Resin composition, flat plate-shaped molded body, multilayer body, molded article, and method for producing molded article

Abstract

The present invention provides a resin composition for producing a polycarbonate resin film or sheet that does not rebound even when subjected to heat bending molding together with an acrylic resin layer and has excellent transparency, as well as a flat plate-shaped molded body, a multilayer body, a molded product, and a method for producing a molded product using the above resin composition. The resin composition of the present invention contains: 70 to 99.8 parts by mass of an aromatic polycarbonate resin having a terminal structure represented by formula (1); 0.2 to 5 parts by mass of a polyether having a number average molecular weight of 6000 or less; and 0 to 29.8 parts by mass of other thermoplastic resins other than the aromatic polycarbonate resin having a terminal structure represented by formula (1). In formula (1), R 1 It represents an alkyl group having 8 to 36 carbon atoms or an alkenyl group having 8 to 30 carbon atoms. #imgabs0#

Description

Technical Field

[0001] The present invention relates to a resin composition, a flat plate-shaped molded body, a multilayer body, a molded article, and a method for producing the molded article. Background Art

[0002] Polycarbonate resin not only has excellent transparency, but also boasts superior processability and impact resistance compared to glass. Furthermore, unlike other plastic materials, it produces less toxic gases, leading to its widespread use in various fields. It is also used as a material for thermoforming applications such as vacuum forming and air pressure forming.

[0003] On the other hand, polycarbonate resin generally has low surface hardness, so the surface of molded articles made of polycarbonate resin tends to be easily scratched. Therefore, when polycarbonate resin is formed into a film, methods are being explored to prevent surface scratches by forming a layer containing an acrylic resin or a hard coating (protective layer) on the surface.

[0004] For example, Patent Document 1 discloses a molding resin sheet comprising a laminated sheet having a coating layer composed mainly of an acrylic resin (B) on one side of a base layer, wherein the base layer comprises as a main component a polycarbonate resin composition (A) composed of a polymer alloy of an aromatic polycarbonate (A1) and another resin (A2). The molding resin sheet is characterized in that the absolute value of the difference between the glass transition temperatures of the polycarbonate resin composition (A) and the acrylic resin (B) is within 30°C.

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: Japanese Patent Application Laid-Open No. 2009-196153 Summary of the Invention

[0008] Technical issues to be solved by the invention

[0009] As described above, in the case of a multilayer body having an acrylic resin layer and a hard coat layer formed on a film formed from a polycarbonate resin, acrylic resin generally has a lower glass transition temperature than polycarbonate resin. Therefore, during thermoforming, particularly when using a mold with a small radius of curvature, the acrylic resin layer overstretches, and the hard coat layer cannot follow the deformation, resulting in cracks in the hard coat layer. To address this phenomenon, although it is possible to suppress the deformation of the acrylic resin by thermoforming at low temperatures, when the multilayer body is thermally bent at low temperatures, the multilayer body may return to its original shape after thermal bending (rebound). Furthermore, it is known that even if the occurrence of rebound can be suppressed, the transparency of the film formed from the polycarbonate resin itself may sometimes deteriorate.

[0010] The object of the present invention is to solve the above-mentioned technical problems and to provide a resin composition for producing a polycarbonate resin film or sheet that does not rebound even when subjected to heat bending molding together with an acrylic resin layer and has excellent transparency, as well as a method for producing a flat plate-shaped molded body, a multilayer body, and a molded article using the above-mentioned resin composition.

[0011] Technical solutions to technical problems

[0012] The inventors of the present invention have studied the above problems and have found that the above technical problems can be solved by using a resin composition containing an aromatic polycarbonate resin having a predetermined terminal structure and a polyether having a number average molecular weight of 6,000 or less.

[0013] Specifically, the above-mentioned problems are solved by the following technical solutions.

[0014] <1> A resin composition comprising: 70 to 99.8 parts by mass of an aromatic polycarbonate resin having a terminal structure represented by formula (1); 0.2 to 5 parts by mass of a polyether having a number average molecular weight of 6000 or less; and 0 to 29.8 parts by mass of another thermoplastic resin other than the aromatic polycarbonate resin having a terminal structure represented by formula (1).

[0015]

[0016] (In formula (1), R 1 represents an alkyl group having 8 to 36 carbon atoms or an alkenyl group having 8 to 30 carbon atoms. 2 Each independently represents a halogen atom, an alkyl group having 1 to 20 carbon atoms, or an aryl group having 6 to 12 carbon atoms. n represents an integer of 0 to 4. * represents a bonding site with another site.

[0017] <2> The resin composition according to <1>, wherein the other thermoplastic resin comprises an aromatic polycarbonate resin having a terminal structure represented by formula (2).

[0018]

[0019] (In formula (2), R 2 Each independently represents a halogen atom, an alkyl group having 1 to 20 carbon atoms, or an aryl group having 6 to 12 carbon atoms. t-Bu represents a tert-butyl group. n represents an integer from 0 to 4. * represents a bonding site with another site.

[0020] <3> The resin composition according to <1> or <2>, wherein the glass transition temperature of the resin composition as measured by differential scanning calorimetry is 120° C. or lower.

[0021] <4> The resin composition according to any one of <1> to <3>, wherein the glass transition temperature of the resin composition as measured by differential scanning calorimetry is 100° C. or higher.

[0022] <5> The resin composition according to any one of <1> to <4>, wherein the polyether comprises H(OR x ) y OH-represented polyether, wherein R x is an alkylene group having 2 to 4 carbon atoms, and y is a positive integer.

[0023] <6> The resin composition according to any one of <1> to <5>, wherein the YI value of the resin composition according to any one of <1> to <5> when molded into a thickness of 1 mm is 5 or less.

[0024] <7> The resin composition according to any one of <1> to <5>, wherein the haze when the resin composition according to any one of <1> to <5> is molded into a thickness of 1 mm is 1% or less.

[0025] <8> A flat plate-shaped molded article formed from the resin composition according to any one of <1> to <7>.

[0026] <9> The flat plate-shaped molded article according to <8>, wherein the thickness is 10 to 5,000 μm.

[0027] <10> A multilayer body comprising the flat plate-shaped molded body according to <8> or <9> and a layer containing an acrylic resin.

[0028] <11> The multilayer body according to <10>, wherein the total thickness of the multilayer body is 10 to 10,000 μm.

[0029] <12> The multilayer body according to <10> or <11>, further comprising a hard coat layer, wherein the hard coat layer is laminated in this order: the flat plate-shaped molded body, the layer containing the acrylic resin, and the hard coat layer.

[0030] <13> A molded article formed from the multilayer body according to any one of <10> to <12>, the molded article having a portion having a curvature radius of 50 mmR or less.

[0031] <14> A method for producing a molded article, comprising the step of heat-bending the multilayer body according to any one of <10> to <12> at 105 to 117°C.

[0032] <15> The method for producing a molded article according to <14>, wherein the molded article has a portion having a curvature radius of 50 mmR or less.

