Resin composition and molded article

Abstract

To provide a resin composition obtained by compounding a polycarbonate resin with an acrylic resin through a reactive compatibilizer, the resin composition ensuring quality stability while having superior mechanical properties and moldability.SOLUTION: A resin composition comprising a polycarbonate resin (A), an acrylic resin (B), and a copolymer (C), wherein the copolymer (C) has a polymer chain (c1) and a polymer chain (c2), the polymer chain (c1) being a polymer chain exhibiting compatibility with the acrylic resin (B), and the polymer chain (c2) being a polymer chain containing 0.001 mass% or more and 50 mass% or less of a vinyl monomer unit having an epoxy group in a side chain.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a resin composition containing a polycarbonate resin and an acrylic resin, and a molded article made using the same. [Background technology]

[0002] Polycarbonate resins are generally produced using raw materials derived from petroleum resources. However, in recent years, due to concerns about the depletion of petroleum resources, development of polycarbonate resins made from biomass resources using plant-derived monomers as raw materials has been promoted. For example, polycarbonate resins produced using isosorbide (ISB) as a plant-derived monomer have been developed and are beginning to be used in automotive parts, optical applications, and as a glass replacement (see, for example, Patent Documents 1 and 2).

[0003] Polycarbonate resins obtained from ISB not only have excellent optical properties, but also have better weather resistance and surface hardness than conventional aromatic polycarbonate resins, and are therefore being used outdoors and as a replacement for glass. However, a material that meets all of the properties required for these applications has yet to be found, and various methods for improving properties without compromising advantages such as weather resistance and transparency have been explored. For example, Patent Document 3 reports a case in which scratch resistance and optical properties (low birefringence) were improved by combining ISB with acrylic resin, a transparent resin that also has excellent weather resistance. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2004 / 111106 [Patent Document 2] International Publication No. 2007 / 148604 [Patent Document 3] Patent Publication No. 2021-88651 Summary of the Invention [Problem to be solved by the invention]

[0005] Polycarbonate resin and acrylic resin are thermodynamically incompatible, and as a result of poor interfacial interaction, there have been issues with reduced mechanical properties of molded bodies and reduced viscosity during melting, which can impair moldability. Furthermore, when combining incompatible resins, a common method is to use a reactive compatibilizer to improve compatibility, but this tends to leave reactive groups after mixing, impairing the quality stability of the molding material.

[0006] An object of the present invention is to provide a resin composition which is excellent in mechanical properties and moldability while maintaining stable quality, by compounding a polycarbonate resin and an acrylic resin using a reactive compatibilizer. [Means for solving the problem]

[0007] As a result of extensive research, the present inventors have found that the above object can be achieved by blending a specific copolymer as a reactive compatibilizer in an appropriate blending amount with a polycarbonate resin and an acrylic resin.

[0008] That is, the gist of the present invention is as follows.

[0009] Aspect 1 of the present invention is The composition comprises a polycarbonate resin (A), an acrylic resin (B), and a copolymer (C), The present invention relates to a resin composition, wherein the copolymer (C) has the following polymer chain (c1) and polymer chain (c2). Polymer chain (c1): A polymer chain that is compatible with the acrylic resin (B). Polymer chain (c2): A polymer chain containing 0.001% by mass or more and 50% by mass or less of vinyl monomer units having an epoxy group in the side chain.

[0010] Aspect 2 of the present invention is a resin composition according to aspect 1, The resin composition comprises the copolymer (C) in an amount of 0.1% by mass or more and 20% by mass or less relative to 100% by mass of the total of the polycarbonate resin (A) and the acrylic resin (B).

[0011] Aspect 3 of the present invention is a resin composition according to aspect 1 or 2, The present invention relates to a resin composition, wherein the polymer chain (c1) contains 80% by mass or more and 100% by mass or less of methyl methacrylate monomer units.

[0012] A fourth aspect of the present invention relates to a resin composition according to any one of the first to third aspects, The present invention relates to a resin composition, wherein the polycarbonate resin (A) has a structural unit derived from a compound represented by the following formula (1):

[0013] [ka]

[0014] A fifth aspect of the present invention relates to a resin composition according to any one of the first to fourth aspects, The present invention relates to a resin composition, wherein the acrylic resin (B) contains 80% by mass or more and 100% by mass or less of methyl methacrylate monomer units.

[0015] A sixth aspect of the present invention relates to a resin composition according to any one of the first to fifth aspects, The present invention relates to a resin composition, wherein the copolymer (C) is a block copolymer and / or a graft copolymer.

[0016] A seventh aspect of the present invention is a resin composition according to any one of the first to sixth aspects, The present invention relates to a resin composition, wherein the copolymer (C) is a macromonomer copolymer composed of a polymer chain (c1) derived from a macromonomer represented by the following general formula (2) and a polymer chain (c2) derived from a comonomer copolymerizable with the macromonomer:

[0017] [ka]

[0018] (In general formula (2), R 0 ~Rn are each independently a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group, or a heterocyclic group. 1 ~X n are each independently a hydrogen atom or a methyl group. Z is a terminal group. n is a natural number from 2 to 10,000.

[0019] Aspect 8 of the present invention is The present invention relates to a molded article made of the resin composition according to any one of the first to seventh aspects. [Effects of the Invention]

[0020] According to the resin composition of the present invention, a composite of polycarbonate resin and acrylic resin having excellent moldability and mechanical properties can be obtained without impairing the quality stability. DETAILED DESCRIPTION OF THE INVENTION

[0021] In the present invention, the term "structural unit" refers to a chemical structure formed directly from a monomer by a polymerization reaction, and a chemical structure in which a part of the structure of the structural unit contained in the polymer obtained by the polymerization reaction is converted into another structure by treating the polymer with a chemical reaction. The term "monomer" refers to a compound having polymerizability (polymerizable monomer), and is also called a "monomer." "(Meth)acrylate" is a general term for acrylate and methacrylate.

[0022] The resin composition of the present invention contains a polycarbonate resin (A), an acrylic resin (B), and a copolymer (C). Here, the copolymer (C) has the following polymer chains (c1) and (c2). Polymer chain (c1): A polymer chain that is compatible with the acrylic resin (B). Polymer chain (c2): A polymer chain containing 0.001% by mass or more and 50% by mass or less of vinyl monomer units having an epoxy group in the side chain.

[0023] [Polycarbonate resin (A)] There is no particular limitation on the type of polycarbonate resin used in the present invention, and the polycarbonate resin may be used alone or in any combination of two or more types.

[0024] Polycarbonate resins are polymers with carbonate bonds represented by the general formula -[-OXOC(=O)-]-, where X is generally a hydrocarbon group but may contain heteroatoms to impart various properties.

[0025] Polycarbonate resins can be classified into aromatic polycarbonate resins in which the carbons directly bonded to the carbonate bonds are aromatic carbons, and aliphatic polycarbonate resins in which the carbons directly bonded to the carbonate bonds are aliphatic carbons, and either can be used. From the viewpoint of weather resistance, aliphatic polycarbonate resins are preferred, and aliphatic polycarbonate resins containing alicyclic dihydroxy compounds are more preferred, while aromatic polycarbonate resins are preferred from the viewpoints of heat resistance, mechanical properties, electrical properties, etc.

[0026] There are no particular limitations on the specific type of polycarbonate resin, but examples include polycarbonate polymers obtained by reacting an aromatic dihydroxy compound, an aliphatic dihydroxy compound, an alicyclic dihydroxy compound, an ether-containing dihydroxy compound, a cyclic ether, or the like with a carbonate precursor. The polycarbonate polymer may be linear or branched. The polycarbonate polymer may be a homopolymer consisting of one type of repeating unit, or a copolymer having two or more types of repeating units. In this case, the copolymer may be selected from various copolymerization forms, such as a random copolymer or a block copolymer. Generally, such a polycarbonate polymer is a thermoplastic resin.

[0027] Examples of aromatic dihydroxy compounds that can be used as raw materials for aromatic polycarbonate resins include the following compounds.

