JPH1060202A - Colored resin composition - Google Patents

Abstract

(57) [Problem] To provide a resin molded product having a colored pattern. SOLUTION: (A) Dye and / or pigment 0.1 to
30% by weight, at least one polymer selected from (B) an aromatic vinyl compound, a vinyl cyanide compound and a (meth) acrylic acid ester, having a polystyrene equivalent weight average molecular weight of less than 1,000,000 4 to 95% by weight
And (C) at least one polymer selected from an aromatic vinyl compound, a vinyl cyanide compound, and a (meth) acrylate ester, the polymer having a polystyrene equivalent weight average molecular weight of 1,000,000 or more. A colored resin composition containing, by weight, a difference in molecular weight between the component (B) and the component (C) of 300,000 or more.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a colored resin composition suitable for coloring (patterning) a resin unevenly.

2. Description of the Related Art Conventionally, coloring and patterning of resins have been widely performed, and among them, styrene resins have been widely used in the fields of OA, home electric appliances, vehicles, etc. because of their good coloring properties. However, depending on the field to be used, it is necessary to apply a wood grain pattern, a marble pattern, or the like. In general, a method of pasting a sheet having such a pattern after molding is performed. However, in such a method, there is a problem that the price of the sheet of the pattern is high, a problem that a process for bonding the sheets is required and the cost is increased, and a problem that the grain pattern is monotonous.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to provide a colored resin composition which is useful for imparting a wood grain pattern or a marble pattern to a resin. And

[0002]

According to the present invention, (A) 0.1 to 30% by weight of a dye and / or a pigment, (B) an aromatic vinyl compound, a vinyl cyanide compound, and a (meth) acrylic acid ester are selected. 4 to 95% by weight of at least one kind of polymer having a weight average molecular weight of less than 1,000,000 in terms of polystyrene, and (C) an aromatic vinyl compound, a vinyl cyanide compound, and a (meth) acrylate ester. At least one polymer selected from the group consisting of:
The present invention provides a colored resin composition containing 4 to 95% by weight of a polymer having a weight average molecular weight of 1,000,000 or more in terms of polystyrene and having a difference in molecular weight between the components (B) and (C) of 300,000 or more. is there.

[0003]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention include the following. (1) A resin composition obtained by mixing 0.1 to 50 parts by weight of the above colored resin composition with respect to 100 parts by weight of the thermoplastic resin (D). (2) Resin 100 containing 20 to 100% by weight of thermoplastic resin (D) and 80 to 0% by weight of cellulosic substance (E)
A resin composition comprising 0.1 to 50 parts by weight of the above colored resin composition based on parts by weight. (3) the thermoplastic resin (D) is a styrene-based resin,
The resin composition of the above (1) or (2). (4) a monomer comprising a thermoplastic resin (D) comprising an aromatic vinyl compound and another vinyl monomer copolymerizable with the aromatic vinyl compound in the presence or absence of the rubbery polymer (a); The resin composition according to the above (1) or (2), which is a styrene resin obtained by (co) polymerizing the body component (b).

The dyes and pigments of the component (A) of the present invention include known dyes, organic pigments and inorganic pigments used for coloring resins, and one or more of these can be used. Examples of the dye include basic dye-based lakes such as heterocyclic, anthraquinone, azo, perinone, and rhodamine lakes. Examples of the organic pigments include perylene-based, fluorescent whitening agents, phthalocyanine-based, quinacridone-based, azo-based such as permanent red, lake red, and first yellow, nitroso-based, and nitro-based. Of these, azo-based and phthalocyanine-based are preferably used. Inorganic pigments include zinc oxide such as zinc white, titanium yellow, titanium oxide such as titanium white, calcined, ultramarine, cobalt blue, iron oxide such as red iron, carbon black, iron sulfide, and cadmium sulfide. Examples thereof include sulfides, chromates such as lead chromate and zinc chromate, carbonates, and metal powders. Of these, iron oxides, carbon blacks, ultramarines, and the like can be preferably used.

The amount of the component (A) used in the present invention is 0.1 to 30% by weight, preferably 0.2 to 25% by weight in the colored resin composition.
%, More preferably 0.5 to 20% by weight, particularly preferably 1 to 15% by weight. If the amount used is out of the range of the present invention, a clear grain pattern cannot be obtained.

