JPH10182960A - Aromatic polycarbonate resin composition, molded product thereof, and door handle for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aromatic polycarbonate resin composition having good surface glossiness and color tone when formed into a molded product, and further excellent in mechanical properties such as chemical resistance, impact strength, rigidity and the like. To provide molded products. SOLUTION: (A1) Aromatic polycarbonate resin 6
100 parts by weight of a resin composition comprising 5-45% by weight and (A2) 35-55% by weight of a thermoplastic aromatic polyester resin, (B) 1-7 parts by weight of wollastonite and (C) a carboxyl group and / or a carboxyl group A group consisting of methacrylic esters, acrylic esters and aromatic vinyl compounds in the presence of 0.1 to 7 parts by weight of an olefinic wax containing an acid anhydride group and (D) a rubber containing a repeating unit derived from butadiene; Aromatic polycarbonate resin composition comprising 1 to 30 parts by weight of an elastic copolymer obtained by copolymerizing two or more kinds of monomers selected from the group consisting of (E) and 0.05 to 5 parts by weight of an ultraviolet absorber (E) And a molded article formed from the composition and having excellent color tone and surface glossiness.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin composition comprising an aromatic polycarbonate resin and a thermoplastic aromatic polyester resin reinforced with a filler, and a molded article comprising the same. More specifically, the present invention relates to an aromatic polycarbonate resin composition having excellent rigidity, chemical resistance and impact strength, and a molded article comprising the same, which is excellent in surface glossiness and color tone.

[0002]

2. Description of the Related Art An aromatic polycarbonate resin and a thermoplastic aromatic polyester resin composition have excellent mechanical properties,
Due to its chemical resistance and thermal properties, it is widely used in various industrial fields.

In order to improve the rigidity of the resin composition, a method of blending a fibrous filler such as glass fiber (Japanese Patent Application Laid-Open No.
Japanese Unexamined Patent Publication (Kokai) No. 94556/1994 and No. 6-49344) have been proposed. However, a resin composition comprising an aromatic polycarbonate resin and a thermoplastic aromatic polyester resin reinforced with a fibrous filler such as glass fiber or carbon fiber is excellent in rigidity and chemical resistance, but has a reduced impact strength, There is also a problem that the surface appearance of a molded product obtained by floating of the product becomes poor.

Further, a method of blending scaly or plate-like inorganic fillers such as talc and mica (JP-A-55-129444).
No. JP-A-5-222283) has been proposed. The surface appearance of the molded article of the aromatic polycarbonate resin and the thermoplastic aromatic polyester resin composition containing these fillers is good with no noticeable floating of the filler. However, in order to obtain the same rigidity as a resin composition containing glass fibers and carbon fibers, the reinforcing effect is smaller than that of a resin composition containing fibrous inorganic fillers such as glass fibers and carbon fibers. Has the disadvantage that a large amount of filler has to be added, which reduces the surface glossiness. Furthermore, since the reinforcing effect is small, the chemical resistance and the mechanical strength are insufficient.

In order to solve these problems, a method of blending wollastonite, which is a fine fibrous inorganic filler, is disclosed in
149948) has been proposed. The resin composition containing wollastonite has a good surface appearance of the molded article, similarly to the case where a scaly or plate-like inorganic filler such as talc or mica is added. However, wollastonite used in the resin composition has an L / D of 6 or less, and although its reinforcing effect is recognized as compared with talc, mica, etc., it is still insufficient, and as with talc, mica, etc. If a large amount of filler is added to obtain a rigidity equivalent to that of a resin composition containing glass fibers, carbon fibers, and the like, the surface gloss decreases. Further, the chemical resistance and the mechanical strength are not sufficiently satisfactory.

Accordingly, a resin composition comprising an aromatic polycarbonate resin and a thermoplastic aromatic polyester resin having excellent mechanical properties such as rigidity, chemical resistance, impact strength and the like and providing a molded article having excellent surface appearance and surface glossiness is provided. Has been requested.

