JPH07285143A - Injection molded product requiring no application of coating, and manufacture thereof - Google Patents

Abstract

PURPOSE:To provide an injection molded product reguiring no application of coating and the manufacturing method thereof wherein glossiness of a surface is excellent, and it has profoundness in color without reguiring coating application even as it is injection molded. CONSTITUTION:An injection molded product is composed of (a) 50 to 95 pts.wt. of propylene resin, (b) (b-1) propylene resin wherein MFR is at most 2/3 of the propylene resin (a), (b-2) alpha-olefin polymer other than the propylene resin (a), (b-3) 5 to 40 pts.wt. of at least one kind of additive resin selected from a group consisting of them and acrylic resin, as occasion demands, a resin component consisting of (c) ethylene and alpha-olefin copolymer elastomer and (d) cyclic olefin polymer, (e) 5 to 30 pts.wt. of inorganic filler, (f) coloring agent, and, as occasion demands, (g) lubricant.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyolefin-based injection-molded article which is excellent in injection moldability, has excellent surface glossiness, has a deep color, and has a high commercial value in an unpainted state, and a method for producing the same. .

[0002]

BACKGROUND OF THE INVENTION Polyolefins such as polypropylene have been conventionally used for various purposes such as injection molding, for example. Such a polyolefin molded product often lacks surface gloss and depth of color as it is, so that a desired texture cannot be obtained in many cases. There is.

Since it is necessary to improve the adhesion of the polyolefin to the paint when the surface of the polyolefin component is coated in this way, other components are usually added to the polyolefin to form a polyolefin composition. In addition, the surface of the polyolefin molded product is preliminarily coated with a primer or subjected to a treatment such as a plasma treatment.

For example, as a polyolefin composition having improved coatability, JP-A-5-59251 discloses an ethylene / propylene block copolymer, an amorphous ethylene / propylene copolymer and an ethylene / α-olefin copolymer. A resin composition for a bumper containing a coalesced, amorphous ethylene / butene copolymer and talc is disclosed. Further, in JP-A-4-366157, a propylene / ethylene block copolymer, an ethylene / propylene copolymer rubber, polyethylene, and a modified polypropylene,
A polypropylene resin composition for automobile exteriors containing talc is disclosed, and JP-A-1-204946 discloses a propylene / ethylene block copolymer, an ethylene / propylene copolymer rubber, and ethylene / α. -A thermoplastic resin composition for an automobile bumper containing an olefin copolymer and talc is disclosed.

All of the above polyolefin resin compositions are suitable for injection molding, and molded articles have excellent coatability.
Since these molded products are premised on surface coating, surface gloss and color depth (color depth) will be insufficient if they are not coated.

[0006] As described above, the conventional polyolefin resin molded product is surface-coated to give it a texture, thereby enhancing its commercial value. Therefore, if an injection-molded product of a polyolefin resin having excellent surface gloss and deep color that does not require surface coating appears, its industrial value will be great.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned prior art, and does not require coating even when it is injection-molded, has excellent surface glossiness, and does not require coating having a deep color. It is an object of the present invention to provide a simple injection-molded article and a manufacturing method thereof.

[0008]

SUMMARY OF THE INVENTION An injection-molded article requiring no coating according to the present invention comprises: (a) a propylene resin; 50 to 95 parts by weight; and (b) (b-1) a propylene resin (a) having an MFR of the above. 2 /
A propylene resin of 3 or less, (b-2) an α-olefin polymer other than the propylene resin (a), and (b-3)
At least one selected from the group consisting of acrylic resin
It is characterized in that it is formed from a resin component consisting of 5 to 40 parts by weight of an additive resin, (e) a colorant, and (f) an inorganic filler.

The additive resin (b) as described above is preferably an acrylic resin (b-3). Further, the above resin component, together with the components (a) and (b), (c) ethylene.α-
It preferably contains an olefin copolymer elastomer, and may further contain (d) a cyclic olefin polymer, if necessary.