The component (B) of the present invention is at least one polymer selected from an aromatic vinyl compound, a vinyl cyanide compound and a (meth) acrylate, and has a weight average molecular weight of 100 in terms of polystyrene. Less than 10,000 polymers. Examples of the aromatic vinyl compound include styrene, t-butylstyrene, α-methylstyrene, p-methylstyrene, divinylbenzene, 1,1-diphenylstyrene, N, N-diethyl-p-aminomethylstyrene,
Examples include N, N-diethyl-p-aminoethylstyrene, vinylpyridine, vinylxylene, monochlorostyrene, dichlorostyrene, monobromostyrene, dibromostyrene, fluorostyrene, ethylstyrene, and vinylnaphthalene, with styrene and α-methylstyrene being particularly preferred. These aromatic vinyl compounds are used singly or as a mixture of two or more. Examples of the vinyl cyanide compound include acrylonitrile and methacrylonitrile, and acrylonitrile is preferable. (Meth) acrylic acid esters include methyl acrylate, ethyl acrylate,
Acrylates such as propyl acrylate, butyl acrylate, amino acrylate, hexyl acrylate, octyl acrylate, 2-ethylhexyl acrylate, cyclohexyl acrylate, dodecyl acrylate, octadecyl acrylate, phenyl acrylate, benzyl acrylate; methyl methacrylate, ethyl methacrylate, propyl methacrylate;
Examples thereof include 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. Of these, methacrylates are preferred, and methyl methacrylate is particularly preferred. These may be used alone or as a mixture of two or more. When two or more kinds are used in combination, preferable combinations are styrene / acrylonitrile copolymer, styrene / methyl methacrylate copolymer, methyl methacrylate / butyl acrylate copolymer, styrene / acrylonitrile /
It is a methyl methacrylate copolymer.

The component (B) of the present invention can obtain a clear pattern even if it contains a rubbery polymer, but a clearer pattern can be obtained without the component. As the rubbery polymer that can be used, all those that can be used for the component (D) described below can be used. The weight average molecular weight of the component (B) in terms of polystyrene is less than 1,000,000, preferably 10,000 to 500,000, more preferably 20,000 to 300,000, and particularly preferably 30,000 to 2,000.
100,000. When the weight average molecular weight exceeds 1,000,000, it is difficult to obtain a clear pattern. The amount of the component (B) used in the present invention is 4 to 94% by weight, preferably 5 to 85% by weight, and more preferably 8 to 80% by weight in the colored resin composition. If the amount used is out of the range of the present invention, a clear pattern cannot be obtained.

The component (C) of the present invention is at least one polymer selected from an aromatic vinyl compound, a vinyl cyanide compound and a (meth) acrylate, and has a weight average molecular weight of 100 in terms of polystyrene. More than 10,000 polymers. The aromatic vinyl compound, vinyl cyanide compound and (meth) acrylate used here are:
All of the components used in the component (B) can be mentioned. Styrene is particularly preferred among the aromatic vinyl compounds. Acrylonitrile is particularly preferable for the vinyl cyanide compound, and methyl methacrylate and butyl acrylate are preferable for the (meth) acrylate. These may be used alone or as a mixture of two or more. Preferred combinations when two or more types are used in combination are:
Styrene / acrylonitrile copolymer, styrene / methyl methacrylate copolymer, methyl methacrylate /
Butyl acrylate copolymer, styrene / acrylonitrile / methyl methacrylate copolymer. The component (C) of the present invention can provide a clear pattern even if it contains a rubbery polymer, but a clearer pattern can be obtained without the component. The rubbery polymers that can be used include all those described above.

The weight average molecular weight of the component (C) in terms of polystyrene is 1,000,000 or more, preferably 1.2 million to 1,000,000.
100,000, more preferably 1.5 to 9,000,000, particularly preferably 2 to 8.5 million. If the weight average molecular weight is less than 1,000,000, a clear pattern cannot be obtained. The amount of the component (C) used in the present invention is 5 to 95% by weight, preferably 10 to 94% by weight, more preferably 15 to 90% by weight in the colored resin composition. If the amount used is out of the range of the present invention, a clear pattern cannot be obtained. The difference in molecular weight between the component (B) and the component (C) of the present invention is 300,000 or more, preferably 500,000 or more, more preferably 1,000,000 or more, and particularly preferably 1.2 to 8,000,000. is there.

