resin composition

Abstract

To provide a resin composition that exhibits excellent flame retardancy even without containing silicon-based compounds, and also possesses excellent transparency and mechanical properties. [Solution] A resin composition having a mass ratio of polyarylate resin (A) to polycarbonate resin (B) of 100 / 0 to 25 / 75, containing 0.05 to 3.2 parts by mass of an organometallic salt (C) per 100 parts by mass of the total amount of polyarylate resin (A) and polycarbonate resin (B), and free of silicon-based compounds.

Description

[Technical Field]

[0001] The present invention relates to a resin composition (particularly a polyarylate resin composition) that is excellent in flame retardancy, transparency, and mechanical properties. [Background technology]

[0002] Mixtures of polyarylate and polycarbonate resins are widely used as housing materials for displays, lighting equipment, and containers for pharmaceuticals, etc., due to their excellent heat resistance, transparency, moldability, mechanical strength, and dimensional stability. These materials are required to possess the above properties while also being flame-retardant.

[0003] As a method for improving the flame retardancy of a mixture of polyarylate resin and polycarbonate resin, Patent Document 1 uses a brominated bisphenol carbonate-based flame retardant. However, due to mold corrosion caused by brominated flame retardants and environmental considerations, there is a desire to use flame retardants that do not contain halogen compounds such as brominated or chlorine-based compounds.

[0004] Furthermore, while Patent Document 2 uses a silicon-based flame retardant, a higher polyarylate ratio leads to a higher processing temperature, which in turn causes molding defects and loss of transparency due to the decomposition of the silicon-based flame retardant.

[0005] Furthermore, while Patent Document 3 achieves V-0 at a thickness of 1.6 mm by using perfluoroalkanedisulfonic acid metal salts (potassium or lithium), transparency may be impaired depending on the mixing ratio of polyarylate and polycarbonate and the amount of perfluoroalkanedisulfonic acid metal salts used. Additionally, the presence of fluorine raises concerns not only from an environmental perspective but also from the standpoint of production sustainability, such as the possibility of production bans due to PFAS regulations.

[0006] Patent document 4 describes a method for improving the flame retardancy of polycarbonate resin by using two organometallic salts that do not contain fluorine and a siloxane oligomer in combination, achieving V-0 at a thickness of 3.0 mm, but V-0 at even thinner walls is desired. Furthermore, it is stated that potassium diphenylsulfonate alone has little flame retardant effect. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Japanese Patent Publication No. 2009-235362 [Patent Document 2] Japanese Patent Publication No. 2009-275062 [Patent Document 3] Japanese Patent Publication No. 2009-256429 [Patent Document 4] Special Publication No. 2009-526899 [Overview of the Initiative] [Problems that the invention aims to solve]

[0008] The present invention aims to solve the above problems by providing a resin composition that is sufficiently flame-retardant even without containing silicon-based compounds, and also sufficiently transparent and mechanically sound.

[0009] The present invention also aims to provide a resin composition that exhibits sufficient flame retardancy, transparency, and mechanical properties even without containing silicon-based compounds or halogen-based compounds. [Means for solving the problem]

[0010] As a result of diligent research to solve these problems, the present inventors discovered that the above objective can be achieved by blending an organometallic salt (C) with a polyarylate resin (A) or a mixture of the polyarylate resin (A) and a polycarbonate resin (B), and thus arrived at the present invention.

[0011] In other words, the gist of this invention is as follows: <1> The mass ratio of polyarylate resin (A) to polycarbonate resin (B) is 100 / 0 to 25 / 75. The total amount of the polyarylate resin (A) and the polycarbonate resin (B) is 100 parts by mass, and the organic metal salt (C) is contained in 0.05 to 3.2 parts by mass. A resin composition that does not contain silicon-based compounds. <2> The organometallic salt (C) is a metal salt of an aromatic sulfonic acid ester. <1> The resin composition described above. <3> The organometallic salt (C) is a metal salt of an aromatic sulfonic acid ester represented by general formula (1). <1> or <2> The resin composition described above. [ka] (In the formula, n is an integer greater than or equal to 0; m1 is an integer between 0 and 5 (inclusive); m2 is an integer between 0 and 4 (inclusive); R1 and R2 are each independently selected from the group consisting of alkyl groups or vinyl groups having 1 to 6 carbon atoms; M represents a metal.) <4> The organometallic salt (C) is a metal salt of a diphenylsulfonic acid ester in the general formula (1) where n is 1. <3> The resin composition described above. <5> The metal of the organometallic salt (C) is an alkali metal. <1> ~ <4> A resin composition as described in any of the following. <6> The MFR of the aforementioned polycarbonate resin (B) is 50 g / 10 min or less. <1> ~ <5> A resin composition as described in any of the following. <7> The metal of the organometallic salt (C) is one or more metals selected from the group consisting of Li, Na, and K. <1> ~ <6> A resin composition as described in any of the following. <8> The content of the organometallic salt (C) is 0.05 to 2.5 parts by mass per 100 parts by mass of the total amount of the polyarylate resin (A) and the polycarbonate resin (B). The aforementioned n is 0 or 1, The R1 and R2 are each independently selected from the group consisting of alkyl groups having 1 to 6 carbon atoms. The m1 and m2 are each independently an integer of 0 to 2. The M is one or more metals selected from Li, Na, and K. The resin composition according to <3>, wherein the MFR of the polycarbonate resin (B) is 1 to 32 g / 10 min. <9> The content of the organometallic salt (C) is 0.25 to 1.8 parts by mass with respect to 100 parts by mass of the total amount of the polyarylate resin (A) and the polycarbonate resin (B). The n is 1. The R1 and R2 are each independently selected from the group consisting of alkyl groups having 1 to 6 carbon atoms. The m1 and m2 are each independently an integer of 0 to 2. The M is one or more metals selected from Li, Na, and K. The polyarylate resin contains bisphenol A as a monomer component. The resin composition according to <3>, wherein the MFR of the polycarbonate resin (B) is 1 to 25 g / 10 min. <10> A molded body obtained by molding the resin composition according to any one of <1> to <9>.

Effects of the Invention

[0012] According to the present invention, a resin composition having sufficiently excellent flame retardancy, transparency, and mechanical properties can be obtained without containing a silicon-based compound or without containing a silicon-based compound and a halogen-based compound.

