Resin composition and molded article

Abstract

The resin composition of the present invention contains a liquid crystalline polymer and a fluororesin. The peak area percentage of the CF₃ group content relative to the CF₂ group content in the fluororesin determined by the following [CF₃ group content measurement method] is 0.05% or more. [CF₃ group content measurement method] The CF₃ group content relative to the CF₂ group content in the fluororesin is calculated as an area percentage from the peak area ICF₃ corresponding to the CF₃ group and the peak area ICF₂ corresponding to the CF₂ group measured by ¹⁹F solid NMR, and is obtained by the following formula (f1). CF₃ group content (%) = {(ICF₃ / 3) / (ICF₂ / 2)} × 100 (f1).

Description

Technical Field

[0001] The present invention relates to a resin composition and a molded article.

[0002] This application claims priority based on Japanese Patent Application No. 2021-014344 filed in Japan on February 1, 2021, and incorporates its content herein. Background Art

[0003] Due to the ease of molding and processing and light weight of polymer materials, they are used in various fields. Among them, in recent years, high-performance polymer materials (engineering materials) that can replace metals or ceramics have been used in various fields such as electrical, electronic, mechanical, optical equipment, automotive, aircraft, and medical fields.

[0004] Among them, in electrical / electronic components, in the trend of thinner, lighter, shorter, and smaller, further miniaturization of these components is being promoted. In addition, these components tend to require higher performance such as thermal stability to a degree suitable for surface mounting technology using lead-free soft solder.

[0005] From the viewpoint of meeting these requirements, among the above-mentioned engineering materials, liquid crystalline polymers can be said to be particularly excellent materials. Liquid crystalline polymers are materials with good moldability such as thin-wall fluidity and low flash performance, high thermal stability, high mechanical strength, and excellent insulation, and have high flame retardancy without using additives with high environmental loads.

[0006] As a resin composition containing a liquid crystalline polymer, for example, in Patent Document 1, there is disclosed a liquid crystalline polyester resin composition in the form of pellets, which is characterized in that it is a liquid crystalline resin composition containing at least 100 parts by weight of a liquid crystalline polyester resin and 10 to 100 parts by weight of glass fiber, the weight average fiber length of the above glass fiber is 30 to 100 μm, and 0.1 to 5.0% by weight of glass fiber with a fiber length of 300 to 500 μm is contained in all the glass fibers.

[0007] Prior Art Documents

[0008] Patent Documents

[0009] Patent Document 1: International Publication No. 2012 / 090410 Summary of the Invention

[0010] Problems to be Solved by the Invention

[0011] However, in the case of conventional resin compositions such as those described in Patent Document 1, the occurrence of dieswelling sometimes becomes a problem. Here, dieswelling is a phenomenon in which molten resin expands after exiting an extrusion molding die. If dieswelling occurs, the particle size of the resulting granules becomes uneven, and thus the productivity decreases.

[0012] The present invention has been made in view of such circumstances, and an object thereof is to provide a resin composition having an excellent effect of suppressing the occurrence of dieswelling and a molded body produced using the resin composition.

[0013] Means for Solving the Problems

[0014] In order to solve the above problems, the present invention adopts the following configuration.

[0015] [1] A resin composition containing a liquid crystalline polymer and a fluororesin, wherein the peak area percentage of the CF3 group content relative to the CF2 group content in the fluororesin determined by the following [CF3 Group Content Measurement Method] is 0.05% or more.

[0016] [CF3 Group Content Measurement Method]

[0017] The CF3 group content relative to the CF2 group content in the fluororesin is calculated as an area percentage from the peak area ICF3 corresponding to the CF3 group and the peak area ICF2 corresponding to the CF2 group measured by 19 19F solid-state NMR, and is obtained by the following formula (f1).

[0018] CF3 group content (%) = {(ICF3 / 3) / (ICF2 / 2)} × 100 (f1)

[0019] [2] The resin composition according to [1], further containing glass fiber.

[0020] [3] The resin composition according to [1] or [2], further containing a plate-like filler.

[0021] [4] The resin composition according to any one of [1] to [3], wherein the resin decomposition start temperature of the fluororesin is 473°C or higher.

[0022] [5] A molded body produced using the resin composition according to any one of [1] to [4].

[0023] Advantages of the Invention

[0024] According to the present invention, it is possible to provide a resin composition having an excellent effect of suppressing the occurrence of dieswelling and a molded body produced using the resin composition. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram showing the spool for a coil of the present embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] (Resin composition)

[0027] The resin composition of the present embodiment contains a liquid crystalline polymer and a fluororesin.

[0028] <Liquid crystalline polymer>

[0029] The liquid crystalline polymer in the resin composition of the present embodiment is a thermoplastic resin that exhibits liquid crystal-like properties in which the molecular straight chains are regularly arranged in a molten state. It should be noted that a resin composition containing a liquid crystalline polymer also preferably exhibits liquid crystallinity in a molten state, and the resin composition of the present embodiment preferably melts at a temperature of 450°C or lower.

[0030] By containing a liquid crystalline polymer, the resin composition of the present embodiment is high-strength, has high heat resistance, and also has high dimensional accuracy.

[0031] As the liquid crystalline polymer in the resin composition of the present embodiment, it may be a liquid crystal polyester, a liquid crystal polyester amide, a liquid crystal polyester ether, a liquid crystal polyester carbonate, or a liquid crystal polyester imide.

[0032] As the liquid crystalline polymer in the resin composition of the present embodiment, a liquid crystal polyester is preferred, and a wholly aromatic liquid crystal polyester made only from aromatic compounds as raw material monomers is more preferred.

[0033] As typical examples of the liquid crystalline polymer in the resin composition of the present embodiment, there may be mentioned a liquid crystalline polymer obtained by polymerizing (polycondensing) an aromatic hydroxycarboxylic acid, an aromatic dicarboxylic acid, and at least one compound selected from the group consisting of an aromatic diol, an aromatic hydroxyamine, and an aromatic diamine, a liquid crystalline polymer obtained by polymerizing a plurality of aromatic hydroxycarboxylic acids, a liquid crystalline polymer obtained by polymerizing an aromatic dicarboxylic acid and at least one compound selected from the group consisting of an aromatic diol, an aromatic hydroxyamine, and an aromatic diamine, and a liquid crystalline polymer obtained by polymerizing a polyester such as polyethylene terephthalate and an aromatic hydroxycarboxylic acid. Here, the aromatic hydroxycarboxylic acid, the aromatic dicarboxylic acid, the aromatic diol, the aromatic hydroxyamine, and the aromatic diamine may each independently be replaced in part or in whole by their polymerizable derivatives.

[0034] Examples of polymerizable derivatives of compounds having a carboxyl group such as aromatic hydroxycarboxylic acids and aromatic dicarboxylic acids include substances (esters) obtained by converting the carboxyl group into an alkoxycarbonyl group or an aryloxycarbonyl group, substances (acyl halides) obtained by converting the carboxyl group into a halocarbonyl group, and substances (acid anhydrides) obtained by converting the carboxyl group into an acyloxycarbonyl group. Examples of polymerizable derivatives of compounds having a hydroxyl group such as aromatic hydroxycarboxylic acids, aromatic diols, and aromatic hydroxyamines include substances (acylates) obtained by acylating the hydroxyl group to convert it into an acyloxy group. Examples of polymerizable derivatives of compounds having an amino group such as aromatic hydroxyamines and aromatic diamines include substances (acylates) obtained by acylating the amino group to convert it into an acylamino group.

[0035] The flow start temperature of the liquid crystalline polymer in the resin composition of the present embodiment is, for example, preferably 280°C or higher, more preferably 280°C or higher and 420°C or lower, and still more preferably 300°C or higher and 400°C or lower.

[0036] The higher the flow start temperature of the liquid crystalline polymer in the resin composition of the present embodiment, the more likely it is that the heat resistance and strength / rigidity will increase. On the other hand, if the flow start temperature of the liquid crystalline polymer exceeds 420°C, the melting temperature and melt viscosity of the resin composition containing the liquid crystalline polymer tend to increase. Therefore, the temperature required for molding the resin composition tends to increase.

[0037] The flow start temperature is also called the flow temperature or the melting temperature. It is the temperature at which a liquid crystalline polymer is melted while increasing the temperature at a rate of 4°C / minute under a load of 9.8 MPa (100 kg / cm 2 ) using a capillary rheometer and extruded from a nozzle with an inner diameter of 1 mm and a length of 10 mm, and shows a viscosity of 4800 Pa·s (48000 poise). It is the temperature that is the target of the molecular weight of the liquid crystalline polymer (refer to Naoyuki Koide, ed., "Liquid Crystal Polymers - Synthesis, Molding, Applications -", CMC Co., Ltd., June 5, 1987, p. 95).

[0038] As the liquid crystalline polymer in the resin composition of the present embodiment, a liquid crystal polyester having a repeating unit (u1) represented by the following formula (1) (hereinafter, also referred to as "repeating unit (u1)"), a repeating unit (u2) represented by the following formula (2) (hereinafter, also referred to as "repeating unit (u2)"), and a repeating unit (u3) represented by the following formula (3) (hereinafter, also referred to as "repeating unit (u3)") is particularly preferred.

