Resin composition, pellets, and molded article

Abstract

Provided are a resin composition, pellets, and a molded article. The resin composition comprises a poly(alkylene terephthalate) resin, a flame retardant, an epoxy compound having an internal epoxide in the molecule, and a non-fibrous inorganic filler, wherein the mass ratio of the content of the non-fibrous inorganic filler to the content of the epoxy compound having an internal epoxide in the molecule, (non-fibrous inorganic filler) / (epoxy compound having internal epoxide in the molecule), is 0.5-50.

Description

Resin composition, pellets, and molded products

[0001] The present invention relates to a resin composition, a pellet, and a molded article, and more particularly to a resin composition containing a polyalkylene terephthalate resin as a main component.

[0002] Polyalkylene terephthalate resins, typified by polybutylene terephthalate resin and polyethylene terephthalate resin, are widely used in electrical and electronic equipment parts, automotive interior and exterior parts and other electrical parts, machine parts, etc. In order to impart flame retardancy to polyalkylene terephthalate resins, a flame retardant is sometimes blended therein (Patent Document 1, Patent Document 2).

[0003] JP 2010-024272 A JP 2016-166358 A

[0004] However, it has been found that even when an epoxy compound is further blended into a resin composition containing a polyalkylene terephthalate resin and a flame retardant, hydrolysis resistance may be impaired. It has also been found that blending an epoxy compound may reduce productivity during production of the resin composition and / or reduce the fluidity of the resin composition. Meanwhile, in recent years, blending a non-fibrous inorganic filler has been considered to improve tracking resistance. However, blending an inorganic filler may result in poor fluidity. The present invention aims to solve these problems and to provide a resin composition containing a flame retardant and having excellent flame retardancy, which has a good balance of hydrolysis resistance, productivity, fluidity, tracking resistance, mechanical strength, and rigidity, as well as pellets and molded articles.

[0005] In light of the above-mentioned problems, the present inventors conducted research and found that the above-mentioned problems could be solved by using an epoxidized fatty acid ester as an epoxy compound and adjusting the ratio of the epoxidized fatty acid ester to a non-fibrous inorganic filler. Specifically, the above-mentioned problems were solved by the following means. A resin composition comprising a polyalkylene terephthalate resin, a flame retardant, an epoxy compound having an internal epoxide in its molecule, and a non-fibrous inorganic filler, wherein the mass ratio of the content of the non-fibrous inorganic filler to the content of the epoxy compound having an internal epoxide in its molecule, i.e., non-fibrous inorganic filler / epoxy compound having an internal epoxide in its molecule, is 0.5 to 50. [1] A resin composition comprising a polyalkylene terephthalate resin, a flame retardant, an epoxy compound having an internal epoxide in its molecule, and a non-fibrous inorganic filler, wherein the mass ratio of the content of the non-fibrous inorganic filler to the content of the epoxy compound having an internal epoxide in its molecule, i.e., non-fibrous inorganic filler / epoxy compound having an internal epoxide in its molecule, is 0.5 to 50. [2] A resin composition comprising a polyalkylene terephthalate resin, a flame retardant, an epoxidized fatty acid ester, and talc and / or barium sulfate, wherein the content of the epoxidized fatty acid ester is 0.5 to 20 parts by mass and the content of the talc and / or barium sulfate is 4 to 40 parts by mass per 100 parts by mass of the polyalkylene terephthalate resin. [3] The resin composition according to [2], wherein the content of an epoxy compound other than the epoxidized fatty acid ester is less than 10% by mass of the epoxidized fatty acid ester, and the content of the nitrogen-based flame retardant is 19 parts by mass or less per 100 parts by mass of the polyalkylene terephthalate resin. [4] The resin composition according to any one of [1] to [3], wherein the epoxy compound having an internal epoxide in the molecule is an epoxidized fatty acid ester, and the content of the epoxy compound having an internal epoxide in the molecule is 0.5 to 12 parts by mass per 100 parts by mass of the polyalkylene terephthalate resin. [5] The resin composition according to any one of [1] to [4], wherein the epoxy compound having an internal epoxide in the molecule includes a compound represented by formula (A-1): (In formula (A-1), R １ and R ２ At least one of R is an alkyl group, a cycloalkyl group, an alkenyl group, or an aryl group; ３ and R ４ At least one of R is an alkyl group, a cycloalkyl group, an alkenyl group, or an aryl group. １ , R ２ , R ３ and R ４Each group in the formula (I) may have a substituent, and the substituent may further have a substituent.) [6] The resin composition according to any one of [1] to [5], wherein the content of the epoxy compound other than the epoxidized fatty acid ester is less than 10% by mass of the content of the epoxidized fatty acid ester. [7] The resin composition according to any one of [1] to [6], wherein the content of the nitrogen-based flame retardant in the flame retardant is 0 to 19 parts by mass per 100 parts by mass of the polyalkylene terephthalate resin. [8] The resin composition according to any one of [1] to [7], wherein the polyalkylene terephthalate resin comprises a polybutylene terephthalate resin. [9] The resin composition according to any one of [1] to [8], wherein the flame retardant comprises a phosphorus-based flame retardant.

[10] The resin composition according to any one of [1] to [9], wherein the flame retardant comprises a nitrogen-based flame retardant.

[11] The resin composition according to any one of [1] to

[10] , wherein the flame retardant comprises a halogen-based flame retardant.

[12] The resin composition according to any one of [1] to

[11] , wherein the flame retardant comprises aluminum diethylphosphinate.

[13] The resin composition according to any one of [1] to

[12] , wherein the epoxy compound having an internal epoxide in the molecule comprises an epoxidized vegetable oil.

[14] The resin composition according to any one of [1] to

[13] , further comprising glass fibers, wherein the glass fibers have an average fiber diameter of 5 to 9 μm.

[15] The resin composition according to any one of [1] to

[14] , further comprising glass fibers, wherein the glass fibers have an elastic modulus of 80 GPa or more and are substantially free of elemental boron.

[16] The resin composition according to any one of [1] to

[15] , further comprising glass fibers, wherein the glass fibers have an irregular cross-sectional shape.

[17] The resin composition according to any one of [1] to

[16] , wherein the epoxy compound having an internal epoxide in the molecule is an epoxidized fatty acid ester, the content of the epoxy compound having an internal epoxide in the molecule is 0.5 to 12 parts by mass relative to 100 parts by mass of the polyalkylene terephthalate resin, the epoxy compound having an internal epoxide in the molecule comprises a compound represented by formula (A-1), the content of epoxy compounds other than the epoxidized fatty acid ester is less than 10 mass% of the content of the epoxidized fatty acid ester, the polyalkylene terephthalate resin comprises a polybutylene terephthalate resin, the epoxy compound having an internal epoxide in the molecule comprises an epoxidized vegetable oil, and further comprises glass fibers, the glass fibers having an average fiber diameter of 5 to 9 μm or an elastic modulus of 80 GPa or more, and substantially no boron element, or glass fibers having an irregular cross-sectional shape. (In formula (A-1), R １ and R ２ At least one of R is an alkyl group, a cycloalkyl group, an alkenyl group, or an aryl group; ３ and R ４ At least one of R is an alkyl group, a cycloalkyl group, an alkenyl group, or an aryl group. １ , R ２ , R ３ and R ４Each group in the formula (I) may have a substituent, and the substituent may further have a substituent.)

[18] The resin composition according to any one of [1] to

[17] , wherein the content of dimethyl silicone oil is 1.5 parts by mass or less per 100 parts by mass of the polyalkylene terephthalate resin.

[19] The resin composition according to any one of [1] to

[18] , wherein the resin composition is substantially free of an inorganic hydrate compound.

[20] The resin composition according to any one of [1] to

[19] , wherein the resin composition is substantially free of an amorphous resin.

[21] The resin composition according to any one of [1] to

[20] , wherein the resin composition is substantially free of a fluorine-based resin.

[22] The resin composition according to any one of [1] to

[21] , wherein the flame retardant comprises a phosphorus-based flame retardant, and wherein a molded article formed from the resin composition has a tracking resistance of 600 V or more as measured in accordance with IEC 60112:2020.

[23] The resin composition according to any one of [1] to

[22] , wherein the flame retardant comprises a halogen-based flame retardant, and a molded article formed from the resin composition has a tracking resistance of 400 V or more as measured in accordance with IEC 60112:2020.

[24] Pellets of the resin composition according to any one of [1] to

[23] .

[25] A molded article molded from the resin composition according to any one of [1] to

[23] .

[26] A molded article molded from the pellets according to

[24] .

[0006] The present invention makes it possible to provide a resin composition containing a flame retardant and having excellent flame retardancy, which has a good balance of hydrolysis resistance, productivity, fluidity, tracking resistance, mechanical strength, and rigidity, as well as pellets and molded articles.

[0007] Hereinafter, a mode for carrying out the present invention (hereinafter simply referred to as "the present embodiment") will be described in detail. Note that the following present embodiment is an example for explaining the present invention, and the present invention is not limited to this embodiment. Note that in this specification, the use of "to" means that the numerical values ​​before and after it are included as the upper and lower limits. Furthermore, any combination of the upper and lower limit values ​​of numerical values ​​in this specification is cited as an example of this embodiment. In this specification, various physical property values ​​and characteristic values ​​are at 23°C unless otherwise specified. If the measurement methods, etc. described in the standards shown in this specification vary depending on the fiscal year, they shall be based on the standards as of January 1, 2024, unless otherwise specified. If the measurement methods, etc. described in the standards shown in this specification are abolished as of January 1, 2024, they shall be based on the standards at the time of abolition.

[0008] The resin composition of this embodiment is a resin composition containing a polyalkylene terephthalate resin, a flame retardant, an epoxy compound having an internal epoxide in its molecule, and a non-fibrous inorganic filler, wherein the mass ratio of the content of the non-fibrous inorganic filler to the content of the epoxy compound having an internal epoxide in its molecule, i.e., non-fibrous inorganic filler / epoxy compound having an internal epoxide in its molecule, is 0.5 to 50. The resin composition of this embodiment is also a resin composition containing a polyalkylene terephthalate resin, a flame retardant, an epoxidized fatty acid ester, and talc and / or barium sulfate, wherein the content of the epoxidized fatty acid ester is 0.5 to 20 parts by mass and the content of the talc and / or barium sulfate is 4 to 40 parts by mass per 100 parts by mass of the polyalkylene terephthalate resin.

[0009] By using this configuration, a resin composition containing a flame retardant can be obtained that has excellent flame retardancy and a well-balanced hydrolysis resistance, productivity, fluidity, tracking resistance, mechanical strength, and rigidity. Blending a flame retardant with a polyalkylene terephthalate resin can improve the flame retardancy of the resulting resin composition. Blending an epoxy compound with a polyalkylene terephthalate resin can improve the hydrolysis resistance of the resulting molded product. However, it has been speculated that flame retardants tend to decompose the polyalkylene terephthalate resin, increasing the number of terminal groups in the polyalkylene terephthalate resin. It has been speculated that an increase in the number of terminal groups in the polyalkylene terephthalate resin promotes the reaction between the terminal groups of the polyalkylene terephthalate resin and the epoxy groups of the epoxy compound, resulting in increased viscosity and a decrease in the fluidity of the resin composition, as well as gelation during the production of the resin composition, resulting in a decrease in productivity. In particular, when a nitrogen-based flame retardant is used as the flame retardant, it has been speculated that the reaction between the terminal amino groups in the flame retardant and the epoxy groups of the epoxy compound may be promoted, resulting in a significant decrease in productivity and a deterioration in fluidity. In this embodiment, it is believed that the above-mentioned problem can be solved by using an epoxidized fatty acid ester as the epoxy compound. That is, since the epoxidized fatty acid ester is obtained by epoxidizing a fatty acid ester, the epoxy group is contained internally rather than at the terminal. It is believed that the use of such an epoxidized fatty acid ester makes it difficult for the epoxy group of the epoxy compound to react with the terminal group of the polyalkylene terephthalate resin. Furthermore, even when an epoxidized fatty acid ester is used as the epoxy compound, the originally required hydrolysis resistance is fully achieved, thereby solving the above-mentioned problem. Meanwhile, tracking resistance also tends to be required for such resin compositions. To improve tracking resistance, it is considered to incorporate a non-fibrous inorganic filler. However, it has been found that incorporating a non-fibrous inorganic filler tends to reduce fluidity and mechanical strength. It has also been found that this may affect flame retardancy, hydrolysis resistance, and productivity.Furthermore, it was found that the balance between flame retardancy, hydrolysis resistance, productivity, fluidity, tracking resistance, mechanical strength, and rigidity may be lost. Under these circumstances, it is believed that the above-mentioned problems can be successfully solved by adjusting the total amount of the epoxidized fatty acid ester and the non-fibrous inorganic filler in the resin composition and adjusting the ratio of the non-fibrous inorganic filler to the epoxidized fatty acid ester. The details of the present invention are described below.

