Polycarbonate resin composition and molded article thereof

Abstract

A polycarbonate resin composition containing a carbonate structural unit (X) derived from at least one aliphatic dihydroxy compound represented by formula (1), formula (2), and formula (8), and a carbonate structural unit (Y) derived from an aromatic dihydroxy compound represented by formula (3), the content of the carbonate structural unit (X) in 100 mass% of all carbonate structural units in the polycarbonate resin composition is 10 mass% or more and less than 26 mass%, and the content of the carbonate structural unit (Y) is greater than 74 mass% and 90 mass% or less.

Description

TECHNICAL FIELD

[0001] The present application relates to a polycarbonate resin composition, and a molded article such as an injection-molded article and an extrusion-molded article of the polycarbonate resin composition. BACKGROUND

[0002] Polycarbonate resins are excellent in mechanical strength, electrical properties, transparency, and the like, and are used in various fields such as the field of electrical / electronic equipment and the field of automobiles.

[0003] However, polycarbonate resins are easily damaged compared to glass, and there is a disadvantage that the appearance is easily damaged when products are manufactured. In order to overcome this disadvantage, a polycarbonate resin having improved surface hardness and scratch resistance has been developed (Patent Documents 1, 2, and 3).

[0004] However, the polycarbonate resins of Patent Documents 1 to 3 are not completely free from damage, and damage gradually accumulates over the years of use, which damages the appearance.

[0005] As a method for solving this problem, it is considered to apply a hard coat to the polycarbonate resin to further improve the surface hardness. However, it is generally known that the application of a hard coat treatment increases the number of processes for productization, and when a hard coat is applied, the polycarbonate resin becomes brittle and the like, which adversely affects the properties.

[0006] In recent years, a raw material that is not easily damaged but the damage that occurs naturally recovers, that is, a so-called self-repairing polymer has been reported. The self-repairing polymer disappears over time even if damage occurs, and thus the appearance is maintained for a long time.

[0007] However, in the past, a polycarbonate having self-repairing properties has not been proposed.

[0008] PRIOR ART DOCUMENTS

[0009] PATENT DOCUMENTS

[0010] Patent Document 1: Japanese Patent Application Laid-Open No. 2021-102739

[0011] Patent Document 2: Japanese Patent Application Laid-Open No. 2021-88651

[0012] Patent Document 3: Japanese Patent No. 5802495 SUMMARY

[0013] PROBLEMS TO BE SOLVED BY THE INVENTION

[0014] An object of the present application is to provide a polycarbonate resin composition and a molded article thereof, the polycarbonate resin composition of which is excellent in heat resistance and mechanical strength originally required for the polycarbonate resin and has self-repairing properties.

[0015] Solution to problem

[0016] The present inventors have found that by using a polycarbonate resin composition containing a carbonate structural unit derived from a specific aliphatic dihydroxy compound and a carbonate structural unit derived from a specific aromatic dihydroxy compound in a specific ratio, the polycarbonate resin has the property that damage by heat disappears and excellent properties of the polycarbonate resin such as heat resistance and mechanical strength can be maintained.

[0017] The gist of the present invention is the following [1] to

[14] .

[0018] [1] A polycarbonate resin composition comprising: a carbonate structural unit (X) derived from an aliphatic dihydroxy compound represented by at least one selected from the group consisting of the following formula (1), the following formula (2), and the following formula (8), and a carbonate structural unit (Y) derived from an aromatic dihydroxy compound represented by the following formula (3), wherein the content of the carbonate structural unit (X) in 100 mass% of the total carbonate structural units of the polycarbonate resin composition is 10 mass% or more and less than 26 mass%, and the content of the carbonate structural unit (Y) is more than 74 mass% and 90 mass% or less.

[0019] [Chemical Formula 1]

[0020]

[0021] (In the formula (1) and the formula (2), m is an integer of 2 or more.)

[0022] [Chemical Formula 2]

[0023]

[0024] (In the formula (8), A represents a divalent linking group not having a cyclic structure composed of 1 to 15 carbon atoms, 0 to 1 oxygen atom, and hydrogen atoms, and a plurality of A in the formula (8) are the same.

[0025] B represents a divalent linking group not having a cyclic structure composed of 1 to 40 carbon atoms and hydrogen atoms.

[0026] n is an integer of 2 to 100.)

[0027] [Chemical Formula 3]

[0028]

[0029] (In the formula (3), W 1 to W 4 each independently is a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, or an aryl group having 6 to 12 carbon atoms.

[0030] W 5 for -CR 1 R 2 -(R 1 and R 2 each independently is a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, or an aryl group having 6 to 12 carbon atoms) or a cycloalkylidene group having 3 to 10 carbon atoms.

[0031] [2] The polycarbonate resin composition according to [1], wherein the polycarbonate resin composition comprises a copolymer polycarbonate resin containing the carbonate structural unit (X) and the carbonate structural unit (Y).

[0032] [3] The polycarbonate resin composition according to [1] or [2], wherein the polycarbonate resin composition is a mixture of a polycarbonate resin containing the carbonate structural unit (X) and a polycarbonate resin containing the carbonate structural unit (Y).

[0033] [4] The polycarbonate resin composition according to any one of [1] to [3], wherein the content of the carbonate structural unit (X) in 100 mass% of the total carbonate structural units of the polycarbonate resin composition is less than 20 mass%.

[0034] [5] The polycarbonate resin composition according to any one of [1] to [4], wherein the aromatic dihydroxy compound represented by the formula (3) is an aromatic dihydroxy compound represented by the following formula (4) and / or the following formula (5).

[0035] [Chemical Formula 4]

[0036]

[0037] [6] The polycarbonate resin composition according to any one of [1] to [5], wherein the aliphatic dihydroxy compound represented by the formula (8) is an aliphatic polyester polyol represented by the following formula (9).

[0038] [Chemical Formula 5]

[0039]

[0040] (In the formula (9), n is an integer of 2 to 100.)

[0041] [7] The polycarbonate resin composition according to any one of [1] to [6], wherein the polycarbonate resin composition has a glass transition temperature of 110°C or lower.

[0042] [8] The polycarbonate resin composition according to any one of [1] to [7], wherein the number average molecular weight of the aliphatic dihydroxy compound represented by at least one of the group consisting of the formula (1), the formula (2), and the formula (8) is 20,000 or less.

[0043] [9] The polycarbonate resin composition according to any one of [1] to [8], wherein the tensile modulus of the polycarbonate resin composition is 100 MPa or more and 3,000 MPa or less.

[0044]

[10] The polycarbonate resin composition according to any one of [1] to [9], wherein the viscosity average molecular weight (Mv) of the polycarbonate resin composition is in the range of 13,000 to 32,000.

[0045]

[11] A molded article comprising the polycarbonate resin composition according to any one of [1] to

[10] .

[0046]

[12] An injection-molded article comprising the polycarbonate resin composition according to any one of [1] to

[10] .

[0047]

[13] An extrusion-molded article comprising the polycarbonate resin composition according to any one of [1] to

[10] .

[0048] Effects of the Invention

[0049] According to the present application, it is possible to provide a polycarbonate resin composition and a molded article thereof, which have excellent self-repairability, heat resistance, and mechanical strength. The polycarbonate resin composition of the present application has good self-repairability, heat resistance, and mechanical strength, and thus can be widely used in industrial fields such as interior parts for automobiles. DETAILED DESCRIPTION

[0050] Hereinafter, the present application will be described in detail with reference to embodiments and examples, etc. The present application is not limited to the embodiments and examples shown below.

[0051] In the present specification, unless otherwise specified, "~" is used in the meaning that the numerical value recited before and after it is included as a lower limit value and an upper limit value.

[0052] [Polycarbonate Resin Composition]

[0053] The polycarbonate resin composition of the present application is a polycarbonate resin composition comprising: a carbonate structural unit (X) (hereinafter, sometimes referred to simply as "carbonate structural unit (X)") derived from an aliphatic dihydroxy compound represented by at least one of the following formula (1), the following formula (2), and the following formula (8) (hereinafter, sometimes referred to as "specific aliphatic dihydroxy compound of the present application") and a carbonate structural unit (Y) (hereinafter, sometimes referred to simply as "carbonate structural unit (Y)") derived from an aromatic dihydroxy compound represented by the following formula (3) (hereinafter, sometimes referred to as "aromatic dihydroxy compound (3)"), the content of the carbonate structural unit (X) in the total carbonate structural units 100 mass% of the polycarbonate resin composition being 10 mass% or more and less than 26 mass%, the content of the carbonate structural unit (Y) being more than 74 mass% and 90 mass% or less.

[0054] [Chemical Formula 6]

[0055]

[0056] (In formula (1), formula (2), m is an integer of 2 or more.)

[0057] [Chemical Formula 7]

[0058]

[0059] (In formula (8), A represents a divalent linking group not having a cyclic structure composed of 1 to 15 carbon atoms, 0 to 1 oxygen atom, and hydrogen atoms, and a plurality of A in formula (8) are the same.

[0060] B represents a divalent linking group not having a cyclic structure composed of 1 to 40 carbon atoms and hydrogen atoms.

[0061] n is an integer of 2 to 100.)

[0062] [Chemical Formula 8]

[0063]

[0064] (In formula (3), W 1 ~W 4 Each independently is a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, or an aryl group having 6 to 12 carbon atoms.

[0065] W 5 is -CR 1 R 2 -(R 1 and R 2each independently is a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, or an aryl group having 6 to 12 carbon atoms) or a cycloalkylidene group having 3 to 10 carbon atoms.

