JP6912698B2 - Polyolefin resin molded product - Google Patents

Description

The present invention relates to a polyolefin-based resin molded body having small mechanical properties such as rigidity and impact resistance, that is, a small mechanical anisotropy, and a method for producing the same. A polyolefin-based resin molded product having a small mechanical anisotropy, which is characterized by blending a specific amide-based compound with the alloy-based polyolefin-based resin, and a method for producing the same, and mechanical differences in the polyolefin-based resin molded product. The present invention relates to a method for improving the directionality, a molded product thereof, and a polyolefin-based resin composition used in the manufacturing method.

Polypropylene-based resin is a thermoplastic resin whose main raw material is propylene, and is not only a lightweight and inexpensive material compared to other general-purpose polymers, but also mechanical properties, thermal properties, and optics. It is also very excellent in terms of plasticity and is widely used in various applications. In addition, although polypropylene-based resins have sufficiently excellent performance by themselves as described above, they are often used by blending other resins in order to meet the stricter requirements in each application in various applications. As one of the typical formulations, a method of blending various elastomers is known, and it is widely used in fields such as automobile materials where flexibility and impact resistance are required. The type of elastomer is appropriately selected and used according to its purpose and application, but an olefin-based elastomer structurally similar to a polypropylene-based resin is most commonly used.

Generally, in a molding method involving a flow field such as injection molding or extrusion molding, the resin is often oriented or stretched in the molding direction to cause anisotropy. For example, with polypropylene-based resin alone, the molecular chains of the crystals are oriented in a certain direction, which lowers the impact resistance and may cause warpage or the like. Further, even in the above-mentioned blend system, it is known that, especially when forming a sea-island structure, the blended resin is extremely stretched in the flow direction, resulting in a decrease in impact resistance and the like. Therefore, in the above system, more elastomers than necessary must be used. However, in that case, although the desired flexibility and impact resistance can be obtained, the rigidity is greatly reduced, and in order to improve the rigidity, it is necessary to add a new filler or the like to make the system more complicated. Is. Therefore, there is a strong demand for an improvement method that reduces anisotropy.

The present invention relates to a polyolefin-based resin molded article having small mechanical properties such as rigidity and impact resistance, that is, a method for producing the polyolefin-based resin molded article, and mechanical anisotropy of the polyolefin-based resin molded article. An object of the present invention is to provide a polyolefin-based resin composition to be used for an improved method, a molded product thereof, and a manufacturing method.

The applicant of the present patent has reported in Japanese Patent Application No. 2010-530906 that the orientation direction of the molecular chain of a polypropylene resin can be controlled by blending a specific amide compound and molding under specific conditions. The present inventors thought that the method could be applied to the above-mentioned blend system, and as a result of further studies for the purpose of achieving the above-mentioned problems, the main components were polypropylene resin and olefin elastomer. By blending the above-mentioned amide-based compound with the polyolefin-based resin to be produced, the polypropylene-based resin is oriented in a direction perpendicular to the extending flow direction of the olefin-based elastomer, and as a result, the overall mechanicality of the polyolefin-based resin molded product is obtained. We have found that the anisotropy becomes smaller, and have completed the present invention.

That is, the present invention relates to the following polyolefin-based resin molded articles and methods for producing the same, methods for improving the mechanical anisotropy of the polyolefin-based resin molded articles, and the polyolefin-based articles used in these molded articles and manufacturing methods. It provides a resin composition.

[Item 1] A polyolefin-based resin molded product having a sea-island structure in which a polypropylene-based resin is used as a matrix and an olefin-based elastomer is used as a domain.
A polyolefin-based resin molded product characterized in that all or part of the molecular chain of the polypropylene-based resin is oriented in a direction perpendicular to the flow direction of the resin when molding.

[Item 2] In [Item 1], the two-color ratio of the absorption spectrum obtained by the polarization infrared absorption spectrum measurement is less than 1.00, and the orientation function calculated from the two-color ratio is a negative value. The polyolefin-based resin molded body according to the above.

［式中、ｎは、２〜６の整数を表す。Ｒ^１は、炭素数２〜１８の飽和若しくは不飽和の脂肪族ポリカルボン酸残基、炭素数３〜１８の脂環族ポリカルボン酸残基又は炭素数６〜１８の芳香族ポリカルボン酸残基を表す。２〜６個のＲ^２は、同一又は異なって、それぞれ、炭素数５〜３０の飽和若しくは不飽和の脂肪族アミン残基、炭素数５〜３０の脂環族アミン残基又は炭素数６〜３０の芳香族アミン残基を表す。］
一般式（２）

［式中、Ｒ^３、Ｒ^４、Ｒ^５及びＲ^６は、同一又は異なって、それぞれ、水素原子、炭素数１〜２０のアルキル基、炭素数５〜２０の置換基を有してもよいシクロアルキル基、又は炭素数６〜２０の置換基を有してもよいアリール基を表す。ただし、Ｒ^３とＲ^４、及びＲ^５とＲ^６は、それぞれ同時に水素原子を表すことはない。また、Ｒ^３とＲ^４と、又はＲ^５とＲ^６とが、それぞれ、互いに結合してアルキレン基を形成してもよい。］ [Item 3] Component (A): Polypropylene resin, Component (B): Olefin elastomer, and Component (C): Amid compound represented by the following general formula (1) and amide represented by the general formula (2). A polyolefin-based resin molded product having a sea-island structure in which a polypropylene-based resin is used as a matrix and an olefin-based elastomer is used as a domain, which contains at least one amide-based compound selected from the group consisting of based compounds.
General formula (1)

[In the formula, n represents an integer of 2 to 6. R ¹ is a saturated or unsaturated aliphatic polycarboxylic acid residue having 2 to 18 carbon atoms, an alicyclic polycarboxylic acid residue having 3 to 18 carbon atoms, or an aromatic polycarboxylic acid residue having 6 to 18 carbon atoms. Represents a group. 2-6 ^{R 2} are the same or different, respectively, saturated or unsaturated aliphatic amine residue having 5 to 30 carbon atoms, 6 to alicyclic amine residue or carbon atoms of 5 to 30 carbon atoms Represents 30 aromatic amine residues. ]
General formula (2)

[In the formula, R ³ , R ⁴ , R ⁵ and R ⁶ may have the same or different hydrogen atom, an alkyl group having 1 to 20 carbon atoms, and a substituent having 5 to 20 carbon atoms, respectively. Represents a cycloalkyl group or an aryl group which may have a substituent having 6 to 20 carbon atoms. However, R ³ and R ⁴ and R ⁵ and R ⁶ do not represent hydrogen atoms at the same time, respectively. Further, R ³ and R ⁴ or R ⁵ and R ⁶ may be bonded to each other to form an alkylene group. ]

[Item 4] The component (C) is an integer of 2 to 3 in n in the general formula (1), R ¹ is an aromatic polycarboxylic acid residue having 6 to 12 carbon atoms, and 2 to 3 R ² are. Item 3. The polyolefin-based resin molded product according to [Item 3], which is the same or different, and is an amide-based compound represented by a saturated alicyclic amine residue having 6 to 10 carbon atoms, respectively.

[Item 5] The polyolefin-based resin molded article according to [Item 3] or [Item 4], wherein the amide compound of the component (C) is an amide compound that forms β crystals with respect to a polypropylene resin.

[Item 6] The content of the component (C) is 0.001 to 10 parts by weight with respect to a total of 100 parts by weight of the contents of the component (A) and the component (B). Item 5. The polyolefin-based resin molded product according to any one of Items 5].

[Item 7] The content of the component (C) is 0.01 to 5 parts by weight with respect to a total of 100 parts by weight of the contents of the component (A) and the component (B), according to [Item 6]. Polyolefin resin molded product.

[Item 8] The polyolefin-based resin molded product according to any one of [Item 1] to [Item 7], wherein the component (B) is a copolymer elastomer of ethylene and an α-olefin having 3 to 8 carbon atoms.

[Item 9] The polyolefin-based resin molded product according to [Item 8], wherein the component (B) is an ethylene-propylene copolymer elastomer and / or an ethylene-1-butene copolymer elastomer.

[Item 10] Any of [Item 3] to [Item 9], wherein the ratio of the component (A) to the component (B) is in the range of (A) component / (B) component = 50/50 to 90/10. The polyolefin-based resin molded article described in Crab.