[0010] <Polyalkylene terephthalate resin> The resin composition of the present embodiment contains a polyalkylene terephthalate resin. In the present embodiment, the polyalkylene terephthalate resin preferably contains a polyethylene terephthalate resin and / or a polybutylene terephthalate resin, and more preferably contains at least a polybutylene terephthalate resin.

[0011] More specifically, the polyalkylene terephthalate resin is a polyester obtained by polycondensation of terephthalic acid as a dicarboxylic acid compound with a diol, and may be either a homopolyester or a copolyester.

[0012] As the dicarboxylic acid compound constituting the polyalkylene terephthalate resin, a terphthalic acid compound or an ester-forming derivative thereof is preferably used. Aromatic dicarboxylic acids other than terephthalic acid can also be used in combination. Examples include isophthalic acid, orthophthalic acid, 1,5-naphthalenedicarboxylic acid, 2,5-naphthalenedicarboxylic acid, 2,6-naphthalenedicarboxylic acid, biphenyl-2,2'-dicarboxylic acid, biphenyl-3,3'-dicarboxylic acid, biphenyl-4,4'-dicarboxylic acid, diphenylether-4,4'-dicarboxylic acid, diphenylmethane-4,4'-dicarboxylic acid, diphenylsulfone-4,4'-dicarboxylic acid, diphenylisopropylidene-4,4'-dicarboxylic acid, 1,2-bis(phenoxy)ethane-4,4'-dicarboxylic acid, anthracene-2,5-dicarboxylic acid, anthracene-2,6-dicarboxylic acid, p-terphenylene-4,4'-dicarboxylic acid, and pyridine-2,5-dicarboxylic acid. These can be used in the polycondensation reaction as ester-forming derivatives such as dimethyl esters in addition to free acids. Of the above, isophthalic acid or its ester-forming derivatives are particularly preferred.

[0013] In addition, a small amount of terephthalic acid or the above-mentioned aromatic dicarboxylic acid may be used in combination with one or more aliphatic dicarboxylic acids such as adipic acid, azelaic acid, dodecanedioic acid, and sebacic acid, or alicyclic dicarboxylic acids such as 1,2-cyclohexanedicarboxylic acid, 1,3-cyclohexanedicarboxylic acid, and 1,4-cyclohexanedicarboxylic acid.

[0014] Examples of dihydroxy compounds constituting the polyalkylene terephthalate resin include aliphatic diols such as ethylene glycol, propylene glycol, butanediol, hexylene glycol, neopentyl glycol, 2-methylpropane-1,3-diol, diethylene glycol, and triethylene glycol, alicyclic diols such as cyclohexane-1,4-dimethanol, and mixtures thereof. Of these, butanediol and ethylene glycol are particularly preferred.

[0015] It is also possible to copolymerize one or more long-chain diols having a molecular weight of 400 to 6,000, such as polyethylene glycol, poly-1,3-propylene glycol, polytetramethylene glycol, etc. Also usable are aromatic diols such as hydroquinone, resorcinol, naphthalenediol, dihydroxydiphenyl ether, and 2,2-bis(4-hydroxyphenyl)propane.

[0016] In addition to the above-mentioned bifunctional monomers, a small amount of a trifunctional monomer such as trimellitic acid, trimesic acid, pyromellitic acid, pentaerythritol, or trimethylolpropane can be used in combination to introduce a branched structure, or a monofunctional compound such as a fatty acid can be used in combination to adjust the molecular weight.

[0017] The polyalkylene terephthalate resin is preferably one formed by polycondensation of terephthalic acid and a diol, i.e., one in which the polycondensate accounts for more than 50% by mass of the entire resin, preferably 70% by mass or more, more preferably 80% by mass or more, even more preferably 90% by mass or more, still more preferably 95% by mass or more, and even more preferably 99% by mass or more. The diol is preferably an aliphatic diol, and 1,4-butanediol or ethylene glycol is preferred, with 1,4-butanediol being more preferred.

[0018] The amount of terminal carboxyl groups in the polyalkylene terephthalate resin (preferably polybutylene terephthalate resin) may be appropriately selected and determined, but is usually 80 eq / ton or less, preferably 50 eq / ton or less, more preferably 30 eq / ton or less, even more preferably 20 eq / ton or less, and even more preferably 15 eq / ton or less. By setting it to the above upper limit or less, the hydrolysis resistance of the resin composition tends to be improved. The lower limit of the amount of terminal carboxyl groups is not particularly specified, but is usually 3 eq / ton or more, preferably 5 eq / ton or more, and more preferably 10 eq / ton or more.

[0019] The amount of terminal carboxyl groups in the polyalkylene terephthalate resin is determined by dissolving 0.5 g of the resin in 25 mL of benzyl alcohol and titrating the solution with a 0.01 mol / L benzyl alcohol solution of sodium hydroxide. The amount of terminal carboxyl groups can be adjusted by any conventional method, such as adjusting the polymerization conditions, such as the raw material charge ratio, polymerization temperature, and pressure reduction during polymerization, or by reacting a terminal blocking agent.

[0020] The intrinsic viscosity of the polyalkylene terephthalate resin (preferably polybutylene terephthalate resin) is preferably 0.50 dL / g or more, more preferably 0.60 dL / g or more, even more preferably 0.70 dL / g or more, even more preferably 0.75 dL / g or more, and even more preferably 0.80 dL / g or more. By setting it to the above lower limit or above, deterioration of physical properties such as strength tends to be effectively suppressed. Furthermore, the intrinsic viscosity of the polyalkylene terephthalate resin (preferably polybutylene terephthalate resin) is preferably 1.30 dL / g or less, more preferably 1.15 dL / g or less, even more preferably 1.00 dL / g or less, even more preferably 0.95 dL / g or less, and even more preferably 0.90 dL / g or less. By setting it to the above upper limit or below, deterioration of the fluidity of the resin composition tends to be effectively suppressed.

[0021] Intrinsic viscosity is measured by the following method. Polyalkylene terephthalate resin pellets are dissolved in a mixed solvent of phenol / 1,1,2,2-tetrachloroethane (1 / 1 by mass ratio) by stirring at 110°C for 1 hour to a concentration of 1.00 g / dL. The solution is then cooled to 30°C. Using a fully automatic solution viscometer, the number of seconds it takes for the sample solution and the solvent alone to fall at 30°C are measured, and the intrinsic viscosity is calculated using the formula: Intrinsic viscosity = ((1 + 4K Ｈ η ｓｐ ) ０．５ -1) / (2K Ｈ C) where η ｓｐ = η / η ０ -1, η is the number of seconds the sample solution falls, η ０is the number of seconds for the solvent to fall, C is the concentration of the sample solution (g / dL), K Ｈ is Huggins' constant. Ｈ The intrinsic viscosity of the mixture is used. The fully automatic solution viscometer used is a product of Shibayama Scientific Co., Ltd. When the resin composition of the present embodiment contains two or more polyalkylene terephthalate resins, the intrinsic viscosity is the intrinsic viscosity of the mixture.

[0022] Preferred polyalkylene terephthalate resins are those in which 95 mol % or more of the acid component is terephthalic acid and 95 mol % or more of the alcohol component is an aliphatic diol, representative examples of which are polybutylene terephthalate resin and polyethylene terephthalate resin. These are similar to homopolyesters, i.e., preferably comprise 95 mol % or more of the terephthalic acid component and 1,4-butanediol or ethylene glycol component. The polyalkylene terephthalate resin is preferably polybutylene terephthalate resin and / or polyethylene terephthalate resin. Among these, the polyalkylene terephthalate resin preferably contains polybutylene terephthalate resin as the main component, and more than 50 mass % of the polyalkylene terephthalate resin is preferably polybutylene terephthalate resin. In this case, it is also preferable to contain polyethylene terephthalate resin in an amount of less than 50 mass %.

[0023] Polybutylene terephthalate resin can be produced by batch or continuous melt polymerization of a dicarboxylic acid component containing terephthalic acid as the main component or an ester derivative thereof with a diol component containing 1,4-butanediol as the main component. Furthermore, after producing a low-molecular-weight polybutylene terephthalate resin by melt polymerization, the degree of polymerization (or molecular weight) can be increased to a desired value by further solid-state polymerization under a nitrogen gas flow or reduced pressure.

[0024] The polybutylene terephthalate resin is preferably produced by continuous melt polycondensation of a dicarboxylic acid component containing terephthalic acid as the main component and a diol component containing 1,4-butanediol as the main component.

[0025] The catalyst used in carrying out the esterification reaction may be a conventionally known catalyst, such as a titanium compound, a tin compound, a magnesium compound, or a calcium compound. Among these, titanium compounds are particularly preferred. Specific examples of titanium compounds used as esterification catalysts include titanium alcoholates such as tetramethyl titanate, tetraisopropyl titanate, and tetrabutyl titanate, and titanium phenolates such as tetraphenyl titanate.

[0026] The polybutylene terephthalate resin may be a polybutylene terephthalate resin modified by copolymerization (hereinafter, also referred to as a "modified polybutylene terephthalate resin"), and specific preferred copolymers thereof include polyester ether resins copolymerized with polyalkylene glycols (particularly polytetramethylene glycol), dimer acid copolymerized polybutylene terephthalate resins, and isophthalic acid copolymerized polybutylene terephthalate resins.

[0027] When a polyester ether resin copolymerized with polytetramethylene glycol is used as the modified polybutylene terephthalate resin, the proportion of the tetramethylene glycol component in the copolymer is preferably 3 to 40% by mass, more preferably 5 to 30% by mass, and even more preferably 10 to 25% by mass. When a dimer acid copolymerized polybutylene terephthalate resin is used as the modified polybutylene terephthalate resin, the proportion of the dimer acid component in all carboxylic acid components is preferably 0.5 to 30 mol%, more preferably 1 to 20 mol%, and even more preferably 3 to 15 mol%, in terms of carboxylic acid groups. When an isophthalic acid copolymerized polybutylene terephthalate resin is used as the modified polybutylene terephthalate resin, the proportion of the isophthalic acid component in all carboxylic acid components is preferably 1 to 30 mol%, more preferably 1 to 20 mol%, and even more preferably 3 to 15 mol%, in terms of carboxylic acid groups. Among the modified polybutylene terephthalate resins, polyester ether resins copolymerized with polytetramethylene glycol and isophthalic acid copolymerized polybutylene terephthalate resins are preferred.

[0028] The content of the polyalkylene terephthalate resin (preferably polybutylene terephthalate resin and / or polybutylene terephthalate resin) in the resin composition of this embodiment is preferably 10% by mass or more, more preferably 15% by mass or more, and even more preferably 20% by mass or more, based on 100% by mass of the resin composition. Depending on the application, it may be 30% by mass or more, 40% by mass or more, or 50% by mass or more. Furthermore, the content of the polyalkylene terephthalate resin (preferably polybutylene terephthalate resin and / or polybutylene terephthalate resin) is preferably 80% by mass or less, more preferably 75% by mass or less, and even more preferably 70% by mass or less. Depending on the application, it may be 60% by mass or less, 55% by mass or less. The resin composition of this embodiment may contain only one type of polyalkylene terephthalate resin (preferably polybutylene terephthalate resin and / or polybutylene terephthalate resin), or may contain two or more types. When two or more types are contained, it is preferable that the total amount is within the above range.

[0029] <Flame Retardant> The resin composition of this embodiment contains a flame retardant. The type of flame retardant is not particularly limited, and known flame retardants can be used. Examples include halogen-based flame retardants, phosphorus-based flame retardants (metal phosphinates, melamine polyphosphate, etc.), nitrogen-based flame retardants (melamine cyanurate, etc.), and metal hydroxides (magnesium hydroxide, etc.). One example of a flame retardant in this embodiment is a phosphorus-based flame retardant, and another example is a nitrogen-based flame retardant. In particular, phosphorus-based flame retardants are thought to easily decompose polyalkylene terephthalate resins. Nitrogen-based flame retardants are also thought to easily react with epoxy groups in epoxy compounds and harden. In this embodiment, even when these flame retardants are used, it is believed that the addition of an epoxy compound by using an epoxidized fatty acid ester as the epoxy compound sufficiently achieved the hydrolysis resistance originally required. Furthermore, it is believed that a decrease in productivity during the production of the resin composition and a decrease in the flowability of the resulting resin composition were suppressed.

