JP3500279B2 - Polyester resin composition and molded article thereof - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a polyester resin composition and a molded article obtained by molding the same. More specifically, the present invention has a very high surface gloss of the molded product, and by suppressing the gas generation amount, the clouding of the molding surface is small even in continuous molding, and not only an excellent appearance molded part is provided, The present invention relates to a polyester resin composition having excellent heat resistance, mechanical properties, and moldability. The resin composition of the present invention is suitably used for exterior parts in the fields of automobiles, construction, electric / electronic devices and other industries. In particular, it is excellent in surface gloss and cloudiness on the surface of the molded product in continuous molding, and is suitably used for automobile interior / exterior parts which require a good appearance.

[0002]

2. Description of the Related Art Crystalline thermoplastic polyester resins such as polyalkylene terephthalate resins are excellent in mechanical properties, electrical properties and other physical and chemical properties and have good processability. Therefore, it is used as an engineering plastic in a wide range of applications such as automobiles, electric and electronic parts. Such a crystalline thermoplastic polyester resin is used alone in various molded articles, but depending on the field of use, various reinforcing agents for the purpose of improving its properties, particularly mechanical properties,
Additives have been blended. However, especially in the field where a high appearance level and high gloss are required even in exterior parts, the addition of a fibrous reinforcing agent typified by glass fiber and carbon fiber causes a large decrease in gloss due to embossment on these molding surfaces, It is difficult to obtain a material having high gloss while maintaining heat resistance and rigidity. Further, with the polyester resin alone, due to its high crystallinity, it is difficult to obtain a sufficient mold transfer property at the time of molding, and it is difficult to obtain a satisfactory appearance. As a method of solving these problems, a method of adding an amorphous polymer or a fine powder filler such as talc or mica to a polyester resin has been proposed. From the molding surface, a method of raising the resin temperature to improve the fluidity, or a method of raising the mold temperature to delay the crystallization speed to improve the mold transfer property are generally used. Although the appearance of the molded product is improved by these methods, in the case of polyester resin, it is difficult to maintain high brightness and high gloss by causing haze on the surface of the molded product due to the adhesion of gas generated from the polymer. is there. In particular, by continuously molding, the amount of generated gas attached increases, and as a result, the appearance is impaired, and the need for post-treatment such as polishing and wiping has arisen. In addition, increasing the resin temperature and the mold temperature for improving the appearance increases the amount of generated gas and further necessitates post-treatment such as polishing and wiping. For such deterioration of appearance due to gas, use a vent-type molding machine to remove the gas at the time of plasticizing the molding, or use vacuum molding to remove the gas in the mold to improve the effect. Can be expected. However, there is a limit to the correspondence with these molding machines, increasing the molding cycle,
Since there is a problem such as an increase in cost, it is desired to deal with it by ordinary injection molding. Therefore, there has been a demand for the development of a material having a low gloss, a high gloss, and a good appearance from the viewpoint of the material.

[0003]

In view of the above problems, the inventors of the present invention have made extensive studies in order to obtain a resin composition having excellent gloss in a polyester resin molded product.
The inventors have found that a composition obtained by using a specific polyester resin in combination with a polycarbonate resin and an inorganic filler having a specific average particle diameter is extremely effective, and completed the present invention. That is, the present invention relates to (A) a polyester resin mainly composed of an aromatic dicarboxylic acid or an aliphatic dicarboxylic acid and an aliphatic diol, the terminal of which is substituted with a monofunctional compound having a carboxyl group or a hydroxyl group. A polyester resin having a hydroxyl end group content of 40 meq / kg or less (B) 5 to 80 parts by weight of a polycarbonate resin, and (C) 5 to 50 parts by weight of an inorganic filler having an average particle size of 0.05 to 30 μm. The present invention relates to a polyester resin composition having a very good appearance of a molded product.