The injection-molded article may contain (g) a lubricant. The injection-free injection-molded article according to the present invention comprises a propylene resin (a), an inorganic filler (f), and optionally an ethylene / α-olefin copolymer elastomer (c) and a cyclic olefin polymer ( After compounding and kneading d), the resulting kneaded product is compounded and kneaded with the above-mentioned (b) additive resin, (e) colorant and, if necessary, (g) lubricant, and then injection-molded. It is preferably manufactured.

[0011]

DETAILED DESCRIPTION OF THE INVENTION The injection-free injection-molded article and the method for producing the same according to the present invention will be specifically described below.

First, the respective components forming the non-painting injection-molded article according to the present invention will be described below. (a) Propylene-based resin Examples of the propylene-based resin used in the present invention include homopolypropylene or a propylene block copolymer of propylene and a small amount, for example, 10 mol% or less of another α-olefin such as ethylene. Specific examples of the propylene block copolymer include a propylene block copolymer composed of a homopolypropylene component and an ethylene / propylene copolymer component. The ethylene / propylene copolymer component is an α-olefin other than ethylene and propylene, such as 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 1-decene, 1-dodecene, 1-. It may contain a structural unit derived from hexadecene, 4-methyl-1-pentene or the like.

Propylene resin (a) used in the present invention
Is the melt flow rate MFR measured according to ASTM D1238 (230 ° C, 2.16 kg load)
However, usually 5 to 50 g / 10 minutes, preferably 15 to 25 g / 10
Minutes.

The propylene resin (a) has a Vicat softening point of 140 to 155 ° C. and a melting point (DSC method) of 1
It is preferably 50 to 167 ° C. (b) Additive resin In the present invention, as the additive resin, (b-1) a propylene resin having an MFR of 2/3 or less of the above propylene resin (a), (b-2) the above propylene resin At least one selected from the group consisting of α-olefin polymers other than (a) and (b-3) acrylic resin is used.

As the propylene resin (b-1),
Specific examples include homopolypropylene and propylene block copolymers similar to the propylene resin (a). As the propylene resin (b-1), one having an MFR value of 2/3 or less of the MFR value of the propylene resin (a) is used, and usually 5 g / 10 minutes or less, preferably 3 g
/ 10 minutes or less is used.

(B-2) Examples of the α-olefin polymer other than the propylene resin (a) include high-density, medium-density, and low-density polyethylene. Carbon number 4 to 10 mol% or less
Examples include linear low density polyethylene (LLDPE) which is a copolymer of 20 α-olefins.

Such polyethylene melt flow rate MFR (190 ° C., 2.16 kg, ASTM D12
38) is usually 0.1 to 10 g / 1
It is desirable that the time is 0 minutes, preferably about 0.3 to 2 g / 10 minutes.

Among the above polyethylenes, a density of 0.
93 g / cm ³ or less and still more preferably used are those of 0.91 g / cm ³ or less. In addition, α-olefin polymer (b-
2) Then, 1-butene-based resin containing 1-butene as a main component such as poly 1-butene, 1-butene / propylene copolymer, poly 4-methyl-1-pentene, 4-methyl-1- 4- such as a copolymer of pentene and α-olefin having 10 to 20 carbon atoms
Methyl-1-pentene resin can also be mentioned.

(B-3) As the acrylic resin, those generally known as an acrylic resin can be widely used. Specifically, a methacrylic acid ester such as polymethylmethacrylate (PMMA) can be used. Examples thereof include (co) polymers, (co) polymers of acrylic acid esters, and copolymers of these (meth) acrylic acid esters and α-methylstyrene.

Of these, polymethylmethacrylate and the like are preferable. In the present invention, as the additive resin (b), a propylene-based resin (b-1) other than the above-mentioned propylene-based resin (a), another α-olefin polymer (b-2) and an acrylic resin (b- At least one selected from the group consisting of 3) is used, and among these, an acrylic resin (b-
3) is preferably used.

