Resin composition, pellet, and molded article

Abstract

To provide a resin composition which is obtained by blending a recycled polyalkylene terephthalate resin with a recycled glass fiber and in which generation of gas is suppressed, and to provide a pellet and a molded article.SOLUTION: The resin composition according to the present disclosure contains a recycled polyalkylene terephthalate resin, an amorphous resin, and at least one type of recycled glass fibers, and the recycled glass fibers contain a total of 1 part by mass or more of sodium oxide and / or potassium oxide with respect to a total of 100 parts by mass of the glass fibers.SELECTED DRAWING: None

Description

[Technical Field]

[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. [Background technology]

[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, other electrical parts, machine parts, etc., because of their excellent mechanical strength, chemical resistance, electrical insulation properties, etc. Here, in order to improve the mechanical strength of polybutylene terephthalate resin, glass fibers (usually E-glass fibers) are sometimes blended into the polybutylene terephthalate resin (Patent Document 1, Patent Document 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-087234 [Patent Document 2] Japanese Patent Publication No. 2022-8175 Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, from the viewpoint of effective utilization of resources, the use of recycled products as various raw materials for resin compositions has been considered. Here, it has been found that when recycled glass fibers are blended with recycled polyalkylene terephthalate resin, gas may be generated during extrusion or the like. The present invention aims to solve these problems and to provide a resin composition comprising recycled polyalkylene terephthalate resin and recycled glass fiber, in which gas generation is suppressed, as well as pellets and molded products. [Means for solving the problem]

[0005] In light of the above-mentioned problems, the present inventors have conducted research and found that the above-mentioned problems can be solved by further blending an amorphous resin into a resin composition obtained by blending recycled A-glass fiber and / or C-glass fiber with a recycled polyalkylene terephthalate resin. Specifically, the above problems were solved by the following means. [1] A recycled polyalkylene terephthalate resin; an amorphous resin; Contains at least one recycled glass fiber, The recycled glass fiber contains sodium oxide and / or potassium oxide in a total amount of 1 part by mass or more per 100 parts by mass of the glass fiber. Resin composition. [2] The resin composition according to [1], wherein the recycled glass fibers include C glass fibers and / or A glass fibers. [3] The resin composition according to [1] or [2], wherein the amorphous resin includes a recycled product. [4] The resin composition according to any one of [1] to [3], wherein the amorphous resin comprises a polystyrene resin and / or a polycarbonate resin. [5] The resin composition according to any one of [1] to [4], wherein the proportion of recycled materials in the resin composition is 1 to 100 mass %. [6] The resin composition according to any one of [1] to [5], wherein the recycled polyalkylene terephthalate resin contains a recycled polybutylene terephthalate resin. [7] The resin composition according to any one of [1] to [6], wherein the recycled glass fiber contains C-glass fiber and / or A-glass fiber, the amorphous resin contains a recycled product, the amorphous resin contains a polystyrene resin and / or a polycarbonate resin, the proportion of recycled products in the resin composition is 1 to 100 mass%, and the recycled polyalkylene terephthalate resin contains a recycled polybutylene terephthalate resin. [8] Pellets of the resin composition according to any one of [1] to [7]. [9] A molded article molded from the resin composition according to any one of [1] to [7].

[10] A molded article molded from the pellets described in [8]. [Effects of the Invention]

[0006] According to the present invention, it is possible to provide a resin composition in which recycled glass fibers are blended with recycled polyalkylene terephthalate resin, in which gas generation is suppressed, as well as pellets and molded articles. DETAILED DESCRIPTION OF THE INVENTION

[0007] Hereinafter, an embodiment for carrying out the present invention (hereinafter simply referred to as "the present embodiment") will be described in detail. Note that the present embodiment is an example for explaining the present invention, and the present invention is not limited to only this embodiment. In this specification, the symbol "to" is used to mean that the numerical values ​​before and after it are included as upper and lower limits. "A to B" means that the range is A or more and B or less. In addition, any combination of the upper and lower limit values ​​of the numerical values ​​in this specification is an example of this embodiment. In this specification, various physical properties and characteristic values ​​are those at 23°C unless otherwise specified. If the measurement methods, etc. described in the standards shown in this specification change from year to year, they will be based on the standards in effect 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 will be based on the standards in effect at the time of abolition.

[0008] The resin composition of the present embodiment is characterized in that it contains at least one of a recycled polyalkylene terephthalate resin, an amorphous resin, and a recycled glass fiber, and the recycled glass fiber contains sodium oxide and / or potassium oxide in a total amount of 1 part by mass or more per 100 parts by mass of the glass fiber. By adopting such a configuration, it is possible to effectively suppress the generation of gas during extrusion. In other words, polyalkylene terephthalate resins tend to generate decomposition gases due to decomposition of terminal hydroxyl groups. Under these circumstances, the present inventors conducted research and found that the above problem could be solved by blending an amorphous resin with recycled glass fibers containing a certain amount of sodium oxide and / or potassium oxide. That is, it is presumed that the use of glass fibers with a high content of alkaline components as the glass fibers effectively inhibits the decomposition of terminal hydroxyl groups, thereby suppressing gas generation. Furthermore, it is presumed that the use of recycled polyalkylene terephthalate resin reduces the proportion of terminal hydroxyl groups that are likely to cause gas, thereby further suppressing gas generation. In addition, it is presumed that the blending of an amorphous resin relatively reduces the proportion of polyalkylene terephthalate resin.

[0009] Hereinafter, the embodiments of the present invention will be described in detail. However, the explanation of the constituent elements described below is an example of an embodiment of the present invention, and the present invention is not limited to these contents.

[0010] <Recycled polyalkylene terephthalate resin> The resin composition of the present embodiment contains a recycled polyalkylene terephthalate resin. Examples of recycled polyalkylene terephthalate resins include those obtained by material recycling in which molded articles of recovered used polyalkylene terephthalate resins are crushed, washed, and reused, and those obtained by chemical recycling (chemical decomposition method). In this embodiment, material recycled products are preferred. In this embodiment, recycled polyalkylene terephthalate resins that have undergone a large number of thermal histories can be used. Examples of thermal histories include melt-kneading, and thermoforming such as injection molding and extrusion molding. In this embodiment, polyalkylene terephthalate resins that have undergone 3 to 10 thermal histories can be used. Examples of such recycled products include connectors, home appliances, toothbrushes, textiles, miscellaneous goods, automobile parts, films, tubes, and other extruded parts, with automobile parts being preferred. In particular, it is preferable to include recycled connectors and home appliances. The resin composition of the present embodiment contains a polyalkylene terephthalate resin. In this embodiment, the recycled polyalkylene terephthalate resin preferably contains recycled polyethylene terephthalate resin and / or recycled polybutylene terephthalate resin, and more preferably contains at least recycled polybutylene terephthalate resin.

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

[0012] As the dicarboxylic acid compound constituting the recycled 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 recycled 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. Among 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 recycled 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, preferably 1,4-butanediol or ethylene glycol, and more preferably 1,4-butanediol.

[0018] The amount of terminal carboxyl groups in the recycled polyalkylene terephthalate resin (preferably recycled polybutylene terephthalate resin) may be appropriately selected and determined, but is typically 50 eq / ton or less, preferably 30 eq / ton or less, and preferably 1 eq / ton or more, more preferably 5 eq / ton or more, even more preferably 16 eq / ton or more, and even more preferably 20 eq / ton or more.

[0019] The amount of terminal carboxyl groups in the recycled polyalkylene terephthalate resin is measured by dissolving 0.5 g of the resin in 25 mL of benzyl alcohol and titrating it 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 during polymerization, such as the raw material charge ratio, polymerization temperature, and pressure reduction, or by reacting with a terminal blocking agent.

[0020] The intrinsic viscosity of the recycled polyalkylene terephthalate resin (preferably recycled polybutylene terephthalate resin) is preferably 0.50 dL / g or more, more preferably 0.60 dL / g or more, even more preferably 0.71 dL / g or more, even more preferably 0.80 dL / g or more, and even more preferably 0.85 dL / g or more. By setting the intrinsic viscosity at or above the lower limit, deterioration of physical properties such as strength tends to be effectively suppressed. Furthermore, the intrinsic viscosity of the recycled polyalkylene terephthalate resin (preferably recycled 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, and even more preferably 0.90 dL / g or less. By setting the intrinsic viscosity at or below the upper limit, deterioration of the fluidity of the resin composition tends to be effectively suppressed.

