less than 1.0 × 10 ² (Pa · s), the ability to prevent dripping at the time of combustion is insufficient, and when it exceeds 1.0 × 10 ¹⁵ (Pa · s), the fluidity of the composition is low. Since it falls remarkably, it is not preferable.

These fluorine-containing polymers are preferably contained in an amount of 0.5 to 15 parts by weight with respect to 100 parts by weight of the resin component (A) in order to sufficiently exhibit the effect. More preferably, the content is 0.7 to 12 parts by weight, particularly 1 to 10 parts by weight. If the amount of the fluorine-containing polymer is less than 0.5 parts by weight, the dripping prevention effect during combustion may not be sufficiently exhibited in some cases, and conversely if more than 15 parts by weight, the fluidity and mechanical properties may be reduced. is there.

In addition to the above components (A) to (D), conventional additives and the like can be further blended into the resin composition of the present invention as necessary. There are no particular restrictions on the additives to be added. For example, additives such as antioxidants, heat stabilizers, lubricants, mold release agents, catalyst deactivators, crystal nucleating agents, crystallization accelerators, It can be added during or after the polymerization of alkylene terephthalate. Moreover, carbodiimide, oxazoline, etc. can be added in order to further improve hydrolysis resistance. Further, stabilizers such as ultraviolet absorbers and weathering stabilizers, colorants such as dyes and pigments, antistatic agents, foaming agents, plasticizers, impact resistance improvers and the like can be blended.

Furthermore, in the resin composition of the present invention, a resin other than the resin component (A) can be blended as necessary within a range not impairing the object of the present invention. However, as described above, the blending of polyphenylene ether resin, polyphenylene sulfide resin, and phenol resin is not preferable because it decreases the tracking characteristics, and these are not contained at all, or even if they are contained, each is 1% by weight or less in the resin composition. It is necessary to limit the content of. In the present specification, the polyphenylene ether resin and the polyphenylene sulfide resin mean those disclosed in Patent Document 8, and the phenol resin as disclosed in Patent Document 6.
Polyolefin resins such as polyethylene and polypropylene have the effect of improving tracking characteristics, but have the drawback of significantly reducing flame retardancy.

The method for producing the resin composition of the present invention is not particularly limited, and can be easily achieved by mixing each component by a known method. For example, dry blending using a blender or mixer, melt mixing using an extruder, etc., etc., but usually using a screw extruder, melt mixing and extruding into a strand, pelletizing The method to do is suitable. Each component may be melt-kneaded all together or the specific component may be melt-mixed first, but from the viewpoint of mechanical properties, the resin component (A) and the flame retardant (B) are first melt-mixed. A production method in which the remaining components are mixed is preferred. Also, a high-concentration master batch of a flame retardant is prepared from the polystyrene resin (A-2) and the flame retardant (B), and the polyalkylene terephthalate resin (A-1) is mixed and melt-kneaded with this. Is also an example of a preferable production method.

The method for producing a molded product from the resin composition of the present invention is not particularly limited, and molding methods generally used for thermoplastic resins, that is, molding methods such as injection molding, hollow molding, extrusion molding, and press molding are used. A particularly preferable molding method that can be applied is injection molding because of its good fluidity. In the injection molding, it is preferable to control the resin temperature to 240 to 290 ° C and the mold temperature to 60 to 120 ° C.

The resin composition of the present invention is excellent in flame retardancy, mechanical properties, etc., has no mold corrosion due to generation of corrosive gas, and has low specific gravity and excellent fluidity, so it can produce molded products with thin or complicated shapes. Can be suitably used. Therefore, it is suitable as a material for producing parts such as electric equipment and electronic equipment.

Furthermore, among the components of electrical equipment, electronic equipment, etc., the excellent properties of the resin composition of the present invention are sufficiently exerted because the resin molded part formed using this resin composition operates normally. Electrically insulating parts that are directly supporting connections that carry currents in excess of 0.2 A, i.e. rated currents in excess of 0.2 A, or within a distance of 3 mm from these connections, i.e. high electrical safety. This is the case when it is a required part. As described above, in the case of a component that requires high electrical safety, a resin molded portion formed using the above-described resin composition achieves a high GWFI value and a high GWIT, and has been conventionally required. The flame retardancy (V-0) of UL standard and requirements such as PTI can be satisfied, which is preferable.