Modes for Carrying Out the Invention

[0013] The resin composition of the present invention comprises a polyarylate resin (A) and an organometallic salt (C), and may further contain a polycarbonate resin (B), or may not contain one. The resin composition of the present invention may also be referred to as a "polyarylate resin composition," and as a whole, it is thermoplastic. The resin composition of the present invention will be described in detail below.

[0014] [Polyarylate resin] The polyarylate resin (A) used in the present invention is not particularly limited as long as it is an amorphous polyarylate resin. In the present invention, "amorphous polyarylate resin" means a polyarylate resin in which, when measured using a differential scanning calorimeter, no endothermic peak originating from the latent heat of fusion of the crystal or an exothermic peak originating from the latent heat of crystallization is observed. However, the amorphous polyarylate resin used in the present invention does not include so-called crystalline polymers having mesogenic groups.

[0015] Examples of polyarylate resins (A) include those containing aromatic dicarboxylic acid components and divalent phenol components as constituent components (or monomer components).

[0016] Examples of aromatic dicarboxylic acid components include terephthalic acid, isophthalic acid, phthalic acid, chlorophthalic acid, nitrophthalic acid, 2,5-naphthalenedicarboxylic acid, 2,6-naphthalenedicarboxylic acid, 2,7-naphthalenedicarboxylic acid, 1,5-naphthalenedicarboxylic acid, methylterephthalic acid, 4,4'-biphenyldicarboxylic acid, 2,2'-biphenyldicarboxylic acid, 4,4'-diphenyletherdicarboxylic acid, 4,4'-diphenylmethanedicarboxylic acid, 4,4'-diphenylsulfondicarboxylic acid, 4,4'-diphenylisopropylidenedicarboxylic acid, 1,2-bis(4-carboxyphenoxy)ethane, and 5-sodium sulfisophthalic acid. These aromatic dicarboxylic acid components may be used individually or in combination of two or more. The carboxyl group of the aromatic dicarboxylic acid component may be an acid halide group. An acid halide group is a group in which the hydroxyl group of a carboxyl group is replaced by a halogen atom.

[0017] Among such aromatic dicarboxylic acid components, it is preferable to use at least one selected from the group consisting of terephthalic acid and isophthalic acid, from the viewpoint of further improving flame retardancy, transparency and mechanical properties, obtaining a resin composition with excellent moldability, obtaining a resin molded article with excellent mechanical properties and chemical resistance, and reducing the molding shrinkage rate of the resin molded article. It is more preferable to use terephthalic acid and isophthalic acid in combination. When terephthalic acid and isophthalic acid are used in combination, the mixed molar ratio of terephthalic acid and isophthalic acid (terephthalic acid / isophthalic acid) is preferably 80 / 20 to 20 / 80 (mol%), more preferably 70 / 30 to 25 / 75 (mol%), and even more preferably 60 / 40 to 30 / 70 (mol%). If the aromatic dicarboxylic acid component includes at least one selected from the group consisting of terephthalic acid and isophthalic acid, the total content of terephthalic acid and isophthalic acid is preferably 50 mol% or more (particularly 50 to 100 mol%), more preferably 70 mol% or more (particularly 70 to 100 mol%), even more preferably 90 mol% or more (particularly 90 to 100 mol%), sufficiently preferably 95 mol% or more (particularly 95 to 100 mol%), more certainly preferably 98 mol% or more (particularly 98 to 100 mol%), and particularly preferably 100 mol%, relative to the total amount of the aromatic dicarboxylic acid component. The total content of terephthalic acid and isophthalic acid may also be the total content of terephthalic acid and isophthalic acid residues.

[0018] In this specification, flame retardancy refers to the property of strip-shaped molded articles (1.6 mm and 3.2 mm thick) obtained using a resin composition that are difficult to burn. In the present invention, both the strip-shaped molded articles with a thickness of 1.6 mm and 3.2 mm show evaluation results of V-0, V-1, or V-2 in the UL94 test, preferably showing evaluation results of V-0 or V-1, and more preferably showing evaluation results of V-0. Transparency refers to the property of a plate-shaped molded body obtained using a resin composition having a higher transmittance. The transmittance is based on light with wavelengths of 400 nm to 700 nm and is the transmittance of a 3 mm thick plate-shaped molded body. Mechanical properties refer to the characteristic of a plate-shaped molded body (test piece) obtained using a resin composition having a higher Charpy impact strength.

[0019] Examples of divalent phenol components include resorcinol, 1,1-bis(4-hydroxyphenyl)ethane, 2,2-(4-hydroxyphenyl)butane, 2,2-(4-hydroxyphenyl)-4-methylpentane, 2,2-bis(4-hydroxyphenyl)propane (bisphenol A), 2,2-bis(4-hydroxy-3,5-dimethylphenyl)propane, 2,2-bis(4-hydroxy-3-methylphenyl)propane, 2,2-bis(4-hydroxy-3,5-dibromophenyl)propane, 2,2-bis(4-hydroxy-3,5-dichlorophenyl)propane, 4,4'-dihydroxydiphenyl sulfone, 4,4'-dihydroxydiphenyl ether, 4,4'-dihydroxydiphenyl sulfide, 4,4'- Examples include dihydroxydiphenyl ketone, 4,4'-dihydroxydiphenylmethane, 1,1-bis(4-hydroxyphenyl)-1-phenylethane, 1,1-bis(4-hydroxyphenyl)cyclohexane, and 3,3,5-trimethyl-1,1-bis(4-hydroxyphenyl)cyclohexane (bisphenol TMC). These divalent phenol components may be used individually or in combination of two or more.

[0020] The divalent phenol component preferably contains at least one of bisphenol A or bisphenol TMC (particularly bisphenol A) from the viewpoint of further improving flame retardancy, transparency and mechanical properties, obtaining a resin composition with excellent moldability, obtaining a resin molded article with excellent mechanical properties and chemical resistance, and reducing the molding shrinkage rate of the resin molded article. When the divalent phenol component contains at least one of bisphenol A or bisphenol TMC, the total content of bisphenol A and bisphenol TMC is preferably 50 mol% or more (particularly 50 to 100 mol%), more preferably 70 mol% or more (particularly 70 to 100 mol%), even more preferably 90 mol% or more (particularly 90 to 100 mol%), sufficiently preferably 95 mol% or more (particularly 95 to 100 mol%), even more preferably 98 mol% or more (particularly 98 to 100 mol%), and particularly preferably 100 mol%, relative to the total amount of the divalent phenol component. The total content of bisphenol A and bisphenol TMC may also refer to the total content of bisphenol A and bisphenol TMC residues. Note that if the divalent phenol component contains only bisphenol A, the total content of bisphenol A and bisphenol TMC refers to the content of bisphenol A.

