JPH11310683A - Resin composition and molded product thereof having wood grain pattern - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a resin composition that can manifest bright woodgrain patterns and is useful in the fields of office automation, household electric appliance, vehicles, boats and ships, housing or the like by dry-blending a specific styrene resin composition and a colorant-containing resin composition. SOLUTION: This is a resin composition for developing woodgrain patterns that is prepared by dry-blending a mixture comprising (A) 100 pts.wt. of a styrene resin composition containing (A1 ) 20-100 wt.% of a styrene resin prepared by (co)polymerizing an aromatic vinyl compound and, when necessary, other copolymerizable vinyl monomers in the presence (absence) of gum polymer, (A2 ) 0-80 wt.% of cellulosic substance and (A3 ) 0-80 wt.% of inorganic filler where A1 +A2 A3 =100% and in addition (A4 ) 1-12 pts.wt. of a lubricant is melt- kneaded, and (B) 0.1-30 pts.wt. of a resin composition containing (B1 ) 65-99 wt.% of a thermoplastic resin and (B2 ) 35-1 wt.% of a dye or pigment where they are melt-kneaded so that B1 +B2 =100% may be attained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin composition capable of exhibiting a wood grain pattern and a molded article having the wood grain pattern obtained by molding the same.

[0002]

2. Description of the Related Art Conventionally, styrene resins have been widely used in the fields of office automation (OA), home electric appliances, vehicles, etc. because of their good coloring properties. However, depending on the field in which it is used, it is necessary to apply a wood grain pattern. Generally, after molding, a method of applying a wood grained sheet or the like is performed. However, in such a method, there is a problem that the price of the wood-grained sheet is high, a process for bonding the sheets is required, the cost is increased, and further, a problem that the woodgrain pattern is monotonous. is there.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and is directed to a resin composition capable of exhibiting a grain pattern and a molded article having the grain pattern obtained by molding the resin composition. The purpose is to provide.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a method for producing an aromatic vinyl compound and, if necessary, an aromatic vinyl compound in the presence or absence of (A) a rubbery polymer (a). (B) 1 to 12 parts by weight of a lubricant is melt-kneaded with 100 parts by weight of a styrene resin obtained by (co) polymerizing a monomer component (b) composed of another vinyl monomer. (C) 65 to 99% by weight of thermoplastic resin, and (D) dye and / or
Or 35 to 1% by weight of pigment [provided that (C) + (D) =
100% by weight] and a resin composition (II)
A dry-blend of 0.1 to 30 parts by weight to produce a wood grain pattern. The above-mentioned resin composition (I) can be obtained by preparing, in the presence or absence of (A) the rubbery polymer (a), an aromatic vinyl compound and, if necessary, another vinyl copolymer which can be copolymerized with the aromatic vinyl compound. Monomer component (b) consisting of a monomer
(Styrene) resin obtained by (co) polymerizing 20 to 100
Wt%, (E) 0-80 wt% of a cellulosic material, and (F) 0-80 wt% of an inorganic filler (provided that (A)
+ (E) + (F) = 100% by weight], and a resin composition obtained by melt-kneading (B) 1 to 12 parts by weight of a lubricant with respect to 100 parts by weight of the resin composition comprising: . Further, the lubricant (B) may be a compound having a long-chain alkyl group and a functional group and / or an ethylene-based copolymer. The present invention also provides a molded article having a grain pattern formed by molding the above-described resin composition.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Resin Composition (I) The resin composition (I) used in the present invention is to be a base resin of the resin molded article of the present invention. Here, the styrene resin (A) used in the resin composition (I) is mixed with an aromatic vinyl compound and optionally an aromatic vinyl compound in the presence or absence of the rubbery polymer (a). It can be obtained by (co) polymerizing a monomer component (b) composed of another copolymerizable vinyl monomer. As the styrene resin (A), for example, an aromatic vinyl compound, or another vinyl monomer copolymerizable with an aromatic vinyl compound and an aromatic vinyl compound in the presence of the rubbery polymer (a) Rubber-reinforced styrene-based polymer obtained by (co) polymerizing monomer component (b) consisting of an aromatic vinyl compound, or an aromatic vinyl compound and another vinyl monomer copolymerizable with aromatic vinyl compound. A styrene-based polymer obtained by (co) polymerizing the monomer component (b) consisting of a monomer, or a mixture of the rubber-reinforced styrene-based polymer and a styrene-based polymer. Can be used in combination with the thermoplastic resin.

