JP6010403B2 - Resin composition and molded article for light reflecting component - Google Patents

Description

  The present invention relates to a resin composition and a molded body for a light reflecting component.

  Conventionally, thermosetting resins such as unsaturated polyester resin, bulk molding compound (BMC), or aluminum materials have been widely used as materials used for resin parts that reflect light, such as parts around automobile lamps. Has been. Thermosetting resins are superior in that they are lighter than aluminum materials, but still require further weight reduction because their specific gravity exceeds 2.0. In addition, thermosetting resins also have specific problems such as complicated post-processing operations of the molded body and contamination of the working environment due to dust and the like. Therefore, as materials used for resin parts that reflect light, conversion of materials from thermosetting resins and aluminum materials to thermoplastic resins such as polyetherimide and high heat-resistant polycarbonate that can be directly deposited on aluminum. Is progressing. However, even these thermoplastic resins are still insufficient in terms of light weight, and materials with a lower specific gravity are desired in consideration of environmental and energy saving aspects.

  Polyphenylene ether resin has excellent properties such as mechanical properties, electrical properties, acid resistance, alkali resistance, heat resistance, low specific gravity, low water absorption, and good dimensional stability. ing. Therefore, polyphenylene ether resins are widely used as materials for home appliances, OA equipment, office machines, information equipment, automobiles, and the like. Even in the case of light reflection molding applications requiring high heat resistance and rigidity, there is a demand for a resin composition designed with a higher ratio of polyphenylene ether resin in the future. In such applications, good molding fluidity, extremely high light reflection characteristics, and direct aluminum vapor deposition are often required, and a molded article made of a polyphenylene ether resin composition is good. The surface appearance and brightness are expected.

  As a method for improving the heat resistance and mechanical properties of a thermoplastic resin containing a polyphenylene ether resin, a method of adding an inorganic filler such as glass fiber, carbon fiber, mica or talc is generally used. However, in the above method, the surface gloss of the molded article obtained even with the addition of a small amount of inorganic filler is significantly impaired. Therefore, the resin composition obtained by the above method is extremely difficult to apply in the use of light reflecting parts.

  As a method for imparting impact resistance to a polyphenylene ether resin, rubber-reinforced polystyrene (HIPS) is widely used. However, in the above method, as in the case where the inorganic filler described above is added, even if a small amount of rubber-reinforced polystyrene is blended, the brightness of the resulting molded product tends to be impaired. For this reason, it is difficult to apply the resin composition obtained by the above method to the use of a light reflecting component that places importance on the surface appearance of the molded body.

  On the other hand, the polyphenylene ether resin composition containing no inorganic filler or HIPS has a seemingly good surface appearance of a molded article. However, a resin composition containing a relatively high concentration of polyphenylene ether has an infinite number of white spots on the surface of the molded body after aluminum deposition (a diameter of 30 μm or more generated during molding due to fine gas escape peculiar to the polyphenylene ether resin composition). Therefore, it is not necessarily sufficient as a material for applications in which the appearance is more important.

  Patent Document 1 includes (A) a polyphenylene ether, (B) a copolymer containing an aromatic vinyl compound and an unsaturated dicarboxylic imide derivative as constituent monomers, and having a weight average molecular weight in a specific range; C) A thermoplastic resin composition containing an aromatic vinyl compound and a copolymer containing a vinyl cyanide compound as constituent monomers in a specific ratio is described. This thermoplastic resin composition is typically a blend of a specific styrene-phenylmaleimide copolymer resin or the like instead of the polystyrene or the like conventionally blended with a polyphenylene ether resin. Higher heat resistance and better balance between molding fluidity and low outgassing.

  Patent Document 2 describes an automobile lamp extension molded body containing a resin composition containing 50 to 95% by mass of polyphenylene ether (A) and having a specific gravity.

International Publication No. 2009/0600917 International Publication No. 2012/070592

  The resin composition described in Patent Document 1 contains a specific styrene-phenylmaleimide copolymer resin and a specific styrene-acrylonitrile resin (AS resin) component, so that it has high heat resistance, good flow, and low outgas. Although an effect is seen in the property, when aluminum deposition is performed, white spots may occur at a level unacceptable for use in light reflecting parts such as an automobile lamp extension. Outgas is a decomposition gas that gradually generates from the molded body and causes fogging of the lens under the usage environment (high temperature condition of about 150 ° C. or higher) after the resin molded body is incorporated as a lamp peripheral part of an automobile. On the other hand, vitiligo is the result of solidification of the remaining traces (deformations) of the gas components generated by the decomposition of the resin during the molding of the molded body, and it remains on the surface of the molded body for comparison. The one that stands out (diameter 30 μm or more). Thus, outgas and vitiligo are problems that occur under different conditions, and even if the low outgassing property is improved, the vitiligo state is not necessarily good.

  On the other hand, in the case of the molded article described in Patent Document 2, the white spots are surely reduced and the molded appearance after aluminum deposition is improved. On the other hand, in the resin composition that is the raw material of the molded article, The thermal stability at the time of molding may not be sufficient. In recent years, light-reflecting parts have been increasingly reduced in thickness and weight. When molding such a light-weight light-reflective component, it is not uncommon for the resin composition as a raw material to remain in a molding machine cylinder or a mold hot runner at a high temperature for a relatively long time. . If the thermal stability of the resin composition is not sufficient, the molding under such conditions promotes thermal decomposition of the resin composition, and as a result, the resulting molded product has new appearance defects such as surface silver generation. There is a fear, and it is not necessarily sufficient as a light reflecting component.

  Therefore, the present invention provides a resin composition and a molded article for light-reflecting parts, in which the occurrence of silver on the surface of the molded body is suppressed under high temperature retention molding conditions while at the same time reducing white spots on the surface of the molded body after aluminum deposition. The purpose is to provide.

  The present inventors have intensively studied to solve the above problems. As a result, 60 to 95% by mass of polyphenylene ether and 15 to 1% by mass of styrene-acrylonitrile resin (hereinafter also referred to as “AS resin”) having an acrylonitrile (hereinafter also referred to as “AN”) content of 16 to 45% by mass. By using a resin composition containing 39 to 3% by mass of AS resin having an AN content of 5 to 11% by mass, even if there is little white spots on the surface of the molded article after aluminum deposition, and high-temperature residence molding The present invention has been completed by finding that silver is hardly generated on the surface of the molded body.