(C) Ethylene / α-olefin copolymer
Rustomer The ethylene / α-olefin copolymer elastomer (c) used in the present invention has a crystallinity of 20% or less as measured by X-ray diffractometry and is preferably amorphous.

The ethylene / α-olefin copolymer elastomer (c) according to the present invention comprises ethylene and 3 to 10 carbon atoms.
Which is a random copolymer with α-olefin of 60 to 90 mol% of an ethylene-derived component unit and 10 to 40 of an α-olefin-derived component unit of 3 to 10 carbon atoms. It is preferably contained in an amount of mol%.

Examples of the α-olefin forming the ethylene / α-olefin copolymer elastomer (c) include α-olefins having 3 to 10 carbon atoms such as propylene, 1-butene and 1-pentene. , 1-hexene,
4-methyl-1-pentene, 1-octene, 1-decene and combinations thereof. 3 of these
~ 6 are preferred.

In the present invention, particularly preferred ethylene.α-
Examples of the olefin copolymer elastomer include ethylene / propylene random copolymer and ethylene / 1-butene random copolymer.

The ethylene / α-olefin copolymer elastomer (c) used in the present invention contains a constitutional unit derived from another polymerizable monomer as long as the characteristics of the present invention are not impaired. May be.

As such other polymerizable monomer,
For example, 1,4-hexadiene, 1,6-octadiene, 2-methyl-1,5-hexadiene, 6-methyl-1,5-heptadiene,
7-methyl-1,6-octadiene, cyclohexadiene, dicyclopentadiene, methyltetrahydroindene, 5-
Vinyl norbornene, 5-ethylidene-2-norbornene, 5
-Methylene-2-norbornene, 5-isopropylidene-2-norbornene, 6-chloromethyl-5-isopropylenyl-2-norbornene, 2,3-diisopropylidene-5-norbornene, 2
-Ethylidene-3-isopropylidene-5-norbornene, 2-
Examples include propenyl-2,2-norbornadiene and combinations thereof.

The ethylene / α-olefin copolymer elastomer (c) contains the structural unit derived from such a polyene in an amount of usually 10 mol% or less, preferably 5 mol% or less, more preferably 3 mol% or less. May be included.

The ethylene / α-olefin copolymer elastomer (c) used in the present invention is ASTM D123.
Melt flow rate (MFR:
230 ℃, under 2.16kg load) 0.01-100g / 10
Min, preferably 0.05 to 50 g / 10 min.

The ethylene / α-olefin copolymer elastomer (c) as described above can be produced by a conventionally known method using a Ti-based, V-based or Zr-based catalyst. (d) Cyclic Olefin Polymer The cyclic olefin polymer used in the present invention is a (co) polymer derived from a cyclic olefin represented by the following formula [I] or [II], and specifically, (a) Examples thereof include a random copolymer of ethylene and a cyclic olefin, (b) a ring-opening (co) polymer of a cyclic olefin, and (c) a hydrogenated product of the above ring-opening (co) polymer (b).

[0030]

[Chemical 1]

(In the formula [I], n is 0 or 1, and m is
Is 0 or a positive integer, q is 0 or 1, and R
^{1 to} R ¹⁸ and R ^a and R ^b are each independently a hydrogen atom, a halogen atom or a hydrocarbon group which may be substituted with a halogen, and R ^{15 to} R ¹⁸ are bonded to each other to form a monocyclic or polycyclic ring. And the monocyclic or polycyclic ring may have a double bond, and R ¹⁵ and R ¹⁶ or R ¹⁷ and R ¹⁸ form an alkylidene group. May be. )

[0032]

[Chemical 2]

