The present invention relates to a resin composition containing a 4-methyl-1-pentene copolymer and a film for a capacitor.
Background technology
[0002]
　The 4-methyl-1-pentene polymer is superior to polyethylene and polypropylene in properties such as heat resistance, transparency and electrical properties, and is widely used in various applications (see, for example, Patent Document 1). Specifically, a film for a capacitor made of a 4-methyl-1-pentene copolymer is known (see, for example, Patent Document 2).
Prior art literature
Patent documents
[0003]
Patent Document 1: International Publication No. 2013/099876
Patent Document 2: Japanese Patent Application Laid-Open No. 2014-11182
Outline of the invention
Problems to be solved by the invention
[0004]
　4-Methyl-1-pentene polymers are generally poorly stretchable and may have limited applicable applications compared to, for example, polyethylene or polypropylene, which are the same polyolefins. An object of the first aspect of the present invention is to provide a resin composition containing a 4-methyl-1-pentene copolymer capable of obtaining a molded product having excellent stretchability.
　Further, in recent years, there has been an increasing demand for capacitors to be further improved in durability at high temperature and long-term power application. An object of the second aspect of the present invention is a capacitor obtained by biaxial stretching, which has high heat resistance that can maintain quality even when used in a high temperature environment and has good dielectric loss characteristics at high temperature. To provide a film for use.
Means to solve problems
[0005]
　The present inventors have made diligent studies to solve the above problems. As a result, they have found that the problem according to the first aspect can be solved by the resin composition having the following specific composition, and that the capacitor film described below can solve the problem according to the second aspect. The invention was completed.
　The present invention relates to, for example, the following [1] to [18].
　[1] A 4-methyl-1-pentene copolymer (A) satisfying the following requirements (Aa) to (Ad), and the following requirements (Ba), (Ba1), (B-). b), (Bb1) and 4-methyl-1-pentene copolymer (B) satisfying (Bc) to (Bd) are contained, and the copolymers (A) and (B) are contained. ) Is 100 parts by mass, the content of the copolymer (A) is 10 to 95 parts by mass, and the content of the copolymer (B) is 90 to 5 parts by mass. Is a resin composition.
(Aa) The amount (U1) of the structural unit derived from 4-methyl-1-pentene is 80.0 to 99.9 mol%, and is selected from linear α-olefins having 2 to 20 carbon atoms. The total amount (U2) of the constituent units derived from at least one type is 20.0 to 0.1 mol% (provided that the total of the U1 and the U2 is 100 mol%).
( Ab ) The ultimate viscosity [η] A measured in decalin at 135 ° C. is 0.5 to 5.0 dL / g.
(Ac) When the copolymer (A) is measured by a cross-separation chromatograph device (CFC) using an infrared spectrophotometer as a detection unit, the amount of eluted components peaks in the range of 100 to 140 ° C. There is at least one.
(Ad) The ratio of the weight average molecular weight (Mw) to the number average molecular weight (Mn) in the elution component in the range of 100 to 140 ° C. when the copolymer (A) is measured by the CFC. The molecular weight distribution (Mw / Mn) is 1.0 to 3.5.
The amount (U3) of the structural unit derived from (BA) 4-methyl-1-pentene is 20.0 to 98.0 mol%, and is selected from linear α-olefins having 2 to 20 carbon atoms. The total amount (U4) of the constituent units derived from at least one type is 80.0 to 2.0 mol% (provided that the total of the U3 and the U4 is 100 mol%).
(BA1) The ratio (U4 / U2) of U2 (mol%) described in the requirement (Aa) to U4 (mol%) described in the requirement (BA) is 1.0. Exceeded and less than 50.0.
( Bb ) The ultimate viscosity [η] B measured in decalin at 135 ° C. is 2.0 to 8.0 dL / g.
[Eta] according to (B-b1) the requirement (A-b) A and, [eta] according to the requirements (B-b) B ratio of ([eta] B / [eta] A ) is , More than 1.0 and less than 6.0.
(BC) When the copolymer (B) is measured by a cross-separation chromatograph device (CFC) using an infrared spectrophotometer in the detection unit, the amount of eluted components is in the range of 0 ° C. or higher and lower than 100 ° C. There is at least one peak of.
(Bd) The ratio of the weight average molecular weight (Mw) to the number average molecular weight (Mn) of the eluted components in the range of 0 ° C. or higher and lower than 100 ° C. when the copolymer (B) is measured by the CFC. The molecular weight distribution (Mw / Mn) is 1.0 to 7.0.
　[2] The resin composition according to the above [1], wherein the linear α-olefins in the copolymers (A) and (B) are independently linear α-olefins having 5 to 20 carbon atoms. thing.
　[3] The linear α-olefins in the copolymers (A) and (B) are independently derived from 1-hexene, 1-octene, 1-decene, 1-tetradecene, 1-hexadecene and 1-octadecene, respectively. The resin composition according to the above [1] or [2], which is at least one selected.
　[4] When the total content of the copolymers (A) and (B) is 100 parts by mass, the content of the copolymer (A) is 15 to 90 parts by mass, and the copolymer weight. The resin composition according to any one of [1] to [3] above, wherein the content of the coalescence (B) is 85 to 10 parts by mass.
　[5] When measured by a cross fractionation chromatograph (CFC) using an infrared spectrophotometer in the detection unit, the amount of eluted components in the range of 135 ° C or higher is the total amount of eluted components of the resin composition at 0 to 145 ° C. The resin composition according to any one of the above [1] to [4], which is 20% by mass or less based on the amount of the resin composition.
　[6] A molded product containing the resin composition according to any one of the above [1] to [5].
　[7] A film containing the resin composition according to any one of the above [1] to [5].
　[8] The film according to the above [7], which is a film for a capacitor.
　[9] A film for a capacitor obtained by biaxially stretching a film containing a 4-methyl-1-pentene copolymer (C) that satisfies the following requirements (Ca) to (Cd).
(CA) The amount (U5) of the structural unit derived from 4-methyl-1-pentene is 20.0 to 98.0 mol%, and the number of carbon atoms other than 4-methyl-1-pentene is 5 to 20. The amount (U6) of the structural unit derived from the α-olefin is 80.0 to 2.0 mol%.
(C-b) The ultimate viscosity [η] C measured in decalin at 135 ° C. is 1.5 to 8.0 dL / g.
(C) When the copolymer (C) is measured by a cross-separation chromatograph device (CFC) using an infrared spectrophotometer in the detection unit, the amount of eluted components is in the range of 0 ° C. or higher and lower than 100 ° C. There is at least one peak of.
(Cd) The ratio of the weight average molecular weight (Mw) to the number average molecular weight (Mn) of the eluted components in the range of 0 ° C. or higher and lower than 100 ° C. when the copolymer (C) is measured by the CFC. The molecular weight distribution (Mw / Mn) is 1.0 to 7.0.
　[10] 90 to 5 parts by mass of the 4-methyl-1-pentene copolymer (C) satisfying the following requirements (Ca) to (Cd) and the following requirements (Da) to (Dd). ) And (D-a1) are satisfied with 10 to 95 parts by mass of the 4-methyl-1-pentene copolymer (D) (however, the total of the copolymer (C) and the copolymer (D) is 100 parts by mass. A film for a capacitor obtained by biaxially stretching a film composed of the composition (X) containing).
(CA) The amount (U5) of the structural unit derived from 4-methyl-1-pentene is 20.0 to 98.0 mol%, and the number of carbon atoms other than 4-methyl-1-pentene is 5 to 20. The amount (U6) of the structural unit derived from α-olefin is 80.0 to 2.0 mol%.
(C-b) The ultimate viscosity [η] C measured in decalin at 135 ° C. is 1.5 to 8.0 dL / g.
(C) When the copolymer (C) is measured by a cross-separation chromatograph device (CFC) using an infrared spectrophotometer in the detection unit, the amount of eluted components is in the range of 0 ° C. or higher and lower than 100 ° C. There is at least one peak of.
(Cd) The ratio of the weight average molecular weight (Mw) to the number average molecular weight (Mn) of the eluted components in the range of 0 ° C. or higher and lower than 100 ° C. when the copolymer (C) is measured by the CFC. The molecular weight distribution (Mw / Mn) is 1.0 to 7.0.
(Da) The amount (U7) of the structural unit derived from 4-methyl-1-pentene is 80.0 to 99.9 mol%, and the number of carbon atoms other than 4-methyl-1-pentene is 2 to 20. The amount (U8) of the structural unit derived from α-olefin is 20.0 to 0.1 mol%.
( Db ) The ultimate viscosity [η] D measured in decalin at 135 ° C. is 0.5 to 5.0 dL / g.
(Dc) When the copolymer (D) is measured by a cross-separation chromatograph device (CFC) using an infrared spectrophotometer in the detection unit, the amount of eluted components is in the range of 100 ° C. or higher and lower than 140 ° C. There is at least one peak of.
(Dd) The ratio of the weight average molecular weight (Mw) to the number average molecular weight (Mn) of the eluted components in the range of 100 ° C. or higher and lower than 140 ° C. when the copolymer (D) is measured by the CFC. The molecular weight distribution (Mw / Mn) is 1.0 to 3.5.
(D-a1) The ratio (U6 / U8) of U6 (mol%) described in the requirement (CA) to U8 (mol%) described in the requirement (Da) is 1.0. Exceeded and less than 50.0.
　[11] The film for a capacitor according to the above [10], wherein the α-olefin in the copolymer (D) is an α-olefin having 5 to 20 carbon atoms other than 4-methyl-1-pentene.
　[12] The film for a capacitor according to the above [10], wherein the α-olefins in the copolymers (C) and (D) are independently α-olefins having 10 to 20 carbon atoms.
　[13] The ratio V (150 ° C.) / V (23 ° C.) of the dielectric breakdown strength V (23 ° C.) at 23 ° C. to the dielectric breakdown strength V (150 ° C.) at 150 ° C. is 0.50 or more. The capacitor film according to any one of [9] to [12].
　[14] The dielectric loss tangent tan δ (23 ° C.) at 23 ° C. is 400 × 10 -5 or less, the dielectric loss tangent tan δ (150 ° C.) at 150 ° C. is 50 × 10 -5 or less, and tan δ (23 ° C.) and tan δ. The film for a capacitor according to any one of [9] to [13] above, wherein the ratio tan δ (150 ° C.) / tan δ (23 ° C.) to (150 ° C.) is 0.10 or less.
　[15] The film for a capacitor according to any one of [9] to [14] above, wherein the draw ratio is 1.1 to 100 times in terms of area.
　[16] The film for a capacitor according to any one of the above [9] to [15], which has a thickness of 1 to 20 μm.
　[17] A metallized film having the capacitor film according to any one of [9] to [16] and a metal film provided on at least one side of the film.
　[18] A film capacitor having the metallized film according to the above [17].
