Aromatic polyether resin composition, composite material, and molded article

Abstract

To provide an aromatic polyether resin composition, a composite material, and a molded article having superior molding processability.SOLUTION: An aromatic polyether resin composition contains an aromatic polyether and has a crystallinity (Xc) of 25% or less and a loss tangent (tanδ) of 2.0 or more, where the weight average molecular weight (Mw) and the loss tangent satisfy the following formula (E1): (Mw)×(tanδ)>130,000 (E1).SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to an aromatic polyether resin composition, a composite material, and a molded article. Specifically, the present invention relates to an aromatic polyether resin composition, a composite material, and a molded article having excellent moldability. [Background technology]

[0002] Aromatic polyethers have excellent heat resistance and mechanical strength, and are used as metal replacement materials. In recent years, their applications have expanded to include automobiles, aircraft, and the medical field. Among these, polyether ether ketone (abbreviated as "PEEK"), which is a type of aromatic polyether, is known as a representative resin of engineering plastics (Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 59-93724 Summary of the Invention [Problem to be solved by the invention]

[0004] Aromatic polyethers are sometimes used in combination with fillers such as carbon fibers to form fiber-reinforced plastics (FRPs). The inventors of the present invention have found that conventional aromatic polyethers have room for further improvement in terms of molding processability. They also believe that there is room for further improvement in the interfacial adhesive strength to the filler.

[0005] Therefore, the present inventors conducted extensive research and found that an aromatic polyether resin composition that satisfies the conditions of a predetermined degree of crystallinity, loss tangent, and weight-average molecular weight can improve molding processability, and thus completed the present invention.

[0006] Furthermore, as a result of further intensive research, the present inventors have found that an aromatic polyether resin composition that satisfies the conditions of a predetermined radical amount, degree of crystallinity, loss tangent, and weight-average molecular weight can exhibit excellent interfacial adhesive strength to a fibrous filler (hereinafter also referred to as "reinforcing fiber") and can also improve molding processability, thereby completing the present invention.

[0007] An object of the present invention is to provide an aromatic polyether resin composition, a composite material, and a molded article that are excellent in moldability. An object of the present invention is to provide an aromatic polyether resin composition, a composite material, and a molded article that can exhibit excellent interfacial adhesive strength to reinforcing fibers and also have excellent molding processability. [Means for solving the problem]

[0008] According to the present invention, the following aromatic polyethers and the like are provided. 1. Contains aromatic polyethers, The crystallinity (Xc) is 25% or less, The loss tangent (tanδ) is 2.0 or more, and The weight average molecular weight (Mw) and the loss tangent satisfy the following formula (E1): Aromatic polyether resin composition. (Mw)×(tanδ)>130,000···(E1) 2. The aromatic polyether or the aromatic polyether resin composition has a radical amount of 6.5 x 10 at 25°C, measured using TEMPOL as a standard substance and benzene as the solvent for the standard substance. 15 2. The aromatic polyether resin composition according to 1 above, having a spin / g or more. 3. The aromatic polyether resin composition according to 1 or 2 above, which has a weight average molecular weight of 50,000 or more. 4. The aromatic polyether resin composition according to 1 or 2 above, which contains 0.001 to 10 parts by mass of a fluidizing agent relative to 100 parts by mass of the aromatic polyether. 5. The aromatic polyether resin composition according to 4 above, wherein the fluidizing agent comprises at least one selected from the group consisting of organic fluidizing agents and inorganic fluidizing agents. 6. A method for producing the aromatic polyether resin composition according to 1 or 2 above, comprising: The aforementioned production method, which comprises kneading 0.001 to 10 parts by mass of a fluidizing agent with 100 parts by mass of the aromatic polyether. 7. A composite material comprising the aromatic polyether resin composition according to 1 or 2 above and reinforcing fibers. 8. The composite material according to 7 above, wherein the reinforcing fiber is contained in an amount of 10 to 300 parts by mass per 100 parts by mass of the aromatic polyether resin composition. 9. The composite material according to 7 above, wherein the reinforcing fibers include one or more selected from the group consisting of carbon fibers, glass fibers, and aramid fibers. 10. The composite material according to 7 above, wherein the reinforcing fibers have a fiber length of 5 mm or more. [Effects of the Invention]

[0009] According to one aspect of the present invention, an aromatic polyether resin composition, a composite material, and a molded article having excellent moldability can be provided. According to another aspect of the present invention, an aromatic polyether resin composition, a composite material, and a molded article can be provided which can exhibit excellent interfacial adhesive strength to reinforcing fibers and also have excellent molding processability. DETAILED DESCRIPTION OF THE INVENTION

[0010] The aromatic polyether resin composition, composite material, and molded article of the present invention will be described in detail below. In this specification, "x to y" represents a numerical range of "not less than x and not more than y." The upper and lower limits of the numerical ranges can be combined in any way.

[0011] 1. Aromatic polyether resin composition An aromatic polyether resin composition according to one embodiment of the present invention contains an aromatic polyether, has a crystallinity (Xc) of 25% or less, a loss tangent (tanδ) of 2.0 or more, and has a weight average molecular weight (Mw) and a loss tangent satisfying the following formula (E1): (Mw)×(tanδ)>130,000···(E1)

[0012] The aromatic polyether resin composition according to this embodiment has the effect of providing excellent moldability. Although the reason for such an effect is not entirely clear, it is presumed that excellent molding processability is easily obtained when the crystallinity (Xc) is 25% or less and the loss tangent (tanδ), which is an index of the viscosity of the resin when molten, is 2.0 or more. Furthermore, it is presumed that excellent molding processability and mechanical properties are obtained when the weight average molecular weight (Mw) and loss tangent satisfy the above formula (E1). Furthermore, it is presumed that these factors act synergistically to significantly improve the physical properties of the aromatic polyether resin composition.

[0013] The aromatic polyether resin composition according to another embodiment of the present invention has a radical amount of 6.5×10 at 25°C, measured using TEMPOL as a standard substance and benzene as a solvent for the standard substance. 15 The polymer contains an aromatic polyether having a spin / g or more, a crystallinity (Xc) of 25% or less, a loss tangent (tanδ) of 2.0 or more, and the weight average molecular weight (Mw) and loss tangent satisfy the following formula (E1): (Mw)×(tanδ)>130,000···(E1)

[0014] The aromatic polyether resin composition according to this embodiment can exhibit excellent interfacial adhesive strength to reinforcing fibers, and also has the effect of excellent moldability. The reason for this effect is not entirely clear, but the amount of aromatic polyether radicals is 6.5 × 10 15It is presumed that the high spin / g or more interacts with the reinforcing fibers and forms chemical bonds. Furthermore, excellent molding processability is easily achieved by having a crystallinity (Xc) of 25% or less and a loss tangent (tanδ), which is an index of viscosity of the resin when molten, of 2.0 or more. Furthermore, it is presumed that excellent molding processability and mechanical properties are achieved by having the weight-average molecular weight (Mw) and loss tangent satisfy the above formula (E1). Furthermore, it is presumed that these factors act synergistically to significantly improve the physical properties of the aromatic polyether resin composition.

[0015] As a result of extensive research by the applicant, it was found that the amount of radicals in the aromatic polyether contributes to the adhesion to the reinforcing fibers (for example, Japanese Patent Application No. 2023-053516). The present invention further focuses on the crystallinity (Xc), loss tangent (tanδ), and weight-average molecular weight (Mw) of the resin composition, and has discovered that an aromatic polyether resin composition can exhibit excellent interfacial adhesive strength to the reinforcing fibers and also has excellent molding processability.

[0016] The crystallinity (Xc) of the aromatic polyether resin composition is a value measured by the method described in the examples. The loss tangent (tan δ) of the aromatic polyether resin composition is a value measured by the method described in the examples. The weight average molecular weight (Mw) of the aromatic polyether resin composition is a value measured by the method described in the examples.

[0017] In this specification, unless otherwise specified, the "radical amount" of an aromatic polyether or an aromatic polyether resin composition means the "radical amount per unit mass (unit: spin / g)" of the aromatic polyether or the aromatic polyether resin composition, and may also be referred to as the "radical concentration." As used herein, "TEMPOL" means "4-hydroxy-2,2,6,6-tetramethylpiperidine-1-oxyl" unless otherwise specified.

[0018] In one embodiment, the radical content of the aromatic polyether is 6.5×10 15 spin / g or more, 7.0×10 15 spin / g or more, 8.0×10 15 spin / g or more, 8.9×10 15 spin / g or more, 1.0×10 16 spin / g or more, 2.0×10 16 spin / g or more, 3.0×10 16 spin / g or more, or 4.0 x 10 16 spin / g or more, and 9.0×10 17 spin / g or less, 5.0×10 17 spin / g or less, 4.0×10 17 spin / g, 3.7 × 10 17 spin / g or less, or 1.0 x 10 17 spin / g or less.