Examples of the rubbery polymer (a) used herein include polybutadiene, polyisoprene, butyl rubber, styrene-butadiene copolymer (styrene content is preferably 5 to 60% by weight), and styrene-isoprene copolymer. Copolymer, acrylonitrile-butadiene copolymer, ethylene-α-olefin-based copolymer, ethylene-α-olefin-polyene copolymer, silicone rubber, acrylic rubber, butadiene- (meth) acrylate copolymer, styrene- Butadiene block copolymer, styrene-isoprene block copolymer, hydrogenated styrene-butadiene block copolymer, hydrogenated butadiene-based polymer,
Ethylene ionomers and the like can be mentioned.

The styrene-butadiene block copolymer and the styrene-isoprene block copolymer include A
B-type, ABA-type, taper-type, and those having a radial teleblock-type structure are included. The hydrogenated butadiene-based polymer includes, in addition to the hydride of the above block copolymer, a hydride of a block of a styrene block and a styrene-butadiene random copolymer, and a 1,2-vinyl bond content in polybutadiene. Hydride of a polymer comprising a block having a polybutadiene block content of not more than 20% by weight and a 1,2-vinyl bond content of more than 20% by weight.

[0008] The weight ratio of ethylene to α-olefin in the ethylene-α-olefin copolymer is 95%.
/ 5 to 5/95, preferably 95/5 to 20/80, and more preferably 92/8 to 60/40. Mooney viscosity of ethylene-α-olefin copolymer (M
L _{1 + 4} , 100 ° C.) is ₅ to 200 from the viewpoint of impact resistance.
Preferably it is 5-100, more preferably 5-50. The α-olefin used here has 3 to 2 carbon atoms.
0 unsaturated hydrocarbon compounds, specifically, propylene, butene-1, pentene-1, hexene-1, heptene-1, 4-methylbutene-1, 4-methylpentene-1 and the like. Can be

Further, the unsaturated group in the ethylene-α-olefin-polyene copolymer is from 4 to 4 in terms of iodine value.
A range of 40 is preferred. The type of polyene used is
Examples thereof include alkenyl norbornenes, cyclic dienes, and aliphatic dienes, and preferably include 5-ethylidene-2-norbornene, dicyclopentadiene, and the like. The above rubbery polymers (a) can be used alone or in combination of two or more.

The styrene resin (A) is obtained in the presence of a rubber-reinforced styrene-based polymer or a rubbery polymer obtained in the presence of the above-mentioned rubbery polymer in terms of impact resistance. A mixture of a rubber-reinforced styrene polymer and a styrene polymer obtained by (co) polymerizing an aromatic vinyl compound (and other copolymerizable vinyl monomers) in the absence of a rubbery polymer It is preferred to use

The ratio of the rubbery polymer (a) in the styrene resin (A) is preferably 3 to 3 times the total amount of the rubbery polymer (a) and the monomer component (b). 80% by weight, more preferably 5 to 60% by weight, 3% by weight
If it is less than 80, the impact strength is undesirably reduced.
If the amount is more than the weight percentage, the moldability, elastic modulus and heat deformation temperature are undesirably lowered. Further, the resin composition (I) of the present invention
The content of the rubbery polymer (a) therein is preferably from 1 to 3.
0% by weight, more preferably 3 to 25% by weight.

On the other hand, (A) the aromatic vinyl compound constituting the monomer component (b) used in the styrene resin includes styrene, t-butylstyrene, α-methylstyrene, p-methylstyrene, divinylbenzene. , 1,1-
Diphenylstyrene, N, N-diethyl-p-aminomethylstyrene, N, N-diethyl-p-aminoethylstyrene, vinylpyridine, vinylxylene, monochlorostyrene, dichlorostyrene, monobromostyrene, dibromostyrene, fluorostyrene, ethyl styrene,
Vinyl naphthalene and the like, particularly styrene, α-
Methylstyrene is preferred. These aromatic vinyl compounds can be used alone or in combination of two or more. The amount of the aromatic vinyl compound used is preferably 20 to 100% by weight, more preferably 30 to 90% by weight, and particularly preferably 40 to 80% by weight in the monomer component. If it is less than 20% by weight, sufficient moldability cannot be obtained.