[0021] The polyarylate resin (A) may contain other dihydric alcohol components (hereinafter sometimes referred to as "other dihydric alcohol components") as constituent components. The content of other dihydric alcohol components in the polyarylate resin (A) is not particularly limited, and for example, it may be 50% by mass or less relative to the total amount of dihydric phenol components, and from the viewpoint of further improvement of flame retardancy, transparency and mechanical properties and further improvement of color tone and discoloration resistance, it is preferably 20% by mass or less, more preferably 10% by mass or less, even more preferably 5% by mass or less, particularly preferably 1% by mass or less, and very preferably 0% by mass. The content of other dihydric alcohol components may also be the content of residues of other dihydric alcohol components.

[0022] The polyarylate resin (A) may further contain trifunctional or higher polyvalent monomer components, to the extent that it does not impair the properties and effects of the present invention. When the polyarylate resin contains trifunctional or higher polyvalent monomer components, a branched structure is introduced into the polyarylate resin. Examples of trifunctional or higher polyvalent monomer components include tricarboxylic acid components such as 1,3,5-benzenecarboxylic acid and triol components such as 4,4',4''-trihydroxytriphenylmethane. The content of polyvalent monomer components in the polyarylate resin (A) is usually 20 mol% or less relative to the total amount of aromatic dicarboxylic acid components and divalent phenol components, and from the viewpoint of further improvement of flame retardancy, transparency and mechanical properties, it is preferably 10 mol% or less, more preferably 5 mol% or less, even more preferably 2 mol% or less, very preferably 1 mol% or less, and most preferably 0 mol%.

[0023] The polyarylate resin (A) may contain an end encapsulant and may have its molecular weight adjusted. Examples of end encapsulants include one or more compounds selected from the group consisting of monohydric phenols such as phenol, cresol, p-tert-butylphenol, 2,3,5-trimethylphenol, 2,3,6-trimethylphenol, and cumylphenol; monohydric acid chlorides such as benzoic acid chloride, methanesulfonyl chloride, and phenylchloroformate; monohydric alcohols such as methanol, ethanol, n-propanol, isopropanol, n-butanol, 2-butanol, pentanol, hexanol, dodecyl alcohol, stearyl alcohol, benzyl alcohol, and phenethyl alcohol; and monohydric carboxylic acids such as acetic acid, propionic acid, octanoic acid, cyclohexanecarboxylic acid, benzoic acid, toluic acid, phenylacetic acid, p-tert-butylbenzoic acid, and p-methoxyphenylacetic acid. From the viewpoint of further improving flame retardancy, transparency, and mechanical properties, as well as further improving color tone and discoloration resistance, monohydric phenols (especially p-tert-butylphenol) or monohydric carboxylic acids (especially monohydric carboxylic acids) are preferred as end-cap encapsulants.

[0024] The content of the end encapsulant in the polyarylate resin (A) is not particularly limited, but from the viewpoint of further improving flame retardancy, transparency and mechanical properties, and further improving color tone and discoloration resistance, it is preferably 0.1 to 10 parts by mass, more preferably 0.5 to 8 parts by mass, even more preferably 1 to 6 parts by mass, and particularly preferably 3 to 6 parts by mass, per 100 parts by mass of the total amount of aromatic dicarboxylic acid component and divalent phenol component. The content of the end encapsulant may also be the content of residues of the end encapsulant.

[0025] The inherent viscosity of the polyarylate resin (A) is not particularly limited, but from the viewpoint of obtaining a resin molded article with good mechanical properties and further improving transparency and mechanical properties, it is preferably 0.45 or higher, more preferably 0.45 to 0.80, even more preferably 0.60 to 0.80, and very preferably 0.70 to 0.75. In the present invention, the inherent viscosity of the polyarylate resin (A) is the value obtained by measuring the falling velocity of a 1 g / dL sample solution obtained by dissolving the polyarylate resin (A) in a mixed solvent of phenol / 1,1,2,2-tetrachloroethane / anhydrous sodium acetate = 60 / 40 / 0.006 (mass ratio), and the falling velocity of the mixed solvent, using an Ubbelohde viscometer at a temperature of 25°C, and is calculated from the following formula. Inherent viscosity = ln[(fall time of sample solution / fall time of mixed solvent) / resin concentration of sample solution (g / dL)]

[0026] The carboxyl value of the polyarylate resin (A) is not particularly limited, but from the viewpoint of suppressing a decrease in the mechanical properties of the molded resin article, it is preferably 10 equivalents / ton or less. The carboxyl value of the polyarylate resin originates from the terminal carboxylic acid and the carboxylic acid anhydride bond produced by side reactions. In the present invention, the carboxyl value of the amorphous polyarylate resin is the value obtained by the following measurement method. 0.30 g of amorphous polyarylate resin is dissolved in 20 mL of methylene chloride, and phenol red is added as an indicator to obtain a sample solution. While stirring the obtained sample solution, a 0.1 N KOH (ethanol-benzyl alcohol) solution is added dropwise to the sample solution and the carboxyl value is determined by neutralization titration.

[0027] The method for producing the polyarylate resin (A) is not particularly limited, and it can be produced by known polymerization methods such as solution polymerization, melt polymerization, and interfacial polymerization. Among these, solution polymerization and interfacial polymerization are preferred because they facilitate the production of high molecular weight resins and avoid discoloration due to heat.

[0028] One example of a solution polymerization method is to dissolve a divalent phenol and an aromatic dicarboxylic acid dihalide in an organic solvent, stir, and react them at 2 to 80°C. As a melt polymerization method, for example, one method involves reacting a divalent phenol with an organic carboxylic acid anhydride such as acetic anhydride at 100-200°C to obtain a diesterified product of the divalent phenol, and then raising the temperature to 300-360°C under reduced pressure while stirring with an aromatic dicarboxylic acid to carry out a transesterification reaction, while simultaneously distilling off the by-product organic carboxylic acid. One interfacial polymerization method involves mixing an alkaline aqueous solution containing a divalent phenol with an organic solvent solution of an aromatic dicarboxylic acid dihalide in the presence of a polymerization catalyst, and stirring the mixture at 2 to 80°C.