[0019] The amount of radicals in aromatic polyether is 6.5×10 15 When the spin / g or more is more than 9.0×10, the above-mentioned composite effect and the like are well exhibited, and sufficient interfacial shear strength with the reinforcing fiber is obtained. 17 When the spin / g or less, sufficient thermal stability is easily obtained, and the molded article is easily able to exhibit sufficient mechanical properties.

[0020] The radical amount of the aromatic polyether is a value measured by the method described in the examples.

[0021] The amount of radicals in the aromatic polyether can be increased to the above-mentioned range, for example, by using a monomer containing a chlorine atom as a reactive group (e.g., 4,4′-dichlorobenzophenone) as a monomer when synthesizing (polymerizing) the aromatic polyether.

[0022] In one embodiment, the radical amount of the aromatic polyether resin composition is 6.5×10 15 spin / g or more, 7.0×10 15 spin / g or more, 8.0×1015 spin / g or more, 8.9×10 15 spin / g or more, 1.0×10 16 spin / g or more, 2.0×10 16 spin / g or more, 3.0×10 16 spin / g or more, or 4.0 x 10 16 spin / g or more, and 9.0×10 17 spin / g or less, 5.0×10 17 spin / g or less, 4.0×10 17 spin / g, 3.7 × 10 17 spin / g or less, or 1.0 x 10 17 spin / g or less.

[0023] The amount of radicals in the aromatic polyether resin composition is 6.5 × 10 15 When the spin / g or more is 9.0×10 or more, the above-mentioned composite effect and the like are well exhibited, and sufficient interfacial shear strength with the reinforcing fiber is obtained. 17 When the spin / g or less, sufficient thermal stability is easily obtained, and the molded article is easily able to exhibit sufficient mechanical properties.

[0024] The radical amount of the aromatic polyether resin composition is a value measured by the method described in the examples.

[0025] The radical amount of the aromatic polyether resin composition can be adjusted by adjusting the radical amount of the aromatic polyether used in producing the aromatic polyether resin composition.

[0026] In one embodiment, the crystallinity (Xc) of the aromatic polyether resin composition is 25% or less, 24% or less, 23% or less, 22% or less, 21% or less, or 20% or less, and 5% or more, 6% or more, 7% or more, 8% or more, 9% or more, 10% or more, 11% or more, 12% or more, 13% or more, 14% or more, or 14.5% or more.

[0027] When the crystallinity (Xc) of the aromatic polyether resin composition is 25% or less, the heating temperature during molding can be lowered. This prevents thermal degradation of the aromatic polyether and improves energy efficiency during molding. As a result, the suitability of the aromatic polyether resin composition for molding, i.e., molding processability, is improved. The degree of crystallinity (Xc) of the aromatic polyether resin composition is preferably 5% or more from the viewpoint of chemical resistance.

[0028] The method for calculating the crystallinity of the aromatic polyether resin composition is not particularly limited, and examples thereof include measurement using a wide-angle X-ray diffractometer. Using wide-angle X-ray diffraction, the portion obtained by subtracting the diffraction intensity of the amorphous region from the total diffraction intensity of the aromatic polyether resin composition may be used to determine the crystalline region, and the crystallinity may be calculated from the ratio to the total diffraction intensity. Specifically, the crystallinity can be measured by the method described in the Examples.

[0029] In one embodiment, the loss tangent (tan δ) of the aromatic polyether resin composition is 2.0 or more, 2.1 or more, or 2.2 or more. The upper limit is not particularly limited, and can be, for example, 15.0 or less.

[0030] When the loss tangent (tanδ) of the aromatic polyether resin composition is 2.0 or more, the viscosity of the resin when molten is likely to be suitable for molding processes such as extrusion molding, film molding, etc. As a result, the suitability of the aromatic polyether resin composition for molding processes, i.e., molding processability, is improved.

[0031] In one embodiment, the weight average molecular weight (Mw) of the aromatic polyether resin composition is not particularly limited as long as it satisfies the above formula (E1), but is, for example, 45,000 or more, 50,000 or more, 55,000 or more, 60,000 or more, or 65,000 or more, and 120,000 or less, 115,000 or less, 110,000 or less, 105,000 or less, 100,000 or less, 95,000 or less, 90,000 or less, or 85,000 or less.

[0032] When the weight average molecular weight (Mw) of the aromatic polyether resin composition is 45,000 or more, excellent mechanical properties are likely to be obtained. When the weight average molecular weight (Mw) of the aromatic polyether resin composition is 120,000 or less, the viscosity does not become too high, and excellent molding processability is likely to be obtained.

[0033] Methods for adjusting the weight average molecular weight (Mw) of the aromatic polyether resin composition include, but are not limited to, adjusting the temperature and reaction time during polymerization.

[0034] In one embodiment, the aromatic polyether resin composition has a product of the weight average molecular weight (Mw) and the loss tangent of 130,000 or more, 140,000 or more, or 150,000 or more. The upper limit is not particularly limited, and may be, for example, 1,000,000 or less.

[0035] In one embodiment, the aromatic polyether comprises a structural unit represented by the following formula (a) and one or more structural units selected from the group consisting of structures represented by the following formulas (b) and (c): [ka]

[0036] In one embodiment, the aromatic polyether can also be said to be a copolymer of a structural unit represented by formula (a) and one or more structural units selected from the group consisting of formulas (b) and (c).

[0037] In one embodiment, the copolymer is a random copolymer, an alternating copolymer, or a block copolymer, preferably a random copolymer.

[0038] In one embodiment, in the aromatic polyether, the substitution position (bonding position) of the phenyl group in the structural unit represented by formula (b) may be any position on the benzene ring constituting the main chain shown on the far right in formula (b) (the phenyl group is introduced so as to substitute any of the four hydrogen atoms on the benzene ring).

[0039] When two or more structural units represented by formula (b) are adjacent in an aromatic polyether, the aromatic polyether may contain one or more structures selected from the group consisting of a structure represented by the following (b1), a structure represented by the following (b2), and a structure represented by the following (b3): [ka]

[0040] In each of the structures represented by the above formulas (b1) to (b3), the substitution positions of the phenyl groups in the two structural units represented by formula (b) that form the structure are different from each other. The effects of the present invention are well exhibited in any of the structures.

[0041] Here, the case where two or more structural units represented by formula (b) are adjacent has been described, but even when two or more structural units represented by formula (b) are arranged via other structural units (for example, structural units represented by formula (a)), the substitution positions of the phenyl groups in these structural units represented by formula (b) may be the same or different. In either case, the effects of the present invention are well exhibited.

[0042] In one embodiment, 50% by mass or more, 60% by mass or more, 70% by mass or more, 80% by mass or more, 90% by mass or more, 95% by mass or more, 97% by mass or more, 99% by mass or more, 99.5% by mass or more, or substantially 100% by mass of the aromatic polyether are structural units represented by formula (a) and structural units represented by formula (b). In addition, in the case of "substantially 100% by mass", unavoidable impurities may be contained.

[0043] In one embodiment, the aromatic polyether has a molar ratio of the structural units represented by formula (b) to the total amount of the structural units represented by formula (a) and the structural units represented by formula (b) of 1 mol% or more, 2 mol% or more, 3 mol% or more, 4 mol% or more, 5 mol% or more, 6 mol% or more, 7 mol% or more, or 8 mol% or more, and 99 mol% or less, 90 mol% or less, 80 mol% or less, 70 mol% or less, 60 mol% or less, 50 mol% or less, or 40 mol% or less.

[0044] In one embodiment, 50% by mass or more, 60% by mass or more, 70% by mass or more, 80% by mass or more, 90% by mass or more, 95% by mass or more, 97% by mass or more, 99% by mass or more, 99.5% by mass or more, or substantially 100% by mass of the aromatic polyether are structural units represented by formula (a) and structural units represented by formula (c). In addition, in the case of "substantially 100% by mass", unavoidable impurities may be contained.

[0045] In one embodiment, the aromatic polyether has a molar ratio of the structural units represented by formula (c) to the total amount of the structural units represented by formula (a) and the structural units represented by formula (c) of 1 mol% or more, 2 mol% or more, 3 mol% or more, 4 mol% or more, 5 mol% or more, 6 mol% or more, 7 mol% or more, or 8 mol% or more, and 99 mol% or less, 90 mol% or less, 80 mol% or less, 70 mol% or less, 60 mol% or less, 50 mol% or less, or 40 mol% or less.

[0046] The structural unit represented by formula (a) and one or more structural units selected from the group consisting of structures represented by formulas (b) and (c) can be copolymerized within a range that does not impair the effects of the present invention.