[Item 11] The polyolefin-based resin molding according to [Item 10], wherein the ratio of the component (A) to the component (B) is in the range of (A) component / (B) component = 60/40 to 80/20. body.

［式中、ｎは、２〜６の整数を表す。Ｒ^１は、炭素数２〜１８の飽和若しくは不飽和の脂肪族ポリカルボン酸残基、炭素数３〜１８の脂環族ポリカルボン酸残基又は炭素数６〜１８の芳香族ポリカルボン酸残基を表す。２〜６個のＲ^２は、同一又は異なって、それぞれ、炭素数５〜３０の飽和若しくは不飽和の脂肪族アミン残基、炭素数５〜３０の脂環族アミン残基又は炭素数６〜３０の芳香族アミン残基を表す。］
一般式（２）

［式中、Ｒ^３、Ｒ^４、Ｒ^５及びＲ^６は、同一又は異なって、それぞれ、水素原子、炭素数１〜２０のアルキル基、炭素数５〜２０の置換基を有してもよいシクロアルキル基、又は炭素数６〜２０の置換基を有してもよいアリール基を表す。ただし、Ｒ^３とＲ^４、及びＲ^５とＲ^６は、それぞれ同時に水素原子を表すことはない。また、Ｒ^３とＲ^４と、又はＲ^５とＲ^６とが、それぞれ、互いに結合してアルキレン基を形成してもよい。］ [Item 12] (i) A polypropylene-based resin or a polyolefin-based resin containing a polypropylene-based resin and an olefin-based elastomer as main components, an amide-based compound represented by the following general formula (1) and an amide-based resin represented by the general formula (2). At least one amide-based compound selected from the group consisting of compounds is added and heated, and the amide-based compound is dissolved in a molten polypropylene-based resin or polyolefin-based resin to obtain a melted polyolefin-based resin composition. Process,
(Ii) A step of cooling the melted polyolefin-based resin composition obtained in the step (i) to precipitate crystals of an amide-based compound, and (iii) a step of cooling the polyolefin-based resin in the step (ii). A method for producing a polyolefin-based resin molded article having low mechanical anisotropy, comprising a step of melting the resin composition in a temperature range above the melting point of the polypropylene-based resin and a temperature at which the amide-based compound does not melt by heating. ..
General formula (1)

[In the formula, n represents an integer of 2 to 6. R ¹ is a saturated or unsaturated aliphatic polycarboxylic acid residue having 2 to 18 carbon atoms, an alicyclic polycarboxylic acid residue having 3 to 18 carbon atoms, or an aromatic polycarboxylic acid residue having 6 to 18 carbon atoms. Represents a group. 2-6 ^{R 2} are the same or different, respectively, saturated or unsaturated aliphatic amine residue having 5 to 30 carbon atoms, 6 to alicyclic amine residue or carbon atoms of 5 to 30 carbon atoms Represents 30 aromatic amine residues. ]
General formula (2)

[In the formula, R ³ , R ⁴ , R ⁵ and R ⁶ may have the same or different hydrogen atom, an alkyl group having 1 to 20 carbon atoms, and a substituent having 5 to 20 carbon atoms, respectively. Represents a cycloalkyl group or an aryl group which may have a substituent having 6 to 20 carbon atoms. However, R ³ and R ⁴ and R ⁵ and R ⁶ do not represent hydrogen atoms at the same time, respectively. Further, R ³ and R ⁴ or R ⁵ and R ⁶ may be bonded to each other to form an alkylene group. ]

[Item 13] The production method according to [Item 12], wherein the crystals of the amide compound precipitated in the step (ii) are fine needle-like crystals.

[Item 14] The component (C) is an integer of 2 to 3 in n in the general formula (1), R ¹ is an aromatic polycarboxylic acid residue having 6 to 12 carbon atoms, and 2 to 3 R ² are. The production method according to [Item 12] or [Item 13], which are the same or different amide compounds represented by saturated alicyclic amine residues having 6 to 10 carbon atoms, respectively.

[Item 15] The production method according to any one of [Item 12] to [Item 14], wherein the amide compound of the component (C) is an amide compound that forms β crystals with respect to a polypropylene resin.

[Item 12] to [Item 12] to [Item 12], the content of the component (C) is 0.001 to 10 parts by weight with respect to a total of 100 parts by weight of the contents of the component (A) and the component (B). Item 15. The production method according to any one of Items 15.

[Item 17] The content of the component (C) is 0.01 to 5 parts by weight with respect to a total of 100 parts by weight of the contents of the component (A) and the component (B), according to [Item 16]. Manufacturing method.

[Item 18] The production method according to any one of [Item 12] to [Item 17], wherein the component (B) is a copolymer elastomer of ethylene and an α-olefin having 3 to 8 carbon atoms.

[Item 19] The production method according to [Item 18], wherein the component (B) is an ethylene-propylene copolymer elastomer and / or an ethylene-1-butene copolymer elastomer.

[Item 20] Any of [Item 12] to [Item 19], wherein the ratio of the component (A) to the component (B) is in the range of (A) component / (B) component = 50/50 to 90/10. The manufacturing method described in Crab.

[Item 21] The production method according to [Item 20], wherein the ratio of the component (A) to the component (B) is in the range of (A) component / (B) component = 60/40 to 80/20.

［式中、ｎは、２〜６の整数を表す。Ｒ^１は、炭素数２〜１８の飽和若しくは不飽和の脂肪族ポリカルボン酸残基、炭素数３〜１８の脂環族ポリカルボン酸残基又は炭素数６〜１８の芳香族ポリカルボン酸残基を表す。２〜６個のＲ^２は、同一又は異なって、それぞれ、炭素数５〜３０の飽和若しくは不飽和の脂肪族アミン残基、炭素数５〜３０の脂環族アミン残基又は炭素数６〜３０の芳香族アミン残基を表す。］
一般式（２）

［式中、Ｒ^３、Ｒ^４、Ｒ^５及びＲ^６は、同一又は異なって、それぞれ、水素原子、炭素数１〜２０のアルキル基、炭素数５〜２０の置換基を有してもよいシクロアルキル基、又は炭素数６〜２０の置換基を有してもよいアリール基を表す。ただし、Ｒ^３とＲ^４、及びＲ^５とＲ^６は、それぞれ同時に水素原子を表すことはない。また、Ｒ^３とＲ^４と、又はＲ^５とＲ^６とが、それぞれ、互いに結合してアルキレン基を形成してもよい。］ [Item 22] A polyolefin-based resin containing a polypropylene-based resin and an olefin-based elastomer as main components is selected from the group consisting of an amide-based compound represented by the following general formula (1) and an amide-based compound represented by the general formula (2). The mechanical anisotropy of a polyolefin-based resin molded product having a sea-island structure having a polypropylene-based resin as a matrix and an olefin-based elastomer as a domain, which is characterized by blending and molding at least one amide-based compound. How to improve.
General formula (1)

[In the formula, n represents an integer of 2 to 6. R ¹ is a saturated or unsaturated aliphatic polycarboxylic acid residue having 2 to 18 carbon atoms, an alicyclic polycarboxylic acid residue having 3 to 18 carbon atoms, or an aromatic polycarboxylic acid residue having 6 to 18 carbon atoms. Represents a group. 2-6 ^{R 2} are the same or different, respectively, saturated or unsaturated aliphatic amine residue having 5 to 30 carbon atoms, 6 to alicyclic amine residue or carbon atoms of 5 to 30 carbon atoms Represents 30 aromatic amine residues. ]
General formula (2)

[In the formula, R ³ , R ⁴ , R ⁵ and R ⁶ may have the same or different hydrogen atom, an alkyl group having 1 to 20 carbon atoms, and a substituent having 5 to 20 carbon atoms, respectively. Represents a cycloalkyl group or an aryl group which may have a substituent having 6 to 20 carbon atoms. However, R ³ and R ⁴ and R ⁵ and R ⁶ do not represent hydrogen atoms at the same time, respectively. Further, R ³ and R ⁴ or R ⁵ and R ⁶ may be bonded to each other to form an alkylene group. ]

[Item 23] A method for improving the mechanical anisotropy of a polyolefin-based resin molded product having a sea-island structure in which a polypropylene-based resin is used as a matrix and an olefin-based elastomer is used as a domain. A method for improving the mechanical anisotropy of a polyolefin-based resin molded product, which comprises orienting all or part of the resin in a direction perpendicular to the flow direction of the resin during molding.