[0029] [Polycarbonate resin] The polycarbonate resin (B) used in the present invention is not particularly limited, and may be, for example, a known polycarbonate resin consisting of bisphenol residue units and carbonate residue units.

[0030] The melt flow rate (MFR) of the polycarbonate resin (B) is not particularly limited and may be, for example, 50 g / 10 min or less (particularly 1 to 50 g / 10 min). From the viewpoint of further improving flame retardancy, transparency, and mechanical properties, it is preferably 1 to 32 g / 10 min, more preferably 1 to 25 g / 10 min, even more preferably 1 to 20 g / 10 min, and very preferably 1 to 15 g / 10 min.

[0031] In this specification, MFR values ​​are those measured by the following method. The values ​​used are those measured under conditions of 300°C and 1.2 kg load, in accordance with ISO 1133.

[0032] Polycarbonate resin (B) can be obtained commercially or manufactured by known methods.

[0033] Examples of commercially available polycarbonate resins (B) include SD POLYCA301-4, 301-15, 301-30, 200-3, 200-13, and 200-30 from Sumika Polycarbonate Co., Ltd., Panlite L-1225 and L-1250 from Teijin Corporation, Makrón 2600, Makrón 3200, APEC1695, APEC1795, APEC1800, APEC1895, and APEC2095 from Covestro Corporation, XHT2141, XHT3141, XHT4141, and XHT5141 from Sabic Corporation, and TAFLONNEORC1760 and TAFLONNEOAG1950 from Idemitsu Kosan Co., Ltd. Polycarbonate resin (B) can be used alone or in combination of two or more types.

[0034] Examples of known methods for producing polycarbonate resin (B) include interfacial polymerization and melt polymerization.

[0035] The resin composition of the present invention may or may not contain polycarbonate resin (B). The mass ratio (A / B) of polyarylate resin (A) to polycarbonate resin (B) in the resin composition of the present invention is 100 / 0 to 25 / 75, and from the viewpoint of further improvement of flame retardancy, transparency and mechanical properties, it is preferably 100 / 0 to 28 / 72 (particularly 100 / 0 to 30 / 70), more preferably 100 / 0 to 40 / 60, even more preferably 100 / 0 to 60 / 40, sufficiently preferably 100 / 0 to 80 / 20, even more preferably 100 / 0 to 95 / 5, and most preferably 100 / 0. If the ratio of polyarylate resin (A) to the total amount of polyarylate resin (A) and polyester resin (B) is too low, the flame retardancy will decrease.

[0036] The ratio of the total amount of polyarylate resin (A) to polycarbonate resin (B) in the total amount of the resin composition of the present invention is not particularly limited, and is usually 50% by mass or more, preferably 70% by mass or more, more preferably 90% by mass or more, even more preferably 95% by mass or more, and very preferably 98% by mass or more, from the viewpoint of further improvement of flame retardancy, transparency and mechanical properties.

[0037] [Organometallic salts] The resin composition of the present invention contains an organometallic salt (C) that does not contain halogen elements. An organometallic salt (C) that does not contain halogen elements in its molecule (or molecular structure) is an organometallic salt (C) that does not contain halogen elements. As such an organometallic salt (C), a metal salt of an aromatic sulfonic acid ester is preferred. A metal salt of an aromatic sulfonic acid ester is an organic compound having one or more (particularly 1 to 3) aromatic rings and one or more (particularly 1) sulfonic acid groups in one molecule. A metal salt of an aromatic sulfonic acid ester usually has sulfonic acid groups in the form of a metal salt, and may further have one or more (particularly 1 to 2) sulfonyl groups in addition to the sulfonyl groups of the sulfonic acid groups. If the resin composition does not contain an organometallic salt (C), the flame retardancy will decrease. In this case, if other compounds, such as phosphorus compounds and / or flame retardants (particularly halogenated flame retardants, silicon-based flame retardants) are included instead of the organometallic salt (C), sufficient mechanical properties cannot be obtained.

[0038] Examples of metal salts of aromatic sulfonic acid esters include metal salts of diphenylsulfonic acid esters represented by the following general formula (1). In particular, compounds in general formula (1) where n is 1 can be called "metal salts of diphenylsulfonic acid esters."

[0039] [ka]

[0040] In general formula (1), n ​​is an integer greater than or equal to 0 (particularly between 0 and 10). From the viewpoint of further improvement of flame retardancy, transparency and mechanical properties, n is preferably an integer between 0 and 3, more preferably an integer between 0 and 2, even more preferably 0 or 1, and very preferably 1. m1 is an integer between 0 and 5. From the viewpoint of further improving flame retardancy, transparency, and mechanical properties, m1 is preferably an integer between 0 and 3, more preferably an integer between 0 and 2, even more preferably 0 or 1, and very preferably 0. m2 is an integer between 0 and 4. From the viewpoint of further improving flame retardancy, transparency, and mechanical properties, m2 is preferably an integer between 0 and 3, more preferably an integer between 0 and 2, even more preferably 0 or 1, and very preferably 0. R1 and R2 are each independently selected from the group consisting of alkyl groups or vinyl groups having 1 to 6 carbon atoms. C1 to 6 alkyl groups include, for example, methyl, ethyl, propyl, butyl, pentyl, and hexyl groups, and are preferably selected from the group consisting of alkyl groups having 1 to 3 carbon atoms from the viewpoint of further improving flame retardancy, transparency, and mechanical properties. R1 and R2 are each independently selected from the group consisting of alkyl groups having 1 to 6 carbon atoms (particularly 1 to 3 carbon atoms) from the viewpoint of further improving flame retardancy, transparency, and mechanical properties. When m1 is an integer of 2 or more, 2 or more R1s may each be independently selected from the group for R1 and R2 described above. When m2 is an integer of 2 or more, or when m2 is 1 and n is an integer of 2 or more, 2 or more R2s may each be independently selected from the group for R1 and R2 described above. M represents a metal. M is one or more metals selected from the group consisting of alkali metals, preferably alkali metals such as Li (lithium), Na (sodium), K (potassium), Rb (rubidium), Se (selenium), and Fr (francium), even more preferably Li, Na, and K, and certainly preferably Na and K, with K being the most preferred.

