JP2003012911A - Aromatic polycarbonate resin composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aromatic polycarbonate resin composition which can be used even under a condition of high humidity and high temperature to give no remarkable change in properties, has a long shelf life and is excellent in stability. SOLUTION: The aromatic polycarbonate resin composition comprises 10-90 wt.% of an aromatic polycarbonate resin and 90-10 wt.% of an aromatic vinyl- diene-cyanovinyl copolymer, wherein the aromatic polycarbonate resin has a viscosity average molecular weight of 12,000 or more, is produced by transesterification, and has a terminal hydroxyl group at a rate of less than 5 mol% relative to the total of all terminal groups.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a resin composition containing an aromatic polycarbonate resin and an aromatic vinyl-diene-vinyl cyanide copolymer (for example, a styrene-butadiene-acrylonitrile copolymer). In particular, the present invention relates to an aromatic polycarbonate resin composition having remarkably improved moisture resistance and long-term heat aging characteristics.

[0002]

2. Description of the Related Art Aromatic polycarbonate resin (PC resin) has excellent heat resistance and mechanical properties, but its notch sensitivity is so sensitive that if the molded product is scratched, its impact strength will be significantly reduced. There is. It also has drawbacks such as high molding temperature and poor fluidity. Meanwhile, ABS
Resin (acrylonitrile-butadiene-styrene resin)
Is a material that is well balanced in terms of moldability, impact strength, and dimensional properties, and is widely used in automobiles, home appliances, office automation equipment, etc., but has the drawback of low heat resistance. Therefore, in Japanese Patent Publication No. 38-15225,
It has been proposed to blend notch impact strength, molding workability, and heat resistance by blending a PC resin with a highly compatible ABS resin. At present, the polymer alloy of PC resin / ABS resin is one of the resin compositions widely used in the field of OA equipment and electric / electronic products.

In recent years, in these applications, there has been an increasing demand for miniaturization and weight reduction of products, and new molding methods have been tried, and resins used are required to have thin-wall molding performance, precision molding performance and high flame retardancy. Tend to be. In recent years, in such applications, the use in a high humidity environment, the storage of products, and the like have been rapidly increasing, and the physical properties often deteriorate significantly due to the low moisture resistance of the resin. (Furthermore, since ABS resin uses butadiene rubber, it has a problem in weather resistance.) Generally, a polymer alloy obtained by blending a PC resin and an ABS resin has high moisture resistance and long-term heat aging characteristics. No, it was a problem.

Various techniques have been proposed to solve the above problems. For example, JP-A-11-130954 proposes that in a PC resin composition, an ABS copolymer having a low content of an alkali metal is used and an epoxy stabilizer is further added to improve moisture resistance. There is. Further, in Japanese Patent Laid-Open No. 2000-26713, by adding a specific thermoplastic resin to a polymer alloy of PC resin and rubber-modified thermoplastic resin, long-term heat aging characteristics are maintained while maintaining impact resistance and heat resistance. We have proposed excellent thermoplastic resins. However, although these proposals have some effects, they are far from practical use,
An essential improvement method was desired early on.

[0005]

Accordingly, the present invention is intended to solve the problems associated with the prior art as described above, and an aromatic polycarbonate resin composition having improved moisture resistance and long-term heat aging characteristics. Is intended to provide.

[0006]

[Means for Solving the Problems] The inventors of the present invention have made extensive studies to find an aromatic polycarbonate resin composition having improved moisture resistance and long-term heat aging characteristics. As a result, an aromatic polycarbonate produced by a transesterification method has been found. It was found that the resin is an aromatic polycarbonate resin composition having improved moisture resistance and long-term heat aging characteristics by reducing the terminal hydroxyl group concentration of the aromatic polycarbonate resin below a specific amount, and completes the present invention. Came to. That is, aromatic polycarbonate resins 10 to 9 having a viscosity average molecular weight of 12,000 or more and produced by a transesterification method.
In a resin composition containing 0% by weight and 90 to 10% by weight of an aromatic vinyl-diene-vinyl cyanide copolymer, the aromatic hydroxyl group of the aromatic polycarbonate resin has less than 5 mol% of all terminal groups. The present invention relates to a resin composition containing a group polycarbonate resin.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be specifically described below. The aromatic polycarbonate resin of the present invention is obtained by a transesterification reaction using an aromatic dihydroxy compound and a carbonic acid diester as raw materials in the presence of a transesterification catalyst. The aromatic dihydroxy compound used in the present invention is a compound having two aromatic hydroxyl groups in the molecule, and is preferably a compound represented by the following formula (1).