[0047] In one embodiment, the aromatic polyether contains a structural unit represented by the following formula (a) and a structural unit represented by the following formula (d), and has a radical amount of 6.5 × 10 at 25 ° C., measured using TEMPOL as a standard substance and benzene as a solvent for the standard substance. 15 ~9.0×10 17(spin / g).

[0048] [ka]

[0049] In one embodiment, the copolymer is a random copolymer, an alternating copolymer, or a block copolymer, preferably a random copolymer.

[0050] In one embodiment, the structural unit represented by formula (d) is a structural unit represented by formula (c).

[0051] The structural unit represented by formula (a) and the structural unit represented by formula (d) can be copolymerized to the extent that the effects of the present invention are not impaired.

[0052] In one embodiment, 50% by mass or more, 60% by mass or more, 70% by mass or more, 80% by mass or more, 90% by mass or more, 95% by mass or more, 97% by mass or more, 99% by mass or more, 99.5% by mass or more, or substantially 100% by mass of the aromatic polyether are structural units represented by formula (a) and structural units represented by formula (d). In addition, in the case of "substantially 100% by mass", unavoidable impurities may be contained.

[0053] In one embodiment, the aromatic polyether has a molar ratio of the structural units represented by formula (d) to the total amount of the structural units represented by formula (a) and the structural units represented by formula (d) of 1 mol% or more, 2 mol% or more, 3 mol% or more, 4 mol% or more, 5 mol% or more, 6 mol% or more, 7 mol% or more, or 8 mol% or more, and 99 mol% or less, 90 mol% or less, 80 mol% or less, 70 mol% or less, 60 mol% or less, 50 mol% or less, or 40 mol% or less.

[0054] The terminal structure of the main chain of the aromatic polyether is not particularly limited. In one embodiment, the structural unit represented by formula (1) is located at one or more ends of the main chain of the aromatic polyether. In this case, the terminal structure bonded to the structural unit may be a halogen atom. The halogen atom may be, for example, a chlorine atom (Cl) or a fluorine atom (F). In one embodiment, the structural unit represented by formula (2) is located at one or more ends of the main chain of the aromatic polyether. In this case, the terminal structure bonded to the structural unit may be, for example, a hydrogen atom (H) or the like (when the terminal structure is a hydrogen atom (H), a hydroxyl group is formed together with the oxygen atom (O) in the structural unit). The terminal structure of the aromatic polyether may be, for example, a structure in which the above-mentioned halogen atom or hydroxyl group is replaced with a hydrogen atom (H). The terminal structure may have a structure other than those exemplified above. For example, the terminal structure may have a structure derived from a reaction terminator.

[0055] In one embodiment, the aromatic polyether resin composition has a melt flow rate (MFR) of 1500 g / 10 min or less, 1000 g / 10 min or less, 500 g / 10 min or less, 300 g / 10 min or less, 200 g / 10 min or less, 100 g / 10 min or less, 80 g / 10 min or less, or 60 g / 10 min or less, and 0.0001 g / 10 min or more, 0.0005 g / 10 min or more, or 0.001 g / 10 min or more. The aromatic polyether resin composition has a melt flow rate of, for example, 0.001 to 500 g / 10 min, preferably 0.01 to 100 g / 10 min from the viewpoint of mechanical properties, and more preferably 0.1 to 50 g / 10 min from the viewpoint of moldability.

[0056] [Superplasticizer] In one embodiment, the aromatic polyether resin composition according to one aspect of the present invention includes a fluidizing agent. In this specification, the fluidizing agent means an agent that, when blended with an aromatic polyether, can improve the fluidity of the aromatic polyether when melted.

[0057] In this specification, the fluidity of an aromatic polyether refers to the behavior of the synthetic resin when pressure is applied during heating and melting for molding. The fluidity of the aromatic polyether can be evaluated, for example, by the method described in the Examples (loss tangent (tan δ), thickness measurement).

[0058] The fluidizing agent may include one or more selected from the group consisting of organic fluidizing agents and inorganic fluidizing agents.

[0059] Examples of organic fluidizing agents include aliphatic monocarboxylic acids, metal salts of aliphatic monocarboxylic acids, and phosphoric acid-based metal salts. Examples of the aliphatic monocarboxylic acid include tridecylic acid, myristic acid, pentadecylic acid, palmitic acid, margaric acid, stearic acid, nonadecylic acid, arachidic acid, heneicosylic acid, behenic acid, tricosylic acid, and lignoceric acid. Examples of the metal in the metal salt of an aliphatic monocarboxylic acid include lithium, sodium, magnesium, aluminum, calcium, gallium, strondium, and indium.

[0060] Examples of metals in the phosphate metal salt include lithium, sodium, magnesium, aluminum, calcium, gallium, strondium, and indium. From the viewpoint of thermal stability, it is more preferable that the phosphate metal salt is substantially free of potassium, and even more preferable that it contains no potassium. Note that "substantially free" does not exclude the inclusion of potassium as an unavoidable impurity. Examples of phosphoric acid include phosphorus-containing oxo acids. Examples of the phosphate metal salt include phosphate metal salts, such as 2,4,8,10-Tetra(tert-butyl)-6-hydroxy-12H-dibenzo[d,g][1,3,2]dioxaphosphocin 6-oxide, sodium salt (available as "ADK STAB NA-11" manufactured by ADEKA CORPORATION) and hydroxy aluminum bis(2,4,8,10-tetra-trans-butyl-6-hydroxy-12H-dibenzo[d,g][1.3.2]dioxaphosphocin-6-oxide) (available as "ADK STAB NA-21" manufactured by ADEKA CORPORATION).

[0061] These organic fluidizing agents may be used alone or in combination of two or more.

[0062] Examples of inorganic fluidizing agents include talc, clay, mica, silica, dolomite powder, quartz powder, and diatomaceous earth. These inorganic fluidizing agents may be used alone or in combination of two or more.

[0063] In one embodiment, the content of the fluidizing agent is 0.001 to 10 parts by mass with respect to 100 parts by mass of the aromatic polyether.

[0064] In one embodiment, the content of the fluidizing agent is 0.002 parts by mass or more, 0.005 parts by mass or more, 0.01 parts by mass or more, 0.02 parts by mass or more, 0.05 parts by mass or more, 0.1 parts by mass or more, or 0.2 parts by mass or more, relative to 100 parts by mass of the aromatic polyether. In one embodiment, the content of the fluidizing agent is 10 parts by mass or less, 9.0 parts by mass or less, 8.0 parts by mass or less, 7.0 parts by mass or less, 6.0 parts by mass or less, 5.0 parts by mass or less, 4.0 parts by mass or less, or 3.0 parts by mass or less, relative to 100 parts by mass of the aromatic polyether.

[0065] The aromatic polyether resin composition may contain other components other than the aromatic polyether and the fluidizing agent. The other components are not particularly limited, and examples thereof include other resins other than aromatic polyethers and additives such as antioxidants. Other resins include, for example, fluororesins such as polytetrafluoroethylene. Examples of antioxidants include phosphoric acid compounds, phenolic compounds, amine compounds, and sulfur-based compounds. As the other component, one type may be used alone, or two or more types may be used in combination.