[0041] For example, when n is 0, m1 may be an integer for m1 as described above, and is preferably 1 from the viewpoint of further improvement of flame retardancy, transparency and mechanical properties. When m1 is 1, the substitution position of R1 may be ortho, meta, or para, relative to the sulfonyl group directly bonded to the benzene ring to which R1 is bonded, and is preferably para from the viewpoint of further improvement of flame retardancy, transparency and mechanical properties. When n is 0 and m1 is 1, R1 is independently selected from the group for R1 described above, and is preferably selected from the group consisting of C1-C3 alkyl groups or vinyl groups, and more preferably from the group consisting of C1-C3 alkyl groups, from the viewpoint of further improvement of flame retardancy, transparency and mechanical properties. In this case, M may be a metal for M described above, and is preferably one or more metals selected from the group consisting of Li, Na, and K, more preferably from the group consisting of Na and K, and even more preferably Na.

[0042] For example, when n is 1, R1 and R2 are each independently selected from the group for R1 and R2 described above, and are preferably selected from the group consisting of alkyl groups having 1 to 6 carbon atoms (particularly 1 to 3 carbon atoms) from the viewpoint of further improving flame retardancy, transparency, and mechanical properties. In this case, m1 and m2 may be integers for m1 and m2 described above, and are each independently preferably 0 or 1, more preferably both 0, from the viewpoint of further improving flame retardancy, transparency, and mechanical properties. In this case, M may be a metal described above, and is preferably one or more metals selected from the group consisting of Li, Na, and K, more preferably Na and K, and even more preferably K, from the viewpoint of further improving flame retardancy, transparency, and mechanical properties.

[0043] If the organometallic salt (C) used in this invention contains a halogen element, it contains environmental pollutants and therefore has an impact on the environment. Not limited to this case, if the resin composition contains a compound containing a halogen element, it also contains environmental pollutants and therefore has an impact on the environment.

[0044] The blending ratio (or content) of the organometallic salt (C) in the resin composition of the present invention is 0.05 to 3.2 parts by mass per 100 parts by mass of the total amount of polyarylate resin (A) and polycarbonate resin (B). From the viewpoint of further improving flame retardancy, transparency, and mechanical properties, it is preferably 0.05 to 2.5 parts by mass, more preferably 0.08 to 2.2 parts by mass, even more preferably 0.25 to 1.8 parts by mass, sufficiently preferably 0.28 to 1.7 parts by mass, and most preferably 1.0 to 1.7 parts by mass. If the blending ratio (or content) of organometallic salt (C) is too low, the flame retardancy will not be sufficiently exhibited. Also, if the blending ratio (or content) of organometallic salt (C) is too high, not only will the transparency be impaired, but decomposition will occur during molding, impairing the mechanical properties.

[0045] [Other ingredients] The resin composition of the present invention may contain other resins (particularly thermoplastic resins) besides the polyarylate resin (A) and polycarbonate resin (B), but it is preferable that it does not contain other resins. The other resins are not particularly limited as long as they do not contain silicon elements in their molecules, and examples include polyester resins, polyphenylene ether resins, polystyrene resins, acrylonitrile butadiene styrene resins, and polyamide resins. Note that the polyester resin refers to a polyester resin other than the polyarylate resin (A).

[0046] The content of other resins (especially thermoplastic resins) in the resin composition of the present invention is not particularly limited. For example, it may be 100% by mass or less, particularly 50% by mass or less, relative to the total amount of polyarylate resin (A) and polycarbonate resin (B). From the viewpoint of further improving flame retardancy, transparency and mechanical properties, as well as further improving color tone and flame retardancy, it is preferably 10% by mass or less, more preferably 5% by mass or less, and even more preferably 1% by mass or less. The lower limit of the content of other resins (especially thermoplastic resins) is not particularly limited, and the content of other resins (especially thermoplastic resins) may be 0% by mass.

[0047] The resin composition of the present invention may contain additives. The additives are not particularly limited as long as they do not contain silicon elements in their molecules, and additives that have conventionally been added to polyarylate resins (A) and polycarbonate resins (B) can be used. Examples include antioxidants, lubricants, dyes and pigments, flow improvers, weathering agents, and fillers.

[0048] Examples of antioxidants include various types of antioxidants such as hindered phenol compounds, hindered amine compounds, thioether compounds, and phosphorus compounds.

[0049] Examples of lubricants include fatty acid salts, such as stearate.

[0050] Examples of dyes and pigments include metal complex dyes; anthraquinone dyes; perinone dyes; inorganic pigments such as carbon black and inorganic metal pigments; and organic pigments composed of organic compounds, such as azo pigments and polycyclic pigments.

[0051] Examples of fluidity improvers include organometallic salts such as fatty acid salts, fluorine compounds, and organic compounds including amide compounds.

[0052] Examples of weather-resistant agents include various weather-resistant compounds such as benzoxazinon compounds, benzotriazole compounds, triazine compounds, and cyanoacrylate compounds.

[0053] Examples of fillers include glass fibers, glass beads, mica, talc, and spherical silica. Among these, glass fibers are preferred from the viewpoint of further improving mechanical properties, and spherical silica is preferred from the viewpoint of further improving dimensional stability and impact resistance.

[0054] The content of additives in the resin composition of the present invention is not particularly limited. For example, it may be 50 parts by mass or less, particularly 30 parts by mass or less, per 100 parts by mass of the total amount of polyarylate resin (A) and polycarbonate resin (B). From the viewpoint of further improving flame retardancy, transparency and mechanical properties, and further improving color tone and discoloration resistance, it is preferably 10 parts by mass or less, more preferably 5 parts by mass or less, even more preferably 1 part by mass or less, particularly preferably 0.8 parts by mass or less, sufficiently preferably 0.4 parts by mass or less, and more sufficiently preferably 0.1 parts by mass. If two or more additives are included, their total content should be within the above range. The lower limit of the additive content is not particularly limited, and the additive content may be 0 parts by mass.

[0055] The resin composition of the present invention does not contain silicon-based compounds. This means that the resin composition of the present invention is substantially free of silicon-based compounds. Specifically, the content of silicon elements in the resin composition of the present invention, based on ICP-AES measurement, is below the detection limit, or, if detected, is 2000 ppm or less relative to the total weight of the resin composition, preferably 1000 ppm or less, more preferably 500 ppm or less, and most preferably 100 ppm or less. Even without containing silicon-based compounds (especially silicone-based flame retardants), the resin composition of the present invention can achieve sufficiently excellent flame retardancy, as well as sufficiently excellent permeability and mechanical properties. When a resin composition contains silicon-based compounds, flame retardancy may decrease. In this case, even if flame retardancy does not decrease, permeability and mechanical properties may decrease.

