Flame-retardant aromatic polycarbonate resin composition and molded article of same

Abstract

The present invention provides a flame-retardant aromatic polycarbonate resin composition which contains (A) an aromatic polycarbonate resin, (B) an organohydrogenpolysiloxane that is represented by formula (1), and (C) an organic metal salt that does not contain fluorine, and which contains a specific amount of an aromatic polycarbonate resin that has a specific MVR. Formula (1): [(R1O)(R2)2SiO1 / 2]a[(R3)3SiO1 / 2]b[(H)(R4)SiO2 / 2]c[(Ar)x(R5)2-xSiO2 / 2]d[(R6)2SiO2 / 2]e[(R7)SiO3 / 2]f (In the formula, R1 to R7 each represent an alkyl group or the like; Ar represents an aryl group; x is 1 or 2; 0 < a ≤ 0.03; 0 < b ≤ 0.30; 0 ≤ c ≤ 0.45; 0.20 ≤ d ≤ 0.70; 0 ≤ e ≤ 0.20; 0 ≤ f ≤ 0.70; and (a + b + c + d + e + f) is 1.)

Description

Flame-retardant aromatic polycarbonate resin composition and molded article thereof

[0001] The present invention relates to a flame-retardant aromatic polycarbonate resin composition and a molded article thereof.

[0002] Aromatic polycarbonate resins are formed into various molded articles by simple, highly productive processing methods such as injection molding and are used in a wide range of industrial fields. In particular, aromatic polycarbonate resins are widely used in applications requiring high transparency, such as various lighting covers and protective covers for transmission displays, taking advantage of their excellent transparency, typified by high light transmittance and extremely low haze. In these applications, light sources such as fluorescent lamps and light bulbs reach high temperatures, or when used in bathrooms or outdoors, they are exposed to high humidity. Therefore, it is necessary to maintain transparency, color, and mechanical properties even when exposed to heat and humidity, and therefore, in addition to the transparency of the resin composition, the moisture and heat resistance of the resin composition is important.

[0003] In recent years, flame retardancy in these applications has also been attracting attention, and resin compositions that have high flame retardancy in addition to the above properties are being sought. To impart flame retardancy to aromatic polycarbonate resins, flame-retardant aromatic polycarbonate resin compositions containing halogen-based compounds or phosphorus-based compounds have been proposed. These compositions are used in office automation equipment, home appliances, and other products for which flame retardancy is highly desired. Meanwhile, flame-retardant aromatic polycarbonate resin compositions containing alternative components to these flame retardants have been developed and are beginning to be used in the above-mentioned products. The purpose of this change in flame retardant is to suppress the generation of corrosive gases during molding and to improve the recyclability of products.

[0004] As a new flame retardant that can replace the flame retardants listed above, for example, a silicone compound can be mentioned. In recent years, flame-retardant resin compositions in which a silicone compound is blended with an aromatic polycarbonate resin have been vigorously studied, and various proposals have been made.

[0005] For example, Patent Document 1 proposes a method of blending an alkali (earth) metal salt of perfluoroalkanesulfonic acid and an organosiloxane having an alkoxy group, a vinyl group, and a phenyl group with a polycarbonate resin, and Patent Document 2 proposes a method of blending an alkali metal salt or alkaline earth metal salt of perfluoroalkanesulfonic acid and an organopolysiloxane containing an organoxysilyl group bonded to a silicon atom via a divalent hydrocarbon group with a polycarbonate resin.

[0006] Furthermore, Patent Document 3 proposes a method of blending specific petroleum-based heavy oils or pitches and a silicone compound into a polycarbonate resin component, and Patent Document 4 proposes a method of blending a non-silicone resin having an aromatic ring with a compound of the formula R 0 2SiO 1.0 (R 0 represents a monovalent hydrocarbon group. The same applies hereinafter.) and R 0 SiO 1.5 and a silicone resin having a weight average molecular weight of 10,000 or more and 270,000 or less.

[0007] However, the polycarbonate resin compositions proposed above were not sufficiently transparent or flame retardant, and had problems such as dripping in thin-walled products, failure to achieve V-0 rank under UL Standard 94, clouding of molded products due to insufficient dispersion of the silicone component, and reduced transparency after moist heat treatment due to aggregation of the silicone component.

[0008] On the other hand, Patent Document 5 specifically proposes a resin composition in which an organic alkali metal salt and poly(methylhydrogensiloxane) are added to an aromatic polycarbonate resin. However, this resin composition itself becomes cloudy, and furthermore, poor dispersion such as peeling occurs on the surface of the molded product, and the transparency is not sufficient.

[0009] Furthermore, Patent Documents 6 and 7 propose transparent flame-retardant polycarbonate resin compositions obtained by blending an aromatic polycarbonate resin with a silicone component containing an Si—H group and an aromatic group in the molecule.

[0010] Patent Document 8 proposes a flame-retardant polycarbonate resin composition in which a specific core-shell type graft copolymer having a butadiene rubber core is blended with an aromatic polycarbonate resin, and further contains a fluorinated polyolefin and an organic sulfonic acid metal salt flame retardant, specifically potassium perfluorobutanesulfonate.

[0011] In the above-mentioned prior art documents, polytetrafluoroethylene, which has fibril-forming ability, is often used as an anti-drip agent. However, when polytetrafluoroethylene is blended with aromatic polycarbonate resin, the appearance of the molded product becomes cloudy due to the incompatibility of polytetrafluoroethylene and aromatic polycarbonate resin. In addition, organic sulfonic acid metal salts, specifically potassium perfluorobutanesulfonate, are often used as flame retardants, but they are also incompatible with aromatic polycarbonate resins, resulting in the disadvantage of cloudy appearance.

[0012] Meanwhile, in recent years, fluorine compounds have become subject to international restrictions, primarily in Japan, Europe, and the United States, and there are moves to further strengthen these restrictions. In Europe, perfluorobutanesulfonic acid and its metal salts (PFBS) are restricted by REACH, and restrictions on organic fluorine compounds (PFAS), such as perfluoro- and polyfluoroalkyl compounds typified by polytetrafluoroethylene, are also being implemented, primarily in Europe and the United States.

[0013] JP 6-306265 JP 6-336547 JP 9-169914 JP 10-139964 JP 60-38419 Patent 3779623 Patent 3779624 JP 2019-19191

[0014] Therefore, in order to comply with the above-mentioned PFBS and PFAS regulations, a polycarbonate resin composition that exhibits excellent flame retardancy without relying on perfluorobutanesulfonic acid metal salts or polytetrafluoroethylene is highly desirable. However, it is not easy to achieve flame retardancy (UL-94 V-0) without using perfluorobutanesulfonic acid and its metal salts, which are effective flame retardants, and polytetrafluoroethylene, which is an effective anti-drip agent.

[0015] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a flame-retardant aromatic polycarbonate resin composition which has excellent transparency and excellent drip prevention properties during combustion without using a fluorine compound, and a molded article thereof.

[0016] As a result of extensive research to achieve the above object, the present inventors have found that a resin composition containing a specific aromatic polycarbonate resin, a specific organohydrogenpolysiloxane, and a fluorine-free organic acid metal salt has excellent transparency and anti-dripping properties during combustion, and have completed the present invention.

[0017] That is, the present invention provides: 1. A flame-retardant aromatic polycarbonate resin composition comprising: (A) 100 parts by mass of an aromatic polycarbonate resin; (B) 0.1 to 10 parts by mass of an organohydrogenpolysiloxane represented by the following formula (1) and having a weight-average molecular weight of 700 to 10,000; and (C) 0.001 to 1.0 part by mass of at least one selected from fluorine-free organic alkali metal salts and fluorine-free organic alkaline earth metal salts, wherein the melt volume-flow rate (MVR) measured in accordance with ISO 1133-1 at 300°C under a load of 1.2 kg is 2 to 8 cm3. 3 A flame-retardant aromatic polycarbonate resin composition containing 20 mass % or more of an aromatic polycarbonate resin having a flame retardancy of 10 minutes or less relative to the total mass of the component (A). 1 O) (R 2 ) SiO 1 / 2 ] a [(R 3 ) 3SiO 1 / 2 ] b [(H)(R 4 ) SiO2 / 2 ] c [(Ar) x (R 5 ) 2-x SiO 2 / 2 ] d [(R 6 ) SiO 2 / 2 ] e [(R 7 ) SiO 3 / 2 ] f (1) (wherein, R 1 is a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and R 2 and R 3 are each independently a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or an aryl group having 6 to 12 carbon atoms; R 4 is an alkyl group having 1 to 6 carbon atoms or an aryl group having 6 to 12 carbon atoms, each Ar is independently an aryl group having 6 to 12 carbon atoms, R 5 and R 6 are each independently an alkyl group having 1 to 6 carbon atoms, and R 7 are each independently an alkenyl group having 2 to 8 carbon atoms, an aryl group having 6 to 12 carbon atoms, or an alkyl group having 1 to 8 carbon atoms which may be substituted with an epoxy group, an amino group, an acryloyl group, a methacryloyl group, or a thiol group. x represents 1 or 2, a is a number which satisfies 0<a≦0.03, b is a number which satisfies 0<b≦0.30, c is a number which satisfies 0≦c≦0.45, d is a number which satisfies 0.20≦d≦0.70, e is a number which satisfies 0≦e≦0.20, f is a number which satisfies 0≦f≦0.70, and a+b+c+d+e+f is 1. However, when c is 0, R 2 and R 3wherein one or more of the groups are hydrogen atoms.) 2. The flame-retardant aromatic polycarbonate resin composition according to 1, wherein in formula (1), Ar is a phenyl group, x is 2, and f is 0; 3. The flame-retardant aromatic polycarbonate resin composition according to 1 or 2, wherein component (C) is an alkali metal salt of a fluorine-free aromatic sulfonic acid or an alkaline earth metal salt of a fluorine-free aromatic sulfonic acid; 4. A molded product molded from the flame-retardant aromatic polycarbonate resin composition according to any one of 1 to 3.

