JP2013237799A - Flame-retardant aromatic polycarbonate resin composition and molding of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flame-retardant aromatic polycarbonate resin composition that provides a molding excellent in flame retardancy without ruining original transparency of aromatic polycarbonate resin.SOLUTION: A flame-retardant aromatic polycarbonate composition includes: (B) 0.02-0.5 parts by mass of a phenylphosphonic acid metal salt shown by general formula (I) based on (A) 100 parts by mass of an aromatic polycarbonate resin in which a viscosity average molecular weight is 15,000-40,000. In the formula, Rand Rdenote a hydrogen atom, a 1-10C alkyl group or a 1-10C alkoxycarbonyl group; Mdenotes a metal atom; and Mdenotes a metal atom identical with Mor a hydrogen atom.

Description

  The present invention relates to a flame retardant aromatic polycarbonate resin composition. Specifically, a flame-retardant aromatic polycarbonate resin composition that gives a molded article having excellent flame retardancy without impairing the original transparency of the aromatic polycarbonate resin, and molding this flame-retardant aromatic polycarbonate resin composition It relates to a molded product.

  Aromatic polycarbonate resin is excellent in transparency, impact resistance, heat resistance, etc., and the resulting molded product is also excellent in dimensional stability etc., so housings for electrical and electronic equipment, automotive parts, It is widely used as a raw material resin for the production of precision molded products such as optical disk related parts. In particular, in a case of a home appliance, an electronic device, an image display device, or the like, a product with high commercial value can be obtained by making use of its beautiful appearance.

  In recent years, there has been a strong demand for flame retarding of resin materials used mainly in applications such as electrical / electronic devices and home appliances, and many flame retardants have been developed and studied in order to meet these demands. For example, Patent Documents 1 and 2 propose blending an organic sulfonic acid metal salt such as potassium perfluorobutanesulfonate with an aromatic polycarbonate resin for the purpose of improving flame retardancy.

However, although the organic sulfonic acid metal salt is an effective flame retardant for suppressing the decrease in heat resistance and improving the flame retardancy, the aromatic polycarbonate resin composition containing the organic sulfonic acid metal salt is particularly thick. When a meat molded product is injection-molded, in the cooling process in the mold, the inside of the molded product is gradually cooled to cause white turbidity, and the resulting molded product is impaired in the original transparency of the aromatic polycarbonate resin. There was a bug.
The decrease in transparency of the molded product becomes a big problem particularly in a thick molded product, and the commercial value is remarkably reduced.

  In addition, the phenylphosphonic acid metal salt used as a flame retardant in the present invention is described, for example, in Patent Document 3 as a crystal nucleating agent for promoting crystallization of polylactic acid resin. There has been no report of use as a flame retardant.

JP-A-11-263903 JP 2011-246728 A International Publication WO2005 / 097894 Pamphlet

  The present invention solves the above-described conventional problems, and provides a flame-retardant aromatic polycarbonate resin composition that gives a molded article having excellent flame retardancy without impairing the original transparency of the aromatic polycarbonate resin, and the aromatic polycarbonate. It is an object to provide a molded product obtained by molding a resin composition.

  As a result of intensive studies to solve the above-mentioned problems, the present inventor, as a flame retardant, contains a phenylphosphonic acid metal salt having a specific structure in a predetermined ratio, thereby preventing white turbidity at the time of slow cooling, It has been found that flame retardancy can be improved without impairing the original transparency of the group polycarbonate resin.

  The present invention has been achieved based on such findings, and the gist thereof is as follows.

[1] (A) A phenylphosphonic acid metal represented by the following general formula (I) or (II) with respect to 100 parts by mass of an aromatic polycarbonate resin having a viscosity average molecular weight of 15,000 to 40,000 A flame retardant aromatic polycarbonate composition containing 0.02 to 0.5 parts by mass of a salt.

(Wherein, R ₁ and R ₂ may be the same or different, a hydrogen atom, .M ₁ represents an alkyl group, or an alkoxycarbonyl group having 1 to 10 carbon atoms having 1 to 10 carbon atoms metal atom And M ₂ represents the same metal atom or hydrogen atom as M _1. )

(In the formula, R ₃ and R ₄ may be the same or different and each represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, or an alkoxycarbonyl group having 1 to 10 carbon atoms. M ₃ is a metal atom. Represents.)

[2] The flame retardancy according to [1], wherein M ₁ in the general formula (I) is lithium, sodium, or potassium, and M ₃ in the general formula (II) is calcium, magnesium, or zinc. Aromatic polycarbonate composition.

[3] A molded product obtained by molding the flame-retardant aromatic polycarbonate composition according to [1] or [2].

  According to the present invention, flame retardancy is improved without impairing the transparency of the aromatic polycarbonate resin by blending the (A) aromatic polycarbonate resin with the (B) phenylphosphonic acid metal salt at a predetermined ratio. It is possible to provide a flame retardant aromatic polycarbonate composition excellent in the original physical properties of an aromatic polycarbonate resin such as transparency, impact resistance and heat resistance, and also excellent in flame retardancy, and a molded product thereof. it can.

  Hereinafter, the present invention will be described in detail with reference to embodiments and examples, but the present invention is not limited to the embodiments and examples described below, and may be arbitrarily selected without departing from the scope of the present invention. You can change it to

[Overview]
The flame-retardant aromatic polycarbonate resin composition of the present invention comprises at least a specific ratio of (A) an aromatic polycarbonate resin and (B) a phenylphosphonic acid metal salt having a characteristic structure. Moreover, the flame-retardant aromatic polycarbonate resin composition of this invention may contain the other component further as needed.

  According to the present invention, by blending the (A) aromatic polycarbonate resin with the (B) specific structure of the phenylphosphonic acid metal salt in a predetermined ratio, without impairing the transparency of the (A) aromatic polycarbonate resin, Flame retardancy can be improved.

[Aromatic polycarbonate resin (A)]
The aromatic polycarbonate resin (A) used in the present invention (hereinafter sometimes referred to as “component (A)”) reacts an aromatic dihydroxy compound or a small amount thereof with phosgene or a carbonic acid diester. It is the thermoplastic polymer or copolymer which may be branched and is obtained by making it. The production method of the aromatic polycarbonate resin is not particularly limited, and those produced by a conventionally known phosgene method (interfacial polymerization method) or melting method (transesterification method) can be used. Moreover, when the melting method is used, an aromatic polycarbonate resin in which the amount of OH groups in the terminal groups is adjusted can be used.