[0066] Examples of the phosphoric acid compound include triphenyl phosphite (available as "JP-360" manufactured by Johoku Chemical Industry Co., Ltd.), trisnonylphenyl phosphite (available as "JP-351" manufactured by Johoku Chemical Industry Co., Ltd.), tricresyl phosphite (available as "JP-3CP" manufactured by Johoku Chemical Industry Co., Ltd.), tris(2-ethylhexyl) phosphite (available as "JP-308E" or "JPE-308E" manufactured by Johoku Chemical Industry Co., Ltd.), tridecyl phosphite (available as "JP-310" manufactured by Johoku Chemical Industry Co., Ltd.), trilauryl phosphite (available as "JP-312L" manufactured by Johoku Chemical Industry Co., Ltd.), tris(tridecyl) phosphite (available as "JP-3 33E"), diphenyl mono(2-ethylhexyl) phosphite (available from Johoku Chemical Industry Co., Ltd. as "JPM-308"), diphenyl monodecyl phosphite (available from Johoku Chemical Industry Co., Ltd. as "JPM-311"), diphenyl mono(tridecyl) phosphite (available from Johoku Chemical Industry Co., Ltd. as "JPM-313"), tetraphenyl dipropylene glycol diphosphite (available from Johoku Chemical Industry Co., Ltd. as "JPP-100"), tetra(C12-C15 alkyl)-4,4'-isopropylidene diphenyl diphosphite (available from Johoku Chemical Industry Co., Ltd. as "JA-805"), 4,4'-butylidenebis(3-methyl-6-t-butylphenyl ditridecyl phosphite) (available as "JPH-1200" from Johoku Chemical Industry Co., Ltd.), a mixture of bis(tridecyl)pentaerythritol diphosphite and bis(nonylphenyl)pentaerythritol diphosphite (available as "JPP-88" from Johoku Chemical Industry Co., Ltd.), bis(decyl)pentaerythritol diphosphite (available as "JPE-10" from Johoku Chemical Industry Co., Ltd.), bis(tridecyl)pentaerythritol diphosphite (available as "JPE-13R" from Johoku Chemical Industry Co., Ltd.), tristearyl phosphite (available as "JPE-318E" from Johoku Chemical Industry Co., Ltd.), distearyl pentaerythritol diphosphite (available as "JPP-2000PT" from Johoku Chemical Industry Co., Ltd.), tris(2,4-Di-tert-butylphenyl) phosphite (available from Johoku Chemical Industry Co., Ltd. as "JP-650"), hydrogenated bisphenol A·pentaerythritol phosphite polymer (available from Johoku Chemical Industry Co., Ltd. as "JPH-3800"), diethyl (3,5-di-t-butyl-4-hydroxybenzyl) phosphonate (available from Johoku Chemical Industry Co., Ltd. as "JC-356"), 3,9-Bis(octadecyloxy)-2,4,8,10-tetraoxa-3,9-dip phosphaspiro[5.5]undecane (available as "ADEKA STAB PEP-8" from ADEKA Corporation), 3,9-Bis(2,6-di-tert-butyl-4-methylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane (available as "ADEKA STAB PEP-36" from ADEKA Corporation), 2,2'-Methylenebis(4,6-di-tert-butylphenyl) 2-ethylhexyl phosphite (available as "ADK STAB HP-10" manufactured by ADEKA Corporation), Tris(2,4-ditert-butylphenyl) phosphite (available as "ADK STAB 2112" / "ADK STAB 2112RG" manufactured by ADEKA Corporation), Tris(nonylphenyl) phosphite (available as "ADK STAB 1178" manufactured by ADEKA Corporation), Tetra-C12-15-alkyl (propane-2,2-diylbis(4,1-phenylene)) bis(phosphite) (available as "ADK STAB 1500" manufactured by ADEKA Corporation), 2-Ethylhexyl diphenyl phosphite (available as "ADK STAB 135A" manufactured by ADEKA Corporation), Triisodecyl phosphite (available as "ADK STAB 3010" manufactured by ADEKA Corporation), Triphenyl phosphite (available as "ADEKA STAB TPP" manufactured by ADEKA Corporation), 2-Ethylhexyl diphenyl phosphite (available as "ADEKA STAB C" manufactured by ADEKA Corporation), Bis-(2,4-di-tert-butyl-phenyl)-phosphiterythritol diphosphite (available as "Ultranox 626" manufactured by SI Corporation) and the like.

[0067] Examples of phenolic compounds include 1,3,5-tris(3,5-di-tert-butyl-4-hydroxybenzyl)-1,3,5-triazine-2,4,6-(1H,3H,5H)-trione (available as "ADK STAB AO-20" manufactured by ADEKA CORPORATION), 4,4',4''-(1-methylpropanyl-3-ylidene)tris(6-tert-butyl-m-cresol) (available as "ADK STAB AO-30" manufactured by ADEKA CORPORATION), 6,6'-di-tert-butyl-4,4'-butylidenedi-m-cresol (available as "ADK STAB AO-40" manufactured by ADEKA CORPORATION), Octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate (available as "ADK STAB AO-50" manufactured by ADEKA CORPORATION), and pentaerythritol. tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] (available as "ADEKA STAB AO-60" from ADEKA Corporation), 3,9-Bis{2-[3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionyloxy]-1,1-dimethylethyl}-2,4,8,10-tetraoxaspiro[5.5]undecane (available as "ADK STAB AO-80" from ADEKA Corporation), 1,3,5-tris(3,5-di-tert-butyl-4-hydroxyphenylmethyl)-2,4,6-trimethylbenzene (available as "ADK STAB AO-330" from ADEKA Corporation), styrenated phenol (available as "NOCRAC SP, SP-N" from Ouchi Shinko Chemical Industry Co., Ltd.), 2,2'-methylenebis(4-ethyl-6-tert-butylphenol) (available as "NOCRAC NS-5" from Ouchi Shinko Chemical Industry Co., Ltd.), 2,2'-methylenebis(4-methyl-6-tert-butylphenol) (available as "NOCRAC NS-6" from Ouchi Shinko Chemical Industry Co., Ltd.) available as "Nocrac NS-30" manufactured by Ouchi Shinko Chemical Industry Co., Ltd.), 4,4'-butylidenebis(6-tert-butyl-m-cresol) (available as "Nocrac NS-30" manufactured by Ouchi Shinko Chemical Industry Co., Ltd.), 4,4'-thiobis(3-methyl-6-tert-butylphenol) (available as "Nocrac 300" manufactured by Ouchi Shinko Chemical Industry Co., Ltd.), butylated reaction product of p-cresol and dicyclopentadiene (available as "Nocrac PBK" manufactured by Ouchi Shinko Chemical Industry Co., Ltd.), 2,5-di-tert-butylhydroquinone (available as "Nocrac NS-7" manufactured by Ouchi Shinko Chemical Industry Co., Ltd.), and 2,6-di-tert-butyl-4-methylphenol (available as "Nocrac 200 Crystal" manufactured by Ouchi Shinko Chemical Industry Co., Ltd.).

[0068] Examples of the amine compound include a reaction product of diphenylamine and acetone (available as "Nocrac B, BN" manufactured by Ouchi Shinko Chemical Industry Co., Ltd.), N-phenyl-1-naphthylamine (available as "Nocrac PA" manufactured by Ouchi Shinko Chemical Industry Co., Ltd.), alkylated diphenylamine (available as "Nocrac ODA, ODA-N" manufactured by Ouchi Shinko Chemical Industry Co., Ltd.), octylated diphenylamine (available as "Nocrac AD-F" manufactured by Ouchi Shinko Chemical Industry Co., Ltd.), 4,4'-bis(α,α-dimethylbenzyl)diphenylamine (available as "Nocrac CD" manufactured by Ouchi Shinko Chemical Industry Co., Ltd.), p-(p-toluenesulfonylamido)diphenylamine (available as "Nocrac TD" manufactured by Ouchi Shinko Chemical Industry Co., Ltd.), and N,N'-di-2-naphthyl-p-phenylenediamine (available as "Nocrac White" manufactured by Ouchi Shinko Chemical Industry Co., Ltd.). available as "Nocrac 810-NA" from Ouchi Shinko Chemical Industry Co., Ltd.), N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine (available as "Nocrac 6C" from Ouchi Shinko Chemical Industry Co., Ltd.), N-(3-methacryloyloxy-2-hydroxypropyl)-N'-phenyl-p-phenylenediamine (available as "Nocrac 6C" from Ouchi Shinko Chemical Industry Co., Ltd.), Nocrac G-1), 2,2,4-trimethyl-1,2-dihydroquinoline polymer (available as Nocrac 224 (224-S) manufactured by Ouchi Shinko Chemical Industry Co., Ltd.), 6-ethoxy-1,2-dihydro-2,2,4-trimethylquinoline (available as Nocrac AW, AW-N manufactured by Ouchi Shinko Chemical Industry Co., Ltd.), Tetrakis (2,2,6,6-tetramethyl-4-piperidyl) butane-1,2,3,4-tetracarboxylate (available as Adeka Stab LA-57 manufactured by ADEKA Corporation), Tetrakis (1,2,2,6,6-pentamethyl-4-piperidyl) butane-1,2,3,4-tetracarboxylate (available as Adeka Stab LA-52 manufactured by ADEKA Corporation), 1,2,3,4-Butanetetracarboxylic acid,tetramethyl ester, reaction products with 1,2,2,6,6-pentamethyl-4-piperidinol and β,β,β',β'-tetramethyl-2,4,8,10-tetraoxaspiro[5.5]undecane-3,9-diethanol (available as "ADEKASTAB LA-63P" manufactured by ADEKA Corporation), 1,2,3,4-Butanetetracarboxylic acid, tetramethyl ester, reaction products with 2,2,6,6-tetramethyl-4-piperidinol and β,β,β',β'-tetramethyl-2,4,8,10-tetraoxaspiro[5.5]undecane-3,9-diethanol (available as "ADK STAB LA-68" manufactured by ADEKA Corporation), Bis(1,2,2,6,6-pentamethyl-4-piperidyl) sebacate (available as "ADK STAB LA-72" manufactured by ADEKA Corporation), Bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate (available as "ADK STAB LA-77Y" / "ADK STAB LA-77G" manufactured by ADEKA Corporation), Bis(1-undecanoxy-2,2,6,6-tetramethylpiperidin-4-yl)carbonate (available as "ADK STAB LA-81" manufactured by ADEKA Corporation), 1,2,2,6,6-Pentamethyl-4-piperidyl Examples of suitable methacrylate include 2,2,6,6-tetramethyl-4-piperidyl methacrylate (available as "ADK STAB LA-82" manufactured by ADEKA Corporation), 2,2,6,6-tetramethyl-4-piperidyl methacrylate (available as "ADK STAB LA-87" manufactured by ADEKA Corporation), and 2,2,6,6-tetramethylpiperidin-4-yl hexadecanoate and 2,2,6,6-tetramethylpiperidin-4-yl octadecanoate (available as "ADK STAB LA-40MP" or "ADK STAB LA-40Si" manufactured by ADEKA Corporation).