[0028] 2,2-bis(4-hydroxyphenyl)propane, 2,2-bis(3-methyl-4-hydroxyphenyl)propane, 2,2-bis(4-hydroxy-3,5-dimethylphenyl)propane, 2,2-bis(4-hydroxy-3,5-diethylphenyl)propane, 2,2-bis(4-hydroxy-(3-phenyl)phenyl)propane, 2,2-bis(4-hydroxy-(3,5-diphenyl)phenyl)propane, 2,2-bis(4-hydroxy-3,5-dibromophenyl)propane, bis(4-hydroxyphenyl)methane, 1,1-bis(4-hydroxyphenyl)ethane, 2,2-bis(4-hydroxyphenyl)butane, 2,2-bis(4-hydroxyphenyl)pentane, 1,1-bis(4-hydroxyphenyl)-1-phenylethane, bis(4-hydroxyphenyl)diphenylmethane, 1,1-bis(4-hydroxyphenyl)-2 aromatic bisphenol compounds such as -ethylhexane, 1,1-bis(4-hydroxyphenyl)decane, bis(4-hydroxy-3-nitrophenyl)methane, 3,3-bis(4-hydroxyphenyl)pentane, 1,3-bis(2-(4-hydroxyphenyl)-2-propyl)benzene, 1,3-bis(2-(4-hydroxyphenyl)-2-propyl)benzene, 2,2-bis(4-hydroxyphenyl)hexafluoropropane, 1,1-bis(4-hydroxyphenyl)cyclohexane, bis(4-hydroxyphenyl)sulfone, 2,4'-dihydroxydiphenyl sulfone, bis(4-hydroxyphenyl)sulfide, bis(4-hydroxy-3-methylphenyl)sulfide, bis(4-hydroxyphenyl)disulfide, 4,4'-dihydroxydiphenyl ether, and 4,4'-dihydroxy-3,3'-dichlorodiphenyl ether; dihydroxy compounds having an ether group bonded to an aromatic group, such as 2,2-bis(4-(2-hydroxyethoxy)phenyl)propane, 2,2-bis(4-(2-hydroxypropoxy)phenyl)propane, 1,3-bis(2-hydroxyethoxy)benzene, 4,4'-bis(2-hydroxyethoxy)biphenyl, and bis(4-(2-hydroxyethoxy)phenyl)sulfone; 9,9-bis(4-(2-hydroxyethoxy)phenyl)fluorene, 9,9-bis(4-hydroxyphenyl)fluorene, 9,9-bis(4-hydroxy-3-methylphenyl)fluorene, 9,9-bis(4-(2-hydroxypropoxy)phenyl)fluorene, 9,9-bis(4-(2-hydroxyethoxy)-3-methylphenyl)fluorene, 9,9-bis(4-(2-hydroxypropoxy)-3-methylphenyl)fluorene, 9,9-bis(4-(2-hydroxyethoxy)-3-isopropylphenyl)fluorene, 9,9-bis(4-(2-hydroxyethoxy)-3-isobutylphenyl)fluorene dihydroxy compounds having a fluorene ring, such as 9,9-bis(4-(2-hydroxyethoxy)-3-tert-butylphenyl)fluorene, 9,9-bis(4-(2-hydroxyethoxy)-3-cyclohexylphenyl)fluorene, 9,9-bis(4-(2-hydroxyethoxy)-3-phenylphenyl)fluorene, 9,9-bis(4-(2-hydroxyethoxy)-3,5-dimethylphenyl)fluorene, 9,9-bis(4-(2-hydroxyethoxy)-3-tert-butyl-6-methylphenyl)fluorene, and 9,9-bis(4-(3-hydroxy-2,2-dimethylpropoxy)phenyl)fluorene.

[0029] Among these, 2,2-bis(4-hydroxyphenyl)propane (ie, bisphenol A) and 2,2-bis(3-methyl-4-hydroxyphenyl)propane (ie, bisphenol C) are preferred from the viewpoint of impact resistance and heat resistance. The aromatic dihydroxy compounds may be used alone or in any combination of two or more.

[0030] Examples of the aliphatic dihydroxy compounds, alicyclic dihydroxy compounds, and ether-containing dihydroxy compounds that serve as raw materials for aliphatic polycarbonate resins include the following compounds. In the present invention, the aliphatic dihydroxy compound refers to a dihydroxy compound having a saturated hydrocarbon group, and does not include cyclic ethers in which a portion of the cyclic hydrocarbon is substituted with a hetero atom.

[0031] Straight-chain aliphatic dihydroxy compounds such as ethylene glycol, 1,3-propanediol, 1,2-propanediol, 1,4-butanediol, 1,5-heptanediol, 1,6-hexanediol, 1,9-nonanediol, 1,10-decanediol, and 1,12-dodecanediol; branched-chain aliphatic dihydroxy compounds such as 1,3-butanediol, 1,2-butanediol, neopentyl glycol, and hexylene glycol; Dihydroxy compounds which are primary alcohols of alicyclic hydrocarbons, exemplified by 1,2-cyclohexanedimethanol, 1,3-cyclohexanedimethanol, 1,4-cyclohexanedimethanol, tricyclodecane dimethanol, pentacyclopentadecanedimethanol, 2,6-decalindimethanol, 1,5-decalindimethanol, 2,3-decalindimethanol, 2,3-norbornane dimethanol, 2,5-norbornane dimethanol, 1,3-adamantanedimethanol, and dihydroxy compounds derived from terpene compounds such as limonene; dihydroxy compounds which are secondary or tertiary alcohols of alicyclic hydrocarbons, exemplified by 1,2-cyclohexanediol, 1,4-cyclohexanediol, 1,3-adamantanediol, hydrogenated bisphenol A, and 2,2,4,4-tetramethyl-1,3-cyclobutanediol; Ether-containing dihydroxy compounds, which are dihydroxy compounds containing an acetal ring, such as oxyalkylene glycols such as diethylene glycol, triethylene glycol, tetraethylene glycol, polyethylene glycol, polypropylene glycol, and polytetramethylene glycol, and spiro glycol (also known as 3,9-bis(1,1-dimethyl-2-hydroxyethyl-2,4,8,10-tetraoxaspiro[5,5]undecane) and dioxane glycol (also known as 2-(1,1-dimethyl-2-hydroxyethyl)-5-ethyl-5-hydroxymethyl-1,3-dioxane).

[0032] Among these, from the viewpoint of improving mechanical properties and fluidity during melt molding, it is preferable to contain structural units derived from an aliphatic dihydroxy compound or an alicyclic dihydroxy compound, of which 1,4-cyclohexanedimethanol and tricyclodecanedimethanol are more preferable, and it is even more preferable to contain structural units derived from 1,4-cyclohexanedimethanol. The aliphatic dihydroxy compounds, alicyclic dihydroxy compounds, and ether-containing dihydroxy compounds may be used alone or in any combination of two or more.

[0033] Examples of cyclic ethers that can be used as raw materials for aliphatic polycarbonate resins include the following compounds.

[0034] Cyclic ethers such as 1,2-epoxyethane (i.e., ethylene oxide), 1,2-epoxypropane (i.e., propylene oxide), 1,2-epoxycyclopentane, 1,2-epoxycyclohexane, 1,4-epoxycyclohexane, 1-methyl-1,2-epoxycyclohexane, 2,3-epoxynorbornane, and 1,3-epoxypropane; and compounds represented by the following formula (1), i.e., compounds selected from a group of stereoisomeric compounds such as isosorbide, isomannide, and isoidet:

[0035] [ka]

[0036] Among these, isosorbide, which is obtained by dehydration condensation of sorbitol produced from various starches that are abundant and readily available as a plant-derived resource, is preferred in terms of availability, ease of production, and the properties of the resulting molded article (e.g., heat resistance, impact resistance, surface hardness, carbon neutrality). The cyclic ethers may be used alone or in any combination of two or more.

[0037] Among these dihydroxy compounds that serve as raw materials for polycarbonate resins, it is preferable to use the compound represented by formula (1) because it utilizes biomass resources and has a low environmental impact. In other words, it is preferable that the polycarbonate resin has a structural unit derived from the compound represented by formula (1).

[0038] Of 100 mol% of the structural units derived from dihydroxy compounds in the polycarbonate resin, the proportion of structural units derived from the compound represented by formula (1) is preferably 35 mol% or more, more preferably 40 mol% or more. Furthermore, of 100 mol% of the structural units derived from dihydroxy compounds in the polycarbonate resin, the proportion of structural units derived from the compound represented by formula (1) is preferably 80 mol% or less, more preferably 70 mol% or less. Of 100 mol% of the structural units derived from dihydroxy compounds in the polycarbonate resin, the proportion of structural units derived from the compound represented by formula (1) is preferably 35 mol% or more and 80 mol% or less. When the proportion of the structural units derived from the compound represented by formula (1) in 100 mol % of the structural units derived from a dihydroxy compound in the polycarbonate resin is within the above range, the glass transition temperature of the polycarbonate resin becomes appropriately high, and when blended with the acrylic resin (B) and copolymer (C) described below, a resin composition having an excellent balance between heat resistance and fluidity can be obtained.

[0039] Examples of carbonate precursors that serve as raw materials for polycarbonate resins include carbonyl halides and carbonic acid diesters.

[0040] Examples of carbonyl halides include phosgene; and haloformates such as bischloroformates of dihydroxy compounds and monochloroformates of dihydroxy compounds.

[0041] As the carbonic acid diester, a compound represented by the following general formula (3) can usually be used: These carbonic acid diesters may be used alone or in any combination of two or more.

[0042] [ka]

[0043] (In general formula (3), A 1 and A 2 are each an aliphatic hydrocarbon group having 1 to 18 carbon atoms which may have a substituent, or an aromatic hydrocarbon group which may have a substituent, and A 1 and A 2 may be the same or different.)

[0044] A 1 and A 2 is preferably a substituted or unsubstituted aromatic hydrocarbon group, more preferably an unsubstituted aromatic hydrocarbon group. Examples of the substituent on the aliphatic hydrocarbon group include an ester group, an ether group, an amide group, and a halogen atom, and examples of the substituent on the aromatic hydrocarbon group include alkyl groups such as a methyl group and an ethyl group.

[0045] Examples of the carbonic acid diester represented by the general formula (3) include diphenyl carbonate (hereinafter sometimes abbreviated as DPC), substituted diphenyl carbonates such as ditolyl carbonate, and dialkyl carbonates such as dimethyl carbonate, diethyl carbonate, and di-tert-butyl carbonate, with diphenyl carbonate and substituted diphenyl carbonate being preferred, and diphenyl carbonate being particularly preferred.

[0046] The carbonate diester may contain impurities such as chloride ions, and these impurities may inhibit the polymerization reaction or deteriorate the hue of the resulting resin. Therefore, it is preferable to use a diester that has been purified by distillation or the like, as necessary.