  As the raw material aromatic dihydroxy compound, 2,2-bis (4-hydroxyphenyl) propane (= bisphenol A), tetramethylbisphenol A, bis (4-hydroxyphenyl) -p-diisopropylbenzene, hydroquinone, resorcinol, 4 , 4-dihydroxydiphenyl and the like, preferably bisphenol A. In addition, a compound in which one or more tetraalkylphosphonium sulfonates are bonded to the above aromatic dihydroxy compound can also be used.

  In order to obtain a branched aromatic polycarbonate resin, a part of the above-mentioned aromatic dihydroxy compound is mixed with the following branching agents, that is, phloroglucin, 4,6-dimethyl-2,4,6-tri (4-hydroxyphenyl). Heptene-2,4,6-dimethyl-2,4,6-tri (4-hydroxyphenyl) heptane, 2,6-dimethyl-2,4,6-tri (4-hydroxyphenylheptene-3,1, Polyhydroxy compounds such as 3,5-tri (4-hydroxyphenyl) benzene and 1,1,1-tri (4-hydroxyphenyl) ethane, and 3,3-bis (4-hydroxyaryl) oxindole (= isa) Tin bisphenol), 5-chloruisatin, 5,7-dichloroisatin, 5-bromoisatin, etc. Dose, the aromatic dihydroxy compound is usually 0.01 to 10 mol%, preferably 0.1 to 2 mol%.

  As aromatic polycarbonate resin (A), among the above-mentioned, polycarbonate resin derived from 2,2-bis (4-hydroxyphenyl) propane, or 2,2-bis (4-hydroxyphenyl) propane and other Polycarbonate copolymers derived from aromatic dihydroxy compounds are preferred. Further, it may be a copolymer mainly composed of a polycarbonate resin, such as a copolymer with a polymer or oligomer having a siloxane structure.

  The aromatic polycarbonate resin mentioned above may be used individually by 1 type, and 2 or more types may be mixed and used for it.

  In order to adjust the molecular weight of the aromatic polycarbonate resin, a monovalent aromatic hydroxy compound may be used. Examples of the monovalent aromatic hydroxy compound include m- and p-methylphenol, m- and p-. And propylphenol, p-tert-butylphenol, p-long chain alkyl-substituted phenol and the like.

The molecular weight of the aromatic polycarbonate resin (A) used in the present invention is arbitrary depending on the use and may be appropriately selected and determined. From the viewpoint of moldability, strength, etc., the molecular weight of the aromatic polycarbonate resin (A) is determined by viscosity. The average molecular weight [Mv] is 15,000 to 40,000, preferably 15,000 to 30,000. As described above, when the viscosity average molecular weight is 15,000 or more, the mechanical strength tends to be further improved, which is more preferable in the case of use in applications requiring high mechanical strength. On the other hand, when the viscosity average molecular weight is 40,000 or less, a decrease in fluidity tends to be suppressed and improved, which is more preferable from the viewpoint of easy molding processability. The viscosity average molecular weight [Mv] here is the viscosity average molecular weight [Mv] converted from the solution viscosity, using methylene chloride as a solvent, and using an Ubbelohde viscometer, the intrinsic viscosity [η] (unit dl / g) is obtained and means a value (viscosity average molecular weight: Mv) calculated from Schnell's viscosity formula, that is, η = 1.23 × 10 ⁻⁴ M ^0.83 . Here, the intrinsic viscosity [η] is a value calculated from the following equation by measuring the specific viscosity [η _sp ] at each solution concentration [C] (g / dl).

  The viscosity average molecular weight of the aromatic polycarbonate resin (A) is preferably 17,000 to 30,000, particularly preferably 19,000 to 27,000. Two or more types of aromatic polycarbonate resins having different viscosity average molecular weights may be mixed. In this case, an aromatic polycarbonate resin having a viscosity average molecular weight outside the above-mentioned preferred range may be mixed. In this case, the viscosity average molecular weight of the mixture is preferably within the above range.

[(B) phenylphosphonic acid metal salt]
In the present invention, a phenylphosphonic acid metal salt represented by the following general formula (I) or (II) is used as a flame retardant.

（式中、Ｒ₁及びＲ_２は、同一でも相異なっていてもよく、水素原子、炭素数１〜１０のアルキル基、又は炭素数１〜１０のアルコキシカルボニル基を表す。Ｍ_１は金属原子であり、Ｍ_２はＭ_１と同一の金属原子又は水素原子を表す。）

（式中、Ｒ_３及びＲ_４は、同一でも相異なっていてもよく、水素原子、炭素数１〜１０のアルキル基、又は炭素数１〜１０のアルコキシカルボニル基を表す。Ｍ_３は金属原子を表す。）

(Wherein, R ₁ and R ₂ may be the same or different, a hydrogen atom, .M ₁ represents an alkyl group, or an alkoxycarbonyl group having 1 to 10 carbon atoms having 1 to 10 carbon atoms metal atom And M ₂ represents the same metal atom or hydrogen atom as M _1. )

(In the formula, R ₃ and R ₄ may be the same or different and each represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, or an alkoxycarbonyl group having 1 to 10 carbon atoms. M ₃ is a metal atom. Represents.)

In the general formulas (I) and (II), the formulas R ₁ and R ₂ , R ₃ and R ₄ are a hydrogen atom, a methyl group, an ethyl group, an n-propyl group, an i-propyl group, an n-butyl group, C1-C10 alkyl groups, such as i-butyl group and t-butyl group, C1-C10 alkoxycarbonyl groups, such as a methoxycarbonyl group and an ethoxycarbonyl group, are mentioned. R ₁ and R ₂ may be the same or different. R ₃ and R ₄ may be the same or different.

  (B) Specific examples of phenylphosphonic acid of phenylphosphonic acid metal salt include phenylphosphonic acid, 4-methylphenylphosphonic acid, 4-ethylphenylphosphonic acid, 4-n-propylphenylphosphonic acid, 4-i-propyl. Phenylphosphonic acid, 4-n-butylphenylphosphonic acid, 4-i-butylphenylphosphonic acid, 4-t-butylphenylphosphonic acid, 3,5-dimethoxycarbonylphenylphosphonic acid, 3,5-diethoxycarbonylphenylphosphone Examples thereof include acid, 2,5-dimethoxycarbonylphenylphosphonic acid, 2,5-diethoxycarbonylphenylphosphonic acid, and the like.

In the general formula (I), examples of M ₁ include monovalent alkali metal atoms such as lithium, sodium, potassium, and cesium. M ₂ is the same metal atom or hydrogen atom as M ₁ . That is, the phenylphosphonic acid metal salt represented by the general formula (I) may be a phenylphosphonic acid monohydrogen monometallic salt, a phenylphosphonic acid dimetal salt, or a mixture thereof. Also good.