[0018] The flame-retardant aromatic polycarbonate resin composition of the present invention exhibits excellent transparency and flame retardancy without using a fluorine compound, and can comply with PFAS regulations.

[0019] The present invention will be described in detail below. [1] Flame-retardant aromatic polycarbonate resin composition The flame-retardant aromatic polycarbonate resin composition of the present invention comprises the following components (A) to (C): (A) an aromatic polycarbonate resin, (B) an organohydrogenpolysiloxane represented by formula (1), and (C) at least one selected from fluorine-free organic alkali metal salts and fluorine-free organic alkaline earth metal salts.

[0020] [Component (A)] The component (A) in the flame-retardant aromatic polycarbonate resin composition of the present invention is an aromatic polycarbonate resin, and examples of the component (A) that can be used include those obtained by reacting a dihydric phenol with a carbonate precursor by an interfacial polycondensation method or a melt transesterification method, as well as those obtained by polymerizing a carbonate prepolymer by a solid-phase transesterification method and those obtained by polymerizing a cyclic carbonate compound by a ring-opening polymerization method.

[0021] Specific examples of the dihydric phenol used herein include hydroquinone, resorcinol, 4,4'-dihydroxydiphenyl, bis(4-hydroxyphenyl)methane, bis{(4-hydroxy-3,5-dimethyl)phenyl}methane, 1,1-bis(4-hydroxyphenyl)ethane, 1,1-bis(4-hydroxyphenyl)-1-phenylethane, 2,2-bis(4-hydroxyphenyl)propane (commonly known as bisphenol A), 2,2-bis{(4-hydroxy-3-methyl)phenyl}propane, 2,2-bis{(4-hydroxyphenyl)propane, 2,2-bis{(3-isopropyl-4-hydroxy)phenyl}propane, 2,2-bis{(4-hydroxy-3-phenyl)phenyl}propane, 2,2-bis(4-hydroxyphenyl)butane, 2,2-bis(4-hydroxyphenyl)-3-methylbutane, 2,2-bis(4-hydroxyphenyl)-3,3-dimethylbutane, 2,4-bis(4-hydroxyphenyl)-2-methylbutane, 2,2-bis(4-hydroxyphenyl)pentane, 2,2-bis(4-hydroxyphenyl)pentane, 1,1-bis(4-hydroxyphenyl)-4-methylpentane, 1,1-bis(4-hydroxyphenyl)cyclohexane, 1,1-bis(4-hydroxyphenyl)-4-isopropylcyclohexane, 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane, 9,9-bis(4-hydroxyphenyl)fluorene, 9,9-bis{(4-hydroxy-3-methyl)phenyl}fluorene, α,α'-bis(4-hydroxyphenyl)-o-diisopropylbenzene, α,α'-bis(4-hydroxyphenyl)-m-diisopropylbenzene, Examples of the hydroxydiphenyl ether include 4,4'-dihydroxydiphenyl ether, 4,4'-dihydroxydiphenyl ester, ...ether, 4,4'-dihydroxydiphenyl ester, 4,4'-dihydroxydiphenyl ether, 4,4'-dihydroxydiphenyl ether, 4,4'-dihydroxydiphenyl ester, 4,4'-dihydroxydiphenyl ether, 4,4'-dihydroxydiphenyl ether, 4,4'-dihydroxydiphenyl ester, 4,4'-dihydroxydiphenyl ether, 4,4'-dihydroxydiphenyl ether, 4,4'-dihydroxydiphenyl ester, 4,4'-dihydroxydiphenyl ether, 4,4'-dihydroxydiphenyl ether, 4,4'-dihydroxydiphenyl ether, 4,4'-dihydroxydiphenyl ester, 4,4'-dihydroxydiphenyl ether, 4,4'-dihydroxydiphenyl ether, 4,4'-dihydroxydiphenyl ether, 4,4'-dihydroxydiphenyl ether, 4,4'-di

[0022] Among these, homopolymers or copolymers obtained from at least one bisphenol selected from the group consisting of bisphenol A, 2,2-bis{(4-hydroxy-3-methyl)phenyl}propane, 2,2-bis(4-hydroxyphenyl)butane, 2,2-bis(4-hydroxyphenyl)-3-methylbutane, 2,2-bis(4-hydroxyphenyl)-3,3-dimethylbutane, 2,2-bis(4-hydroxyphenyl)-4-methylpentane, 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane, and α,α'-bis(4-hydroxyphenyl)-m-diisopropylbenzene are preferred, and homopolymers of bisphenol A and copolymers of 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane with bisphenol A, 2,2-bis{(4-hydroxy-3-methyl)phenyl}propane, or α,α'-bis(4-hydroxyphenyl)-m-diisopropylbenzene are particularly preferred.

[0023] Examples of carbonate precursors include carbonyl halides, carbonate esters, and haloformates, and specific examples thereof include phosgene, diphenyl carbonate, and dihaloformates of dihydric phenols.

[0024] When the polycarbonate resin is produced by reacting the dihydric phenol with the carbonate precursor by the interfacial polycondensation method or the melt transesterification method, a catalyst, a terminal terminator, an antioxidant for the dihydric phenol, etc. may be used as required.

[0025] The polycarbonate resin may be a branched polycarbonate resin copolymerized with a trifunctional or higher polyfunctional aromatic compound, or a polyester carbonate resin copolymerized with an aromatic or aliphatic bifunctional carboxylic acid, or may be a mixture of two or more of the obtained polycarbonate resins.

[0026] Specific examples of trifunctional or higher polyfunctional aromatic compounds include phloroglucin, phloroglucside, 4,6-dimethyl-2,4,6-tris(4-hydroxyphenyl)heptene-2,2,4,6-trimethyl-2,4,6-tris(4-hydroxyphenyl)heptane, 1,3,5-tris(4-hydroxyphenyl)benzene, 1,1,1-tris(4-hydroxyphenyl)ethane, 1,1,1-tris(3,5-dimethyl-4-hydroxyphenyl)ethane, 2,6-bis(2-hydroxy-5-methylbenzyl)-4-methylphenol, 4-[4-[1,1-bis(4-hydroxyphenyl)] )ethyl]benzene}-α,α-dimethylbenzylphenol; tetra(4-hydroxyphenyl)methane, bis(2,4-dihydroxyphenyl)ketone, 1,4-bis(4,4-dihydroxytriphenylmethyl)benzene; trimellitic acid, pyromellitic acid, benzophenonetetracarboxylic acid, and acid chlorides thereof. Among these, 1,1,1-tris(4-hydroxyphenyl)ethane and 1,1,1-tris(3,5-dimethyl-4-hydroxyphenyl)ethane are preferred, and 1,1,1-tris(4-hydroxyphenyl)ethane is particularly preferred.

[0027] When the polyfunctional compound that produces the branched polycarbonate resin is contained, the proportion thereof is preferably 0.001 to 1 mol%, more preferably 0.005 to 0.5 mol%, and even more preferably 0.01 to 0.3 mol%, based on the total amount of the aromatic polycarbonate. Furthermore, particularly in the case of the melt transesterification method, branched structures may be produced as a side reaction, and the amount of such branched structures is also preferably 0.001 to 1 mol%, more preferably 0.005 to 0.5 mol%, and even more preferably 0.01 to 0.3 mol%, based on the total amount of the aromatic polycarbonate. Regarding this proportion, 1 It can be calculated by H-NMR measurement.

[0028] The reaction by the interfacial polycondensation method is typically a reaction between a dihydric phenol and phosgene, and is carried out in the presence of an acid binder and an organic solvent. Specific examples of the acid binder include alkali metal hydroxides such as sodium hydroxide and potassium hydroxide, and amine compounds such as pyridine. Specific examples of the organic solvent include halogenated hydrocarbons such as methylene chloride and chlorobenzene. To promote the reaction, a catalyst such as a tertiary amine, a quaternary ammonium compound, or a quaternary phosphonium compound, such as triethylamine, tetra-n-butylammonium bromide, or tetra-n-butylphosphonium bromide, can also be used. The reaction conditions are not particularly limited; for example, the reaction temperature is typically 0 to 40°C, the reaction time is preferably about 10 minutes to 5 hours, and the pH during the reaction is preferably maintained at 9 or higher.

[0029] In the above polymerization reaction, a terminal terminator is usually used. Monofunctional phenols can be used as such terminal terminators. Monofunctional phenols are generally used as terminal terminators for molecular weight control. Specific examples of the monofunctional phenols are generally phenol or lower alkyl-substituted phenols, such as the monofunctional phenols represented by the following general formula (2):

[0030] (In the formula, D is a hydrogen atom, a linear or branched alkyl group having 1 to 9 carbon atoms, or a phenyl-substituted alkyl group, and r is an integer of 1 to 5, preferably 1 to 3.)

[0031] Specific examples of the monofunctional phenols include phenol, p-tert-butylphenol, p-cumylphenol, and isooctylphenol.

[0032] Other monofunctional phenols include phenols having a long-chain alkyl group or an aliphatic polyester group as a substituent, benzoic acid chlorides, long-chain alkylcarboxylic acid chlorides, etc. Among these, phenols having a long-chain alkyl group as a substituent, represented by the following general formulas (3) and (4), are preferably used.