[0010] The colored resin composition of the present invention is produced by blending with the thermoplastic resin (D) or the thermoplastic resin composition to form a molded article having a wood grain pattern or a marble pattern. Can be. As the thermoplastic resin (D), styrene resin, polycarbonate, polyamide, polyester, polyolefin, polyacrylate, polyether resin, polyphenylene sulfide,
Examples thereof include a polyamide elastomer and a polyester elastomer. Of these, styrene resins are preferred. Among the styrenic resins, particularly preferred is a monomer comprising an aromatic vinyl compound and another vinyl monomer copolymerizable with the aromatic vinyl compound in the presence or absence of the rubbery polymer (a). Styrene resins obtained by (co) polymerizing the body component (b) are exemplified.

Examples of the rubbery polymer (a) used in the styrene resin include polybutadiene, polyisoprene, butyl rubber, styrene butadiene copolymer (styrene content is preferably 5 to 60%), styrene-isoprene copolymer. Polymer, acrylonitrile butadiene copolymer, ethylene-α-olefin copolymer, ethylene-α-olefin-polyene copolymer, silicone rubber, acrylic rubber, butadiene- (meth) acrylate copolymer, styrene-butadiene block copolymer Examples include a polymer, a styrene-isoprene block copolymer, a hydrogenated styrene-butadiene block copolymer, a hydrogenated butadiene copolymer, and an ethylene ionomer. Further, the styrene-butadiene block copolymer and the styrene-isoprene block copolymer include AB type, A
Examples include those having a BA type, a tapered type, and a radial teleblock type structure. Further, the hydrogenated butadiene-based polymer has a hydrogenated product of a block of styrene block and a styrene-butadiene random copolymer, and a hydrogenated butadiene-based polymer having a 1,2-vinyl bond content of 20 in polybutadiene. It includes a hydride of a polymer comprising a block of not more than 20% by weight and a polybutadiene block having a 1,2-vinyl bond content of more than 20% by weight. The weight ratio of ethylene to α-olefin in the ethylene-α-olefin copolymer is 95/5 to 5/5.
95, preferably 95/5 to 20/80, and more preferably 92/8 to 60/40. The Mooney viscosity (ML _{1 + 4} , 100 ° C.) of the ethylene-α-olefin is 5 to 200, preferably 5 to 100, and more preferably 5 to 50 from the viewpoint of impact resistance. The α-olefin used herein is an unsaturated hydrocarbon compound having 3 to 20 carbon atoms, and specific examples thereof include propylene, butene-1, pentene-1, hexene-1, heptene-1, 4-methylbutene-1, 4- Methylpentene-1 and the like. The unsaturated group in the ethylene-α-olefin-polyene copolymer is preferably in the range of 4 to 40 in terms of iodine value. The types of dienes used are alkenyl norbornenes, cyclic dienes, and aliphatic dienes, and are preferably 5-ethylidene-2-norbornene and dicyclopentadiene. These rubbery polymers are used alone or in combination of two or more. When the styrene resin contains rubber, the proportion of the rubbery polymer is preferably 3 to 80% by weight, more preferably 5 to 80% by weight.
60% by weight. The preferred graft ratio is 10 to 200.
% By weight.

