CN113906102B - Composition, film, and method for producing film - Google Patents
Composition, film, and method for producing film Download PDFInfo
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- CN113906102B CN113906102B CN202080039449.2A CN202080039449A CN113906102B CN 113906102 B CN113906102 B CN 113906102B CN 202080039449 A CN202080039449 A CN 202080039449A CN 113906102 B CN113906102 B CN 113906102B
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Abstract
The invention provides a composition capable of providing a transparent film having high sliding property, heat resistance and turbidity inhibition, a film formed by the composition and a manufacturing method of the film. The composition comprises: 25 to 70 parts by mass of bisphenol A polycarbonate (A) having a weight average molecular weight of 20,000 to 35,000; 26.5 to 71.5 parts by mass of an aromatic polycarbonate (B) other than the bisphenol A polycarbonate (A), the aromatic polycarbonate (B) having a glass transition temperature of 160 ℃ or higher as measured by a differential scanning calorimeter; and 3.5 to 7.5 parts by mass of a polyarylate (C) having a weight average molecular weight of 45,000 to 80,000.
Description
Technical Field
The present invention relates to compositions, films, and methods of making films.
Background
Transparent conductive films are used in film sensors for touch panels, electronic paper, dye-sensitized solar cells, touch sensors, and the like. As the transparent conductive film 10, for example, as shown in fig. 1, a film including an electrode layer (transparent conductive film) 11, a base film 12, an adhesive layer 13, and a protective film 14 is known.
For example, patent document 1 discloses a transparent conductive film laminate comprising a pressure-sensitive adhesive layer, a film base material, and a transparent conductive film in this order on a protective film, characterized in that: at least one of the film base and the protective film has a concave-convex portion on the surface of the adhesive layer side in each end region extending from one end portion and the other end portion in the width direction to the inside of 100mm in the width direction, the effective roughness R1 of the surface of the concave-convex portion in each end region is 0.1 to 20 [ mu ] m, and the adhesive layer is provided between the concave-convex portion in one end region and the concave-convex portion in the other end region in the width direction over a distance of 0 to 10mm from the concave-convex portion in one end region to a distance of 0 to 10mm from the concave-convex portion in the other end region. Further, it is described that a polycarbonate-based resin is used as the protective film.
On the other hand, patent document 2 discloses, as a resin composition comprising a polycarbonate resin and a polyarylate resin, a resin composition comprising a polycarbonate resin (a) and a polyarylate resin (B), wherein the polycarbonate resin (a) comprises a polycarbonate resin (a-1) having a polystyrene-equivalent weight average molecular weight (Mw) of 7 to less than 20 ten thousand and a polycarbonate resin (a-2) having a polystyrene-equivalent weight average molecular weight (Mw) of 4 to less than 7 ten thousand. The resin composition is described as being used for a flat film excellent in repeated bending resistance for a flat panel display for a mobile device and a touch panel display which are subjected to impact or the like.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2018-152187
Patent document 2: japanese patent laid-open publication No. 2014-015509
Disclosure of Invention
Technical problem to be solved by the invention
A protective film is generally used for the transparent conductive film. Such a protective film is used to protect the substrate film when the laminate of the electrode layer and the substrate film is transferred. That is, the protective film is used for preventing adhesion on the opposite side of the electrode layer.
The protective film is required to have slidability to such an extent that the film is not stacked in order to improve the film transferability and prevent winding wrinkles. Further, since the transparent conductive film is subjected to on-line defect detection in a state where a protective film is attached, a transparent film in which cloudiness is suppressed is required. Further, heat resistance is also required depending on the application.
The present invention has been made to solve the above problems, and an object of the present invention is to provide a composition capable of providing a transparent film having high slidability, heat resistance, and suppressed cloudiness, and a film formed from the composition and a method for producing the film.
Technical solution for solving technical problem
The present inventors have conducted studies based on the above-mentioned problems, and as a result, have found that the use of a specific polyarylate and a specific aromatic polycarbonate and the adjustment of the content ratio thereof can successfully improve the sliding property without deteriorating the transparency while increasing the heat resistance, and have completed the present invention. Specifically, the technical problem is solved by the following technical scheme.
< 1 > a composition comprising: 25 to 70 parts by mass of bisphenol A polycarbonate (A) having a weight average molecular weight of 20,000 to 35,000; 26.5 to 71.5 parts by mass of an aromatic polycarbonate (B) other than the bisphenol A polycarbonate (A), the aromatic polycarbonate (B) having a glass transition temperature of 160 ℃ or higher as measured by a differential scanning calorimeter; and 3.5 to 7.5 parts by mass of a polyarylate (C) having a weight average molecular weight of 45,000 to 80,000.
< 2 > the composition as < 1 > wherein: the aromatic polycarbonate (B) other than the bisphenol A polycarbonate (A) is a bisphenol AP polycarbonate.
Compositions of < 3 > such as < 1 > or < 2 > wherein: the glass transition temperature of the composition is 160 ℃ or higher as measured by a differential scanning calorimeter.
< 4 > a film formed from the composition as defined in any one of < 1 > to < 3 >.
< 5 > as < 4 > wherein: the coefficient of dynamic friction between the film and a film having a root mean square roughness of 0.093 μm, as measured at a slide speed of 100 mm/min and a load cell of 10N, is 2.0 or less.
< 6 > such as < 4 > or < 5 > wherein: the thickness of the film is 10 to 300 μm.
[ 7 ] the film according to any one of [ 4 ] to [ 6 ], wherein: the haze is 10% or less.
< 8 > a transparent conductive film having the film described in any one of < 4 > -to < 7 >, an adhesive layer, a film substrate and an electrode layer in this order.
< 9 > a method for producing a film, wherein: a film is produced by extruding a composition in a molten state into a sheet form and pressure-bonding the sheet with a pair of rolls, at least 1 roll surface of the pair of rolls having a type A durometer hardness of 10 to 99, the composition comprising: 25 to 70 parts by mass of bisphenol A polycarbonate (A) having a weight average molecular weight of 20,000 to 35,000; 26.5 to 71.5 parts by mass of an aromatic polycarbonate (B) other than the bisphenol A polycarbonate (A), the aromatic polycarbonate (B) having a glass transition temperature of 160 ℃ or higher as measured by a differential scanning calorimeter; and 3.5 to 7.5 parts by mass of a polyarylate (C) having a weight average molecular weight of 45,000 to 80,000.
< 10 > such as < 9 > wherein: the aromatic polycarbonate (B) other than the bisphenol A polycarbonate (A) is a bisphenol AP polycarbonate.
< 11 > such as < 9 > or < 10 > in which: the glass transition temperature of the composition is 160 ℃ or higher as measured by a differential scanning calorimeter.
The method of producing a film described in any of < 12 > to < 11 >, wherein: the coefficient of dynamic friction between the film and a film having a root mean square roughness of 0.093 μm as measured at a slide speed of 100 mm/min and a load cell of 10N is 2.0 or less.