[0021] The intrinsic viscosity is measured by the following method. Recycled polyalkylene terephthalate resin pellets are dissolved in a mixed solvent of phenol / 1,1,2,2-tetrachloroethane (1 / 1 by mass) 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 time it takes for the sample solution and the solvent alone to fall is measured at 30°C, 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 / η0-1, where η is the time it takes for the sample solution to fall, η0 is the time it takes for the solvent alone to fall, C is the concentration of the sample solution (g / dL), and K H is Huggins' constant. K H was set to 0.33. The fully automatic solution viscometer used is manufactured by Shibayama Scientific Co., Ltd. When the resin composition of the present embodiment contains two or more recycled polyalkylene terephthalate resins, the intrinsic viscosity is the intrinsic viscosity of the mixture.

[0022] A preferred recycled polyalkylene terephthalate resin is one 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, and typical examples are recycled polybutylene terephthalate resin and recycled polyethylene terephthalate resin. These are preferably similar to homopolyesters, i.e., 95 mol % or more of the entire resin is composed of terephthalic acid components and 1,4-butanediol or ethylene glycol components. The recycled polyalkylene terephthalate resin is preferably a recycled polybutylene terephthalate resin and / or a recycled polyethylene terephthalate resin. In particular, the recycled polyalkylene terephthalate resin preferably contains recycled polybutylene terephthalate resin as a main component, and more than 50% by mass of the recycled polyalkylene terephthalate resin is preferably recycled polybutylene terephthalate resin. In this case, it is also preferable that the recycled polyethylene terephthalate resin is contained in an amount of less than 50% by mass.

[0023] Recycled polybutylene terephthalate resin can be produced by batch or continuous melt polymerization of a dicarboxylic acid component, primarily terephthalic acid, or an ester derivative thereof, with a diol component, primarily 1,4-butanediol. 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 stream or reduced pressure.

[0024] The recycled polybutylene terephthalate resin is preferably produced by a continuous melt polycondensation method of a dicarboxylic acid component mainly composed of terephthalic acid and a diol component mainly composed of 1,4-butanediol.

[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 recycled polybutylene terephthalate resin may be a polybutylene terephthalate resin modified by copolymerization (hereinafter, also referred to as "recycled modified polybutylene terephthalate resin"), and specific preferred copolymers 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 recycled modified polybutylene terephthalate resin, the proportion of the tetramethylene glycol component in the copolymer is preferably 3 to 40 mass%, more preferably 5 to 30 mass%, and even more preferably 10 to 25 mass%. When a dimer acid copolymerized polybutylene terephthalate resin is used as the recycled modified polybutylene terephthalate resin, the proportion of dimer acid components 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 recycled modified polybutylene terephthalate resin, the proportion of isophthalic acid components 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 recycled modified polybutylene terephthalate resins, polyester ether resins copolymerized with polytetramethylene glycol and isophthalic acid copolymerized polybutylene terephthalate resins are preferred.

[0028] The content of recycled polyalkylene terephthalate resin (preferably recycled polybutylene terephthalate resin) in the resin composition of this embodiment is preferably 30% by mass or more, more preferably 35% by mass or more, and even more preferably 40% by mass or more, based on 100% by mass of the resin composition. Depending on the application, etc., it may be 45% by mass or more or 50% by mass or less. Furthermore, the content of the recycled polyalkylene terephthalate resin is preferably 80% by mass or less, more preferably 70% by mass or less, and even more preferably 65% ​​by mass or less, and may be 60% by mass or less, depending on the application, etc. The resin composition of the present embodiment may contain only one recycled polyalkylene terephthalate resin (preferably a recycled polyalkylene terephthalate resin), or may contain two or more recycled polyalkylene terephthalate resins. When two or more recycled polyalkylene terephthalate resins are contained, the total amount is preferably within the above range.

[0029] <Amorphous resin> The resin composition of the present embodiment may contain an amorphous resin. The amorphous resin is not particularly limited in type, but is typically an amorphous thermoplastic resin, such as a styrene-based resin, a polycarbonate resin, an acrylic resin, or a modified polyphenylene ether resin, with a styrene-based resin and / or a polycarbonate resin being preferred. The amorphous resin used in this embodiment may be a virgin amorphous resin or a recycled amorphous resin, and preferably includes a recycled amorphous resin. Examples of recycled amorphous resins include those obtained by material recycling in which molded articles of recovered used amorphous resins are crushed, washed, and reused, and those obtained by chemical recycling (chemical decomposition method). In this embodiment, material recycled products are preferred. The virgin amorphous resin preferably accounts for 0 to 50 mass %, more preferably 0 to 30 mass %, and even more preferably 0 to 10 mass %, of the total amount of amorphous resin contained in the resin composition of this embodiment.

[0030] The mass ratio of the recycled polyalkylene terephthalate resin to the amorphous resin (preferably the recycled amorphous resin) in the resin composition of this embodiment is preferably 5:95 to 95:5. Furthermore, the proportion of the recycled polyalkylene terephthalate resin relative to 100 parts by mass of the total of the recycled polyalkylene terephthalate resin and the amorphous resin is preferably 5 parts by mass or more, more preferably 7 parts by mass or more, more preferably 10 parts by mass or more, more preferably 15 parts by mass or more, and even more preferably 20 parts by mass or more, and is preferably 90 parts by mass or less, more preferably 80 parts by mass or less, even more preferably 70 parts by mass or less, even more preferably 50 parts by mass or less, even more preferably 40 parts by mass or less, and may be 35 parts by mass or less.

[0031] The total amount of the recycled polyalkylene terephthalate resin and the amorphous resin in the resin composition of this embodiment is preferably 70% by mass or more, more preferably 75% by mass or more, even more preferably 80% by mass or more, and preferably 90% by mass or less, based on 100% by mass of the resin composition. The resin composition of the present embodiment may contain only one type of amorphous resin, or may contain two or more types. When two or more types are contained, the total amount is preferably in the above range.

[0032] <<Styrene-based resin>> The styrene-based resin used in this embodiment may be a virgin styrene-based resin or a recycled amorphous styrene-based resin, but is preferably a recycled styrene-based resin. Examples of polystyrene resins include homopolymers of styrene monomers, copolymers of styrene monomers and monomers copolymerizable with styrene monomers, etc. In the copolymer of a styrene monomer and a monomer copolymerizable with a styrene monomer, the styrene monomer preferably accounts for 50% by mass or more of the total monomers, more preferably 60% by mass or more, and preferably 100% by mass or less.

[0033] The styrene-based monomer means styrene and styrene having a substituent, and examples thereof include styrene, α-methylstyrene, p-methylstyrene, vinylxylene, ethylstyrene, dimethylstyrene, p-tert-butylstyrene, vinylnaphthalene, methoxystyrene, monobromostyrene, dibromostyrene, fluorostyrene, and tribromostyrene, with styrene and α-methylstyrene being more preferred, and styrene being particularly preferred. Furthermore, among the monomers constituting the styrene-based resin, examples of monomers other than the styrene-based monomers include (meth)acrylic acid ester-based monomers, maleimide-based monomers such as maleimide, N-methylmaleimide, and N-phenylmaleimide, α,β-unsaturated carboxylic acids and anhydrides thereof such as acrylic acid, methacrylic acid, maleic acid, maleic anhydride, phthalic acid, and itaconic acid, and rubbers such as butadiene.

[0034] The polystyrene resin used in this embodiment may contain a rubber-reinforced polystyrene resin. Specific examples of the rubber-reinforced polystyrene resin include acrylonitrile-styrene copolymer (AS resin), high impact polystyrene resin (HIPS), acrylonitrile-butadiene-styrene copolymer (ABS resin), acrylonitrile-acrylic rubber-styrene copolymer (AAS resin), acrylonitrile-styrene-acrylic rubber copolymer (ASA resin), acrylonitrile-ethylene propylene rubber-styrene copolymer (AES resin), and styrene-IPN type rubber copolymer.

[0035] The polystyrene resin used in this embodiment preferably contains a styrene-maleic acid polymer (preferably a styrene-maleic anhydride polymer). The styrene-maleic acid polymer acts as a compatibilizer between the recycled polyalkylene terephthalate resin and the polystyrene resin and / or rubber-reinforced polystyrene resin. As a result, the strength of the resulting molded article can be increased.