[0008]

[Chemical 1]

(In the formula, W is a single bond, an alkylene group having 1 to 8 carbon atoms, an alkylidene group having 2 to 8 carbon atoms, and 5 to 5 carbon atoms.
15 cycloalkylene group, cycloalkylidene group having 5 to 15 carbon atoms, or -O-, -S-, -CO-, -SO
-, - SO ₂ - those selected from the group consisting of divalent groups represented by, Y and Z are halogen or 1 carbon atoms
6 is a hydrocarbon group, p and q are integers of 0 to 2, and Y and Z, and p and q may be the same or different. )

Examples of the aromatic dihydroxy compound represented by the above formula (1) include bis (4-hydroxydiphenyl) methane, 2,2-bis (4-hydroxyphenyl) propane and 2,2-bis (4). -Hydroxy-3-methylphenyl) propane, 2,2-bis (4-hydroxy-3-t-butylphenyl) propane, 2,2-bis (4-hydroxy-3,5-dimethylphenyl) propane, 2, 2-bis (4-hydroxy-3,5-dibromophenyl) propane, 4,4-bis (4-hydroxyphenyl) heptane, 1,1-bis (4-hydroxyphenyl) cyclohexane, 4,4′-dihydroxybiphenyl , 3,3 ', 5,5'-tetramethyl-4,4'-
Examples thereof include dihydroxybiphenyl, bis (4-hydroxyphenyl) sulfone, bis (4-hydroxyphenyl) sulfide, bis (4-hydroxyphenyl) ether, and bis (4-hydroxyphenyl) ketone.
Particularly preferred is 2,2-bis (4-hydroxyphenyl) propane (hereinafter abbreviated as "bisphenol A"). These aromatic dihydroxy compounds may be used alone or in combination of two or more. The carbonic acid diester used in the present invention is represented by the following general formula (2).

[0011]

[Chemical 2]

(In the formula, A and A'represent an aliphatic group or a substituted aliphatic group having 1 to 18 carbon atoms, an aromatic group or a substituted aromatic group, which may be the same or different.) The carbonic acid diester represented by the general formula (2) is
For example, dimethyl carbonate, diethyl carbonate, dialkyl carbonate compounds such as di-t-butyl carbonate, diphenyl carbonate, and substituted diphenyl carbonate such as ditolyl carbonate are exemplified, but diphenyl carbonate and substituted diphenyl carbonate are preferable, Diphenyl carbonate is particularly preferable. These carbonic acid diesters may be used alone or in combination of two or more.

In the present invention, a transesterification catalyst is used to obtain the aromatic polycarbonate resin.
As the catalyst, an alkali metal compound and / or an alkaline earth metal compound is used, and additionally, a basic boron compound, a basic phosphorus compound, a basic ammonium compound,
Alternatively, a basic compound such as an amine compound can be used in combination, but it is particularly preferable to use the alkali metal compound and / or the alkaline earth metal compound alone from the viewpoint of physical properties and handling.

The catalyst amount is aromatic dihydroxy.
1 × 10 with respect to 1 mol of the compound^-8~ 5 x 10^-6Mole
It is preferably used in the range, more preferably 1 ×
10 ^-7~ 3 x 10^-6In the molar range, particularly preferably 2 ×
10^-7~ 2 x 10^-6Used in the molar range. This amount
If the amount is less, the molecular weight and the amount of terminal hydroxy groups are
Polymerization activity required to produce aromatic polycarbonate resins
If there is more than this amount, po
Limmer hue deteriorates, branching increases, polymer moldability
Tend to be compromised.