  The ratio of each metal salt in the case of phenylphosphonic acid monohydrogen monometallic salt, bimetallic salt, or a mixture thereof can be confirmed by the pH of the aqueous solution of phenylphosphonic acid metal salt. As shown in Example 1 described later, when a 1% by weight aqueous solution was prepared, the one having an acidic pH was phenylphosphonic acid monohydrogen monometal salt or phenylphosphonic acid monohydrogen monometal salt. A mixture of phenylphosphonic acid dimetal salts having a neutral pH is phenylphosphonic acid dimetal salts. From the viewpoint of thermal stability of the polycarbonate resin composition, phenylphosphonic acid monohydrogen monometal salt is preferable, and from the viewpoint of char formation (flame retardancy), phenylphosphonic acid dimetal salt is preferable.

In the general formula (II), examples of M ₃ include alkaline earth metal atoms such as calcium and magnesium, and divalent transition metal atoms such as zinc.

  These (B) phenylphosphonic acid metal salts may be used alone or in a combination of two or more. That is, one or more of the phenylphosphonic acid metal salts represented by the general formula (I) may be used, and one or more of the phenylphosphonic acid metal salts represented by the general formula (II). And one or more of the phenylphosphonic acid metal salts represented by the general formula (I) and one or more of the phenylphosphonic acid metal salts represented by the general formula (II) May be used in combination.

  In the flame-retardant aromatic polycarbonate resin composition of the present invention, the (B) phenylphosphonic acid metal salt is preferably 0.02 to 0.5 parts by mass, preferably 100 parts by mass of the (A) aromatic polycarbonate resin. Contains 0.05 to 0.2 parts by mass, more preferably 0.08 to 0.15 parts by mass. If the content of the (B) phenylphosphonic acid metal salt in the flame retardant aromatic polycarbonate resin composition is too small, the effect of improving flame retardancy due to the blending thereof cannot be obtained sufficiently, and is too much. And inferior in transparency.

[Other additives]
In addition to (A) the aromatic polycarbonate resin and (B) the phenylphosphonic acid metal salt, the flame retardant aromatic polycarbonate resin composition of the present invention is within the range not impairing the effects of the present invention. An additive may be contained. Examples of such other components and additives include phosphorus heat stabilizers, antioxidants, mold release agents, ultraviolet absorbers, dyes and pigments, antistatic agents, and other resin components.

<Phosphorus heat stabilizer>
The flame retardant aromatic polycarbonate resin composition of the present invention can contain a phosphorus heat stabilizer. Phosphorus heat stabilizers are generally effective in improving the residence stability at high temperatures and the heat resistance stability when using resin molded products when melt-kneading resin components.

  Examples of the phosphorus-based heat stabilizer used in the present invention include phosphorous acid, phosphoric acid, phosphorous acid ester, phosphoric acid ester, etc. Among them, trivalent phosphorus is included, and it is easy to express a discoloration suppressing effect. Phosphites such as phosphites and phosphonites are preferred.

  Examples of the phosphite include triphenyl phosphite, tris (nonylphenyl) phosphite, dilauryl hydrogen phosphite, triethyl phosphite, tridecyl phosphite, tris (2-ethylhexyl) phosphite, tris (tridecyl) phosphite. Phyto, tristearyl phosphite, diphenyl monodecyl phosphite, monophenyl didecyl phosphite, diphenyl mono (tridecyl) phosphite, tetraphenyldipropylene glycol diphosphite, tetraphenyltetra (tridecyl) pentaerythritol tetraphosphite, water Bisphenol A phenol phosphite polymer, diphenyl hydrogen phosphite, 4,4′-butylidene-bis (3-methyl-6-tert-butyl) Ruphenyldi (tridecyl) phosphite) tetra (tridecyl) 4,4'-isopropylidenediphenyldiphosphite, bis (tridecyl) pentaerythritol diphosphite, bis (nonylphenyl) pentaerythritol diphosphite, dilaurylpentaerythritol diphos Phyto, distearyl pentaerythritol diphosphite, tris (4-tert-butylphenyl) phosphite, tris (2,4-di-tert-butylphenyl) phosphite, hydrogenated bisphenol A pentaerythritol phosphite polymer, bis ( 2,4-di-tert-butylphenyl) pentaerythritol diphosphite, bis (2,6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphite, , 2'-methylenebis (4,6-di -tert- butylphenyl) octyl phosphite, bis (2,4-dicumylphenyl) pentaerythritol diphosphite and the like.

  Examples of phosphonites include tetrakis (2,4-di-iso-propylphenyl) -4,4′-biphenylenediphosphonite, tetrakis (2,4-di-n-butylphenyl) -4,4′-biphenyl. Range phosphonite, tetrakis (2,4-di-tert-butylphenyl) -4,4'-biphenylene diphosphonite, tetrakis (2,4-di-tert-butylphenyl) -4,3'-biphenylene diphospho Knight, tetrakis (2,4-di-tert-butylphenyl) -3,3'-biphenylenediphosphonite, tetrakis (2,6-di-iso-propylphenyl) -4,4'-biphenylenediphosphonite, Tetrakis (2,6-di-n-butylphenyl) -4,4′-biphenylenediphosphonite, tetrakis (2,6- -Tert-butylphenyl) -4,4'-biphenylenediphosphonite, tetrakis (2,6-di-tert-butylphenyl) -4,3'-biphenylenediphosphonite, tetrakis (2,6-di-tert) -Butylphenyl) -3,3'-biphenylenediphosphonite and the like.

  Examples of the acid phosphate include methyl acid phosphate, ethyl acid phosphate, propyl acid phosphate, isopropyl acid phosphate, butyl acid phosphate, butoxyethyl acid phosphate, octyl acid phosphate, 2-ethylhexyl acid phosphate, decyl acid phosphate, and lauryl phosphate. Phosphate, stearyl acid phosphate, oleyl acid phosphate, behenyl acid phosphate, phenyl acid phosphate, nonyl phenyl acid phosphate, cyclohexyl acid phosphate, phenoxyethyl acid phosphate, alkoxy polyethylene glycol acid phosphate, bisphenol A acid Sulfate, dimethyl acid phosphate, diethyl acid phosphate, dipropyl acid phosphate, diisopropyl acid phosphate, dibutyl acid phosphate, dioctyl acid phosphate, di-2-ethylhexyl acid phosphate, dioctyl acid phosphate, dilauryl acid phosphate, distearyl acid phenyl Acid phosphate, bisnonylphenyl acid phosphate, etc. are mentioned.

