JP3416231B2 - Molded products for vehicles obtained by blow molding - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a resin having excellent blow moldability in which a specific compound is blended to remarkably improve oxidative deterioration during air blow molding and prevent deterioration of mechanical strength. The present invention relates to a molded article using the composition.

[0002]

2. Description of the Related Art Conventional molding methods for resin molded products include injection molding, extrusion molding, compression molding,
Transfer molding method, lamination molding method, blow molding method, calendering, casting, powder molding method and the like are known, and the optimum molding method is used depending on the type of resin, the shape of the molded product and the like. The blow molding method has been mainly used for polyolefin resins, but since a large hollow molded product can be obtained by using a relatively simple device, in recent years, a rubber-reinforced resin excellent in mechanical properties than polyolefin (for example, Attempts have been made to reduce the weight by molding automotive exterior parts and electric / electronic equipment parts by air blow molding (ABS resin, AES resin), but conventional rubber-reinforced resins are subject to thermal oxidation during molding. Deterioration occurs inside the molded product,
Along with that, there is a problem that the mechanical strength is significantly reduced, which is a major obstacle to the adoption of the air blow molding method. Especially for exterior parts such as automobiles, the appearance of molded products is important for commercial value. In addition, these molded products are sometimes coated, but the appearance after coating is also important for commercial value. It is an element. The surface smoothness of the molded product is the most important for such coating,
If the surface smoothness is poor, the burden of the pretreatment process usually called sanding becomes heavy. Therefore, not only the appearance of the molded product but also the surface smoothness of the molded product is an important factor in terms of simplifying the coating process.

As a result of earnest studies by the present inventor to obtain a blow-molded article which is particularly excellent in the appearance and coatability of the molded article, an ABS / AES resin composition containing a specific compound is oxidized during air blow molding. The present invention has been accomplished by finding that a deterioration can be remarkably improved, a reduction in mechanical strength can be prevented, and a molding having an excellent appearance of a molded product and an excellent painted appearance can be obtained.

[0004]

[Means for Solving the Problems] That is, according to the present invention, a graft weight obtained by copolymerizing an ethylene-α-olefin rubbery polymer (E) with an aromatic vinyl compound (S) and a vinyl cyanide compound (A). 10 to 35% by weight of the compound (I), a graft polymer (II) 5 to 20 obtained by copolymerizing the diene rubbery polymer (B) with the aromatic vinyl compound (S) and the vinyl cyanide compound (A). % By weight, aromatic vinyl compound (S)
And a copolymer (III) obtained by copolymerizing an n-substituted maleimide compound (M) and a vinyl cyanide compound (A) 10-50
Copolymers (IV) 10 to 55 formed by copolymerizing an aromatic vinyl compound (S) and a vinyl cyanide compound (A) in a weight percentage.
Compound A represented by the following general formulas (1) and (2) per 100 parts by weight of the rubber-reinforced resin composition consisting of 1% by weight.
And a resin composition each containing 0.05 to 5 parts by weight of compound B, and a compounding ratio of compound A and compound B is compound A / compound B = 1 / 0.5 to 0.5 / 1. A molded product obtained by blow molding, which is characterized by being used.

[0005]

[Chemical 3]

[0006]

[Chemical 4]

The present invention will be described in detail below. First, the graft polymer (I) is a polymer obtained by polymerizing an ethylene-propylene rubber with an aromatic vinyl compound and a vinyl cyanide compound. The composition thereof is preferably 20 to 70% by weight of ethylene-propylene rubber, 20 to 70% by weight of aromatic vinyl compound and 10 to 60% by weight of vinyl cyanide compound.

As the ethylene-propylene rubber constituting the graft polymer (I), ethylene-propylene copolymer, dicyclopentadiene, ethylidene norbornene, 1,4-hexadiene, 1,4-cycloheptadiene, 1, An ethylene-propylene-non-conjugated diene copolymer obtained by copolymerizing a non-conjugated diene compound such as 5-cyclooctadiene can be mentioned. These copolymers can be produced by solution polymerization or the like.