Examples of the alkali metal compound include sodium hydroxide, potassium hydroxide, lithium hydroxide, cesium hydroxide, sodium hydrogen carbonate, potassium hydrogen carbonate, lithium hydrogen carbonate, cesium hydrogen carbonate, sodium carbonate, potassium carbonate and carbonic acid. Lithium, cesium carbonate, sodium acetate, potassium acetate, lithium acetate, cesium acetate, sodium stearate, potassium stearate, lithium stearate, cesium stearate, sodium borohydride, potassium borohydride, lithium borohydride, hydride Cesium boron, sodium phenyl boride, potassium phenyl boride, lithium phenyl boride, cesium phenyl boride, sodium benzoate, potassium benzoate, lithium benzoate,
Cesium benzoate, disodium hydrogen phosphate, 2 potassium hydrogen phosphate, 2 lithium hydrogen phosphate, 2 cesium hydrogen phosphate, 2 sodium phenyl phosphate, 2 potassium phenyl phosphate, 2 lithium phenyl phosphate, 2 phenyl phosphate Cesium, sodium, potassium, lithium, cesium alcoholate, phenolate, bisphenol A
2 sodium salt, 2 potassium salt, 2 lithium salt, 2 cesium salt and the like. As the alkaline earth metal compound, for example, calcium hydroxide, barium hydroxide, magnesium hydroxide, strontium hydroxide, calcium hydrogen carbonate, barium hydrogen carbonate, magnesium hydrogen carbonate, strontium hydrogen carbonate, calcium carbonate, barium carbonate, Magnesium carbonate, strontium carbonate,
Examples thereof include calcium acetate, barium acetate, magnesium acetate, strontium acetate, calcium stearate, barium stearate, magnesium stearate, and strontium stearate.

Specific examples of the basic boron compound include tetramethylboron, tetraethylboron, tetrapropylboron, tetrabutylboron, trimethylethylboron, trimethylbenzylboron, trimethylphenylboron, triethylmethylboron, triethylbenzylboron and triethylphenyl. Boron, tributylbenzylboron, tributylphenylboron, tetraphenylboron, benzyltriphenylboron, methyltriphenylboron, sodium salts such as butyltriphenylboron, potassium salts, lithium salts, calcium salts, barium salts, magnesium salts, or strontium. Salt etc. are mentioned. Examples of the basic phosphorus compound include triethylphosphine, tri-n-propylphosphine, triisopropylphosphine, tri-n-butylphosphine, triphenylphosphine, tributylphosphine,
Alternatively, a quaternary phosphonium salt and the like can be mentioned.

Examples of the basic ammonium compound include tetramethylammonium hydroxide, tetraethylammonium hydroxide, tetrapropylammonium hydroxide, tetrabutylammonium hydroxide, trimethylethylammonium hydroxide,
Trimethylbenzylammonium hydroxide, trimethylphenylammonium hydroxide, triethylmethylammonium hydroxide, triethylbenzylammonium hydroxide, triethylphenylammonium hydroxide, tributylbenzylammonium hydroxide, tributylphenylammonium hydroxide, tetraphenylammonium hydroxide, benzyltri Examples thereof include phenylammonium hydroxide, methyltriphenylammonium hydroxide, butyltriphenylammonium hydroxide and the like.

Examples of amine compounds include 4-aminopyridine, 2-aminopyridine, N, N-dimethyl-4-aminopyridine, 4-diethylaminopyridine,
2-hydroxypyridine, 2-methoxypyridine, 4-
Methoxypyridine, 2-dimethylaminoimidazole,
2-methoxyimidazole, imidazole, 2-mercaptoimidazole, 2-methylimidazole, aminoquinoline and the like can be mentioned. The transesterification reaction is generally carried out in a multi-step process of two or more steps. Specifically, the first
The reaction in the second step is carried out under reduced pressure of 9.3 × 10 ^{4 to} 1.33 × 10 ³ Pa at 120 to 260 ° C., preferably 180 to 240.
The reaction is carried out at a temperature of ° C for 0.1 to 5 hours, preferably 0.1 to 3 hours. Then, the reaction temperature is raised while increasing the pressure reduction degree of the reaction system, and finally, the pressure is reduced to 133 Pa or less under a reduced pressure of 24
The polycondensation reaction is performed at a temperature of 0 to 320 ° C. The reaction may be performed in a batch system, a continuous system, or a combination of a batch system and a continuous system, and the apparatus used may be a tank system, a tube system, or a column system.