Further, other vinyl monomers include vinyl cyanide compounds such as acrylonitrile and methacrylonitrile; methyl acrylate, ethyl acrylate, and the like.
Alkyl acrylates such as propyl acrylate, butyl acrylate, amino acrylate, hexyl acrylate, octyl acrylate, 2-ethylhexyl acrylate, cyclohexyl acrylate, dodecyl acrylate, octadecyl acrylate, phenyl acrylate, and benzyl acrylate; methyl methacrylate, ethyl methacrylate, propyl methacrylate; Alkyl methacrylates such as butyl methacrylate, amino methacrylate, hexyl methacrylate, octyl methacrylate, 2-ethylhexyl methacrylate, cyclohexyl methacrylate, dodecyl methacrylate, octadecyl methacrylate, phenyl methacrylate and benzyl methacrylate; Itaconic acid, unsaturated acid anhydrides such as citraconic anhydride, acrylic acid, methacrylic acid,
Unsaturated acids such as maleic acid; maleimide, N-methylmaleimide, N-ethylmaleimide, N-propylmaleimide, N-butylmaleimide, N- (p-methylphenyl) maleimide, N-phenylmaleimide, N-cyclohexylmaleimide, etc. An imide compound of an α, β-unsaturated dicarboxylic acid; an epoxy group-containing unsaturated compound such as glycidyl methacrylate or allyl glycidyl ether;
Unsaturated carboxylic acid amides such as acrylamide and methacrylamide; unsaturated compounds containing an amino group such as acrylamine, aminomethyl methacrylate, aminoether methacrylate, aminopropyl methacrylate and aminostyrene; 3-hydroxy-1-propene; -Hydroxy-1-butene, cis-4-hydroxy-2-butene, trans-4-hydroxy-2-butene, 3-hydroxy-2-methyl-1-propene, 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate And oxazoline group-containing unsaturated compounds such as vinyl oxazoline.

Among the other vinyl monomers, particularly preferred are vinyl cyanide compounds, alkyl (meth) acrylates, unsaturated acid anhydrides, unsaturated acids, α, β
-At least one vinyl monomer selected from the group consisting of imidized unsaturated dicarboxylic acids, unsaturated compounds containing epoxy groups, and unsaturated compounds containing hydroxyl groups. Specific examples of preferred other vinyl monomers include acrylonitrile, methacrylic acid, methyl methacrylate, butyl acrylate, maleic anhydride, N-phenylmaleimide, glycidyl methacrylate, 2-hydroxyethyl methacrylate, and the like.

Preferred combinations of (A) the monomer component (b) constituting the styrenic resin are as follows. Styrene / acrylonitrile styrene / methyl methacrylate styrene / N-phenylmaleimide styrene / N-phenylmaleimide / maleic anhydride styrene / acrylonitrile / hydroxyl group-containing unsaturated compound styrene / acrylonitrile / unsaturated acid styrene / acrylonitrile / epoxy group-containing unsaturated compound styrene / Acrylonitrile / Oxazoline group-containing unsaturated compound

In the above-mentioned imide compounds of α, β-unsaturated dicarboxylic acids, those obtained by post-imidization (completely or partially) of a copolymer of the above-mentioned aromatic vinyl compound and the above-mentioned unsaturated acid anhydride may also be used. It is included in the monomer component constituting the component (A) of the present invention. The amount of the other vinyl monomer is preferably 80% by weight or less, more preferably 70 to 10% by weight, and particularly preferably 60% by weight in the monomer component.
-20% by weight. The other vinyl monomers described above include 1
Species can be used alone or in combination of two or more.

As described above, the styrene resin (A) of the present invention includes, as described above, another thermoplastic resin, for example, the same resin as the following component (C), and preferably contains
Components blended in an amount of 0% by weight or less, more preferably 70% by weight or less, and particularly preferably 50% by weight or less are also included in the component (A) of the present invention. Further, various fillers can be blended as required.