[0030] <<Phosphorus-Based Flame Retardant>> Examples of phosphorus-based flame retardants include metal phosphinates, melamine polyphosphates, condensed phosphate esters, and phosphazene compounds, with metal phosphinates being preferred.

[0031] When a metal phosphinate is used as a flame retardant, the type thereof is not particularly limited, but it is preferable that the metal phosphinate has an anion moiety represented by formula (4) or formula (5) and a metal ion of the cation moiety is any one of calcium, magnesium, aluminum, and zinc.

[0032] (In the formula, R １ and R ２ each independently represents an alkyl group having 1 to 6 carbon atoms or an aryl group which may have a substituent, R １ may be the same or different, and R ３ represents an alkylene group having 2 to 10 carbon atoms, an arylene group which may have a substituent, or a group consisting of a combination thereof; R ３ may be the same or different, and n represents an integer of 0 to 2.) The aryl group which may have a substituent is preferably a phenyl group which may have a substituent. When the aryl group has a substituent, it is preferably an alkyl group having 1 to 3 carbon atoms. It is also preferable that the aryl group is unsubstituted. The arylene group which may have a substituent is preferably a phenylene group which may have a substituent. The arylene group which may have a substituent is preferably unsubstituted or has an alkyl group having 1 to 3 carbon atoms (preferably a methyl group) as a substituent. In this embodiment, a metal phosphinate represented by formula (4) is preferable. In this embodiment, aluminum phosphinate is preferable, and aluminum diethylphosphinate is more preferable.

[0033] Specific examples of the metal phosphinate include calcium dimethylphosphinate, magnesium dimethylphosphinate, aluminum dimethylphosphinate, zinc dimethylphosphinate, calcium ethylmethylphosphinate, magnesium ethylmethylphosphinate, aluminum ethylmethylphosphinate, zinc ethylmethylphosphinate, calcium diethylphosphinate, magnesium diethylphosphinate, aluminum diethylphosphinate, zinc diethylphosphinate, calcium methyl-n-propylphosphinate, magnesium methyl-n-propylphosphinate, aluminum methyl-n-propylphosphinate, zinc methyl-n-propylphosphinate, calcium methanedi(methylphosphinate), and methanedi(methylphosphinate). Examples of suitable metal phosphinates include magnesium benzene-1,4-bis(methylphosphinate), aluminum methane bis(methylphosphinate), zinc methane bis(methylphosphinate), calcium benzene-1,4-bis(methylphosphinate), magnesium benzene-1,4-bis(methylphosphinate), aluminum benzene-1,4-bis(methylphosphinate), zinc benzene-1,4-bis(methylphosphinate), calcium methylphenylphosphinate, magnesium methylphenylphosphinate, aluminum methylphenylphosphinate, zinc methylphenylphosphinate, calcium diphenylphosphinate, magnesium diphenylphosphinate, aluminum diphenylphosphinate, and zinc diphenylphosphinate, with aluminum diethylphosphinate being preferred. For details of the metal phosphinates, please refer to paragraphs 0052 to 0058 of WO 2010 / 010669, the contents of which are incorporated herein by reference. For details of the phosphorus-based flame retardant, please refer to paragraphs 0064 to 0084 of WO 2021 / 241471, the contents of which are incorporated herein by reference.

[0034] The content of the phosphorus-based flame retardant in the resin composition of this embodiment is preferably 1 part by mass or more, more preferably 5 parts by mass or more, even more preferably 10 parts by mass or more, even more preferably 15 parts by mass or more, even more preferably 20 parts by mass or more, even more preferably 25 parts by mass or more, and preferably 40 parts by mass or less, more preferably 35 parts by mass or less, and even more preferably 30 parts by mass or less, per 100 parts by mass of the polyalkylene terephthalate resin. By setting the content at or above the lower limit, the flame retardancy and tracking resistance of the resulting molded article tend to be further improved. Furthermore, by setting the content at or below the upper limit, the mechanical strength of the resulting molded article tends to be further improved. The resin composition of this embodiment may contain only one type of phosphorus-based flame retardant, or may contain two or more types. When two or more types are contained, the total amount is preferably within the above range.

[0035] <<Nitrogen-Based Flame Retardants>> Examples of nitrogen-based flame retardants include aliphatic amine compounds, aromatic amine compounds, nitrogen-containing heterocyclic compounds, cyan compounds, aliphatic amides, aromatic amides, urea, and thiourea. Examples of aliphatic amines include ethylamine, butylamine, diethylamine, ethylenediamine, butylenediamine, triethylenetetramine, 1,2-diaminocyclohexane, and 1,2-diaminocyclooctane. Examples of aromatic amines include aniline and phenylenediamine. Examples of nitrogen-containing heterocyclic compounds include uric acid, adenine, guanine, 2,6-diaminopurine, 2,4,6-triaminopyridine, and triazine compounds. Examples of cyan compounds include dicyandiamide, examples of aliphatic amides include N,N-dimethylacetamide, and examples of aromatic amides include N,N-diphenylacetamide.

[0036] The triazine compounds exemplified above are nitrogen-containing heterocyclic compounds having a triazine skeleton, and examples thereof include triazine, melamine, benzoguanamine, methylguanamine, cyanuric acid, melamine cyanurate, melamine isocyanurate, trimethyltriazine, triphenyltriazine, ameline, amelide, thiocyanuric acid, diaminomercaptotriazine, diaminomethyltriazine, diaminophenyltriazine, diaminoisopropoxytriazine, etc. As the melamine cyanurate or melamine isocyanurate, an adduct of cyanuric acid or isocyanuric acid with a triazine compound is preferred, and examples thereof include adducts having a molar ratio of usually 1:1, and in some cases 1:2.

[0037] Among the nitrogen-based flame retardants, nitrogen-containing heterocyclic compounds are preferred, among which triazine compounds are more preferred, and melamine cyanurate is even more preferred.

[0038] The resin composition of this embodiment may or may not contain a nitrogen-based flame retardant. When the resin composition of this embodiment contains a nitrogen-based flame retardant, the content thereof is, relative to 100 parts by mass of the polyalkylene terephthalate resin, 0 parts by mass or more, preferably 1 part by mass or more, more preferably 5 parts by mass or more, and even more preferably 10 parts by mass or more. Depending on the application, etc., it may be 12 parts by mass or more, or preferably 19 parts by mass or less, more preferably 18 parts by mass or less, and even more preferably 16 parts by mass or less. Depending on the application, etc., it may be 14 parts by mass or less, 13 parts by mass or less, 10 parts by mass or less, 8 parts by mass or less, 5 parts by mass or less, 3 parts by mass or less, 1 part by mass or less, or 0.1 parts by mass or less. By setting the content at or above the lower limit, the flame retardancy and tracking resistance of the obtained molded article tend to be further improved. Furthermore, by setting the content at or below the upper limit, the mechanical strength tends to be further improved, gelation during the production of the resin composition tends to be suppressed, and a decrease in fluidity due to thickening of the resin composition tends to be suppressed. The resin composition of the present embodiment may contain only one nitrogen-based flame retardant, or may contain two or more nitrogen-based flame retardants. When two or more nitrogen-based flame retardants are contained, the total amount is preferably in the above range.

[0039] <<Halogen-Based Flame Retardant>> For details of the halogen-based flame retardant, please refer to paragraphs 0044 to 0067 of WO 2023 / 090374, the contents of which are incorporated herein by reference.

[0040] The content (total amount) of the flame retardant in the resin composition of this embodiment is preferably 5 parts by mass or more, more preferably 10 parts by mass or more, even more preferably 15 parts by mass or more, even more preferably 20 parts by mass or more, and even more preferably 25 parts by mass or more, relative to 100 parts by mass of the polyalkylene terephthalate resin. Depending on the application, it may be 30 parts by mass or more, and preferably 50 parts by mass or less, more preferably 40 parts by mass or less, and may be 35 parts by mass or less depending on the application. By setting the content to be equal to or greater than the lower limit, flame retardancy tends to be further improved. Meanwhile, by setting the content to be equal to or less than the upper limit, it tends to be easier to obtain a resin composition that has excellent flowability, an excellent balance of mechanical strength and rigidity, and excellent tracking resistance. The resin composition of this embodiment may contain only one type of flame retardant, or may contain two or more types. When two or more types are contained, it is preferable that the total amount be within the above range. When a halogen-based flame retardant is blended as the flame retardant, it is preferable to blend an antimony compound in combination with it. Examples of antimony compounds include antimony trioxide, antimony tetroxide, antimony pentoxide, and sodium antimonate. These antimony compounds may be blended in powder form, but are preferably blended in the form of a masterbatch in which the compound is preliminarily melt-kneaded at a high concentration with a thermoplastic resin and then diluted. This tends to improve the thermal stability of the entire resin composition. The blending amount of the antimony compound is preferably between 10 and 100 parts by mass per 100 parts by mass of the halogen-based flame retardant. From the perspective of improving flame retardancy, blending the compound so that the ratio of the amount of halogen element to the amount of antimony element is in the range of 6 / 1 to 1 / 1 is particularly preferred.

[0041] <Epoxidized Fatty Acid Ester / Epoxy Compound Having Internal Epoxide in the Molecule> This resin composition contains an epoxy compound having an internal epoxide in the molecule (an internal epoxide-containing epoxy compound). By including an epoxy compound having an internal epoxide in the molecule, such as in the compound backbone, a resin composition can be obtained that can provide molded products with excellent hydrolysis resistance, even when a flame retardant is incorporated. Because it is particularly resistant to reaction with polyalkylene terephthalate resins during melt-kneading, production instability, such as resin clogging at the die opening and strand pulsation due to thickening and gelation in the extruder, is unlikely to occur. Furthermore, during molding of the resulting pellets, reactions and thickening due to the epoxy compound are unlikely to occur, tending to provide excellent flowability and thermal stability. These effects allow for a higher amount of epoxy compound to be incorporated into the resin composition, which tends to facilitate the development of higher levels of moist heat resistance. The epoxidized fatty acid ester is a compound obtained by epoxidizing a fatty acid ester. As the fatty acid ester, a fatty acid ester having one or more (preferably 2 to 10) unsaturated bonds within the molecule is preferred. An example of an epoxidized fatty acid ester is an epoxy compound having an internal epoxide in the molecule (sometimes referred to herein as an "internal epoxide-containing epoxy compound").

[0042] The internal epoxide-containing epoxy compound is a compound having the structure (A). In the structure (A), * represents a bonding site to another site. Specific examples of the internal epoxide-containing epoxy compound include compounds represented by formula (A-1). In the above structure (A-1), R １ and R ２ At least one of R is an alkyl group, a cycloalkyl group, an alkenyl group, or an aryl group; ３ and R ４ At least one of R is an alkyl group, a cycloalkyl group, an alkenyl group, or an aryl group. １ , R ２ , R ３ and R ４ Each group in the formula (I) may have a substituent, and the substituent may further have a substituent.

[0043] Examples of the substituent are preferably a halogen atom, a cyano group, a nitro group, a hydroxy group, an alkyl group, an alkoxy group, an aryl group, an aryloxy group, a heterocyclic group, a heterocyclicoxy group, an alkenyl group, an alkylsulfanyl group, an arylsulfanyl group, an acyl group, or an amino group, more preferably a halogen atom, an alkyl group, an alkoxy group, an aryl group, an aryloxy group, an alkenyl group, or an acyl group, even more preferably an alkyl group, an aryl group, an aryloxy group, or an alkenyl group, and still more preferably an alkyl group. The formula weight of these substituents is preferably 15 or more, and preferably 200 or less. The formula weight is, for example, the formula weight of a methyl group (-CH ３ ), then the answer is 15.

[0044] The molecular weight of the compound represented by formula (A-1) is preferably 50 or more, more preferably 70 or more, and preferably 5,000 or less, more preferably 1,000 or less. By making the molecular weight equal to or greater than the lower limit, bleed-out of the epoxy compound can be more effectively suppressed, and molded articles with superior mechanical strength tend to be obtained. Furthermore, by making the molecular weight equal to or less than the upper limit, compatibility with thermoplastic polyester resins tends to be further improved. When the compound represented by formula (A-1) is a mixture, the molecular weight is a weighted average value.

[0045] Conventionally, epoxy compounds blended with thermoplastic resins have generally been compounds having the structure (B) (hereinafter referred to as "terminal epoxides"). In structure (B), * represents a bonding site to another site. An example of a compound having structure (B) is a compound represented by formula (B-1). In formula (B), R １ｘ and R ２ｘ are both hydrogen atoms, or R ３ｘ and R ４ｘ are both hydrogen or R １ｘ ~R ４ｘ At least three of R are hydrogen atoms. １ｘ ~R ４ｘAmong these, the groups other than hydrogen atoms are substituents, and the substituents described above in the section on formula (A-1) are preferred.