[0047] In the present invention, the method for producing the polycarbonate resin is not particularly limited, and any method may be adopted using the above-mentioned raw materials as appropriate, such as interfacial polymerization, melt transesterification, pyridine method, ring-opening polymerization of a cyclic carbonate compound, or solid-phase transesterification of a prepolymer.

[0048] [Characteristics of polycarbonate resin] (molecular weight) The molecular weight of polycarbonate resin affects the reduced viscosity and 1 It can be expressed as the number average molecular weight measured by H-NMR, etc. The higher the value obtained by these measurement methods, the higher the molecular weight. 1 The number average molecular weight of the polycarbonate resin measured by H-NMR is preferably 8,000 or more, more preferably 9,000 or more, and even more preferably 10,000 or more. 1 The number average molecular weight of the polycarbonate resin measured by H-NMR is preferably 30,000 or less, more preferably 25,000 or less, and even more preferably 20,000 or less. 1 The number average molecular weight of the polycarbonate resin measured by H-NMR is preferably 8,000 or more and 30,000 or less. The reduced viscosity of the polycarbonate resin is preferably 0.3 dL / g or more, more preferably 0.35 dL / g or more, and even more preferably 0.4 dL / g or more. The reduced viscosity of the polycarbonate resin is preferably 1.0 dL / g or less, more preferably 0.8 dL / g or less, and even more preferably 0.7 dL / g or less. The reduced viscosity of the polycarbonate resin is preferably 0.3 dL / g or more and 1.0 dL / g or less. When the measured molecular weight of the polycarbonate resin is within the above range, sufficient mechanical strength is obtained, and the flowability during melt molding can also be adjusted to a preferred range.

[0049] (glass transition temperature) The glass transition temperature of the polycarbonate resin is preferably 80° C. or higher, more preferably 85° C. or higher, and even more preferably 90° C. or higher. The glass transition temperature of the polycarbonate resin is preferably 160° C. or lower, more preferably 150° C. or lower, and even more preferably 140° C. or lower. The glass transition temperature of the polycarbonate resin is preferably 80° C. or higher and 160° C. or lower. When the glass transition temperature of the polycarbonate resin is within the above range, the resin has sufficient heat resistance and mechanical properties, and is easy to mold.

[0050] [Acrylic resin (B)] The acrylic resin used in the present invention is a thermoplastic acrylic resin.

[0051] The acrylic resin preferably contains 80% by mass or more of methyl methacrylate monomer units, more preferably 85% by mass or more, and even more preferably 90% by mass or more, of all monomer units constituting the acrylic resin as 100% by mass. Furthermore, it is preferable to use an acrylic resin containing 100% by mass or less of methyl methacrylate monomer units. The acrylic resin preferably contains 80% by mass or more and 100% by mass or less of methyl methacrylate monomer units, of all monomer units constituting the acrylic resin as 100% by mass. When the content of the methyl methacrylate monomer units in the acrylic resin is within the above range, the glass transition temperature of the acrylic resin (B) becomes appropriately high, and when blended with the polycarbonate resin (A) and the copolymer (C), a resin composition having an excellent balance between heat resistance and fluidity can be obtained.

[0052] The acrylic resin may be a homopolymer of methyl methacrylate, but may also be copolymerized with other vinyl monomers depending on the purpose. The vinyl monomer used in the acrylic resin is not particularly limited, but examples thereof include: (Meth)acrylates such as methyl acrylate, ethyl (meth)acrylate, n-propyl (meth)acrylate, i-propyl (meth)acrylate, n-butyl (meth)acrylate, i-butyl (meth)acrylate, t-butyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, n-lauryl (meth)acrylate, n-stearyl (meth)acrylate, cyclohexyl (meth)acrylate, phenyl (meth)acrylate, benzyl (meth)acrylate, isobornyl (meth)acrylate, 2-methoxyethyl (meth)acrylate, and methoxypolyethylene glycol (meth)acrylate; vinyl monomers such as styrene, α-methylstyrene, vinyltoluene, (meth)acrylonitrile, vinyl chloride, vinyl acetate, and vinyl propionate; polyfunctional vinyl monomers such as divinylbenzene, ethylene glycol di(meth)acrylate, 1,3-butylene glycol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, triethylene glycol di(meth)acrylate, tetraethylene glycol di(meth)acrylate, tripropylene glycol di(meth)acrylate, trimethylolpropane tri(meth)acrylate, and allyl (meth)acrylate; These may be used alone or in any combination of two or more.

[0053] Among these, from the viewpoint of improving the thermal decomposition resistance of the acrylic resin, acrylates such as methyl acrylate, ethyl acrylate, and n-butyl acrylate are preferred, and methyl acrylate is more preferred in that the balance of compatibility with the polycarbonate resin (A) and the copolymer (C) described below is less likely to be impaired.

[0054] The amount of monomers other than methyl methacrylate relative to 100% by mass of all monomer units constituting the acrylic resin is preferably 20% by mass or less, more preferably 15% by mass or less, and even more preferably 10% by mass or less.

[0055] The molecular weight of the acrylic resin used in the present invention can be measured by GPC, which will be described later. The mass average molecular weight (Mw) of the acrylic resin used in the present invention is preferably 80,000 or more, more preferably 90,000 or more, and even more preferably 100,000 or more. The mass average molecular weight (Mw) of the acrylic resin used in the present invention is preferably 200,000 or less, more preferably 180,000 or less, and even more preferably 160,000 or less. The mass average molecular weight (Mw) of the acrylic resin used in the present invention is preferably 80,000 or more and 200,000 or less. When the mass average molecular weight of the acrylic resin is within the above range, sufficient mechanical strength can be obtained.

[0056] The glass transition temperature of the acrylic resin used in the present invention is preferably 70° C. or higher, more preferably 80° C. or higher, and even more preferably 90° C. or higher. The glass transition temperature of the acrylic resin used in the present invention is preferably 130° C. or lower, more preferably 125° C. or lower, and even more preferably 120° C. or lower. The glass transition temperature of the acrylic resin used in the present invention is preferably 70° C. or higher and 130° C. or lower. If the glass transition temperature of the acrylic resin used in the present invention is within the above range, the mechanical strength of the resin composition of the present invention is unlikely to be impaired.

[0057] The method for producing the acrylic resin used in the present invention is not particularly limited, and various methods such as solution polymerization, suspension polymerization, emulsion polymerization, bulk polymerization, etc. Aqueous polymerization such as suspension polymerization or emulsion polymerization is preferred because it is easy to control the heat generated by polymerization and has excellent productivity, and suspension polymerization is more preferred because the polymer recovery operation is simpler.

[0058] [Copolymer (C)] The copolymer (C) used in the present invention has a polymer chain (c1) that is compatible with the acrylic resin (B) and a polymer chain (c2) that contains 0.001% by mass or more and 50% by mass or less of vinyl monomer units having an epoxy group in the side chain.

[0059] The polymer chain (c2) has excellent reactivity with the polycarbonate resin (A). As a result, the copolymer (C) having a structure containing the polymer chains (c1) and (c2) acts as a reactive compatibilizer for the polycarbonate resin (A) and the acrylic resin (B), improving the interfacial interaction between them and enabling the realization of a resin composition having good moldability and good mechanical properties of the molded product. Furthermore, since the amount of epoxy groups remaining after the resin composition is composited is extremely small, gelation or unintended viscosity increases are unlikely to occur when the resin composition is remelted and molded, making it possible to realize a resin composition with excellent quality stability.

[0060] Copolymer (C) is preferably a block copolymer and / or a graft copolymer (sometimes abbreviated as block-graft copolymer) containing polymer chain (c1) and polymer chain (c2). In a block copolymer, polymer chain (c1) and polymer chain (c2) are bonded together in a single polymer chain, while a graft copolymer is a branched product in which either polymer chain (c1) or polymer chain (c2) is a trunk polymer and the other forms a branch polymer. From the viewpoint of the molecular structure of the compatibilizer generated upon reaction of the polycarbonate resin (A) with the copolymer (C), the copolymer (C) is more preferably a graft copolymer, and particularly preferably a graft copolymer in which the polymer chain (c1) is a branch polymer and the polymer chain (c2) is a trunk polymer.

[0061] Here, it is preferable that the copolymer (C) does not have a crosslinked structure, since the copolymer (C) does not have a crosslinked structure, making it easier to obtain a resin composition having excellent appearance of a molded article.

[0062] The ratio of polymer chains (c1) and polymer chains (c2) contained in copolymer (C) is not particularly limited as long as both are contained, but the mass ratio of polymer chains (c1) / polymer chains (c2) is preferably in the range of 10 / 90 to 70 / 30, more preferably in the range of 20 / 80 to 60 / 40, and even more preferably in the range of 30 / 70 to 50 / 50. When the mass ratio of polymer chain (c1) / polymer chain (c2) is within the above range, the fluidity of the resin composition during melt molding can be adjusted to a preferred range, and a resin composition with excellent moldability can be easily obtained.

[0063] The molecular weight of the copolymer (C) can be measured by GPC, which will be described later. The mass average molecular weight (Mw) of the copolymer (C) is preferably 30,000 or more, more preferably 40,000 or more, and even more preferably 50,000 or more. The mass average molecular weight (Mw) of the copolymer (C) is preferably 800,000 or less, more preferably 600,000 or less, and even more preferably 400,000 or less. The mass average molecular weight (Mw) of the copolymer (C) is preferably 30,000 or more and 800,000 or less. When the mass average molecular weight of the copolymer (C) is within the above range, the flowability during melt molding can be adjusted to a preferred range without impairing the mechanical properties of the resin composition.