[0033] Effects of the Invention

[0034] According to the present invention, there can be provided a resin composition for producing a polycarbonate resin film or sheet that does not rebound even when heat-bend-molded together with an acrylic resin layer and has excellent transparency, as well as a method for producing a flat plate-shaped molded body, a multilayer body, and a molded article using the resin composition. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a diagram schematically showing the layer structure of the multilayer body of the present invention.

[0036] Explanation of symbols

[0037] 1. Multilayer body, 2. Flat-plate molded body (polycarbonate resin film or sheet), 3. Acrylic resin layer, 4. Hard coating layer. DETAILED DESCRIPTION

[0038] Hereinafter, a mode for carrying out the present invention (hereinafter referred to as "this embodiment") will be described in detail. Note that the following this embodiment is an example for explaining the present invention, and the present invention is not limited to this embodiment.

[0039] Furthermore, in this specification, “to” is used to mean that the numerical values ​​described before and after it are included as the lower limit and the upper limit.

[0040] In this specification, various physical property values ​​and characteristic values ​​are values ​​at 23°C unless otherwise specified.

[0041] The terms "flat plate-shaped molded body" and "multilayered body" in this specification encompass objects in the form of films or sheets, respectively. "Film" and "sheet" refer to thin, generally flat molded bodies relative to their length and width, respectively. While there is no clear distinction between "film" and "sheet," generally, a film with a thickness of 250 μm or less is referred to as a "film," and a sheet with a thickness of 250 μm or greater is referred to as a "sheet." Furthermore, "film" and "sheet" in this specification may be single-layer or multilayer.

[0042] In addition, in this specification, "mass parts" represent the relative amount of a component, and "mass %" represents the absolute amount of a component.

[0043] In this specification, "(meth)acrylic acid" means both or either one of acrylic acid and methacrylic acid.

[0044] In this specification, a flat plate-shaped molded body formed from the resin composition of this embodiment may be referred to as a "polycarbonate resin film" or "polycarbonate resin sheet", and a layer containing an acrylic resin may be referred to as an "acrylic resin layer".

[0045] When the standards shown in this specification differ in measurement methods and the like depending on the year, unless otherwise specified, the standards based on the time of application are assumed.

[0046] The resin composition of this embodiment is characterized in that it contains: 70 to 99.8 parts by mass of an aromatic polycarbonate resin having a terminal structure represented by formula (1); 0.2 to 5 parts by mass of a polyether having a number average molecular weight of 6000 or less; and 0 to 29.8 parts by mass of another thermoplastic resin other than the aromatic polycarbonate resin having a terminal structure represented by formula (1). This composition can provide a polycarbonate resin film or sheet that does not rebound and has excellent transparency. In addition, a polycarbonate resin film or sheet with a low YI value can be obtained. In addition, when the acrylic resin layer and the polycarbonate resin film or sheet are formed into a multilayer body, the generation of foreign matter can be suppressed, the generation of cracks after thermal bending can be suppressed, and the heat and moisture resistance of the multilayer body after hot press molding can be improved.

[0047]

[0048] (In formula (1), R 1 represents an alkyl group having 8 to 36 carbon atoms or an alkenyl group having 8 to 30 carbon atoms. 2 Each independently represents a halogen atom, an alkyl group having 1 to 20 carbon atoms, or an aryl group having 6 to 12 carbon atoms. n represents an integer of 0 to 4. * represents a bonding site with another site.

[0049] It can be speculated that in this embodiment, by using an aromatic polycarbonate resin having a specified terminal structure and combining it with a polyether having a number average molecular weight of 6000 or less, the glass transition temperature of the polycarbonate resin film or sheet can be reduced without affecting other properties. Furthermore, it can be speculated that the difference in glass transition temperature between the polycarbonate resin film or sheet and the acrylic resin layer becomes smaller, thereby suppressing the occurrence of cracks and the occurrence of rebound even when hot bending is performed. Generally speaking, when adding additives to a resin, although the glass transition temperature is reduced, it usually has a negative impact on other properties. For example, when combining it with a polyether, the haze generally increases. It can be speculated that in this embodiment, by selecting a polyether with a small molecular weight as the polyether, this problem can be avoided.

[0050] <Aromatic polycarbonate resin>

[0051] The resin composition of this embodiment contains an aromatic polycarbonate resin having a terminal structure represented by formula (1). By using an aromatic polycarbonate resin having a terminal structure represented by formula (1), the glass transition temperature of the polycarbonate resin can be lowered.

[0052]

[0053] (In formula (1), R 1 represents an alkyl group having 8 to 36 carbon atoms or an alkenyl group having 8 to 30 carbon atoms. 2 Each independently represents a halogen atom, an alkyl group having 1 to 20 carbon atoms, or an aryl group having 6 to 12 carbon atoms. n represents an integer of 0 to 4. * represents a bonding site with another site.

[0054] R 1 represents an alkyl group having 8 to 36 carbon atoms or an alkenyl group having 8 to 30 carbon atoms, preferably an alkyl group or alkenyl group having 10 or more carbon atoms, more preferably an alkyl group or alkenyl group having 12 or more carbon atoms, and further preferably an alkyl group or alkenyl group having 14 or more carbon atoms. This lowers the glass transition temperature of the resin and improves the thermal flexibility of the multilayer body. 1 It is preferably an alkyl or alkenyl group having 22 or less carbon atoms, and more preferably an alkyl or alkenyl group having 18 or less carbon atoms. This improves compatibility with other resins. 1 The alkyl group and the alkenyl group are preferably linear or branched, more preferably linear.

[0055] In this embodiment, R 1 Hexadecyl is particularly preferred.

[0056] And, R 1 It may be located at any of the meta, para, and ortho positions, but is preferably located at the meta or para position, and more preferably located at the para position.

[0057] R 2 Each independently represents a halogen atom, an alkyl group having 1 to 20 carbon atoms, or an aryl group having 6 to 12 carbon atoms, and is preferably a fluorine atom, a chlorine atom, a methyl group, an ethyl group, or a phenyl group, and more preferably a fluorine atom, a chlorine atom, or a methyl group.

[0058] n represents an integer of 0 to 4, preferably an integer of 0 to 2, more preferably 0 or 1, and even more preferably 0.

[0059] By using a capping agent such as hexadecyl parahydroxybenzoate, the terminal structure represented by formula (1) can be added to the polycarbonate resin. The details can be found in paragraphs 0022 to 0030 of Japanese Patent Application Laid-Open No. 2019-002023, and these contents are incorporated into this specification.

[0060] In the aromatic polycarbonate resin having a terminal structure represented by formula (1) in the present embodiment, the terminal structure represented by formula (1) may be one type or two or more types.

[0061] In this embodiment, the aromatic polycarbonate resin having a terminal structure represented by formula (1) is preferably a bisphenol polycarbonate resin, more preferably a bisphenol A polycarbonate resin. Furthermore, preferably, 50 mol % or more of the bisphenol polycarbonate resin has at least one terminal structure represented by formula (1).