The invention's effect
[0006]
　According to the first aspect of the present invention, it is possible to provide a resin composition containing a 4-methyl-1-pentene copolymer capable of obtaining a molded product having excellent stretchability.
　According to the second aspect of the present invention, the film obtained by biaxial stretching has high heat resistance capable of maintaining quality even when used in a high temperature environment, and has good dielectric loss characteristics at high temperatures. A film for a capacitor can be provided.
Mode for carrying out the invention
[0007]
　Hereinafter, modes for carrying out the present invention will be described.
　In the present specification, the numerical range n1 to n2 means a numerical range of n1 or more and n2 or less when n1 n2.
　As used herein, the term "capacitor" is used interchangeably with a capacitor.
[0008]
　Various physical properties will be described in the following description, and details of the measurement conditions for the various physical properties will be described in the Example column.
　 [Resin Composition]
　Hereinafter, the first aspect of the present invention will be described.
　The resin composition of the present embodiment contains a 4-methyl-1-pentene copolymer (A) and a 4-methyl-1-pentene copolymer (B), which will be described below.
[0009]
　 <4-Methyl-1-pentene copolymer (A)>
　4-Methyl-1-pentene copolymer (A) (hereinafter, also referred to as "copolymer (A)") is 4-methyl-1-pentene. It has a structural unit derived from, and a structural unit derived from a linear α-olefin having 2 to 20 carbon atoms, and satisfies the following requirements (Aa) to (Ad). It is preferable that the copolymer (A) further satisfies the following requirements (A-e).
[0010]
　 << Requirements (AA) >> In the
　copolymer (A), the amount (U1) of the structural unit derived from 4-methyl-1-pentene is 80.0 to 99.9 mol%, and the number of carbon atoms is 2 to 2. The total amount (U2) of the building blocks derived from at least one selected from the 20 linear α-olefins is 20.0 to 0.1 mol%. U1 is preferably 85.0 to 99.9 mol%, more preferably 90.0 to 99.9 mol%. U2 is preferably 15.0 to 0.1 mol%, more preferably 10.0 to 0.1 mol%. However, the total of the U1 and the U2 is 100 mol%. The 100 mol% means the total of the U1 and the U2, and does not mean 100 mol% of all the constituent units constituting the copolymer (A).
[0011]
　Examples of the linear α-olefin having 2 to 20 carbon atoms include ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1 -Hexadecene, 1-heptadecene, 1-octadecene, 1-eikosen can be mentioned. In the present specification, ethylene is included in α-olefin. Among these, a linear α-olefin having 5 to 20 carbon atoms can be obtained from the viewpoint that the molded product obtained from the resin composition of the present embodiment can be stretched more highly and can maintain high transparency even after stretching. Is preferable, a linear α-olefin having 6 to 20 carbon atoms is more preferable, and a linear α-olefin having 10 to 20 carbon atoms is further preferable. Specifically, 1-hexene, 1-octene, 1-decene, 1-tetradecene, 1-hexadecene and 1-octadecene are preferable, and 1-decene, 1-tetradecene, 1-hexadecene and 1-octadecene are particularly preferable.
[0012]
　The copolymer (A) may have only one type of structural unit derived from a linear α-olefin having 2 to 20 carbon atoms, or may have two or more types.
　The copolymer (A) is a structural unit derived from a polymerizable compound other than 4-methyl-1-pentene and a linear α-olefin having 2 to 20 carbon atoms, as long as the object of the present invention is not impaired. Can further have. Examples of other polymerizable compounds include branched α-olefins having 20 or less carbon atoms other than 4-methyl-1-pentene; vinyl compounds having a cyclic structure such as styrene, vinylcyclopentene, vinylcyclohexane, and vinylnorbornene; acetic acid. Vinyl esters such as vinyl; unsaturated organic acids such as maleic anhydride or derivatives thereof; conjugated diene such as butadiene, isoprene, pentadiene, 2,3-dimethylbutadiene; 1,4-hexadiene, 1,6-octadien, 2- Methyl-1,5-hexadiene, 6-methyl-1,5-heptadiene, 7-methyl-1,6-octadene, dicyclopentadiene, cyclohexadiene, dicyclooctadiene, methylenenorbornene, 5-vinylnorbornene, 5- Echiliden-2-norbornene, 5-methylene-2-norbornene, 5-isopropylidene-2-norbornene, 6-chloromethyl-5-isopropenl-2-norbornene, 2,3-diisopropylidene-5-norbornene, 2- Examples thereof include non-conjugated polyenes such as etylidene-3-isopropylidene-5-norbornene and 2-propenyl-2,2-norbornene.
[0013]
　In the copolymer (A), the content ratio of the structural unit derived from the other polymerizable compound is usually 10 mol% or less, preferably 5 mol%, out of 100 mol% of all the structural units constituting the (A). Hereinafter, it is more preferably 3 mol% or less.
[0014]
　When the copolymer (A) contains two or more copolymers, the amount (U1) of the structural unit derived from 4-methyl-1-pentene in the requirement (Aa) and the direct number of carbon atoms 2 to 20 The total amount (U2) of the constituent units derived from the chain α-olefin can be the average value of each copolymer in consideration of the mass ratio. For example, 30% by mass of the copolymer derived from 4-methyl-1-pentene is 80 mol%, and 90 mol% is the amount of the constituent unit derived from 4-methyl-1-pentene. In the case of the copolymer (A) consisting of 70% by mass of the polymer, it can be calculated as U1 = 80 × 0.30 + 90 × 0.70 = 87 (mol%). Each copolymer has a structural unit amount derived from 4-methyl-1-pentene in the numerical range of U1 and U2 and a structural unit amount derived from a linear α-olefin having 2 to 20 carbon atoms. Is preferable.
[0015]
　 << Requirements ( Ab) >> The
　ultimate viscosity [η] A of the copolymer (A) measured in decalin at 135 ° C. is 0.5 to 5.0 dL / g. The [η] A is preferably 0.5 to 4.5 dL / g, more preferably 0.5 to 4.0 dL / g.
[0016]
　The copolymer (A) in which [η] A is in the above range exhibits good fluidity during preparation and molding of the resin composition, and is further combined with the 4-methyl-1-pentene copolymer (B). In this case, it is considered that it contributes to the improvement of stretchability.
[0017]
　When the copolymer (A) contains two or more kinds of copolymers, the ultimate viscosity [η] A can be an average value of [η] of each copolymer in consideration of the mass ratio. It is preferable that each copolymer has [η] in the numerical range of [η] A.
[0018]
　 << Requirements (Ac) >> When the
　copolymer (A) is measured by a cross fractionation chromatograph device (CFC) using an infrared spectrophotometer in the detection unit, the amount of eluted components is in the range of 100 to 140 ° C. There is at least one peak of. The peak of the amount of the eluted component preferably exists in the range of 100 to 135 ° C. The position of the peak of the amount of the eluted component is determined by the position of the peak top.
[0019]
　In one embodiment, the copolymer (A) preferably has no peak in the amount of eluted components in the range of 0 ° C. or higher and lower than 100 ° C.
　The copolymer (A) satisfying the requirement (Ac) contains a component having high crystallinity, and the obtained molded product tends to exhibit high heat resistance.
[0020]
　The content ratio of the eluted component at 135 ° C. or higher in the total amount of the eluted component at 0 to 145 ° C. of the copolymer (A) is preferably 30% by mass or less, more preferably 25% by mass or less, still more preferably 20% by mass. It is as follows. The copolymer (A) satisfying this requirement is preferable from the viewpoint of uniform stretchability.
[0021]
　 << Requirements (Ad) >> When the
　copolymer (A) is measured by a cross fractionation chromatograph device (CFC) using an infrared spectrophotometer in the detection unit, the elution component in the range of 100 to 140 ° C. The molecular weight distribution (Mw / Mn), which is the ratio of the weight average molecular weight (Mw) to the number average molecular weight (Mn), is 1.0 to 3.5. The Mw / Mn is preferably 1.0 to 3.0, more preferably 1.5 to 2.5. Each of the average molecular weights is measured by a gel permeation chromatography (GPC) method and is a polystyrene-equivalent value.
[0022]
　The resin composition containing the copolymer (A) having Mw / Mn in the above range tends to have a low content of relatively low molecular weight components, and the transparency of the molded product due to bleeding out of the low molecular weight components It is preferable from the viewpoint that the decrease and the possibility that the low molecular weight component weakens the crystal structure are reduced, which is considered to have a favorable effect on the mechanical properties of the molded product.
　The copolymer (A) having Mw / Mn in the above range can be obtained, for example, by using a metallocene catalyst described later.
[0023]
　 << Requirements (A) >> The
　copolymer (A) has a melting point (Tm) measured by a differential scanning calorimeter (DSC), preferably 210 to 260 ° C., more preferably 220 to 260 ° C., and even more preferably. It is 225 to 260 ° C.
　The melting point tends to depend on the stereoregularity of the copolymer and the content of structural units derived from the linear α-olefin having 2 to 20 carbon atoms. The melting point can be adjusted by using a metallocene catalyst described later and by controlling the content ratio of the structural unit.
　The copolymer (A) having a melting point in the above range is preferable from the viewpoint of heat resistance and moldability.
[0024]
　 <4-Methyl-1-pentene copolymer (B)>
　4-Methyl-1-pentene copolymer (B) (hereinafter, also referred to as "copolymer (B)") is 4-methyl-1-pentene. It has a structural unit derived from, and a structural unit derived from a linear α-olefin having 2 to 20 carbon atoms, and has the following requirements (BA), (B-a1), (B-b), (. Bb1) and (Bc) to (Bd) are satisfied. It is preferable that the copolymer (B) further satisfies the following requirement (B). It is preferable that the copolymer (B) further satisfies the following requirement (BF).
[0025]
　 << Requirements (BA) >> In the
　copolymer (B), the amount (U3) of the structural unit derived from 4-methyl-1-pentene is 20.0 to 98.0 mol%, and the number of carbon atoms is 2 to 2. The total amount (U4) of the building blocks derived from at least one selected from the 20 linear α-olefins is 80.0 to 2.0 mol%. U3 is preferably 20.0 to 97.0 mol%, more preferably 25.0 to 97.0 mol%. U4 is preferably 80.0 to 3.0 mol%, more preferably 75.0 to 3.0 mol%. However, the total of the U3 and the U4 is 100 mol%. The 100 mol% means the total of the U3 and the U4, and does not mean 100 mol% of all the constituent units constituting the copolymer (B).
[0026]
　Examples of the linear α-olefin having 2 to 20 carbon atoms include ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1 -Hexadecene, 1-heptadecene, 1-octadecene, 1-eikosen can be mentioned. Among these, a linear α-olefin having 5 to 20 carbon atoms can be obtained from the viewpoint that the molded product obtained from the resin composition of the present embodiment can be stretched more highly and can maintain high transparency even after stretching. Is preferable, a linear α-olefin having 6 to 20 carbon atoms is more preferable, and a linear α-olefin having 10 to 20 carbon atoms is further preferable. Specifically, 1-hexene, 1-octene, 1-decene, 1-tetradecene, 1-hexadecene and 1-octadecene are preferable, and 1-decene, 1-tetradecene, 1-hexadecene and 1-octadecene are particularly preferable.