[0056] Silicone compounds are organic compounds that contain silicon atoms in their molecules, and include, for example, silicone compounds that have been conventionally used as flame retardants. Examples of such silicone compounds include KR-2710, KR-480, KR-481, FRX-120, KR-511 from Shin-Etsu Silicone Co., Ltd., SFR100, SFR320 from Momentive Corporation, SI-30-10 from Osaka Gas Chemical Co., Ltd., and DOWSIL4-7081, DOWSIL11-100, and DOWSILFCA-107 from Dow-Toray Corporation.

[0057] From the viewpoint of environmental considerations and reduction of environmental impact, the resin composition of the present invention preferably does not contain halogen compounds. The statement that the resin composition of the present invention does not contain halogen compounds means that the resin composition of the present invention substantially does not contain halogen compounds. Specifically, the halogen element content of the resin composition of the present invention, based on ICP-AES measurement, is below the detection limit, or, if detected, is 2000 ppm or less, particularly 1000 ppm or less, preferably 500 ppm or less, and more preferably 100 ppm or less, relative to the total weight of the resin composition. Even without containing halogen compounds (especially halogen-based flame retardants), the resin composition of the present invention can achieve sufficiently excellent flame retardancy, as well as sufficiently excellent permeability and mechanical properties.

[0058] Halogen compounds are organic compounds that contain halogen atoms in their molecules, and include, for example, halogen compounds that have been conventionally used as flame retardants. Examples of such halogen compounds include Teijin's FG-7000, FG-7500, FG-8500, and Tosoh's Flamecut 120G and Flamecut 210HR.

[0059] [Method for producing resin compositions] The method for producing the resin composition of the present invention is preferably a melt-kneading method using a twin-screw kneader. The kneading temperature is not particularly limited and can be appropriately adjusted according to the blending ratio of polyarylate resin (A) and polycarbonate resin (B). For example, when the blending ratio of polyarylate resin / polycarbonate resin is greater than 95 / 5 and 100 / 0 or less (especially 100 / 0), the kneading temperature is preferably 340 to 360°C, particularly 350°C. Also, for example, when the blending ratio of polyarylate resin / polycarbonate resin is 25 / 75 or more and 95 / 5 or less (especially 30 / 70 to 90 / 10), the kneading temperature is preferably 270 to 330°C (especially 320°C). If the kneading temperature is too low, the load on the kneader will increase, which may cause problems such as venting. If the kneading temperature is too high, decomposition of the resin may occur. The method for collecting the obtained resin composition is not particularly limited, but considering subsequent molding, it is preferable to melt-mix the composition in a twin-screw kneader, then draw it out in strand form, cool and solidify it, and then pelletize it to obtain resin composition pellets. Therefore, the resin composition of the present invention usually has the form of pellets.

[0060] [Resin molded product] The resin composition of the present invention is preferably used as a raw material for a resin molded article. The resin molded article of the present invention contains the resin composition of the present invention, and more specifically, can be manufactured using the resin composition by a conventional molding method. Examples of molding methods include injection molding, extrusion molding, blow molding, and sintering molding, and among these, injection molding is preferred because it can sufficiently improve mechanical properties and moldability. The injection molding machine is not particularly limited, but examples include a screw in-line injection molding machine or a plunger injection molding machine. The resin composition, heated and melted in the cylinder of the injection molding machine, is measured for each shot, injected into the mold in a molten state, cooled and solidified in a predetermined shape, and then removed from the mold as a molded article.

[0061] When molding the resin composition of the present invention, it is preferable to use a resin composition (especially its pellets) that is thoroughly dried. If the moisture content is high, the resin will foam in the cylinder of the injection molding machine, making it difficult to obtain an optimal resin molded product. In addition, the polyarylate resin and polycarbonate resin may undergo hydrolysis, resulting in a decrease in molecular weight and a deterioration of mechanical properties. The moisture content of the resin composition (especially its pellets) used for injection molding is preferably less than 0.05% by mass, and more preferably less than 0.02% by mass, of 100% by mass of the resin composition. The mold temperature during injection molding must be kept below the glass transition temperature (Tg) of the polyarylate resin, preferably below (Tg-30°C), and more preferably below (Tg-50°C). If the mold temperature exceeds the Tg of the polyarylate resin, the resin molded product may deform when released from the mold because the resin composition has not sufficiently solidified. The mold temperature refers to the actual temperature of the mold surface, and this temperature is adjusted using a mold temperature controller so that it falls within the above temperature range. If necessary, a coolant may be circulated inside the mold.

[0062] When the resin composition of the present invention is formed into plate-shaped molded articles with thicknesses of 1.6 mm and 3.2 mm, the evaluation result based on the UL94 test is V-0, V-1, or V-2 for plate-shaped molded articles of any thickness, preferably V-0 or V-1, and more preferably V-0.

[0063] The resin composition of the present invention, when formed into a 3 mm thick plate-shaped molded body, has a total light transmittance of 75% or more, preferably 80% or more, and more preferably 85% or more, based on a haze meter NDH-2000 manufactured by Nippon Denshoku Industries Co., Ltd. The upper limit of this total light transmittance is not particularly limited, and the transmittance may be 100% or less (particularly 95% or less).

[0064] The resin composition of the present invention, when formed into a plate-shaped molded article with a thickness of 4 mm, exhibits a Charpy impact strength of 10 kJ / m² according to ISO 179-1eA. 2 The above is preferable, and preferably 20 kJ / m³ 2 The above is more preferable: 30 kJ / m 2That concludes the explanation. There is no particular upper limit to the Charpy impact strength, and the impact strength is 80 kJ / m 2 The following (especially 70kJ / m³) 2 The following may also be acceptable. [Examples]

[0065] The present invention will be described in detail below with reference to examples, but the present invention is not limited thereto. Furthermore, physical properties and other measurements were performed by the following methods.