[0004]

BEST MODE FOR CARRYING OUT THE INVENTION The constituent components of the resin material of the present invention will be described in detail below. First, the features of the present invention are
As polyester resin, the amount of hydroxyl end groups is 40 meq /
The point is to use less than kg. The polyester resin used in the present invention has an aromatic dicarboxylic acid or an aliphatic dicarboxylic acid and an aliphatic diol as main constituent elements, and the terminal thereof is substituted with a monofunctional compound having a carboxyl group or a hydroxyl group to give a hydroxyl group in the resin. It was manufactured so that the amount of end groups was 40 meq / kg or less.
As the raw material monomer forming the main skeleton of the polyester resin, in addition to such dicarboxylic acid and diol, it is also possible to use their ester-forming derivatives. Here, specific examples of the aromatic dicarboxylic acid, the aliphatic dicarboxylic acid and their ester-forming derivatives include terephthalic acid, isophthalic acid, phthalic acid, naphthalenedicarboxylic acid, biphenyldicarboxylic acid, stilbenzylcarboxylic acid, 2,2- (Biphenylcarboxyphenyl) propane, succinic acid, adipic acid, sebacic acid, dodecanedicarboxylic acid and the like and ester-forming derivatives thereof, such as alkyl ester and the like. Further, specific examples of the aliphatic diol include ethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,6-hexanediol, diethylene glycol, triethylene glycol, cyclohexanedimethanol and the like. In the present invention, a polyester resin obtained by copolymerizing other components with the above-mentioned dicarboxylic acid and diol as the main constituents may be used. In the present invention, among the polyester resins as described above, a polybutylene terephthalate-based resin containing terephthalic acid and butanediol as main constituents, and a polybutylene naphthane containing naphthalenedicarboxylic acid and butanediol as main constituents are particularly preferable. The effect of terminal substitution with a specific monofunctional compound described below is remarkable with respect to the phthalate resin, and the generated organic gas containing tetrahydrofuran as a main component can be significantly reduced.

Next, the monofunctional compound having a carboxyl group or a hydroxyl group for substituting the terminal of the polyester resin is not particularly limited, but in the case of a compound having a low molecular weight, the polymer terminal may be changed depending on the temperature during the polyester production, the reduced pressure condition and the like. It is preferable that the monofunctional compound is a compound having 7 or more carbon atoms, because the monofunctional compound easily volatilizes without being introduced into the system and flows out of the system. Examples of particularly preferred compounds include benzoic acid, toluic acid, tert-butylbenzoic acid, derivatives of aromatic carboxylic acids such as naphthoic acid and their alkyl esters, or high molecular weight alcohol compounds such as phenoxybenzyl alcohol. is there. In the present invention, a polyester having a hydroxyl terminal group content of 40 meq / kg or less, preferably 20 meq / kg or less, which is obtained by quantifying a polyester resin sample polymerized from the above-mentioned monomer and monofunctional compound by H-NMR, is used. When the amount of terminal carboxyl groups exceeds 40 meq / kg, the effect of reducing the amount of generated gas is not sufficient.

Such polyester resin, for example, terminates polymerization in a molten state at a stage of an intrinsic viscosity of 0.1 to 0.5 dl / g,
Once cooled and solidified to obtain an intermediate polymer, the intermediate polymer can be obtained by a method of solid-phase polymerization at 180 to 210 ° C., and an intrinsic viscosity of 0.53 dl / g or more and 1.2 dl / g or less, preferably Is less than 1.0 dl / g. Intrinsic viscosity is 0.53dl / g
When it is less than 1, the mechanical strength is low, while when it exceeds 1.20 dl / g, the moldability tends to be poor, and both are not preferable. Here, the intrinsic viscosity is a value when a 0.5% O-chlorophenol solution is measured at 25 ° C.

Further, the effect of reducing the generated organic gas is recognized regardless of the amount of terminal carboxyl groups of the component (A) polyester resin used in the present invention, but the lower the amount of terminal carboxyl groups is, the more preferable is 30 meq / kg. The following range is particularly preferable.