[0007]

The use of plastics in the field of automobiles, especially in exterior parts thereof, has been increasing year by year, and the use amount is said to be about 9% of the whole.
However, most of them are used for painting, and in recent years, as the demand for non-painting has increased, materials having excellent surface glossiness and color tone in addition to surface appearance as well as painting have become necessary.

The inventors of the present invention have previously disclosed, as resin compositions suitable for coating, Japanese Patent Application Nos. 7-159191 and 7-159.
192 was proposed. Since the resin composition is excellent in mechanical properties such as rigidity and chemical resistance and surface appearance, it is widely used for coating applications. However, in non-painting applications, good properties such as good surface gloss and color tone have been required.

An object of the present invention is to provide a molded article having excellent surface glossiness and color tone, and excellent mechanical properties such as rigidity and chemical resistance. It is an object of the present invention to provide an aromatic polycarbonate resin composition that gives a molded article.

The inventors of the present invention have conducted intensive studies to achieve the above object, and as a result, a composition comprising an aromatic polycarbonate resin and a specific amount of a thermoplastic aromatic polyester resin has a specific wollastonite and olefin wax. By blending a specific impact modifier and a specific ultraviolet absorber, the rigidity, chemical resistance, and impact strength were excellent, and a molded article comprising the same was found to have high gloss and color tone comparable to that of a coating. .

[0011]

According to the present invention, there are provided (A1) 65 to 45% by weight of an aromatic polycarbonate resin and (A2)
(B) Wollastonite 1 was added to 100 parts by weight of a resin composition comprising 35 to 55% by weight of a thermoplastic aromatic polyester resin.
0.1 to 7 parts by weight and (C) an olefin wax containing a carboxyl group and / or a carboxylic anhydride group
In the presence of a rubber containing 7 parts by weight and a repeating unit derived from (D) butadiene, two or more monomers selected from the group consisting of methacrylates, acrylates and aromatic vinyl compounds are copolymerized. 1 to 30 parts by weight of the obtained elastic copolymer and (E) an ultraviolet absorber 0.05
The present invention relates to an aromatic polycarbonate resin composition containing up to 5 parts by weight, and a molded article obtained by molding the resin composition.

The aromatic polycarbonate resin used as the component (A1) of the present invention has a viscosity average molecular weight derived from dihydric phenol of 10,000 to 50,000, preferably 15,000 to 40,000. Yes, it is usually produced by reacting a dihydric phenol with a carbonate precursor by a solution method or a melting method. When the viscosity average molecular weight of the aromatic polycarbonate resin is lower than 10,000, the mechanical properties are greatly reduced. When the viscosity average molecular weight exceeds 50,000, the melt viscosity increases and molding becomes difficult, which is not preferable.

Next, basic means of these manufacturing methods will be briefly described. In a reaction using, for example, phosgene as a carbonate precursor, the reaction is usually performed in the presence of an acid binder and a solvent. Examples of the acid binder include alkali metal hydroxides such as sodium hydroxide and potassium hydroxide and amino compounds such as pyridine. As the solvent, for example, halogenated hydrocarbons such as methylene chloride and chlorobenzene are used. For promoting the reaction, a catalyst such as a tertiary amine or a quaternary ammonium salt may be used. At that time, the reaction temperature is usually 0 to 40 ° C.
And the reaction time is a few minutes to 5 hours.

The transesterification reaction using carbonic acid diester as a carbonate precursor is carried out by a method in which a predetermined aromatic dihydroxy component is stirred with a carbonic acid diester while heating under an inert gas atmosphere to distill off the alcohol or phenol to be produced. Done. The reaction temperature varies depending on the boiling point of the alcohol or phenols produced, etc.
Usually, it is in the range of 120 to 300 ° C. The reaction is completed while distilling off alcohol or phenols produced by reducing the pressure from the beginning. Further, a catalyst usually used in a transesterification reaction to promote the reaction can be used. As the carbonic acid diester used in the transesterification reaction, for example, diphenyl carbonate,
Dinaphthyl carbonate, bis (diphenyl) carbonate, dimethyl carbonate, diethyl carbonate,
Dibutyl carbonate and the like. Of these, diphenyl carbonate is particularly preferred. The dihydric phenol used here is 2,2-bis (4-hydroxyphenyl) propane [usually bisphenol A], but a part or all of the dihydric phenol may be replaced by 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)
And propane and bis (4-hydroxyphenyl) sulfone. Examples of the carbonate precursor include carbonyl halide, carbonyl ester, and haloformate. Specific examples thereof include phosgene, diphenyl carbonate, dihaloformate of dihydric phenol, and a mixture thereof. In the above reaction, a molecular weight modifier, a branching agent, a catalyst for accelerating the reaction, and the like are used as necessary. Two or more aromatic polycarbonate resins thus obtained may be mixed.