The method of producing a film described in any of < 13 > to < 9 > -12 > wherein: the thickness of the film is 10 to 300 μm.
The method of producing a film described in any of < 14 > to < 9 > -13 >, wherein: the haze of the film is 10% or less.
Effects of the invention
According to the present invention, a composition capable of providing a transparent film having high slidability, heat resistance, and suppressed clouding, a film formed from the composition, and a method for producing the film can be provided.
Drawings
Fig. 1 is a schematic cross-sectional view showing an example of the layer structure of the transparent conductive film.
FIG. 2 (a) is a schematic view showing a state where a smooth polycarbonate film is slid on a smooth polycarbonate film; fig. 2 (b) is a schematic view of a state in which a polycarbonate film having fine irregularities on the surface thereof is slid on a polycarbonate film having fine irregularities on the surface thereof.
Fig. 3 shows an example of a schematic view when viewed from the cross-sectional direction of the film of the present invention.
FIG. 4 is a schematic view showing an example of the film production method of the present invention.
Detailed Description
The present invention will be described in detail below. In the present specification, "to" is used to include numerical values before and after the "to" as a lower limit value and an upper limit value.
The composition of the present invention is characterized by containing: 25 to 70 parts by mass of bisphenol A polycarbonate (A) having a weight average molecular weight of 20,000 to 35,000; 26.5 to 71.5 parts by mass of an aromatic polycarbonate (B) other than the bisphenol A polycarbonate (A) (hereinafter sometimes referred to as "polycarbonate (B) having a Tg of 160 ℃ or higher") having a glass transition temperature of 160 ℃ or higher as measured by a differential scanning calorimeter; and 3.5 to 7.5 parts by mass of a polyarylate (C) having a weight average molecular weight of 45,000 to 80,000.
With such a configuration, a transparent film having high slidability, heat resistance, and suppressed haze (low haze) can be provided. Further, the total light transmittance can be improved.
That is, the film formed from the composition of the present invention is required to have adhesion (blocking resistance) between films suppressed from the viewpoint of improving the film transferability and preventing the winding wrinkle. The term "adhesion prevention" means: even if the films are closely adhered to each other, they can be easily peeled off. In other words, the film formed from the composition of the present invention is required to have slidability to the extent that it does not accumulate. Fig. 2 (a) is a schematic view showing a state where a smooth polycarbonate film is slid on a smooth polycarbonate film. In this way, when a smooth polycarbonate film is placed on a smooth polycarbonate film, the film has no sliding property. In order to impart slidability to such a polycarbonate film, it is conceivable to provide fine irregularities on the surface of the film as shown in the schematic view of fig. 2 (b). When fine irregularities are provided on the surface of the film, the contact area between the films is reduced, and high slidability can be achieved. In fig. 2, 21 is a polycarbonate film having a smooth surface, and 22 is a polycarbonate film having fine irregularities on the surface.
As a means for providing fine irregularities on the surface of the film in this manner, a known method is known. For example, a method of forming fine irregularities on the surface of a film by using a roll having fine irregularities on the surface thereof is exemplified. In this method, a molten film is passed between rolls having fine irregularities on the surface thereof to form fine irregularities. However, in the method using a roller having fine irregularities on the surface, the fine irregularities transferred to the film surface may be changed due to abrasion of the roller caused by long-term use. As another method, there is a method of adding fine particles to a film to form fine irregularities on the surface of the film from the fine particles. However, in the method of adding fine particles, there is a case where transparency is impaired due to a difference in refractive index between the fine particles and the resin.
Accordingly, in the present invention, as a new method, fine irregularities are formed on the surface of the film by blending the polymer. Specifically, the following mechanism is assumed.
That is, fig. 3 is a schematic view of the film 30 of the present invention viewed from the cross-sectional direction, wherein X represents polyarylate and Y represents aromatic polycarbonate. That is, in the present invention, the polycarbonate (B) having a Tg of 160 ℃ or higher, which is excellent in heat resistance, is blended as an aromatic polycarbonate with a bisphenol a type polycarbonate (a) having a relatively small weight average molecular weight, whereby the heat resistance of the whole aromatic polycarbonate is improved, and the aromatic polycarbonates are made compatible with each other to maintain transparency. Further, the compatibility between the polyarylate X and the aromatic polycarbonate Y is intentionally deteriorated to form a sea-island structure, thereby improving the sliding property. More specifically, the use of the bisphenol a polycarbonate (a) having a weight average molecular weight of 20,000 to 35,000 and the polyarylate (C) having a weight average molecular weight of 45,000 to 80,000 suppresses the compatibility of the two and forms fine irregularities on the surface of the film. It is also presumed that the amount of the polyarylate (C) is adjusted to suppress the clouding and to obtain a film having high transparency.
The composition of the present invention comprises a bisphenol A polycarbonate (A) having a weight average molecular weight of 20,000 to 35,000, a polycarbonate (B) having a Tg of 160 ℃ or higher, a polyarylate (C) having a weight average molecular weight of 45,000 to 80,000, and optionally an antioxidant (D), an ester interchange inhibitor (E), a release agent (F) and other components.
< bisphenol A type polycarbonate (A) >)
The composition of the present invention contains bisphenol A polycarbonate (A) having a weight average molecular weight of 20,000 to 35,000. By blending an aromatic polycarbonate having a relatively low molecular weight and a polyarylate having a relatively high molecular weight in this manner, the compatibility between the polyarylate (C) and the bisphenol a polycarbonate (a) is adjusted not to be excessively high.
The weight average molecular weight of the bisphenol A polycarbonate (A) is 20,000 or more, preferably 22,000 or more, and more preferably 23,000 or more. The weight average molecular weight of the bisphenol a polycarbonate (a) is 35,000 or less, preferably 33,000 or less, more preferably 31,000 or less, and may be 28,000 or less, and may be 26,000 or less.
The weight average molecular weight of the bisphenol A polycarbonate (A) was measured in accordance with the description of examples described later.
The weight average molecular weight when the composition contains 2 or more bisphenol a polycarbonate (a) is the weight average molecular weight of a mixture of bisphenol a polycarbonate (a) (hereinafter, the same applies to other physical properties, and the same applies to other resin components).
The glass transition temperature (Tg) of the bisphenol A polycarbonate (A) is usually less than 160 ℃, preferably 155 ℃ or less, more preferably 145 ℃ or less, and may be 140 ℃ or less or 139 ℃ or less. The lower limit is, for example, 100 ℃ or higher, and may be 120 ℃ or higher and 130 ℃ or higher.
The glass transition temperature (Tg) of bisphenol A polycarbonate (A) was measured as described in examples described later.