Next, in the present invention, (B) polycarbonate resin is added to (A) polyester resin. this
The polycarbonate resin (B) improves the appearance of the molded product by being added and blended with the polyester resin (A). In particular, since the polycarbonate resin is amorphous, it has the effect of reducing the crystallization rate and improving the mold transfer property by adding and blending it with the polyester resin. In addition, since the shrinkage rate of the polycarbonate resin itself is small, it also has the effect of suppressing the sink mark phenomenon of the molded product. From the above two viewpoints, the addition of the polycarbonate resin is essential in the present invention in order to obtain a good appearance product. The polycarbonate resin used for such a purpose is a solvent method, that is, in the presence of a known acid acceptor and a molecular weight modifier in a solvent such as methylene chloride,
It can be produced by a reaction between a dihydric phenol and a carbonate precursor such as phosgene, or a transesterification reaction between a dihydric phenol and a carbonate precursor such as diphenyl carbonate. Examples of the dihydric phenol that can be preferably used here include bisphenols, and 2,2-bis (4-hydroxyphenyl) propane, that is, bisphenol A is particularly preferable. Further, a part or all of phenol A may be replaced with another dihydric phenol. Examples of the dihydric phenol other than bisphenol A include hydroquinone, 4,4-dihydroxydiphenyl, bis (4-hydroxyphenyl) alkane, bis (4-hydroxyphenyl) cycloalkane,
Bis (4-hydroxyphenyl) sulfide, bis (4
-Hydroxyphenyl) sulfone, bis (4-hydroxyphenyl) sulfoxide, compounds such as bis (4-hydroxyphenyl) ether, or bis (3,5-dibromo-4-hydroxyphenyl) propane, bis (3,5-
Mention may be made of halogenated bisphenols such as dichloro-4-hydroxyphenyl) propane. These dihydric phenols may be homopolymers or copolymers of two or more dihydric phenols. Further, the polycarbonate resin used in the present invention may be a thermoplastic random branched polycarbonate obtained by reacting a polyfunctional aromatic with a dihydric phenol and / or a carbonate precursor. The polycarbonate used in the present invention is particularly preferably highly fluid. The amount of the polycarbonate resin (B) added is 5 to 80 parts by weight, preferably 10 to 40 parts by weight, based on 100 parts by weight of the component (A). If it is too small, it is not possible to obtain a good appearance targeted by the present invention due to poor transferability,
On the other hand, if it is too large, molding problems such as an increase in molding cycle and deterioration of mold releasability occur, which is not preferable.

Next, in the present invention, (C) the average particle diameter is 0.05 to 30 μm as an essential component for obtaining a molding material having high mechanical strength and heat resistance, and maintaining high gloss and high brightness.
m inorganic filler is used. The particle size of the component (C) defined in the present application includes the particle size after preparation of the composition. The inorganic filler used here has an average particle size of 0.05.
There is no particular limitation as long as it is about 30 μm.
Preferably, talc, mica, kaolin, wollastonite, glass beads, glass flakes, zinc sulfide, lithopone, calcium sulfate and barium sulfate are selected from one or a combination of two or more, and particularly preferably talc, These are mica, kaolin, wollastonite, glass beads and glass flakes. More preferably talc,
It is mica. Further, it is desirable to use talc having a bulk specific gravity of 0.5 or more that has been subjected to a compression process for low gasification gas generation. The average particle size of the inorganic filler (C) is in the range of 0.05 to 30 μm, particularly preferably 1 to 10 μm. If the particle size is too large, a good appearance cannot be obtained, and if it is too small, handling becomes a problem during addition and strength is reduced. The amount of the inorganic filler (C) added is 5 to 50 parts by weight, preferably 5 to 30 parts by weight, based on 100 parts by weight of the (A) polyester resin. If the amount of the inorganic filler added is less than 5% by weight, heat resistance and rigidity cannot be sufficiently obtained, and a high brightness feeling cannot be obtained. On the other hand, if the amount exceeds 50 parts by weight, it is difficult to obtain a good appearance and it becomes difficult to perform operability such as extrusion.

As described above, (A) polyester resin is mixed with (B) polycarbonate resin, and
(C) By adding an inorganic filler, the obtained polyester resin composition has extremely small amount of generated gas, and the surface of the obtained molded article has very excellent gloss and brightness, and Even if continuously molded, the generated gas is less attached to the surface of the molded product, and it is possible to maintain high brightness and gloss.