The terminal hydroxyl group of the aromatic polycarbonate resin of the present invention is less than 5 mol% based on all the terminal groups,
Preferably less than 4.95 mol%, more preferably 4.95 mol%.
It is preferable to control it to less than 90 mol%. Here, the mol% of the terminal hydroxyl groups of the aromatic polycarbonate resin is determined by measuring the number of terminal hydroxyl groups (μeq / g) and the number of terminal phenyl groups (μeq / g) using ¹ H-NMR by a conventional method, The ratio of the number of hydroxyl groups can be calculated to obtain the terminal hydroxyl group concentration (mol%). Using an aromatic polycarbonate resin containing 5 mol% or more of terminal hydroxyl groups based on all terminal groups, aromatic vinyl-diene-
When a resin composition with a vinyl cyanide copolymer is produced, the moisture resistance and the long-term heat aging properties tend to be significantly deteriorated. The lower limit of the ratio of the terminal hydroxyl groups to all the terminal groups is not particularly limited, however, it is usually 0.5% or more, preferably 1% or more because it is difficult to manufacture if it is extremely small.

The ratio of the terminal hydroxyl groups of the aromatic polycarbonate resin is influenced by the polymerization conditions such as the polymerization temperature, the degree of vacuum at the time of polymerization, the condenser temperature, etc., but under certain conditions, it is represented by bisphenol A. It can be controlled by the charging ratio of the aromatic dihydroxy compound and the carbonic acid diester typified by diphenyl carbonate. For example, when it is assumed that the above-mentioned respective factors are produced under the same conditions, and the obtained resin also has the same viscosity average molecular weight, the aromatic polycarbonate resin used for any application produced at any charging ratio. When the ratio of the terminal hydroxyl groups is 20%, an aromatic polycarbonate resin having a ratio of the terminal hydroxyl groups of less than 5 mol% based on all the terminal groups can be obtained by adjusting the charging ratio of the carbonic acid diester to the aromatic dihydroxy compound. It can be obtained by slightly increasing the charging ratio.

The viscosity average molecular weight of the aromatic polycarbonate resin in the present invention is 12,000 or more. It is preferably 13,000 or more, more preferably 15,
It is more than 000. Further, it is preferably 32,000 or less, more preferably 27,000 or less. If the viscosity average molecular weight is too low, sufficient strength as a composition cannot be obtained, and if it is too high, the melt fluidity during molding tends to decrease.

The aromatic vinyl-diene-vinyl cyanide copolymer (hereinafter sometimes simply referred to as a copolymer) used in the present invention contains at least an aromatic vinyl monomer, a diene, and a vinyl cyanide monomer. The monomer may be contained as a constituent unit, and if necessary, other copolymerizable monomer may be contained as a constituent unit.

Examples of the aromatic vinyl monomer used in the present invention include styrene, α-methylstyrene, p-methylstyrene, pt-butylstyrene and vinyltoluene, and particularly styrene and / or α-. Methylstyrene is preferred. The diene is a compound having a conjugated double bond such as butadiene and isoprene, and butadiene is particularly preferable. Examples of vinyl cyanide monomers include acrylonitrile and methacrylonitrile, with acrylonitrile being particularly preferred.

These three structural units may be copolymerized at the same time, or two of these structural units may be polymerized in advance and then the third structural unit may be polymerized. In particular, the diene can be used as a prepolymerized diene rubber. Examples thereof include polybutadiene rubber, acrylonitrile-butadiene copolymer rubber, styrene-butadiene copolymer rubber, and polyisoprene rubber, and these can be used alone or in combination of two or more. Particularly preferably, polybutadiene rubber and / or styrene-butadiene copolymer rubber is used.

The copolymerization composition ratio is not particularly limited, but from the viewpoint of molding processability and impact resistance of the resulting copolymer, an aromatic vinyl monomer is preferably used with respect to 100 parts by weight of the copolymer. 40-75%, preferably 1 diene
It is 0 to 20%, and the vinyl cyanide monomer is preferably 15 to 40%.

The method for producing the above copolymer is not particularly limited, and known methods such as bulk polymerization, solution polymerization, bulk-suspension polymerization, suspension polymerization and emulsion polymerization can be used. In the present invention, the amount ratio of the aromatic polycarbonate resin to the copolymer is 10 to 90% by weight and 90 to 10% by weight, and preferably 30 to 70% by weight and 70 to 30% by weight, respectively. When the amount of aromatic polycarbonate resin is more than 90% by weight, the melt flowability of the resin composition is poor, while on the other hand, 10% by weight
If the amount is less, the heat distortion temperature of the molded product is too low, which is not preferable.