(In the formula [II], p and q are 0 or a positive integer, m and n are 0, 1 or 2, and R ¹
To R ¹⁹ are each independently a hydrogen atom, a halogen atom, a hydrocarbon group which may be substituted with a halogen or an alkoxy group, wherein the carbon atom to which R ⁹ or R ¹⁰ is bonded and R ¹³ are bonded to each other. To the carbon atom to which R ¹¹ is bonded or directly to the carbon atom to which R ¹¹ is bonded through an alkylene group having 1 to 3 carbon atoms, and when n = m = 0, R ¹⁵ and R ¹² or R ^{12 15} and R ¹⁹ may combine with each other to form a monocyclic or polycyclic aromatic ring. ) Specific examples of the cyclic olefin represented by the above formula [I] or [II] are tetracyclododecene, methyltetracyclododecene, ethyltetracyclododecene, propyltetracyclododecene and dimethyltetra. Tetracyclododecene derivatives such as cyclododecene and stearyltetracyclododecene, pentacyclopentadecene, dimethylpentacyclopentadecene, pentacyclopentadecene derivatives such as ethylpentacyclopentadecene, phenyltetracyclododecene, benzyltetracyclo Examples include aryltetracyclododecene derivatives such as dodecene, biphenyltetracyclododecene, and naphthyltetracyclododecene. These may be used alone or in combination of two or more.

Among the above, the ethylene / cyclic olefin random copolymer (a) is preferably used. Further, in the present invention, a cyclic olefin polymer having an intrinsic viscosity [η] measured in decalin at 135 ° C. of 0.05 to 10 dl / g and a softening temperature (TMA) of 70 ° C. or higher is preferably used. To be

The cyclic olefin (d) as described above is
Details are described in JP-A-60-168708. (e) Colorant In the present invention, as the colorant, various known colorants such as dyes and pigments can be widely used, and particularly known organic pigments and inorganic pigments are used.

Specifically, lakes such as azo pigments, nitroso pigments, basic dyes, acid dyes and mordant dyes, organic pigments such as phthalocyanine pigments and organic fluorescent pigments, titanium oxide, zinc oxide, precipitated silica, carbon black. Inorganic pigments such as red, cadmium red, ultramarine blue, and red iron oxide.

Of these, it is usually desirable to use a pigment that exhibits a visible light color in the range of red to purple. (f) Inorganic filler In the present invention, as the inorganic filler (f), the above colorant
An inorganic compound different from (e) is used, and specific examples thereof include talc, calcium carbonate, mica, kaolin, barium sulfate, and glass fiber.

(G) Lubricant In the present invention, known lubricants are widely used, but preferably, amides, imides and butyl of higher carboxylic acids such as stearic acid, 12-hydroxystearic acid, oleic acid and lauric acid are used. Examples thereof include esters with alcohols, metal salts such as magnesium, calcium, aluminum and lithium, phosphate esters, polyethylene glycol, paraffin wax, polyethylene wax and polypropylene wax.

Of these, metal salts such as stearic acid and magnesium 12-hydroxystearate are preferably used. Injection-Molded Product The injection-molded product according to the present invention, which does not require coating, is formed from the above components.

This injection-free injection-molded article comprises a resin component containing (a) a propylene resin and (b) an additive resin as essential components, (e) a colorant, and (f) an inorganic filler. Has been formed.

The resin components forming this injection-free injection-molded article are (a) a propylene resin in an amount of 50 to 95 parts by weight, preferably 50 to 70 parts by weight, and (b) an additive resin in an amount of 5 parts by weight.
-40 parts by weight, preferably 5 to 35 parts by weight.

Further, this resin component preferably contains (c) an ethylene / α-olefin copolymer elastomer together with (a) a propylene resin and (b) an added resin, and further (d) if necessary. ) It may contain a cyclic olefin polymer.

When the cyclic olefin polymer (d) is contained in the resin component, the mechanical strength, in particular the impact strength and the rigidity are better balanced, and the surface glossiness, color depth and surface hardness (scratch) are improved. Property) and chemical resistance (gasoline resistance)
For example, a more excellent injection molded product can be formed.