[0027]
　The copolymer (B) may have only one type of structural unit derived from a linear α-olefin having 2 to 20 carbon atoms, or may have two or more types.
　The copolymer (B) can further have a structural unit derived from the other polymerizable compounds described above in the copolymer (A) as long as the object of the present invention is not impaired.
[0028]
　In the copolymer (B), the content ratio of the structural unit derived from the other polymerizable compound is usually 10 mol% or less, preferably 5 mol%, out of 100 mol% of all the structural units constituting the (B). Hereinafter, it is more preferably 3 mol% or less.
[0029]
　When the copolymer (B) contains two or more copolymers, the amount (U3) of the structural unit derived from 4-methyl-1-pentene in the requirement (BA) and the direct number of carbon atoms 2 to 20 The total amount (U4) of the constituent units derived from the chain α-olefin can be the average value of each copolymer in consideration of the mass ratio. Each copolymer has a structural unit amount derived from 4-methyl-1-pentene in the numerical range of U3 and U4 and a structural unit amount derived from a linear α-olefin having 2 to 20 carbon atoms. Is preferable.
[0030]
　In one embodiment, the copolymer (B) has a total amount of constituent units derived from at least one selected from linear α-olefins having 2 to 20 carbon atoms of 7.0 mol% or more and 80.0 mol%. The total amount of the following copolymer (B1) and the structural unit derived from at least one selected from the linear α-olefin having 2 to 20 carbon atoms is 2.0 mol% or more and less than 7.0 mol%. It can contain a polymer (B2). However, in each of the copolymers (B1) and (B2), from at least one selected from the amount of the structural unit derived from 4-methyl-1-pentene and the linear α-olefin having 2 to 20 carbon atoms. The total with the total amount of the derived constituent units is 100 mol%.
[0031]
　 << Requirement (BA1) >>
　The ratio (U4 / U2) of U2 (mol%) described in the requirement (Aa) to U4 (mol%) described in the requirement (BA) is It is more than 1.0 and less than 50.0. The ratio (U4 / U2) is preferably 2.0 to 40.0, more preferably 3.0 to 35.0.
[0032]
　U2 is a structural unit derived from at least one selected from linear α-olefins having 2 to 20 carbon atoms when the total of U1 and U2 described in (A) above is 100 mol%. The total amount (mol%). U4 is a structural unit derived from at least one selected from linear α-olefins having 2 to 20 carbon atoms when the total of U3 and U4 described in (BA) above is 100 mol%. The total amount (mol%).
[0033]
　The requirement (B-a1) is that the copolymer (B) is a structural unit derived from the linear α-olefin, which is a comonomer for 4-methyl-1-pentene, than the copolymer (A). It means that the content ratio of is high. By using the copolymers (B) and (A) that satisfy the requirement (B-a1), the effect of improving the stretchability tends to be obtained.
[0034]
　 << Requirements ( Bb) >> The
　ultimate viscosity [η] B of the copolymer (B) measured in decalin at 135 ° C. is 2.0 to 8.0 dL / g. The [η] B is preferably 2.5 to 7.5 dL / g, more preferably 2.7 to 7.0 dL / g, still more preferably 3.0 to 7.0 dL / g, and particularly preferably 3.0 to 7.0 dL / g. It is 3.5 to 7.0 dL / g. In one embodiment, the [η] B is preferably 2.0 to 7.0 dl / g, more preferably 2.5 to 6.5 dl / g.
[0035]
　The copolymer (B) in which [η] B is in the above range exhibits good fluidity during preparation and molding of the resin composition, and is further combined with the 4-methyl-1-pentene copolymer (A). In this case, it is considered that it contributes to the improvement of stretchability. In particular, when [η] B is at least the above lower limit value, the stretchability of the film tends to be superior, and the rigidity tends to be excellent.
[0036]
　When the copolymer (B) contains two or more kinds of copolymers, the ultimate viscosity [η] B can be an average value of [η] of each copolymer in consideration of the mass ratio. It is preferable that each copolymer has [η] in the numerical range of [η] B.
[0037]
　 << Requirement (B-b1) >> The ratio
　of [η] A described in the requirement (A-b) to [η] B described in the requirement (B-b) ([η] B / [η]] A ) is more than 1.0 and 6.0 or less. The ratio ([η] B / [η] A ) is preferably more than 1.0 and 5.0 or less, more preferably 1.1 to 4.0.
[0038]
　 << Requirements (BC) >> When the
　copolymer (B) is measured by a cross-separation chromatograph device (CFC) using an infrared spectrophotometer in the detection unit, it elutes in the range of 0 ° C. or higher and lower than 100 ° C. There is at least one peak in the amount of components. The peak of the amount of the eluted component preferably exists in the range of 0 to 80 ° C. The position of the peak of the amount of the eluted component is determined by the position of the peak top.
[0039]
　In one embodiment, the copolymer (B) preferably has no peak in the amount of eluted components in the range of 100 to 140 ° C.
　The copolymer (B) satisfying the requirement (BC) contains a component having lower crystallinity than the copolymer (A), and the obtained molded product tends to exhibit high flexibility.
[0040]
　 << Requirements (Bd) >> When the
　copolymer (B) is measured by a cross fractionation chromatograph device (CFC) using an infrared spectrophotometer in the detection unit, elution in the range of 0 ° C. or higher and lower than 100 ° C. The molecular weight distribution (Mw / Mn), which is the ratio of the weight average molecular weight (Mw) to the number average molecular weight (Mn), of the components is 1.0 to 7.0. The Mw / Mn is preferably 1.0 to 6.5, more preferably 1.2 to 6.0. Each of the average molecular weights is measured by a gel permeation chromatography (GPC) method and is a polystyrene-equivalent value.
[0041]
　The resin composition containing the copolymer (B) having Mw / Mn in the above range tends to have a low content of relatively low molecular weight components, and the transparency of the molded product due to bleeding out of the low molecular weight components It is preferable from the viewpoint that the decrease and the possibility that the low molecular weight component weakens the crystal structure are reduced, which is considered to have a favorable effect on the mechanical properties of the molded product.
　The copolymer (B) having Mw / Mn in the above range can be obtained, for example, by using a metallocene catalyst described later.
[0042]
　 << Requirements (B) >> When the
　copolymer (B) is measured by a cross-separation chromatograph device (CFC) using an infrared spectrophotometer in the detection unit, in one embodiment, the elution component at 0 ° C. The number average molecular weight (Mn) of the above is 5000 or more, or there is no elution component at 0 ° C.
[0043]
　The copolymer (B) containing an elution component at 0 ° C. in the CFC contains a component having very low crystallinity (or completely amorphous). The copolymer (B) in which the Mn of the elution component at 0 ° C. is 5000 or more is usually a high comonomer-containing material having very low crystallinity. Such a polymer has low crystallinity but a high molecular weight, and is preferable from the viewpoint that it is considered that the transparency of the molded product is lowered due to the bleed-out of the low molecular weight component and roll stain during film molding is unlikely to occur. Copolymers polymerized using a metallocene catalyst tend to have a large Mn of the elution component at 0 ° C. or no elution component at 0 ° C.
[0044]
　In the copolymer (B), the Mn of the elution component at 0 ° C. is preferably 15,000 or more, more preferably 20,000 or more. The upper limit of Mn is not particularly limited, but may be, for example, 1 million. The content ratio of the eluted component at 0 ° C. in the total amount of the eluted component at 0 to 145 ° C. of the copolymer (B) is 10% by mass or less or 20% by mass or less in one embodiment.
[0045]
　 << Requirement (BF) >> In the
　copolymer (B), the melting point (Tm) measured by a differential scanning calorimeter (DSC) is preferably 220 ° C. or lower, or the peak indicating the melting point in the DSC measurement is It does not appear, more preferably the melting point (Tm) is 210 ° C. or lower, or the peak indicating the melting point does not appear in the DSC measurement, and more preferably the melting point (Tm) is 100 to 200 ° C., or DSC. No peak indicating the melting point appears in the measurement.
　The copolymer (B) satisfying the requirement (BF) is preferable from the viewpoint of stretchability.
[0046]
　
　The content of the copolymer (A) in the resin composition of the present embodiment is 10 to 95 parts by mass, preferably 15 to 90 parts by mass, more preferably. Is 20 to 85 parts by mass; the content of the copolymer (B) is 90 to 5 parts by mass, preferably 85 to 10 parts by mass, and more preferably 80 to 15 parts by mass. However, the total content of the copolymers (A) and (B) is 100 parts by mass.
[0047]
　It is considered that the copolymers (A) and (B) have good compatibility. Due to the good compatibility, the obtained molded product tends to have excellent transparency. Further, due to the good compatibility, the obtained molded product tends to have a good balance between rigidity and extensibility.
[0048]
　The total content of the copolymers (A) and (B) in the resin composition of the present embodiment is usually 50% by mass or more, preferably 60% by mass or more, and more preferably 70% by mass or more. .. The upper limit of the content ratios of the copolymers (A) and (B) can be 100% by mass of the resin composition. When the resin composition contains other components (for example, other polymer components and additives described later), the upper limit is defined by the content ratio of the other components.
[0049]
　The resin composition of the present embodiment may contain one or more copolymers (A). Moreover, the resin composition of this embodiment can contain one kind or two or more kinds of copolymers (B).
[0050]
　The copolymer (A) is a hard component having a relatively low ultimate viscosity [η] with respect to the copolymer (B). Since the resin composition of the present embodiment contains these copolymers (A) and (B), the molded product obtained from the resin composition is derived from the 4-methyl-1-pentene copolymer. Excellent stretchability while maintaining transparency and heat resistance. Therefore, the resin composition of the present embodiment is suitable for producing a film for a capacitor, which is required to have heat resistance and stretchability.
[0051]
　 The
　copolymers (A) and (B) are, for example, 4-methyl-1-pentene and linear α having 2 to 20 carbon atoms, respectively. -It can be obtained by polymerizing an olefin with the other polymerizable compound, if necessary. By carrying out the polymerization in the presence of a metallocene catalyst, the copolymers (A) and (B) satisfying the above-mentioned requirements can be preferably obtained.
[0052]
　Examples of the metallocene catalyst include International Publication No. 01/53369, International Publication No. 01/27124, Japanese Patent Application Laid-Open No. 3-193996, Japanese Patent Application Laid-Open No. 02-41303, International Publication No. 06/025540 or International Publication No. The metallocene catalyst described in 2013/099876 can be mentioned.
　Examples of the metallocene catalyst include
　a catalyst composed of at least a metallocene compound (a) and a
　carrier (b)
.
