JP2001131350A - Crystalline polyolefin resin composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a crystalline polyolefin resin composition having high rigidity, heat resistance and low temperature impact resistance. SOLUTION: This resin composition comprises 60-95 pts.wt of a crystalline polyolefin resin and 5-40 pts.wt of an ethylene/α-olefin/triene copolymer rubber. The copolymer rubber has ethylene/α-olefin mole ratio of 40/60-95/5, triene content of 0.1-30 mol.% and an intrinsic viscosity 1<[η]<10 (dl/g). The triene is expressed by the general formula. (R1 and R2 are each H, methyl or ethyl; R%3 and R4 are each methyl or ethyl).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crystalline polyolefin resin composition, and more particularly, to a composition comprising a crystalline polyolefin resin and an ethylene copolymer rubber, which is excellent in rigidity and heat resistance, and has impact resistance, Particularly, the present invention relates to a crystalline polyolefin resin composition capable of providing a molded article having excellent low-temperature impact resistance.

[0002]

2. Description of the Related Art Molded articles of polyolefin resins such as polyethylene and polypropylene are used in a wide range of fields because of their excellent rigidity and heat resistance. However, among the polyolefin resins, polypropylene is crystalline and has a high glass transition temperature, so its molded product has insufficient impact resistance, especially at low temperatures, which limits its use. It had been.

[0003] Therefore, in order to improve the impact resistance of a polypropylene molded article, conventionally, polyethylene has been blended with polypropylene, or rubber-like substances such as polyisobutylene, polybutadiene and amorphous ethylene-propylene random copolymer have been used. Has been adopted.
Among them, amorphous or low-crystalline ethylene
It is common to mix a propylene random copolymer.

[0004] When a small amount of ethylene / propylene random copolymer is blended with polypropylene, the effect of improving impact resistance, especially at low temperatures, is small. Therefore, the blending amount of ethylene / propylene random copolymer is increased. That is being done. However, as the blending amount increases, the impact resistance certainly improves, but the rigidity, heat resistance, and the like inherent to polypropylene tend to decrease.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a crystalline polyolefin resin composition capable of obtaining a polyolefin molded article having high rigidity and heat resistance and having excellent impact resistance, especially at low temperatures. It is an object of the present invention to provide a product, particularly a crystalline polypropylene resin composition.

[0006]

That is, the present invention provides a polyolefin resin (A) of 60 to 95 parts by weight and an ethylene / α-olefin / triene copolymer rubber (B) 5
-40 weight parts (the total amount of (A) and (B) is 100 weight parts), and the ethylene / α-olefin / triene copolymer rubber (B) Is composed of an ethylene structural unit, an α-olefin structural unit having 3 to 20 carbon atoms, and a structural unit derived from at least one triene compound represented by the general formula (1), and (a) ethylene and α-olefin Molar ratio with olefin (ethylene / α-olefin) is 40/60 to 95/5
And the content of the (b) triene compound is 0.1
(C) The intrinsic viscosity [η] measured in decalin at 135 ° C. is in the following range: 0.1 (dl / g) <[η] <10 (dl / g) The present invention relates to a polyolefin resin composition.

[0007]

Embedded image [In the formula (1), R ¹ and R ² are each independently a hydrogen atom, a methyl group or an ethyl group, and R ³ and R ⁴ are each independently a methyl group or an ethyl group. ]

The crystalline polyolefin resin (A) is preferably a polypropylene resin, and the resin composition further comprises an amorphous propylene / ethylene random copolymer (C) as components (A) and (A). It is desirable to contain 5 to 15 parts by weight based on 100 parts by weight in total of B).

[0009]

Next, the crystalline polyolefin resin composition according to the present invention will be specifically described. This resin composition is basically composed of a crystalline polyolefin resin (A) and an ethylene / α-olefin / triene copolymer rubber (B).

Crystalline polyolefin resin (A) Crystalline polyolefin resin (A) used in the present invention
Is a crystalline high molecular weight solid product obtained by polymerizing one or more mono-α-olefins by either a high-pressure method or a low-pressure method. Examples of such a resin include an olefin polymer resin having an isotactic or syndiotactic structure, and a typical resin is commercially available.

Specific examples of the α-olefin include ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 1-octene, 1-decene, 3-methyl-1-butene and 2- Methyl-1-propene, 3-methyl-1-pentene, 4-methyl-1-pentene, 5-
Examples thereof include methyl-1-hexene, 3-methyl-1-hexene, vinylcyclopentene, vinylcyclohexane, and vinylnorbornene. These olefins are
They may be used alone or as a mixture of two or more. Among them, propylene or a mixed olefin composed of propylene and another olefin is preferably used.

That is, the polyolefin resin used in the present invention is preferably polypropylene, which may be a homopolymer of propylene or 10 mol of a structural unit derived from propylene and an α-olefin other than propylene. % Or less of the propylene / α-olefin copolymer. In the case of a copolymer, it may be a random type or a block type. For example, a propylene / ethylene random copolymer may be used.

When the polyolefin resin is polypropylene, the temperature is set to 230.degree. C. according to ASTM D1238.
2. Melt flow rate (MFR) measured under a load of 16 kg is usually 0.01 to 200 (g / 10 min),
It is preferably in the range of 0.05 to 100 (g / 10 minutes), more preferably 0.1 to 100 (g / 10 minutes). When the MFR is within this range, a molded article of the resin composition having good moldability and excellent mechanical strength can be obtained.

Ethylene / α-olefin / triene copolymer
Combined Rubber (B) The ethylene / α-olefin / triene copolymer rubber (B) used in the present invention is composed of ethylene and C3-C3.
It is a ternary random copolymer of an α-olefin of 20 and a triene compound, and has rubber-like properties.

Examples of the α-olefin having 3 to 20 carbon atoms include propylene, 1-butene, 1-pentene, 1-hexene, 3-methyl-1-butene and 3-methyl-1-pentene. , 3-ethyl-1-pentene, 4-
Methyl-1-pentene, 4-methyl-1-hexene,
4,4-dimethyl-1-hexene, 4,4-dimethyl-
1-pentene, 4-ethyl-1-hexene, 3-ethyl-1-hexene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-octadecene, 1-eicosene and the like. Can be Among them,
Propylene, 1-butene, 1-hexene and 1-octene are preferably used. These α-olefins can be used alone or in combination of two or more.

The triene compound is represented by the following general formula (1)
It is a compound represented by these.

[0017]

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In the formula, R ¹ and R ² are each independently a hydrogen atom, a methyl group or an ethyl group, and R ³ and R ⁴
Is each independently a methyl group or an ethyl group. Particularly, a compound in which R ³ and R ⁴ are both methyl groups is preferred.

Specific examples of the triene compound represented by the general formula (1) include compounds (2) to (5) having the following chemical structures.

[0020]

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[0021]

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[0022]

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[0023]

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Such a triene compound is disclosed in Japanese Patent Application No.
It can be synthesized by the method described in JP-A-146429. The ethylene / α-olefin / triene copolymer rubber containing this triene compound as a constitutional unit is an amorphous body having a long branched chain, and is particularly effective in improving the impact resistance of a resin composition at a low temperature. is there.

The chemical structure of this copolymer rubber is such that constitutional units derived from ethylene, α-olefin and triene compounds are respectively randomly arranged and bonded, and the main chain has a substantially linear structure. , A triene compound. Further, the triene compound is bonded to the ethylene / α-olefin / triene copolymer in a structure represented by the formula (6), for example, and this bond can be confirmed by measuring a ¹³ C-NMR spectrum. it can.

[0026]

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The fact that the copolymer rubber has a substantially linear structure and does not substantially contain a gel-like cross-linked polymer means that the copolymer rubber is dissolved in an organic solvent. ,
It can be inferred from the fact that it does not substantially contain an insoluble portion. As an example, when the intrinsic viscosity [η] is measured, this copolymer rubber is dissolved in decalin at 135 ° C., but the copolymer is completely dissolved in decalin.