The injection-free injection-molded article according to the present invention is formed from the above resin component, (e) colorant, and (f) inorganic filler, and has excellent impact resistance and rigidity. ing.
In the injection-molded injection-free molded article according to the present invention, the colorant (e) is 0.3 parts by weight based on 100 parts by weight of the above resin components.
.About.5 parts by weight, preferably 0.5 to 4 parts by weight.

In the injection-molded article according to the present invention which does not require painting,
It is desirable that the inorganic filler (f) is contained in an amount of 5 to 30 parts by weight, preferably 10 to 25 parts by weight, based on 100 parts by weight of the total of the above resin components.

This injection-molded product contains the resin component (e)
In addition to the colorant and the inorganic filler (f), a lubricant (g) may be further contained. The lubricant (g) is a resin component (a) to (d)
It is preferably contained in an amount of 0.5 to 3 parts by weight, preferably 0.5 to 2 parts by weight, based on 100 parts by weight in total.

The injection-free injection-molded article according to the present invention, which is formed from each of the components as described above, contains components (a) to (f) in the following quantitative ratios: (a) propylene resin; 50 ~ 85 parts by weight, (b) (b-1) MFR is 2 / of the above-mentioned propylene resin (a)
A propylene resin of 3 or less, (b-2) an α-olefin polymer other than the propylene resin (a), and (b-3)
At least one selected from the group consisting of acrylic resin
Seed addition resin, (c) ethylene / α-olefin copolymer elastomer;
5 to 30 parts by weight, (d) cyclic olefin polymer; 10 parts by weight or less, (e) colorant, (f) inorganic filler; 5 to 30 parts by weight, and (b) additive resin, (a) , (C), (d), (f) total 1
It is preferably contained in an amount of 5 to 35 parts by weight with respect to 00 parts by weight.

In the injection-molded article requiring no coating according to the present invention, in addition to the above-mentioned components, additives which may be generally blended in a polyolefin molded article may be blended, if necessary. . Examples of such additives include antioxidants, weathering stabilizers, ultraviolet absorbers,
Examples include flame retardants.

Production Method The injection-free injection-molded article according to the present invention is produced by injection-molding each component as described above into a desired shape. The propylene-based resin (a) and the inorganic filler (f It is preferable that the base resin is prepared by compounding and kneading with (1) and (2) to form a base resin, and then the additive resin (b) and the colorant (e) are compounded and kneaded with the base resin and then injection-molded.

In such a manufacturing method, ethylene.
The α-olefin copolymer elastomer (c) and the cyclic olefin polymer (d) are preferably kneaded together with the propylene resin (a) when the base resin is formed in advance.

The lubricant (g) is preferably kneaded with the base resin together with the additive resin (b).
It is preferable that (g) and the added resin (b) are previously blended, and this is blended with the base resin.

The above-mentioned propylene resin (a) and ethylene
When blending and kneading the α-olefin copolymer elastomer (c), the cyclic olefin polymer (d) and the inorganic filler (f), the temperature is not lower than the softening point of the propylene resin (a), preferably not lower than the melting point. It is desirable to knead uniformly. Further, when the additive resin (b) and the colorant (e) are added to the base resin thus formed and kneaded, at a temperature not lower than the softening point of the propylene resin (a), preferably not lower than the melting point. Uniform kneading is desirable.

The components kneaded in this way are usually injection-molded at a resin temperature of 200 to 250 ° C., and usually at an injection pressure of 800 to 1400 kg / cm ² , depending on the shape of the injection-molded product to be obtained. It

In the present invention, a mold having a mirror finish is not necessarily required at the time of injection molding, and an injection molded product having excellent surface gloss can be obtained without using a mold having a mirror finish.

The injection-molded article according to the present invention produced as described above has excellent surface gloss and does not require surface coating, and has a deep color. The injection-molded article according to the present invention,
It is desirable that the glossiness (gloss) is usually 70% or more, preferably 75%, and particularly preferably 78% or more.