That is, the present invention is as follows.
[1]
60 to 95% by mass of polyphenylene ether (A),
Styrene-acrylonitrile resin (AS resin) (B) 15-1% by mass with an acrylonitrile (AN) content of 16-45% by mass,
Styrene-acrylonitrile resin (AS resin) (C) 39-3 mass% of acrylonitrile (AN) content 5-11 mass%,
Contain,
The component containing the component (B) is present as dispersed particles in the resin composition, and the average particle size of the dispersed particles is in the range of 0.05 to 1.8 μm.
Resin composition.
[2]
The resin composition according to [1], further containing 1 to 25 parts by mass of a styrene-based thermoplastic elastomer (D) with respect to 100 parts by mass of the total amount of the components (A), (B), and (C). .
[ 3 ]
The molded object for light reflection components containing the resin composition as described in [1] or [2] .
[ 4 ]
[ 3 ] A light reflecting component comprising the light reflecting component molded body according to [ 3 ] and an aluminum vapor deposition film covering at least a part of the light reflecting component molded body.
[ 5 ]
An automotive lamp extension molded article comprising the resin composition according to [1] or [2] .

  According to the resin composition of the present invention, there is very little white spots on the surface of the molded product after aluminum deposition, and the molded product with excellent surface appearance after aluminum deposition can be obtained by suppressing the occurrence of silver in high temperature retention molding. . The molded article can be favorably used for molded articles for light reflecting parts such as automobile lamp reflectors and lamp extension molded articles.

  Hereinafter, a mode for carrying out the present invention (hereinafter referred to as “the present embodiment”) will be described in detail. In addition, this invention is not limited to the following embodiment, It can implement by changing variously within the range of the summary.

<Resin composition>
The resin composition according to the present embodiment is
50 to 95% by mass of polyphenylene ether (A),
AS resin (B) 15-1 mass% of AN content 16-45 mass%,
AS resin (C) 39-3 mass% of AN content 5-11 mass%,
Is a resin composition containing

  The inventors of the present invention have an extremely small white spot on the surface of the molded article after aluminum deposition, and also have a molded article excellent in staying molding stability at high temperatures and excellent in aluminum vapor deposition appearance. I found out. Hereinafter, each component of the above resin composition will be described in detail.

<Polyphenylene ether (A)>
The reduced viscosity of polyphenylene ether (hereinafter also referred to as “PPE”) (A) used in the present embodiment is preferably in the range of 0.25 to 0.55 dl / g, more preferably 0.25 to 0.45 dl / g. g, more preferably 0.30 to 0.42 dl / g, and particularly preferably in the range of 0.30 to 0.40 dL / g. The reduced viscosity of the polyphenylene ether (A) is preferably 0.25 dl / g or more from the viewpoint of sufficient mechanical properties of the resin composition, and 0.55 dl from the viewpoint of the moldability of the resin composition and the brightness feeling of the molded body. / G or less is preferable. In the present embodiment, the reduced viscosity is a value obtained by measuring with a 0.5 g / dl solution at 30 ° C. using a chloroform solvent.

The polyphenylene ether (A) is a homopolymer having a repeating unit of [a] or [b] of the following formula (1) and the structural unit consisting of [a] or [b] of the general formula (1). Or a copolymer (copolymer).

  In [a] and [b] of the above formula (1), R1, R2, R3, R4, R5 and R6 are each independently an alkyl group having 1 to 4 carbon atoms and an aryl group having 6 to 12 carbon atoms. And monovalent residues such as halogen and hydrogen. However, in this case, the case where R5 and R6 are simultaneously hydrogen is excluded. Further, the alkyl group preferably has 1 to 3 carbon atoms, the aryl group has more preferably 6 to 8 carbon atoms, and more preferably hydrogen among the monovalent residues. The number of repeating units in [a] and [b] in (1) is not particularly limited because it varies depending on the molecular weight distribution of the polyphenylene ether (A).

  The homopolymer of polyphenylene ether (A) is not limited to the following, and examples thereof include poly (2,6-dimethyl-1,4-phenylene) ether and poly (2-methyl-6-ethyl-1,4- Phenylene) ether, poly (2,6-diethyl-1,4-phenylene) ether, poly (2-ethyl-6-n-propyl-1,4-phenylene) ether, poly (2,6-di-n-) Propyl-1,4-phenylene) ether, poly (2-methyl-6-n-butyl-1,4-phenylene) ether, poly (2-ethyl-6-isopropyl-1,4-phenylene) ether, poly ( 2-methyl-6-chloroethyl-1,4-phenylene) ether, poly (2-methyl-6-hydroxyethyl-1,4-phenylene) ether and poly (2-methyl-6-) Roroechiru-1,4-phenylene) ether. Among these, poly (2,6-dimethyl-1,4-phenylene) ether is preferable from the viewpoint of easy availability of raw materials and processability.

  The copolymer of polyphenylene ether (A) is not limited to the following, but for example, a copolymer of 2,6-dimethylphenol and 2,3,6-trimethylphenol, 2,6-dimethylphenol and o- Examples thereof include those mainly composed of a polyphenylene ether structure such as a copolymer of cresol and a copolymer of 2,3,6-trimethylphenol and o-cresol. Among them, a copolymer of 2,6-dimethylphenol and 2,3,6-trimethylphenol is preferable from the viewpoint of easy availability of raw materials and processability, and 2,6-dimethylphenol from 90 to 70 from the viewpoint of improving physical properties. A copolymer of 10% by mass and 2,30,6-trimethylphenol is more preferable.

  Polyphenylene ether (A) may be used individually by 1 type, and may be used together 2 or more types. Further, the polyphenylene ether (A) may contain other various phenylene ether units as a partial structure as long as it does not affect the reduction of vitiligo. Such a phenylene ether unit is not limited to the following. For example, 2- (dialkylaminomethyl) -6-methylphenylene ether described in JP-A-01-297428 and JP-A-63-301222 is used. Units and 2- (N-alkyl-N-phenylaminomethyl) -6-methylphenylene ether units.

  A small amount of diphenoquinone or the like may be bonded to the main chain of the polyphenylene ether. Further, a part or all of the polyphenylene ether is substituted with an acyl functional group and at least one selected from the group consisting of carboxylic acid, acid anhydride, acid amide, imide, amine, orthoester, hydroxy and ammonium carboxylate. A functionalized polyphenylene ether may be obtained by reacting (modifying) with a functionalizing agent.

  The ratio (Mw / Mn value) of the weight average molecular weight Mw and the number average molecular weight Mn of the polyphenylene ether (A) is preferably 2.0 to 5.5, more preferably 2.5 to 4.5, More preferably, it is 3.0-4.5. The Mw / Mn value is preferably 2.0 or more from the viewpoint of molding processability of the resin composition, and preferably 5.5 or less from the viewpoint of mechanical properties of the resin composition.

