JP3471164B2 - Exterior parts for vehicles - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle exterior component made of a filler-reinforced aromatic polycarbonate resin and a thermoplastic polyester resin. More specifically, the present invention relates to a vehicle exterior component made of a filler-reinforced aromatic polycarbonate resin composition which has a good coating appearance and is further excellent in mechanical properties such as chemical resistance, fatigue properties and rigidity.

[0002]

2. Description of the Related Art A resin molded product made of an aromatic polycarbonate resin and a thermoplastic aromatic polyester resin has excellent mechanical properties, thermal properties, chemical resistance and the like, and is therefore widely used for various vehicle exterior parts.

In order to improve the rigidity of a resin composition composed of an aromatic polycarbonate resin and a thermoplastic aromatic polyester resin, a method of incorporating a fibrous filler such as glass fiber (Japanese Patent Laid-Open No. 54-94556 and Japanese Patent Laid-Open No. 94556/1994). 6-4934
No. 4), a method of blending a scale-like or plate-like inorganic filler such as talc or mica (Japanese Patent Laid-Open Nos. 55-129444 and 5-222283) is disclosed.

A resin composition comprising an aromatic polycarbonate resin and a thermoplastic aromatic polyester resin reinforced with a fibrous filler such as glass fiber and carbon fiber is
As a material with excellent mechanical properties such as chemical resistance, fatigue properties, and rigidity, it is widely used for vehicle exterior parts such as automobile door handles. However, vehicle exterior parts made of an aromatic polycarbonate resin and a thermoplastic aromatic polyester resin reinforced with a fibrous filler such as glass fiber or carbon fiber have a normal mold temperature (100 ° C or lower).
When molded with, the appearance of the fibrous filler such as glass fiber, carbon fiber, etc. is conspicuous, and if a good coating appearance is required, the coating film must be very thick. ing. Also, a vehicle exterior component made of an aromatic polycarbonate resin and a thermoplastic aromatic polyester resin reinforced with a fibrous filler such as glass fiber or carbon fiber molded at a very high mold temperature (120 ° C to 130 ° C). Has a better coating appearance than that molded at normal mold temperature with normal coating thickness,
It is not enough, but it has a problem that the molding cycle becomes long due to the extremely high mold temperature and the productivity is remarkably reduced.

On the other hand, the exterior of vehicle exterior parts formed by molding an aromatic polycarbonate resin and a thermoplastic aromatic polyester resin containing a scale-like or plate-like inorganic filler such as talc or mica has a glass fiber or carbon appearance. The appearance of a vehicle exterior part made of a resin composition containing a fibrous filler such as a fiber is better than that of the vehicle exterior part, and a vehicle exterior part having a good coating appearance can be obtained, but its reinforcing effect is small. In addition, it has a drawback that fatigue properties, chemical resistance, and mechanical properties are deteriorated.

Therefore, there has been a demand for exterior parts for vehicles which are composed of a filler-reinforced aromatic polycarbonate resin composition excellent in mechanical properties such as fatigue resistance, chemical resistance and rigidity and have a good coating appearance.

[0007]

SUMMARY OF THE INVENTION The present invention is directed to chemical resistance,
An object of the present invention is to provide an exterior part for a vehicle, which is composed of a filler-reinforced aromatic polycarbonate resin and a thermoplastic aromatic polyester resin which are excellent in mechanical properties such as fatigue properties and rigidity, and which has a good coating appearance.

The inventors of the present invention have conducted extensive studies to achieve the above object, and as a result, aromatic polycarbonate resin and
A resin composition comprising a polyethylene terephthalate resin and a polybutylene terephthalate resin, and a specific wollastonite, a specific rubbery polymer, and an olefin wax containing a carboxyl group and / or a carboxylic acid anhydride group. The inventors have found that a desired vehicle exterior component can be obtained from a product, and have reached the present invention.

[0009]

The present invention comprises 80 to 50% by weight of an aromatic polycarbonate resin (a component), a polyethylene terephthalate resin and a polybutylene terephthalate resin, and the compounding weight ratio thereof is 1/3 to 1 /. 8 to 15 parts by weight of wollastonite (component c), polyorganosiloxane rubber component and polyalkyl (100 parts by weight of the resin composition consisting of 20 to 50% by weight of the thermoplastic polyester resin (component b) of 7). Composite rubber-based graft copolymer (d) in which one or more vinyl-based monomers are graft-polymerized to a composite rubber having a structure in which they are intertwined with each other so that the (meth) acrylate rubber component cannot be separated. Component) 1 to 30 parts by weight, an olefin wax containing a carboxyl group and / or a carboxylic acid anhydride group (e component) 0.02 Be made of synthetic resin composition from 5 parts by weight it relates to the vehicle exterior component, wherein.

