COMPOSITION OF FLUORINATED COPOLYMER

Abstract

A fluorinated copolymer composition comprising a thermoplastic resin A and a fluorinated elastomer B dispersed within the thermoplastic resin A. The thermoplastic resin A has a shear strength (tA) greater than 0.11 MPa when measured with a capillary rheometer at a shear rate of 243 s⁻¹ and 360°C in accordance with ASTM D3835. The fluorinated elastomer B dispersed within the thermoplastic resin A has an average dispersed particle size of less than 50 µm.

Description

A fluorinated copolymer composition includes a thermoplastic resin A and a fluorinated elastomer B dispersed within thermoplastic resin A. Thermoplastic resin A has a shear stress (TA) of greater than 0.11 MPa when measured with a capillary rheometer at a shear rate of 243 sec -1 and at 360Á°C ¡n accordance with ASTM D3835. Fluorinated elastomer B dispersed within thermoplastic resin A has an average dispersed particle size of less than 50 Mm. COMPOSICIÓN DE COPOLÍMERO FLUORADO Referencia cruzada a solicitudes relacionadas This application claims priority from U.S. Patent Application No. 16 / 169,247 filed on October 24, 2018, which is a continuation of PCT Application No. PCT / JP2017 / 016436, filed on April 25, 2017, which is based on and claims the benefit of priority from Japanese Patent Application No. 2016-91886 filed on April 28, 2016, and Japanese Patent Application No. 2016-172023 filed on September 2, 2016. The contents of each of these applications are incorporated herein by reference in their entirety. Field of invention The following description refers to a fluorinated copolymer composition. Background of the invention Engineering plastics such as polyether ketone, polyether sulfone, and polyether ketone are excellent in terms of heat resistance and mechanical properties, and are therefore widely used in various injection-molded products. However, these engineering plastics have limitations in impact resistance at ordinary or low temperatures, and improvements to these properties are desirable. Brief description of the invention and advantages This description provides a fluorinated copolymer composition comprising a thermoplastic resin A and a fluorinated elastomer B dispersed within the thermoplastic resin A. The thermoplastic resin A has a shear strength (ta) greater than 0.11 MPa when measured with a capillary rheometer at a shear rate of 243 s⁻¹ and at 360°C in accordance with ASTM D3835. The fluorinated elastomer B dispersed within the thermoplastic resin A has an average dispersed particle size of less than 50 µm. The present invention also provides a method for forming the fluorinated copolymer composition. The method includes melt-kneading the thermoplastic resin A with the fluorinated elastomer B such that the fluorinated elastomer B is dispersed within the thermoplastic resin A with an average dispersed particle size of less than 50 µm. The thermoplastic resin A has a shear strength (ta) greater than 0.11 MPa when measured with a capillary rheometer at a shear rate of 243 s⁻¹ and at 360°C in accordance with ASTM D3835. The combination of the thermoplastic resin with a shear strength greater than 0.11 MPa and the average size of the dispersed particles of the fluorinated elastomer B results in a synergistic fluorinated copolymer composition that has excellent impact resistance, while maintaining the desired heat resistance, mechanical properties and moldability. Detailed description of the invention The fluorinated copolymer composition described herein includes a thermoplastic resin A and a fluorinated elastomer B. The volume ratio (A:B) of the thermoplastic resin A to the fluorinated elastomer B contained in the fluorinated copolymer composition may be from 99:1 to I / UU4 / 10 55:45. In certain embodiments, the volume ratio (A:B) is 97:3 to 55:45, 95:5 to 57:43, 95:5 to 60:40, 93:7 to 60:40, or 90:10 to 65:35. In one embodiment, the volume ratio (A:B) of thermoplastic resin A to fluorinated elastomer B is 90:10 to 65:35. The volume ratio (A:B) is obtained using the following procedure. Each mass (g) of thermoplastic resin A and fluorinated elastomer B to be melt-kneaded (introduced into a mixer) during the production of the fluorinated copolymer composition is divided by its specific gravity (g / cm³) to obtain each volume (cm³). From these respective volumes (cm³) of thermoplastic resin A and fluorinated elastomer B, the aforementioned volume ratio (A:B) is calculated. Specific gravity is a value at 23°C. The specific gravity of each thermoplastic resin A and fluorinated elastomer B can be measured using a water displacement (suspension) method. The total volume of thermoplastic resin A and fluorinated elastomer B in the fluorinated copolymer composition is typically at least 50%. In certain embodiments, the total volume of thermoplastic resin A and fluorinated elastomer B in the fluorinated copolymer composition is 60 to 99% or 70 to 97% of the volume of the fluorinated copolymer composition. The optional components, which collectively make up the total volume of the fluorinated copolymer composition in combination with thermoplastic resin A and fluorinated elastomer B, are described below. When the total volume of thermoplastic resin A and fluorinated elastomer B in the fluorinated copolymer composition is at least 50%, excellent mechanical properties such as flexibility and strength are achieved. When the total volume of thermoplastic resin A and fluorinated elastomer B in the fluorinated copolymer composition is at or near the upper range above (e.g., 99%), excellent heat resistance and excellent mechanical properties such as flexibility and strength are achieved. The fluorinated copolymer composition includes fluorinated elastomer B dispersed within thermoplastic resin A. The average particle size of the dispersed fluorinated elastomer B (also referred to as the average dispersed particle size) within thermoplastic resin A is less than 50 µm. In certain embodiments, the average dispersed particle size of fluorinated elastomer B is less than 40, less than 30, less than 20, or less than 10 µm. Alternatively, the average dispersed particle size is 0.1 to 50 µm. In certain embodiments, the average dispersed particle size is 0.1 to 40, 0.1 to 30, 0.1 to 20, 0.1 to 15, 0.1 to 10, 0.1 to 7, 0.1 to 6, or 0.1 to 3 µm. In one embodiment, the average size of dispersed particles of fluorinated elastomer B is 0.1 to 15 µm. In another embodiment, the average size of dispersed particles of fluorinated elastomer B is 0.1 to 7 µm. In another embodiment, the average size of dispersed particles of fluorinated elastomer B is 0.1 to 6 µm.In another modality, the average size of dispersed particles of fluorinated elastomer B is 0.1 to 3 pm. Furthermore, since the average size of the dispersed particles is 0.1 to 50 pm, it is generally not necessary to shear the fluorinated elastomer B more than required in the melt-kneading step as described below. In other words, the average size of IVIA / a / ¿U¿ Ί / UU4 / 10 dispersed particles of 0.1 to 50 pm retain the molecular structure while the fluorinated elastomer B is dispersed in the thermoplastic resin A. Thus, by dispersing it in the thermoplastic resin A while ensuring the flexibility of the fluorinated elastomer B, it is possible to impart to the fluorinated copolymer composition an impact resistance that was insufficient with the thermoplastic resin A alone, and thus produce the fluorinated copolymer composition that has improved impact resistance. The average size of dispersed particles of fluorinated elastomer B is calculated by randomly selecting 100 particles and measuring each diameter using scanning electron microscopy (SEM). The average diameter of the 100 randomly selected particles is the calculated average size of dispersed particles of fluorinated elastomer B. While not tied to any particular theory, although not required, it is believed that a consistent dispersion of fluorinated elastomer B within thermoplastic resin A is obtained by selecting thermoplastic resin A and fluorinated elastomer B such that the viscosity ratio of thermoplastic resin A to fluorinated elastomer B is greater than 0.35 when viscosity is