[0069] Examples of sulfur-based compounds include 2-mercaptobenzimidazole (available as "Nocrac MB" manufactured by Ouchi Shinko Chemical Industry Co., Ltd.), 2-mercaptomethylbenzimidazole (available as "Nocrac MMB" manufactured by Ouchi Shinko Chemical Industry Co., Ltd.), zinc salt of 2-mercaptobenzimidazole (available as "Nocrac MBZ" manufactured by Ouchi Shinko Chemical Industry Co., Ltd.), nickel dibutyldithiocarbamate (available as "Nocrac NBC-P(NBC)" manufactured by Ouchi Shinko Chemical Industry Co., Ltd.), dilauryl thiodipropionate (available as "Nocrac 400" manufactured by Ouchi Shinko Chemical Industry Co., Ltd.), 2,2-Bis{"3-(dodecylthio)-1-oxopropoxy"methyl}propane-1,3-diyl bis"3-(dodecylthio)propionate" (available as "ADEKA STAB AO-412S" manufactured by ADEKA Corporation), di(tridecyl) 3,3'-thiodipropionate (available as "ADEKA STAB AO-503" manufactured by ADEKA Corporation). In one embodiment, the sulfur-based compound is a compound that is not a diphenyl sulfone or a compound that is not a diaryl sulfone.

[0070] In one embodiment, 50% by mass or more, 60% by mass or more, 70% by mass or more, 80% by mass or more, 90% by mass or more, 95% by mass or more, 97% by mass or more, 99% by mass or more, 99.5% by mass or more, or substantially 100% by mass of the aromatic polyether resin composition is an aromatic polyether, or Aromatic polyethers and flow agents. In addition, in the case of "substantially 100% by mass", unavoidable impurities may be contained.

[0071] The contents of each component in the aromatic polyether resin composition explained above can also be applied to the blending amounts of each component when preparing the aromatic polyether resin composition.

[0072] The radical amount of the aromatic polyether explained above can also be applied to the radical amount of the aromatic polyether during preparation of the aromatic polyether resin composition (immediately before kneading with the fluidizing agent, etc.).

[0073] Furthermore, the radical amount of the aromatic polyether described above can also be applied to the radical amount per unit mass of the aromatic polyether resin composition. In other words, in one embodiment, the aromatic polyether resin composition has a radical amount of 6.5 × 10 at 25°C, measured using TEMPOL as a standard substance and benzene as a solvent for the standard substance. 15 ~9.0×10 17 spin / g.

[0074] 2. Method for producing aromatic polyether resin composition A method for producing the aromatic polyether resin composition according to one embodiment of the present invention will now be described. The first method involves kneading 0.001 to 10 parts by mass of a fluidizing agent with 100 parts by mass of an aromatic polyether. This makes it possible to obtain an aromatic polyether resin composition that contains an aromatic polyether, has a crystallinity (Xc) of 25% or less, a loss tangent (tanδ) of 2.0 or more, and whose weight average molecular weight (Mw) and loss tangent satisfy the following formula (E1): (Mw)×(tanδ)>130,000···(E1)

[0075] The second method was to measure the amount of radicals at 25°C using TEMPOL as the standard substance and benzene as the solvent. 15 The method includes kneading 0.001 to 10 parts by mass of a fluidizing agent with 100 parts by mass of an aromatic polyether having a spin / g or more. As a result, the amount of radicals measured at 25°C using TEMPOL as the standard substance and benzene as the solvent was 6.5 x 10 15It is possible to obtain an aromatic polyether resin composition containing an aromatic polyether having a crystallinity (Xc) of 25% or less, a loss tangent (tanδ) of 2.0 or more, and a weight average molecular weight (Mw) and loss tangent satisfying the following formula (E1): (Mw)×(tanδ)>130,000···(E1)

[0076] The aromatic polyether, the radical amount, the crystallinity (Xc), the loss tangent (tanδ), the weight average molecular weight (Mw), and the fluidizing agent can be the same as those described in the aromatic polyether resin composition according to one embodiment of the present invention.

[0077] In one embodiment, the amount of the fluidizing agent kneaded is 0.002 parts by weight or more, 0.005 parts by weight or more, 0.01 parts by weight or more, 0.02 parts by weight or more, 0.05 parts by weight or more, 0.1 parts by weight or more, 0.2 parts by weight or more, 0.5 parts by weight or more, or 1.0 parts by weight or more, relative to 100 parts by weight of the aromatic polyether. In one embodiment, the amount of the fluidizing agent kneaded is 10 parts by mass or less, 9.0 parts by mass or less, 8.0 parts by mass or less, 7.0 parts by mass or less, 6.0 parts by mass or less, 5.0 parts by mass or less, 4.0 parts by mass or less, or 3.0 parts by mass or less, relative to 100 parts by mass of the aromatic polyether.

[0078] The method for kneading the fluidizing agent is not particularly limited, and examples thereof include melt kneading using an extruder, etc. The aromatic polyether and the fluidizing agent may be dry-blended using a twin-screw kneader, and the resulting raw material may be compounded. In one embodiment, the molten aromatic polyether is compounded with a fluidizing agent.

[0079] 3.Composite materials A composite material according to one embodiment of the present invention comprises at least one selected from the group consisting of (i) an aromatic polyether resin composition according to one embodiment of the present invention and (ii) an aromatic polyether resin composition obtained by the method for producing an aromatic polyether resin composition according to one embodiment of the present invention, and reinforcing fibers.

[0080] According to the composite material of this embodiment, a composite material having excellent mechanical properties can be obtained. The reason why such an effect is obtained is not entirely clear, but it is presumed that the weight average molecular weight (Mw) and loss tangent of the aromatic polyether resin composition satisfying the above formula (E1) results in excellent mechanical properties, etc. The mechanical properties of the composite material can be evaluated, for example, by the ultimate tensile strength.

[0081] In addition, the radical amount is 6.5 × 10 15 When an aromatic polyether or an aromatic polyether composition having a spin / g or more is used, it is presumed that the aromatic polyether or the aromatic polyether composition interacts with the reinforcing fibers or forms chemical bonds, thereby obtaining a composite material with excellent mechanical properties. Furthermore, it is thought that this can act synergistically with the above-mentioned effects to significantly improve the physical properties of the composite material.

[0082] The aromatic polyether resin composition according to one aspect of the present invention and the method for producing the aromatic polyether resin composition can be applied to the matters described in each aspect.

[0083] [Reinforced fiber] A composite material according to one aspect of the present invention includes reinforcing fibers.

[0084] Examples of reinforcing fibers include carbon fibers, glass fibers, and aramid fibers. These reinforcing fibers may be used alone or in combination of two or more.

[0085] The content of the reinforcing fibers in the composite material is not particularly limited. In one embodiment, the content of the reinforcing fibers is 0.01 parts by mass or more, 0.1 parts by mass or more, 1 part by mass or more, 5 parts by mass or more, 10 parts by mass or more, 20 parts by mass or more, or 30 parts by mass or more, and 500 parts by mass or less, 300 parts by mass or less, 200 parts by mass or less, or 100 parts by mass or less, relative to 100 parts by mass of the aromatic polyether resin composition. When the content of the reinforcing fibers relative to 100 parts by mass of the aromatic polyether resin composition is 0.01 parts by mass or more, the reinforcing effect of the reinforcing fibers is more easily obtained, and when the content is 500 parts by mass or less, the suitability for kneading and molding the composite material is more easily improved.

[0086] In one embodiment, the reinforcing fibers in the composite material have an average fiber length of 5 mm or more. When the average fiber length of the reinforcing fibers is 5 mm or more, they are also called "continuous fibers." The average fiber length is determined by the arithmetic mean of values ​​measured with a vernier caliper.

[0087] In one embodiment, the average fiber diameter of the reinforcing fibers is 1 to 30 μm. From the viewpoints of dispersibility of the reinforcing fibers in the aromatic polyether resin composition and the surface smoothness and mechanical strength of the molded product described below, the average fiber diameter of the reinforcing fibers is preferably 3 to 25 μm, 6 to 20 μm, or even 6 to 13 μm. The average fiber diameter of the reinforcing fibers is determined as the arithmetic mean of values ​​measured in accordance with JIS R 7607:2000.