The aromatic polycarbonate resin (component a) used in the present invention is an aromatic polycarbonate resin having a viscosity average molecular weight of 10,000 to 100,000, preferably 15,000 to 60,000, derived from a dihydric phenol. It is usually produced by reacting a dihydric phenol with a carbonate precursor by a solution method or a melting method. The dihydric phenol used here is 2,2-bis (4-hydroxyphenyl) propane [commonly called bisphenol A], but part or all of it may be replaced with another dihydric phenol. Other dihydric phenols include, for example, bis (4-hydroxyphenyl) methane,
1,1-bis (4-hydroxyphenyl) ethane, 2,2
-Bis (4-hydroxy-3,5-dimethylphenyl)
Propane, 2,2-bis (4-hydroxy-3-methylphenyl) propane, bis (4-hydroxyphenyl)
Examples include sulfone. Examples of the carbonate precursor include carbonyl halide, carbonyl ester, haloformate and the like, and specific examples thereof include phosgene, diphenyl carbonate, dihaloformate of dihydric phenol and a mixture thereof. In producing the aromatic polycarbonate resin, an appropriate molecular weight modifier, branching agent, catalyst for accelerating the reaction and the like can be used. Two or more kinds of the aromatic polycarbonate resins thus obtained may be mixed.

If the blending ratio of the aromatic polycarbonate resin (a component) is more than 80% by weight, the chemical resistance becomes insufficient, and if it is less than 50% by weight, the mechanical strength is lowered, which is not preferable.

The thermoplastic polyester resin (component b) of the present invention comprises a polyethylene terephthalate resin and a polybutylene terephthalate resin, and the mixing weight ratio thereof is required to be 1/3 to 1/7. If the blending ratio of the polyethylene terephthalate resin and the polybutylene terephthalate resin is larger than 1/3, the chemical resistance is lowered, and if it is smaller than 1/7, the fatigue resistance is lowered, which is not preferable.

The polyethylene terephthalate resin used in the present invention usually contains terephthalic acid or its derivative,
Although it is a resin obtained by polycondensation reaction with ethylene glycol or its derivative, other dicarboxylic acids and glycols can be copolymerized within a range not impairing the object of the present invention.

The copolymerizable dicarboxylic acid includes isophthalic acid, 2-chloroterephthalic acid, 2,5-dichloroterephthalic acid, 2-methylterephthalic acid, 4,4-stilbenedicarboxylic acid and 4,4-biphenyldicarboxylic acid. , Orthophthalic acid, 2,6-naphthalenedicarboxylic acid, bisbenzoic acid, bis (p-carboxyphenyl) methane, anthracene dicarboxylic acid, 4,4-diphenyl ether dicarboxylic acid, 4,4-diphenoxyethane dicarboxylic acid, adipic acid, Sebacic acid, azelaic acid,
Dodecanedioic acid, 1,3-cyclohexanedicarboxylic acid,
1,4-cyclohexane dicarboxylic acid etc. can be mentioned. These copolymerizable dicarboxylic acids can be used alone or in admixture of two or more.

The copolymerizable glycols are 1,4
-Butanediol, 1,2-propylene glycol,
1,3-propanediol, 2,2-dimethyl-1,3
-Propanediol, trans- or cis-2,2
4,4, -Tetramethyl-1,3-cyclobutanediol, neopentyl glycol, 1,5-pentanediol, 1,6-hexanediol, 1,4-cyclohexanedimethanol, 1,3-cyclohexanedimethanol, deca Methylene glycol, cyclohexane diol, p-xylene diol, bisphenol A, tetrabromobisphenol A, tetrabromobisphenol A-bis (2-hydroxyethyl ether) and the like can be mentioned. These copolymerizable glycols can be used alone or as a mixture of two or more kinds.