The bisphenol A polycarbonate is a resin having a carbonate structural unit derived from bisphenol A and a derivative thereof, and preferably has a structural unit represented by the following formula (A-1). Wherein denotes a bonding position with other structural units or terminal groups.
In the formula (A-1), X1The following structure is shown.
R5And R6Is an alkyl group or a hydrogen atom, at least one of which is preferably a methyl group, and both of which are more preferably methyl groups.
The formula (A-1) is preferably represented by the following formula (A-2).
The content of the structural unit represented by the formula (A-1) in the bisphenol A polycarbonate (A) is preferably 70 mol% or more, more preferably 80 mol% or more, and still more preferably 90 mol% or more of all the structural units except both terminals. The upper limit is not particularly limited, and may be such that 100 mol% is the structural unit represented by the formula (A-1). The bisphenol A polycarbonate is particularly preferably a resin in which substantially all of the structural units other than both terminals are composed of the structural unit of the formula (A-1). The term "substantially all the structural units except for both terminals" as used herein means that 99.0 mol% or more, preferably 99.5 mol% or more, and more preferably 99.9 mol% or more of all the structural units except for both terminals are contained.
The bisphenol a polycarbonate (a) may have a structural unit other than a carbonate structural unit derived from bisphenol a and a derivative thereof. As the dihydroxy compound constituting such another structural unit, for example, the aromatic dihydroxy compounds described in paragraph 0014 of Japanese patent laid-open publication No. 2018-154819 can be cited, and these contents are incorporated into the present specification.
The method for producing the bisphenol a polycarbonate (a) is not particularly limited, and any method may be employed. Examples thereof include an interfacial polymerization method, a melt transesterification method, a pyridine method, a ring-opening polymerization method of a cyclic carbonate compound, a solid-phase transesterification method of a prepolymer, and the like. < the glass transition temperature of 160 ℃ or higher, and an aromatic polycarbonate (B) other than the bisphenol A polycarbonate (A) >
The composition of the present invention contains an aromatic polycarbonate (B) (polycarbonate (B) having a Tg of 160 ℃ or higher) other than the bisphenol A polycarbonate (A), the glass transition temperature of which is 160 ℃ or higher as measured by a differential scanning calorimeter. Thus, by blending a polycarbonate having high heat resistance, the heat resistance of the composition or film can be improved
The polycarbonate (B) having a Tg of 160 ℃ or higher is preferably 165 ℃ or higher, more preferably 168 ℃ or higher, may be 172 ℃ or higher, or may be 175 ℃ or higher. The upper limit is preferably 210 ℃ or lower, more preferably 200 ℃ or lower, and still more preferably 190 ℃ or lower.
The glass transition temperature (Tg) was measured by the method described in the examples described later.
The polycarbonate (B) having a Tg of 160 ℃ or higher is preferably a bisphenol AP type polycarbonate, a bisphenol Z type polycarbonate or a bisphenol TMC type polycarbonate, and more preferably a bisphenol AP type polycarbonate.
In one embodiment of the polycarbonate (B) having a Tg of 160 ℃ or higher in the present invention, it comprises at least a bisphenol AP type polycarbonate.
The bisphenol AP type polycarbonate is a resin having a carbonate structural unit derived from bisphenol AP and a derivative thereof. Bisphenol Z polycarbonate is also contemplated.
The bisphenol AP type polycarbonate preferably has a structural unit represented by the following formula (B-1).
Wherein denotes a bonding position with other structural units or terminal groups.
In the formula (B-1), R1～R4Each independently represents a fluorine atom, a chlorine atom, a bromine atom, an iodine atom, an alkyl group having 1 to 9 (preferably 1 to 3) carbon atoms, an aryl group having 6 to 12 (preferably 6 to 10) carbon atoms, an alkoxy group having 1 to 5 (preferably 1 to 3) carbon atoms, an alkenyl group having 2 to 5 (preferably 2 or 3) carbon atoms, or an aralkyl group having 7 to 17 (preferably 7 to 11) carbon atoms. l represents an integer of 0 to 5. m and n are each independently an integer of 0 to 4.
The structural unit represented by the formula (B-1) is preferably a structural unit represented by the following formula (B-2). Wherein represents a bonding position with other structural units or terminal groups.
R1、R2、R3、R4The meanings of l, m and n are the same as those in the formula (B-1).
The structural unit represented by the formula (B-2) is preferably a structural unit represented by the following formula (B-3). Wherein represents a bonding position with other structural units or terminal groups.
The content of the structural unit represented by the formula (B-1) in the bisphenol AP type polycarbonate is preferably 70 mol% or more, more preferably 80 mol% or more, and still more preferably 90 mol% or more of all the structural units except both terminals. The upper limit is not particularly limited, and may be such that 100 mol% is the structural unit represented by the formula (B-1). The structural unit derived from bisphenol AP may be only 1 type, or may be composed of 2 or more types. The bisphenol AP type polycarbonate is particularly preferably a resin in which substantially all structural units other than both terminals are composed of the structural unit of the formula (B-1). The term "substantially all structural units other than both terminals" as used herein means 99.0 mol% or more, preferably 99.5 mol% or more, and more preferably 99.9 mol% or more of all structural units other than both terminals.
The bisphenol Z-type polycarbonate and the bisphenol TMC-type polycarbonate preferably have a structural unit represented by the following formula (B-4). Wherein represents a bonding position with other structural units or terminal groups.
In the formula (B-4), R8Each independently represents a fluorine atom, a chlorine atom, a bromine atom, an iodine atom, an alkyl group having 1 to 9 (preferably 1 to 3) carbon atoms, an aryl group having 6 to 12 (preferably 6 to 10) carbon atoms, an alkoxy group having 1 to 5 (preferably 1 to 3) carbon atoms, an alkenyl group having 2 to 5 (preferably 2 or 3) carbon atoms or an aralkyl group having 7 to 17 (preferably 7 to 11) carbon atoms. q represents an integer of 0 to 5, preferably an integer of 1 to 3.
R8Each of the alkyl groups is preferably an alkyl group having 1 to 9 (preferably 1 to 3) carbon atoms, and more preferably a methyl group.
The structural unit represented by the formula (B-4) is preferably a structural unit represented by the following formula (B-5). Wherein represents a bonding position with other structural units or terminal groups.
In the formula (B-5), R8With respect to the formula (B-4)R8Similarly, the preferred ranges are also the same.
The bisphenol AP type polycarbonate may have other structural units than carbonate structural units derived from bisphenol AP and derivatives thereof. The bisphenol Z type polycarbonate may have other structural units than carbonate structural units derived from bisphenol Z and derivatives thereof. The bisphenol TMC type polycarbonate may have other structural units than the carbonate structural units derived from bisphenol TMC and derivatives thereof. As the dihydroxy compound constituting such another structural unit, for example, the aromatic dihydroxy compound described in paragraph 0014 of Japanese patent laid-open publication No. 2018-154819 can be cited, and these contents are incorporated into the present specification.