[0033] (In the formula, n represents an integer of 10 to 50.)

[0034] (In the formula, E is -R-O-, -R-C(=O)-O-, or -R-O-C(=O)-, R is a single bond or a divalent aliphatic hydrocarbon group having 1 to 10, preferably 1 to 5, carbon atoms, and n is an integer of 10 to 50.)

[0035] As the substituted phenols represented by the above general formula (3), those in which n is 10 to 30 are preferred, and those in which n is 10 to 26 are more preferred, and specific examples thereof include decylphenol, dodecylphenol, tetradecylphenol, hexadecylphenol, octadecylphenol, eicosylphenol, docosylphenol, triacontylphenol, etc.

[0036] As the substituted phenol represented by the above general formula (4), a compound in which E is -R-C(=O)-O- and R is a single bond is preferred, and one in which n is 10 to 30, particularly 10 to 26, is suitable, and specific examples thereof include decyl hydroxybenzoate, dodecyl hydroxybenzoate, tetradecyl hydroxybenzoate, hexadecyl hydroxybenzoate, eicosyl hydroxybenzoate, docosyl hydroxybenzoate, triacontyl hydroxybenzoate, etc. These end-terminators may be used alone or in combination of two or more.

[0037] The reaction using the melt transesterification method is typically a transesterification reaction between a dihydric phenol and a carbonate ester, and is carried out, for example, by mixing the dihydric phenol and the carbonate ester while heating them in the presence of an inert gas, and distilling off the resulting alcohol or phenol. The reaction conditions are not particularly limited, and the reaction temperature varies depending on factors such as the boiling point of the resulting alcohol or phenol, but is typically preferably 120 to 350°C. In the latter stage of the reaction, it is preferable to reduce the pressure of the system to about 1.33 x 10 to 13.3 Pa to facilitate distillation of the resulting alcohol or phenol. The reaction time is typically preferably about 1 to 4 hours.

[0038] Examples of carbonate esters include esters of an aryl group having 6 to 10 carbon atoms, an aralkyl group having 7 to 10 carbon atoms, an alkyl group having 1 to 4 carbon atoms, and the like, which may be substituted. Specific examples thereof include diphenyl carbonate, bis(chlorophenyl)carbonate, dinaphthyl carbonate, bis(diphenyl)carbonate, dimethyl carbonate, diethyl carbonate, and dibutyl carbonate, with diphenyl carbonate being preferred.

[0039] In addition, a polymerization catalyst can be used to increase the polymerization rate. Examples of such polymerization catalysts include alkali metal compounds such as sodium hydroxide, potassium hydroxide, and sodium and potassium salts of dihydric phenols; alkaline earth metal compounds such as calcium hydroxide, barium hydroxide, and magnesium hydroxide; nitrogen-containing basic compounds such as tetramethylammonium hydroxide, tetraethylammonium hydroxide, trimethylamine, and triethylamine; alkoxides of alkali metals and alkaline earth metals; organic acid salts of alkali metals and alkaline earth metals; zinc compounds, boron compounds, aluminum compounds, silicon compounds, germanium compounds, organic tin compounds, lead compounds, osmium compounds, antimony compounds, manganese compounds, titanium compounds, and zirconium compounds, which are commonly used in esterification and transesterification reactions. The catalysts may be used alone or in combination of two or more. The amount of these polymerization catalysts used is preferably 1 × 10 per 1 mole of the raw material dihydric phenol. -8 ~1 x 10 -3 equivalent, more preferably 1 x 10 -7 ~5 x 10 -4 It is selected within the range of equivalents.

[0040] In order to reduce the number of phenolic terminal groups in the polymerization reaction, compounds such as bis(chlorophenyl)carbonate, bis(bromophenyl)carbonate, bis(nitrophenyl)carbonate, bis(phenylphenyl)carbonate, chlorophenylphenylcarbonate, bromophenylphenylcarbonate, nitrophenylphenylcarbonate, phenylphenylcarbonate, methoxycarbonylphenylphenylcarbonate, and ethoxycarbonylphenylphenylcarbonate can be added in the latter stage of the polycondensation reaction or after its completion. Of these, 2-chlorophenylphenylcarbonate, 2-methoxycarbonylphenylphenylcarbonate, and 2-ethoxycarbonylphenylphenylcarbonate are preferred, with 2-methoxycarbonylphenylphenylcarbonate being more preferred.

[0041] Furthermore, in the polymerization reaction, it is preferable to use a deactivator that neutralizes the activity of the catalyst. Specific examples of this deactivator include sulfonic acid esters such as benzenesulfonic acid, p-toluenesulfonic acid, methyl benzenesulfonate, ethyl benzenesulfonate, butyl benzenesulfonate, octyl benzenesulfonate, phenyl benzenesulfonate, methyl p-toluenesulfonate, ethyl p-toluenesulfonate, butyl p-toluenesulfonate, octyl p-toluenesulfonate, and phenyl p-toluenesulfonate; and further, naphthalenesulfonic acid, sulfonated polystyrene, methyl acrylate-sulfonated styrene copolymer, 2-phenyl-2-propyl dodecylbenzenesulfonate, 2-phenyl-2-butyl dodecylbenzenesulfonate, tetrabutyl phosphonium octyl sulfonate, tetrabutyl decyl sulfonate, tetrabutyl phosphonium benzenesulfonate, and tetraethyl dodecylbenzenesulfonate. Examples of suitable deactivators include, but are not limited to, compounds such as tetrabutyl phosphonium dodecylbenzenesulfonate, tetrahexyl phosphonium dodecylbenzenesulfonate, tetraoctyl phosphonium dodecylbenzenesulfonate, decylammonium butyl sulfate, decylammonium decyl sulfate, dodecylammonium methyl sulfate, dodecylammonium ethyl sulfate, dodecylmethylammonium methyl sulfate, dodecyldimethylammonium tetradecyl sulfate, tetradecyldimethylammonium methyl sulfate, tetramethylammonium hexyl sulfate, decyltrimethylammonium hexadecyl sulfate, tetrabutylammonium dodecylbenzyl sulfate, tetraethylammonium dodecylbenzyl sulfate, and tetramethylammonium dodecylbenzyl sulfate. These compounds may be used alone or in combination of two or more. Among the deactivators, phosphonium salts or ammonium salts are preferred.

[0042] The amount of these deactivators is preferably 0.5 to 50 moles per mole of the remaining catalyst, and is preferably 0.01 to 500 ppm, more preferably 0.01 to 300 ppm, and even more preferably 0.01 to 100 ppm, based on the polycarbonate resin after polymerization.

[0043] The molecular weight of the aromatic polycarbonate resin of component (A) is not particularly limited, but from the viewpoint of high temperature mechanical properties and moldability, the viscosity average molecular weight is preferably 10,000 to 50,000, more preferably 14,000 to 45,000, and even more preferably 14,000 to 40,000. The viscosity average molecular weight is calculated by measuring the intrinsic viscosity [η] of a methylene chloride solution at 20°C and calculating the viscosity average molecular weight using Schnell's formula ([η] = 1.23 × 10 -5 ×Mv 0.83 The component (A) may be used alone or in combination of two or more types.

[0044] As the component (A), commercially available products can be used, and examples thereof include NOVAREX M-7027U, M-7025U (branched polycarbonate resins manufactured by Mitsubishi Engineering-Plastics Corporation), PANLITE K-1300Y (polymeric polycarbonate resin manufactured by Teijin Limited), TAFLON IR-2500 (polymeric polycarbonate resin manufactured by Idemitsu Kosan Co., Ltd.), FN-2200 (standard polycarbonate resin manufactured by Idemitsu Kosan Co., Ltd.), and Iupilon S-3000N (standard polycarbonate resin manufactured by Mitsubishi Engineering-Plastics Corporation).

[0045] Generally, commercially available high-molecular-weight and branched-type aromatic polycarbonate resins are aromatic polycarbonate resins with high viscosity-average molecular weights, which tend to have a low melt volume flow rate (MVR), which is an index of flowability and moldability, and are therefore preferred. The component (A) in the flame-retardant aromatic polycarbonate resin composition of the present invention has an MVR of 2 to 8 cm at 300°C under a load of 1.2 kg according to ISO 1133-1. 3The aromatic polycarbonate resin having a viscosity of 1000 psi or less is contained in an amount of 20% by mass or more, preferably 30% by mass or more, more preferably 50% by mass or more, based on the total mass of the component (A). If the aromatic polycarbonate resin is less than 20% by mass, drip resistance cannot be obtained. The upper limit is not particularly limited, but is preferably 95% by mass or less, more preferably 90% by mass or less. In addition, if the MVR is 2 cm 3 If the time is less than 10 minutes, the fluidity is insufficient and the moldability tends to be poor. 3 If the time exceeds 1 / minute, impact resistance etc. will decrease.

[0046] The aromatic polycarbonate resin of component (A) preferably does not contain a halogen-substituted skeleton such as a halogen-substituted dihydric phenol in the molecule.

[0047] The aromatic polycarbonate resin of component (A) may also contain an aromatic polycarbonate resin recycled from used products (a so-called material recycled polycarbonate resin), or an aromatic polycarbonate resin produced from an aromatic polycarbonate resin that has been chemically decomposed and returned to its raw materials (a so-called chemically recycled polycarbonate resin).