[0046] In the case of a compound having structure (A), the epoxy group is not at a terminal position but is located inside the molecule, such as in the main chain, so the reaction is less likely to proceed, and a sufficient amount of epoxy groups can remain in the resulting molded article. As a result, the moist heat resistance of the molded article can be improved. In contrast, in the case of a compound having structure (B), the epoxy group is at a terminal position, so the reaction is more likely to proceed, and the effect of improving the moist heat resistance of the molded article is lower than in the case of a compound having structure (A).

[0047] In the present embodiment, the internal epoxide-containing epoxy compound is, for example, an epoxy compound containing more of the structure (A) than the structure (B), and does not exclude the presence of the structure (B).

[0048] The epoxidized fatty acid ester and / or epoxy compound having an internal epoxide in the molecule is preferably an epoxidized natural oil. The epoxidized natural oil can be an epoxidized animal oil or an epoxidized vegetable oil. Examples of animal oils include beef tallow, lard, chicken fat, milk fat, and fish oil. Examples of vegetable oils include any oil whose main component is a triglyceride containing an unsaturated fatty acid as a fatty acid component, such as soybean oil, rapeseed oil, linseed oil, corn oil, palm oil, sunflower oil, grape oil, cottonseed oil, sesame oil, rice bran oil, peanut oil, castor oil, tung oil, safflower oil, olive oil, and grapeseed oil. At least one oil selected from the group consisting of soybean oil, rapeseed oil, linseed oil, corn oil, and palm oil is preferred, with soybean oil and / or linseed oil being more preferred, and linseed oil being even more preferred.

[0049] The epoxy equivalent of the epoxidized fatty acid ester is preferably 1500 g / eq or less, more preferably 1000 g / eq or less, even more preferably 800 g / eq or less, even more preferably 500 g / eq or less, still more preferably 300 g / eq or less, and preferably 50 g / eq or more, more preferably 75 g / eq or more, even more preferably 100 g / eq or more, still more preferably 150 g / eq or more. By setting it to the upper limit or less, hydrolysis resistance tends to be improved. Furthermore, by setting it to the lower limit or more, thickening of the resin composition tends to be suppressed. When the resin composition of this embodiment contains two or more epoxy compounds, the epoxy equivalent is the weighted average of the epoxy equivalents of the respective epoxy compounds.

[0050] For details of the epoxidized fatty acid ester, in addition to the above, reference can be made to the descriptions in paragraphs 0046 to 0070 of JP-A-2019-026727 and the descriptions in paragraphs 0016 to 0025 of JP-A-2023-136871, the contents of which are incorporated herein by reference. Commercially available epoxidized fatty acid esters can also be used, such as Chemizer SE-100 (epoxidized soybean oil, ESBO, general-purpose grade), Chemizer SE-100ST (epoxidized soybean oil, high-grade), and Chemizer ELS-100 (epoxidized linseed oil), all manufactured by Sanwa Synthetic Chemical Industry Co., Ltd.; and Sanso Cizer E-2000H (epoxidized soybean oil) and Sanso Cizer E-9000H (epoxidized linseed oil), all manufactured by Shin-Nihon Rikagaku Co., Ltd. Examples of such epoxidized fatty acids include SANSO CIZER E-4030 (epoxidized fatty acid isobutyl ester), SANSO CIZER E-6000 (epoxidized fatty acid 2-ethylhexyl ester), manufactured by ADEKA Corporation, ADEKA CIZER O-130P (epoxidized soybean oil), ADEKA CIZER O-180A (epoxidized linseed oil), ADEKA CIZER D-32 (epoxidized fatty acid octyl ester), and ADEKA CIZER D-55 (epoxidized fatty acid alkyl ester).

[0051] The content of the epoxidized fatty acid ester and / or internal epoxide-containing epoxy compound in the resin composition of this embodiment is preferably 0.1 parts by mass or more, more preferably 0.5 parts by mass or more, even more preferably 1 part by mass or more, even more preferably 2.5 parts by mass or more, even more preferably 3 parts by mass or more, even more preferably 4 parts by mass or more, and preferably 20 parts by mass or less, more preferably 15 parts by mass or less, even more preferably 13 parts by mass or less, even more preferably 12 parts by mass or less, even more preferably 10 parts by mass or less, and even more preferably 8 parts by mass or less, per 100 parts by mass of the alkylene terephthalate resin. By setting the content at or above the lower limit, the hydrolysis resistance of the resin tends to be further improved. By setting the content at or below the upper limit, the effect of suppressing gelation during compounding tends to be further improved, bleed-out of the epoxidized fatty acid ester tends to be suppressed, and a decrease in mechanical strength and rigidity tends to be suppressed. In addition, the flame retardancy of the resulting molded article can be further improved. The resin composition of the present embodiment may contain only one type of epoxidized fatty acid ester and / or epoxy compound having an internal epoxide in the molecule, or may contain two or more types. When two or more types are contained, it is preferable that the total amount is in the above range.

[0052] In the resin composition of this embodiment, the content of epoxy compounds other than the epoxidized fatty acid esters and the epoxy compounds having an internal epoxide in the molecule is preferably less than 10% by mass of the content of the epoxidized fatty acid esters and the epoxy compounds having an internal epoxide in the molecule. Thus, by reducing the content of epoxy compounds other than epoxidized fatty acid esters and other epoxy compounds, gelation of the resulting resin composition tends to be effectively suppressed. In the resin composition of this embodiment, the content of epoxy compounds other than the epoxidized fatty acid esters and other epoxy compounds is preferably less than 7% by mass of the content of the epoxidized fatty acid esters and other epoxy compounds, more preferably less than 5% by mass, even more preferably less than 3% by mass, even more preferably less than 1% by mass, and even more preferably less than 0.1% by mass. Examples of epoxy compounds other than the epoxidized fatty acid esters and / or the epoxy compounds having an internal epoxide in the molecule include novolac epoxy resins and bisphenol A epoxy resins. In this specification, an epoxy compound other than an epoxidized fatty acid ester and / or an epoxy compound having an internal epoxide in the molecule, which also corresponds to other components explicitly stated in this specification (for example, an elastomer or a glycidyl methacrylate-modified resin), is not considered to be an "epoxy compound other than an epoxidized fatty acid ester" in this embodiment.

[0053] <<Non-fibrous inorganic filler>> The resin composition of this embodiment contains a non-fibrous inorganic filler. By including the non-fibrous filler, the tracking resistance of the resulting molded article can be improved. The non-fibrous inorganic filler refers to a filler in a shape other than fiber, and is preferably a plate-like filler or a particulate filler. Examples of non-fibrous inorganic fillers include calcium carbonate, talc, mica, silica, kaolin, wollastonite, barium sulfate, zirconium silicate, clay, bentonite, hydrotalcite, calcium sulfate, barium carbonate, magnesium carbonate, magnesium sulfate, calcium silicate, alumina, glass beads, glass flakes, titanium oxide, zinc oxide, magnesium oxide, calcium titanate, magnesium titanate, barium titanate, zinc sulfide, calcium borate, and zinc borate. Preferably, the filler contains at least one selected from the group consisting of barium sulfate, talc, zinc borate, and calcium borate. More preferably, the filler contains barium sulfate and / or talc, and even more preferably, the filler contains barium sulfate. The inclusion of barium sulfate particularly improves the tracking resistance of the resin composition and tends to suppress a decrease in mechanical strength. Barium sulfate is an ionic crystalline compound consisting of barium ions and sulfate ions, and may be natural or synthetic. There are no particular limitations on the manufacturing method, crystalline form, or average particle size. The number-average primary particle size of barium sulfate is preferably 0.01 to 10 μm, more preferably 0.05 to 5 μm, and even more preferably 0.1 to 3 μm. A number-average primary particle size of 0.01 μm or more improves workability during the production of the resin composition, while a number-average primary particle size of 10 μm or less tends to improve the mechanical strength of the resulting molded product. The number-average primary particle size of barium sulfate is measured by measuring the primary particle diameters of 300 particles in a fixed direction using a transmission electron microscope (JEM-2100, manufactured by JEOL Ltd.) at a magnification of 100,000 times, taken at randomly varying fields of view, and then calculating the average value from the measured values.

[0054] As for barium sulfate, for example, crushed natural barite can be used as a naturally occurring substance, and as a synthetic substance, barium sulfate synthesized by a known synthesis method can be used.

[0055] The method for producing barium sulfate is not particularly limited, and it can be produced by known methods. However, examples of methods for obtaining fine particle barium sulfate include a method in which, when reacting an aqueous sodium sulfate solution with an aqueous barium sulfide solution, a specific metaphosphate is present in the aqueous sodium sulfate solution, and the molar ratio of sodium sulfate to barium sulfide is stoichiometrically excessive, and the reaction is carried out in this manner (Japanese Patent Laid-Open No. 47-31898); a method in which an aqueous barium sulfide solution and an aqueous sulfuric acid solution are continuously introduced into a reaction vessel such as a pump so that the barium sulfide concentration is in excess, and the reaction is carried out under stirring (Japanese Patent Laid-Open No. 57-51119); and a method in which an aqueous sulfuric acid solution and an aqueous barium salt solution are supplied separately and simultaneously to a spray device in an accurate stoichiometric ratio, and reacted, and the medium containing the resulting precipitate is concentrated in advance and then spray-dried (Japanese Patent Laid-Open No. 2-83211).

[0056] The moisture content of barium sulfate is preferably 1.5% by mass or less, more preferably 1% by mass or less, even more preferably 0.8% by mass or less, and particularly preferably 0.5% by mass or less. By setting the moisture content to 1.5% by mass or less, the hydrolysis resistance and mechanical properties of the resulting molded product tend to be further improved. The moisture content of barium sulfate is measured according to JIS K5101.

[0057] It is also preferable to surface treat barium sulfate with a surface treatment agent. The amount of the surface treatment agent is more preferably 0.1 to 6 parts by mass, even more preferably 0.5 to 5 parts by mass, and particularly preferably 1 to 4 parts by mass, per 100 parts by mass of barium sulfate. By setting the treatment amount to the above-mentioned lower limit or more, a sufficient surface treatment effect can be obtained, and the impact resistance of the resulting molded product can be further improved. Furthermore, setting the treatment amount to the above-mentioned upper limit or less is preferable because it improves the fluidity of the resin composition. The barium sulfate content in the surface-treated barium sulfate is measured according to JIS K5115.

[0058] Examples of surface treatment agents include known organic compounds and inorganic compounds, with inorganic compounds being preferred. For example, preferred inorganic compounds include inorganic oxides and hydroxides of aluminum, silicon, zirconium, cerium, and the like, such as aluminum hydroxide, alumina, silica, zirconia, zirconium hydroxide, zirconia hydrate, cerium oxide, cerium oxide hydrate, and cerium hydroxide. These inorganic compounds may also be hydrates. Among these, aluminum hydroxide and silica are preferred, and when silica is used, SiO ２ ・nH ２ It is particularly preferred that the organic compound is a silica hydrate represented by ##STR00001## Furthermore, as the organic compound, an amine compound is preferred, and more preferred examples include amine compounds such as monoethanolamine, diethanolamine, triethanolamine, and dichlorohexylamine. When barium sulfate is surface-treated, it may be surface-treated with an inorganic compound and then with an organic compound, and in particular, it is preferred to use one that is surface-treated with aluminum hydroxide and / or silica hydrate and then with an organic compound.

[0059] The thickness of the surface treatment layer is not particularly limited, but is preferably 0.05 to 0.5 μm, and more preferably 0.1 to 0.2 μm.

[0060] The content of the non-fibrous inorganic filler (preferably talc and / or barium sulfate, more preferably barium sulfate) in the resin composition of this embodiment is preferably 0.5 parts by mass or more, more preferably 3 parts by mass or more, even more preferably 4 parts by mass or more, even more preferably 6 parts by mass or more, even more preferably 8 parts by mass or more, and preferably 40 parts by mass or less, more preferably 35 parts by mass or less, even more preferably 30 parts by mass or less, even more preferably 20 parts by mass or less, and even more preferably 15 parts by mass or less, relative to 100 parts by mass of the polyalkylene terephthalate resin. By setting the content at or above the lower limit, the tracking resistance of the obtained molded article tends to be further improved. Furthermore, the elastic modulus of the obtained molded article can be further improved. Furthermore, the flame retardancy also tends to be further improved. Furthermore, by setting the content at or below the upper limit, the flame retardancy of the obtained molded article tends to be further improved. Furthermore, the flowability of the resin composition can be further improved. Furthermore, the toughness tends to be further improved, and the mechanical strength of the obtained molded article tends to be further improved. The resin composition of the present embodiment may contain only one type of non-fibrous filler, or may contain two or more types. When two or more types are contained, the total amount is preferably in the above range.