Here, “the resin molded part is at a distance of 3 mm or less from the connection part through which a current exceeding 0.2 A flows during normal operation” means that, for example, in the case of a relay component, the connection part ( This means a case where a space of several millimeters is provided between the contact and the resin molding part, instead of directly supporting the contact). Even in such a case, high electrical safety is still necessary, and the resin composition of the present invention is effective.

Electrical insulating parts formed from the resin composition of the present invention are processed into electrical / electronic parts such as relays, switches, connectors, sensors, actuators, microsensors and microactuators by combining with metal contacts and copper plates. .

EXAMPLES Hereinafter, although an Example demonstrates this invention still in detail, this invention is not limited to a following example, unless the summary is exceeded. In Examples and Comparative Examples, the physical properties of polyalkylene terephthalate resins were measured and the resin compositions of the present invention were evaluated by the following methods.

(1) Terminal carboxyl group amount;
Polybutylene terephthalate (0.1 g) was dissolved in 3 ml of benzyl alcohol, and titrated with a 0.1 mol / liter-benzyl alcohol solution of sodium hydroxide.

(2) Temperature drop crystallization temperature;
Using a differential scanning calorimeter [Perkin Elmer, Model 1B], polybutylene terephthalate was heated from room temperature to 300 ° C. at a temperature increase rate of 20 ° C./min, and then decreased to 80 ° C. at a temperature decrease rate of 20 ° C./min. In this case, the temperature of the exothermic peak was measured and used as the temperature lowering crystallization temperature.

(3) residual tetrahydrofuran amount;
5 g of polybutylene terephthalate pellets were immersed in 10 g of water, kept under pressure at 120 ° C. for 6 hours, and tetrahydrofuran eluted in water was quantified by gas chromatography.

(4) Intrinsic viscosity;
Using a mixed solvent of an Ubbelohde viscometer and phenol / 1,1,2,2-tetrachloroethane (weight ratio 1/1) at 30 ° C., concentrations of 1.0 g / dl, 0.6 g / dl and 0.3 g The viscosity of the / dl solution was measured and the viscosity was extrapolated to zero concentration.

Each component used in Examples and Comparative Examples is as follows.
[raw materials]
(A-1a) PBT-1 resin : Polybutylene terephthalate resin produced by the following continuous polymerization method, the amount of terminal carboxyl groups is 20 eq / t, the temperature-falling crystallization temperature is 178 ° C., and the amount of residual tetrahydrofuran is 180 ppm ( Weight ratio) and intrinsic viscosity was 0.85 dl / g.

[PBT-1 production method]
Both raw materials were supplied to the slurry preparation tank at a ratio of 1.8 mol of 1,4-butanediol with respect to 1.0 mol of terephthalic acid, and mixed with a stirrer to prepare a slurry. The slurry was continuously transferred to a first esterification reaction vessel at a temperature of 230 ° C. and a pressure of 101 kPa by a gear pump, and tetrabutyl titanate was supplied (amount supplied was 3.14 parts by weight with respect to 2972 parts by weight of the slurry). The oligomer was obtained by esterification with stirring for 2 hours with stirring.

This oligomer was transferred to a second esterification reaction vessel adjusted to a temperature of 240 ° C. and a pressure of 101 kPa, and the esterification reaction was further advanced with stirring for 1 hour. Further, this oligomer was transferred to a first polycondensation reaction tank adjusted to a temperature of 250 ° C. and a pressure of 6.67 kPa, and subjected to a polycondensation reaction with stirring for 2 hours to obtain a prepolymer. The prepolymer was transferred to a second double condensation reaction tank adjusted to a temperature of 250 ° C. and a pressure of 133 Pa, and the polycondensation reaction was further advanced with stirring for 3 hours to obtain a polymer. This polymer was extracted from the second double condensation reaction tank, transferred to a die, drawn into a strand, and cut with a pelletizer to obtain a beret-like polybutylene terephthalate.

(A-1b) PBT resin: polybutylene terephthalate resin produced by the batch polymerization method described below, the amount of the terminal carboxyl group is 41eq / t, crystallization temperature is 170 ° C., the residual tetrahydrofuran amount 680 ppm (weight ratio ), And the intrinsic viscosity was 0.85 dl / g.