[0048] [Component (B)] The component (B) in the flame-retardant aromatic polycarbonate resin composition of the present invention is an organohydrogenpolysiloxane having a structural unit ratio represented by the following formula (1): [(R 1 O) (R 2 ) SiO 1 / 2 ] a [(R 3 ) 3SiO 1 / 2 ] b [(H)(R 4 ) SiO 2 / 2 ] c [(Ar) x (R 5 ) 2-x SiO 2 / 2 ] d [(R 6 ) SiO 2 / 2 ] e [(R 7 ) SiO 3 / 2 ] f(1)

[0049] In the formula, R 1 is a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and R 2 and R 3 are each independently a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or an aryl group having 6 to 12 carbon atoms, and R 4 is an alkyl group having 1 to 6 carbon atoms or an aryl group having 6 to 12 carbon atoms, each Ar is independently an aryl group having 6 to 12 carbon atoms, R 5 and R 6 are each independently an alkyl group having 1 to 6 carbon atoms, and R 7 are each independently an alkenyl group having 2 to 8 carbon atoms, an aryl group having 6 to 12 carbon atoms, or an alkyl group having 1 to 8 carbon atoms which may be substituted with epoxy, amino, acryloyl, methacryloyl, or thiol. x represents 1 or 2, a is a number satisfying 0<a≦0.03, b is a number satisfying 0<b≦0.30, c is a number satisfying 0≦c≦0.45, d is a number satisfying 0.20≦d≦0.70, e is a number satisfying 0≦e≦0.20, f is a number satisfying 0≦f≦0.70, and a+b+c+d+e+f is 1. However, when c is 0, R 2 and R 3 At least one of the groups is a hydrogen atom.

[0050] R 1 Specific examples of the alkyl group having 1 to 3 carbon atoms include methyl, ethyl, and propyl groups. 1 is preferably a hydrogen atom or a methyl group.

[0051] R 2 and R 3 The alkyl group having 1 to 6 carbon atoms is preferably one having 1 to 3 carbon atoms, specific examples of which include methyl, ethyl, propyl, butyl, pentyl, and hexyl groups, and the aryl group having 6 to 12 carbon atoms is preferably one having 6 to 10 carbon atoms, specific examples of which include phenyl, tolyl, xylyl, and naphthyl groups. 2 and R 3is preferably a hydrogen atom, a methyl group, or a phenyl group, and more preferably a methyl group.

[0052] R 4 Specific examples of the alkyl group having 1 to 6 carbon atoms or the aryl group having 6 to 12 carbon atoms include the above-mentioned R 2 and R 3 Among them, R 4 is preferably a methyl group or a phenyl group, and more preferably a methyl group.

[0053] The aryl group having 6 to 12 carbon atoms represented by Ar is preferably an aryl group having 6 to 10 carbon atoms, and specific examples thereof include the above-mentioned R 2 and R 3 Among them, a phenyl group is preferred.

[0054] R 5 and R 6 The alkyl group having 1 to 6 carbon atoms is preferably an alkyl group having 1 to 3 carbon atoms, and specific examples thereof include the above-mentioned R 2 and R 3 Among them, a methyl group is preferred.

[0055] R 7 The alkenyl group having 2 to 8 carbon atoms is preferably an alkenyl group having 2 to 6 carbon atoms, and specific examples thereof include vinyl, allyl, butenyl, hexenyl, and octenyl groups. Specific examples of the aryl group having 6 to 12 carbon atoms include the above-mentioned R 2 and R 3 Specific examples of the alkyl group having 1 to 8 carbon atoms which may be substituted with an epoxy group, an amino group, an acryloyl group, a methacryloyl group or a thiol group include methyl, ethyl, propyl, butyl, hexyl, octyl, glycidoxypropyl, aminopropyl, (meth)acryloylpropyl, and mercaptopropyl groups. Among these, R 7is preferably a methyl group, a glycidoxypropyl group, an aminopropyl group, a (meth)acryloylpropyl group, a mercaptopropyl group, or a phenyl group, more preferably a methyl group or a phenyl group, and even more preferably a phenyl group.

[0056] a is a number that satisfies 0<a≦0.03, but preferably satisfies 0.005≦a≦0.025. b is a number that satisfies 0<b≦0.30, but preferably satisfies 0.01≦b≦0.25. c is a number that satisfies 0≦c≦0.45, but preferably satisfies 0.1≦c≦0.40. d is a number that satisfies 0.20≦d≦0.70, but preferably satisfies 0.22≦d≦0.40. e is a number that satisfies 0≦e≦0.20, but preferably satisfies 0.02≦e≦0.15. f is a number that satisfies 0≦f≦0.70, but preferably satisfies 0≦f≦0.60. x is 1 or 2, but preferably 2. However, when c is 0, R 2 and R 3 At least one of R is a hydrogen atom; 3 It is preferred that one of the groups is a hydrogen atom.

[0057] The arrangement order of the siloxane units in component (B) is not particularly limited, and may be any of random copolymerization, block copolymerization, and tapered copolymerization.

[0058] As the component (B), in formula (1), Ar is a phenyl group and x is preferably 2, and Ar is a phenyl group, x is 2, and f is more preferably 0. Specific examples of the component (B) include, but are not limited to, those represented by the following formula: [(R 11 O)(CH)SiO 1 / 2 ] a [(CH3)3SiO 1 / 2 ] b [H(CH)SiO 2 / 2 ] c1 [(C6H5)2SiO 2 / 2 ] d [(CH)SiO 2 / 2 ] e1 [(R 11 O)(CH)SiO1 / 2 ] a [H(CH)SiO 1 / 2 ] b [(C6H5)2SiO 2 / 2 ] d [(CH)SiO 2 / 2 ] e1 [C6H5SiO 3 / 2 ] f1 (In the formula, R 11 is a hydrogen atom or a methyl group, and a, b, d, and f are the same as above. c1 is a number that satisfies 0.1≦c1≦0.40, e1 is a number that satisfies 0.02≦e1≦0.15, and f1 is a number that satisfies 0.10≦f1≦0.60.

[0059] The weight-average molecular weight (Mw) of component (B) measured by gel permeation chromatography (GPC) is 700 to 10,000, preferably 800 to 9,000. If Mw is less than 700, component (B) tends to volatilize during kneading, resulting in a reduced amount of component (B) blended and failing to achieve flame retardant effects. On the other hand, if Mw is greater than 10,000, the compatibility and dispersibility with component (A) decrease, resulting in a decrease in the transparency and flame retardancy of the composition.

[0060] Component (B) contains chloride ions (Cl) derived from the acid catalyst used in the production. - ) and sulfate ions (SO4 2- ) may remain, and these remaining ions may cause thermal decomposition of the composition and corrosion of metal parts of the apparatus at high temperatures during kneading, injection molding, etc., so the content of chloride ions and sulfate ions relative to the mass of component (B) is preferably 3 ppm by mass or less.

[0061] Furthermore, if component (B) contains volatile components, evaporation of the volatile components during kneading or injection molding may cause problems such as molding defects. Therefore, it is preferable that the mass loss when heated at 150°C for 30 minutes at 1 atmosphere is 3% by mass or less relative to the mass of component (B).

[0062] The volume of hydrogen gas generated per unit mass of component (B) by alkaline decomposition is preferably 30 to 80 mL / g. It is more preferably 40 to 70 mL / g. A volume of 30 mL / g or more facilitates the formation of a structure for component (B), thereby suppressing dripping during combustion. A volume of 80 mL / g or less prevents excess Si—H groups from reacting with moisture in the air during heat treatment to generate hydrogen gas from the resin composition, resulting in foaming and clouding of the molded product. Here, the structure of component (B) refers to a network structure formed by the mutual reaction of the organohydrogenpolysiloxane itself or the reaction between the aromatic polycarbonate resin and the organohydrogenpolysiloxane.

[0063] As reported in the aforementioned Patent Documents 6 and 7, organohydrogenpolysiloxanes containing Si—H groups and aromatic groups in the molecule are known to function as flame retardants. In the present invention, component (B) further contains, in addition to these groups, [(R 1 O) (R 2 ) SiO 1 / 2 ](R 1 and R 2 is the same as above. The same applies hereinafter.) The presence of the structural unit represented by (R 1 O) groups and (R 1 It is presumed that dripping is suppressed by increasing the formation of a structure due to crosslinking between the Si—O) groups and the Si—H groups.

[0064] In the flame-retardant aromatic polycarbonate resin composition of the present invention, from the viewpoint of improving the dispersibility of component (B) and suppressing the composition from becoming cloudy or losing transparency due to wet heat treatment, the amount of aryl groups in component (B) is preferably 10 to 80% by mass, more preferably 15 to 70% by mass. Here, the amount of aryl groups can be calculated using the following formula: Amount of aryl groups = [A / M] x 100 (% by mass), where A is the total formula weight of aryl groups per molecule of component (B), and M is the weight-average molecular weight of component (B).

[0065] The component (B) may be used alone or in combination of two or more.

[0066] The blending amount of component (B) is 0.1 to 10 parts by mass, preferably 0.5 to 7 parts by mass, and more preferably 1 to 5 parts by mass, per 100 parts by mass of the aromatic polycarbonate resin of component (A). If the blending amount is less than 0.1 part by mass, flame retardancy cannot be obtained, and if the blending amount exceeds 10 parts by mass, the transparency of the composition decreases and molding defects occur.

[0067] The organohydrogenpolysiloxane of component (B) can be obtained, for example, by co-hydrolysis and condensation of organochlorosilanes and then removing the by-product hydrochloric acid and low-boiling components. 1 O) (R 2 ) SiO 1 / 2 ] unit can be introduced by using a silane having a Si-H group, such as dimethylchlorosilane (H(CH3)2SiCl), as a raw material, and converting the hydrogen atom of the Si-H group to R by the hydrochloric acid produced as a by-product during the reaction. 1 It can be easily converted to an O group.