[0088] In one embodiment, 50% by mass or more, 60% by mass or more, 70% by mass or more, 80% by mass or more, 90% by mass or more, 95% by mass or more, 97% by mass or more, 99% by mass or more, 99.5% by mass or more, or substantially 100% by mass of the reinforcing fibers are one or more types selected from the group consisting of carbon fibers, glass fibers, and aramid fibers. In addition, when the content is "substantially 100% by mass", it may contain inevitable impurities.

[0089] In one embodiment, the carbon fiber comprises one or more selected from the group consisting of PAN-based carbon fiber, pitch-based carbon fiber, thermosetting carbon fiber, phenolic carbon fiber, vapor-grown carbon fiber, and recycled carbon fiber (RCF). In one embodiment, 50% by mass or more, 60% by mass or more, 70% by mass or more, 80% by mass or more, 90% by mass or more, 95% by mass or more, 97% by mass or more, 99% by mass or more, 99.5% by mass or more, or substantially 100% by mass of the carbon fibers are one or more types selected from the group consisting of PAN-based carbon fibers, pitch-based carbon fibers, thermosetting carbon fibers, phenol-based carbon fibers, vapor-grown carbon fibers, and recycled carbon fibers (RCF). In addition, when the content is "substantially 100% by mass", it may contain inevitable impurities.

[0090] The carbon fibers may be treated with a sizing agent. The sizing agent can bind the reinforcing fibers into a bundle. Reinforcing fibers treated with a sizing agent have the sizing agent adhered to their surfaces. The sizing agent is not particularly limited, and examples include epoxy-based sizing agents, urethane-based sizing agents, and polyamide-based sizing agents. Aromatic polyethers can also be used as the sizing agent. These sizing agents may be used alone or in combination of two or more. Reinforcing fibers may also be used that have not been treated with a sizing agent. The sizing agent may be used in combination with a silane coupling agent such as aminosilane, isocyanate silane, or acrylic silane.

[0091] The type of glass fiber is not particularly limited, and glass fibers of various compositions such as E glass, low dielectric glass, silica glass, etc. can be selected and used depending on the purpose and application. The average fiber diameter of the glass fiber is preferably 5 to 20 μm, more preferably 7 to 17 μm, and the single fiber can be used.

[0092] The glass fibers may also be treated with a sizing agent. The sizing agent can bind the glass fibers into bundles. The glass fibers treated with a sizing agent have the sizing agent attached to their surfaces. The sizing agent is not particularly limited, and examples thereof include epoxy-based sizing agents, urethane-based sizing agents, and vinyl acetate-based sizing agents. Aromatic polyethers can also be used as the sizing agent. These sizing agents may be used alone or in combination of two or more. Glass fibers that have not been treated with a sizing agent may also be used. The sizing agent may be used in combination with a silane coupling agent such as aminosilane, isocyanate silane, or acrylic silane.

[0093] The composite material may contain other components that do not fall under the category of the aromatic polyether resin composition and the reinforcing fiber. The other components are not particularly limited, and examples thereof include other resins that are not aromatic polyethers. Examples of other resins include fluororesins such as polytetrafluoroethylene. One type of other component may be used alone, or two or more types may be used in combination.

[0094] In one embodiment, at least 50%, at least 60%, at least 70%, at least 80%, at least 90%, at least 95%, at least 97%, at least 99%, at least 99.5%, and at most 100%, at most 99.9%, or substantially 100%, by weight of the composite material is An aromatic polyether resin composition and a reinforcing fiber, The aromatic polyether resin composition, the reinforcing fibers, and the other components described above. In addition, when the content is "substantially 100% by mass", it may contain inevitable impurities.

[0095] In one embodiment, the reinforcing fibers are in the form of one or more selected from the group consisting of chopped strands, woven fabrics, nonwoven fabrics, and unidirectional materials (also referred to as "UD materials"), which further improves the strength of the composite material.

[0096] In one embodiment, the composite material may be a fiber composite material containing the aromatic polyether resin composition as a matrix and reinforcing fibers. The fiber composite material may be a so-called fiber-reinforced thermoplastic (FRTP).

[0097] The method for producing the composite material (composite method) is not particularly limited. For example, a method of melt-kneading an aromatic polyether resin composition with reinforcing fibers, or a method of melting and impregnating an aggregate of reinforcing fibers with an aromatic polyether resin composition in one or more forms selected from the group consisting of powder, film, and pellets, can be used. A twin-screw kneader may be used to side-feed the reinforcing fibers into the aromatic polyether resin composition. The aggregate of reinforcing fibers may be in one or more forms selected from the group consisting of woven fabric, nonwoven fabric, and unidirectional material (also called "UD material"). In these forms, the average fiber length of the reinforcing fibers may be 5 mm or more. That is, the reinforcing fibers may be continuous fibers.

[0098] Pellets of the composite material may be produced, and the pellets can be used as a raw material for producing a molded article, which will be described later. In one embodiment, a method for producing pellets includes cutting reinforcing fibers into chopped strands and then adding an aromatic polyether resin composition to the reinforcing fibers. The short fibers and the aromatic polyether resin composition are mixed and granulated to produce pellets (also referred to as "short fiber pellets"). In one embodiment, a method for producing pellets involves immersing a roving of reinforcing fibers in a molten aromatic polyether resin composition, pultrusion molding the roving, and then cutting the roving into a desired pellet length to produce pellets (also referred to as "long fiber pellets"). When producing long fiber pellets as described above, breakage of the reinforcing fibers can be suppressed.

[0099] 4. Molded body A molded article according to one embodiment of the present invention comprises at least one selected from the group consisting of (i) an aromatic polyether resin composition according to one embodiment of the present invention, and (ii) an aromatic polyether resin composition obtained by a method for producing an aromatic polyether resin composition according to one embodiment of the present invention.

[0100] According to the molded article of this embodiment, a molded article having excellent mechanical properties can be obtained. Although the reason for such effects is not entirely clear, excellent molding processability is likely to be achieved by having a crystallinity (Xc) of 25% or less and a loss tangent (tanδ), which is an index of the viscosity of the resin when molten, of 2.0 or more. Furthermore, it is presumed that excellent mechanical properties are also achieved by having the weight-average molecular weight (Mw) and loss tangent satisfy the above formula (E1). These factors act synergistically to facilitate molding process when producing molded articles and to significantly improve the physical properties of the molded articles.

[0101] In addition, the radical amount is 6.5 × 10 15 When an aromatic polyether or an aromatic polyether composition having a spin / g or more is used, it is presumed that the aromatic polyether or the aromatic polyether composition interacts with the reinforcing fibers or forms chemical bonds, thereby obtaining a molded article having excellent mechanical properties. Furthermore, it is thought that this effect acts synergistically with the above-mentioned effects, thereby significantly improving the physical properties of the molded article.

[0102] The matters described in each aspect can be applied to the aromatic polyether resin composition and the method for producing the aromatic polyether resin composition according to one aspect of the present invention.

[0103] The molded article according to one aspect of the present invention may contain reinforcing fibers. The reinforcing fibers can be applied to the composite material according to one embodiment of the present invention.

[0104] In one embodiment, 50% by mass or more, 60% by mass or more, 70% by mass or more, 80% by mass or more, 90% by mass or more, 95% by mass or more, 97% by mass or more, 99% by mass or more, 99.5% by mass or more, and 100% by mass or less, 99.9% by mass or less, or substantially 100% by mass of the molded body is an aromatic polyether resin composition; An aromatic polyether resin composition and a reinforcing fiber, The aromatic polyether resin composition, the reinforcing fibers, and the other components described above. In addition, when the content is "substantially 100% by mass", it may contain inevitable impurities.

[0105] The shape of the molded article according to one embodiment and another embodiment of the present invention is not particularly limited. In one embodiment, the molded body is an injection molded body, an extrusion molded body, or a compression molded body (also called a "press molded body").

[0106] The method for producing the molded article according to one embodiment of the present invention is not particularly limited, and for example, a molded article can be produced by molding the composite material according to one embodiment of the present invention (which may be in the form of pellets as described above). Known methods such as injection molding, extrusion molding, and blow molding can be used for molding. The composite material can also be press-molded, and known methods such as cold pressing and hot pressing can be used. Furthermore, the composite material can be used as a resin composite material for a 3D printer and molded using a 3D printer.

[0107] The applications of the aromatic polyether resin composition, composite material, and molded article of the present invention are not particularly limited, and can be widely applied to various applications requiring mechanical properties, for example. The composition of the present invention is suitable, for example, as a metal replacement material, particularly for applications requiring heat resistance, solvent resistance, and durability. More specifically, it is suitable for, for example, bearings, gaskets, gears, structural materials, automotive parts, battery-related parts, semiconductor manufacturing parts, aircraft structural members, medical instruments, etc. [Example]

[0108] The present invention will be explained in more detail below by showing examples, but the scope of the present invention is not limited to the descriptions of these examples in any way.