The thermoplastic aromatic polyester resin used as the component (A2) is a resin obtained by a polycondensation reaction from a dicarboxylic acid or a derivative thereof and a glycol or a derivative thereof, and one or both of the dicarboxylic acid and the glycol are aromatic. It has a group.

The dicarboxylic acids include terephthalic acid, isophthalic acid, 2-chloroterephthalic acid, 2,5-dichloroterephthalic acid, 2-methylterephthalic acid, 4,4-stilbenedicarboxylic acid, 4,4-biphenyldicarboxylic acid, Orthophthalic acid, 2,6-naphthalenedicarboxylic acid, bisbenzoic acid, bis (p-carboxyphenyl) methane, anthracenedicarboxylic acid, 4,4-diphenyletherdicarboxylic acid, 4,4-diphenoxyethanedicarboxylic acid, adipine Acid, sebacic acid, azelaic acid,
Docecanedioic acid, 1,3-cyclohexanedicarboxylic acid,
Even with 1,4-cyclohexanedicarboxylic acid alone,
Two or more types can be mixed and used. Among these compounds, terephthalic acid and isophthalic acid alone or a mixture thereof are preferable.

As the 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, 1,4-butanediol, neopentyl glycol, 1,5-pentanediol, 1,6-hexanediol, 1,4-cyclohexanedimethanol, 1,3-cyclohexanedimethanol , Decamethylene glycol, cyclohexanediol, p-xylene diol, bisphenol A, tetrabromobisphenol A, tetrabromobisphenol A-bis (2-hydroxyethyl ether), etc., alone or in combination of two or more. it can. Among them, ethylene glycol, 1,4-butanediol and bisphenol A are particularly preferred.

Specific examples of the thermoplastic aromatic polyester used in the present invention include polyethylene terephthalate, polyarylate, polyethylene naphthalate, polypropylene terephthalate, polybutylene terephthalate, polyhexamethylene terephthalate, polycyclohexane dimethylene terephthalate, poly ( Ethylene terephthalate / cyclohexane dimethylene terephthalate) copolymer, poly (ethylene terephthalate / ethylene isophthalate) copolymer, poly (butylene terephthalate / butylene decadioate) polyester ether copolymer, and the like. You may use plastic aromatic polyester individually or in mixture of 2 or more types. Among these thermoplastic aromatic polyester resins, it is preferable to use polybutylene terephthalate, polyethylene terephthalate, and polyarylate alone or as a mixture of two or more.

Wollastonite used as the component (B) is a natural white mineral (calcium metasilicate) having acicular crystals, represented by the chemical formula CaSiO ₃ , and is usually S
iO ₂ 50% by weight, CaO 47% by weight, other Fe
_It contains ₂ O ₃ , Al ₂ O _3, etc. and has a specific gravity of about 2.9.
It is. The wollastonite used in the present invention preferably has a particle size distribution of 3% or more of 75% or more and 10 μm or more of 5% or less and an aspect ratio L / D of 8 to 50. If the particle size distribution is 3 μm or more and less than 75%, the reinforcing effect tends to be insufficient, and the rigidity tends to be insufficient. On the other hand, if the thickness is more than 10 μm and more than 5%, the impact strength is liable to decrease, and the surface appearance of the obtained molded product is undesirably deteriorated. If the aspect ratio is less than 8, the reinforcing effect is likely to be insufficient and the rigidity is reduced. If the aspect ratio is more than 50, the appearance of the obtained molded product is undesirably deteriorated. The wollastonite may be subjected to a surface treatment with a normal surface treatment agent, for example, a coupling agent such as a silane coupling agent or a titanate coupling agent. The particle size distribution as used herein means that 5 g of wollastonite is 10%
After adding to a 250 ml measuring cylinder together with 5 ml of sodium hexametaphosphate, pure water is added up to 250 ml, and the well-dispersed suspension is sucked with a 10 ml hole pipette at an arbitrary suction time (t) and at an arbitrary suction position (h). The aspirated suspension was transferred to an evaporating dish and evaporated to dryness.
Is substituted into the following equation [1].