[0066] Hereinafter, the content of the carbonate structural unit (X), the carbonate structural unit (Y), and other carbonate structural units is expressed as a weight percentage of 100 mass% with respect to all carbonate structural units in the polycarbonate resin composition.

[0067] By adopting a configuration such as the polycarbonate resin composition of the present application, the carbonate structural unit (X) derived from the specific aliphatic dihydroxy compound of the present application forms a soft segment, the carbonate structural unit (Y) derived from the aromatic dihydroxy compound (3) represented by the formula (3) forms a hard segment, whereby, by applying heat, it is possible to exhibit disappearance of a generated damage and to maintain shape self-repairability.

[0068] That is, by the soft segment formed of the carbonate structural unit (X), it is possible to obtain excellent self-repairability. Further, by the hard segment formed of the carbonate structural unit (Y), heat resistance and mechanical strength are also excellent. Therefore, it is possible to produce a polycarbonate resin composition and a molded article having heat resistance, mechanical strength, and self-repairability.

[0069] <Carbonate structural unit (X)>

[0070] The carbonate structural unit (X) contained in the polycarbonate resin composition of the present application is a carbonate structural unit derived from the specific aliphatic dihydroxy compound of the present application.

[0071] As A in the formula (8), from the viewpoint of polymerizability, a linear or branched alkylene group having 1 to 6 carbon atoms is preferred. As the branched chain, a branched alkylene group having 1 to 6 carbon atoms having a methyl group is preferred.

[0072] B in the formula (8) is preferably a linear alkylene group having 1 to 10 carbon atoms.

[0073] From the viewpoints of easiness of obtaining and polymerizability, the aliphatic polyester polyol represented by the formula (8) is preferably an aliphatic polyester polyol represented by the following formula (9).

[0074] [Chemical formula 9]

[0075]

[0076] (n is an integer of 2 to 100.)

[0077] The aliphatic polyester polyol represented by the above formula (9) preferably uses a biomass-derived aliphatic polyester polyol synthesized by condensing 3-methyl-1,5-pentanediol with sebacic acid manufactured from a plant-derived raw material.

[0078] Whether or not the aliphatic polyester polyol is manufactured from resources of plant origin can be confirmed, for example, by radiocarbon (14C) concentration measurement. 14 C) concentration measurement.

[0079] The number average molecular weight of the specific aliphatic dihydroxy compound of the present application is desirably 20,000 or less. The upper limit of the number average molecular weight of the specific aliphatic dihydroxy compound of the present application is more desirably 10,000 or less, and particularly desirably 5,000 or less. If the number average molecular weight of the specific aliphatic dihydroxy compound of the present application is the above upper limit or less, the compatibility with the aromatic dihydroxy compound (3) is good, and polymerization failure due to poor compatibility can be prevented.

[0080] On the other hand, the lower limit of the number average molecular weight of the specific aliphatic dihydroxy compound of the present application is not particularly limited, and is generally 200 or more, and desirably 400 or more, from the viewpoint of achieving both self-repairability and heat resistance.

[0081] Therefore, m in the formula (1), the formula (2), and n in the formula (8) are desirably numbers satisfying the above preferable range of the number average molecular weight.

[0082] Note that the number average molecular weight of the specific aliphatic dihydroxy compound of the present application can be calculated by a measurement method based on H-NMR. 1 H-NMR.

[0083] <Carbonate structural unit (Y)>

[0084] The carbonate structural unit (Y) contained in the polycarbonate resin composition of the present application is a carbonate structural unit derived from the aromatic dihydroxy compound (3).

[0085] In the formula (3), W 1 ~W 4 Each independently is a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, or an aryl group having 6 to 12 carbon atoms.

[0086] In the present application, the number of carbon atoms of an alkyl group or the like is the number of carbon atoms of the entire group including a substituent in the case where the alkyl group has a substituent.

[0087] Regarding the aryl group having 6 to 12 carbon atoms, the number of carbon atoms is the total of the number of carbon atoms of the substituent and the number of carbon atoms of the aryl group in the case where the aryl group has a substituent.

[0088] The alkyl group having 1 to 10 carbon atoms represented by W 1 ~W 4 may have a substituent. Furthermore, it can be linear, branched, or cyclic.

[0089] Examples of the substituent that the alkyl group may have include a halogen atom, a nitro group, a cyano group, a hydroxyl group, an aryl group, an alkoxy group, an aryloxy group, a carboxyl group, an alkoxycarbonyl group, an acyl group, and an acyloxy group.

[0090] As W in the formula (3) 1 ~W 4 Specific examples of the alkyl group having 1 to 10 carbon atoms include: methyl, ethyl, n-propyl, n-butyl, n-pentyl, n-hexyl, n-heptyl, n-octyl, n-nonyl, and n-decyl; methylethyl, methylpropyl, methylbutyl, methylpentyl, methylhexyl, methylheptyl, methyloctyl, and methylnonyl; dimethylethyl, dimethylpropyl, dimethylbutyl, dimethylpentyl, dimethylhexyl, dimethylheptyl, and dimethyloctyl; trimethylpropyl, trimethylbutyl, trimethylpentyl, trimethylhexyl, and trimethylheptyl; ethylbutyl, ethylpentyl, ethylhexyl, ethylheptyl, and ethyloctyl; cyclohexyl, methylcyclohexyl, dimethylcyclohexyl, trimethylcyclohexyl, tetramethylcyclohexyl, ethylcyclohexyl, diethylcyclohexyl, and methylethylcyclohexyl; and the like.

[0091] By W 1 ~W 4 The aryl group having 6 to 12 carbon atoms represented by may be unsubstituted or may have a substituent.

[0092] Examples of the substituent that the aryl group may have include a halogen atom, a nitro group, a cyano group, a hydroxyl group, an alkyl group, an alkoxy group, an aryloxy group, a carboxyl group, an alkoxycarbonyl group, an acyl group, and an acyloxy group.

[0093] As W in the formula (3) 1 ~W 4 Specific examples of the aryl group having 6 to 12 carbon atoms include phenyl, tolyl, naphthyl, and the like.

[0094] In the formula (3), W 5 -CR 1 R 2 -(R 1 and R 2 Each is independently a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms, or a cycloalkylidene group having 3 to 10 carbon atoms.

[0095] By W 5 Indicated by "-CR 1 R 2 -" in the R 1 and R 2 The hydrogen atom, the alkyl group having 1 to 10 carbon atoms or the aryl group having 6 to 12 carbon atoms and W 1 ~W 4The same applies to the carbon atom number 3 to 10 cycloalkyl group represented by W

[0096] The carbon atom number 3 to 10 cycloalkyl group represented by W 5 may have a branched structure, and in addition, can be unsubstituted or can have a substituent.

[0097] The substituent which the carbon atom number 3 to 10 cycloalkyl group represented by W 1 may have is the same as the substituent which the alkyl group represented by W 4 may have.

[0098] Specific examples of the carbon atom number 3 to 10 cycloalkyl group represented by W 5 include cyclopentylidene, cyclohexylidene, and the like.

[0099] Among them, it is preferable that W 1 to W 4 each independently be a hydrogen atom or a methyl group and W 5 be -CR 1 R 2 - (R 1 and R 2 each independently be a hydrogen atom or a methyl group), and it is more preferable that W 1 to W 4 each independently be a hydrogen atom or a methyl group and W 5 be 2,2-propylidene (-CR 1 R 2 - of R 1 and R 2 be a methyl group.

[0100] Specific examples of the aromatic dihydroxy compound represented by the formula (3) include 2,2-bis(4-hydroxyphenyl)propane (= bisphenol A) represented by the following formula (4) (hereinafter, sometimes abbreviated as "BPA"), 2,2-bis(4-hydroxy-3-methylphenyl)propane (= bisphenol C) represented by the following formula (5) (hereinafter, sometimes abbreviated as "BPC"), and the like.

[0101] [Chemical Formula 10]

[0102]

[0103] <Content form of carbonate structural unit (X) and carbonate structural unit (Y)>

[0104] The polycarbonate resin composition of the present application can contain the carbonate structural unit (X) and the carbonate structural unit (Y) in such a manner that the content ratio of the carbonate structural unit (X) and the carbonate structural unit (Y) becomes the aforementioned content ratio, and the content form of the carbonate structural unit (X) and the carbonate structural unit (Y) is not particularly limited.

[0105] Generally, the carbonate structural unit (X) and the carbonate structural unit (Y) are contained in the polycarbonate resin.

[0106] The polycarbonate resin composition of the present application can be a polycarbonate resin mixture (blend) of a polycarbonate resin containing the carbonate structural unit (X) and a polycarbonate resin containing the carbonate structural unit (Y), and can also be a polycarbonate resin composition containing a copolymerized polycarbonate resin containing both the carbonate structural unit (X) and the carbonate structural unit (Y).

[0107] The polycarbonate resin composition of the present application can be a mixture of a polycarbonate resin containing the carbonate structural unit (X) or the carbonate structural unit (Y) and a copolymerized polycarbonate resin containing both the carbonate structural unit (X) and the carbonate structural unit (Y), and can also be a mixture of a polycarbonate resin containing the carbonate structural unit (X), a polycarbonate resin containing the carbonate structural unit (Y), and a copolymerized polycarbonate resin containing both the carbonate structural unit (X) and the carbonate structural unit (Y). Furthermore, the polycarbonate resin composition of the present application can be a mixture of a polycarbonate resin containing the carbonate structural unit (X) and a polycarbonate resin containing the carbonate structural unit (Y); a polycarbonate resin composition of a copolymerized polycarbonate resin containing both the carbonate structural unit (X) and the carbonate structural unit (Y) and a polycarbonate resin containing neither the carbonate structural unit (X) nor the carbonate structural unit (Y).