[0062] The bisphenol A polycarbonate resin may also have other structural units in addition to the carbonate structural units derived from bisphenol A and its derivatives. As dihydroxy compounds constituting such other structural units, for example, the aromatic dihydroxy compounds described in paragraph 0014 of JP-A-2018-154819 can be cited, and these contents are incorporated into this specification.

[0063] In the bisphenol polycarbonate resin of this embodiment, carbonate structural units derived from bisphenol A and its derivatives preferably account for 90% by mass or more of all structural units excluding terminal structures, more preferably 95% by mass or more, and even more preferably 97% by mass or more.

[0064] The method for producing bisphenol A polycarbonate resin is not particularly limited, and any method can be adopted. Examples thereof include interfacial polymerization, melt transesterification, pyridine polymerization, ring-opening polymerization of cyclic carbonate compounds, and solid phase transesterification of prepolymers.

[0065] The weight average molecular weight of the aromatic polycarbonate resin having the terminal structure represented by formula (1) is not particularly limited, but is preferably 10,000 or more, more preferably 20,000 or more, even more preferably 30,000 or more, further preferably 40,000 or more, and even more preferably 50,000 or more. By setting it to be above the above lower limit, there is a tendency to further improve the impact resistance of the multilayer body and the suppression of flow marks during molding. In addition, the weight average molecular weight of the aromatic polycarbonate resin having the terminal structure represented by formula (1) is preferably 200,000 or less, more preferably 150,000 or less, even more preferably 100,000 or less, even more preferably 80,000 or less, and even more preferably 60,000 or less. By setting it to be below the above upper limit, there is a tendency to improve the moldability of the multilayer body.

[0066] The glass transition temperature of the aromatic polycarbonate resin having the terminal structure represented by formula (1) used in this embodiment is preferably 145°C or lower, more preferably 140°C or lower, even more preferably 135°C or lower, further preferably 130°C or lower, and even more preferably 125°C or lower. By setting it below the above upper limit, there is a tendency to further improve the hot bend formability of the multilayer body. In addition, the glass transition temperature of the aromatic polycarbonate resin having the terminal structure represented by formula (1) used in this embodiment is preferably 121°C or higher, more preferably 122°C or higher, and even more preferably 123°C or higher. By setting it above the above lower limit, there is a tendency to further improve the durability in environmental resistance tests such as wet heat tests and high temperature tests.

[0067] <Other thermoplastic resins>

[0068] The resin composition of this embodiment may contain other thermoplastic resins in addition to the aromatic polycarbonate resin having the terminal structure represented by formula (1). By containing other thermoplastic resins, the glass transition temperature of the resin can be adjusted, and the durability in environmental resistance tests such as damp heat tests and high temperature tests tends to be improved.

[0069] The other thermoplastic resin is not particularly limited as long as it can be melt-blended with the aromatic polycarbonate resin having the terminal structure represented by formula (1), and a known thermoplastic resin can be used.

[0070] Examples of other thermoplastic resins include polycarbonate resins other than the aromatic polycarbonate resin having the terminal structure represented by formula (1), polyester resins (preferably aromatic polyester resins), and acrylic resins (preferably aromatic acrylic resins). Polycarbonate resins other than the aromatic polycarbonate resin having the terminal structure represented by formula (1) are preferred.

[0071] As the other polycarbonate resin, an aromatic polycarbonate resin is preferred, and a bisphenol A polycarbonate resin is more preferred.

[0072] The other polycarbonate resin is preferably an aromatic polycarbonate resin having a terminal structure represented by formula (2). Use of such an aromatic polycarbonate resin tends to further improve the transparency of the flat plate-shaped molded article in addition to the above-mentioned effects.

[0073]

[0074] (In formula (2), R 2Each independently represents a halogen atom, an alkyl group having 1 to 20 carbon atoms, or an aryl group having 6 to 12 carbon atoms. t-Bu represents a tert-butyl group. n represents an integer from 0 to 4. * represents a bonding site with another site.

[0075] In formula (2), R 2 The meanings of and n are the same as those of R in formula (1). 2 The preferred range is the same as that of n.

[0076] In the aromatic polycarbonate resin having a terminal structure represented by formula (2) in the present embodiment, the terminal structure represented by formula (2) may be one type or two or more types.

[0077] In this embodiment, the aromatic polycarbonate resin having a terminal structure represented by formula (2) is preferably a bisphenol A polycarbonate resin. In addition, preferably, 50 mol % or more of the bisphenol A polycarbonate resin has at least one terminal structure represented by formula (2).

[0078] The bisphenol A polycarbonate resin may also have other structural units in addition to the carbonate structural units derived from bisphenol A and its derivatives. As dihydroxy compounds constituting such other structural units, for example, aromatic dihydroxy compounds described in paragraph 0014 of JP-A-2018-154819 can be cited, and these contents are incorporated into this specification.

[0079] In the bisphenol polycarbonate resin of this embodiment, carbonate structural units derived from bisphenol A and its derivatives preferably account for 90% by mass or more of all structural units excluding terminal structures, more preferably 95% by mass or more, and even more preferably 97% by mass or more.

[0080] The weight-average molecular weight of the other thermoplastic resin (preferably an aromatic polycarbonate resin having a terminal structure represented by formula (2)) is not particularly limited, but is preferably 10,000 or more, more preferably 20,000 or more, even more preferably 30,000 or more, further preferably 40,000 or more, and even more preferably 50,000 or more. By setting the weight-average molecular weight above the lower limit, the impact resistance of the multilayer body and the suppression of flow marks during molding tend to be further improved. Furthermore, the weight-average molecular weight of the other thermoplastic resin (preferably an aromatic polycarbonate resin having a terminal structure represented by formula (2)) is preferably 200,000 or less, more preferably 150,000 or less, even more preferably 100,000 or less, further preferably 80,000 or less, and even more preferably 60,000 or less. By setting the weight-average molecular weight below the upper limit, the compatibility with the aromatic polycarbonate resin having a terminal structure represented by formula (1) tends to be improved, and the transparency of the molded article tends to be further improved.

[0081] The glass transition temperature of the other thermoplastic resin layer (preferably an aromatic polycarbonate resin having a terminal structure represented by formula (2)) used in this embodiment is preferably 155°C or lower, more preferably 154°C or lower, even more preferably 153°C or lower, further preferably 152°C or lower, and even more preferably 151°C or lower. By setting it below the above upper limit, there is a tendency for the hot bend formability of the multilayer body to be further improved. In addition, the glass transition temperature of the other thermoplastic resin layer (preferably an aromatic polycarbonate resin having a terminal structure represented by formula (2)) used in this embodiment is preferably 145°C or higher. By setting it above the above lower limit, there is a tendency for the durability in environmental resistance tests such as a wet heat test and a high temperature test to be further improved.

[0082] <Polyether having a number average molecular weight of 6000 or less>

[0083] The resin composition of this embodiment contains a polyether having a number average molecular weight of 6000 or less. By containing a polyether having a number average molecular weight of 6000 or less, the glass transition temperature of the obtained polycarbonate resin film or sheet can be lowered, and the influence on other properties can be suppressed.