[0036] In this embodiment, the polystyrene resin preferably includes at least one selected from polystyrene resin (GPPS), acrylonitrile-styrene copolymer (AS resin), high impact polystyrene resin (HIPS), acrylonitrile-butadiene-styrene copolymer (ABS resin), acrylonitrile-acrylic rubber-styrene copolymer (AAS resin), acrylonitrile-styrene-acrylic rubber copolymer (ASA resin), and acrylonitrile-ethylene propylene rubber-styrene copolymer (AES resin), and more preferably includes high impact polystyrene resin (HIPS). Furthermore, from the viewpoint of heat resistance, polystyrene resin (GPPS) and acrylonitrile-styrene copolymer (AS resin) are more preferred.

[0037] <<Polycarbonate resin>> The polycarbonate resin used in this embodiment may be either a virgin polycarbonate resin or a recycled polycarbonate resin, but is preferably a recycled polycarbonate resin.

[0038] Polycarbonate resins are thermoplastic polymers or copolymers which may be branched and are obtained by reacting a dihydroxy compound or a small amount of a polyhydroxy compound with phosgene or a carbonic acid diester.

[0039] The dihydroxy compound used as the raw material is preferably an aromatic dihydroxy compound, substantially free of bromine atoms. Specific examples include 2,2-bis(4-hydroxyphenyl)propane (i.e., bisphenol A), tetramethylbisphenol A, bis(4-hydroxyphenyl)-p-diisopropylbenzene, hydroquinone, resorcinol, and 4,4-dihydroxydiphenyl, with bisphenol A being preferred. Compounds in which one or more tetraalkylphosphonium sulfonates are bonded to the above aromatic dihydroxy compounds can also be used.

[0040] Among the polycarbonate resins mentioned above, aromatic polycarbonate resins derived from 2,2-bis(4-hydroxyphenyl)propane or aromatic polycarbonate copolymers derived from 2,2-bis(4-hydroxyphenyl)propane and other aromatic dihydroxy compounds are preferred. Also, copolymers mainly composed of aromatic polycarbonate resins, such as copolymers with polymers or oligomers having a siloxane structure, may be used. Furthermore, two or more of the above-mentioned polycarbonate resins may be mixed and used.

[0041] To adjust the molecular weight of the polycarbonate resin, a monovalent aromatic hydroxy compound may be used, such as m- and p-methylphenol, m- and p-propylphenol, p-tert-butylphenol, and p-long-chain alkyl-substituted phenol.

[0042] The viscosity average molecular weight (Mv) of the polycarbonate resin is preferably 10,000 or more, more preferably 12,000 or more, even more preferably 13,000 or more, and particularly preferably more than 14,000. If a viscosity average molecular weight lower than 10,000 is used, the resulting resin composition is likely to have low mechanical strength such as impact resistance. Furthermore, Mv is preferably 60,000 or less, more preferably 40,000 or less, even more preferably 35,000 or less, even more preferably 30,000 or less, and may be 25,000 or less, or 20,000 or less. If it is higher than 60,000, the flowability of the resin composition may be poor, resulting in poor moldability.

[0043] In the present invention, the viscosity average molecular weight (Mv) of a polycarbonate resin is a value calculated from the intrinsic viscosity ([η]) obtained by measuring the viscosity of a methylene chloride solution of the polycarbonate resin at 25°C using an Ubbelohde viscometer, and then using the following Schnell viscosity formula: [η]=1.23×10 -4 Mv 0.83

[0044] The melt flow rate (MFR) of the polycarbonate resin, measured in accordance with JIS K7210 (temperature 300°C, load 1.20 kgf), is preferably 3 to 100 g / 10 min, more preferably 6 to 70 g / 10 min. When the MFR is in the above range, the effects of the present invention tend to be more effectively exhibited. The melt volume rate (MVR) of polycarbonate resin measured in accordance with JIS K7210 (temperature 300°C, load 1.20 kgf) is 0.5 to 20 cm 3 g / 10 min is preferable, and 1 to 10 cm 3 When the MVR is within the above range, the effects of the present invention tend to be more effectively exhibited.

[0045] The method for producing the polycarbonate resin is not particularly limited, and polycarbonate resins produced by either the phosgene method (interfacial polymerization method) or the melt method (ester interchange method) can be used. Also preferred is a polycarbonate resin produced by the melt method and then subjected to post-treatment to adjust the amount of terminal OH groups.

[0046] <Virgin crystalline thermoplastic resin> The resin composition of the present embodiment may or may not contain a virgin crystalline thermoplastic resin. An example of the virgin crystalline thermoplastic resin is a polyester resin, preferably a polyalkylene terephthalate resin, and more preferably a polyalkylene terephthalate resin. The virgin polyester resin preferably accounts for 0 to 50 mass %, more preferably 0 to 30 mass %, and even more preferably 0 to 10 mass %, of the recycled polyalkylene terephthalate resin content in the resin composition of this embodiment. The thermoplastic resins (crystalline thermoplastic resin and amorphous thermoplastic resin) contained in the resin composition of this embodiment preferably have a recycled content of 60 to 100 mass%, more preferably 70 to 100 mass%, even more preferably 80 to 100 mass%, still more preferably 90 to 100 mass%, and even more preferably 95 to 100 mass%.

[0047] <Recycled glass fiber> The resin composition of the present embodiment contains recycled glass fibers, and the recycled glass fibers contain sodium oxide and / or potassium oxide in a total amount of 1 part by mass or more per 100 parts by mass of the total glass fibers. By using such recycled glass fibers, gas generation from the resin composition can be effectively suppressed. The recycled glass fibers used in this embodiment contain sodium oxide and / or potassium oxide in a total amount of preferably 2 parts by mass or more, more preferably 5 parts by mass or more, and preferably 20 parts by mass or less, per 100 parts by mass of the total glass fibers.

[0048] The recycled glass fibers preferably contain C-glass fibers and / or A-glass fibers. A-glass is the most widely used glass and is an excellent recycled resource. Recycled glass fiber is contrasted with virgin glass fiber, and includes glass fiber that has been put on the market, as well as defective products and scraps that are produced during the manufacturing of glass fiber.

[0049] The recycled glass fibers preferably have a number-average fiber length of 0.5 to 10 mm, more preferably 1 to 5 mm. The use of glass fibers with such a number-average fiber length can further improve mechanical strength. The number-average fiber length is calculated from the measured values ​​obtained by randomly selecting glass fibers to be measured for fiber length from an image obtained by observation with an optical microscope and measuring the long sides of the fibers. The observation is performed at a magnification of 20x, and the number of fibers measured is 1,000 or more. This roughly corresponds to the cut length. The cross section of the recycled glass fiber may be any shape, such as a circle, an ellipse, an oval, a rectangle, a shape with semicircles on both short sides of a rectangle, a cocoon shape, etc., but a circle is preferred. Here, the circle includes not only a circle in the geometric sense but also what is normally called a circle in the technical field of this embodiment. The number-average fiber diameter of recycled glass fibers is preferably 4.0 μm or more, more preferably 4.5 μm or more, and even more preferably 5.0 μm or more. The upper limit of the number-average fiber diameter of recycled glass fibers is preferably 15.0 μm or less, more preferably 14.0 μm or less. Using glass fibers having a number-average fiber diameter in this range tends to produce molded products with superior mechanical strength. The number-average fiber diameter of recycled glass fibers is calculated from the measured values ​​obtained by randomly selecting glass fibers to be measured for fiber diameter from an image obtained by observation with an electron microscope, measuring the fiber diameter near the center, and then measuring the measured values. The observation is performed at a magnification of 1,000x, and the number of fibers measured is 1,000 or more. The number-average fiber diameter of recycled glass fibers having a cross section other than a circle is the number-average fiber diameter when converted into a circle with the same area as the cross section. The glass fibers used in this embodiment may be treated with a surface treatment agent or a sizing agent. When the glass fibers are treated with a surface treatment agent or a sizing agent, the content of the surface treatment agent and the sizing agent is preferably 0.01 to 1 mass % of the glass fibers.

[0050] In this embodiment, the total content of recycled glass fibers in the resin composition is preferably 1% by mass or more, more preferably 3% by mass or more, even more preferably 5% by mass or more, even more preferably 7% by mass or more, still more preferably 10% by mass or more, and preferably 40% by mass or less, more preferably 35% by mass or less, even more preferably 30% by mass or less, still more preferably 25% by mass or less, and still more preferably 20% by mass or less. By setting the content at or above the lower limit, the amount of gas generated tends to be effectively reduced. Meanwhile, by setting the content at or below the upper limit, the appearance of the molded article after moist heat treatment tends to be further improved. The resin composition of the present embodiment may contain only one type of recycled glass fiber, or may contain two or more types. When two or more types are contained, the total amount is preferably in the above range.