The method for producing the polycarbonate (B) having a Tg of 160 ℃ or higher is not particularly limited, and any method can be employed. Examples thereof include an interfacial polymerization method, a melt transesterification method, a pyridine method, a ring-opening polymerization method of a cyclic carbonate compound, a solid-phase transesterification method of a prepolymer, and the like.
The weight average molecular weight of the polycarbonate (B) having a Tg of 160 ℃ or higher is preferably 15,000 or higher, more preferably 20,000 or higher, and may exceed 35,000. The weight average molecular weight of the polycarbonate (B) having a Tg of 160 ℃ or higher is preferably 100,000 or less, more preferably 80,000 or less, and still more preferably 60,000 or less.
The weight average molecular weight of the polycarbonate (B) having a Tg of 160 ℃ or higher was measured as described in examples described later.
< polyarylate (C) >
The composition of the present invention contains a polyarylate (C) having a weight average molecular weight of 45,000 to 80,000. In this way, by blending a polyarylate having a relatively high molecular weight and a bisphenol a polycarbonate (a) having a relatively low molecular weight, the compatibility between the bisphenol a polycarbonate (a) and the polyarylate (C) is adjusted not to be excessively high.
The weight average molecular weight of the polyarylate (C) is preferably 50,000 or more, more preferably 55,000 or more, and still more preferably 60,000 or more. The weight average molecular weight of the polyarylate (C) is preferably 75,000 or less, more preferably 70,000 or less, and still more preferably 66,000 or less. When the upper limit of the weight average molecular weight of the polyarylate (C) is 80,000 or less, the haze increase of the film can be effectively suppressed.
The glass transition temperature (Tg) of the polyarylate (C) is usually less than 300 ℃ and preferably 280 ℃ or less. The lower limit is, for example, 130 ℃ or higher, preferably 150 ℃ or higher, and more preferably 180 ℃ or higher.
The glass transition temperature (Tg) of the polyarylate (C) was measured as described in examples described later.
The intrinsic viscosity of the polyarylate (C) is preferably 0.49dL/g or more, more preferably 0.55dL/g or more, still more preferably 0.59dL/g or more, and further preferably 0.62dL/g or more. When the lower limit value of the intrinsic viscosity of the polyarylate (C) is 0.49dL/g or more, the slidability can be more effectively exhibited in the production of a film. The polyarylate (C) has an intrinsic viscosity of preferably not more than 0.84dL/g, more preferably not more than 0.79dL/g, and still more preferably not more than 0.74 dL/g. When the upper limit value of the intrinsic viscosity of the polyarylate (C) is 0.84dL/g or less, the haze increase of the film can be more effectively suppressed.
The intrinsic viscosity of the polyarylate (C) was measured as described in the examples described later.
The polyarylate (C) used in the present invention is preferably an aromatic polyester composed of a structural unit derived from an aromatic dicarboxylic acid and a structural unit derived from a bisphenol.
Examples of the aromatic dicarboxylic acid include terephthalic acid, isophthalic acid, 1, 4-naphthalenedicarboxylic acid, 1, 5-naphthalenedicarboxylic acid, 2, 6-naphthalenedicarboxylic acid, benzophenonedicarboxylic acid, 4 ' -diphenyldicarboxylic acid, 3 ' -diphenyldicarboxylic acid, and 4,4 ' -diphenyletherdicarboxylic acid.
Examples of the bisphenol include 2, 2-bis (4-hydroxyphenyl) propane, 2-bis (4-hydroxy-3, 5-dimethylphenyl) propane, 2-bis (4-hydroxy-3, 5-dibromophenyl) propane, 2-bis (4-hydroxy-3, 5-dichlorophenyl) propane, 4 ' -dihydroxydiphenylsulfone, 4 ' -dihydroxydiphenylether, 4 ' -dihydroxydiphenylsulfide, 4 ' -dihydroxydiphenylketone, 4 ' -dihydroxydiphenylmethane, 1-bis (4-hydroxyphenyl) cyclohexane, 1-bis (4-hydroxyphenyl) -1-phenylethane, 1-bis (4-hydroxyphenyl) -3,3, 5-trimethylcyclohexane, and the like. These compounds may be used alone, or 2 or more of them may be used in combination.
The method for producing the polyarylate (C) is not particularly limited, and a polyarylate obtained by a known method can be used. The polyarylate (C) obtained by the interfacial polymerization method or the melt polymerization method can be suitably used.
< blending of bisphenol A type polycarbonate (A), polycarbonate (B) having Tg of 160 ℃ or higher and polyarylate (C) >)
The composition of the present invention contains 25 to 70 parts by mass of bisphenol A polycarbonate (A), 26.5 to 71.5 parts by mass of polycarbonate (B) having a Tg of 160 ℃ or higher, and 3.5 to 7.5 parts by mass of polyarylate (C). By setting such a blending ratio, fine irregularities can be formed on the surface of the film.
More preferably, the polycarbonate resin composition contains 30 to 50 parts by mass of bisphenol A polycarbonate (A), 40 to 65 parts by mass of polycarbonate (B) having a Tg of 160 ℃ or higher, and 3.5 to 7.5 parts by mass of polyarylate (C).
More preferably, the polycarbonate resin composition contains 32 to 40 parts by mass of bisphenol A polycarbonate (A), 51 to 65 parts by mass of polycarbonate (B) having a Tg of 160 ℃ or higher, and 4 to 6 parts by mass of polyarylate (C).
The content of the bisphenol a polycarbonate (a) in the composition is preferably 25% by mass or more, and more preferably 32% by mass or more. The upper limit is preferably 70% by mass or less, and more preferably 40% by mass or less.
The content of the polycarbonate (B) having a Tg of 160 ℃ or higher in the composition is preferably 26.5% by mass or higher, more preferably 51% by mass or higher. The upper limit is preferably 71.5% by mass or less, and more preferably 65% by mass or less.
The content of the polyarylate (C) in the composition is preferably 3.5% by mass or more, and more preferably 4% by mass or more. The upper limit is preferably 7.5% by mass or less, and more preferably 6% by mass or less.
However, the total of the bisphenol A polycarbonate (A), the polycarbonate (B) having a Tg of 160 ℃ or higher and the polyarylate (C) is not more than 100% by mass.
An embodiment of the composition of the present invention includes an embodiment in which the total content of the bisphenol a polycarbonate (a), the polycarbonate (B) having a Tg of 160 ℃ or higher, and the polyarylate (C) is 95% by mass or more of the composition, a further embodiment in which the total content is 97% by mass or more of the composition, and particularly a further embodiment in which the total content is 98% by mass or more of the composition.
The composition of the present invention may contain only 1 bisphenol A type polycarbonate (A), or may contain 2 or more types. When 2 or more species are contained, the total amount is preferably within the above range.