[PBT-2 production method]
The polymerization reaction was carried out using a batch apparatus. In a ratio of 1.8 mol of 1,4-butanediol with respect to 1.0 mol of dimethyl terephthalate, a total of 3226 parts by weight is supplied to the transesterification reaction tank, and 3.14 parts by weight of tetrabutyl titanate is added. An ester exchange reaction was performed at a temperature of 210 ° C. and a pressure of 101 kPa for 3 hours to obtain an oligomer. Subsequently, this oligomer was transferred to a polycondensation reaction tank, and under agitation, a polycondensation reaction was carried out at a temperature of 250 ° C. and a pressure of 133 Pa for 3 hours to obtain a polymer. Next, nitrogen pressure was applied to extract the strands, and the pellets were cut with a pelletizer to obtain pellets of polybutylene terephthalate.

(A-1c) PET resin : polyethylene terephthalate resin (manufactured by Mitsubishi Chemical Corporation, trade name Novapet (registered trademark) PBK1)

(A-2a) Epoxy-modified AS resin : AS resin (Sanlex (trade name) SAN-C melt mass flow rate 25 g / 10 min manufactured by Techno Polymer Co., Ltd.) 100 parts by weight, 3 parts by weight of glycidyl methacrylate and 2.5 parts by weight -Manufactured by blending 0.015 part by weight of dimethyl-2.5-di- (t-butylperoxy) hexyne, kneading at 210 ° C. using a 30 mm twin screw extruder and then pelletizing. . After extracting unreacted glycidyl methacrylate with acetone, quantification of glycidyl methacrylate was carried out by ultraviolet absorption spectrum measurement, and it was found that 1.7% by weight had reacted.

(A-2b) EGMA-g-PS : Epoxy-modified polystyrene resin (Nippon Yushi Co., Ltd., trade name Modiper (trade name) A4100 (comb-shaped structure polymer obtained by grafting polystyrene to an ethylene-glycidyl methacrylate copolymer), EGMA / PS = 70/30% by weight)

(A-2c) AS Resin: styrene - acrylonitrile copolymer resin (manufactured by Techno Polymer Co.) Sunrex (trade name) SAN-C melt mass flow rate 25 g / 10min

(A-2d) PS resin : GPPS resin (manufactured by PS Japan) Trade name HF77 Melt flow rate 7.5 g / 10 min

(A-3) Bisphenol A type epoxy resin (manufactured by Asahi Denka Kogyo Co., Ltd.) Trade name Adeka Sizer (trade name) EP17

(B-1a) 4-Cyanophenoxy group-containing phosphazene compound Referring to Synthesis Example 15 of Patent Document 8, the compound was synthesized as follows.
A 4-liter four-necked flask equipped with a stirrer, a heating device, a thermometer, and a dehydration device was charged with 1.76 mol of 4-cyanophenol, 0.88 mol of phenol, 2.64 mol of sodium hydroxide and 1000 ml of toluene. added. Next, this mixture was heated to reflux to remove moisture, and a toluene solution of cyanophenol and a sodium salt of phenol was prepared.

20% containing 1 mol of dichlorophosphazene oligomer (85% or more of cyclic 3 to 8 mer and linear chain of less than 15%) in terms of dichlorophosphazene in a toluene solution of sodium salt of cyanophenol and phenol 580 g of chlorobenzene solution was added dropwise at an internal temperature of 30 ° C. or lower while stirring. After the mixed solution was refluxed for 12 hours, a 5% aqueous sodium hydroxide solution was added to the reaction mixture and washed twice. Liquid separation was performed to obtain an organic layer, which was neutralized with dilute sulfuric acid and then washed twice with water.

Filtration gave a filtrate, which was concentrated and vacuum dried (vacuum drying conditions: 80 ° C., 5 mmHg, 12 hours) to obtain a phosphazene containing a cyanophenoxy group. This is almost “N = P (OC ₆ H ₄ CN) _1.34 (OC ₆ H ₅ ) _0.66 ” by elemental analysis, and the ratio of cyanophenol group is 67%. The melting point of this product was unclear.