[0084] The type of the polyether having a number average molecular weight of 6,000 or less is not particularly limited, and a wide range of known compounds can be employed.

[0085] Polyether with a number average molecular weight of less than 6000 is made of H(OR x ) y OH represents, preferably R x is an alkylene group with 2 to 4 carbon atoms, and y is a positive integer. x ) y OH, R x Examples include ethylene, -CH2CH(CH3)-, -CH2CH2CH2-, -CH2CH2CH2CH2-, -CH2CH2CH(CH3)-, and -CH2CH(CH3)CH2-. Two or more types of alkylene groups may be contained in one molecule.

[0086] y is a positive integer, preferably 5 to 136.

[0087] Regarding polyethers having a number average molecular weight of 6000 or less, the number average molecular weight is preferably 5000 or less, more preferably 4000 or less, even more preferably 3000 or less, further preferably 2000 or less, and even more preferably 1200 or less. By setting the number average molecular weight below the upper limit, the transparency of the resulting polycarbonate resin film or sheet is further improved. The lower limit of the number average molecular weight is, for example, preferably 200 or more, more preferably 500 or more, and may be 750 or more. By setting the number average molecular weight above the lower limit, gas generation during molding can be further effectively suppressed.

[0088] The number average molecular weight of the polyether is a number average molecular weight calculated based on the hydroxyl value measured in accordance with JIS K1577.

[0089] The content of the polyether having a number average molecular weight of 6000 or less in the resin composition of the present embodiment is preferably 0.2% by mass or more, more preferably 0.5% by mass or more, and further more preferably 0.8% by mass or more. In addition, it is preferably 5% by mass or less, more preferably 4% by mass or less. By setting it to above the above lower limit, the glass transition temperature of the resulting resin composition can be further effectively reduced, and by setting it to below the above upper limit, the YI value of the polycarbonate resin film or sheet can be effectively reduced.

[0090] <Blending of ingredients>

[0091] The blending ratio of the aromatic polycarbonate resin having a terminal structure represented by formula (1), the polyether having a number average molecular weight of 6000 or less, and the other thermoplastic resin in the resin composition of this embodiment is 70 to 99.8 parts by mass: 0.2 to 5 parts by mass: 0 to 29.8 parts by mass, more preferably 80 to 99.8 parts by mass: 0.5 to 4 parts by mass: 0 to 20 parts by mass. By setting such a ratio, a resin composition with excellent and well-balanced properties such as hot bending properties and transparency can be obtained.

[0092] When the resin composition of this embodiment does not contain other thermoplastic resins, the blending ratio of the aromatic polycarbonate resin having the terminal structure represented by formula (1) and the polyether having a number average molecular weight of 6000 or less is preferably 95 to 99.5 parts by mass: 5 to 0.5 parts by mass, more preferably 96 to 99.5 parts by mass: 4 to 0.5 parts by mass, and even more preferably 99.5 to 97 parts by mass: 3 to 0.5 parts by mass.

[0093] When the resin composition of this embodiment contains another thermoplastic resin, the blending ratio of the aromatic polycarbonate resin having the terminal structure represented by formula (1), the polyether having a number average molecular weight of 6000 or less, and the other thermoplastic resin is preferably 80-90 parts by mass: 0.2-5 parts by mass: 5-20 parts by mass, and more preferably 80-90 parts by mass: 1-4 parts by mass: 5-19 parts by mass. As described above, the other thermoplastic resin is preferably an aromatic polycarbonate resin, and more preferably an aromatic polycarbonate resin having the terminal structure represented by formula (2).

[0094] In the resin composition of the present embodiment, the total amount of the aromatic polycarbonate resin having the terminal structure represented by formula (1), the polyether having a number average molecular weight of 6000 or less, and the other thermoplastic resins blended as needed preferably accounts for 95% by mass or more of the resin composition, more preferably 98% by mass or more, and may also be 99% by mass or more. The upper limit of the above total amount is 100% by mass or less.

[0095] In the resin composition of the present embodiment, the aromatic polycarbonate resin having the terminal structure represented by formula (1), the polyether having a number average molecular weight of 6000 or less, and the other thermoplastic resins mentioned above, which are optionally formulated, may each contain only one type or two or more types. When containing two or more types, the total amount is preferably within the above range.

[0096] <Other ingredients>

[0097] In addition to the above, the resin composition of the present embodiment may further contain a release agent, a heat stabilizer, a flame retardant, a flame retardant auxiliary, an ultraviolet absorber, a colorant, an antistatic agent, a fluorescent whitening agent, an antifogging agent, a fluidity improver, a plasticizer, a dispersant, an antibacterial agent, an antiblocking agent, an impact modifier, a slip modifier, a hue improver, an acid scavenger, etc. These components may be used alone or in combination of two or more.

[0098] The total amount of the above-mentioned other components, if included, is preferably 0.001 to 5 mass %, more preferably 0.001 to 2 mass %, and even more preferably 0.01 to 1 mass % of the resin composition. Anti-blocking is an effect of suppressing adhesion between films, which can be achieved by adding an anti-blocking agent or the like.

[0099] <<Release agent>>

[0100] The resin composition of this embodiment preferably contains a release agent. By containing a release agent, a polycarbonate resin film or sheet having more excellent releasability can be obtained.

[0101] Examples of the release agent include at least one compound selected from aliphatic carboxylic acids, esters of aliphatic carboxylic acids and alcohols, aliphatic hydrocarbon compounds having a number average molecular weight of 200 to 15,000, and polysiloxane silicone oils, and esters of aliphatic carboxylic acids and alcohols are preferred.

[0102] Specific examples of esters of aliphatic carboxylic acids and alcohols include beeswax (a mixture containing myricyl palmitate as a main component), stearyl stearate, behenyl behenate, stearyl behenate, glyceryl monopalmitate, glyceryl monostearate, glyceryl distearate, glyceryl tristearate, pentaerythritol monopalmitate, pentaerythritol monostearate, pentaerythritol distearate, pentaerythritol tristearate, and pentaerythritol tetrastearate.

[0103] Furthermore, as the release agent, the release agents described in paragraph 0032 of JP-A-2017-226848 and paragraph 0056 of JP-A-2018-199745 can also be used, and the contents are incorporated into this specification.

[0104] The content of the release agent in the resin composition, when contained, is preferably 0.001 parts by mass or more, more preferably 0.005 parts by mass or more, relative to 100 parts by mass of the resin component, and is preferably 2 parts by mass or less, more preferably 1 part by mass or less, and even more preferably 0.5 parts by mass or less.

[0105] The release agent may be used alone or in combination of two or more. When two or more release agents are used, the total amount is preferably within the above range.