Further, to the composition of the present invention, a known substance generally added to a thermoplastic resin or the like can be added and used in combination in order to impart desired properties depending on its purpose.
For example, it is possible to add any of antioxidants, ultraviolet absorbers, stabilizers such as light stabilizers, antistatic agents, lubricants, release agents, colorants such as dyes and pigments, and plasticizers. In particular, it is effective to add an antioxidant and a release agent for improving heat resistance. Among them, the addition of phosphorus stabilizer is (A)
The effect of suppressing the transesterification reaction between the polyester resin and the (B) polycarbonate resin is high, and it can be said that the addition is essential for maintaining the thermal stability. Organophosphite compounds are mainly suitable, and specific examples thereof include bis (2,6-di-t-4methylphenyl) pentaerythritol diphosphite,
Examples thereof include bis (2,4-di-t-butylphenyl) pentaerythritol diphosphite and tetrakis (2,4-di-t-butylphenyl) -4,4′-biphenylenephosphite. The amount of phosphorus stabilizer used here is (A)
The amount is 0.001 to 2.0 parts by weight, more preferably 0.1 to 1.0 part by weight, based on 100 parts by weight of the polyester resin. If it is less than 0.001 part by weight, the desired effect will not be exhibited and the addition amount will be 2.0.
If the amount is more than parts by weight, the effect of the gas derived from the additive becomes large, and it is difficult to obtain a molding material having good gloss and brightness. Further, the phosphorus-based stabilizer is effectively used in combination with an antioxidant represented by hindered phenols in the sense that the thermal stability is further enhanced.

The composition of the present invention can be easily prepared by the equipment and method generally used as the conventional resin composition preparation method. For example, (1) a predetermined amount of components constituting the composition of the present invention are collectively mixed and melt-kneaded with a uniaxial or biaxial extruder to obtain pellets having a target composition. (2) A single-screw or twin-screw extruder having two or more raw material input ports, the resin, stabilizer, pigment component, etc. are input from the first input port, melted and kneaded, and then the second raw material input port. Add more inorganic filler, melt and knead to obtain pellets of the target composition,
And so on. As a molding method for filling the resin into the mold, there are an injection molding method, an injection compression molding method, and the like, but the injection molding method is general.

[0013]

EXAMPLES The present invention will now be described in detail with reference to examples, but the present invention is not limited thereto. In addition, the measuring method of the characteristic evaluation shown in the following examples is as follows. Gas Generation Measurement Method Using pellets composed of the compositions of Tables 2 to 4, ASTM tensile test pieces were prepared by injection molding, and crushed pieces were used as samples. A 5 g sample was taken and left in a head space of 20 ml at 150 ° C. for 1 hour, and then the generated gas was measured by a gas chromatograph. The weight of the generated gas is shown in ppm with respect to the weight of the sample. The measurement conditions are shown below. Equipment: HP5890A Column: HR-1701, 0.32 mm diameter x 30 m Column temperature: 50 ° C (1 minute) → 5 ° C / min → 250 ° C Detector: FID surface gloss Flat plate (80 mm x 80 mm x 3 mm thickness) under the following conditions 45 degree by a digital variable angle gloss meter (UGV-40 manufactured by Suga Test Instruments Co., Ltd.) in accordance with JIS K7105 gloss measurement.
The glossiness at 45 degree reflection was measured. Molding machine: Sumiju 150t Molding condition: Nozzle C1 C2 C3 C4 Cylinder temperature (℃) 260 260 250 240 220 Injection speed 3.6m / min Holding pressure 400kg / cm ² Mold temperature 90 ℃ Using a flat plate with the same image clarity, JIS According to H8686, the image clarity at 45 ° reflection was measured with an image clarity measuring device (ICM-1D manufactured by Suga Test Instruments Co., Ltd.). Initial rigidity The flexural modulus was measured according to ASTM D-790, and this was taken as the initial rigidity. Surface Appearance The surface condition of the above-mentioned molded product (flat plate) was visually observed and the following points were given. 1; It has a high glossy feeling and the fluorescent lamp is clearly reflected without distortion.
Little fogging due to continuous molding; high gloss, but some fogging. Clouding due to gas occurs in continuous molding 3; traces of flow marks due to gas are seen in the first molding shot 4; transfer failure occurs and sufficient surface appearance cannot be obtained.
Or, the surface is rough, and high gloss cannot be obtained [Synthesis method of resin] The polyester resin (A
-1 to A-4) will be described more specifically, but the present invention is not limited thereto.