[Item 24] Polypropylene characterized in that the two-color ratio of the absorption spectrum obtained by the polarization infrared absorption spectrum measurement is less than 1.00, and the orientation function calculated from the two-color ratio is set to a negative value. A method for improving the mechanical anisotropy of a polyolefin-based resin molded product having a sea-island structure in which a based resin is used as a matrix and an olefin-based elastomer is used as a domain.

［式中、ｎは、２〜６の整数を表す。Ｒ^１は、炭素数２〜１８の飽和若しくは不飽和の脂肪族ポリカルボン酸残基、炭素数３〜１８の脂環族ポリカルボン酸残基又は炭素数６〜１８の芳香族ポリカルボン酸残基を表す。２〜６個のＲ^２は、同一又は異なって、それぞれ、炭素数５〜３０の飽和若しくは不飽和の脂肪族アミン残基、炭素数５〜３０の脂環族アミン残基又は炭素数６〜３０の芳香族アミン残基を表す。］
一般式（２）

［式中、Ｒ^３、Ｒ^４、Ｒ^５及びＲ^６は、同一又は異なって、それぞれ、水素原子、炭素数１〜２０のアルキル基、炭素数５〜２０の置換基を有してもよいシクロアルキル基、又は炭素数６〜２０の置換基を有してもよいアリール基を表す。ただし、Ｒ^３とＲ^４、及びＲ^５とＲ^６は、それぞれ同時に水素原子を表すことはない。また、Ｒ^３とＲ^４と、又はＲ^５とＲ^６とが、それぞれ、互いに結合してアルキレン基を形成してもよい。］ [Item 25] Component (A): Polypropylene resin, Component (B): Olefin elastomer, and Component (C): Amid compound represented by the following general formula (1) and amide represented by the general formula (2). A polyolefin-based resin composition used for obtaining a polyolefin-based resin molded product having low mechanical anisotropy, which comprises at least one amide-based compound selected from the group consisting of based compounds. thing.
General formula (1)

[In the formula, n represents an integer of 2 to 6. R ¹ is a saturated or unsaturated aliphatic polycarboxylic acid residue having 2 to 18 carbon atoms, an alicyclic polycarboxylic acid residue having 3 to 18 carbon atoms, or an aromatic polycarboxylic acid residue having 6 to 18 carbon atoms. Represents a group. 2-6 ^{R 2} are the same or different, respectively, saturated or unsaturated aliphatic amine residue having 5 to 30 carbon atoms, 6 to alicyclic amine residue or carbon atoms of 5 to 30 carbon atoms Represents 30 aromatic amine residues. ]
General formula (2)

[In the formula, R ³ , R ⁴ , R ⁵ and R ⁶ may have the same or different hydrogen atom, an alkyl group having 1 to 20 carbon atoms, and a substituent having 5 to 20 carbon atoms, respectively. Represents a cycloalkyl group or an aryl group which may have a substituent having 6 to 20 carbon atoms. However, R ³ and R ⁴ and R ⁵ and R ⁶ do not represent hydrogen atoms at the same time, respectively. Further, R ³ and R ⁴ or R ⁵ and R ⁶ may be bonded to each other to form an alkylene group. ]

[Item 26] The component (C) is an integer of 2 to 3 in n in the general formula (1), R ¹ is an aromatic polycarboxylic acid residue having 6 to 12 carbon atoms, and 2 to 3 R ² are. The polyolefin-based resin composition according to [Item 25], which is the same or different, and is an amide-based compound represented by a saturated alicyclic amine residue having 6 to 10 carbon atoms, respectively.

[Item 27] The polyolefin-based resin composition according to [Item 25] or [Item 26], wherein the amide-based compound of the component (C) is an amide-based compound that forms β crystals with respect to a polypropylene-based resin.

[Item 28] [Item 25] to [Item 25], the content of the component (C) is 0.001 to 10 parts by weight with respect to a total of 100 parts by weight of the contents of the component (A) and the component (B). Item 27] The polyolefin-based resin composition according to any one of.

29. Item 28, wherein the content of the component (C) is 0.01 to 5 parts by weight with respect to a total of 100 parts by weight of the contents of the component (A) and the component (B). Polyolefin-based resin composition of.

[Item 30] The polyolefin-based resin composition according to any one of [Item 25] to [Item 29], wherein the component (B) is a copolymer elastomer of ethylene and an α-olefin having 3 to 8 carbon atoms.

[Item 31] The polyolefin-based resin composition according to [Item 30], wherein the component (B) is an ethylene-propylene copolymer elastomer and / or an ethylene-1-butene copolymer elastomer.

[Item 32] Any of [Item 25] to [Item 31], wherein the ratio of the component (A) to the component (B) is in the range of (A) component / (B) component = 50/50 to 90/10. The polyolefin-based resin composition described in Crab.

[Item 33] The polyolefin-based resin composition according to [Item 32], wherein the ratio of the component (A) to the component (B) is in the range of (A) component / (B) component = 60/40 to 80/20. thing.

By blending a specific amide compound, the polypropylene-based resin can be oriented in the direction perpendicular to the stretching direction of the olefin-based elastomer, and the anisotropy of the resulting polyolefin-based resin molded product is reduced. Mechanical properties such as impact resistance can be improved.

FIG. 1 is an SEM photograph observed in Example 1. FIG. 2 is an SEM photograph observed in Comparative Example 1. FIG. 3 is an X-ray diffraction pattern of the sheet obtained in Example 1. FIG. 4 is an X-ray diffraction pattern of the sheet obtained in Comparative Example 1. FIG. 5 is a graph of the dynamic viscoelasticity measurement results of the sheet obtained in Example 1. FIG. 6 is a graph of the dynamic viscoelasticity measurement results of the sheet obtained in Example 2. FIG. 7 is a graph of the dynamic viscoelasticity measurement results of the sheet obtained in Comparative Example 1.

<Polyolefin-based resin molded product>
The polyolefin-based resin molded product of the present invention is a polyolefin-based resin molded product having a sea-island structure in which a polypropylene-based resin is used as a matrix and an olefin-based elastomer is used as a domain, and all or part of the molecular chain of the polypropylene-based resin is olefin. It is characterized in that it is oriented in the stretching direction of the system elastomer, that is, in the direction perpendicular to the flow direction of the resin at the time of molding. By having such a structure, it is possible to improve the mechanical anisotropy of the obtained polyolefin-based resin molded product. The description of the polyolefin-based resin molded product is also a description of the polyolefin-based resin composition of the present invention, and also a description of a method for improving the rigidity and impact resistance of the polyolefin-based resin molded product of the present invention in a well-balanced manner.

The "main component" means that the total ratio of the polypropylene resin and the olefin elastomer in the polyolefin resin molded product is 60% by weight or more, preferably 70% by weight or more, and more preferably 80% by weight or more. Means that.

The above-mentioned "all or part" means that 50% or more, preferably 70% or more, more preferably 80% or more of the entire molecular chain in the polypropylene resin is oriented in the above direction.

The ratio of the polypropylene-based resin to the olefin-based elastomer contained in the polyolefin-based resin molded product varies depending on the use thereof, and is not particularly limited as long as the effect of the present invention is exhibited, but the polypropylene-based resin / It is recommended that the ratio (weight ratio) of the olefin-based elastomer is in the range of 50/50 to 90 to 10, more preferably 60/40 to 80/20.

Polypropylene resin (component (A))
The polypropylene-based resin contained in the polyolefin-based resin molded product of the present invention is a polymer containing propylene as a main constituent component, and is, for example, a polypropylene homopolymer, propylene mainly composed of propylene, and other α-olefins ( Random copolymers preferably with 2 or 4 to 20 carbon atoms, particularly preferably α-olefins with 2 or 4 to 8 carbon atoms, propylene-based propylene and other α-olefins (preferably 2 carbon atoms). Alternatively, a block copolymer with 4 to 20, particularly preferably an α-olefin having 2 or 4 to 8 carbon atoms, or a propylene-ethylene-diene multi-component copolymer mainly composed of propylene (5-ethylidene-2 as a diene). -Norbornene, 5-methylene-2-norbornene, 1,4-hexadien, etc.), a copolymer of propylene-based propylene and a small amount of styrene, comonomer such as maleic anhydride or (meth) acrylic acid, or Examples thereof include a blend polymer of the polypropylene-based resin and a small amount of thermoplastic resin.

The above-mentioned "mainly propylene" means that the propylene unit is present in the copolymer at least 50% by weight or more, preferably 70% by weight or more and less than 100% by weight, more preferably 80% by weight. More than 100% by weight is recommended.

