JP2001131399A - Polycarbonate resin composition - Google Patents

Abstract

(57) [Abstract] [Problem] Excellent in transparency, color stability, and steam resistance.
Provided is a polycarbonate resin composition having excellent flame retardancy. (A) Aromatic polycarbonate resin 10
(B) 0.01 to 5 parts by weight of an organic sulfonic acid metal salt.
A polycarbonate resin composition, which is prepared by mixing 0.01 to 2 parts by weight of (c) a phosphorus-based stabilizer represented by the following formula (1). Embedded image (R ^{1 to} R ³ each represent an alkyl group having 1 to 20 carbon atoms, and m and n each represent an integer of 0 to 4.)

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a polycarbonate resin composition, and more particularly, to a flame-retardant polycarbonate resin composition.

[0002]

2. Description of the Related Art Polycarbonate resin has mechanical strength,
BACKGROUND ART As engineering plastics having excellent electrical properties and transparency, they are widely used in various fields such as OA equipment, electric / electronic equipment, automobile, and construction. Among these fields, there are fields requiring a high degree of flame retardancy, mainly in the OA equipment and electric / electronic equipment fields.

[0003] Among various thermoplastic resins, polycarbonate resins have a high oxygen index and generally have self-extinguishing properties. However, in order to satisfy safety requirements in the field of OA equipment, electric / electronic equipment, and other various applications, there is a strong demand for a resin composition with further improved flame retardancy. Further, there is a demand for not only improving the flame retardancy but also further improving the color tone stability, steam resistance and heat resistance stability of the molded product.

For the purpose of enhancing the flame retardancy of polycarbonate, for example, JP-A-53-11047 discloses an alkali (earth) perfluoroalkanesulfonate.
Although a low-flammability polycarbonate film to which a metal salt is added is described, the polycarbonate resin composition used for such a film has insufficient retention stability, and the yellowing degree (YI) increases during molding. The color tone deteriorates, and the haze (cloudiness value) of the steam resistance also changes greatly, causing a problem in the appearance of the molded product.

In order to improve color tone stability and steam resistance, for example, in Japanese Patent Publication No.
A flame-retardant polycarbonate resin composition in which a salt-based flame retardant and a pentaerythritol phosphite compound are added to an aromatic polycarbonate is described.
Even such a resin composition had insufficient steam resistance.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a polycarbonate resin composition which is excellent in transparency, color stability, steam resistance, impact resistance, heat resistance and flame retardancy. It is in.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and its gist is as follows:
(B) 0.01 to 5 parts by weight of a metal salt of an organic sulfonic acid and (c) 0.01 to 2 parts by weight of a phosphorus-based stabilizer represented by the following general formula (1) are mixed with 100 parts by weight of an aromatic polycarbonate resin. The polycarbonate resin composition.

[0008]

Embedded image

(R ^{1 to} R ³ each represent an alkyl group having 1 to 20 carbon atoms, and m and n each represent an integer of 0 to 4.)

Hereinafter, the present invention will be described in detail. The aromatic polycarbonate resin (a) in the present invention includes an aromatic hydroxy compound or an optionally branched thermoplastic aromatic polycarbonate resin produced by reacting an aromatic hydroxy compound or a small amount of the polyhydroxy compound with phosgene or a carbonic acid diester. It is a union or a copolymer. The production method is not limited, and the phosgene method (interfacial polymerization method) or the melting method (ester exchange method)
Etc. can be manufactured. Further, an aromatic polycarbonate resin produced by a melting method and having an adjusted amount of terminal OH groups can be used.

The aromatic dihydroxy compound includes:
2,2-bis (4-hydroxyphenyl) propane (=
Bisphenol A), tetramethylbisphenol A,
Bis (4-hydroxyphenyl) -P-diisopropylbenzene, hydroquinone, resorcinol, 4,4-
Dihydroxydiphenyl and the like are preferable, and bisphenol A is preferable.