measured with a capillary rheometer at a shear rate of 12.1 sec and 360°C in accordance with ASTM D3835. In other words, when the combination of the particular thermoplastic resin A and fluorinated elastomer B has a viscosity ratio greater than 0.35, a consistent dispersion of fluorinated elastomer B, having an average dispersed particle size of less than 50 µm, is achieved within the thermoplastic resin A. Those skilled in the art will appreciate that a consistent dispersion is beneficial for mechanical properties, such as impact resistance. In certain embodiments, the viscosity ratio of thermoplastic resin A to fluorinated elastomer B is greater than 0.5, 0.7, 0.9, 1.1, 1.2, 1.3, 1.5, or 1.7. In other embodiments, the viscosity ratio of thermoplastic resin A to fluorinated elastomer B is 0.35 to 1.7, 0.5 to 1.5, 0.7 to 1.3, 0.9 to 1.3, or 1.1 to 1.3. In certain embodiments, the viscosity ratio of thermoplastic resin A to fluorinated elastomer B is 0.35 to 1.7, and the average dispersed particle size of fluorinated elastomer B is 0.1 to 50 µm. In other embodiments, the viscosity ratio of thermoplastic resin A to fluorinated elastomer B is 1.1 to 1.3 and the average size of dispersed particles of fluorinated elastomer B is 0.1 to 15 pm or 0.1 to 7 pm. Although not required, the flexural modulus of the fluorinated copolymer composition is typically 1,000 to 3,700 MPa. Alternatively, the flexural modulus of the fluorinated copolymer composition can be 1,300 to 3,500 MPa, 1,500 to 3,400 MPa, or 1,700 to 3,300 MPa. When the fluorinated copolymer composition has a flexural modulus of 1,000 to 3,700 MPa, the fluorinated elastomer B in the fluorinated copolymer composition is either not crosslinked or substantially not crosslinked, despite the fact that fluorinated elastomer B may be capable of crosslinking. Therefore, in forms where the flexural modulus of the fluorinated copolymer composition is typically 1,000 to 3,700 MPa, the fluorinated copolymer composition is commonly formed in the absence of a crosslinking agent or co-crosslinking agent. The flexural modulus of the composition of IVIA / a / ¿U¿ Ί / UU4 / 10 fluorinated copolymer is measured in accordance with ASTM D790. In addition to the excellent flexural modulus of the fluorinated copolymer composition, it can also exhibit excellent tensile elongation. Specifically, the tensile elongation of the fluorinated copolymer composition can exceed 120% when measured according to ASTM D638-14 at 200°C. In certain formulations, the tensile elongation can exceed 140%, 160%, 180%, or even 200%. This excellent tensile elongation makes the fluorinated copolymer composition suitable for use in a wide variety of applications (e.g., from aerospace to consumer electronics, and automotive to household goods), which are described later. In certain forms, the fluorinated copolymer composition satisfies the following formula. CR1 / 2-B / CRi / 2-a < 0.9, where CR1 / 2-B is the time (min) to reach the maximum of the exothermic peak derived from the crystallization of fluorinated elastomer B under isothermal control at 315°C in a nitrogen atmosphere. And where CR1 / 2A is the time (minutes) to reach the maximum of the exothermic peak derived from the crystallization of thermoplastic resin A under isothermal control at 315°C in a nitrogen atmosphere. (Thermoplastic resin A) Thermoplastic resin A is at least one type of melt-moldable heat-resistant thermoplastic resin selected from the following Group A. Group A: a polyarylate, a polyethersulfone, a polyaryl sulfone, an aromatic polyamide, an aromatic polyether amide, an aromatic polyether imide, a polyphenylene sulfide, a polyaryl ether ketone, a polyamide imide, and a liquid crystal polyester. Thermoplastic resin A can consist of one, two, or more types of thermoplastic resins. In other words, thermoplastic resin A can include one, two, three, four, etc., thermoplastic resins, and each included thermoplastic resin is collectively referred to as thermoplastic resin A. Typically, thermoplastic resin A includes only one type of thermoplastic resin. Thermoplastic resin A is typically at least one type of heat-resistant thermoplastic resin selected from the group consisting of a polyaryl ether ketone (PAEK), a polyethersulfone (RES), an aromatic amide polyether, and a polyaryl sulfone. As the polyaryl ether ketone, a polyether ketone (PEK), a polyether ether ketone (PEEK), or a polyether ketone ketone (PEKK) is preferred. In some embodiments, thermoplastic resin A is PAEK. In other embodiments, thermoplastic resin A is PEEK. In still other embodiments, thermoplastic resin A is PES. In one embodiment, thermoplastic resin A is a combination of PEEK, PAEK, and PES. The melting point of thermoplastic resin A is typically 200 to 430°C. Alternatively, the melting point of thermoplastic resin A is 250 to 400°C, or 280 to 380°C. When the melting point is at least above 200°C, it is typically possible to maintain excellent heat resistance exhibited by the fluorinated copolymer composition. IVIA / a / ¿U¿ Ί / UU4 / 10 When the melting point is at most 430°C, it is typically possible to suppress the deterioration of physical properties due to the thermal decomposition of the fluorinated elastomer B during melt kneading. It is also possible to maintain the characteristics of the fluorinated elastomer such as flexibility, impact resistance, chemical resistance, etc. The melt flow rate (MFR) of thermoplastic resin A is typically 0.1 to 300 g / 10 min. Alternatively, the MFR can be 1 to 100 g / 10 min or 3 to 70 g / 10 min. When the melt flow rate (MFR) is at least 0.1 g / 10 min, a melt-moldable composition with a smooth appearance can typically be obtained. When the melt flow rate (MFR) is at most 300 g / 10 min, the dispersibility of the thermoplastic resin A and fluorinated elastomer B in the composition will be good, resulting in typically excellent mechanical properties and heat resistance. The MFR is measured in accordance with ASTM D3307, where the mass (g) of the resin that flows in 10 minutes from a nozzle of a diameter of 2 mm and a length of 8 mm is measured under a load of 49 N (5 kg) at 372°C and the value obtained is adopted as MFR (g / 10 minutes). As thermoplastic resin A, a commercially available heat-resistant thermoplastic resin can be used, or it can be produced from various raw materials using known methods. Although thermoplastic resin A can include a wide variety of polymers, certain polymers are unsuitable for use as thermoplastic resin A. In particular, the thermoplastic resin A described herein requires that it have a shear strength (ta) greater than 0.11 MPa when measured with a capillary rheometer at a shear rate of 243 s⁻¹ and at 360°C, in accordance with ASTM D3835. While not tied to any particular theory, it is believed that thermoplastic resin A with a shear strength greater than 0.11 MPa significantly improves the impact strength of the fluorinated copolymer composition, particularly when the fluorinated elastomer B is dispersed within the thermoplastic resin A at an average dispersed particle size of less than 50 µm. In other words, as described above, PAEK and / or PEEK are suitable and typical thermoplastic resin A; however, not all forms or grades of PAEK and PEEK are suitable.For example, PAEK grades with a shear strength greater than 0.11 MPa (measured according to the procedure described above) are unsuitable because they would result in a conventional fluorinated copolymer composition with lower impact strength. Shear strength is believed to be a critical property of thermoplastic resin A, directly correlating with the impact strength of the fluorinated copolymer composition when the average dispersed particle size of fluorinated elastomer B is less than 50 µm. In certain embodiments, thermoplastic resin A has a shear strength of 0.11 MPa to 0.4 MPa. Alternatively, thermoplastic resin A may have a shear strength of 0.11 to 0.4, 0.13 to 0.4, 0.15 to 0.35, 0.2 to 0.35, 0.2 to 0.3, 0.23 to 0.3, 0.26 to 0.3, or approximately 0.27 MPa. IVIA / a / ¿U¿ Ί / UU4 / 10 In certain embodiments, the thermoplastic resin A may have a shear strength of 0.11 to 0.4 MPa or 0.2 to 0.3 MPa, and the average dispersed particle