JP2022080270A - Resin composition, tabular molding, multilayer body, molding, and method for producing molding - Google Patents

Abstract

To provide a resin composition for producing a polycarbonate resin film or sheet that prevents occurrence of springback even when subjected to heat bend molding together with an acrylic resin layer and has excellent transparency.SOLUTION: A resin composition includes an aromatic polycarbonate resin having a terminal structure represented by the following formula (1), of 70-99.8 pts.mass, a polyether with a number average molecular weight of 6000 or less, of 0.2-5 pts.mass, and another thermoplastic resin of 0-29.8 pts.mass. In formula (1), R1 is a C8-36 alkyl group or a C8-30 alkenyl group.SELECTED DRAWING: Figure 1

Description

The present invention relates to a resin composition, a flat plate-shaped molded product, a multilayer body, a molded product, and a method for producing a molded product.

Polycarbonate resin is widely used in various fields because it has excellent transparency, processability and impact resistance compared to glass, and there is no concern of generating toxic gas compared to other plastic materials. It is used and is also used as a material for thermoforming such as vacuum forming and pressure forming.

On the other hand, since the surface hardness of the polycarbonate resin is generally low, the surface of the molded product made of the polycarbonate resin tends to be easily scratched. Therefore, when the polycarbonate resin is made into a film, it is being studied to form a layer containing an acrylic resin or a hard coat layer (protective layer) on the surface to prevent scratches on the product surface.
For example, Patent Document 1 describes an acrylic resin on one side of a base material layer containing a polycarbonate resin composition (A) composed of a polymer alloy of aromatic polycarbonate (A1) and another resin (A2) as a main component. A laminated sheet provided with a coating layer containing (B) as a main component, wherein the absolute value of the difference in glass transition temperature between the polycarbonate resin composition (A) and the acrylic resin (B) is within 30 ° C. A molding resin sheet characterized by the above is disclosed.

Japanese Unexamined Patent Publication No. 2009-196153

As described above, when a multilayer body of an acrylic resin layer and a hard coat layer is formed on a film formed of a polycarbonate resin, the acrylic resin generally has a lower glass transition temperature than the polycarbonate resin, so that it is thermally molded. At times, especially when molding using a mold having a small radius of curvature, the acrylic resin layer stretches too much, the hard coat cannot follow the deformation, and cracks occur in the hard coat. To solve this problem, thermoforming is performed at a low temperature to suppress the amount of acrylic deformation. However, when the multilayer body is thermoformed at a low temperature, the multilayer body returns to its original shape after thermal bending (spring). Back) occurs. It was also found that even if the occurrence of springback can be suppressed, the transparency of the film itself formed of the polycarbonate resin may be inferior.
An object of the present invention is to solve such a problem, and to manufacture a polycarbonate resin film or sheet having excellent transparency without causing springback even when heat bending is performed together with an acrylic resin layer. It is an object of the present invention to provide a resin composition for producing a flat plate-shaped molded product, a multilayer body, and a method for producing a molded product using the resin composition.

（式（１）中、Ｒ^１は、炭素数８～３６のアルキル基、または、炭素数８～３０のアルケニル基を表す。Ｒ^２は、それぞれ独立に、ハロゲン原子、炭素数１～２０のアルキル基、または、炭素数６～１２のアリール基を表す。ｎは０～４の整数を表す。＊は、他の部位との結合部位である。）
＜２＞前記他の熱可塑性樹脂が式（２）で表される末端構造を有する芳香族ポリカーボネート樹脂を含む、＜１＞に記載の樹脂組成物。

（式（２）中、Ｒ^２は、それぞれ独立に、ハロゲン原子、炭素数１～２０のアルキル基、または、炭素数６～１２のアリール基を表す。ｔ－Ｂｕは、t－ブチル基を表す。ｎは０～４の整数を表す。＊は、他の部位との結合部位である。）
＜３＞前記樹脂組成物の示差走査熱量測定によるガラス転移温度が１２０℃以下である、＜１＞または＜２＞に記載の樹脂組成物。
＜４＞前記樹脂組成物の示差走査熱量測定によるガラス転移温度が１００℃以上である、＜１＞～＜３＞のいずれか１つに記載の樹脂組成物。
＜５＞前記ポリエーテルが、Ｈ（ＯＲ^ｘ）_ｙＯＨで表され、Ｒ^ｘが炭素数２～４のアルキレン基であり、ｙが正の整数であるポリエーテルを含む、＜１＞～＜４＞のいずれか１つに記載の樹脂組成物。
＜６＞＜１＞～＜５＞のいずれか１つに記載の樹脂組成物を１ｍｍの厚さに成形したときのＹＩ値が５以下である、＜１＞～＜５＞のいずれか１つに記載の樹脂組成物。
＜７＞＜１＞～＜５＞のいずれか１つに記載の樹脂組成物を１ｍｍの厚さに成形したときのヘイズが１％以下である、＜１＞～＜５＞のいずれか１つに記載の樹脂組成物。
＜８＞＜１＞～＜７＞のいずれか１つに記載の樹脂組成物から形成された平板状成形体。
＜９＞厚みが１０～５,０００μｍである、＜８＞に記載の平板状成形体。
＜１０＞＜８＞または＜９＞に記載の平板状成形体と、アクリル樹脂を含む層とを有する多層体。
＜１１＞前記多層体の総厚みが１０～１０，０００μｍである、＜１０＞に記載の多層体。
＜１２＞さらに、ハードコート層を有し、前記ハードコート層は、平板状成形体、アクリル樹脂を含む層、ハードコート層の順に積層している、＜１０＞または＜１１＞に記載の多層体。
＜１３＞＜１０＞～＜１２＞のいずれか１つに記載の多層体から形成された成形品であって、曲率半径が５０ｍｍＲ以下の部位を有する、成形品。
＜１４＞＜１０＞～＜１２＞のいずれか１つに記載の多層体を１０５～１１７℃で熱曲成形することを含む、成形品の製造方法。
＜１５＞前記成形品が、曲率半径が５０ｍｍＲ以下の部位を有する、＜１４＞に記載の成形品の製造方法。 As a result of studies by the present inventor based on the above problems, the above problems are 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 6000 or less. I found that I could do it.
Specifically, the above problem was solved by the following means.
<1> 70 to 99.8 parts by mass of an aromatic polycarbonate resin having a terminal structure represented by the formula (1), 0.2 to 5 parts by mass of a polyether having a number average molecular weight of 6000 or less, and the above formula (1). ), A resin composition containing 0 to 29.8 parts by mass of a thermoplastic resin other than the aromatic polycarbonate resin having a terminal structure.