[0053]
　 << Metallocene compound (a) >> The
　metallocene compound (a) is represented by, for example, the general formula (1) or (2).
[0054]
[Chemical

　formula 1] The meaning of each symbol in the general formula (1) or (2) is as follows.
[0055]
　R 1 to R 14 are independently hydrogen atoms, hydrocarbon groups, substituted hydrocarbon groups or silicon-containing groups, respectively. Adjacent substituents from R 1 to R 4 may combine with each other to form a ring. Adjacent substituents from R 5 to R 12 may combine with each other to form a ring.
[0056]
　Y is a carbon atom or a silicon atom.
　A is a divalent hydrocarbon group having 2 to 20 carbon atoms which may contain an unsaturated bond and / or an aromatic ring. A may include two or more ring structures, including a ring formed with Y.
[0057]
　M is a metal (transition metal) selected from Group 4 of the periodic table, and examples thereof include titanium, zirconium, and hafnium.
　Q is a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms, an anionic ligand, or a neutral ligand that can be coordinated with a lone electron pair. When j is 2 or more, each Q may be the same or different.
[0058]
　j is an integer of 1 to 4, preferably 2. Examples of the hydrocarbon group in
　R 1 to R 14 include a hydrocarbon group having 1 to 20 carbon atoms, and specifically, an alkyl group having 1 to 20 carbon atoms and a cycloalkyl group having 3 to 20 carbon atoms. , An arylalkyl group having 7 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, and an alkylaryl group having 7 to 20 carbon atoms can be mentioned.
[0059]
　In the substituted hydrocarbon groups (excluding silicon-containing groups) in R 1 to R 14 , some or all of the hydrogen atoms contained in the hydrocarbon groups are halogen atoms (fluorine, chlorine, bromine, iodine) and hydroxyl groups. And a group substituted with a functional group such as an amino group.
[0060]
Examples of the silicon-containing group in 　R 1 to R 14 include an alkylsilyl group or an arylsilyl group having 1 to 4 silicon atoms and 3 to 20 carbon atoms, and specific examples thereof include trimethylsilyl and tert-butyl. Examples thereof include dimethylsilyl and triphenylsilyl.
[0061]
Adjacent substituents 　R 5 to R 12 on the fluorene ring may combine with each other to form a ring. Examples of such substituted fluorenyl groups include benzofluorenyl, dibenzofluorenyl, octahydrodibenzofluorenyl, octamethyloctahydrodibenzofluorenyl.
[0062]
　R on the fluorene ring 5 R from 12 substituents are symmetrical ease of synthesis, i.e. R 5 = R 12 , R 6 = R 11 , R 7 = R 10 , R 8 = R 9 it is Is preferable. The fluorene ring moiety is preferably unsubstituted fluorene, 3,6-disubstituted fluorene, 2,7-disubstituted fluorene or 2,3,6,7-4-substituted fluorene. The 3rd, 6th, 2nd, and 7th positions on the fluorene ring correspond to R 7 , R 10 , R 6 , and R 11 , respectively.
[0063]
It is preferable that 　R 13 and R 14 are independently hydrogen atoms, hydrocarbon groups or substituted hydrocarbon groups, respectively.
　In the case of the general formula (1), R 13 and R 14 are bonded to Y to form a substituted methylene group or a substituted silylene group as a crosslinked portion. Specific examples of the substituted methylene group and the substituted silylene group include, for example, dialkylmethylene, dicycloalkylmethylene, alkylcycloalkylmethylene, alkylarylmethylene, diarylmethylene, dialkylsilylene, dicycloalkylsilylene, alkylcycloalkylsilylene, and alkylaryl. Examples thereof include silylene, diallyl silylene, and groups obtained by halogenating these.
[0064]
　In the case of the general formula (2), Y is bonded to the divalent hydrocarbon group A to form a cycloalkylidene group, a cyclomethylenecilylene group, or the like. Specific examples of the cycloalkylidene group and the cyclomethylenecilylene group include, for example, cyclopropylidene, cyclobutylidene, cyclopentylidene, cyclohexylidene, cycloheptilidene, bicyclo [3.3.1] nonylidene, norbornylidene, and adaman. Examples thereof include chiliden, tetrahydronaphthylidene, dihydroindanylidene, cyclodimethylene silylene, cyclotrimethylene silylene, cyclotetramethylene silylene, cyclopentamethylene silylene, cyclohexamethylene silylene and cycloheptamethylene silylene.
[0065]
　In Q, the halogen atom includes fluorine, chlorine, bromine and iodine; the hydrocarbon group having 1 to 20 carbon atoms includes the same group as the hydrocarbon group having R 1 to R 14 ; an anion arrangement. Examples of the position include an alkoxy group, an aryloxy group, a carboxylate group, a sulfonate group and the like; and examples of a neutral ligand capable of coordinating with an isolated electron pair include trimethylphosphine, triethylphosphine, triphenylphosphine and diphenylmethyl. Examples thereof include organic phosphorus compounds such as phosphine, ethers such as tetrahydrofuran, diethyl ether, dioxane and 1,2-dimethoxyethane. At least one of Q is preferably a halogen atom or an alkyl group having 1 to 20 carbon atoms.
[0066]
　Specific examples of the metallocene compound (a) include the compounds exemplified in International Publication No. 01/27124, International Publication No. 2006/025540 or International Publication No. 2007/308607.
[0067]
　As the metallocene compound (a), the compound represented by the general formula [A2] described in International Publication No. 2014-050817 and the like is particularly preferable.
[0068]
[Chemical

　formula 2] In the formula [A2], R 1b is a hydrocarbon group, a silicon-containing group or a halogen-containing hydrocarbon group, and R 2b to R 12b are a hydrogen atom, a hydrocarbon group, a silicon-containing group, a halogen atom and a halogen. It may be selected from the contained hydrocarbon groups and may be the same or different from each other, and the respective substituents may be bonded to each other to form a ring. M is a Group 4 transition metal of the periodic table, n is an integer of 1 to 3, Q is synonymous with Q in the general formula (1) or (2), and j is an integer of 1 to 4. be.
[0069]
Examples of the hydrocarbon group in 　R 1b to R 12b include a linear hydrocarbon group such as a linear alkyl group and a linear alkenyl group; a branched hydrocarbon group such as a branched alkyl group; and a cycloalkyl group. Cyclic saturated hydrocarbon groups such as norbornyl group and adamantyl group; cyclic unsaturated hydrocarbon groups such as aryl group and cycloalkenyl group; cyclic unsaturated hydrocarbons having one or more hydrogen atoms of saturated hydrocarbon groups such as aralkyl group. Examples thereof include groups formed by substituting a hydrocarbon group. The hydrocarbon group usually has 1 to 20, preferably 1 to 15, and more preferably 1 to 10.
[0070]
Examples of the silicon-containing group in 　R 1b to R 12b include a group represented by the formula −SiR 3 (in the formula, each of the plurality of Rs is an alkyl group or a phenyl group having 1 to 15 carbon atoms independently). Can be mentioned.
[0071]
Examples of the halogen-containing hydrocarbon group in 　R 1b to R 12b include a group formed by substituting one or more hydrogen atoms of the above-mentioned hydrogen atom with a halogen atom, such as a trifluoromethyl group.
[0072]
Examples of the halogen atom in 　R 2b to R 12b include a fluorine atom, a chlorine atom, a bromine atom and an iodine atom.
　Examples of the ring (spiro ring, additional ring) formed by bonding two substituents to each other in the formula [A2] include an alicyclic ring and an aromatic ring. Specific examples thereof include a cyclohexane ring, a benzene ring, a hydrogenated benzene ring and a cyclopentene ring, and preferably a cyclohexane ring, a benzene ring and a hydrogenated benzene ring. Further, such a ring structure may further have a substituent such as an alkyl group on the ring.
[0073]
It is particularly preferable that 　R 1b is a substituent in which the carbon having a free valence (carbon bonded to the cyclopentadienyl ring) is a tertiary carbon. Specifically, R 1b is a tert-butyl group, a tert-pentyl group, a 1-methylcyclohexyl group, or a 1-adamantyl group.
[0074]
　The fluorene ring moiety is not particularly limited as long as it has a structure obtained from a known fluorene derivative, but R 4b and R 5b are preferably hydrogen atoms from the viewpoint of molecular weight.
　R 2b , R 3b , R 6b and R 7b are preferably hydrocarbon groups having 1 to 20 carbon atoms. Further, R 2b and R 3b may be bonded to each other to form a ring, and R 6b and R 7b may be bonded to each other to form a ring. Examples of such substituted fluorenyl groups include benzofluorenyl group, dibenzofluorenyl group, octahydrodibenzofluorenyl group, 1,1,4,4,7,7,10,10-octamethyl-2. , 3,4,7,8,9,10,12-octahydro-1H-dibenzo [b, h] fluorenyl group, 1,1,3,3,6,6,8,8-octamethyl-2,3, 6,7,8,10-Hexahydro-1H-dicyclopenta [b, h] fluorenyl group, 1', 1', 3', 6', 8', 8'-hexamethyl-1'H, 8'H-dicyclopenta [B, h] Examples include the fluorenyl group.
[0075]
　R 8b is preferably a hydrogen atom. R 9b is preferably an alkyl group having 2 or more carbon atoms. From a synthetic point of view, it is also preferable that R 10b and R 11b are hydrogen atoms.
[0076]
　Alternatively, when n = 1, it is more preferable that R 9b and R 10b are bonded to each other to form a ring, and it is particularly preferable that the ring is a 6-membered ring such as a cyclohexane ring. In this case, R 11b is preferably a hydrogen atom.
[0077]
　R 12b is preferably an alkyl group.
　M is a Group 4 transition metal of the periodic table, for example Ti, Zr or Hf, preferably Zr or Hf, and particularly preferably Zr.
[0078]
　n is an integer of 1 to 3, preferably 1 or 2, and more preferably 1. When n is the above value, it is preferable from the viewpoint of efficiently obtaining the polymer to be produced.
　j is an integer of 1 to 4, preferably 2.
[0079]
　Examples of the compound represented by the general formula [A2] include (8-octamethylfluorene-12'-yl- (2- (adamantan-1-yl) -8-methyl-3,3b, 4,5,6, 7,7a,8-octahydrocyclopenta [a] indene)) zirconium dichloride or (8- (2,3,6,7-tetramethylfluorene) -12'-yl- (2- (adamantan-1-yl)) )-8-Methyl-3,3b,4,5,6,7,7a,8-octahydrocyclopenta [a] indene)) Zyroxide dichloride is particularly preferred. Here, the above-mentioned octamethylfluorene is 1,1,4,4,7,7,10,10-octamethyl-2,3,4,7,8,9,10,12-octahydro-1H-dibenzo [b]. , h] Fluorene.