  The weight average molecular weight Mw and the number average molecular weight Mn are obtained from the polystyrene-equivalent molecular weight.

  The residual volatile content of the polyphenylene ether (A) is preferably 0.3% by mass (3000 ppm) or less, more preferably 0.1% by mass (1000 ppm) or less from the viewpoint of improving the surface appearance of the molded article. Here, the polyphenylene ether (A) having a residual volatile content of 0.3% by mass or less is not limited to the following, but is preferably produced by adjusting the drying temperature and drying time after polymerization of the polyphenylene ether, for example. it can. As said drying temperature, 40-200 degreeC is mentioned, for example, Preferably it is 80-180 degreeC, More preferably, it is 120-170 degreeC. The drying temperature is preferably 40 ° C. or higher from the viewpoint of drying efficiency, and is preferably 200 ° C. or lower from the viewpoint of seizure due to melting and prevention of deterioration.

  Examples of the drying time include 0.5 to 72 hours, preferably 2 to 48 hours, and more preferably 6 to 24 hours. When the residual volatile matter of the polyphenylene ether (A) is to be removed in a relatively short time, it is preferable to dry the polyphenylene ether (A) at a high temperature. In such a case, in order to prevent deterioration due to heat, drying in a nitrogen atmosphere or drying with a vacuum dryer is preferable.

  In order to reduce the residual volatile content of the polyphenylene ether (A) to 0.3% by mass or less by drying after the polymerization, the polymerization is not adversely affected, the environment is hardly adversely affected, and the boiling point is relatively low. It is preferable to perform polymerization using a polymerization solvent that is easy to volatilize in advance. Although it does not restrict | limit as a polymerization solvent below, For example, toluene is mentioned. More specifically, after polymerizing a polyphenylene ether having a reduced viscosity within the above range by a known polymerization method, the resulting polymer is sufficiently dried using a vacuum dryer or the like, thereby remaining. A polyphenylene ether having a volatile content within the above range can be produced. In addition, even if it uses things other than the above-mentioned preferable polymerization solvent, the polyphenylene ether whose residual volatile matter is in the said range can be manufactured by fully drying.

  The content of the polyphenylene ether (A) is in the range of 60 to 95% by mass, preferably in the range of 70 to 90% by mass, and more preferably 70 to 85% by mass in 100% by mass of the resin composition. %. The content of polyphenylene ether (A) is 60% by mass or more from the viewpoint of heat resistance, suppresses generation of decomposition gas due to high resin processing temperature, and solidifies the resin surface in the molding die. Is 90% by mass or less from the viewpoint of sufficiently maintaining the appearance and brightness of the molded body.

  The content of polyphenylene ether (A) can also affect the number of vitiligo on the molded body. Since polyphenylene ether (A) has a relatively high Tg, the smaller the content of polyphenylene ether (A) in the resin composition, the more solidified the resin composition on the surface of the molded body when obtaining a molded body from the resin composition. The speed becomes slow (because it is diluted with the AS resin (C) component having a low Tg and Tg is lowered). When the solidification rate of the resin composition on the surface of the molded body is delayed, the time for which the surface of the molded body is held in a plasticized state becomes longer, and when white spots (the traces generated by gas escaping) are pressed against the mold The trace of the crater shape will be crushed in a soft state. As a result, it is considered that it is difficult to leave a mark on the molded body and a molded body with a small number of white spots can be obtained. As will be described later, it is considered that the solidification rate of the resin on the surface of the molded body is delayed even when a resin such as AS resin (B) having a lower Tg than the PPE-containing matrix is finely dispersed in the resin composition. .

<AS resin (B)>
The resin composition according to the present embodiment suppresses the occurrence of silver during high temperature retention molding, and sufficiently reduces white spots generated on the surface of the molded body, from the viewpoint of improving the molded body surface appearance. 16-45 mass% AS resin (B) is contained 15-1 mass% with respect to 60-95 mass% of polyphenylene ether (A). Content of AS resin (B) becomes like this. Preferably it is 13-2 mass%, More preferably, it exists in the range of 12-3 mass%. The content of the AS resin (B) is 15% by mass or less from the viewpoint of peeling of the molded body and productivity of the resin composition, and is 1% by mass or more from the viewpoint of sufficient vitiligo reduction.

  The AN content of the AS resin (B) is selected from the range of 16 to 45% by mass, preferably in the range of 18 to 40% by mass, and more preferably in the range of 20 to 35% by mass. The AN content of the AS resin (B) is 16% by mass or more from the viewpoint of sufficient vitiligo reduction, and is 45% by mass or less from the viewpoint of maintaining thermal stability during high temperature retention molding.

  The AS resin (B) preferably has a melt flow rate (MFR) measured at 220 ° C. under a load of 10 kg within a range of 1 to 50 g / 10 minutes, more preferably 4 to 40 g / 10 minutes, and even more preferably. 8-30 g / 10 min. The MFR of the AS resin (B) is preferably 1 g / 10 min or more from the viewpoint of molding fluidity, and preferably 50 g / 10 min or less from the viewpoint of miscibility in the resin composition.

  The AS resin (B) is incompatible with the polyphenylene ether (A), and preferably forms a dispersed phase in the resin composition according to the present embodiment. On the other hand, the AS resin (C) described below is compatible with the polyphenylene ether (A), but when used in combination with the AS resin (B), part of the AS resin (B) and the component (A) It is thought to act as an admixture.

  As the AS resin (B) is present in a specific amount in the resin composition and further dispersed with an appropriate particle size, the contact surface of the resin composition injected into the molding die with the mold surface is solidified. The speed is reduced, and the traces caused by the outflow of gas on the resin surface are pressed against the mold surface in a softened state before solidification, making it difficult for the traces to remain on the molded body surface, resulting in white spots on the molded body surface. It is thought that the number of

  When only the AS resin (B) is blended in the resin composition without using the AS resin (C), the interfacial adhesion between the matrix resin and the AS resin (B) as the dispersed phase becomes insufficient. The AS resin (B) is not sufficiently mixed in the resin composition, and there is a tendency for delamination to occur in the molded product. That is, it is considered that blending a specific amount of the AS resin (C) in the resin composition contributes to the compatibility between the polyphenylene ether (A) and the AS resin (B).

  When the resin composition according to the present embodiment contains the component (B), the resin solidification rate of the resin surface layer portion (near the mold contact surface) in the molding step is compared with the case where the component does not contain the component (B). As a result, the white spots of the resulting molded product can be reduced. However, when the component (C) is not contained, or when the content of the component (B) is too large, the effect of reducing white spots can be obtained, but delamination tends to occur in the molded product, which is a practical problem. easy. In the resin composition according to the present embodiment, the miscibility of the component (B) is improved by appropriately adjusting the content of the component (B) and the component (C), and the component (B) is appropriately resinated. Finely dispersed in the composition, the effect of suppressing delamination in the molded body and reducing vitiligo can be obtained.

  By adding the AS resin (C), the miscibility of the component (B) is improved, and the component (B) is appropriately finely dispersed in the resin composition, whereby the retention molding stability is also improved. The component (B) has higher thermal stability than the component (C) and general-purpose polystyrene (GPPS), but if the miscibility of the component (B) is not sufficient in the resin composition, silver ( Resulting from improper mixing).

  The component containing the AS resin (B) is present as dispersed particles in the resin composition, and the average particle diameter of the dispersed particles is preferably in the range of 0.05 to 1.8 μm, more preferably It exists in the range of 0.1-1.5 micrometers, More preferably, it exists in the range of 0.2-1.0 micrometer. The average particle diameter of the dispersed particles is preferably 0.05 μm or more from the viewpoint of sufficient vitiligo reduction of the molded body, and preferably 1.8 μm or less from the viewpoint of peeling of the molded body and productivity of the resin composition.

  The dispersed particles can be confirmed by observing the extruded pellet of the resin composition or the core of the molded product with a transmission electron microscope. Further, the average particle diameter of the dispersed particles is a long diameter passing through the center of gravity of each of the dispersed particles randomly extracted using a photograph of the dispersed particles magnified 10,000 to 50,000 times with a transmission electron microscope. The minor axis can be measured and obtained from the arithmetic mean.

  In the resin composition of the present embodiment, as a method for controlling the average particle diameter of the dispersed particles to the specific range, the content of the component (B) relative to the component (A) is set to the specific range, and further described below. (C) The method of containing a specific amount of component is mentioned.

<AS resin (C)>
The resin composition of the present embodiment moderately improves the miscibility of the AS resin (B) in the resin composition, and also improves the molding fluidity and mold transferability of the resin composition. From the viewpoint of improving the surface appearance, the AS resin (C) having an AN content of 5 to 11% by mass contains 39 to 3% by mass with respect to 60 to 95% by mass of the polyphenylene ether (A). The AS resin (C) content is preferably 35 to 3% by mass, more preferably 30 to 5% by mass. The content of the AS resin (C) is 39% by mass or less from the viewpoint of maintaining sufficient heat resistance of the resin composition, and 3% by mass from the viewpoint of improving the molding fluidity of the resin composition and the appearance of the molded body. That's it.

  The AN content of the AS resin (C) is selected from a range of 5 to 11% by mass, preferably 7 to 10% by mass, and more preferably 8 to 10% by mass. The AN content of the AS resin (C) is 5% by mass or more and 11% by mass or less from the viewpoint of improving the miscibility of the component (B) in the resin composition.

  The AS resin (C) preferably has a melt flow rate (MFR) measured at 220 ° C. under a load of 10 kg within a range of 5 to 100 g / 10 minutes, more preferably 30 to 80 g / 10 minutes, and still more preferably. 40-60 g / 10 min. The MFR of the AS resin (C) is preferably 5 g / 10 min or more from the viewpoint of molding fluidity of the resin composition, and preferably 100 g / 10 min or less from the viewpoint of maintaining sufficient mechanical properties of the resin composition.

<Styrenic thermoplastic elastomer (D)>
From the viewpoint of improving impact resistance, the resin composition of the present embodiment further contains styrene-based thermoplastic elastomer (D) with respect to 100 parts by mass of the total amount of components (A), (B), and (C). And it is preferable to contain in the ratio of 1-25 mass parts. The content of the styrenic thermoplastic elastomer (D) is more preferably 1 to 20 parts by mass, still more preferably 100 parts by mass of the total amount of the components (A), (B) and (C). It is in the range of 2 to 15 parts by mass.

  From the viewpoint of imparting sufficient impact resistance to the resin composition, the content of the styrenic thermoplastic elastomer (D) is 100 parts by mass with respect to the total amount of the components (A), (B) and (C). 1 mass part or more is preferable and 25 mass parts or less are preferable from a viewpoint of sufficient heat resistance of a resin composition, and rigidity maintenance.

  The styrene-based thermoplastic elastomer (D) is a hydrogenated product of a block copolymer having a styrene block and a conjugated diene compound block (hereinafter also referred to as “styrene block-conjugated diene compound block copolymer”). . The conjugated diene compound block is preferably hydrogenated at a hydrogenation rate of at least 50% from the viewpoint of thermal stability. The hydrogenation rate is more preferably 80% or more, and still more preferably 95% or more.

  Styrenic thermoplastic elastomer (D) may be used individually by 1 type, and may be used together 2 or more types.

  Examples of the conjugated diene compound block include, but are not limited to, polybutadiene, polyisoprene, poly (ethylene-butylene), poly (ethylene-propylene), and vinyl-polyisoprene. The said conjugated diene compound block may be used individually by 1 type, and may be used in combination of 2 or more type.

  The arrangement of the repeating units constituting the block copolymer may be a linear type or a radial type. In addition, the block structure constituted by the polystyrene block and the rubber intermediate block (conjugated diene compound block) may be any of two types, three types, and four types. Among these, from the viewpoint that the resin composition of the present embodiment can sufficiently exhibit a desired effect, preferably, three types of linear block block weights composed of a polystyrene-poly (ethylene-butylene) -polystyrene structure are used. It is a coalescence. The conjugated diene compound block may contain butadiene units within a range not exceeding 30% by mass.

  In the resin composition of the present embodiment, it is also possible to use a functionalized styrene thermoplastic elastomer obtained by introducing a functional group such as a carbonyl group or an amino group into a styrene thermoplastic elastomer. . The carbonyl group is introduced by modification with an unsaturated carboxylic acid or a functional derivative thereof. Examples of unsaturated carboxylic acids or functional derivatives thereof include, but are not limited to, for example, maleic acid, fumaric acid, itaconic acid, halogenated maleic acid, cis-4-cyclohexene-1,2-dicarboxylic acid, and Endo-cis-bicyclo [2,2,1] -5-heptene-2,3-dicarboxylic acid, and anhydrides, ester compounds, amide compounds and imide compounds of these dicarboxylic acids, as well as acrylic acid and methacrylic acid, and These monocarboxylic acid ester compounds and amide compounds may be mentioned. Among these, maleic anhydride is preferred from the viewpoint of maintaining the surface appearance of the molded body and imparting impact resistance.