(In the 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 is an independent halogen atom and 1 to 20 carbon atoms, respectively. It represents an alkyl group or an aryl group having 6 to 12 carbon atoms. N represents an integer of 0 to 4. * Is a bonding site with another site.)
<2> The resin composition according to <1>, wherein the other thermoplastic resin contains an aromatic polycarbonate resin having a terminal structure represented by the formula (2).

(In the formula (2), R ² 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 t-butyl group. Represents. N represents an integer from 0 to 4. * Represents a bonding site with another site.)
<3> The resin composition according to <1> or <2>, wherein the glass transition temperature by differential scanning calorimetry of the resin composition is 120 ° C. or lower.
<4> The resin composition according to any one of <1> to <3>, wherein the glass transition temperature of the resin composition by differential scanning calorimetry is 100 ° C. or higher.
<5> The polyether is represented by H (OR ^x ) _y OH, and contains a polyether in which R ^x is an alkylene group having 2 to 4 carbon atoms and y is a positive integer, <1> to <. 4> The resin composition according to any one of.
<6> Any one of <1> to <5>, wherein the YI value when the resin composition according to any one of <1> to <5> is molded to a thickness of 1 mm is 5 or less. The resin composition according to one.
<7> Any one of <1> to <5>, wherein the haze when the resin composition according to any one of <1> to <5> is molded to a thickness of 1 mm is 1% or less. The resin composition according to one.
<8> A flat plate-shaped molded product formed from the resin composition according to any one of <1> to <7>.
<9> The flat plate-shaped molded product according to <8>, which has a thickness of 10 to 5,000 μm.
<10> A multilayer body having the flat plate-shaped molded body according to <8> or <9> and a layer containing an acrylic resin.
<11> The multilayer body according to <10>, wherein the total thickness of the multilayer body is 10 to 10,000 μm.
<12> The multilayer according to <10> or <11>, which further has a hard coat layer, wherein the hard coat layer is laminated in the order of a flat plate-shaped molded body, a layer containing an acrylic resin, and a hard coat layer. body.
<13> A molded product formed from the multilayer body according to any one of <10> to <12>, which has a portion having a radius of curvature of 50 mmR or less.
<14> A method for producing a molded product, which comprises thermally bending the multilayer body according to any one of <14> and <12> at 105 to 117 ° C.
<15> The method for producing a molded product according to <14>, wherein the molded product has a portion having a radius of curvature of 50 mmR or less.

INDUSTRIAL APPLICABILITY According to the present invention, a resin composition for producing a polycarbonate resin film or sheet having excellent transparency without causing springback even when hot bending is performed together with an acrylic resin layer, and the resin composition are used. It has become possible to provide a method for manufacturing a flat plate-shaped molded body, a multilayer body, and a molded product.

FIG. 1 is a diagram schematically showing the layer structure of the multilayer body of the present invention.

Hereinafter, embodiments for carrying out the present invention (hereinafter, simply referred to as “the present embodiment”) will be described in detail. The following embodiments are examples for explaining the present invention, and the present invention is not limited to the present embodiment.
In addition, in this specification, "-" is used in the meaning which includes the numerical values described before and after it as the lower limit value and the upper limit value.
In the present specification, various physical property values and characteristic values shall be at 23 ° C. unless otherwise specified.
The term "plate-shaped molded article" and "multilayer" in the present specification are intended to include those in the shape of a film or a sheet, respectively. The "film" and the "sheet" refer to a molded product having a thickness thin and generally flat with respect to the length and width, respectively. There is no clear distinction between "film" and "sheet", but in general, a film having a thickness of 250 μm or less is referred to as a “film”, and a film having a thickness of 250 μm or more is referred to as a “sheet”. Further, the "film" and "sheet" in the present specification may be a single layer or a multilayer.
In the present specification, "part by mass" indicates a relative amount of a component, and "mass%" indicates an absolute amount of a component.
As used herein, "(meth) acrylic" refers to both acrylic and / or methacrylic.
Further, in the present specification, the flat plate-shaped molded body formed from the resin composition of the present embodiment is referred to as "polycarbonate resin film" and "polycarbonate resin sheet", and the layer containing acrylic resin is referred to as "acrylic resin layer". Sometimes.
If the standards shown in this specification differ from year to year in terms of measurement method, etc., they shall be based on the standards at the time of filing unless otherwise specified.

（式（１）中、Ｒ^１は、炭素数８～３６のアルキル基、または、炭素数８～３０のアルケニル基を表す。Ｒ^２は、それぞれ独立に、ハロゲン原子、炭素数１～２０のアルキル基、または、炭素数６～１２のアリール基を表す。ｎは０～４の整数を表す。＊は、他の部位との結合部位である。） The resin composition of the present embodiment has 70 to 99.8 parts by mass of an aromatic polycarbonate resin having a terminal structure represented by the formula (1) and 0.2 to 5 parts by mass of a polyether having a number average molecular weight of 6000 or less. It is characterized by containing 0 to 29.8 parts by mass of a thermoplastic resin other than the aromatic polycarbonate resin having a terminal structure represented by the above formula (1). With such a configuration, it becomes possible to provide a polycarbonate resin film or sheet that does not generate springback and has excellent transparency. Further, a polycarbonate resin film or sheet having a low YI value can be obtained. In addition, when the acrylic resin layer and the polycarbonate resin film or sheet are made into a multilayer body, the generation of foreign substances can be suppressed, the generation of cracks after thermal bending can be suppressed, and the moisture resistance and heat resistance of the multilayer body after hot press molding can be suppressed. Can be excellent.

(In the 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 is an independent halogen atom and 1 to 20 carbon atoms, respectively. It represents an alkyl group or an aryl group having 6 to 12 carbon atoms. N represents an integer of 0 to 4. * Is a bonding site with another site.)

In the present embodiment, by using an aromatic polycarbonate resin having a predetermined terminal structure and blending a polyether having a number average molecular weight of 6000 or less, the polycarbonate resin film or sheet has an influence on other performance. It is presumed that the glass transition temperature could be lowered without this. Then, it is presumed that the difference in the glass transition temperature between the polycarbonate resin film or sheet and the acrylic resin layer became small, and that the occurrence of springback could be suppressed while suppressing the occurrence of cracks even after thermal bending. Generally, when an additive is added to a resin, the glass transition temperature is lowered, but it usually adversely affects other performance. For example, when a polyether is added, the haze generally increases. In this embodiment, it is presumed that this point could be avoided by selecting a material having a small molecular weight as the polyether.

（式（１）中、Ｒ^１は、炭素数８～３６のアルキル基、または、炭素数８～３０のアルケニル基を表す。Ｒ^２は、それぞれ独立に、ハロゲン原子、炭素数１～２０のアルキル基、または、炭素数６～１２のアリール基を表す。ｎは０～４の整数を表す。＊は、他の部位との結合部位である。） <Aromatic polycarbonate resin>
The resin composition of the present embodiment contains an aromatic polycarbonate resin having a terminal structure represented by the formula (1). By using an aromatic polycarbonate resin having a terminal structure represented by the formula (1), the glass transition temperature of the polycarbonate resin can be lowered.