[0020]

(Equation 1)

(However, the dispersant weight is 0.02 g in weight of sodium hexametaphosphate) The particle diameter (d) is an arbitrary suction time (t), an arbitrary suction position (h), and a true specific gravity of wollastonite ( ρ _P ) into the following equation [2].

[0022]

(Equation 2)

This measuring method is based on the Andreazen pipette method. The aspect ratio L / D means that wollastonite is photographed at a magnification of 1,000 times with a scanning electron microscope, and the average fiber length (L) and average fiber diameter (100) of 100 wollastonite fibers in the photograph are measured. D).

The olefin wax containing a carboxyl group and / or a carboxylic anhydride group used as the component (C) refers to a carboxyl group and / or a carboxylic anhydride group obtained by specially treating an olefin wax. It has wax. It is considered that the addition of the wax reduces the destruction of the inorganic filler due to shearing during the molding process, and exhibits an effect of maintaining the original aspect ratio. The carboxyl group or carboxylic anhydride group may be bonded to any part of the olefin wax, and the concentration thereof is not particularly limited, but is preferably in the range of 0.1 to 6 meq / g per gram of the olefin wax. If it is less than 0.1 meq / g, the effect of improving rigidity and impact resistance becomes insufficient, and if it is more than 6 meq / g, the thermal stability of the olefin wax itself deteriorates, which is not preferable.

Commercially available olefin waxes include, for example, Diacarna-DC30 (trade name of Mitsubishi Kasei Co., Ltd.), 2203A of high wax acid treatment type,
105A (trade name of Mitsui Petrochemical Co., Ltd.), paraffin oxide (trade name of Nippon Seiro Co., Ltd.) and the like, and these are used alone or as a mixture of two or more.

The elastic copolymer used as the component (D) is selected from the group consisting of methacrylates, acrylates and aromatic vinyl compounds in the presence of a rubber containing repeating units derived from butadiene. It is obtained by copolymerizing the above monomers. Examples of the rubber containing a repeating unit derived from butadiene include polybutadiene, butadiene-styrene copolymer, butadiene-acrylonitrile copolymer, and butadiene-acrylate copolymer. Examples of the methacrylate include methyl methacrylate, ethyl methacrylate, butyl methacrylate, and octyl methacrylate. Examples of the acrylate include methyl acrylate, ethyl acrylate, butyl acrylate, octyl acrylate, and the like. Examples of the aromatic vinyl compound include styrene, α-methylstyrene, p-methylstyrene, alkoxystyrene, halogenated styrene, divinylstyrene, and the like. Of these, the use of a butadiene-methacrylate-styrene copolymer is preferred.

As the ultraviolet absorber used as the component (E), benzophenone type, benzotriazole type,
Hydroquinone type, salicylic acid type and the like can be mentioned. Among these, use of a benzotriazole-based ultraviolet absorber is preferred.