  The amino group is introduced by reacting an imidazolidinone compound or a pyrrolidone compound with a styrene-based thermoplastic elastomer.

  In the resin composition of the present embodiment, a styrene-conjugated diene compound block having a bound styrene content of 45 to 80% by mass from the viewpoint of improving the gloss of the molded product, imparting further impact resistance, and preventing delamination of the molded product. It preferably contains a hydrogenated product of a copolymer.

<Others>
From the viewpoint of improving the thermal stability of the resin composition and the surface appearance and brightness of the molded product, the resin composition of the present embodiment further contains a thermal stabilizer having a melting point of 180 ° C. or higher (A), ( It is preferable to contain in the ratio of 0.01-1 mass part with respect to 100 mass parts of total amounts of B) and (C) component. The content of the heat stabilizer is more preferably 0.1 to 0.5 parts by mass, further preferably 100 parts by mass of the total amount of the components (A), (B) and (C). It is in the range of 0.2 to 0.5 parts by mass. The content of the heat stabilizer is preferably 0.01 parts by mass or more with respect to 100 parts by mass of the total amount of the components (A), (B) and (C), from the viewpoint of sufficient improvement in the appearance of the molded product. 1 part by mass or less is preferable.

  The melting point of the heat stabilizer is 180 ° C. or higher, preferably 200 to 310 ° C., and more preferably 220 to 270 ° C. As the heat stabilizer, a hindered phenol-based or phosphorus-based heat stabilizer is preferable from the viewpoint of suppressing thermal decomposition of the resin. Specific examples of the hindered phenol-based heat stabilizer are not limited to the following. For example, tris (2,4-di-tert-butylphenyl) phosphite, 3,3 ′, 3 ″, 5,5 ′, 5 "-hexa-tert-butyl-a, a ', a"-(mesitylene-2,4,6-triyl) tri-p-cresol, 1,3,5-tris (3,5-di-tert- Butyl-4-hydroxybenzyl) -1,3,5-triazine-2,4,6 (1H, 3H, 5H) -trione, etc. Specific examples of the phosphorus-based heat stabilizer are not limited to the following. Are, for example, bis (2,4-dicumylphenyl) pentaerythritol diphosphite, 3,9-bis (2,6-di-tert-butyl-4-methylphenoxy) -2,4,8,10- Tetraoxa-3,9 Jihosufapiro [5,5], and undecane.

  It is preferable that the resin composition of this Embodiment does not contain the inorganic filler as a reinforcing agent as much as possible from the viewpoint of maintaining the brightness of the molded body. The inorganic filler as the reinforcing agent is generally used for reinforcing a thermoplastic resin, and examples thereof include glass fiber, carbon fiber, glass flake, talc, mica and the like.

  The resin composition of the present embodiment preferably does not contain a crystalline polymer as much as possible from the viewpoint of maintaining the brightness of the molded body. Examples of the crystalline polymer include polyamide, polypropylene, polyethylene, polyphenylene sulfide, polyacetal, polyethylene terephthalate, polybutylene terephthalate, and liquid crystal polymer.

  The resin composition of the present embodiment has a specific gravity of 1. from the viewpoint of the balance between the environmental load reduction merit due to weight reduction and the material design that retains sufficient performance (heat resistance, mechanical strength, appearance of molded body, etc.). It is preferably in the range of 00 to 1.12, more preferably in the range of 1.04 to 1.10, and still more preferably in the range of 1.05 to 1.08.

  In the resin composition or molded product of the present embodiment, the qualitative and quantitative determinations of the components (A), (B), (C) and other components are performed by separation / extraction operations using a solvent or high performance liquid chromatography ( It is possible by analysis using HPLC.

  Specifically, for example, each component can be qualitatively and quantitatively determined by the following method. First, the resin composition is dissolved in chloroform, and insoluble matters such as inorganic substances are separated by filtration or a centrifuge. Next, about 3 times the amount of methanol is added to the chloroform solution to reprecipitate the polymer component, and the polymer component containing the components (A), (B) and (C), and any component (D) is added as an additive, etc. Separated from soluble components. After the polymer component is dried, it is dissolved in dichloromethane heated to 50 ° C. to obtain a solution. Thereafter, the solution is left in a freezer at −30 ° C. for 24 hours to precipitate and separate component (A), and after drying, this is quantified. Next, about 3 times the amount of methanol is added to the dichloromethane solution containing the components (B), (C) and (D) to precipitate the polymer components containing the components (B), (C) and (D). After drying the precipitated polymer component, the components (B) and (C) are dissolved in acetone and the insoluble (D) component is separated by filtration. The acetone solution containing the components (B) and (C) is dried to volatilize acetone, and the dried polymer components containing the components (B) and (C) are quantified.

  The dried polymer component containing the components (B) and (C) is dissolved in tetrahydrofuran and subjected to high performance liquid phase chromatography (for example, HPLC manufactured by Shimadzu Corporation, column: silica-based cyanopropyl-treated product, developing solvent: tetrahydrofuran / n- The composition ratio of the component (B) and the component (C) is determined by heptane), and the components (B) and (C) are quantified. Using a standard sample whose AN content (% by mass) is known in advance by nitrogen analysis, a calibration curve for the relationship between the AN content and the retention time is prepared. The measurement sample can be separated by HPLC (detector: 254 nm ultraviolet light), and the composition ratio can be obtained from the peak retention time and the peak area ratio.

[Production method of resin composition]
The resin composition of the present embodiment can be produced by melting and kneading raw materials such as the component (A), the component (B), and the component (C). The conditions for melt kneading with the component (A), the component (B), and the component (C) for producing the resin composition are not particularly limited.

  From the viewpoint of stably obtaining a large amount of a resin composition that can sufficiently exhibit the desired effect of the present embodiment, it is preferable to use a twin screw extruder. As an example, a TEM58SS twin screw extruder (manufactured by Toshiba Machine Co., Ltd., barrel number 13, screw diameter 58 mm, L / D = 53); kneading disk L: 2, kneading disk R: 14 and kneading disk N : A screw pattern having two), when the cylinder temperature is 270 to 330 ° C., the screw rotation speed is 150 to 500 rpm, and the vent vacuum is 11.0 to 1.0 kPa, the component (A), (B) The method of melt-kneading raw materials, such as a component and said (C) component, is mentioned.