[0080]
　 << Carrier (b) >> The
　carrier (b) is preferably in the form of particles, and the metallocene catalyst is formed by immobilizing the metallocene compound (a) on the surface and inside thereof. Such a form of catalyst is generally referred to as a metallocene-supported catalyst.
　The carrier (b) contains an organoaluminum compound (b-1), an organoboron compound (b-2), an inorganic compound (b-3), or a complex of two or more selected from these as a main component.
[0081]
　Examples of the organoaluminum compound (b-1) include trialkylaluminum such as trimethylaluminum, triethylaluminum, triisobutylaluminum, and trinormaloctylaluminum, dialkylaluminum hydride such as diisobutylaluminum hydride, tricycloalkylaluminum, and aluminoxane. A typical example is an organoaluminum oxy compound. Further, the organoaluminum compound (b-1) includes, for example, an organoaluminum oxy compound containing a boron atom and a halogen as exemplified in International Publication No. 2005/066191 and International Publication No. 2007/131010. Alminoxane, an ionic aluminoxane as exemplified in WO 2003/082879, can also be mentioned.
[0082]
　Examples of the organoboron compound (b-2) include trialkylammonium tetraarylborate, trialkylammonium tetra (aryl halide) borate, dioctadecylmethylammonium tetraarylborate, and dioctadecilmethylammonium tetra (aryl halide) borate. , N, N-dialkylanilinium tetraarylborates, N, N-dialkylanilinium tetra (aryl halides) borates.
[0083]
　Examples of the inorganic compound (b-3) include porous oxides, inorganic halides, clays, clay minerals, and ion-exchange layered compounds. Examples of the porous oxide include oxides such as SiO 2 , Al 2 O 3 , MgO, ZrO 2 , TiO 2 , B 2 O 3 , CaO, ZnO, BaO, and ThO 2 , or a composite containing these. Examples include mixtures. For example, natural or synthetic zeolite, SiO 2 -MgO, SiO 2 -Al 2 O 3 , SiO 2 -TiO 2 , SiO 2 -V 2 O 5 , SiO 2 -Cr 2 O 3 , SiO 2 -TiO 2 -MgO, etc. can be exemplified. Examples of the inorganic halide include MgCl 2 , MgBr 2 , MnCl 2 , and MnBr 2 . The inorganic halide may be used as it is, or may be used after being pulverized by a ball mill or a vibration mill. Further, it is also possible to use a product obtained by dissolving an inorganic halide in a solvent such as alcohol and then precipitating it in the form of fine particles with a precipitant.
[0084]
　As the carrier (b), a carrier containing an aluminum atom is preferable from the viewpoint of high activity and further suppressing the amount of solvent-soluble parts. The content of aluminum atoms in the carrier (b) is preferably 20% by mass or more, more preferably 20 to 60% by mass, still more preferably 30 to 50% by mass, and particularly preferably 35 to 47% by mass.
[0085]
　As such a carrier (b), solid aluminoxane is preferably used, and is disclosed in, for example, International Publication No. 2010/055652, International Publication No. 2013/146337, or International Publication No. 2014-123212. Solid aluminoxane is particularly preferably used.
[0086]
　By "solid state" is meant that the aluminoxane remains substantially in a solid state in a reaction environment in which the solid aluminoxane is used. More specifically, for example, when each component constituting the olefin polymerization catalyst is brought into contact with each other to prepare an olefin polymerization solid catalyst component, a specific temperature and pressure are used in an inert hydrocarbon medium such as hexane or toluene used in the reaction. Indicates that the aluminoxane is in a solid state in an environment.
[0087]
　The solid aluminoxane preferably contains an aluminoxane having at least one structural unit selected from the structural unit represented by the following formula (1) and the structural unit represented by the following formula (2), and more preferably the following. It contains an aluminoxane having a structural unit represented by the formula (1), and more preferably a polymethylaluminoxane composed of only the structural unit represented by the following formula (1).
[0088]
[Chemical

　formula 3] In formula (1), Me is a methyl group.
[0089]
　In the formula (2), R 1 is a hydrocarbon group having 2 to 20 carbon atoms, preferably a hydrocarbon group having 2 to 15 carbon atoms, and more preferably a hydrocarbon group having 2 to 10 carbon atoms. Examples of the hydrocarbon group include an alkyl group, a cycloalkyl group, and an aryl group.
[0090]
　The structure of the solid aluminoxane has not always been clarified, and it is presumed that the solid aluminoxane usually has a structure in which the structural units represented by the formulas (1) and / or the formula (2) are repeated by about 2 to 50. However, the configuration is not limited to this. In addition, the binding mode of the constituent units varies from linear, cyclic or clustered, for example, and aluminoxane is usually composed of one of these or presumed to be a mixture thereof. .. Further, the aluminoxane may consist of only the structural unit represented by the formula (1) or the formula (2).
[0091]
　As the solid aluminoxane, a solid polymethylaluminoxane is preferable, and a solid polymethylaluminoxane composed of only the structural unit represented by the formula (1) is more preferable.
　The solid aluminoxane functions as a catalyst carrier. Therefore, in addition to the solid aluminoxane, it is not necessary to use, for example, a solid inorganic carrier such as silica, alumina, silica-alumina, magnesium chloride, or a solid organic carrier such as polystyrene beads as the catalyst carrier.
　The solid aluminoxane can be prepared, for example, by the methods described in WO 2010/055652 and WO 2014/123212.
[0092]
　 << Organic compound component (c) >> The
　metallocene catalyst may further contain the organic compound component (c) , if necessary. The organic compound component (c) is used for the purpose of improving the polymerization performance and the physical properties of the produced polymer, if necessary. As the organic compound component (c), the above-mentioned organic aluminum compound (b-1) can be used. Other examples include alcohols, phenolic compounds, carboxylic acids, phosphorus compounds, amides, polyethers and sulfonates.
[0093]
　 << Polymerization Conditions >> The
　polymerization of 4-methyl-1-pentene and a linear α-olefin having 2 to 20 carbon atoms for obtaining the copolymers (A) and (B) includes dissolution polymerization, suspension polymerization and the like. It can be carried out by either the liquid phase polymerization method or the gas phase polymerization method. In the liquid phase polymerization method, an inert hydrocarbon solvent can be used, specifically, aliphatic hydrocarbons such as propane, butane, pentane, hexane, heptane, octane, decane, dodecane, kerosene; cyclopentane, Alicyclic hydrocarbons such as cyclohexane, methylcyclopentane, and methylcyclohexane; aromatic hydrocarbons such as benzene, toluene, and xylene; halogenated hydrocarbons such as ethylene chloride, chlorobenzene, dichloromethane, trichloromethane, and tetrachloromethane; Two or more mixed solvents selected may be mentioned. Further, the olefin itself containing 4-methyl-1-pentene can be used as the polymerization solvent.
[0094]
　In the case of olefin polymerization, the usage and addition order of each component are arbitrarily selected, and the following methods are exemplified. Hereinafter, the metallocene compound (a), the carrier (b), and the organic compound component (c) are also referred to as “components (a) to (c)”, respectively.
(I) A method of adding the component (a) and the component (b) to the polymerizer in an arbitrary order.
(Ii) A method of adding a catalyst component having the component (a) supported on the component (b) to a polymerizer.
[0095]
　In each of the above methods (i) to (ii), the component (c) may be further added at any stage. Moreover, at least two of each catalyst component may be contacted in advance.
　Further, in the solid catalyst component in which the component (a) is supported on the component (b), olefins such as 4-methyl-1-pentene and 3-methyl-1-pentene may be prepolymerized, and the prepolymerization may be performed. A catalyst component may be further supported on the solid catalyst component.
[0096]
　When polymerizing an olefin using a metallocene catalyst, the amount of each component that can constitute the metallocene catalyst is as follows. Further, in the metallocene catalyst, the content of each component can be adjusted as follows.
[0097]
　The component (a) is used in an amount such that it is usually 10 -10 to 10-2 mol, preferably 10 -8 to 10 -3 mol, per liter of the reaction volume . The molar ratio [Al / M] of the aluminum atom in the component (b-1) to the total transition metal atom (M) in the component (a) of the component (b-1) is usually 10 to 10000, preferably 10,000. It can be used in an amount of 30 to 2000, particularly preferably 150 to 500. The molar ratio [(b-2) / M] of the component (b-2) to the total transition metal atoms (M) in the component (a) is usually 10 to 10000, preferably 10 to 10000. It can be used in an amount of 30 to 2000, more preferably 150 to 500. The molar ratio [(b-3) / M] of the component (b-3) to all the transition metal atoms (M) in the component (a) is usually 10 to 10000, preferably 10 to 10000. It can be used in an amount of 30 to 2000, more preferably 150 to 500.
[0098]
　When the component (c) is used, when the component (b) is the component (b-1), the molar ratio of the aluminum atom in the component (b-1) to the component (c) [Al / (c)]. Is usually 0.002 to 500, preferably 0.01 to 60, and when the component (b) is the component (b-2), the component (b-2) and the component (c) When the molar ratio [(b-2) / (c)] is usually 0.002 to 500, preferably 0.01 to 60, and the component (b) is the component (b-3). Is used in an amount such that the molar ratio [(b-3) / (c)] of the component (b-3) to the component (c) is usually 0.002 to 500, preferably 0.01 to 60. be able to.
[0099]
　The polymerization temperature is usually −50 to 200 ° C., preferably 0 to 100 ° C., and more preferably 20 to 100 ° C. The polymerization pressure is usually under the conditions of normal pressure to 10 MPa gauge pressure, preferably normal pressure to 5 MPa gauge pressure. The polymerization reaction can be carried out by any of batch, semi-continuous and continuous methods. Hydrogen can be added to the polymerization system for the purpose of controlling the molecular weight or polymerization activity of the produced polymer, and the amount of hydrogen added is appropriately about 0.001 to 100 NL per 1 kg of olefin.
[0100]
　As the polymerization condition, it is also possible to adopt multi-stage polymerization in which two or more stages of polymerization having different reaction conditions are carried out. For example, the desired molecular weight is obtained by carrying out the polymerization stepwise under two conditions different in the amount of hydrogen used or the ratio of 4-methyl-1-pentene to the linear α-olefin having 2 to 20 carbon atoms. It is possible to obtain polymers with a distribution or composition distribution.
[0101]
　For example, the mixture of the copolymers (A) and (B) is a combination obtained in the step (1) of producing the 4-methyl-1-pentene copolymer (A) by slurry polymerization and the step (1). In the presence of the polymer (A), the 4-methyl-1-pentene copolymer (B) is a copolymer (when the total amount of the copolymers (A) and (B) is 100 parts by mass. It can be produced by a multi-stage polymerization method including the step (2) of producing by slurry polymerization in a range where the amount of B) is 5 to 90 parts by mass.
[0102]
　The multi-stage polymerization method has a step (1) and a step (2) having different polymerization conditions, but the two-step polymerization of the steps (1) and (2) may be performed, and in addition to the steps (1) and (2). It may be a three-stage or higher polymerization including further steps.