[0064] The number average molecular weight (Mn) of the copolymer (C) is preferably 5,000 or more, more preferably 7,000 or more, and even more preferably 10,000 or more. The number average molecular weight (Mn) of the copolymer (C) is preferably 100,000 or less, more preferably 80,000 or less, and even more preferably 60,000 or less. The number average molecular weight (Mn) of the copolymer (C) is preferably 5,000 or more and 100,000 or less. When the number average molecular weight of the copolymer (C) is within the above range, the flowability during melt molding can be adjusted to a preferred range without impairing the mechanical properties of the resin composition.

[0065] The molecular weight distribution (Mw / Mn) of the copolymer (C) is preferably 1.5 or more, more preferably 2.0 or more, and even more preferably 2.5 or more. Also, it is preferably 10.0 or less, more preferably 9.0 or less, and even more preferably 8.0 or less. The molecular weight distribution (Mw / Mn) of the copolymer (C) is preferably 1.5 or more and 10.0 or less. When the molecular weight distribution of the copolymer (C) is within the above range, the flowability during melt molding can be adjusted to a preferred range without impairing the mechanical properties of the resin composition.

[0066] The glass transition temperature of the copolymer (C) is preferably 70° C. or higher, more preferably 80° C. or higher, and even more preferably 90° C. or higher. The glass transition temperature of the copolymer (C) is preferably 130° C. or lower, more preferably 125° C. or lower, and even more preferably 120° C. or lower. The glass transition temperature of the copolymer (C) is preferably 70° C. or higher and 130° C. or lower. When the glass transition temperature of the copolymer (C) is within the above range, the copolymer (C) has excellent handleability at room temperature, and the fluidity of the resin composition during melt molding can be adjusted within a preferred range. The copolymer (C) may have two or more glass transition temperatures, as long as the highest value is within the above range.

[0067] [Polymer chain (c1)] The polymer chain (c1) plays a role in ensuring compatibility with the acrylic resin (B), and therefore preferably contains 80% by mass or more and 100% by mass or less of methyl methacrylate monomer units. From the viewpoint of compatibility with the acrylic resin (B), the polymer chain (c1) more preferably contains 85% by mass or more and 100% by mass or less of methyl methacrylate monomer units, and even more preferably contains 90% by mass or more and 100% by mass or less.

[0068] The polymer chain (c1) may contain a monomer unit other than methyl methacrylate, as long as the compatibility with the acrylic resin (B) is not impaired. The monomer that provides such a monomer unit can be appropriately selected from those exemplified as other vinyl monomers for the acrylic resin (B).

[0069] From the viewpoint of the mechanical properties of the resin composition, the polymer chain (c1) preferably has a mass average molecular weight (Mw) of 3,000 or more, more preferably 5,000 or more, and even more preferably 8,000 or more. From the viewpoint of maintaining compatibility with the acrylic resin (B), the mass average molecular weight (Mw) of the polymer chain (c1) is preferably 50,000 or less, more preferably 40,000 or less, and even more preferably 30,000 or less. The mass average molecular weight (Mw) of the polymer chain (c1) is preferably 3,000 or more and 50,000 or less.

[0070] From the viewpoint of compatibility with the acrylic resin (B), the number average molecular weight (Mn) of the polymer chain (c1) is preferably 1,500 or more, more preferably 2,500 or more, and even more preferably 4,000 or more. Also, it is preferably 25,000 or less, more preferably 20,000 or less, and even more preferably 15,000 or less. The number average molecular weight (Mn) of the polymer chain (c1) is preferably 1,500 or more and 25,000 or less.

[0071] From the viewpoint of the stability of the interfacial strength between the acrylic resin (B) and the polycarbonate resin (A), the molecular weight distribution (Mw / Mn) of the polymer chain (c1) is preferably 1.2 or more, more preferably 1.5 or more, and even more preferably 1.8 or more. It is also preferably 3.0 or less, more preferably 2.8 or less, and even more preferably 2.5 or less. The molecular weight distribution (Mw / Mn) of the polymer chain (c1) is preferably 1.2 or more and 3.0 or less.

[0072] The polymer chain (c1) has a higher glass transition temperature than the polymer chain (c2) described below. That is, since the polymer chain (c1) also serves as a hard component of the copolymer (C), from the viewpoint of the handleability of the copolymer (C), the glass transition temperature of the polymer chain (c1) is preferably 70°C or higher, more preferably 80°C or higher, and even more preferably 90°C or higher. Furthermore, the glass transition temperature of the polymer chain (c1) is preferably 130°C or lower, more preferably 125°C or lower, and even more preferably 120°C or lower. The glass transition temperature of the polymer chain (c1) is preferably 70°C or higher and 130°C or lower. When the glass transition temperature of the polymer chain (c1) is within the above range, the copolymer (C) has excellent handleability at room temperature, and the fluidity of the resin composition during melt molding can be adjusted within a preferred range.

[0073] [Polymer chain (c2)] The polymer chain (c2) plays a role in ensuring reactivity with the polycarbonate resin (A). Therefore, the polymer chain (c2) contains 0.001% by mass or more and 50% by mass or less of vinyl monomer units having an epoxy group in the side chain.

[0074] Examples of vinyl monomer units having an epoxy group in the side chain include glycidyl (meth)acrylate, glycidyl α-ethyl acrylate, glycidyl α-n-propyl acrylate, glycidyl α-n-butyl acrylate, 3,4-epoxybutyl (meth)acrylate, 6,7-epoxyheptyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate glycidyl ether, 3,4-epoxycyclohexyl (meth)acrylate, allyl glycidyl ether, [(4-ethenylphenyl)methyl]oxirane, 4-(glycidyloxy)styrene, 4-vinylepoxycyclohexane, o-vinylbenzyl glycidyl ether, m-vinylbenzyl glycidyl ether, and p-vinylbenzyl glycidyl ether. These may be used alone or in any combination of two or more. Glycidyl methacrylate and 4-hydroxybutyl (meth)acrylate glycidyl ether are more preferred in that they can easily ensure reactivity with the polycarbonate resin (A).

[0075] From the viewpoint of reactivity with the polycarbonate resin (A), the proportion of the vinyl monomer units having an epoxy group in the side chain in the polymer chain (c2) is preferably 0.001% by mass or more and 50% by mass or less, more preferably 0.001% by mass or more and less than 50% by mass, even more preferably 0.01% by mass or more and 30% by mass or less, and particularly preferably 0.1% by mass or more and 10% by mass or less. When the proportion of vinyl monomer units having an epoxy group in a side chain in the polymer chain (c2) is within the above range, the polymer exhibits good reactivity with the polycarbonate resin (A), and unreacted epoxy groups are unlikely to remain in the resin composition, resulting in excellent quality stability as a molding material.

[0076] The polymer chain (c2) may contain a structure other than the vinyl monomer unit having an epoxy group in the side chain, as long as the reactivity with the polycarbonate resin (A) is not impaired, and a monomer that provides such a structure can be appropriately selected from those exemplified as other vinyl monomers for the acrylic resin (B). When the polymer chain (c2) of the copolymer (C) used in the present invention is completely thermodynamically incompatible with the acrylic resin (B), the reactivity of the polymer chain (c2) with the polycarbonate resin (A) is particularly good, epoxy groups are less likely to remain in the resin composition, and the copolymer (C) has excellent quality stability as a molding material. Therefore, among the other vinyl monomers exemplified for the acrylic resin (B), preferred examples of the monomer other than the vinyl monomer unit having an epoxy group in its side chain include n-butyl(meth)acrylate, i-butyl(meth)acrylate, t-butyl(meth)acrylate, 2-ethylhexyl(meth)acrylate, cyclohexyl(meth)acrylate, phenyl(meth)acrylate, benzyl(meth)acrylate, 2-methoxyethyl(meth)acrylate, and methoxypolyethylene glycol(meth)acrylate. More preferred are n-butyl acrylate, i-butyl acrylate, t-butyl acrylate, 2-ethylhexyl acrylate, 2-methoxyethyl acrylate, and methoxypolyethylene glycol acrylate, since the glass transition temperature of the polymer chain (c2) can be easily adjusted to fall within the preferred range described below.

[0077] The polymer chain (c2) has a lower glass transition temperature than the polymer chain (c1), and also plays a role in imparting appropriate flexibility to the resin composition. In order to impart appropriate flexibility to the resin composition, the glass transition temperature of the polymer chain (c2) is preferably 80°C or lower, more preferably 60°C or lower, and even more preferably 40°C or lower. From the viewpoint of the handleability of the copolymer (C) at room temperature, the glass transition temperature of the polymer chain (c2) is preferably −60° C. or higher, more preferably −40° C. or higher, and even more preferably −20° C. or higher. The glass transition temperature of the polymer chain (c2) is preferably from -60°C to 80°C. When the glass transition temperature of the polymer chain (c2) is within the above range, the copolymer (C) has excellent handleability at room temperature, and the polymer chain (c2) is endowed with appropriate flexibility, thereby ensuring high reactivity with the polycarbonate resin (A) during melt-kneading.