(B-1b) Phenoxyphosphazene compound having a crosslinked structure with 2,2-bis (p-oxyphenyl) propane group The above synthesis example 2 of Patent Document 8 was added and synthesized. The obtained crosslinked phosphazene has a composition of [N = P (—O—Ph—C (CH ₃ ) ₂ —Ph—O—) _0.25 (—O—Ph) based on the phosphorus content and the CHN elemental analysis value. ) _1.50 ]. The melting point of this product was unclear.

(B-1c) Phosphazene compound : A phosphazene compound mainly composed of a cyclic product (FP-100 manufactured by Fushimi Pharmaceutical Co., Ltd.).

(B-2) Melamine cyanurate; manufactured by Mitsubishi Chemical Corporation, MX44.

(B-3) Zinc borate : Borax Japan, Firebreak (trade name) 500).

(C) Glass fiber; manufactured by Nippon Electric Glass Co., Ltd., epoxy silane treated product, 3 mm chopped strand Brand name: T-187.

(D) Polytetrafluoroethylene; manufactured by Daikin Industries, Ltd., Polyflon (trade name) F201.

(E) Brominated flame retardant : Brominated polystyrene (manufactured by Albemarle Japan), trade name Saytex (trade name) HP-7010.
(F) Antimony compound : antimony trioxide (manufactured by Morirokusha) MIC-3.

(G) Stabilizer : Hindered phenolic compound (manufactured by Ciba Specialty Japan), Irganox (trade name) 1010

(H) Mold release agent : Calcium montanate (CaV102 manufactured by Clariant Japan)

(I-1) PPE resin : Polyphenylene ether resin (Iupiace (registered trademark) manufactured by Mitsubishi Engineering Plastics), intrinsic viscosity 0.36.

(I-2) Phenolic resin : Novolac phenolic resin (Sumilite Resin (trade name) PR-53195 manufactured by Sumitomo Durez)

[Performance evaluation method]
(1) Flame Retardancy Test UL specimens (thickness 1/32 inch) were subjected to UL-94 standard vertical combustion test by Underwriters Laboratories Inc. The flame retardancy level was evaluated in the order of V-0>V-1>V-2> HB according to the standard. V-2 or higher flame retardancy is required, preferably V-0.

(2) Proof Tracking Index test (abbreviation: PTI test)
For the test piece (a flat plate having a thickness of 3 mm), the PTI was determined by the test method defined in the international standard IEC60112. This PTI is a numerical value of the guaranteed voltage in increments of 25V. PTI exhibits resistance to tracking at a voltage between 600 V and 100 V when wet-contaminated with an electric field applied to the surface of the solid electrical insulating material, and requires 550 V or more, preferably 600 V or more. is there.

(3) Glow-wire Flammability Index test (abbreviation: GWFI test)
The test method (flat plate with a thickness of 3 mm) was subjected to the test method defined in IEC60695-2-12. That is, a red hot rod having a predetermined shape (a nickel / chromium (80/20) wire having an outer diameter of 4 mm in a loop shape) is brought into contact for 30 seconds and then pulled apart. It is defined as the highest temperature at the tip that does not ignite during this time or extinguishes within 30 seconds after being released, and tests up to 960 ° C. 850 ° C. or higher is required for flame retardant applications. In this invention, it was determined whether it passed at 960 degreeC.

(4) Glow-wire Ignition Temperature test (abbreviation: GWIT test)
Three types of flat plate test pieces having thicknesses of 0.75 mm, 1.5 mm, and 3 mm were subjected to the test method defined in IEC 60695-2-13. That is, it is defined as a temperature that is 25 ° C. higher than the maximum temperature of the tip that does not ignite when a red hot rod having a predetermined shape (a nickel / chromium (80/20) wire having an outer diameter of 4 mm in a loop shape) is contacted for 30 seconds. For flame retardant use, 775 ° C. or higher is required as GWIT having a thickness of 0.8 to 3 mm. More preferably, 800 degreeC or more is calculated | required.

(5) Surface appearance evaluation test A flat plate test piece having a length of 100 mm, a width of 100 mm and a thickness of 3 mm was prepared by injection molding, and the surface was visually observed to evaluate the floating state of the glass fiber. ◎ good glass fiber lift is not recognized, glass fiber lift is slightly observed, but acceptable appearance range of general molded products ○, glass fiber lift is partially observed A sample was marked as Δ, and a glass fiber floating over a fairly wide range was observed, and those outside the allowable range were marked as x.