[0051] The resin composition of the present embodiment may or may not contain virgin glass fibers. The resin composition of this embodiment may be configured to be substantially free of virgin glass fibers. "Substantially free of virgin glass fibers" means that the content of virgin glass fibers in the resin composition of this embodiment is less than 10% by mass of the resin composition, preferably less than 5% by mass, and more preferably less than 1% by mass.

[0052] In particular, the resin composition of this embodiment may or may not contain E-glass fibers. E-glass fiber can be virgin glass fiber or recycled glass fiber. When the resin composition of the present embodiment contains E-glass fibers, the content thereof is preferably 10 to 20% by mass of the resin composition. Furthermore, when the resin composition of this embodiment contains E glass fiber, the amount is preferably 1 to 50 parts by mass, and more preferably 1 to 30 parts by mass, per 100 parts by mass of the total amount of glass fiber and / or A glass fiber contained in the resin composition. The resin composition of this embodiment may be configured to be substantially free of E-glass fibers. "Substantially free of E-glass fibers" means that the content of E-glass fibers in the resin composition of this embodiment is less than 10% by mass, preferably less than 5% by mass, and more preferably less than 1% by mass.

[0053] <Stabilizer> The resin composition of the present embodiment may contain a stabilizer (a light stabilizer and / or a heat stabilizer). The stabilizer preferably contains one or more compounds selected from the group consisting of thioether compounds, phosphorus compounds, hindered phenol compounds, and phosphite compounds, and more preferably phosphorus compounds and / or hindered phenol compounds. In this embodiment, it is also preferable to use two or more of the thioether-based compounds, hindered phenol-based compounds, and phosphite-based compounds in combination as needed.

[0054] 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 the thermal stability tends to be improved. 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 Shipro Chemicals' product name "Seenox 412S" and ADEKA's product name "Adekastab AO-412S."

[0055] Examples of phosphorus-based stabilizers include phosphorous acid, phosphoric acid, phosphorous acid esters (phosphites), trivalent phosphoric acid esters (phosphonites), and pentavalent phosphoric acid esters (phosphates), and among these, organic phosphite compounds, organic phosphonite compounds, and organic phosphate compounds are preferred.

[0056] The organic phosphate compound is preferably one of the following: Formula (R 1 O) 3-n P(=O)OH n (In the formula, R 1 are alkyl groups or aryl groups, and may be the same or different. n is an integer of 0 to 2. More preferably, R1 and long-chain alkyl acid phosphate compounds having 8 to 30 carbon atoms. Specific examples of the alkyl group having 8 to 30 carbon atoms include an octyl group, a 2-ethylhexyl group, an isooctyl group, a nonyl group, an isononyl group, a decyl group, an isodecyl group, a dodecyl group, a tridecyl group, an isotridecyl group, a tetradecyl group, a hexadecyl group, an octadecyl group, an eicosyl group, and a triacontyl group.

[0057] Examples of long-chain alkyl acid phosphates include octyl acid phosphate, 2-ethylhexyl acid phosphate, decyl acid phosphate, lauryl acid phosphate, octadecyl acid phosphate, oleyl acid phosphate, behenyl acid phosphate, phenyl acid phosphate, nonylphenyl acid phosphate, cyclohexyl acid phosphate, phenoxyethyl acid phosphate, and alkoxypolyethylene glycol acid phosphate. Acid phosphate, bisphenol A acid phosphate, dimethyl acid phosphate, diethyl acid phosphate, dipropyl acid phosphate, diisopropyl acid phosphate, dibutyl acid phosphate, dioctyl acid phosphate, di-2-ethylhexyl acid phosphate, dioctyl acid phosphate, dilauryl acid phosphate, distearyl acid phosphate, diphenyl acid phosphate, bisnonylphenyl acid phosphate, etc. Among these, octadecyl acid phosphate is preferred, and this is commercially available from ADEKA Corporation under the trade name "ADEKA STAB AX-71."

[0058] The organic phosphite compound is preferably a compound represented by the following formula: R 2 OP(OR 3 )(OR 4 ) (In the formula, R 2 , R 3 and R 4are 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 4 At least one of the groups is an aryl group having 6 to 30 carbon atoms.) Examples of the compound include compounds represented by the following formula:

[0059] Examples of organic phosphite compounds 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 ... Examples of the phosphate phosphite include propylidene diphenyl 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, and bis(2,4-dicumylphenyl)pentaerythritol diphosphite. Among these, bis(2,6-di-tert-butyl-4-methylphenyl)pentaerythritol diphosphite is preferred.

[0060] The organic phosphonite compound is preferably a compound represented by the following formula: R 5 -P(OR 6 )(OR 7 ) (In the formula, R 5 , R 6 and R7 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 5 , R 6 and R 7 At least one of the groups is an aryl group having 6 to 30 carbon atoms.) Examples of the compound include compounds represented by the following formula:

[0061] Examples of organic phosphonite compounds include tetrakis(2,4-di-iso-propylphenyl)-4,4'-biphenylene diphosphonite, tetrakis(2,4-di-n-butylphenyl)-4,4'-biphenylene diphosphonite, tetrakis(2,4-di-tert-butylphenyl)-4,4'-biphenylene diphosphonite, tetrakis(2,4-di-tert-butylphenyl)-4,3'-biphenylene diphosphonite, and tetrakis(2,4-di-tert-butylphenyl)-3,3'-biphenylene diphosphonite. tetrakis(2,6-di-iso-propylphenyl)-4,4'-biphenylene diphosphonite, tetrakis(2,6-di-n-butylphenyl)-4,4'-biphenylene diphosphonite, tetrakis(2,6-di-tert-butylphenyl)-4,4'-biphenylene diphosphonite, tetrakis(2,6-di-tert-butylphenyl)-4,3'-biphenylene diphosphonite, and tetrakis(2,6-di-tert-butylphenyl)-3,3'-biphenylene diphosphonite.

[0062] 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. Among 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 under the trade names "ADK STAB AO-60" and "ADK STAB AO-330," and those manufactured by BASF under the trade name "IRGANOX NOX 1010."

[0063] The phosphite compound is preferably a compound represented by the formula: R 2 OP(OR 3 )(OR 4 ) (In the formula, 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 4 At least one of the groups is an aryl group having 6 to 30 carbon atoms.) Examples of the compound include compounds represented by the following formula:

[0064] 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.

[0065] Other examples of stabilizers include the descriptions in paragraphs 0067 to 0075 of JP 2021-063196 A, paragraphs 0046 to 0057 of JP 2018-070722 A, paragraphs 0030 to 0037 of JP 2019-056035 A, and paragraphs 0066 to 0078 of WO 2017 / 038949 A. The contents of these descriptions are incorporated herein by reference.

[0066] The content of the stabilizer in the resin composition of this embodiment is preferably 0.01 parts by mass or more, more preferably 0.05 parts by mass or more, and even more preferably 0.1 parts by mass or more, per 100 parts by mass of the thermoplastic resin contained in the resin composition. By ensuring that the content is above the lower limit, the effect of suppressing thermal and oxidative degradation of the resin during melt-kneading, molding, and use as a molded product tends to be more improved, and heat resistance tends to be improved. Furthermore, the upper limit of the stabilizer content is preferably 1.0 parts by mass or less, more preferably 0.8 parts by mass or less, more preferably 0.6 parts by mass or less, even more preferably 0.5 parts by mass or less, and even more preferably 0.4 parts by mass or less, per 100 parts by mass of the thermoplastic resin contained in the resin composition. By ensuring that the content is below the upper limit, adverse effects on appearance and physical properties due to aggregation of additives such as stabilizers tend to be effectively suppressed, and discoloration of the resin composition tends to be suppressed. The resin composition of the present embodiment may contain only one stabilizer, or may contain two or more stabilizers. When two or more stabilizers are contained, the total amount is preferably in the above range.

[0067] <Flame retardant> The resin composition of the present embodiment preferably contains a flame retardant. The type of flame retardant is not particularly limited, and known flame retardants can be used, such as 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.). In this embodiment, one example of the flame retardant is a phosphorus-based flame retardant, another example is a nitrogen-based flame retardant, and yet another example is a halogen-based flame retardant.

[0068] <<Halogen-based flame retardants>> As the halogen-based flame retardant, a bromine-based flame retardant is more preferred. The type of brominated flame retardant is not particularly limited, but brominated phthalimide, brominated poly(meth)acrylate, brominated polycarbonate, brominated epoxy, and brominated polystyrene are preferred, and brominated epoxy is more preferred.

