Resin composition, pellet, and molded article

Abstract

To provide a resin composition containing a polyalkylene terephthalate resin and a recycled polycarbonate resin, which is equivalent to a case using a virgin polycarbonate resin or can achieve better retention stability than that in a case using only a virgin polycarbonate resin, and a pellet and a molded article.SOLUTION: A resin composition contains 0.1 to 20 pts.mass of a reactive compound, with respect to 100 pts.mass of the total of a polyalkylene terephthalate resin and a polycarbonate resin, wherein a mass ratio of the polyalkylene terephthalate resin to the polycarbonate resin in 100 pts.mass of a total of the polyalkylene terephthalate resin and the polycarbonate resin is 10 / 90 to 90 / 10, the polycarbonate resin contains a recycled polycarbonate resin, and the recycled polycarbonate resin has a branching amount of 50 to 3,500 mass ppm.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a resin composition, a pellet, and a molded article. [Background technology]

[0002] 2. Description of the Related Art Conventionally, resin compositions containing a polyalkylene terephthalate resin, such as a polybutylene terephthalate resin, and a polycarbonate resin have been investigated (for example, Patent Document 1). Such resin compositions are widely used in electrical and electronic equipment parts, interior and exterior automotive parts, other electrical equipment parts, machine parts, and the like. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2021 / 186025 Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, from the viewpoint of reducing the environmental impact, the use of recycled products as thermoplastic resins has been considered. However, when recycled thermoplastic resins are used, the performance of the molded products obtained tends to be inferior. Under such circumstances, the present inventors have attempted to use recycled polycarbonate resin. Specifically, the present invention produces a resin composition containing a polyalkylene terephthalate resin and a recycled polycarbonate resin. However, it has been found that the addition of recycled polycarbonate resin may result in poor retention stability. The present invention aims to solve the above problems, and to provide a resin composition containing a polyalkylene terephthalate resin and a recycled polycarbonate resin, which is capable of achieving retention stability comparable to that achieved when virgin polycarbonate resin is used or better than that achieved when only virgin polycarbonate resin is used, as well as pellets and molded articles. [Means for solving the problem]

[0005] In view of the above problems, the present inventors have conducted research and found that the above problems can be solved by using a recycled polycarbonate resin having a branching amount of 50 to 3500 ppm by mass and blending a reactive compound. Specifically, the above problems were solved by the following means. <1> A resin composition comprising 0.1 to 20 parts by mass of a reactive compound per 100 parts by mass of a total of a polyalkylene terephthalate resin and a polycarbonate resin, a mass ratio of the polyalkylene terephthalate resin to the polycarbonate resin in the total 100 parts by mass of the polyalkylene terephthalate resin and the polycarbonate resin is 10 / 90 to 90 / 10, the polycarbonate resin contains a recycled polycarbonate resin, and the branching amount of the recycled polycarbonate resin is 50 to 3500 ppm by mass. <2> Further, the composition contains 0.01 to 2 parts by mass of an ester exchange inhibitor per 100 parts by mass of the polyalkylene terephthalate resin and the polycarbonate resin in total. <1> The resin composition according to claim 1. <3> The polyalkylene terephthalate resin includes a polybutylene terephthalate resin. <1> or <2> The resin composition according to claim 1. <4> The reactive compound comprises an epoxy compound. <1> ~ <3> 10. The resin composition according to claim 9 . <5> Further, the composition contains an ester exchange inhibitor in an amount of 0.01 to 2 parts by mass relative to 100 parts by mass in total of the polyalkylene terephthalate resin and the polycarbonate resin, the polyalkylene terephthalate resin contains a polybutylene terephthalate resin, and the reactive compound contains an epoxy compound. <1> ~ <4> 10. The resin composition according to claim 9 . <6> <1> ~ <5> 2. A pellet of the resin composition according to claim 1. <7> <1> ~ <5> 2. A molded article formed from the resin composition according to claim 1. <8> <6> A molded article formed from the pellets according to claim 1. Effect of the Invention

[0006] According to the present invention, it is possible to provide a resin composition containing a polyalkylene terephthalate resin and a recycled polycarbonate resin, which is capable of achieving retention stability comparable to that achieved when virgin polycarbonate resin is used or better than that achieved when only virgin polycarbonate resin is used, as well as pellets and molded articles. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0007] Hereinafter, an embodiment of 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 the present embodiment. In this specification, the use of "to" means that the numerical values ​​before and after it are included as the lower limit and upper limit. In this specification, various physical properties and characteristic values ​​are those at 23° C. unless otherwise specified.

[0008] In this specification, unless otherwise specified, the weight average molecular weight and number average molecular weight are polystyrene-equivalent values ​​measured by GPC (gel permeation chromatography) using a Tosoh HLC-8320GPC EcoSEC with tetrahydrofuran as a solvent and Shodex KF-G, KF-805L x 3, KF-800D columns at a column temperature of 40°C and a flow rate of 1.2 mL / min, and detected at a detection wavelength of 254 nm. If the measurement methods, etc. described in the standards shown in this specification vary from year to year, they will be based on the standards as of January 1, 2023, unless otherwise stated.

[0009] The composition is characterized in that it contains 0.1 to 20 parts by mass of a reactive compound per 100 parts by mass of the total of the polyalkylene terephthalate resin and the polycarbonate resin, the mass ratio of the polyalkylene terephthalate resin to the polycarbonate resin in the total 100 parts by mass of the polyalkylene terephthalate resin and the polycarbonate resin is 10 / 90 to 90 / 10, the polycarbonate resin contains recycled polycarbonate resin, and the branching amount of the recycled polycarbonate resin (recycled polycarbonate resin) is 50 to 3500 ppm by mass. By adopting such a configuration, it is possible to provide a resin composition containing a polyalkylene terephthalate resin and a recycled polycarbonate resin, which is capable of achieving retention stability comparable to that achieved when virgin polycarbonate resin is used, or better than that achieved when only virgin polycarbonate resin is used. Recycled polycarbonate resins are prone to contamination with polycarbonate resins having a branched structure, which tends to cause resin deterioration. In this embodiment, the reactive compound is blended to suppress resin deterioration. Furthermore, it is presumed that by setting the branch amount of the recycled polycarbonate resin to a specific amount or less, the increase in viscosity of the resin composition during retention of the resin composition can be suppressed even when the recycled polycarbonate resin is used. This is presumed to be because the ester exchange between the terminal hydroxyl group of the polycarbonate and the polyalkylene terephthalate resin can be effectively suppressed by reducing the branch amount.

[0010] <Polyalkylene terephthalate resin> The resin composition of the present embodiment contains a polyalkylene terephthalate resin. The polyalkylene terephthalate resin is a polyester obtained by, for example, polycondensation of terephthalic acid as a dicarboxylic acid compound and a diol, and may be either a homopolyester or a copolyester.

[0011] As the dicarboxylic acid compound constituting the polyalkylene terephthalate resin, a terphthalic acid compound or an ester-forming derivative thereof is preferably used. Aromatic dicarboxylic acids other than terephthalic acid can also be used in combination. Examples of such dicarboxylic acids 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-tert-phenylene-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.

[0012] In addition, one or more aliphatic dicarboxylic acids such as adipic acid, azelaic acid, dodecanedioic acid, and sebacic acid, and alicyclic dicarboxylic acids such as 1,2-cyclohexanedicarboxylic acid, 1,3-cyclohexanedicarboxylic acid, and 1,4-cyclohexanedicarboxylic acid can be mixed and used in small amounts together with terephthalic acid and the above-mentioned aromatic dicarboxylic acids.

[0013] Examples of dihydroxy compounds constituting the polyalkylene terephthalate resin include aliphatic diols such as ethylene glycol, propylene glycol, butanediol, hexylene glycol, neopentyl glycol, 2-methylpropane-1,3-diol, diethylene glycol, and triethylene glycol, alicyclic diols such as cyclohexane-1,4-dimethanol, and mixtures thereof. Among these, butanediol and ethylene glycol are particularly preferred.

[0014] In addition, 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. may be copolymerized. In addition, aromatic diols such as hydroquinone, resorcinol, naphthalene diol, dihydroxydiphenyl ether, and 2,2-bis(4-hydroxyphenyl)propane may also be used.

[0015] 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 may be used in combination to introduce a branched structure, or a monofunctional compound such as a fatty acid may be used in combination to adjust the molecular weight.

[0016] The polyalkylene terephthalate resin is preferably one that is mainly composed of polycondensation of terephthalic acid and diol, i.e., one that is composed of this polycondensate in an amount of 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, more preferably 1,4-butanediol and / or ethylene glycol, and more preferably 1,4-butanediol.

[0017] The amount of terminal carboxyl groups of the polyalkylene terephthalate resin (preferably polybutylene terephthalate resin) may be appropriately selected and determined, but is usually 60 eq / ton or less, preferably 50 eq / ton or less, and more preferably 30 eq / ton or less. By setting it to the upper limit or less, gas generation during melt molding of the resin composition tends to be more effectively suppressed, and hydrolysis resistance tends to be improved. The lower limit of the amount of terminal carboxyl groups is not particularly set, but is usually 3 eq / ton or more, preferably 5 eq / ton or more, and more preferably 10 eq / ton or more.

[0018] The amount of terminal carboxyl groups in the polyalkylene terephthalate resin is a value 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 such as the raw material charge ratio during polymerization, the polymerization temperature, and the pressure reduction method, or by reacting a terminal blocking agent.

[0019] The intrinsic viscosity of the polyalkylene terephthalate resin (preferably polybutylene terephthalate resin) is preferably 0.40 dL / g or more, more preferably 0.50 dL / g or more, even more preferably 0.55 dL / g or more, even more preferably 0.60 dL / g or more, and even more preferably 0.65 dL / g or more. By making it equal to or greater than the lower limit, there is a tendency that the deterioration of physical properties such as strength can be effectively suppressed. In addition, the intrinsic viscosity of the polyalkylene terephthalate resin (preferably polybutylene terephthalate resin) is preferably 1.2 dL / g or less, more preferably 1.1 dL / g or less, even more preferably 1.0 dL / g or less, and even more preferably 0.90 L / g or less. By making it equal to or less than the upper limit, there is a tendency that the deterioration of the fluidity of the resin during injection molding can be effectively suppressed.

[0020] The intrinsic viscosity is measured by the following method. Polyalkylene terephthalate resin pellets are dissolved in a mixed solvent of phenol / 1,1,2,2-tetrachloroethane (mass ratio 1 / 1) by stirring at 110°C for 1 hour to a concentration of 1.00 g / dL. The solution is then cooled to 30°C. The time it takes for the sample solution and the solvent alone to fall at 30°C is measured using a fully automatic solution viscometer, and the intrinsic viscosity is calculated using the formula: Intrinsic viscosity=((1+4K H η sp ) 0.5 -1) / (2K H C) Here, 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 a product of Shibayama Scientific Co., Ltd. When the resin composition of the present embodiment contains two or more types of polyalkylene terephthalate resins, the intrinsic viscosity is the intrinsic viscosity of the mixture.

[0021] The preferred 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 representative examples thereof are polybutylene terephthalate resin and polyethylene terephthalate resin. These are preferably close to homopolyesters, that is, 95 mol % or more of the entire resin is composed of terephthalic acid components and 1,4-butanediol or ethylene glycol components. The polyalkylene terephthalate resin is preferably a polybutylene terephthalate resin and / or a polyethylene terephthalate resin. Among them, the polyalkylene terephthalate resin preferably contains polybutylene terephthalate resin as a main component, and more than 50% by mass of the polyalkylene terephthalate resin is preferably polybutylene terephthalate resin. In this case, it is also preferable that the content of polyethylene terephthalate resin is less than 50% by mass.

[0022] Polybutylene terephthalate resin can be produced by batch or continuous melt polymerization of a dicarboxylic acid component mainly composed of terephthalic acid or an ester derivative thereof and a diol component mainly composed of 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-phase polymerization under a nitrogen stream or reduced pressure.

[0023] The polybutylene terephthalate resin is preferably produced by a continuous melt polycondensation process of a dicarboxylic acid component mainly composed of terephthalic acid and a diol component mainly composed of 1,4-butanediol.

[0024] The catalyst used in carrying out the esterification reaction may be a conventionally known catalyst, and examples thereof include titanium compounds, tin compounds, magnesium compounds, calcium compounds, etc. Among these, titanium compounds are particularly preferred. Specific examples of titanium compounds as esterification catalysts include titanium alcoholates such as tetramethyl titanate, tetraisopropyl titanate, and tetrabutyl titanate, and titanium phenolates such as tetraphenyl titanate.

[0025] The polybutylene terephthalate resin may be a polybutylene terephthalate resin modified by copolymerization (hereinafter, also referred to as a "modified polybutylene terephthalate resin"), and specific preferred copolymers include polyester ether resins copolymerized with polyalkylene glycols (particularly polytetramethylene glycol), dimer acid copolymerized polybutylene terephthalate resins, and isophthalic acid copolymerized polybutylene terephthalate resins.

[0026] When a polyester ether resin copolymerized with polytetramethylene glycol is used as the modified polybutylene terephthalate resin, the proportion of the tetramethylene glycol component in the copolymer is preferably 3 to 40 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 modified polybutylene terephthalate resin, the proportion of the dimer acid component in the total carboxylic acid components is preferably 0.5 to 30 mol %, more preferably 1 to 20 mol %, and even more preferably 3 to 15 mol %, in terms of carboxylic acid groups. When an isophthalic acid copolymerized polybutylene terephthalate resin is used as the modified polybutylene terephthalate resin, the proportion of 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 modified polybutylene terephthalate resins, polyester ether resins copolymerized with polytetramethylene glycol and isophthalic acid copolymerized polybutylene terephthalate resins are preferred.

[0027] The polyalkylene terephthalate resin used in this embodiment may or may not contain calcium element. In this embodiment, the concentration of calcium element in the polyalkylene terephthalate resin is preferably less than 0.80 mass ppm, and is preferably 0.6 mass ppm or less. The content of calcium element is measured according to the method for measuring the amount of metal elements in the examples described later.

[0028] The content of the polyalkylene terephthalate resin (preferably polybutylene terephthalate resin) in the resin composition of this embodiment is preferably 10 mass% or more, more preferably 20 mass% or more, even more preferably 30 mass% or more, and even more preferably 40 mass% or more, and is preferably 60 mass% or less, and more preferably 50 mass% or less, based on 100 mass% of the resin composition. The resin composition of the present embodiment may contain only one type of polyalkylene terephthalate resin (preferably polybutylene terephthalate resin), or may contain two or more types. When two or more types are contained, the total amount is preferably within the above range.

[0029] <Polycarbonate resin> The resin composition of the present embodiment contains a polycarbonate resin. Polycarbonate resin is a homopolymer or copolymer obtained by reacting a dihydroxy compound or a small amount of a polyhydroxy compound with phosgene or a carbonic acid diester. The method for producing the polycarbonate resin is not particularly limited, and polycarbonate resins produced by the conventionally known phosgene method (interfacial polymerization method) or melting method (ester exchange method) can be used. By using a polycarbonate resin obtained by the melting method, the polycarbonate resin tends to have a branched structure more easily. Also, in the interfacial polymerization method, a branching agent can be used during polymerization of the polycarbonate resin to obtain a polycarbonate resin having a branched structure.

[0030] The dihydroxy compound as the raw material is preferably an aromatic dihydroxy compound, more preferably bisphenol, and even more preferably bisphenol A. In addition, a compound in which one or more tetraalkylphosphonium sulfonates are bonded to the above aromatic dihydroxy compound can also be used.

[0031] In this embodiment, it is preferable that 90% by mass or more of the dihydroxy compound, which is the raw material monomer, is a polycarbonate resin derived from bisphenol A, and more preferably 95% by mass or more of the polycarbonate resin derived from bisphenol A. The constitutional units represented by the formulas (C1) to (C4) described later are also derived from bisphenol A, and are produced, for example, when polycarbonate is polymerized (melt method) by transesterification of bisphenol A and diphenyl carbonate, by a transition reaction (Fries transition) occurring in the polymerization reaction system. The constitutional units represented by the formulas (C1) to (C4) described later are also produced by the Fries transition of the polycarbonate resin derived from bisphenol A due to photodegradation caused by ultraviolet rays or the like. Two or more kinds of polycarbonate resins may be mixed and used.

[0032] In order 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.

[0033] The polycarbonate resin used in the present embodiment includes a polycarbonate resin derived from recycling (recycled polycarbonate resin). Examples of recycled polycarbonate resins include those obtained by material recycling in which recovered used polycarbonate resin moldings are crushed, washed, and reused, and those obtained by chemical recycling (chemical decomposition method), and those obtained by material recycling are preferred. Chemical recycling involves chemically decomposing the collected used polycarbonate resin molded bodies and returning them to the raw material level to resynthesize polycarbonate resin, while material recycling involves, for example, removing foreign matter from the collected used polycarbonate resin molded bodies, pulverizing them, washing them with an alkali, drying them, and pulverizing them into flakes or pelletizing them with an extruder. In addition, polycarbonate resin that is not a recycled polycarbonate resin is called virgin polycarbonate resin.

[0034] Examples of recycled polycarbonate resins include polycarbonate resins derived from bottles, polycarbonate resins derived from disks, sheets (including polycarbonate resins derived from films), polycarbonate resins derived from meter covers (e.g., power meter covers), and polycarbonate resins derived from headlamp lenses, and at least one of the polycarbonate resins derived from bottles, the polycarbonate resins derived from sheets, and the polycarbonate resins derived from headlamp lenses is preferred.

[0035] Examples of recycled polycarbonate resins include post-consumer recycled (PCR) products, which are made by collecting and recycling used products on the market, and post-industrial recycled (PIR) products, which are made by recycling materials generated in the manufacturing process of products before they are released on the market. Either may be included in this embodiment, but it is more preferable to include post-consumer recycled products from the viewpoint of reducing the environmental burden.

[0036] The recycled polycarbonate resin used in this embodiment preferably contains 10 to 150 ppm by mass of bisphenol A. The content of bisphenol A in the recycled polycarbonate resin is preferably 15 ppm by mass or more, more preferably 20 ppm by mass or more, and even more preferably 25 ppm by mass or more. It is also preferably 110 ppm by mass or less, more preferably 95 ppm by mass or less, more preferably 80 ppm by mass or less, even more preferably 60 ppm by mass or less, even more preferably 40 ppm by mass or less, even more preferably 35 ppm by mass or less, and particularly more preferably 30 ppm by mass or less. By making it equal to or more than the lower limit, the flowability and availability of the recycled polycarbonate resin tend to be improved. In addition, by making it equal to or less than the upper limit, it tends to be possible to suppress transesterification and thickening due to reactive compounds during retention, and the amount of generated gas tends to be reduced. In addition, from the viewpoint of the balance between the availability, ease of production, and quality stability of the recycled polycarbonate resin, it is preferable to make it within the upper and lower limits. The content of bisphenol A in the recycled polycarbonate resin is measured according to the description in the Examples section described later.

[0037] The branching amount of the recycled polycarbonate resin used in this embodiment is 50 to 3500 mass ppm. The branching amount of the recycled polycarbonate resin is preferably 100 mass ppm or more, more preferably 200 mass ppm or more, even more preferably 500 mass ppm or more, even more preferably 1000 mass ppm or more, even more preferably 1500 mass ppm or more, even more preferably 2000 mass ppm or more, and preferably 3000 mass ppm or less, more preferably 2500 mass ppm or less. By making it equal to or more than the lower limit, the availability of recycled polycarbonate tends to improve. In addition, by making it equal to or less than the upper limit, transesterification is suppressed, and thickening due to reactive compounds during retention tends to be suppressed. The branching amount of the recycled polycarbonate resin is measured according to the description in the Examples section described later.

[0038] The recycled polycarbonate resin used in this embodiment may contain one or more structural units represented by formulae (C1) to (C4). [ka]

[0039] The recycled polycarbonate resin used in this embodiment has a PSA content of preferably 5 mass ppm or more, more preferably 30 mass ppm or more, even more preferably 50 mass ppm or more, even more preferably 100 mass ppm or more, even more preferably 200 mass ppm or more, and preferably 700 mass ppm or less, more preferably 600 mass ppm or less, even more preferably 500 mass ppm or less, even more preferably 380 mass ppm or less, and even more preferably 350 mass ppm or less, when hydrolyzed, relative to 100 mass parts of recycled polycarbonate. By making it equal to or more than the lower limit, the availability of recycled polycarbonate tends to be improved. Also, by making it equal to or less than the upper limit, transesterification is suppressed, and thickening due to reactive compounds during retention tends to be suppressed.

[0040] The recycled polycarbonate resin used in this embodiment, when hydrolyzed, has a PSA-Me content of 10 mass ppm or more, more preferably 50 mass ppm or more, more preferably 150 mass ppm or more, even more preferably 300 mass ppm or more, even more preferably 500 mass ppm or more, and preferably 2000 mass ppm or less, more preferably 1500 mass ppm or less, even more preferably 1000 mass ppm or less, even more preferably 900 mass ppm or less, and even more preferably 800 mass ppm or less, based on 100 parts by mass of recycled polycarbonate. By making it equal to or more than the lower limit, the availability of recycled polycarbonate tends to be improved. In addition, by making it equal to or less than the upper limit, transesterification is suppressed, and thickening due to reactive compounds during retention tends to be suppressed.

[0041] The recycled polycarbonate resin used in this embodiment may have a PBA content of 0 parts by mass or more relative to 100 parts by mass of recycled polycarbonate when hydrolyzed, preferably 0.01 mass ppm or more, more preferably 10 mass ppm or more, more preferably 30 mass ppm or more, even more preferably 100 mass ppm or more, even more preferably 400 mass ppm or more, and preferably 2000 mass ppm or less, more preferably 1500 mass ppm or less, even more preferably 1000 mass ppm or less, even more preferably 900 mass ppm or less, and even more preferably 800 mass ppm or less. By making it equal to or more than the lower limit, the availability of recycled polycarbonate tends to be improved. In addition, by making it equal to or less than the upper limit, transesterification is suppressed, and thickening due to reactive compounds during retention tends to be suppressed.

[0042] The recycled polycarbonate resin used in this embodiment, when hydrolyzed, has a dicarboxylic acid content (two dicarboxylic acids DA1 and DA2 described later) of 1 mass ppm or more, more preferably 10 mass ppm or more, even more preferably 100 mass ppm or more, even more preferably 200 mass ppm or more, even more preferably 300 mass ppm or more, and preferably 1500 mass ppm or less, more preferably 1000 mass ppm or less, even more preferably 900 mass ppm or less, even more preferably 800 mass ppm or less, and even more preferably 700 mass ppm or less. By making it equal to or more than the lower limit, the availability of recycled polycarbonate tends to be improved. In addition, by making it equal to or less than the upper limit, transesterification is suppressed, and thickening due to reactive compounds during retention tends to be suppressed.

[0043] [ka]

[0044] The contents of PSA, PSA-Me, PBA, and dicarboxylic acids (DA1, DA2) generated by hydrolysis of the recycled polycarbonate resin are measured according to the description in the examples described later.

[0045] The recycled polycarbonate resin preferably has a terminal hydroxyl group content of 150 to 800 ppm. By using a recycled polycarbonate resin having a terminal hydroxyl group content of 150 to 800 ppm, the reactivity tends to be good, and in particular, when an epoxy compound having an epoxy equivalent of 100 to 1200 g / eq is used, the hydrolysis resistance tends to be further improved. The amount of terminal hydroxyl groups is preferably 200 ppm or more, more preferably 250 ppm or more, even more preferably 300 ppm or more, even more preferably 350 ppm or more, even more preferably 400 ppm or more, even more preferably 450 ppm or more, and particularly more preferably 500 ppm or more. By making it equal to or more than the lower limit, reactivity tends to be improved. In addition, the amount of terminal hydroxyl groups is preferably 750 ppm or less, more preferably 700 ppm or less, even more preferably 650 ppm or less, even more preferably 640 ppm or less, and may be 610 ppm or less. In addition, by making it equal to or less than the upper limit, transesterification tends to be suppressed, and thickening when a reactive compound is added tends to be suppressed. When the resin composition of the present embodiment contains two or more kinds of recycled polycarbonate resins, the amount of terminal hydroxyl groups is the amount of the recycled polycarbonate resin mixture.

[0046] The amount of terminal hydroxyl groups in polycarbonate resin (PC resin) refers to the total amount of terminal hydroxyl groups shown below, and is the ratio of the mass of terminal hydroxyl groups to the total mass of the polycarbonate resin, expressed in ppm. The measurement method is in accordance with colorimetric determination by the titanium tetrachloride / acetic acid method (the method described in Macromol. Chem. 88215 (1965)). [ka] In the formula, R 5 is a group selected from a halogen atom, a nitro group, a cyano group, an alkyl group having 1 to 20 carbon atoms, an alkoxycarbonyl group having 2 to 20 carbon atoms, a cycloalkyl group having 4 to 20 carbon atoms, and an aryl group having 6 to 20 carbon atoms, and r represents an integer of 0 to 2. When r is 2, two R 5 may be the same or different. The wavy line portions indicate the bonding positions with the main chain of the polycarbonate resin.