(6) Flame retardant bleed-out test Using a 10 cm square flat plate with a thickness of 3 mm as a sample, heat treatment was performed for 48 hours in a hot air dryer controlled at 150 ° C., and then the surface of the test piece was visually observed. The exudation of the fuel was classified into the following four stages, and ◎ and ○ were judged to be practically usable.
◎: No oozing, ○: Slight oozing is observed slightly:-: oozing, x: many oozing

(7) Tensile test : Measured according to ISO 527 using an ISO tensile test piece (ISO 3167).

(8) Hydrolysis resistance test The ISO tensile test piece was held in saturated steam at a temperature of 121C for 40 hours. About the ISO test piece before and behind a process, the tensile test was done based on ISO527 and the tensile strength retention was measured.

(9) Warpage measurement test Using a disk having a diameter of 100 mm and a thickness of 1.6 mm molded under the above-mentioned ISO tensile test piece molding conditions (the gate is a one-point gate on the circumference). Thus, warpage was measured as an evaluation of the anisotropy of the shrinkage rate. One end of the disc was fixed to a flat plate, and the distance by which the opposite side was lifted from the flat plate was measured and used as the amount of warpage. The smaller this value, the less the anisotropy and the less the molded product is preferable.

(10) Generated gas amount;
After putting 5 g of resin composition pellets into a glass vial with an internal volume of 26 ml and heating at 150 ° C. for 2 hours, a sample is taken from the gas phase using a microsyringe and analyzed by gas chromatography. The peak area of the chromatogram was determined, and the weight of tetrahydrofuran corresponding to the area was expressed as a ratio (ppm) to the resin composition.

[Examples 1 to 11 and Comparative Examples 1 to 13]
Components other than the glass fibers shown in Table 1 were mixed together with a super mixer (SK-350 type, manufactured by Shinei Machinery Co., Ltd.). The obtained mixture was put into a hopper of a twin screw extruder (manufactured by Nippon Steel Works, TEX30HSST) with L / D = 42, and (C) glass fiber was side-fed to a discharge rate of 20 kg / h, screw rotation Extrusion was performed under conditions of several 150 rpm and a barrel temperature of 260 ° C. to obtain pellets of the resin composition.

The resin composition pellets were tested using the injection molding machine (manufactured by Sumitomo Heavy Industries, Model SH-100) under the conditions of a cylinder temperature of 270 ° C. and a mold temperature of 100 ° C. Pieces (three types of flat plate test pieces of 10 cm in length and width, thickness of 0.75 mm, 1.5 mm and 3 mm, and a test piece of UL-94 standard having a thickness of 1/32 inch) were manufactured. In addition, as a test piece of (7) and (8), an ISO tensile test piece (ISO 3167) was molded at 265 ° C. using an injection molding machine (model S-75 MIII manufactured by Sumitomo Heavy Industries, Ltd.). . The test piece (9) was also molded at 265 ° C. and a mold temperature of 90 ° C. using an injection molding machine (model S-75 MIII manufactured by Sumitomo Heavy Industries, Ltd.). Said evaluation was implemented using the above test piece. The pellets of the above resin composition were dried with hot air at 120 ° C. for 8 hours, and the amount of gas generated in (10) was measured. The evaluation results are shown in Table 1.

Table 1 shows the following.
(1) The comparative example 1 which does not mix | blend a flame retardant (B), and mix | blended the brominated flame retardant and the antimony compound has low PTI, and GWIT does not reach 775V in the thickness of 1.5 mm or less. There is a very limited range of use.

(2) Comparative Examples 2 and 3 in which a phosphazene compound not containing a cyano group was blended as usual instead of a phosphazene compound containing a cyano group had good flame retardancy, tracking properties, and glow wire properties. The bleed-out is remarkable. In place of the phosphazene compound containing a cyano group, a phosphazene compound not containing a cyano group was blended, and further PPE resin or phenol resin was blended with Comparative Examples 4 to 5, and the flame retardant (B) was further blended with PPE resin or phenol resin. In the blended Comparative Examples 10 to 13, the bleed out is improved, but the tracking property is remarkably deteriorated. Further, Comparative Examples 4 to 5 have a poor surface appearance.