  Among the phosphites, distearyl pentaerythritol diphosphite, tris (2,4-di-tert-butylphenyl) phosphite, bis (2,6-di-tert-butyl-4-methylphenyl) penta Erythritol diphosphite, 2,2′-methylenebis (4,6-di-tert-butylphenyl) octyl phosphite, bis (2,4-dicumylphenyl) pentaerythritol diphosphite are preferable, and heat resistance is good. Tris (2,4-di-tert-butylphenyl) phosphite is particularly preferred in that it is difficult to hydrolyze.

  These phosphorus heat stabilizers may be used alone or in combination of two or more.

  When the flame-retardant aromatic polycarbonate resin composition of the present invention contains a phosphorus-based heat stabilizer, the content thereof is usually 0.001 part by mass or more, preferably 100 parts by mass of (A) aromatic polycarbonate resin. Is 0.003 parts by mass or more, more preferably 0.005 parts by mass or more, and usually 0.1 parts by mass or less, preferably 0.08 parts by mass or less, more preferably 0.06 parts by mass or less. If the content of the phosphorus-based heat stabilizer is less than the lower limit of the above range, the thermal stability effect may be insufficient, and if the content of the phosphorus-based heat stabilizer exceeds the upper limit of the above range , There is a possibility that the effect will reach its peak and become less economical.

<Antioxidant>
The flame retardant aromatic polycarbonate resin composition of the present invention preferably contains an antioxidant as desired. By containing the antioxidant, it is possible to suppress hue deterioration and deterioration of mechanical properties during heat retention.

  Examples of the antioxidant include hindered phenol-based antioxidants. Specific examples thereof include pentaerythritol tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], octadecyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl). ) Propionate, thiodiethylenebis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], N, N′-hexane-1,6-diylbis [3- (3,5-di-) tert-butyl-4-hydroxyphenylpropionamide), 2,4-dimethyl-6- (1-methylpentadecyl) phenol, diethyl [[3,5-bis (1,1-dimethylethyl) -4-hydroxyphenyl ] Methyl] phosphoate, 3,3 ′, 3 ″, 5,5 ′, 5 ″ -hexa-tert-butyl-a, a ′, ''-(Mesitylene-2,4,6-triyl) tri-p-cresol, 4,6-bis (octylthiomethyl) -o-cresol, ethylenebis (oxyethylene) bis [3- (5-tert- Butyl-4-hydroxy-m-tolyl) propionate], hexamethylenebis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], 1,3,5-tris (3,5- Di-tert-butyl-4-hydroxybenzyl) -1,3,5-triazine-2,4,6 (1H, 3H, 5H) -trione, 2,6-di-tert-butyl-4- (4 6-bis (octylthio) -1,3,5-triazin-2-ylamino) phenol and the like.

  Among them, pentaerythritol tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], octadecyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate preferable. Examples of such commercially available phenolic antioxidants include “Irganox 1010”, “Irganox 1076” manufactured by BASF, “Adekastab AO-50”, “Adekastab AO-60” manufactured by Adeka, and the like. It is done.

  In addition, 1 type may contain antioxidant and 2 or more types may contain it by arbitrary combinations and a ratio.

  When the flame retardant aromatic polycarbonate resin composition of the present invention contains an antioxidant, the content thereof is usually 0.0001 parts by mass or more, preferably 100 parts by mass of (A) aromatic polycarbonate resin. 0.001 part by mass or more, more preferably 0.01 part by mass or more, and usually 3 parts by mass or less, preferably 1 part by mass or less, more preferably 0.5 parts by mass or less, and further preferably 0.3 parts by mass. It is below mass parts. When the content of the antioxidant is less than the lower limit of the above range, the effect as an antioxidant may be insufficient, and when the content of the antioxidant exceeds the upper limit of the above range, There is a possibility that the effect reaches its peak and is not economical.

<Release agent>
The flame-retardant aromatic polycarbonate resin composition of the present invention may contain a release agent, and a full esterified product of an aliphatic alcohol and an aliphatic carboxylic acid is suitably used as the release agent.

  Examples of the aliphatic carboxylic acid constituting the fully esterified product include saturated or unsaturated aliphatic monocarboxylic acid, dicarboxylic acid, and tricarboxylic acid. Here, the aliphatic carboxylic acid also includes an alicyclic carboxylic acid. Among these, preferable aliphatic carboxylic acids are mono- or dicarboxylic acids having 6 to 36 carbon atoms, and aliphatic saturated monocarboxylic acids having 6 to 36 carbon atoms are more preferable. Specific examples of such aliphatic carboxylic acids include palmitic acid, stearic acid, valeric acid, caproic acid, capric acid, lauric acid, arachidic acid, behenic acid, lignoceric acid, serotic acid, melicic acid, tetratriacontanoic acid. , Montanic acid, glutaric acid, adipic acid, azelaic acid and the like.

  On the other hand, examples of the aliphatic alcohol component constituting the fully esterified product include saturated or unsaturated monohydric alcohols, saturated or unsaturated polyhydric alcohols, and the like. These alcohols may have a substituent such as a fluorine atom or an aryl group. Among these alcohols, monovalent or polyvalent saturated alcohols having 30 or less carbon atoms are preferable, and aliphatic saturated monohydric alcohols or polyhydric alcohols having 30 or less carbon atoms are more preferable. Here, the aliphatic alcohol also includes an alicyclic alcohol.

  Specific examples of these alcohols include octanol, decanol, dodecanol, stearyl alcohol, behenyl alcohol, ethylene glycol, diethylene glycol, glycerin, pentaerythritol, 2,2-dihydroxyperfluoropropanol, neopentylene glycol, ditrimethylolpropane, dipentaerythritol. Etc.

  In addition, the esterification rate of the full esterified product of the aliphatic alcohol and the aliphatic carboxylic acid is not necessarily 100%, and may be 80% or more. The esterification rate of the full esterified product according to the present invention is preferably 85% or more, particularly preferably 90% or more.

  The full esterified product of an aliphatic alcohol and an aliphatic carboxylic acid used in the present invention is, in particular, one or more of a full esterified product of a monoaliphatic alcohol and a monoaliphatic carboxylic acid, and a polyhydric aliphatic alcohol. It is preferable to contain 1 type, or 2 or more types of the full esterification product of a mono-aliphatic carboxylic acid, a full esterification product of a mono-aliphatic alcohol and a mono-aliphatic carboxylic acid, Combined use with a fully esterified product with an aliphatic carboxylic acid improves the mold release effect, suppresses gas generation during melt kneading, and reduces the mold deposit.