[0047] The resin composition of the present embodiment has a melt volume rate (MVR) of 4 to 30 cm3, measured according to ISO1133 at 300°C and a load of 1.20 kgf. 3 / 10 minutes is preferred. The MVR of the recycled polycarbonate resin is 5 cm 3 / 10 minutes or more is preferable, 6cm 3 / 10 minutes or more is preferable, and 30 cm 3 / 10 minutes or less is preferable, 20cm 3 / 10 minutes or less is preferable, and 15 cm 3 / 10 minutes or less is more preferable, and 10 cm 3 / 10 minutes or less is more preferable, and 8 cm 3 It is more preferable that the viscosity is 100 / min or less. By making the viscosity equal to or more than the lower limit, the fluidity tends to be improved. Also, by making the viscosity equal to or less than the upper limit, the mechanical properties tend to be improved. The resin composition of the present embodiment may contain only one type of recycled polycarbonate resin, or may contain two or more types. When two or more types are contained, it is preferable that the MVR of the mixture is in the above range.

[0048] The polydispersity (Mw / Mn) of the recycled polycarbonate resin is preferably 2.6 or more, and is preferably 3.5 or less, and more preferably 3.3 or less. The polydispersity of the recycled polycarbonate resin is measured according to the description of the examples described later.

[0049] Recycled polycarbonate resin usually has a higher metal element content than virgin products due to the resin consumption and recycling process. However, even recycled polycarbonate resin may not have a high metal element content. From the viewpoint of availability, ease of production, and quality stability of the recycled polycarbonate resin, the recycled polycarbonate resin used in this embodiment preferably has an aluminum element content of 0.2 to 100 mass ppm relative to 100 parts by mass of the recycled polycarbonate resin. Furthermore, the aluminum element content is preferably 0.5 mass ppm or more, more preferably 1 mass ppm or more, even more preferably 2 mass ppm or more, even more preferably 5 mass ppm or more, even more preferably 7 mass ppm or more, even more preferably 8 mass ppm or more, and more preferably 80 mass ppm or less, even more preferably 70 mass ppm or less, even more preferably 60 mass ppm or less, even more preferably 50 mass ppm or less, even more preferably 30 mass ppm or less, even more preferably 15 mass ppm or less, and particularly more preferably 10 mass ppm or less. By setting the content to the lower limit or more, the thickening of the mixture of the polyalkylene terephthalate resin and the recycled polycarbonate resin is suppressed, and the laser marking property tends to be improved. By setting the content to the upper limit or less, the insulating properties such as the dielectric breakdown strength tend to be improved, and the amount of gas generated tends to be reduced.

[0050] From the viewpoint of availability, ease of production, and quality stability of the recycled polycarbonate resin, in this embodiment, it is preferable that the recycled polycarbonate resin contains iron element at a ratio of 0.2 to 100 mass ppm relative to the polycarbonate resin. The content of the iron element is more preferably 0.8 mass ppm or more, even more preferably 1 mass ppm or more, even more preferably 2 mass ppm or more, even more preferably 3 mass ppm or more, even more preferably 4 mass ppm or more, and more preferably 50 mass ppm or less, even more preferably 35 mass ppm or less, even more preferably 20 mass ppm or less, even more preferably 15 mass ppm or less, even more preferably 10 mass ppm or less, and even more preferably 8 mass ppm or less. By making it above the lower limit, the thickening of the mixture of the polyalkylene terephthalate resin and the recycled polycarbonate resin is suppressed, and the laser marking property tends to be further improved. Furthermore, by setting the content to be equal to or less than the upper limit, the insulating properties such as the dielectric breakdown strength tend to be further improved, and the amount of gas generated tends to be reduced.

[0051] From the viewpoint of availability, ease of production, and quality stability of the recycled polycarbonate resin, in this embodiment, it is preferable that the recycled polycarbonate resin contains phosphorus element at a ratio of 3 to 200 mass ppm relative to the polycarbonate resin. The content of the phosphorus element is more preferably 4 mass ppm or more, even more preferably 5 mass ppm or more, even more preferably 6 mass ppm or more, even more preferably 7 mass ppm or more, and more preferably 150 mass ppm or less, even more preferably 100 mass ppm or less, even more preferably 50 mass ppm or less, even more preferably 10 mass ppm or less, and even more preferably 8 mass ppm or less. By making it equal to or more than the lower limit, the thickening of the mixture of the polyalkylene terephthalate resin and the recycled polycarbonate resin is suppressed, and the laser marking property tends to be improved. In addition, by making it equal to or less than the upper limit, the insulating properties such as dielectric breakdown strength tend to be further improved, the amount of gas generated tends to be reduced, and the hydrolysis resistance tends to be improved.

[0052] The resin composition of the present embodiment may contain only recycled polycarbonate resin as the polycarbonate resin, or may contain virgin polycarbonate resin in addition to recycled polycarbonate resin. The content of the recycled polycarbonate resin in the resin composition of the present embodiment is preferably 50 parts by mass or more, more preferably 60 parts by mass or more, even more preferably 70 parts by mass or more, even more preferably 80 parts by mass or more, and even more preferably 90 parts by mass or more, and is 100 parts by mass or less, in 100 parts by mass of the polycarbonate resin. By making it equal to or more than the lower limit, recyclability is improved. By making it equal to or less than the upper limit, production stability and quality stability tend to be further improved.

[0053] <Blend ratio of polyalkylene terephthalate resin and polycarbonate resin> In the resin composition of the present embodiment, the mass ratio of the polyalkylene terephthalate resin (preferably polybutylene terephthalate resin) and the polycarbonate resin in a total of 100 parts by mass is 10 / 90 to 90 / 10. By using such a blend ratio, the balance of chemical resistance, dimensional stability, and weather discoloration resistance tends to be further improved. The blend ratio is preferably such that the proportion of the polyalkylene terephthalate resin in a total of 100 parts by mass of the polyalkylene terephthalate resin and the polycarbonate resin is 20 parts by mass or more, more preferably 30 parts by mass or more, even more preferably 40 parts by mass or more, even more preferably 50 parts by mass or more, even more preferably 60 parts by mass or more, even more preferably 65 parts by mass or more, and is preferably 85 parts by mass or less, more preferably 80 parts by mass or less, and even more preferably 75 parts by mass or less. The resin composition of the present embodiment may contain only one type of polyalkylene terephthalate resin and one type of polycarbonate resin, or may contain two or more types. When two or more types are contained, the total amount is preferably within the above range.

[0054] The total amount of the polyalkylene terephthalate resin (preferably polybutylene terephthalate resin) and the polycarbonate resin (preferably recycled polycarbonate resin) in the resin composition of this embodiment is preferably 10% by mass or more, more preferably 20% by mass or more, even more preferably 30% by mass or more, even more preferably 40% by mass or more, even more preferably 50% by mass or more, even more preferably 60% by mass or more, and preferably 90% by mass or less, more preferably 80% by mass or less, even more preferably 75% by mass or less, and even more preferably 70% by mass or less. By making it equal to or more than the lower limit, moldability tends to be improved and weather discoloration resistance tends to be improved. In addition, by making it equal to or less than the upper limit, the appearance of the molded product tends to be improved and weather discoloration resistance tends to be improved.

[0055] <Reactive compounds> The resin composition of the present embodiment contains a reactive compound. By containing the reactive compound, even when a recycled polycarbonate resin is used, the residence stability can be improved. The reactive compound is preferably at least one selected from the group consisting of a carbodiimide compound, an epoxy compound, a compound having an oxazoline group (ring), a compound having an oxazine group (ring), a compound having a carboxylic acid, and a compound having an amide group, and is particularly preferably an epoxy compound, since it tends to improve impact resistance, tensile strength, flexural strength, and hydrolysis resistance, and also tends to improve demolding properties during molding.

[0056] The epoxy compound may be any compound having one or more epoxy groups in one molecule, and typically, a glycidyl compound which is a reaction product of epichlorohydrin with an alcohol, a phenol, or a carboxylic acid, or a compound in which an olefinic double bond has been epoxidized may be used. Examples of epoxy compounds include novolac epoxy compounds, bisphenol A epoxy compounds, bisphenol F epoxy compounds, alicyclic epoxy compounds, glycidyl ethers, glycidyl esters, epoxidized butadiene polymers, and resorcinol epoxy compounds. In this embodiment, the epoxy compound is preferably a bisphenol A epoxy compound or a novolac epoxy compound. The use of these epoxy compounds tends to suppress the thickening of the mixture of polyalkylene terephthalate resin and polycarbonate resin, improve moldability, and improve hydrolysis resistance, impact resistance, tensile strength, bending strength, and mold releasability during molding.

[0057] Examples of novolac type epoxy compounds include phenol novolac type epoxy compounds, cresol novolac type epoxy compounds, etc. In this embodiment, cresol novolac type epoxy compounds are particularly preferred. Examples of the bisphenol A type epoxy compound include bisphenol A diglycidyl ether and hydrogenated bisphenol A diglycidyl ether, and examples of the bisphenol F type epoxy compound include bisphenol F diglycidyl ether and hydrogenated bisphenol F diglycidyl ether.