(In the 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 is an independent halogen atom and 1 to 20 carbon atoms, respectively. It represents an alkyl group or an aryl group having 6 to 12 carbon atoms. N represents an integer of 0 to 4. * Is a bonding site with another site.)

^R1 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 an alkenyl group having 10 or more carbon atoms, and an alkyl group or an alkenyl group having 12 or more carbon atoms. Is more preferable, and more preferably 14 or more alkyl groups or alkenyl groups. This lowers the glass transition temperature of the resin and improves the thermal bendability of the multilayer body. Further, R ¹ is preferably an alkyl group or an alkenyl group having 22 or less carbon atoms, and more preferably an alkyl group or an alkenyl group having 18 or less carbon atoms. This improves compatibility with other resins. R ¹ is preferably an alkyl group. The alkyl group and alkenyl group are preferably a linear or branched alkyl group or alkenyl group, and more preferably a linear alkyl group or alkenyl group.
In this embodiment, R ¹ is particularly preferably a hexadecyl group.
Further, R ¹ may be located at any of the meta position, the para position, and the ortho position, but it is preferably located at the meta position or the para position, and more preferably at the para position. ..

R ² 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 a fluorine atom, a chlorine atom, a methyl group, an ethyl group, or a phenyl group. It is preferably present, and more preferably a fluorine atom, a chlorine atom or a methyl group.
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.

The terminal structure represented by the formula (1) can be added to the polycarbonate resin by using a terminal encapsulant such as parahydroxybenzoic acid hexadecyl ester. For these details, the description in paragraphs 0022 to 0030 of JP-A-2019-002023 can be referred to, and these contents are incorporated in the present specification.
The aromatic polycarbonate resin having the terminal structure represented by the formula (1) in the present embodiment may have one type of terminal structure represented by the formula (1) or two or more types. ..

In the present embodiment, the aromatic polycarbonate resin having the terminal structure represented by the formula (1) is preferably a bisphenol type polycarbonate resin, more preferably a bisphenol A type polycarbonate resin. Further, it is preferable that 50 mol% or more of the bisphenol type polycarbonate resin has at least one terminal structure represented by the formula (1).

The bisphenol A type polycarbonate resin may also have a structural unit other than the carbonate structural unit derived from bisphenol A and its derivative. Examples of the dihydroxy compound constituting such another structural unit include aromatic dihydroxy compounds described in paragraph 0014 of JP-A-2018-154819, and the contents thereof are incorporated in the present specification. ..
In the bisphenol type polycarbonate resin in the present embodiment, the carbonate constituent unit derived from bisphenol A and its derivative preferably occupies 90% by mass or more, and more preferably 95% by mass or more of all the constituent units excluding the terminal structure. , 97% by mass or more is more preferable.

The method for producing the bisphenol A type polycarbonate resin is not particularly limited, and any method can be adopted. Examples thereof include an interfacial polymerization method, a melt transesterification method, a pyridine method, a ring-opening polymerization method for a cyclic carbonate compound, and a solid phase transesterification method for a prepolymer.

The weight average molecular weight of the aromatic polycarbonate resin having the terminal structure represented by the formula (1) is not particularly determined, but is preferably 10,000 or more, and more preferably 20,000 or more. It is more preferably 30,000 or more, further preferably 40,000 or more, and even more preferably 50,000 or more. By setting the value to the lower limit or more, the impact resistance of the multilayer body and the suppression of flow marks during molding tend to be further improved. The weight average molecular weight of the aromatic polycarbonate resin having the terminal structure represented by the formula (1) is preferably 200,000 or less, more preferably 150,000 or less, and 100,000 or less. It is more preferably 80,000 or less, and even more preferably 60,000 or less. By setting the value to the upper limit or less, the formability of the multilayer body tends to be improved.

The glass transition temperature of the aromatic polycarbonate resin having the terminal structure represented by the formula (1) used in the present embodiment is preferably 145 ° C. or lower, more preferably 140 ° C. or lower, and 135 ° C. or lower. It is even more preferably 130 ° C. or lower, and even more preferably 125 ° C. or lower. By setting the value to the upper limit or less, the thermal bending formability of the multilayer body tends to be further improved. Further, the glass transition temperature of the aromatic polycarbonate resin having the terminal structure represented by the formula (1) used in the present embodiment is preferably 121 ° C. or higher, more preferably 122 ° C. or higher, and more preferably 123 ° C. The above is more preferable. By setting the value to the lower limit or more, the durability of environmental resistance tests such as moist heat test and high temperature test tends to be further improved.

（式（２）中、Ｒ^２は、それぞれ独立に、ハロゲン原子、炭素数１～２０のアルキル基、または、炭素数６～１２のアリール基を表す。ｔ－Ｂｕは、t－ブチル基を表す。ｎは０～４の整数を表す。＊は、他の部位との結合部位である。） <Other thermoplastic resins>
The resin composition of the present embodiment may contain a thermoplastic resin other than the aromatic polycarbonate resin having a terminal structure represented by the formula (1). By including other thermoplastic resins, the durability of environmental resistance tests such as wet heat test and high temperature test tends to be improved while adjusting the glass transition temperature of the resin.
The other thermoplastic resin is not particularly specified as long as it is a thermoplastic resin that can be melt-blended with the aromatic polycarbonate resin having the terminal structure represented by the formula (1), and a known thermoplastic resin can be adopted.
The other thermoplastic resin is a polycarbonate resin other than the aromatic polycarbonate resin having a terminal structure represented by the formula (1), a polyester resin (preferably an aromatic polyester resin), and an acrylic resin (preferably an aromatic acrylic resin). ) Is exemplified, and a polycarbonate resin other than the aromatic polycarbonate resin having a terminal structure represented by the formula (1) is preferable.
As the other polycarbonate resin, an aromatic polycarbonate resin is preferable, and a bisphenol A type polycarbonate resin is more preferable.
The other polycarbonate resin is also preferably an aromatic polycarbonate resin having a terminal structure represented by the formula (2). By using such an aromatic polycarbonate resin, in addition to the above effects, the transparency of the flat plate-shaped molded product tends to be further improved.

(In the formula (2), R ² 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 t-butyl group. Represents. N represents an integer from 0 to 4. * Represents a bonding site with another site.)

In formula (2), R ² and n are synonymous with R ² and n in formula (1), respectively, and the preferred range is also the same.
The aromatic polycarbonate resin having the terminal structure represented by the formula (2) in the present embodiment may have one type of terminal structure represented by the formula (2) or two or more types. ..