  It should be noted that the resin composition of the present embodiment is produced using a large-sized (screw diameter of 40 to 90 mm) twin screw extruder, and the component (A) generated during extrusion into the extruded resin pellets. It is that the gel and carbides which arise from the contamination. The mixed gel or carbide may cause a decrease in the surface appearance and brightness of the molded body. Therefore, it is preferable to introduce the component (A) from the most upstream (top feed) raw material inlet and set the oxygen concentration inside the shooter at the uppermost inlet to 15% by volume or less. The oxygen concentration is more preferably 8% by volume or less, and still more preferably 1% by volume or less.

  The oxygen concentration is adjusted by sufficiently substituting the inside of the raw material storage hopper with nitrogen, sealing the feed line from the raw material storage hopper to the raw material inlet of the extruder so that there is no air going in and out of the feed line, and then feeding the nitrogen. It is possible by adjusting the amount and adjusting the opening of the vent hole.

≪Molded body for light reflecting parts≫
The molded body for light reflecting component of the present embodiment includes the above-described resin composition.

  The molded body for light reflecting component of the present embodiment can be obtained by molding the above resin composition. The molding method of the molded article for light reflecting parts is not limited to the following, but preferably includes, for example, injection molding, extrusion molding, vacuum molding and pressure molding, and particularly from the viewpoint of molding appearance and brightness, injection molding is preferred. More preferably used.

  Examples of the molded body for light reflecting parts of the present embodiment include light source reflecting parts such as projectors and various lighting fixtures, automobile lamp reflector parts, automobile lamp extension parts, and the like. Among these, an automobile lamp reflector molded body and an automotive lamp extension molded body are preferable, and an automotive lamp extension molded body is particularly preferable.

  Here, the automobile lamp extension molded body is a relatively large light reflecting part that exists between a reflector, which is a light reflecting part behind the light source beam of the headlight of the automobile, and the lamp front cover. Automotive lamp extension molded products do not require heat resistance as high as that of reflectors, but have a good brightness on the glossy surface of the molded product, surface appearance after aluminum deposition, sufficient balance between heat resistance and molding fluidity, and light weight The property (being a low specific gravity material) is required at a higher level.

  The molding temperature is, for example, selected from the range of cylinder set temperature (maximum temperature part) of 270 to 350 ° C, preferably 280 to 340 ° C, more preferably 290 to 330 ° C, and even more preferably 300 to 320 ° C. The molding temperature is preferably 270 ° C. or higher from the viewpoint of sufficient molding fluidity, and preferably 350 ° C. or lower from the viewpoint of the thermal stability of the resin composition.

  It is preferable that the average thickness of the molded body for light reflecting parts of the present embodiment is selected from the range of 0.8 to 3.2 mm. The average thickness is more preferably 1.0 to 2.5 mm, still more preferably 1.2 to 2.0 mm, and particularly preferably 1.2 to 1.5 mm. The average thickness is preferably 3.2 mm or less from the viewpoint of lightness, and is preferably 0.8 mm or more from the viewpoint of sufficient moldability and strength retention.

  The molded body for the light reflecting component of the present embodiment is molded using a mirror surface mold that has been polished with diamond paste or the like to a very small level (average surface roughness of 0.2 μm or less). It is preferred that # 1000 or more is preferable, # 2000 or more is more preferable, and # 5000 or more is particularly preferable. From the viewpoint of sufficient mirror appearance, the polishing count is preferably # 1000 or more.

  The gloss value of the mirror surface portion of the molded article for light reflecting parts of the present embodiment is a material that retains sufficient reflectivity of light emitted from the light source and sufficient physical properties (heat resistance, mechanical strength, appearance of molded article, etc.) From the viewpoint of balance with design, it is preferably in the range of 90 to 140% when measured at a measurement angle of 20 °. The gloss value is more preferably in the range of 90 to 140%, and still more preferably in the range of 100 to 140%.

≪Light reflection parts≫
The light reflecting component of the present embodiment includes the above-described molded body for a light reflecting component and an aluminum vapor deposition film that covers at least a part of the molded body for a light reflecting component.

<Aluminum deposition film>
The aluminum vapor-deposited film can be formed, for example, by subjecting a part or all of the surface of the molded body to an aluminum vapor deposition process after the above-described molded body for light reflecting parts is molded. As a method for providing an aluminum vapor deposition film on the above-described molded body for light reflecting parts, there are a vacuum vapor deposition method, an ion plating method and a sputtering method, but the vacuum vapor deposition method is general and preferable. Since the adhesion of the aluminum film can be improved by activating the surface of the molded body before the aluminum vapor deposition, it is preferable to perform plasma treatment in advance on the molded body for the light reflecting component described above. In addition, it is preferable to coat the silicon dioxide polymer film on the surface of the molded body after aluminum deposition by plasma polymerization in order to prevent the appearance and brightness from being lowered due to oxidation or the like.

  In the light reflecting component of the present embodiment, the thickness of the aluminum vapor deposition film is preferably in the range of 50 to 500 nm, more preferably 100 to 300 nm, and still more preferably 100 to 200 nm. The film thickness of the aluminum vapor deposition film is preferably 50 nm or more from the viewpoint of imparting sufficient light reflection characteristics.

In the molded article for light reflecting component according to the present embodiment, the number of white spots (referring to protrusions having a crater-like depression having a diameter of 30 μm or more) existing within a fixed area of 52.4 mm ² of the mirror surface portion is good. From the viewpoint of maintaining the appearance of the molded product, the number is preferably 30 or less. More preferably, it is 20 or less, More preferably, it is 15 or less, Especially preferably, it is 10 or less.

  Hereinafter, the present embodiment will be described more specifically with reference to examples and comparative examples, but the present embodiment is not limited to only these examples. The measurement methods and raw materials of physical properties used in Examples and Comparative Examples are shown below.