In order to obtain a branched aromatic polycarbonate resin, phloroglucin, 4,6-dimethyl-2,4,4
6-tri (4-hydroxyphenyl) heptene-2,
4,6-dimethyl-2,4,6-tri (4-hydroxyphenyl) heptane, 2,6-dimethyl-2,4,6-
Tri (4-hydroxyphenyl) heptene-3,1,
3,5-tri (4-hydroxyphenyl) benzene,
Polyhydroxy compounds represented by 1,1,1-tri (4-hydroxyphenyl) ethane or 3,3-
Bis (4-hydroxyaryl) oxindole (=
Isatin bisphenol), 5-chlorisatin bisphenol, 5,7-dichlorisatin bisphenol,
5-bromoisatin bisphenol or the like may be used as a part of the aromatic dihydroxy compound, and the amount used is 0.01 to 10 mol%, preferably 0.1 to 10 mol%.
2 mol%.

In the above production method, in order to control the molecular weight, a monovalent aromatic hydroxy compound may be used as a part of the aromatic dihydroxy compound, and m- and p-methylphenol, m- and p-propyl may be used. Phenol, p
-Tert-butylphenol and p-long-chain alkyl-substituted phenols.

The aromatic polycarbonate resin is preferably a polycarbonate resin derived from 2,2-bis (4-hydroxyphenyl) propane, or 2,2-bis (4-hydroxyphenyl) propane and another aromatic dihydroxy compound. And a polycarbonate copolymer derived therefrom. In the present invention, the aromatic polycarbonate resin (a) may be a mixture of two or more resins.

The molecular weight of the aromatic polycarbonate resin is
The viscosity-average molecular weight calculated from the solution viscosity measured at a temperature of 25 ° C. using methylene chloride as a solvent is preferably 16,000 to 30,000, and more preferably 18,000 to 26,000.

The metal salt of an organic sulfonic acid (b) in the present invention includes a metal salt of an aliphatic sulfonic acid and a metal salt of an aromatic sulfonic acid. As the metal of the organic sulfonic acid metal salt, preferably, an alkali metal, an alkaline earth metal and the like are mentioned. As the alkali metal and the alkaline earth metal, sodium, lithium, potassium, rubidium, cesium, beryllium, magnesium, calcium , Strontium, and barium.
The metal organic sulfonic acid salt may be a mixture of two or more kinds.

Examples of the organic sulfonic acid metal salts include perfluoroalkane-sulfonic acid metal salts and aromatic sulfone sulfonic acid metal salts. Among them, preferred is
The former is a perfluoroalkane-sulfonic acid metal salt. Specific examples of perfluoroalkane-sulfonic acid metal salts include alkali metal salts of perfluoroalkane-sulfonic acids, alkaline earth metal salts of perfluoroalkane-sulfonic acids, and the like. Alkali metal sulfonic acid salts having from 8 to 8 perfluoroalkane groups and alkaline earth metal sulfonic acid salts having from 1 to 8 perfluoroalkane groups.

Specific examples of perfluoroalkane-sulfonic acid include perfluoromethane-sulfonic acid, perfluoroethane-sulfonic acid, perfluoropropane-sulfonic acid, perfluorobutane-sulfonic acid, perfluoropentane-sulfonic acid, Examples include perfluorohexane-sulfonic acid, perfluoroheptane-sulfonic acid, and perfluorooctanesulfonic acid.

Preferred examples of the metal salt of aromatic sulfonic acid include alkali metal salts of aromatic sulfonic acid and alkaline earth metal salts of aromatic sulfonic acid. The alkaline earth metal sulfonate salt may be a polymer.

Specific examples of the aromatic sulfonesulfonic acid metal salt include sodium salt of diphenylsulfon-3-sulfonic acid, potassium salt of diphenylsulfon-3-sulfonic acid, and 4,4'-dibromodiphenyl-sulfon-3.
Sodium salt of sulfonic acid, potassium salt of 4,4′-dibromodiphenyl-sulfone-3-sulfonic acid, 4-
Calcium salt of chloro-4'-nitrodiphenylsulfone-3-sulfonic acid, diphenylsulfone-3,3'-
Disodium acid disodium salt, diphenylsulfone
And dipotassium salt of 3,3′-disulfonic acid.

The amount of the metal organic sulfonic acid is 0.01 to 100 parts by weight of the aromatic polycarbonate resin.
5 parts by weight. When the amount of the organic sulfonic acid metal salt is 0.
When the amount is less than 01 parts by weight, the flame retardancy of the resin composition is insufficient, and when the amount exceeds 5 parts by weight, the thermal stability tends to decrease.
The amount of the organic sulfonic acid metal salt is preferably 0.02 to 4 parts by weight per 100 parts by weight of the aromatic polycarbonate resin.
Parts by weight, more preferably 0.03 to 3 parts by weight.