The composition of the present invention may contain only 1 kind of polycarbonate (B) having a Tg of 160 ℃ or higher, or may contain 2 or more kinds. When 2 or more species are contained, the total amount is preferably within the above range.
The composition of the present invention may contain only 1 polyarylate (C), or may contain 2 or more polyarylates. When 2 or more species are contained, the total amount is preferably in the above range.
The difference (Mwc-Mwa) between the weight average molecular weight of the polyarylate (C) and the weight average molecular weight of the bisphenol A polycarbonate (A) is preferably 25,000 or more, and may be 30,000 or more. The difference (Mwc-Mwa) is preferably 45,000 or less. By setting the range as above, more excellent slidability of the film can be achieved.
< antioxidant (D) >
The composition of the present invention preferably contains an antioxidant.
The antioxidant includes a phenol-based antioxidant, an amine-based antioxidant, a phosphorus-based antioxidant, a thioether-based antioxidant, and the like, and preferably at least 1 of the phosphorus-based antioxidant and the phenol-based antioxidant (more preferably, a hindered phenol-based antioxidant), and particularly preferably a phosphorus-based antioxidant. It is also preferable to use both together.
The phosphorus-based antioxidant is preferably a phosphite ester compound represented by the following formula (1) or (2).
(in the formula (1), R1And R2Each independently represents an alkyl group having 1 to 30 carbon atoms or an aryl group having 6 to 30 carbon atoms. )
(in the formula (2), R3～R7Each independently represents a hydrogen atom, an aryl group having 6 to 20 carbon atoms, or an alkyl group having 1 to 20 carbon atoms. )
In the above formula (1), R1、R2The alkyl groups are preferably each independently a linear or branched alkyl group having 1 to 10 carbon atoms. At R1、R2In the case of an aryl group, the aryl group is preferably represented by any of the following general formulae (1-a), (1-b) or (1-c).
(in the formula (1-a), RAEach independently represents an alkyl group having 1 to 10 carbon atoms. In the formula (1-b), RBEach independently represents an alkyl group having 1 to 10 carbon atoms. )
Examples of the phenolic antioxidant include hindered phenolic antioxidants. As the phenol-based antioxidant, the phenol-based antioxidant described in paragraph 0041 of Japanese patent application laid-open No. 2019-002023 and the phenol-based antioxidant described in paragraphs 0033-0034 of Japanese patent application laid-open No. 2019-056035 are preferably used, and these contents are incorporated in the present specification.
Further, the details of the antioxidant can be found in paragraphs 0057 to 0061 of Japanese patent application laid-open No. 2017-031313, which are incorporated herein by reference.
When contained, the content of the antioxidant in the composition is preferably 0.005 parts by mass or more, more preferably 0.007 parts by mass or more, and still more preferably 0.01 parts by mass or more, based on 100 parts by mass of the resin component (which is the total of the bisphenol a polycarbonate (a), the polycarbonate (B) having a Tg of 160 ℃ or more, and the polyarylate (C)). The upper limit of the content of the antioxidant is preferably 4 parts by mass or less, more preferably 1 part by mass or less, even more preferably 0.5 part by mass or less, and even more preferably 0.1 part by mass or less, per 100 parts by mass of the resin component.
When the content of the antioxidant is 0.005 parts by mass or more, the transparency tends to be further improved. Further, when the content of the antioxidant is 4 parts by mass or less, the moist heat stability tends to be improved.
When the antioxidant is used in combination with a phosphorus antioxidant and a phenol antioxidant (preferably a hindered phenol antioxidant), the content thereof is preferably in the range of 0.001 to 0.2 parts by mass of the phosphorus antioxidant and 0.001 to 0.2 parts by mass of the phenol antioxidant per 100 parts by mass of the resin component.
The antioxidant may be used in 1 type or 2 or more types. When 2 or more species are used, the total amount is preferably in the above range.
< transesterification preventing agent (E) >)
Preferably, the composition of the present invention contains a transesterification inhibitor.
Examples of the transesterification inhibitor include a phosphorus-based transesterification inhibitor and a sulfur-based transesterification inhibitor.
Examples of the phosphorus-based transesterification inhibitor include phosphorous acid, phosphoric acid, phosphonous acid, phosphonic acid, and esters thereof.
As the transesterification preventing agent, the descriptions of paragraphs 0035 to 0039 of International publication No. 2015/190162, 0037 of Japanese patent application laid-open Nos. 2019-002023 and 0041 of Japanese patent application laid-open No. 2018-199745 can be referred to and incorporated in the present specification.
When the ester interchange inhibitor is contained in the composition, the content is preferably 0.001 parts by mass or more, more preferably 0.005 parts by mass or more, and still more preferably 0.007 parts by mass or more, per 100 parts by mass of the resin component. The upper limit of the content of the transesterification preventing agent is preferably 1.0 part by mass or less, more preferably 0.5 part by mass or less, even more preferably 0.3 part by mass or less, and even more preferably 0.1 part by mass or less, per 100 parts by mass of the thermoplastic resin.
The ester interchange inhibitor may contain only 1 kind, or may contain 2 or more kinds. When 2 or more species are contained, the total amount is preferably in the above range.
< Release agent (F) >
Preferably, the composition of the present invention contains a release agent.
The release agent includes at least 1 compound 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 silicone oil, and is preferably an ester of an aliphatic carboxylic acid and an alcohol.
Specific examples of the ester of an aliphatic carboxylic acid and an alcohol include beeswax (a mixture mainly composed of melissa palmitate), stearyl stearate, behenyl behenate, stearyl behenate, glyceryl monopalmitate, glyceryl monostearate, glyceryl distearate, glyceryl tristearate, pentaerythritol monopalmitate, pentaerythritol monostearate, pentaerythritol distearate, pentaerythritol tristearate, pentaerythritol tetrastearate, and the like.
Further, as the release agent, the release agents described in paragraphs 0032 of jp 2017-226848 and 0056 of jp 2018-199745 can be used, and the contents thereof are incorporated in the present specification.
When the release agent is contained in the composition, the content is preferably 0.001 parts by mass or more, more preferably 0.005 parts by mass or more, and preferably 2 parts by mass or less, more preferably 1 part by mass or less, and more preferably 0.5 parts by mass or less, relative to 100 parts by mass of the resin component.
The release agent may be used in only 1 kind, or may be used in 2 or more kinds. When 2 or more species are used, the total amount is preferably in the above range.
< other ingredients >
The composition may contain, in addition to the above, other thermoplastic resins, heat stabilizers, flame retardants, flame retardant aids, ultraviolet absorbers, colorants, antistatic agents, fluorescent brighteners, antifogging agents, flowability improvers, plasticizers, dispersants, antibacterial agents, antiblocking agents, impact modifiers, slip modifiers, hue modifiers, acid scavengers, and the like. These components may be used in 1 kind, or 2 or more kinds may be used together.