The ethylene-propylene rubber in the ethylene-propylene rubber preferably has a molar ratio of 5: 1 to 1: 3. Also, ethylene-propylene-
In the non-conjugated diene copolymer, it is preferable that the role of the non-conjugated diene is 2 to 50 in terms of iodine value.

As the aromatic vinyl compound, styrene,
α-methylstyrene, o-methylstyrene, m-methylstyrene, p-methylstyrene, t-butylstyrene,
α-Methylvinyltoluene, dimethylstyrene, chlorostyrene, dichlorostyrene, bromstyrene, dibromostyrene, vinylnaphthalene and the like can be mentioned, and one or more can be used. Particularly, styrene and α-methylstyrene are preferable.

The vinyl cyanide compound may, for example, be acrylonitrile or methacrylonitrile, and one or more of them may be used. Acrylonitrile is particularly preferable.

The structure of the graft polymer (I) is not limited, but a graft polymer having a graft ratio of 20 to 100% and a weight average particle diameter of 0.05 to 5 μ is particularly preferable.

20% by weight of ethylene-propylene rubber
If it is less than 70% by weight, impact resistance is exceeded, and if it exceeds 70% by weight, workability, appearance and anisotropy are deteriorated, which is not preferable. On the other hand, if the amount of the aromatic vinyl compound is less than 20% by weight, the appearance and anisotropy are not preferable, and if it exceeds 70% by weight, the impact resistance and the appearance are poor. Also,
When the vinyl cyanide compound content is less than 10% by weight, the appearance and anisotropy are more than 60% by weight, and the thermal decomposition resistance is poor, which is not preferable. Particularly preferred is a graft polymer composed of 30 to 60% by weight of conjugated diene rubber, 30 to 55% by weight of styrene and 15 to 30% by weight of acrylonitrile.

The graft polymer (I) can be produced by a known polymerization method, that is, emulsion polymerization, bulk polymerization, suspension polymerization, solution polymerization and a combination thereof. Generally, it is obtained by polymerizing styrene and acrylonitrile in the presence of rubber. The addition order and addition method of styrene and acrylonitrile to the reaction system are not particularly limited, and any order or method (collective, continuous, divided, etc.) can be adopted.

The graft polymer (II) is a polymer obtained by polymerizing an aromatic vinyl compound and a vinyl cyanide compound on a conjugated diene rubber. As its composition, 20 to 70% by weight of conjugated diene rubber and 5 aromatic vinyl compounds are used.
-60 wt% and vinyl cyanide compound 5-40 wt% are preferred.

Examples of the conjugated diene rubber constituting the graft polymer (II) include polybutadiene, butadiene-styrene rubber and butadiene-acrylonitrile rubber. In addition, these conjugated diene rubbers can be produced by emulsion polymerization, solution polymerization, suspension polymerization, bulk polymerization, or the like.

As the aromatic vinyl compound, styrene,
α-methylstyrene, o-methylstyrene, m-methylstyrene, p-methylstyrene, t-butylstyrene,
Examples include α-methylvinyltoluene, dimethylstyrene, chlorostyrene, dichlorostyrene, bromstyrene, dibromostyrene, vinylnaphthalene, and the like, or one or more of them can be used. Particularly, styrene and α-methylstyrene are preferable.

The vinyl cyanide compound may, for example, be acrylonitrile or methacrylonitrile, and one or more of them may be used. Acrylonitrile is particularly preferable.

When the content of the conjugated diene rubber is less than 20% by weight, the impact resistance is unfavorably, and when it exceeds 70% by weight, the processability, the appearance and the anisotropy are poor. On the other hand, if the aromatic vinyl compound content is less than 25% by weight, the appearance and anisotropy are unfavorable. When the vinyl cyanide compound is less than 5% by weight, the appearance and anisotropy are 40% by weight.
If it exceeds the range, the thermal decomposition resistance deteriorates, which is not preferable. Particularly preferably, the conjugated diene rubber 30 to 60% by weight, the aromatic vinyl compound 30 to 55% by weight and the vinyl cyanide compound 1 are used.
It is a graft polymer composed of 0 to 30% by weight.