The phosphorus stabilizer (c) in the present invention is a compound represented by the following general formula (1).

[0023]

Embedded image

Each of R ^{1 to} R ³ is a linear or branched alkyl group having 1 to 20 carbon atoms. R ¹ and R ² are each preferably a linear or branched alkyl group having 1 to 10 carbon atoms, and R ³ is preferably a 1 to 1 carbon atom.
8 linear or branched alkyl groups. Specific examples of R ¹ and R ² include a methyl group, an ethyl group, a propyl group, a butyl group, and a pentyl group.
A tert-butyl group is exemplified. Specific examples of R ³ include a methyl group, an ethyl group, a propyl group, a butyl group, a hexyl group, a heptyl group, an octyl group, a nonyl group, a decyl group, and a dodecyl group. Groups. m and n are each 0 to
It is an integer of 4 and preferably 2. When m and n are 2, R ¹ and R ² are preferably bonded at the ortho and para positions of the oxygen atom bonded to the benzene ring.

(C) The phosphorus-based stabilizer is preferably a compound represented by the following general formula (2).

[0026]

Embedded image

Each of R ^{4 to} R ⁸ is a linear or branched alkyl group having 1 to 20 carbon atoms. R ^{4 to} R ⁷ are each preferably a linear or branched alkyl group having 1 to 10 carbon atoms, and R ⁸ is preferably a C 1 to 18 carbon atom.
Is a linear or branched alkyl group.

The phosphorus-based stabilizer is a compound represented by the general formula (2), wherein R ^{4 to} R ⁷ each represent
Compounds which are t-butyl groups and R ⁸ is a linear octyl group are particularly preferred. Such a stabilizer is commercially available from Asahi Denka Co., Ltd. under the name of ADK STAB HP-10. By using such a stabilizer, Tris (2,4-di-t
tert-butylphenyl) phosphite and bis (2,2)
As compared with 4-di-tert-butylphenyl) pentaerythritol-diphosphite, a polycarbonate resin composition having excellent color tone stability after stay molding can be obtained.

The amount of the phosphorus-based stabilizer represented by the general formula (1) is 0.01 to 2 parts by weight based on 100 parts by weight of the aromatic polycarbonate resin. If the amount of the phosphorus-based stabilizer is less than 0.01 part by weight, the effect as a stabilizer is insufficient, and even if it exceeds 2 parts by weight, further improvement of the effect cannot be obtained. The amount of the phosphorus-based stabilizer represented by the general formula (1) is preferably 0.02 to 1.5 parts by weight, more preferably 0.02 to 1.5 parts by weight, based on 100 parts by weight of the aromatic polycarbonate resin. 1 part by weight.

By blending an aromatic polycarbonate resin with a phenolic antioxidant together with the phosphorus stabilizer, a polycarbonate resin composition having further excellent transparency, color tone stability and steam resistance can be obtained.

The (d) phenolic antioxidant in the present invention includes a hindered phenolic antioxidant. Specific examples 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 ', 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 (1
H, 3H, 5H) -Trione, 2,6-di-tert-
Butyl-4- (4,6-bis (octylthio) -1,
3,5-triazin-2-ylamino) phenol and the like. Of the above, pentaerythritol tetrakis [3- (3,5-di-tert-butyl-4) is particularly preferred.
-Hydroxyphenyl) propionate] and octadecyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate are preferred. These two phenolic antioxidants are Ciba Specialty
It is commercially available from Chemicals under the names Irganox 1010 and Irganox 1076.

The amount of the phenolic antioxidant is preferably 0.01 to 2 parts by weight based on 100 parts by weight of the aromatic polycarbonate resin. If the amount of the phenolic antioxidant is less than 0.01 part by weight, the effect as an antioxidant is insufficient, and if it exceeds 2 parts by weight, no further effect as an antioxidant is obtained. The blending amount of the phenolic antioxidant is more preferably 0.02 to 1 part by weight based on 100 parts by weight of the aromatic polycarbonate resin.