The copolymer rubber (B) used in the present invention
Has the following composition and properties. (A) The copolymer composition comprises ethylene and 3 to 20 carbon atoms.
Has a molar ratio (ethylene / α-olefin) of 40/60 to 95/5, preferably 50/50.
９０90/10, more preferably 55/45 to 85/15
In the range. When the molar ratio of ethylene and α-olefin is within the above range, the glass transition point of the copolymer is at a temperature lower than the normal operating temperature range of the resin composition, so that the rubber elasticity is maintained, and the rubber is used during use. Can be treated as

(B) The content of the triene compound is 0.1
-30, preferably 1-25 mol%. When the content is within the above range, the copolymer has an appropriate branch, and a high impact resistance improving effect by the amorphous rubbery material having such a structure is given to the resin composition.

(C) The intrinsic viscosity [η] measured in decalin at 135 ° C., which is a measure of the molecular weight, is:
0.1 (dl / g) <[η] <10 (dl / g), preferably 2.0 (dl / g) <[η] <5.0 (dl)
/ G). Use of a copolymer rubber within this range provides a crystalline polyolefin resin composition having excellent processability, such as improved fluidity during injection molding.

The copolymer rubber (B) is prepared by converting ethylene, an α-olefin having 3 to 20 carbon atoms, and a triene compound represented by the general formula (1) in the presence of a catalyst containing a transition metal compound. It can be produced by terpolymerization. Examples of the catalyst include a Ziegler type or metallocene type comprising a combination of a transition metal compound such as vanadium (V), zirconium (Zr), or titanium (Ti) and an organic aluminum compound such as an organic aluminum compound or an organic aluminum oxy compound. Catalysts may be mentioned.

As a preferred catalyst, [a] a catalyst comprising a soluble vanadium compound and an organoaluminum compound, or [b] a metallocene compound of a transition metal selected from Group IVB of the periodic table, and an organoaluminum oxy compound and / or There is a catalyst comprising an ionized ionic compound.

In the presence of such a catalyst, at least the three monomers are usually copolymerized under liquid phase conditions.
The solvent used at this time may be a hydrocarbon solvent or an α-olefin such as propylene may be used as the solvent. Specific examples of the hydrocarbon solvent include pentane, hexane, heptane, octane, decane, dodecane, aliphatic hydrocarbons such as kerosene and halogen derivatives thereof, cyclohexane, methylcyclopentane, alicyclic hydrocarbons such as methylcyclohexane and the like. Examples thereof include halogen derivatives, aromatic hydrocarbons such as benzene, toluene, and xylene, and halogen derivatives such as chlorobenzene. These solvents may be used in combination.

The polymerization may be carried out in any of a batch method and a continuous method. When a combination of a soluble vanadium compound and an organoaluminum compound is employed as a catalyst, and the catalyst is used in a continuous method, the concentration of the vanadium compound is usually 0.01 to 5 mmol / liter (polymerization volume), preferably 0 to 5 mmol / liter. 0.05 to 3 mmol / l. This soluble vanadium compound is not more than 10 times the concentration of the soluble vanadium compound present in the polymerization system,
Preferably, it is supplied at a concentration of 1 to 7 times. The organoaluminum compound has a ratio of aluminum atoms to vanadium atoms in the polymerization system (Al / V).
And is supplied in an amount of 2 or more, preferably 2 to 50.

The copolymerization reaction is usually carried out at a temperature of -50.degree.
00 ° C, preferably -30 ° C to 80 ° C, pressure 50k
g / cm ² or less, preferably 20 kg / cm ² or less.