[0108] Note that, in the present application, the "polycarbonate resin composition" includes both the concept of "a polycarbonate resin mixture containing a plurality of polycarbonate resins" and "a copolymerized polycarbonate resin".

[0109] In the case where the polycarbonate resin composition of the present application contains the carbonate structural unit (X) and the carbonate structural unit (Y) in the form of a copolymerized polycarbonate resin containing both the carbonate structural unit (X) and the carbonate structural unit (Y), the polycarbonate resin composition of the present application is also referred to as a "polycarbonate resin".

[0110] In the case where the polycarbonate resin composition of the present application is a mixture of a polycarbonate resin containing the carbonate structural unit (X) and a polycarbonate resin containing the carbonate structural unit (Y), it is generally referred to as a "polycarbonate resin composition". The same applies to the other forms described above.

[0111] In the present application, as such, the case where it is composed of one copolymerized polycarbonate resin containing both the carbonate structural unit (X) and the carbonate structural unit (Y) is also referred to as a "polycarbonate resin composition".

[0112] In Examples 1 to 8 and Comparative Examples 1 to 3 described later, a single copolymer polycarbonate resin was produced, and thus referred to as "polycarbonate resin" (the "polycarbonate resin" of the present application), which is also included in the polycarbonate resin composition of the present application.

[0113] <Content of each carbonate structural unit (X) and carbonate structural unit (Y)>

[0114] By containing the carbonate structural unit (X) and the carbonate structural unit (Y) and containing 10 mass% or more and less than 26 mass% of the carbonate structural unit (X), and containing more than 74 mass% and 90 mass% or less of the carbonate structural unit (Y), the polycarbonate resin composition of the present application can have good self-repairability, heat resistance, and mechanical strength.

[0115] From the viewpoint of self-repairability, the content of the carbonate structural unit (X) in the polycarbonate resin composition of the present application is 10 mass% or more, preferably 13 mass% or more, and more preferably 16 mass% or more. On the other hand, from the viewpoint of heat resistance and mechanical strength, the content of the carbonate structural unit (X) is less than 26 mass%, preferably less than 20 mass%, more preferably 19 mass% or less, and further preferably 18.5 mass% or less.

[0116] From the viewpoint of heat resistance and mechanical strength, the content of the carbonate structural unit (Y) in the polycarbonate resin composition of the present application is more than 74 mass%, preferably 80 mass% or more, more preferably 81 mass% or more, and further preferably 81.5 mass% or more. On the other hand, from the viewpoint of self-repairability, the content of the carbonate structural unit (Y) is 90 mass% or less, preferably 87 mass% or less, and more preferably 84 mass% or less.

[0117] The polycarbonate resin composition of the present application can contain only one kind of the carbonate structural unit (X), or can contain two or more kinds. That is, two or more kinds of the carbonate structural unit (X) derived from the specific aliphatic dihydroxy compound of the present application can be contained. One molecular weight level of the carbonate structural unit can be used, or two or more molecular weight levels of the carbonate structural unit can be used. In addition, with respect to the carbonate structural unit (Y), only one kind can be contained, or two or more kinds can be contained. That is, two or more kinds of the carbonate structural unit (Y) derived from the aromatic dihydroxy compound (3) can be contained.

[0118] As described above, the content of each of the carbonate structural units (X) and (Y) is a weight percentage with respect to 100 mass% of the total carbonate structural units in the polycarbonate resin composition.

[0119] Specifically, the content of each carbonate structural unit (X), (Y) in the polycarbonate resin composition of the present application can be calculated as the proportion of the carbonate unit derived from each dihydroxy compound, i.e., the carbonate unit derived from the specific aliphatic dihydroxy compound, the carbonate unit derived from the aromatic dihydroxy compound (3), among all the carbonate units derived from all the dihydroxy compounds used in the production of the polycarbonate resin composition of the present application, respectively.

[0120] The content of each carbonate structural unit (X), (Y) in the polycarbonate resin composition can be calculated by the measurement method of H-NMR based on 1 The measurement method of H-NMR is also the same for other carbonate structural units described later.

[0121] In the case where the carbonate structural unit (X) contains any one of the carbonate structural unit derived from the aliphatic dihydroxy compound represented by the formula (1), the structural unit derived from the aliphatic dihydroxy compound represented by the formula (2), and the carbonate structural unit derived from the aliphatic dihydroxy compound represented by the formula (8), the content of the carbonate structural unit (X) is the proportion of the amount of the one structural unit to 100 mass% of all the carbonate structural units in the polycarbonate resin composition of the present application. Further, in the case where the carbonate structural unit (X) contains two or more of the carbonate structural unit derived from the aliphatic dihydroxy compound represented by the formula (1), the structural unit derived from the aliphatic dihydroxy compound represented by the formula (2), and the carbonate structural unit derived from the aliphatic dihydroxy compound represented by the formula (8), the content of the carbonate structural unit (X) is the proportion of the total amount of the two structural units to 100 mass% of all the carbonate structural units in the polycarbonate resin composition of the present application. The same is also true in the case where the polycarbonate resin composition of the present application contains all of the carbonate structural unit derived from the aliphatic dihydroxy compound represented by the formula (1), the structural unit derived from the aliphatic dihydroxy compound represented by the formula (2), and the carbonate structural unit derived from the aliphatic dihydroxy compound represented by the formula (8). Likewise, in the case where two or more of the carbonate structural unit derived from the aliphatic dihydroxy compound represented by the formula (1), the carbonate structural unit derived from the aliphatic dihydroxy compound represented by the formula (2), and the carbonate structural unit derived from the aliphatic dihydroxy compound represented by the formula (8) are contained, the proportion of the total amount of these structural units is the content of the carbonate structural unit (X).

[0122] The same is also true for the carbonate structural unit (Y).

[0123] <Other carbonate structural units>

[0124] The polycarbonate resin composition of the present application can also contain, within a range not impairing the object of the present application, a carbonate structural unit other than the carbonate structural unit (X) and the carbonate structural unit (Y), i.e., a carbonate structural unit derived from an aromatic and / or aliphatic dihydroxy compound other than the specific aliphatic dihydroxy compound and the aromatic dihydroxy compound (3) of the present application (hereinafter, sometimes referred to as "other dihydroxy compound").

[0125] As to the other carbonate structural unit, it can also be contained in the form of a copolymerized polycarbonate resin of the carbonate structural unit (X) and / or the carbonate structural unit (Y), and a polycarbonate resin composed of the other carbonate structural unit can also be mixed with the polycarbonate resin containing the carbonate structural unit (X) and / or the carbonate structural unit (Y).

[0126] In the case where the polycarbonate resin composition of the present application contains the other carbonate structural unit, the content of the other carbonate structural unit in the total carbonate structural units 100 mass% of the polycarbonate resin composition is preferably 10 mass% or less, particularly preferably 5 mass% or less, and especially preferably 2 mass% or less.

[0127] By the polycarbonate resin composition containing the other carbonate structural unit, sometimes an improvement effect such as a reduction in water absorption rate derived from the other carbonate structural unit can be obtained, but when the content thereof is too much, the effects of the present application such as the improvement in self-repairability, heat resistance, and mechanical strength achieved by containing the carbonate structural unit (X) and the carbonate structural unit (Y) can be impaired.

[0128] The polycarbonate resin composition of the present application can contain only one kind of the other carbonate structural unit, or can contain two or more kinds thereof.

[0129] <Other Components>

[0130] The polycarbonate resin composition of the present application can contain, in addition to the polycarbonate resin containing the carbonate structural unit (X) and / or the carbonate structural unit (Y), other components as needed, provided that the desired properties are not significantly impaired. If examples of the other components are listed, polycarbonate resins not containing the carbonate structural unit (X) and the carbonate structural unit (Y) described above, resins other than polycarbonate resins, various resin additives, and the like can be listed.

[0131] As the other resins which can be contained in the polycarbonate resin composition of the present application, for example, the following can be listed: thermoplastic polyester resins such as polyethylene terephthalate resin, polypropylene terephthalate, polybutylene terephthalate resin, etc.; styrene-based resins such as polystyrene resin, high-impact polystyrene resin (HIPS), acrylonitrile-styrene copolymer (AS resin), acrylonitrile-styrene-acrylic rubber copolymer (ASA resin), acrylonitrile-ethylene propylene rubber-styrene copolymer (AES resin), etc.; polyethylene resin, polypropylene resin, etc., polyolefin resins; polyamide resin; polyimide resin; polyetherimide resin; polyurethane resin; polyphenylene ether resin; polyphenylene sulfide resin; polysulfone resin; polymethacrylate resin, etc.

[0132] The other resins can be contained singly or two or more kinds in any combination and ratio.

[0133] As the resin additives, for example, the following can be listed: heat stabilizer, antioxidant, mold release agent, light resistance agent (HALS), flame retardant, antistatic agent, antifog agent, lubricant, anti-blocking agent, flowability improver, plasticizer, dispersant, antibacterial agent, dye, pigment, etc.

[0134] These resin additives can be contained singly or two or more kinds in any combination and ratio.

[0135] <Stretching modulus of polycarbonate resin composition>

[0136] The stretching modulus of the polycarbonate resin composition of the present application is not particularly limited, and from the viewpoint of mechanical strength, it is preferably 100 MPa or greater and 3000 MPa or less, and particularly preferably 500 MPa or greater and 2500 MPa or less.