The polycarbonate resin composition of the present invention may further contain an ultraviolet absorber. Examples of the ultraviolet absorber include benzophenone, benzotriazole, phenyl salicylate, and hindered amine. Even if such an ultraviolet absorber is blended, weather resistance can be improved without impairing color tone stability, steam resistance, transparency, mechanical properties, impact resistance, and heat resistance.

As the benzophenone-based ultraviolet absorber,
2,4-dihydroxy-benzophenone, 2-hydroxy-4-methoxy-benzophenone, 2-hydroxy-
4-n-octoxy-benzophenone, 2-hydroxy-4-dodecyloxy-benzophenone, 2-hydroxy-4-octadecyloxy-benzophenone, 2,2′-
Dihydroxy-4-methoxy-benzophenone, 2,
2'-dihydroxy-4,4'-dimethoxy-benzophenone, 2,2 ', 4,4'-tetrahydroxy-benzophenone and the like.

As the benzotriazole ultraviolet absorber, 2- (2'-hydroxy-5-methylphenyl) benzotriazole, 2- (2'-hydroxy-3 ',
5'-di-tert-butylphenyl) benzotriazole, 2- (2'-hydroxy-3'-tert-butyl-5'-methylphenyl) benzotriazole and the like.

Examples of the phenyl salicylate-based ultraviolet absorber include phenyl salicylate, 2-4-di-tert-butylphenyl-3,5-di-tert-butyl-4-hydroxybenzoate, and the like. Examples of the hindered amine-based ultraviolet absorber include bis (2,2,6,6-tetramethylpiperidin-4-yl) sebacate.

As the ultraviolet absorber, in addition to the above compounds, compounds having a function of converting the energy possessed by ultraviolet rays into vibration energy in the molecule and releasing the vibration energy as heat energy are included. Furthermore, those that exhibit effects when used in combination with an antioxidant or a coloring agent,
Alternatively, a light stabilizer called a quencher, which acts as a light energy conversion agent, can be used in combination.

The amount of the ultraviolet absorber is preferably 0.01 to 100 parts by weight of the aromatic polycarbonate resin.
To 2 parts by weight, more preferably 0.02 to 1 part by weight.

The method for producing the polycarbonate resin composition of the present invention is not particularly limited, and examples thereof include an aromatic polycarbonate resin, a metal salt of an organic sulfonic acid, a phosphorus-based stabilizer represented by the above formula (1), and a phenol-based compound. A method in which an antioxidant is melt-kneaded all at once, an aromatic polycarbonate resin, a metal salt of an organic sulfonic acid and a phosphorus-based stabilizer represented by the above general formula (1) are kneaded in advance, and then a phenol-based antioxidant is compounded. For example, a method of dividing and melting and kneading an auxiliary agent, for example, may be used.

The polycarbonate resin composition of the present invention contains, in addition to the above components (a) to (d), an ultraviolet absorber and, if necessary, a pigment, a dye, a lubricant, and a phenyl group. Silicone flame retardants and / or other flame retardants, release agents, additives such as slidability improvers, fibrous reinforcements such as glass fibers and carbon fibers, plate-like reinforcements such as mica, talc, glass flakes or Whiskers such as potassium titanate and aluminum borate can be added and blended.

In the polycarbonate resin composition of the present invention, styrene resins, polyester resins such as polybutylene terephthalate and polyethylene terephthalate, polyamide resins,
Other thermoplastic resins such as polyolefin resins can be blended. The compounding amount of such other thermoplastic resin is preferably 40% by weight or less, more preferably 30% by weight or less of the whole resin composition.

In the polycarbonate resin composition according to the present invention, the base resin as the main component is preferably a polycarbonate resin containing no halogen, and each component to be blended in the base resin contains as few compounds as possible containing halogen. It is preferable to use only a compound containing no halogen. Such a flame-retardant resin composition has a small decrease in heat stability, impact resistance and heat resistance, and has a high corrosion resistance on a molding machine screw and a molding die. Problems and environmental pollution are unlikely to occur, which is preferable.

[0043]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to the following examples unless it exceeds the gist thereof. The following raw materials were used in Examples and Comparative Examples. (1) Polycarbonate resin: Iupilon S-300
0, manufactured by Mitsubishi Engineering-Plastics Corporation, viscosity average molecular weight 21,000, poly-4,4-isopropylidene diphenyl carbonate (hereinafter also referred to as “PC”).