[0039] (1) -O-Ar 1 -CO-

[0040] (2) -CO-Ar2 -CO-

[0041] (3)-X-Ar 3 -Y-

[0042] (In the formula, Ar 1 represents phenylene. Ar 2 and Ar 3 each independently represent phenylene or biphenylene. X and Y each independently represent an oxygen atom or an imino group (-NH-). The hydrogen atoms of the groups represented by Ar 1 , Ar 2 and Ar 3 may also be independently substituted by a halogen atom, an alkyl group having 1 to 10 carbon atoms, or an aryl group having 6 to 20 carbon atoms.)

[0043] ·Repeating unit (u1)

[0044] The repeating unit (u1) is a repeating unit derived from monohydroxybenzoic acid.

[0045] In the above formula (1), Ar 1 is phenylene, and the hydrogen atoms of the phenylene may also be substituted by a halogen atom, an alkyl group having 1 to 10 carbon atoms, or an aryl group having 6 to 20 carbon atoms.

[0046] Examples of the above halogen atom include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.

[0047] Examples of the above alkyl group include a methyl group, an ethyl group, a n-propyl group, an isopropyl group, a n-butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, a n-hexyl group, a 2-ethylhexyl group, a n-octyl group, and a n-decyl group.

[0048] Examples of the above aryl group include a phenyl group, an o-tolyl group, a m-tolyl group, a p-tolyl group, a 1-naphthyl group, and a 2-naphthyl group.

[0049] As the repeating unit (u1), among the above, preferably Ar 1 is a repeating unit of p-phenylene (a repeating unit derived from p-hydroxybenzoic acid).

[0050] ·Repeating unit (u2)

[0051] The repeating unit (u2) is a repeating unit derived from a specified aromatic dicarboxylic acid.

[0052] Ar 2 represents phenylene or biphenylene, and the hydrogen atoms of the phenylene and biphenylene may also be substituted by a halogen atom, an alkyl group having 1 to 10 carbon atoms, or an aryl group having 6 to 20 carbon atoms. Examples of the halogen atom, the alkyl group having 1 to 10 carbon atoms, and the aryl group having 6 to 20 carbon atoms include those that can be the same as those for Ar 1Groups such as halogen atoms in which the hydrogen atoms of the above-mentioned groups are substituted, alkyl groups having 1 to 10 carbon atoms, and aryl groups having 6 to 20 carbon atoms.

[0053] As the repeating unit (u2), among the above, Ar is preferred. 2 Is a repeating unit of p-phenylene (repeating unit derived from terephthalic acid), Ar 2 Is a repeating unit of m-phenylene (repeating unit derived from isophthalic acid) and Ar 2 Is a repeating unit of diphenyl ether-4,4'-diyl (repeating unit derived from diphenyl ether-4,4'-dicarboxylic acid), and more preferably Ar 2 Is a repeating unit of p-phenylene (repeating unit derived from terephthalic acid), Ar 2 Is a repeating unit of m-phenylene (repeating unit derived from isophthalic acid).

[0054] · Repeating unit (u3)

[0055] The repeating unit (u3) is a repeating unit derived from a specified aromatic diol, aromatic hydroxyamine, or aromatic diamine.

[0056] Ar 3 Represents phenylene or biphenylene, and the hydrogen atoms of the phenylene and biphenylene may also be substituted with halogen atoms, alkyl groups having 1 to 10 carbon atoms, or aryl groups having 6 to 20 carbon atoms. As the halogen atoms, alkyl groups having 1 to 10 carbon atoms, and aryl groups having 6 to 20 carbon atoms, those similar to the halogen atoms, alkyl groups having 1 to 10 carbon atoms, and aryl groups having 6 to 20 carbon atoms that can substitute the hydrogen atoms of the above-mentioned groups represented by Ar can be cited. 1 Groups such as halogen atoms in which the hydrogen atoms of the above-mentioned groups are substituted, alkyl groups having 1 to 10 carbon atoms, and aryl groups having 6 to 20 carbon atoms.

[0057] X and Y are each independently an oxygen atom or an imino group (-NH-), and preferably both are oxygen atoms.

[0058] As the repeating unit (u3), among the above, Ar is preferred. 3 Is a repeating unit of p-phenylene (repeating unit derived from hydroquinone, p-aminophenol, or p-phenylenediamine) and Ar 3 Is a repeating unit of 4,4'-biphenylene (repeating unit derived from 4,4'-dihydroxybiphenyl, 4-amino-4'-hydroxybiphenyl, or 4,4'-diaminobiphenyl), and more preferably Ar 3 Is a repeating unit of 4,4'-biphenylene, where X and Y are oxygen atoms (repeating unit derived from 4,4'-dihydroxybiphenyl).

[0059] The number of repeating units (u1) relative to the total number of all repeating units (100%) is preferably 30% or more, more preferably 40% or more, and further preferably 50% or more.

[0060] On the other hand, the number of repeating units (u1) is preferably 80% or less, more preferably 70% or less, and still more preferably 65% or less, relative to the total number of all repeating units.

[0061] For example, the number of repeating units (u1) in a liquid crystal polyester is preferably 30% or more and 80% or less, more preferably 40% or more and 70% or less, and still more preferably 50% or more and 65% or less.

[0062] The number of repeating units (u2) is preferably 7% or more, more preferably 10% or more, and still more preferably 15% or more, relative to the total number of all repeating units.

[0063] On the other hand, the number of repeating units (u2) is preferably 35% or less, more preferably 30% or less, and still more preferably 25% or less, relative to the total number of all repeating units.

[0064] For example, the number of repeating units (u2) in a liquid crystal polyester is preferably 7% or more and 35% or less, more preferably 10% or more and 30% or less, and still more preferably 15% or more and 25% or less.

[0065] The number of repeating units (u3) is preferably 7% or more, more preferably 10% or more, and still more preferably 15% or more, relative to the total number of all repeating units.

[0066] On the other hand, the number of repeating units (u3) is preferably 35% or less, more preferably 30% or less, and still more preferably 25% or less, relative to the total number of all repeating units.

[0067] For example, the number of repeating units (u3) in a liquid crystal polyester is preferably 7% or more and 35% or less, more preferably 10% or more and 30% or less, and still more preferably 15% or more and 25% or less.

[0068] In a liquid crystal polyester having repeating units (u1), repeating units (u2), and repeating units (u3), the sum of the number of repeating units (1), the number of repeating units (2), and the number of repeating units (3) does not exceed 100%.

[0069] In the present specification, the number of each repeating unit can be determined, for example, by the analysis method described in Japanese Patent Application Laid-Open No. 2000-19168.

[0070] Specifically, by reacting a liquid crystal polyester resin with a lower alcohol (an alcohol having 1 to 3 carbon atoms) in a supercritical state to depolymerize the liquid crystal polyester resin to monomers from which its repeating units are derived, and quantifying the monomers from which each repeating unit is derived obtained as a depolymerization product by liquid chromatography, the number of each repeating unit can be calculated.

[0071] For example, in the case where the liquid crystal polyester resin contains the repeating units (u1) to (u3), the number of the repeating units (u1) can be obtained by calculating the molar concentrations of the monomers that respectively derive the repeating units (u1) to (u3) using liquid chromatography, and calculating the ratio of the molar concentration of the monomer that derives the repeating unit (u1) when the total of the molar concentrations of the monomers that respectively derive the repeating units (u1) to (u3) is set to 100%.

[0072] The liquid crystal polyester having such a specified repeating unit composition is excellent in heat resistance / thermal stability. The larger the number of the repeating units (u1), the easier it is to improve the melt fluidity, heat resistance / thermal stability, and strength / rigidity. However, if it is too large, the melting temperature and melt viscosity tend to become high, and the temperature required for molding tends to become high.

[0073] The number of the repeating units (u2) in the liquid crystal polyester is preferably substantially equal to the number of the repeating units (u3).

[0074] Specifically, the ratio of the number of the repeating units (u2) to the number of the repeating units (u3) is expressed as [the number of the repeating units (u2)] / [the number of the repeating units (u3)], and is, for example, 0.9 / 1 to 1 / 0.9, preferably 0.95 / 1 to 1 / 0.95, and more preferably 0.98 / 1 to 1 / 0.98.

[0075] The liquid crystal polyester may independently have two or more types of the repeating units (u1) to (u3). In addition, the liquid crystal polyester may have repeating units other than the repeating units (u1) to (u3), but the number thereof is, for example, 10% or less, preferably 5% or less, based on the total number of all repeating units.

[0076] As the liquid crystalline polymer in the resin composition of the present embodiment, specific examples of the liquid crystalline polymer having high heat resistance / thermal stability include:

[0077] (i) Ar having a proportion of preferably 40% or more and 80% or less, more preferably 45% or more and 75% or less, and still more preferably 50% or more and 70% or less, based on the total number of all repeating units 1 is the repeating unit (u1) which is a p-phenylene group (i.e., the repeating unit derived from p-hydroxybenzoic acid),

[0078] (ii) Ar having a proportion of preferably 1% or more and 30% or less, more preferably 10% or more and 25% or less, and still more preferably 15% or more and 20% or less 2 is the repeating unit (u2) which is a p-phenylene group (i.e., the repeating unit derived from terephthalic acid),

[0079] (iii) having Ar preferably of 1% or more and 15% or less, more preferably 1% or more and 10% or less, still more preferably 1% or more and 5% or less 2 a repeating unit (u2) which is a meta-phenylene group (i.e., a repeating unit derived from isophthalic acid),

[0080] (iv) having Ar preferably of 5% or more and 40% or less, more preferably 10% or more and 30% or less, still more preferably 15% or more and 25% or less 3 a repeating unit (u3) which is a 4,4'-biphenylene group, and X and Y are oxygen atoms (i.e., a repeating unit derived from 4,4'-dihydroxybiphenyl) of a liquid crystal polyester.