Further, as a catalyst, a metallocene compound,
When an organic aluminum oxy compound or an ionized ionic compound (also referred to as an ionic ionized compound or an ionic compound) is used, the concentration of the metallocene compound in the polymerization system is usually 0.00005 to 0.1 mmol / liter ( Polymerization volume), preferably 0.0001 to 0.0
5 mmol / l. The organoaluminum oxy compound has a ratio of aluminum atom to metallocene compound in the polymerization system (Al / transition metal) of 1 to 1000.
It is supplied in an amount of 0, preferably 10-5000. In the case of an ionized ionic compound, the molar ratio of the ionized ionic compound to the metallocene compound in the polymerization system (ionized ionic compound / metallocene compound) is 0.5 to 2
It is supplied in an amount of 0, preferably 1 to 10. When an organoaluminum compound is used in combination as required,
It is used in an amount of about 0-5 mmol / l (polymerization volume), preferably about 0-2 mmol / l.

The copolymerization reaction is usually carried out at a temperature of -20.degree.
50 ° C., preferably 0 ° C. to 120 ° C., pressure 80 kg
/ Cm ² or less, preferably 50 kg / cm ² or less.

The reaction time (average residence time in the case of a continuous process) varies depending on conditions such as the catalyst concentration and the polymerization temperature, but is usually 5 minutes to 5 hours, preferably 1 minute.
0 minutes to 3 hours. In this copolymerization, a molecular weight regulator such as hydrogen can be used. After the polymerization, the copolymer is obtained in the form of a solution. However, when the copolymer is treated by a conventional method, an ethylene / α-olefin / triene copolymer rubber is obtained.

Crystalline polyolefin resin composition The crystalline polyolefin resin composition according to the present invention contains a crystalline polyolefin resin (A) and an ethylene / α-olefin / triene copolymer rubber (B). The crystalline polyolefin resin (A) is used in a proportion of 60 to 95 parts by weight, preferably 65 to 85 parts by weight, based on 100 parts by weight of the total of (A) and (B). The polyolefin resin may be used alone or in combination of two or more. The ethylene / α-olefin / triene copolymer rubber (B) is used in an amount of 5 to 40 parts by weight, preferably 1 to 100 parts by weight based on the total amount of (A) and (B).
It is used in a proportion of 5 to 35 parts by weight. When the components (A) and (B) are mixed within the above range, a resin composition having excellent physical properties such as rigidity, heat resistance, and low-temperature impact resistance can be obtained.

The crystalline polyolefin resin composition according to the present invention further comprises, in addition to the above-mentioned crystalline polyolefin resin (A) and ethylene / α-olefin / triene copolymer rubber (B), amorphous propylene / ethylene It may be constituted by blending a random copolymer (C).
Here, the propylene / ethylene random copolymer (C)
Contains 40 to 70, preferably 55 to 65 mol% of structural units derived from propylene, and 30 to 60, preferably 35 to 45 mol% of structural units derived from ethylene. A small amount of other α-olefin such as butene may be contained.

The blending amount of the amorphous propylene / ethylene random copolymer (C) is 1% in total of (A) and (B).
5 to 15 parts by weight, preferably 5 to 15 parts by weight, per 100 parts by weight
10 parts by weight. When the component (C) is mixed within the above range, the mechanical strength at room temperature can be maintained and the impact resistance at low temperature can be improved.

Such a resin composition may optionally contain an inorganic filler in a range of 5 to 20% by weight. Specific examples of the inorganic filler include calcium carbonate, calcium silicate, clay, carion, talc, silica,
Diatomaceous earth, mica powder, asbestos, alumina, barium sulfate, aluminum sulfate, calcium sulfate, basic magnesium carbonate, molybdenum disulfide, graphite, glass fiber, glass spheres, shirasu balloon, basic magnesium sulfate whisker, calcium titanate whisker, And aluminum borate whiskers.

Further, the resin composition may be a phenol-based, phosphorus-based, sulfur-based oxidation stabilizer, a heat stabilizer, an aluminum salt of an aromatic carboxylate, an aromatic phosphate ester within a range not to impair the object of the present invention. Salts, nucleating agents such as dibenzylidene sorbitol, ultraviolet absorbers, lubricants, antistatic agents,
Additives such as flame retardants, pigments, dyes, and other polymers may be included.