[0078] [Method for producing copolymer (C)] Methods for producing copolymer (C) include a method for obtaining a block copolymer by controlled polymerization, and a method for obtaining a block-graft copolymer by copolymerizing a macromonomer with a comonomer. Here, a macromonomer is a polymer with a polymerizable functional group at one end, also known as a macromer. A copolymer of a macromonomer and a comonomer is called a macromonomer copolymer (hereinafter sometimes referred to as "MMCP").

[0079] Controlled polymerization methods for synthesizing block copolymers include, for example, atom transfer radical polymerization (ATRP), reversible addition-fragmentation chain transfer (RAFT) polymerization, and organometallic-mediated radical polymerization (CMRP). Controlled polymerization methods for obtaining block copolymers have issues such as limitations on the types of monomers that can be used, coloration and odor due to catalyst residues, and reduced durability. On the other hand, a macromonomer copolymer allows two or more types of polymer chains to be bonded efficiently, and is therefore suitable as a method for producing the copolymer (C) used in the present invention.

[0080] [Macromonomer copolymer] When a macromonomer copolymer is used as the copolymer (C), two methods are possible: a method in which the polymer chain (c1) is a polymer chain derived from the macromonomer, and a method in which the polymer chain (c2) is a polymer chain derived from the macromonomer. In either case, the copolymer (C) can be used. However, since the polymer chain (c2) plays a role in imparting appropriate flexibility to the resin composition, its glass transition temperature is lower than that of the polymer chain (c1), and the polymer chain (c2) alone is often difficult to handle at room temperature. Therefore, a method in which the polymer chain (c1) is a polymer chain derived from a macromonomer is preferred. In particular, the copolymer (C) is preferably a macromonomer copolymer composed of a polymer chain (c1) derived from a macromonomer represented by the general formula (2) described below and a polymer chain (c2) derived from a comonomer copolymerizable with the macromonomer.

[0081] In the present specification, unless otherwise specified, a unit derived from a macromonomer corresponds to the polymer chain (c1), and a unit derived from a comonomer copolymerizable with the macromonomer corresponds to the polymer chain (c2). Furthermore, in this specification, a macromonomer preferred as a unit constituting the polymer chain (c1) is also simply referred to as a "macromonomer." Also, a comonomer preferred as a unit constituting the polymer chain (c2) is also simply referred to as a "comonomer."

[0082] (macromonomer) The macromonomer is a polymer having a polymerizable functional group at one end, and its structure is preferably represented by the following general formula (2).

[0083] [ka]

[0084] (In general formula (2), R 0 ~R n are each independently a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group, or a heterocyclic group. 1 ~X n are each independently a hydrogen atom or a methyl group. Z is a terminal group. n is a natural number from 2 to 10,000.

[0085] In the general formula (2), R 0 and R 1 ~R n are each independently a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group, or a heterocyclic group. The alkyl group, cycloalkyl group, aryl group, or heterocyclic group may have a substituent.

[0086] Examples of the alkyl group include branched or linear alkyl groups having a carbon number of 1 to 20. Specific examples include a methyl group, an ethyl group, an n-propyl group, and an i-propyl group. Examples of the cycloalkyl group include cycloalkyl groups having a carbon number of 3 to 20. Specific examples include a cyclopropyl group, a cyclobutyl group, and an adamantyl group. Examples of the aryl group include aryl groups having a carbon number of 6 to 18. Specific examples include a phenyl group and a naphthyl group. Examples of heterocyclic groups include heterocyclic groups having a carbon number of 5 to 18. Specific examples include a γ-lactone group and an ε-caprolactone group.

[0087] R 0 and R1 ~R n The substituents of each of the groups may be independently selected from the group consisting of an alkyl group, an aryl group, an alkoxycarbonyl group (-COOR'), a cyano group, a halogen atom, an allyl group, and an alkoxy group (-OR"). R' and R" may each independently be the same groups as R, except for heterocyclic groups. An example of the alkoxycarbonyl group as a substituent is a methoxycarbonyl group. Halogen as a substituent includes, for example, fluorine, chlorine, bromine and iodine. Examples of the alkoxy group as a substituent include an alkoxy group having a carbon number of 1 to 12. A specific example is a methoxy group.

[0088] R 0 and R 1 ~R n is preferably at least one selected from an alkyl group and a cycloalkyl group, more preferably an alkyl group. The alkyl group is preferably a methyl group, an ethyl group, an n-propyl group, or an i-propyl group, and from the viewpoint of availability, a methyl group is more preferred.

[0089] In general formula (2), X 1 ~X n are each independently a hydrogen atom or a methyl group, and a methyl group is preferred. Furthermore, from the viewpoint of ease of synthesis of the macromonomer, X 1 ~X n It is preferable that at least half of the groups are methyl groups.

[0090] In general formula (2), Z is a terminal group of the macromonomer. Examples of the terminal group of the macromonomer include a hydrogen atom and a group derived from a radical polymerization initiator, similar to the terminal groups of polymers obtained by known radical polymerization.

[0091] In the general formula (2), n is a natural number of 2 to 10,000. From the viewpoint of maintaining compatibility with the acrylic resin (B), n is preferably 10 to 1,000, and more preferably 20 to 500.

[0092] The preferred ranges of the monomers constituting the macromonomer and their ratios are the same as those described above for the "polymer chain (c1)."

[0093] The preferred ranges of the molecular weight and glass transition temperature of the macromonomer are the same as those described above for the "polymer chain (c1)."

[0094] (Method of producing macromonomer) The macromonomer can be produced by known methods, such as a method using a cobalt chain transfer agent (U.S. Pat. No. 4,680,352), a method using an α-substituted unsaturated compound such as α-bromomethylstyrene as a chain transfer agent (WO 88 / 04304), a method of chemically bonding a polymerizable group (JP-A-60-133007, U.S. Pat. No. 5,147,952), and a method using thermal decomposition (JP-A-11-240854). Among these, the method for producing the macromonomer using a cobalt chain transfer agent is preferred because it involves fewer production steps and uses a catalyst with a high chain transfer constant.

[0095] (Comonomer copolymerizable with macromonomer) The comonomer is not particularly limited as long as it is copolymerizable with the macromonomer, and various polymerizable monomers can be used as needed. For example, (Meth)acrylates such as methyl acrylate, ethyl (meth)acrylate, n-propyl (meth)acrylate, i-propyl (meth)acrylate, n-butyl (meth)acrylate, i-butyl (meth)acrylate, t-butyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, n-lauryl (meth)acrylate, n-stearyl (meth)acrylate, cyclohexyl (meth)acrylate, phenyl (meth)acrylate, benzyl (meth)acrylate, isobornyl (meth)acrylate, 2-methoxyethyl (meth)acrylate, 2-ethoxyethyl (meth)acrylate, phenoxyethyl (meth)acrylate, and methoxypolyethylene glycol (meth)acrylate; hydroxyl group-containing (meth)acrylates such as 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate, and glycerol (meth)acrylate; Carboxy group-containing vinyl monomers such as (meth)acrylic acid, 2-(meth)acryloyloxyethyl hexahydrophthalate, 2-(meth)acryloyloxypropyl hexahydrophthalate, 2-(meth)acryloyloxyethyl phthalate, 2-(meth)acryloyloxypropyl phthalate, 2-(meth)acryloyloxyethyl maleate, 2-(meth)acryloyloxypropyl maleate, 2-(meth)acryloyloxyethyl succinate, 2-(meth)acryloyloxypropyl succinate, crotonic acid, fumaric acid, maleic acid, itaconic acid, monomethyl maleate, and monomethyl itaconate; Vinyl monomers containing an acid anhydride group, such as maleic anhydride and itaconic anhydride; Epoxy group-containing vinyl monomers such as glycidyl (meth)acrylate, glycidyl α-ethyl acrylate, and 3,4-epoxybutyl (meth)acrylate; Amino group-containing (meth)acrylate vinyl monomers such as dimethylaminoethyl (meth)acrylate and diethylaminoethyl (meth)acrylate; vinyl monomers containing an amide group, such as (meth)acrylamide, Nt-butyl(meth)acrylamide, N-methylol(meth)acrylamide, N-methoxymethyl(meth)acrylamide, N-butoxymethyl(meth)acrylamide, diacetone acrylamide, maleic acid amide, and maleimide; vinyl monomers such as styrene, α-methylstyrene, vinyltoluene, (meth)acrylonitrile, vinyl chloride, vinyl acetate, and vinyl propionate; Examples include: These may be used alone or in any combination of two or more.

[0096] Among these, examples of monomers preferred as comonomers and preferred contents thereof are in accordance with the ranges described above for "polymer chain (c2)."

[0097] In particular, when a macromonomer copolymer is used as the copolymer (C), it is preferable to use a combination of methacrylate and acrylate among the monomers listed above. From the viewpoint of the reactivity between the macromonomer and the comonomer, acrylate is more reactive than methacrylate and is therefore preferable. On the other hand, if the amount of acrylate is too large, the glass transition temperature of the polymer composed of the comonomer decreases, which may impair the handleability of the macromonomer copolymer at room temperature. By using a combination of methacrylate and acrylate, it is possible to appropriately adjust the reactivity with the macromonomer and the handling properties at room temperature.

[0098] When methacrylate and acrylate are used in combination as comonomers, the mass ratio of methacrylate / acrylate is preferably in the range of 0 / 100 to 70 / 30, more preferably in the range of 20 / 80 to 60 / 40, and even more preferably in the range of 30 / 70 to 50 / 50. When the methacrylate / acrylate mass ratio is within the above range, the reactivity of the macromonomer and the comonomer is high, and the amount of unreacted macromonomer that may be generated during the production of the macromonomer copolymer can be minimized, thereby maximizing the effects of the copolymer (C).