[0081] In the liquid crystal polyester having the repeating unit (u1), the repeating unit (u2) and the repeating unit (u3), the sum of the number of the repeating unit (1), the number of the repeating unit (2) and the number of the repeating unit (3) does not exceed 100%.

[0082] The number of each of the above repeating units becomes a value approximate to the ratio (mol%) of each repeating unit calculated from the input amount of the raw material monomers.

[0083] Therefore, the preferred ratio (mol%) of each repeating unit calculated from the input amount of the raw material monomers becomes the same value as the preferred number (%) of each of the above repeating units.

[0084] The liquid crystalline polymer in the present embodiment is preferably produced by melt-polymerizing raw material monomers corresponding to the repeating units constituting the polymer and subjecting the resulting polymer to solid-phase polymerization. Thereby, a high molecular weight liquid crystalline polymer having high heat resistance / thermal stability and high strength / rigidity can be produced with good operability.

[0085] The melt polymerization may be carried out in the presence of a catalyst. Examples of such a catalyst include metal compounds such as magnesium acetate, stannous acetate, tetrabutyl titanate, lead acetate, sodium acetate, potassium acetate, antimony trioxide, and nitrogen-containing heterocyclic compounds such as 4-(dimethylamino)pyridine and 1-methylimidazole. A nitrogen-containing heterocyclic compound is preferably used.

[0086] The liquid crystalline polymer in the present embodiment is preferably melt-kneaded using an extruder and then formed into pellets.

[0087] As the extruder, an extruder having a barrel, one or more screws disposed in the barrel, and one or more supply ports provided in the barrel is preferably used. Further, as the extruder, an extruder having one or more exhaust portions provided in the barrel is more preferably used. In addition, an extruder having a kneading portion on the downstream side of the supply port (in the case where a plurality of supply ports are provided, respectively on the downstream side of each supply port) is preferably used. Here, the kneading portion refers to a portion provided on a part of the screw and used for effectively performing melt-kneading. Examples of the kneading portion include kneading disks (forward kneading disks, neutral kneading disks, reverse kneading disks), mixing screws, and the like.

[0088] The extruder is preferably connected to a decompression device at a portion having one or more exhaust portions. By degassing the inside of the barrel of the extruder using a decompression device during the melt-kneading of the liquid crystalline polymer, residual low-molecular-weight components can be removed from the liquid crystalline polymer.

[0089] The liquid crystalline polymer in the resin composition of the present embodiment may be used alone or in combination of two or more.

[0090] The content of the liquid crystalline polymer in the resin composition of the present embodiment is preferably 30% by mass or more, more preferably 40% by mass or more, and further preferably 55% by mass or more, based on the total amount of the resin composition.

[0091] On the other hand, the content of the liquid crystalline polymer is preferably 95% by mass or less, more preferably 70% by mass or less, and further preferably 65% by mass or less, based on the total amount of the resin composition.

[0092] For example, the content of the liquid crystalline polymer is preferably 30% by mass or more and 95% by mass or less, more preferably 40% by mass or more and 70% by mass or less, and further preferably 55% by mass or more and 65% by mass or less, based on the total amount of the resin composition.

[0093] <Fluororesin>

[0094] The peak area percentage of the CF3 group content relative to the CF2 group content in the fluororesin in the resin composition of the present embodiment, as determined by the following [Method for Measuring CF3 Group Content], is 0.05% or more.

[0095] [Method for Measuring CF_{3} Group Content]

[0096] The CF3 group content relative to the CF2 group content in the above fluororesin is calculated as an area percentage from the peak area ICF3 corresponding to the CF3 group and the peak area ICF2 corresponding to the CF2 group measured by 19 solid-state 19F NMR, and is obtained by the following formula (f1).

[0097] Content of CF3 group (%) = {(ICF3 / 3) / (ICF2 / 2)} × 100 (f1)

[0098] The percentage of peak area of the above-mentioned CF3 group content is determined with reference to the content described in Macromolecules 2001, 34, 66 - 75.

[0099] As the NMR apparatus for measuring solid samples, for example, a 400 MHz NMR apparatus (manufactured by JEOL Ltd., Bruker Corporation, Agilent Technologies, Varian Inc., etc.) can be cited.

[0100] Calculating the content of CF3 group 19 The solid-state 19F NMR measurement is carried out, for example, by the single-pulse method, and the measurement conditions are as follows.

[0101] Measurement apparatus: PS400WB (manufactured by Varian Inc.)

[0102] Static magnetic field strength: 9.4 Tesla (resonance frequency: 400 MHz (1H))

[0103] Magic angle spinning: 35 kHz (35,000 revolutions per second)

[0104] Repetition time: 15 s

[0105] Number of accumulations: 128 times

[0106] Temperature: 26 °C

[0107] Chemical shift reference substance: hexafluorobenzene

[0108] In the fluororesin in the resin composition of the present embodiment, the percentage of peak area of the CF3 group content relative to the CF2 group content in the above-mentioned fluororesin determined by the above [method for measuring CF3 group content] is 0.05% or more, preferably 0.05% or more and 1.0% or less, more preferably 0.05% or more and 0.20% or less, still more preferably 0.05% or more and 0.15% or less, and particularly preferably 0.05% or more and 0.10% or less.

[0109] Since the percentage of peak area of the CF3 group content in the fluororesin in the resin composition of the present embodiment is 0.05% or more, the effect of suppressing die swell of the resin composition of the present embodiment containing the fluororesin becomes good.

[0110] On the other hand, if the percentage of peak area of the above-mentioned CF3 group content is below the above-mentioned preferred upper limit value, the thermal stability is further improved.

[0111] The resin decomposition start temperature of the fluororesin in the resin composition of the present embodiment is preferably 450 °C or higher, more preferably 470 °C or higher, and further preferably 473 °C or higher.

[0112] Here, the resin decomposition start temperature is the temperature at which the weight reduction rate becomes 0.1% when the fluororesin is heated from 25 °C (room temperature) to 800 °C at a heating rate of 10 °C / min using a thermogravimetric analyzer (product name; TGA-50, manufactured by Shimadzu Corporation).

[0113] The upper limit value of the resin decomposition start temperature of the fluororesin in the resin composition of the present embodiment is not particularly limited, and is, for example, 600 °C or lower.

[0114] For example, the resin decomposition temperature of the fluororesin in the resin composition of the present embodiment is preferably 450 °C or higher and 600 °C or lower, more preferably 470 °C or higher and 600 °C or lower, and further preferably 473 °C or higher and 600 °C or lower.

[0115] The number average molecular weight (Mn) of the fluororesin in the resin composition of the present embodiment is preferably 100 to 5,000,000, more preferably 200 to 1,000,000, further preferably 300 to 50,000, and particularly preferably 10,000 to 30,000.

[0116] In the present specification, the number average molecular weight (Mn) is the number average molecular weight (Mn) determined by the method described in J. Appl. Polym. Sci. 1973, 17, 3253. Specifically, it is the value calculated by the following formula (m-1) from the heat of crystallization (ΔHc: cal / g) determined using a differential scanning calorimeter (product name; DSC-50, manufactured by Shimadzu Corporation). Here, the heat of crystallization (ΔHc) is the heat determined from the area of the crystallization peak in the DSC curve.

[0117] Number average molecular weight (Mn) = 2.1×10 10 ΔHc -5.16 (m-1)

[0118] If the number average molecular weight (Mn) of the fluororesin in the resin composition of the present embodiment is within the above-mentioned preferred range, the thermal stability and the effect of suppressing die swell are further improved.

[0119] The peak area percentage of the CF3 group content, the resin decomposition start temperature, and the number average molecular weight (Mn) of the above-mentioned fluororesin can be controlled by changing the manufacturing method of the fluororesin.

[0120] For example, regarding the peak area percentage of the CF3 group content in the fluororesin, by increasing the side chains of the fluororesin, or controlling the degree of polymerization of the fluororesin, or controlling the mixing ratio of the raw material monomers, a fluororesin with a peak area percentage of the CF3 group content of 0.05% or more can be obtained.

[0121] As the fluororesin in the resin composition of the present embodiment, specifically, polytetrafluoroethylene (PTFE), tetrafluoroethylene-hexafluoropropylene copolymer (FEP), poly(chlorotrifluoroethylene) (PCTFE), ethylene-tetrafluoroethylene copolymer, ethylene-chlorotrifluoroethylene copolymer, polyvinylidene fluoride (PVDF), tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (perfluoroalkoxy alkane, PFA), etc. can be mentioned.

[0122] As the fluororesin in the resin composition of the present embodiment, among the above, from the viewpoints of improving thermal stability and the suppression effect of die swell occurrence, PTFE is preferred.

[0123] That is, as the fluororesin in the resin composition of the present embodiment, PTFE with a peak area percentage of the CF3 group content relative to the CF2 group content in PTFE obtained by the above [CF3 group content measurement method] of 0.05% or more is preferred, more preferably PTFE with a peak area percentage of the CF3 group content of 0.05% or more and 1.0% or less, still more preferably PTFE with a peak area percentage of the CF3 group content of 0.05% or more and 0.20% or less, and further preferably PTFE with a peak area percentage of the CF3 group content of 0.05% or more and 0.10% or less.

[0124] In addition, as the fluororesin in the resin composition of the present embodiment, PTFE with a resin decomposition start temperature of 450 °C or more and 600 °C or less is preferred, more preferably PTFE with a resin decomposition start temperature of 470 °C or more and 600 °C or less, and further preferably PTFE with a resin decomposition start temperature of 473 °C or more and 600 °C or less.