[0058] Examples of the alicyclic epoxy compounds include vinylcyclohexene dioxide, dicyclopentadiene oxide, 3,4-epoxycyclohexyl-3,4-cyclohexylcarboxylate, bis(3,4-epoxycyclohexylmethyl)adipate, vinylcyclohexene diepoxide, 3,4-epoxycyclohexyl glycidyl ether, and the like.

[0059] Specific examples of glycidyl ethers include monoglycidyl ethers such as methyl glycidyl ether, butyl glycidyl ether, 2-ethylhexyl glycidyl ether, decyl glycidyl ether, stearyl glycidyl ether, phenyl glycidyl ether, butylphenyl glycidyl ether, and allyl glycidyl ether; and diglycidyl ethers such as neopentyl glycol diglycidyl ether, ethylene glycol diglycidyl ether, glycerin diglycidyl ether, propylene glycol diglycidyl ether, and bisphenol A diglycidyl ether.

[0060] Examples of the glycidyl esters include monoglycidyl esters such as glycidyl benzoate and glycidyl sorbate; and diglycidyl esters such as diglycidyl adipic acid, diglycidyl terephthalate and diglycidyl orthophthalate.

[0061] Examples of the epoxidized butadiene polymer include epoxidized polybutadiene, epoxidized styrene-butadiene copolymers, and epoxidized hydrogenated styrene-butadiene copolymers. An example of the resorcin type epoxy compound is resorcin diglycidyl ether.

[0062] The epoxy compound may also be a copolymer containing a glycidyl group-containing compound as one component, such as a copolymer of a glycidyl ester of an α,β-unsaturated acid and one or more monomers selected from the group consisting of an α-olefin, acrylic acid, an acrylic acid ester, a methacrylic acid, and a methacrylic acid ester.

[0063] The number average molecular weight of the epoxy compound is preferably 100 or more, more preferably 200 or more, even more preferably 300 or more, even more preferably 500 or more, even more preferably 1000 or more, and preferably 3000 or less, more preferably 2000 or less, even more preferably 1500 or less, even more preferably 1000 or less, and even more preferably 500 or less. By making it equal to or more than the lower limit, there is a tendency to suppress the viscosity increase of the resin. Also, by making it equal to or less than the upper limit, there is a tendency to improve hydrolysis resistance and suppress decomposition of the resin. When the resin composition of the present embodiment contains two or more types of epoxy compounds, the number average molecular weight of the mixture preferably falls within the above range.

[0064] The epoxy equivalent of the epoxy compound is preferably 10000g / eq or less, more preferably 5000g / eq or less, even more preferably 1200g / eq or less, even more preferably 800g / eq or less, even more preferably 500g / eq or less, even more preferably 400g / eq or less, even more preferably 300g / eq or less, particularly more preferably 250g / eq or less, and also preferably 50g / eq or more, more preferably 100g / eq or more, even more preferably 150g / eq or more, even more preferably 180g / eq or more, and even more preferably 200g / eq or less. By making it below the upper limit, there is a tendency to improve hydrolysis resistance and suppress deterioration of the resin. Also, by making it above the lower limit, there is a tendency to suppress thickening of the resin composition. When the resin composition of the present embodiment contains two or more types of epoxy compounds, the epoxy equivalent is the weighted average value of the epoxy equivalents of the respective epoxy compounds.

[0065] The content of the reactive compound (preferably an epoxy compound) in the resin composition of this embodiment is, relative to 100 parts by mass of the total of the polyalkylene terephthalate resin and the polycarbonate resin, 0.1 parts by mass or more, preferably 0.3 parts by mass or more, more preferably 0.5 parts by mass or more, even more preferably 0.8 parts by mass or more, even more preferably 1.0 parts by mass or more, even more preferably 1.2 parts by mass or more, and is 20 parts by mass or less, preferably 18 parts by mass or less, more preferably 15 parts by mass or less, even 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. The resin composition of the present embodiment may contain only one type of reactive compound, or may contain two or more types. When two or more types are contained, the total amount is preferably in the above range.

[0066] <Interesterification inhibitor> The resin composition of the present embodiment may contain an ester exchange inhibitor. By containing an ester exchange inhibitor, a resin composition or a molded article having excellent thermal stability can be obtained. As an example of the transesterification inhibitor, a phosphate and / or phosphoric acid is preferable, and phosphoric acid is more preferable. By using a phosphate and / or phosphoric acid, transesterification of the resin composition is inhibited, and the thermal stability, heat resistance, mold releasability and residence stability tend to be further improved. Furthermore, by using phosphoric acid, transesterification of the resin composition is suppressed, and the thermal stability, heat resistance, mold releasability and retention stability tend to be further improved. Examples of the phosphate include zinc phosphate, phosphate of a metal of Group 1 or Group 2, and metal salt of an organic phosphate. As the phosphate, a phosphate of a metal of Group 2 or zinc phosphate is preferred because it tends to suppress the thickening of the resin. Examples of the phosphoric acid include organic phosphate. By using an organic phosphate, the retention stability of the resin composition can be more effectively improved.

[0067] In this embodiment, the phosphate preferably contains at least one of a compound represented by formula (P1) and a compound represented by formula (P2). Formula (P1) Formula (P2) [ka] (In formula (P1) and formula (P2), R x each independently represents a linear or branched alkyl group having 3 to 30 carbon atoms.

[0068] R x The number of carbon atoms in the alkyl group is preferably 8 or more, more preferably 13 or more, and even more preferably 15 or more, and is preferably 25 or less, more preferably 20 or less, even more preferably 18 or less, and most preferably 18. R x is a straight-chain or branched alkyl group, but is preferably a straight-chain alkyl group.

[0069] In this embodiment, it is more preferable that the phosphate contains at least one of the compounds represented by formula (P1-1) and (P2-1). In this embodiment, a mixture of the compounds represented by formula (P1-1) and (P2-1) is more preferable. Formula (P1-1) Formula (P2-1) [ka]

[0070] The phosphoric acid preferably contains at least one compound represented by formula (P3). Formula (P3) [ka] (In formula (P3), R represents a linear or branched alkyl group having 2 to 18 carbon atoms. nx represents 1 or 2.) The number of carbon atoms in R is preferably 8 or more, more preferably 13 or more, and even more preferably 15 or more, and is preferably 25 or less, more preferably 20 or less, even more preferably 18 or less, and even more preferably 18. R is a straight-chain or branched alkyl group, preferably a straight-chain alkyl group.

[0071] nx is 1 or 2, and is preferably a mixture of 1 and 2.

[0072] The transesterification inhibitor may be a commercially available product, and examples thereof include AX-71 manufactured by ADEKA Corporation, and JP-518Zn manufactured by Johoku Chemical Co., Ltd.

[0073] The content of the transesterification inhibitor in the resin composition of the present embodiment is preferably 0.01 parts by mass or more, more preferably 0.06 parts by mass or more, and even more preferably 0.1 parts by mass or more, and preferably 2 parts by mass or less, more preferably 1 part by mass or less, and even more preferably 0.5 parts by mass or less, relative to 100 parts by mass of the total of the polyalkylene terephthalate resin and the polycarbonate resin. By making it equal to or more than the lower limit, the effect of suppressing thermal deterioration and oxidative deterioration of the resin during melt kneading, molding, and use as a molded body tends to be improved, discoloration of the resin tends to be more effectively suppressed, and the retention stability of the resin composition and the appearance and weather resistance of the molded product obtained tend to be improved. By making it equal to or less than the upper limit, adverse effects on the appearance and physical properties due to aggregation of additives such as stabilizers can be effectively suppressed, and the moist heat resistance and retention stability of the resin composition and the weather resistance of the molded product tend to be improved. The mass ratio (reactive compound / ester exchange inhibitor) of the reactive compound (preferably an epoxy compound) to the ester exchange inhibitor in the resin composition of this embodiment is preferably 1.0 or more, more preferably 2.5 or more, even more preferably 5.0 or more, and even more preferably 7.5 or more, and is preferably 100 or less, more preferably 75 or less, even more preferably 50 or less, and even more preferably 25 or less. By setting the upper and lower limits as described above, the hydrolysis resistance of the resin tends to be suppressed, deterioration and thickening of the resin during retention tends to be suppressed, the heat resistance of the resin tends to be improved, and the flowability of the resin composition tends to be improved. The resin composition of the present embodiment may contain only one type of transesterification inhibitor, or may contain two or more types. When two or more types are contained, the total amount is preferably in the above range.