[0099] The preferred range of the glass transition temperature of the polymer derived from the comonomer is the same as the range described above for the "polymer chain (c2)."

[0100] [Method of manufacturing macromonomer copolymer] The method for producing a macromonomer copolymer includes a step of polymerizing a macromonomer and a comonomer.

[0101] The method for polymerizing the macromonomer and the comonomer is not particularly limited, and various methods can be used, such as solution polymerization, suspension polymerization, emulsion polymerization, bulk polymerization, etc. Aqueous polymerization such as suspension polymerization or emulsion polymerization is preferred because it is easy to control the heat generated by polymerization and has excellent productivity, and suspension polymerization is more preferred because the polymer recovery operation is simpler.

[0102] [Resin composition] In the resin composition of the present invention, the blending amount of the copolymer (C) relative to the total of the polycarbonate resin (A) and the acrylic resin (B) (100% by mass) is preferably 0.1% by mass or more and 20% by mass or less. The blending amount of copolymer (C) is more preferably 1% by mass or more, and even more preferably 2% by mass or more, and more preferably 10% by mass or less, and even more preferably 5% by mass or less.

[0103] The proportion of the polycarbonate resin (A) in the resin composition of the present invention is preferably 50% by mass or more, more preferably 55% by mass or more, and even more preferably 60% by mass or more. The proportion of the polycarbonate resin (A) in the resin composition of the present invention is preferably 90% by mass or less, more preferably 80% by mass or less, and even more preferably 70% by mass or less. The proportion of the polycarbonate resin (A) in the resin composition of the present invention is preferably 50% by mass or more and 90% by mass or less.

[0104] The proportion of the acrylic resin (B) in the resin composition of the present invention is preferably 10% by mass or more, more preferably 20% by mass or more, and even more preferably 30% by mass or more. The proportion of the acrylic resin (B) in the resin composition of the present invention is preferably 50% by mass or less, more preferably 45% by mass or less, and even more preferably 40% by mass or less. The proportion of the acrylic resin (B) in the resin composition of the present invention is preferably 10% by mass or more and 50% by mass or less.

[0105] By setting the blending ratio of the resin composition of the present invention within the above range, it is possible to provide a resin composition that not only achieves a high level of balance between various required physical properties such as mechanical properties and heat resistance, but also has excellent moldability and quality stability.

[0106] The resin composition of the present invention may contain other resin components in addition to the polycarbonate resin (A), the acrylic resin (B), and the copolymer (C) as long as the effects of the present invention are not impaired. Examples of other resin components include synthetic resins such as polystyrene, polyolefin, amorphous polyolefin, acrylonitrile-butadiene-styrene copolymer (ABS resin), and acrylonitrile-styrene copolymer (AS resin); and elastomers such as acrylic rubber, butadiene rubber, and silicone rubber. Among these, acrylonitrile-butadiene-styrene copolymer (ABS resin) and acrylonitrile-styrene copolymer (AS resin) are preferred, with acrylonitrile-styrene copolymer (AS resin) being more preferred, because they are compatible with the polycarbonate resin (A) or the acrylic resin (B) and allow easy adjustment of the refractive index, fluidity, heat resistance, and the like of each component. These may be used alone or in combination of two or more.

[0107] The resin composition of the present invention may contain other components such as additives in addition to the polycarbonate resin (A), the acrylic resin (B), and the copolymer (C) as long as the effects of the present invention are not impaired. Examples of additives include antioxidants, heat stabilizers, light stabilizers, ultraviolet absorbers, fillers such as fillers, neutralizing agents, lubricants, antifogging agents, antiblocking agents, slip agents, dispersants, colorants, flame retardants, antistatic agents, conductivity imparting agents, crosslinking agents, crosslinking aids, metal deactivators, molecular weight modifiers, antibacterial agents, antifungal materials, fluorescent brighteners, organic diffusing agents, and inorganic diffusing agents.

[0108] [Method of producing resin composition] The resin composition of the present invention can be produced, for example, by mechanically melt-kneading the above-mentioned components that constitute the resin composition. The melt kneader may be a single-screw extruder, a twin-screw extruder, a Brabender, a Banbury mixer, a kneader blender, a roll mill, etc. In melt kneading, the components may be kneaded all at once, or a multi-stage divided kneading method may be used in which an arbitrary component is kneaded and then the remaining components are added and kneaded. Among these, a method in which each component is continuously added using a twin-screw extruder equipped with a vacuum vent to continuously obtain a resin composition is preferred from the viewpoint of productivity and uniformity of quality. The kneading temperature is preferably 160° C. or higher, more preferably 180° C. or higher, and even more preferably 200° C. or higher. The kneading temperature is preferably 300° C. or lower, more preferably 280° C. or lower, and even more preferably 260° C. or lower. The kneading temperature is preferably 160° C. or higher and 300° C. or lower. If the kneading temperature is within this range, the resin composition can be mixed while suppressing thermal deterioration due to retention in the kneader and heat generation due to shear.

[0109] [Characteristics of resin composition] (Liquidity) The resin composition of the present invention preferably has a melt mass flow rate (MFR) of 4.2 or less, more preferably 4.0 or less, and even more preferably 3.8 or less, after a 4-minute holding time, as measured by the method described below. Furthermore, the melt mass flow rate (MFR) of 2.0 or more, more preferably 2.3 or more, and even more preferably 2.6 or more, after a 4-minute holding time, as measured by the method described below, is preferably 2.0 or more, more preferably 2.3 or more, and even more preferably 2.6 or more. When the MFR is within the above range, the resin composition of the present invention exhibits good fluidity and can be used as a molding material with excellent moldability. Furthermore, the resin composition of the present invention preferably has a melt mass flow rate (MFR) of 4.0 or less, more preferably 3.8 or less, and even more preferably 3.5 or less, after a 2-minute holding time, as measured by the method described below. Furthermore, the melt mass flow rate (MFR) of 1.8 or more, more preferably 2.1 or more, and even more preferably 2.4 or more, after a 2-minute holding time, as measured by the method described below. When the MFR is within the above range, the resin composition of the present invention exhibits good fluidity and can be used as a molding material with excellent moldability. Furthermore, the resin composition of the present invention preferably has a melt mass flow rate (MFR) of 4.5 or less, more preferably 4.2 or less, and even more preferably 4.0 or less after a holding time of 8 minutes, as measured by the method described below. Furthermore, the melt mass flow rate (MFR) of 2.2 or more, more preferably 2.5 or more, and even more preferably 2.7 or more after a holding time of 8 minutes, as measured by the method described below, is preferably 2.2 or more, more preferably 2.5 or more, and even more preferably 2.7 or more. When the MFR is within the above range, the resin composition of the present invention exhibits good thermal stability and is excellent as a molding material. Generally, the longer the holding time when measuring the melt mass flow rate (MFR), the more the thermal decomposition of the resin composition progresses, and therefore the larger the measured value. If unreacted epoxy groups are present in the resin composition, gelation and other reactions will proceed in parallel with thermal decomposition, leading to an unintended increase in viscosity, which is undesirable from the standpoint of quality stability. On the other hand, rapid thermal decomposition leading to a sudden increase in the melt mass-flow rate (MFR) value is also undesirable for the molding material from the standpoint of thermal decomposition resistance. In other words, there is a preferred range for the dependence of the melt mass-flow rate on the retention time.

[0110] (Dependence of fluidity on holding time) The resin composition of the present invention preferably has a melt mass-flow rate (MFR) at an 8-minute holding time, measured by the method described below, divided by the melt mass-flow rate (MFR) at a 2-minute holding time of 0.95 or more, more preferably 1.00 or more, and even more preferably 1.05 or more. Furthermore, the melt mass-flow rate (MFR) at an 8-minute holding time, measured by the method described below, divided by the melt mass-flow rate (MFR) at a 2-minute holding time of 1.50 or less, more preferably 1.40 or less, and even more preferably 1.30 or less. Within these ranges, the resin composition of the present invention contains few unreacted epoxy groups, making gelation and unintended viscosity increases less likely to occur, and has excellent resistance to thermal decomposition during melting, making it applicable as a molding material with excellent quality stability.

[0111] (transparency) The resin composition of the present invention preferably has a total light transmittance of 80% or more, more preferably 85% or more, and even more preferably 90% or more, as measured by the method described below. Furthermore, the haze value, as measured by the method described below, is preferably 55% or less, more preferably 30% or less, and even more preferably 10% or less. Within this range, a molded article made from the resin composition of the present invention has transparency and can be used in applications requiring visible light transmittance, such as lighting covers and glass replacements.

[0112] (shock resistance) The resin composition of the present invention has a Charpy impact value of 3.0 kJ / m as measured by the method described below. 2 It is preferable that the concentration is 4.0 kJ / m or more. 2 More preferably, 5.0 kJ / m or more 2 When the content is within the above range, the molded article made from the resin composition of the present invention has appropriate impact resistance and is less likely to break under the usage environment.