[0125] In addition, as the fluororesin in the resin composition of the present embodiment, the number average molecular weight (Mn) is preferably PTFE of 100 to 5,000,000, more preferably 200 to 1,000,000, still more preferably 300 to 50,000, and particularly preferably 10,000 to 30,000.

[0126] The fluororesin in the resin composition of the present embodiment can be used alone as one kind, or two or more kinds can be used in combination.

[0127] The content of the fluororesin in the resin composition of the present embodiment is preferably 0.05% by mass or more, more preferably 0.10% by mass or more, and still more preferably 0.50% by mass or more, based on the total amount of the resin composition.

[0128] On the other hand, the content of the fluororesin is preferably 5.0% by mass or less, more preferably 1.5% by mass or less, and still more preferably 1.0% by mass or less, based on the total amount of the resin composition.

[0129] For example, the content of the fluororesin is preferably 0.05% by mass or more and 5.0% by mass or less, more preferably 0.10% by mass or more and 1.5% by mass or less, and still more preferably 0.50% by mass or more and 1.0% by mass or less, based on the total amount of the resin composition.

[0130] If the content of the fluororesin in the resin composition of the present embodiment is within the above-preferred range based on the total amount of the resin composition, the inhibitory effect on die swell is further improved.

[0131] In addition, the content of the fluororesin in the resin composition of the present embodiment is preferably 0.1 part by mass or more, more preferably 0.5 part by mass or more, and still more preferably 1.0 part by mass or more, based on 100 parts by mass of the above liquid crystalline polymer.

[0132] On the other hand, the content of the fluororesin is preferably 5.0 parts by mass or less, more preferably 3.0 parts by mass or less, and still more preferably 2.0 parts by mass or less, based on 100 parts by mass of the liquid crystalline polymer.

[0133] For example, the content of the fluororesin is preferably 0.1 part by mass or more and 5.0 parts by mass or less, more preferably 0.5 part by mass or more and 3.0 parts by mass or less, and still more preferably 1.0 part by mass or more and 2.0 parts by mass or less.

[0134] If the content of the fluororesin in the resin composition of the present embodiment is within the above-preferred range based on 100 parts by mass of the liquid crystalline polymer, the thermal stability and the inhibitory effect on die swell are further improved.

[0135] In the resin composition of the present embodiment, when PTFE is used as the fluororesin, the fluororesin in the resin composition of the present embodiment can be produced, for example, by the following methods (production method (i) or (ii)).

[0136] Production method (i)

[0137] Production method (i) is a method for producing polytetrafluoroethylene (PTFE) by combining emulsion polymerization and suspension polymerization. Specifically, in the presence of a polymerization initiator (water-soluble peroxide) and an aqueous medium (for example, deionized high-purity pure water), tetrafluoroethylene is polymerized to form emulsion particles. Then, these emulsion particles are coagulated to form coagulated powder. Then, by polymerizing tetrafluoroethylene in the presence of this coagulated powder, polymerization initiator and aqueous medium, polytetrafluoroethylene (PTFE) with the peak area percentage of the CF3 group content within the above range can be produced.

[0138] Production method (ii)

[0139] Production method (ii) is a production method for polymerizing tetrafluoroethylene and at least one arbitrary comonomer in an aqueous polymerization medium.

[0140] Specifically, by polymerizing tetrafluoroethylene and at least one copolymerizable fluorinated ethylenically unsaturated comonomer (for example, perfluoro(propyl vinyl ether) (PPVE)) while adjusting the mixing ratio of each monomer under a specific dispersant (for example, a mixture of ammonium perfluoroalkyl (C4 - C 16 ) ethyl sulfonate), polytetrafluoroethylene (PTFE) with the peak area percentage of the CF3 group content within the above range can be produced.

[0141] For example, the content of the comonomer in this PTFE is preferably 0.005 mol% - 20 mol%.

[0142] The fluororesin in the resin composition of this embodiment is preferably a fluororesin produced by production method (ii) above.

[0143] <Any component>

[0144] The resin composition of this embodiment contains the above-mentioned liquid crystalline polymer and fluororesin, and may further contain components other than these (any components) within the range of exerting the effects of the present invention.

[0145] As the said any component, for example, glass fiber, inorganic fillers other than glass fiber, pigments, additives, etc. can be cited.

[0146] 《Glass fiber》

[0147] The type of glass fiber in the resin composition of this embodiment is not particularly limited, and known glass fibers can be used. For example, E glass (that is, alkali-free glass), C glass (that is, glass for acid-resistant use), AR glass (that is, glass for alkali-resistant use), S glass or T glass, etc. can be cited.

[0148] Among them, the glass fiber is preferably E glass.

[0149] The glass fiber can be an untreated glass fiber or a treated glass fiber.

[0150] The treatment of the glass fiber can be carried out by a sizing agent, a silane coupling agent, a boron compound, etc. As the sizing agent, an aromatic carbamate-based sizing agent, an aliphatic carbamate-based sizing agent, an acrylic-based sizing agent, etc. can be cited.

[0151] The fiber diameter of the glass fiber in the resin composition of the present embodiment is not particularly limited, but for example, it is preferably 1 to 40 μm, more preferably 3 to 35 μm, and further preferably 5 to 15 μm.

[0152] The fiber length of the glass fiber in the resin composition of the present embodiment is not particularly limited, but for example, it is preferably 10 to 150 μm, more preferably 30 to 125 μm, and further preferably 50 to 100 μm.

[0153] The fiber diameter and fiber length of the glass fiber in the resin composition of the present embodiment can be measured by, for example, a scanning electron microscope, an optical microscope, etc.

[0154] The glass fiber in the resin composition of the present embodiment can be used alone as 1 type, or 2 or more types can be used in combination.

[0155] The content of the glass fiber in the resin composition of the present embodiment is preferably 10% by mass or more, more preferably 20% by mass or more, and further preferably 35% by mass or more with respect to the total amount of the resin composition.

[0156] On the other hand, the content of the glass fiber is preferably 70% by mass or less, more preferably 60% by mass or less, and further preferably 45% by mass or less with respect to the total amount of the resin composition.

[0157] For example, the content of the glass fiber is preferably 10% by mass or more and 70% by mass or less, more preferably 20% by mass or more and 60% by mass or less, and further preferably 35% by mass or more and 45% by mass or less with respect to the total amount of the resin composition.

[0158] If the content of the glass fiber in the resin composition of the present embodiment is within the above-mentioned preferred range, in addition to the effect of suppressing die swell, the mechanical strength of the molded body can be further improved.

[0159] In addition, when the resin composition of the present embodiment contains glass fiber, the content of the above-mentioned fluororesin is preferably 0.05 part by mass or more, more preferably 0.10 part by mass or more, and further preferably 0.50 part by mass or more with respect to 100 parts by mass of the above-mentioned liquid crystalline polymer and glass fiber.

[0160] On the other hand, the content of the fluororesin is preferably 5.0 parts by mass or less, more preferably 1.5 parts by mass or less, and still more preferably 1.0 part by mass or less with respect to 100 parts by mass of the above-mentioned liquid crystalline polymer and glass fiber.

[0161] For example, the content of the fluororesin is preferably 0.05 part by mass or more and 5.0 parts by mass or less, more preferably 0.10 part by mass or more and 1.5 parts by mass or less, and still more preferably 0.50 part by mass or more and 1.0 part by mass or less with respect to 100 parts by mass of the above-mentioned liquid crystalline polymer and glass fiber.

[0162] If the content of the fluororesin in the resin composition of the present embodiment with respect to the liquid crystalline polymer and glass fiber is within the above-mentioned preferred range, the balance of thermal stability, suppression effect of die swell occurrence, and mechanical strength becomes good.

[0163] 《Inorganic fillers other than glass fiber》

[0164] The inorganic filler other than glass fiber in the resin composition of the present embodiment may be a fibrous filler, a plate-like filler, or a granular filler other than fibrous and plate-like.

[0165] The inorganic filler in the resin composition of the present embodiment is preferably the above-mentioned plate-like filler.

[0166] Specific examples of the plate-like filler include talc, mica, and the like.

[0167] · Talc

[0168] As the talc in the resin composition of the present embodiment, talc obtained by pulverizing magnesium hydrosilicate is preferred.

[0169] The crystal structure of the molecules of magnesium hydrosilicate is a pyrophyllite-type three-layer structure, and talc is formed by overlapping this structure.

[0170] As the talc, plate-like talc obtained by finely pulverizing the crystal of the molecules of magnesium hydrosilicate to the unit layer level is more preferred.

[0171] Talc may be untreated talc or treated talc.

[0172] Examples of the treated talc include talc surface-treated with a known surfactant. Examples of such a surfactant include silane coupling agents, titanium coupling agents, higher fatty acids, higher fatty acid esters, higher fatty acid amides, higher fatty acid salts, and the like.

[0173] The median particle size (D50) of the talc is preferably 5 to 30 μm, more preferably 10 to 25 μm.

[0174] The median particle diameter (D50) of talc can be measured, for example, by a well-known laser diffraction particle size distribution measuring device or the like.

[0175] In the resin composition of the present embodiment, one kind of talc can be used alone, or two or more kinds can be used in combination.

[0176] The content of talc in the resin composition of the present embodiment is preferably 5% by mass or more, more preferably 15% by mass or more, and still more preferably 25% by mass or more, based on the total amount of the resin composition.