When the total amount of the other components is contained, the total amount is preferably 0.001 to 5% by mass, more preferably 0.001 to 2% by mass, and still more preferably 0.01 to 1% by mass of the composition.
< Properties of the composition >
The glass transition temperature of the composition of the present invention measured by a differential scanning calorimeter is preferably 160 ℃ or higher. The upper limit of the glass transition temperature is not particularly limited, but the required performance can be sufficiently satisfied even at 200 ℃ or lower, and further 190 ℃ or lower, 180 ℃ or lower, and 170 ℃ or lower, for example.
< characteristics of film >
The composition of the present invention can be formed into a film. The thickness of the film is preferably 10 μm to 300 μm. By setting the thickness to 300 μm or less, a transparent film can be formed. Further, the haze tends to be further reduced by making the thickness of the film 10 μm or more.
The thickness of the film of the present invention may be 20 μm or more, and further may be 25 μm or more. Further, it is preferably 250 μm or less, more preferably 200 μm or less, still more preferably 150 μm or less, yet more preferably 100 μm or less, yet more preferably 80 μm or less, and yet more preferably 60 μm or less.
The coefficient of dynamic friction between the film of the present invention and a film having a root mean square roughness of 0.093 μm is preferably 2.0 or less, and more preferably 1.8 or less. The lower limit value is, for example, 0.1 or more.
The coefficient of dynamic friction is a value measured under the conditions that the slider speed is 100 mm/min and the load cell is 10N, and specifically, is measured by the method described in the examples described later.
The total light transmittance of the film of the present invention under a condition of a field of view of 10 ° from a D65 light source is preferably 80% or more, more preferably 85% or more, and still more preferably 88% or more. The upper limit of the light transmittance is preferably 100%, but the required performance can be sufficiently satisfied even when the light transmittance is 94% or less.
The total light transmittance was measured by the method described in the examples described below.
The haze of the film of the present invention is preferably 10% or less, more preferably 8% or less, may be 6% or less, and may be 5% or less. The lower limit value is preferably 0%, but is a practical level even when 0.1% or more is used. Particularly preferably, the haze is in the above range when the thickness is 10 μm to 300. mu.m.
The haze was measured by the method described in the examples described later.
< use >)
The film of the present invention is preferably used as a masking film. More preferably used as a protective film for the transparent conductive film. In particular, it is preferably used in the form of a transparent conductive film comprising the film of the present invention, a pressure-sensitive adhesive layer, a film substrate and an electrode layer in this order.
The transparent conductive film is preferably used as a film sensor for a touch panel, a transparent conductive film used for an electronic paper, a dye-sensitized solar cell, a touch sensor, or the like.
In addition to the above, the film of the present invention is preferably used for a film for applications requiring high slidability and transparency.
< method for producing film >
The film production method of the present invention is a film production method comprising extruding a composition in a molten state into a sheet form, and pressure-bonding the sheet with a pair of rolls, wherein at least 1 roll surface of the pair of rolls has a type a durometer hardness of 10 to 99, and the composition comprises: 25 to 70 parts by mass of bisphenol A polycarbonate (A) having a weight average molecular weight of 20,000 to 35,000; 26.5 to 71.5 parts by mass of an aromatic polycarbonate (B) other than the bisphenol A polycarbonate (A), the aromatic polycarbonate (B) having a glass transition temperature of 160 ℃ or higher as measured by a differential scanning calorimeter; and 3.5 to 7.5 parts by mass of a polyarylate (C) having a weight average molecular weight of 45,000 to 80,000.
With this structure, a film in which islands of polyarylate (C) are formed in the polycarbonate can be obtained.
The following describes the details of the production method of the present invention.
FIG. 4 is a schematic view showing an example of the film production method of the present invention. In the production method of the present invention, for example, as shown in fig. 4, a composition 41 containing the bisphenol a polycarbonate (a), the polycarbonate (B) having a Tg of 160 ℃ or higher, and the polyarylate (C) is extruded from a die 42 in a molten state into a sheet shape. The composition 41 in a molten state and in a sheet form is pressed by a pair of rollers 43 (a first roller 43a and a second roller 43b) when passing between the pair of rollers 43. At this time, at least 1 of the first roller 43a and the second roller 43b is a roller having a type A durometer hardness of 10 to 99 on the roller surface.
In FIG. 4, the first roller 43a is a roller having a surface with a durometer hardness of 10 to 99. That is, as the first roller 43a, a roller having a soft surface is used. By using a roller having a surface hardness of 10 to 99, a portion of the polyarylate (C) which is not compatible with the bisphenol A polycarbonate (A) appears on the surface of the film, and fine irregularities are formed on the surface of the film. As a result, high slidability can be achieved. The hardness of the roller surface is preferably 30 or more, more preferably 50 or more, and preferably 80 or less, more preferably 75 or less. By setting the range as above, the roller is made moderately soft. The roller having a surface with a durometer hardness of 10 to 99, for example, a mirror surface rubber roller.
The roller temperature at which the surface hardness of the roller is 10 to 99 is preferably 30 to 90 ℃, and more preferably 40 to 70 ℃.
In fig. 4, the composition passes between the pair of rollers 43 (the first roller 43a and the second roller 43b), and then passes through the transfer roller 44.
Examples of the rollers other than the roller having a surface hardness of 10 to 99, for example, the second roller 43b and the conveying roller 44 in fig. 4, include metallic rollers. The hardness of the metal roller was 100 as a measurement limit. Examples of the metal roller include a mirror rigid roller and a metal elastic roller. The surface temperature of the roller other than the roller having a surface hardness of 10 to 99 is preferably 70 to 170 ℃, more preferably 100 to 160 ℃.
In the present invention, as long as the durometer hardness of at least 1 of the surfaces of the first roller and the second roller is in the above range, the surfaces of both the first roller and the second roller may satisfy the durometer hardness. In this case, desired fine irregularities are formed on the surface of the film.
The film that has passed between the pair of rollers 43 (the first roller 43a and the second roller 43b) is cooled while passing through the conveying roller 44 or while passing through a cooling region or a cooling roller. After cooling, the winding can be carried out again. That is, in the present invention, a wound body having a core material and the film of the present invention wound around the core material can be produced.
The film obtained by the above-mentioned method for producing a film preferably has a thickness of 10 μm or more and 300 μm or less. The details of the film obtained by the film production method of the present invention are the same as those of the present invention described above.
Further, by laminating the film of the present invention obtained as described above, the adhesive layer, the film base material, and the electrode layer, a transparent conductive film can also be produced.
Examples
The present invention will be described more specifically with reference to examples. The materials, the amounts used, the ratios, the treatment contents, the treatment order, and the like shown in the following examples may be appropriately changed without departing from the spirit of the present invention. Therefore, the scope of the present invention is not limited to the specific examples shown below.