[0066] 1.Measurement method (1) Flammability The resin composition pellets obtained in each of the examples and comparative examples were subjected to injection molding under the following conditions to produce molded articles of predetermined dimensions. Molding conditions: Examples 1-16 and Comparative Examples 1-3, 5, 6, and 9 were molded at 350°C. All others were molded at 310°C. Using strip-shaped specimens with thicknesses of 1.6 mm and 3.2 mm, length of 125 mm, and width of 12 mm, the afterflame time and drip properties were evaluated for five specimens (a total of 10 flame applications) after applying a burner flame to each vertically held specimen twice for 10 seconds, in accordance with the UL94 test defined by Underwriters Laboratories. The specimens were then classified into the classes shown in Table 1. [Evaluation Criteria] ◎:V-0 (excellent); ○: V-1 (Good); △: V-2 (Pass (No practical problems)); ×: V-2 or lower (Failure (Practical problems)). "V-2 or lower" means "not self-extinguishing."

[0067] [Table 1]

[0068] (2) Transparency The resin composition pellets obtained in each of the examples and comparative examples were subjected to injection molding under the following conditions to produce molded articles of predetermined dimensions. Molding conditions: 350 °C for Examples 1 to 16, Comparative Examples 1 to 3, 5, 6, and 9; 310 °C for others. For the plate-shaped molded product with a thickness of 3 mm, the total light transmittance was measured using a haze meter NDH-2000 manufactured by Nippon Denshoku Industries Co., Ltd. [Evaluation criteria] ◎: 85% or more (excellent); ○: 80% or more and less than 85% (good); △: 75% or more and less than 80% (qualified (no practical problem)); ×: Less than 75% (unqualified (practical problem exists)).

[0069] (3) Mechanical properties (Charpy impact strength) The resin composition pellets obtained in each of the examples and comparative examples were subjected to injection molding under the following conditions to produce molded products of predetermined dimensions. Measured using a notched specimen with a thickness of 4 mm based on ISO 179-1eA. [Evaluation criteria] ◎: > 30 kJ / m 2 (excellent); ○: 20 kJ / m 2 or more and < 30 kJ / m 2 (good); △: 10 kJ / m 2 [[ID=3—6]] or more and < 20 kJ / m 2 (qualified (no practical problem)); ×: < 10 kJ / m 2 (unqualified (practical problem exists)).

[0070] (4) Comprehensive evaluation Among all the evaluation results of flame retardancy, permeability, and mechanical properties, the lowest evaluation result was used as the result of the comprehensive evaluation. ◎: All of the above evaluation results were ◎ (excellent); ○: The lowest evaluation result among all of the above evaluation results was ○ (good); △: The lowest evaluation result among all of the above evaluation results was △ (qualified (no practical problem)); ×: The lowest evaluation result among all of the above evaluation results was × (unqualified (practical problem exists)).

[0071] 2.Raw materials The raw materials used in the examples and comparative examples are shown below. (1) Polyarylate resin Polyarylate resins (A-1) to (A-2) synthesized by the following method were used.

[0072] Manufacturing Example 1 In a reaction vessel equipped with a stirring device, 100 parts by mass of 2,2-bis(4-hydroxyphenyl)propane (bisphenol A), 3.8 parts by mass of p-tert-butylphenol, 37 parts by mass of sodium hydroxide, 0.6 parts by mass of trimethylbenzylammonium chloride, and sodium hydrosulfite were charged at a ratio of 0.5% by mass relative to the mass of the divalent phenol component, and dissolved in 1103 parts by mass of water to form an aqueous layer. Separately, 92 parts by mass of a terephthalic acid chloride / isophthalic acid chloride = 1 / 1 mixture was dissolved in 895 parts by mass of dichloromethane to form an organic layer. This organic layer was added to the previously prepared aqueous layer under strong stirring, and polymerization was carried out at 15°C for 2 hours. After this, the aqueous layer and the organic layer were separated, and 10 parts by mass of acetic acid was added to the organic layer to stop the reaction. Further washing with water was repeated until neutral, and a 17% by mass solution of polyarylate in dichloromethane was obtained. A polyarylate solution in dichloromethane was granulated by hot water granulation, and the water and dichloromethane were thoroughly dried using a paddle-type hot air dryer at 120-135°C to obtain polyarylate resin (A-1). The inherent viscosity of this polyarylate resin was 0.72 dL / g.

[0073] Manufacturing Example 2 Polyarylate resin (A-2) was obtained in the same manner as in Production Example 1, except that bisphenol A was changed to bisphenol TMC. The inherent viscosity of the polyarylate resin was 0.63 dL / g.

[0074] (2) Polycarbonate (B-1)200-3 (manufactured by Sumika Polycarbonate Co., Ltd., SDPOLYCA): MFR 3g / 10min (B-2) 200-13 (manufactured by Sumika Polycarbonate Co., Ltd., SDPOLYCA): MFR 13g / 10min (B-3) 200-30 (manufactured by Sumika Polycarbonate Co., Ltd., SDPOLYCA): MFR 30g / 10min (B-4)2205 (Covestro, Makrón): MFR 34g / 10min

[0075] (3) Organometallic salts (C-1) Diphenyl sulfonate ester (Arichem, KSS-FR) In the general formula (1) above, n is 1; m1 and m2 are 0; and M represents potassium.

[0076] (C-2) Sodium parastyrene sulfonate (manufactured by Tosoh Finechem Co., Ltd., SPINOMAR NaSS) In the general formula (1) above, n is 0; m1 is 1; R1 is a vinyl group; and M represents sodium.

[0077] (C-3) Sodium p-toluenesulfonate (manufactured by Tokyo Chemical Industry Co., Ltd.) In the general formula (1) above, n is 0; m1 is 1; R1 is a methyl group; and M represents sodium.

[0078] (4) Phosphorus compounds (D-1) PEP-36 (Manufactured by ADEKA, ADEKA stub, 3,9-bis(2,6-di-tert-butyl-4-methylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane) (D-2) HP-10 (ADEKA Corporation, ADEKA stub, 2,2'-methylenebis(4,6-di-tert-butylphenyl) 2-ethylhexyl phosphite)

[0079] (5) Phenolic compounds (E-1)RIANOX1010 (manufactured by RIANLON, 2,2-bis[[[3-(3,5-ditert-butyl-4-hydroxyphenyl)propionyl]oxy]methyl]propane-1,3-diol 1,3-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propionate])

[0080] (6) Flame retardants (F-1) FG-8500 (manufactured by Teijin Corporation, Fire Guard, bromine-based flame retardant, bromine content 58%) (F-2) KR-2710 (manufactured by Shin-Etsu Silicone Co., Ltd., silicone-based flame retardant)

[0081] Example 1 100 parts by mass of polyarylate resin (A-1), 0.1 parts by mass of organometallic salt (C-1), and 0.05 parts by mass of phosphorus compound (D-1) were weighed using a loss-in-weight type continuous quantitative feeding device (Kubota Corporation, CE-W-1 model) and supplied to the main feed port of a co-direction twin-screw extruder (Toshiba Machine Co., Ltd., TEM37BS model) with a screw diameter of 37 mm and an L / D ratio of 40, for melt-mixing. After the mixed material was taken from the die in strand form, it was cooled and solidified in a water bath, and then cut with a pelletizer to obtain resin composition pellets. The barrel temperature of the extruder was set to 300°C to 350°C, the screw rotation speed to 250 rpm, and the discharge rate to 20 kg / hour.