  As a full esterified product of monoaliphatic alcohol and monoaliphatic carboxylic acid, a full esterified product of stearyl alcohol and stearic acid (stearyl stearate), a full esterified product of behenyl alcohol and behenic acid (behenyl behenate) is preferable. As a full esterified product of a polyaliphatic alcohol and a monoaliphatic carboxylic acid, a full esterified product of glycerol serine and stearic acid (glycerol tristearate), a full esterified product of pentaerythritol and stearic acid (pentaerythritol tetra) Stearylate) is preferred, and pentaerythritol tetrastearate is particularly preferred.

  The full esterified product of an aliphatic alcohol and an aliphatic carboxylic acid may contain an aliphatic carboxylic acid and / or alcohol as an impurity, or may be a mixture of a plurality of compounds.

  When the flame retardant aromatic polycarbonate resin composition of the present invention contains a release agent such as a full esterified product of an aliphatic alcohol and an aliphatic carboxylic acid, the content is (A) the aromatic polycarbonate resin 100. The amount is usually 2 parts by mass or less, preferably 1 part by mass or less with respect to parts by mass. When there is too much content of a mold release agent, there exist problems, such as a fall of hydrolysis resistance and mold contamination at the time of injection molding.

  When a full esterified product of a monoaliphatic alcohol and a monoaliphatic carboxylic acid and a full esterified product of a polyaliphatic alcohol and a monoaliphatic carboxylic acid are used in combination as a mold release agent, the use ratio (mass) Ratio) is a full esterified product of a monoaliphatic alcohol and a monoaliphatic carboxylic acid: a full esterified product of a polyaliphatic alcohol and a monoaliphatic carboxylic acid = 1: 1 to 10 in combination. It is preferable to obtain the above-mentioned effect with certainty.

<Ultraviolet absorber>
The flame retardant aromatic polycarbonate resin composition of the present invention preferably contains an ultraviolet absorber as desired. By containing the ultraviolet absorber, the weather resistance of the flame-retardant aromatic polycarbonate resin composition of the present invention can be improved.

  Examples of the ultraviolet absorber include inorganic ultraviolet absorbers such as cerium oxide and zinc oxide; organics such as benzotriazole compounds, benzophenone compounds, salicylate compounds, cyanoacrylate compounds, triazine compounds, oxanilide compounds, malonic ester compounds, hindered amine compounds, etc. Examples include ultraviolet absorbers. In these, an organic ultraviolet absorber is preferable and a benzotriazole compound is more preferable. By selecting the organic ultraviolet absorber, the mechanical properties of the flame-retardant aromatic polycarbonate resin composition of the present invention are improved.

  Specific examples of the benzotriazole compound include, for example, 2- (2′-hydroxy-5′-methylphenyl) benzotriazole, 2- [2′-hydroxy-3 ′, 5′-bis (α, α-dimethylbenzyl). ) Phenyl] -benzotriazole, 2- (2′-hydroxy-3 ′, 5′-di-tert-butyl-phenyl) -benzotriazole, 2- (2′-hydroxy-3′-tert-butyl-5 ′) -Methylphenyl) -5-chlorobenzotriazole, 2- (2'-hydroxy-3 ', 5'-di-tert-butyl-phenyl) -5-chlorobenzotriazole), 2- (2'-hydroxy-3 ', 5'-di-tert-amyl) -benzotriazole, 2- (2'-hydroxy-5'-tert-octylphenyl) benzotriazole, 2 2'-methylenebis [4- (1,1,3,3-tetramethylbutyl) -6- (2N-benzotriazol-2-yl) phenol] and the like, among others 2- (2'-hydroxy- 5′-tert-octylphenyl) benzotriazole, 2,2′-methylenebis [4- (1,1,3,3-tetramethylbutyl) -6- (2N-benzotriazol-2-yl) phenol] are preferred. In particular, 2- (2′-hydroxy-5′-tert-octylphenyl) benzotriazole is preferred. Specific examples of such a benzotriazole compound include “Seesorb 701”, “Seesorb 705”, “Seesorb 703”, “Seesorb 702”, “Seesorb 704”, and “Seesorb 709” manufactured by Sipro Kasei Co., Ltd. “Biosorb 520”, “Biosorb 582”, “Biosorb 580”, “Biosorb 583” manufactured by Yakuhin Kagaku Co., Ltd. “Chemisorb 71”, “Chemisorb 72” manufactured by Chemipro Kasei Co., Ltd. “Siasorb UV5411” manufactured by Cytec Industries, Inc. “ “LA-32”, “LA-38”, “LA-36”, “LA-34”, “LA-31”, “Tinuvin P”, “Tinubin 234”, “Tinubin 326” manufactured by Ciba Specialty Chemicals, “Tinuvin 327”, “Tinuvin 328” and the like can be mentioned.

  Specific examples of the benzophenone compound include, for example, 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid, 2-hydroxy-4-n-octoxy Benzophenone, 2-hydroxy-n-dodecyloxybenzophenone, bis (5-benzoyl-4-hydroxy-2-methoxyphenyl) methane, 2,2'-dihydroxy-4-methoxybenzophenone, 2,2'-dihydroxy-4 4,4′-dimethoxybenzophenone and the like. Specific examples of such a benzophenone compound include “Seesorb 100”, “Seesorb 101”, “Seesorb 101S”, “Seesorb 102”, and “Seesorb 102” manufactured by Cypro Kasei Co., Ltd. Seesorb 103 ", joint medicine “Biosorb 100”, “Biosorb 110”, “Biosorb 130”, manufactured by Kemipro Kasei Co., Ltd. “Chemisorb 10”, “Chemisorb 11”, “Chemisorb 11S”, “Chemisorb 12”, “Chemsorb 13”, “Chemisorb 111” BASF “Ubinur 400”, BASF “Ubinur M-40”, BASF “Ubinur MS-40”, Cytec Industries “Thiasorb UV9”, “Thiasorb UV284”, “Thiasorb UV531”, “Thiasorb” UV24 "," ADEKA STAB 1413 "," ADEKA STAB LA-51 "manufactured by Adeka Corporation and the like.

  Specific examples of the salicylate compound include phenyl salicylate and 4-tert-butylphenyl salicylate. Specific examples of such a salicylate compound include, for example, “Seesorb 201” and “Seesorb” manufactured by Sipro Kasei Co., Ltd. 202 ”,“ Kemisorb 21 ”,“ Kemisorb 22 ”manufactured by Chemipro Kasei Co., Ltd., and the like.