The structure of the graft polymer (II) is not limited, but the graft ratio is 50 to 100%, the intrinsic viscosity of the ungrafted polymer is 0.5 to 0.7, and the weight average particle diameter is 0.05.
Graft polymers of up to 5μ are particularly preferred.

The graft polymer (II) can be produced by a known polymerization method such as emulsion polymerization, bulk polymerization, suspension polymerization, solution polymerization and a combination thereof. Generally, it is obtained by polymerizing styrene and acrylonitrile in the presence of rubber. The addition order and addition method of styrene and acrylonitrile to the reaction system are not particularly limited, and any order or method (collective, continuous, divided, etc.) can be adopted.

The terpolymer (III) is a terpolymer obtained by polymerizing an n-substituted maleimide, an aromatic vinyl compound and a vinyl cyanide compound. As its composition,
5-40% by weight of n-substituted maleimide, 20-85% by weight of aromatic vinyl compound and 10-vinyl cyanide compound
40% by weight is preferred.

As the aromatic vinyl compound, styrene,
α-methyl styrene, o-methyl styrene, m-methyl styrene, p-methyl styrene, t-butyl styrene, α-methyl vinyl toluene, dimethyl styrene, chloro styrene, dichloro styrene, brom styrene, dibromo styrene, vinyl Naphthalene and the like can be mentioned, and one kind or two or more kinds can be used. Especially styrene, α-
Methylstyrene is preferred.

The vinyl cyanide compound may, for example, be acrylonitrile or methacrylonitrile, and one or more of them may be used. Acrylonitrile is particularly preferable.

Examples of the n-substituted maleimide compound include maleimide compounds such as maleimide, methylmaleimide, ethylmaleimide, N-phenylmaleimide, O-chloro-N-phenylmaleimide and N-cyclohexylmaleimide, and especially N-phenylmaleimide. Is preferred.

If the amount of the n-substituted maleimide is less than 5% by weight, the heat resistance will be poor, and if it exceeds 40% by weight, the strength will be inferior.
On the other hand, if the amount of the aromatic vinyl compound is less than 20% by weight, the processability is poor, and if it exceeds 85% by weight, the heat resistance is poor, which is not preferable. If the amount of the vinyl cyanide compound is less than 10% by weight, the heat resistance will be poor, and if it exceeds 40% by weight, the strength will be poor. Particularly preferably, 20-30% by weight of n-substituted maleimide, 60-70% by weight of styrene and 10-% of acrylonitrile.
It is a terpolymer composed of 20% by weight.

The terpolymer (III) can be produced by a known polymerization method,
That is, it can be produced by emulsion polymerization, bulk polymerization, suspension polymerization, solution polymerization, or a combination thereof. There is no limitation on the order of addition of each compound to the reaction system and the addition method, and any order or method (collective, continuous, division, etc.) can be adopted.

In the terpolymer (III), not only the composition ratio but also the intrinsic viscosity (30 ° C.) dimethylformamide)
Is important, and the range is preferably 0.30 to 1.00. If the intrinsic viscosity is less than 0.30, the impact resistance is 1.00
If it exceeds the range, the workability is deteriorated, which is not preferable. Particularly preferably, the intrinsic viscosity is 0.40 to 0.70.

The intrinsic viscosity can be adjusted by appropriately changing the polymerization conditions. For example, a terpolymer having a desired intrinsic viscosity can be obtained by changing the polymerization composition, the polymerization temperature, and the type and amount of the initiator and the molecular weight modifier.