[0177] On the other hand, the content of talc is preferably 80% by mass or less, more preferably 70% by mass or less, and still more preferably 60% by mass or less, based on the total amount of the resin composition.

[0178] For example, the content of talc is preferably 5% by mass or more and 80% by mass or less, more preferably 15% by mass or more and 70% by mass or less, and still more preferably 25% by mass or more and 60% by mass or less, based on the total amount of the resin composition.

[0179] If the content of talc in the resin composition of the present embodiment is within the above range, the mechanical strength of the molded body made using the resin composition can be further improved.

[0180] · Mica

[0181] Mica is a pulverized product of a silicate mineral containing aluminum, potassium, magnesium, sodium, iron, etc. It is a substance having a structure in which two or three metal oxide / hydroxide octahedral structures are sandwiched between four tetrahedral structures formed by oxides of 3 atoms of silicon (Si) and 1 atom of aluminum (Al).

[0182] As the mica in the present embodiment, any one of natural mica such as muscovite, phlogopite, fluorophlogopite, and tetrasilicic mica, and synthetic mica manufactured artificially can be used.

[0183] Mica can be untreated mica or treated mica.

[0184] As the treated mica, mica surface-treated with a well-known surfactant can be cited. As the surfactant, for example, a silane coupling agent, a titanium coupling agent, a higher fatty acid, a higher fatty acid ester, a higher fatty acid amide, higher fatty acid salts, etc. can be cited.

[0185] As the median particle diameter (D50) of mica, it is preferably 5 to 30 μm, more preferably 10 to 25 μm.

[0186] The median particle diameter (D50) of mica can be measured, for example, by a well-known laser diffraction particle size distribution measuring device or the like.

[0187] In the resin composition of the present embodiment, one kind of mica can be used alone, or two or more kinds can be used in combination.

[0188] The content of mica in the resin composition of the present embodiment is preferably 5% by mass or more, more preferably 15% by mass or more, and still more preferably 25% by mass or more, based on the total amount of the resin composition.

[0189] On the other hand, the content of mica is preferably 80% by mass or less, more preferably 70% by mass or less, and still more preferably 60% by mass or less, based on the total amount of the resin composition.

[0190] For example, the content of mica is preferably 5% by mass or more and 80% by mass or less, more preferably 15% by mass or more and 70% by mass or less, and still more preferably 25% by mass or more and 60% by mass or less, based on the total amount of the resin composition.

[0191] If the content of mica in the resin composition of the present embodiment is within the above range, the mechanical strength of the molded body produced using the resin composition can be further improved.

[0192] "Pigment"

[0193] Examples of the pigment include alumina, iron oxide, cobalt oxide, chromium oxide, manganese oxide, titanium oxide, carbon black, titanium yellow, etc. Among them, carbon black and titanium oxide are preferred.

[0194] In the resin composition of the present embodiment, one kind of pigment can be used alone, or two or more kinds can be used in combination.

[0195] The content of the pigment in the resin composition of the present embodiment is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, and still more preferably 0.5% by mass or more, based on the total amount of the resin composition.

[0196] On the other hand, the content of the pigment is preferably 10% by mass or less, more preferably 7% by mass or less, and still more preferably 5% by mass or less, based on the total amount of the resin composition.

[0197] For example, the content of the pigment is preferably 0.05% by mass or more and 10% by mass or less, more preferably 0.1% by mass or more and 7% by mass or less, and still more preferably 0.5% by mass or more and 5% by mass or less, based on the total amount of the resin composition.

[0198] · Carbon black

[0199] The content of carbon black in the resin composition of this embodiment is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, and still more preferably 0.5% by mass or more, based on the total amount of the resin composition.

[0200] On the other hand, the content of carbon black is preferably 5% by mass or less, more preferably 3% by mass or less, and still more preferably 1.5% by mass or less, based on the total amount of the resin composition.

[0201] For example, the content of carbon black is preferably 0.05% by mass or more and 5% by mass or less, more preferably 0.1% by mass or more and 3% by mass or less, and still more preferably 0.5% by mass or more and 1.5% by mass or less, based on the total amount of the resin composition.

[0202] The average primary particle diameter of carbon black is preferably 20 to 50 nm, more preferably 20 to 40 nm.

[0203] The primary particle size of carbon black can be determined by the method described in Carbon Black Yearbook No. 48 (1998) p. 114 published by the Carbon Black Association.

[0204] Specifically, it can be calculated by using a transmission electron microscope to observe carbon black at a magnification of 20,000 times, measuring the diameters of the primary particles of any 1000 carbon black particles, and calculating their number average value.

[0205] The specific surface area of carbon black is, for example, preferably 30 to 200 m 2 / g, more preferably 50 to 160 m 2 / g.

[0206] The specific surface area of carbon black refers to the nitrogen adsorption specific surface area. The measurement of this nitrogen adsorption specific surface area can be carried out by removing the gas attached to the surface of the sample in advance, adsorbing nitrogen on the sample at the liquid nitrogen temperature, and calculating the specific surface area from the adsorption amount.

[0207] Specifically, in accordance with JIS K6217-2:2001, a BET specific surface area analyzer (for example, AccuSorb 2100E manufactured by Micromeritics) can be used to adsorb nitrogen at the liquid nitrogen temperature, measure the adsorption amount, and calculate it by the BET method.

[0208] The oil absorption amount of carbon black is preferably 30 mL / 100 g or more and 120 mL / 100 g or less, more preferably 40 mL / 100 g or more and 80 mL / 100 g or less.

[0209] The oil absorption amount of carbon black can be determined by using a dibutyl phthalate absorption meter according to the method described in JIS K6217-4:2001.

[0210] · Titanium oxide

[0211] The titanium oxide in the resin composition of the present embodiment is not particularly limited, and publicly known titanium oxide can be used.

[0212] The crystal structure of the titanium oxide is not particularly limited, and it can be rutile type, anatase type, or a mixture of both.

[0213] In addition, surface-treated titanium oxide can also be used as the titanium oxide.

[0214] For example, by surface-treating titanium oxide with an inorganic metal oxide, properties such as dispersibility can be improved. As the inorganic metal oxide, alumina can be cited, for example.

[0215] The average particle size of the titanium oxide is preferably 0.1 to 1 μm, more preferably 0.15 to 0.25 μm.

[0216] The average particle size of the titanium oxide can be measured, for example, by a publicly known laser diffraction particle size distribution measuring device.

[0217] One type of titanium oxide in the resin composition of the present embodiment can be used alone, or two or more types can be used in combination.

[0218] The content of the titanium oxide in the resin composition of the present embodiment is preferably 0.5% by mass or more, more preferably 1% by mass or more, and further preferably 2% by mass or more, based on the total amount of the resin composition.

[0219] On the other hand, the content of the titanium oxide is preferably 10% by mass or less, more preferably 7% by mass or less, and further preferably 5% by mass or less, based on the total amount of the resin composition.

[0220] For example, the content of the titanium oxide is preferably 0.5% by mass or more and 10% by mass or less, more preferably 1% by mass or more and 7% by mass or less, and further preferably 2% by mass or more and 5% by mass or less, based on the total amount of the resin composition.

[0221] If the content of the titanium oxide in the resin composition of the present embodiment is within the above range, the mechanical strength of the molded body made using the resin composition can be further improved.

[0222] 《Additives》

[0223] Examples of the additives include flame retardants, conductivity-imparting agents, crystal nucleating agents, ultraviolet absorbers, antioxidants, vibration dampers, antibacterial agents, insect repellents, deodorants, coloring inhibitors, heat stabilizers, mold release agents, antistatic agents, plasticizers, lubricants, dyes, foaming agents, foam suppressants, viscosity modifiers, and surfactants.

[0224] The resin composition of the present embodiment described above contains a liquid crystalline polymer and a fluororesin, and the peak area percentage of the CF3 group content relative to the CF2 group content in the fluororesin determined by the above [Method for Measuring CF3 Group Content] is 0.05% or more.

[0225] By using the liquid crystalline polymer in combination with the fluororesin having a peak area percentage of the CF3 group content of 0.05% or more, the resin composition of the present embodiment can further improve the inhibitory effect on the occurrence of die swell.

[0226] In addition, by using the liquid crystalline polymer in combination with the fluororesin having a peak area percentage of the CF3 group content of 0.05% or more, the resin composition of the present embodiment can further improve the thermal stability.

[0227] The present invention has the following aspects.

[0228] "1" A resin composition containing a liquid crystalline polymer and a fluororesin,

[0229] The peak area percentage of the CF3 group content relative to the CF2 group content in the above fluororesin determined by the following [Method for Measuring CF3 Group Content] is 0.05% or more, preferably 0.05% or more and 1.0% or less, more preferably 0.05% or more and 0.20% or less, and still more preferably 0.05% or more and 0.10% or less.

[0230] [Method for Measuring CF3 Group Content]

[0231] The CF3 group content relative to the CF2 group content in the above fluororesin is calculated as an area percentage from the peak area ICF3 corresponding to the CF3 group and the peak area ICF2 corresponding to the CF2 group measured by 19 19F solid-state NMR, and is determined by the following formula (f1).

[0232] CF3 group content (%) = {(ICF3 / 3) / (ICF2 / 2)} × 100 (f1)

[0233] "2" The resin composition according to "1", wherein the liquid crystalline polymer is a liquid crystal polyester having a repeating unit (u1) represented by the following formula (1), a repeating unit (u2) represented by the following formula (2), and a repeating unit (u3) represented by the following formula (3).