The polybutylene terephthalate resin used in the present invention usually contains terephthalic acid or its derivative,
Although it is a resin obtained by polycondensation reaction with 1,4-butanediol or its derivative, other dicarboxylic acids and glycols can be copolymerized within a range not impairing the object of the present invention.

The copolymerizable dicarboxylic acid includes isophthalic acid, 2-chloroterephthalic acid, 2,5-dichloroterephthalic acid, 2-methylterephthalic acid, 4,4-stilbenedicarboxylic acid and 4,4-biphenyldicarboxylic acid. , Orthophthalic acid, 2,6-naphthalenedicarboxylic acid, bisbenzoic acid, bis (p-carboxyphenyl) methane, anthracene dicarboxylic acid, 4,4-diphenyl ether dicarboxylic acid, 4,4-diphenoxyethane dicarboxylic acid, adipic acid, Sebacic acid, azelaic acid,
Dodecanedioic acid, 1,3-cyclohexanedicarboxylic acid,
1,4-cyclohexane dicarboxylic acid etc. can be mentioned. These copolymerizable dicarboxylic acids can be used alone or in admixture of two or more.

As the copolymerizable glycol, ethylene glycol, 1,2-propylene glycol, 1,3
-Propanediol, 2,2-dimethyl-1,3-propanediol, trans- or cis-2,2,4
4, -tetramethyl-1,3-cyclobutanediol,
Neopentyl glycol, 1,5-pentanediol,
1,6-hexanediol, 1,4-cyclohexanedimethanol, 1,3-cyclohexanedimethanol, decamethylene glycol, cyclohexanediol, p-xylenediol, bisphenol A, tetrabromobisphenol A, tetrabromobisphenol A-bis (2-hydroxyethyl ether) and the like. These copolymerizable glycols alone or 2
It can also be used by mixing more than one kind.

The wollastonite (component c) used in the present invention is a natural white mineral (calcium metasilicate) having acicular crystals, and is represented by the chemical formula CaSiO ₃ , usually 50% by weight of SiO ₂ , 47% by weight of CaO, Other Fe ₂
Contains O ₃ and Al ₂ O ₃ and has a specific gravity of about 2.9.
Is. In the present invention, the wollastonite has a particle size distribution of 3 μm or more of 75% or more and 10 μm or more of 5% or less, and an aspect ratio L / D = 8 to 50, preferably 10 to 40. It is preferable. In the present invention, the particle size distribution means that after adding 5 g of wollastonite together with 5 ml of 10% sodium hexametaphosphate to a 250 ml graduated cylinder, pure water is added up to 250 ml, and a well-dispersed suspension is sucked at any suction time (t. ), Aspirating with a 10 ml hole pipette at an arbitrary aspirating position (h), transferring the aspirated suspension to an evaporating dish, and evaporating and drying the weight (w) into the following equation.

[0020]

[Equation 1]

(However, the weight of the dispersant is 0.02 g based on the weight of sodium hexametaphosphate.) The particle diameter (d) is any suction time (t), any suction position (h), and the true specific gravity of wollastonite ( It is obtained by inserting ρ _P ) into the following equation.

[0022]

[Equation 2]

This measuring method is based on the Andreazen pipette method.

The aspect ratio L / D means that the wollastonite was photographed by a scanning electron microscope, and 10 in the photograph was taken.
It is represented by the ratio of the average fiber length (L) and the average fiber diameter (D) of 0 wollastonite fibers.

The wollastonite may be surface-treated with an ordinary surface treatment agent, for example, a coupling agent such as a silane coupling agent or a titanate coupling agent. Aspect ratio is 3
If it is less than the above range, the reinforcing effect is insufficient, the chemical resistance and fatigue properties are deteriorated, and if the aspect ratio exceeds 50, the appearance of the obtained molded product is deteriorated, which is not preferable. Further, the wollastonite is a usual surface treatment agent,
For example, it is possible to use a material which has been surface-treated with a coupling agent such as a silane coupling agent or a titanate coupling agent.

The mixing ratio of wollastonite (component c) is
If the amount is more than 15 parts by weight, the mechanical strength tends to decrease, and if it is less than 8 parts by weight, the effect of improving the rigidity is insufficient, which is not preferable.