The binary copolymer (IV) is a binary copolymer obtained by polymerizing an aromatic vinyl compound and a vinyl cyanide compound. Its composition is 40 to 90% by weight of an aromatic vinyl compound and 10 to 6 of a vinyl cyanide compound.
0% by weight is preferred.

As the aromatic vinyl compound, styrene,
α-methylstyrene, o-methylstyrene, m-methylstyrene, p-methylstyrene, t-butylstyrene,
α-Methylvinyltoluene, dimethylstyrene, chlorostyrene, dichlorostyrene, bromstyrene, dibromostyrene, vinylnaphthalene and the like can be mentioned, and one or more can be used. Particularly, styrene and α-methylstyrene are preferable.

The vinyl cyanide compound may, for example, be acrylonitrile or methacrylonitrile, and one or more of them may be used. Acrylonitrile is particularly preferable.

If the content of styrene is less than 40% by weight (the content of acrylonitrile exceeds 60% by weight), the processability is not preferable, and if it exceeds 90% by weight (the content of acrylonitrile is less than 10% by weight), the heat resistance is poor. Particularly preferably, styrene 60 to 7
It is a binary copolymer composed of 5% by weight and 25-40% by weight of acrylonitrile.

The binary copolymer (IV) can be produced by a known polymerization method,
That is, it can be produced by emulsion polymerization, bulk polymerization, suspension polymerization, solution polymerization, or a combination thereof. There is no limitation on the addition order and addition method of these compounds to the reaction system, and any order or method (collective,
Continuous, split, etc.) can be employed.

In the binary copolymer (IV), not only the composition ratio but also the intrinsic viscosity (30 ° C., dimethylformaldehyde) is important, and the range is 0.80 to 1. 50 is preferred. When the intrinsic viscosity is less than 0.80, drawdown property and impact resistance are unfavorable, and when it exceeds 1.50, workability is deteriorated, which is not preferable. Particularly preferably, the intrinsic viscosity is 0.90 to 1.20.

The intrinsic viscosity can be adjusted by appropriately changing the polymerization conditions. For example, a binary copolymer having a desired intrinsic viscosity can be obtained by changing the polymerization composition, the polymerization temperature, and the type and amount of the initiator and the molecular weight modifier.

The composition ratio of each component constituting the rubber-reinforced resin is 10 to 35% by weight of the graft polymer (I) and 5 to 5% of the graft polymer (II) from the viewpoint of balance of physical properties of the final composition.
20% by weight, 10 to 50% by weight of the terpolymer (III) and 10 to 55% by weight of the terpolymer (IV) are preferable. If the graft polymer (I) is less than 10% by weight, the strength will be 3
If it is 5% by weight or more, the appearance and rigidity are deteriorated. If the content of the graft polymer (II) is less than 5% by weight, the coating property and low temperature impact strength will be poor, and if it is 20% by weight or more, the appearance will be poor. If the terpolymer (III) is less than 10% by weight, the heat resistance will decrease, and if it is 50% by weight or more, the strength will decrease. Binary copolymer (IV) is 1
If it is less than 0% by weight, the workability is lowered, and if it is 55% by weight or more, the heat resistance and the strength are lowered. Particularly preferably, the graft copolymer (I) is 20 to 30% by weight, and the graft copolymer (I
I) 7 to 15% by weight, terpolymer (III) 20 to 40% by weight and binary copolymer (IV) 20 to 40% by weight are preferred.

The compounds A and B, which constitute the resin composition of the present invention together with the rubber-reinforced resin, are compounds represented by the following general formulas (1) and (2).

[0039]

[Chemical 5]

[0040]

[Chemical 6]

These compounds are each contained in an amount of 0.05 to 5 parts by weight, preferably 0.1 to 100 parts by weight, based on 100 parts by weight of the rubber-reinforced resin.
~ 2 parts by weight are preferred. If the amount is less than 0.1 parts by weight, the effect of preventing oxidative deterioration cannot be obtained and the strength is lowered. Even if it is used in an amount of 5 parts by weight or more, the effect does not change and it becomes rather expensive. The compounding ratio of compound A and compound B is compound A / compound B = 1 / 0.5 to 0.5 / 1, preferably compound A
/ Compound B = 1 / 0.7 to 0.7 / 1 is preferable. If the ratio is outside this range, the effect of preventing oxidative deterioration is significantly reduced.