More specifically, it is a polypropylene homopolymer or a copolymer mainly composed of propylene, and is a propylene-ethylene random copolymer, a propylene-ethylene block copolymer, a propylene-ethylene-butene-1 random copolymer, and a propylene-ethylene-butene-. 1-block copolymer, propylene-ethylene-1-pentene random copolymer, propylene-ethylene-1-pentene block copolymer, propylene-hexene-1 random copolymer, propylene-hexene-1 block copolymer, propylene-ethylene-hexene-1 random copolymer, Propylene-ethylene-4-methylpentene-1 random copolymer, propylene-ethylene-5-ethylidene-2-norbornene copolymer, propylene-ethylene-5-methylene-2-norbornene copolymer, propylene-ethylene-1,4-hexadien copolymer, Examples thereof include propylene-styrene copolymer, propylene-maleic anhydride copolymer, and propylene / (meth) acrylic acid copolymer. The above polypropylene-based resin can be used alone or in combination of two or more as appropriate.

Among these, polypropylene homopolymers, propylene-ethylene random copolymers mainly composed of propylene, and propylene-ethylene block copolymers are preferably recommended. The propylene unit in the copolymer is preferably 70% by weight or more and less than 100% by weight, more preferably 80% by weight or more and less than 100% by weight.

The polypropylene-based resin can be obtained by a conventionally known production method. As the production method, various known methods such as a slurry polymerization method using a hydrocarbon such as hexane and heptane as a solvent, a massive polymerization method using liquid propylene as a solvent, and a vapor phase method can be used. Further, as the catalyst used in such a production method, a commonly used Ziegler-Natta type catalyst, a transition metal compound (for example, a halide of titanium such as titanium trichloride and titanium tetrachloride) is used as a halogen such as magnesium chloride. Examples thereof include a catalyst system formed by combining a catalyst supported on a carrier containing magnesium oxide as a main component and an alkylaluminum compound (triethylaluminum, diethylaluminum chloride, etc.), a metallocene-based catalyst called a Kaminsky catalyst, and the like. ..

The melt flow rate of the polypropylene resin (hereinafter abbreviated as "MFR"; JIS K 6758-1981) is appropriately selected depending on the molding method and application to which it is applied, but is preferably 0.1 to 200 g / 10 minutes. More preferably, 0.3 to 150 g / 10 minutes, particularly 0.5 to 100 g / 10 minutes is recommended.

Olefin-based elastomer (component (B))
The olefin-based elastomer according to the present invention includes ethylene, propylene, 1-butene, isobutene, 1-pentene, 2-methyl-1-butene, 3-methyl-1-butene, 1-hexene and 2-methyl-1-. Co-olefins of α-olefins having 2 to 20 carbon atoms such as penten, 3-methyl-1-pentene, 4-methyl-1-pentene, 1-octene, 1-nonene, 1-decene, 1-undecene, 1-dodecene, etc. Examples thereof include a polymerized copolymer, a copolymer obtained by further copolymerizing the above-mentioned α-olefin or copolymer with a monomer such as styrene, non-conjugated diene, or vinyl acetate.

Specifically, for example, ethylene-propylene copolymer elastomer, ethylene-1-butene copolymer elastomer, ethylene-propylene-1-butene copolymer elastomer, ethylene-1-hexene copolymer elastomer, ethylene-1 -Octen copolymer elastomer, ethylene-styrene copolymer elastomer, ethylene-norbornene copolymer elastomer, propylene-1-butene copolymer elastomer, ethylene-propylene-non-conjugated diene copolymer elastomer, ethylene-1-butene -Non-conjugated diene copolymer elastomer, atypical elastic copolymer containing olefin as a main component such as ethylene-propylene-1-butene-non-conjugated diene copolymer elastomer, derivatives thereof, acid-modified derivatives and the like. be able to.

Examples of the method for producing an olefin-based elastomer include a method for producing an olefin-based elastomer using a polymerization catalyst. Examples of the polymerization catalyst include a Ziegler-Natta catalyst composed of a vanadium compound, an organic aluminum compound and a halogenated ester compound, and a group having at least one cyclopentadienyl anion skeleton at a titanium atom, a zirconium atom or a hafnium atom. Examples thereof include a catalyst in which the metallocene compound at the same position is combined with an armoxane or a boron compound, and a metallocene catalyst. Examples of the polymerization method include a method of copolymerizing in an inert organic solvent such as a hydrocarbon compound, a method of copolymerizing without using a solvent, and the like.

The density of the olefin-based elastomer is appropriately selected depending on the molding method and application to which it is applied, but the value measured in accordance with JIS-K-7112 is preferably 0.83 to 0.89 g / cm ³ , more preferably. It is recommended to be 0.85 to 0.88 g / cm ^3.

The melt flow rate of the olefin-based elastomer is appropriately selected depending on the molding method and application to which it is applied, but a value measured at 230 ° C. and a load of 2.16 kg in accordance with JIS-K-7210 is preferably 0.05 to. It is recommended that it be 30 g / 10 minutes, more preferably 1.0 to 25 g / 10 minutes.

In addition to polypropylene-based resin and olefin-based elastomer, which are the main components, the polyolefin-based resin molded body includes, for example, low-pressure polyethylene, medium-pressure polyethylene, high-pressure polyethylene, linear low-density polyethylene, and ethylene-propylene co-weight. It is possible to contain a combination, a polyolefin-based resin exemplified by poly-4-methylpentene-1, etc., a thermoplastic elastomer other than the olefin-based elastomer, and the like within the range in which the effect of the present invention is exhibited.

［式中、ｎは、２〜６の整数を表す。Ｒ^１は、炭素数２〜１８の飽和若しくは不飽和の脂肪族ポリカルボン酸残基、炭素数３〜１８の脂環族ポリカルボン酸残基又は炭素数６〜１８の芳香族ポリカルボン酸残基を表す。２〜６個のＲ^２は、同一又は異なって、それぞれ、炭素数５〜３０の飽和若しくは不飽和の脂肪族アミン残基、炭素数５〜３０の脂環族アミン残基又は炭素数６〜３０の芳香族アミン残基を表す。］
一般式（２）

［式中、Ｒ^３、Ｒ^４、Ｒ^５及びＲ^６は、同一又は異なって、それぞれ、水素原子、炭素数１〜２０のアルキル基、炭素数５〜２０の置換基を有してもよいシクロアルキル基、又は炭素数６〜２０の置換基を有してもよいアリール基を表す。ただし、Ｒ^３とＲ^４、及びＲ^５とＲ^６は、それぞれ同時に水素原子を表すことはない。また、Ｒ^３とＲ^４と、又はＲ^５とＲ^６とが、それぞれ、互いに結合してアルキレン基を形成してもよい。］ Amide compound (component (C))
The amide compound of the present invention is at least one amide compound selected from the group consisting of the amide compound represented by the following general formula (1) and the amide compound represented by the general formula (2).
General formula (1)

[In the formula, n represents an integer of 2 to 6. R ¹ is a saturated or unsaturated aliphatic polycarboxylic acid residue having 2 to 18 carbon atoms, an alicyclic polycarboxylic acid residue having 3 to 18 carbon atoms, or an aromatic polycarboxylic acid residue having 6 to 18 carbon atoms. Represents a group. 2-6 ^{R 2} are the same or different, respectively, saturated or unsaturated aliphatic amine residue having 5 to 30 carbon atoms, 6 to alicyclic amine residue or carbon atoms of 5 to 30 carbon atoms Represents 30 aromatic amine residues. ]
General formula (2)

[In the formula, R ³ , R ⁴ , R ⁵ and R ⁶ may have the same or different hydrogen atom, an alkyl group having 1 to 20 carbon atoms, and a substituent having 5 to 20 carbon atoms, respectively. Represents a cycloalkyl group or an aryl group which may have a substituent having 6 to 20 carbon atoms. However, R ³ and R ⁴ and R ⁵ and R ⁶ do not represent hydrogen atoms at the same time, respectively. Further, R ³ and R ⁴ or R ⁵ and R ⁶ may be bonded to each other to form an alkylene group. ]

Preferably, n in the general formula (1) is an integer of 2 to 4, R ¹ is a saturated aliphatic polycarboxylic acid residue having 3 to 6 carbon atoms, and an alicyclic polycarboxylic acid residue having 5 to 7 carbon atoms. group, aromatic polycarboxylic acid residue having 6 to 12 carbon atoms, and 2-4 R ^2, same or different, respectively, saturated aliphatic having 6 to 10 carbon atoms, alicyclic or aromatic Amid compounds represented by amine residues are recommended.