[0061] In the resin composition of the present embodiment, the total amount of the internal epoxide-containing epoxy compound and the non-fibrous inorganic filler, or the total amount of the epoxidized fatty acid ester and the non-fibrous inorganic filler, is preferably 2.5 to 40.0 parts by mass per 100 parts by mass of the polyalkylene terephthalate resin. By setting the content at or above the lower limit, tracking resistance, flame retardancy, and rigidity tend to be further improved. On the other hand, by setting the content at or below the upper limit, moist heat resistance, fluidity, strength, and in some cases flame retardancy tend to be further improved. The total amount of the hydroxylated fatty acid ester and non-fibrous inorganic filler is preferably 3.0 parts by mass or more, more preferably 5.0 parts by mass or more, even more preferably 10.0 parts by mass or more, still more preferably 12.0 parts by mass or more, and still more preferably 14.5 parts by mass or more, and is preferably 30.0 parts by mass or less, more preferably 25.0 parts by mass or less, still more preferably 20.0 parts by mass or less, still more preferably 18.0 parts by mass or less, and still more preferably 16.5 parts by mass or less, per 100 parts by mass of the polyalkylene terephthalate resin.

[0062] In the resin composition of the present embodiment, the ratio of the total content of the non-fibrous inorganic filler to the content of the epoxidized fatty acid ester, or the ratio of the total content of the non-fibrous inorganic filler to the content of the internal epoxide-containing epoxy compound (non-fibrous inorganic filler / epoxidized fatty acid ester, or internal epoxide-containing epoxy compound) is preferably 0.1 or more, more preferably 0.3 or more, even more preferably 0.5 or more, more preferably 0.7 or more, even more preferably 1.0 or more, still more preferably 1.5 or more, and even more preferably 1.8 or more, respectively. It is preferable that the viscosity index is 80 or less, more preferably 75 or less, even more preferably 50 or less, even more preferably 20 or less, even more preferably 15 or less, and even more preferably 10 or less, 8 or less, 6.0 or less, or 2.5 or less. By making the viscosity index equal to or greater than the lower limit, tracking resistance, productivity, and rigidity tend to be further improved. Flame retardancy also tends to be further improved. By making the viscosity index equal to or less than the upper limit, moist heat resistance, fluidity, and strength tend to be excellent. Furthermore, flame retardancy, particularly the effect of suppressing glowing time, tends to be excellent.

[0063] The resin composition of this embodiment can also be substantially free of inorganic hydrated compounds. By being substantially free of inorganic hydrated compounds, thermal stability tends to be further improved. "Substantially free of inorganic hydrated compounds" means that the content of inorganic hydrated compounds contained in the resin composition is less than 15% by mass of the content of non-fibrous inorganic filler contained in the resin composition, preferably less than 10% by mass, more preferably less than 7% by mass, even more preferably less than 5% by mass, even more preferably less than 3% by mass, and may even be less than 1% by mass.

[0064] <Other Components> In addition to the above, the resin composition of this embodiment may contain other components within the scope of the present invention. Examples of other components include thermoplastic resins (including elastomers) other than polyalkylene terephthalate resins, fibrous inorganic fillers, and resin additives other than those described above. Thermoplastic resins other than polyalkylene terephthalate resins may be crystalline or amorphous, and examples include polyolefin resins such as polyamide resins, polycarbonate resins, styrene-based resins, polyethylene resins, polypropylene resins, and cycloolefin resins, polyacetal resins, polyimide resins, polyphenylene sulfide resins, polyether ether ketone resins, polyetherimide resins, polyphenylene ether resins, acrylic resins, glycidyl methacrylate-modified resins, and elastomers.

[0065] The resin composition of the present embodiment may be configured to be substantially free of an amorphous resin. "Substantially free of an amorphous resin" means that the content of the amorphous resin in the resin composition is less than 10% by mass of the resin composition, preferably less than 7% by mass, more preferably less than 5% by mass, even more preferably less than 3% by mass, and may even be less than 1% by mass, or even less than 0.1% by mass or less than 0.01% by mass.

[0066] Other resin additives include stabilizers, release agents, colorants, fluorine-based resins, flame retardant aids, transesterification inhibitors, UV absorbers, nucleating agents, antistatic agents, antifogging agents, antiblocking agents, flow improvers, plasticizers, dispersants, antibacterial agents, etc. The total amount of resin additives is 0% by mass or more of the resin composition, preferably less than 10% by mass, more preferably less than 7% by mass, even more preferably less than 5% by mass, even more preferably less than 3% by mass, and even more preferably less than 1% by mass. In addition, the resin composition of this embodiment can be blended with additives described in paragraphs 0047 to 0103 of WO 2021 / 241471 within the scope of the present invention, the contents of which are incorporated herein by reference. In the resin composition of the present embodiment, the polyalkylene terephthalate resin, the flame retardant, the epoxidized fatty acid ester and / or the internal epoxide-containing epoxy compound, and, which are blended as necessary, the non-fibrous inorganic filler (preferably talc and / or barium sulfate, more preferably barium sulfate), the stabilizer, the release agent, the colorant, and the glass fiber preferably account for 95% by mass or more of the resin composition in total, more preferably 97% by mass or more, and even more preferably 99% by mass or more.

[0067] <<Fiber-like inorganic filler>> The resin composition of the present embodiment may contain a fibrous inorganic filler. The fibrous inorganic filler has the effect of improving the mechanical properties of the resin composition obtained by blending it with a resin, and a wide variety of commonly used fibrous inorganic fillers for reinforcing plastics can be used.

[0068] The fibrous inorganic filler may be short fiber or long fiber. The raw material of the fibrous inorganic filler may be inorganic such as glass, carbon (carbon fiber, etc.), alumina, boron, ceramic, metal (steel, etc.), or organic such as plant (including kenaf, bamboo, etc.), aramid, polyoxymethylene, aromatic polyamide, polyparaphenylene benzobisoxazole, ultra-high molecular weight polyethylene, etc., and glass is preferred.

[0069] The resin composition in this embodiment preferably contains glass fibers. The glass fibers are selected from glass compositions such as A-glass, C-glass, E-glass, R-glass, D-glass, M-glass, and S-glass, with E-glass (alkali-free glass) being particularly preferred. Glass fibers refer to fibrous materials having a circular or polygonal cross section when cut perpendicular to the longitudinal direction. The average fiber diameter of the glass fibers is typically 1 μm or more, preferably 5 μm or more, and typically 25 μm or less, preferably 17 μm or less, more preferably 13 μm or less, and even more preferably 9 μm or less. By setting the average fiber diameter to 1 μm or more, the moldability of the resin composition tends to be further improved. By setting the average fiber diameter to 25 μm or less, the appearance of the resulting structure tends to be improved, and the reinforcing effect also tends to be improved. The glass fibers may be monofilaments or multiple twisted monofilaments. In particular, by setting the average fiber diameter of the glass fibers to 9 μm or less, the balance between strength and rigidity tends to be highly balanced. The average fiber diameter of glass fibers is the number-average fiber diameter, and is the average value of the values ​​obtained by microscopic observation of 100 randomly selected fibers. The glass fibers may be in the form of glass roving, which is a continuous winding of single fibers or a plurality of twisted fibers; chopped strands cut to a length of 1 to 10 mm (i.e., glass fibers having a number-average fiber length of 1 to 10 mm); or milled fibers pulverized to a length of approximately 10 to 500 μm (i.e., glass fibers having a number-average fiber length of 10 to 500 μm). However, chopped strands cut to a length of 1 to 10 mm are preferred. Glass fibers of different forms can also be used in combination. Glass fibers having an irregular cross-sectional shape are also preferred. The irregular cross-sectional shape refers to a shape in which the flatness, expressed as the ratio of the major axis to the minor axis of a cross section perpendicular to the longitudinal direction of the fiber, is, for example, 1.5 to 10, preferably 2.5 to 10, more preferably 2.5 to 8, and particularly preferably 2.5 to 5. By using glass fibers with an aspect ratio within this range, the differences in mechanical strength, linear expansion coefficient, and molding shrinkage between the flow direction and the direction perpendicular to the flow direction of the molded body can be alleviated, which is particularly effective in reducing warpage.

[0070] The glass fiber may be surface-treated with, for example, a silane-based compound, an epoxy-based compound, a urethane-based compound, or the like, or may be oxidized, in order to improve its affinity with the resin component, as long as the properties of the resin composition in this embodiment are not significantly impaired.

[0071] The glass fiber used in this embodiment preferably has a modulus of elasticity of 80 GPa or more and / or a softening temperature of 880°C or more. The modulus of elasticity of the glass fiber is a value measured in accordance with ASTM-D2343. The modulus of elasticity of the glass fiber is preferably 85 GPa or more, and is preferably 110 GPa or less, and more preferably 105 GPa or less. Depending on the application, the modulus of elasticity of the glass fiber may be lower than 80 GPa, for example, 65 GPa or more, and preferably 70 GPa or more. Glass fibers having a modulus of elasticity of 80 GPa or more preferably contain substantially no boron element. "Substantially no boron element" means that the content of boron element among the components contained in the glass fiber is 10×10 －４ It is preferable that the content is less than 7×10 －４ It is more preferable that the content is less than 5×10 －４ It is more preferable that the content is less than 3×10 －４ It is more preferable that the content is less than 1×10 －４ The content may be less than % by mass. The glass fiber is preferred, and its temperature is preferably 1100°C or lower, more preferably 1000°C or lower. Depending on the application, the glass transition softening temperature may be lower than 900°C, or may be 700°C or higher, preferably 800°C or higher. The use of such glass fibers tends to further improve the rigidity and mechanical strength of the resulting molded article. In particular, the strength and elastic modulus of the resin composition, i.e., the epoxylated fatty acid ester, which tend to decrease when blended, tend to be highly balanced, which is preferred.

[0072] The resin composition in this embodiment preferably contains 10 parts by mass or more of the fibrous inorganic filler relative to a total of 100 parts by mass of the polyalkylene terephthalate resin, more preferably 20 parts by mass or more, even more preferably 30 parts by mass or more, and even more preferably 40 parts by mass or more. By making the amount equal to or greater than the lower limit, the mechanical strength of the resulting molded article tends to be further increased. Furthermore, the content of the fibrous inorganic filler is preferably 150 parts by mass or less, more preferably 100 parts by mass or less, even more preferably 70 parts by mass or less, and even more preferably 60 parts by mass or less, relative to a total of 100 parts by mass of the polyalkylene terephthalate resin. By making the amount equal to or greater than the lower limit, the mechanical strength of the resin composition tends to be further improved. Furthermore, by making the amount equal to or less than the upper limit, the appearance of the resulting molded article tends to be further improved.

[0073] The content of the fibrous inorganic filler in the resin composition in this embodiment is preferably 1% by mass or more, more preferably 5% by mass or more, even more preferably 10% by mass or more, and even more preferably 15% by mass or more, based on 100% by mass of the resin composition. The content of the fibrous inorganic filler in the resin composition is preferably 45% by mass or less, more preferably 40% by mass or less, even more preferably 35% by mass or less, and even more preferably 30% by mass or less. By setting the content at or above the lower limit, the mechanical strength tends to be further increased. By setting the content at or below the upper limit, the appearance of the resulting molded product tends to be further improved. The resin composition in this embodiment may contain only one type of fibrous inorganic filler, or may contain two or more types. When two or more types are contained, the total amount is preferably within the above range.

[0074] <<Stabilizer>> The resin composition of this embodiment may contain a stabilizer. By containing a stabilizer, a resin composition or a molded article having excellent thermal stability can be obtained. The stabilizer preferably contains one or more compounds selected from the group consisting of a thioether compound, a hindered phenol compound, and a phosphite compound, and more preferably contains a hindered phenol compound.

[0075] The thioether-based compound may be any conventionally known sulfur-containing compound, and among these, thioethers are preferred. By including the thioether-based compound in the resin composition of the present embodiment, the appearance of the molded article tends to be improved and color change tends to be suppressed. Specific examples include didodecylthiodipropionate, ditetradecylthiodipropionate, dioctadecylthiodipropionate, pentaerythritol tetrakis(3-dodecylthiopropionate), 2,2-bis{[3-(dodecylthio)-1-oxopropoxy]methyl}propane-1,3-diylbis[3-(dodecylthio)propionate], thiobis(N-phenyl-β-naphthylamine), 2-mercaptobenzothiazole, 2-mercaptobenzimidazole, tetramethylthiuram monosulfide, tetramethylthiuram disulfide, nickel dibutyldithiocarbamate, nickel isopropyl xanthate, and trilauryl trithiophosphite. Among these, 2,2-bis{[3-(dodecylthio)-1-oxopropoxy]methyl}propane-1,3-diylbis[3-(dodecylthio)propionate] is preferred. Commercially available products include "Seenox 412S" manufactured by Shipro Chemical Co., Ltd. and "ADK STAB AO-412S" manufactured by ADEKA Corporation.