On the other hand, aromatic vinyl compounds constituting the monomer component include styrene, t-butylstyrene, α-methylstyrene, p-methylstyrene, divinylbenzene, 1,1-diphenylstyrene, N, N-diethyl-p-aminomethylstyrene, Examples include N, N-diethyl-p-aminoethylstyrene, vinylpyridine, vinylxylene, monochlorostyrene, dichlorostyrene, monobromostyrene, dibromostyrene, fluorostyrene, ethylstyrene, and vinylnaphthalene, with styrene and α-methylstyrene being particularly preferred. These aromatic vinyl compounds are used singly or as a mixture of two or more. Further, as other vinyl monomers, acrylonitrile, vinyl cyanide compounds such as methacrylonitrile; methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, amino acrylate, hexyl acrylate, octyl acrylate, 2-ethylhexyl acrylate, Acrylic esters such as cyclohexyl acrylate, dodecyl acrylate, octadecyl acrylate, phenyl acrylate, and benzyl acrylate; methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate, amino methacrylate, hexyl methacrylate, octyl methacrylate, 2-ethylhexyl methacrylate, cyclohexyl methacrylate, dodecyl Methacrylate Methacrylic esters such as octadecyl methacrylate, phenyl methacrylate, and benzyl methacrylate; unsaturated acid anhydrides such as maleic anhydride, itaconic anhydride and citraconic anhydride; unsaturated acids such as acrylic acid and methacrylic acid; maleimide, N-methylmaleimide Imide compounds of α, β-unsaturated dicarboxylic acids, such as N-butylmaleimide, N- (p-methylphenyl) maleimide, N-phenylmaleimide, N-cyclohexylmaleimide; epoxy group-containing unsaturated, such as glycidyl methacrylate and allyl glycidyl ether Compounds: unsaturated carboxylic amides such as acrylamide and methacrylamide; acrylamine, aminomethyl methacrylate, aminoether methacrylate, aminopropyl methacrylate, aminostyrene Amino group-containing unsaturated compounds; 3-hydroxy-1
Hydroxyl-containing unsaturated compounds such as -propene, 4-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 hydroxystyrene; vinyl oxazoline And oxazoline group-containing unsaturated compounds.

Among other vinyl monomers copolymerizable with the aromatic vinyl compound, particularly preferred are vinyl cyanide compounds, (meth) acrylates, unsaturated acid anhydrides, unsaturated acids, α And one or more monomers selected from imide compounds of .beta.-unsaturated dicarboxylic acids, unsaturated compounds having an epoxy group, and unsaturated compounds having a hydroxyl group. Specific examples of preferred other vinyl monomers copolymerizable with the aromatic vinyl compound include acrylonitrile, methacrylic acid, methyl methacrylate, butyl acrylate, maleic anhydride, N-phenylmaleimide,
Glycidyl methacrylate, 2-hydroxyethyl methacrylate and the like. Preferred as the combination of the monomer components constituting the component (A) are styrene / acrylonitrile copolymer, styrene / methyl methacrylate copolymer, styrene / N-phenylmaleimide copolymer, styrene / N-phenylmaleimide / Maleic anhydride copolymer, styrene / acrylonitrile / hydroxyl group-containing unsaturated compound copolymer, styrene /
An acrylonitrile / unsaturated acid copolymer, a styrene / acrylonitrile / epoxy group-containing copolymer, and a styrene / acrylonitrile / oxazoline group-containing unsaturated compound copolymer. The amount of the other vinyl monomer is preferably 60% by weight or less, more preferably 50% by weight or less in the monomer component. In the above-mentioned imide compound of α, β-unsaturated dicarboxylic acid, a compound obtained by post-imidization (completely or partially) of a copolymer of the above-mentioned aromatic vinyl compound and the above-mentioned unsaturated acid anhydride can also be used. The intrinsic viscosity (measured at 30 ° C. using methyl ethyl ketone as a solvent) of the methyl ethyl ketone-soluble portion of the styrene resin is preferably 0.2 to 0.8 dl / g, more preferably 0.1 to 0.8 dl / g.
3 to 0.7 dl / g. The styrene resin can be obtained by known polymerization methods such as emulsion polymerization, suspension polymerization, bulk polymerization, and solution polymerization. Particularly preferably, emulsion polymerization,
Solution polymerization.

Next, by blending the colored resin composition of the present invention with a mixture of the above thermoplastic resin (D) and (E) a cellulosic substance, the woody feeling is further improved.
(E) Cellulose-based materials include wood flour, paper, pulp,
Vegetable substances, such as peach and bagasse, and pulverized products thereof are included. (E) The shape of the cellulosic material includes all shapes such as powder and fibrous. 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 Sawdust, sawdust, wood chips, and the like, which are generated by cutting these logs and sawing them, are used. Also, for example, powders such as bamboo grass and powders such as paper, pulp, and rice husk are included. Further, delignified products of these cellulosic substances can also be used. (E) The cellulosic material is preferably used in the form of a pulverized product, particularly preferably in the form of a powder having a mesh pass of 100 mesh or less.