Production Example 1 (A-1) 2178 g of dimethyl terephthalate, 1415 butanediol
g, tetrabutyl titanate 1.25 g, and p-tert-butylbenzoic acid 81.5 g were charged into a reaction vessel equipped with a stirrer and a rectification column. Transesterification and esterification were performed while heating from 140 ° C to 200 ° C over 90 minutes. At this time, methanol and water reached about 90% of the theoretical amount. Here, the outflow route was switched from the rectification tower to the direct cooling tower connected to the vacuum pump, and the pressure was gradually reduced while raising the temperature from 200 ° C to 250 ° C and reached 0.5 torr in about 40 minutes. The polymerization reaction was carried out at 250 ° C. and 0.5 torr for 2 hours, and the polymer was taken out and pelletized. The IV of this polymer was 0.34 dl / g.
This was subjected to solid phase polymerization for 30 hours under a nitrogen stream at 200 ° C. to obtain a polymer A-1. The IV of the obtained polymer is 0.56 dl
/ g, the amount of hydroxyl end groups was 14 meq / kg, and the amount of carboxyl end groups was 26 meq / kg. Production Example 2 (A-2) Dimethyl terephthalate 2178 g, butanediol 1415
g, tetrabutyl titanate 1.25 g, and p-tert-butylbenzoic acid 18.4 g were charged in a reaction vessel equipped with a stirrer and a rectification column. Transesterification and esterification were performed while heating from 140 ° C to 200 ° C over 90 minutes. At this time, methanol and water reached about 90% of the theoretical amount. Here, the outflow route was switched from the rectification tower to the direct cooling tower connected to the vacuum pump, and the pressure was gradually reduced while raising the temperature from 200 ° C to 250 ° C and reached 0.5 torr in about 40 minutes. The polymerization reaction was carried out for 2 hours at 250 ° C. and 0.5 torr, and the polymer was taken out and pelletized. The IV of this polymer was 0.50 dl / g.
This was subjected to solid phase polymerization for 30 hours under a nitrogen stream at 200 ° C. to obtain a polymer A-2. The IV of the obtained polymer was 0.86 dl
/ g, the amount of hydroxyl end groups was 15 meq / kg, and the amount of carboxyl end groups was 46 meq / kg. Production Example 3 (A-3) Dimethyl terephthalate 2178 g, butanediol 1415
g, tetrabutyl titanate 1.25 g, and p-tert-butylbenzoic acid 89.1 g were charged into a reaction vessel equipped with a stirrer and a rectification column. Transesterification and esterification were performed while heating from 140 ° C to 200 ° C over 90 minutes. At this time, methanol and water reached about 90% of the theoretical amount. Here, the outflow route was switched from the rectification tower to the direct cooling tower connected to the vacuum pump, and the pressure was gradually reduced while raising the temperature from 200 ° C to 250 ° C and reached 0.5 torr in about 40 minutes. The polymerization reaction was carried out at 250 ° C. and 0.5 torr for about 2 hours, and the polymer was taken out and pelletized. The IV of this polymer was 0.30 dl / g. This was subjected to solid phase polymerization for 30 hours under a nitrogen stream at 200 ° C. to obtain a polymer A-3. The IV of the obtained polymer is
At 0.56 dl / g, the amount of hydroxyl end groups was 12 meq / kg and the amount of carboxyl end groups was 16 meq / kg. Production Example 4 (A-4) 2232 g of dimethyl naphthalate, 1153 g of butanediol,
Tetrabutyl titanate (1.25 g) and p-tert-butylbenzoic acid (65.5 g) were placed in a reaction vessel equipped with a stirrer and a rectification column. Transesterification and esterification reaction were performed while heating from 140 ° C to 220 ° C over 90 minutes. At this time, methanol and water reached about 90% of the theoretical amount. Here, the outflow route was switched from the rectification tower to the direct cooling tower connected to the vacuum pump, and the pressure was gradually reduced while raising the temperature from 220 ° C to 260 ° C and reached 0.5 torr in about 30 minutes. The polymerization reaction was carried out at 260 ° C. and 0.5 torr for 1 hour and 30 minutes, and the polymer was taken out and pelletized. The IV of this polymer was 0.50 dl / g.
This was subjected to solid phase polymerization for 30 hours under a nitrogen stream at 200 ° C. to obtain a polymer A-4. The IV of the obtained polymer is 0.57 dl
The amount of hydroxyl end groups was 13 meq / kg, and the amount of carboxyl end groups was 38 meq / kg at / g. Reference Examples 5 to 8 (A'-1 to 4) Using the same reaction vessel as in Production Example 1, melt polymerization was performed under the conditions for producing a normal polyester from a dicarboxylic acid derivative and an aliphatic diol, to obtain a resin. If necessary, the resin obtained by this melt polymerization at 200 ° C under a nitrogen atmosphere,
Solid phase polymerization was performed to set the resin to a desired degree of polymerization.