The "polycarboxylic acid residue" means a group remaining after removing all the carboxyl groups from the polycarboxylic acid, and the number of carbon atoms thereof represents the total number of carbon atoms of the polycarboxylic acid residue. The polycarboxylic acid is a 2 to 6-valent carboxylic acid, and the valence thereof is the same as n in the general formula (1). Further, the "amine residue" means a group remaining except for all amino groups, and the carbon number thereof represents the total carbon number of the amine residue.

More preferably, n in the general formula (1) is an integer of 2 to 3, R ¹ is an aromatic polycarboxylic acid residue having 6 to 12 carbon atoms, and 2 to 3 R ² are the same or different. An amide compound represented by a saturated alicyclic amine residue having 6 to 10 carbon atoms is recommended.

［式中、ｐは、１〜８の整数を表す。ｑは、０〜２の整数を表す。Ｒ^７は、炭素数１〜４のアルキル基を表す。］ As ^{a preferable combination of R 1} and R ^2, a combination in which R ¹ is an expression (a) to an expression (d) and R ² is an expression (e) is recommended in order to exert the effect of the present invention. .. Further, a combination in which R ¹ is an expression (a) to an expression (c) and R ² is an expression (e) is particularly preferable.

[In the formula, p represents an integer of 1-8. q represents an integer of 0 to 2. R ⁷ represents an alkyl group having 1 to 4 carbon atoms. ]

Specific examples of the amide compound represented by the general formula (1) include N, N'-dicyclohexyl-1,4-cyclohexanedicarboxyamide and N, N'-di (2-methylcyclohexyl) -1. , 4-Cyclohexanedicarboxyamide, N, N'-di (4-methylcyclohexyl) -1,4-cyclohexanedicarboxyamide, N, N'-di (2,3-dimethylcyclohexyl) -1,4-cyclohexane Dicarboxyamide, N, N'-dicyclohexyl-terephthalamide, N, N'-di (2-methylcyclohexyl) -terephthalamide, N, N'-di (3-methylcyclohexyl) -terephthalamide, N, N' -Di (4-methylcyclohexyl) -terephthalamide, N, N'-di (2,3-dimethylcyclohexyl) -terephthalamide, N, N'-di (cyclooctyl) -terephthalamide, N, N'-dicyclohexyl -2,6-naphthalenedicarboxyamide, N, N'-dicyclopentyl-2,6-naphthalenedicarboxyamide, N, N'-dicyclooctyl-2,6-naphthalenedicarboxyamide, N, N'- Dicyclododecyl-2,6-naphthalenedicarboxyamide, N, N'-di (2-methylcyclohexyl) -2,6-naphthalenedicarboxyamide, N, N'-di (3-methylcyclohexyl) -2, 6-naphthalenedicarboxyamide, N, N'-di (4-methylcyclohexyl) -2,6-naphthalenedicarboxyamide, N, N'-di (2,3-dimethylcyclohexyl) -2,6-naphthalenedi Carboxamide, N, N'-di (cyclooctyl) -2,6-naphthalenedicarboxyamide, N, N'-dicyclohexyl-2,7-naphthalenedicarboxyamide, N, N'-di (2,3-di) Dicyclohexyl) -2,7-naphthalenedicarboxyamide, N, N'-dicyclohexyl-4,4'-biphenyldicarboxyamide, N, N'-dicyclopentyl-4,4'-biphenyldicarboxyamide, N, N ´-Dicyclooctyl-4,4′-biphenyldicarboxyamide, N, N′-dicyclododecyl-4,4′-biphenyldicarboxyamide, N, N′-di (2-methylcyclohexyl) -4, 4'-biphenyldicarboxyamide, N, N'-di (3-methylcyclohexyl) -4,4'-biphenyldicarboxyamide, N, N'-di (4-methylcyclo) Hexil) -4,4'-biphenyldicarboxyamide, N, N'-di (2,3-dimethylcyclohexyl) -4,4'-biphenyldicarboxyamide, N, N'-di (cyclooctyl) -4 , 4'-biphenyldicarboxyamide, N, N'-dicyclohexyl-2,2'-biphenyldicarboxyamide, N, N'-diphenylhexanediamide, N, N'-bis (p-methylphenyl) hexanediamide, N, N'-bis (p-ethylphenyl) hexanediamide, N, N'-bis (4-cyclohexylphenyl) hexanediamide, adipate dianilide, suberic acid dianilide, trimesic acid tri (cyclohexylamide), trimesic acid tri- t-Butyl amide, Trimethic acid tri (2-methylcyclohexylamide), Trimethic acid tri (4-methylcyclohexylamide), Trimethic acid tri (2-ethylcyclohexylamide), Trimethic acid tri (4-ethylcyclohexylamide), Trimethic acid Tri (4-n-propylcyclohexylamide), trimesic acid tri (4-isopropylcyclohexylamide), trimesic acid tri (4-n-butylcyclohexylamide), trimesic acid tri (4-isobutylcyclohexylamide), trimesic acid tri (4-isobutylcyclohexylamide) 4-t-Butylcyclohexylamide), trimesic acid tri (4-sec-butylcyclohexylamide), trimesic acid tri (2,3-dimethylcyclohexylamide), trimesic acid tri (2,4-dimethylcyclohexylamide), trimesic acid Tri (benzylamide), Trimethicate tri (cycloheptyl), Trimethicate tri (3-methylcyclohexylamide), Trimethicate tri (cyclododecylamide), Trimethicate tri (1,1,3,3-tetramethylbutyl) Amide), trimesic acid tri (S (+)-1-cyclohexylethylamide), trimesic acid tri (R (+)-1-cyclohexylethylamide), trimesic acid tri (cyclooctylamide) and the like are exemplified.

Among them, N, N'-dicyclohexyl-terephthalamide, N, N'-di (2-methylcyclohexyl) -terephthalamide, N, N'-di (3-methylcyclohexyl) -terephthalamide, N, N'- Di (4-methylcyclohexyl) -terephthalamide, N, N'-di (2,3-dimethylcyclohexyl) -terephthalamide, N, N'-di (cyclooctyl) -terephthalamide, N, N'-dicyclohexyl- 2,6-naphthalenedicarboxyamide, N, N'-di (2-methylcyclohexyl) -2,6-naphthalenedicarboxyamide, N, N'-di (3-methylcyclohexyl) -2,6-naphthalenedi Carboxamide, N, N'-di (4-methylcyclohexyl) -2,6-naphthalenedicarboxyamide, N, N'-di (2,3-dimethylcyclohexyl) -2,6-naphthalenedicarboxyamide, N , N'-di (cyclooctyl) -2,6-naphthalenedicarboxyamide, N, N'-dicyclohexyl-4,4'-biphenyldicarboxyamide, N, N'-di (2-methylcyclohexyl) -4 , 4'-biphenyldicarboxyamide, N, N'-di (3-methylcyclohexyl) -4,4'-biphenyldicarboxyamide, N, N'-di (4-methylcyclohexyl) -4,4'- Biphenyldicarboxyamide, N, N'-di (2,3-dimethylcyclohexyl) -4,4'-biphenyldicarboxyamide, N, N'-di (cyclooctyl) -4,4'-biphenyldicarboxyamide Trimesic acid tri (cyclohexylamide), trimesic acid tri (2-methylcyclohexylamide), trimesic acid tri (3-methylcyclohexylamide), trimesic acid tri (4-methylcyclohexylamide), trimesic acid tri (2,3-) Dimethylcyclohexylamide) and trimethicate tri (cyclooctylamide) are recommended because they are particularly superior in the effects of the present invention.