The resin composition (I) contains (B) a lubricant. As the lubricant (B), a known lubricant can be used. Specifically, compounds having a long-chain alkyl group and a functional group, α-olefin (co) polymers such as ethylene and propylene, silicon-containing polymers such as dimethylpolysiloxane, and α-olefins and Copolymer with a saturated compound, ethylene-based copolymer, propylene-based copolymer, ethylene-propylene copolymer,
Polymers obtained by adding a functional group-containing unsaturated compound to a polymer such as a silicon-containing polymer, or a polymer obtained by oxidizing a polyethylene, polypropylene, ethylene-propylene copolymer or the like and adding a carboxyl group or the like. No.

Here, the functional group includes a carboxyl group or a metal salt thereof, a hydroxyl group, an oxazoline group, an acid anhydride group, an ester group, an amino group, an amide group, an epoxy group, an isocyanate group, a urethane group, a urea group and the like. Is mentioned. Preferred functional groups are a carboxyl group or a divalent metal salt thereof, an ester group, and an amide group.
As the salt of the carboxyl group, sodium, potassium,
Lithium, calcium, magnesium, aluminum,
Zinc, barium, cadmium, manganese, cobalt,
Metal salts such as lead and tin are exemplified. As the functional group-containing unsaturated compound, all those described above are used. Preferred are compounds having a long-chain alkyl group and a functional group, and ethylene-based copolymers.

The amount of the lubricant (B) used in the resin composition (I) is 1 to 12 parts by weight, preferably 2 to 8 parts by weight, based on 100 parts by weight of the styrene resin (A).
If the amount is less than 1 part by weight, a clear grain pattern cannot be obtained, while
If it exceeds 12 parts by weight, surging occurs during melt-kneading, and kneading cannot be performed.

Next, the resin composition (I) of the present invention may optionally contain (E) a cellulosic substance or (F) an inorganic filler. (E) Examples of the cellulosic substances include plant substances such as wood flour, paper, pulp, firgrass, and bagasse, and crushed products thereof. (E)
The shape of the cellulosic material, such as powder or fibrous,
All shapes are included. Among them, as the wood flour, various types can be used without limitation, for example, pine, such as Scots pine, Abies sachalinensis, larch, hemlock, cherry, cedar, oak, hinoki, linden, beech, lauan, fir, etc. Can be Saw chips, sawdust, and small pieces of wood, which are generated when the raw wood is cut and sawn, are used. Also, for example, pulverized materials such as bamboo grass, powders, and powders such as paper, pulp, and firgrass are included. Further, a delignified product of these cellulosic substances, an alkali-treated product, and a defatted product can also be used. (E) The cellulosic material is preferably used in the form of a pulverized product, more preferably a powder of 100 mesh pass or less. These (E) cellulosic substances can be used alone or in combination of two or more.

(F) As the inorganic filler, glass fiber, carbon fiber, metal fiber, glass bead, wollastonite, milled fiber of glass, rock filler, calcium carbonate, talc, mica, kaolin, barium sulfate, graphite, Examples include molybdenum sulfide, magnesium oxide, zinc oxide whiskers, potassium titanate whiskers, glass balloons, ceramic balloons, and the like, and preferably calcium carbonate, talc, kaolin, and potassium titanate whiskers. Of these inorganic fillers,
As the shape of the glass fiber and the carbon fiber, those having a fiber diameter of 6 to 60 μm and a fiber length of 30 μm or more are preferable. These (F) inorganic fillers can be used alone or in combination of two or more.

When the resin composition (I) of the present invention contains (E) a cellulosic substance and (F) an inorganic filler, (A) + (E) + (F) = 100% by weight,
Component (E) is used in an amount of 0 to 80% by weight, preferably 0 to 80% by weight.
It is 60% by weight, more preferably 0 to 40% by weight.
If the amount used exceeds 80% by weight, the material strength is inferior and is not preferred. Component (F) is used in an amount of 0 to 80% by weight,
It is preferably 0 to 60% by weight, more preferably 0 to 40% by weight.
% By weight. If the amount used exceeds 80% by weight, the material strength of the molded product is inferior.

Resin Composition (II) The resin composition (II) of the present invention is a composition obtained by melt-mixing (C) a thermoplastic resin and (D) a dye and / or a pigment. Among them, as the thermoplastic resin of the component (C) constituting the resin composition (II), all known thermoplastic resins can be used, and the styrene resin of the component (A) can also be used. Specifically, the styrene resin as the component (A), a polyolefin resin such as polyethylene, polypropylene, and polybutene-1, nylon 6,6,
Polyamides such as nylon 6, nylon 11, nylon 12, and nylon 4, 6, polyesters such as polybutylene terephthalate and polyethylene terephthalate;
Wholly aromatic polyester, polycarbonate resin, polyether resin such as polyoxymethylene, polyphenylene sulfide, polyamide elastomer and the like,
These can be used alone or in combination of two or more. Particularly preferred resins are styrene resins, polyamides, polyesters, and polycarbonate resins. The amount of the thermoplastic resin (C) used in the resin composition (II) is 65 to 99% by weight, preferably 70 to 98% by weight, and more preferably 75 to 97% by weight. (C)
When the amount of the component is out of the range of the present invention, a clear grain pattern cannot be obtained.

The resin composition (II) contains (D) a dye and / or a pigment. (D) a dye and / or
Examples of the pigment include known dyes, organic pigments, and inorganic pigments used for coloring a resin. These may be used alone or in combination of two or more. Among them, examples of the dye include chlorinated dye lakes such as heterocyclic, anthraquinone, azo, perinone and rhodamine lakes. Examples of the organic pigment include perinone type, fluorescent brightener, phthalocyanine type, quinacridone type, azo type such as permanent red, lake red, first yellow, nitroso type, nitro type and the like. Of these, azo-based and phthalocyanine-based are preferably used. As inorganic pigments, zinc white,
Zinc oxide such as titanium yellow, titanium oxide such as titanium white, calcined, ultramarine, cobalt blue, iron oxide such as red iron, carbon black, sulfide such as iron sulfide and cadmium sulfide, and lead chromate And chromate such as zinc chromate, carbonate, metal powder and the like. Among these, iron oxide, carbon black,
Ultramarine blue can be preferably used.

The amount of the component (D) used in the resin composition (II) is 35 to 1% by weight, preferably 30 to 2% by weight, and more preferably 25 to 3% by weight. If the amount of the component (D) is out of the range of the present invention, a clear grain pattern cannot be obtained. The resin composition (II) may be used alone or in combination of two or more. By using two or more kinds, a complicated grain pattern can be obtained.

The resin composition of the present invention comprises a resin composition comprising (A) a styrenic resin and (B) a lubricant (further, (E) a cellulosic substance and / or (F) an inorganic filler). It is obtained by dry-blending (I) and the above-mentioned (C) thermoplastic resin and (D) a resin composition (II) containing a dye and / or a pigment as a main component. By dry blending, a clear grain pattern can be obtained when molded. The mixing ratio of the resin composition (I) and the resin composition (II) is such that the resin composition (II) is 0.1 to 30 parts by weight with respect to 100 parts by weight of the resin composition (I).
Preferably 0.2 to 20 parts by weight, more preferably 0.1 to 0.2 parts by weight.
5 to 15 parts by weight. Outside this range, a clear grain pattern cannot be obtained.

The above resin compositions (I) and (II)
Include known coupling agents, antibacterial agents, antifungal agents, flame retardants, flame retardant aids, antioxidants, weather (light) resistant, plasticizers,
Silicone oils, mineral oils and various other extending oils, surfactants, colorants (pigments, dyes, etc.), lubricants,
Additives such as a metal powder, an antistatic agent and a processing aid can be blended. These additives may be added at the time of kneading, or may be added externally. Further, a master batch in which these various additives are blended at a high concentration can be added.

Further, the same effect can be obtained by molding the resin composition of the present invention by foam molding. in this case,
The known foaming agent and foaming method can be used. As the foaming agent, a physical foaming agent or a chemical foaming agent can be used. As the physical foaming agent, inorganic materials such as air, carbon dioxide gas, and nitrogen gas, and organic materials such as butane, pentane, hexane, and chlorofluorocarbon can be used. Examples of the chemical foaming agent include inorganic systems such as sodium bicarbonate + acid, bicarbonate, and carbonate, and examples of the organic system include isocyanate compounds, azo compounds, and hydrazine derivatives.
There are semicarbazide compounds, azide compounds, nitroso compounds, triazole compounds and the like. Further, a masterbatch in which these foaming agents are blended at a high concentration can be used. These blowing agents can be added to the resin composition (I) and / or (II). Also, it can be added by dry blending.

The resin compositions (I) and (II) of the present invention can be obtained by kneading the components using various extruders, Banbury mixers, kneaders, rolls and the like. A preferred production method is a method using an extruder. Also, when kneading each component,
The components may be kneaded at once, or may be kneaded by a multi-stage addition method.

The resin molded product of the present invention is obtained by molding the above resin composition by a molding method such as irregular extrusion molding, injection molding, sheet extrusion molding, vacuum molding, press molding, blow molding, injection press, gas assist molding and the like. Obtained. Depending on the combination of hues, it is possible to obtain a molded product having a marble pattern as well as a wood grain pattern. The resin molded product of the present invention obtained by the above-mentioned molding method, utilizing its excellent properties, is used in housing-related fields such as OA / home appliances field, vehicle / ship field, furniture / building material field, sanitary field, toys / sports goods. It can be used in a wide range of fields such as fields and miscellaneous goods.

[0032]

EXAMPLES Hereinafter, the present invention will be further described with reference to Examples and Comparative Examples.
The present invention is not limited to the following embodiments. Parts and% in Examples and Comparative Examples are based on weight unless otherwise specified. Various evaluations in Examples and Comparative Examples are values measured as follows.

Average particle size Laser size analysis system LPA- manufactured by Otsuka Electronics Co., Ltd.
The average particle size was measured using 3100. A 2 × 0.5 × 10 cm flat plate was formed by material strength extrusion molding, and a bending test was performed as a test piece to measure the breaking energy up to breaking. Test speed: 15 mm / min Molded product surface appearance A flat plate was formed by extrusion molding to obtain a test piece. The grain pattern of the surface of the obtained test piece was visually judged according to the following evaluation criteria. ；: Vivid wood grain pattern ×: Poor

The components used in the examples and comparative examples are as follows. (A) Preparation of styrenic resin Rubbery polymers (a) -1 to (a) -4; (A) of the present invention
As the rubbery polymer (a) used for the styrene resin, those shown in Table 1 were used.

[0035]

[Table 1]

Styrene resins A-1 to A-4, (b) -1
4: A monomer component was polymerized in the presence or absence of the rubbery polymers (a) -1 to (a) -4 to obtain styrene resins. Table 2 shows the structures of these resins. In Table 2, an asterisk indicates a solid content conversion. Also,
A-1 is an emulsion polymerization, and A-2 to 4, (b) -1, (b)
-3 to 4 were obtained by solution polymerization, and (b) -2 was obtained by suspension polymerization.

[0037]

[Table 2]

(B) Preparation of lubricant B-1; magnesium stearate [Sakai Chemical Industry Co., Ltd.
SM # 1000]. B-2: Stearyl stearate (Unistar M-9676, manufactured by Kao Corporation) was used. B-3: A low molecular weight polyethylene partially carboxyl-modified product (Sunwax E-250P, manufactured by Sanyo Chemical Co., Ltd.) was used.

(C) Preparation of Other Thermoplastic Resin C-1: A polycarbonate resin [Panlite L-1225 manufactured by Teijin Chemicals Ltd.] was used. C-2: Polyamide 6 [manufactured by Kanebo Co., Ltd., Kanebo nylon MC-120] was used. (D) Preparation of Dyeing / Pigment D-1: Carbon black was used. D-2: Bengala was used. D-3: Titanium yellow was used.

(E) Preparation of Cellulose-Based Material E-1 (wood flour); a crushed product mixed at a ratio of pine / tsuga = 50/50 (weight ratio), which was passed through 100 mesh was used. E-2 (cellulose fiber): PPC paper was pulverized and made into a fibrous form. (F) Preparation of inorganic filler F-1; Talc [Micro Ace K, manufactured by Nippon Talc Co., Ltd.
1] was used. F-2: Light calcium carbonate [Maruo Calcium Co., Ltd.]
Manufactured).

Examples 1-28, Comparative Examples 1-9 Each of the above-mentioned components was dried to a moisture content of 0.1% or less, mixed according to the formulation shown in Tables 3-6, and mixed with an extruder to obtain The mixture was melt-kneaded at 200 ° C. to obtain pellets. The obtained pellets were mixed at a ratio shown in Tables 7 to 9, and a flat plate was formed by extrusion, and the material strength was measured and the grain pattern on the surface was visually determined. The results are shown in Tables 7-9.

[0042]

[Table 3]

[0043]

[Table 4]

[0044]

[Table 5]

[0045]

[Table 6]

[0046]

[Table 7]

[0047]

[Table 8]

[0048]

[Table 9]

As is clear from Tables 7 and 8, Examples 1 to 28, which are molded articles obtained from the composition of the present invention, all have clear grain patterns and are excellent in material strength. On the other hand, as is clear from Table 9, in Comparative Example 1, the amount of the component (A) of the resin composition (I) of the present invention was small outside the range of the present invention, and the amount of the component (E) used was small. Are examples outside the scope of the present invention, and the material strength is inferior. Comparative Example 2 is an example in which the amount of the component (A) used in the resin composition (I) of the present invention is small outside the range of the present invention, and the amount of the component (F) used is large outside the range of the present invention. Poor material strength. Comparative Examples 3 and 5 are examples in which the amount of the component (B) of the resin composition (I) of the present invention is small outside the range of the present invention, and a clear grain pattern cannot be obtained. Comparative Example 4 was an example in which the amount of the component (B) used in the resin composition (I) of the present invention was outside the range of the present invention, and melt kneading was not possible. Comparative Example 6 shows that the amount of the component (C) used in the resin composition (II) of the present invention was large outside the scope of the present invention,
This is an example in which the amount of the component (D) used is small outside the range of the present invention, and a clear grain pattern cannot be obtained. Comparative Example 7 is an example in which the amount of the component (C) used in the resin composition (II) of the present invention is small outside the range of the present invention, and the amount of the component (D) used is large outside the range of the present invention. A clear grain pattern cannot be obtained. Comparative Example 8
Is an example in which the amount of the resin composition (II) of the present invention is small outside the range of the present invention, and a clear grain pattern cannot be obtained. Comparative Example 9 is an example in which the amount of the resin composition (II) of the present invention used is out of the range of the present invention, and a clear grain pattern cannot be obtained.

[0050]

Since the resin molded article having a wood grain pattern of the present invention has a vivid wood grain pattern, it can be used in a wide range of applications, for example, OA and home appliances, vehicles and ships, furniture and building materials, and other housing-related fields. It can be used in a wide range of fields such as sanitary, toys and sports goods, and other miscellaneous goods.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI C08L 23:00 83:04)

Claims (4)

[Claims] 1. An aromatic vinyl compound and, if necessary, another vinyl monomer copolymerizable with an aromatic vinyl compound in the presence or absence of (A) the rubbery polymer (a). (B) lubricants 1 to 1 with respect to 100 parts by weight of a styrene resin obtained by (co) polymerizing the monomer component (b).
Resin composition (I) 100 obtained by melt-kneading 2 parts by weight
(C) 65 to 99% by weight of a thermoplastic resin,
And (D) 35 to 1% by weight of a dye and / or pigment
The resin composition (II) obtained by melt-kneading (C) + (D) = 100% by weight is dry-blended with 0.1 to 30 parts by weight of the resin composition (II) to enable the appearance of a wood grain pattern. The resin composition characterized by the above-mentioned. 2. A resin composition (I) comprising: (A) in the presence or absence of a rubbery polymer (a),
Styrene resin 2 obtained by (co) polymerizing a monomer component (b) composed of an aromatic vinyl compound and another vinyl monomer copolymerizable with the aromatic vinyl compound if necessary
0 to 100% by weight, (E) 0 to 80% by weight of a cellulosic substance, and (F)
0 to 80% by weight of inorganic filler [however, (A) + (E)
+ (F) = 100% by weight], and 1 to 12 parts by weight of a lubricant (B) is melt-kneaded with respect to 100 parts by weight of the resin composition comprising: 3. The resin according to claim 1, wherein the lubricant (B) in the resin composition (I) is a compound having a long-chain alkyl group and a functional group and / or an ethylene copolymer. Composition. 4. A molded article having a wood pattern formed by molding the resin composition according to claim 1.