[0106] <Physical Properties of Resin Composition>

[0107] The glass transition temperature of the resin composition of the present embodiment measured by differential scanning calorimetry is preferably 120°C or less, more preferably 119°C or less, more preferably 118°C or less, further preferably 117°C or less, and further preferably 116°C or less. By setting it below the above upper limit, there is a tendency that the effect of suppressing the rebound during hot bending is further improved. In addition, the glass transition temperature of the resin composition of the present embodiment measured by differential scanning calorimetry is preferably 100°C or more, more preferably 102°C or more, more preferably 105°C or more, further preferably 107°C or more, and further preferably 110°C or more. By setting it above the above lower limit, there is a tendency that the durability in environmental resistance tests such as a wet heat test and a high temperature test is further improved.

[0108] The glass transition temperature is measured by the method described in the examples below.

[0109] The resin composition of this embodiment preferably has excellent transparency. Specifically, the haze of the resin composition of this embodiment when molded into a thickness of 1 mm is preferably 2% or less, more preferably 1% or less, even more preferably 0.5% or less, and even more preferably 0.4% or less. The ideal lower limit is 0%, but in practice it is 0.01% or more.

[0110] Furthermore, when the resin composition is molded into a thickness of 1 mm, the YI value is preferably 5 or less, more preferably 4 or less, even more preferably 3 or less, and even more preferably 2 or less. The ideal lower limit of the YI value is 0, but in practice it is 0.01 or greater. Furthermore, while the YI value can be lowered by adding a bluing agent, there is a tendency for the total light transmittance to decrease. Therefore, the appropriate value can be adjusted in consideration of the intended use, etc.

[0111] <Flat-plate molded body>

[0112] The resin composition of this embodiment is preferably processed into a flat plate-shaped molded body for use. That is, the flat plate-shaped molded body of this embodiment is formed from the resin composition of this embodiment. The flat plate-shaped molded body of this embodiment has excellent resistance to moist heat.

[0113] Examples of the flat plate-shaped molded body include plates, films, and sheets. Furthermore, as described in detail below, the flat plate-shaped molded body may also be included in a multilayer body laminated on another substrate. Furthermore, the flat plate-shaped molded body of this embodiment may be incorporated into a portion of a multilayer body and then subjected to bending or other processing.

[0114] The lower limit of the thickness of the flat plate-shaped molded body is preferably 10 μm or greater, more preferably 20 μm or greater, even more preferably 50 μm or greater, and may be 100 μm or greater. Setting the thickness above this lower limit tends to facilitate molding and improve hardness. While the upper limit of the thickness of the flat plate-shaped molded body is not particularly limited, it is practically 5,000 μm or less.

[0115] The flat plate-shaped molded body of the present embodiment is molded by injection molding, extrusion molding using a T-die, or the like.

[0116] <Multilayered body>

[0117] The flat plate-shaped molded body of the present embodiment can be used as a multilayer body. The multilayer body of the present embodiment includes the flat plate-shaped molded body of the present embodiment and a layer containing an acrylic resin (acrylic resin layer).

[0118] The thickness (total thickness) of the multilayer body is not particularly limited, but is preferably 10 μm or more, more preferably 20 μm or more. The thickness of the multilayer body is preferably 10,000 μm or less, more preferably 5,000 μm or less, and may be 2,000 μm or less.

[0119] The multilayer body of this embodiment preferably further comprises a hard coating layer. The hard coating layer tends to further increase the surface hardness of the multilayer body. The hard coating layer is preferably laminated in the order of the flat plate-shaped molded body, the layer comprising the acrylic resin, and the hard coating layer.

[0120] Figure 1 This is a schematic diagram showing an example of a multilayer body according to the present embodiment. As described above, 1 represents the multilayer body, 2 represents the flat plate-shaped molded body (polycarbonate resin film or sheet), 3 represents the acrylic resin layer, and 4 represents the hard coat layer. As long as the flat plate-shaped molded body 2, acrylic resin layer 3, and hard coat layer 4 are stacked in the order described above, other layers may be present without departing from the spirit of the present embodiment. However, it is preferred that no other layers be present, that is, that they be adjacent to each other.

[0121] Next, the acrylic resin layer will be described. The acrylic resin layer included in the multilayer body of this embodiment is a layer containing acrylic resin (preferably, 80% or more of the layer, more preferably 90% or more of the layer, is acrylic resin). The inclusion of such an acrylic resin layer in the multilayer body of this embodiment tends to further improve the hardness (particularly pencil hardness) of the multilayer body.

[0122] The thickness of the acrylic resin layer is preferably 10 μm or greater, more preferably 20 μm or greater, even more preferably 40 μm or greater, even more preferably 60 μm or greater, and even more preferably 80 μm or greater. Furthermore, the upper limit of the thickness of the acrylic resin layer is preferably 300 μm or less, more preferably 200 μm or less, even more preferably 180 μm or less, even more preferably 150 μm or less, and even more preferably 120 μm or less. This layer thickness ensures sufficient scratch resistance and impact resistance.

[0123] The acrylic resin used in this embodiment is a polymer of (meth)acrylate or a polymer of (meth)acrylate and a monomer other than (meth)acrylate, and its type is not particularly limited. In the polymer of (meth)acrylate and a monomer other than (meth)acrylate, the proportion of (meth)acrylate is preferably 50 mol% or more, more preferably 60 mol% or more.

[0124] The (meth)acrylate may be an aliphatic (meth)acrylate or an aromatic (meth)acrylate, preferably an aliphatic (meth)acrylate. By using a polymer containing an aliphatic (meth)acrylate as a main component (e.g., 90% by mass or more), the generation of foreign matter in the resulting multilayer body can be effectively suppressed.

[0125] Examples of monomers other than (meth)acrylates include styrene monomers such as styrene, maleimide monomers such as maleic anhydride and N-phenylmaleimide, glutaric acid, and glutarimide. Monomers that form lactone ring units are also preferably used.

[0126] In this embodiment, the acrylic resin includes, as an aliphatic (meth)acrylate, a polymer of at least one of methyl methacrylate, methyl acrylate, and ethyl acrylate. Among these, a methyl methacrylate resin (PMMA: also known as polymethyl (meth)acrylate) whose main component (e.g., 85% by mass or more) is a polymer of methyl methacrylate is preferred.

[0127] The weight-average molecular weight of the acrylic resin is not particularly limited, but is preferably 10,000 or more, more preferably 30,000 or more, even more preferably 50,000 or more, further preferably 60,000 or more, and even more preferably 70,000 or more. By setting it to above the lower limit, there is a tendency to effectively suppress the occurrence of cracks during thermal bending. In addition, the weight-average molecular weight of the acrylic resin is preferably 250,000 or less, more preferably 200,000 or less, even more preferably 150,000 or less, even more preferably 100,000 or less, and even more preferably 90,000 or less. By setting it to below the upper limit, there is a tendency to further improve the effect of suppressing the occurrence of flow marks during multilayer molding.

[0128] The glass transition temperature of the acrylic resin layer used in this embodiment is preferably 113°C or higher, more preferably 114°C or higher, even more preferably 115°C or higher, further preferably 117°C or higher, and even more preferably 120°C or higher. By setting the glass transition temperature above this lower limit, the effect of preventing cracks in the molded article during hot bending of the multilayer body tends to be further enhanced. The upper limit is not particularly limited, but is, for example, 200°C or lower.