Further, the resin composition of the present invention contains other resins and additives such as pigments, dyes, reinforcing agents, fillers, heat-resistant agents and oxidative deterioration-preventing at the time of mixing and molding the resins as long as the physical properties thereof are not impaired. Agents, weathering agents, lubricants, release agents, crystal nucleating agents, plasticizers, fluidity improvers, antistatic agents and the like can be added. In producing the resin composition of the present invention, the respective components can be mixed by a conventionally known method. For example, a method may be selected in which each component is dispersed and mixed by a ribbon blender or a super mixer, and then melt-kneaded by an extruder or the like.

[0028]

EXAMPLES The present invention will be described below with reference to Examples and Comparative Examples. The physical properties and evaluations of the aromatic polycarbonates obtained in the following examples were measured as follows. (1) Viscosity average molecular weight (Mv) The intrinsic viscosity of a 6 g / l methylene chloride solution was measured using an Ubbelohde viscometer, and the viscosity average molecular weight was determined by the following formula.

[Equation 1] [η] = 1.23 × 10 ⁻⁴ (Mv) ^0.83

(2) Proportion (mol%) of terminal hydroxyl groups in all terminal groups 0.02 g of a sample was dissolved in 0.4 ml of deuterated chloroform and ¹ H-NMR (JNM-A manufactured by JEOL Ltd.) at 30 ° C.
1400), the number of terminal hydroxyl groups (μeq / g) and the number of terminal phenyl groups (μeq / g) were measured, and the terminal hydroxyl group concentration (mol%) was calculated by the following formula.

[Equation 2] Terminal hydroxyl group concentration (mol%) = (number of terminal hydroxyl groups /
(Number of terminal hydroxyl groups + number of terminal phenyl groups)) x 100

(3) 100 g of pellets of the moisture-resistant aromatic polycarbonate resin composition
Was subjected to a humidity resistance test for 2000 hours at 65 ° C./85% RH, and then the molecular weight of the aromatic polycarbonate resin was measured. That is, the viscosity average molecular weight before the moisture resistance test is Mv
1, when the viscosity average molecular weight after the moisture resistance test is Mv2,
The moisture resistance retention rate (%) was calculated using the following formula.

[Equation 3] Moisture resistance retention rate (%) = (Mv2 / Mv1) × 100

(4) Long-term heat aging property In a breaking elongation test according to ASTM D638, the initial breaking elongation was measured, and it was measured in a high temperature environment of 110 ° C.
The break elongation retention rate was determined by measuring the break elongation of the test piece that had been left for 400 hours.

Example 1 In a stainless steel 20 liter vertical stirring reactor equipped with a condenser, 2283 g (10.0 mol) of bisphenol A, 2356 g (11.0 mol) of diphenyl carbonate and 0.01 N sodium hydroxide as a catalyst. 0.7 ml (7 × 10 ⁻⁷ mol per 1 mol of bisphenol A) was charged and the atmosphere was replaced with nitrogen. This mixture was melted at 220 ° C. for 40 minutes to melt the raw material monomers, and then 220 ° C./1.33×10 ⁴ Pa
60 minutes, 240 ° C./2.00×10 ³ Pa for 60 minutes,
The reaction is performed at 280 ° C / 66.7 Pa for 60 minutes, and further,
2 wt ppm of butyl p-toluenesulfonate as a catalyst deactivator was added to the aromatic polycarbonate resin to terminate the reaction. As a result, the viscosity average molecular weight of 21,40
An aromatic polycarbonate resin having 0 and a terminal hydroxyl group concentration of 4% was obtained.

The obtained aromatic polycarbonate resin and A
BS resin (Mitsui Chemicals, Inc., trade name Santa Tech ET
-70) was mixed in a weight ratio of 70/30 using a blender, and then melt-kneaded with a 30 mm twin-screw extruder to form pellets. Using the obtained pellets, a moisture resistance test is performed, the moisture resistance retention rate is shown in Table 1, and a tensile test piece is prepared by injection molding, a long-term heat aging property test is performed, and the elongation at break retention rate is shown in Table 1. Show.

[Example 2] The reaction was performed in the same manner as in Example 1 except that the amount of diphenyl carbonate was changed to 2367 g (11.05 mol), and the viscosity average molecular weight was 21,300 and the terminal hydroxyl group concentration was obtained. 2% of aromatic polycarbonate resin was obtained. Further, in the same manner as in Example 1, A
Mixed with BS resin to obtain pellets. A moisture resistance test was conducted using the obtained pellets, and the moisture resistance retention rate is shown in Table 1.
Tensile test pieces were prepared by injection molding and subjected to a long-term heat aging characteristic test, and the breaking elongation retention rate is shown in Table 1.