Specific examples thereof include, for example, 2,2-methylenebis (4- (1,1,3,3,3-tetramethylbutyl) -6- (2H-benzotriazol-2-yl) phenol), (2-hydroxy-5-methylphenyl) benzotriazole, 2- (2-hydroxy-5-
t-octylphenyl) benzotriazole, 2- (2
-Hydroxy-3,5-bis (α, α-dimethylbenzyl) phenol) -2H-benzotriazole, 2-
(3,5-di-t-butyl-2-hydroxyphenyl)
-5-chlorobenzotriazole, 2- (3,5-di-
t-amyl-2-hydroxyphenyl) benzotriazole, of which 2,2-methylenebis (4
-(1,1,3,3-tetramethylbutyl) -6- (2
H-benzotriazol-2-yl) phenol), 2
-(2-hydroxy-5-methylphenyl) benzotriazole and 2- (2-hydroxy-5-t-octylphenyl) benzotriazole are preferable, and 2- (2-hydroxy-5-methylphenyl) benzotriazole (Seesorb 701) is preferable. : Trade name of Cipro Kasei Co., Ltd.).

The aromatic polycarbonate resin composition of the present invention comprises the above-mentioned (A1) aromatic polycarbonate resin component 6
5 to 45% by weight, preferably 60 to 50% by weight, (A
2) 35% to 55% by weight, preferably 40% to 50% by weight, of a thermoplastic aromatic polyester resin component, and 100 parts by weight of a resin composition containing (B) the wollastonite component in 1 part by weight.
7 parts by weight, preferably 3 to 6 parts by weight, (C) 0.1 to 7 parts by weight, preferably 0.3 to 7 parts by weight of an olefin wax component containing a carboxyl group and / or a carboxylic anhydride group.
To 5 parts by weight, 1 to 30 parts by weight, preferably 3 to 20 parts by weight of the elastic copolymer component (D), and 0.05 to 5 parts by weight, preferably 0.1 to 5 parts by weight of the ultraviolet absorbent (E) component. 3 parts by weight are blended.

When the blending ratio of the (A1) aromatic polycarbonate resin component is more than 65% by weight, the surface gloss is reduced, and when it is less than 45% by weight, mechanical strength such as impact strength is reduced. Absent.

(B) The mixing ratio of the wollastonite component is 1
If the amount is less than 10 parts by weight, the rigidity becomes insufficient. If the amount exceeds 7 parts by weight, the surface glossiness of the molded product is undesirably reduced.

When the compounding ratio of (C) the olefin wax component containing a carboxyl group and / or a carboxylic anhydride group is less than 0.1 part by weight, the fibrous inorganic filler in the composition is broken during molding. When the content exceeds 7 parts by weight, the appearance and the mechanical strength are undesirably reduced.

When the proportion of the elastic copolymer component (D) is less than 1 part by weight, the improvement of impact strength becomes insufficient, and when it exceeds 30 parts by weight, rigidity and chemical resistance are undesirably reduced.

(E) The compounding ratio of the ultraviolet absorbent component is 0.1%.
If the amount is less than 05 parts by weight, the effect of improving the weather resistance is small, and if it exceeds 5 parts by weight, the mechanical strength decreases, which is not preferable.

The composition of the present invention may optionally contain other additives such as a coloring agent, a metallic agent, a flame retardant, a flame retardant auxiliary,
A crystallization nucleating agent, a crystallization accelerator, a stabilizer, an antioxidant, a light stabilizer, a foaming agent, a release agent, an antistatic agent and the like may be added.

The resin composition of the present invention can be uniformly mixed with a V-type blender, tumbler, Nauter mixer or the like, and then melt-kneaded with a usual extruder or the like to form pellets. The resin composition thus obtained can be easily molded by a method such as injection molding, extrusion molding, compression molding and the like, and can also be applied to blow molding, vacuum molding and the like.

The vehicle door handle referred to in the present invention is a handle attached to an automobile door, and has specific characteristics such as impact strength of 10 kgf · cm / cm or more, glossiness of 90% or more, and weather resistance. (The color difference (ΔE) of the molded article before and after the treatment for 1000 hours under the condition of 63 ° C. and rain with a sunshine weather meter) is required to be 2 or less.

[0038]

Embodiments will be described below with reference to embodiments. The evaluation was performed by the following method. In the tables, "wt parts" and "parts by weight" indicate "wt%" and "% by weight".