[Measurement method of physical properties]
1. Number of vitiligo (projections having crater-like depressions with a diameter of 30 μm or more) The obtained resin composition pellets were dried in a hot air dryer at 120 ° C. for 3 hours. The resin composition after drying was subjected to cylinder injection by an injection molding machine (IS-80EPN, manufactured by Toshiba Machine Co., Ltd.) equipped with a film gate mirror mold having a size of 100 mm × 100 mm × 2 mm with the mold surface polished to # 5000. A molded flat plate was obtained by molding at a temperature of 320 ° C., a mold temperature of 120 ° C., an injection pressure (gauge pressure of 70 MPa), and an injection speed (panel set value) of 85%. Furthermore, the obtained shaped flat plate is placed in a vacuum deposition apparatus, an inert gas and oxygen are introduced into the device, the inside of the chamber is brought into a plasma state, and plasma treatment is performed to activate the shaped flat plate surface. Then, aluminum was deposited on the formed flat plate in a vacuum deposition apparatus. Furthermore, as a protective film for the aluminum deposition surface, plasma polymerization treatment was performed to form a silicon dioxide polymer film. The aluminum film thickness was 80 nm and the silicon dioxide film thickness was 50 nm. A 40 × magnified photograph was taken with a digital microscope (model: VHX1000, manufactured by Keyence Corporation) at the center of the aluminum vapor deposition surface of the formed flat plate (hereinafter also referred to as “aluminum vapor deposition flat plate”) on which this aluminum vapor deposition was performed. Divide the total number of projections having crater-like depressions with a diameter of 30 μm or more existing in one field of view (area: 52.4 mm ² ) for all five mirror-formed flat plates by dividing it by 5, The average number per hit was calculated. The average number was defined as the number of vitiligo.
As an evaluation standard, it was determined that the smaller the number of vitiligo, the more suitably usable in this application.

2. Appearance of aluminum deposition surface of molded flat plate (visual)
The aluminum vapor deposition surface of the aluminum vapor deposition flat plate produced by said method was observed visually, and it evaluated according to the following ranks.
≪Rank≫
A: Visible with no visual observation and very good appearance.
○: Visible with almost no white spots visually, good appearance.
Δ: A lot of vitiligo is observed and slightly conspicuous.
In the above ranks, it was determined that ◎ and ○ can be used more suitably in this application.

3. Fluidity (MFR)
The obtained pellets of the resin composition were dried in a hot air dryer at 120 ° C. for 3 hours. About the resin composition after drying, the melt flow rate (MFR) was measured at a cylinder set temperature of 280 ° C. and a load of 10 kg using a melt indexer (P-111, manufactured by Toyo Seiki Seisakusho).
As an evaluation standard, it was determined that the higher the MFR, the more advantageous the material design in this application.

4). Deflection temperature under load (DTUL)
The pellets of the resin composition were dried in a hot air dryer at 120 ° C. for 3 hours. The resin composition after drying was molded by an injection molding machine (IS-80EPN, manufactured by Toshiba Machine Co., Ltd.) equipped with an ISO physical property test piece mold to obtain a dumbbell molded piece of ISO 3167, a multipurpose test piece A type. The molding conditions were set as follows: cylinder temperature 320 ° C., mold temperature 120 ° C., injection pressure 70 MPa (gauge pressure), injection speed 200 mm / sec, injection time / cooling time = 20 sec / 20 sec. The obtained molded piece was cut, and the deflection temperature under load (DTUL) was measured at 1.82 MPa in accordance with ISO75 using a test piece of 80 mm × 10 mm × 4 mm.
As an evaluation standard, it was determined that the higher the DTUL value, the more advantageous the material design for this application.

5. Peeling of molded piece (visual)
A bending test was performed using the above obtained ISO 3167, multi-purpose test piece A-type dumbbell molded piece, and the presence or absence of delamination at the time of fracture was visually determined. Those without delamination were determined to be suitable for use in this application.

6). Measurement of average particle diameter of dispersed particles of component containing AS resin (B) in resin composition The core layer part (flow direction cross section) of the central part of the molded flat plate obtained above was 10000-50000 with a transmission electron microscope. Using a photograph taken at double magnification, the major axis and minor axis that pass through the center of gravity of the dispersed particles containing the AS resin (B) extracted at random 200 are measured. The diameter was calculated.

7). Residence molding stability The pellets of the resin composition were dried in a hot air dryer at 120 ° C. for 3 hours. The resin composition after drying was continuously processed by an injection molding machine (IS-80EPN, manufactured by Toshiba Machine Co., Ltd.) equipped with a film gate mirror mold having a size of 100 mm × 100 mm × 2 mm whose surface was polished with # 5000. Ten shots were molded to obtain 10 molded flat plates. The molding conditions are as follows: cylinder temperature 320 ° C., mold temperature 120 ° C., injection pressure (gauge pressure 70 MPa), injection speed (panel set value) 85%, injection time / cooling time = 10 sec / 120 sec. Later, the measured value was set so that half of the resin remained in the cylinder each time. The retention molding stability was evaluated according to the following criteria.
<Evaluation criteria for stagnant molding stability>
○: Silver is not recognized at all in all 10 shots of the molded flat plate.
Δ: Silver is recognized in 1 to 3 shots.
X: Silver is recognized in 4 shots or more.
In the above criteria, it was determined that the “◯” can be more suitably used in this application.

[raw materials]
<Polyphenylene ether (A)>
(PPE1) Reduced viscosity (measured at 30 ° C. using chloroform solvent) 0.40 dl / g poly (2,6-dimethyl-1,4-phenylene) ether (hereinafter sometimes referred to as “PPE1”) ).
(PPE2) Reduced viscosity (measured at 30 ° C. using chloroform solvent) 0.35 dl / g poly (2,6-dimethyl-1,4-phenylene) ether (hereinafter sometimes referred to as “PPE2”) ).

<AS resin (B)>
(AS resin with AN content of 20% by mass)
Product name: Stylac AS T8707 [registered trademark] manufactured by Asahi Kasei Chemicals Corporation (MFR: 30) was used.
(AS resin with AN content of 29% by mass)
Product name: Stylac AS 783 [registered trademark] manufactured by Asahi Kasei Chemicals Corporation (MFR: 9 g / 10 min) was used.
(AS resin with AN content of 40% by mass)
Product name: Stylac AS 727 [registered trademark] manufactured by Asahi Kasei Chemicals Corporation (MFR: 12 g / 10 min) was used.

<AS resin (C)>
(AS resin with AN content of 9% by mass)
Styrene-acrylonitrile resin produced as follows was used.
A mixed liquid consisting of 4.7 parts by mass of acrylonitrile, 73.3 parts by mass of styrene, 22 parts by mass of ethylbenzene, and 0.02 parts by mass of t-butylperoxy-isopropyl carbonate as a polymerization initiator was added at 2.5 liters / hour. The polymer was continuously fed at a flow rate to a 5 liter fully mixed reactor and polymerized at 142 ° C. to obtain a polymerization solution.
The resulting polymerization solution is continuously led to an extruder with a vent, and unreacted monomers and solvent are removed under conditions of 260 ° C. and 40 Torr, the polymer is continuously cooled and solidified, and chopped into particulate styrene. -Acrylonitrile resin (hereinafter also referred to as "AS resin") was obtained.
The composition analysis of this styrene-acrylonitrile resin by infrared absorption spectroscopy revealed that it was 9% by mass of acrylonitrile units and 91% by mass of styrene units. The melt flow rate of the styrene-acrylonitrile resin was 78 g / 10 min (according to ASTM D 1238, measured at 220 ° C. and 10 kg load).