In the present embodiment, the aromatic polycarbonate resin having the terminal structure represented by the formula (2) is preferably a bisphenol A type polycarbonate resin. Further, it is preferable that 50 mol% or more of the bisphenol A type polycarbonate resin has at least one terminal structure represented by the formula (2).

The bisphenol A type polycarbonate resin may also have a structural unit other than the carbonate structural unit derived from bisphenol A and its derivative. Examples of the dihydroxy compound constituting such another structural unit include aromatic dihydroxy compounds described in paragraph 0014 of JP-A-2018-154819, and the contents thereof are incorporated in the present specification. ..
In the bisphenol type polycarbonate resin in the present embodiment, the carbonate constituent unit derived from bisphenol A and its derivative preferably occupies 90% by mass or more, and more preferably 95% by mass or more of all the constituent units excluding the terminal structure. , 97% by mass or more is more preferable.

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

The glass transition temperature of the other thermoplastic resin (preferably aromatic polycarbonate resin having a terminal structure represented by the formula (2)) layer used in the present embodiment is preferably 155 ° C or lower, and is preferably 154 ° C or lower. It is more preferably 153 ° C or lower, further preferably 152 ° C or lower, and even more preferably 151 ° C or lower. By setting the value to the upper limit or less, the thermal bending formability of the multilayer body tends to be further improved. Further, the glass transition temperature of the other thermoplastic resin (preferably an aromatic polycarbonate resin having a terminal structure represented by the formula (2)) layer used in the present embodiment is preferably 145 ° C. or higher. By setting the value to the lower limit or more, the durability of environmental resistance tests such as moist heat test and high temperature test tends to be further improved.

<Polyester with a number average molecular weight of 6000 or less>
The resin composition of the present 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 performance can be suppressed.
As the polyether having a number average molecular weight of 6000 or less, the type and the like are not particularly specified, and known compounds can be widely used.
A polyether having a number average molecular weight of 6000 or less is preferably represented by H (OR ^x ) _y OH, and preferably contains a polyether in which R ^x is an alkylene group having 2 to 4 carbon atoms and y is a positive integer. .. Here, in one molecule of H (OR ^x ) _y OH, R ^x is an ethylene group, -CH ₂ CH (CH ₃ )-, -CH ₂ CH ₂ CH _2- , -CH ₂ CH ₂ CH ₂ CH ₂ -, -CH ₂ CH ₂ CH (CH ₃ )-,-CH ₂ CH (CH ₃ ) CH 2--, and _two or more kinds of alkylene groups may be contained in one molecule.
y is a positive integer, preferably 5 to 136.
A polyether having a number average molecular weight of 6000 or less preferably has a number average molecular weight of 5000 or less, more preferably 4000 or less, further preferably 3000 or less, and even more preferably 2000 or less. It is even more preferably 1200 or less. By setting the value to the upper limit or less, the transparency of the obtained 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 value to the lower limit or higher, gas generation during molding is more effectively suppressed.
Here, the number average molecular weight of the polyether is a number average molecular weight calculated based on the hydroxyl value measured according to JIS K1577.

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 in the resin composition. It is preferable, and more preferably 0.8% by mass or more. Further, it is preferably 5% by mass or less, and more preferably 4% by mass or less. By setting the temperature to the lower limit or higher, the glass transition temperature of the obtained resin composition can be lowered more effectively, and by setting the value to the upper limit or lower, the YI value of the polycarbonate resin film or sheet is effectively lowered. can do.

<Blend of each ingredient>
The blend ratio of the aromatic polycarbonate resin having the terminal structure represented by the formula (1) in the resin composition of the present embodiment, the polyether having a number average molecular weight of 6000 or less, and the other thermoplastic resin is 70 to 70 to 99.8 parts by mass: 0.2 to 5 parts by mass: 0 to 29.8 parts by mass, 80 to 99.8 parts by mass: 0.5 to 4 parts by mass: 0 to 20 parts by mass. preferable. By setting such a ratio, a resin composition having an excellent balance in thermal bending characteristics, transparency and the like can be obtained.
When the resin composition of the present embodiment does not contain other thermoplastic resins, the blend ratio of the aromatic polycarbonate resin having the terminal structure represented by the formula (1) and the polyether having a number average molecular weight of 6000 or less is 95. ~ 99.5 parts by mass: preferably 5 to 0.5 parts by mass, 96 to 99.5 parts by mass: more preferably 4 to 0.5 parts by mass, 99.5 to 97 parts by mass: It is more preferably 3 to 0.5 parts by mass.
When the resin composition of the present embodiment contains another thermoplastic resin, an aromatic polycarbonate resin having a terminal structure represented by the formula (1), a polyether having a number average molecular weight of 6000 or less, and another thermoplastic resin are used. The blend ratio is preferably 80 to 90 parts by mass: 0.2 to 5 parts by mass: 5 to 20 parts by mass, and 80 to 90 parts by mass: 1 to 4 parts by mass: 5 to 19 parts by mass. More preferred. As described above, the other thermoplastic resin is preferably an aromatic polycarbonate resin, and more preferably an aromatic polycarbonate resin having a terminal structure represented by the formula (2).
The resin composition of the present embodiment contains an aromatic polycarbonate resin having a terminal structure represented by the formula (1), a polyether having a number average molecular weight of 6000 or less, and other thermoplastics as needed. The total amount of the resin preferably occupies 95% by mass or more, more preferably 98% by mass or more, and may occupy 99% by mass or more. Further, the upper limit of the total amount is 100% by mass or less.
The resin composition of the present embodiment is an aromatic polycarbonate resin having a terminal structure represented by the formula (1), a polyether having a number average molecular weight of 6000 or less, and the other thermoplastic resin to be blended as necessary. May contain only one type, or may contain two or more types. When two or more kinds are contained, it is preferable that the total amount is within the above range.

<Other ingredients>
In addition to the above, the resin composition of the present embodiment includes a mold release agent, a heat stabilizer, a flame retardant, a flame retardant aid, an ultraviolet absorber, a colorant, an antistatic agent, a fluorescent whitening agent, an antifogging agent, and a flow. It may contain a sex improver, a plasticizer, a dispersant, an antibacterial agent, an antiblocking agent, an impact improver, a sliding improver, a hue improver, an acid trapping agent and the like. One of these components may be used, or two or more thereof may be used in combination.
When contained, the total amount of the other components is preferably 0.001 to 5% by mass, more preferably 0.001 to 2% by mass, and 0.01 to 1% by mass. % Is more preferable. Anti-blocking refers to the effect of suppressing adhesion between films, and can be achieved by adding an anti-blocking agent or the like.