[0069] The brominated phthalimide is preferably one represented by formula (1). [ka] (In formula (1), D represents an alkylene group, an arylene group, or a group formed by combining two or more of -S(=O)2-, -C(=O)-, and -O-. i is an integer of 1 to 4.)

[0070] In formula (1), D represents a group consisting of a combination of two or more of an alkylene group, an arylene group, -S(=O)2-, -C(=O)-, and -O-; a group consisting of a combination of an alkylene group or an arylene group with at least one of -S(=O)2-, -C(=O)-, and -O- is preferred; a group consisting of a combination of an alkylene group or an arylene group with one of -S(=O)2-, -C(=O)-, and -O- is more preferred; and an alkylene group is even more preferred. The group consisting of a combination of an alkylene group and -O- is intended to include, for example, a combination of two alkylene groups and one -O- (the same applies to other combinations). The alkylene group represented by D is preferably an alkylene group having 1 to 6 carbon atoms, more preferably a methylene group, an ethylene group, a propylene group or a butylene group. The arylene group is preferably a phenylene group. i is an integer of 1 to 4, and is preferably 4.

[0071] Examples of the brominated phthalimide represented by formula (1) include N,N'-(bistetrabromophthalimide)ethane, N,N'-(bistetrabromophthalimide)propane, N,N'-(bistetrabromophthalimide)butane, N,N'-(bistetrabromophthalimide)diethyl ether, N,N'-(bistetrabromophthalimide)dipropyl ether, N,N'-(bistetrabromophthalimide)dibutyl ether, N,N'-(bistetrabromophthalimide)diphenylsulfone, N,N'-(bistetrabromophthalimide)diphenyl ketone, and N,N'-(bistetrabromophthalimide)diphenyl ether.

[0072] The brominated phthalimide represented by formula (1) is preferably a brominated phthalimide represented by formula (2). [ka] (In formula (2), i is an integer of 1 to 4.) i is an integer of 1 to 4, and is preferably 4.

[0073] The brominated poly(meth)acrylate is preferably a polymer obtained by polymerizing a bromine atom-containing benzyl (meth)acrylate alone, copolymerizing two or more types of bromine atom-containing benzyl (meth)acrylate, or copolymerizing the bromine atom with another vinyl monomer. The bromine atoms are attached to benzene rings, and the number of bromine atoms attached is preferably 1 to 5, and more preferably 4 to 5, per benzene ring.

[0074] Examples of benzyl acrylates containing bromine atoms include pentabromobenzyl acrylate, tetrabromobenzyl acrylate, tribromobenzyl acrylate, and mixtures thereof. Examples of benzyl methacrylates containing bromine atoms include methacrylates corresponding to the above-mentioned acrylates.

[0075] Specific examples of other vinyl monomers that can be copolymerized with the bromine atom-containing benzyl (meth)acrylate include acrylic acid esters such as acrylic acid, methyl acrylate, ethyl acrylate, butyl acrylate, and benzyl acrylate; methacrylic acid esters such as methacrylic acid, methyl methacrylate, ethyl methacrylate, butyl methacrylate, and benzyl methacrylate; unsaturated carboxylic acids or anhydrides thereof such as styrene, acrylonitrile, fumaric acid, and maleic acid; vinyl acetate; and vinyl chloride.

[0076] These are usually used in an equimolar amount or less, particularly preferably 0.5 times or less, of the amount of benzyl (meth)acrylate containing a bromine atom.

[0077] Furthermore, vinyl monomers such as xylene diacrylate, xylene dimethacrylate, tetrabromxylene diacrylate, tetrabromxylene dimethacrylate, butadiene, isoprene, and divinylbenzene can also be used, and these can usually be used in an amount of 0.5 times or less by mole relative to the bromine atom-containing benzyl acrylate or benzyl methacrylate.

[0078] The brominated poly(meth)acrylate is preferably a polymer obtained by polymerizing a bromine atom-containing (meth)acrylate monomer, particularly benzyl (meth)acrylate, alone or by copolymerizing two or more of them, or by copolymerizing them with other vinyl monomers. The bromine atoms are attached to the benzene ring, and the number of bromine atoms attached is preferably 1 to 5, more preferably 4 to 5, per benzene ring.

[0079] As the brominated poly(meth)acrylate, pentabromobenzyl poly(meth)acrylate is preferred because of its high bromine content.

[0080] The molecular weight of the brominated poly(meth)acrylate is optional and may be appropriately selected and determined, but the weight-average molecular weight (Mw) is preferably 3,000 or more, more preferably 10,000 or more, and even more preferably 15,000 or more. By setting the weight-average molecular weight at or above the lower limit, molded articles with higher mechanical strength tend to be obtained. Furthermore, the upper limit of the weight-average molecular weight (Mw) is preferably 100,000 or less, more preferably 80,000 or less, even more preferably 60,000 or less, even more preferably 50,000 or less, and even more preferably 35,000 or less. By setting the weight-average molecular weight at or below the upper limit, the flowability of the resin composition tends to be further improved.

[0081] The brominated polycarbonate preferably has a free bromine content of 0.05% by mass or more and preferably 0.20% by mass or less. By setting the content within these ranges, the heat resistance stability of the resin composition tends to be further improved. The brominated polycarbonate also preferably has a chlorine atom content of 0.001% by mass or more and preferably 0.20% by mass or less. By setting the content within these ranges, the mold corrosion resistance during molding tends to be further improved. Specifically, the brominated polycarbonate is preferably a brominated polycarbonate obtained from brominated bisphenol A, particularly tetrabromobisphenol A. Examples of the terminal structure include a phenyl group, a 4-t-butylphenyl group, and a 2,4,6-tribromophenyl group, and particularly, those having a 2,4,6-tribromophenyl group in the terminal group structure are preferred.

[0082] The average number of carbonate structural units in the brominated polycarbonate may be appropriately selected and determined, but is preferably 2-30, more preferably 3-15, and even more preferably 3-10.

[0083] The molecular weight of the brominated polycarbonate is optional and may be appropriately selected and determined, but preferably has a viscosity average molecular weight of 1,000 to 20,000, more preferably 2,000 to 10,000.

[0084] The brominated polycarbonate obtained from the above brominated bisphenol A can be obtained, for example, by a conventional method of reacting brominated bisphenol with phosgene. The end-capping agent includes an aromatic monohydroxy compound, which may be substituted with a halogen or an organic group.

[0085] Specific preferred examples of the brominated epoxy include bisphenol A type brominated epoxy compounds, such as tetrabromobisphenol A epoxy compounds and glycidyl brominated bisphenol A epoxy compounds.

[0086] The molecular weight of the brominated epoxy compound is optional and may be appropriately selected and determined. However, the weight average molecular weight (Mw) is preferably 3,000 or more, more preferably 10,000 or more, even more preferably 13,000 or more, even more preferably 15,000 or more, and even more preferably 18,000 or more. By setting the weight average molecular weight at or above the lower limit, molded articles with higher mechanical strength tend to be obtained. Furthermore, the upper limit of the weight average molecular weight (Mw) is preferably 100,000 or less, more preferably 80,000 or less, even more preferably 78,000 or less, even more preferably 75,000 or less, and even more preferably 70,000 or less. By setting the weight average molecular weight at or below the upper limit, the flowability of the resin composition tends to be further improved. The brominated epoxy compound preferably has an epoxy equivalent of 3,000 to 40,000 g / eq, more preferably 4,000 to 35,000 g / eq, and particularly preferably 10,000 to 30,000 g / eq.

[0087] Brominated epoxy oligomers can also be used in combination with the brominated epoxy. In this case, for example, by using an oligomer with an Mw of 5,000 or less in a proportion of about 50% by mass or less, flame retardancy, mold releasability, and flowability can be appropriately adjusted. The bromine atom content in the brominated epoxy compound is optional, but to provide sufficient flame retardancy, it is usually 10% by mass or more, preferably 20% by mass or more, and particularly preferably 30% by mass or more. The upper limit is 60% by mass, and preferably 55% by mass or less.

[0088] The brominated polystyrene preferably includes a brominated polystyrene containing a constitutional unit represented by formula (3). [ka] (In formula (3), t is an integer of 1 to 5, and n is the number of constitutional units.)

[0089] Brominated polystyrene may be produced by brominating polystyrene or by polymerizing brominated styrene monomers. However, polymerized brominated styrene is preferred because it contains a small amount of free bromine atoms. In formula (3), the CH group to which the brominated benzene is bonded may be substituted with a methyl group. Brominated polystyrene may also be a copolymer copolymerized with other vinyl monomers. Examples of vinyl monomers in this case include styrene, α-methylstyrene, (meth)acrylonitrile, methyl (meth)acrylate, butadiene, and vinyl acetate. Brominated polystyrene may be used alone or as a mixture of two or more types with different structures, and may contain units derived from styrene monomers with different bromine numbers in a single molecular chain.