[0074] <Antioxidants> The resin composition of the present embodiment may contain an antioxidant. By containing an antioxidant, a resin composition or a molded article having excellent thermal stability can be obtained. The antioxidant preferably contains one or more compounds selected from the group consisting of thioether compounds, hindered phenol compounds, and phosphite compounds. In the present embodiment, it is also preferable to use two or more of the thioether-based compound, the hindered phenol-based compound, and the phosphite-based compound in combination. By using two or more of the antioxidants in combination in this way, the thermal stability is further improved, and the thermal stability tends to continue for a long period of time.

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

[0076] Examples of hindered phenol compounds include pentaerythritol tetrakis (3-(3,5-di-t-butyl-4-hydroxyphenyl) propionate), octadecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate, thiodiethylene bis (3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate), pentaerythritol tetrakis (3-(3,5-di-neopentyl-4-hydroxyphenyl) propionate), 1,3,5-trimethyl-2,4,6-tris (3,5-di-tert-butyl-4-hydroxybenzyl) benzene, etc. 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 Corporation under the trade names "ADEKA STAB AO-60" and "ADEKA STAB AO-330."

[0077] 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: 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 phosphite, 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 preferable. An example of a commercially available product is "ADEKA STAB PEP-36" manufactured by ADEKA Corporation.

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

[0079] The content of the antioxidant in the resin composition of the present embodiment is 0.01 parts by mass or more, preferably 0.05 parts by mass or more, more preferably 0.1 parts by mass or more, and even more preferably 0.2 parts by mass or more, relative to 100 parts by mass of the total of the polyalkylene terephthalate resin and the polycarbonate resin. By making it equal to or more than the lower limit, the effect of suppressing thermal deterioration and oxidative deterioration of the resin during melt kneading, molding, and use as a molded body tends to be improved, and discoloration of the resin tends to be more effectively suppressed. In addition, the upper limit of the content of the antioxidant is preferably 2.0 parts by mass or less, more preferably 1.5 parts by mass or less, and even more preferably 1.0 parts by mass or less, relative to 100 parts by mass of the total of the polyalkylene terephthalate resin and the polycarbonate resin. By making it equal to or less than the upper limit, adverse effects on appearance and physical properties due to aggregation of additives such as antioxidants can be effectively suppressed. The resin composition of the present embodiment may contain only one type of antioxidant, or may contain two or more types. When two or more types are contained, the total amount is preferably in the above range.

[0080] <Reinforcing filler> The resin composition of the present embodiment may contain a reinforcing filler. By containing a reinforcing filler, the mechanical strength of the obtained shaped article can be improved. The shape of the reinforcing filler can be scaly, spherical, needle-like, or fibrous, with fibrous reinforcing fillers (reinforcing fibers) being preferred. Examples of the components of the reinforcing filler include glass, metal oxides, metal hydroxides, carbonates, and sulfates, with glass being preferred. As the reinforcing fibers, carbon fibers and glass fibers are preferable, and glass fibers are more preferable.

[0081] Next, the glass fiber preferably used in this embodiment will be described. The glass fiber is a fiber obtained by melt spinning a glass such as E glass, C glass, D glass, R glass, A glass, S glass, and alkali-resistant glass, which are commonly supplied, but any glass fiber can be used, and is not particularly limited. In the present embodiment, it is preferable to include E glass.

[0082] The glass fiber used in this embodiment is preferably surface-treated with a known silane coupling agent such as epoxy silane, amino silane, vinyl silane, or phosphoric acid. The amount of the surface treatment agent attached is preferably 0.01 to 1 mass% of the glass fiber. Furthermore, if necessary, it is also possible to use glass fibers that have been surface-treated with a lubricant such as a fatty acid amide compound or silicone oil, an antistatic agent such as a quaternary ammonium salt, a resin having a film-forming ability such as an epoxy resin or urethane resin, or a mixture of a resin having a film-forming ability and a thermal oxidation inhibitor.

[0083] Glass fibers are commercially available, such as T-187, T-187H, T-127, T-127H, T-286H, T-756H, and T-289H manufactured by Nippon Electric Glass Co., Ltd., DEFT2A manufactured by Owens Corning, HP3540 manufactured by PPG, and CSG3PA820 manufactured by Nitto Boseki Co., Ltd.

[0084] The content of the reinforcing filler in the resin composition of this embodiment, when a reinforcing filler (preferably glass fiber) is included, is preferably 20 parts by mass or more, more preferably 30 parts by mass or more, even more preferably 35 parts by mass or more, even more preferably 40 parts by mass or more, and is preferably 150 parts by mass or less, more preferably 125 parts by mass or less, even more preferably 100 parts by mass or less, even more preferably 75 parts by mass or less, even more preferably 60 parts by mass or less, and even more preferably 50 parts by mass or less, per 100 parts by mass of the polyalkylene terephthalate resin and the polycarbonate resin in total.

[0085] When the resin composition of this embodiment contains a reinforcing filler, the reinforcing filler (preferably glass fiber) preferably accounts for 10 to 45 mass %, more preferably 15 to 40 mass %, and may be 20 to 35 mass % in the resin composition. The resin composition of the present embodiment may contain only one type of reinforcing filler, or may contain two or more types. When two or more types are contained, the total amount is preferably within the above range.

[0086] <Coloring agent> The resin composition of the present embodiment may contain a colorant. The colorant may be a pigment or a dye, but from the viewpoints of retention stability, moldability, and releasability, a pigment is preferred, and carbon black is more preferred. For details about carbon black, please refer to paragraph 0021 of JP2011-57977A, the contents of which are incorporated herein by reference. In addition, when a colorant such as carbon black is blended in the resin composition of the present embodiment, it is preferable to form a master batch and then knead it with a polyalkylene terephthalate resin or the like. For the master batch, it is preferable to use a polyester resin, more preferably a polyalkylene terephthalate resin, even more preferably a polyethylene terephthalate resin and / or a polybutylene terephthalate resin, and even more preferably a polybutylene terephthalate resin. The use of a polybutylene terephthalate resin promotes crystallization of the resin composition. In particular, when a polybutylene terephthalate resin is present in the vicinity of a colorant such as carbon black, the crystallization promotion effect is more effectively exhibited. The proportion of the colorant in the master batch is preferably 5% by mass or more, more preferably 10% by mass or more, and is preferably 50% by mass or less, more preferably 40% by mass or less.

[0087] When the resin composition of this embodiment contains a colorant (preferably carbon black), the content thereof is preferably 0.1 part by mass or more, more preferably 0.2 parts by mass or more, even more preferably 0.4 parts by mass or more, and even more preferably 0.5 parts by mass or more, per 100 parts by mass of the polyalkylene terephthalate resin and the polycarbonate resin in total, and is preferably 3 parts by mass or less, more preferably 2 parts by mass or less, and even more preferably 1 part by mass. The resin composition of the present embodiment may contain only one type of colorant (preferably carbon black), or may contain two or more types. When two or more types are contained, the total amount is preferably in the above range.

[0088] <Release agent> The resin composition of the present embodiment preferably contains a release agent. As the release agent, a wide variety of known release agents can be used, and examples thereof include aliphatic carboxylic acid amides, aliphatic carboxylic acids, esters of aliphatic carboxylic acids and alcohols, aliphatic hydrocarbon compounds having a number average molecular weight of 200 to 15,000, and polysiloxane-based silicone oils.

[0089] Examples of the aliphatic carboxylic acid amide include compounds obtained by a dehydration reaction between a higher aliphatic monocarboxylic acid and / or a polybasic acid and a diamine. As the higher aliphatic monocarboxylic acid, saturated aliphatic monocarboxylic acids and hydroxycarboxylic acids having 16 or more carbon atoms are preferred, and examples thereof include palmitic acid, stearic acid, behenic acid, montanic acid, and 12-hydroxystearic acid. Examples of polybasic acids include aliphatic dicarboxylic acids such as malonic acid, succinic acid, adipic acid, sebacic acid, pimelic acid, and azelaic acid; aromatic dicarboxylic acids such as phthalic acid and terephthalic acid; and alicyclic dicarboxylic acids such as cyclohexanedicarboxylic acid and cyclohexylsuccinic acid. Examples of diamines include ethylenediamine, 1,3-diaminopropane, 1,4-diaminobutane, hexamethylenediamine, metaxylylenediamine, tolylenediamine, paraxylylenediamine, phenylenediamine, and isophoronediamine. As the carboxylic acid amide compound, a compound obtained by polycondensation of stearic acid, sebacic acid, and ethylenediamine is preferred, and a compound obtained by polycondensation of 2 moles of stearic acid, 1 mole of sebacic acid, and 2 moles of ethylenediamine is more preferred. In addition to bisamide compounds obtained by reacting diamines and aliphatic carboxylic acids, such as N,N'-methylenebisstearamide and N,N'-ethylenebisstearamide, dicarboxylic acid amide compounds, such as N,N'-dioctadecylterephthalamide, can also be suitably used.