[0076] Examples of hindered phenol compounds include pentaerythritol tetrakis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate), octadecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, thiodiethylenebis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate), pentaerythritol tetrakis(3-(3,5-di-neopentyl-4-hydroxyphenyl)propionate), and 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene. Of these, pentaerythritol tetrakis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate) and octadecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate are preferred. Commercially available products include those manufactured by ADEKA Corporation under the trade names "ADK STAB AO-60" and "ADK STAB AO-330."

[0077] The phosphite compound is preferably a compound represented by the formula: ２ O-P (OR ３ ) (OR ４ ) (wherein, R ２ , R ３ and R ４ are each a hydrogen atom, an alkyl group having 1 to 30 carbon atoms, or an aryl group having 6 to 30 carbon atoms, and R ２ , R ３ and R ４At least one of the groups is an aryl group having 6 to 30 carbon atoms. Examples of the phosphite compound include triphenyl phosphite, tris(nonylphenyl) phosphite, dilauryl hydrogen phosphite, triethyl phosphite, tridecyl phosphite, tris(2-ethylhexyl) phosphite, tris(tridecyl) phosphite, tristearyl phosphite, diphenyl monodecyl phosphite, monophenyl didecyl phosphite, diphenyl mono(tridecyl) phosphite, tetraphenyl dipropylene glycol diphosphite, tetraphenyl tetra(tridecyl)pentaerythritol tetraphosphite, hydrogenated bisphenol A phenol phosphite polymer, diphenyl hydrogen phosphite, 4,4'-butylidene-bis(3-methyl-6-tert-butylphenyl di(tridecyl) phosphite), tetra(tridecyl) 4,4'-isopropyl phosphate, tetra(tridecyl) ... propylidenediphenyl diphosphite, bis(tridecyl)pentaerythritol diphosphite, bis(nonylphenyl)pentaerythritol diphosphite, dilauryl pentaerythritol diphosphite, distearyl pentaerythritol diphosphite, tris(4-tert-butylphenyl)phosphite, tris(2,4-di-tert-butylphenyl)phosphite, hydrogenated bisphenol A pentaerythritol phosphite polymer, bis(2,4-di-tert-butylphenyl)pentaerythritol diphosphite, bis(2,6-di-tert-butyl-4-methylphenyl)pentaerythritol diphosphite, 2,2'-methylenebis(4,6-di-tert-butylphenyl)octyl phosphite, bis(2,4-dicumylphenyl)pentaerythritol diphosphite, and the like. Among these, bis(2,6-di-tert-butyl-4-methylphenyl)pentaerythritol diphosphite is preferred. An example of a commercially available product is "ADEKA STAB PEP-36" manufactured by ADEKA Corporation.

[0078] Other examples of stabilizers include the following: the descriptions in paragraphs 0067 to 0075 of JP-A-2021-063196, the descriptions in paragraphs 0046 to 0057 of JP-A-2018-070722, the descriptions in paragraphs 0030 to 0037 of JP-A-2019-056035, and the descriptions in paragraphs 0066 to 0078 of WO 2017 / 038949. The contents of these descriptions are incorporated herein by reference.

[0079] The content of the stabilizer in the resin composition of this embodiment is 0.01 parts by mass or more, preferably 0.05 parts by mass or more, more preferably 0.1 parts by mass or more, and even more preferably 0.3 parts by mass or more, relative to 100 parts by mass of the polyalkylene terephthalate resin. By ensuring that the content is equal to or greater than the lower limit, the effect of suppressing thermal degradation and oxidative degradation of the resin during melt-kneading, molding, and use as a molded product tends to be more improved, and discoloration of the resin tends to be more effectively suppressed. Furthermore, the upper limit of the stabilizer content is preferably 2.0 parts by mass or less, more preferably 1.5 parts by mass or less, and even more preferably 1.0 part by mass or less, relative to 100 parts by mass of the polyalkylene terephthalate resin. By ensuring that the content is equal to or less than the upper limit, adverse effects on appearance and physical properties due to aggregation of additives such as stabilizers can be effectively suppressed. The resin composition of this embodiment may contain only one type of stabilizer, or may contain two or more types. When two or more types are contained, it is preferable that the total amount is within the above range.

[0080] <<Release Agent>> The resin composition of this embodiment preferably contains a release agent. A wide variety of known release agents can be used as the release agent, and examples thereof include aliphatic carboxylic acid amides, aliphatic carboxylic acids, esters of aliphatic carboxylic acids and alcohols, aliphatic hydrocarbon compounds having a number average molecular weight of 200 to 15,000, and polysiloxane-based silicone oils.

[0081] Examples of aliphatic carboxylic acid amides include compounds obtained by the dehydration reaction of higher aliphatic monocarboxylic acids and / or polybasic acids with diamines. Preferred higher aliphatic monocarboxylic acids include saturated aliphatic monocarboxylic acids and hydroxycarboxylic acids having 16 or more carbon atoms, such as palmitic acid, stearic acid, behenic acid, montanic acid, and 12-hydroxystearic acid. Examples of polybasic acids include aliphatic dicarboxylic acids such as malonic acid, succinic acid, adipic acid, sebacic acid, pimelic acid, and azelaic acid; aromatic dicarboxylic acids such as phthalic acid and terephthalic acid; and alicyclic dicarboxylic acids such as cyclohexanedicarboxylic acid and cyclohexylsuccinic acid. Examples of diamines include ethylenediamine, 1,3-diaminopropane, 1,4-diaminobutane, hexamethylenediamine, metaxylylenediamine, tolylenediamine, paraxylylenediamine, phenylenediamine, and isophoronediamine. As the carboxylic acid amide compound, a compound obtained by polycondensation of stearic acid, sebacic acid, and ethylenediamine is preferred, and a compound obtained by polycondensation of 2 moles of stearic acid, 1 mole of sebacic acid, and 2 moles of ethylenediamine is more preferred. In addition to bisamide compounds obtained by reacting a diamine with an aliphatic carboxylic acid, such as N,N'-methylenebisstearamide or N,N'-ethylenebisstearamide, dicarboxylic acid amide compounds such as N,N'-dioctadecylterephthalamide can also be suitably used.

[0082] Examples of aliphatic carboxylic acids include saturated or unsaturated aliphatic mono-, di-, or tri-carboxylic acids. Aliphatic carboxylic acids also include alicyclic carboxylic acids. Among these, preferred aliphatic carboxylic acids are mono- or di-carboxylic acids having 6 to 36 carbon atoms, with saturated aliphatic mono-carboxylic acids having 6 to 36 carbon atoms being more preferred. Specific examples of such aliphatic carboxylic acids include palmitic acid, stearic acid, caproic acid, capric acid, lauric acid, arachic acid, behenic acid, lignoceric acid, cerotic acid, melissic acid, tetralinic acid, montanic acid, adipic acid, and azelaic acid.

[0083] In the ester of an aliphatic carboxylic acid and an alcohol, the same aliphatic carboxylic acid as used herein can be used. On the other hand, examples of the alcohol include saturated or unsaturated monohydric or polyhydric alcohols. These alcohols may have a substituent such as a fluorine atom or an aryl group. Among these, monohydric or polyhydric saturated alcohols having 30 or less carbon atoms are preferred, and aliphatic or alicyclic saturated monohydric alcohols or aliphatic saturated polyhydric alcohols having 30 or less carbon atoms are more preferred. Specific examples of such alcohols include octanol, decanol, dodecanol, stearyl alcohol, behenyl alcohol, ethylene glycol, diethylene glycol, glycerin, pentaerythritol, 2,2-dihydroxyperfluoropropanol, neopentylene glycol, ditrimethylolpropane, and dipentaerythritol. Specific examples of esters of aliphatic carboxylic acids and alcohols include beeswax (a mixture containing myricyl palmitate as a main component), stearyl stearate, behenyl behenate, stearyl behenate, glycerin monopalmitate, glycerin monostearate, glycerin distearate, glycerin tristearate, pentaerythritol monopalmitate, pentaerythritol monostearate, pentaerythritol distearate, pentaerythritol tristearate, pentaerythritol tetrastearate, and esters of montanic acid and polyfunctional alcohols.

[0084] Examples of aliphatic hydrocarbons having a number average molecular weight of 200 to 15,000 include liquid paraffin, paraffin wax, microcrystalline wax, polyethylene wax, Fischer-Tropsch wax, and α-olefin oligomers having 3 to 12 carbon atoms. Note that the aliphatic hydrocarbons herein also include alicyclic hydrocarbons. The number average molecular weight of the aliphatic hydrocarbons is preferably 5,000 or less.

[0085] Examples of polyolefin waxes include polyethylene wax, polypropylene wax, and polyethylene propylene wax, with polyethylene wax being preferred. The polyolefin wax may be unmodified or modified. Examples of modified polyolefin waxes include vinyl ester-modified polyolefin wax, acid-modified polyolefin wax, and oxidized polyolefin wax, with oxidized polyolefin wax being preferred. Oxidized polyolefin waxes have excellent compatibility with polyalkylene terephthalate resins and tend to effectively suppress mold deposits in the resulting resin composition.

[0086] Oxidized polyolefin waxes can be obtained by oxidizing the corresponding unmodified polyolefin wax. Examples of oxidized polyethylene waxes include Licowax (registered trademark) PED521, PED522, and PED121 manufactured by Clariant Chemicals; Ceridust (registered trademark) 3715, and the like. In addition to the above, commercially available polyolefin waxes can be found in paragraph 0028 of JP 2022-140470 A, the contents of which are incorporated herein by reference.

[0087] The weight-average molecular weight of the polyolefin wax is preferably 800 or more, more preferably 1,000 or more, even more preferably 1,500 or more, even more preferably 2,000 or more, and even more preferably 2,500 or more. By setting it to the lower limit or above, the glowing time tends to be further shortened. Furthermore, the weight-average molecular weight of the polyolefin wax is preferably 30,000 or less, more preferably 20,000 or less, even more preferably 15,000 or less, and even more preferably 10,000 or less. By setting it to the upper limit or below, the fluidity of the resin composition during molding tends to be further improved. The weight average molecular weight can be measured by GPC (gel permeation chromatography) using a Tosoh HLC-8320GPC EcoSEC, tetrahydrofuran as a solvent, three Shodex KF-G and KF-805L columns, and a KF-800D column at a column temperature of 40°C and a flow rate of 1.2 mL / min, and can be measured as a polystyrene-equivalent value detected with a detector (UV-8320) at a detection wavelength of 254 nm. When the resin composition in this embodiment contains two or more types of polyolefin waxes, the weight average molecular weight is the weight average molecular weight of the mixture.

[0088] The dropping point of the polyolefin wax is preferably 165° C. or less, more preferably 160° C. or less, even more preferably 155° C. or less, even more preferably 150° C. or less, even more preferably 145° C. or less, even more preferably 140° C. or less, even more preferably 135° C. or less, particularly more preferably 130° C. or less, and preferably 80° C. or more, more preferably 85° C. or more, even more preferably 85° C. or more, even more preferably 90° C. or more, and even more preferably 95° C. or more. The dropping point is the temperature at which the first drop of molten material falls from a standard cup with an opening of 2.8 mm when the polyolefin wax is heated to change from a solid to a liquid state.

[0089] As for the release agent, in addition to the above, the descriptions in paragraphs 0063 to 0077 of JP-A-2018-070722 and the descriptions in paragraphs 0090 to 0098 of JP-A-2019-123809 can be referred to, and the contents of these can be incorporated into this specification.

[0090] The resin composition of this embodiment preferably contains 0.01 parts by mass or more of the release agent relative to 100 parts by mass of the polyalkylene terephthalate resin, more preferably 0.1 parts by mass or more, and even more preferably 0.3 parts by mass or more. It is also preferable that the amount is 5 parts by mass or less, more preferably 4 parts by mass or less, even more preferably 3 parts by mass or less, even more preferably 2 parts by mass or less, and may even be 1 part by mass or less. By setting the amount to be equal to or greater than the lower limit, the releasability of the resulting molded article tends to be further improved. Furthermore, by setting the amount to be equal to or less than the upper limit, bleed-out of the resulting molded article can be effectively suppressed. The resin composition may contain only one type of release agent, or two or more types. When two or more types are contained, the total amount is preferably within the above range.