[0129] The acrylic resin layer is preferably formed by a composition (acrylic resin layer forming composition) containing acrylic resin. In the composition containing acrylic resin, except acrylic resin, other compositions can also be contained within the scope of the purpose of the present embodiment. Other compositions specifically can include other thermoplastic resins, heat stabilizers, flame retardants, flame retardant aids, ultraviolet light absorbers, colorants, antistatic agents, fluorescent whitening agents, antifogging agents, flowability improvers, plasticizers, dispersants, antibacterial agents, antiblocking agents, impact modifiers, sliding modifiers, hue improvers, acid trapping agents, etc. These compositions can be used one or more than two.

[0130] The total amount of the above-mentioned other components in the acrylic resin layer-forming composition, when contained, is preferably 0.001 to 5% by mass of the composition, more preferably 0.001 to 2% by mass, and even more preferably 0.01 to 1% by mass.

[0131] Next, the details of the hard coat layer will be described. The hard coat layer that can be included in the multilayer body of this embodiment is a layer with a higher surface hardness than the polycarbonate resin film or sheet. By including such a hard coat layer, the surface hardness of the multilayer body or molded article can be increased.

[0132] The thickness of the hard coat layer is preferably 0.5 μm or greater, more preferably 1 μm or greater, even more preferably 2 μm or greater, even more preferably 4 μm or greater, and even more preferably 5 μm or greater. By setting the thickness at or above this lower limit, the hard coat layer tends to further improve the pencil hardness of the multilayer body as a whole. The upper limit of the hard coat layer thickness is preferably 20 μm or less, more preferably 15 μm or less, even more preferably 12 μm or less, even more preferably 10 μm or less, and even more preferably 8 μm or less. By setting the thickness at or below this upper limit, the workability during hot bending tends to be further improved.

[0133] The hard coat layer is preferably obtained by applying a hard coat material that can be cured by heat or active energy rays and then curing the material.

[0134] Examples of coatings that cure using active energy rays include resin compositions containing monofunctional or polyfunctional (preferably difunctional to decafunctional) (meth)acrylate monomers or oligomers, alone or in combination. Preferred examples include resin compositions containing monofunctional or polyfunctional (preferably difunctional to decafunctional) urethane (meth)acrylate oligomers. A photopolymerization initiator is preferably added to these resin compositions as a curing catalyst.

[0135] Examples of thermosetting resin coatings include polyorganosiloxane-based and cross-linked acrylic-based coatings. These resin compositions are also commercially available as hard coats for acrylic or polycarbonate resin films or sheets, and can be appropriately selected based on compatibility with the coating line.

[0136] As for the hard coat layer, reference can be made to paragraphs 0045 to 0055 of Japanese Patent Application Laid-Open No. 2013-020130, paragraphs 0073 to 0076 of Japanese Patent Application Laid-Open No. 2018-103518, and paragraphs 0062 to 0082 of Japanese Patent Application Laid-Open No. 2017-213771, and these contents are incorporated into this specification.

[0137] The multilayer body of this embodiment may have other layers in addition to the above-mentioned layers. Specifically, examples thereof include an adhesive layer, a pressure-sensitive adhesive layer, and an antifouling layer.

[0138] In addition, the multilayer body can be subjected to one or more treatments of anti-fingerprint treatment, anti-glare treatment, weather resistance treatment, antistatic treatment, anti-pollution treatment and anti-adhesion treatment on at least one surface. As an example of the outermost surface of the multilayer body at this time, a hard coat can be cited. Furthermore, the so-called anti-adhesion treatment refers to a treatment that can be easily peeled off even if the films are closely fitted to each other, and examples include adding an anti-adhesion agent, arranging concave-convex surfaces of the multilayer body, etc.

[0139] The multilayer body of this embodiment can use a main extruder for extruding the resin composition of this embodiment and a sub-extruder for extruding the composition for forming the acrylic resin layer. The resin is melt-extruded under the conditions of the resins used respectively, introduced into a mold, stacked inside the mold, and formed into a sheet, or formed into a sheet and then stacked to form a multilayer body.

[0140] <Molded products and methods for manufacturing molded products>

[0141] Next, a molded article using the multilayer body of the present embodiment and a method for producing the molded article will be described.

[0142] The molded article of the present embodiment is a molded article formed of the multilayer body of the present embodiment.

[0143] The multilayer body of this embodiment is also excellent in heat bending resistance and is therefore suitable for applications having curved portions, for example, molded articles having a curvature radius of 50 mmR or less (preferably 40 to 50 mmR).

[0144] The molded article of this embodiment is obtained, for example, by heat-bending the multilayer body of this embodiment at 105-117°C. The multilayer body of this embodiment has excellent heat-bending resistance and is therefore particularly advantageous when forming a molded article having a portion with a curvature radius of 50 mmR or less. From the perspective of preventing springback and cracking, heat-bending is preferably performed at a temperature of 110°C or higher, and more preferably at a temperature of 115°C or lower.

[0145] <Application>

[0146] The flat plate-shaped molded body, multilayer body, and molded article of the present embodiment can be suitably used for optical components, design products, anti-reflection molded bodies, and the like.

[0147] The flat plate-shaped molded body, multilayer body and molded product of the present embodiment can be suitable for use in components such as display devices, electrical and electronic equipment, OA equipment, portable information terminals, mechanical parts, home appliances, vehicle parts, various containers, and lighting equipment. Among these, they are particularly suitable for use in surface films, optical materials, and optical discs of various display screens, electrical and electronic equipment, OA equipment, portable information terminals, and home appliances, housings, lighting equipment, and vehicle parts (particularly vehicle interior parts), smart phones, and touch panels. In particular, the molded body of the present embodiment is preferably used as a sensor film for a touch panel and an anti-reflection molded body for various display screens.

[0148] The multilayer body of this embodiment is also excellent in heat bending resistance and is therefore suitable for applications having curved portions, for example, multilayer bodies and molded articles having a portion with a curvature radius of 50 mmR or less (preferably a curvature radius of 40 to 50 mmR).

[0149] [Example]

[0150] Below, enumerate embodiment and the present invention is described in more detail.As long as do not depart from the purpose of the present invention, the material shown in the following embodiment, usage, ratio, processing content, processing sequence etc. can suitably change.Therefore, the scope of the present invention is not limited to the specific example shown below.

[0151] If the measuring equipment used in the examples is difficult to obtain due to discontinuation of its model, other equipment with equivalent performance may be used for measurement.

[0152] 1. Raw materials

[0153] Polycarbonate resin

[0154] T-1380: bisphenol A polycarbonate resin using cetyl p-hydroxybenzoate as an end-capping agent, manufactured by Mitsubishi Gas Chemical Co., Ltd., weight average molecular weight: 55,000, Tg: 124°C.