[0068] Furthermore, when linear siloxanes, cyclic siloxanes, or alkoxysilanes are used as starting materials, the organohydrogenpolysiloxane of component (B) can be obtained by carrying out an equilibration reaction and a condensation reaction using an acid catalyst such as sulfuric acid or methanesulfonic acid, and then removing the acid catalyst and low-boiling components used. In this case, hexamethyldisiloxane or the like is used as the terminal component, and an equilibration reaction is carried out using a highly acidic acid such as trifluoromethanesulfonic acid or p-toluenesulfonic acid to form trimethylsilyl groups [(CH3)3SiO 1 / 2 ] is partially cleaved, and R 1 It is converted to an O group.

[0069] [Component (C)] Component (C) in the flame-retardant aromatic polycarbonate resin composition of the present invention is at least one selected from the group consisting of fluorine-free organic alkali metal salts and fluorine-free organic alkaline earth metal salts, and is a component that improves flame retardancy. It is preferable that the aromatic polycarbonate resin composition of the present invention does not contain fluorinated organic alkali metal salts and organic alkaline earth metal salts, such as potassium perfluorobutanesulfonate, which are typical conventional flame retardants.

[0070] Specific examples of alkali metals include lithium, sodium, potassium, rubidium, and cesium, and specific examples of alkaline earth metals include beryllium, magnesium, calcium, strontium, and barium, with lithium, sodium, and potassium being particularly preferred.

[0071] As the fluorine-free organic metal salt, alkali metal salts of aliphatic sulfonic acids, alkaline earth metal salts of aliphatic sulfonic acids, alkali metal salts of aromatic sulfonic acids, and alkaline earth metal salts of aromatic sulfonic acids, all of which do not contain fluorine, are preferred, and from the viewpoint of dispersibility in component (A), alkali metal salts of fluorine-free aromatic sulfonic acids and alkaline earth metal salts of fluorine-free aromatic sulfonic acids are more preferred.

[0072] Examples of the aliphatic sulfonic acid include methanesulfonic acid, ethanesulfonic acid, propanesulfonic acid, butanesulfonic acid, methylbutanesulfonic acid, hexanesulfonic acid, heptanesulfonic acid, and octanesulfonic acid.

[0073] Specific examples of alkali (earth) metal salts of fluorine-free aliphatic sulfonic acids include lithium methanesulfonate, sodium methanesulfonate, potassium methanesulfonate, lithium butanesulfonate, sodium butanesulfonate, potassium butanesulfonate, magnesium methanesulfonate, calcium methanesulfonate, and barium methanesulfonate.

[0074] Examples of aromatic sulfonic acids include sulfonic acids of monomeric or polymeric aromatic sulfides, sulfonic acids of aromatic carboxylic acids and esters thereof, sulfonic acids of monomeric or polymeric aromatic ethers, sulfonic acids of aromatic sulfonates, monomeric or polymeric aromatic sulfonic acids, monomeric or polymeric aromatic sulfone sulfonic acids, sulfonic acids of aromatic ketones, heterocyclic sulfonic acids, sulfonic acids of aromatic sulfoxides, and condensates of aromatic sulfonic acids with a methylene bond.

[0075] Specific examples of alkali (earth) metal sulfonates of monomeric or polymeric aromatic sulfides include disodium diphenylsulfide-4,4'-disulfonate and dipotassium diphenylsulfide-4,4'-disulfonate.

[0076] Specific examples of alkali (earth) metal sulfonates of aromatic carboxylic acids and their esters include potassium 5-sulfoisophthalate, sodium 5-sulfoisophthalate, and polysodium polyethylene terephthalate polysulfonate.

[0077] Specific examples of the alkali (earth) metal sulfonate salts of monomeric or polymeric aromatic ethers include calcium 1-methoxynaphthalene-4-sulfonate, disodium 4-dodecylphenyl ether disulfonate, polysodium poly(2,6-dimethylphenylene oxide) polysulfonate, polysodium poly(1,3-phenylene oxide) polysulfonate, polysodium poly(1,4-phenylene oxide) polysulfonate, polypotassium poly(2,6-diphenylphenylene oxide) polysulfonate, and lithium poly(2-fluoro-6-butylphenylene oxide) polysulfonate.

[0078] Specific examples of alkali (earth) metal sulfonates of aromatic sulfonates include potassium sulfonate of benzenesulfonate.

[0079] Specific examples of the monomeric or polymeric alkali (earth) metal salt of aromatic sulfonate include sodium benzenesulfonate, strontium benzenesulfonate, magnesium benzenesulfonate, potassium p-toluenesulfonate, dipotassium p-benzenedisulfonate, dipotassium naphthalene-2,6-disulfonate, calcium biphenyl-3,3′-disulfonate, and sodium polystyrenesulfonate.

[0080] Specific examples of the monomeric or polymeric alkali (earth) metal salt of aromatic sulfone sulfonate include sodium diphenylsulfone-3-sulfonate, potassium diphenylsulfone-3-sulfonate, dipotassium diphenylsulfone-3,3'-disulfonate, and dipotassium diphenylsulfone-3,4'-disulfonate.

[0081] Specific examples of alkali (earth) metal sulfonates of aromatic ketones include dipotassium benzophenone-3,3'-disulfonate.

[0082] Specific examples of the alkali (earth) metal salt of heterocyclic sulfonate include disodium thiophene-2,5-disulfonate, dipotassium thiophene-2,5-disulfonate, calcium thiophene-2,5-disulfonate, and sodium benzothiophenesulfonate.

[0083] Specific examples of alkali (earth) metal sulfonates of aromatic sulfoxides include potassium diphenyl sulfoxide-4-sulfonate.

[0084] Specific examples of the condensation product of an aromatic alkali (earth) metal sulfonate with a methylene bond include a formalin condensation product of sodium naphthalenesulfonate and a formalin condensation product of sodium anthracenesulfonate.

[0085] Component (C) can also be a fluorine-free alkali (earth) metal salt of a sulfate, and examples of the alkali (earth) metal salt of a sulfate include alkali (earth) metal salts of sulfates of monohydric or polyhydric alcohols. Specific examples of the sulfates of monohydric or polyhydric alcohols include methyl sulfate, ethyl sulfate, lauryl sulfate, hexadecyl sulfate, sulfates of polyoxyethylene alkylphenyl ethers, mono-, di-, tri-, or tetrasulfates of pentaerythritol, sulfates of lauric acid monoglyceride, sulfates of palmitic acid monoglyceride, and sulfates of stearic acid monoglyceride. Among these, alkali (earth) metal salts of lauryl sulfate are preferred.

[0086] The component (C) may be used alone or in combination of two or more. Of these, potassium diphenylsulfone-3-sulfonate and sodium polystyrenesulfonate are preferred as the component (C).

[0087] The blending amount of component (C) is 0.001 to 1.0 part by mass, preferably 0.001 to 0.5 part by mass, more preferably 0.005 to 0.45 part by mass, and even more preferably 0.005 to 0.4 part by mass, per 100 parts by mass of component (A). If it is less than 0.001 part by mass, flame retardancy cannot be obtained, and if it exceeds 1.0 part by mass, the transparency of the composition decreases and molding defects occur.

[0088] [Other Components] The flame-retardant aromatic polycarbonate resin composition of the present invention may contain other components such as thermoplastic resins other than component (A) and additives, as long as the object of the present invention is not impaired.

[0089] Specific examples of thermoplastic resins other than component (A) include general-purpose plastics such as polyethylene resin, polypropylene resin, polystyrene resin, polyacrylstyrene resin, ABS resin, AS resin, AES resin, ASA resin, SMA resin, and polyalkyl methacrylate resin; engineering plastics such as aliphatic polycarbonate resin, polyphenylene ether resin, polyacetal resin, aromatic polyester resin, polyamide resin, cyclic polyolefin resin, and polyarylate resin (amorphous polyarylate, liquid crystal polyarylate); and so-called super engineering plastics such as polyether ether ketone, polyetherimide, polysulfone, polyethersulfone, and polyphenylene sulfide. Furthermore, thermoplastic elastomers such as styrene-based thermoplastic elastomers, olefin-based thermoplastic elastomers, polyamide-based thermoplastic elastomers, polyester-based thermoplastic elastomers, and polyurethane-based thermoplastic elastomers can also be used. These thermoplastic resins can be blended to the extent that they do not affect flame retardancy.

[0090] Specific examples of additives include reinforcing agents (talc, mica, clay, wollastonite, calcium carbonate, glass fiber, glass beads, glass balloons, milled fiber, glass flakes, carbon fiber, carbon flakes, carbon beads, carbon milled fiber, metal flakes, metal fibers, metal-coated glass fiber, metal-coated carbon fiber, metal-coated glass flakes, silica, ceramic particles, ceramic fibers, aramid particles, aramid fibers, polyarylate fibers, graphite, conductive carbon black, various whiskers, etc.), flame retardants (halogen-based, The flame-retardant aromatic polycarbonate resin composition of the present invention may contain additives such as phosphate esters, red phosphorus, metal hydrates, heat stabilizers, antioxidants, release agents, ultraviolet absorbers, light stabilizers, lubricants, sliding agents, colorants (pigments and dyes such as carbon black and titanium oxide), light diffusers (acrylic crosslinked particles, silicone crosslinked particles, ultrathin glass flakes, calcium carbonate particles, etc.), fluorescent brighteners, phosphorescent pigments, fluorescent dyes, antistatic agents, flow modifiers, crystal nucleating agents, inorganic and organic antibacterial agents, photocatalytic antifouling agents (fine particle titanium oxide, fine particle zinc oxide, etc.), impact modifiers such as graft rubber, infrared absorbers, photochromic agents, etc. Preferably, fluorine-containing additives are not included in the various additives used in the flame-retardant aromatic polycarbonate resin composition of the present invention.