  Specific examples of the cyanoacrylate compound include, for example, ethyl-2-cyano-3,3-diphenyl acrylate, 2-ethylhexyl-2-cyano-3,3-diphenyl acrylate, and the like. Specifically, for example, “Seasorb 501” manufactured by Sipro Kasei Co., Ltd., “Biosorb 910” manufactured by Kyodo Yakuhin Co., Ltd., “Ubisolator 300” manufactured by Daiichi Kasei Co., Ltd., “Ubinur N-35”, “Ubinur N-N-” manufactured by BASF 539 "and the like.

  Specific examples of the oxanilide compound include, for example, 2-ethoxy-2′-ethyl oxalinic acid bis-arinide and the like. Specific examples of such an oxalinide compound include “Sanduboa” manufactured by Clariant Corporation. VSU "etc. are mentioned.

  As the malonic acid ester compound, 2- (alkylidene) malonic acid esters are preferable, and 2- (1-arylalkylidene) malonic acid esters are more preferable. Specific examples of such a malonic ester compound include “PR-25” manufactured by Clariant Japan, “B-CAP” manufactured by Ciba Specialty Chemicals, and the like.

When the flame retardant aromatic polycarbonate resin composition of the present invention contains an ultraviolet absorber, the content thereof is usually 0.001 part by mass or more, preferably 100 parts by mass of (A) aromatic polycarbonate resin, preferably 0.01 parts by mass or more, more preferably 0.1 parts by mass or more, and usually 3 parts by mass or less, preferably 1 part by mass or less, more preferably 0.5 parts by mass or less, still more preferably 0.4 parts by mass. It is below mass parts. If the content of the UV absorber is below the lower limit of the above range, the effect of improving the weather resistance may be insufficient, and if the content of the UV absorber exceeds the upper limit of the above range, the mold Debogit etc. may occur and cause mold contamination.
In addition, 1 type may contain the ultraviolet absorber and 2 or more types may contain it by arbitrary combinations and a ratio.

<Dye and pigment>
The flame retardant aromatic polycarbonate resin composition of the present invention may contain a dye / pigment if desired. In addition to improving the concealability and weather resistance of the flame-retardant aromatic polycarbonate resin composition of the present invention by containing a dye / pigment, molding obtained by molding the flame-retardant aromatic polycarbonate resin composition of the present invention The design of the product can be improved.

  Examples of the dye / pigment include inorganic pigments, organic pigments, and organic dyes.

  Examples of inorganic pigments include sulfide pigments such as carbon black, cadmium red, and cadmium yellow; silicate pigments such as ultramarine blue; titanium oxide, zinc white, petal, chromium oxide, iron black, titanium yellow, zinc- Oxide pigments such as iron brown, titanium cobalt green, cobalt green, cobalt blue, copper-chromium black and copper-iron black; chromic pigments such as chrome lead and molybdate orange; Examples include Russian pigments.

  Examples of organic pigments and organic dyes include phthalocyanine dyes such as copper phthalocyanine blue and copper phthalocyanine green; azo dyes such as nickel azo yellow; thioindigo, perinone, perylene, quinacridone, dioxazine, iso Examples thereof include condensed polycyclic dyes such as indolinone and quinophthalone; anthraquinone, heterocyclic and methyl dyes.

  Of these, titanium oxide, carbon black, cyanine-based, quinoline-based, anthraquinone-based, and phthalocyanine-based compounds are preferable from the viewpoint of thermal stability.

In addition, 1 type may contain the dye / pigment, and 2 or more types may contain it by arbitrary combinations and a ratio.
In addition, dyes and pigments that have been masterbatched with an aromatic polycarbonate resin (A) or other thermoplastic resin for the purpose of improving handling during extrusion and improving dispersibility in the resin composition are also used. May be.

  When the flame-retardant aromatic polycarbonate resin composition of the present invention contains a dye / pigment, the content may be appropriately selected according to the required design properties, but (A) 100 parts by mass of the aromatic polycarbonate resin On the other hand, it is usually 0.001 part by mass or more, preferably 0.01 part by mass or more, more preferably 0.1 part by mass or more, and usually 3 parts by mass or less, preferably 2 parts by mass or less, more preferably 1 part by mass or less, more preferably 0.5 part by mass or less. When the content of the dye / pigment is less than or equal to the lower limit of the above range, the coloring effect may not be sufficiently obtained. , May cause mold contamination.

<Antistatic agent>
The flame retardant aromatic polycarbonate resin composition of the present invention may contain an antistatic agent as desired. The antistatic agent is not particularly limited, but is preferably a sulfonic acid phosphonium salt represented by the following general formula (III).

(In the general formula (III), R ¹¹ is an alkyl group or aryl group having 1 to 40 carbon atoms and may have a substituent, and R ^{12 to} R ¹⁵ are each independently a hydrogen atom, carbon (It is an alkyl group or an aryl group of formulas 1 to 10, and these may be the same or different.)

R ¹¹ in the general formula (III) is an alkyl group having 1 to 40 carbon atoms or an aryl group, and an aryl group is preferable from the viewpoint of transparency, heat resistance, and compatibility with a polycarbonate resin. A group derived from an alkylbenzene or alkylnaphthalene ring substituted with an alkyl group of 1 to 34, preferably 5 to 20, particularly 10 to 15 is preferable. Further, R ^{12 to} R ¹⁵ in the general formula (III) are each independently a hydrogen atom, an alkyl group having 1 to 10 carbon atoms or an aryl group, preferably an alkyl having 2 to 8 carbon atoms, More preferably, it is a 3-6 alkyl group, and especially a butyl group is preferable.

Specific examples of such phosphonium sulfonates include tetrabutylphosphonium dodecylsulfonate, tetrabutylphosphonium dodecylbenzenesulfonate, tributyloctylphosphonium dodecylbenzenesulfonate, tetraoctylphosphonium dodecylbenzenesulfonate, tetraethylphosphonium octadecylbenzenesulfonate. , Tributylmethylphosphonium dibutylbenzenesulfonate, triphenylphosphonium dibutylnaphthylsulfonate, trioctylmethylphosphonium diisopropylnaphthylsulfonate, and the like. Of these, tetrabutylphosphonium dodecylbenzenesulfonate is preferred because it is compatible with polycarbonate and easily available.
These may be used alone or in combination of two or more.