[0155] E-2000: Bisphenol A polycarbonate resin with a terminal structure of p-tert-butylphenyl, manufactured by Mitsubishi Engineering-Plastics Corporation, E-2000F, weight average molecular weight: 53,000, Tg: 149°C.

[0156] <Polyether having a number average molecular weight of 6000 or less>

[0157] PEG-600: manufactured by NOF Corporation, polyethylene glycol, number average molecular weight 600.

[0158] D-1000: manufactured by NOF Corporation, polypropylene glycol, number average molecular weight 1000.

[0159] PB-700: manufactured by NOF Corporation, polybutylene glycol, number average molecular weight 700.

[0160] <Polyethers having a number average molecular weight exceeding 6000>

[0161] PEG-6000: manufactured by NOF Corporation, polyethylene glycol, number average molecular weight 8800.

[0162] Release agent

[0163] S-100A: Glyceryl monostearate, manufactured by Riken Vitamin Co., Ltd., RIKEMAL S-100A.

[0164] <Acrylic resin layer>

[0165] HT121: manufactured by Arkema Co., Ltd., acrylic resin (PMMA), ALTUGLAS (registered trademark) HT121, Tg: 115° C., weight average molecular weight: 75,800.

[0166] TN001: manufactured by Mitsubishi Chemical Corporation, acrylic resin (PMMA), TN001 Tg: 118° C., weight average molecular weight: 82,600.

[0167] hw55: manufactured by Daicel-Evonik Ltd., acrylic resin (mass ratio of styrene: maleic anhydride: MMA = 15 mass %: 9 mass %: 76 mass %), PLEXIGLAS hw55, Tg: 120°C, weight-average molecular weight: 109,000.

[0168] PM120N: manufactured by Asahi Kasei Chemicals Corporation, acrylic resin (mass ratio of styrene: N-phenylmaleimide: MMA = 4 mass %: 15 mass %: 81 mass %), DELPET PM120N, Tg: 124°C, weight average molecular weight: 121,000.

[0169] 2. Examples 1 to 9, Comparative Examples 1 to 9

[0170] <Production of polycarbonate resin pellets (resin composition)>

[0171] The components listed in Tables 1 to 4 were weighed in the amounts listed in Tables 1 to 4 (the amounts listed in Tables 1 to 4 are expressed in parts by mass). After mixing for 15 minutes using a rotating drum, the mixture was melt-kneaded using a vented twin-screw extruder with a screw diameter of 32 mm ("TEX30α" manufactured by The Nippon Steel Works, Ltd.) at a cylinder temperature of 280°C, and polycarbonate resin pellets (resin composition) were obtained using a strand cutter.

[0172] <Measurement of glass transition temperature (Tig)>

[0173] The glass transition temperature (Tig) of each resin and resin composition was measured by performing two cycles of heating and cooling under the following differential scanning calorimetry (DSC) measurement conditions, and measuring the glass transition temperature (° C.) during the second cycle of heating.

[0174] In the present invention, the glass transition temperature (Tig) is defined as the starting glass transition temperature, where the intersection of a straight line extending the baseline from the low temperature side toward the high temperature side and the tangent line of the inflection point is defined as the starting glass transition temperature, the intersection of a straight line extending the baseline from the high temperature side toward the low temperature side and the tangent line of the inflection point is defined as the ending glass transition temperature, and the midpoint between the starting and ending glass transition temperatures is defined as the intermediate glass transition temperature. The measurement was performed at a starting temperature of 30°C, a heating rate of 10°C / min, a final temperature of 250°C, and a cooling rate of 20°C / min.

[0175] A differential scanning calorimeter (DSC, manufactured by Hitachi High-Technologies Corporation, “DSC7020”) was used as a measuring apparatus.

[0176] <Production of 1mm thick flat plate-shaped molded products>

[0177] The obtained polycarbonate resin pellets (resin composition) were melt-kneaded at a barrel temperature of 280°C using a twin-screw injection molding machine with a vent (Sodick "PE-100", a twin-screw intermeshing type rotating in the same direction with a screw diameter of 29 mm and a plunger diameter of 28 mm), and molded at a mold temperature of 80°C to obtain a flat plate-shaped molded body (100×100×1 mm).

[0178] <Haze measurement>

[0179] The haze (%) of the 1 mm thick flat plate-shaped molded article obtained above was measured using a haze meter under the conditions of a D65 light source and a 10° field of view.

[0180] The haze meter used was "HM-150" manufactured by Murakami Color Research Laboratory.

[0181] <YI (Yellow Index) Measurement>

[0182] The YI value of the 1 mm thick flat plate-shaped molded article obtained above was measured under illumination and light receiving conditions of the di:0° rear spectroscopic method in accordance with JIS Z 8722.

[0183] The spectrocolorimeter used was "SD-6000" manufactured by Nippon Denshoku Industries.

[0184] <Manufacturing of a polycarbonate resin sheet-acrylic resin layer multilayer body (multilayer sheet)>

[0185] A multilayer body was formed using a multilayer extruder having a multi-manifold die connected to each extruder. The multilayer extruder included a single-screw extruder with a screw diameter of 32 mm, a single-screw extruder with a screw diameter of 65 mm, a feed block connected to all the extruders, and a 650 mm wide T-die connected to the feed block. The pellets for forming the acrylic resin layer shown in Tables 1 to 4 were introduced into the single-screw extruder with a screw diameter of 32 mm and extruded at a barrel temperature of 250°C and a discharge rate of 3.6 kg / h. Separately, the resin composition (polycarbonate resin pellets) shown in Tables 1 to 4 was continuously introduced into the single-screw extruder with a screw diameter of 65 mm and extruded at a barrel temperature of 280°C and a discharge rate of 32.4 kg / h. The feed block connected to all the extruders had two types of two-layer distribution pins and a temperature of 270°C. The pellets for forming the acrylic resin layer shown in Tables 1 to 4 and the polycarbonate resin pellets shown in Tables 1 to 4 were introduced and laminated. The extrusion was performed into a sheet through a T-die connected to the front end at a temperature of 270°C. The sheet was then cooled while transferring the mirror surface using three mirror-finished rollers at temperatures of 130°C, 140°C, and 180°C from the upstream side. This yielded a multilayer structure composed of an acrylic resin layer and a polycarbonate resin sheet. The total thickness of the center portion of the resulting multilayer structure was 1000 μm, with the acrylic resin layer having a thickness of 100 μm.

[0186] <Flow mark appearance>

[0187] When the polycarbonate resin pellets (resin composition) were molded into sheets, the presence or absence of flow marks was visually inspected and evaluated by five experts, with the results determined by majority vote.

[0188] Foreign matter

[0189] After two hours of continuous extrusion under the conditions described in the "Production of a Polycarbonate Resin Sheet-Acrylic Resin Layer Multilayer (Multilayer Sheet)" section above, the resulting multilayer body was visually inspected and the number of gel-like foreign matter defects was counted and evaluated. Gel-like foreign matter defects are defects caused by the high molecular weight of the transparent resin composition disrupting the interface layer of the multilayer body, resulting in counts. Evaluation was conducted by five experts, with judgments made by majority vote.