size of the fluorinated elastomer B is 0.1 to 15 µm or 0.1 to 7 µm. In these embodiments, the thermoplastic resin A may be PEEK or PAEK. Furthermore, in these embodiments, the viscosity ratio of the thermoplastic resin A to the fluorinated elastomer B may be 0.35 to 1.7. The fluorinated copolymer composition of each of these embodiments exhibits excellent impact resistance. In these embodiments, the ratio of the shear strength of the thermoplastic resin A to the shear strength of the fluorinated elastomer B may be greater than 0.7. Alternatively, the ratio of the shear strength of the thermoplastic resin A to the shear strength of the fluorinated elastomer B may be 1.4 to 2.3. (Fluorinated elastomer B) Fluorinated elastomer B is a fluorinated elastic copolymer comprising units derived from at least one type of monomer (hereinafter also referred to as the monomer (MB1)) selected from the group consisting of tetrafluoroethylene (TFE), hexafluoropropylene (HFP), vinylidene fluoride (VdF), and chlorotrifluoroethylene (CTFE). The term "units derived from a monomer" means units formed by the polymerization of the monomer. These units may be formed directly by the polymerization reaction of the monomer or may be converted to another structure by treatment of the polymer or unit. Fluorinated elastomer B can consist of one type of fluorinated elastomer, or two or more types. In other words, fluorinated elastomer B can include one, two, three, or four fluorinated elastomers, and each included fluorinated elastomer is collectively referred to as fluorinated elastomer B. Typically, fluorinated elastomer B includes only one type of fluorinated elastomer. The fluorinated elastomer B may be a fluorinated elastic copolymer composed solely of two or three types of units selected from the group consisting of TFE-based units (hereafter also referred to as TFE units; the same applies to the other units), HFP units, VdF units, and CTFE units, or it may be a fluorinated elastic copolymer composed of at least one type of units based on the monomer (MB1) and the following monomer (MB2) copolymerizable with the monomer (MB1). The monomer (MB2) is at least one type of monomer selected from the group consisting of ethylene (E), propylene (P), a perfluoro(alkylvinyl ether) (PAVE), vinyl fluoride (VF), 1,2-difluoroethylene (DiFE), 1,1,2-trifluoroethylene (TrFE), 3,3,3-trifluoro-1-propylene (TFP), 1,3,3,3-tetrafluoropropylene, and 2,3,3,3-tetrafluoropropylene. Here, PAVE is a compound represented by the following formula (I), and specifically, perfluoro(methyl vinyl ether) (PMVE), perfluoro(ethyl vinyl ether) (PEVE), perfluoro(propyl vinyl ether) (PPVE) or perfluoro(butyl vinyl ether) (PBVE) can be used. CF2=CF(ORf) (I) where RF is a linear or branched C1-8 perfluoroalkyl group. Fluorinated elastomer B may have at least one type of unit derived from another monomer IVIA / a / ¿U¿ Ί / UU4 / 10 (hereinafter also referred to as the monomer (MB3)) distinct from the monomer (MB1) and the monomer (MB2), which is copolymerizable with the monomer (MB1), so that the copolymer becomes an elastic copolymer. In all units constituting fluorinated elastomer B, the units derived from the monomer (MB3) are typically included in an amount not exceeding 20 mol%. Alternatively, the amount of units included in fluorinated elastomer B derived from the monomer (MB3) is at most 5 mol. Of course, fluorinated elastomer B may be free of (i.e., not include) any units derived from the monomer (MB3). In one embodiment, fluorinated elastomer B includes only units derived from monomers (MB1) and (MB2) and, therefore, does not include units derived from the monomer (MB3). Typically, 100% by mole of all units constituting fluorinated elastomer B are composed of two or three types of units derived from the monomer (MB1), or are composed of at least one type of unit derived from the monomer (MB1) and at least one type of unit derived from the monomer (MB2). However, the presence of units other than the monomers (MB1) and (MB2) as impurities, etc., is permitted. The fluorinated elastomer B can be a copolymer containing TFE / P (i.e., a copolymer comprising TFE units and P units; here, the ratio of the total of the respective units connected by 7, i.e., in the case of a copolymer containing TFE / P, the total of TFE units and P units, which occupy the total of all units, is typically at least 50% by moles; the same applies to other containing copolymers), a copolymer containing HFP / VdF, or a copolymer containing TFE / PAVE. Typically, a TFE / PAVE copolymer does not include a copolymer that, even if it contains TFE and PAVE units, also contains P or VdF units. Similarly, a copolymer containing HFP / VdF typically does not include a copolymer that, even if it contains HFP and VdF units, also contains P units. The copolymer containing TFE / P may be TFE / P (i.e., a copolymer comprising TFE units and P units; the same applies to others), TFE / P / VF, TFE / P / VdF, TFE / P / E, TFE / P / TFP, TFE / P / PAVE, TFE / P / 1,3,3,3-tetrafluoropropene, TFE / P / 2,3,3,3-tetrafluoropropene, TFE / P / TrFE, TFE / P / DIFE, TFE / P / VdF / TFP, or TFE / P / VdF / PAVE. In one embodiment, the copolymer containing TFE / P may be TFE / P (i.e., it does not include any units other than TFE and P). The copolymer containing HFP / VdF may be HFP / VdF, TFE / VdF / HFP, TFE / VdF / HFP / TFP, TFE / VdF / HFP / PAVE, VdF / HFP / TFP, or VdF / HFP / PAVE. In one embodiment, the copolymer containing HFP / VdF is HFP / VdF. The copolymer containing TFE / PAVE may be TFE / PAVE, TFE / PMVE, or TFE / PMVE / PPVE. In one embodiment, the copolymer containing TFE / PAVE is TFE / PAVE. As fluorinated elastomer B, in addition to the TFE / P-containing copolymer described above, HFP / VdF-containing copolymer and TFE / PAVE-containing copolymer, TFENdF / 2,3,3,3-tetrafluoropropene, VdF / PAVE, VdF / 2,3,3,3-tetrafluoropropene, or E / HFP can be used. ML / 3 / ZUZ Ί / UU4 / 10 The fluorinated elastomers B described above typically include at least one copolymer containing TFE / P, one containing HFP / VdF, and one containing TFE / PAVE. In one embodiment, the fluorinated elastomer B is selected as TFE / P due to its excellent thermal stability during melt kneading, its stable transport properties at the time of melt kneading, and its ability to prevent discoloration and foaming during molding. The compositions of these elastomers are preferably within the following ranges, from the point of view of easily contributing to the flexibility of the fluorinated copolymer composition. The TFE / P ratio (i.e., the molar ratio of TFE units to P units; the following ratios are also molar ratios) is typically 30-80:70-20. Alternatively, the ratio of TFE units to P units may be 40-70:60-30 or 60-50:40-50. In TFE / P / VF, the TFE:P:VF ratio is typically 30-60:60-20:0.05-40 or 30-60:60-20:0.05-40. In TFE / P / E, the TFE:P:E ratio is typically 20-60:70-30:0.05-40. In TFE / P / TFP, the TFE:P:TFP ratio is typically 30-60:60-30:0.05-20. In TFE / P / PAVE, the TFE:P:PAVE ratio is typically 4070:60-29.95:0.05-20. In TFE / P / 1,3,3,3-tetrafluoropropene, the TFE:P:1,3,3,3-tetrafluoropropene ratio is typically 30-60:60-20:0.05-40. In TFE / P / 2,3,3,3-tetrafluoropropene, the TFE:P:2,3,3,3-tetrafluoropropene ratio is typically 30-60:60-20:0.05-40. In TFE / P / TrFE, the TFE / P / TrFE ratio is typically 30-60:60-20:0.05-40. In TFE / P / TrFE, the TFE / P / TrFE ratio is typically 30-60:60-20:0.05-40.In TFE / P / VdF / TFP, the TFE:P:VdF:TFP ratio is typically 30-60:60-20:0.05-40:0.05-20. In TFE / P / VdF / PAVE, the TFE:P:VdF:PAVE ratio is typically 30-70:60-20:0.05-40:0.05-20. In HFP / VdF, the HFP:VdF ratio is typically 99-5:1-95. In TFE / VdF / HFP, the TFE:VdF:HFP ratio is typically 20-40:1-40:20-40. In TFE / VdF / HFP / TFP, the TFE:VdF:HFP:TFP ratio is typically 30-60:0.05-40:60-20:0.05-20. In TFE / VdF / HFP / PAVE, the TFE:VdF:HFP:PAVE ratio is typically 30-70:60-20:0.05-40:0.05-20. In VdF / HFP / TFP, the VdF:HFP:TFP ratio is typically 1-90:95-5:0.05-20. In VdF / HFP / PAVE, the VdF:HFP:PAVE ratio is typically 20-90:9.95-70:0.05-20. In TFE / PAVE, the TFE:PAVE ratio is typically 40-70:60-30. In TFE / PMVE, the TFE:PMVE:PPVE ratio is typically 40-70:60-30. In TFE / PMVE / PPVE, the TFE:PMVE:PPVE ratio is typically 40-70:3-57:3-57. In TFE / VdF / 2,3,3,3-tetrafluoropropene, the ratio TFE:VdF:2,3,3,3-tetrafluoropropene is typically 1-30:30-90:5-60.In VdF / PAVE, the VdF:PAVE ratio is typically 3-95:97-5. In VdF / 2,3,3,3-tetrafluoropropene, the VdF:2,3,3,3-tetrafluoropropene ratio is typically 30-95:70-5. In E / HFP, the E:HFP ratio is typically 40-60:60-40. The fluorine content in fluorinated elastomer B is typically 50 to 74% by mass, or 55 to 70%, or 57 to 60% by mass. When fluorinated elastomer B is TFE / P, the fluorine content is typically 66 to 71% by mass. When fluorinated elastomer B is HFP / VdF, the fluorine content is typically 66 to 70% by mass. When the fluorine content of fluorinated elastomer B is at least 50% by mass, excellent heat and chemical resistance will be achieved. When the content is at most 74% by mass, the flexibility of the fluorinated copolymer composition will increase. The fluorine content represents the proportion of the mass of fluorine atoms to the total mass of all atoms that constitute the fluorinated elastomer B. The analysis of the fluorine content is carried out by obtaining the molar proportions of the respective units in the fluorinated copolymer, from molten NMR measurements and measurement of the total fluorine content. The number-average molecular weight of fluorinated elastomer B is typically 10,000 to 1,500,000, 20,000 to 1,000,000, 20,000 to 800,000, or 50,000 to 600,000. When the number-average molecular weight is at least the lower limit above, the mechanical strength of the molded body will be good. When the number-average molecular weight is at most the upper limit above, fluorinated elastomer B will have high fluidity, resulting in good dispersion in thermoplastic resin A and increased flexibility in the fluorinated copolymer composition. The Mooney viscosity (ML1+10, 121 °C) of fluorinated elastomer B is typically 20 to 200, 30 to 150 or 40 to 120. Mooney viscosity is an index of molecular weight and can be measured according to JIS K6300-1:2000. The higher this value, the higher the molecular weight; the lower the value, the lower the molecular weight. When the Mooney viscosity falls within the range of 20 to 200, the fluorinated copolymer composition will have excellent mechanical properties and moldability. As an alternative measure of viscosity, fluorinated elastomer B can also have a viscosity greater than 2,000 Pa s when measured with a capillary rheometer at a shear rate of 12.1 sec-1 and at 360°C in accordance with ASTM D3835. The number-average particle diameter of fluorinated elastomer B before melt kneading is typically 10 mm at most. Particles with this diameter may also be referred to as crumbs. Alternatively, the number-average particle diameter of fluorinated elastomer B before melt kneading is either 8 mm or 6 mm at most. When it falls within the above range, screw conveyability during melt kneading will be good. The number-average particle diameter of fluorinated elastomer (B) before melt kneading is obtained by randomly selecting 100 particles using an optical microscope, measuring their particle diameters, and calculating an average value. In certain embodiments, the fluorinated elastomer B is TFE / P. The thermoplastic resin A may have a shear strength of 0.11 to 0.4 MPa or 0.2 to 0.3 MPa, and the average dispersed particle size of the fluorinated elastomer B is 0.1 to 15 µm or 0.1 to 7 µm. In these embodiments, the thermoplastic resin A may be PAEK or PEEK. Furthermore, in these embodiments, the viscosity ratio of thermoplastic resin A to fluorinated elastomer B may be 0.35 to 1.7. The fluorinated copolymer composition of each of these embodiments exhibits excellent impact resistance. In certain embodiments, the ratio of the shear strength of the thermoplastic resin A to the shear strength of the fluorinated elastomer B may be greater than 0.7. Alternatively, the ratio of IVIA / a / ¿U¿ Ί / UU4 / 10 The shear strength of the thermoplastic resin A to the shear strength of the fluorinated elastomer B may be greater than 0.8, 1.0, 1.2, or 1.4. Alternatively, the ratio may be 0.7 to 2.3, 0.9 to 2.3, 1.1 to 2.3, 1.4 to 2.3, or 1.6 to 2.0. (Preparation of Fluorinated Elastomer B) Fluorinated elastomer B can be produced by copolymerizing at least one type of monomer (MB1) and, as required, one or both of monomer (MB2) and monomer (MB3). The polymerization method can be an emulsion polymerization method, a solution polymerization method, a suspension polymerization method, a bulk polymerization method, etc. An emulsion polymerization method is typically used to polymerize monomers in the presence of an aqueous medium and an emulsifier, as this makes it easy to adjust the number-average molecular weight of the fluorinated copolymer or the copolymer composition, resulting in excellent productivity. In the emulsion polymerization method, a latex can be obtained from an elastomer by polymerizing a monomeric component comprising the monomers described above in the presence of an aqueous medium, an emulsifier, and a radical polymerization initiator. A pH adjusting agent can be added to the emulsion polymerization step. (Other components) The fluorinated copolymer composition may optionally include, in addition to thermoplastic resin A and fluorinated elastomer B, other components. Other components may be additives such as a filler, a plasticizer, a flame retardant, etc. One of these additives may be used alone, or two or more of them may be used in combination. If other components are included in the fluorinated copolymer composition, the total volume of those other components is typically at most 50% of the volume of the fluorinated copolymer composition. Alternatively, the total volumes of the other components may be from 1 to 40% by volume or from 3 to 30% by volume. Fillers, like other components, can be inorganic fillers, etc. Inorganic fillers can be CaCOs, S1O2, T1O2, BaSO4, ZnO, Al(OH)3, Mg(OH)2, talc, mica, carbon black, white carbon, clay, carbon nanotubes, glass fibers, carbon fibers, etc. Carbon black can be used without limitation as long as it is used as a filler for fluorocarbon rubber. Specific examples include furnace black, acetylene black, thermal black, channel black, graphite, etc. When other components include carbon black, it is typically furnace black. Furnace black includes HAF-LS carbon, HAF carbon, HAF-HS carbon, FEF carbon, GPF carbon, APF carbon, SRF-LM carbon, SRF-HM carbon, MT carbon, etc., and among these, MT carbon is typically used. In a case where the fluorinated copolymer composition contains carbon black, the MA / a / ZUZ 1 / UU4 / 10 Carbon black content is typically 1 to 50 parts by mass or 3 to 20 parts by mass, based on 100 parts by mass of fluorinated elastomer B. When the carbon black content is at least 1 part by mass, although not required, a crosslinked product obtained by crosslinking the fluorinated copolymer composition will have excellent strength due to the reinforcing effect of the carbon black. Furthermore, when the carbon black content is at most 50 parts by mass, the elongation of the crosslinked product will also be excellent. Therefore, when the carbon black content is 1 to 50 parts by mass, the balance between strength and elongation of the crosslinked product will be good. In a case where the fluorinated copolymer composition contains a filler other than carbon black, the content of the filler is typically 5 to 200 parts by mass, or 10 to 100 parts by mass, based on 100 parts by mass of fluorinated elastomer B. As a filler, at least one type may be used individually, and carbon black and another filler may be used in combination. In the case of a molded product containing carbon black and another filler, the filler content is typically 1 to 100 parts by mass, or 3 to 50 parts by mass, based on 100 parts by mass of fluorinated elastomer B. Plasticizers and flame retardants, like other components, are not particularly limited, and known plasticizers and flame retardants can be used. As plasticizers, italic acid esters, adipic acid esters, etc., can be used. As flame retardants, aluminum