(3) In Comparative Example 6 in which the blending amount of the polystyrene-based resin is excessive and Comparative Example 7 in which the blending amount of the flame retardant (B) is small, the flame retardancy and the glow wire property are lowered.
In Comparative Example 8 in which the blending amount of the flame retardant (B) is excessive, gas generation is large, and in Comparative Example 9 in which the flame retardant (B-1) is excessive and (B-2) is insufficient, the flame retardancy is high. , PTI and GWIT are low.

(4) In Examples 1 to 11 within the scope of the present invention, the flame retardancy is also V-0 or V-1, the PTI is 550 V, the 960 ° C. GWFI is acceptable, and the GWIT is also 0.75-3. It was proved that the electrical safety was extremely high at 775 V or more in the range of 0 mm thickness. Further, the flame retardant bleed-out is small, and the mechanical strength is slightly lower than that of Comparative Example 1, but is practically usable. Hydrolysis resistance is good.

(5) Example 1 based on a PBT resin in which the amount of terminal carboxyl groups and the amount of residual tetrahydrofuran are in a suitable range is compared with Example 5 using a PBT resin outside this range. It turns out that it is suitable for use in contact parts such as relays. (Refer to said Unexamined-Japanese-Patent No. 8-20900)
(6) Comparing Example 1 in which the blending ratio of the phosphazene-based flame retardant and the nitrogen-based flame retardant is within a suitable range with Example 2 outside this range, it was carried out in terms of bleed out, GWIT, and generated gas amount. Example 1 is superior.

(7) In Comparative Examples 10 to 11 in which PPE resin or phenol resin is further blended in the composition of Example 1, the flame retardancy and bleed-out property are good, but the tracking property is remarkably lowered.
(8) Comparing Examples 6 to 11 in which various polystyrene resins were blended with Example 1 in which no polystyrene resin was blended, the blend of polystyrene resins has flame retardancy, tracking properties, and glow wire properties. Improve warpage while maintaining almost the same.

(9) When Examples 8 and 9 using a polystyrene-based resin not containing an epoxy group and not containing a compatibilizer are compared, Example 8 using AS resin is Example 9 using GPPS resin. The tracking characteristics and the glow wire characteristics are slightly better than the above.
(10) Compared with Examples 6, 7, 10 and 11 in which Examples 8 and 9 were combined with a polystyrene resin or AS resin containing an epoxy group and a compatibilizing agent, the hydrolysis resistance was slightly deteriorated. Yes. Further, both flame retardancy maintained V-0, but the combustion time was slightly longer.

As described above, as is apparent from Table 1, the molded product formed of the resin composition according to the present invention has suppressed flame retardant bleed-out and has good flame retardancy, PTI, GWFI, GWIT and mechanical properties. Furthermore, the low warpage property which was excellent by mix | blending a polystyrene-type resin is shown. Therefore, this is stipulated in IEC 60335-1 for the provision of electrical insulation components that support connections through which current exceeding 0.2 A flows during normal operation, and electrical insulation components within 3 mm from these connections. It turns out that it is suitable. It can also be seen that the use of a PBT resin with a small amount of terminal carboxyl groups and residual tetrahydrofuran is particularly useful as a contact part such as a relay with a small amount of generated gas.

Claims (14)