[0091] The resin composition of this embodiment may be substantially free of dimethyl silicone oil. While dimethyl silicone oil is effective as a flame retardant aid and mold release agent, it tends to easily produce low-molecular-weight cyclic siloxanes when heated, etc. Cyclic siloxanes easily form silica when exposed to electric arcs, which effectively prevents poor conduction when used in electrical and electronic contact parts and peripheral components. "Substantially free of dimethyl silicone oil" means that the content of dimethyl silicone oil contained in the resin composition is, for example, 1.5 parts by mass or less, preferably less than 1.0 parts by mass, per 100 parts by mass of polyalkylene terephthalate resin. Furthermore, the content of dimethyl silicone oil in the resin composition of this embodiment is preferably less than 1% by mass, more preferably less than 0.7% by mass, even more preferably less than 0.5% by mass, even more preferably less than 0.3% by mass, and may even be less than 0.1% by mass.

[0092] <<Colorant>> The resin composition of the present embodiment may contain a colorant. By including a colorant, it is possible to impart color to the molded article. The colorant may be a chromatic colorant or an achromatic colorant. Examples of chromatic colorants include red colorants, blue colorants, yellow colorants, green colorants, and orange colorants. In addition, the resin composition may be a black colorant composition obtained by mixing two or more colorants. As the chromatic colorant, it is also preferable to include an orange colorant and / or an orange colorant composition. An example of an orange colorant is the organic dye Macrolex Orange HT manufactured by LANXESS. Examples of colorants include inorganic pigments, organic pigments, and organic dyes. Examples of inorganic pigments include sulfide pigments such as carbon black, cadmium red, and cadmium yellow; silicate pigments such as ultramarine; oxide pigments such as zinc white, red iron oxide, chromium oxide, titanium oxide, iron black, titanium yellow, zinc-iron brown, titanium-cobalt green, cobalt green, cobalt blue, copper-chromium black, and copper-iron black; chromate pigments such as yellow lead and molybdate orange; and ferrocyanide pigments such as Prussian blue. Examples of organic pigments and organic dyes include phthalocyanine dyes and pigments such as copper phthalocyanine blue and copper phthalocyanine green; azo dyes and pigments such as nickel azo yellow; condensed polycyclic dyes and pigments such as thioindigo, perinone, perylene, quinacridone, dioxazine, isoindolinone, and quinophthalone; anthraquinone, heterocyclic, and methyl dyes and pigments. These may be used in combination of two or more types.

[0093] The colorant may be blended as a masterbatch using a thermoplastic resin. The content of the colorant in the masterbatch is preferably 10 to 70 mass%, more preferably 15 to 60 mass%, even more preferably 15 to 50 mass%, still more preferably 15 to 40 mass%, and even more preferably 15 to 35 mass%. The thermoplastic resin used in the masterbatch is preferably a polyester resin, more preferably a polybutylene terephthalate resin.

[0094] The content of the colorant in the resin composition of this embodiment (excluding the content of the resin used for masterbatching) is preferably 0.05 parts by mass or more, more preferably 0.1 parts by mass or more, even more preferably 0.2 parts by mass or more, and even more preferably 0.3 parts by mass or more, relative to 100 parts by mass of the polyalkylene terephthalate resin. It is also preferably 3 parts by mass or less, more preferably 2 parts by mass or less, even more preferably 1.5 parts by mass or less, and even more preferably 0.8 parts by mass or less. By setting the content at or above the lower limit, the coloring degree of the resin composition tends to be increased. Furthermore, by setting the content at or below the upper limit, the tracking resistance tends to be improved. For other colorants, specifically, the descriptions in paragraphs 0047 and 0052-0053 of WO 2017 / 038949 can be referred to, and the contents of these are incorporated herein by reference.

[0095] <<Fluorine-Based Resin>> The resin composition in this embodiment may contain a fluorine-based resin. Fluorine-based resins typically function as anti-dripping agents. Any known fluorine-containing polymer can be selected and used as the fluorine-based resin, with fluoroolefin resins being preferred. Examples of fluoroolefin resins include polymers and copolymers containing a fluoroethylene structure. Specific examples include difluoroethylene resin, tetrafluoroethylene resin, and tetrafluoroethylene / hexafluoropropylene copolymer resin. Among these, tetrafluoroethylene resin is preferred. As the fluoroethylene resin, a fluoroethylene resin having fibril-forming ability is preferred. Examples of fluoroethylene resins having fibril-forming ability include Teflon (registered trademark) 6J manufactured by DuPont-Mitsui Fluorochemicals Co., Ltd., and Polyflon (registered trademark) F201L and Polyflon F103 manufactured by Daikin Industries, Ltd.

[0096] Examples of aqueous dispersions of fluoroethylene resins include Teflon (registered trademark) 30J manufactured by DuPont-Mitsui Fluorochemicals, Fluon D-1 and M12 manufactured by Daikin Industries, Ltd., and TF1750 manufactured by Sumitomo 3M Limited. Fluoroethylene polymers having a multilayer structure obtained by polymerizing vinyl monomers can also be used as fluoropolymers. Specific examples include Metablen (registered trademark) A-3800 manufactured by Mitsubishi Rayon Co., Ltd.

[0097] When the resin composition of this embodiment contains a fluororesin, the content thereof is preferably 0.01 parts by mass or more, more preferably 0.05 parts by mass or more, even more preferably 0.1 parts by mass or more, and even more preferably 0.2 parts by mass or more, relative to 100 parts by mass of the polyalkylene terephthalate resin. By setting the content at or above the lower limit, the flammability of a molded article formed from the resin composition tends to be further improved. The upper limit is preferably 3 parts by mass or less, more preferably 2 parts by mass or less, and even more preferably 1 part by mass or less, relative to 100 parts by mass of the polyalkylene terephthalate resin. The resin composition of this embodiment may contain only one type of fluororesin, or may contain two or more types. When two or more types are contained, the total amount is preferably within the above range. The resin composition of this embodiment may also be configured to be substantially free of a fluororesin. "Substantially free" means that the amount of fluororesin contained in the resin composition is less than 0.01% by mass, more preferably less than 0.001% by mass, and even more preferably zero. In particular, the resin composition of this embodiment is highly valuable in that it contains a phosphorus-based flame retardant and a nitrogen-based flame retardant as flame retardants, and therefore does not contain a fluorine-based resin.

[0098] <Physical Properties of Resin Composition> The resin composition of this embodiment preferably has excellent flame retardancy. Specifically, the resin composition of this embodiment is molded into a 1.5 mm thick test piece, and the flame retardancy evaluated according to the UL-94 test preferably satisfies V-0.

[0099] The resin composition of the present embodiment preferably has excellent fluidity. Specifically, the resin composition of the present embodiment has a melt volume rate (MVR) of 10 cm at a measurement temperature of 250° C. and a measurement load of 5 kgf in accordance with ISO 1133. ３ / 10 minutes or more is preferable, and 15 cm ３ / 10 minutes or more is more preferable, and 20 cm ３ The upper limit of the MVR is not particularly limited, but for example, 80 cm ３ / 10 minutes or less is practical, 30 cm ３ When the resin composition contains glass fiber, the MVR is the MVR measured at a temperature of 250°C and a load of 5 kgf, and when the resin composition does not contain glass fiber, the MVR is the MVR measured at a temperature of 250°C and a load of 2.16 kgf.

[0100] The resin composition of this embodiment preferably exhibits a high flexural strength retention in a pressure cooker test (PCT). Specifically, the resin composition of this embodiment is molded into an ISO multipurpose test piece (4 mm thick) and placed under conditions of 121°C, 100% relative humidity, and 2 atm pressure for 75 hours, after which the flexural strength retention is preferably 45% or more. The upper limit of the flexural strength retention is usually 100% or less, and even if it is 90% or less, the required performance is sufficiently satisfied.

[0101] The resin composition of this embodiment preferably has excellent tracking resistance. Specifically, the resin composition is molded into a 3 mm thick plate-shaped test piece, and the tracking resistance measured in accordance with IEC 60112:2020 is preferably 400 V or more, more preferably 600 V or more. Furthermore, it is preferable that the resin composition satisfy the above tracking resistance while containing carbon black. In particular, it is preferable that the resin composition satisfy the above tracking resistance while containing a phosphorus-based flame retardant.

[0102] More specifically, in the resin composition of this embodiment, when the flame retardant contains a phosphorus-based flame retardant, the tracking resistance of a molded article formed from the resin composition, measured in accordance with IEC 60112:2020, is preferably 600 V or more. Furthermore, in the resin composition of this embodiment, when the flame retardant contains a halogen-based flame retardant, the tracking resistance of a molded article formed from the resin composition, measured in accordance with IEC 60112:2020, is preferably 400 V or more. The upper limit of the tracking resistance corresponds to the upper limit value of the measuring instrument, but the required performance is sufficiently satisfied even if it is, for example, 1000 V or less.

[0103] <Method for Producing Resin Composition> The resin composition of this embodiment can be produced by a conventional method for preparing a resin composition (e.g., pellets). Typically, the components and various optional additives are thoroughly mixed together and then melt-kneaded in a single-screw or twin-screw extruder. Alternatively, the resin composition of this embodiment can be prepared without premixing the components, or by premixing only a portion of the components, and feeding the mixture into an extruder using a feeder for melt-kneading. A masterbatch may be prepared by melt-kneading some of the components, such as the fibrous inorganic filler and colorant, with the thermoplastic resin to prepare a masterbatch, which may then be blended with the remaining components and melt-kneaded. In this embodiment, it is preferable to melt-knead the polyalkylene terephthalate resin, flame retardant, epoxidized fatty acid ester, and optional components. The fibrous inorganic filler (e.g., glass fiber) is preferably fed from a side feeder midway through the extruder cylinder. The epoxidized fatty acid ester may be fed alone into the extruder without premixing with other raw materials. At this time, if necessary, the epoxidized fatty acid ester may be preheated to about 30 to 100°C to reduce the viscosity of the epoxidized fatty acid ester before addition. The injection point may be either upstream or downstream of the extruder. The heating temperature during melt-kneading can usually be selected appropriately from the range of 220 to 300°C. If the temperature is too high, decomposition gases are likely to be generated, which tends to reduce productivity and reduce the flame retardancy and mechanical strength of the resin composition. Therefore, it is desirable to select a screw configuration that takes shear heat generation, etc. into consideration. The use of stabilizers or heat stabilizers is desirable to suppress decomposition during kneading and subsequent molding.

[0104] <Method for Manufacturing Molded Articles> The resin composition or pellets of this embodiment are molded according to known methods. The method for manufacturing molded articles is not particularly limited, and any molding method commonly used for resin compositions can be used. Examples include injection molding, ultra-high speed injection molding, injection compression molding, two-color molding, gas-assisted hollow molding, molding using an insulated mold, molding using a rapidly heated mold, foam molding (including supercritical fluid), insert molding, IMC (in-mold coating molding), extrusion molding, sheet molding, thermoforming, rotational molding, laminate molding, press molding, and blow molding. Of these, injection molding is preferred. For details of injection molding, see paragraphs 0113 to 0116 of Japanese Patent No. 6183822, the contents of which are incorporated herein by reference. Furthermore, the mold temperature during mold molding, such as injection molding, is preferably 40 to 150°C. The resulting molded article may be subjected to various secondary processes such as laser marking.

[0105] <Applications> The resin composition of this embodiment is used as a molded article formed from the resin composition or pellets. The applications of the resin composition and pellets are not particularly limited, and they can be widely used in applications requiring flame retardancy and hydrolysis resistance. Furthermore, they can be used in applications requiring tracking resistance and are suitable for high-insulation applications. For example, they can be widely used indoors and outdoors as materials for electrical and electronic devices, automotive materials, housing materials, and materials for manufacturing parts in other industrial fields. Examples include breakers, electromagnetic switches, various relay components, transformer components, sensor components, switch components, connector components, terminal components, actuator components, outlet components, socket components, plug components, capacitor components, resistor components, charging components, battery components, housing components, structural components, and insulating materials. They are particularly suitable for use as materials for components located near electrical contacts. Examples of automotive materials include lamp housings, reflectors, bezels, and extensions, connectors, ECU cases, housings for in-vehicle cameras and millimeter-wave radars, battery cases, and sensor housings. Examples of electrical and electronic components include various housings, display devices such as personal computers, game consoles and televisions, printers, copy machines, scanners, fax machines, electronic organizers and PDAs, electronic desk calculators, electronic dictionaries, cameras, video cameras, mobile phones, battery packs, drives and readers for recording media, mice, numeric keypads, CD players, MD players, portable radios and audio players, housings, covers, keyboards, buttons, switch members, casings for wattmeters, battery cases, battery transport trays, relays, sensors, actuators, terminal switches, and grill cooking equipment parts.