The resin composition according to the present invention comprises the above-mentioned (A), (B) and, if necessary, (C), an inorganic filler, additives, etc., in a Henschel mixer, a V-type blender, a tumbler blender, a ribbon blender. And then melt-kneaded using a single-screw extruder, a multi-screw extruder, a kneader, a Banbury mixer, or the like. In particular, when a device having excellent kneading properties such as a multi-screw extruder, a kneader, and a Banbury mixer is used, a high-quality resin composition in which each component is uniformly dispersed can be obtained.

[0045]

Next, the present invention will be described with reference to examples, but the present invention is not limited to these examples.
In addition, the evaluation test method of the composition in an Example and a comparative example was performed by the method described below.

(1) Melt flow rate (MFR): A
230 ° C, 2.16 kg according to STM D1238
Measured under load. (2) Flexural modulus (FM): A flexural test was performed in accordance with ASTM D790, and the flexural modulus was measured. The test conditions were as follows. -Specimen; width: 12.7 mm, thickness: 6.4 mm, length: 127 mm-span: 100 mm-bending speed: 2 mm / min (3) Izod impact strength (IZ): ASTM D25
An impact test was performed according to No. 6 to measure the Izod impact strength. The test conditions were as follows.・ Temperature; 23 ° C. and −30 ° C. ・ Specimen; width: 12.7 mm, thickness: 6.4 mm, length: 64 mm ・ Notch was formed by machining.

(Synthesis example of triene) 4,8-dimethyl-1,4,8-decatriene (DMD) represented by the following formula (2)
T) was synthesized by the method described below.

Embedded image

In a stainless steel autoclave having a capacity of 1500 ml, 2,6-dimethyl-1,2
257 g (1.89 mol) of 3,6-octatriene, 500 ml of toluene, 6.18 g of cobalt thiocyanate
(35.2 mmol), tri-o-tolylphosphine 2
1.4 g (70.4 mmol) and a 1 mol / l triethylaluminum / toluene solution 200
ml (200 mmol of triethylaluminum) was added thereto, followed by sealing. Next, an ethylene cylinder was directly connected to the autoclave, and ethylene was introduced.
The pressure was increased to f / cm ² (gauge pressure). The autoclave was heated to 120 ° C., and the reaction was carried out for a total of 5 hours while intermittently adding the consumed ethylene. After completion of the reaction, the autoclave was cooled and opened, and the obtained reaction mixture was poured into 500 ml of water to separate an organic phase and an aqueous phase. The separated organic phase was purified and distilled using an 80-stage distillation column to obtain 4,8-dimethyl-1,
108 g of 4,8-decatriene was obtained in a yield of 36%.

The thus obtained 4,8-dimethyl-
The analysis results of 1,4,8-decatriene are shown below. (1) Boiling point: 91 ° C./20 mmHg (2) Mass spectrum analysis result: m / z 164 (M ⁺
Molecular ion peak), 149, 135, 123, 10
8, 95, 79, 67, 55, 41 (3) ¹ H-NMR spectrum (solvent: CDCl ₃ ) analysis result: absorption peak is shown below. ppm (δ) 1.55 (3H, doublet) 1.65 (6H, doublet) 2.05 (4H, multiplet) 2.75 (2H, doublet) 4.95 (2H, multiplet) 5.2 (2H, multiplet) 5.7 (1H, multiplet)

(Production Example 1 of Copolymer Rubber) (B-1) An ethylene / α-olefin / DMDT copolymer rubber was produced by the following method. First, methylaluminoxane was added to toluene at 0.75 mM in terms of aluminum, rac
-Dimethylsilylene-bis [1- (2-methyl-4-phenylindenyl)] zirconium dichloride in 0.0
This was dissolved in an amount of 025 mM to prepare a polymerization catalyst solution.