[0137] The stretching modulus of the polycarbonate resin composition of the present application is measured by the method described in the item of the Examples described later on a test sample which is produced by cutting a square tablet having a thickness of 0.5 mm and a length and width of 70 mm each, which is obtained by hot pressing, into a thickness of 0.5 mm, a length of 70 mm, and a width of 10 mm with scissors.

[0138] <Viscosity average molecular weight of polycarbonate resin composition>

[0139] The viscosity average molecular weight of the polycarbonate resin composition of the present application is not particularly limited, and from the viewpoint of mechanical strength, it is preferably 13000 or greater and 32000 or less, and particularly preferably 17000 or greater and 30000 or less.

[0140] The viscosity average molecular weight of the polycarbonate resin composition of the present application is measured by the method described in the item of the Examples described later on.

[0141] Glass transition temperature of polycarbonate resin composition

[0142] The glass transition temperature of the polycarbonate resin composition of the present application is not particularly limited, and is preferably -10°C or higher and 120°C or lower, more preferably 0°C or higher and 110°C or lower, and further preferably 10°C or higher and 100°C or lower.

[0143] The glass transition temperature of the polycarbonate resin composition of the present application is measured by the method described in the Examples below.

[0144] Method for producing polycarbonate resin composition

[0145] Method for producing polycarbonate resin

[0146] The polycarbonate resin constituting the polycarbonate resin composition of the present application can be produced by a polymerization method known in the art, which is not particularly limited. If examples of the polymerization method are given, the following can be given: interfacial polymerization method, melt ester exchange method, pyridine method, ring-opening polymerization method of cyclic carbonate compound, solid phase ester exchange method of prepolymer, and the like. Among them, the melt ester exchange method and the interfacial polymerization method are preferred. Hereinafter, a particularly preferred method among these methods will be described in detail.

[0147] (Interfacial polymerization method)

[0148] In the interfacial polymerization method, the raw material dihydroxy compound is reacted with a carbonate-forming compound in the presence of an organic solvent in which the reaction is not active and an aqueous base solution, generally with the pH maintained at 9 or higher, and then interfacial polymerization is performed in the presence of a polymerization catalyst, whereby a polycarbonate resin is obtained. In the reaction system, a molecular weight adjusting agent (end-capping agent) can be present as needed, and an antioxidant can be present in order to prevent oxidation of the raw material dihydroxy compound.

[0149] As the organic solvent in which the reaction is not active, there is no particular limitation, and the following can be given, for example: dichloromethane, 1,2-dichloroethane, chloroform, monochlorobenzene, dichlorobenzene, and the like chlorinated hydrocarbons; benzene, toluene, xylene, and the like aromatic hydrocarbons; and the like. The organic solvent can be used alone or two or more kinds can be used in any combination and ratio.

[0150] As the base compound contained in the aqueous base solution, there is no particular limitation, and the following can be given, for example: sodium hydroxide, potassium hydroxide, lithium hydroxide, alkali metal compounds such as sodium bicarbonate, and alkaline earth metal compounds. Among them, sodium hydroxide and / or potassium hydroxide are preferred. The base compound can be used alone or two or more kinds can be used in any combination and ratio.

[0151] There is no limitation on the concentration of the base compound in the aqueous alkali solution, and generally, in order to control the pH of the aqueous alkali solution to be 10 to 12, the base compound is used at a concentration of 5 to 10 mass%. For example, in the case of blowing phosgene, in order to control the pH of the water phase to be 10 to 12, preferably 10 to 11, the base compound is generally used at 1.9 mol or more, preferably 2.0 mol or more, per 1 mol of the raw material dihydroxy compound, and is generally used at 3.2 mol or less, preferably 2.5 mol or less.

[0152] By using a dihydroxy compound comprising the specific aliphatic dihydroxy compound of the present application and the aromatic dihydroxy compound (3) as the raw material dihydroxy compound, a copolymer polycarbonate resin comprising carbonate structural units (X) and carbonate structural units (Y) can be produced. By using the specific aliphatic dihydroxy compound of the present application, a polycarbonate resin comprising carbonate structural units (X) can be produced. By using the aromatic dihydroxy compound (3), a polycarbonate resin comprising carbonate structural units (Y) can be produced. In the case of producing a polycarbonate resin comprising other carbonate structural units, one or two or more kinds of dihydroxy compounds other than the specific aliphatic dihydroxy compound of the present application and the aromatic dihydroxy compound (3) can be used.

[0153] As the carbonate-forming compound, a carbonyl halide is preferably used, and phosgene is preferably used. The method in the case of using phosgene is particularly referred to as the phosgene method.

[0154] As the polymerization catalyst, there is no particular limitation, and for example, aliphatic tertiary amines such as trimethylamine, triethylamine, tributylamine, tripropylamine, trihexylamine, and the like; alicyclic tertiary amines such as N,N'-dimethylcyclohexylamine, N,N'-diethylcyclohexylamine, and the like; aromatic tertiary amines such as N,N'-dimethylaniline, N,N'-diethylaniline, and the like; quaternary ammonium salts such as trimethylbenzylammonium chloride, tetramethylammonium chloride, triethylbenzylammonium chloride, and the like; pyridine; guanine; salts of guanidine; and the like can be exemplified. The polymerization catalyst can be used singly or two or more kinds can be used in any combination and at any ratio.

[0155] As the molecular weight adjusting agent, there is no particular limitation, and for example, phenols having a monovalent phenolic hydroxyl group; aliphatic alcohols such as methanol, butanol, and the like; mercaptans; phthalimides; and the like can be exemplified. Among them, phenols are preferred.

[0156] As the phenol, specifically, there can be mentioned phenol, o-n-butylphenol, m-n-butylphenol, p-n-butylphenol, o-iso-butylphenol, m-iso-butylphenol, p-iso-butylphenol, o-t-butylphenol, m-t-butylphenol, p-t-butylphenol, o-n-pentylphenol, m-n-pentylphenol, p-n-pentylphenol, o-n-hexylphenol, m-n-hexylphenol, p-n-hexylphenol, p-t-octylphenol, o-cyclohexylphenol, m-cyclohexylphenol, p-cyclohexylphenol, o-phenylphenol, m-phenylphenol, p-phenylphenol, o-n-nonylphenol, m-n-nonylphenol, p-n-nonylphenol, o-cumylphenol, m-cumylphenol, p-cumylphenol, o-naphthylphenol, m-naphthylphenol, p-naphthylphenol, 2,5-di-t-butylphenol, 2,4-di-t-butylphenol, 3,5-di-t-butylphenol, 2,5-di-cumylphenol, 3,5-di-cumylphenol, p-cresol, bromophenol, tribromophenol, a monoalkylphenol having a linear or branched alkyl group having an average carbon atom number of 12 to 35 at the ortho, meta or para position, 9-(4-hydroxyphenyl)-9-(4-methoxyphenyl)fluorene, 9-(4-hydroxy-3-methylphenyl)-9-(4-methoxy-3-methylphenyl)fluorene, 4-(1-adamantyl)phenol, and the like. Among them, p-t-butylphenol, p-phenylphenol and p-cumylphenol are preferably used. One kind of the molecular weight adjusting agent can be used, or two or more kinds thereof can be used in any combination and ratio.

[0157] The amount of the molecular weight adjusting agent used is not particularly limited, and, for example, it is usually 0.5 mol or more, preferably 1 mol or more, and, in addition, it is usually 50 mol or less, preferably 30 mol or less, relative to 100 mol of the raw material dihydroxy compound.

[0158] As the antioxidant, there is no particular limitation, and for example, a hindered phenol-based antioxidant can be exemplified. As specific examples thereof, pentaerythritol tetrakis[3-(3,5-di-tert-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], N,N'-hexane-1,6-diylbis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionamide], 2,4-dimethyl-6-(1-methylpentadecyl)phenol, diethyl[[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]methyl]phosphonate, 3,3',3",5,5',5"-hexa-tert-butyl-a,a',a'-(mesitylene-2,4,6-methylphenyl)tri-p-cresol, 4,6-bis(octylthiomethyl) o-cresol, ethylene bis(oxyethylene)bis[3-(5-tert-butyl-4-hydroxy-m-tolyl)propionate], hexamethylene bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], 1,3,5-tris(3,5-di-tert-butyl-4-hydroxybenzyl)-1,3,5-triazine-2,4,6(1H,3H,5H)-trione, 2,6-di-tert-butyl-4-(4,6-bis(octylthio)-1,3,5-triazin-2-ylamino)phenol, 2-[1-(2-hydroxy-3,5-di-tert-pentylphenyl)ethyl]-4,6-di-tert-pentylphenyl acrylate, and the like can be exemplified.

[0159] Among them, pentaerythritol tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], octadecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate are preferred. As commercially available products of such phenol-based antioxidants, "IRGANOX (registered trademark) 1010", "IRGANOX (registered trademark) 1076" manufactured by BASF Co., "ADK STAB (registered trademark) AO-50", "ADK STAB (registered trademark) AO-60" manufactured by ADEKA Co., and the like can be exemplified. The antioxidant can be used singly, or two or more kinds can be used in any combination and ratio.