[0090] Examples of the aliphatic carboxylic acid include saturated or unsaturated aliphatic mono-, di- or tri-carboxylic acids. Here, the aliphatic carboxylic acid also includes alicyclic carboxylic acids. Among these, preferred aliphatic carboxylic acids are mono- or di-carboxylic acids having 6 to 36 carbon atoms, and more preferred are saturated aliphatic mono-carboxylic acids having 6 to 36 carbon atoms. Specific examples of such aliphatic carboxylic acids include palmitic acid, stearic acid, caproic acid, capric acid, lauric acid, arachic acid, behenic acid, lignoceric acid, cerotic acid, melissic acid, tetralinic acid, montanic acid, adipic acid, and azelaic acid.

[0091] In the ester of an aliphatic carboxylic acid and an alcohol, the aliphatic carboxylic acid may be the same as the aliphatic carboxylic acid. On the other hand, the alcohol may be, for example, a saturated or unsaturated monohydric or polyhydric alcohol. These alcohols may have a substituent such as a fluorine atom or an aryl group. Among these, a monohydric or polyhydric saturated alcohol having 30 or less carbon atoms is preferred, and an aliphatic or alicyclic saturated monohydric alcohol or an aliphatic saturated polyhydric alcohol having 30 or less carbon atoms is more preferred. Specific examples of such alcohols include octanol, decanol, dodecanol, stearyl alcohol, behenyl alcohol, ethylene glycol, diethylene glycol, glycerin, pentaerythritol, 2,2-dihydroxyperfluoropropanol, neopentylene glycol, ditrimethylolpropane, and dipentaerythritol. Specific examples of esters of aliphatic carboxylic acids and alcohols include beeswax (a mixture mainly composed of myricyl palmitate), stearyl stearate, behenyl behenate, stearyl behenate, glycerin monopalmitate, glycerin monostearate, glycerin distearate, glycerin tristearate, pentaerythritol monopalmitate, pentaerythritol monostearate, pentaerythritol distearate, pentaerythritol tristearate, pentaerythritol tetrastearate, and esters of montanic acid and polyfunctional alcohols.

[0092] Examples of the aliphatic hydrocarbons having a number average molecular weight of 200 to 15,000 include liquid paraffin, paraffin wax, microwax, polyethylene wax, Fischer-Tropsch wax, and α-olefin oligomers having 3 to 12 carbon atoms. The aliphatic hydrocarbons herein also include alicyclic hydrocarbons. The number average molecular weight of the aliphatic hydrocarbons is preferably 5,000 or less.

[0093] Examples of polyolefin waxes include polyethylene wax, polypropylene wax, and polyethylene propylene wax, with polyethylene wax being preferred. The polyolefin wax may be unmodified or modified. Examples of modified polyolefin waxes include vinyl ester modified polyolefin wax, acid modified polyolefin wax, and oxidized polyolefin wax, and oxidized polyolefin wax is preferred. Oxidized polyolefin wax has excellent compatibility with polyalkylene terephthalate resins and tends to effectively suppress mold deposits in the resulting resin composition.

[0094] The oxidized polyolefin wax can be obtained by oxidizing the corresponding unmodified polyolefin wax. Examples of the oxidized polyethylene wax include Licowax (registered trademark) PED521, PED522, and PED121 manufactured by Clariant Chemicals; Ceridust (registered trademark) 3715, and the like. In addition to the above, commercially available polyolefin waxes can be found in paragraph 0028 of JP-A-2022-140470, the contents of which are incorporated herein by reference.

[0095] The weight average molecular weight of the polyolefin wax is preferably 800 or more, more preferably 1,000 or more, even more preferably 1,500 or more, even more preferably 2,000 or more, and even more preferably 2,500 or more. By making it equal to or greater than the lower limit, the glowing time tends to be further shortened. In addition, the weight average molecular weight of the polyolefin wax is preferably 30,000 or less, more preferably 20,000 or less, even more preferably 15,000 or less, and even more preferably 10,000 or less. By making it equal to or less than the upper limit, the flowability of the resin composition during molding tends to be further improved. In the case where the resin composition in the present embodiment contains two or more types of polyolefin waxes, the weight average molecular weight is the weight average molecular weight of the mixture.

[0096] The dropping point of the polyolefin wax is preferably 165°C or lower, more preferably 160°C or lower, even more preferably 155°C or lower, even more preferably 150°C or lower, even more preferably 145°C or lower, even more preferably 140°C or lower, even more preferably 135°C or lower, particularly more preferably 130°C or lower, and preferably 80°C or higher, more preferably 85°C or higher, even more preferably 85°C or higher, even more preferably 90°C or higher, and even more preferably 95°C or higher. The dropping point is determined by heating a polyolefin wax until it changes from a solid to a liquid state and the temperature at which the first drop of molten material falls from a standard cup having an opening of 2.8 mm.

[0097] As for the release agent, in addition to the above, the descriptions in paragraphs 0063 to 0077 of JP 2018-070722 A and the descriptions in paragraphs 0090 to 0098 of JP 2019-123809 A can be referred to, the contents of which are incorporated herein by reference.

[0098] The resin composition of the present embodiment preferably contains 0.01 parts by mass or more of the release agent relative to 100 parts by mass of the total of the polyalkylene terephthalate resin and the polycarbonate resin, more preferably 0.1 parts by mass or more, and even more preferably 0.3 parts by mass or more, and preferably 5 parts by mass or less, more preferably 4 parts by mass or less, even more preferably 3 parts by mass or less, even more preferably 2 parts by mass or less, and even more preferably 1 part by mass or less. By making it equal to or more than the lower limit, the releasability of the obtained molded article tends to be further improved. Also, by making it equal to or less than the upper limit, the bleed-out of the obtained molded article can be effectively suppressed. The resin composition may contain only one type of release agent, or may contain two or more types. When two or more types are contained, the total amount is preferably within the above range.

[0099] <Other ingredients> The resin composition of the present embodiment may contain other components in addition to the above-mentioned components as necessary, as long as the desired physical properties are not significantly impaired. Examples of other components include thermoplastic resins other than polyarylene terephthalate resins and polycarbonate resins, and various resin additives. The other components may be contained in one type, or in any combination and ratio of two or more types. Specific examples of the additives include nucleating agents, flame retardants, flame retardant assistants, ultraviolet absorbing agents, antistatic agents, antifogging agents, antiblocking agents, flow improvers, plasticizers, dispersants, and antibacterial agents. In addition, the resin composition of this embodiment can be blended with the additives described in paragraphs 0047 to 0103 of WO 2021 / 241471 without departing from the spirit of the present invention, the contents of which are incorporated herein by reference. In the resin composition of the present embodiment, the total amount of the polyalkylene terephthalate resin, the polycarbonate resin, the reactive compound, and the components blended as necessary is 100 mass %.

[0100] <Method of producing resin composition> The resin composition of this embodiment can be produced by a conventional method for producing a resin composition containing a thermoplastic resin. For example, the resin composition of this embodiment is produced by a method including feeding a polyalkylene terephthalate resin, a polycarbonate resin, and other components to be mixed as necessary into an extruder and melt-kneading them. The reinforcing filler may be side-fed into the extruder. In addition, when the resin composition contains a colorant, it may be mixed with a thermoplastic resin in advance as a master batch and then melt-kneaded. The heating temperature during melt kneading can usually be appropriately selected from the range of 220 to 350°C.

[0101] <Method of manufacturing molded products> The resin composition of the present embodiment is molded according to a known method. The manufacturing method of the molded product is not particularly limited, and any molding method generally used for resin compositions can be used. Examples of such molding methods include injection molding, ultra-high speed injection molding, injection compression molding, two-color molding, gas-assisted 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., and among these, injection molding is preferred. For details of the injection molding method, refer to paragraphs 0113 to 0116 of Japanese Patent No. 6183822, the contents of which are incorporated herein by reference. The mold temperature during molding such as injection molding is preferably 40 to 150°C. The resin composition of the present embodiment is also preferably used in a molding method that requires retention stability. For example, the resin composition of the present embodiment can be used in a nano molding technology (NMT) method, which is a joining technique between metal and resin by insert molding.