(E) The amount of the cellulosic material used is
It is 80% by weight or less, preferably 5 to 70% by weight, more preferably 10 to 60% by weight in the components (D) and (E). If the amount used is out of the range, a bright grain pattern cannot be obtained. Colored resin composition of the present invention ((A) + (B) +
(C)) is (D) component or (D) + (E) component is 1
0.1 to 50 parts by weight, preferably 0.2 to 30 parts by weight, more preferably 0.5 to 2 parts by weight, per 100 parts by weight.
By mixing 0 parts by weight, a resin composition having a clear pattern when formed into a molded product can be obtained.

The above resin composition is also excellent in foam molding. The foaming agent and the foaming method used here can be performed by a known method. As the foaming agent, a physical foaming agent or a chemical foaming agent can be used. As the physical foaming agent, an inorganic system such as air, carbon dioxide, and nitrogen gas, and an organic system 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. The moldability can be improved by adding a small amount of the component (C) of the present invention to the component (D) or the component (D) + (E) of the present invention. The amount used is (D) component or (D) + (E)
The component is used in an amount of 0.1 to 20 parts by weight, preferably 0.5 to 15 parts by weight, based on 100 parts by weight.

Further, the above resin composition includes glass fiber,
Carbon fiber, metal fiber, glass beads, wollastonite,
One kind of filler such as glass milled fiber, rock filler, calcium carbonate, talc, mica, kaolin, barium sulfate, graphite, molybdenum disulfide, magnesium oxide, zinc oxide whisker, potassium titanate whisker, glass balloon, ceramic balloon They can be used alone or in combination. Among these fillers, those having a fiber diameter of 6 to 60 μm and a fiber length of 30 μm or more are preferable as shapes of glass fibers and carbon fibers. These fillers include, and these can be used alone or in combination. Preferred are calcium carbonate, talc, kaolin and potassium titanate whiskers. These are usually used in the range of 1 to 200 parts by weight based on 100 parts by weight of the component (D) or the component (D) + (E).

The resin composition may contain a known coupling agent, antibacterial agent, fungicide, flame retardant, flame retardant auxiliary, antioxidant, weather (light) agent, plasticizer, silicone oil, mineral Additives such as oils and various other confidential oils, surfactants, colorants (pigments, dyes, etc.), lubricants, metal powders, antistatic agents and the like can be blended. The colored resin composition of the present invention may contain known additives such as a lubricant, a coupling agent, and a surfactant. The colored resin composition of the present invention or the above-mentioned resin composition 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. When kneading the components, the components may be kneaded at once, or may be kneaded by a multi-stage addition method.

The resin composition obtained by mixing the colored resin composition of the present invention with a thermoplastic resin can be molded by a known molding method such as a conventional extrusion molding method, sheet extrusion molding method and injection molding. In this case, it is preferable that the colored resin composition of the present invention containing (A), (B) and (C) is melt-mixed in advance and blended with the component (D) or (D) + (E). . In addition, molded articles having various colored patterns can be obtained depending on the combination of hues, and molded articles such as marble patterns as well as wood grain patterns can be obtained. Various molded products obtained by the above molding method utilize their excellent properties to make use of OA / home appliances, vehicles / ships, furniture / building materials and other housing-related fields, sanitary fields, toys / sports goods fields, and other miscellaneous goods. It can be used for a wide range of fields.

[0020]

The present invention will be specifically described below with reference to examples. In the examples, parts and% are by weight unless otherwise specified. Various evaluations in the examples are values measured as follows. The weight average molecular weight sample was dissolved in tetrahydrofuran, and determined by gel permeation chromatography (GPC) in terms of polystyrene. A flat plate was formed by extrusion molding on the surface of the molded product 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

Preparation A-1 of dyes and pigments A-1 to A-4 ; carbon black was used. A-2: Bengala was used. A-3: Titanium yellow was used. A-4: An organic pigment (red) was used.