[0082] Examples 2-22 and Comparative Examples 1-9 Resin composition pellets were obtained in the same manner as in Example 1, except that the types and content ratios of polyarylate resin, polycarbonate resin, organometallic salt, phosphorus compound, phenol compound, and flame retardant, as well as the barrel temperature, were changed as shown in Table 2 or Table 3.

[0083] Tables 2 and 3 show the composition and properties of the obtained resin composition, as well as the physical properties of the resin molded article.

[0084] [Table 2]

[0085] [Table 3]

[0086] In Tables 2 and 3, for barrel temperature, "350" means "300-350°C" and "310" means "260-310°C".

[0087] As shown in Table 2, the resin compositions of Examples 1 to 22 exhibited flame retardancy of V-0, V-1, or V-2 at thicknesses of 1.6 mm and 3.2 mm. Furthermore, the resulting resin molded articles exhibited excellent light transmittance and Charpy impact strength.

[0088] On the other hand, as shown in Table 3, the resin compositions containing only polyarylate resin (Comparative Examples 1 and 2) were inferior in flame retardancy because they did not contain organometallic salts. The resin composition containing polyarylate resin and 3.5 parts by mass of organometallic salt (Comparative Example 3) was excellent in flame retardancy and Charpy impact strength, but was poor in permeability. The resin composition with a blending ratio of polyarylate resin and polycarbonate resin of less than 30 / 70 and containing organometallic salt (Comparative Example 4) was excellent in permeability and Charpy impact strength, but was inferior in flame retardancy. The resin composition containing polyarylate resin, polycarbonate resin, and a brominated flame retardant (Comparative Example 5) was excellent in flame retardancy and permeability, but was poor in Charpy impact strength. The resin composition containing polyarylate resin, organometallic salt, and a silicon-based flame retardant (Comparative Example 6) was inferior in flame retardancy, permeability, and Charpy impact strength due to the decomposition of the silicon-based flame retardant. Resin compositions containing polyarylate resin, polycarbonate resin, organometallic salt, and silicon-based flame retardant (Comparative Examples 7 and 8) exhibited inferior flame retardancy, transmittance, and Charpy impact strength due to the decomposition of the silicon-based flame retardant. Resin composition containing polyarylate resin, polycarbonate resin, organometallic salt, and silicon-based flame retardant (Comparative Example 10) also exhibited inferior transmittance and Charpy impact strength due to the decomposition of the silicon-based flame retardant. [Industrial applicability]

[0089] The resin composition of the present invention is useful as a container material for lighting equipment, pharmaceuticals, etc.; electrical and electronic components such as connectors, sockets, relays, and switches; automotive parts such as components around automobile engines; housings for washing machines, microwave ovens, televisions, lighting equipment, displays, etc.; and industrial equipment parts such as motors and generators.

Claims

1. The mass ratio of polyarylate resin (A) to polycarbonate resin (B) is 100 / 0 to 25 / 75. The total amount of the polyarylate resin (A) and the polycarbonate resin (B) is 100 parts by mass, and the mixture contains 0.05 to 3.2 parts by mass of an organometallic salt (C) that does not contain halogen elements. A resin composition that does not contain silicon-based compounds.

2. The resin composition according to claim 1, wherein the organometallic salt (C) is a metal salt of an aromatic sulfonic acid ester.

3. The resin composition according to claim 1, wherein the organometallic salt (C) is a metal salt of an aromatic sulfonic acid ester represented by general formula (1). 【Chemistry 1】 (In the formula, n is an integer greater than or equal to 0; m1 is an integer between 0 and 5 (inclusive); m2 is an integer between 0 and 4 (inclusive); R １ and R ２ Each of these is independently selected from the group consisting of alkyl groups or vinyl groups having 1 to 6 carbon atoms; M represents a metal.

4. The resin composition according to claim 3, wherein the organometallic salt (C) is a metal salt of a diphenylsulfonic acid ester in which n is 1 in the general formula (1).

5. The resin composition according to claim 1, wherein the metal of the organometallic salt (C) is an alkali metal.

6. The resin composition according to claim 1, wherein the MFR of the polycarbonate resin (B) is 50 g / 10 min or less.

7. The resin composition according to claim 1, wherein the metal of the organometallic salt (C) is one or more metals selected from the group consisting of Li, Na, and K.

8. The content of the organometallic salt (C) is 0.05 to 2.5 parts by mass per 100 parts by mass of the total amount of the polyarylate resin (A) and the polycarbonate resin (B). The above n is 0 or 1, The aforementioned R １ and R ２ Each of these is independently selected from the group consisting of alkyl groups having 1 to 6 carbon atoms. The aforementioned m1 and m2 are each independent integers between 0 and 2. The aforementioned M is one or more metals selected from Li, Na, and K. The resin composition according to claim 3, wherein the MFR of the polycarbonate resin (B) is 1 to 32 g / 10 min.

9. The content of the organometallic salt (C) is 0.25 to 1.8 parts by mass per 100 parts by mass of the total amount of the polyarylate resin (A) and the polycarbonate resin (B). The aforementioned n is 1, The aforementioned R １ and R ２ Each of these is independently selected from the group consisting of alkyl groups having 1 to 6 carbon atoms. The aforementioned m1 and m2 are each independent integers between 0 and 2. The aforementioned M is one or more metals selected from Li, Na, and K. The aforementioned polyarylate resin contains bisphenol A as a monomer component, The resin composition according to claim 3, wherein the MFR of the polycarbonate resin (B) is 1 to 25 g / 10 min.

10. A molded article obtained by molding a resin composition according to any one of claims 1 to 9.

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