<< Release agent >>
The resin composition of the present embodiment preferably contains a mold release agent. By containing a mold release agent, a polycarbonate resin film or sheet having better mold release property can be obtained.
The release agent is at least one selected from the group consisting of an aliphatic carboxylic acid, an ester of an aliphatic carboxylic acid and an alcohol, an aliphatic hydrocarbon compound having a number average molecular weight of 200 to 15,000, and a polysiloxane-based silicone oil. Compounds can be mentioned, and esters of aliphatic carboxylic acids and alcohols are preferable.
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, glycerin monopalmitate, and glycerin monostearate. , Glycerin distearate, glycerin tristearate, pentaerythritol monopalmitate, pentaerythritol monostearate, pentaerythritol distearate, pentaerythritol tristearate, pentaerythritol tetrastearate and the like.
In addition, as the release agent, the release agent described in paragraph 0032 of JP-A-2017-226848 and paragraph 0056 of JP-A-2018-199745 can be used, and the contents thereof are incorporated in the present specification. ..

When contained, the content of the release agent in the resin composition is preferably 0.001 part by mass or more, more preferably 0.005 part by mass or more, and more preferably 0.005 part by mass or more with respect to 100 parts by mass of the resin component. Is 2 parts by mass or less, more preferably 1 part by mass or less, still more preferably 0.5 part by mass or less.
Only one type of release agent may be used, or two or more types may be used. When two or more types are used, it is preferable that the total amount is within the above range.

<Physical characteristics of resin composition>
In the resin composition of the present embodiment, the glass transition temperature measured by differential scanning calorimetry is preferably 120 ° C. or lower, more preferably 119 ° C. or lower, further preferably 118 ° C. or lower, and 117 ° C. or lower. It is more preferable that the temperature is 116 ° C. or lower, and it is even more preferable that the temperature is 116 ° C. or lower. By setting the value to the upper limit or less, the effect of suppressing springback during thermal bending tends to be further improved. Further, in the resin composition of the present embodiment, the glass transition temperature measured by differential scanning calorimetry is preferably 100 ° C. or higher, more preferably 102 ° C. or higher, still more preferably 105 ° C. or higher, 107. It is more preferably ° C. or higher, and even more preferably 110 ° C. or higher. By setting the value to the lower limit or more, the durability of environmental resistance tests such as moist heat test and high temperature test tends to be further improved.
The glass transition temperature is measured according to the method described in Examples described later.

The resin composition of the present embodiment is preferably excellent in transparency. Specifically, the haze when the resin composition of the present embodiment is molded to a thickness of 1 mm is preferably 2% or less, more preferably 1% or less, and 0.5% or less. It is more preferably 0.4% or less, and even more preferably 0.4% or less. The lower limit is ideally 0%, but 0.01% or more is practical.
Further, the YI value when the resin composition is molded to a thickness of 1 mm is preferably 5 or less, more preferably 4 or less, further preferably 3 or less, and 2 or less. More preferred. The lower limit of the YI value is ideally 0, but 0.01 or more is practical. Further, by blending a bluing agent, the YI value can be lowered, but the total light transmittance tends to be lowered, and an appropriate value can be adjusted in consideration of the application and the like.

<Plate-shaped molded body>
The resin composition of the present embodiment is preferably processed into a flat plate-shaped molded product and used. That is, the flat plate-shaped molded product of the present embodiment is formed from the resin composition of the present embodiment. The flat plate-shaped molded product of the present embodiment has excellent moisture and heat resistance.
Examples of the flat plate-shaped molded body include a plate, a film, and a sheet. Further, the flat plate-shaped molded body may be included in a multilayer body laminated on another base material or the like, as described in detail later. Further, the flat plate-shaped molded body of the present embodiment may be subjected to bending or the like after being incorporated into a part of the multilayer body.
The thickness of the flat plate-shaped molded product preferably has a lower limit of 10 μm or more, more preferably 20 μm or more, further preferably 50 μm or more, and may be 100 μm or more. By setting the value to the lower limit or more, molding tends to be easier and the hardness tends to be improved. Further, the upper limit of the thickness of the flat plate-shaped molded product is not particularly limited, but it is practically 5,000 μm or less.
The flat plate-shaped molded body of the present embodiment is molded by injection molding, extrusion molding with a T-die, or the like.

<Multilayer>
The flat plate-shaped molded product of the present embodiment can be used as a multilayer body. The multilayer body of the present embodiment has a flat plate-shaped molded body of the present embodiment and a layer containing an acrylic resin (acrylic resin layer).
The thickness of the multilayer body is not particularly limited, but is preferably 10 μm or more, and 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.
The multilayer body of the present embodiment further preferably includes a hard coat layer. By providing the hard coat layer, the surface hardness of the multilayer body tends to be further improved. The hard coat layer is preferably laminated in the order of a flat molded body, a layer containing an acrylic resin, and a hard coat layer.
FIG. 1 is a schematic view showing an example of the multilayer body of the present embodiment. As described above, 1 is a multilayer body, 2 is a flat plate molded body (polycarbonate resin film or sheet), and 3 is an acrylic resin layer. , 4 indicates a hard coat layer. The flat plate-shaped molded body 2, the acrylic resin layer 3, and the hard coat layer 4 may have other layers as long as they are laminated in the above-mentioned order, as long as they do not deviate from the gist of the present embodiment. It preferably has no layers, i.e., adjacent to each other.

Next, the acrylic resin layer will be described. The acrylic resin layer contained in the multilayer body of the present embodiment is a layer containing an acrylic resin (preferably 80% by mass or more of the layer, more preferably 90% by mass or more of the layer is an acrylic resin). When the multilayer body of the present embodiment contains such an acrylic resin layer, the hardness of the multilayer body (particularly, the hardness of the pencil) tends to be further improved.
The thickness of the acrylic resin layer is preferably 10 μm or more, more preferably 20 μm or more, further preferably 40 μm or more, further preferably 60 μm or more, still more preferably 80 μm or more. More preferred. The upper limit of the thickness of the acrylic resin layer is preferably 300 μm or less, more preferably 200 μm or less, further preferably 180 μm or less, further preferably 150 μm or less, and even more preferably 120 μm or less. Is even more preferable. With such a layer thickness, sufficient scratch resistance and impact resistance can be obtained.

The acrylic resin used in the present embodiment is a polymer of (meth) acrylate or a polymer of a monomer other than (meth) acrylate and (meth) acrylate, and the type thereof is not particularly limited. In the polymer of the (meth) acrylate and the monomer other than the (meth) acrylate, the ratio of the (meth) acrylate is preferably 50 mol% or more, more preferably 60 mol% or more.
The (meth) acrylate may be an aliphatic (meth) acrylate or an aromatic (meth) acrylate, and preferably contains an aliphatic (meth) acrylate. By using a polymer containing an aliphatic (meth) acrylate as a main component (for example, 90% by mass or more), it is possible to effectively suppress the generation of foreign substances in the obtained multilayer body.
Examples of the monomer other than the (meth) acrylate include styrene monomers such as styrene, maleic anhydride, and maleimide monomers such as N-phenylmaleimide.