The composite rubber used in the present invention has a structure in which the polyorganosiloxane rubber component and the polyalkyl (meth) acrylate rubber component are intertwined with each other so that they cannot be separated from each other. Compound rubber graft copolymer (d)
Component) means a cyclic organosiloxane having three or more members, such as hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and a polyorganosiloxane obtained by emulsion polymerization using a crosslinking agent and / or a graft crossing agent. It can be obtained by preparing a latex of rubber and then impregnating the latex of polyorganosiloxane rubber with an alkyl (meth) acrylate monomer, a cross-linking agent and / or a graft crossing agent and then polymerizing. Examples of the alkyl (meth) acrylate monomer used here include methyl acrylate, ethyl acrylate, n-propyl acrylate,
Examples thereof include alkyl acrylates such as n-butyl acrylate and 2-ethylhexyl acrylate, and alkyl methacrylates such as hexyl methacrylate and 2-ethylhexyl methacrylate, and it is particularly preferable to use n-butyl acrylate. Vinyl-based monomers to be graft-polymerized on this composite rubber include styrene and α
-Aromatic vinyl compounds such as methylstyrene, vinyl cyanide compounds such as acrylonitrile and methacrylonitrile, methacrylic acid esters such as methyl methacrylate and 2-ethylhexyl methacrylate, acrylic acid esters such as methyl acrylate, ethyl acrylate and butyl acrylate. These may be used alone or in combination of two or more. Among them, particularly preferable ones are those commercially available from Mitsubishi Rayon Co., Ltd. under the trade names of METABLEN S-2001 or RK-120 and RK-200.

Graft polymerization of one or more vinyl monomers into a composite rubber having a structure in which the polyorganosiloxane rubber component and the polyalkyl (meth) acrylate rubber component are intertwined with each other so that they cannot be separated. When the compounding ratio of the composite rubber-based graft copolymer (d component) thus obtained is more than 30 parts by weight, rigidity and chemical resistance are deteriorated, and when it is less than 1 part by weight, the effect of improving strength is insufficient, which is preferable. Absent. The olefin wax (component e) containing a carboxyl group and / or a carboxylic acid anhydride group used in the present invention has a carboxyl group and / or a carboxylic acid anhydride group obtained by specially treating the olefin wax. It is wax. It is considered that the addition of this wax reduces the destruction of the inorganic filler due to shearing during molding, and exhibits the effect of maintaining the original aspect ratio.

The carboxyl group and the carboxylic acid anhydride group may be bonded to any part of the olefin wax, and the concentration thereof is not particularly limited, but 0.1 to 6 meq / g per 1 g of the olefin wax. Is preferred. When it is less than 0.1 meq / g, the effect of improving rigidity and impact resistance becomes insufficient, and when it is more than 6 meq / g, the thermal stability of the olefin wax itself is deteriorated, which is not preferable.

Examples of commercially available products of such olefin waxes include Diacarna-PA30 (Mitsubishi Kasei Co., Ltd.).
Made: trade name), high wax acid treatment type 2203
A, 1105A (manufactured by Mitsui Petrochemical Co., Ltd .: trade name), oxidized paraffin (manufactured by Nippon Seiro Co., Ltd.) and the like can be used, and these can be used alone or as a mixture of two or more kinds.

When the blending ratio of the olefin wax (component e) containing a carboxyl group and / or a carboxylic acid anhydride group is less than 0.02 part by weight, the effect of improving rigidity and strength is small, and when it exceeds 5 parts by weight, the appearance, It is not preferable because the mechanical strength is lowered.

The mixing ratio of wollastonite (component c) is
If the amount is more than 15 parts by weight, the mechanical strength tends to decrease, and if it is less than 8 parts by weight, the effect of improving the rigidity is insufficient, which is not preferable.

In the vehicle exterior parts of the present invention, a nucleating agent (for example, sodium stearate, ethylene-sodium acrylate, etc.), a stabilizer, etc., can be used in the preparation of the resin composition within the range that does not impair the object of the present invention. Agents (eg, phosphoric acid esters, phosphite esters, etc.), antioxidants (eg, hindered phenolic compounds, etc.), light stabilizers, colorants, foaming agents, lubricants, release agents, antistatic agents, etc. You may mix.
Also, a small amount of another thermoplastic resin may be added.

Examples of the vehicle exterior component of the present invention include a door handle for painting, a pillar, a side molding, a side protector and the like, and a door handle is particularly preferable. Each component of the resin composition is a V type blender,
Easily manufactured by any method such as injection molding, extrusion molding, compression molding or rotational molding by methods such as uniform mixing with a ribbon mixer, tumbler, etc., then melt kneading with a normal extruder, etc. and pelletizing. can do.