Further, as the alkyl group of the general formula (2), an alkyl group having 1 to 20 carbon atoms, particularly an alkyl group having 1 to 18 carbon atoms is preferable. Specifically, there are a methyl group, an ethyl group, a butyl group, a hexyl group, an octyl group, a dodecyl group, an octadecyl group and the like. As the cycloalkyl group, a cycloalkyl group having 5 to 20 carbon atoms, particularly a cycloalkyl group having 5 to 14 carbon atoms is preferable. Specifically, there are a cyclopentyl group, a cyclohexyl group, a cyclooctyl group, a 4-t-butylcyclohexyl group, a 2,4-di-t-butylcyclohexyl group, a 1-adamantyl group and the like. As the aryl group, an aryl group having 6 to 20 carbon atoms, particularly an aryl group having 6 to 14 carbon atoms is recommended. Specifically, there are a phenyl group, a 1-naphthyl group, a 4-t-butylphenyl group, a 2,4-di (t-butyl) phenyl group and the like. When R ³ and R ⁴ or R ⁵ and R ⁶ are bonded to each other at the ω-end to jointly represent an alkylene group, the nitrogen atom to which ^{R 3} and R ⁴ or R ⁵ and R ^{6 are bonded.} The nitrogen-containing ring has a ring size of 5 to 8, that is, ^{an alkylene group derived from R 3} and R ⁴ or an alkylene group derived from R ⁵ and R ⁶ is carbon. Those of the number 4 to 7 are preferable. Specifically, pyrrolidine, piperidine, hexamethyleneimine and the like can be exemplified.

Specific examples of the amide compound represented by the general formula (2) include 3,9-bis [4- (N-cyclohexylcarbamoyl) phenyl] -2,4,8,10-tetraoxaspiro [ 5.5] Undecane, 3,9-bis {4- [N- (4-t-butylcyclohexyl) carbamoyl] phenyl} -2,4,8,10-tetraoxaspiro [5.5] undecane, 3, 9-bis {4- [N- (2,4-di-t-butylcyclohexyl) carbamoyl] phenyl} -2,4,8,10-tetraoxaspiro [5.5] undecane, 3,9-bis { 4- [N- (1-adamantyl) carbamoyl] phenyl} -2,4,8,10-tetraoxaspiro [5.5] undecane, 3,9-bis [4- (N-phenylcarbamoyl) phenyl]- 2,4,8,10-Tetraoxaspiro [5.5] undecane, 3,9-bis {4- [N- (4-t-butylphenyl) carbamoyl] phenyl} -2,4,8,10- Tetraoxaspiro [5.5] undecane, 3,9-bis {4- [N- (2,4-di-t-butylphenyl) carbamoyl) phenyl] -2,4,8,10-tetraoxaspiro [ 5.5] Undecane, 3,9-bis {4- [N- (1-naphthyl) carbamoyl] phenyl} -2,4,8,10-tetraoxaspiro [5.5] undecane, 3,9-bis [4- (Nn-butylcarbamoyl) phenyl] -2,4,8,10-tetraoxaspiro [5.5] undecane, 3,9-bis [4- (Nn-hexylcarbamoyl) phenyl] -2,4,8,10-tetraoxaspiro [5.5] undecane, 3,9-bis [4- (Nn-dodecylcarbamoyl) phenyl] -2,4,8,10-tetraoxaspiro [ 5.5] Undecane, 3,9-bis [4- (Nn-octadecylcarbamoyl) phenyl] -2,4,8,10-tetraoxaspiro [5.5] Undecane, 3,9-bis (4) -Carbamoylphenyl) -2,4,8,10-Tetraoxaspiro [5.5] undecane, 3,9-bis [4- (N, N-dicyclohexylcarbamoyl) phenyl] -2,4,8,10- Tetraoxaspiro [5.5] undecane, 3,9-bis [4- (N, N-diphenylcarbamoyl) phenyl] -2,4,8,10-tetraoxaspiro [5.5] undecane, 3,9 -Bis [4- (Nn-butyl-N-cyclohexy) Lucarbamoyl) phenyl] -2,4,8,10-tetraoxaspiro [5.5] undecane, 3,9-bis [4- (Nn-butyl-N-phenylcarbamoyl) phenyl] -2,4 8,10-Tetraoxaspiro [5.5] undecane, 3,9-bis [4- (1-pyrrolidinylcarbonyl) phenyl] -2,4,8,10-tetraoxaspiro [5.5] undecane , 3,9-bis [4- (1-piperidinylcarbonyl) phenyl] -2,4,8,10-tetraoxaspiro [5.5] undecane, and the like.

Among them, 3,9-bis [4- (N-cyclohexylcarbamoyl) phenyl] -2,4,8,10-tetraoxaspiro [5.5] undecane, 3,9-bis {4- [N-( 1-adamantyl) carbamoyl] phenyl} -2,4,8,10-tetraoxaspiro [5.5] undecane, 3,9-bis [4- (N-phenylcarbamoyl) phenyl] -2,4,8, 10-Tetraoxaspiro [5.5] undecane, 3,9-bis [4- (Nn-octadecylcarbamoyl) phenyl] -2,4,8,10-tetraoxaspiro [5.5] undecane, 3 , 9-Bis (4-carbamoylphenyl) -2,4,8,10-tetraoxaspiro [5.5] undecane is recommended because of its particular superiority in the effects of the present invention.

Further, among the above-mentioned amide compounds, the amide compound that forms β crystals with respect to the polypropylene resin contains a plurality of components whose molecular chains are oriented in different directions, which is a feature of the present invention. It is superior in forming a peculiar structure of a polyolefin-based resin molded product characterized by the above, and is particularly recommended.

The content of the amide compound is preferably 0.001 to 5 parts by weight, more preferably 0.005 to 1 part by weight, particularly based on 100 parts by weight of the total content of the polypropylene resin and the olefin elastomer. 0.01-0.7 parts by weight is recommended. In this range, the effect of the present invention is particularly superior.

When the polyolefin-based resin composition is used as a masterbatch by using the above-mentioned amide-based compound in a high content, it is useful even if it is used beyond the above-mentioned range. Even in that case, in order to obtain the molded article of the present invention, it is recommended to dilute the masterbatch so as to be within the range of the above-mentioned content of the amide compound.

Further, as the method of making a masterbatch as described above, a method of making a masterbatch of a mixture of a polypropylene resin and an olefin elastomer, a method of making a masterbatch of a polypropylene resin alone and then mixing with an olefin elastomer, and an olefin-based method. There is a method of making a masterbatch of the elastomer alone and then mixing it with a polypropylene resin, and any method may be used as long as it is within the range in which the effect of the present invention is exhibited.

The polyolefin-based resin molded product according to the present invention may further contain a conventionally known modifier for polyolefins within a range that exhibits the effects of the present invention, as appropriate according to the purpose of use and its use.

Examples of such modifiers for fatty acids include various additives described in "Handbook of Additives on the Positive List" (October 1990) edited by the Sanitary Council for Fatty Acids, etc., and more specifically, they are stable. Agents (metal compounds, epoxy compounds, nitrogen compounds, phosphorus compounds, sulfur compounds, etc.), ultraviolet absorbers (benzophenone compounds, benzotriazole compounds, etc.), antioxidants (phenolic compounds, phosphite ester compounds, sulfur) (Compounds, etc.), surfactants, lubricants (aliphatic hydrocarbons such as paraffin and wax, higher fatty acids with 8 to 22 carbon atoms, higher fatty acid metal (Al, Ca, Mg, Zn) salts with 8 to 22 carbon atoms, etc. Fatty acid with 8 to 18 carbon atoms, aliphatic alcohol with 8 to 22 carbon atoms, polyglycol, ester of higher fatty acid with 4 to 22 carbon atoms and aliphatic monovalent alcohol with 4 to 18 carbon atoms, 8 to 22 carbon atoms Higher fatty acid amide, silicone oil, rosin derivative, etc.), filler (talc, hydrotalcite, mica, zeolite, pearlite, diatomaceous soil, calcium carbonate, glass fiber, etc.), neutralizing agent, antioxidant, foaming agent, foaming Auxiliary agent, polymer additive, fluorescent whitening agent, plasticizer, molecular weight modifier (radical generator), cross-linking agent, cross-linking accelerator, antistatic agent, antifogging agent, polymer alloy component (block SBR or random SBR and them) Various modifications such as hydrides and other rubbers and polystyrenes), flame retardants, dispersants, organic / inorganic pigments, dyes, processing aids, antiblocking agents, organic crystal nucleating agents other than the above amide compounds, etc. Agents are exemplified. These modifiers can be used alone or in combination of two or more as appropriate.

Structure of Polyolefin Resin Molded Polyolefin The polyolefin resin molded product according to the present invention comprises a composition containing a hard segment polypropylene resin and a soft segment olefin elastomer as main components, and is a hard segment polypropylene resin. It is based on a structure that imparts flexibility and impact resistance without significantly impairing rigidity by having a sea-island structure in which an olefin-based elastomer, which is a soft segment, exists as a domain in a matrix composed of.