[0113] [Molded body] The resin composition of the present invention can be processed into various molded articles by molding methods such as injection molding (insert molding, two-color molding, sandwich molding, gas injection molding, etc.), extrusion molding, inflation molding, T-die film molding, laminate molding, blow molding, hollow molding, compression molding, and calendar molding. The molded article of the present invention is made from the resin composition of the present invention. The shape of the molded article is not particularly limited, and examples thereof include a sheet, film, plate, particle, lump, fiber, rod, porous body, and foam. [Example]

[0114] The present invention will be described below with reference to examples, but the present invention is not limited to these examples. In the following description, "parts" and "%" mean "parts by mass" and "% by mass". [Evaluation method] (1) Molecular weight and molecular weight distribution of copolymer The mass average molecular weight (Mw) and number average molecular weight (Mn) were measured using gel permeation chromatography (GPC) (manufactured by Tosoh Corporation, trade name: HLC-8420) under the following conditions. Column: TSK GUARD COLUMN SUPER HZ-L (DI 4.6 mm × 35 mm) and two TSK-GEL SUPER HZM-N (DI 6.0 mm × 150 mm) columns connected in series. Eluent:THF Measurement temperature: 40℃ Flow rate: 0.6mL / min The Mw and Mn were determined using a calibration curve prepared using four types of polymethyl methacrylate manufactured by Polymer Laboratories, each having a peak top molecular weight of 1590, 10290, 55600, and 141500.

[0115] (2) Glass transition temperature of copolymer The glass transition temperature was measured using a differential scanning calorimeter (DSC6220, manufactured by SII NanoTechnology Inc.). Approximately 10 mg of the copolymer was placed in a sealed aluminum pan manufactured by SII NanoTechnology Inc. The measurement was initiated at 30°C under a 40 mL / min nitrogen flow and heated to 180°C at a rate of 10°C / min. The sample was then held at 180°C for 5 minutes and cooled to -50°C at a rate of 10°C / min. The sample was then held at -50°C for 5 minutes and then heated again to 180°C at a rate of 10°C / min. From the DSC data during this second heating run, the extrapolated glass transition onset temperature was determined. This was the temperature at the intersection of a line extending the low-temperature baseline toward the high-temperature side and a tangent drawn at the point where the gradient of the step-like portion of the glass transition curve is maximum. This was used as the glass transition temperature.

[0116] (3) Melt mass flow rate (MFR) The resin composition was melt-kneaded as described below to obtain a pellet-shaped resin composition. The resulting pellets were used in accordance with JIS K7210-1 using a Melt Indexer L244 (manufactured by Techno Seven Co., Ltd.) to fill a cylinder maintained at 230°C with the sample. After holding the cylinder for 4 minutes, a load of 2.16 kg was applied, and the extruded sample was collected and weighed to measure the melt mass flow rate (MFR). The measurement was repeated three times, and the average value was calculated.

[0117] (4) Dependence of MFR on retention time The melt mass flow rate was measured for each retention time in the same manner as above, except that the retention time after filling the cylinder with the sample was changed to 2 minutes or 8 minutes. The MFR for a retention time of 8 minutes was divided by the MFR for a retention time of 2 minutes. If the MFR was 1.00 or less, it was determined that a large amount of unreacted epoxy groups remained in the pellet-shaped resin composition, and that in addition to thermal decomposition due to retention of the resin composition, reaction due to the unreacted epoxy groups was also progressing.

[0118] (5) Transparency The resin composition was injection molded as described below to obtain a 2 mm thick plate-shaped test piece. The total light transmittance (TT) and haze (Hz) of the obtained test piece were measured using a haze meter NDH4000 (manufactured by Nippon Denshoku Industries Co., Ltd.) under a D65 light source in accordance with JIS K7136.

[0119] (6) Impact resistance The resin composition was injection molded as described below to obtain test pieces for Charpy impact testing in accordance with JIS K7111. A V-notch (notch tip diameter r = 0.25) was formed in the center of the test piece using a notching machine A-4 (manufactured by Toyo Seiki Seisaku-sho, Ltd.), and five pieces were tested edgewise using a 1J hammer in a Charpy impact tester DG-CP (manufactured by Toyo Seiki Seisaku-sho, Ltd.). The average of the obtained impact values ​​was calculated and used as an index of impact resistance.

[0120] [Raw materials used] The abbreviations and manufacturers of the compounds used in the following Examples and Production Examples are as follows:

[0121] MMA: Methyl methacrylate (Mitsubishi Chemical Corporation) MA: Methyl acrylate (Mitsubishi Chemical Corporation) GMA: Glycidyl methacrylate (Tokyo Chemical Industry Co., Ltd.) MEMA: 2-Methoxyethyl methacrylate (Mitsubishi Chemical Corporation) MEA: 2-Methoxyethyl acrylate (Mitsubishi Chemical Corporation) BA: n-butyl methacrylate (Mitsubishi Chemical Corporation) AMBN: 2,2'-azobis(2-methylbutyronitrile) (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.), product name V59 Perocta O: 1,1,3,3-tetramethylbutylperoxy-2-ethylhexanoate (NOF Corporation) Sodium sulfate (Tokyo Chemical Industry Co., Ltd.) 1-OcSH: 1-octanethiol (Tokyo Chemical Industry Co., Ltd.) Cobalt(II) acetate tetrahydrate (Fujifilm Wako Pure Chemical Industries, Ltd.) Diphenylglyoxime (Tokyo Chemical Industry Co., Ltd., EP grade) Boron trifluoride diethyl ether complex (Tokyo Chemical Industry Co., Ltd., EP grade) Dispersant An aqueous dispersant solution with a solid content of 10% by mass was prepared by the method described in WO 2022 / 114157 and used as a dispersant for suspension polymerization.

[0122] <Production Example 1> Synthesis of chain transfer agent (1) In a synthesis apparatus equipped with a stirrer, 2.00 g (8.03 mmol) of cobalt (II) acetate tetrahydrate, 3.86 g (16.1 mmol) of diphenylglyoxime, and 100 mL of diethyl ether that had been deoxygenated in advance by bubbling with nitrogen were placed under a nitrogen atmosphere, and the mixture was stirred at room temperature for 2 hours. Next, 20 mL of boron trifluoride diethyl ether complex was added, and the mixture was stirred for another 6 hours. The obtained mixture was filtered, and the solid was washed with diethyl ether and dried at 100 mPa or less for 12 hours to obtain 5.02 g (7.93 mmol, yield 99% by mass) of chain transfer agent (1) as a brown solid.

[0123] <Manufacturing example 2> MM-1 In a separable flask equipped with a condenser, 145 parts of deionized water, 0.13 parts of sodium sulfate, and 0.26 parts of a dispersant were mixed to prepare an aqueous dispersion for suspension polymerization. Next, 95 parts of MMA and 5 parts of MA as monomers, 0.0040 parts (40 ppm by mass) of the chain transfer agent (1) synthesized in Production Example 1, and 0.4 parts of Perocta O as a radical polymerization initiator were mixed to obtain a monomer mixture. The resulting monomer mixture was added to the aqueous dispersion for suspension polymerization, and then the stirring speed was increased while the atmosphere in the separable flask was replaced with nitrogen by nitrogen bubbling to obtain a monomer dispersion. The monomer dispersion was heated to 80°C and maintained at this temperature for 4 hours, and then heated to 92°C and maintained at this temperature for 2 hours. The resulting polymer suspension was cooled to below 40°C, filtered through a filter cloth, and the residue was washed with deionized water and dried at 40°C for 16 hours to obtain macromonomer MM-1. The relative molecular weight of the obtained MM-1 in terms of PMMA (polymethyl methacrylate) was measured by GPC, and the mass average molecular weight (M w ) is 15,500, and the number average molecular weight (M n ) is 8,500, and the molecular weight distribution (M w / M n ) was 1.82. The results are shown in Table 1.

[0124] [Table 1]

[0125] <Production Example 3> MMCP-1 An aqueous dispersion for suspension polymerization was prepared by mixing 200 parts of deionized water, 0.1 parts of sodium sulfate, and 13.1 parts of a dispersant. A separable flask equipped with a condenser was charged with 40 parts of MM-1 synthesized in Production Example 2 as a macromonomer, 6 parts of GMA and 54 parts of MEA as comonomer raw materials, and 0.4 parts of 1-octanethiol as a chain transfer agent, and the mixture was mixed and heated to 50°C with stirring to obtain a raw material syrup. After cooling the raw syrup to below 40°C, 0.2 parts of AMBN as a radical polymerization initiator was dissolved in the syrup, and then the aqueous dispersion for suspension polymerization was added. The atmosphere in the separable flask was replaced with nitrogen by bubbling nitrogen, while the stirring speed was increased to obtain a syrup dispersion. The syrup dispersion was heated to 75°C and maintained at this temperature for 3 hours, and then heated to 85°C and maintained at this temperature for 30 minutes to complete the polymerization, thereby obtaining a polymer suspension. After the suspension was cooled to 40°C or below, the polymer suspension was filtered through a filter cloth, the filtered material was washed with deionized water, and dried at 40°C for 16 hours to obtain macromonomer copolymer MMCP-1. The relative molecular weight of the obtained MMCP-1 in terms of PMMA was measured by GPC, and the mass average molecular weight (M w ) is 214,000, and the number average molecular weight (M n ) is 28,200, and the molecular weight distribution (M w / M n ) was 7.59. When the glass transition temperature was measured by DSC, two temperatures were detected: -31°C and 100°C. The results are shown in Table 2.