  When the flame retardant aromatic polycarbonate resin composition of the present invention contains an antistatic agent, the content is 0.1 to 5.0 parts by mass with respect to 100 parts by mass of (A) aromatic polycarbonate resin. Preferably, it is 0.2 to 3.0 parts by mass, more preferably 0.3 to 2.0 parts by mass, and particularly preferably 0.5 to 1.8 parts by mass. If the content of the antistatic agent is less than 0.1 parts by mass, the antistatic effect cannot be obtained, and if it exceeds 5.0 parts by mass, the transparency and mechanical strength are reduced, and the surface of the molded product has silver and peeling. This is likely to cause poor appearance.

<Other resin components>
Unless the objective of this invention is impaired, the aromatic polycarbonate resin composition of this invention may contain other resin components other than (A) aromatic polycarbonate resin as a resin component. As other resin components that can be blended, for example, polystyrene resin, high impact polystyrene resin, hydrogenated polystyrene resin, polyacryl styrene resin, ABS resin, AS resin, AES resin, ASA resin, SMA resin, polyalkyl methacrylate resin, Polymethacryl methacrylate resin, polyphenyl ether resin, polycarbonate resin other than component (A), amorphous polyalkylene terephthalate resin, polyester resin other than component (B), amorphous polyamide resin, poly-4-methylpentene-1 , Cyclic polyolefin resin, amorphous polyarylate resin, polyether sulfone, etc., preferably polystyrene resin, ABS resin, AS resin, AES resin, ASA resin, polyphenylene ether resin, polymethacryl methacrylate. Over preparative resin, and polyester resin other than component (B).

  These may be used alone or in admixture of two or more. (A) In order to obtain the effects of the present invention by using an aromatic polycarbonate resin, these other resins It is preferable that a component shall be 40 mass parts or less with respect to 100 mass parts of (A) aromatic polycarbonate resin.

<Other additives>
The aromatic polycarbonate resin composition of the present invention may contain other additives in addition to those described above, if necessary, as long as desired physical properties are not significantly impaired. Examples of other additives include various resin additives such as inorganic fillers, anti-dripping agents, anti-fogging agents, anti-blocking agents, fluidity improvers, sliding property modifiers, plasticizers, dispersants, and antibacterial agents. Etc. One of these resin additives may be contained, or two or more thereof may be contained in any combination and ratio. Further, a thermoplastic elastomer may be contained as a molded article appearance improving agent as long as desired physical properties are not significantly impaired.

[Method for producing flame-retardant aromatic polycarbonate resin composition]
There is no restriction | limiting in the manufacturing method of the flame-retardant aromatic polycarbonate resin composition of this invention, The manufacturing method of a well-known aromatic polycarbonate resin composition can be employ | adopted widely.

  Specific examples thereof include (A) an aromatic polycarbonate resin and (B) a metal salt of phenylphosphonic acid according to the present invention, and other components blended as necessary, such as a tumbler, a Henschel mixer, and a super mixer. Examples thereof include a method of pre-mixing using various mixers such as Banbury mixer, roll, Brabender, single-screw kneading extruder, twin-screw kneading extruder, kneader, and the like.

  Also, for example, the flame-retardant aromatic polycarbonate resin of the present invention is prepared without mixing each component in advance or by mixing only a part of the components in advance and supplying the mixture to an extruder using a feeder and melt-kneading. Compositions can also be produced.

Also, for example, by mixing a part of the components in advance and supplying the resulting mixture to an extruder and melt-kneading it as a master batch, this master batch is again mixed with the remaining components and melt-kneaded. The flame-retardant aromatic polycarbonate resin composition of the present invention can also be produced.
In addition, for example, when mixing a component that is difficult to disperse, the component that is difficult to disperse is dissolved or dispersed in a solvent such as water or an organic solvent in advance, and kneaded with the solution or the dispersion. It can also improve sex.

  Examples of a method for melt-kneading after mixing each component in advance by the above method include a method using a Banbury mixer, roll, Brabender, single-screw kneading extruder, twin-screw kneading extruder, kneader and the like.

[Flame retardant aromatic polycarbonate resin molded product]
The flame-retardant aromatic polycarbonate resin composition of the present invention is usually molded into an arbitrary shape and used as an aromatic polycarbonate resin molded article. There are no restrictions on the shape, pattern, color, size, etc. of the molded product, and it may be set arbitrarily according to the application of the molded product.

  The manufacturing method of the aromatic polycarbonate resin molded article of the present invention is not particularly limited, and a molding method generally employed for the aromatic polycarbonate resin composition can be arbitrarily adopted. For example, injection molding method, ultra-high speed injection molding method, injection compression molding method, two-color molding method, hollow molding method such as gas assist, molding method using heat insulating mold, rapid heating mold were used. Molding method, foam molding (including supercritical fluid), insert molding, IMC (in-mold coating molding) molding method, extrusion molding method, sheet molding method, thermoforming method, rotational molding method, laminate molding method, press molding method, etc. Is mentioned. A molding method using a hot runner method can also be used.

  Examples of application of the molded article of the present invention thus manufactured include electrical and electronic equipment, OA equipment, information terminal equipment, machine parts, home appliances, vehicle parts, building members, various containers, leisure goods and miscellaneous goods. And parts such as lighting equipment. Among these, the molded product of the present invention is particularly an electrical / electronic device, OA device, information terminal device, home appliance, lighting device, etc. due to its excellent flame retardancy, transparency, heat resistance and rigidity. And is particularly suitable for use in electrical and electronic equipment, lighting equipment parts, and sheet members.

  Examples of the electric and electronic devices include display devices such as personal computers, game machines, televisions, car navigation systems, and electronic paper, printers, copiers, scanners, fax machines, electronic notebooks and PDAs, electronic desk calculators, electronic dictionaries, cameras, Examples include a video camera, a mobile phone, a battery pack, a recording medium drive and reading device, a mouse, a numeric keypad, a CD player, an MD player, and a portable radio / audio player. Especially, it can use suitably for the designable parts of housing | casings, such as a television, a personal computer, a car navigation system, and electronic paper.

As a component of the above-mentioned lighting device, it can be suitably used for a cover of LED lighting, EL lighting or the like.
In particular, the flame-retardant aromatic polycarbonate resin composition of the present invention can effectively exhibit its excellent transparency effect in a molded product having a thickness of 5 mm or more.

  Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited to the following examples, and can be arbitrarily modified and implemented without departing from the gist of the present invention. In the following description, “parts” means “parts by mass” based on mass standards unless otherwise specified.

  Measurement / evaluation methods and materials used in the following Examples and Comparative Examples are as follows.