Polymer B-1 and C-1 to 4 The monomer components were polymerized by emulsion polymerization at the composition ratios shown in Table 1 to obtain a polymer.

[0023]

[Table 1]

Preparation of rubbery polymers (a) -1 to 4 Table 2 shows the rubbery polymer (a) as a component used in the rubber-modified styrenic resin of the present invention.

[0025]

[Table 2]

Preparation of Styrenic Polymers D-1 to D-6 A monomer component is polymerized in the presence or absence of the rubbery polymers (a) -1 to (4), and the styrenic resin is converted to Obtained. Table 3 shows the compositions of these resins. Table 3
In the figures, * indicates solid content conversion. The polymer D-1 was obtained by emulsion polymerization. Polymers D-2 to D-6 were obtained by solution polymerization.

[0027]

[Table 3]

Preparation of Cellulosic Substances E-1 and E-2 (Wood Flour): A pulverized product mixed at a ratio of pine / tsuga = 50/50 (weight ratio) and passed through 100 mesh was used. E-2 (cellulose fiber): PPC paper was pulverized and made into a fibrous form. Other components F-1; Talc (Micro Ace K, manufactured by Nippon Talc Co., Ltd.)
1) was used. F-2 (lubricant): A montanic acid ester was used. F-3 (lubricant); ethylene bisstearyl amide was used. F-4 (lubricant); zinc stearate was used. F-5 (foaming agent); azodicarbonamide was used.

Examples 1 to 17 and Comparative Examples 1 to 6 Each of the above components was dried to a moisture content of 0.1% or less.
The base resin and the colored resin were mixed according to the formulations shown in Tables 4 and 5, respectively, melt-kneaded and pelletized at 180 to 200 ° C. using an extruder to obtain uncolored resin pellets and colored pellets. The obtained pellets were mixed at a ratio shown in Table 6, and a flat plate was formed by extrusion, and the grain pattern on the surface was visually determined. Table 6 shows the results.

[0029]

[Table 4]

[0030]

[Table 5]

[0031]

[Table 6]

As is clear from Table 6, Examples 1 to 17 obtained by the present invention all had clear grain patterns. On the other hand, Comparative Example 1 is an example in which the use amount of the component (B) of the present invention is small outside the range of the present invention, and a clear grain pattern cannot be obtained. Comparative Example 2 is an example in which the use amount of the component (B) of the present invention is large outside the range of the invention, and the use amount of the component (C) is small outside the range of the invention, and a clear grain pattern cannot be obtained.
Comparative Example 3 is an example in which the amount of the component (B) used in the present invention is small outside the range of the invention, and the amount of the component (C) used is large outside the range of the invention, and a clear grain pattern cannot be obtained. Comparative Example 4 is an example in which the use amount of the component (A) of the present invention is out of the range of the present invention, and a clear grain pattern cannot be obtained. Comparative Example 5 is an example in which the use amount of the component (A) of the present invention is outside the range of the present invention, and a clear grain pattern cannot be obtained. Comparative Example 6 is an example in which the component (C) is out of the range of the present invention, and a clear grain pattern cannot be obtained.

[0036]

The colored resin composition of the present invention is blended with a thermoplastic resin and molded to obtain a resin molded product having a beautiful colored pattern such as a grain pattern. Since such molded articles have a vivid colored pattern, they can be used in a wide range of applications, such as OA and home appliances, vehicles and ships, housing-related fields such as furniture and building materials, sanitary fields, toys and sports goods, and other miscellaneous goods. Can be used in a wide range of fields.

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Claims (1)

[Claims] (1) a dye and / or pigment:
30% by weight, at least one polymer selected from (B) an aromatic vinyl compound, a vinyl cyanide compound and a (meth) acrylic acid ester, having a polystyrene equivalent weight average molecular weight of less than 1,000,000 4 to 95% by weight
And (C) at least one polymer selected from an aromatic vinyl compound, a vinyl cyanide compound, and a (meth) acrylate ester, the polymer having a polystyrene equivalent weight average molecular weight of 1,000,000 or more. A colored resin composition containing, by weight, a difference in molecular weight between the component (B) and the component (C) of 300,000 or more.