(1) Gloss: 90 mm × 50 mm × 2 m
Using a square plate molded to a size of m, the measurement was performed under the condition of incident angle / light receiving angle of 60 ° according to JIS-K7105. (2) Rigidity: The flexural modulus under 23 ° C. and 80 ° C. atmosphere was measured according to ASTM D790. (3) Impact resistance: according to ASTM D256 (thickness 1
/ 8 ") The notched Izod impact strength of the test specimen was measured. (4) Chemical resistance: A tensile test specimen specified by ASTM D638 was subjected to 1% strain, and immersed in Esso regular gasoline at 30 ° C for 3 minutes. After that, the tensile strength was measured to calculate the retention, which was calculated by the following equation.

[0040]

## EQU3 ## Retention rate (%) = (strength of treated sample / strength of untreated sample) × 100 (5) Appearance: The appearance of the surface of a square plate formed into dimensions of 90 mm × 50 mm × 2 mm is visually determined. Was. In addition, when the floating of the filler etc. is not conspicuous and the surface appearance is good,
The others were marked as x. (6) Color tone: In order to check the color tone, 0.5 parts by weight of carbon black was added to the resin composition, and the resin composition was colored black and 90 mm
The hue of the square plate formed into a size of × 50 mm × 2 mm was measured using MS2020 + manufactured by Macbeth Co., Ltd., and the color depth was represented by an L value. When the L value is 28.5 or more, painting is required, so that a value of 28 or less was passed, and a value of more than 28 was rejected. (7) Weather resistance: According to JIS-K5400, the square plate obtained as described above was expressed by ΔE as a color difference of about 1000 hours under the condition of a sunshine weather meter of 63 ° C. and rain.
As a measuring device, MS2020 + manufactured by Macbeth was used.

[Example 1, Comparative Examples 1 and 2] The components shown in Table 1 were used in the amounts shown in the table and the phosphorus-based stabilizer (cyclic
Neopentanetetraylbis (octadecylphosphite): 0.1 parts by weight of PEP-8 manufactured by Asahi Denka Kogyo Co., Ltd. and carbon black (CB97 manufactured by Mitsubishi Chemical Corporation)
0) 0.5 part by weight was added and mixed by a V-type blender, and then pelletized at a cylinder temperature of 270 ° C. by a vent-type extruder having a diameter of 40 mmφ [EXT40 manufactured by Isuzu Kakohki Co., Ltd.]. When a polyarylate resin is used, a high kneading twin-screw extruder having a diameter of 30 mmφ made of a polyarylate resin alone or a polyethylene terephthalate resin and a polyarylate resin having a desired composition ratio in advance [manufactured by Nippon Steel Works, Ltd.] TEX30HSST] at 290 ° C., and the obtained pellets were used as each component.
After drying the pellets at 120 ° C. for 5 hours, a test piece was prepared at a cylinder temperature of 270 ° C. and a mold temperature of 70 ° C. using an injection molding machine [T-150D manufactured by FANUC Co., Ltd.]. Indicated.

[Examples 2 to 14, Comparative Examples 3 to 12] Table 2
And the phosphorus-based stabilizer (cyclic neopentanetetraylbis (octadecylphosphite): PEP-8 manufactured by Asahi Denka Kogyo KK)
Was added in a V-type blender, and the mixture was then mixed with a vented extruder having a diameter of 40 mm [Esuzu Kakoki Co., Ltd.
XT40] at 270 ° C. cylinder temperature. When a polyarylate resin is used, a high kneading twin-screw extruder having a diameter of 30 mmφ made of a polyarylate resin alone or a polyethylene terephthalate resin and a polyarylate resin having a desired composition ratio in advance [manufactured by Nippon Steel Works, Ltd.] TEX30HSST] at 290 ° C., and the obtained pellets were used as each component. After drying the pellets at 120 ° C. for 5 hours, an injection molding machine [F
ANUC T-150D] with a cylinder temperature of 27
Test pieces were prepared at 0 ° C. and a mold temperature of 70 ° C., and the evaluation results are shown in Tables 2 to 4.