[0160] The use amount of the antioxidant is not particularly limited, and for example, it is usually 0.001 parts by mass or more, preferably 0.01 parts by mass or more, and more preferably 0.1 parts by mass or more, relative to 100 parts by mass of the raw material dihydroxy compound, and furthermore, it is usually 1 part by mass or less, and preferably 0.5 parts by mass or less. In the case where the use amount of the antioxidant is less than the lower limit value of the range, the effect as the antioxidant can be insufficient. In the case where the use amount of the antioxidant is more than the upper limit value of the range, gas can easily escape at the time of injection molding.

[0161] The order of mixing the reaction substrate (raw material), the reaction solvent (organic solvent), the catalyst, the additive, and the like at the time of the reaction is arbitrary as long as the desired polycarbonate resin is obtained, and an appropriate order can be arbitrarily set. For example, in the case where phosgene is used as the carbonate-forming compound, the molecular weight adjusting agent can be mixed at an arbitrary timing during the period from the reaction of the raw material dihydroxy compound with phosgene (phosgenation) to the start of the polymerization reaction.

[0162] The reaction temperature is not particularly limited and is usually 0 to 40°C. The reaction time is not particularly limited and is usually several minutes (for example, 10 minutes) to several hours (for example, 6 hours).

[0163] (Melt ester exchange method)

[0164] In the melt ester exchange method, for example, an ester exchange reaction of a carbonate with a raw material dihydroxy compound is performed. The raw material dihydroxy compound is the same as in the interfacial polymerization method.

[0165] As the carbonate, for example, a compound represented by the following formula (6) can be cited, and examples include diaryl carbonates, dialkyl carbonates, bis-carbonate esters of dihydroxy compounds, mono-carbonate esters of dihydroxy compounds, cyclic carbonate esters, and the like.

[0166] [Chemical Formula 11]

[0167]

[0168] In the formula (6), R 11 and R 12 each independently represent an alkyl group or an aryl group. The alkyl group and the aryl group represented by R 11 and R 12 may be unsubstituted or can have a substituent. The substituents that these substituents can have are the same as the substituents that the aryl group of R 13 and R 14 in the formula (7) shown below can have. Furthermore, the number of carbon atoms of the alkyl group represented by R 11 and R 12 is preferably 1 to 30. The number of carbon atoms of the aryl group represented by R 11 and R 12 is preferably 6 to 30, and more preferably 6 to 12.

[0169] Hereinafter, R 11 and R 12 are sometimes referred to as dialkyl carbonates when they are alkyl groups, and are sometimes referred to as diaryl carbonates when they are aryl groups.

[0170] Among them, from the viewpoint of reactivity with dihydroxy compounds, R 11 and R12 each independently an optionally substituted aryl group. The carbonate is more preferably an optionally substituted diaryl carbonate represented by the following formula (7).

[0171] [Chemical Formula 12]

[0172]

[0173] In the formula (7), R 13 and R 14 each independently a halogen atom, a nitro group, a cyano group, an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, a carboxylic acid group, an alkoxycarbonyl group having 2 to 20 carbon atoms, or an acyloxy group having 1 to 20 carbon atoms. p and q each independently represent an integer of 0 to 5.

[0174] The alkoxycarbonyl group is a group represented by -C(=0)-OR 20 (R 20 is an alkyl group), and specific examples thereof include a methoxycarbonyl group, an ethoxycarbonyl group, and the like. The acyloxy group is a group represented by -0-C(=0)-R 21 (R 21 is a hydrogen atom, an alkyl group, or an aryl group), and specific examples thereof include a formyloxy group, an acetyloxy group, and the like. p and q each independently preferably represent an integer of 0 to 3, and more preferably an integer of 0 to 2.

[0175] As the carbonate represented by the formula (6) and / or the formula (7), specifically, there can be mentioned: dialkyl carbonates such as dimethyl carbonate, diethyl carbonate, di-t-butyl carbonate, and the like; diaryl carbonates such as diphenyl carbonate (hereinafter sometimes abbreviated as "DPC"), bis(4-methylphenyl) carbonate, bis(4-chlorophenyl) carbonate, bis(4-fluorophenyl) carbonate, bis(2-chlorophenyl) carbonate, bis(2,4-difluorophenyl) carbonate, bis(4-nitrophenyl) carbonate, bis(2-nitrophenyl) carbonate, bis(methylsalicylphenyl) carbonate, and the like. Among them, diphenyl carbonate is preferred. These carbonates can be used singly or two or more kinds thereof can be used in any combination and ratio.

[0176] It is also possible to replace 50 mol% or less, further preferably 30 mol% or less, of the carbonate with a dicarboxylic acid or a dicarboxylic acid ester. As representative dicarboxylic acids or dicarboxylic acid esters, there can be mentioned terephthalic acid, isophthalic acid, terephthalic acid diphenyl ester, isophthalic acid diphenyl ester, and the like. In the case of replacement with such a dicarboxylic acid or a dicarboxylic acid ester, a polyester carbonate is obtained.

[0177] The ratio of the raw material dihydroxy compound to the carbonate is arbitrary as long as the desired polycarbonate resin is obtained, and these carbonates are preferably used in excess relative to the raw material dihydroxy compound when polymerized with the dihydroxy compound.

[0178] The amount of the carbonate used is preferably 1.01 to 1.30 mol, more preferably 1.01 to 1.20 mol, relative to 1 mol of the dihydroxy compound. When the mol ratio is too small, there is a tendency for the terminal OH group of the obtained polycarbonate resin to increase, and for the thermal stability of the resin to deteriorate. On the other hand, when the mol ratio is too large, the reaction rate of the transesterification decreases, and sometimes the production of a polycarbonate resin having a desired molecular weight becomes difficult; the amount of residual carbonate in the resin increases, and sometimes becomes a cause of odor during molding processing or when a molded product is produced.

[0179] When a polycarbonate resin is produced by the melt transesterification method, a transesterification catalyst is generally used. The transesterification catalyst is not particularly limited, and a conventionally known transesterification catalyst can be used. For example, an alkali metal compound and / or an alkaline earth metal compound is preferably used. An alkaline compound such as an alkaline boron compound, an alkaline phosphorus compound, an alkaline ammonium compound, an amine compound, or the like can be used in combination as an auxiliary. The transesterification catalyst can be used singly, or two or more kinds can be used in arbitrary combination and ratio.

[0180] In the melt transesterification method, the reaction temperature is not particularly limited, and is generally 100 to 300°C. The pressure during the reaction is not particularly limited, and is generally a reduced pressure condition of 2 Torr or less. As a specific operation, the melt polycondensation reaction is performed under the condition while removing a by-product.

[0181] The polycarbonate resin composition of the present application is significantly affected by heat history and oxidation in the presence of an alkali catalyst, resulting in deterioration of the color tone. Therefore, the reaction temperature is preferably set to 300°C or lower. In order to prevent oxygen from leaking from the equipment due to excessive reduction of the pressure, a reduced pressure condition in which the lower limit is set to around 0.05 Torr is preferably selected.

[0182] The reaction form can be performed by any of a batch method and a continuous method. In the case of being performed by the batch method, the order in which the reaction substrate (raw material), the catalyst, the additive, and the like are mixed is arbitrary as long as the desired polycarbonate resin is obtained, and an appropriate order can be arbitrarily set.

[0183] In the melt transesterification method, a catalyst deactivator can be used as needed. As the catalyst deactivator, a compound that neutralizes the transesterification catalyst can be arbitrarily used. If examples thereof are listed, acidic compounds containing sulfur and derivatives thereof, acidic compounds containing phosphorus and derivatives thereof, and the like can be listed. The catalyst deactivator can be used singly, or two or more kinds can be used in arbitrary combination and ratio.

[0184] The amount of the catalyst deactivator is not particularly limited, and is usually 0.5 equivalents or more, preferably 1 equivalent or more, more preferably 3 equivalents or more, and is usually 50 equivalents or less, preferably 10 equivalents or less, more preferably 8 equivalents or less, relative to the transesterification catalyst.

[0185] The amount of the catalyst deactivator is usually 1 ppm or more and 100 ppm or less, preferably 50 ppm or less, relative to the polycarbonate resin.

[0186] <Method for producing polycarbonate resin composition>

[0187] In the case where the polycarbonate resin composition of the present application is a mixture of a polycarbonate resin containing carbonate structural units (X) and a polycarbonate resin containing carbonate structural units (Y), or a mixture of a polycarbonate resin containing carbonate structural units (X) and / or carbonate structural units (Y) and a copolymer polycarbonate resin containing carbonate structural units (X) and carbonate structural units (Y), further, in the case where it is a polycarbonate resin composition containing two or more kinds of polycarbonate resins such as a mixture of a polycarbonate resin containing neither carbonate structural units (X) nor carbonate structural units (Y), there is no particular limitation on the method for producing the polycarbonate resin composition of the present application by mixing a plurality of polycarbonate resins, for example, two kinds of polycarbonate resins, polycarbonate resin (a) and polycarbonate resin (b), and the following methods 1) to 4) and the like can be exemplified.

[0188] 1) A method in which polycarbonate resin (a) and polycarbonate resin (b) are melt-kneaded.

[0189] 2) A method in which polycarbonate resin (a) in a molten state and polycarbonate resin (b) in a molten state are melt-kneaded.

[0190] 3) A method in which polycarbonate resin (a) and polycarbonate resin (b) are mixed in a solution state.

[0191] 4) A method in which polycarbonate resin (a) and polycarbonate resin (b) are dry-mixed.

[0192] Hereinafter, each method will be described.

[0193] 1) A method in which polycarbonate resin (a) and polycarbonate resin (b) are melt-kneaded.