hydroxide, magnesium hydroxide, magnesium carbonate, antimony trioxide, sodium antimonate, antimony pentoxide, phosphazene compounds, phosphoric acid esters, ammonium polyphosphate, melamine polyphosphate, melam melem, red phosphorus, molybdenum compounds, borate compounds, PTFE, etc., are preferred, as are antimony trioxide; phosphoric acid esters such as triphenyl phosphate, tricresyl phosphate, trixyleneyl phosphate, cresylphenyl phosphate, 2-ethylhexyl diphenyl phosphate, and other aromatic phosphoric acid esters; and PTFE is an anti-drip agent that forms a fibrillar structure in the resin. [Method for producing a fluorinated copolymer composition] This description also provides a method for producing the fluorinated copolymer composition. The method includes a melt-kneading step of the thermoplastic resin A and the fluorinated elastomer B (hereafter referred to as the melt-kneading step). In the case of incorporating other components into the fluorinated copolymer composition, the other components can be added in the melt kneading step of the thermoplastic resin A and fluorinated elastomer B, or they can be added after the melt kneading of the thermoplastic resin A and fluorinated elastomer B. In the melt kneading step, the melt kneading is performed by adjusting the volume ratio (A:B) of the thermoplastic resin A to the fluorinated elastomer B to be from 99:1 to 55:45. This volume ratio (A:B) can alternatively be from 95:5 to 57:43, from 95:5 to 60:40, from 93:7 to 60:40, or from 90:10 to 65:35. When the volume ratio (A:B) is within 99:1 to 55:45, there typically will be no IVIA / a / ¿U¿ Ί / UU4 / 10 apparent visual roughness in the strand that can be obtained at the time of melt kneading and as a result, the pellets obtainable from melt kneading will be excellent in melt moldability. Furthermore, when thermoplastic resin A is contained within the aforementioned volume range, excellent mechanical and heat resistance properties can be achieved. When fluorinated elastomer B is contained within the same volume range, excellent flexibility can be obtained, and surface roughness of the molded product can be avoided. As equipment for the melt-kneading step, any known device with a melt-kneading function can be used. For example, a single-screw extruder or a twin-screw extruder equipped with a screw that has a high-effect kneading function can be used. A Laboplastmill mixer (manufactured by Toyo Seiki Seisakusho, Ltd.) is an example. Regarding the method of supplying thermoplastic resin A and fluorinated elastomer B to the apparatus having a melt kneading function, the thermoplastic resin A and fluorinated elastomer B can be premixed, and the resulting mixture can be supplied to the apparatus having a melt kneading function, or the thermoplastic resin A and fluorinated elastomer B can be supplied separately to the apparatus having a melt kneading function. Furthermore, if other components are incorporated as optional components in the fluorinated copolymer composition, these components can be premixed with thermoplastic resin A and fluorinated elastomer B, and the mixture can be supplied to the apparatus having a melt-kneading function. Alternatively, these components can be supplied to the apparatus separately from thermoplastic resin A and fluorinated elastomer B. Additionally, as described above, these components can be added after thermoplastic resin A and fluorinated elastomer B have been melt-kneaded. The kneading temperature in the melt kneading step can be selected based on the particular type of thermoplastic resin A and fluorinated elastomer B. Typically, the kneading temperature is 220 to 480°C, 280 to 450°C, 290 to 420°C, or 300 to 400°C. The extrusion shear rate in the melt kneading step is selected based on the molten viscosity of the components to be melt kneaded at the kneading temperature of the preceding melt kneading step. Typically, the extrusion shear rate in the melt kneading step is 3 to 2500 s⁻¹, 10 to 2000 s⁻¹, or 15 to 1500 s⁻¹. In the melt kneading step, the residence time in the apparatus having a melt kneading function of the object to be melt kneaded is typically 10 to 290 seconds, 20 to 240 seconds, or 30 to 210 seconds. In the method for producing a fluorinated copolymer composition, the melt kneading step is carried out so that the fluorinated elastomer B is dispersed in the thermoplastic resin A as particles with an average diameter of dispersed particles of 0.1 to 50 pm. IVIA / a / ¿U¿ Ί / UU4 / 10 It is possible to disperse the fluorinated elastomer B in the thermoplastic resin A and achieve an average diameter of dispersed particles of 0.1 to 50 pm by appropriately adjusting the kneading temperature, the extrusion shear rate, and the residence time in the apparatus in the melt kneading step. Furthermore, the melt-kneading step is typically performed substantially in the absence of a crosslinking agent or crosslinking auxiliary. Performed substantially in the absence of a crosslinking agent or crosslinking auxiliary means that the melt-kneading is carried out without allowing the fluorinated elastomer B in the fluorinated copolymer composition to become substantially crosslinked. Whether the fluorinated elastomer B in the fluorinated copolymer composition is substantially crosslinked can be confirmed by the flexural modulus value of the fluorinated copolymer composition. If the fluorinated elastomer B is substantially crosslinked, the flexibility of the fluorinated elastic copolymer is lost, and therefore the flexural modulus of the fluorinated copolymer composition exceeds 3,700 MPa. By performing the melt kneading step substantially in the absence of a crosslinking agent and crosslinking auxiliary, it is possible to ensure the flexibility of the fluorinated elastomer B in the fluorinated copolymer composition and improve the impact resistance of the fluorinated copolymer composition. As described above, by melt kneading thermoplastic resin A and fluorinated elastomer B, and other components if included, a fluorinated copolymer composition including thermoplastic resin A and fluorinated elastomer B can be obtained, and the fluorinated copolymer composition obtained is melt moldable and a molded product can be made by melt molding. The fluorinated copolymer composition described herein can be prepared in powder form for use as a coating material. Applications as coated articles may be those described in WO2015 / 182702, which is incorporated herein by reference in its entirety. The fluorinated copolymer composition of the present description is also useful as an additive for a fiber-reinforced molded product, or as a matrix resin for a prepreg of the present description. [Molded product] The molded product described herein is a molded product obtained by molding a molding material comprising the composition of fluorinated copolymer. Polymeric fillers can be used as components to be contained in the molding material, other than the fluorinated copolymer composition of the present description. As such polymeric fillings, polycarbonate, polyethylene terephthalate, polybutylene terephthalate, polyarylate, polycaprolactone, phenoxy resins, polysulfone, polyethersulfone, polyether ketone, polyether ether ketone, polyether amide, polyamide 6, polyamide 66, polyamide 11, polyamide 12, polyamide 610, polyphenylene oxide, polyphenylene sulfide, polytetrafluoroethylene, copolymer of can be used. Mxazuz Ί / UU4 / 10 acrylonitrile / butadiene / styrene (ABS), polymethyl methacrylate (PMMA), polypropylene, polyethylene, polybutadiene, butadiene-styrene copolymer, ethylene propylene diene rubber (EPDM), styrene-butadiene block copolymer, butadiene-acrylonitrile copolymer, acrylic rubber, styrene-maleic anhydride copolymer, styrene-phenyl maleimide copolymer, etc. The method for molding the molding material, which includes the fluorinated copolymer composition described herein, is not particularly limited, provided it is a common molding method. Examples include injection molding, extrusion molding, coextrusion molding, blow molding, compression molding, blow molding, transfer molding, calendering, and so on. The fluorinated copolymer composition is typically excellent in melt