[Example 3] The reaction was performed in the same manner as in Example 1 except that the amount of diphenyl carbonate was changed to 2378 g (11.10 mol), and the viscosity average molecular weight was 21,200 and the terminal hydroxyl group concentration was obtained. 1% of aromatic polycarbonate resin was obtained. Further, in the same manner as in Example 1, A
Mixed with BS resin to obtain pellets. A moisture resistance test was conducted using the obtained pellets, and the moisture resistance retention rate is shown in Table 1.
Tensile test pieces were prepared by injection molding and subjected to a long-term heat aging characteristic test, and the breaking elongation retention rate is shown in Table 1.

Example 4 Aromatic polycarbonate resin / ABS resin was mixed in the same manner as in Example 1 except that the aromatic polycarbonate resin and the ABS resin were mixed in a weight ratio of 50/50 using a blender. Mixed pellets of ABS resin were obtained. Using the obtained pellets, a moisture resistance test is performed, the moisture resistance retention rate is shown in Table 1, a tensile test piece is prepared by injection molding, and a long-term heat aging property test is performed.
The breaking elongation retention rate is shown in Table 1.

[Comparative Example 1] The reaction was carried out in the same manner as in Example 1 except that the amount of diphenyl carbonate was changed to 2314 g (10.80 mol), and the viscosity average molecular weight was 21,100 and the terminal hydroxyl group concentration was obtained. 10% aromatic polycarbonate resin was obtained. Furthermore, in the same manner as in Example 1,
Mixed with ABS resin to obtain pellets. A moisture resistance test was conducted using the obtained pellets, and the moisture resistance retention rate was shown in Table 1.
In addition, a tensile test piece was prepared by injection molding and subjected to a long-term heat aging property test, and the breaking elongation retention rate is shown in Table 1.

[Comparative Example 2] The reaction was carried out in the same manner as in Example 1 except that the amount of diphenyl carbonate was changed to 2271 g (10.60 mol), and the viscosity average molecular weight was 21,300 and the terminal hydroxyl group concentration was obtained. 20% of aromatic polycarbonate resin was obtained. Furthermore, in the same manner as in Example 1,
Mixed with ABS resin to obtain pellets. A moisture resistance test was conducted using the obtained pellets, and the moisture resistance retention rate was shown in Table 1.
In addition, a tensile test piece was prepared by injection molding and subjected to a long-term heat aging property test, and the breaking elongation retention rate is shown in Table 1.

[Comparative Example 3] The same procedure as in Comparative Example 1 was repeated except that the aromatic polycarbonate resin and the ABS resin were mixed in a weight ratio of 50/50 using a blender. Mixed pellets of ABS resin were obtained. Using the obtained pellets, a moisture resistance test is performed, the moisture resistance retention rate is shown in Table 1, a tensile test piece is prepared by injection molding, and a long-term heat aging property test is performed.
The breaking elongation retention rate is shown in Table 1.

[0040]

[Table 1]

[0041]

INDUSTRIAL APPLICABILITY The aromatic polycarbonate resin composition of the present invention can be used without being markedly changed in physical properties even in applications where it is exposed to high humidity and high temperature conditions.
It can extend the life of the product and contribute to safety. Therefore, it is extremely useful for various purposes and greatly contributes to the industrial world.

Claims (3)

[Claims] 1. An aromatic polycarbonate resin 1 having a viscosity average molecular weight of 12,000 or more and produced by a transesterification method.
In a resin composition containing 0 to 90% by weight and 90 to 10% by weight of an aromatic vinyl-diene-vinyl cyanide copolymer, the aromatic hydroxyl group of the aromatic polycarbonate resin is less than 5 mol% based on all the terminal groups. An aromatic polycarbonate resin composition comprising a certain aromatic polycarbonate resin. 2. The aromatic polycarbonate resin composition according to claim 1, wherein the aromatic polycarbonate resin is a resin produced by a transesterification method of an aromatic dihydroxy compound and a carbonic acid diester. 3. The aromatic polycarbonate resin is 2,2-
The aromatic polycarbonate resin composition according to claim 1, which is a resin produced by a transesterification method of bis (4-hydroxyphenyl) propane and diphenyl carbonate.