[0090] Specific examples of brominated polystyrene include poly(4-bromostyrene), poly(2-bromostyrene), poly(3-bromostyrene), poly(2,4-dibromostyrene), poly(2,6-dibromostyrene), poly(2,5-dibromostyrene), poly(3,5-dibromostyrene), poly(2,4,6-tribromostyrene), poly(2,4,5-tribromostyrene), poly(2,3,5-tribromostyrene), and poly(4-bromo-α-methylstyrene). Examples of suitable styrene copolymers include poly(2,4-dibromostyrene), poly(2,4-dibromo-α-methylstyrene), poly(2,5-dibromo-α-methylstyrene), poly(2,4,6-tribromo-α-methylstyrene), and poly(2,4,5-tribromo-α-methylstyrene), and poly(2,4,6-tribromostyrene), poly(2,4,5-tribromostyrene), and polydibromostyrene and polytribromostyrene containing an average of 2 to 3 bromine groups in the benzene ring are particularly preferred.

[0091] The brominated polystyrene preferably has the number n (average degree of polymerization) of structural units in formula (3) of 30 to 1,500, more preferably 150 to 1,000, and particularly preferably 300 to 800. If the average degree of polymerization is less than 30, blooming is likely to occur, while if it exceeds 1,500, poor dispersion is likely to occur and mechanical properties are likely to deteriorate. The weight-average molecular weight (Mw) of the brominated polystyrene is preferably 5,000 to 500,000, more preferably 10,000 to 500,000, even more preferably 10,000 to 300,000, even more preferably 10,000 to 100,000, and even more preferably 10,000 to 70,000. In particular, in the case of the brominated polystyrene described above, the weight average molecular weight (Mw) is preferably 50,000 to 70,000, and in the case of brominated polystyrene obtained by polymerization, the weight average molecular weight (Mw) is preferably about 10,000 to 30,000. The weight average molecular weight (Mw) can be determined as a value converted into standard polystyrene by GPC measurement.

[0092] The content of the halogen-based flame retardant in the resin composition of this embodiment is preferably 1 part by mass or more, more preferably 3 parts by mass or more, even more preferably 5 parts by mass or more, even more preferably 7 parts by mass or more, even more preferably 9 parts by mass or more, relative to 100 parts by mass of the thermoplastic resin contained in the resin composition, and is preferably 40 parts by mass or less, more preferably 30 parts by mass or less, and even more preferably 20 parts by mass or less. By setting the content at or above the lower limit, the flame retardancy of the resulting molded article tends to be further improved. Meanwhile, 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 the present embodiment may contain only one halogen-based flame retardant, or may contain two or more halogen-based flame retardants. When two or more halogen-based flame retardants are contained, the total amount is preferably in the above range.

[0093] <<Phosphorus-based flame retardants>> Examples of phosphorus-based flame retardants include metal phosphinates, melamine polyphosphates, condensed phosphate esters, and phosphazene compounds, with metal phosphinates being preferred.

[0094] 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 portion represented by formula (4) or formula (5) and a metal ion of the cation portion is any of calcium, magnesium, aluminum, and zinc.

[0095] [ka] (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, and 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 3may 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 it has a substituent, it is preferably an alkyl group having 1 to 3 carbon atoms. It is also preferably 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 preferred. Also, in this embodiment, aluminum phosphinate is preferred.

[0096] 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, and calcium methanedi(methylphosphinate). Examples of suitable methyl phenyl phosphates include magnesium methane di(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. For details about the metal phosphinate, please refer to paragraphs 0052 to 0058 of WO 2010 / 010669, the contents of which are incorporated herein by reference. For further details of the phosphorus-based flame retardant, please refer to paragraphs 0064 to 0084 of International Publication No. 2021 / 241471, the contents of which are incorporated herein by reference.

[0097] 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 is 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 thermoplastic resin contained in the resin composition. By setting the content at or above the lower limit, the flame retardancy of the resulting molded article tends to be further improved. Meanwhile, 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 the present embodiment may contain only one phosphorus-based flame retardant, or may contain two or more phosphorus-based flame retardants. When two or more phosphorus-based flame retardants are contained, the total amount is preferably in the above range.

[0098] <<Nitrogen-based flame retardants>> Examples of the nitrogen-based flame retardant include aliphatic amine compounds, aromatic amine compounds, nitrogen-containing heterocyclic compounds, cyanide compounds, aliphatic amides, aromatic amides, urea, and thiourea. Examples of the aliphatic amine include ethylamine, butylamine, diethylamine, ethylenediamine, butylenediamine, triethylenetetramine, 1,2-diaminocyclohexane, and 1,2-diaminocyclooctane. Examples of aromatic amines include aniline and phenylenediamine, and examples of nitrogen-containing heterocyclic compounds include uric acid, adenine, guanine, 2,6-diaminopurine, 2,4,6-triaminopyridine, and triazine compounds. Examples of the cyanide compound include dicyandiamide, examples of the aliphatic amide include N,N-dimethylacetamide, and examples of the aromatic amide include N,N-diphenylacetamide.

[0099] 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, and diaminoisopropoxytriazine. The melamine cyanurate or melamine isocyanurate is preferably an adduct of cyanuric acid or isocyanuric acid with a triazine compound, and examples thereof include adducts having a composition usually of 1:1 (molar ratio), and in some cases of 1:2 (molar ratio).

[0100] 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.

[0101] 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 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, relative to 100 parts by mass of the thermoplastic resin contained in the resin composition. It is also preferably 19 parts by mass or less, more preferably 18 parts by mass or less, more preferably 16 parts by mass or less, even more preferably 14 parts by mass or less, even more preferably 13 parts by mass or less, and even more preferably 10 parts by mass or less. Depending on the application, it may be 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 resulting molded article tend to be further improved. By setting the content at or below the upper limit, the mechanical strength tends to be further improved, gelation during 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.

[0102] 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, even more preferably 25 parts by mass or more, and preferably 50 parts by mass or less, more preferably 40 parts by mass or less, and even more preferably 35 parts by mass or less, per 100 parts by mass of the thermoplastic resin contained in the resin composition. By setting the content at or above the lower limit, flame retardancy tends to be further improved. Meanwhile, by setting the content at or below the upper limit, mechanical strength tends to be further improved. The resin composition of the present embodiment may contain only one type of flame retardant, or may contain two or more types. When two or more types are contained, the total amount is preferably in the above range.

[0103] <Flame retardant synergist> The resin composition of the present embodiment may contain a flame retardant aid. When a flame retardant aid is contained, it is preferable to contain an antimony compound. The flame retardant aid (preferably an antimony compound) acts, for example, with a halogen-based flame retardant, and tends to synergistically improve flame retardancy. As the antimony compound, antimony trioxide (Sb2O3), antimony pentoxide (Sb2O5), sodium antimonate, etc. are preferred, and among these, antimony trioxide is particularly preferred.

[0104] In the resin composition of this embodiment, the antimony compound may be blended as a masterbatch with the crystalline thermoplastic resin, which makes it easier for the antimony compound to exist in the crystalline thermoplastic resin phase, improves thermal stability during melt-kneading and molding, prevents a decrease in impact resistance, and tends to reduce variations in flame retardancy and impact resistance. The content of the antimony compound in the masterbatch is preferably 20 to 90% by mass, more preferably 30% by mass or more, even more preferably 40% by mass or more, still more preferably 50% by mass or more, still more preferably 60% by mass or more, and particularly preferably 70% by mass or more.

[0105] The content of the flame retardant aid (preferably an antimony compound) in the resin composition of this embodiment is preferably 0.1 parts by mass or more, more preferably 1.0 parts by mass or more, even more preferably 2.0 parts by mass or more, and even more preferably 3.0 parts by mass or more, relative to 100 parts by mass of the thermoplastic resin contained in the resin composition of this embodiment. By ensuring that the content is equal to or greater than the above-mentioned lower limit, the flame retardancy of the resulting molded article is further improved. Furthermore, the upper limit of the content of the flame retardant aid (preferably an antimony compound) is preferably 20.0 parts by mass or less, more preferably 15.0 parts by mass or less, even more preferably 10.0 parts by mass or less, even more preferably 8.0 parts by mass or less, and even more preferably 7.0 parts by mass or less, relative to 100 parts by mass of the crystalline thermoplastic resin. By ensuring that the content is equal to or less than the above-mentioned upper limit, the mold releasability and impact resistance of the resulting molded article tend to be improved.