moldability, and therefore the molded product is typically an injection-molded product formed by injection molding. The melt molding apparatus to be used for melt molding of the fluorinated copolymer composition can be one commonly used in melt molding, for example, a hot press duplex Model: SA-301 (melt heat press machine, manufactured by Tester Sangyo Co., Ltd.) can be used. The production of a molded product can be carried out continuously after the above-described production of the fluorinated copolymer composition. The molded product can be used in a variety of applications. Specific examples include, but are not limited to, sliding members, sealing materials, gears, actuators, pistons, bearings, housings, aircraft interiors, fuel lines, bushings, tubes, hoses, tanks, seals, wires, cables, films, sheets, bottles, fibers, and more. The materials described in document W02015 / 182702 may be used for tubing, hose, tanks, seals, or wire. Additionally, the tubing or hose may be used for drilling in the search for energy resources such as oil, natural gas, shale oil, etc. An electrical wire coating material for wires, cables, etc., is typically used as an insulating covering for electrical wire or rectangular copper wire for motor coils, typically as an insulating covering for a rectangular conductor to be used in a drive motor for a hybrid electric vehicle (HEV) or an electric vehicle (EV), and in such cases, the insulating covering is typically made of film. An application may also be used for deep-well cable for drilling for energy resources such as oil, natural gas, shale oil, etc.Additionally, applications include a speaker vibration plate, a plate for traumatic injuries or bone fractures, an insulating paper in various electrical insulating adhesive tapes, such as an insulating paper in a motor, and a sealing tape for use on oil and natural gas pipelines. The shape of the molded product of the present description is not particularly limited, and the molded product can be used in shapes, for applications and as risers, as described in document WO2015 / 182702. The molded product described herein, made from a fluorinated copolymer composition, has improved impact resistance and excellent moldability without compromising the excellent heat resistance and mechanical properties inherent in a heat-resistant thermoplastic resin. These properties make the molded product useful in high-performance applications, such as an aircraft housing or interior. The melt extrusion molding method for film is not particularly limited. A flat die method or an inflation method can be used. In a flat die method, the flow rate of the molten resin and the thickness of the product can be precisely controlled by adjusting the shock bar or lip in the die. Furthermore, in an inflation method, by introducing air from a circular die into an extruded product to inflate it and create a film, it is possible to ensure uniform film thickness. The cylinder temperature at the time of the previous molding is typically 300 to 420°C, or 330 to 370°C. Furthermore, the die temperature is preferably 350 to 420°C, more preferably 350 to 380°C. Within this range, the resulting film will have excellent surface smoothness because friction with the die is reduced, and resin breakdown due to thermal history during molding is suppressed, thus ensuring excellent film surface smoothness. The shear rate by extrusion during film molding is typically 3 to 2500 s⁻¹, 10 to 1000 s⁻¹, or 10 to 100 s⁻¹. The residence time in the apparatus is typically 10 to 1,000 seconds or 60 to 500 seconds. [Prepreg] The prepreg described herein comprises a matrix resin and reinforcing fibers. Specifically, it is a sheet-like material having a matrix resin impregnated with reinforcing fibers, and can be described as a sheet-like material having reinforcing fibers embedded in the matrix resin (i.e., the fluorinated copolymer composition). (Reinforcing fibers) As reinforcing fibers, from the point of view of the mechanical properties of the fiber-reinforced molded product, long continuous fibers with a length of at least 10 mm are typically used. The reinforcing fibers do not need to be continuous along their entire length in the longitudinal direction or along their entire width in the width direction of the reinforcing fiber sheet, and they can be split in half. As a processed form of reinforcing fibers, from the standpoint of the mechanical properties of the fiber-reinforced molded product, a sheet-like form (hereafter also referred to as reinforcing fiber sheet) is typical. The reinforcing fiber sheet may be a bundle of reinforcing fibers composed of a plurality of reinforcing fibers, a fabric made by weaving such bundles of reinforcing fibers, a unidirectional bundle of reinforcing fibers having a plurality of reinforcing fibers aligned in one direction, a unidirectional fabric composed of such unidirectional bundles of fibers, a combination thereof, one having a plurality of laminated reinforcing fiber bundles, etc. Reinforcing fibers can be inorganic fibers, metallic fibers, organic fibers, etc. Inorganic fibers can be carbon fibers, graphite fibers, glass fibers, silicon carbide fibers, silicon nitride fibers, alumina fibers, silicon carbide fibers, boron fibers, etc. Metallic fibers can be aluminum fibers, brass fibers, stainless steel fibers, etc. Organic fibers can be aromatic polyamide fibers, polyaramid fibers, polyparaphenylene benzoxazole (PBO) fibers, polyphenylene sulfide fibers, polyester fibers, acrylic fibers, nylon fibers, polyethylene fibers, etc. Reinforcing fibers can be those that have been given a surface treatment. As reinforcing fibers, a single type can be used, or two or more types can be used in combination. In certain modalities, the reinforcing fibers are carbon fibers, which have a relatively low specific gravity and a relatively high strength and modulus. [Fiber-reinforced molded product] The fiber-reinforced molded product described herein is one that uses the prepreg described herein. The fiber-reinforced molded product may be formed using only the prepreg of the present description; it may be a laminate formed using the prepreg of the present description and another prepreg other than the prepreg of the present description; or it may be a laminate formed using the prepreg of the present description and, as required, another prepreg and a member other than the prepregs. Another prepreg can be a prepreg in which the matrix resin comprises thermoplastic resin A and does not contain fluorinated elastomer B; or a prepreg in which the matrix resin comprises fluorinated elastomer B and does not contain thermoplastic resin A. The member other than the prepreg can be a metallic member; a resin film containing thermoplastic resin A; a resin film containing fluorinated elastomer B, etc. The metal member can be a sheet of metal, several metal parts, etc. The metal can be iron, stainless steel, aluminum, copper, brass, nickel, zinc, etc. The shape of the metal member is not particularly limited and can be appropriately selected according to the fiber-reinforced molded product to be obtained. The fiber-reinforced molded product described herein can be formed by the usual hot-press molding process using the prepreg described herein. The fiber-reinforced molded product described herein can be used as described in WO2015 / 182702, as a housing for a smartphone, a core material for a power line, or a pressure vessel for storing hydrogen or fuel, such as IVIA / a / ZUZ Ί / UU4 / 10 gasoline, a repair or reinforcement sheet for a tunnel or road, an aircraft member, a blade for a windmill, an outer plate for a car, a housing for an electronic device, a tray or chassis, a sporting item (a tennis racket frame, a bat, a golf club, a fishing rod, a bicycle frame, a rim, a tire, a wheel, a crank, etc.), etc. Furthermore, the molded product can be used as a laminate or partially composite with another material. This material can include metals (iron, copper, stainless steel, etc.), glass, plastic, rubber, and so on. Specific examples of other plastic materials can be those described in WO2015 / 182702, such as a liquid crystal polymer, a polyaryl ketone, a