[0035]

EXAMPLES The present invention will be described in more detail with reference to the following examples. The evaluation was based on the following method.

(1) Surface roughness: Door handle front part (Fig. 1: outside diameter = 185 mm x 70 mm) Kansai Paint Co., Ltd. Retan PG60 was applied and dried at 80 ° C for 30 minutes, and then a universal surface Shape measuring machine (SURFCOM 3
B. E-MD-S10A: manufactured by Tokyo Seimitsu Co., Ltd., the average surface roughness (Ra) was measured under the conditions of a stylus diameter of 2 μm and a stylus pressure of 0.07 g. The coating film thickness was 45 μm.

(2) Appearance; front part of door handle (Fig. 1)
The presence or absence of defective appearance such as sink marks was visually determined. The judgment was made according to the following. ○: Defects such as sink marks are present ×: Defects such as sink marks are not present (3) Breaking strength; 23 ° C using the door handle (Fig. 1)
2 was used to pull the handle portion with a pulling jig at a pulling speed of 50 mm / s, and the load at break was measured. The judgment was made according to the following. ○ ・ ・ ・ Load at break is 120 kgf or more △ ・ ・ ・ Load at break is 120 to 80 kgf × ・ ・ ・ Load at break is less than 80 kgf (4) Rigidity; As shown, the handle was pulled with a pulling jig at F = 20 kgf, and the amount of deformation of the handle was measured. The determination was performed according to the following. ○ ・ ・ ・ 7 mm or less × ・ ・ ・ less than 7 mm (5) Chemical resistance; Metal nut (Fig. 3: Fig. 2: inner diameter = 9.5 mm, outer diameter = 16 mm) of the door handle (Fig. 1) boss. Under neck length = 8 mm, diameter = 11 mm) is preheated at 350 ° C. × 80 s or more, press-fitting speed = 10 mm / s, press-fitting holding = 7 kgf / cm ² × 3 s after press-fitting (FIG. 4), 23 ° C. × 24 hr. After adjusting the condition, apply wax remover (Yushiro Chemical Co., Ltd .: ST-210) at 23 ° C. × 24 h
After immersion under the condition of r, the presence or absence of cracks in the boss was visually determined. The judgment was made according to the following. ○: No cracks were generated ×: Cracks were generated Further, the door handle after chemical treatment was used in a 23 ° C atmosphere with a pulling jig for the handle portion as shown in Fig. 2, and the pulling speed was 50 mm / s. Was pulled and the load at break was measured. The determination was performed according to the following. ○: load at break is 120 kgf or more Δ: load at break is 120 to 80 kgf × ... load at break is less than 80 kgf (6) Durability; using door handle (Fig. 1) Fig. 2 As shown in, using a tension jig, 23 ℃ × 10kgf, 1H
A tensile endurance test was carried out under the condition of z, and the number of times until breakage was measured. The determination was performed according to the following. ○: The number of times until destruction is 100,000 times or more △: The number of times until destruction is 100,000 to 70,000 times × ... The number of times until destruction is less than 70,000 times

[Examples 1 to 17 and Comparative Examples 1 to 16] The amounts of the components shown in Table 1 and phosphorus stabilizers (cyclic neopentanetetraylbis (octadecylphosphite): Asahi Denka Kogyo) 0.1 parts by weight of PEP-8 manufactured by Co., Ltd., and a cylinder temperature of 2 by a vent type extruder having a diameter of 30 mm [VSK-30 manufactured by Nakatani Co., Ltd.].
Pelletized at 70 ° C. This pellet at 120 ℃ 5
After drying for an hour, an injection molding machine [T- manufactured by FANUC Co., Ltd.
150D], cylinder temperature 270 ° C, mold temperature 9
The door handle shown in FIG. 1 was prepared at 0 ° C., and the evaluation results are shown in Table 1.

The symbols showing the components shown in Table 1 are as follows.