[0194] The particles or granules of the polycarbonate resin (a) and the particles or granules of the polycarbonate resin (b) are melt-kneaded, for example, using a mixing device such as a kneader, a twin-screw extruder, a single-screw extruder, or the like. The particles or granules of the polycarbonate resin (a) and the particles or granules of the polycarbonate resin (b) can be mixed in advance in a solid state, and then kneaded, or either of them can be first melted using the mixing device, and the other polycarbonate resin is added thereto and kneaded.

[0195] The temperature at the time of kneading is not particularly limited, and is preferably 200°C or higher, more preferably 220°C or higher, and further preferably 230°C or higher. In addition, it is preferably 320°C or lower, and particularly preferably 300°C or lower. When the temperature at the time of kneading is low, the mixing of the polycarbonate resin (a) and the polycarbonate resin (b) is not complete, and when a molded product is produced, the hardness and the impact resistance can be uneven, which is not preferred. When the temperature at the time of kneading is excessively high, the color tone of the polycarbonate resin composition can deteriorate, which is not preferred.

[0196] 2) a method of melt-kneading the polycarbonate resin (a) in a molten state and the polycarbonate resin (b) in a molten state;

[0197] The polycarbonate resin (a) in a molten state and the polycarbonate resin (b) in a molten state are mixed, for example, using a mixing device such as a stirred tank, a static mixer, a kneader, a twin-screw extruder, a single-screw extruder, or the like. At this time, for example, if the polycarbonate resin is obtained by a melt polymerization method, it can be introduced into the above mixing device in a molten state without being cooled and solidified.

[0198] 3) a method of mixing the polycarbonate resin (a) and the polycarbonate resin (b) in a solution state;

[0199] is a method in which the polycarbonate resin (a) and the polycarbonate resin (b) are dissolved in a suitable solvent to produce a solution, and are mixed in a solution state, and then separated as a polycarbonate resin composition.

[0200] The particles or granules of the polycarbonate resin (a) and the particles or granules of the polycarbonate resin (b) can also be mixed in advance in a solid state, and then dissolved in a suitable solvent to produce a solution. Either of them can be first dissolved in a suitable solvent to produce a solution, and the other polycarbonate resin is added thereto to produce a solution.

[0201] As the suitable solvent, for example, aliphatic hydrocarbons such as hexane, n-heptane, and the like; chlorinated aliphatic hydrocarbons such as dichloromethane, chloroform, carbon tetrachloride, dichloroethane, trichloroethane, tetrachloroethane, dichloropropane, and 1,2-dichloroethylene, and the like; aromatic hydrocarbons such as benzene, toluene, and xylene, and the like; substituted aromatic hydrocarbons such as nitrobenzene and acetophenone, and the like; cyclic ethers such as tetrahydrofuran, and the like can be exemplified. Among them, for example, chlorinated hydrocarbons such as dichloromethane or chlorobenzene are preferably used. These solvents can be used alone or in the form of a mixture with other solvents.

[0202] As the mixing device, a stirring tank, a static mixer, and the like can be exemplified. As the mixing temperature, there is no particular restriction as long as it is a condition under which the polycarbonate resin (a) and the polycarbonate resin (b) are dissolved, and generally, it is carried out below the boiling point of the solvent used.

[0203] 4) a method of dry blending the polycarbonate resin (a) and the polycarbonate resin (b);

[0204] is a method of dry blending the polycarbonate resin (a) and the polycarbonate resin (b) using a tumbler, a super mixer, a Henschel mixer, a Nauta mixer, and the like.

[0205] Among the above-mentioned methods of 1) to 4), the methods of 1) and 2) of melt kneading the polycarbonate resin (a) and the polycarbonate resin (b), and the method of 4) of dry blending the polycarbonate resin (a) and the polycarbonate resin (b) are preferable.

[0206] In the production of the polycarbonate resin composition, in any of the above-mentioned methods, pigments, dyes, release agents, heat stabilizers, and the like can be appropriately added within a range not impairing the object of the present application.

[0207] [Shaped article]

[0208] The shaped article of the present application contains the polycarbonate resin composition of the present application, and is obtained using the polycarbonate resin composition of the present application. In the production of the shaped article from the polycarbonate resin composition of the present application, a general extrusion molding machine or an injection molding machine is used.

[0209] The molding temperature at the time of molding the polycarbonate resin composition of the present application is preferably 160°C or higher, more preferably 180°C or higher, and further preferably 200°C or higher. In addition, it is preferably 320°C or lower, and more preferably 300°C or lower. When the molding temperature is too low, the melt viscosity can become high, the flowability can decrease, and the moldability can decrease. When the molding temperature is too high, the polycarbonate resin composition can sometimes be colored, and the color tone of the obtained shaped article can also deteriorate, which is not preferable. In addition, the polycarbonate resin composition containing a structural unit derived from an aliphatic dihydroxy compound such as a carbonate structural unit (X) can sometimes be decomposed at a high temperature.

[0210] At the time of injection molding or extrusion molding, pigments, dyes, releasing agents, heat stabilizers, and the like can be appropriately added to the polycarbonate resin composition of the present application within a range not impairing the object of the present application.

[0211] <Injection molded article>

[0212] The injection molded article of the present application contains the polycarbonate resin composition of the present application, and is obtained using the polycarbonate resin composition of the present application. At the time of producing the injection molded article from the polycarbonate resin composition of the present application, a general injection molding machine is used.

[0213] The mold temperature in the case of using an injection molding machine or the like is preferably 120°C or lower, more preferably 90°C or lower. Furthermore, it is preferably 20°C or higher, more preferably 30°C or higher. When the mold temperature is too high, it is necessary to extend the cooling time at the time of molding, and sometimes the production cycle of the molded article becomes long, and the productivity decreases. When the mold temperature is too low, the melt viscosity of the polycarbonate resin composition becomes too high, and it can not be possible to obtain a uniform molded article, and problems such as unevenness on the surface of the molded article occur, and it is not preferable.

[0214] <Extrusion molded article>

[0215] The extrusion molded article of the present application contains the polycarbonate resin composition of the present application, and is obtained using the polycarbonate resin composition of the present application. At the time of producing the extrusion molded article from the polycarbonate resin composition of the present application, a general extrusion molding machine is used. A T-die, a round die, or the like is generally attached to this extrusion molding machine, and various shapes of extrusion molded articles can be obtained.

[0216] As the extrusion molded article, sheets, films, plates, tubes, pipes, and the like can be exemplified. Among these, sheets or films are preferable.

[0217] <Use>

[0218] The molded article of the polycarbonate resin composition of the present application is excellent in self-repairability, heat resistance, and mechanical strength, and thus can be used in various fields typified by the interior of a vehicle.

[0219] Examples

[0220] Hereinafter, the present application is further concretely explained based on examples. The present application is not limited to the following examples.

[0221] [Measurement and evaluation method]

[0222] The physical properties of the polycarbonate resin obtained in the following examples and comparative examples were measured and evaluated by the following methods.

[0223] (1) Glass transition temperature (Tg)

[0224] The measurement was performed using a differential scanning calorimeter (SII DSC6220). The obtained polycarbonate resin was used as a measurement sample without drying. An aluminum sample pan in which about 10 mg of the measurement sample was enclosed was heated from 30°C to 300°C at a temperature increase rate of 20°C / min under a nitrogen flow of 50 mL / min, and further, was cooled to -120°C at a temperature decrease rate of 40°C / min. Thereafter, the temperature was increased to 300°C again at a temperature increase rate of 20°C / min. The differential scanning calorimetry curve obtained in the second temperature increase was analyzed as a measurement curve. The glass transition temperature (Tg) was analyzed in accordance with JIS K7121-1987. The temperature at which the intersection of the tangent line drawn at the point where the gradient of the curve in the stepwise change portion of the glass transition was the largest was obtained by extending the baseline on the low temperature side to the high temperature side was taken as the extrapolated glass transition start temperature. This extrapolated glass transition temperature was taken as the glass transition temperature (Tg).

[0225] (2) Viscosity average molecular weight (Mv)

[0226] The obtained polycarbonate resin was dissolved in dichloromethane (concentration 6.0 g / L), and an Ubbelohde viscometer (manufactured by Sanko Rikagaku Kogyo Co., Ltd.) was used to obtain the intrinsic viscosity (limiting viscosity) [η] at 20°C (unit: dL / g), and the viscosity average molecular weight (Mv) was calculated according to the viscosity formula of Schnell (the following formula).

[0227] η = 1.23 x 10 -4 Mv 0.83

[0228] (3) Tensile modulus

[0229] The obtained polycarbonate resin was dried at 100°C for 3 hours or more. Using a spacer of SUS having a thickness of 0.5 mm, a length of 70 mm, and a width of 70 mm, 4 g of the dried polycarbonate resin was preheated at a hot press temperature of 200 to 240°C for 4 minutes, pre-pressed at a pressure of 2 MPa for 1 minute, and pressed at a pressure of 10 MPa for 1 minute by a hot press machine. Thereafter, it was taken out together with the spacer and cooled at room temperature to produce a tablet having a thickness of 0.5 mm. This tablet was cut into a test sample in the form of a long strip having a thickness of 0.5 mm, a length of 70 mm, and a width of 10 mm using scissors. With respect to the obtained test sample, a tensile test was performed using a table-top precision universal testing machine AUTOGRAPH AGS-X (manufactured by Shimadzu Corporation) at an initial chuck distance of 45 mm and an initial tensile speed of 1 mm / min. The tensile modulus was measured five times for a displacement of 0 to 0.3 mm, and the average value thereof was taken as the result. The higher the tensile modulus, the more excellent the mechanical strength.