(A-1) Resin component (A) 100 comprising 40 to 100% by weight of a polyalkylene terephthalate resin, (A-2) 0 to 50% by weight of a polystyrene-based resin, and (A-3) 0 to 10% by weight of a compatibilizer. For parts by weight
(B-1) 10 to 50 parts by weight of a cyanophenoxy group-containing phosphazene flame retardant, (B-2) 20 to 70 parts by weight of a nitrogen flame retardant comprising a salt of an amino group-containing triazine, and (B-3) a metal borate Flame retardant consisting of 0 to 20 parts by weight of salt (B) (however, the total of these flame retardants is 40 to 100 parts by weight) and (C) 0 to 200 parts by weight of inorganic filler, Does not contain any of polyphenylene ether resin, polyphenylene sulfide resin, and phenolic resin (except for epoxy group-containing novolak epoxy resins that act as compatibilizers). Is a resin composition characterized by having a maximum of 1% by weight or less. (A-1) Resin component comprising 50 to 94% by weight of polyalkylene terephthalate resin, (A-2) 5 to 45% by weight of polystyrene-based resin, and (A-3) 0.2 to 8% by weight of compatibilizer (A ) For 100 parts by weight
(B-1) 15 to 45 parts by weight of a cyanophenoxy group-containing phosphazene flame retardant, (B-2) 25 to 60 parts by weight of a nitrogen flame retardant comprising a salt of an amino group-containing triazine, and (B-3) a metal borate Comprising 2 to 15 parts by weight of a flame retardant (B) (however, the total of these flame retardants is 40 to 100 parts by weight) and (C) 5 to 150 parts by weight of an inorganic filler, Does not contain any of polyphenylene ether resin, polyphenylene sulfide resin, and phenolic resin (except for epoxy group-containing novolak epoxy resins that act as compatibilizers). Is a resin composition characterized by having a maximum of 1% by weight or less. 100 parts by weight of a resin component comprising (A-1) 65 to 92% by weight of a polyalkylene terephthalate resin, (A-2) 8 to 30% by weight of a polystyrene-based resin, and (A-3) 0 to 8% by weight of a compatibilizer. In contrast,
(B-1) 20 to 40 parts by weight of a cyanophenoxy group-containing phosphazene flame retardant, (B-2) 25 to 60 parts by weight of a nitrogen flame retardant comprising a salt of an amino group-containing triazine, and (B-3) a metal borate A flame retardant comprising 2 to 15 parts by weight of salt (B) (however, the total of these flame retardants is 40 to 100 parts by weight) and (C) 50 to 130 parts by weight of an inorganic filler, Does not contain any of ether resins, polyphenylene sulfide resins, and phenolic resins (except for epoxy group-containing novolak epoxy resins that act as compatibilizers). A resin composition characterized by being at most 1 part by weight. At least a part of the polyalkylene terephthalate resin (A-1) is a polybutylene terephthalate resin having a terminal carboxyl group amount of 30 eq / t or less and a residual tetrahydrofuran amount of 300 ppm or less. 4. The resin composition according to any one of 3. The resin composition according to any one of claims 1 to 4, wherein the polystyrene resin (A-2) contains an epoxy group. The resin composition according to any one of claims 1 to 5, wherein the polyalkylene terephthalate resin (A-1) is a mixture of a polybutylene terephthalate resin and a polyethylene terephthalate resin. The ratio (B-1) / (B-2) of the cyanophenoxy group-containing phosphazene-based flame retardant (B-1) to the nitrogen-based flame retardant (B-2) composed of a salt of an amino group-containing triazine is 0. It is the range of 14-1.1, The resin composition in any one of Claim 1 thru | or 6 characterized by the above-mentioned. The ratio (B-1) / (B-2) of the cyanophenoxy group-containing phosphazene-based flame retardant (B-1) to the nitrogen-based flame retardant (B-2) composed of a salt of an amino group-containing triazine is 0. The resin composition according to any one of claims 1 to 6, wherein the resin composition is in the range of 3 to 0.95. The resin composition according to any one of claims 1 to 8, wherein the inorganic filler (C) is fibrous. 10. The resin composition according to claim 1, comprising 0.01 to 15 parts by weight of a fluorine-containing polymer as an anti-dripping agent (D) with respect to 100 parts by weight of the resin component (A). . It has a molded part molded using the resin composition according to any one of claims 1 to 10, and the molded part directly supports a connection part through which a rated current exceeding 0,2A flows, Alternatively, an electrically insulating component is characterized in that a portion within a distance of 3 mm from these connecting portions is formed. A molded part having a thickness of 2 mm or less formed using the resin composition according to any one of claims 1 to 10, wherein the molded part directly connects a connecting part through which a rated current exceeding 0.2 A flows. An electrically insulating part characterized in that it supports or forms a part within a distance of 3 mm from these connecting parts. The electrically insulating component according to claim 11 or 12, wherein the connecting portion is a contact point. 14. The device according to claim 11, which is used for a contacted electrical / electronic component selected from the group consisting of a relay, a switch, a connector, a sensor, an actuator, a microswitch, a microsensor, and a microactuator. Electrically insulated parts as described.