[0234] (1) -O-Ar 1 -CO-

[0235] (2) -CO-Ar 2 -CO-

[0236] (3)-X-Ar 3 -Y-

[0237] (In the formula, Ar 1 represents a phenylene group. Ar 2 and Ar 3 each independently represent a phenylene group or a biphenylene group. X and Y each independently represent an oxygen atom or an imino group (-NH-). The hydrogen atoms of the groups represented by Ar 1 , Ar 2 and Ar 3 may each independently be substituted with a halogen atom, an alkyl group having 1 to 10 carbon atoms, or an aryl group having 6 to 20 carbon atoms.)

[0238] "3" The resin composition according to "1" or "2", wherein the content of the above-mentioned liquid crystalline polymer is preferably 30% by mass or more and 95% by mass or less, more preferably 40% by mass or more and 70% by mass or less, and still more preferably 55% by mass or more and 65% by mass or less, based on the total amount of the resin composition.

[0239] The content of the above-mentioned fluororesin is preferably 0.05% by mass or more and 5.0% by mass or less, more preferably 0.10% by mass or more and 1.5% by mass or less, and still more preferably 0.50% by mass or more and 1.0% by mass or less, based on the total amount of the resin composition.

[0240] "4" The resin composition according to any one of "1" to "3", wherein the above-mentioned fluororesin is polytetrafluoroethylene (PTFE).

[0241] "5" The resin composition according to any one of "1" to "4", further comprising glass fiber.

[0242] "6" The resin composition according to "5", wherein the content of the above-mentioned glass fiber is preferably 10% by mass or more and 70% by mass or less, more preferably 20% by mass or more and 60% by mass or less, and still more preferably 35% by mass or more and 45% by mass or less, based on the total amount of the resin composition.

[0243] "7" The resin composition according to any one of "1" to "6", further comprising a plate-like filler.

[0244] "8" The resin composition according to any one of "1" to "7", wherein the resin decomposition start temperature of the above-mentioned fluororesin is 473 °C or higher.

[0245] "9"A resin composition having the following properties: Using the resin composition described in any one of "1" to "8", a test piece with a width of 64 mm × a length of 64 mm × a thickness of 3 mm is produced by injection molding. Using a colorimeter, the b value of the test piece immediately after production is measured. * And the b value of the test piece after heating at 300 °C for 2 hours. * In the case of, the b value of the test piece immediately after production. * And the b value of the test piece after heating at 300 °C for 2 hours. * The rate of change is preferably 12% or less, more preferably 9% or less, further preferably 5% or less, and particularly preferably less than 3.3%.

[0246] (Manufacturing method of resin composition)

[0247] As the manufacturing method of the resin composition of the present embodiment, a manufacturing method of a resin composition having the following steps can be cited: a step of manufacturing a fluororesin in which the peak area percentage of the CF3 group content relative to the CF2 group content obtained by the following [CF3 group content measurement method] is 0.05% or more; and

[0248] A step of mixing the above fluororesin and the liquid crystalline polymer.

[0249] [CF3 group content measurement method]

[0250] The CF3 group content relative to the CF2 group content in the above fluororesin is calculated as an area percentage from the peak area ICF3 corresponding to the CF3 group and the peak area ICF2 corresponding to the CF2 group measured by 19 19F solid-state NMR, and is obtained by the following formula (f1).

[0251] CF3 group content (%) = {(ICF3 / 3) / (ICF2 / 2)} × 100 (f1)

[0252] As the step of manufacturing the fluororesin in which the peak area percentage of the above CF3 group content is 0.05% or more, specifically, the above manufacturing methods (i) to (iv) can be cited, and among them, manufacturing methods (ii) to (iv) are preferred.

[0253] (Molded body)

[0254] The molded body of the present embodiment is a molded body produced using the above resin composition.

[0255] The molded article of the present embodiment can be obtained by a known molding method using a resin composition. As the molding method of the resin composition of the present embodiment, a melt molding method is preferred. Examples thereof include extrusion molding methods such as injection molding, T-die method, and blow molding method, compression molding method, blow molding method, vacuum molding method, and pressure molding. Among them, injection molding method is preferred.

[0256] For example, when the above resin composition is used as a molding material and molded by an injection molding method, a known injection molding machine is used to melt the resin composition, and the molten resin composition is injected into a mold for molding.

[0257] Here, when the resin composition is put into an injection molding machine, each component can be put into the injection molding machine separately, or a part or all of the components can be mixed in advance and put into the injection molding machine as a mixture.

[0258] Examples of known injection molding machines include TR450EH3 manufactured by Shadick Co., Ltd., and hydraulic horizontal molding machine PS40E5ASE type manufactured by Nissei Plastic Industrial Co., Ltd.

[0259] The temperature conditions for injection molding are appropriately determined according to the type of liquid crystalline polymer. It is preferred to set the barrel temperature of the injection molding machine to a temperature 10 to 80 °C higher than the flow start temperature of the liquid crystalline polymer used.

[0260] From the aspects of the cooling rate and productivity of the resin composition, the temperature of the mold is preferably set within the range of room temperature (25 °C) to 180 °C.

[0261] As other injection conditions, it is only necessary to appropriately adjust the screw rotation speed, back pressure, injection speed, holding pressure, holding time, etc.

[0262] The molded article of the present embodiment is applicable to all uses to which a normal liquid crystalline polymer can be applied.

[0263] Examples of the molded body of the present embodiment include electrical / electronic components such as connectors, sockets, relay components, coil bobbins, optical pickups, oscillators, printed wiring boards, circuit boards, semiconductor packages, computer-related components, etc.; semiconductor manufacturing process-related components such as IC trays, wafer carriers, etc.; household electrical product components such as VTRs, TVs, irons, air conditioners, stereos, vacuum cleaners, refrigerators, rice cookers, lighting fixtures, etc.; lighting fixture components such as lamp reflectors, lamp sockets, etc.; audio product components such as compact discs, laser discs (registered trademark), speakers, etc.; communication equipment components such as optical cable ferrules, telephone components, fax components, modems, etc.; copier and printer-related components such as separating claws, heater brackets, etc.; mechanical components such as impellers, fan gears, gears, bearings, motor components and housings, etc.; automotive components such as automotive mechanism components, engine components, engine room interior components, electrical components, interior components, etc., cooking utensils such as microwave cooking pots, heat-resistant tableware, etc.; heat insulation and sound insulation materials such as floor materials, wall materials, etc., support materials such as beams, columns, etc., building materials or civil engineering materials such as roof materials; components for airplanes, spacecraft, and space equipment; components for radiation facilities such as nuclear reactors, components for ocean facilities, washing fixtures, optical equipment components, valves, pipes, nozzles, filters, membranes, medical equipment components and medical materials, sensor components, sanitary spare parts, sports goods, and leisure goods.

[0264] The molded body of the present embodiment is preferably used as the coil bobbin among the above.

[0265] Hereinafter, the preferred use, that is, the coil bobbin, will be described in detail.

[0266] Figure 1 It is a schematic diagram showing the coil bobbin for the coil of the present embodiment. As shown in the figure, the coil bobbin 1A has a main body portion 2 and a pair of flange portions 3.

[0267] In the following description, an xyz orthogonal coordinate system is set, and the positional relationship of each component will be described with reference to this xyz orthogonal coordinate system. Here, the extending direction of the main body portion 2 is set as the x-axis direction, the direction orthogonal to the x-axis direction in the horizontal plane is set as the y-axis direction, and the direction orthogonal to the x-axis direction and the y-axis direction respectively (i.e., the vertical direction) is set as the z-axis direction.

[0268] The main body portion 2 is a cylindrical member. The main body portion 2 has a shaft hole 29 that penetrates the main body portion 2 in the x-axis direction. On the outer surface 2b of the main body portion 2, a winding is wound along the circumferential direction of the main body portion 2. The winding wound on the outer surface 2b forms a coil.

[0269] The flange portion 3 is provided at both ends in the extending direction of the shaft hole 29 of the main body portion 2. The flange portion 3 is in the shape of a ring that expands in the yz plane direction. The flange portion 3 may also have a through hole for inserting the winding.

[0270] An electrical and electronic component such as the coil spool 1A described above, i.e., the coil spool, is used as the core of a coil formed by winding a winding. Since the coil wound around the spool is likely to become high temperature due to the use environment and heating generated by energization, the molded body of the present embodiment having high thermal stability is useful as a coil spool.

[0271] Since the molded body of the present embodiment described above uses the above resin composition, the particle shape obtained from the resin composition is not likely to become irregular, and when the particles are put into a molding machine, unevenness during plasticization and metering is reduced, so that defects are less likely to occur.

[0272] Examples

[0273] Hereinafter, the present invention will be described more specifically by way of examples, but the present invention is not limited to the following examples.

[0274] [Measurement of the flow start temperature of the liquid crystalline polymer]

[0275] The flow start temperature of the liquid crystalline polymer was measured using a flow property evaluation device (manufactured by Shimadzu Corporation; product name "Flow Tester CFT-500 type").

[0276] Approximately 2 g of the sample was filled into a capillary rheometer equipped with a die having an inner diameter of 1 mm and a length of 10 mm, and the liquid crystalline polymer was extruded from the nozzle at a heating rate of 4 °C / minute under a load of 9.8 MPa (100 kgf / cm 2 ). The temperature at which the melt viscosity showed 4800 Pa·s (48000 poise) was set as the flow start temperature. The results are shown in Table 1 as "Flow start temperature (°C)".