< raw materials >
Bisphenol A polycarbonate (A)
(A1) An aromatic polycarbonate obtained by an interfacial polymerization method using bisphenol A as a starting material (E-2000F, weight average molecular weight: 52,800 Tg: 151 ℃ C., manufactured by Mitsubishi engineering plastics Co., Ltd.)
(A2) An aromatic polycarbonate obtained by an interfacial polymerization method using bisphenol A as a starting material (S-3000F, weight-average molecular weight: 41,300 Tg: 148 ℃ manufactured by Mitsubishi engineering plastics Co., Ltd.)
(A3) An aromatic polycarbonate obtained by an interfacial polymerization method using bisphenol A as a starting material (H-4000F, weight average molecular weight: 29,200 Tg: 143 ℃ manufactured by Mitsubishi engineering plastics Co., Ltd.)
(A4) An aromatic polycarbonate obtained by an interfacial polymerization method using bisphenol A as a starting material (H-7000F, manufactured by Mitsubishi engineering plastics corporation, weight-average molecular weight: 24,900 Tg: 141 ℃ C.)
A polycarbonate (B) having a Tg of 160 ℃ or higher
(B1) An aromatic polycarbonate obtained by an interfacial polymerization method using bisphenol AP as a starting material (FPC-0220, weight average molecular weight: 49,900, Tg: 184 ℃ manufactured by Mitsubishi gas chemical Co., Ltd.)
(B2) An aromatic polycarbonate obtained by an interfacial polymerization method using bisphenol AP as a starting material (FPC-0210, weight-average molecular weight: 24,800, Tg: 170 ℃ manufactured by Mitsubishi gas chemical Co., Ltd.)
(B3) An aromatic polycarbonate obtained by an interfacial polymerization method using bisphenol Z as a starting material (PCZ-200, weight average molecular weight: 32,100, Tg: 176 ℃ C., manufactured by Mitsubishi gas chemical Co., Ltd.)
Polyarylate (C)
(C1) UNITIKA, U-powder type D, weight average molecular weight of 63,000, intrinsic viscosity of 0.65dL/g Tg: 201 ℃ C.)
(C2) UNITIKA, U-powder type L, weight average molecular weight of 40,800, intrinsic viscosity of 0.48dL/g Tg: 195 deg.C)
Antioxidant (D)
(D1) Tris (2, 4-di-tert-butylphenyl) phosphite (available from phosphorus antioxidant ADEKA Co., Ltd., ADK STAB 2112)
(D2) Tetrakis [3- (3 ', 5' -di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol (hindered phenol antioxidant, ADEKA, ADK STAB AO-60)
Ester interchange inhibitor (E)
(E1) Octadecyl phosphite (AX-71, manufactured by ADEKA K.K.)
Release agent (F)
(F1) Glyceryl monostearate (RIKEMAL S-100A, manufactured by Liyan vitamin K.K.)
< method for measuring weight average molecular weight >
Specifically, the weight average molecular weights (Mw) of the bisphenol A polycarbonate (A), the polycarbonate (B) having a Tg of 160 ℃ or higher, and the polyarylate (C) were measured by gel permeation chromatography as follows.
The gel permeation chromatograph used was an LC-20AD system (manufactured by Shimadzu corporation) connected to LF-804(Shodex corporation) as a column. The column temperature was 40 ℃. The detector used was an RI detector of RID-10A (manufactured by Shimadzu corporation). As the eluent, chloroform was used, and a calibration curve was prepared using standard polystyrene manufactured by Tosoh corporation.
When the gel permeation chromatography, the column, and the detector are not easily available, the measurement can be performed using other devices having equivalent performance.
< determination of glass transition temperature (Tg) >
The glass transition temperatures (Tg) of the bisphenol A polycarbonate (A), the polycarbonate (B) and the polyarylate (C) having a Tg of 160 ℃ or higher, and the composition were measured by heating and cooling in two cycles under the following measurement conditions of DSC and measuring the glass transition temperature at the time of heating in the second cycle.
The intersection of a straight line extending from the base line on the low temperature side to the high temperature side and a tangent to the inflection point is defined as a glass transition start temperature (Tg), the intersection of a straight line extending from the base line on the high temperature side to the low temperature side and a tangent to the inflection point is defined as a glass transition end temperature (Tg), and the midpoint between the glass transition start temperature and the glass transition end temperature is defined as a glass transition temperature (Tg). The measurement start temperature was 30 ℃, the temperature increase rate was 10 ℃/min, the arrival temperature was 250 ℃, and the temperature decrease rate was 20 ℃/min.
The measurement apparatus used was a differential scanning calorimeter (DSC, manufactured by Hitachi Kagaku K.K. 'DSC 7020').
< method for measuring intrinsic viscosity >
Determination of intrinsic viscosity [ eta ] of the resin Using methylene chloride as solvent](unit dL/g). The temperature was set to 25 ℃. The concentration [ C ] of each solution was measured by Ubbelohde viscometer]Specific viscosity [ eta ] at (g/dL)sp]. The intrinsic viscosity was calculated from the obtained value and concentration of the specific viscosity by the following formula.
Examples 1 to 6 and comparative examples 1 to 8
< production of resin pellets >
The above components were measured so as to be contained in the amounts shown in table 1 or table 2 (the contents of the components are parts by mass). After that, the mixture was kneaded for 15 minutes by a tumbler, and then melt-kneaded at a cylinder temperature of 300 ℃ by a twin-screw extruder with a vent (TEX 30. alpha. manufactured by Nippon Steel works Co., Ltd.) having a screw diameter of 32mm, and pellets were obtained by a strand cutter.
< production of film >
Using the obtained pellets, a film was produced by the following method.
The pellets obtained above were extruded in a molten state under conditions of a discharge rate of 10Kg/h and a screw rotation speed of 63rpm using a T-die melt extruder constituted by a double-screw extruder with a vent having a cylinder diameter of 32mm and a screw L/D of 31.5 (manufactured by japan steel products, TEX30 α), and were pressure-bonded by a first roll and a second roll, followed by cooling and solidification to prepare a film. At a barrel and die temperature of 280 ℃.
The final film thickness was adjusted to the values shown in table 1 or table 2 by changing the roll speed of the first roll and the second roll.
Details of the first roller and the second roller used are as follows.
First roller: silicone rubber roll manufactured by Tantian commercial corporation (IT68S-MCG)
Size diameter: outer diameter 260mm x width 600mm
Durometer hardness of roll surface (type a): 70
Roll temperature: 50 deg.C
A second roller: metal rigid body roll manufactured by JSW corporation (surface: hard chrome treatment)
Mandrel diameter: outer diameter 250mm x width 600mm
Durometer hardness of roll surface (type a): the measurement limit of 100 was reached.