Examples 1 to 12 and Comparative Examples 1 to 12 Using polyester resins having the properties shown in Table 1,
The materials of the examples shown in Table 1 and the comparative examples shown in Table 3 were prepared and their characteristics were evaluated. [Production Method of Pellets] A predetermined amount of (B), (C) and a phosphorus-based stabilizer were added to the polyester resin as the component (A), and the components were uniformly mixed with a V blender. 30 mm of this resulting mixture
Using a φ twin-screw extruder, the mixture was melt-mixed at a barrel temperature of 260 ° C., and the strand discharged from the die was cooled and cut to obtain pellets. The components (C) and the phosphorus-based stabilizer used are as follows. Inorganic filler (C) (C-1): Fine talc with an average particle size of 1.6 μm (C-2): Fine particle mica with an average particle size of 6 μm (C-3): Particulate mica with an average particle size of 24 μm (C -4): Kaolin (C'-1) having an average particle size of 1.5 μm: Mycarin-based stabilizer having an average particle size of 80.0 μm: bis (2,6-di-t-4methylphenyl) pentaerythritol diphosphite

[0016]

[Table 1]

[0017]

[Table 2]

[0018]

[Table 3]

[0019]

As described above, the polyester resin composition of the present invention is a polyester resin which is substituted with a monofunctional compound having a carboxyl group or a hydroxyl group at the terminal and has a hydroxyl terminal group amount of 40 meq / kg or less and a polycarbonate resin. By blending the resin and adding a predetermined inorganic filler, it has very little gas generation, has high gloss and high brightness, and maintains a good appearance with little fog on the molding surface even in continuous molding. It also has excellent heat resistance, mechanical strength, and moldability. The molded product obtained from this resin composition is suitably used for automobile interior / exterior products which require high gloss and good appearance.

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-6-172503 (JP, A) JP-A-4-91126 (JP, A) JP-A-3-93831 (JP, A) JP-A-55- 7874 (JP, A) JP-A-52-87134 (JP, A) JP-A-50-126040 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) C08G 63/00-63 / 91 C08L 67/00-67/02

Claims (9)

(57) [Claims] 1. A polyester resin comprising (A) an aromatic dicarboxylic acid or an aliphatic dicarboxylic acid and an aliphatic diol as main components, the terminal of which is substituted with a monofunctional compound having a carboxyl group or a hydroxyl group,
Polyester resin having hydroxyl end groups of 40 meq / kg or less 100 parts by weight (B) 5 to 80 parts by weight of polycarbonate resin, and (C) 5 to 50 parts by weight of inorganic filler having an average particle size of 0.05 to 30 μm Composition. 2. The polyester resin (A) is a polybutylene terephthalate resin whose main constituents are terephthalic acid and butanediol, or a polybutylene naphthalate whose main constituents are naphthalenedicarboxylic acid and butanediol. The polyester resin composition according to claim 1, which is a resin. 3. The polyester resin composition according to claim 1, wherein the monofunctional compound is an organic compound having a carboxyl group or a hydroxyl group and having 7 or more carbon atoms. 4. The monofunctional compound is benzoic acid, toluic acid,
The polyester resin composition according to any one of claims 1 to 3, which is a compound selected from tert-butylbenzoic acid, naphthoic acid, phenoxybenzyl alcohol and derivatives thereof. 5. The polyester resin composition according to any one of claims 1 to 4, wherein the polyester resin (A) has a carboxyl end group content of 30 meq / kg or less. 6. The polyester resin composition according to claim 1, wherein the inorganic filler (C) is talc, mica, kaolin, wollastonite, glass beads or glass flakes. 7. The inorganic filler (C) has an average particle size of 1 to 10 μm.
The polyester resin composition according to any one of claims 1 to 6. 8. A polycarbonate resin (B) is added in an amount of 15 to 15.
The polyester resin composition according to claim 1, which is 40 parts by weight. 9. An automobile interior / exterior component having an excellent appearance, which is obtained by molding the polyester resin composition according to claim 1. Description: