JP2009120705A - Thermoplastic resin composition and extruded resin molding thereof - Google Patents

Abstract

[PROBLEMS] To obtain a thermoplastic resin composition having a metallic feeling such as brightness and texture like aluminum metal and having a high-class feeling in which the surface of metallic pigment particles is extremely low in extrusion molding, and an extruded resin molded body thereof. With the goal.
SOLUTION: (A) 100 parts by mass of a thermoplastic resin, (B) 0.5 to 10 parts by mass of mica having an average particle size of 5 to 100 μm and a metal oxide coverage of 20 to 50%, and (C) an average A thermoplastic resin composition comprising an aluminum pigment having a particle size of 0.1 to 50 μm, and 0.05 to 10% by mass of (C) an aluminum pigment based on (B) mica.
[Selection figure] None

Description

  The present invention relates to a thermoplastic resin composition having a metallic feeling such as brightness and texture like aluminum metal, and having an extremely small surface floating of metal pigment particles in extrusion molding, and an excellent surface appearance thereof. About the body.

Metal members have a high-class feeling and are used in many products such as automobiles, building materials, and home appliances, but there is a strong demand for resinization from the viewpoints of weight reduction and processed surfaces. Therefore, conventionally, the resin molded body has been dealt with by painting or plating, but since painting and plating have problems in terms of economy and environment, pearl pigments are blended in the resin in advance. It has been reported that a thermoplastic resin having a metallic tone is used (for example, see Patent Document 1). However, this method can improve the metallic luster, but it does not satisfy the original luminance and texture of the metal, and further improvement is desired. Then, the thermoplastic resin which mix | blended aluminum powder of a specific particle size other than a pearl pigment is reported (for example, refer patent document 2). In the combined use of the pearl pigment and aluminum powder as in this method, the aluminum powder having a specific aspect ratio is used in a specific ratio with respect to the pearl pigment. It is possible to give a feeling of brightness. On the other hand, when aluminum powder with a large specific particle size is used, it has been pointed out that the aluminum powder tends to be raised on the surface in extrusion molding, resulting in poor appearance. Therefore, a thermoplastic resin having a metallic tone and a brightness feeling that can be used for extrusion molding is desired.
JP 2000-319522 A Patent 2524922

  An object of the present invention is to provide a thermoplastic resin composition having a metallic feeling such as brightness and texture like aluminum metal, and having a high-class feeling in which the surface of metallic pigment particles is extremely low in extrusion molding, and an extruded resin molded body thereof. The purpose is to obtain.

As a result of intensive studies to solve the above problems, the present inventors have blended a specific mica into a thermoplastic resin and blended a specific aluminum pigment in a specific range with respect to the mica, so that the surface of the surface can be extruded. The present invention has been completed by ascertaining excellent appearance characteristics and metallic feeling such as brightness and texture like aluminum metal.
That is, the present invention comprises (A) 100 parts by mass of a thermoplastic resin, (B) 0.5 to 10 parts by mass of mica having an average particle size of 5 to 100 μm and a metal oxide coverage of 20 to 50%, and (C A thermoplastic resin composition comprising an aluminum pigment having an average particle size of 0.1 to 50 μm, and containing 0.05 to 10% by mass of (C) an aluminum pigment with respect to (B) mica and its This is an extruded resin molding.

  The present invention provides a resin composition which has a metallic feeling such as brightness and texture like aluminum metal, and has a high-grade feeling in which the surface of metallic pigment particles is extremely low in extrusion molding, and an extruded article thereof. It has become possible.

The present invention will be specifically described below.
The thermoplastic resin (A) used in the present invention is not particularly limited. For example, polyethylene, polypropylene, vinyl chloride resin, polystyrene, AS resin, ABS resin, ASA resin, AES resin, acrylonitrile-butyl acrylate-styrene copolymer Examples of the polymer include polymethyl methacrylate, MS resin, MBS resin, polycarbonate, polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, polyamide, polyacetal, modified polyphenylene ether, and polyurethane. Of these, AS resin, ABS resin, ASA resin, AES resin, polycarbonate, and polymethylmethacrylate are preferred, and in applications that require further weather resistance, ASA resin, AES resin, aromatic vinyl monomer, unsaturated nitrile monomer Preferred are a polymer, a copolymer containing a copolymer composed of an unsaturated carboxylic acid alkyl ester monomer, and polymethyl methacrylate. These can also contain other monomers that are copolymerizable.

The aromatic vinyl monomer is not particularly limited, and examples thereof include styrene, α-methylstyrene, o-methylstyrene, p-methylstyrene, o-ethylstyrene, p-ethylstyrene, and pt-butylstyrene. Among them, styrene and α-methylstyrene are preferable. These can be used alone or in combination of two or more.
There is no restriction | limiting in particular in an unsaturated nitrile monomer, For example, an acrylonitrile, a methacrylonitrile, an ethacrylonitrile etc. are mentioned, Among these, an acrylonitrile is preferable.
The unsaturated carboxylic acid alkyl ester monomer is not particularly limited, and examples thereof include alkyl methacrylates such as methyl methacrylate, cyclohexyl methacrylate, methylphenyl methacrylate, and isopropyl methacrylate, methyl acrylate, ethyl acrylate, butyl acrylate, and 2-ethylhexyl acrylate. Examples thereof include alkyl acrylates. Among these, methyl methacrylate, ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate and the like are preferable, and butyl acrylate and methyl methacrylate are more preferable.

Examples of other monomers include maleimide monomers such as N-phenylmaleimide and N-methylmaleimide.
Copolymers composed of aromatic vinyl monomers include polystyrene, AS resin, ABS resin, ASA resin, AES resin, acrylonitrile / butyl acrylate / styrene copolymer, acrylonitrile / N-phenylmaleimide / styrene copolymer, Examples thereof include N-phenylmaleimide / styrene copolymer, acrylonitrile / α-methylstyrene copolymer, MS resin, and MBS resin.
Examples of copolymers comprising aromatic vinyl monomers, unsaturated nitrile monomers, and unsaturated carboxylic acid alkyl ester monomers include ASA resins, acrylonitrile / silicon acrylic rubber / styrene copolymers, acrylonitrile / Examples thereof include butyl acrylate / styrene copolymer, acrylonitrile / methyl methacrylate / styrene copolymer, acrylonitrile / butyl acrylate / α-methyl styrene copolymer, and acrylonitrile / methyl methacrylate / α-methyl styrene copolymer.

Of these, ASA resin, acrylonitrile / silicon acrylic rubber / styrene copolymer, and acrylonitrile / butyl acrylate / styrene copolymer are preferable, and acrylonitrile / butyl acrylate / styrene copolymer is particularly preferable. These can be used alone or in combination of two or more.
There is no restriction | limiting in particular as (B) mica used by this invention, A natural or synthetic thing can be used. Natural examples include muscovite, biotite, and phlogopite. Of these, muscovite and phlogopite are preferred.
The (B) mica used in the present invention has an average particle size of 5 to 100 μm, but is 5 μm or more from the viewpoint of brightness and dispersibility, and 100 μm or less from the viewpoint of extrusion surface properties. Preferably it is 5-80 micrometers, More preferably, it is 7-60 micrometers.

The (B) mica used in the present invention has a metal coverage of 20 to 50%, but is 20% from the viewpoint of brightness and 50% or less from the viewpoint of texture. Preferably it is 20 to 45%, and more preferably 25 to 40%.
Examples of the metal oxide to be coated include titanium oxide, iron oxide, and zinc oxide. Of these, titanium oxide is preferable. These can be used alone or in combination of two or more. As the titanium oxide, both anatase type and rutile type can be used, but the rutile type is preferable.
(B) mica used by this invention is mix | blended 0.5-10 mass parts with respect to 100 mass parts of (A) thermoplastic resins. It is 0.5 parts by mass or more from the viewpoint of brightness, and 10 parts by mass or less from the viewpoint of the extrusion surface appearance. Preferably it is 0.5-7 mass parts, More preferably, it is 1-5 weight part.

There is no restriction | limiting in particular about the manufacturing method of (B) mica used by this invention, A general well-known manufacturing method (For example, Unexamined-Japanese-Patent No. 10-279828) is used.
The (C) aluminum pigment used in the present invention is a paste-like pigment produced using high-purity aluminum as a main raw material, and examples thereof include scaly and granular pigments. These production methods are not particularly limited, and generally known production methods are used. For example, aluminum powder or foil is pulverized and polished in a ball mill containing mineral spirit and stearic acid or oleic acid.
The (C) aluminum pigment used in the present invention has an average particle size of 0.1 to 50 μm, but is 0.1 μm or more from the viewpoint of brightness and dispersibility, and 50 μm or less from the viewpoint of extrusion surface properties. Preferably it is 0.1-30 micrometers, More preferably, it is 0.1-25 micrometers.

(C) Aluminum pigment used by this invention is mix | blended with 0.05-10 mass% with respect to (B) mica. From the viewpoint of brightness, it is 0.05% by mass or more, and from the viewpoint of the extrusion surface appearance, it is 10% by mass or less. Preferably it is 0.05-8 mass%, More preferably, it is 0.1-5 mass%.
The thermoplastic resin composition of the present invention includes (D) a polyolefin having a weight average molecular weight of 50,000 or less, an oxidized polyolefin having a weight average molecular weight of 50,000 or less, and a polyolefin grafted with a styrene resin. It is preferable to contain 0.1-5 mass parts of 1 or more types of olefin resin chosen.

  The (D) olefin resin used in the present invention is a composition produced from at least one of ethylene, propylene, α-olefin and the like, and includes a composition derived from the composition as a raw material. . Examples thereof include polypropylene, ethylene-propylene copolymer, polyethylene (high density, low density, linear low density), oxidized polyolefin, and graft polymerized polyolefin. Preferred are oxidized polyolefin wax and polyolefin grafted with styrene resin, and more preferred are polypropylene wax, polyethylene wax, oxidized polypropylene wax, oxidized polyethylene wax, acrylonitrile-styrene copolymer grafted polypropylene, acrylonitrile-styrene. Copolymer grafted polyethylene, styrene polymer grafted polypropylene, and styrene polymer grafted polyethylene. These preferably have a weight average molecular weight of 50,000 or less from the viewpoint of extrusion moldability. Although there is no restriction | limiting in particular in a minimum, 50,000 or more are preferable from a mixed viewpoint.

The thermoplastic resin composition for extrusion molding of the present invention can contain one or more colorants selected from dyes and pigments in addition to (B) mica and (C) aluminum pigment.
Dyes are azo dyes, anthraquinone dyes, indigoid dyes, sulfur dyes, triphenylmethane dyes, pyrazolone dyes, stilbene dyes, diphenylmethane dyes, xanthene dyes, alizarin dyes, acridine dyes, quinoneimine dyes (azine dyes, oxazine dyes, thiazine dyes) , Thiazole dye, methine dye, nitro dye, nitroso dye and the like.
The pigments are organic pigments and inorganic pigments, and the organic pigments are natural organic pigments and synthetic organic pigments. Natural organic pigments are plant pigments, animal pigments and mineral pigments, and synthetic organic pigments are dyed lake pigments, soluble azo pigments, insoluble azo pigments, condensed azo pigments, azo complex salt pigments, phthalocyanines. Pigments, condensed multiple-reduced pigments, fluorescent pigments and the like. Inorganic pigments are natural inorganic pigments and synthetic inorganic pigments, and natural inorganic pigments are earth pigments, calcined soils, mineral pigments, and the like. Synthetic inorganic pigments include oxide pigments, hydroxide pigments, sulfide pigments, silicate pigments, phosphate pigments, carbonate pigments, metal powder pigments, carbon pigments, and the like. Of these, it is preferable to combine a dye, a synthetic organic pigment, and a synthetic inorganic pigment.

The thermoplastic resin composition of the present invention includes a lubricant, an ultraviolet absorber, a light-resistant agent, an antistatic agent, an antioxidant, a flame retardant, a foaming agent, a fibrous and granular inorganic filler, a natural material, and as necessary. In addition, other commonly used compounding agents and additives may be blended as the thermoplastic resin composition. Among these, it is preferable to mix | blend a lubricant, a ultraviolet absorber, a light-resistant agent, and a filler.
Examples of the lubricant include fatty acid metal salts and those having an amide group or an ester group. These can be used alone or in combination of two or more. The fatty acid metal salt is a salt of a metal and a fatty acid containing one or more selected from sodium, magnesium, calcium, aluminum, and zinc. Preferably, sodium stearate, magnesium stearate, calcium stearate, aluminum stearate (mono, di, tri), zinc stearate, sodium montanate, calcium montanate, calcium ricinoleate, calcium laurate, more preferably Sodium stearate, magnesium stearate, calcium stearate, zinc stearate. The lubricant having an amide group or an ester group is at least one selected from ethylene bisstearylamide, montanic acid, or a wax derived from montanic acid.

  Examples of the wax derived from montanic acid include montanic acid ester wax, montanic acid partially saponified ester wax, lithium montanate, zinc montanate, and a mixture of a wax selected from these and montanic acid. These are preferably blended in an amount of 1 to 200 parts by mass with respect to a total of 100 parts by mass of (B) mica and (C) aluminum pigment. Furthermore, it is preferable that 50-150 mass parts is mix | blended. As UV absorbers, benzotriazoles, benzophenones, salicylates, cyanoacrylates, triazines, oxanilides, nickel complex salts, and inorganic UV absorbers commonly used for other thermoplastic resins are used. Of these, benzotriazole, benzophenone, cyanoacrylate, and triazine are preferable, and benzotriazole and benzophenone are more preferable. These may be used alone or in combination of two or more, and it is preferably blended in an amount of 0.01 to 5 parts by mass with respect to 100 parts by mass of (A) thermoplastic resin.

  As the light-proofing agent, an amine is preferable, and a hindered amine is more preferable. These can be used alone or in combination of two or more, and (A) 0.01 to 10 parts by mass is preferably compounded with respect to 100 parts by mass of the thermoplastic resin. Fillers include glass fiber, carbon fiber, metal fiber, aramid fiber, potassium titanate whisker, aluminum borate whisker, wollastonite, talc, calcium carbonate, kaolin, glass flakes, glass beads, titanium oxide and aluminum oxide. Of these, glass fiber, wollastonite, talc, calcium carbonate, and glass beads are preferable. Further, these fillers are particularly preferably surface-treated. The surface treatment is performed using a coupling agent or a film forming agent, and examples of the coupling agent include an epoxy coupling agent, a silane coupling agent, and a titanium coupling agent. In particular, when a fibrous filler is blended, the average fiber length, average fiber diameter, and aspect ratio of the fiber are not particularly limited, but the average fiber length is preferably 50 μm or more in view of mechanical characteristics and fatigue characteristics, and is 100 μm. More preferably, it is more preferably 150 μm or more. The average fiber diameter is preferably 5 μm or more, and the aspect ratio is preferably 10 or more.

The method for producing the thermoplastic resin composition of the present invention is not particularly limited, but is generally used for thermoplastic resins such as single-screw or twin-screw vented extruders, plastmills, kneaders, Banbury mixers, and brabenders. Various mixing devices can be used. Of these, production by a twin-screw vented extruder is desirable.
The thermoplastic resin composition of the present invention can be molded by various molding methods used for general thermoplastic resins, for example, press molding, injection molding, gas assist injection molding, welding molding, extrusion molding, blow molding. , Film molding, hollow molding, multilayer molding, foam molding and the like. Of these, extrusion molding, particularly multilayer extrusion molding is preferred.

The extruded product of the present invention is a molded product produced by extrusion molding. Extrusion molding is a method of molding using a generally known apparatus such as an extruder, and the production method is not particularly limited, but an extrusion molding machine, a die, a sizing die, a cooling tank, a take-up machine, and This is a molding method using a series of apparatuses consisting of a winder or a cutting machine. In addition, a roll transfer device or the like generally used in extrusion molding can be provided.
The extruded resin molded body of the present invention is preferably produced by multilayer extrusion molding. Multi-layer extrusion molding is a method for producing a multi-layer molded body in which the molded body is composed of two or more kinds of resins, and is a molding method produced using a plurality of extruders. As a multilayer extrusion molding method, generally known multilayer extrusion molding can be used. The resin used for the multilayer extrusion molding is not particularly limited, and the thermoplastic resin composition of the present invention or other thermoplastic resins capable of being melt-adhered to the thermoplastic resin composition can be used. There are no particular restrictions on these combinations. For example, a two-layer molded article composed of two types of the thermoplastic resin composition and a hard thermoplastic resin, two types of the thermoplastic resin composition and a hard thermoplastic resin, and A three-layer molded body made of one kind of soft thermoplastic resin is preferred. At least the thermoplastic resin composition of the present invention is preferably used on the surface of an extruded resin molded body. The product thickness of the extruded resin molded product is not particularly limited, but the thermoplastic resin composition of the present invention is preferably 0.2 to 5 mm, more preferably 0.5 to 3 mm. From the viewpoint of molding stability, it is 0.2 mm or more, and preferably 5 mm or less.

The extrusion molding machine used for extrusion molding is not particularly limited, but a general single-screw or twin-screw extruder can be used, screw diameter (D) 10 m / mφ or more, screw screw length / screw diameter (L / D) It is preferably 16 or more. The screw design is not particularly limited, but a generally used screw design can be used, and a full flight type is preferable.
Extrusion molding includes foam extrusion molding in which a foaming agent is added, and examples of the method of using the foaming agent include a method of blending with a styrenic resin composition and a method of mixing at the time of molding. But it ’s okay. Examples of the method of mixing at the time of molding include a method of mixing a foaming agent and a method of mixing a foaming agent blended product in which a foaming agent is blended with a thermoplastic resin, and either method may be used. When mixing the foaming agent, food oil, liquid paraffin, fatty acid, and the like can be used as an additive in some cases. The type of foaming agent is not particularly limited, but a commonly used foaming agent can be used, and one or more combinations selected from azo compounds, nitroso compounds, hydrazine derivatives, and bicarbonates are available. preferable.

The molding conditions for extrusion molding vary depending on the performance of the extruder, the cross-sectional shape of the molded body, and the thermoplastic resin to be extruded, but generally a range of conditions for extruding a thermoplastic resin can be used. As resin temperature, 300 degrees C or less is preferable, More preferably, resin temperature is 250 degrees C or less.
There are no particular restrictions on the cross-sectional shape and product of the extruded resin molded body, but it is preferably a sheet shape, pipe shape, square shape, tube shape, etc. from an irregular shape, and the product includes a baseboard, a peripheral edge, a door stop, a sash. A frame, exterior siding, sill, duck, bathroom door frame, bathroom bay window frame, bathroom wall material, handrail, deck material, fence, wood end material, frame material, automobile mall, aero parts, and the like are preferable.

The following examples and comparative examples are for more specifically explaining the present invention, and are not limited to the following examples. In addition, the used thermoplastic resin composition and its compounding agent are as follows.
1. Raw materials used in Examples and Comparative Examples <(A) Thermoplastic resin>
(A-1) AS resin consisting of 40% by mass of acrylonitrile and 60% by mass of styrene, and having a weight average molecular weight of 104,000 (A-2) Consisting of 20% by mass of acrylonitrile and 80% by mass of styrene, and having a weight average molecular weight of 168 AS resin (A-3) having a weight average molecular weight of 110,000, comprising 27% by weight of acrylonitrile (A-3) acrylonitrile, 63% by weight of styrene and 10% by weight of butyl acrylate.

(A-4) ABS resin (A-5) acrylic with 50% by mass of butadiene rubber, rubber mass average particle size of 0.3 μm, 15% by mass of acrylonitrile, 35% by mass of styrene, 55% of graft ratio, and 0.26 of reduced viscosity ASA resin (A-6) Mitsubishi Rayon Co., Ltd. 50% by weight of rubber, weight average particle diameter of 0.3 μm, 13.5% by weight of acrylonitrile, 36.5% by weight of styrene, 50% graft ratio, 0.72 reduced viscosity Company-made Metablene SX-006 (trade name) (acrylonitrile / silicon acrylic composite rubber / styrene copolymer)
(A-7) Delpet 80N (trade name) manufactured by Asahi Kasei Chemicals Corporation (methyl methacrylate resin)

<(B) Mica>
(B-1) Iriodin 100 (trade name) manufactured by Merck & Co., Inc. (mica having an average particle size of 21 μm and a titanium oxide coverage of 29%)
(B-2) Iriodin 111 (trade name) manufactured by Merck & Co. (Mica having an average particle size of 6 μm and a titanium oxide coverage of 43%)
(B-3) Iriodin 163 (trade name) manufactured by Merck Co., Ltd. (mica having an average particle size of 180 μm and a titanium oxide coverage of 14%)

<(C) Aluminum pigment>
(C-1) YP-2000N (trade name) manufactured by Yamaishi Metal Co., Ltd. (average particle size: 18 μm)
(C-2) Alpaste 7430NS (trade name) manufactured by Toyo Aluminum Co., Ltd. (average particle size: 21 μm)
(C-3) Toru Aluminum Co., Ltd. Alpaste 54-452 (trade name) (average particle size: 34 μm)
(C-4) Toru Aluminum Co., Ltd. Alpaste 1950M (trade name) (average particle size 52 μm)

<(D) Olefin resin>
(D-1) Sunwax 161-P (trade name) manufactured by Sanyo Chemical Industries, Ltd. (weight average molecular weight 33,000)
(D-2) Sunwax E-250P (trade name) manufactured by Sanyo Chemical Industries, Ltd. (weight average molecular weight 1 million, acid value 20)

<Others>
(X-1) Kao Wax EB-FF (trade name) manufactured by Kao Corporation (ethylenebisstearic acid amide)
(X-2) SAK-CS-PPT-1 (trade name) (calcium stearate) manufactured by Shinagawa Chemical Co., Ltd.
(X-3) Ishihara Sangyo Co., Ltd. Taipaek CR97 (trade name) (titanium dioxide)
(X-4) Carbon # 960 (trade name) (carbon black) manufactured by Mitsubishi Chemical Corporation

The graft ratio here is defined as the weight ratio of the component graft-copolymerized to the rubber-like polymer to the rubber-like polymer. The polymer produced by the polymerization reaction is dissolved in acetone and separated into an acetone-soluble component and an insoluble component by a centrifuge. At this time, the component dissolved in acetone is a component that has not undergone a graft reaction (non-graft component) among the copolymer that has undergone a polymerization reaction, and the acetone insoluble component is a component that has undergone a graft reaction to the rubber-like polymer and the rubber-like polymer. (Graft component). Since the value obtained by subtracting the weight of the rubber-like polymer from the weight of the acetone-insoluble matter is defined as the weight of the graft component, the graft ratio can be determined from these values.
With reduced viscosity, a thermoplastic resin is dissolved in acetone, and this is separated into an acetone-soluble component and an acetone-insoluble component by a centrifuge. The reduced viscosity of the non-grafted component (non-grafted component) in the thermoplastic resin in the thermoplastic resin was determined by using a solution obtained by dissolving 0.25 g of an acetone soluble component in 50 ml of 2-butanone at 30 ° C. at Cannon-Fenske. It is obtained by measuring the outflow time in the mold capillary.

2. Preparation and evaluation method of molded product Evaluation and various measurements in Examples and Comparative Examples are as follows.
All the components were dry blended at the blending ratios shown in Tables 1 and 2, and melt kneaded at 250 ° C. using a PCM45 twin screw extruder (L / D = 28.9) manufactured by Ikegai Co., Ltd.
In addition, about another component, (X) 0.5 mass part, (X-2) 0.1 mass part, (X-3) 0 with respect to 100 mass parts of (A) thermoplastic resin compositions. .15 parts by mass and (X-4) 0.01 parts by mass were added to all Examples and Comparative Examples.

<Single-layer extrusion molding evaluation: Examples 1 to 10, Comparative Examples 1 to 3>
An NV type 40 m / mSG non-vent type extruder manufactured by Freesia Macross Co., Ltd. was used, and extrusion evaluation was performed at a die shape of about 2 mm × 30 mm and a cylinder set temperature of 170 to 200 ° C.
1) Surface property: When the surface of the extruded molded body having a length of 2 m is visually free of metal pigment particles and has a smooth surface, ◎, when one metal pigment particle floats, ○, metal The case where the float of the system pigment particles was 2 or more was marked as x.
2) Metallic feeling: There is a metallic feeling such as brightness and texture like aluminum metal by visual observation, ◎ when it is mistaken for metal, ○ when it is not mistaken for metal but metallic feeling is seen, and metallic feeling When there was no, it was set as x.
3) Surface gloss: A case where the 60 ° gloss reflection on the surface of the extruded molded product is in the range of 90% or more, ◯, a case where it is in the range of 80% or more and less than 90%, and a range of less than 80% are indicated as x. .

<Two-layer extrusion molding evaluation: Example 11, Comparative Example 4>
In a two-layer extrusion molding using an NV type 40 m / mSG non-vent type extruder (for back side) manufactured by Freesia Macros Co., Ltd. and a P-25 mm extruder (for front side) manufactured by Mars Seiki Co., Ltd. Extrusion evaluation was performed on the back side (3 mm). On the back side, Stylac ABS 220 was used, and the cylinder set temperature was 170 to 200 ° C. for both the front side and the back side.

  The resin composition of the present invention has a metallic feeling such as brightness and texture like aluminum metal, and has a high-class feeling that the surface of metallic pigment particles is extremely low in extrusion molding. In addition, a wide range of extruded parts such as home appliance parts can make it possible to achieve a metallic tone that has been difficult to develop with the prior art.

Claims (6)

  (A) 100 parts by mass of thermoplastic resin, (B) 0.5 to 10 parts by mass of mica having an average particle size of 5 to 100 μm and a metal oxide coverage of 20 to 50%, and (C) an average particle size of 0. A thermoplastic resin composition comprising an aluminum pigment having a size of 1 to 50 μm, and 0.05 to 10% by mass of (C) an aluminum pigment based on (B) mica.   The thermoplastic resin composition according to claim 1, wherein (A) the thermoplastic resin contains a copolymer comprising at least an aromatic vinyl monomer.   (A) The thermoplastic resin contains a copolymer comprising at least an aromatic vinyl monomer, an unsaturated nitrile monomer, and an unsaturated carboxylic acid alkyl ester monomer. 2. The thermoplastic resin composition according to 2.   Furthermore, 0.1 to 5 parts by mass of one or more olefinic resins selected from (D) polyolefins having a weight average molecular weight of 50,000 or less, oxidized polyolefins having a weight average molecular weight of 50,000 or less, and polyolefins grafted with a styrene resin. It mix | blends, The thermoplastic resin composition as described in any one of Claims 1-3 characterized by the above-mentioned.   An extruded resin molded article obtained by extrusion molding the thermoplastic resin composition according to any one of claims 1 to 4.   6. The extruded resin molded article according to claim 5, wherein the extrusion molding is a multilayer extrusion molding in which two or more kinds of resins are molded.