Separately, a SUS autoclave with a stirring blade having a capacity of 2 liter and sufficiently purged with nitrogen was placed at 23 ° C.
The above-mentioned 4,8-dimethyl-1,4,8-decatriene (DMDT) 17 ml and heptane 883 ml
Was charged. While rotating the stirring blade, 16 N propylene was charged into the autoclave under ice cooling. Next, the autoclave was heated to 50 ° C., and further pressurized with ethylene so that the total pressure became 8 kgf / cm ² (gauge pressure). The internal pressure of the autoclave is 88 kgf / cm ²
(Gauge pressure), the triisobutylaluminum (TIBA) 1. 1.0 ml of an OmM / ml hexane solution was injected with nitrogen. Subsequently, 3 ml of the polymerization catalyst solution prepared in advance was pressed into the autoclave with nitrogen to start polymerization.

Thereafter, the temperature of the autoclave was adjusted to 50 ° C. for 30 minutes and the pressure was set to 8 kgf /
Ethylene was directly supplied so as to be cm ² (gauge pressure). Thirty minutes after the start of the polymerization, 5 ml of methanol was charged to the autoclave with a pump to stop the polymerization, and then the autoclave was depressurized to atmospheric pressure. 2 liters of methanol was poured into the reaction solution with stirring. A rubber ball-shaped polymer obtained by combining the obtained solvents is heated at 130 ° C. for 13 hours for 60
Dry at 0 torr, ethylene, propylene, DMDT
Thus, a copolymer rubber (B-1) was obtained.

The ethylene / propylene molar ratio of this copolymer rubber was 69/31, the intrinsic viscosity [η] measured in decalin at 135 ° C. was 2.2 (dl / g), and 4,8-dimethyl-1,4 The content of 4,8-decatriene (DMDT) was 1.5 mol%. By measuring ¹ H-NMR and ¹³ C-NMR of the copolymer, it was confirmed that the structure of DMDT in the polymer was the structure represented by the formula (6).

(Production Examples 2-3 of Copolymer Rubber) (B-2) (B-3) Except that the type of α-olefin, the type and the amount of polymerization catalyst used were changed as shown in Table 1, In the same manner as in Production Example 1, ethylene-propylene-DMDT copolymer (B-
2) and an ethylene / 1-octene / DMDT copolymer (B-3) were produced. Table 1 shows the properties of the copolymer rubber.

(Production Example 4 of Copolymer Rubber) (B-4) In Production Example 1, 5-ethylidene-2-norbornene (ENB) was used in place of DMDT to determine the type and amount of polymerization catalyst used. Except having changed as shown in Table 1, it carried out similarly to manufacture example 1, and obtained copolymer rubber (B-4). Table 1 shows the properties of the copolymer rubber.

[0056]

[Table 1]

In Table 1, * 1, * 2, * 3, and * 4 are the compounds described below. * 1: rac-dimethylsilylene-bis [1- (2-
Methyl-4-phenylindenyl)] zirconium dichloride * 2: methylaluminoxane * 3: [dimethyl (t-butylamide) (tetramethyl-η ⁵ -cyclopentadienyl) silane] titanium dichloride * 4: triphenylcarbenium ( Tetrakispentafluorophenyl) borate * DMDT: 4,8-dimethyl-1,4,8-decatriene * ENB: 5-ethylidene-2-norbornene

(Example 1) MFR is 25 (g / 10 minutes)
Was mixed with 25 parts by weight of the above-mentioned ethylene / propylene / DMDT copolymer rubber (B-1) to obtain a resin composition.
The pellets were supplied to an injection molding machine (resin temperature: 200 ° C., mold temperature: 40 ° C.) to prepare an ASTM standard test piece for measuring flexural modulus and Izod impact strength, and a bending test and an impact test were performed. The test results are shown in Table 2.

(Examples 2 and 3)
A polypropylene resin composition was prepared in the same manner as in Example 1 except that (B-2) or (B-3) was used instead of (-1), and the physical properties were measured. Table 2 shows the results.