[0230] (4) Self-repairability

[0231] Using a pencil hardness tester (TOYO SEIKI), a 4H pencil having a core length of 5 to 6 mm was applied to the test piece obtained by hot pressing described above to cause damage under a load of 750 g. This was heated in a drier (TOKYO RIKAKIKAI) at 100°C for 6 hours. The difference in damage between the test piece left at room temperature and the heated test piece was evaluated by visual observation and tactile sensation with a finger. If the damage of the heated sample disappeared, it was judged as "O", if the damage was reduced as recognized by tactile sensation with a finger, it was judged as "Δ", and if the damage was not reduced as recognized by tactile sensation with a finger, it was judged as "X". If it was "O" or "Δ", it was judged as having self-repairability.

[0232] (5) Heat resistance

[0233] In the self-repairability test described above, in the heated test piece, if there was no change, it was judged as "O", if it was slightly whitened and turbid, it was judged as "Δ", and if it was whitened and turbid, it was judged as "X". If it was "O" or "Δ", it was judged as having heat resistance.

[0234] [Raw materials]

[0235] The compounds used in the following examples and comparative examples are described by the following abbreviations. In addition, each compound used the compound of the following manufacturer.

[0236] [Diol compound]

[0237] • PO3G500: Polytrimethylene ether glycol, number average molecular weight 562 (manufactured by ALLESSA, trade name: VELVETOL (registered trademark)).

[0238] • PO3G1000: Polytrimethylene ether glycol, number average molecular weight 1069 (manufactured by ALLESSA, trade name: VELVETOL (registered trademark)).

[0239] • PO3G2700: Polytrimethylene ether glycol, number average molecular weight 2743 (manufactured by ALLESSA, trade name: VELVETOL (registered trademark)).

[0240] • PTMG1000: Polytetramethylene ether glycol, number average molecular weight 991 (manufactured by Mitsubishi Chemical).

[0241] • PTMG3000: Polytetramethylene ether glycol, number average molecular weight 2840 (manufactured by Mitsubishi Chemical).

[0242] • P-2050: aliphatic polyester polyol represented by the formula (9), number average molecular weight 1965 (manufactured by KURARAY Co., trade name: KURARAY Polyol).

[0243] • BPA: 2,2-bis(4-hydroxyphenyl)propane (= bisphenol A) (manufactured by Mitsubishi Chemical Co.).

[0244] • BPC: 2,2-bis(4-hydroxy-3-methylphenyl)propane (= bisphenol C) (manufactured by Hokoku Chemical Industry Co.).

[0245] <Carbonate>

[0246] • DPC: diphenyl carbonate (manufactured by Mitsubishi Chemical Co.).

[0247] <Polymerization catalyst>

[0248] • cesium carbonate (manufactured by KISHIDA Chemical Co.).

[0249] [Example 1]

[0250] Into a glass-made reactor having a reactor stirrer, a reactor heating device, and a reactor pressure adjusting device, and having a content volume of about 570 mL, PO3G2700: 15.5 g (about 5.6 mmol), BPA: 84.5 g (about 0.370 mol), and DPC: 84.6 g (about 0.402 mol) were added, and a 0.04 wt% aqueous solution of cesium carbonate as a catalyst was added in such a manner that 1.00 μmol of cesium carbonate per 1 mol of total dihydroxy compound was added, to thereby prepare a raw material mixture.

[0251] Next, the inside of the glass-made reactor was depressurized to about 100 Pa, and then pressurized to atmospheric pressure with nitrogen, and the nitrogen replacement was performed three times. After the nitrogen replacement, the temperature outside the reactor was set to 220°C, and the temperature inside the reactor was gradually increased, and the mixture was dissolved. Thereafter, the stirrer was rotated at 100 rpm. Then, while distilling and removing phenol as a by-product of the oligomerization reaction of the dihydroxy compound and DPC performed inside the reactor, the pressure inside the reactor was depressurized from 101.3 kPa (760 Torr) to 13.3 kPa (100 Torr) in absolute pressure over 40 minutes.

[0252] Next, the pressure in the reactor was maintained at 13.3 kPa, while further distilling off phenol, while the transesterification reaction was carried out for 65 minutes. The reactor's external temperature was then raised to 260°C over 15 minutes, and the pressure in the reactor was further reduced from 13.3 kPa (100 Torr) to 399 Pa (3 Torr) absolute pressure over 40 minutes, removing the distilled phenol from the system. The absolute pressure in the reactor was then reduced to approximately 60 Pa (approximately 0.4 Torr) to allow the polycondensation reaction to proceed. The rotational speed of the stirrer was decreased as the reaction time elapsed, and the polycondensation reaction was terminated when the stirrer in the reactor reached a predetermined stirring power.

[0253] Next, the reactor was re-pressurized to 101.3 kPa absolute with nitrogen and then increased to 0.1 MPa gauge pressure. Polycarbonate resin was extracted from the bottom of the reactor in the form of strands. The obtained strands were pelletized using a rotary cutter.

[0254] Table 1 shows the content ratio of the carbonate structural unit (X) to the carbonate structural unit (Y) in the obtained copolycarbonate resin, which was calculated based on the charge amount of the raw material dihydroxy compound.

[0255] The obtained polycarbonate resin was subjected to various evaluations in the above-mentioned procedure. The results are shown in Table 1.

[0256] [Example 2]

[0257] The method described in Example 1 was followed, except that 19.7 g (about 7.2 mmol) of PO3G2700, 80.3 g (about 0.352 mol) of BPA, and 80.7 g (about 0.377 mol) of DPC were added, and a 0.04 wt% aqueous solution of cesium carbonate was added as a catalyst so that 1.0 μmol of cesium carbonate was added per 1 mol of all dihydroxy compounds to prepare a raw material mixture.

[0258] The obtained polycarbonate resin was subjected to various evaluations in the above-mentioned procedure. The results are shown in Table 1.

[0259] [Example 3]

[0260] The method described in Example 1 was followed, except that 32.5 g (about 11.9 mmol) of PO3G2700, 87.5 g (about 0.383 mol) of BPA, and 89.0 g (about 0.415 mol) of DPC were added, and a 0.04 wt% aqueous solution of cesium carbonate was added as a catalyst so that 1.0 μmol of cesium carbonate was added per 1 mol of all dihydroxy compounds to prepare a raw material mixture.

[0261] With respect to the obtained polycarbonate resin, each evaluation was carried out in the order described above. The results are shown in Table 1.

[0262] [Example 4]

[0263] A raw material mixture was prepared by adding PO3G2700: 17.9 g (about 6.5 mmol), BPC: 82.1 g (about 0.320 mol), DPC: 70.7 g (about 0.330 mol) and adding a 0.04 wt% aqueous solution of cesium carbonate as a catalyst in such a manner that 1.0 μmol of cesium carbonate per 1 mol of the total dihydroxy compound was added, and a raw material mixture was prepared, and otherwise, the method described in Example 1 was carried out.

[0264] With respect to the obtained polycarbonate resin, each evaluation was carried out in the order described above. The results are shown in Table 1.

[0265] [Example 5]

[0266] A raw material mixture was prepared by adding PO3G1000: 19.4 g (about 18.6 mmol), BPA: 80.6 g (about 0.353 mol), DPC: 83.6 g (about 0.390 mol) and adding a 0.04 wt% aqueous solution of cesium carbonate as a catalyst in such a manner that 1.0 μmol of cesium carbonate per 1 mol of the total dihydroxy compound was added, and a raw material mixture was prepared, and otherwise, the method described in Example 1 was carried out.

[0267] With respect to the obtained polycarbonate resin, each evaluation was carried out in the order described above. The results are shown in Table 1.

[0268] [Example 6]

[0269] A raw material mixture was prepared by adding PO3G500: 17.6 g (about 31.4 mmol), BPA: 82.4 g (about 0.361 mol), DPC: 88.2 g (about 0.412 mol) and adding a 0.04 wt% aqueous solution of cesium carbonate as a catalyst in such a manner that 1.0 μmol of cesium carbonate per 1 mol of the total dihydroxy compound was added, and a raw material mixture was prepared, and otherwise, the method described in Example 1 was carried out.

[0270] With respect to the obtained polycarbonate resin, each evaluation was carried out in the order described above. The results are shown in Table 1.

[0271] [Example 7]

[0272] A raw material mixture was prepared by adding P-2050: 29.2 g (about 14.8 mmol), BPA: 87.5 g (about 0.383 mol), DPC: 90.4 g (about 0.422 mol) and adding cesium carbonate 0.04 wt% aqueous solution as a catalyst in such a manner that cesium carbonate becomes 1.0 μmol per 1 mol of the total dihydroxy compound, and the method described in Example 1 was carried out except for this.

[0273] With respect to the obtained polycarbonate resin, each evaluation was carried out in the order described above. The results are shown in Table 1.

[0274] [Example 8]

[0275] A raw material mixture was prepared by adding P-2050: 29.2 g (about 14.8 mmol), BPA: 87.5 g (about 0.383 mol), DPC: 90.4 g (about 0.422 mol) and adding cesium carbonate 0.04 wt% aqueous solution as a catalyst in such a manner that cesium carbonate becomes 1.0 μmol per 1 mol of the total dihydroxy compound, and the method described in Example 1 was carried out except for this.

[0276] With respect to the obtained polycarbonate resin, each evaluation was carried out in the order described above. The results are shown in Table 1.