(2) Metal salts of organic sulfonic acids: potassium perfluorobutanesulfonic acid. (3) Phosphorus stabilizer-1: Phosphorus stabilizer represented by the following formula (3) (trade name: ADK STAB HP-10, manufactured by Asahi Denka Kogyo KK).

[0045]

Embedded image

(4) Phosphorus stabilizer-2: bis (2,6-
Di-tert-butyl-4-methylphenyl) pentaerythritol diphosphite, trade name: ADK STAB PEP-36, manufactured by Asahi Denka Kogyo KK (5) Phosphorus-based stabilizer-3: Tris (2,4-di-ter)
t-butylphenyl) phosphite, trade name: ADK STAB 2112, manufactured by Asahi Denka Kogyo KK

(6) Phenolic antioxidant-1: octadecyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate, trade name: IRGA
NOX1076, manufactured by Ciba Specialty Chemicals Co., Ltd. (7) Phenolic antioxidant-2: pentaerythritol tetrakis [3- (3,5-di-tert-butyl-)
4-hydroxyphenyl) propionate], trade name:
IRGANOX1010, manufactured by Ciba Specialty Chemicals Co., Ltd. (8) UV absorber: 2- (2'-hydroxy-5'-
tert-octylphenyl) benzotriazole.

The physical properties of the test pieces were evaluated as described below. (9) Flammability: A vertical combustion test was performed using a 2.5 mm-thick UL standard test piece, and evaluated in accordance with UL standard (UL-94). (10) Haze and degree of yellowing (YI): A 3 mm plate of the composition was molded, and the haze was measured using a turbidimeter NDH-20.
00 (trade name, manufactured by Nippon Denshoku Industries Co., Ltd.), and the yellowing degree was measured by a spectroscopic colorimeter SE-2000 (manufactured by Nippon Denshoku Industries Co., Ltd.). (11) Steam resistance: A 3 mm plate piece was subjected to a pressure cooker test (120 ° C., RH 100%, 5 hr) to evaluate the degree of fogging before and after the test. ：: The plate did not become cloudy after the test. X: The plate became cloudy after the test.

(12) Izod impact strength: thickness 3.2
The measurement was performed in accordance with JIS K7110 (1984) using an Izod impact test piece having a notch of 0.25R in mm. The unit of intensity is J / m. (13) Deflection temperature under load: thickness 6.4 mm, width 12.7
JIS K6911 (199)
It measured according to 5). The load is 1.82 MPa and the unit of temperature is ° C.

Example 1 Aromatic Polycarbonate 10
0 parts by weight, 0.1 part by weight of an organic sulfonic acid metal salt and 0.05 part by weight of a phosphorus-based stabilizer-1 are mixed, mixed by a tumbler for 20 minutes, and then heated to a cylinder temperature of a 30 mm twin-screw extruder. The pellets were pelletized at 270 ° C, and a 2.5 mm-thick combustion test was molded at a cylinder temperature of 290 ° C using an injection molding machine, and evaluated according to the UL test method. Further, a plate having a thickness of 3 mm was formed at a cylinder temperature of 280 ° C. by normal molding and by holding at 280 ° C. for 10 minutes, and the haze value and the yellowing degree were evaluated. The steam resistance was evaluated using a 3 mm plate. Table 1 shows the evaluation results.

Example 2 Aromatic polycarbonate 10
0 parts by weight, 0.1 parts by weight of an organic sulfonic acid metal salt,
After mixing 0.05 part by weight of phosphorus stabilizer-1 and 0.05 part by weight of phenolic antioxidant-1 and mixing them in a tumbler for 20 minutes, pellets at a cylinder temperature of 270 ° C. with a 30 mm twin screw extruder. It has become. Molding and evaluation were performed in the same manner as in Example 1. The results are shown in Table 1. Example 3 Pelletization was performed in the same manner as in Example 2 except that the amount of phenolic antioxidant-1 was changed to 0.1 part by weight, and molding and evaluation were performed in the same manner.
The results are shown in Table 1.