[0091] Examples of the heat stabilizer include phosphorus-based stabilizers, etc. As the phosphorus-based stabilizer, any of phosphite-based, phosphonite-based, phosphate-based compounds can be used.

[0092] Specific examples of the phosphite compound include distearyl pentaerythritol diphosphite, bis(2,4-di-tert-butylphenyl)pentaerythritol diphosphite, bis(2,6-di-tert-butyl-4-methylphenyl)pentaerythritol diphosphite, and 4,4′-isopropylidenediphenol tetratridecyl phosphite.

[0093] Specific examples of the phosphonite compound include tetrakis(2,4-di-tert-butylphenyl)-4,4'-biphenylene diphosphonite, tetrakis(2,4-di-tert-butylphenyl)-4,3'-biphenylene diphosphonite, tetrakis(2,4-di-tert-butylphenyl)-3,3'-biphenylene diphosphonite, bis(2,4-di-tert-butylphenyl)-4-phenyl-phenylphosphonite, bis(2,4-di-tert-butylphenyl)-3-phenyl-phenylphosphonite, and the like.

[0094] A specific example of the phosphate stabilizer is trimethyl phosphate.

[0095] Examples of the antioxidant include phenol-based antioxidants and sulfur-based antioxidants.

[0096] The phenolic antioxidant can suppress discoloration when exposed to heat and also has the effect of improving flame retardancy. Specific examples of phenolic antioxidants include vitamin E, n-octadecyl-β-(4'-hydroxy-3',5'-di-tert-butylphenyl)propionate, 2-tert-butyl-6-(3'-tert-butyl-5'-methyl-2'-hydroxybenzyl)-4-methylphenyl acrylate, 3,9-bis{2-[3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionyloxy]-1,1,-dimethylethyl}-2,4,8,10-tetraoxaspiro[5,5]undecane, tetrakis[methylene-3-(3',5'-di-tert-butyl-4-hydroxyphenyl)propionate]methane, and further include n-octadecyl-β-(4'-hydroxy-3',5'-di-tert-butylphenyl)propionate.

[0097] Sulfur-based antioxidants are particularly suitable when the molding method is rotational molding or compression molding. Specific examples of sulfur-based antioxidants include dilauryl-3,3'-thiodipropionic acid ester, ditridecyl-3,3'-thiodipropionic acid ester, dimyristyl-3,3'-thiodipropionic acid ester, distearyl-3,3'-thiodipropionic acid ester, laurylstearyl-3,3'-thiodipropionic acid ester, pentaerythritol tetra(β-laurylthiopropionate) ester, bis[2-methyl-4-(3-laurylthiopropionyloxy)-5-tert-butylphenyl]sulfide, octadecyl disulfide, mercaptobenzimidazole, 2-mercapto-6-methylbenzimidazole, and 1,1'-thiobis(2-naphthol).

[0098] When these phosphorus-based stabilizers, phenol-based antioxidants, and sulfur-based antioxidants are used, the blending amount thereof is preferably 0.0001 to 1 part by mass, more preferably 0.0005 to 0.5 parts by mass, and even more preferably 0.001 to 0.2 parts by mass, per 100 parts by mass of component (A).

[0099] Examples of the release agent include saturated fatty acid esters, unsaturated fatty acid esters, polyolefin waxes, modified polyolefin waxes, polysiloxanes other than component (B) (for example, linear or cyclic polydimethylsiloxanes, linear or cyclic polymethylphenylsiloxanes, functional group-modified polysiloxanes, etc.), paraffin wax, beeswax, saturated fatty acid esters (for example, monoglycerides such as stearic acid monoglyceride, polyglycerol fatty acid esters such as decaglycerol deca- stearate and decaglycerol tetrastearate, lower fatty acid esters such as stearic acid stearate, higher fatty acid esters such as sebacate behenate, and erythritol esters such as pentaerythritol tetrastearate), and among these, saturated fatty acid esters, linear or cyclic polydimethylsiloxanes, and linear or cyclic polymethylphenylsiloxanes are preferred.

[0100] When a release agent is used, the amount added is preferably 0.01 to 0.3 parts by weight per 100 parts by weight of component (A).

[0101] Examples of the ultraviolet absorber include a benzophenone-based ultraviolet absorber, a benzotriazole-based ultraviolet absorber, and a hydroxyphenyltriazine-based ultraviolet absorber.

[0102] Specific examples of the benzophenone-based ultraviolet absorber include 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-n-octoxybenzophenone, 2-hydroxy-4-n-dodecyloxybenzophenone, 2-hydroxy-4-benzyloxybenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxy-2'-carboxybenzophenone, 2-hydroxy-4-methoxy-5-sulfoxybenzophenone, 2,2'-dihydroxy-4,4'-dimethoxybenzophenone, 2,2',4,4'-tetrahydroxybenzophenone, 2,2'-dihydroxy-4,4'-dimethoxy-5-sodium sulfoxybenzophenone, and bis(5-benzoyl-4-hydroxy-2-methoxyphenyl)methane.

[0103] Specific examples of benzotriazole-based ultraviolet absorbers include 2-(2'-hydroxy-5'-methylphenyl)benzotriazole, 2-(2'-hydroxy-5'-tert-butylphenyl)benzotriazole, 2-(2'-hydroxy-5'-tert-octylphenyl)benzotriazole, 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)benzotriazole, 2-(2'-hydroxy-3',5'-di-tert-amylphenyl)benzotriazole, 2-(2'-hydroxy-3'-dodecyl-5'-methylphenyl)benzotriazole, and 2-(2'-hydroxy-3',5'-bis(α,α'-dimethylbenzyl)phenylbenzotriazo 2-[2'-hydroxy-3'-(3",4",5",6"-tetraphthalimidomethyl)-5'-methylphenyl]benzotriazole, 2-(2'-hydroxy-3'-tert-butyl-5'-methylphenyl)-5-chlorobenzotriazole, 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazole, 2,2'methylenebis[4-(1,1,3,3-tetramethylbutyl)-6-(2H-benzotriazol-2-yl)phenol], methyl-3-[3-tert-butyl-5-(2H-benzotriazol-2-yl)-4-hydroxyphenylpropionate-polyethylene glycol condensate, and the like.

[0104] Specific examples of hydroxyphenyltriazine-based ultraviolet absorbers include 2-(4,6-diphenyl-1,3,5-triazin-2-yl)-5-hexyloxy-phenol, 2-(4,6-bis-(2,4-dimethylphenyl-1,3,5-triazin-2-yl)-5-hexyloxy-phenol, and the like.

[0105] As the light stabilizer, a hindered amine light stabilizer can be used, and specific examples thereof include bis(2,2,6,6-tetramethyl-4-piperidyl)sebacate, bis(1,2,2,6,6-pentamethyl-4-piperidyl)sebacate, bis(1,2,2,6,6-pentamethyl-4-piperidyl)-2-(3,5-di-tert-butyl-4-hydroxybenzyl)-2n-butylmalonate, a condensate of 1,2,3,4-butanetetracarboxylic acid, 2,2,6,6-tetramethyl-4-piperidinol, and tridecyl alcohol, and 1, Condensation products of 2,3,4-butanetetracarboxylic acid, 1,2,2,6,6-pentamethyl-4-piperidinol and tridecyl alcohol, tetrakis(2,2,6,6-tetramethyl-4-piperidyl)-1,2,3,4-butanetetracarboxylate, tetrakis(1,2,2,6,6-pentamethyl-4-piperidyl)-1,2,3,4-butanetetracarboxylate, poly{[6-(1,1,3,3-tetramethylbutyl)amino-1,3,5-triazine-2,4-diyl][(2,2,6,6-tetramethylpiperidyl)imino]he hexamethylene[(2,2,6,6-tetramethylpiperidyl)imino]}, poly{[6-morpholino-s-triazine-2,4-diyl][(2,2,6,6-tetramethylpiperidyl)imino]hexamethylene[(2,2,6,6-tetramethylpiperidyl)imino]}, condensation product of 1,2,3,4-butanetetracarboxylic acid, 2,2,6,6-tetramethyl-4-piperidinol, and β,β,β',β'-tetramethyl-3,9-(2,4,8,10-tetraoxaspiro[5,5]undecane)diethanol, N,N'-bis(3-amino condensation product of 1,2,3,4-butanetetracarboxylic acid, 1,2,2,6,6-pentamethyl-4-piperidinol, and β,β,β',β'-tetramethyl-3,9-(2,4,8,10-tetraoxaspiro[5,5]undecane)diethanol; and polymethylpropyl 3-oxy-[4-(2,2,6,6-tetramethyl)piperidinyl]siloxane.

[0106] When an ultraviolet absorber and a light stabilizer are used, the amount of each is preferably 0.01 to 5 parts by weight, and more preferably 0.02 to 1 part by weight, per 100 parts by weight of component (A).

[0107] Furthermore, the flame-retardant aromatic polycarbonate resin composition of the present invention can be blended with a bluing agent to counteract the yellow coloring resulting from the ultraviolet absorber, etc. As the bluing agent, any agent that is used for polycarbonate resins can be used without any particular problems, but anthraquinone dyes are preferred because they are easily available.