[0190] A: In 2m 2 The average number of defects in the area is less than 3;

[0191] B: At 2m 2 The average number of defects within the area is more than 3.

[0192] <Hard Coating Application>

[0193] To a total of 100 parts by mass of 60 parts by mass of a hexafunctional urethane acrylate oligomer (product name: U6HA, manufactured by Shin-Nakamura Chemical Industry Co., Ltd.), 35 parts by mass of PEG200# diacrylate (product name: 4EG-A, manufactured by Kyoeisha Chemical Co., Ltd.), and 5 parts by mass of an oligomer containing a fluorine-containing group-hydrophilic group-lipophilic group-UV reactive group (product name: RS-90, manufactured by DIC Corporation), 1% by mass of a photopolymerization initiator (product name: I-184 [compound name: 1-hydroxy-cyclohexyl phenyl ketone] manufactured by BASF Corporation) was added. The resulting coating was applied to the surface of the acrylic resin layer of the multilayer body prepared above using a bar coater and irradiated with a metal halide lamp (20 mW / cm 2 ) for 5 seconds to cure the hard coating layer. The thickness of the formed hard coating layer was 6 μm.

[0194] <Hot press molding processability>

[0195] The multilayer body with the hard coating obtained above was used to prepare convex (male) and concave (female) molds with a curvature radius of 50 mmR. Prior to molding, the molds were preheated at 90°C for 1 minute, and the hard coating side was positioned so that the convex side was facing the hard coating. Pressing was performed at a mold temperature of 115°C for 3 minutes, followed by natural cooling to produce a hot-pressed molded body.

[0196] <<Cracks in the bent portion>>

[0197] The hot pressed molded articles were visually evaluated for cracks in the bent portion. The cracks in the bent portion were evaluated according to the following criteria. Five experts performed the evaluation and made a majority vote.

[0198] A: No cracks were observed in the bent portion of the hot-pressed molded body.

[0199] B: Cracks were observed at the bent portion of the hot press-molded body.

[0200] <<Rebound>>

[0201] The hot pressed compact was placed along a 50 mm diameter cylinder and evaluated for springback according to the following criteria as follows: 5 experts evaluated and determined the results by majority vote.

[0202] A: Along the cylinder. (No rebound)

[0203] B: Not along the cylinder. (There is rebound)

[0204] <<Wet heat test after hot press molding>>

[0205] The hot press-molded multilayer body was placed in an environmental testing machine set at 85°C and 85% relative humidity and maintained in this state for 200 hours. The sheet appearance was then evaluated as follows. Evaluations were conducted by five experts, with judgments made by majority vote.

[0206] A: No appearance changes;

[0207] B: Some changes were observed, such as sheet whitening and inability to maintain the shape formed by hot pressing.

[0208] [Table 1]

[0209]

[0210] [Table 2]

[0211]

[0212] [Table 3]

[0213]

[0214] [Table 4]

[0215]

Claims

1. A resin composition, characterized in that contain: 70 to 99.8 parts by mass of an aromatic polycarbonate resin having a terminal structure represented by formula (1); 0.2 to 5 parts by mass of a polyether having a number average molecular weight of 6000 or less; and 0 to 29.8 parts by mass of other thermoplastic resins other than the aromatic polycarbonate resin having the terminal structure represented by formula (1), In formula (1), R 1 represents an alkyl group having 8 to 36 carbon atoms or an alkenyl group having 8 to 30 carbon atoms, R 2 Each independently represents a halogen atom, an alkyl group having 1 to 20 carbon atoms, or an aryl group having 6 to 12 carbon atoms; n represents an integer of 0 to 4; and * represents a bonding site to another site.

2. The resin composition according to claim 1, wherein: The other thermoplastic resin includes an aromatic polycarbonate resin having a terminal structure represented by formula (2), In formula (2), R 2 Each independently represents a halogen atom, an alkyl group having 1 to 20 carbon atoms, or an aryl group having 6 to 12 carbon atoms; t-Bu represents a tert-butyl group; n represents an integer of 0 to 4; and * represents a bonding site to another site.

3. The resin composition according to claim 1 or 2, wherein: The resin composition has a glass transition temperature of 120° C. or lower as measured by differential scanning calorimetry.

4. The resin composition according to claim 1 or 2, wherein: The resin composition has a glass transition temperature of 100° C. or higher as measured by differential scanning calorimetry.

5. The resin composition according to claim 1 or 2, wherein: The polyether comprises H(OR x ) y OH-represented polyether, wherein R x is an alkylene group having 2 to 4 carbon atoms, and y is a positive integer.

6. The resin composition according to claim 1 or 2, wherein: When the resin composition according to claim 1 or 2 is molded into a thickness of 1 mm, the YI value is 5 or less.

7. The resin composition according to claim 1 or 2, wherein: When the resin composition according to claim 1 or 2 is molded into a film having a thickness of 1 mm, the haze is 1% or less.

8. The resin composition according to claim 1, wherein: The other thermoplastic resin includes an aromatic polycarbonate resin having a terminal structure represented by formula (2), The glass transition temperature of the resin composition measured by differential scanning calorimetry is 120° C. or less. The glass transition temperature of the resin composition measured by differential scanning calorimetry is 100° C. or higher. The polyether comprises H(OR x ) y OH-represented polyether, wherein R x is an alkylene group having 2 to 4 carbon atoms, y is a positive integer, The YI value of the resin composition when molded into a thickness of 1 mm is 5 or less, The haze of the resin composition when molded into a thickness of 1 mm is 1% or less. In formula (2), R 2 Each independently represents a halogen atom, an alkyl group having 1 to 20 carbon atoms, or an aryl group having 6 to 12 carbon atoms; t-Bu represents a tert-butyl group; n represents an integer of 0 to 4; and * represents a bonding site to another site.

9. A flat plate-shaped molded body, characterized in that: The resin composition according to any one of claims 1 to 8.

10. The flat plate-shaped molded body according to claim 9, wherein: The thickness is 10 to 5,000 μm.

11. A multilayer body, characterized in that: A flat plate-shaped molded article according to claim 9 or 10 and a layer containing an acrylic resin.

12. The multilayer body according to claim 11, wherein: The total thickness of the multilayer body is 10 to 10,000 μm.

13. The multilayer body according to claim 11 or 12, characterized in that: The hard coating layer further comprises a flat plate-shaped molded body, a layer containing an acrylic resin, and a hard coating layer laminated in this order.

14. A molded article, characterized in that: The multilayer body according to any one of claims 11 to 13 has a portion with a curvature radius of 50 mmR or less.

15. A method for manufacturing a molded article, characterized in that: The method comprises the step of heat-bending the multilayer body according to any one of claims 11 to 13 at 105 to 117°C.

16. The method for manufacturing a molded article according to claim 15, wherein: The molded article has a portion with a curvature radius of 50 mmR or less.

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