The compounds A and B represented by the above general formulas (1) and (2) are one type of a phenol type antioxidant and a sulfur type antioxidant, respectively.
Di-t-butyl-4-methylphenol (trademark registered Sumizer BHT), styrenated phenol (trademark registered Sumizer S), 2-t-butyl-6- (3-t-butyl-2-hydroxy-5-methylbenzyl) ) -4-Methylphenyl acrylate (trademark registered Sumilizer GM)
Other phenolic antioxidants such as dilauryl 3-
3'-thiodipropionate (trademark registered Sumilizer T
PL-R), distearyl 3-3'-thiodipropionate (trademark registered Sumilizer TPS), and other sulfur-based antioxidants, amine-based antioxidants, and phosphorus-based antioxidants have no effect. Although the mechanism of action is not clear, Compound A
Since only Compound B and Compound B act specifically on the resin composition of the present invention, it is considered to be different from the usual mechanism for preventing oxidative deterioration.

There is no limitation on the means for blending the above-mentioned compound A or compound B into the rubber-reinforced resin, and the method of adding during the production of the rubber-reinforced resin, suspension, organic solvent solution, latex or the like was obtained. Examples thereof include a method of adding to a rubber-reinforced resin and recovering it as a resin composition, a method of adding to a rubber-reinforced resin in a powder or pellet state, and melt-kneading to obtain a resin composition.

When compounded, if necessary, an antioxidant, an ultraviolet absorber, a light stabilizer, an antistatic agent, a lubricant, a dye, a pigment, a plasticizer, a flame retardant, a release agent, a glass fiber, a metal fiber,
Additives such as carbon fibers and metal flakes, reinforcing materials, and fillers can be added. Further, other thermoplastic resins such as polycarbonate, polyamide, polyacetal, polyester, polyphenylene oxide, polymethylmethacrylate, and polyvinyl chloride may be appropriately blended within a range not departing from the object of the present invention.

The present invention will be specifically described below using various resin compositions, but the present invention is not limited thereto. The numbers of parts and percentages are shown on a weight basis.

Reference Example 1: Preparation of Graft Polymer (I) Ethylene-propylene-ethylidene norbornene 3 cut into 3 mm square while stirring 300 parts of pure water in which 0.3 part of suspension stabilizer (hydroxyethyl cellulose) was dissolved. 50 parts of the original copolymer (propylene: 43%, iodine value: 25) was charged and suspended. Then, 37 parts of styrene, 13 parts of acrylonitrile, a polymerization initiator (t-dodecyl mercaptan)
0.1 part was added, and the mixture was polymerized at 100 ° C. for 10 hours in a nitrogen atmosphere. After the polymerization, water was separated and the polymer was recovered. The polymer obtained has a graft ratio of 50% and a graft ratio of 83%.
And 17% by-product copolymer having an intrinsic viscosity of 0.68.