[0277] [Comparative Example 1]

[0278] A raw material mixture was prepared by adding P-2050: 29.2 g (about 14.8 mmol), BPA: 87.5 g (about 0.383 mol), DPC: 90.4 g (about 0.422 mol) and adding cesium carbonate 0.04 wt% aqueous solution as a catalyst in such a manner that cesium carbonate becomes 1.0 μmol per 1 mol of the total dihydroxy compound, and the method described in Example 1 was carried out except for this.

[0279] With respect to the obtained polycarbonate resin, each evaluation was carried out in the order described above. The results are shown in Table 2.

[0280] [Comparative Example 2]

[0281] A raw material mixture was prepared by adding P-2050: 29.2 g (about 14.8 mmol), BPA: 87.5 g (about 0.383 mol), DPC: 90.4 g (about 0.422 mol) and adding cesium carbonate 0.04 wt% aqueous solution as a catalyst in such a manner that cesium carbonate becomes 1.0 μmol per 1 mol of the total dihydroxy compound, and the method described in Example 1 was carried out except for this.

[0282] With respect to the obtained polycarbonate resin, each evaluation was carried out in the order described above. The results are shown in Table 2.

[0283] [Comparative Example 3]

[0284] A raw material mixture was prepared by adding PO3G2700: 46.5 g (about 16.9 mmol), BPA: 73.5 g (about 0.322 mol), DPC: 76.2 g (about 0.356 mol), and cesium carbonate 0.04 wt% aqueous solution as a catalyst in such a manner that 1.0 μmol of cesium carbonate per 1 mol of the total dihydroxy compound was added, and the method described in Example 1 was carried out except for this.

[0285] With respect to the obtained polycarbonate resin, each evaluation was carried out in the order described above. The results are shown in Table 2.

[0286] [Comparative Example 4]

[0287] A raw material mixture was prepared by adding PO3G500: 35.4 g (about 62.9 mmol), BPA: 81.4 g (about 0.356 mol), DPC: 94.3 g (about 0.440 mol), and cesium carbonate 0.04 wt% aqueous solution as a catalyst in such a manner that 1.0 μmol of cesium carbonate per 1 mol of the total dihydroxy compound was added, and the method described in Example 1 was carried out except for this.

[0288] With respect to the obtained polycarbonate resin, each evaluation was carried out in the order described above. The results are shown in Table 2.

[0289] [Comparative Example 5]

[0290] With respect to bisphenol A polycarbonate (Mitsubishi Engineering-Plastics Corporation, trade name NOVAREX (registered trademark) 7022J), each evaluation was carried out in the order described above. The results are shown in Table 2.

[0291] [Comparative Example 6]

[0292] A raw material mixture was prepared by adding BPC: 100 g (about 0.390 mol), DPC: 86.1 g (about 0.402 mol), and cesium carbonate 0.04 wt% aqueous solution as a catalyst in such a manner that 1.5 μmol of cesium carbonate per 1 mol of the total dihydroxy compound was added. The temperature outside the reactor after warming from 220°C was changed from 260°C to 250°C, and the temperature was raised to 285°C in 10 minutes after 40 minutes from the end of the pressure reduction, and the reaction was carried out at 285°C until the polymerization ended, and the method described in Example 1 was carried out except for this.

[0293] With respect to the obtained polycarbonate resin, each evaluation was carried out in the order described above. The results are shown in Table 2.

[0294] [Table 1]

[0295]

[0296] [Table 2]

[0297]

[0298] [Example 9]

[0299] The polycarbonate resin (PC1) 4.2 g, the bisphenol A polycarbonate (Mitsubishi Engineering-Plastics Corporation, trade name NOVAREX (registered trademark) 7022J) (PC2) 2.8 g, which were produced in Comparative Example 4, were dissolved with dichloromethane 60 mL, and the dichloromethane was volatilized by drying at room temperature for 12 hours. Further, drying was carried out with a hot air drier at 100°C for 1 hour. The dried polycarbonate resin composition was heat-pressed by the above-described method, and a test piece having a thickness of 0.5 mm, a length of 70 mm, and a width of 70 mm was obtained.

[0300] The content ratio of the carbonate structural unit (X) and the carbonate structural unit (Y) in the polycarbonate resin composition was each as shown in Table 3.

[0301] With respect to the polycarbonate resin composition, each evaluation was carried out in the order described above. The results are shown in Table 3. Note that with respect to the viscosity average molecular weight (Mv), the glass transition temperature, the evaluation was carried out using the test piece after heat pressing.

[0302] [Table 3]

[0303]

[0304]

[0305] [Investigation]

[0306] From the above results, the following was found.

[0307] From Table 1, in Examples 1 to 8, the content ratio of the carbonate structural unit (X) was 10 mass% or more and less than 26 mass%, and the content ratio of the carbonate structural unit (Y) was more than 74 mass% and 90 mass% or less, and thus the self-repairability, the heat resistance, and the mechanical strength were all good results.

[0308] Comparative Example 1 having too small a content ratio of carbonate structural unit (X) does not have self-repairability although having carbonate structural unit (X) and carbonate structural unit (Y). Comparative Examples 2, 3, 4 having too large a content of carbonate structural unit (X) have poor results in heat resistance.

[0309] Comparative Examples 5 and 6 are a general BPA polycarbonate resin and a BPC polycarbonate resin, respectively, and do not have self-repairability.

[0310] As shown in Table 3, it is known that the polycarbonate resin composition of the present application containing carbonate structural unit (X) and carbonate structural unit (Y) at a prescribed content ratio is not limited to a copolymer polycarbonate resin, but can be a polycarbonate resin composition containing carbonate structural unit (X) and carbonate structural unit (Y) in the form of a mixture of two polycarbonate resins.

[0311] As described above, it is known that the polycarbonate resin of Examples 1 to 9 as the polycarbonate resin composition of the present application is excellent in self-repairability, heat resistance, and mechanical strength compared to the polycarbonate resins of Comparative Examples 1 to 5.

[0312] The present application has been described in detail using specific examples, but it is obvious for those skilled in the art that various modifications can be made within the scope of the effect of the present application.

[0313] This application is based on Japanese Patent Application 2023-054759 filed on March 30, 2023, the contents of which are hereby incorporated by reference.

Claims

1. A polycarbonate resin composition, wherein The present invention comprises a carbonate structural unit (X) derived from an aliphatic dihydroxy compound represented by at least one of the group consisting of the following formula (1), the following formula (2), and the following formula (8), and a carbonate structural unit (Y) derived from an aromatic dihydroxy compound represented by the following formula (3). The content of the carbonate structural unit (X) in 100% by mass of all carbonate structural units in the polycarbonate resin composition is 10% by mass or more and less than 26% by mass, and the content of the carbonate structural unit (Y) is greater than 74% by mass and less than 90% by mass, [Chemical Formula 1] In formula (1) and formula (2), m is an integer greater than or equal to 2. [Chemical Formula 2] In formula (8), A represents a divalent linking group having no cyclic structure and composed of 1 to 15 carbon atoms, 0 to 1 oxygen atoms, and hydrogen atoms. A plurality of A's in formula (8) are the same. B represents a divalent linking group composed of 1 to 40 carbon atoms and hydrogen atoms and having no cyclic structure, n is an integer from 2 to 100, [Chemical Formula 3] In formula (3), W 1 ~W 4 are each independently a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, or an aryl group having 6 to 12 carbon atoms, W 5 -CR 1 R 2 - or a cycloalkylidene group having 3 to 10 carbon atoms, wherein R 1 and R 2 Each is independently a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, or an aryl group having 6 to 12 carbon atoms.

2. The polycarbonate resin composition according to claim 1, wherein The polycarbonate resin composition includes a copolymerized polycarbonate resin containing the carbonate structural unit (X) and the carbonate structural unit (Y).

3. The polycarbonate resin composition according to claim 1, wherein The polycarbonate resin composition is a mixture of a polycarbonate resin containing the carbonate structural unit (X) and a polycarbonate resin containing the carbonate structural unit (Y).

4. The polycarbonate resin composition according to claim 1, wherein The content of the carbonate structural unit (X) in 100% by mass of all carbonate structural units in the polycarbonate resin composition is less than 20% by mass.

5. The polycarbonate resin composition according to claim 1, wherein The aromatic dihydroxy compound represented by the formula (3) is an aromatic dihydroxy compound represented by the following formula (4) and / or the following formula (5): [Chemical Formula 4] The polycarbonate resin composition according to claim 1 , wherein The aliphatic dihydroxy compound represented by the above formula (8) is an aliphatic polyester polyol represented by the following formula (9), [Chemical Formula 5] In formula (9), n is an integer from 2 to 100.

7. The polycarbonate resin composition according to claim 1, wherein The polycarbonate resin composition has a glass transition temperature of 110° C. or lower.

8. The polycarbonate resin composition according to claim 1, wherein The number average molecular weight of the aliphatic dihydroxy compound represented by at least one of the group consisting of the above formula (1), the above formula (2), and the above formula (8) is 20,000 or less.

9. The polycarbonate resin composition according to claim 1, wherein The polycarbonate resin composition has a tensile modulus of 100 MPa or more and 3000 MPa or less.

10. The polycarbonate resin composition according to claim 1, wherein The viscosity average molecular weight Mv of the polycarbonate resin composition is in the range of 13,000 to 32,000. 11 . A molded article comprising the polycarbonate resin composition according to claim 1 . 12 . An injection-molded article comprising the polycarbonate resin composition according to claim 1 . 13 . An extrusion-molded article comprising the polycarbonate resin composition according to claim 1 .

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