[0277] [Manufacturing example of liquid crystalline polymer (resin A)]

[0278] In a reactor equipped with a stirring device, a torque meter, a nitrogen inlet tube, a thermometer, and a reflux condenser, 994.5 g (7.2 moles) of p-hydroxybenzoic acid, 446.9 g (2.4 moles) of 4,4'-dihydroxybiphenyl, 365.4 g (2.2 moles) of terephthalic acid, 33.2 g (0.2 mole) of isophthalic acid, 1347.6 g (13.2 moles) of acetic anhydride, and 0.194 g of 1-methylimidazole as a catalyst were added. After stirring at room temperature for 15 minutes to thoroughly displace the inside of the reactor with nitrogen, the temperature was raised while stirring. When the internal temperature reached 145 °C, stirring was carried out for 1 hour while maintaining this temperature.

[0279] Thereafter, while distilling off the by-produced acetic acid and unreacted acetic anhydride, the temperature was raised to 320 °C over 2 hours and 50 minutes, and the time when an increase in torque was confirmed was set as the end of the reaction to obtain a prepolymer. The flow start temperature of the prepolymer was 263 °C.

[0280] The obtained prepolymer was cooled to room temperature (25 °C) and pulverized using a coarse pulverizer to obtain a powder of a liquid crystalline polymer (liquid crystal polyester) (particle size: about 0.1 to 1 mm). Thereafter, it was heated from room temperature (25 °C) to 250 °C over 1 hour under a nitrogen atmosphere, heated from 250 °C to 300 °C over 5 hours, and held at 300 °C for 3 hours to conduct a polymerization reaction in the solid state. The flow start temperature of the obtained liquid crystalline polymer (liquid crystal polyester; resin A) was 361 °C.

[0281] Regarding the proportion of each repeating unit of resin A calculated from the input amount of the raw material monomers, relative to the total amount of all repeating units, Ar 1 The repeating unit (u1) of p-phenylene (i.e., the repeating unit derived from p-hydroxybenzoic acid) was 60 mol%, Ar 2 The repeating unit (u2) of p-phenylene (i.e., the repeating unit derived from terephthalic acid) was 18 mol%, Ar 2 The repeating unit (u2) of m-phenylene (i.e., the repeating unit derived from isophthalic acid) was 2 mol%, Ar 3 The repeating unit (u3) of 4,4'-biphenylene, with X and Y being oxygen atoms (i.e., the repeating unit derived from 4,4'-dihydroxybiphenyl) was 20 mol%.

[0282] [Manufacturing example of liquid crystalline polymer (resin B)]

[0283] In a reactor equipped with a stirring device, a torque meter, a nitrogen inlet tube, a thermometer, and a reflux condenser, 994.5 g (7.2 mol) of p-hydroxybenzoic acid, 446.9 g (2.4 mol) of 4,4'-dihydroxybiphenyl, 299.0 g (1.8 mol) of terephthalic acid, 99.7 g (0.6 mol) of isophthalic acid, and 1347.6 g (13.2 mol) of acetic anhydride were added. After replacing the gas in the reactor with nitrogen, 0.18 g of 1-methylimidazole was added, and while stirring under a nitrogen stream, the temperature was raised from room temperature to 150 °C over 30 minutes and refluxed at 150 °C for 30 minutes.

[0284] Next, while distilling off the by-produced acetic acid and unreacted acetic anhydride, the temperature was raised from 150 °C to 320 °C over 2 hours and 50 minutes. At the moment when an increase in torque was confirmed, the content was taken out of the reactor and cooled to room temperature to obtain a prepolymer as a solid.

[0285] Next, the prepolymer was pulverized using a pulverizer, and the resulting pulverized material was heated from room temperature to 250 °C in 1 hour under a nitrogen atmosphere, heated from 250 °C to 295 °C in 5 hours, and held at 295 °C for 3 hours, thereby performing solid-phase polymerization. The resulting solid-phase polymer was cooled to room temperature to obtain a powdery liquid crystal polyester (L3). The flow start temperature of the obtained liquid crystalline polymer (liquid crystal polyester; resin B) was 327 °C.

[0286] Regarding the proportion of each repeating unit of resin B calculated from the input amount of raw material monomers, relative to the total amount of all repeating units, Ar 1 The repeating unit (u1) of p-phenylene (i.e., the repeating unit derived from p-hydroxybenzoic acid) is 60 mol%, Ar 2 The repeating unit (u2) of p-phenylene (i.e., the repeating unit derived from terephthalic acid) is 15 mol%, Ar 2 The repeating unit (u2) of m-phenylene (i.e., the repeating unit derived from isophthalic acid) is 5 mol%, Ar 3 The repeating unit (u3) of 4,4'-biphenylene, where X and Y are oxygen atoms (i.e., the repeating unit derived from 4,4'-dihydroxybiphenyl) is 20 mol%.

[0287] [Manufacturing Example of Fluororesin]

[0288] [Manufacturing Example of Resin F1]

[0289] Into a 6 L stainless steel autoclave equipped with two stainless steel plate-type stirring blades and a temperature control jacket, 2760 g of deionized water was charged and sealed. After removing the oxygen in the system by repeatedly pressing in and degassing nitrogen, 1.8 g of ethane as a chain transfer agent was pressed in with tetrafluoroethylene (TFE), and the pressure in the tank was set to 0.10 MPa. While stirring at 700 rpm, the temperature in the tank was raised. After the temperature in the tank reached 85 °C, TFE was pressed in again, and the pressure in the tank was adjusted to 0.80 MPa.

[0290] As a polymerization initiator, an aqueous solution obtained by dissolving 700 mg of dibenzoyl peroxide (DSP) in 20 g of deionized water and an aqueous solution obtained by dissolving 700 mg of ammonium persulfate (APS) in 20 g of deionized water were pressed into the tank with TFE. Since the pressure in the tank decreased due to the decomposition of the polymerization initiator, TFE was continuously supplied to maintain the pressure in the tank at 0.80 ± 0.05 MPa. During the polymerization reaction, the temperature in the tank was adjusted to 85 ± 1 °C, and the stirring speed was controlled at 350 rpm.

[0291] Next, at the moment when the consumption of TFE reaches 175 g, the stirring speed is changed to 700 rpm, and the polymerization reaction is further carried out until 525 g of TFE is consumed.

[0292] At the moment when the total consumption of TFE reaches 700 g, the stirring is stopped, and the pressure in the tank is released. The liquid level in the polymerization and the fluororesin in the wet state in the liquid are washed with deionized water and then filtered. The filtered fluororesin is dried in a hot air circulation dryer at 160 °C for 18 hours to obtain a fluororesin (resin F1).

[0293] <Manufacturing Example of Resin F2>

[0294] 21.8 kg of deionized water, 50 g of ammonium carbonate buffer, and a mixture of ammonium perfluoroalkyl (C4 - C 16 ) ethyl sulfonate (average C8) 45 g are added to a 36 L stainless steel autoclave with a stirring blade. The autoclave is sealed, evacuated, and then tetrafluoroethylene (TFE) is blown in three times, and then evacuated again. Ethane is introduced into the autoclave until the pressure rises to 16.9 kPa, and then 98 mL of perfluoro(propyl vinyl ether) (PPVE) and 350 mL of Freon (registered trademark) F - 113 (CCl2FCClF2) are injected into the autoclave. The autoclave is pressurized to 2.1 MPa with TFE, and at the same time, a solution obtained by dissolving 1.5 g of ammonium persulfate (APS) in 500 mL of deionized water is introduced into the autoclave by a pump. After the polymerization starts (the pressure drops by 0.07 MPa), additional PPVE and a solution obtained by dissolving 1.2 g of APS in 1000 mL of deionized water are introduced into the autoclave by a pump at a ratio of 1.10 mL / min and 10 mL / min, respectively, with respect to the polymerization residue. In order to adjust the reaction so that the additional TFE required to keep the pressure constantly at 2.2 MPa is 50 g per minute, the stirring speed of the mixer is adjusted. After adding 7 kg of TFE from the start of the reaction, the supply of TFE and PPVE and the mixer are stopped. The initiator solution (APS) is continuously fed by a pump until the unreacted substances are discarded from the autoclave. The coagulated polymer is taken out of the autoclave, washed with deionized water, and dried at 150 °C to obtain a fluororesin (resin F2).

[0295] <Manufacturing Example of Resin F3>

[0296] Except that the injection amounts of perfluoro(propyl vinyl ether) (PPVE) and Freon (registered trademark) F - 113 (CCl2FCClF2) injected into the autoclave before the start of the reaction are changed to 45 mL of perfluoro(propyl vinyl ether) (PPVE) and 350 mL of Freon (registered trademark) F - 113 (CCl2FCClF2), the resin F3 is manufactured in the same manner as resin F2 to obtain a fluororesin (resin F3).

[0297] <Manufacturing Example of Resin F4>

[0298] Except for changing the injection amounts of perfluoro(propyl vinyl ether) (PPVE) and Freon (registered trademark) F-113 (CCl2FCClF2) injected into the autoclave before the start of the reaction to 75 mL of perfluoro(propyl vinyl ether) (PPVE) and 350 mL of Freon (registered trademark) F-113 (CCl2FCClF2), the resin was manufactured in the same manner as Resin F2 to obtain a fluororesin (Resin F4).