Reference Example 2: Production of Graft Polymer (II) 30 parts of pure water in a reactor equipped with a stirrer and plate baffle,
Initiator (0.002 part of ferrous sulfate heptahydrate, 0.1 part of sodium pyrophosphate and 0.3 part of dextrose), polybutadiene latex (weight average particle size: 0.30)
After charging 50 parts of α, solid matter: 50%, emulsifier: sodium dodecylbenzenesulfonate, the inside of the reactor was replaced with nitrogen gas, and the temperature was raised to 70 ° C. with stirring. afterwards,
Styrene 35 parts, acrylonitrile 15 parts, molecular weight modifier (t-dodecyl mercaptan) 0.3 parts and pure water 2
0 parts and initiator (cumenide peroxide) 0.2
Parts and emulsifier (sodium dodecylbenzene sulfonate)
An aqueous solution consisting of 0.7 parts was continuously added over 4 hours.
Then, the polymerization was continued at 75 ° C. for another 2 hours. The obtained polymer latex was coagulated with an aqueous calcium chloride solution to give a graft ratio of 50% and a weight average particle diameter of 0.32μ.
A graft polymer (II-1) having an intrinsic viscosity of 0.61 of the ungrafted polymer was obtained. In addition, a grafting rate of 30% was obtained by adjusting the amount of the molecular weight modifier and the polymerization temperature using the same polymerization method.
A graft polymer (II-2) having an intrinsic viscosity of 0.60 of an ungrafted polymer and a graft polymer (II-3) having a graft ratio of 50% and an intrinsic viscosity of 0.32 of an ungrafted polymer were obtained.

Reference Example 3: Production of Terpolymer (III) 70 parts of pure water was added to a reactor equipped with a stirrer and a plate baffle,
0.2 parts of an initiator (potassium persulfate) and 0.1 part of an emulsifier (sodium lauryl sulfate) were charged, the inside of the reactor was replaced with nitrogen gas, and the mixture was heated with stirring to reach an internal temperature of 65 ° C. 20 parts acrylonitrile, 65 styrene at the time
Parts, N-phenylmaleimide 15 parts, molecular weight modifier (t
-Dodecyl mercaptan) 3% of the mixture was added and the temperature was raised to 70 ° C over 30 minutes. Then, an aqueous solution containing the remaining monomer mixture (97%), pure water 50 parts, initiator (potassium persulfate) 0.1 part, and emulsifier (sodium lauryl sulfate) 1 part was continuously added over 5 hours.
Then, the temperature was raised to 75 ° C. and the polymerization was continued for another 2 hours. The obtained polymer latex was coagulated with an aqueous calcium chloride solution to obtain a terpolymer. The intrinsic viscosity of the copolymer was 0.55.

Reference Example 4: Production of Copolymer (IV) After charging 120 parts of pure water and 0.3 part of potassium persulfate,
Replace the gas phase with nitrogen and heat with stirring. When the temperature in the tank reaches 68 ° C, 25 parts of acrylonitrile, 75 parts of styrene,
A mixed solution of 0.2 part of t-dodecyl mercaptan and 0.3 part of cumene hydroperoxide and an emulsifier solution in which 0.7 part of potassium oleate was dissolved in 20 parts of pure water were continuously added over 7 hours. Then, the polymerization was further continued at 70 ° C. for 3 hours. After the polymerization, the polymer was recovered using a salting-out agent. The resulting copolymer had a composition of 76% styrene and 24% acrylonitrile and an intrinsic viscosity of 0.85.

Examples 1 to 8 and Comparative Examples 1 to 10 The obtained graft polymers, copolymers and various compounds were mixed at the compounding ratio shown in Table 1 (units in the table are parts by weight) and then extruded. It was melt-kneaded in a machine and pelletized. An air spoiler molded article was molded by the blow molding method (240 ° C.) using the obtained composition, and was used for evaluation. The evaluation results are shown in Table-1.

Compounds A to D in the table are as follows. Compound A; 2,2'-methylenebis (4-methyl-6)
-Tert-butylphenol) B; 2-mercaptobenzimidazole C; 2,6-di-tert-butyl-4-methylphenol (trademark registered Sumilizer-BHT) D; 2-tert-butyl-6- (3-tertiary Butyl-2-hydroxy-5-methylbenzyl) -4-methylphenyl acrylate (trademark registered Sumilizer GM)

The evaluation method is as follows.

(1) Impact strength (kg · cm) 55 × 55 × 3-4 m cut from a spoiler molded product obtained by the air blow molding method (molding temperature 240 ° C.)
Using a test piece of m, the DuPont impact strength was measured at -30 ° C.

(2) Heat resistance (° C) Measured according to ASTM D-648.