The symbols indicating the components shown in Tables 1 to 4 are as follows. (A1) Aromatic polycarbonate resin Bisphenol A type polycarbonate [Panlite L-
1250; manufactured by Teijin Chemicals Limited, viscosity average molecular weight 25.0
00] (hereinafter referred to as PC) (A2) Aromatic polyester resin polyethylene terephthalate resin [TR-8580;
Teijin Limited, intrinsic viscosity 0.8] (hereinafter referred to as PET) Polybutylene terephthalate resin [TRB-H; Teijin Limited, intrinsic viscosity 1.07] (hereinafter referred to as PBT) Polyarylate resin [U -100; Unitika Ltd.
(Hereinafter referred to as PAR-1) 40 parts by weight of a polyethylene terephthalate resin and 60 parts by weight of a polyarylate resin are extruded at 290 ° C. using a twin-screw high-kneading twin-screw extruder (Nippon Steel Works, Ltd.). (B) Fibrous inorganic filler wollastonite [NN4; Tomoe Kogyo Co., Ltd., average diameter D
= 4 μm, aspect ratio L / D = 10] (hereinafter referred to as W) Glass fiber [3PE-941; manufactured by Nitto Boseki Co., Ltd., average diameter D = 13 μm, aspect ratio L / D = 230] (hereinafter referred to as GF) ) Talc [P-3; manufactured by Nippon Talc Co., Ltd., average particle size of about 2.8 μm] (hereinafter referred to as T) (C) Wax Olefin-based wax obtained by copolymerization of α-olefin and maleic anhydride [Diacarna -DC30, manufactured by Mitsubishi Kasei Corporation, maleic anhydride content: 10% by weight] (hereinafter referred to as W
AX) (D) Elastic copolymer MBS resin [BTA-712; Kureha Chemical Industry Co., Ltd.
(Hereinafter referred to as D-1) Ethylene-ethyl acrylate copolymer [EEA425]
0; manufactured by Nippon Petrochemical Industry Co., Ltd.] (hereinafter referred to as D-2) Composite rubber-based graft copolymer [METABLEN S-200]
1: Mitsubishi Rayon Co., Ltd.] (hereinafter referred to as D-3) (E) UV absorber Benzotriazole-based UV absorber [Seesorb UV7
01; manufactured by Cipro Kasei Co., Ltd.] (hereinafter referred to as UV absorber)

[0044]

[Table 1]

[0045]

[Table 2]

[0046]

[Table 3]

[0047]

[Table 4]

[0048]

The resin composition of the present invention has good surface gloss and color tone when formed into a molded product, and further has chemical resistance,
It is excellent in mechanical properties such as impact strength and rigidity, and is useful for various industrial applications such as automotive fields for coating applications,
Particularly, it is suitable for a door handle of an automobile.

Continued on the front page (51) Int.Cl. ⁶ Identification code FI C08L 67/02 B60J 5/04 H // (C08L 69/00 67:02 23:26 51:04)

Claims (4)

[Claims] (A1) Aromatic polycarbonate resin 6
100 parts by weight of a resin composition comprising 5-45% by weight and (A2) 35-55% by weight of a thermoplastic aromatic polyester resin, (B) 1-7 parts by weight of wollastonite and (C) a carboxyl group and / or a carboxyl group A group consisting of methacrylates, acrylates and aromatic vinyl compounds in the presence of 0.1 to 7 parts by weight of an olefinic wax containing an acid anhydride group and (D) a rubber containing a repeating unit derived from butadiene; An aromatic polycarbonate resin composition comprising 1 to 30 parts by weight of an elastic copolymer obtained by copolymerizing two or more monomers selected from the group consisting of (A) and 0.05 to 5 parts by weight of an ultraviolet absorber (E) . 2. The particle size distribution of (B) wollastonite is 3
2. The aromatic polycarbonate resin composition according to claim 1, wherein 75% or more of μm or more and 5% or less of 10 μm or more and aspect ratio L / D is 8 to 50. 3. 3. A molded article formed from the aromatic polycarbonate resin composition according to claim 1. 4. A vehicle door handle formed from the aromatic polycarbonate resin composition according to claim 1.