It is known that when a structure as described above is molded under molding conditions involving a flow field such as injection molding or extrusion molding, the olefin-based elastomer, which is a soft segment, becomes an ellipse having a large aspect ratio extended in the flow direction. Has been done. As a result, there is a difference between the structure in the flow direction (vertical direction) and the structure in the horizontal direction, so that anisotropy occurs.

Further, in the case of a general polypropylene-based resin, it is known that the molecular chains of the polypropylene-based resin also tend to be oriented in the flow direction, and as a result, the above anisotropy appears more prominently.

The polypropylene-based resin molded product of the present invention has the greatest feature in the above structure in that the orientation direction of the molecular chains of the polypropylene-based resin is changed to a direction perpendicular to the flow direction. That is, the greatest feature is that the anisotropy is alleviated by orienting the olefin-based elastomer stretched in the flow direction and the polypropylene-based resin in the direction perpendicular to the stretching direction.

The deformed state of the olefin-based elastomer can be easily confirmed by extracting the olefin-based elastomer from the molded product using a solvent and then observing the molded product with a scanning electron microscope. That is, in the above observation, the shape of the cavity shows the shape of the olefin-based elastomer that originally existed in the portion.

The orientation direction of the molecular chain of the polypropylene-based resin is calculated from the diffraction pattern obtained by wide-angle X-ray diffraction measurement, the two-color ratio of the absorption spectrum obtained by the polarization infrared absorption spectrum measurement, and the two-color ratio thereof. It can be easily confirmed from the value of the orientation function.

Specifically, using a general-purpose wide-angle X-ray diffractometer, the test piece cut out from the molded body is subjected to Through View (flow direction (MD direction) -direction perpendicular to the flow direction (TD direction) plane) and The direction in which the characteristic diffraction peaks of the polypropylene resin on the X-ray diffraction pattern obtained by the transmission method are concentrated by irradiating X-rays from the Edge View (MD direction-thickness direction (ND direction) plane) at room temperature. It is possible to confirm the direction in which the molecular chains of the polypropylene-based resin are oriented.

Further, the red dichroic ratio D (MD direction / TD direction) is calculated using (1 equation) from the value of the polarized infrared absorption spectrum measured using a general-purpose Fourier transform infrared spectroscope, and further, the red dicolor ratio D (MD direction / TD direction) is calculated. By calculating the orientation function F from the red two-color ratio D using (Equation 2), the orientation direction of the molecular chains of the polypropylene-based resin can be specified. That is, if the red dichroic ratio D is 1, it indicates that it is isotropic, and the larger it is, the more it is oriented in the MD direction, and conversely, the smaller it is, the more it is oriented in the TD direction. Is shown. Further, as is clear from (Equation 2), when the value of the orientation function F is a positive value, it is oriented in the MD direction, and when it is a negative value, it is oriented in the TD direction. Shown.

<Manufacturing method of polyolefin resin molded product>
The method for producing a polyolefin-based resin molded product of the present invention includes, for example, the following steps (i) to (iii), and the effects of the present invention can be more effectively achieved by satisfying such conditions. It is possible to obtain a molded product that can be used.
The description of the production method described later is also a description of the method for molding the polyolefin-based resin composition according to the present invention.

Step (i): An amide-based compound is dissolved in a polypropylene-based resin or a polyolefin-based resin containing a polypropylene-based resin and an olefin-based elastomer as main components at a temperature or higher at which the amide-based compound is completely dissolved in the melted resin. A step of obtaining a melted polyolefin resin composition.
Step (ii); A step of cooling the melted polyolefin resin composition to a temperature below the temperature at which crystals of the amide compound are precipitated.
Step (iii); After melting the cooled polyolefin resin composition in a temperature range equal to or higher than the melting point of the polypropylene resin and lower than the dissolution temperature of the amide compound in the polyolefin resin, the temperature is usually 125 ° C. or lower, preferably 20. A step of molding in a temperature range of ~ 125 ° C., more preferably 50 to 120 ° C., particularly preferably 80 to 120 ° C.

The olefin-based elastomer is generally melt-mixed in the step (i), but if it cannot be mixed in the step (i), even if it is melt-mixed in the step (iii), the effect of the present invention is particularly high. No problem.

In the step (i), it is important to dissolve the amide compound (preferably at least one amide compound represented by the general formula (1) or the general formula (2)) in the polyolefin resin. Yes, it can be done using a known device. The step (i) comprises an operation of dissolving the amide compound and an operation of putting the polyolefin resin composition into a molten state.

"The amide compound is dissolved by heating" means that substantially the entire amount of the amide compound is dissolved within the scope of the present specification and claims. In this operation, if the amide compound is not sufficiently dissolved, the effect of the present invention may not be sufficiently exhibited. When the amide-based compound is heated and dissolved, when the melted polyolefin-based resin composition is visually observed, the undissolved amide-based compound is substantially not observed, and the melted polyolefin-based resin composition is transparent. be. By this method, it can be confirmed that substantially the entire amount is dissolved.

The "melting point of the polyolefin resin" in the step (ii) means the temperature at which all the resins contained in the polyolefin resin composition are completely melted, and when measured by a differential scanning calorimeter (DSC), for example. This is the temperature corresponding to the melting peak temperature that appears on the hottest side of the chart.

The step (i) will be specifically described. For example, (1) a mixer such as a Henschel mixer, a ribbon blender, a drum mixer, or the like, (1) the polyolefin-based resin, the amide-based compound, and, if necessary, the modifier for polyolefin. After dry-blending with Then, the amide-based compound is dissolved in the polypropylene-based resin at a predetermined resin temperature, the molten state is maintained as it is, and the process proceeds to the next step (ii), and (2) the predetermined resin temperature using a melt-kneader. An amide-based compound and, if necessary, a polyolefin modifier, if necessary, are directly added to the melted polyolefin-based resin in the above in a solid form or a liquid form to dissolve the resin, and the melted state is maintained as it is, and the next step is performed. Method of shifting to (ii), (3) The polyolefin-based resin melted at a predetermined resin temperature using a melt-kneader contains an amide-based compound and, if necessary, a polyolefin modifier at a high concentration. Examples thereof include a method of adding and dissolving using a master batch, maintaining the molten state as it is, and shifting to the next step (ii).

Examples of the above (1) to (3) are methods in which the amide compound is dissolved, the melted state is maintained as it is, and the process proceeds to the next step (ii). It is also possible to adopt a procedure in which the amide compound is once cooled and pelletized, the amide compound is dissolved in the polyolefin resin again at a predetermined treatment temperature, the molten state is maintained as it is, and the process proceeds to the next step (ii). ..

Further, as a device for sufficiently dissolving the amide compound, in addition to raising the resin temperature in the step (i) while paying attention to the thermal decomposition temperature of the polyolefin resin, the treatment time (residence time) in the step (i) and heating It is preferable to appropriately adjust the screw rotation speed and shape of the mixing device.

Usually, the melting point of the amide compound according to the present invention is higher than the melting temperature of the polyolefin resin, and the melting temperature range of the polyolefin resin is 80 to 180 ° C. Therefore, in the above step (i), first, the polyolefin The based resin is melted, and then the amide compound (solid) is dissolved in the melted polyolefin resin. That is, the melting temperature is higher than the melting point of the polyolefin resin. Therefore, the resin temperature in step (i) is equal to or higher than the dissolution temperature of the amide compound in the polyolefin resin, preferably in the range of the dissolution temperature to (dissolution temperature + 40 ° C.), and more preferably (the dissolution temperature + 5 ° C.). ) ~ (Melting temperature + 40 ° C) is recommended.

In the above step (ii), the melted polyolefin resin composition is cooled to a temperature below the temperature at which crystals of the amide compound are precipitated. That is, the resin temperature at the time of cooling in the step (ii) is not more than the temperature at which the amide compound is precipitated from the polyolefin resin composition, preferably (the precipitation temperature −150 ° C.) or less, and more preferably (the precipitation temperature). -200 ° C) or less is recommended. More specifically, it is preferably 80 ° C. or lower, more preferably 40 ° C. or lower.

Further, the cooling method in the step (ii) is not particularly limited, and a known cooling method can be adopted. Specifically, a method of immersing in a refrigerant such as water or air-cooling using a forced air-cooling device can be used. At this time, it is best that the amide compound is recrystallized in the polyolefin resin and precipitated as needle-like crystals. Needle-shaped crystals of such an amide compound can be easily observed with a polarizing microscope.