(3) Appearance of molded product The appearance of the air blow molded product was visually evaluated. ◎… Excellent ○… Good △… Somewhat good ×… defective

(4) Surface smoothness of molded product The appearance of the air blow molded product was judged visually or by a surface roughness meter. ◎… Excellent ○… Good △… Slightly good ×… Poor

(5) Sanding property It was judged by the surface sanding time of the air blow molded product or the amount of wear by a wear tester. ◎… Excellent ○… Good △… Slightly good ×… Poor

(6) Appearance of coated product The surface appearance and image clarity of the air blow molded product after coating were visually evaluated or determined by a tension meter PGD. ◎… Excellent ○… Good △… Slightly good ×… Poor

(7) Drawdown property during blow molding With the discharge rate setting of the blow molding machine kept constant, the die nozzle of the molding machine (outer diameter φ239 mm, core diameter φ240 m)
m) The length in the longitudinal direction of the parison immediately after being extruded from the end and the length in the longitudinal direction of the parison after 5 seconds were compared and judged. Immediately after and 5 seconds after, there is no change in the length of the parison in the vertical direction, and the drawdown property is excellent. ◎… Excellent ○… Good △… Slightly good ×… Poor

(8) Recyclability The strength and appearance of the molded product obtained by repeating the process of blow molding again using the crushed pellet of the blow molded product five times were evaluated. ◎… Excellent ○… Good △… Slightly good ×… Poor

[0061]

[Table 1]

[0062]

[Table 2]

[0063]

EFFECT OF THE INVENTION Oxidative deterioration at the time of air blow molding is remarkably improved, a decrease in mechanical strength can be prevented, and a molded product having an excellent appearance of a molded product and a coated product can be obtained.

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tsutomu Tanaka 1-4-1 Chuo, Wako-shi, Saitama Honda R & D Co., Ltd. (72) Inventor Kiyoshi Ogura 2-10-1 Tsukahara, Takatsuki-shi, Osaka Sumitomo Takatsuki Laboratory, Dow Co., Ltd. (72) Inventor Junpei Kojima, 2-12-7 Higashi-Shimbashi, Minato-ku, Tokyo Sumitomo Dow Co., Ltd. Tokyo Branch (56) Reference JP-A-5-320463 (JP, A) 5-202263 (JP, A) JP 5-117487 (JP, A) JP 7-126478 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) C08L 55 / 02 C08K 5/13 C08K 5/378 C08L 25/12 C08L 51/04

Claims (3)

(57) [Claims] 1. A graft polymer (I) 10 obtained by copolymerizing an ethylene-α-olefin rubbery polymer (E) with an aromatic vinyl compound (S) and a vinyl cyanide compound (A).
˜35 wt%, 5 to 20 wt% of a graft polymer (II) obtained by copolymerizing a diene rubbery polymer (B) with an aromatic vinyl compound (S) and a vinyl cyanide compound (A), aromatic Copolymer (III) obtained by copolymerizing vinyl compound (S), n-substituted maleimide compound (M) and vinyl cyanide compound (A) 10 to 50% by weight, aromatic vinyl compound (S) and cyanide A compound A represented by the following general formulas (1) and (2) per 100 parts by weight of a rubber-reinforced resin composition comprising 10 to 55% by weight of a copolymer (IV) obtained by copolymerizing a vinyl compound (A): Compound B is 0.0 each
5 to 5 parts by weight are compounded, and the compounding ratio of compound A and compound B is compound A / compound B = 1 / 0.5 to 0.5 /
A molded article obtained by blow molding, which comprises using the resin composition of 1. [Chemical 1] [Chemical 2] 2. The graft ratio of the graft polymer (II) is 5
The molded product according to claim 1, which is 0 to 100%, and the intrinsic viscosity of the ungrafted polymer is 0.5 to 0.7. 3. An air spoiler molded article for a vehicle, which is obtained by applying a coating to the molded article according to claim 1 or 2.