[0108] The method for producing the flame-retardant aromatic polycarbonate resin composition of the present invention is not particularly limited, and any method can be employed. For example, components (A) to (C) and, if necessary, other components are thoroughly mixed using a premixing means such as a hand mixer, a V-type blender, a Henschel mixer, a mechanochemical device, or an extrusion mixer, followed by granulation using an extrusion granulator or a briquetting machine, followed by melt-kneading using a melt kneader such as a vented twin-screw extruder, and pelletizing using equipment such as a pelletizer.

[0109] Other methods include feeding components (A) to (C) and, if necessary, other components independently to a melt kneader, such as a vented twin-screw extruder; premixing two or more of components (A) to (C) and then feeding the premixed components to a melt kneader independently; diluting component (B) with an organic solvent and then feeding the premixed mixture to a melt kneader; and premixing a mixture of component (B) diluted with an organic solvent with other components and then feeding the premixed mixture to a melt kneader. When some of the components to be blended are liquid, a liquid injection device or a liquid addition device can be used to feed the components to the melt kneader. The heating temperature during kneading is not particularly limited, but a temperature of 200 to 350°C is preferred.

[0110] [2] Molding method and molded articles Various molded articles can be produced by injection molding the flame-retardant aromatic polycarbonate resin composition of the present invention. Injection molding can be carried out not only by a conventional cold runner molding method, but also by a hot runner, which allows for runnerless production. Furthermore, injection molding methods that can be used include gas-assisted injection molding, injection compression molding, and ultra-high speed injection molding.

[0111] The flame-retardant aromatic polycarbonate resin composition of the present invention can also be extrusion molded to be used in the form of various profile extrusion molded products, sheets, films, etc. For molding sheets and films, inflation methods, casting methods, etc. can also be used.

[0112] Furthermore, the transparent flame-retardant aromatic polycarbonate resin composition of the present invention can be molded into a heat-shrinkable tube by stretching, or into a molded article by rotational molding. The heating temperature during molding is not particularly limited, but injection molding is preferably performed at a mold temperature of 60°C or higher, particularly 80 to 120°C. In this case, the resin temperature during injection molding is preferably, for example, 250 to 360°C, and more preferably 280 to 330°C.

[0113] The present invention will be explained in more detail below by showing synthetic examples, comparative synthetic examples, examples, and comparative examples, but the present invention is not limited to these examples. The physical properties of the organohydrogenpolysiloxanes in the synthetic examples and comparative synthetic examples were measured by the following methods.

[0114] (1) Weight average molecular weight (Mw) Measured by gel permeation chromatography (GPC) using standard polystyrene as the standard. <GPC measurement conditions> Apparatus: HLC-8320GPC manufactured by Tosoh Corporation Column: TSKgel G4000HXL + G3000 HXL + G2000HXL + G2000HXL manufactured by Tosoh Corporation (inner diameter: 6 mm, length: 150 mm) Developing solution: Tetrahydrofuran Column bath temperature: 40°C Flow rate: 1 mL / min Detector: Refractive index (RI) Standard: Monodisperse polystyrene (2) Volatile content Calculated as the mass loss (% by mass) when heated at 150°C for 30 minutes at 1 atmosphere. (3) Chloride ions (Cl - ) and sulfate ions (SO4 2- ) Amount: 20 g of the obtained organohydrogenpolysiloxane was dissolved in 20 mL of toluene, 20 g of pure water was added, and the mixture was shaken for 2 hours to extract the ions into the aqueous layer. The chloride ions and sulfate ions in the aqueous layer were measured by ion chromatography. (4) Amount of Hydrogen Gas Evolved: 2 g of organohydrogenpolysiloxane was diluted with 5 mL of 1-butanol at 25°C, and 10 mL of a 20% by mass aqueous solution of sodium hydroxide was added and stirred. The amount of hydrogen gas evolved was quantified using a gas burette, and the amount of hydrogen gas evolved was calculated using the following formula: Amount of hydrogen gas evolved (mL / g) = [amount of hydrogen gas quantified using a gas burette (mL)] / [amount of sample (g)] (5) Average Constituent Unit Ratio 29 The peak area attributable to each unit in the Si-NMR spectrum was calculated assuming that the total peak area of ​​the siloxane units is 1.

[0115] [1] Synthesis of Organohydrogenpolysiloxane [Synthesis Example 1] In a 1 L flask equipped with a stirrer, a cooler, and a thermometer, 75.6 g of hexamethyldisiloxane, 62.9 g of 1,3,5,7-tetramethylcyclotetrasiloxane, 38.5 g of octamethylcyclotetrasiloxane, and 394.0 g of diphenyldimethoxysilane were stirred while 25.0 g of p-toluenesulfonic acid was added. After cooling to an internal temperature of 10°C, 31.5 g of water was added, and the mixture was stirred for 5 hours to carry out an equilibration reaction. Thereafter, the toluene layer was repeatedly washed with water until it became neutral, and the resulting toluene solution was concentrated under reduced pressure to obtain organohydrogenpolysiloxane B-1 as a colorless, transparent liquid. Organohydrogenpolysiloxane B-1 had a molecular weight of 910, a volatile content of 1.4 mass%, chloride ion and sulfate ion amounts of each of which were 1 mass ppm or less, and a hydrogen gas generation rate of 51.0 mL / g. The average structural unit ratio was [(R 11 O)(CH)SiO 1 / 2 ] 0.010 [(CH3)3SiO 1 / 2 ] 0.231 [H(CH)SiO 2 / 2 ] 0.332 [(C6H5)2SiO 2 / 2 ] 0.305 [(CH)SiO 2 / 2 ] 0.122 (R 11 : methyl group or hydrogen atom).

[0116] Synthesis Example 2 In a 1 L flask equipped with a stirrer, a cooler, and a thermometer, 154.6 g of water, 3.6 g of toluene, and 2.2 g of hexane were stirred at an internal temperature of 80° C. while a mixture of 94.4 g of phenyltrichlorosilane, 55.6 g of diphenyldichlorosilane, and 5.5 g of dimethyldichlorosilane was added dropwise using a dropping funnel over 2 hours, followed by the addition of 23.2 g of toluene and the dropwise addition of 20.1 g of dimethylchlorosilane, followed by the addition of 38.0 g of hot water at 70° C. and stirring for 1 hour at 70° C. After completion of the reaction, 111.0 g of toluene was added, and the toluene layer was washed with water until neutral. The resulting toluene solution was concentrated under reduced pressure, and the resulting white solid was powdered in a mill mixer to obtain organohydrogenpolysiloxane B-2. Organohydrogenpolysiloxane B-2 had a Mw of 8,000, a volatile content of 0.3 mass%, chloride ion and sulfate ion amounts of each of which were 1 mass ppm or less, and a hydrogen gas generation rate of 32.7 mL / g. The average constitutional unit ratio was [(R 11 O)(CH)SiO 1 / 2 ] 0.023 [H(CH)SiO 1 / 2 ] 0.184 [(C6H5)2SiO 2 / 2 ] 0.246 [(CH)SiO 2 / 2 ] 0.047 [C6H5SiO 3 / 2 ] 0.500 (R 11 : methyl group or hydrogen atom).

[0117] Comparative Synthesis Example 1: A colorless, transparent liquid organohydrogenpolysiloxane BR-1 was obtained by carrying out the same procedure as in Synthesis Example 1, except that p-toluenesulfonic acid was replaced with 15 g of sulfuric acid. Organohydrogenpolysiloxane BR-1 had a Mw of 890, a volatile content of 1.9 mass%, chloride ion and sulfate ion amounts each of which were 1 mass ppm or less, a hydrogen gas generation rate of 49.0 mL / g, and an average structural unit ratio of [(CH)SiO 1 / 2 ] 0.255 [H(CH)SiO 2 / 2 ] 0.329 [(C6H5)2SiO 2 / 2 ] 0.279[(CH)SiO 2 / 2 ] 0.137 It was.

[0118] Comparative Synthesis Example 2 A white powder organopolysiloxane BR-2 was obtained by carrying out the same procedure as in Synthesis Example 2, except that 21.5 g of trimethylchlorosilane was used instead of dimethylchlorosilane. Organopolysiloxane BR-2 had a Mw of 6,800, a volatile content of 0.5 mass%, chloride ion and sulfate ion amounts of each of which were 1 ppm or less, a hydrogen gas generation rate of 0 mL / g, and an average structural unit ratio of [(CH)SiO 1 / 2 ] 0.230 [(C6H5)2SiO 2 / 2 ] 0.262 [(CH)SiO 2 / 2 ] 0.062 [C6H5SiO 3 / 2 ] 0.446 It was.

[0119] Comparative Synthesis Example 3 The same procedure as in Synthesis Example 2 was carried out, except that the amount of water was changed to 188.9 g and the amount of dimethylchlorosilane was changed to 11.6 g, to obtain organohydrogenpolysiloxane BR-3 as a white powder. Organohydrogenpolysiloxane BR-3 had a Mw of 11,500, a volatile content of 0.2 mass%, chloride ion and sulfate ion amounts of each of which were 1 ppm or less, a hydrogen gas generation rate of 30.8 mL / g, and an average constitutional unit ratio of [(R 11 O)(CH)SiO 1 / 2 ] 0.013 [H(CH)SiO 1 / 2 ] 0.102 [(C6H5)2SiO 2 / 2 ] 0.314 [(CH)SiO 2 / 2 ] 0.109 [C6H5SiO 3 / 2 ] 0.462 (R 11 : methyl group or hydrogen atom).