[0109] 1. Preparation of aromatic polyether A-1 Nitrogen gas was circulated into a 240 L reactor equipped with a stirrer, thermometer, nitrogen inlet, and a water collection vessel connected to a condenser. 132.47 kg of diphenyl sulfone (Sino-High Chemical Industries, Ltd.) was gradually added, and the temperature was raised to 160 °C. Once melted, 27.70 kg (110 mol) of 4,4'-dichlorobenzophenone (Sino-High Chemical Industries, Ltd.), 8.13 kg (47 mol) of 2,6-dichlorobenzonitrile, 16.85 kg (153 mol) of hydroquinone, and 22.20 kg (160 mol) of potassium carbonate (AGC Corporation, fine powder) were sequentially added.

[0110] The reaction mixture was reacted under the following temperature control, and then 6.15 g (25 mol) of 4,4'-dichlorobenzophenone was added as a reaction terminator. <Temperature control> (1) At a stirring speed of 100 rpm, the temperature was raised from 160°C to 200°C over 90 minutes. (2) Hold at 200°C for 60 minutes (3) Heat the temperature from 200°C to 250°C over 80 minutes (4) Hold at 250°C for 60 minutes (5) The temperature was increased from 250°C to 290°C over 100 minutes, and the stirring speed was changed to 64 rpm when the temperature reached 270°C. (6) Hold at 290°C for 120 minutes (7) Add the reaction stopper and keep stirring at 100 rpm for 42 minutes.

[0111] After the reaction was completed, the contents were transferred to a SUS tray, cooled to room temperature, and solidified. The product was coarsely pulverized and crushed in a pin mill (160UPZ manufactured by Hosokawa Micron Corporation), washed with acetone, an aqueous oxalic acid solution, and water in that order, and then vacuum dried to obtain a powdery aromatic polyether A-1.

[0112] 2. Preparation of aromatic polyether A-2 Nitrogen gas was circulated through a 240L reactor equipped with a stirrer, thermometer, nitrogen inlet, and a water collection vessel connected to a cooling tube. 132.47 kg of diphenyl sulfone (Sino-High Chemical Co., Ltd.) was gradually added, and the temperature was raised to 160°C. Once melted, 27.70 kg (110 mol) of 4,4'-dichlorobenzophenone (Sino-High Chemical Co., Ltd.), 8.13 kg (47 mol) of 2,6-dichlorobenzonitrile (Yangzhou Tianchen Fine Chemical Co., Ltd.), 16.85 kg (153 mol) of hydroquinone (UBE Corporation), and 22.20 kg (161 mol) of potassium carbonate (AGC Corporation, fine powder) were sequentially added. After the reaction was completed under temperature control, 6.15 kg (25 mol) of 4,4'-dichlorobenzophenone was added as a reaction terminator.

[0113] <Temperature control> (1) At a stirring speed of 100 rpm, the temperature was raised from 160°C to 200°C over 90 minutes. (2) Hold at 200°C for 60 minutes (3) Heat the temperature from 200°C to 250°C over 80 minutes (4) Hold at 250°C for 60 minutes (5) The temperature was raised from 250°C to 290°C over 110 minutes, and the stirring speed was changed to 64 rpm when the temperature reached 270°C. (6) The temperature was maintained at 290°C for 100 minutes, and the stirring speed was increased to 100 rpm after 30 minutes. (7) Add the reaction stopper and hold for 70 minutes.

[0114] After the reaction was completed, the contents were transferred to a SUS tray, cooled to room temperature, and solidified. The product was coarsely pulverized and crushed with a pin mill (160UPZ manufactured by Hosokawa Micron Corporation), washed with acetone, an aqueous oxalic acid solution, and water in that order, and then vacuum dried to obtain a powdery aromatic polyether A-2.

[0115] 3. Evaluation of aromatic polyethers The radical amount of the obtained aromatic polyether (measured at 25°C using TEMPOL as the standard substance and benzene as the solvent for the standard substance) was measured by ESR (electron spin resonance) under the following conditions and procedures. The results are shown in Table 1.

[0116] [ESR measurement conditions] ESR equipment: JEOL Ltd. JESFA200 model ·ESR sample tube diameter: 5mm Microwave output: 0.5mW Modulated magnetic field: 0.3mT ·Time constant: 0.03 seconds Magnetic field range: 328~344mT Measurement time: 60 seconds ·Mn strength: 650 ·Measurement temperature: 25℃

[0117] [procedure] TEMPOL (4-hydroxy-2,2,6,6-tetramethylpiperidine-1-oxyl) was dissolved in benzene at a concentration of 5 μM, and 400 μL was added to an ESR sample tube. ESR was measured under the above-mentioned measurement conditions. The integral of the peak derived from TEMPOL obtained was divided by the integral of the Mn peak to normalize (integral value A). The measurement sample was then weighed (weight value B), loaded into an ESR sample tube, and ESR was measured under the above-mentioned measurement conditions. The integral of the peak derived from the sample obtained was divided by the integral of the Mn peak to normalize (integral value C). The obtained values ​​of A, B, and C were used to calculate the amount of radicals (radical concentration) per unit mass of the sample using the following formula. Radical amount [spin / g] = (5 × 10 -6 x400x10 -6 x6.02x10 23 ×C) / (A×B)

[0118] [Table 1]

[0119] Example 1 1. Production of aromatic polyether resin composition 100 parts by mass of the powdered aromatic polyether A-1 obtained in Production Example 1 and 3 parts by mass of fluidizer B-1 ("NA-21" manufactured by ADEKA Corporation) were dry-blended to obtain a dry-blended raw material. The dry-blended raw material was melt-kneaded using a twin-screw extruder ("Process-11" manufactured by Thermo Fisher Scientific, cylinder volume 20 cc) with an 11 mm cylinder diameter at a screw rotation speed of 200 rpm and a set temperature of 370°C. The dry-blended raw material was fed into the base of the twin-screw extruder (upstream of the screws) at a rate of 6 g per minute. The residence time in the twin-screw extruder was 3.5 minutes. The strands discharged from the twin-screw extruder were cooled in water and then pelletized using a pelletizer to obtain an aromatic polyether resin composition.

[0120] 2. Evaluation The weight average molecular weight (Mw), loss tangent (tan δ), crystallinity (Xc), and radical content of the resulting aromatic polyether resin composition were evaluated by the following methods. The results are shown in Table 2.

[0121] (1) Weight average molecular weight (Mw) The weight average molecular weight (Mw) of the aromatic polyether resin composition was measured by GPC (gel permeation chromatography) under the following conditions and procedures.

[0122] [GPC measurement conditions] GPC equipment: HLC-8420GPC (Tosoh Corporation) GPC columns: Use a TSK gel guard column HH (4.6 mm I.D. x 35 mm) and two TSK gel Super HM-M (6 mm I.D. x 150 mm) in series in that order. Solvent: PFP / CHCl3 mixed solvent ·Temperature: 40℃ ·Flow rate: 0.6mL / min ·Injection amount: 20μL Calibration curve: Calibration with PS standard

[0123] [procedure] The aromatic polyether resin composition was dissolved in pentafluorophenol (PFP), and the GPC distribution was measured under the above-mentioned measurement conditions. In the obtained GPC distribution, the object to be analyzed was selected from the group consisting of a 1000-kJ / kg sample with a horizontal axis of LogM. 6 The weight average molecular weight (Mw) was calculated from a calibration curve using a polystyrene (PS) standard, assuming that the main peak appeared in the following range:

[0124] (2) Loss tangent (tanδ) The loss tangent of the aromatic polyether resin composition was measured using a viscoelasticity measuring device under the following conditions and procedures.

[0125] [Measurement conditions] Viscoelasticity measuring device: MCR302 (manufactured by Anton Paar) Jig: Shaft for disposable measuring system D-CP / PP25 Disposable dish: Φ41mm Disposable parallel plate: Φ25mm ·Temperature: 350℃ Preheat time: 3 minutes Gap: 0.8mm ·Time: 300min Shear strain: 1% ·Angular frequency: 2.76rad / s

[0126] [procedure] A disk-shaped aromatic polyether resin composition was placed on a disposable dish and measured under the above conditions. For the measurement, the disk was sandwiched between a disposable dish and a disposable plate with a gap of 0.8 mm, preheated, and then trimmed to a diameter of 25 mm. The loss tangent was measured in a molten state for 5 min.