[0103]
　 << Step (1) >> In the
　step (1), the 4-methyl-1-pentene copolymer (A) is produced by slurry polymerization. In the step (1), the supply amount ratio of 4-methyl-1-pentene and the linear α-olefin having 2 to 20 carbon atoms is set so that the amount of the structural unit derived from each is within the above-mentioned range. NS.
[0104]
　In step (1), a slurry containing the copolymer (A) is obtained. The slurry concentration, that is, the copolymer (A) particle concentration is usually 0.015 to 45% by mass, preferably 0.03 to 35% by mass.
[0105]
　 << Step (2) >> In
　step (2), the 4-methyl-1-pentene copolymer (B) is produced by slurry polymerization in the presence of the copolymer (A) obtained in step (1). .. In step (2), the supply amount ratio of 4-methyl-1-pentene and the linear α-olefin having 2 to 20 carbon atoms is set so that the amount of the structural unit derived from each is within the above-mentioned range. NS.
[0106]
　In the step (2), when the total amount of the copolymer (A) obtained in the step (1) and the copolymer (B) obtained in the step (2) is 100 parts by mass, the copolymer (2) The copolymer (B) is produced in a range where the amount of B) is 5 to 90 parts by mass.
[0107]
　In the step (2), in one embodiment, 4-methyl-1-pentene and a linear α-olefin having 2 to 20 carbon atoms are added to the slurry containing the copolymer (A), and the slurry of these monomers is added. Polymerization can be performed.
[0108]
　In step (2), a slurry containing particles containing the copolymer (A) and the copolymer (B) is obtained. The slurry concentration, that is, the particle concentration is usually 3 to 50% by mass, preferably 5 to 40% by mass.
[0109]
　In the above-mentioned multi-stage polymerization method, slurry polymerization is adopted, but "slurry polymerization" is a form in which the polymer produced by the polymerization is dispersed in the above-mentioned medium as, for example, fine particles without being substantially dissolved in the above-mentioned medium used at the time of polymerization. It refers to a polymerization characterized by being present in.
[0110]
　 << Solid-Liquid Separation Step >> The
　slurry containing the 4-methyl-1-pentene polymer particles containing the copolymers (A) and (B) obtained in the step (2) is solid-liquid separated, for example. By filtering, the particles can be separated and recovered.
[0111]
　 << Post-treatment step >>
　The 4-methyl-1-pentene polymer particles obtained by the above-mentioned multi-stage polymerization method, for example, the particles obtained by the above-mentioned solid-liquid separation step, are required after being produced by the above-mentioned method. Depending on the situation, a known post-treatment step such as a catalyst deactivation treatment step, a catalyst residue removal step, and a drying step may be performed.
　As described above, a mixture of the copolymers (A) and (B) can be obtained.
[0112]
　
　The resin composition of the present embodiment may further contain other polymer components other than the above-mentioned copolymers (A) and (B). Examples of other polymer components include α-olefin polymers (E) (excluding the above-mentioned copolymers (A) and (B)) and elastomers other than these.
[0113]
　The α-olefin polymer (E) is, for example, a polymer of an α-olefin having 2 to 20 carbon atoms (excluding the above-mentioned copolymers (A) and (B)), and has 2 to 20 carbon atoms. Examples thereof include homopolymers or copolymers of α-olefins.
[0114]
　Examples of α-olefins having 2 to 20 carbon atoms include ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 1-octene, 1-decene, 1-undecene, 1-dodecene and 1-tetradecene. Linear α-olefins such as 1-hexadecene, 1-octadecene, 1-eicosene; isobutene, 3-methyl-1-butene, 3-methyl-1-pentene, 3-ethyl-1-pentene, 4-methyl- Branches of 1-pentene, 4,4-dimethyl-1-pentene, 4-methyl-1-hexene, 4,4-dimethyl-1-hexene, 4-ethyl-1-hexene, 3-ethyl-1-hexene, etc. The state α-olefin can be mentioned. Among these, α-olefins having 15 or less carbon atoms are preferable, and α-olefins having 10 or less carbon atoms are more preferable.
[0115]
　The α-olefin polymer (E) can further have a structural unit derived from the other polymerizable compounds described above in the copolymer (A) as long as the object of the present invention is not impaired.
　In the α-olefin polymer (E), the content ratio of the structural unit derived from the other polymerizable compound is usually 10 mol% or less, preferably 5 in 100 mol% of all the structural units constituting the (E). It is less than or equal to mol%, more preferably less than or equal to 3 mol%.
[0116]
　Specific examples of the α-olefin polymer (E) include low-density polyethylene, high-density polyethylene, ethylene / propylene random copolymer, ethylene / 1-butene random copolymer, and ethylene / propylene / 1-butene random. Copolymers, ethylene / 1-hexene random copolymers, ethylene / 1-octene random copolymers, ethylene / propylene / ethylidenenorbornene random copolymers, ethylene / propylene / 1-butene / ethylidenenorbornene random copolymers, Ethylene copolymers such as ethylene / 1-butene / 1-octene random copolymers, propylene homopolymers, propylene / 1-butene random copolymers, propylene / 1-hexene random copolymers, propylene / 1-octene A propylene copolymer such as a random copolymer, a 1-butene homopolymer, a 1-butene / 1-hexene random copolymer, a butene copolymer such as a 1-butene / 1-octene random copolymer, 4- Examples thereof include 4-methyl-1-pentene copolymers such as methyl-1-pentene homopolymers and 4-methyl-1-pentene / 1-hexene copolymers. Among these, 4-methyl-1-pentene homopolymer and 4-methyl-1-pentene copolymer are preferable from the viewpoint of compatibility.
[0117]
　The ultimate viscosity [η] E of the α-olefin polymer (E) measured in decalin at 135 ° C. is usually 0.1 to 10 dL / g, preferably 0.5 to 5 dL / g.
　The melting point (Tm) of the α-olefin polymer (E) measured by a differential scanning calorimeter (DSC) is not particularly limited, but is preferably 60 ° C. or higher, more preferably 70 to 300 ° C., for the reasons of heat resistance and strength. preferable.
[0118]
　The α-olefin polymer (E) can be produced, for example, by a conventionally known method using a vanadium-based catalyst, a titanium-based catalyst, a metallocene-based catalyst, or the like.
　The resin composition of the present embodiment may contain one or more α-olefin polymers (E).
[0119]
　The content of the α-olefin polymer (E) in the resin composition of the present embodiment is usually 50 parts by mass or less with respect to the total content of the copolymers (A) and (B) of 100 parts by mass. It is preferably 40 parts by mass or less.
[0120]
　In one embodiment, if the resin composition of the present embodiment contains a large amount of 4-methyl-1-pentene homopolymer, the strength of the obtained molded product can be improved, but the stretchability may be deteriorated. .. Therefore, the content ratio of the 4-methyl-1-pentene homopolymer in the resin composition of the present embodiment is preferably 30% by mass or less, more preferably 25% by mass or less, still more preferably 20% by mass or less. be.
[0121]
　
　The resin composition of the present embodiment can contain conventionally known additives.
　Additives include, for example, secondary antioxidants, heat-resistant stabilizers, weather-resistant stabilizers, antistatic agents, slip agents, anti-blocking agents, antifogging agents, lubricants, dyes, pigments, natural oils, synthetic oils, waxes, etc. Examples include fillers and hydrochloric acid absorbers. The content of the additive is not particularly limited, but is usually 0 to 50 parts by mass, preferably 0 to 10 parts by mass, respectively, with respect to 100 parts by mass of the polymer component containing the copolymers (A) and (B). It is a department.
　The resin composition of the present embodiment may contain one kind or two or more kinds of additives.
[0122]
　 [Method for Producing Resin Composition]
　The method for producing the resin composition of the present embodiment will be described.
　The resin composition of the present embodiment can be obtained, for example, by mixing the above-mentioned copolymers (A) and (B) with other polymer components and / or additives, if necessary. .. The mixture of the copolymers (A) and (B) can also be obtained by the above-mentioned multi-stage polymerization method.
[0123]
　As for the mixing method of each component, various known methods, for example, a method of mixing each component using an apparatus such as a plast mill, a Henschel mixer, a V-blender, a ribbon blender, a tumbler, a blender, a kneader ruder, etc .; A method can be adopted in which the obtained mixture is further melt-kneaded with an apparatus such as a uniaxial extruder, a twin-screw extruder, a kneader, and a Banbury mixer, and then the obtained melt-kneaded product is granulated or pulverized.
[0124]
　The resin composition of the present embodiment has a temperature of 135 ° C. from the viewpoint of improving the stretchability of the obtained molded product when measured by a cross-separation chromatograph (CFC) using an infrared spectrophotometer as a detection unit. The amount of the eluted components in the above range is preferably 20% by mass or less, more preferably 15% by mass or less, still more preferably 10% by mass or less, based on the total amount of the eluted components at 0 to 145 ° C. of the resin composition. be. A 4-methyl-1-pentene homopolymer usually corresponds to the elution component in the range of 135 ° C. or higher.
[0125]
　 [Molded product]
　The molded product of the present embodiment contains the resin composition of the present embodiment, and includes, for example, extrusion molding, injection molding, inflation molding, blow molding, extrusion blow molding, injection blow molding, press molding, stamping. It is obtained by a known thermal molding method such as molding, vacuum molding, calendar molding, filament molding, foam molding, powder slush molding and the like.
[0126]
　The molded product of the present embodiment may be a molded product obtained by further processing a primary molded product obtained by a method such as extrusion molding, injection molding, or solution casting by a method such as blow molding or stretching. can.
　As the molded product of this embodiment, a film is preferable in one embodiment. The film of the present embodiment has the properties of a conventional 4-methyl-1-pentene copolymer such as heat resistance, mechanical properties, electrical properties (dielectric breakdown voltage, etc.), and releasability, as well as stretchability and flexibility. Excellent. The film of the present embodiment contains the resin composition of the present embodiment, and can be obtained by melt molding, for example, usually in the range of 180 to 300 ° C. The thickness of the film of this embodiment is usually 2 to 1000 μm, preferably 2 to 500 μm.
[0127]
　The film of the present embodiment can be, for example, a single-layer film obtained from the resin composition of the present embodiment or a laminated film having a layer obtained from the resin composition of the present embodiment. As a method for obtaining a laminated film, for example, a method of laminating another layer on a surface layer film previously obtained by T-die molding or inflation molding by a known laminating method such as extrusion lamination or extrusion coating; a plurality of methods. A method in which films are independently molded and then each film is laminated by dry lamination; a coextrusion molding method in which a plurality of components are subjected to a multi-layer extruder to be molded can be mentioned. The surface layer film is, for example, a layer obtained from the resin composition of the present embodiment.