In the present embodiment, the acrylic resin may be, for example, a polymer of at least one of methyl methacrylate, methyl acrylate and ethyl acrylate as the aliphatic (meth) acrylate. Of these, a methylmethacrylic resin (PMMA: also referred to as polymethyl (meth) acrylate) in which the main component (for example, 85% by mass or more) is polymerized from methylmethacrylic acid is preferable.

The weight average molecular weight of the acrylic resin is not particularly determined, but is preferably 10,000 or more, more preferably 30,000 or more, further preferably 50,000 or more, and 60, It is more preferably 000 or more, and even more preferably 70,000 or more. By setting the value to the lower limit or higher, the occurrence of cracks during thermal bending tends to be effectively suppressed. The weight average molecular weight of the acrylic resin is preferably 250,000 or less, more preferably 200,000 or less, further preferably 150,000 or less, and preferably 100,000 or less. It is more preferably 90,000 or less, and even more preferably 90,000 or less. By setting the value to the upper limit or less, the effect of suppressing the generation of flow marks during multi-layer molding tends to be further improved.

The glass transition temperature of the acrylic resin layer used in the present embodiment is preferably 113 ° C. or higher, more preferably 114 ° C. or higher, further preferably 115 ° C. or higher, and preferably 117 ° C. or higher. It is even more preferable, and it is even more preferable that the temperature is 120 ° C. or higher. By setting the value to the lower limit or more, the effect of preventing cracks in the molded product during thermal bending molding of the multilayer body tends to be further improved. The upper limit is not particularly determined, but for example, 200 ° C. or lower is practical.

The acrylic resin layer is preferably formed from a composition containing an acrylic resin (composition for forming an acrylic resin layer). The composition containing the acrylic resin may contain other components in addition to the acrylic resin as long as the gist of the present embodiment is not deviated. Other components include, specifically, other thermoplastic resins, heat stabilizers, flame retardants, flame retardants, UV absorbers, colorants, antistatic agents, optical brighteners, antifogging agents, and fluidity. Examples thereof include improvers, plasticizers, dispersants, antibacterial agents, antiblocking agents, impact improvers, sliding improvers, hue improvers, acid trapping agents and the like. One of these components may be used, or two or more thereof may be used in combination.
When contained, the total amount of the above other components in the composition for forming an acrylic resin layer is preferably 0.001 to 5% by mass, more preferably 0.001 to 2% by mass. , 0.01 to 1% by mass, more preferably.

Next, the details of the hard coat layer will be described. The hard coat layer that may be included in the multilayer body of the present embodiment is a layer having 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 the molded product can be increased.
The thickness of the hard coat layer is preferably 0.5 μm or more, more preferably 1 μm or more, further preferably 2 μm or more, further preferably 4 μm or more, and further preferably 5 μm or more. Is even more preferable. By setting the value to the lower limit or more, the pencil hardness of the entire multilayer body due to the hard coat layer tends to be further improved. The upper limit of the thickness of the hard coat layer is preferably 20 μm or less, more preferably 15 μm or less, further preferably 12 μm or less, further preferably 10 μm or less, and further preferably 8 μm or less. Is even more preferable. By setting the value to the upper limit or less, the workability at the time of thermal bending tends to be further improved.

The hard coat layer is preferably obtained by applying a hard coat material that can be heat-cured or cured by an active energy ray and then curing it.
Examples of the coating material to be cured using the active energy ray include a resin composition composed of one or more monofunctional or polyfunctional (preferably 2 to 10 functional) (meth) acrylate monomers or oligomers, which is preferable. Examples thereof include a resin composition containing a monofunctional or polyfunctional (preferably 2 to 10 functional) urethane (meth) acrylate oligomer. It is preferable to add a photopolymerization initiator as a curing catalyst to these resin compositions.
Examples of the thermosetting resin paint include polyorganosiloxane-based paints and cross-linked acrylic-based paints. Some of such resin compositions are commercially available as acrylic resins, polycarbonate resin films, or hard coat agents for sheets, and may be appropriately selected in consideration of suitability with the coating line.
As the hard coat layer, the description of paragraphs 0045 to 0055 of JP2013-020130, the description of paragraphs 0073 to 0076 of JP-A-2018-103518, and the description of paragraphs 0062-0087 of JP-A-2017-21771. These contents are incorporated herein by reference.

In addition to the above, the multilayer body of the present embodiment may have other layers. Specifically, an adhesive layer, an adhesive layer, an antifouling layer and the like are exemplified.

Further, the multilayer body may be subjected to any one or more of anti-fingerprint treatment, anti-glare treatment, weather resistance treatment, anti-static treatment, anti-contamination treatment and anti-blocking treatment on at least one surface. An example of the outermost surface of the multilayer body at this time is a hard coat layer. Further, the anti-blocking treatment refers to a treatment that enables the films to be easily peeled off even if they are in close contact with each other, and examples thereof include adding an anti-blocking agent and providing irregularities on the surface of the multilayer body.
The multilayer body of the present embodiment uses a main extruder for extruding the resin composition of the present embodiment and a sub extruder for extruding the composition for forming an acrylic resin layer, and melts the resin under the conditions of the resin to be used. A multilayer body can be formed by guiding the resin to an extrusion die and laminating it inside the die to form a sheet, or by forming the sheet and then laminating.

<Molded products and manufacturing methods for molded products>
Next, a molded product and a method for manufacturing the molded product using the multilayer body of the present embodiment will be described.
The molded product of the present embodiment is a molded product formed from the multilayer body of the present embodiment.
Since the multilayer body of the present embodiment is also excellent in thermal bending resistance, it is also suitable for applications having a bent portion. For example, it is also preferably used for a molded product having a portion having a radius of curvature of 50 mmR or less (preferably a radius of curvature of 40 to 50 mmR).
The molded product of the present embodiment can be obtained, for example, by thermally bending the multilayer body of the present embodiment at 105 to 117 ° C. Since the multilayer body of the present embodiment is excellent in thermal bending resistance, it is particularly useful when a molded product having a portion having a radius of curvature of 50 mmR or less is formed. However, from the viewpoint of the generation of springback and cracks, it is more preferable that the temperature is 110 ° C. or higher and the temperature is 115 ° C. or lower.

<Use>
The flat plate-shaped molded product, the multilayer body, and the molded product of the present embodiment can be suitably used for optical parts, design products, antireflection molded products, and the like.
The flat plate-shaped molded body, multilayer body, and molded product of the present embodiment are suitable for display devices, electrical and electronic devices, OA devices, mobile information terminals, mechanical parts, home appliances, vehicle parts, various containers, parts such as lighting equipment, and the like. Used for. Among these, in particular, various displays, electrical and electronic equipment, OA equipment, mobile information terminals and housings of home appliances, lighting equipment and vehicle parts (particularly vehicle interior parts), surface film such as smartphones and touch panels, optical materials, etc. Suitable for optical discs. In particular, the molded product of the present embodiment is preferably used as a sensor film for a touch panel or an antireflection molded product for various displays.
Since the multilayer body of the present embodiment is also excellent in thermal bending resistance, it is also suitable for applications having a bent portion. For example, it is also preferably used for multilayer bodies and molded products having a portion having a radius of curvature of 50 mmR or less (preferably a radius of curvature of 40 to 50 mmR).