[0120] [2] Production of Polycarbonate Resin Compositions [Examples 1 to 7 and Comparative Examples 1 to 6] The following components were mixed to prepare resin compositions. Specifically, component (A) was pre-dried at 120°C for 10 hours using a hot air circulation dryer. Next, components A-1 to A-6 were weighed out in the composition ratios (parts by mass) shown in Tables 2 and 3 and supplied to the first hopper. Furthermore, a mixture of component A-7, component (B), component (C), and component (D) mixed in a mixer was supplied to the second hopper. The components in each hopper were fed from a gravimetric weighing single-screw feeder (KS60 manufactured by K-Tron Corporation), and resin compositions were prepared using a co-rotating twin-screw extruder (OMega30H manufactured by STEER). Strands were extruded at a barrel temperature of 280°C, cooled in a water bath, and then strand-cut using a pelletizer to form pellets. The extrusion conditions were as follows: Discharge rate: 20 kg / h, screw rotation speed: 150 rpm, resin temperature: 308°C, torque: 150 to 180 N·m, resin pressure: 2.1 to 2.5 MPa

[0121] The resulting pellets were dried in a hot air circulation dryer at 120°C for 6 hours and then molded into a 2 mm thick molded product using an electric injection molding machine (J100ADS-110 manufactured by The Japan Steel Works, Ltd.) at a cylinder temperature of 280-300°C and a mold temperature of 83°C. The injection conditions were as follows: filling speed: 30 mm / s, injection pressure: 155-165 MPa, injection time: 0.7 seconds, dwell pressure: 140 MPa, dwell pressure speed: 30 mm / s, injection dwell time: 3 seconds, dwell time: 2.3 seconds, mold clamping force: 1000 kN.

[0122] (A) Component A-1: ​​Branched polycarbonate resin (Novarex M-7027U pellets, MVR 2.9 cm, manufactured by Mitsubishi Engineering Plastics Corporation) 3 / 10 min) A-2: Branched polycarbonate resin (Novarex M-7025U pellets, MVR 8 cm, manufactured by Mitsubishi Engineering Plastics Corporation) 3 / 10 min) A-3: High molecular weight polycarbonate resin (Teijin Ltd. Panlite K-1300Y pellets, MVR 2.8 cm 3 / 10 min) A-4: High molecular weight polycarbonate resin (Toughlon IR-2500 pellets, MVR 8 cm, manufactured by Idemitsu Kosan Co., Ltd.) 3 / 10 min) A-5: Standard polycarbonate resin (Iupilon S-3000N pellets, MVR 14 cm, manufactured by Mitsubishi Engineering Plastics Corporation) 3 / 10 min) A-6: Bisphenol A polycarbonate resin pellets (MVR 14 cm) derived from recycled water bottles 3 / 10 min) A-7: Standard polycarbonate resin (Idemitsu Kosan Co., Ltd., Toughlon FN-2200 flakes, MVR 12 cm 3 / 10 minutes)

[0123] Component (B) B-1: Organohydrogenpolysiloxane obtained in Synthesis Example 1 B-2: Organohydrogenpolysiloxane obtained in Synthesis Example 2 BR-1: Organohydrogenpolysiloxane obtained in Comparative Synthesis Example 1 BR-2: Organopolysiloxane obtained in Comparative Synthesis Example 2 BR-3: Organohydrogenpolysiloxane obtained in Comparative Synthesis Example 3

[0124] Component (C) C-1: Potassium diphenylsulfone sulfonate (KSS-FR manufactured by Arichem) C-2: Sodium polystyrene sulfonate (VERSA-TL502 manufactured by Nouryon)

[0125] Component (D) (Other Components) D-1: Phosphate-based antioxidant (ADEKA STAB PEP-36, manufactured by ADEKA Corporation) D-2: Phenol-based antioxidant (ADEKA STAB AO-50, manufactured by ADEKA Corporation) D-3: Special fatty acid ester-based mold release agent (Rikestar EW-440, manufactured by Riken Vitamin Co., Ltd.)

[0126] [3] Evaluation of Molded Product Properties The following property evaluations were performed on the resulting 2-mm-thick molded products. The results are shown in Tables 2 and 3. (6) Transparency (Haze): The transparency of the molded products was measured for haze value in accordance with JIS K7105. (7) UL Standard 94 Vertical Flame Test: The UL Standard 94 vertical flame test was performed using rectangular molded products measuring 127 mm in length, 13 mm in width, and 2 mm in thickness, prepared according to the US UL standard. Specifically, the test specimen was held vertically and a burner flame was applied to the bottom edge for 10 seconds. The flame retardancy was evaluated based on the flaming time and dripping (cotton ignition due to dripping) according to the criteria shown in Table 1. Here, the flaming time refers to the length of time the test specimen continues to burn with a flame after the ignition source is removed. Drip-induced cotton ignition was determined by whether or not a cotton tag located approximately 300 mm below the bottom edge of the test specimen was ignited by dripping material from the test specimen. Five test pieces were used for each molding material, and the flaming combustion time was evaluated as the total time for the five pieces. Regarding cotton ignition due to dripping, if no ignition was observed in any of the five pieces, it was evaluated as "no ignition."

[0127]

[0128]

[0129]

[0130] As shown in Table 2, the flame-retardant aromatic polycarbonate resin compositions of Examples 1 to 7 are excellent in flame retardancy. On the other hand, as shown in Table 3, in Comparative Example 1, which does not contain component (B), and Comparative Example 2, which does not contain component (C), cotton ignition due to dripping occurred. In addition, in Comparative Example 1, which does not contain component (B), and Comparative Example 2, which does not contain component (C), cotton ignition due to dripping occurred. 1 O) (R 2 ) SiO 1 / 2 In Comparative Examples 3 and 4, in which the composition was changed to BR-1 and BR-2, which did not contain the above, cotton ignition due to dripping occurred. 3In Comparative Example 5, which used only an aromatic polycarbonate resin, ignition of cotton due to dripping was observed, with a flame retardancy of more than 10 minutes. In Comparative Example 6, in which component (B) was changed to an organohydrogenpolysiloxane with a weight-average molecular weight of more than 10,000, ignition of cotton due to dripping did not occur, but the flaming combustion time was long, resulting in poor flame retardancy.

[0131] As is clear from the above, the flame-retardant aromatic polycarbonate resin composition of the present invention has good drip prevention performance and excellent transparency by containing at least one flame retardant selected from organopolysiloxane, organic alkali metal salt, and organic alkaline earth metal salt. The flame-retardant aromatic polycarbonate resin composition of the present invention has the advantage of being substantially free of fluorinated organic compounds. In addition, the resin composition of the present invention also has high thermal stability even when melted at high temperatures, such as during injection molding. Therefore, the composition is extremely useful not only for lighting covers and protective covers for transmission displays, but also for various industrial applications such as office automation equipment and electrical and electronic equipment, and the industrial effects it provides are extremely significant.

Claims

1. A flame-retardant aromatic polycarbonate resin composition comprising: (A) 100 parts by mass of an aromatic polycarbonate resin; (B) 0.1 to 10 parts by mass of an organohydrogenpolysiloxane having a weight average molecular weight of 700 to 10,000 and represented by the following formula (1); and (C) 0.001 to 1.0 parts by mass of at least one selected from a fluorine-free organic alkali metal salt and a fluorine-free organic alkaline earth metal salt, wherein the melt volume flow rate (MVR) measured in accordance with ISO 1133-1 at 300°C under a load of 1.2 kg is 2 to 8 cm. 3 A flame-retardant aromatic polycarbonate resin composition containing 20 mass% or more of an aromatic polycarbonate resin having a flame retardancy of 10 minutes or less based on the total mass of the component (A). 1 O) (R 2 ) 2SiO 1 / 2 ] a [(R 3 ) 3SiO 1 / 2 ] b [(H)(R 4 ) SiO 2 / 2 ] c [(Ar) x (R 5 ) 2-x SiO 2 / 2 ] d [(R 6 ) 2SiO 2 / 2 ] e [(R 7 ) SiO 3 / 2 ] f (1) (wherein, R 1 is a hydrogen atom or an alkyl group having 1 to 3 carbon atoms; R 2 and R 3 are each independently a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or an aryl group having 6 to 12 carbon atoms; R 4 is an alkyl group having 1 to 6 carbon atoms or an aryl group having 6 to 12 carbon atoms, each Ar is independently an aryl group having 6 to 12 carbon atoms, R 5 and R 6 are each independently an alkyl group having 1 to 6 carbon atoms; R 7 are each independently an alkenyl group having 2 to 8 carbon atoms, an aryl group having 6 to 12 carbon atoms, or an alkyl group having 1 to 8 carbon atoms which may be substituted with an epoxy group, an amino group, an acryloyl group, a methacryloyl group, or a thiol group. x represents 1 or 2, a is a number that satisfies 0<a≦0.03, b is a number that satisfies 0<b≦0.30, c is a number that satisfies 0≦c≦0.45, d is a number that satisfies 0.20≦d≦0.70, e is a number that satisfies 0≦e≦0.20, f is a number that satisfies 0≦f≦0.70, and a+b+c+d+e+f is 1. However, when c is 0, R 2 and R 3 At least one of is a hydrogen atom.) 2. The flame-retardant aromatic polycarbonate resin composition according to claim 1, wherein in said formula (1), Ar is a phenyl group, x is 2, and f is 0.

3. A flame-retardant aromatic polycarbonate resin composition according to claim 1 or 2, wherein the component (C) is an alkali metal salt of a non-fluorine-containing aromatic sulfonic acid or an alkaline earth metal salt of a non-fluorine-containing aromatic sulfonic acid.

4. A molded article made from the flame-retardant aromatic polycarbonate resin composition according to any one of claims 1 to 3.

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