<Styrenic thermoplastic elastomer (D)>
(Elastomer 1) Trade name: Tuftec H1081 [registered trademark], manufactured by Asahi Kasei Chemicals Corporation.
(Elastomer 2) Trade name: Kraton G1651 [registered trademark], manufactured by Kraton Polymer Co., Ltd.

<Other raw materials>
(GPPS) Polystyrene 680 [registered trademark], manufactured by PS Japan.
(PC) Polycarbonate, trade name: Wonderlight PC110 [registered trademark], manufactured by Asahi Kasei Corporation.

[Comparative Example 1]
50% by mass of PPE1, 25% by mass of PPE2, and 25% by mass of GPPS (polystyrene 680 [registered trademark], manufactured by PS Japan), a TEM58SS twin screw extruder (manufactured by Toshiba Machine Co., Ltd., barrel number 13, screw) Supplied from the most upstream part (top feed) of 58 mm in diameter, L / D = 53, screw pattern having kneading disc L: 2 pieces, kneading disc R: 14 pieces, and kneading disc N: 2 pieces. The mixture was melt-kneaded at a cylinder temperature of 300 ° C., a screw speed of 400 rpm, an extrusion rate of 300 kg / hr, and a vent vacuum of 7.998 kPa (60 Torr) to obtain a resin composition. The physical property measurement results of the obtained resin composition are shown in Table 1 below.

[Examples 1 to 13 and Comparative Examples 2 to 14]
A resin composition was obtained in the same manner as in Comparative Example 1 except that the types and mixing ratios of the raw materials were changed as shown in Tables 1 to 4. The physical property measurement results of the obtained resin composition are shown in Tables 1 to 4 below.

In Comparative Examples 3 and 10, the resin composition extruded from the extruder nozzle was judged to be untaken because the die swell was intense and it was very difficult to take up the strand (sampling of the pellet).

As shown in Table 1, since the resin compositions of Comparative Examples 1 and 2 do not contain the component (B) of the present application, the white spots on the surface of the molded body are not reduced and the appearance is not sufficient, and the retention molding stability is also good. It was not enough. In the resin composition of Comparative Example 3, since the content of the component (B) exceeds the claimed range of the present application, strands cannot be taken out during extrusion, and production stability is insufficient. On the other hand, the resin compositions of Examples 1 to 7 are the resin compositions of the claims of the present application, and all of them have markedly reduced white spots on the surface of the molded product, exhibit a good molded appearance, and also have stable molding stability. Since it was favorable, it turned out that it can be used conveniently as a material of the molded object for light reflection components.

As shown in Table 2, since the resin composition of Comparative Example 6 is a compound in which the component (B) is less than the prescribed amount of the present application, white spots on the surface of the molded body are not sufficiently reduced, and the aluminum vapor-deposited appearance of the molded body Was not enough. Also, the retention molding stability was insufficient. On the other hand, the resin compositions of Examples 8 to 11 are the resin compositions of the claims of the present application, and all have few white spots on the surface of the molded body, and in particular, as the amount of component (B) increases, the white spots decrease. There was also a tendency for the aluminum deposition appearance to be even better. In addition, the retention molding stability was also good, and the balance between molding fluidity and heat resistance was excellent, and it was found that it can be suitably used as a material for a molded article for light reflecting parts.

As shown in Table 3, in the resin compositions of Comparative Examples 7 and 8, the miscibility of the component (B) is reduced because GPPS is blended instead of the component (C), Surface peeling was observed on the molded body. Also, the retention moldability was insufficient. Further, in the resin composition of Comparative Example 7, white spots on the surface of the molded body were not sufficiently reduced. The resin compositions of Comparative Example 10 and Comparative Example 11 were blended so that the component (B) exceeded the specified amount in the claims of the present application, so the miscibility of the component (B) in the resin composition could not be sufficiently maintained, and molding Surface peeling was observed on the body. In the resin composition of Comparative Example 10, the component (B) exceeds the specified amount in the claims of the present application, and since the component (C) is not blended, the strand cannot be taken out during extrusion, and the production stability is insufficient. Met. On the other hand, since the resin composition of Example 12 is the resin composition claimed in the present application, the retention molding stability was good, the white spots were remarkably reduced, and the aluminum deposition appearance was also good. It was found that it can be suitably used as a body material.

  As shown in Table 4, the resin compositions of Comparative Examples 12 and 13 all had white spots on the surface of the molded body reduced and the aluminum deposition appearance was good, but remained because the component (B) was not blended. Molding stability was insufficient. In the resin composition of Comparative Example 14, since the component (C) was not blended, surface layer peeling was observed on the molded body. On the other hand, since the resin composition of Example 13 is the resin composition claimed in the present application, the retention molding stability was good, the white spots were remarkably reduced, and the aluminum deposition appearance was also good. It was found that it can be suitably used as a body material.

  The resin composition of the present invention has a low specific gravity, has a good balance between heat resistance and fluidity, has very few white spots on the surface of the molded article after aluminum deposition, and is excellent in aluminum deposition appearance, and also remains. Since a molded article excellent in molding stability can be obtained, it can be effectively used as a material for a molded article for a light reflecting part such as an automobile lamp reflector molded article or an automobile lamp extension molded article.

Claims (5)

60 to 95% by mass of polyphenylene ether (A),
Styrene-acrylonitrile resin (AS resin) (B) 15-1% by mass with an acrylonitrile (AN) content of 16-45% by mass,
Styrene-acrylonitrile resin (AS resin) (C) 39-3 mass% of acrylonitrile (AN) content 5-11 mass%,
Contain,
The component containing the component (B) is present as dispersed particles in the resin composition, and the average particle size of the dispersed particles is in the range of 0.05 to 1.8 μm .
Resin composition.   The resin composition according to claim 1, further comprising 1 to 25 parts by mass of a styrenic thermoplastic elastomer (D) with respect to 100 parts by mass of the total amount of the components (A), (B) and (C). . The molded object for light reflection components containing the resin composition of Claim 1 or 2 . The light reflection component containing the molded object for light reflection components of Claim 3 , and the aluminum vapor deposition film which coat | covers at least one part of the said molded object for light reflection components. To claim 1 or 2 comprising the resin composition according automotive lamp extensions moldings.