[0102] <Application> An example of the resin composition of this embodiment is a pellet. The molded article of the present embodiment is formed from the resin composition of the present embodiment or the pellets of the present embodiment. The molded article of this embodiment can be used in a variety of applications, such as various storage containers, electrical and electronic equipment parts, office automation (OA) equipment parts, home appliance parts, machine mechanism parts, and vehicle parts (vehicle mechanism parts, vehicle housing parts). Vehicle parts include lamp housings, reflectors, bezels, extensions, connectors, ECU cases, head-up display housings, housings for in-vehicle cameras and millimeter-wave radars, battery cases, inverters, high-voltage connectors, sensor housings, and housings for charging components for EVs. Examples of electric and electronic components include display devices such as personal computers, game consoles and televisions, printers, copy machines, scanners, fax machines, electronic organizers and PDAs, electronic desk calculators, electronic dictionaries, cameras, video cameras, mobile phones, smartphones, battery packs, drives and readers for recording media, mice, numeric keypads, CD players, MD players, portable radios and audio players, housings, covers, keyboards, buttons, switch components, power meter casings, battery cases, battery transport trays, relays, sensors, actuators, terminal switches and grill cooking appliance parts. EXAMPLES

[0103] The present invention will be described in more detail below with reference to examples. The materials, amounts, ratios, processing contents, 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.

[0104] 1.Raw materials The following raw materials were used: [Table 1]

[0105] <Measurement of the amount of bisphenol A (BPA) in polycarbonate resin (virgin and recycled products)> Polycarbonate resin was dissolved in dichloromethane solution, methanol was dropped therein to reprecipitate the polymer component, filtered, and the filtrate was dried and dissolved in 5 mL of methanol. The methanol solution was analyzed by high performance liquid chromatography (Shimadzu Corporation "LC-20AD Prominence") to determine the content of bisphenol A. A calibration curve prepared from a separately prepared standard substance was used to calculate the content.

[0106] <Measurement of branching amount of polycarbonate resin (virgin and recycled products)> In this embodiment, the branching amount of the polycarbonate resin means the total content (unit: mass ppm) of PSA, PSA-Me, PBA, and PBA dicarboxylic acid (structures shown below) obtained after hydrolysis of the polycarbonate resin. Specifically, 0.5 g of polycarbonate resin was dissolved in 5 mL of methylene chloride, and then 45 mL of methanol and 5 mL of 25% by mass aqueous sodium hydroxide solution were added, and the mixture was stirred for 30 minutes at 70° C. to hydrolyze (methylene chloride solution). Then, 6N hydrochloric acid was added to the methylene chloride solution to adjust the pH of the solution to about 2, and the volume was adjusted to 100 mL with pure water. Next, 20 μL of the prepared methylene chloride solution was injected into a liquid chromatograph to measure the contents of PSA, PSA-Me, PBA, and PBA dicarboxylic acid, the structures of which are shown below, and the total amount of these was taken as the branching amount of the polycarbonate resin (unit: mass ppm). The liquid chromatography and measurement conditions are as follows. Liquid chromatography: Shimadzu Corporation LC-10AD Column: YMC PACK ODS-AM M-307-3 4.6mm ID x 75mm L Detector: UV280nm Eluent: (A) 0.05% trifluoroacetic acid aqueous solution (B) methanol Gradient conditions: 0 min (B = 40%), 25 min (B-95% The contents of PSA, PSA-Me, PBA, and PBA dicarboxylic acid were calculated from their respective peak areas based on a calibration curve prepared with bisphenol A.

[0107] The contents of PSA, PSA-Me, PBA, and dicarboxylic acids (DA1, DA2) were calculated from their respective peak areas based on a calibration curve prepared with bisphenol A.

[0108] The above PSA, PSA-Me, PBA, and dicarboxylic acid (DA1, DA2) are as follows. [ka]

[0109] <Measurement of MVR of polycarbonate resin (virgin and recycled products)> The melt volume rate of polycarbonate resin (virgin and recycled products) was measured in accordance with ISO1133 at 300℃ and a load of 1.20kgf. The unit is cm 3 / 10min.

[0110] <Dispersion ratio (Mw / Mn) of polycarbonate resin (virgin and recycled products)> The weight average molecular weight (Mw) and number average molecular weight (Mn) of polycarbonate resin (virgin and recycled products) were measured using HLC-8320GPC / EcoSEC (TOSOH Corporation) and calculated in terms of polystyrene. The measurement conditions are as follows. Column: Shodex KF-G + KF-805L x 3 + KF-800D Detector: UV detector 254nm Column temperature: 40℃ Eluent: tetrahydrofuran (THF) Based on the obtained Mw and Mn, the dispersity (Mw / Mn) was calculated. In this specification, Mw and Mn for all components are values ​​measured by the above-mentioned method. In addition, when two or more kinds of polycarbonate resins are contained, the Mw and Mn of the polycarbonate resins are the Mw and Mn of the mixture, respectively. The same applies to the other components.

[0111] <Measurement of the amount of metal elements> Qualitative / semi-quantitative analysis of metal elements (Al, Fe, P) in polycarbonate resin was performed by ICP emission spectrometry. In this case, 200 mg of sample was weighed out as pretreatment, and Kjeldahl wet decomposition (sulfuric acid / nitric acid, sulfuric acid / hydrogen peroxide) was performed, and the volume was adjusted to 50 mL. Then, ICP emission spectrometry was performed by acid concentration matching single point calibration method. The unit is shown in ppm by mass. ICP emission analysis was performed using a ThermoThromo Fisher Scientific "iCAP7600duoiCAP76000uo" by axial / radial photometry.

[0112] The details of PC-1 to PC-3 are as follows.

[0113] [Table 2] *ND: Below detection limit

[0114] 2. Examples 1 to 5, Comparative Examples 1 and 2 <Compound> The components shown in Table 1 were mixed uniformly in a tumbler mixer in the ratios shown in Table 3 (each component in Table 3 is shown in parts by mass). The mixture obtained was fed to a twin-screw extruder ("TEX30α" manufactured by Japan Steel Works, Ltd.) from the main feed port. The cylinder temperature setting of the first kneading section was set to 260°C, and the glass fibers were fed from a side feeder. The resin composition was melt-kneaded under the conditions of a cylinder temperature setting of 260°C after the addition of the glass fibers and a screw rotation speed of 200 rpm, and was quenched in a water tank and pelletized using a pelletizer to obtain pellets of the resin composition.

[0115] <Melt viscosity at each residence time> Using a Capillograph (Toyo Seiki Co., Ltd. "Capillograph 1C"), measuring temperature 270℃, and a 1φ×30 flat capillary, the pellets obtained above were added and then the melt viscosity (melt viscosity at a shear rate of 91.2 sec-1, unit: Pa·S) was measured after retention for 3, 5, 10, 20, 30, 40, 50, and 60 minutes, and the difference between the maximum and minimum melt viscosity values ​​(unit: Pa·S) was calculated. The smaller the difference between the maximum and minimum values, the less the viscosity increase and the better the retention stability.

[0116] [Table 3]

[0117] As is clear from the above results, the resin composition of the present invention was able to maintain a low melt viscosity regardless of the residence time (Examples 1 to 5). In particular, the melt viscosity was lower regardless of the residence time than the resin composition using virgin polycarbonate resin (Comparative Example 1). In addition, the melt viscosity after residence was significantly lower than that of the resin composition not containing polycarbonate resin (Comparative Example 2). Furthermore, the resin composition of the present invention uses a specified recycled polycarbonate resin and a specified epoxy compound, and as a result, the hydrolysis resistance is equal to or greater than that of conventional products. Furthermore, the resin composition of the present invention uses a specified recycled polycarbonate resin and a specified epoxy compound, and thus various physical properties, particularly moist heat resistance, are improved compared to conventional products.

Claims

1. For a total of 100 parts by mass of polyalkylene terephthalate resin and polycarbonate resin, Contains 0.1 to 20 parts by mass of a reactive compound; a mass ratio of the polyalkylene terephthalate resin to the polycarbonate resin in a total of 100 parts by mass of the polyalkylene terephthalate resin and the polycarbonate resin is 10 / 90 to 90 / 10; The polycarbonate resin contains recycled polycarbonate resin, The branching amount of the recycled polycarbonate resin is 50 to 3500 ppm by mass. Resin composition.

2. Further, the composition contains 0.01 to 2 parts by mass of an ester exchange inhibitor per 100 parts by mass of the polyalkylene terephthalate resin and the polycarbonate resin in total. The resin composition according to claim 1.

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

4. The resin composition according to claim 1 or 2, wherein the reactive compound comprises an epoxy compound.

5. Further, the composition contains 0.01 to 2 parts by mass of an ester exchange inhibitor per 100 parts by mass of the polyalkylene terephthalate resin and the polycarbonate resin in total, the polyalkylene terephthalate resin comprises a polybutylene terephthalate resin; The resin composition according to claim 1 , wherein the reactive compound comprises an epoxy compound.

6. A pellet of the resin composition according to claim 1, 2 or 5.

7. A molded article formed from the resin composition according to claim 1, 2 or 5.

8. A molded article formed from the pellets of claim 6.

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