polyethersulfone, a polyphenylsulfone, a polyacetal, a polyurethane, etc. Examples include polyamide, polyamide 6, polyamide 66, polyamide 46, polyamide 11, polyamide 12, polyamide 610, polyamide 612, polyamide 6 / 66 copolymer, polyamide 6 / 66 / 610 copolymer, polyamide MXD6, polyamide 6T, polyamide 9T, and polyamide 6 / 6T copolymer, etc. EXAMPLES The samples and comparative samples were prepared using a twin-screw extruder. The compositions of Samples 1-12 are provided in Table 1 and the process parameters for the twin-screw extruder are provided in Table 3. The compositions of Comparative Examples A and B are provided in Table 2 and the process parameters for the twin-screw extruder are provided in Table 4. It should be noted that Comparative Example B generally corresponds to Examples 1-4 described in WO 2017 / 188280. Mxazuz Ί / UU4 / 10 TABLE 1 Sample No. Fluorinated elastomer Thermoplastic resin Shear stress of Fluorinated elastomer Average size of dispersed particles of fluorinated elastomer 1 F-1 PEEK-1 0.27 <3 2 F-1 PEEK-1 0.27 <3 3 F-1 PEEK-1 0.27 <7 4 F-1 PEEK-1 0.27 <3 5 F-1 PEEK-1 0.27 <3 6 F-1 PEEK-1 0.27 <3 7 F-1 PEEK-3 0.26 <3 8 F-1 PEEK-3 0.26 <3 9 F-1 PEEK-3 0.26 <3 10 F-1 PEEK-4 0.25 <3 11 F-1 PEEK-4 0.25 <3 12 F-1 PEEK-4 0.25 <3 TABLE 2 Comparative Sample No. Fluorinated Elastomer Thermoplastic Resin Shear Strength of Fluorinated Elastomer Average Dispersed Particle Size of Fluorinated Elastomer A F-1 PEEK-2 0.10 16 B F-1 PEEK-2 0.10 7 IVIA / a / ¿U¿ Ί / UU4 / 10 TABLE 3 Sample No. Screw Rotation (rpm) Extruder Barrel Size (mm) Screw Shear (sec1) Resin Temperature °C Thermoplastic Shear Viscosity at Screw Shear (Pa*sec) 1 200 27 283 386 699 2 200 27 283 385 711 3 200 27 283 374 840 4 200 27 452 410 299 5 64 27 91 364 1637 6 200 27 283 386 699 7 160 27 226 382 894 8 160 27 226 381 894 9 130 27 184 379 969 10 200 27 283 380 852 11 180 27 254 381 916 12 180 27 254 380 916 IVIA / a / ¿U¿ Ί / UU4 / 10 TABLE 4 Sample No. Screw rotation (rpm) Extruder barrel size (mm) Screw shear (sec*1) Resin temperature °C Thermoplastic shear viscosity at screw shear (Pa'ssec) A 160 27 226 380 321 B 200 15 157 380 354 Fluorinated elastomer (F-1): is a propylene copolymer (manufactured by Asahi Glass Company, Limited, product name “AFLAS 150FC”. Thermoplastic resin (PEEK 1): is a polyether ether ketone with the trade name Vestakeep 5000G. Thermoplastic resin (PEEK 2): is a polyether ether ketone with the trade name Victrex PEEK 150R. Thermoplastic resin (REEK 3): is a polyether ether ketone with the trade name Ketaspire KT-820NT. Thermoplastic resin (PEEK 4): is a polyether ether ketone with the trade name Victrex PEE450G. Additional sample information and performance data are provided in Tables 5-7. TABLE 5 IVIA / d / ZUZ I / UU4 / 10 Sample No. Weight Ratio of Thermoplastic Resin to Fluorinated Elastomer Viscosity Ratio of Thermoplastic Resin to Fluorinated Elastomer Shear Strength Ratio of Thermoplastic Resin to Fluorinated Elastomer Izod Impact Strength (J / m) 1 88 / 12 1.14 1.7 263 2 77 / 23 1.14 1.7 - 3 66 / 34 1.14 1.7 - 4 77 / 23 1.14 1.7 - 5 77 / 23 1.14 1.7 - 6 77 / 23 1.14 1.7 - 7 90 / 10 1.07 1.6 192 8 88 / 12 1.07 1.6 335 9 66 / 34 1.07 1.6 - 10 90 / 10 1.9 1.6 136 11 88 / 12 1.9 1.6 163 12 66 / 34 1.9 1.6 - TABLE 6 Sample No. Weight Ratio of Thermoplastic Resin to Fluorinated Elastomer Viscosity Ratio of Thermoplastic Resin to Fluorinated Elastomer Shear Strength Ratio of Thermoplastic Resin to Fluorinated Elastomer Izod Impact Strength (J / m) A 77 / 23 0.32 0.6 39 B 88 / 12 0.32 0.6 <42 TABLE 7 Sample No. Immersion IRM-903 Diesel Immersion No. 2 Steam Immersion 1 57 29 53 2 76 33 54 3 53 54 108 IVIA / a / ¿U¿ Ί / UU4 / 10 It should be noted that the weight ratio, viscosity ratio, shear strength, average dispersed particle size, and shear strength ratio are all calculated as extensively described. Izod impact strength was measured according to ASTM D 256-10 Test Method A at 70° ± 5°F, 50% ± 10% RH, with the following conditioning: 40 hours, 70° ± 5°F, 50% ± 10% RH, and a notched flexible bar preparation, with the notch having a 45° angle and a final radius of 0.010. The molding method for the test bar used the injection molding temperature profile (F), NOZ=707-734, Barrel 680-716, and Tooling 390. Steam immersion was performed at 260°C for 21 days using steam. Diesel immersion was performed at 150°C for 21 days using a weight ratio of 100% diesel fuel No. 2 specified in CAS No. 68476-34-6. As shown above in Tables 5 and 6, Samples 1, 7, 8, 10, and 11 significantly outperformed Comparative Samples A and B in impact resistance. Specifically, the shear strength of the thermoplastic resin in Samples 1–12 was greater than 0.11 MPa, whereas the shear strength of the thermoplastic resin in Comparative Samples A and B was less than 0.11 MPa. All combinations of the aforementioned modalities throughout this description are expressly contemplated in one or more non-limiting modalities, even if such a description is not explicitly stated in a single preceding paragraph or section. In other words, an expressly contemplated modality may include any or more of the previously described elements selected and combined from any part of this description. One or more of the values ​​described above may vary by ±5%, ±10%, ±15%, ±20%, ±25%, etc., provided the variation remains within the scope of the description. Unexpected results may be obtained from each member of a Markush group independently of all other members. Each member may be relied upon individually or in combination and provides adequate support for specific modalities within the scope of the appended claims. The subject matter of all combinations of independent and dependent claims, whether single or multiple dependent claims, is expressly contemplated herein. The description is illustrative, including descriptive rather than limiting words. Many modifications and variations of the present description are possible in light of prior teachings, and the description may be implemented in ways other than those specifically described herein. It should also be understood that any intervals and subintervals relied upon to describe various embodiments of the present description, independently and collectively, are within the scope of the appended claims and are understood to describe and encompass all intervals, including whole and / or fractional values, even if such values ​​are not expressly stated herein. A person skilled in the art will readily recognize that the enumerated intervals and subintervals sufficiently describe and permit various embodiments of the present description, and such intervals and subintervals may be further delimited into halves, thirds, quarters, fifths, etc. By way of example only, an interval from 0.1 to 0.9 may be further delineated into a lower third, i.e., from 0.1 to 0.3, a middle third, i.e., from 0.4 to 0.6, and an upper third, i.e., from 0.7 to 0.9.9, which individually and collectively are within the scope of the appended claims, and can be relied upon individually and / or collectively and provide adequate support for specific modalities within the scope of the appended claims. Furthermore, with respect to language that defines or modifies an interval, such as at least, greater than, less than, not more than, and the like, it is understood that such language includes subintervals and / or an upper or lower bound. As another example, an interval of at least 10 inherently includes a subinterval from at least 10 to 35, a subinterval from at least 10 to 25, a subinterval from 25 to 35, and so forth, and each subinterval can be relied upon individually and / or collectively and provides adequate support for specific modalities within the scope of the appended claims.Finally, an individual number within a described range can be relied upon and provides adequate support for specific modalities within the scope of the appended claims. For example, a range from 1 to 9 includes several individual whole numbers, such as 3, as well as individual numbers that include a decimal point (or fraction), such as 4.1, which can be relied upon and provide adequate support for specific modalities within the scope of the appended claims.