Hereinafter, the present invention will be described in more detail with reference to examples. The materials, amounts used, ratios, treatment contents, treatment procedures, etc. shown in the following examples can be appropriately changed as long as they do not deviate from the gist of the present invention. Therefore, the scope of the present invention is not limited to the specific examples shown below.
When the measuring device or the like used in the examples is difficult to obtain due to a discontinued number or the like, measurement can be performed using another device having the same performance.

1. 1. Raw material <polycarbonate resin>
T-1380: Bisphenol A type polycarbonate resin using parahydroxybenzoic acid hexadecyl ester as an end sealant, manufactured by Mitsubishi Gas Chemical Company, Inc., weight average molecular weight: 55,000, Tg: 124 ° C.
E-2000: Bisphenol A type polycarbonate resin whose terminal structure is a pt-butyl phenyl group, manufactured by Mitsubishi Engineering Plastics Co., Ltd., E-2000F, weight average molecular weight: 53,000, Tg: 149 ° C.

<Polyester with a number average molecular weight of 6000 or less>
PEG-600: Polyethylene glycol manufactured by NOF CORPORATION, number average molecular weight 600
D-1000: NOF CORPORATION, polypropylene glycol, number average molecular weight 1000
PB-700: NOF CORPORATION, polybutylene glycol, number average molecular weight 700

<Polyester with a number average molecular weight of more than 6000>
PEG-6000: manufactured by NOF CORPORATION, polyethylene glycol, number average molecular weight 8800

<Release agent>
S-100A: Glycerin monostearate, manufactured by Riken Vitamin Co., Ltd., Rikemar S-100A

<Acrylic resin layer>
HT121: manufactured by Arkema Co., Ltd., acrylic resin (PMMA), ALTUGLAS (registered trademark) HT121 Tg: 115 ° C., weight average molecular weight: 75,800
TN001: Mitsubishi Chemical Corporation, acrylic resin (PMMA), TN001 Tg: 118 ° C, weight average molecular weight: 82,600
hp55: Acrylic resin (styrene: maleic anhydride: MMA mass ratio = 15% by mass: 9% by mass: 76% by mass), PLEXIGLAS hh55, Tg: 120 ° C., weight average molecular weight: 109, manufactured by Daisel Ebony Co., Ltd. 000
PM120N: Asahi Kasei Chemicals Co., Ltd., acrylic resin (styrene: N-phenylmaleimide: MMA mass ratio = 4% by mass: 15% by mass: 81% by mass), Delpet PM120N, Tg: 124 ° C., weight average molecular weight: 121 000

2. 2. Examples 1-9, Comparative Examples 1-9
<Manufacturing of polycarbonate resin pellets (resin composition)>
Each component shown in Tables 1 to 4 was weighed so as to have an addition amount shown in Tables 1 to 4 (addition amounts in Tables 1 to 4 are indicated by parts by mass). Then, after mixing with a tumbler for 15 minutes, the mixture is melt-kneaded at a cylinder temperature of 280 ° C. using a twin-screw extruder with a vent having a screw diameter of 32 mm (“TEX30α” manufactured by Japan Steel Works, Ltd.), and polycarbonate resin pellets (resin) are subjected to strand cutting. Composition) was obtained.

<Measurement of glass transition temperature (Tig)>
The glass transition temperature (Tig) of various resins and resin compositions is increased and decreased in two cycles according to the following differential scanning calorimetry (DSC measurement) conditions, and the glass transition temperature at the time of the second cycle of temperature increase. (° C.) was measured.
The intersection of the straight line extending the baseline on the low temperature side to the high temperature side and the tangent line of the turning point is the starting glass transition temperature, and the straight line extending the baseline on the high temperature side to the low temperature side and the tangent point of the turning point are the intersections. When the end glass transition temperature is used and the intermediate point between the start glass transition temperature and the end glass transition temperature is the intermediate glass transition temperature, the start glass transition temperature is adopted as the glass transition temperature (Tig) in the present invention. The measurement start temperature was 30 ° C., the temperature rise rate was 10 ° C./min, the ultimate temperature was 250 ° C., and the temperature decrease rate was 20 ° C./min.
As a measuring device, a differential scanning calorimeter (DSC, manufactured by Hitachi High-Tech Science Corporation, "DSC7020") was used.

<Manufacturing of 1 mm thick flat plate molded body>
The obtained polycarbonate resin pellet (resin composition) is cylinderd by a biaxial injection molding machine with a vent ("PE-100" manufactured by Sodick, a meshing type co-rotating type with a biaxial screw diameter of 29 mm, and a plunger diameter of 28 mm). It was melt-kneaded at a temperature of 280 ° C. to form a flat plate-shaped molded product (100 × 100 × 1 mm) under the condition of a mold temperature of 80 ° C.

<Measurement of haze>
Using a haze meter, the haze (%) of the 1 mm thick flat plate-shaped molded product obtained above was measured under the condition of a D65 light source 10 ° field of view.
As the haze meter, "HM-150" manufactured by Murakami Color Technology Research Institute was used.

<Measurement of YI (Yellow Index)>
The YI value of the 1 mm thick flat plate-shaped molded product obtained above was measured under the illumination and light receiving conditions of the di: 0 ° post-spectral method according to JIS Z 8722.
As the spectral colorimeter, "SD-6000" manufactured by Nippon Denshoku Kogyo Co., Ltd. was used.

<Manufacturing of multilayer body (multilayer sheet) of polycarbonate resin sheet / acrylic resin layer>
Each is a multi-layer extruder having a single-screw extruder with a shaft diameter of 32 mm, a single-screw extruder with a shaft diameter of 65 mm, a feed block connected to all extruders, and a 650 mm wide T-die connected to the feed block. Multilayers were molded using a multi-layer extruder with a multi-manifold die coupled to the extruder. The acrylic resin layer forming pellets shown in Tables 1 to 4 were introduced into a single-screw extruder having a shaft diameter of 32 mm, and extruded under the conditions of a cylinder temperature of 250 ° C. and a discharge rate of 3.6 kg / h. Further, the resin compositions (polycarbonate resin pellets) shown in Tables 1 to 4 were continuously introduced into a single-screw extruder having a shaft diameter of 65 mm, and the cylinder temperature was 280 ° C. and the discharge amount was 32.4 kg / h. .. The feed block connected to all extruders is equipped with two types and two layers of distribution pins, and at a temperature of 270 ° C., the acrylic resin layer forming pellets shown in Tables 1 to 4 and the polycarbonate resin pellets shown in Tables 1 to 4 are used. Was introduced and laminated. A T-die with a temperature of 270 ° C connected to the tip extrudes it into a sheet, and three mirror-finishing rolls with temperatures of 130 ° C, 140 ° C, and 180 ° C are used to cool the acrylic resin layer while transferring the mirror surface. And a multilayer of polycarbonate resin sheet was obtained. The total thickness of the central portion of the obtained multilayer body was 1000 μm, and the thickness of the acrylic resin layer was 100 μm.