As described above, the reason why the injection-molded article according to the present invention is so excellent in surface glossiness that it does not require surface coating and has a deep color is not clear. It is considered that this is because the excellent additive resin (b) is more ubiquitous on the skin layer side than the inner layer of the molded product.
Therefore, the injection-molded article according to the present invention that does not require painting is (a)
It is presumed that it has a structure composed of an inner layer containing a high concentration of a propylene resin as a main component of a base resin and (b) a skin layer containing a high concentration of an additive resin.

[0057]

INDUSTRIAL APPLICABILITY The injection-molded article according to the present invention which does not require painting is
Even if it is not painted, it has a good texture and high commercial value and can be used as it is as various parts. Therefore, it has a wide range of use and does not require a painting process, and is therefore economical.

[0058]

EXAMPLES The present invention will now be specifically described with reference to examples, but the present invention is not limited to these examples.

[0059]

Examples 1 to 16 Each component as shown in Table 1 and talc (manufactured by Matsumura Sangyo Co., Ltd., ET-11, average particle size 0.5 μ)
and m) were melt-kneaded at 250 ° C. to prepare a base resin. Then, further added resin as shown in Table 1,
A colorant (metallic pigment; manufactured by Tokyo Ink Co., Ltd.) and a lubricant were added in the amounts shown in Table 1 and melt-kneaded again at 250 ° C. The obtained resin composition was injection-molded at a resin temperature of 230 ° C. and an injection pressure of 1000 kg / cm ² to form an injection-molded product (vertical plate 100 mm × horizontal 300 mm × thickness 2 mm).

The obtained injection-molded article was evaluated for surface gloss (gloss), color depth, and injection moldability. The results are shown in Table 1. The measurement conditions are as follows. Gloss (Gloss): Measured using a variable angle gloss meter VG-1D type (manufactured by Nippon Denshoku). A parallel light beam is applied to the sample at an incident angle of 60 degrees, and the amount of specular reflection light is measured to obtain a specular gloss of 10
It is expressed as a percentage (%) when 0 is set.

Depth of color: evaluated visually. ◎… best ○… good △… normal ×… bad

Injection moldability: The moldability was evaluated by comprehensively judging the fluidity during injection molding. ◎… best ○… good △… normal ×… bad

[0063]

Comparative Example 1 An injection-molded article was obtained in the same manner as in Example 1 except that the components shown in Table 1 were replaced. The results are shown in Table 1.

[0064]

[Table 1]

[0065]

[Table 2]

Base resin (a) Propylene-based resin * 1) Propylene-based resin (1) ... propylene-ethylene-
Block copolymer (MFR = 23 g / 10 min, density 0.
91 g / cm ³ ) * 2) Propylene-based resin (2) ... Propylene homopolymer (MFR = 22 g / 10 min, density 0.91 g / cm ³ ) * 3) Propylene-based resin (3) ... Propylene homopolymer (MFR =) 40 g / 10 min, density 0.91 g / cm ³ ) * 4) Ethylene / propylene copolymer elastomer (ethylene content 81 mol%, [η] = 23 dl / g, crystallinity 5% or less) * 5) Cyclic olefin Polymer: ethylene-tetracyclododecene / random copolymer, (ethylene 70 mol%,
MFR = 40 g / 10 min, density 1.02 g / cm ³ ) Added resin * 6) Propylene resin (4) ... Propylene homopolymer (MFR = 0.5 g / 10 min, density 0.91 g / cm ³ ) * 7 ) Polyethylene (1) ... ethylene-butene copolymer with an ethylene content of 96% by weight (MFR = 2.0 g / 10 min, density 0.92 g / cm ³ ) * 8) Polyethylene (2) ... with an ethylene content of 88% by weight Ethylene / butene copolymer (MFR = 2.3 g / 10 min, density 0.90 g / cm ³ ) * 9) Polyethylene (3) ... Ethylene-4-methyl-1-pentene copolymer with an ethylene content of 98% by weight. (MFR = 2.
3 g / 10 min, density 0.94 g / cm ³ ) * 10) 4-methyl-1-pentene resin ... TPX004 (MFR = 26 g / 10 min, density 0.834 g / cm ³ ) manufactured by Mitsui Petrochemical Co., Ltd. ) * 11) Acrylic resin: Polymethylmethacrylate (Sumiteb Chemical Co., Ltd. Sumipec MM, MFR = 0.6g)
/ 10 minutes) * 12) Acrylic resin: Polymethylmethacrylate (Sumiteb Chemical Co., Ltd. Sumipec LG6, MFR = 20g)
/10 minutes)