Claims

1. A fluorinated copolymer composition comprising: a thermoplastic resin A having a shear strength (ta) greater than 0.11 MPa when measured with a capillary rheometer at a shear rate of 243 sec1 and 360°C in accordance with ASTM D3835; and a fluorinated elastomer B dispersed within the thermoplastic resin A and having an average dispersed particle size of less than 50 pm.

2. The fluorinated copolymer composition according to claim 1, wherein the thermoplastic resin A is at least one melt-moldable heat-resistant thermoplastic resin selected from the group consisting of a polyarylate, a polyether sulfone, a polyaryl sulfone, an aromatic polyamide, an aromatic polyether amide, an aromatic polyetherimide, a polyphenylene sulfide, a polyaryl ether ketone, a polyamideimide, and a liquid crystalline polyester.

3. The fluorinated copolymer composition according to claim 1 or 2, wherein the fluorinated elastomer B comprises units derived from at least one monomer selected from the group consisting of tetrafluoroethylene, hexafluoropropylene, vinylidene fluoride, and chlorotrifluoroethylene.

4. The fluorinated copolymer composition according to any of claims 1 to 3, having a flexural modulus of 1,000 to 3,700 MPa.

5. The fluorinated copolymer composition according to any of claims 1 to 4, wherein the viscosity ratio of the thermoplastic resin A to the fluorinated elastomer B is greater than 0.35 when the viscosity is measured with a capillary rheometer at a shear rate of 12.1 sec1 and 360°C according to ASTM D3835.

6. The fluorinated copolymer composition according to any of claims 1 to 5, wherein the viscosity of the fluorinated elastomer B is greater than 2,000 Pa s when measured with a capillary rheometer at a shear rate of 12.1 sec1 and 360°C according to ASTM D3835.

7. The fluorinated copolymer composition according to any of claims 1 to 6, wherein the fluorinated elastomer B is selected from the group consisting of a copolymer having units derived from tetrafluoroethylene and propylene, a copolymer having units derived from hexafluoropropylene and vinylidene fluoride, and a copolymer having units derived from tetrafluoroethylene and a perfluoro(alkyl vinyl ether) with the perfluoro(alkyl vinyl ether) represented by the following formula (I), CF2=CF(ORf) (I) wherein R is a linear or branched C1-8 perfluoroalkyl group.

8. The fluorinated copolymer composition according to any of claims 1 to 7, wherein the fluorinated elastomer B is a copolymer having units derived from tetrafluoroethylene and propylene.

9. The fluorinated copolymer composition according to any one of claims 1 to 8, wherein the thermoplastic resin A is selected from the group consisting of a polyaryl ether ketone, a polyether sulfone, a polyether ether ketone, an aromatic amide polyether, and a polyaryl sulfone.

10. The fluorinated copolymer composition according to any of claims 1 to 9, wherein the thermoplastic resin A is a polyaryl ether ketone or a polyether ether ketone.

11. The fluorinated copolymer composition according to any one of claims 1 to 10, wherein the weight percent ratio of thermoplastic resin A to weight percent of fluorinated elastomer B is 99 / 1 to 55 / 45.

12. The fluorinated copolymer composition according to any of claims 1 to 11, having a tensile elongation greater than 120% when measured according to ASTM D638-14 at 200sC.

13. The fluorinated copolymer composition according to any of claims 1 to 12, wherein the thermoplastic resin A has a shear strength (ta) greater than 0.2 MPa and a ratio of the viscosity of the thermoplastic resin A to the fluorinated elastomer B is greater than 1.1 and less than 1.3, when the viscosity is measured with a capillary rheometer at a shear rate of 12.1 sec-1 and 360°C according to ASTM D3835.

14. The fluorinated copolymer composition according to any of claims 1 to 13, wherein the fluorinated elastomer B dispersed within the thermoplastic resin A has an average dispersed particle size of less than 15 pm.

15. The fluorinated copolymer composition according to claim 14, wherein the thermoplastic resin A is polyaryl ether ketone, polyether ether ketone or a combination thereof, and the fluorinated elastomer B is a copolymer having units derived from tetrafluoroethylene and propylene.

16. A molded product obtained by injection molding of a molding material comprising the fluorinated copolymer composition according to any of claims 1 to 15.

17. An extruded product obtained by extruding the fluorinated copolymer composition according to any of claims 1 to 15.

18. A method for forming a fluorinated copolymer composition comprising: melt-kneading (i) a thermoplastic resin A with (ii) a fluorinated elastomer B such that the fluorinated elastomer B is dispersed within the thermoplastic resin A with an average dispersed particle size of less than 50 pm to form the fluorinated copolymer composition; wherein the thermoplastic resin A has a shear strength (ta) greater than 0.11 MPa when measured with a capillary rheometer at a shear rate of 243 sec-1 and 360°C in accordance with ASTM D3835.

19. The method according to claim 18, wherein the ratio of the viscosity of the thermoplastic resin A to the fluorinated elastomer B is greater than 0.35 when the viscosity is measured with a capillary rheometer at a shear rate of 12.1 sec1 and 360°C according to ASTM D3835.