[0106] <Anti-drip agent> The resin composition of this embodiment may contain an anti-dripping agent. The anti-dripping agent is preferably polytetrafluoroethylene (PTFE), which has fibril-forming ability, disperses easily in the resin composition, and tends to bond resins together to form a fibrous material. The content of the anti-dripping agent is preferably 0.1 to 20 parts by mass relative to 100 parts by mass of the thermoplastic resin contained in the resin composition. By using an anti-dripping agent in an amount of 0.1 part by mass or more, a more sufficient flame retardancy effect is exhibited, while by using an amount of 20 parts by mass or less, the appearance of the obtained molded article tends to be improved. The content of the anti-dripping agent is more preferably 10 parts by mass or less, even more preferably 5 parts by mass or less, and even more preferably 3 parts by mass or less, relative to 100 parts by mass of the thermoplastic resin contained in the resin composition. The resin composition of the present embodiment may contain only one type of anti-dripping agent, or may contain two or more types. When two or more types are contained, the total amount is preferably in the above range.

[0107] <Coloring agent> The resin composition of the present embodiment may contain a colorant (dye and / or pigment). The colorant may be either a dye or a pigment, with pigments being preferred. The colorant may be either an organic colorant or an inorganic colorant, and may be either a chromatic colorant or an achromatic colorant. Examples of colorants include those described in paragraphs 0121 to 0123 of JP 2021-101020 A and paragraphs 0088 to 0090 of JP 2019-188393 A, the contents of which are incorporated herein by reference. The resin composition of this embodiment preferably contains carbon black. The type, raw material, and production method of the carbon black are not limited, and any of furnace black, channel black, acetylene black, ketjen black, etc. can be used. Of these, furnace black is preferred. There are no particular limitations on the number average particle size, but it is preferably about 5 to 60 nm.

[0108] DBP oil absorption of carbon black (unit: cm 3 / 100g) is 40~300cm 3 The upper limit is preferably 300 cm / 100 g. 3 / 100g or less is preferable, and 200cm 3 / 100g or less is more preferable, and 150cm 3 / 100g or less is more preferable, and 100cm 3 The lower limit may be 40 cm / 100 g or less. 3 / 100g or more is preferable, 50cm 3 / 100g or more is preferable, 60cm 3 By setting the value within the upper and lower limits, the appearance of the molded product tends to be improved. 3 / 100g) can be measured in accordance with JIS K6217. The number-average particle size of carbon black is preferably 5 to 60 nm. The upper limit is preferably 60 nm or less, more preferably 40 nm or less, even more preferably 30 nm or less, and even more preferably 25 nm or less. The lower limit is preferably 10 nm or more, more preferably 13 nm or more, even more preferably 16 nm or more, and even more preferably 19 nm or more. By keeping the size within the above upper and lower limits, the appearance of molded articles tends to be improved. The number-average particle size can be determined by obtaining a magnified image of an aggregate according to the procedure described in ASTM D3849 (Standard Test Method for Carbon Black - Morphological Characterization by Electron Microscopy), measuring the particle sizes of 3,000 unit constituent particles from this aggregate image, and then arithmetically averaging the particle sizes.

[0109] Carbon black is preferably mixed with a thermoplastic resin, preferably a polyester resin such as a polyalkylene terephthalate resin, or a polystyrene resin, in advance to form a masterbatch, which increases the dispersibility of the carbon black and tends to improve the appearance of molded articles. The concentration of carbon black in the masterbatch is preferably 10 to 40% by mass.

[0110] When the resin composition of this embodiment contains a colorant (preferably carbon black), 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 0.5 parts by mass or more, relative to 100 parts by mass of the thermoplastic resin contained in the resin composition. By setting the content at or above the lower limit, the coloring effect is more effectively exhibited. Furthermore, the upper limit of the content of the colorant is preferably 4 parts by mass or less, relative to 100 parts by mass of the thermoplastic resin contained in the resin composition. By setting the content at or below the upper limit, the mechanical strength of the obtained molded product tends to be further improved. The resin composition of the present embodiment may contain only one type of colorant, or may contain two or more types. When two or more types are contained, the total amount is preferably in the above range.

[0111] <Nucleating agent> The resin composition of the present embodiment may contain a nucleating agent to adjust the crystallization rate. The type of nucleating agent is not particularly limited, but may be an inorganic nucleating agent or an organic nucleating agent, with inorganic nucleating agents being more preferred. Examples of inorganic nucleating agents include talc, boron nitride, mica, kaolin, barium sulfate, sodium phosphate, silicon nitride, and molybdenum disulfide. Among these, talc, barium sulfate, sodium phosphate, and boron nitride are preferred, and talc is more preferred because it tends to increase the rigidity of the resin composition.

[0112] The organic nucleating agent is preferably an organic alkali metal salt, more preferably an alkali metal salt of an aromatic carboxylic acid or a fatty acid, and even more preferably an alkali metal salt (preferably a sodium salt or potassium salt, more preferably a sodium salt) of a fatty acid (preferably a fatty acid having 5 to 50 carbon atoms). Specific examples of the organic nucleating agent include ionomer, sodium benzoate, sodium palmitate, sodium stearate, sodium behenate, and sodium montanate, of which sodium stearate, sodium behenate, and sodium montanate are more preferred, and sodium montanate is even more preferred because it tends to provide a resin composition with a good balance between rigidity and toughness. The acid value of the nucleating agent used in this embodiment is preferably 10 mg / 1 g-KOH or less, and is preferably 0 mg / 1 g-KOH or more. The acid value is measured in accordance with JIS K 0070-1992.

[0113] When the resin composition of this embodiment contains a nucleating agent, the content thereof is preferably 0.01 parts by mass or more, more preferably 0.05 parts by mass or more, and even more preferably 0.1 parts by mass or more, relative to 100 parts by mass of the thermoplastic resin contained in the resin composition. Depending on the application, for example, in applications where mold releasability is particularly required, the content may be more preferably 0.15 parts by mass or more, and may even be 0.2 parts by mass or more. By ensuring that the content is equal to or greater than the above lower limit, the mold releasability and mechanical strength of the molded article tend to be improved. The upper limit of the content is preferably 10 parts by mass or less, more preferably 8 parts by mass or less, even more preferably 6 parts by mass or less, and even more preferably 4 parts by mass or less, per 100 parts by mass of the thermoplastic resin contained in the resin composition. By keeping the content below the upper limit, decomposition of the composition is suppressed, which tends to improve mechanical strength. In addition, the strength retention rate after a wet heat test tends to be high.

[0114] <Release agent> The resin composition of the present embodiment may contain a release agent. As the release agent, known release agents that are commonly used for polyester resins can be used. Among them, polyolefin-based compounds and fatty acid ester-based compounds are preferred because of their good alkali resistance, and polyolefin-based compounds are particularly preferred.

[0115] The polyolefin-based compound may be a compound selected from paraffin wax and polyethylene wax, and among them, those having a weight-average molecular weight of 700 to 10,000, more preferably 900 to 8,000, are preferred.

[0116] Examples of fatty acid ester compounds include fatty acid esters such as saturated or unsaturated monovalent or divalent aliphatic carboxylic acid esters, glycerin fatty acid esters, sorbitan fatty acid esters, and partially saponified products thereof. Among these, mono- or di-fatty acid esters composed of a fatty acid having 11 to 28 carbon atoms, preferably 17 to 21 carbon atoms, and an alcohol are preferred.

[0117] Examples of fatty acids include palmitic acid, stearic acid, caproic acid, capric acid, lauric acid, arachidic acid, behenic acid, lignoceric acid, cerotic acid, melissic acid, tetralinic acid, montanic acid, adipic acid, azelaic acid, etc. The fatty acid may also be alicyclic. Examples of alcohols 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 saturated monohydric or polyhydric alcohols having 30 or less carbon atoms are more preferred. Here, aliphatic includes alicyclic compounds. 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. The above ester compound may contain an aliphatic carboxylic acid and / or an alcohol as an impurity, and may be a mixture of a plurality of compounds.

[0118] Specific examples of fatty acid ester compounds include glycerin monostearate, glycerin monobehenate, glycerin dibehenate, glycerin-12-hydroxymonostearate, sorbitan monobehenate, pentaerythritol monostearate, pentaerythritol distearate, stearyl stearate, and ethylene glycol montanic acid ester.