<Flame retardance evaluation>
The oxygen index based on the standard of JIS K-7201-2 (ISO 4589-2) was measured. The larger the oxygen index, the better the flame retardancy.

<Transparency evaluation>
Comparison of the cloudiness of the thick-walled / slow-cooled molded product of the resin composition was judged by observing the 5 mm test piece described later with the naked eye from the thickness direction.
◎: Transparency is extremely good ○: High transparency and no problem in practical use △: Transparency is slightly inferior ×: Large white turbidity and inferior in transparency

[Materials used]
<(A) Aromatic polycarbonate resin>
Bisphenol A type aromatic polycarbonate produced by interfacial polymerization ("Iupilon (registered trademark) S-3000FN" manufactured by Mitsubishi Engineering Plastics Co., Ltd., viscosity average molecular weight 25000)

<(B) Phenylphosphonic acid metal salt>
1) Sodium phenylphosphonic acid salt Sodium phenylphosphonic acid salt was produced by the method described in paragraph [0020] of Patent Document 3. That is, phenylphosphonic acid sodium salt is prepared by dissolving phenylphosphonic acid in water and adding 0.5N sodium hydroxide, distilling off water under reduced pressure and drying at 200 ° C. White powder crystals of the salt were obtained. At this time, the following metal salts with different degrees of neutralization were obtained by adjusting the amount of sodium hydroxide added.
(B-1): Phenylphosphonic acid sodium salt at pH 7.4 (1% aqueous solution) (B-2): Phenylphosphonic acid sodium salt at pH 5.4 (1% aqueous solution)

2) Phenylphosphonic acid potassium salt Preparation of the above phenylphosphonic acid sodium salt was carried out in the same manner except that potassium hydroxide was used instead of sodium hydroxide.
(B-3): Phenylphosphonic acid potassium salt of pH 7.1 (1% aqueous solution) (B-4): Phenylphosphonic acid potassium salt of pH 5.9 (1% aqueous solution)

3) Phenylphosphonic acid zinc salt (B-5): “Eco Promote” manufactured by Nissan Chemical Industries, Ltd., pH 7.2 (1% aqueous solution)

<(C) Other metal salts>
(C-1) Sodium Phenyl Phosphate “Disodium Phenyl Phosphate Dihydrate” manufactured by Wako Pure Chemical Industries, Ltd. having the following structure in which the phenyl group and the phosphorus atom of phenylphosphonic acid are bonded via an oxygen atom. It was used.

  (C-2) Perfluorobutanesulfonic acid potassium salt (DIC Corporation "Megafac F-114P")

<(D) Phosphorus heat stabilizer>
Bis (2,6-di-tert-butyl-4-methylphenyl) pentaerythritol phosphite (“ADEKA STAB PEP36” manufactured by ADEKA)

<(E) Antioxidant>
Pentaerystol-tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate] ("Irganox 1010" manufactured by BASF)

[Examples 1 to 10, Comparative Examples 1 to 5]
<Preparation of resin composition>
Each of the above components was blended in the mass ratios shown in Tables 1 and 2, mixed for 20 minutes with a tumbler, then supplied to Nippon Steel Works (TEX30HSST) equipped with 1 vent, screw rotation speed 200 rpm, discharge The molten resin kneaded under the conditions of an amount of 20 kg / hour and a barrel temperature of 270 ° C. and extruded into a strand shape was rapidly cooled in a water tank and pelletized using a pelletizer to obtain pellets of an aromatic polycarbonate resin composition.

<Preparation of flame retardant evaluation test piece>
After drying the pellets obtained by the above-mentioned production method at 120 ° C. for 5 hours, with an injection molding machine (“SG75Mk-II” manufactured by Sumitomo Heavy Industries, Ltd.), the cylinder temperature is 270 ° C., the mold temperature is 60 ° C., Injection molding was performed under the condition of a molding cycle of 50 seconds to produce an ISO multipurpose test piece (4 mm thickness). The obtained test piece was used for the above-mentioned flame retardancy evaluation (oxygen index measurement).

<Preparation of test piece for transparency evaluation>
Similarly to the above, after drying the obtained pellets at 120 ° C for 5 hours, using a NEX80-9E injection molding machine manufactured by Nissei Plastic Industry Co., Ltd., under conditions of a cylinder temperature of 280 ° C and a mold temperature of 80 ° C, A thick plate having a thickness of 5 mm, a length of 65 mm, and a width of 45 mm was formed.

[Evaluation results]

From the results in Tables 1 and 2, the following can be understood.
Since Examples 1-10 use (B) phenylphosphonic acid metal salt as a flame retardant, it has an excellent balance between flame retardancy and transparency during slow cooling. In Examples 3 to 5, the addition amount of the metal salt of phenylphosphonic acid was changed. However, in Example 5, the addition amount of the metal salt was slightly larger, so that it was slightly inferior in combustibility.
On the other hand, Comparative Example 1 is inferior in flame retardancy because it does not contain a phenylphosphonic acid metal salt. Comparative Example 2 is inferior in flame retardancy because the amount of phenylphosphonic acid metal salt added is small. Comparative Example 3 is inferior in transparency because the phenylphosphonic acid metal salt is excessively added. Since the comparative example 4 used not the phenylphosphonic acid metal salt but the phenylphosphoric acid metal salt from which molecular structure differs, it is inferior to a flame retardance. Since the organic sulfonic acid metal salt was used for the comparative example 5, it is inferior to transparency.

Claims (3)

(A) For 100 parts by mass of an aromatic polycarbonate resin having a viscosity average molecular weight of 15,000 to 40,000, (B) a phenylphosphonic acid metal salt represented by the following general formula (I) or (II) is 0 A flame retardant aromatic polycarbonate composition containing 0.02 to 0.5 parts by mass.

(Wherein, R ₁ and R ₂ may be the same or different, a hydrogen atom, .M ₁ represents an alkyl group, or an alkoxycarbonyl group having 1 to 10 carbon atoms having 1 to 10 carbon atoms metal atom And M ₂ represents the same metal atom or hydrogen atom as M _1. )

(In the formula, R ₃ and R ₄ may be the same or different and each represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, or an alkoxycarbonyl group having 1 to 10 carbon atoms. M ₃ is a metal atom. Represents.) The flame-retardant aromatic polycarbonate according to claim 1, wherein M ₁ in the general formula (I) is lithium, sodium, or potassium, and M ₃ in the general formula (II) is calcium, magnesium, or zinc. Composition.   A molded article obtained by molding the flame-retardant aromatic polycarbonate composition according to claim 1.