[0299] <Manufacturing Example of Resin F5>

[0300] Except for changing the injection amounts of perfluoro(propyl vinyl ether) (PPVE) and Freon (registered trademark) F-113 (CCl2FCClF2) injected into the autoclave before the start of the reaction to 165 mL of perfluoro(propyl vinyl ether) (PPVE) and 345 mL of Freon (registered trademark) F-113 (CCl2FCClF2), the resin was manufactured in the same manner as Resin F2 to obtain a fluororesin (Resin F5).

[0301] [Physical Property Evaluation of Fluororesin]

[0302] For Resins F1 to F5 obtained through the above manufacturing examples, the CF3 group content, resin decomposition start temperature, and number average molecular weight (Mn) were measured by the method described below. The results are shown in Table 1.

[0303] [Measurement of CF3 Group Content]

[0304] The CF3 group content relative to the CF2 group content in Resins F1 to F5 was calculated as an area percentage from the peak area ICF3 corresponding to the CF3 group and the peak area ICF2 corresponding to the CF2 group measured by 19 19F solid-state NMR, and was obtained by the following formula (f1).

[0305] CF3 group content (%) = {(ICF3 / 3) / (ICF2 / 2)} × 100 (f1)

[0306] The 19 19F solid-state NMR measurement for calculating the CF3 group content was performed by the single-pulse method and measured under the following conditions.

[0307] Measurement device: PS400WB (manufactured by Varian)

[0308] Static magnetic field strength: 9.4 Tesla (resonance frequency: 400 MHz (1H))

[0309] Magic angle spinning: 35 kHz (35,000 revolutions per second)

[0310] Repetition time: 15 s

[0311] Number of accumulations: 128 times

[0312] Temperature: 26 °C

[0313] Chemical shift standard substance: Hexafluorobenzene

[0314] [Measurement of resin decomposition start temperature]

[0315] 20 mg of each of resins F1 to F5 was filled into an aluminum cell. Then, using a thermogravimetric analyzer (product name; TGA-50, manufactured by Shimadzu Corporation), while flowing nitrogen at a rate of 50 mL / min, the temperature at which the weight loss rate reached 0.1% was measured when heating from 25 °C (room temperature) to 800 °C at a heating rate of 10 °C / min, and this temperature was taken as the resin decomposition start temperature.

[0316] [Measurement of number-average molecular weight (Mn)]

[0317] The number-average molecular weight (Mn) of resins F1 to F5 is the number-average molecular weight (Mn) obtained by the method described in J. Appl. Polym. Sci. 1973, 17, 3253. The heat of crystallization (J / g) was determined using a differential scanning calorimeter (product name: DSC-50, manufactured by Shimadzu Corporation), converted to the heat of crystallization (ΔHc; cal / g), and calculated by the following formula (m-1).

[0318] Number-average molecular weight (Mn) = 2.1×10 10 ΔHc -5.16 (m-1)

[0319] Table 1

[0320]

[0321] [Production Example 1 of resin composition]

[0322] (Examples 1 to 4, Comparative Example 1)

[0323] Using the mixing ratios shown in Table 2 below, a liquid crystalline polymer, glass fiber, fluororesin, and pigment were granulated using a twin-screw extruder (manufactured by Ikegai Corporation, PCM-30) at a barrel temperature of 340 °C to obtain resin compositions (granules) for each example.

[0324] [Evaluation 1 of occurrence of die swell]

[0325] In the production examples of the above resin composition, the diameter of the die hole of the above twin-screw extruder was visually compared with the diameter of the cross-section of the resin composition (particles) of each example extruded from the die hole, and the occurrence state of die swell was evaluated according to the following criteria.

[0326] A: The diameter of the die hole is approximately equal to the diameter of the cross-section of the particles.

[0327] B: The diameter of the cross-section of the particles is larger than the diameter of the die hole, causing poor cutting in the subsequent process, i.e., the particle cutting process.

[0328] Table 2

[0329]

[0330] In Table 2, each abbreviation has the following meanings. The values in [] are the contents (mass %).

[0331] Resin A: A liquid crystalline polymer (liquid crystal polyester; Resin A) obtained by the above production method.

[0332] G1: Glass fiber (product name: Milled Fiber EFH75-01, manufactured by Central Glass Co., Ltd., fiber diameter 11 μm, fiber length 75 μm).

[0333] Resins F1 to F5: Fluororesins obtained by the above respective production methods.

[0334] M1: Carbon black (product name: #45LB, manufactured by Mitsubishi Chemical Corporation, primary particle diameter 24 nm, specific surface area 125 m 2 / g, oil absorption 45 mL / 100 g).

[0335] As shown in Table 2, the resin compositions of Examples 1 to 4 containing Resins F1 to F4 with a peak area percentage of the CF3 group content of 0.05% or more had a better inhibitory effect on die swell compared to the resin composition of Comparative Example 1.

[0336] [Evaluation of Thermal Stability]

[0337] <b * Measurement of Rate of Change>

[0338] Using the resin composition of the example, a test piece with a width of 64 mm × a length of 64 mm × a thickness of 3 mm was produced by injection molding. For the produced test piece, using a spectrophotometer (product name: CM-3600d, manufactured by Konica Minolta), the b of the test piece just after production was measured respectively * and the b after heating the test piece at 300 °C for 2 hours.* The change rates are shown in Table 3 respectively.

[0339] Table 3

[0340] Example 1 Example 2 Example 3 Example 4 b* change rate 11.9％ 9.8％ 3.3％ 1.2％

[0341] As shown in Table 3, the b change rate of the molded articles made of the resin compositions of Examples 1 to 4 using Resins F1 to F4 containing a liquid crystalline polymer and having a peak area percentage of the CF3 group content of 0.05% or more * is low, and yellowing is suppressed. From this, it can be confirmed that the molded articles made of the resin compositions of Examples 1 to 4 have high thermal stability.

[0342] In addition, the b change rate of the molded articles made of the resin compositions of Examples 2 to 4 containing Resins F2 to F4 in the examples * is particularly low, and yellowing is suppressed.

[0343] As shown in Tables 2 and 3, it can be confirmed that the resin compositions of the examples have high thermal stability and good suppression effect on die swell.

[0344] [Manufacturing Example 2 of Resin Composition]

[0345] (Examples 5 to 8)

[0346] Using the mixing ratios shown in Table 4 below, a liquid crystalline polymer, a plate-like filler, a fluororesin, and a pigment were granulated using a twin-screw extruder (manufactured by Ikegai Corporation, PCM-30) at a barrel temperature of 340 °C to obtain the resin compositions (granules) of each example.

[0347] [Evaluation 2 of Generation Status of Die Swell]

[0348] By the same method as [Evaluation 1 of Generation Status of Die Swell] above, the generation status of die swell of the resin compositions of Examples 5 to 8 was evaluated.

[0349] Table 4

[0350]

[0351] In Table 4, each abbreviation has the following meanings. The values in [] are the contents (mass %).

[0352] Resin B: A liquid crystalline polymer (liquid crystal polyester; Resin B) obtained by the above manufacturing method

[0353] T1: Talc (product name: MS-KY, manufactured by NIPPON TALC Co., Ltd., median particle size (D50) 21 μm)

[0354] Resins F1 to F4: Fluororesins obtained by the respective manufacturing methods described above

[0355] M2: Titanium yellow (Product name: TY-70S, manufactured by Ishihara Sangyo Co., Ltd., average particle size 1.00 μm)

[0356] M3: Carbon black (Product name: BP4350, manufactured by Cabot Corporation, oil absorption 66 - 77 mL / 100 g)

[0357] M4: Titanium oxide (Product name: CR-60, manufactured by Ishihara Sangyo Co., Ltd., average particle size 0.21 μm)

[0358] As shown in Table 4, regarding the resin compositions of Examples 5 to 8, the suppression effect of die swell is also good in the same manner as the resin compositions of Examples 1 to 4 described above.

[0359] The preferred embodiments of the present invention have been described above, but the present invention is not limited to these embodiments. Additions, omissions, substitutions, and other modifications can be made without departing from the gist of the present invention. The present invention is not limited by the above description, but only by the appended claims.

[0360] Explanation of symbols

[0361] Spool for 1A coil

[0362] 2 Main body

[0363] 3 Flange part

Claims

1. A resin composition containing a liquid crystalline polymer and a fluororesin, wherein the peak area percentage of the CF3 group content relative to the CF2 group content in the fluororesin determined by the following [CF3 group content determination method] is 0.05% or more, and the number average molecular weight of the fluororesin is 100 to 5000000, [CF3 group content determination method] The content of CF3 groups relative to the content of CF2 groups in the fluororesin is calculated as an area percentage from the peak area ICF3 corresponding to CF3 groups and the peak area ICF2 corresponding to CF2 groups measured by 19 solid-state 19F NMR, and is obtained by the following formula (f1). CF3 group content (%) = {(ICF3 / 3) / (ICF2 / 2)} × 100 (f1).

2. The resin composition according to claim 1, wherein, Further contains glass fiber.

3. The resin composition according to claim 1 or 2, wherein, Further contains a plate-like filler.

4. The resin composition according to claim 1 or 2, wherein, The resin decomposition start temperature of the fluororesin is 473 °C or higher.

5. The resin composition according to claim 1 or 2, wherein, The number average molecular weight of the fluororesin is 300 to 30000.

6. The resin composition according to claim 1 or 2, wherein The peak area percentage of the CF3 group content relative to the CF2 group content in the fluororesin determined by the [CF3 group content determination method] is 0.05% or more and 0.20% or less.

7. A molded article made using the resin composition according to any one of claims 1 to 6.

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