Comparative Example 1 A similar test piece was prepared from the crystalline propylene homopolymer (A) used in Example 1 by injection molding, and a bending test and an impact test were performed. The test results are shown in Table 2. Was.

Comparative Example 2 In Example 1, an ethylene / propylene / 5-ethylidene-2-norbornene copolymer rubber (B-4) was used instead of the ethylene / propylene / DMDT copolymer rubber (B-1). ) Was used to prepare a polypropylene resin composition in the same manner as in Example 1, and the physical properties were measured. The results are shown in Table 2.

Example 4 In Example 1, 75 parts by weight of propylene homopolymer (MFR: 25) (A), ethylene / propylene / DMDT copolymer rubber (B-1) 1
5 parts by weight and ethylene content of 41 mol%, 135
C., the intrinsic viscosity [η] measured in decalin is 3.0 (d
1 / g) of amorphous propylene / ethylene random copolymer (C) in an amount of 10 parts by weight [11.1 parts by weight based on 100 parts by weight of the total of components (A) and (B-1)]. A polypropylene resin composition was prepared in the same manner as in Example 1 except for the above. The physical properties of the composition were measured and are shown in Table 3.

Comparative Example 3 The procedure of Example 4 was repeated, except that the ethylene-propylene-DMDT copolymer rubber (B-1) was replaced by (B-4) used in Comparative Example 1. In the same manner as in Example 4, a polypropylene resin composition was prepared. The physical properties were measured, and the results are shown in Table 3.

[0064]

The crystalline polyolefin resin composition according to the present invention contains the crystalline polyolefin resin (A) and the ethylene / α-olefin / triene copolymer rubber (B) at a specific ratio. It is possible to provide a polyolefin molded article having excellent rigidity, heat resistance, and impact resistance, especially excellent impact resistance at low temperatures. Further, in the present invention, amorphous propylene
It is a composition containing the ethylene random copolymer (C), and can provide a molded article having high rigidity, heat resistance, and impact resistance.

[0065]

[Table 2]

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[Procedure amendment]

[Submission date] November 24, 1999 (1999.11.
24)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0026

[Correction method] Change

[Correction contents]

[0026]

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Continued on the front page F term (reference) 4J002 BB011 BB012 BB031 BB041 BB052 BB121 BB141 BB152 BB153 BB171 BK001 BP021 FD010 4J100 AA01Q AA02P AA03Q AA04Q AA07Q AA15Q AA16Q AA21A

Claims (3)

[Claims] 1. A crystalline polyolefin resin (A) 60 to 9
Resin composition containing 5 parts by weight and 5 to 40 parts by weight of ethylene / α-olefin / triene copolymer rubber (B) [the total amount of (A) and (B) is 100 parts by weight] The ethylene / α-olefin / triene copolymer rubber (B) comprises an ethylene constituent unit, an α-olefin constituent unit having 3 to 20 carbon atoms, and at least one represented by the general formula (1). (A) the molar ratio of ethylene to α-olefin (ethylene / α-olefin) is 40/60 to 95/5.
And the content of the (b) triene compound is 0.1
(C) that the intrinsic viscosity [η] measured in decalin at 135 ° C. is in the following range: 0.1 (dl / g) <[η] <10 (dl / g) Characteristic crystalline polyolefin resin composition. Embedded image [In the formula (1), R ¹ and R ² are each independently a hydrogen atom, a methyl group or an ethyl group, and R ³ and R ⁴ are each independently a methyl group or an ethyl group. ] 2. The crystalline polyolefin resin (A)
Is a polypropylene resin. The crystalline polyolefin resin composition according to claim 1, wherein 3. The resin composition according to claim 1 or 2,
A crystalline polyolefin resin containing an amorphous propylene / ethylene random copolymer (C) in an amount of 5 to 15 parts by weight based on 100 parts by weight of the total amount of the components (A) and (B). Composition.