[0119] When the resin composition of the present embodiment contains a mold release agent, the content thereof is preferably 0.1 parts by mass or more, more preferably 0.3 parts by mass or more, and 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 thermoplastic resin contained in the resin composition. By ensuring that the content is equal to or greater than the lower limit, the mold releasability and mechanical strength of the molded article tend to be improved.

[0120] <Other ingredients> The resin composition of the present embodiment may contain other components in addition to those described above, as necessary, as long as the desired physical properties are not significantly impaired. The other components may be contained alone or in any combination and ratio of two or more. Examples of other components include resin additives, fillers other than the above-mentioned glass fibers, and the like. Specific examples of resin additives include transesterification inhibitors, ultraviolet absorbers, antistatic agents, antifogging agents, antiblocking agents, flow improvers, plasticizers, and dispersants. The total amount of these other components is preferably 0% by mass or more and less than 10% by mass, more preferably 0% by mass or more and less than 5% by mass, and even more preferably 0% by mass or more and less than 3% by mass, based on 100% by mass of the resin composition. In the resin composition of this embodiment, the total of the recycled polyalkylene terephthalate resin, amorphous resin, and recycled glass fiber preferably accounts for 90% by mass or more of the resin composition, more preferably 95% by mass or more, and may even be 100% by mass. The proportion of recycled materials in the resin composition of this embodiment is preferably 1 to 100% by mass, more preferably 10 to 100% by mass, even more preferably 15 to 100% by mass, even more preferably 30 to 100% by mass, still more preferably 50 to 100% by mass, and even more preferably 70 to 100% by mass, preferably 75 to 100% by mass, preferably 85 to 100% by mass, and preferably 90 to 100% by mass. The recycled materials here include thermoplastic resin components such as polyalkylene terephthalate resins and amorphous resins, glass fibers, etc.

[0121] <Method of manufacturing 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, feeding the mixture into an extruder using a feeder and melt-kneading the mixture. For example, glass fibers are preferably fed into an extruder using a side feeder and melt-kneaded. Alternatively, a masterbatch may be prepared by melt-kneading some of the components with a thermoplastic resin, followed by blending the remaining components with the masterbatch and melt-kneading the resulting mixture. The thermoplastic resin to be used for the masterbatch is preferably a polyalkylene terephthalate resin, more preferably a polyalkylene terephthalate resin and / or a polyethylene terephthalate resin, and even more preferably a polyalkylene terephthalate resin.

[0122] <Method of manufacturing molded products> The resin composition or pellets of this embodiment are molded according to a known method. The method for producing the molded article is not particularly limited, and any molding method generally used for resin compositions can be used. Examples thereof include injection molding, ultra-high speed injection molding, injection compression molding, two-color molding, gas-assisted or other hollow molding, molding using a heat-insulating mold, molding using a rapid heating mold, foam molding (including supercritical fluid), insert molding, IMC (in-mold coating molding), extrusion molding, sheet molding, thermoforming, rotational molding, lamination molding, press molding, blow molding, etc., among which injection molding is preferred. For details of the injection molding method, please refer to the description in paragraphs 0113 to 0116 of Japanese Patent No. 6183822, the contents of which are incorporated herein by reference. Furthermore, the mold temperature during molding such as injection molding is preferably 40 to 150°C.

[0123] <Application> The resin composition of the present embodiment is used as a molded article formed from the resin composition or pellets. The resin composition and pellets can be used for a wide range of known applications. For example, they can be used indoors or outdoors as materials for electrical and electronic devices, automobiles, housing, and parts manufacturing in other industrial fields. More specifically, examples of the material include breakers, electromagnetic switches, various relay parts, transformer parts, sensor parts, switch parts, connector parts, terminal parts, actuator parts, outlet parts, socket parts, plug parts, capacitor parts, resistor parts, charging parts, battery parts, housing parts, structural parts, insulating parts, etc. In particular, the material can be suitably used as a material for parts located near electrical contacts. Automotive materials include lamp housings, reflectors, bezels, extensions, connectors, ECU cases, housings for in-vehicle cameras and millimeter-wave radars, battery cases, and sensor housings. Electrical and electronic components include various housings, display devices for personal computers, game consoles, televisions, etc., printers, copiers, scanners, fax machines, electronic organizers and PDAs, electronic desk calculators, electronic dictionaries, cameras, video cameras, mobile phones, battery packs, recording medium drives and readers, mice, numeric keypads, CD players, MD players, portable radios and audio players, housings, covers, keyboards, buttons, switch components, power meter casings, battery cases, battery transport trays, relays, sensors, actuators, terminal switches, and grill cooking equipment parts. [Example]

[0124] The present invention will be explained in more detail below with reference to examples. The materials, amounts used, ratios, processing details, processing procedures, etc. shown in the following examples can be appropriately changed 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.

[0125] 1.Raw materials The following raw materials were used: [Table 1]

[0126] 2. Example 1, Example 2, Comparative Examples 1 to 4 The components shown in Table 1 were mixed uniformly in a tumbler mixer in the proportions shown in Table 2 (each component in Table 2 is expressed in mass %), with the exception of the glass fiber. 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 the glass fiber was fed through a side feeder. The resin composition was melt-kneaded under conditions of a cylinder temperature setting of 220°C and a screw rotation speed of 200 rpm after the addition of the glass fiber, and then rapidly cooled in a water bath and pelletized using a pelletizer to obtain pellets of the resin composition.

[0127] <Molding of Test Specimens> The resin composition pellets obtained above were dried at 120°C for 5 hours, and then a JIS K7139 multipurpose test specimen (4 mm thick) was injection molded using an injection molding machine (J-85AD-60H) under the conditions of a cylinder temperature of 265°C and a mold temperature of 80°C. The obtained multipurpose test specimen (4 mm thick) was treated for 25 hours using a pressure cooker tester under the conditions of a temperature of 121°C, a relative humidity of 100%, and a pressure of 2 atm. The pressure cooker tester used was the ESPEC EH8-221M.

[0128] <Appearance after 25-hour PCT> Regarding the test specimens after the 25-hour treatment, the appearance was visually observed and evaluated as follows. A: The test specimens maintained a good appearance. B: Powdery substances were observed on the surface of the test specimens.

[0129] <Amount of Generated Gas (THF)> The amount of generated gas (THF) in the resin composition was measured according to the following method. The pellets of the resin composition were heated at 150°C for 10 minutes, and the obtained gas was analyzed. The gas analysis was performed by headspace gas chromatography analysis. The amount of generated gas (THF) was measured. The gas analysis was carried out using a Nexis GC-2030 manufactured by Shimadzu Corporation.

[0130]

Table 2

[0131] In Table 2 above, the recycling ratio means the ratio (%) of the recycled component in 100% by mass of the resin composition. As is clear from the above results, in the resin composition of this embodiment, the generation of gas could be effectively suppressed. Also, the appearance after heat treatment was excellent.

[0132] Although the present invention has been described in detail with reference to specific embodiments, it will be apparent to those skilled in the art that various modifications can be made without departing from the spirit and scope of the invention.

Claims

1. Recycled polyalkylene terephthalate resin; an amorphous resin; At least one recycled glass fiber is included, The recycled glass fiber contains sodium oxide and / or potassium oxide in a total amount of 1 part by mass or more per 100 parts by mass of the glass fiber. Resin composition.

2. The resin composition according to claim 1 , wherein the recycled glass fibers comprise C-glass fibers and / or A-glass fibers.

3. The resin composition according to claim 1 , wherein the amorphous resin comprises a recycled product.

4. The resin composition according to claim 1 or 3, wherein the amorphous resin comprises a polystyrene resin and / or a polycarbonate resin.

5. The resin composition according to claim 1 or 3, wherein the proportion of recycled materials in the resin composition is 1 to 100% by mass.

6. The resin composition according to claim 1 or 3, wherein the recycled polyalkylene terephthalate resin comprises a recycled polybutylene terephthalate resin.

7. the recycled glass fibers include C-glass fibers and / or A-glass fibers; The amorphous resin includes a recycled product, the amorphous resin comprises a polystyrene resin and / or a polycarbonate resin, The ratio of recycled materials in the resin composition is 1 to 100% by mass, The resin composition of claim 1 , wherein the recycled polyalkylene terephthalate resin comprises a recycled polybutylene terephthalate resin.

8. Pellets of the resin composition according to any one of claims 1, 3 and 7.

9. A molded article molded from the resin composition according to any one of claims 1, 3 and 7.

10. A molded article formed from the pellets according to claim 8.

Images