(A) Aromatic polycarbonate resin Bisphenol A type polycarbonate: Panlite L-
1250; Teijin Kasei Co., Ltd., viscosity average molecular weight 25,0
00 (hereinafter referred to as PC) (B) thermoplastic aromatic polyester resin (hereinafter referred to as thermoplastic
Called Pes. ) Polybutylene terephthalate resin: TRB-H; Teijin Ltd., intrinsic viscosity 1.07 (hereinafter referred to as PBT) Polyethylene terephthalate resin: TR-8580;
Teijin Ltd., intrinsic viscosity 0.8 (hereinafter referred to as PET) (C) Inorganic filler Wollastonite: NN-4; manufactured by Tomoe Kogyo Co., Ltd., average diameter D = 4 μm, particle size distribution of 3 μm or more Is 82.5% and the particle size distribution of 10 μm or more is 0.7%, aspect ratio L / D = 20 (hereinafter referred to as W-1) glass fiber: 3PE-941; Nittobo Co., Ltd., average diameter (D) = 13 μm Aspect ratio L / D = 230 (hereinafter referred to as GF) Talc: P-3; Nippon Talc Co., Ltd. (hereinafter referred to as T) (D) Rubber polymer polyorganosiloxane component and polyalkyl ( (Meth) acrylate rubber component composite rubber having interpenetrating network structure: S-2001; manufactured by Mitsubishi Rayon Co., Ltd. (E) Olefin wax Olefin wax by copolymerization of α-olefin and maleic anhydride : Die Yakarna-PA30; manufactured by Mitsubishi Kasei Co., Ltd. (maleic anhydride content = 10% by weight) (hereinafter referred to as WAX)

[0041]

[Table 1]

[0042]

[Table 2]

[0043]

INDUSTRIAL APPLICABILITY The vehicle exterior component of the present invention has a good surface appearance, more specifically, excellent mechanical properties such as chemical resistance, fatigue properties and rigidity. Is useful for.

[Brief description of drawings]

[Figure 1] Door handle front view

[Figure 2] Door handle cross section

[Figure 3] Metal nut

[Fig. 4] Press-in drawing of metal nut

[Explanation of symbols] 1 weight 2 spring 3 pin 4 handles 5 cases 6 Tension jig 7 cushion 8 pads 9 Case boss 10 metal nuts

Front page continuation (51) Int.Cl. ⁷ identification code FI C08L 51:04 C08L 67:02 67:02 91:06 91:06) (72) Inventor Tetsuro Tanimoto 2-1, Asahi-cho, Kariya city, Aichi prefecture Aisin Seiki Co., Ltd. (72) Inventor Morito Nomura 2-1-1 Asahi-cho, Kariya City, Aichi Prefecture Aisin Seiki Co., Ltd. (72) Inventor Yoshihide Hashimoto 1-2-2 Uchisai-cho, Chiyoda-ku, Tokyo Teijin In Kasei Co., Ltd. (72) Inventor Issei Kitamura 1-2-2 Uchisaiwaicho, Chiyoda-ku, Tokyo Inside Teijin Kasei Co., Ltd. (56) Reference JP-A-7-149948 (JP, A) JP-A-7-90118 ( JP, A) JP 59-66448 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) C08L 67/00-67/02 C08L 69/00

Claims (3)

(57) [Claims] 1. An aromatic polycarbonate resin (a component)
A resin composition comprising 80 to 50% by weight and 20 to 50% by weight of a thermoplastic polyester resin (component b) which is composed of a polyethylene terephthalate resin and a polybutylene terephthalate resin and has a compounding weight ratio of 1/3 to 1/7. Wollastonite (c component) 8 to 100 parts by weight of the product
15 parts by weight, and one or more vinyl monomers in the composite rubber having a structure in which the polyorganosiloxane rubber component and the polyalkyl (meth) acrylate rubber component are intertwined with each other so that they cannot be separated. Compound rubber-based graft copolymer (d component) 1
An aromatic polycarbonate resin composition comprising 30 parts by weight and 0.02 to 5 parts by weight of an olefin wax (e component) containing a carboxyl group and / or a carboxylic acid anhydride group. Exterior parts. 2. A wollastonite (component c) having a particle size distribution of 3 μm or more is 75% or more and 10 μm or more is 5% or less, and an aspect ratio L / D = 8 to 50. A vehicle exterior component comprising the aromatic polycarbonate resin composition according to claim 1. 3. The vehicle exterior component made of the aromatic polycarbonate resin composition according to claim 1, wherein the vehicle exterior component is a vehicle door handle.