Example 4 Pellets were formed in the same manner as in Example 2 except that phenolic antioxidant-1 was changed to phenolic antioxidant-2, and molding and evaluation were performed in the same manner. went. The results are shown in Table 1. [Example 5] To 100 parts by weight of an aromatic polycarbonate,
0.1 parts by weight of organic sulfonic acid metal salt, 0.05 parts by weight of phosphorus-based stabilizer-1, 0.05 parts by weight of phenolic antioxidant-1 and 0.1 parts by weight of ultraviolet absorber The mixture was mixed in a tumbler for 20 minutes, and then pelletized at a cylinder temperature of 270 ° C. by a 30 mm twin screw extruder. Molding and evaluation were performed in the same manner as in Example 1. The results are shown in Table 1.

[0053]

[Table 1]

Comparative Example 1 Example 1 was repeated except that the phosphorus stabilizer-1 was changed to the phosphorus stabilizer-2.
Pellets were formed in the same manner as described above, and molded and evaluated in the same manner. Table 2 shows the results. [Comparative Example 2] Pellets were formed in the same manner as in Example 1 except that phosphorus stabilizer-1 was changed to phosphorus stabilizer-3, and molding and evaluation were performed in the same manner. Table 2 shows the results.

Comparative Example 3 Example 4 was repeated except that the phosphorus stabilizer-1 was changed to the phosphorus stabilizer-2.
Pellets were formed in the same manner as described above, and molded and evaluated in the same manner. The results are shown in Table 1. Comparative Example 4 A pellet was formed in the same manner as in Example 2 except that the phosphorus-based stabilizer-1 was changed to the phosphorus-based stabilizer-3, and molding and evaluation were performed in the same manner. Table 2 shows the results. [Comparative Example 5] Pellets were formed in the same manner as in Example 2 except that the metal salt of an organic sulfonic acid was not used, and molding and evaluation were performed in the same manner. Table 2 shows the results.

[0056]

[Table 2]

When Examples 1 to 5 are compared with Comparative Examples 1 and 3, when the phosphorus-based stabilizer-1 is used, the haze value and yellowing degree after residence hardly change, and the steam resistance is also low. On the other hand, when phosphorus-based stabilizer-2 was used, the steam resistance was poor. In Comparative Examples 2 and 4, the initial haze value and the initial yellowing degree were higher than those in Examples, and in Comparative Example 5, the flammability was V-2.

[0058]

Industrial Applicability The polycarbonate resin composition of the present invention is excellent not only in mechanical strength such as impact resistance and heat resistance, but also in transparency, color tone stability, steam resistance and flame retardancy. As a large molded product or a thin molded product,
It is very useful for various industrial parts such as automobile parts, electronic / electric parts, precision machine parts.

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Kazuhiko Ishii 5-6-1, Higashi-Hachiman, Hiratsuka-shi, Kanagawa F-term in the Technology Center of Mitsubishi Engineering-Plastics Corporation (reference) 4J002 CG011 CG031 EH048 EJ028 EP018 EV256 EW048 EW087 FD010 FD037 FD050 FD078 FD136 GQ00

Claims (5)

[Claims] (A) Aromatic polycarbonate resin 10
(B) 0.01 to 5 parts by weight of an organic sulfonic acid metal salt.
A flame-retardant polycarbonate resin composition, which comprises 0.01 to 2 parts by weight of (c) a phosphorus-based stabilizer represented by the following general formula (1). Embedded image (R ^{1 to} R ³ each represent an alkyl group having 1 to 20 carbon atoms, and m and n each represent an integer of 0 to 4.) 2. The flame-retardant polycarbonate resin composition according to claim 1, wherein (b) the metal salt of an organic sulfonic acid is a metal salt of perfluoroalkanesulfonic acid. (C) a phosphorus represented by the general formula (1)
R in the system stabilizer ¹And R^TwoAre respectively tert-
The butyl group is described in claim 1 or 2,
Flame-retardant polycarbonate resin composition 4. (a) Aromatic polycarbonate resin 10
0 parts by weight, (d) 0.01 to 2 phenolic antioxidants
The flame-retardant polycarbonate resin composition according to any one of claims 1 to 3, wherein the composition comprises parts by weight. 5. The flame-retardant polycarbonate resin composition according to claim 1, wherein (a) the aromatic polycarbonate resin has a viscosity average molecular weight of 16,000 to 30,000.