Roll temperature: 130 deg.C
< determination of coefficient of dynamic Friction >
The dynamic friction coefficient of the obtained film was measured using a friction coefficient measuring machine. Specifically, a bisphenol A polycarbonate film having a root mean square roughness of 0.093 μm was placed so as to overlap the obtained film, and the obtained film was slid on the polycarbonate film under conditions in which the slider speed was 100 mm/min and the load cell was 10N, to measure the coefficient of dynamic friction. The coefficient of FRICTION measuring device was manufactured by Toyo Seiki Seisaku-Shoten ("FRICTION TESTER").
A bisphenol A polycarbonate film with a single-sided masking film (FE-2000, 100 μm thick, manufactured by Mitsubishi gas chemical) was used as a bisphenol A polycarbonate film with a root-mean-square roughness of 0.093 μm. In this example, the masked surface of the bisphenol a type polycarbonate film with the single-sided masking film peeled off was set as the upper surface, the film was fixed to the right end of the test table with an adhesive tape so that the long axis thereof was aligned with the long axis of the test table, the obtained film was adhered to the lower side of a slider of 63mm × 63mm and 200g, and the obtained film was set so as to overlap with the polycarbonate film, and the obtained film was slid and the coefficient of dynamic friction was measured as described above. In the comparative example, the film could not slide and the coefficient of dynamic friction could not be measured.
< determination of root mean square roughness Rq >
The surface roughness of the bisphenol a polycarbonate film used for measuring the coefficient of dynamic friction was measured by the following method using a surface roughness measuring machine. The detector of the device is made to be integral, and the standard driving unit is mounted on the driving part of the detector. The film was fixed to a glass plate with an adhesive tape, and a surface roughness measuring device was not moved. Then, the measurement was carried out under the measurement conditions of the standard "JIS B0601-2001", the measurement speed of 0.5mm/s, the cutoff value of 0.8, and the number of intervals of 3, and the root mean square roughness Rq was measured. With respect to the root mean square roughness Rq, the site of the film was measured 3 times and the average value was taken.
"SJ-210" manufactured by Mitutoyo corporation was used as the measuring instrument.
< measurement of Total light transmittance and haze >
The total light transmittance (%) and haze (%) of the obtained film were measured using a haze meter under a condition of a D65 light source field of view of 10 °.
The haze meter used was HM-150 manufactured by color technical research institute, village.
The results are shown in tables 1 and 2 below.
[ Table 1]
[ Table 2]
Description of the symbols
10 transparent conductive film, 11 electrode layer (transparent conductive film), 12 substrate film, 13 adhesive layer, 14 protective film, 21 surface smooth polycarbonate film, 22 surface with fine concave convex polycarbonate film, 30 film, 41 composition, 42 mold, 43 pairs of rollers, 44 conveying roller.
Claims (14)
1. A composition comprising:
25 to 70 parts by mass of bisphenol A polycarbonate (A) having a weight average molecular weight of 20,000 to 35,000;
26.5 to 71.5 parts by mass of an aromatic polycarbonate (B) other than the bisphenol A polycarbonate (A), the aromatic polycarbonate (B) having a glass transition temperature of 160 ℃ or higher as measured by a differential scanning calorimeter; and
3.5 to 7.5 parts by mass of a polyarylate (C) having a weight average molecular weight of 45,000 to 80,000.
2. The composition of claim 1, wherein:
the aromatic polycarbonate (B) other than the bisphenol A polycarbonate (A) is a bisphenol AP polycarbonate.
3. The composition of claim 1 or claim 2, wherein:
the glass transition temperature of the composition is 160 ℃ or higher as measured by a differential scanning calorimeter.
4. A film, characterized by:
formed from the composition of any one of claims 1 to 3.
5. The film of claim 4, wherein:
the film has a coefficient of dynamic friction of 2.0 or less with a film having a root mean square roughness of 0.093 μm as measured at a slide speed of 100 mm/min and a load cell of 10N.
6. The film of claim 4 or 5, wherein:
the film has a thickness of 10 to 300 [ mu ] m.
7. The film of claim 4 or 5, wherein:
the haze is 10% or less.
8. A transparent conductive film characterized in that:
the film according to any one of claims 4 to 7, an adhesive layer, a film substrate and an electrode layer are provided in this order.
9. A method of making a membrane, comprising:
extruding the composition in a molten state into a sheet, and pressure-bonding the sheet with a pair of rolls, wherein the type A durometer hardness of at least 1 roll surface of the pair of rolls is 10 to 99,
the composition comprises:
25 to 70 parts by mass of bisphenol A polycarbonate (A) having a weight average molecular weight of 20,000 to 35,000;
26.5 to 71.5 parts by mass of an aromatic polycarbonate (B) other than the bisphenol A polycarbonate (A), the aromatic polycarbonate (B) having a glass transition temperature of 160 ℃ or higher as measured by a differential scanning calorimeter; and
3.5 to 7.5 parts by mass of a polyarylate (C) having a weight average molecular weight of 45,000 to 80,000.
10. The method of manufacturing a film according to claim 9, wherein:
the aromatic polycarbonate (B) other than the bisphenol A polycarbonate (A) is a bisphenol AP polycarbonate.
11. The method of manufacturing a film according to claim 9 or 10, wherein:
the glass transition temperature of the composition is 160 ℃ or higher as measured by a differential scanning calorimeter.
12. The method of manufacturing a film according to claim 9 or 10, wherein: the film has a coefficient of dynamic friction of 2.0 or less with a film having a root mean square roughness of 0.093 μm as measured at a slide speed of 100 mm/min and a load cell of 10N.
13. The method of manufacturing a film according to claim 9 or 10, wherein: the film has a thickness of 10 to 300 [ mu ] m.
14. The method of manufacturing a film according to claim 9 or 10, wherein: the film has a haze of 10% or less.
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| JP2011516680A (en) * | 2008-04-11 | 2011-05-26 | デュポン テイジン フィルムズ ユー．エス．リミテッド パートナーシップ | Plastic film with high breakdown voltage |
| CN106232718A (en) * | 2014-04-15 | 2016-12-14 | 沙特基础工业全球技术有限公司 | High heat polycarbonate compositions |
| WO2017204339A1 (en) * | 2016-05-27 | 2017-11-30 | 出光興産株式会社 | Resin composition, electrophotographic photosensitive material, and electrophotographic device |
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| JP2011516680A (en) * | 2008-04-11 | 2011-05-26 | デュポン テイジン フィルムズ ユー．エス．リミテッド パートナーシップ | Plastic film with high breakdown voltage |
| CN106232718A (en) * | 2014-04-15 | 2016-12-14 | 沙特基础工业全球技术有限公司 | High heat polycarbonate compositions |
| WO2017204339A1 (en) * | 2016-05-27 | 2017-11-30 | 出光興産株式会社 | Resin composition, electrophotographic photosensitive material, and electrophotographic device |
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