<Appearance of flow mark>
When the above polycarbonate resin pellet (resin composition) was molded into a sheet, the presence or absence of a flow mark was visually confirmed. The evaluation was conducted by five experts and judged by majority vote.

<Foreign matter>
Under the extrusion conditions in the above <manufacturing of a multilayer body (multilayer sheet) of a polycarbonate resin sheet / acrylic resin layer>, the multilayer body obtained after continuous operation for 2 hours was visually observed and the number of gel-like foreign matter defects was counted and evaluated. .. The gel-like foreign matter defect is a high molecular weight body of the resin composition exhibiting transparency, and is counted as a defect by disturbing the interface layer of the multilayer body. The evaluation was conducted by five experts and judged by majority vote.
A: Within the area of 2m ² , the average number of defects is less than 3. B: Within the area of 2m ² , the average number of defects is 3 or more.

<Hard coat layer coating>
6-functional urethane acrylate oligomer (product name: U6HA, manufactured by Shin-Nakamura Chemical Industry Co., Ltd.) 60 parts by mass, PEG200 # diacrylate (product name: 4EG-A, manufactured by Kyoeisha Chemical Co., Ltd.) 35 parts by mass, and fluorine-containing group. Photopolymerization initiator (product name: I-184) for a total of 100 parts by mass of 5 parts by weight of a hydrophilic group, an oil-based group, and a UV-reactive group-containing oligomer (product name: RS-90, manufactured by DIC Co., Ltd.). [Compound name: 1-hydroxy-cyclohexylphenylketone] manufactured by BASF Co., Ltd.) was applied by 1% by mass to the surface of the acrylic resin layer of the multilayer body prepared above with a bar coater, and a metal halide lamp (20 mW) was applied. The hard coat was cured by applying / cm ² ) for 5 seconds. The thickness of the formed hardcoat layer was 6 μm.

<Heat press molding processability>
For the multilayer body with the hard coat layer obtained above, convex (male) and concave (female) molds having a radius of curvature of 50 mmR were produced. Preheated at 90 ° C. for 1 minute before molding, placed in a mold so that the heart coat layer side is convex, pressed at a mold temperature of 115 ° C. for 3 minutes, and naturally cooled to obtain a hot press molded product. Was produced.

<< Cracks in the bent part >>
The cracks in the bent portion of the hot press molded product were visually evaluated. The cracks in the bent portion were evaluated as follows according to the following criteria. The evaluation was conducted by five experts and judged by majority vote.
A: No cracks can be seen in the bent part of the hot press molded body.
B: Cracks can be seen in the bent part of the hot press molded body.

<< Springback >>
The hot press molded product was placed along a 50 mmR cylinder, and the springback was evaluated as follows according to the following criteria. The evaluation was conducted by five experts and judged by majority vote.
A: Along the cylinder. (No spring back)
B: Does not follow the cylinder. (With spring back)

<< Wet heat test after hot press molding >>
The multilayer body after hot press molding was placed in an environmental tester set at a temperature of 85 ° C. and a relative humidity of 85%, and kept in that state for 200 hours. After that, the appearance of the sheet was evaluated as follows. The evaluation was conducted by five experts and judged by majority vote.
A: No change in appearance
B: Some changes were observed, for example, the sheet was whitened, did not retain the shape of hot press molding, etc.

1 Multilayer 2 Flat plate (polycarbonate resin film or sheet)
3 Acrylic resin layer 4 Hard coat layer

Claims (15)

70 to 99.8 parts by mass of an aromatic polycarbonate resin having a terminal structure represented by the formula (1),
0.2 to 5 parts by mass of a polyether having a number average molecular weight of 6000 or less,
A resin composition containing 0 to 29.8 parts by mass of a thermoplastic resin other than the aromatic polycarbonate resin having a terminal structure represented by the formula (1).

(In the 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 is an independent halogen atom and 1 to 20 carbon atoms, respectively. It represents an alkyl group or an aryl group having 6 to 12 carbon atoms. N represents an integer of 0 to 4. * Is a bonding site with another site.) The resin composition according to claim 1, wherein the other thermoplastic resin contains an aromatic polycarbonate resin having a terminal structure represented by the formula (2).

(In the formula (2), R ² 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 t-butyl group. Represents. N represents an integer from 0 to 4. * Represents a bonding site with another site.) The resin composition according to claim 1 or 2, wherein the glass transition temperature measured by differential scanning calorimetry of the resin composition is 120 ° C. or lower. The resin composition according to any one of claims 1 to 3, wherein the glass transition temperature measured by differential scanning calorimetry of the resin composition is 100 ° C. or higher. Any of claims 1 to 4, wherein the polyether is represented by H (OR ^x ) _y OH, R ^x is an alkylene group having 2 to 4 carbon atoms, and y is a positive integer. The resin composition according to item 1. The resin composition according to any one of claims 1 to 5, wherein the YI value when the resin composition according to any one of claims 1 to 5 is molded to a thickness of 1 mm is 5 or less. .. The resin composition according to any one of claims 1 to 5, wherein the haze when the resin composition according to any one of claims 1 to 5 is molded to a thickness of 1 mm is 1% or less. .. A flat plate-shaped molded product formed from the resin composition according to any one of claims 1 to 7. The flat plate-shaped molded product according to claim 8, which has a thickness of 10 to 5,000 μm. A multilayer body having the flat plate-shaped molded body according to claim 8 or 9 and a layer containing an acrylic resin. The multilayer body according to claim 10, wherein the multilayer body has a total thickness of 10 to 10,000 μm. The multilayer body according to claim 10 or 11, further comprising a hard coat layer, wherein the hard coat layer is laminated in the order of a flat plate-shaped molded body, a layer containing an acrylic resin, and a hard coat layer. A molded product formed from the multilayer body according to any one of claims 10 to 12, which has a portion having a radius of curvature of 50 mmR or less. A method for producing a molded product, which comprises hot-curving the multilayer body according to any one of claims 10 to 12 at 105 to 117 ° C. The method for manufacturing a molded product according to claim 14, wherein the molded product has a portion having a radius of curvature of 50 mmR or less.

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