[0128]
　Applications of the film of the present embodiment include, for example, a
　stretched film: for example, a film for a capacitor; a
　semiconductor process film: for example, a dicing tape, a back grind tape, a die bonding film, a film for a polarizing plate;
　a film for packaging: for example, a food product. Packaging film, stretch film, wrap film, breathable film, shrink film, easy peel film;
　Separator: For example, battery separator, lithium ion battery separator, fuel cell electrolyte film, adhesive / adhesive separator;
　electronic member film : For example, diffusion film, reflective film, radiation resistant film, γ-ray resistant film, porous film;
　Release film: For example, for flexible printed substrate, for ACM substrate, for rigid flexible substrate, for advanced composite material, carbon fiber composite material For curing, for curing glass fiber composite material, for curing aramid fiber composite material, for curing nano composite material, for curing filler filler, for urethane curing, for epoxy curing, for semiconductor encapsulation, for polarizing plate, for diffusion sheet, Release film for prism sheet, reflective sheet, fuel cell or various rubber sheets;
　Surface protective film: For example, for polarizing plate, for liquid crystal panel, for optical parts, for lenses, for electrical parts / electrical appliances, portable phone, protective film for PC or a touch panel, a masking film;
　Building materials film: for example, for building materials window films, glass films, bulletproof material combined, bulletproof glass films, heat shielding sheet, a thermal barrier film;
and the like.
[0129]
　The film of the present embodiment is preferably a stretched film. For example, a primary molded product obtained by molding the resin composition of the present embodiment into a film or sheet by a T-die extrusion molding method or the like is further added. A stretched film obtained by uniaxial stretching or biaxial stretching is preferable. The draw ratio can be 2 to 20 times independently in the MD direction and the TD direction.
[0130]
　Specific uses of the stretched film include a film for a capacitor. Capacitor films may need to be thinned by stretching and increased in strength by orientation. By using the resin composition of the present embodiment, a film having excellent thin film processability and high strength can be obtained. Further, the film tends to be able to maintain transparency even after stretching.
[0131]
　 [Capacitor Film]
　Hereinafter, a second aspect of the present invention will be described.
　The capacitor film of the present embodiment is the second aspect obtained by biaxially stretching a film containing the 4-methyl-1-pentene copolymer (C) described below, and the fourth aspect described below. The second aspect is included, which is obtained by biaxially stretching a film composed of the composition (X) containing the -methyl-1-pentene copolymers (C) and (D).
[0132]
　In the present embodiment, "film" is a general term for molded articles on a flat surface, and is a concept including a sheet, a film (membrane), a tape, and the like.
　The 4-methyl-1-pentene copolymer used in the present embodiment has excellent film stretchability. Further, the capacitor film of the present embodiment has a small decrease in dielectric breakdown voltage even when used in a high temperature environment, has high heat resistance that can maintain quality, and has good dielectric loss characteristics at high temperatures, and thus has a long-term effect. It has electrical characteristics that are superior to its life.
[0133]
　 [Aspect 2-1]
　The film for a capacitor according to the aspect 2-1 is obtained by biaxially stretching a film containing a 4-methyl-1-pentene copolymer (C).
[0134]
　 <4-Methyl-1-pentene copolymer (C)>
　4-Methyl-1-pentene copolymer (C) (hereinafter, also referred to as "copolymer (C)") is 4-methyl-1-pentene. It has a structural unit derived from, and a structural unit derived from an α-olefin having 5 to 20 carbon atoms other than 4-methyl-1-pentene, and satisfies the following requirements (Ca) to (Cd). ..
　The 4-methyl-1-pentene copolymer (C) may be one kind of 4-methyl-1-pentene copolymer satisfying the following requirements (Ca) to (Cd), and may be the following. Two or more kinds of 4-methyl-1-pentene copolymers satisfying the requirements (Ca) to (Cd) may be used.
[0135]
　 << Requirements (CA) >> In the
　copolymer (C), the amount (U5) of the structural unit derived from 4-methyl-1-pentene is 20.0 to 98.0 mol%, and 4-methyl-1-pentene is used. The amount (U6) of the structural unit derived from the α-olefin having 5 to 20 carbon atoms other than 1-pentene is 80.0 to 2.0 mol%. U5 is preferably 20.0 to 97.0 mol%, more preferably 25.0 to 97.0 mol%. U6 is preferably 80.0 to 3.0 mol%, more preferably 75.0 to 3.0 mol%. However, the total of the U5 and the U6 is 100 mol%. The 100 mol% means the total of the U5 and the U6, and does not mean 100 mol% of all the constituent units constituting the copolymer (C).
[0136]
　When the amount of each structural unit is within the above range, the stretchability of the film is good, and as a result, the withstand voltage characteristics of the film tend to be improved, and the decrease in the dielectric breakdown voltage tends to be small, for example, in a high temperature environment. ..
[0137]
　When an α-olefin having 5 to 20 carbon atoms is used as the comonomer, a film having excellent stretchability and withstand voltage characteristics tends to be obtained. Examples of α-olefins having 5 to 20 carbon atoms include 1-pentene, 1-hexene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-heptadecene, 1-octadecene, and the like. 1-Eikosen is mentioned. Among these, α-olefins having 6 to 20 carbon atoms are preferable, α-olefins having 10 to 20 carbon atoms are more preferable, and 1-decene, 1-tetradecene, and so on, from the viewpoint that the obtained film is more excellent in stretchability. 1-Hexadecene and 1-octadecene are more preferable.
[0138]
　The copolymer (C) may have only one type of structural unit derived from an α-olefin having 5 to 20 carbon atoms other than 4-methyl-1-pentene, or may have two or more types.
　The copolymer (C) can further have a structural unit derived from another polymerizable compound as long as the object of the present invention is not impaired. Other polymerizable compounds include, for example, vinyl compounds having a cyclic structure such as styrene, vinylcyclopentene, vinylcyclohexane, vinylnorbornene; vinyl esters such as vinyl acetate; unsaturated organic acids such as maleic anhydride or derivatives thereof; butadiene. , Isoprene, pentadiene, conjugated diene such as 2,3-dimethylbutadiene; 1,4-hexadien, 1,6-octadien, 2-methyl-1,5-hexadien, 6-methyl-1,5-heptadiene, 7- Methyl-1,6-octadien, dicyclopentadiene, cyclohexadiene, dicyclooctadien, methylenenorbornene, 5-vinylnorbornene, 5-ethylidene-2-norbornene, 5-methylene-2-norbornene, 5-isopropylidene-2 -Norbornene, 6-chloromethyl-5-isopropenl-2-norbornene, 2,3-diisopropylidene-5-norbornene, 2-ethylidene-3-isopropylidene-5-norbornene, 2-propenyl-2,2-norbornene Norbornene such as.
[0139]
　In the copolymer (C), the content ratio of the structural unit derived from the other polymerizable compound is usually 10 mol% or less, preferably 5 mol%, out of 100 mol% of all the structural units constituting the (C). Hereinafter, it is more preferably 3 mol% or less.
[0140]
　 << Requirements ( Cb) >> The
　ultimate viscosity [η] C of the copolymer (C) measured in decalin at 135 ° C. is 1.5 to 8.0 dL / g. The [η] C is preferably 2.5 to 7.5 dL / g, more preferably 2.7 to 7.0 dL / g, still more preferably 3.0 to 7.0 dL / g, and particularly preferably 3.0 to 7.0 dL / g. It is 3.5 to 7.0 dL / g. In one embodiment, the [η] C is preferably 2.0 to 7.0 dL / g, more preferably 2.5 to 6.5 dL / g.
　The copolymer (C) in which [η] C is in the above range exhibits good fluidity during molding, and is a 4-methyl-1-pentene copolymer (D) in the second and second aspects described later. ), It is considered that it contributes to the improvement of stretchability. In particular, when [η] C is at least the above lower limit value, the stretchability of the film tends to be superior, and the rigidity tends to be excellent.
[0141]
　 << Requirements (Cc) >> When the
　copolymer (C) is measured by a cross-separation chromatograph device (CFC) using an infrared spectrophotometer in the detection unit, it elutes in the range of 0 ° C. or higher and lower than 100 ° C. There is at least one peak in the amount of components. The peak of the amount of the eluted component preferably exists in the range of 0 to 80 ° C. The position of the peak of the amount of the eluted component is determined by the position of the peak top.
[0142]
　In one embodiment, the copolymer (C) preferably has no peak in the amount of eluted components in the range of 100 ° C. or higher and lower than 140 ° C. That is, it is preferable that the peak top of the amount of the eluted component is not in the range of 100 ° C. or higher and lower than 140 ° C.
　The copolymer (C) satisfying the requirement (Cc) contains a component having lower crystallinity than the copolymer (D) described later, and the obtained film tends to exhibit high flexibility.
[0143]
　 << Requirements (Cd) >> When the
　copolymer (C) is measured by a cross fractionation chromatograph device (CFC) using an infrared spectrophotometer in the detection unit, elution in the range of 0 ° C. or higher and lower than 100 ° C. The molecular weight distribution (Mw / Mn), which is the ratio of the weight average molecular weight (Mw) to the number average molecular weight (Mn), of the components is 1.0 to 7.0. The Mw / Mn is preferably 1.0 to 6.5, more preferably 1.2 to 6.0. Each of the average molecular weights is measured by a gel permeation chromatography (GPC) method and is a polystyrene-equivalent value.
[0144]
　By using the copolymer (C) having Mw / Mn in the above range, the stretchability of the film is improved, and as a result, the withstand voltage characteristics of the film tend to be improved. The decrease tends to be small, and the stable electrical characteristics required for the capacitor film are likely to be exhibited.
　The copolymer (C) having Mw / Mn in the above range can be obtained, for example, by using a metallocene catalyst described later.
[0145]
　 In the
　second aspect, other polymer components can be used together with the copolymer (C). Specific examples of other polymer components include α-olefin polymers (E'), which will be described later, and elastomers other than these.
[0146]
　Further, in the second aspect, a conventionally known additive can be used together with the copolymer (C). Additives include, for example, secondary antioxidants, heat-resistant stabilizers, weather-resistant stabilizers, antistatic agents, slip agents, anti-blocking agents, antifogging agents, lubricants, dyes, pigments, natural oils, synthetic oils, waxes, etc. Examples include fillers and hydrochloric acid absorbers. The amount of the additive used is not particularly limited, but is usually 0 to 50 parts by mass, preferably 0 to 10 parts by mass, respectively, with respect to 100 parts by mass of the copolymer (C).
[0147]
　 [Aspects 2-2]
　The film for a capacitor according to the second aspect has 90 to 5 parts by mass of the 4-methyl-1-pentene copolymer (C) described above and the following requirements (Da) to. 10 to 95 parts by mass of the 4-methyl-1-pentene copolymer (D) satisfying (Dd) and (D-a1) (however, the total of the copolymer (C) and the copolymer (D) is 100. It is obtained by biaxially stretching a film composed of the composition (X) containing (part by mass).