[0126] <Production Example 4> Acryl-1 In a separable flask equipped with a condenser, 200 parts of deionized water, 0.1 part of sodium sulfate, and 2.62 parts of a dispersant were mixed to prepare an aqueous dispersion for suspension polymerization. Next, 90 parts of MMA, 6 parts of GMA, and 4 parts of MA as monomers, 0.7 parts of 1-octanethiol as a chain transfer agent, and 0.2 parts of AMBN as a radical polymerization initiator were mixed to obtain a monomer mixture. The resulting monomer mixture was added to the aqueous dispersion for suspension polymerization, and then the stirring speed was increased while the atmosphere in the separable flask was replaced with nitrogen by nitrogen bubbling to obtain a monomer dispersion. The monomer dispersion was heated to 75°C, and the temperature of the separable flask was maintained until the peak of the heat generated by polymerization appeared. After the peak of the heat generated by polymerization was observed, the monomer dispersion was heated to 85°C and maintained at this temperature for 30 minutes to complete the polymerization, thereby obtaining a polymer suspension. After the suspension was cooled to below 40°C, the polymer suspension was filtered through a filter cloth, the filtered material was washed with deionized water and dried at 60°C for 16 hours to obtain a random copolymer Acryl-1. The relative molecular weight of the obtained Acryl-1 in terms of PMMA was measured by GPC, and the mass average molecular weight (Mw ) is 50,500, and the number average molecular weight (M n ) is 25,300, and the molecular weight distribution (M w / M n ) was 2.00, and the glass transition temperature measured by DSC was 107°C. The results are shown in Table 2.

[0127] <Production Examples 5 to 9> MMCP-2 to MMCP-6 A macromonomer copolymer was obtained in the same manner as in Production Example 3, except that the macromonomer and comonomer were changed according to Table 2. Thereafter, the relative molecular weight and glass transition temperature were measured in the same manner as in Production Example 3. The evaluation results are shown in Table 2.

[0128] [Table 2]

[0129] [Polycarbonate resin] PC-1: Isosorbide-containing PC resin Durabio D7340R (manufactured by Mitsubishi Chemical Corporation)

[0130] [Acrylic resin] PMMA-1: PMMA resin Acryester VH001 (Mitsubishi Chemical Corporation)

[0131] [Copolymer] MMCP-1: MM-1·GMA·MEA copolymer synthesized in Production Example 3 Acryl-1: MMA-GMA-MA copolymer synthesized in Production Example 4 MMCP-2: MM-1·MEA copolymer synthesized in Production Example 5 MMCP-3: MM-1·GMA·MEA·MEMA copolymer synthesized in Production Example 6 MMCP-4: MM-1·GMA·MEA copolymer synthesized in Production Example 7 MMCP-5: MM-1·GMA·MEA·MEMA copolymer synthesized in Production Example 8 MMCP-6: MM-1·GMA·BA·MMA copolymer synthesized in Production Example 9

[0132] [Other resin components] AS-1: AS resin Sunrex SAN-C (manufactured by Techno UMG Co., Ltd.)

[0133] Example 1 [Production of resin composition] Polycarbonate resin PC-1 and acrylic resin PMMA-1 were used, and each resin was dried at 80°C for at least 12 hours. Then, they were dry-blended with the copolymer MMCP-1 obtained in Production Example 3 in a mass ratio of 60:40:5. The mixture was then melt-kneaded using a φ35mm twin-screw extruder (TEM-35B manufactured by Shibaura Machine Co., Ltd.) at a cylinder temperature of 240°C to obtain a pellet-shaped resin composition. The resulting pelletized resin composition was molded using an electric injection molding machine (SE100EV-A manufactured by Sumitomo Heavy Industries, Ltd.) to obtain a molded body having a thickness of 2 mm, a molded body for Charpy testing. The obtained pelletized resin composition was subjected to an MFR test, and the obtained test specimens were also subjected to a transparency evaluation at 23°C and an impact resistance test. The evaluation results are shown in Table 3.

[0134] <Examples 2 to 9, Comparative Examples 1 to 3> Pellet-shaped resin compositions and molded pieces for various evaluations were obtained in the same manner as in Example 1, except that the formulation of the resin composition was changed according to Table 3. Thereafter, each evaluation was carried out in the same manner as in Example 1. The evaluation results are shown in Table 3.

[0135] [Table 3]

[0136] Example 1 shows that when MMCP-1, which has a macromonomer chain (c1) and a polymer chain (c2) containing a moderate amount of vinyl monomer units with epoxy groups in the side chain, is used as a copolymer, the MFR after 4 minutes is moderate, and the MFR after 8 minutes divided by the MFR after 2 minutes exceeds 1.00, resulting in a resin composition with excellent moldability and low unreacted epoxy groups, resulting in excellent quality stability. Furthermore, these molded articles are transparent with high total light transmittance and relatively high Charpy impact values, demonstrating excellent mechanical properties.

[0137] From Comparative Example 1, it was found that when none of MMCP-1 to MMCP-6 was contained as a copolymer, a molded article with a low Charpy impact value and low impact resistance was obtained.

[0138] From Comparative Example 2, it was found that when Acryl-1 containing a vinyl monomer unit having an epoxy group in the side chain was used as the copolymer, rather than any of MMCP-1 to MMCP-6, a molded product with low impact resistance was obtained. Furthermore, the MFR after 8 minutes of holding divided by the MFR after 2 minutes of holding is 1.00, which suggests that some unreacted epoxy groups are included. The copolymer Acryl-1 has higher compatibility with the acrylic resin PMMA-1 than the polycarbonate resin PC-1, and therefore the frequency of reaction with the polycarbonate resin PC-1 is low, so it is presumed that unreacted epoxy groups remain.

[0139] From Comparative Example 3, it was found that when MMCP-2, which does not contain a vinyl monomer unit having an epoxy group in the side chain, was used as a copolymer, the MFR after 4 minutes retention was significantly high and moldability was poor.

[0140] Examples 2 and 3 show that even when MMCP-3 and MMCP-4 having polymer chains (c2) in which vinyl monomer units having epoxy groups in the side chains are modified are used as copolymers, resin compositions with excellent moldability and a 4-minute MFR lower than those of Comparative Examples 1 and 3 can be obtained. Furthermore, these molded articles are transparent with high total light transmittance, and have relatively high Charpy impact values ​​and good mechanical properties.

[0141] From Examples 4 and 5, it was found that even when MMCP-5 to MMCP-6, which have a different composition ratio of polymer chain (c2), are used, as long as an appropriate amount of vinyl monomer units having epoxy groups in the side chain is contained, resin compositions having excellent moldability and few unreacted epoxy groups, and excellent quality stability can be obtained. Furthermore, it was found that these molded articles have high total light transmittance, are transparent, and have relatively high Charpy impact values, and have good mechanical properties.

[0142] From Examples 6 and 7, it was found that if the blending amount of resin composition (C) satisfies the predetermined range, a resin composition having excellent moldability, a small amount of unreacted epoxy groups, and excellent quality stability can be obtained. Furthermore, it was found that these molded articles have high total light transmittance, transparency, and a relatively high Charpy impact value, and have good mechanical properties.

[0143] From Examples 8 to 9, it was found that when AS-1 was used in combination as another resin, the refractive indexes of the polymer components constituting the resin composition were balanced, resulting in a molded product with even better transparency. [Industrial Applicability]

[0144] According to the present invention, a polycarbonate resin and an acrylic resin are composited using a reactive compatibilizer, and a resin composition having excellent mechanical properties and moldability can be provided without impairing the stability of quality. The resin composition of the present invention, when molded, exhibits excellent weather resistance and optical properties in addition to transparency and mechanical properties, and is therefore suitable for use in automobile interior and exterior components, outdoor building materials (such as lighting covers, carports, and highway soundproofing walls), display front panels, and housings for electrical and electronic devices.

Claims

1. The composition comprises a polycarbonate resin (A), an acrylic resin (B), and a copolymer (C), A resin composition, wherein the copolymer (C) has the following polymer chain (c1) and polymer chain (c2): Polymer chain (c1): A polymer chain that is compatible with the acrylic resin (B). Polymer chain (c2): A polymer chain containing 0.001% by mass or more and 50% by mass or less of a vinyl monomer unit having an epoxy group in the side chain.

2. The resin composition according to claim 1, wherein the blending amount of the copolymer (C) is 0.1 mass% or more and 20 mass% or less relative to 100 mass% of the total of the polycarbonate resin (A) and the acrylic resin (B).

3. The resin composition according to claim 1 or 2, wherein the polymer chain (c1) contains 80% by mass or more and 100% by mass or less of methyl methacrylate monomer units.

4. The resin composition according to claim 1 or 2, wherein the polycarbonate resin (A) has a structural unit derived from a compound represented by the following formula (1): 【Chemical 1】

5. The resin composition according to claim 1 or 2, wherein the acrylic resin (B) contains 80% by mass or more and 100% by mass or less of methyl methacrylate monomer units.

6. The resin composition according to claim 1 or 2, wherein the copolymer (C) is a block copolymer and / or a graft copolymer.

7. 3. The resin composition according to claim 1, wherein the copolymer (C) is a macromonomer copolymer composed of a polymer chain (c1) derived from a macromonomer represented by the following general formula (2) and a polymer chain (c2) derived from a comonomer copolymerizable with the macromonomer: 【Chemistry 2】 (In general formula (2), R ０ ~R ｎ are each independently a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group, or a heterocyclic group. １ ~X ｎ are each independently a hydrogen atom or a methyl group. Z is a terminal group. n is a natural number from 2 to 10,000.

8. A molded article made of the resin composition according to claim 1 or 2.

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