[0127] The "discs" were obtained in the following manner. The aromatic polyether resin composition was filled into a mold and pressed at a temperature of 350° C. using a vacuum press (IMC-6215 manufactured by Imoto Machinery Co., Ltd.). After pressing, it was quenched at 25° C. and molded into a disk having a diameter of 25 mm and a thickness of 1.0 mm.

[0128] (3) Crystallinity (Xc) The crystallinity (Xc) of the aromatic polyether resin composition was measured by wide-angle X-ray diffraction under the following conditions and procedures. [Measurement conditions] X-ray scattering device: NANOPIX (Rigaku Corporation) Detector: HyPix-3000 Camera distance: 63mm Exposure time: 2 min Voltage: 40kV ·Current: 30mA ·Wavelength: 0.154nm -1 (Cu-Kα radiation) [procedure] A disk of the amorphous aromatic polyether resin composition (a) obtained in the same manner as the disk used in the evaluation of the loss tangent and a disk of the aromatic polyether resin composition (b) crystallized to the maximum extent by slow cooling were measured under the above conditions.

[0129] The diffraction intensity profile was obtained by circularly integrating the obtained two-dimensional diffraction pattern. From the obtained diffraction intensity profile, the areas of the diffraction intensities (a) and (b) were calculated in the range of 2θ = 5° to 30°. The crystallinity was calculated from the area ratio of the area of ​​(b) to the area obtained by subtracting the area of ​​(a) derived from amorphous from the area of ​​(b).

[0130] The "disk of aromatic polyether resin composition (b)" was obtained by the following method. The aromatic polyether resin composition was filled into a mold and pressed at a temperature of 350° C. using a vacuum press (IMC-6215 manufactured by Imoto Machinery Co., Ltd.). After pressing, the mixture was annealed at 180° C. for 1 hour while maintaining pressure, and a disk with a diameter of 25 mm and a thickness of 1.0 mm was molded.

[0131] (4) Radical amount The amount of radicals in the aromatic polyether resin composition was measured in the same manner as in "3. Evaluation of aromatic polyether" above, except that the obtained aromatic polyether resin composition was used as the measurement sample instead of the aromatic polyether.

[0132] Example 2 An aromatic polyether resin composition was obtained in the same manner as in Example 1, except that a dry-blended raw material obtained by dry-blending 100 parts by mass of the powdered aromatic polyether A-2 obtained in Production Example 2 and 0.5 parts by mass of fluidizer B-2 (Lithium Stearate, manufactured by Tokyo Chemical Industry Co., Ltd.) was used. The weight-average molecular weight (Mw), loss tangent (tanδ), crystallinity (Xc), and radical content of the obtained aromatic polyether resin composition were evaluated in the same manner as in Example 1. The results are shown in Table 2.

[0133] Example 3 An aromatic polyether resin composition was obtained in the same manner as in Example 1, except that a dry-blended raw material obtained by dry-blending 100 parts by mass of the powdered aromatic polyether A-2 obtained in Production Example 2 with 1 part by mass of fluidizer B-2 (Lithium Stearate, manufactured by Tokyo Chemical Industry Co., Ltd.) was used. The weight-average molecular weight (Mw), loss tangent (tanδ), crystallinity (Xc), and radical content of the obtained aromatic polyether resin composition were evaluated in the same manner as in Example 1. The results are shown in Table 2.

[0134] (Comparative Example 1) An aromatic polyether resin composition was obtained in the same manner as in Example 1, except that the addition of the fluidizing agent was omitted. The weight average molecular weight (Mw), loss tangent (tanδ), crystallinity (Xc), and radical content of the obtained aromatic polyether resin composition were evaluated in the same manner as in Example 1. The results are shown in Table 2.

[0135] (Comparative Example 2) An aromatic polyether resin composition was obtained in the same manner as in Example 2, except that the addition of the fluidizing agent was omitted. The weight average molecular weight (Mw), loss tangent (tanδ), crystallinity (Xc), and radical content of the obtained aromatic polyether resin composition were evaluated in the same manner as in Example 1. The results are shown in Table 2.

[0136] [Table 2]

[0137] The aromatic polyether resin compositions of Examples 1 to 3 had a loss tangent (tanδ) of 2.0 or more and a product of the weight average molecular weight (Mw) and the loss tangent of greater than 130,000, which indicates that the weight average molecular weight was increased while maintaining a loss tangent (tanδ) of 2.0 or more. These aromatic polyether resin compositions had a loss tangent (tan δ) of 2.0 or more, and therefore had good fluidity. Furthermore, these aromatic polyether resin compositions have a sufficient weight average molecular weight (Mw) within a range that does not impair molding processability, and furthermore, the amount of radicals measured at 25°C using benzene as the standard solvent is 6.5 × 10 15 Since the aromatic polyether resin composition contains an aromatic polyether having a spin / g or more, it is expected to exhibit excellent interfacial adhesive strength to the reinforcing fiber and have excellent mechanical properties. Similarly, the amount of radicals measured at 25°C using benzene as the solvent of the standard substance was 6.5 × 10 15 Since the tensile strength is greater than or equal to spin / g, it is expected to exhibit excellent interfacial adhesive strength to the reinforcing fibers and have excellent mechanical properties.

[0138] The aromatic polyether resin compositions of Comparative Examples 1 and 2 had a loss tangent (tanδ) of less than 2 and a product of the weight average molecular weight (Mw) and the loss tangent of not more than 130,000. These aromatic polyether resin compositions had poor fluidity.

[0139] Example 4 Evaluation of molding processability of aromatic polyether resin compositions 0.1 g of the aromatic polyether resin composition obtained in Example 1 was sandwiched between iron plates and pressed using a vacuum press (IMC-6215 manufactured by Imoto Machinery Co., Ltd.) at a temperature of 360°C, a load of 20 kN, a preheating time of 1 minute, and a pressure holding time of 1 minute. After pressing, the mixture was rapidly cooled to 25°C to form a film, thereby obtaining a molded article of the aromatic polyether resin composition. The thickness of the obtained molded article is shown in Table 3.

[0140] (Comparative Example 3) A molded article of the aromatic polyether resin composition was obtained in the same manner as in Example 4, except that the aromatic polyether resin composition obtained in Comparative Example 1 was used instead of the aromatic polyether resin composition obtained in Example 1. The thickness of the obtained molded article is shown in Table 3.

[0141] [Table 3]

[0142] In the production of the molded article of Example 4 using the aromatic polyether resin composition of Example 1, which had a (Mw) × (tanδ) value of 150,000 or more, the aromatic polyether resin composition had excellent fluidity and was able to be molded into a thin film. That is, the aromatic polyether resin composition of Example 1 had excellent moldability. In the production of the molded article of Comparative Example 3 using the aromatic polyether resin composition of Comparative Example 1, in which the value of (Mw) × (tanδ) was 130,000 or less, the flowability of the aromatic polyether resin composition was poor, and a thicker film was obtained compared to the film of Example 4. That is, it was difficult to improve the molding processability of the aromatic polyether resin composition of Comparative Example 1.

Claims

1. Contains an aromatic polyether, The crystallinity (Xc) is 25% or less, The loss tangent (tanδ) is 2.0 or more, and The weight average molecular weight (Mw) and the loss tangent satisfy the following formula (E1): Aromatic polyether resin composition. (Mw)×(tanδ)>130,000...(E1)

2. The aromatic polyether or the aromatic polyether resin composition has a radical amount of 6.5×10 at 25° C., measured using TEMPOL as a standard substance and benzene as a solvent for the standard substance. １５ The aromatic polyether resin composition according to claim 1, wherein the viscosity is 100 s / g or more.

3. 3. The aromatic polyether resin composition according to claim 1, wherein the weight average molecular weight is 50,000 or more.

4. 3. The aromatic polyether resin composition according to claim 1, further comprising 0.001 to 10 parts by mass of a fluidizing agent relative to 100 parts by mass of the aromatic polyether.

5. The aromatic polyether resin composition according to claim 4, wherein the fluidizing agent comprises at least one selected from the group consisting of organic fluidizing agents and inorganic fluidizing agents.

6. A method for producing the aromatic polyether resin composition according to claim 1 or 2, comprising: The aforementioned production method, which comprises kneading 0.001 to 10 parts by mass of a fluidizing agent with 100 parts by mass of the aromatic polyether.

7. A composite material comprising the aromatic polyether resin composition according to claim 1 or 2 and reinforcing fibers.

8. The composite material according to claim 7, wherein the reinforcing fiber is contained in an amount of 10 to 300 parts by mass relative to 100 parts by mass of the aromatic polyether resin composition.

9. 8. The composite material of claim 7, wherein the reinforcing fibers comprise one or more selected from the group consisting of carbon fibers, glass fibers, and aramid fibers.

10. 8. The composite material according to claim 7, wherein the reinforcing fibers have a fiber length of 5 mm or more.

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