[0148]
　 <4-Methyl-1-pentene copolymer (D)>
　4-Methyl-1-pentene copolymer (D) (hereinafter, also referred to as "copolymer (D)") is 4-methyl-1-pentene. It has a structural unit derived from, and a structural unit derived from an α-olefin having 2 to 20 carbon atoms other than 4-methyl-1-pentene, and has the following requirements (Da) to (Dd) and ( D-a1) is satisfied. It is preferable that the copolymer (D) further satisfies the following requirement (D-b1).
[0149]
　The 4-methyl-1-pentene copolymer (D) is a type of 4-methyl-1-pentene copolymer that satisfies the following requirements (Da) to (Dd) and (D-a1). It may be two or more kinds of 4-methyl-1-pentene copolymers satisfying the following requirements (Da) to (Dd) and (Da1).
[0150]
　 << Requirements (DA) >> In the
　copolymer (D), the amount (U7) of the structural unit derived from 4-methyl-1-pentene is 80.0 to 99.9 mol%, and 4-methyl-1-pentene is used. The amount (U8) of the structural unit derived from the α-olefin having 2 to 20 carbon atoms other than 1-pentene is 20.0 to 0.1 mol%. U7 is preferably 85.0 to 99.9 mol%, more preferably 90.0 to 99.9 mol%. U8 is preferably 15.0 to 0.1 mol%, more preferably 10.0 to 0.1 mol%. However, the total of the U7 and the U8 is 100 mol%. The 100 mol% means the total of the U7 and the U8, and does not mean 100 mol% of all the constituent units constituting the copolymer (D).

The scope of the claims
[Claim 1]
　4-Methyl-1-pentene copolymer (A) satisfying the following requirements (Aa) to (Ad), and the following requirements (Ba), (Ba1), (Bb), Contains (Bb1) and 4-methyl-1-pentene copolymer (B) satisfying (Bc) to (Bd), and contains the
　copolymers (A) and (B). When the total amount is 100 parts by mass, the content of the copolymer (A) is 10 to 95 parts by mass, and the content of the copolymer (B) is 90 to 5 parts by mass. Resin composition.
(Aa) The amount (U1) of the structural unit derived from 4-methyl-1-pentene is 80.0 to 99.9 mol%, and is selected from linear α-olefins having 2 to 20 carbon atoms. The total amount (U2) of the constituent units derived from at least one type is 20.0 to 0.1 mol% (provided that the total of the U1 and the U2 is 100 mol%).
( Ab ) The ultimate viscosity [η] A measured in decalin at 135 ° C. is 0.5 to 5.0 dL / g.
(Ac) When the copolymer (A) is measured by a cross-separation chromatograph device (CFC) using an infrared spectrophotometer as a detection unit, the amount of eluted components peaks in the range of 100 to 140 ° C. There is at least one.
(Ad) The ratio of the weight average molecular weight (Mw) to the number average molecular weight (Mn) in the elution component in the range of 100 to 140 ° C. when the copolymer (A) is measured by the CFC. The molecular weight distribution (Mw / Mn) is 1.0 to 3.5.
The amount (U3) of the structural unit derived from (BA) 4-methyl-1-pentene is 20.0 to 98.0 mol%, and is selected from linear α-olefins having 2 to 20 carbon atoms. The total amount (U4) of the constituent units derived from at least one type is 80.0 to 2.0 mol% (provided that the total of the U3 and the U4 is 100 mol%).
(BA1) The ratio (U4 / U2) of U2 (mol%) described in the requirement (Aa) to U4 (mol%) described in the requirement (BA) is 1.0. Exceeded and less than 50.0.
( Bb ) The ultimate viscosity [η] B measured in decalin at 135 ° C. is 2.0 to 8.0 dL / g.
[Eta] according to (B-b1) the requirement (A-b) A and, [eta] according to the requirements (B-b) B ratio of ([eta] B / [eta] A ) is , More than 1.0 and less than 6.0.
(BC) When the copolymer (B) is measured by a cross-separation chromatograph device (CFC) using an infrared spectrophotometer in the detection unit, the amount of eluted components is in the range of 0 ° C. or higher and lower than 100 ° C. There is at least one peak of.
(Bd) The ratio of the weight average molecular weight (Mw) to the number average molecular weight (Mn) of the eluted components in the range of 0 ° C. or higher and lower than 100 ° C. when the copolymer (B) is measured by the CFC. The molecular weight distribution (Mw / Mn) is 1.0 to 7.0.
[Claim 2]
　The resin composition according to claim 1, wherein the linear α-olefins in the copolymers (A) and (B) are independently linear α-olefins having 5 to 20 carbon atoms.
[Claim 3]
　At least the linear α-olefins in the copolymers (A) and (B) are independently selected from 1-hexene, 1-octene, 1-decene, 1-tetradecene, 1-hexadecene and 1-octadecene, respectively. The resin composition according to claim 1 or 2, which is one type.
[Claim 4]
　When the total content of the copolymers (A) and (B) is 100 parts by mass, the content of the copolymer (A) is 15 to 90 parts by mass, and the copolymer (B). The resin composition according to any one of claims 1 to 3, wherein the content of) is 85 to 10 parts by mass.
[Claim 5]
　When measured by a cross fractionation chromatograph (CFC) using an infrared spectrophotometer for the detection unit, the amount of eluted components in the range of 135 ° C or higher is relative to the total amount of eluted components in the resin composition at 0 to 145 ° C. The resin composition according to any one of claims 1 to 4, which is 20% by mass or less.
[Claim 6]
　A molded product containing the resin composition according to any one of claims 1 to 5.
[Claim 7]
　A film comprising the resin composition according to any one of claims 1 to 5.
[Claim 8]
　The film according to claim 7, which is a film for a capacitor.
[Claim 9]
　A film for a capacitor obtained by biaxially stretching a film containing a 4-methyl-1-pentene copolymer (C) satisfying the following requirements (Ca) to (Cd).
(CA) The amount (U5) of the structural unit derived from 4-methyl-1-pentene is 20.0 to 98.0 mol%, and the number of carbon atoms other than 4-methyl-1-pentene is 5 to 20. The amount (U6) of the structural unit derived from α-olefin is 80.0 to 2.0 mol%.
(C-b) The ultimate viscosity [η] C measured in decalin at 135 ° C. is 1.5 to 8.0 dL / g.
(C) When the copolymer (C) is measured by a cross-separation chromatograph device (CFC) using an infrared spectrophotometer in the detection unit, the amount of eluted components is in the range of 0 ° C. or higher and lower than 100 ° C. There is at least one peak of.
(Cd) The ratio of the weight average molecular weight (Mw) to the number average molecular weight (Mn) of the eluted components in the range of 0 ° C. or higher and lower than 100 ° C. when the copolymer (C) is measured by the CFC. The molecular weight distribution (Mw / Mn) is 1.0 to 7.0.
[Claim 10]
　90 to 5 parts by mass of the 4-methyl-1-pentene copolymer (C) satisfying the following requirements (Ca) to (Cd), and the following requirements (Da) to (Dd) and ( 10 to 95 parts by mass of the 4-methyl-1-pentene copolymer (D) satisfying D-a1) (however, the total of the copolymer (C) and the copolymer (D) is 100 parts by mass). A film for a capacitor obtained by biaxially stretching a film composed of the composition (X) contained therein.
(CA) The amount (U5) of the structural unit derived from 4-methyl-1-pentene is 20.0 to 98.0 mol%, and the number of carbon atoms other than 4-methyl-1-pentene is 5 to 20. The amount (U6) of the structural unit derived from α-olefin is 80.0 to 2.0 mol%.
(C-b) The ultimate viscosity [η] C measured in decalin at 135 ° C. is 1.5 to 8.0 dL / g.
(C) When the copolymer (C) is measured by a cross-separation chromatograph device (CFC) using an infrared spectrophotometer in the detection unit, the amount of eluted components is in the range of 0 ° C. or higher and lower than 100 ° C. There is at least one peak of.
(Cd) The ratio of the weight average molecular weight (Mw) to the number average molecular weight (Mn) of the eluted components in the range of 0 ° C. or higher and lower than 100 ° C. when the copolymer (C) is measured by the CFC. The molecular weight distribution (Mw / Mn) is 1.0 to 7.0.
(Da) The amount (U7) of the structural unit derived from 4-methyl-1-pentene is 80.0 to 99.9 mol%, and the number of carbon atoms other than 4-methyl-1-pentene is 2 to 20. The amount (U8) of the structural unit derived from α-olefin is 20.0 to 0.1 mol%.
(Db) Extreme viscosity [η] measured in decalin at 135 ° C. D is 0.5 to 5.0 dL / g.
(Dc) When the copolymer (D) is measured by a cross-separation chromatograph device (CFC) using an infrared spectrophotometer in the detection unit, the amount of eluted components is in the range of 100 ° C. or higher and lower than 140 ° C. There is at least one peak of.
(Dd) The ratio of the weight average molecular weight (Mw) to the number average molecular weight (Mn) of the eluted components in the range of 100 ° C. or higher and lower than 140 ° C. when the copolymer (D) is measured by the CFC. The molecular weight distribution (Mw / Mn) is 1.0 to 3.5.
(D-a1) The ratio (U6 / U8) of U6 (mol%) described in the requirement (CA) to U8 (mol%) described in the requirement (Da) is 1.0. Exceeded and less than 50.0.
[Claim 11]
　The film for a capacitor according to claim 10, wherein the α-olefin in the copolymer (D) is an α-olefin having 5 to 20 carbon atoms other than 4-methyl-1-pentene.
[Claim 12]
　The film for a capacitor according to claim 10, wherein the α-olefins in the copolymers (C) and (D) are independently α-olefins having 10 to 20 carbon atoms.
[Claim 13]
　9. The ratio V (150 ° C.) / V (23 ° C.) of the dielectric breakdown strength V (23 ° C.) at 23 ° C. to the dielectric breakdown strength V (150 ° C.) at 150 ° C. is 0.50 or more. The film for a capacitor according to any one of 12 to 12.
[Claim 14]
　The dielectric loss tangent tan δ (23 ° C.) at 23 ° C. is 400 × 10 -5 or less, the
　dielectric loss tangent tan δ (150 ° C.) at 150 ° C. is 50 × 10 -5 or less, and
　tan δ (23 ° C.) and tan δ (150 ° C.). ) To tan δ (150 ° C.) / tan δ (23 ° C.) of 0.10 or less, according
to any one of claims 9 to 13.
[Claim 15]
　The film for a capacitor according to any one of claims 9 to 14, wherein the draw ratio is 1.1 to 100 times in terms of area.
[Claim 16]
　The film for a capacitor according to any one of claims 9 to 15, which has a thickness of 1 to 20 μm.
[Claim 17]
　A metallized film having a capacitor film according to any one of claims 9 to 16 and a metal film provided on at least one side of the film.
[Claim 18]
　A film capacitor having the metallized film according to claim 17.