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Claims (10)

[Claims] 1. A propylene-based resin; 50 to 95 parts by weight; and (b) (b-1) MFR is 2 / of that of the propylene-based resin (a).
A propylene resin of 3 or less, (b-2) an α-olefin polymer other than the propylene resin (a), and (b-3)
At least one selected from the group consisting of acrylic resin
A resin component consisting of 5 to 40 parts by weight of an additive resin, (e) a colorant, and (f) an inorganic filler, which does not require painting. 2. (a) Propylene-based resin; 50 to 95 parts by weight; (b) (b-1) MFR is 2 / of the above-mentioned propylene-based resin (a).
A propylene resin of 3 or less, (b-2) an α-olefin polymer other than the propylene resin (a), and (b-3)
At least one selected from the group consisting of acrylic resin
5 to 40 parts by weight of an additive resin, and (c) an ethylene / α-olefin copolymer elastomer;
An injection-molded article requiring no coating, which is formed from a resin component consisting of 5 to 30 parts by weight, (e) a colorant, and (f) an inorganic filler. 3. The non-coating injection-molded article according to claim 1, which comprises (d) a cyclic olefin polymer in an amount of 10% by weight or less. 4. A propylene-based resin; (a) a propylene-based resin; 50 to 85 parts by weight;
A propylene resin of 3 or less, (b-2) an α-olefin polymer other than the propylene resin (a), and (b-3)
At least one selected from the group consisting of acrylic resin
And (c) ethylene / α-olefin copolymer elastomer;
5 to 30 parts by weight, (d) a cyclic olefin polymer; 10 parts by weight or less, (e) a colorant, and (f) an inorganic filler; 5 to 30 parts by weight, the (b) additive resin Is the sum of (a), (c), (d), and (f) 1
An injection-molded article requiring no coating according to claim 3, which is contained in an amount of 5 to 35 parts by weight with respect to 00 parts by weight. 5. The coating according to claim 1, wherein (g) the lubricant is contained in an amount of 0.5 to 3 parts by weight with respect to 100 parts by weight of the resin component. Unnecessary injection molded products. 6. The coloring agent (e) according to claim 1, which is contained in an amount of 0.3 to 5 parts by weight based on 100 parts by weight of the resin component. An injection-molded product that does not require painting. 7. An injection-molded article requiring no coating according to any one of claims 1 to 6, which has a glossiness (gloss) of 70% or more. 8. An injection-molded article requiring no coating according to claim 1, wherein (b) the added resin is (b-3) an acrylic resin. 9. A propylene resin; 50 to 95 parts by weight; (b) an acrylic resin (b-3) as an additive resin; 5 to 40.
An injection-molded article formed from a resin component containing 1 part by weight, (e) a colorant, and (f) an inorganic filler. 10. A propylene resin, (f) an inorganic filler, (c) an ethylene / α-olefin copolymer elastomer and (d) a cyclic olefin polymer are blended and kneaded, if necessary. After that, the above-mentioned (b) addition resin was added to the obtained kneaded product.
(e) Mix and knead a colorant and (g) a lubricant as necessary,
Then, a method for producing an injection-molded article requiring no painting, which is characterized by performing injection molding.