[0106] The present invention will be explained in more detail below with reference to examples. The materials, amounts used, ratios, treatment contents, treatment procedures, etc. shown in the following examples can be changed as appropriate without departing from the spirit of the present invention. Therefore, the scope of the present invention is not limited to the specific examples shown below. If the measuring instruments used in the examples are difficult to obtain due to discontinuation or the like, measurements can be made using other instruments with equivalent performance.

[0107] 1. Raw Materials The raw materials shown in Table 1 below were used. Of the above epoxy compounds 1 to 3, epoxy compounds 2 and 3 are epoxy compounds having an internal epoxide in the molecule, and correspond to epoxidized fatty acid esters.

[0108] Examples 1 to 21, Comparative Examples 1 to 12 <Compounds> The components shown in Table 1-1 or Table 1-2 were uniformly mixed in a tumbler mixer in the proportions shown in Tables 2 to 8 (each component in Tables 2 to 8 is shown in parts by mass), with the exception of glass fiber. The carbon black and antimony trioxide in Colorant 1 were blended as a high-concentration masterbatch based on PBT resin. The values ​​in Tables 2 to 8 indicate the amounts of each component in each masterbatch. That is, the values ​​are listed as the carbon black content and antimony trioxide content. The resulting mixture was fed into a twin-screw extruder ("TEX30α" manufactured by The Japan Steel Works, Ltd.) through the main feed port. The cylinder temperature of the first kneading section was set to 260°C, and glass fiber was fed through a side feeder. The resin composition was melt-kneaded under conditions of a cylinder set temperature of 220°C and a screw rotation speed of 200 rpm after adding the glass fiber, and then rapidly cooled in a water tank and pelletized using a pelletizer to obtain pellets of the resin composition.

[0109] <Compounding Properties> The compounding properties of the resin compositions were evaluated as follows. A: Compounding was possible continuously without any problems, and good pellets were produced at a high yield. B: During compounding, the resin outlet (die) of the extruder tended to become clogged due to gelation, etc., making the production state unstable, and although the yield was low, pellet production could be continued. C: Other than A and B above, for example, during compounding, the resin outlet (die) of the extruder became clogged due to gelation, making it impossible to continue production.

[0110] <Flame Retardancy> The pellets obtained by the above-mentioned production method were dried at 120°C for 4 hours, and then injection molded using an SE100DU injection molding machine manufactured by Sumitomo Heavy Industries, Ltd. under conditions of a cylinder temperature of 260°C, a mold temperature of 80°C, and a molding cycle of 30 seconds, to obtain test pieces for UL-94 combustion tests having a length of 125 mm, a width of 13 mm, and a thickness of 1.5 mm and a length of 125 mm, a width of 13 mm, and a thickness of 1.0 mm.

[0111] The flame retardancy was evaluated by conditioning the UL-94 combustion test specimen obtained by the above-mentioned method in a constant temperature and humidity chamber at a temperature of 23°C and a humidity of 50% for 48 hours, and then performing the flame retardancy evaluation in accordance with the Subject 94 (UL-94) test (combustion test for plastic materials for equipment parts) of Underwriters Laboratories.

[0112] <Tracking Resistance> The pellets obtained above were dried at 120°C for 6 hours just before the start of the process, and then molded into a flat plate-shaped test piece of 60 mm x 60 mm x 3.0 mm thick using an injection molding machine ("NEX-80" manufactured by Nissei Plastic Industrial Co., Ltd.) at a cylinder temperature of 260°C. The tracking resistance was measured in accordance with IEC 60112:2020 to determine the maximum voltage that could be applied in the range up to 600V.

[0113] <Melt Volume Rate> The melt volume rate (MVR) of the obtained resin composition was measured in accordance with ISO 1133 at a measurement temperature of 250°C and a measurement load of 5 kgf. The unit is cm ３ / 10 min.

[0114] <Flexural Properties> The pellets obtained above were dried at 120°C for 5 hours, and then injection-molded into ISO multipurpose test specimens (4 mm thick) using an injection molding machine (clamping force 85 T) manufactured by The Japan Steel Works, Ltd., at a cylinder temperature of 250°C and a mold temperature of 80°C. The flexural strength (unit: MPa) and flexural modulus (unit: MPa) of the ISO multipurpose test specimens (4 mm thick) were measured at a temperature of 23°C in accordance with ISO 178.

[0115] <Flexural strength and its retention rate after PCT treatment> The ISO multipurpose test specimens (thickness 4.0 mm) obtained above were treated for 25 hours, 50 hours, and 75 hours using a pressure cooker tester (ESPEC EH8-221M) under conditions of a temperature of 121°C, a relative humidity of 100%, and a pressure of 2 atm. After conditioning the specimens in an environment of 23°C and 50%, the flexural strength of each specimen was measured in the same manner as above (unit: MPa). The flexural strength retention rate was then calculated (unit: %). Flexural strength retention rate (%) = (flexural strength after PCT treatment / flexural strength without PCT treatment) × 100

[0116]

[0117]

[0118]

[0119]

[0120]

[0121]

[0122] The MVR of Comparative Example 2 was unmeasurable due to viscosity increase. As is clear from the above results, the resin composition of the present invention exhibited excellent flame retardancy, compoundability, fluidity, and hydrolysis resistance (Example *). Furthermore, it also exhibited excellent tracking resistance and mechanical strength. In contrast, when a compound commonly used in the technical field of the present invention (orthocresol novolac epoxy resin) was blended as the epoxy compound, even if pellets were somehow obtained amid unstable production, viscosity increased to the point where the MVR could not be measured (Comparative Example 2), or pellets could not be produced at all (Comparative Example 3). On the other hand, when no epoxy compound was blended, hydrolysis resistance was poor (Comparative Examples 1, 4, 5, 6, 9, 10, and 11). When no non-fibrous filler was included, tracking resistance and flame retardancy were poor (Comparative Examples 7, 9, and 10). When a phosphorus-based flame retardant was blended and the ratio of the epoxy compound having an internal epoxide to the non-fibrous filler exceeded the upper limit (Comparative Example 8), the moist heat resistance and fluidity were inferior to those of Examples 1 to 17, which contained a phosphorus-based flame retardant and the ratio was within the specified range. Furthermore, despite a high flexural modulus, the flexural strength was low, resulting in a poor balance between rigidity and strength. Furthermore, when a halogen-based flame retardant was blended and the ratio of the epoxy compound having an internal epoxide to the non-fibrous filler exceeded the upper limit (Comparative Example 12), the moist heat resistance and fluidity were inferior to those of Examples 18 to 21, which contained a halogen-based flame retardant and the ratio was within the specified range. Furthermore, despite a high flexural modulus, the flexural strength was low, resulting in a poor balance between rigidity and strength.

Claims

1. A resin composition comprising a polyalkylene terephthalate resin, a flame retardant, an epoxy compound having an internal epoxide in its molecule, and a non-fibrous inorganic filler, wherein the mass ratio of the content of the non-fibrous inorganic filler to the content of the epoxy compound having an internal epoxide in its molecule, non-fibrous inorganic filler / epoxy compound having an internal epoxide in its molecule, is 0.5 to 50.

2. A resin composition comprising a polyalkylene terephthalate resin, a flame retardant, an epoxidized fatty acid ester, and talc and / or barium sulfate, wherein the content of the epoxidized fatty acid ester is 0.5 to 20 parts by mass and the content of the talc and / or barium sulfate is 4 to 40 parts by mass per 100 parts by mass of the polyalkylene terephthalate resin.

3. A resin composition according to claim 2, wherein the content of epoxy compounds other than the epoxidized fatty acid ester is less than 10 mass% of the content of the epoxidized fatty acid ester, and the content of the nitrogen-based flame retardant is 19 mass parts or less per 100 mass parts of the polyalkylene terephthalate resin.

4. The resin composition according to claim 1, wherein the epoxy compound having an internal epoxide in the molecule is an epoxidized fatty acid ester, and the content of the epoxy compound having an internal epoxide in the molecule is 0.5 to 12 parts by mass per 100 parts by mass of the polyalkylene terephthalate resin.

5. The resin composition according to claim 1 or 4, wherein the epoxy compound having an internal epoxide in the molecule includes a compound represented by formula (A-1). (In formula (A-1), R １ and R ２ At least one of R is an alkyl group, a cycloalkyl group, an alkenyl group, or an aryl group; ３ and R ４ At least one of R is an alkyl group, a cycloalkyl group, an alkenyl group, or an aryl group. １ , R ２ , R ３ and R ４ Each group in the formula (I) may have a substituent, and the substituent may further have a substituent.

6. The resin composition according to claim 1, wherein the content of epoxy compounds other than the epoxidized fatty acid ester is less than 10 mass % of the content of the epoxidized fatty acid ester.

7. The resin composition according to claim 1, wherein the content of the nitrogen-based flame retardant in the flame retardant is 0 to 19 parts by mass per 100 parts by mass of the polyalkylene terephthalate resin.

8. The resin composition according to claim 1 or 2, wherein the polyalkylene terephthalate resin comprises a polybutylene terephthalate resin.

9. The resin composition according to claim 1 or 2, wherein the flame retardant comprises a phosphorus-based flame retardant.

10. The resin composition according to claim 1 or 2, wherein the flame retardant comprises a nitrogen-based flame retardant.

11. The resin composition according to claim 1 or 2, wherein the flame retardant comprises a halogen-based flame retardant.

12. The resin composition according to claim 1 or 2, wherein the flame retardant comprises aluminum diethylphosphinate.

13. The resin composition according to claim 1, wherein the epoxy compound having an internal epoxide in the molecule comprises an epoxidized vegetable oil.

14. The resin composition according to claim 1 or 2, further comprising glass fibers, the average fiber diameter of which is 5 to 9 μm.

15. A resin composition according to claim 1 or 2, further comprising glass fibers, the glass fibers having an elastic modulus of 80 GPa or more, and substantially free of boron element.

16. The resin composition according to claim 1 or 2, further comprising glass fibers, the glass fibers having a modified cross-sectional shape.

17. The resin composition according to claim 1, wherein the epoxy compound having an internal epoxide in its molecule is an epoxidized fatty acid ester, the content of the epoxy compound having an internal epoxide in its molecule is 0.5 to 12 parts by mass per 100 parts by mass of the polyalkylene terephthalate resin, the epoxy compound having an internal epoxide in its molecule comprises a compound represented by formula (A-1), the content of epoxy compounds other than the epoxidized fatty acid ester is less than 10% by mass of the content of the epoxidized fatty acid ester, the polyalkylene terephthalate resin comprises a polybutylene terephthalate resin, the epoxy compound having an internal epoxide in its molecule comprises an epoxidized vegetable oil, and further comprises glass fibers, the glass fibers having an average fiber diameter of 5 to 9 μm or a modulus of elasticity of 80 GPa or more, and substantially containing no boron element, or having an irregular cross-sectional shape. (In formula (A-1), R １ and R ２ At least one of R is an alkyl group, a cycloalkyl group, an alkenyl group, or an aryl group; ３ and R ４ At least one of R is an alkyl group, a cycloalkyl group, an alkenyl group, or an aryl group. １ , R ２ , R ３ and R ４ Each group in the formula (I) may have a substituent, and the substituent may further have a substituent.

18. A resin composition according to any one of claims 1 to 4, 6, 7, 13 and 17, wherein the content of dimethyl silicone oil is 1.5 parts by mass or less per 100 parts by mass of the polyalkylene terephthalate resin.

19. The resin composition according to any one of claims 1 to 4, 6, 7, 13 and 17, which is substantially free of inorganic hydrated compounds.

20. The resin composition according to any one of claims 1 to 4, 6, 7, 13 and 17, which is substantially free of an amorphous resin.

21. The resin composition according to any one of claims 1 to 4, 6, 7, 13 and 17, which is substantially free of fluorine-based resins.

22. The resin composition according to any one of claims 1 to 4, 6, 7, 13 and 17, wherein the flame retardant comprises a phosphorus-based flame retardant, and a molded article formed from the resin composition has a tracking resistance of 600 V or more as measured in accordance with IEC 60112:2020.

23. A resin composition according to any one of claims 1 to 4, 6, 7, 13, and 17, wherein the flame retardant comprises a halogen-based flame retardant, and a molded article formed from the resin composition has a tracking resistance of 400 V or more as measured in accordance with IEC 60112:2020.

24. Pellets of the resin composition according to any one of claims 1 to 4, 6, 7, 13 and 17.

25. A molded article molded from the resin composition according to any one of claims 1 to 4, 6, 7, 13 and 17.

26. A molded article formed from the pellets of claim 24.

Images