In order to exert the effect of the present invention more effectively, it is important that the crystals of the amide compound (particularly needle-like crystals) are uniformly and finely dispersed in the polyolefin resin. Therefore, the steps (i) and (ii) are the simplest and most efficient methods for achieving the above state.

However, if the amide compound is easily available as microcrystals or acicular crystals, the step (iii) can be performed immediately, but the amide compound obtained as a pretreatment before the step (iii) is once obtained. It is preferable to disperse it uniformly in the polyolefin resin.

The temperature control in the step (iii) is usually 125 ° C. or lower, preferably 125 ° C. or lower, after the polyolefin-based resin composition is once melted in a temperature range equal to or higher than the melting point of the polypropylene-based resin and lower than the dissolution temperature of the amide-based compound in the polyolefin-based resin. Is molded in a temperature range of 20 to 125 ° C., more preferably 50 to 120 ° C., particularly preferably 80 to 120 ° C.

The above-mentioned "molding" is appropriately pressure-molded on the condition that the temperature can be controlled so as to have a desired shape and shape (film, sheet, bottle, case, etc.) of the polyolefin-based resin molded body. It means that molding is performed by adopting a molding method such as vacuum molding, compression molding, extrusion thermoform molding, extrusion molding, or injection molding.

<Method of improving mechanical anisotropy>
The method for improving mechanical anisotropy according to the present invention is to change the orientation direction of the molecular chains of the polypropylene-based resin from the direction parallel to the stretching direction of the olefin-based elastomer, that is, the direction in which the resin flows, to the direction perpendicular to the direction. Has the greatest features. Specifically, the orientation direction of the chain can be changed to a vertical direction by blending the above amide compound and molding under the above conditions.

Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples. The evaluation methods in Examples and Comparative Examples are as follows.

[Confirmation of shape of olefin elastomer in molded product]
Sample Preparation A sheet was prepared by extrusion molding under the following conditions using a uniaxial fully meshing twin-screw extruder ULT15TWnano-15MG-NH (-700) -HKU manufactured by Technobel Co., Ltd. A test piece having a predetermined size was cut out from the obtained sheet and immersed in xylene at room temperature for 4 days to extract an olefin elastomer, and then xylene was removed. Then, it was cut to a thickness of 10 μm under liquid nitrogen cooling using a microtome to prepare a sample.
<Extrusion conditions>
Set temperature barrel C1 117 ℃, C2 200 ℃,
Head 200 ° C,
Dice 200 ℃
Screw shape D = 15mm, L / D = 15 (biaxial)
Screw rotation speed 20 rpm
Die shape Slit die (opening length) 35 mm,
Die gap 0.5mm
Discharge rate 0.42 kg / h (using a weight feeder)
Air gap 50mm
Chill roll diameter 72mm
Chill roll rotation speed 1 rpm
Chill roll temperature 100 ℃

Observation with a scanning electron microscope (SEM) Palladium / platinum alloy vapor deposition was performed on the above sample with an ion vapor deposition apparatus (E1010 manufactured by Hitachi, Ltd.) for 80 seconds to impart conductivity, and a scanning electron microscope (S4100 manufactured by Hitachi, Ltd.) was used. The observation was performed at an acceleration voltage of 20 kV.

[Confirmation of orientation of polypropylene resin in molded product]
Preparation of sample A test piece of a predetermined size was cut out from an extruded sheet obtained under the same conditions as the above [Confirmation of shape of olefin elastomer in molded product] and used as a sample.

Wide-angle X-ray diffraction (2D-XRD)
In order to evaluate the crystal orientation, X-ray diffraction was measured by a transmission method using a wide-angle X-ray diffractometer (SmartLab, manufactured by Rigaku Co., Ltd.). The tube current and tube voltage were set to 30 mA and 40 kV, respectively. Each sample was cut out so as to have a length x width of about 10 mm × 10 mm, and was laminated and bonded to a thickness of about 1.0 mm using a solution of toluene and polystyrene. X-rays were emitted from two directions, the MD-TD surface (throwh view: hereinafter referred to as "TV") and the MD-ND surface (edge view: hereinafter referred to as "EV").

Infrared dichroic ratio and orientation function In order to evaluate crystal orientation, a polarized infrared absorption spectrum was measured using a Fourier transform infrared spectroscope (Spectrum100, manufactured by PerkinElmer). From the obtained absorption spectrum, the red dichroic ratio D was calculated using (1 equation), and the orientation function F (2 equations) was further calculated using (2 equations). Focusing on the absorption band of the spectrum of 998 cm ^-1 , the value of c in (Equation 2) was set to 1.

[Confirmation of anisotropy of molded product]
Preparation of sample A test piece having a size of 20 mm × 5 mm was cut out from an extruded sheet obtained under the same conditions as the above [Confirmation of shape of olefin elastomer in molded product] and used as a sample.

Dynamic Viscoelasticity Using the above sample, a dynamic viscoelasticity measuring device (Rheogel-E4000-DVE manufactured by UBM) is used to measure the distance between chucks 10 mm, frequency 10 Hz, temperature range -100 ° C to 165 ° C, and heating rate 2 ° C. Measured at / min. Further, each measurement was performed using a sample cut out from each extruded sheet along the resin flow direction (MD direction) and the direction perpendicular to the flow direction (TD direction).

<Example 1>
Polypropylene resin (polypropylene homopolymer, MFR = 7.5 g / 10 minutes, melting point; 168 ° C.) 70 parts by weight, ethylene-1-butene copolymer elastomer (MFR = 2.2 g / 10 minutes, density; 0.862 g / cm ³ ) 30 parts by weight, N, N'-dicyclohexyl-2,6-naphthalenedicarboxyamide (manufactured by Shin Nihon Rika Co., Ltd., trade name; NJester NU-100) 0.07 parts by weight as an amide compound, polyolefin Tetrakiss [methylene-3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate] methane (manufactured by BASF, trade name "IRGANOX1010") 0.15 parts by weight, Tris (2) , 4-Di-t-butylphenyl) phosphite (manufactured by BASF, trade name "IRGAFOS168") 0.1 weight, and calcium stearate (manufactured by Nitto Kasei Kogyo Co., Ltd., trade name "CP-S") 0.05 The weight was dry blended with a henschel mixer. The dry blend was melted with N, N'-dicyclohexyl-2,6-naphthalenedicarboxyamide at a resin temperature of 260 ° C. to obtain a melted polyolefin resin composition (step (i)). The melted polyolefin resin composition was water-aged and cut with a pelletizer to obtain a pellet-shaped polyolefin resin composition (step (ii)). The pellet was sheet-molded at a resin temperature of 200 ° C. and a chill roll temperature of 80 ° C. to prepare a polyolefin-based resin sheet of the present invention having a thickness of 0.3 mm (step (iii)).
A 10 mm × 10 mm test piece was cut out from the obtained sheet, and SEM observation was performed after a predetermined treatment. FIG. 1 shows a photograph of the observed image.
Subsequently, a 10 mm × 10 mm test piece was cut out from the above sheet, and X-ray diffraction measurement was performed after a predetermined treatment. FIG. 3 shows 2D-XRD diffraction patterns in EV (left) and TV (right).
Next, the polarized infrared absorption spectrum was measured using the above sheet, and the red dichroic ratio and the orientation function were obtained using (Equation 1) and (Equation 2), which are shown in Table 1.
Finally, a 20 mm × 5 mm test piece was cut out from the above sheet, a dynamic viscoelasticity test was performed, and the temperature dependence of the dynamic viscoelasticity was plotted on a graph, and the result is shown in FIG.

<Example 2>
The sheet was carried out in the same manner as in Example 1 except that an ethylene-propylene copolymer elastomer (manufactured by JSR Corporation, product name "EP11") was used instead of the ethylene-1-butene copolymer elastomer as the olefin-based elastomer. Was produced.
A test piece of a predetermined size is cut out from the obtained sheet, further processed as necessary, and then the test piece is used as a sample to measure the polarized infrared absorption spectrum, and the obtained two red colors are obtained. The ratio and orientation function are shown in Table 1.
A 10 mm × 10 mm test piece was cut out from the obtained sheet, and SEM observation was performed after a predetermined treatment. FIG. 2 shows a photograph of the observed image.
Subsequently, a 20 mm × 5 mm test piece was cut out from the above sheet, a dynamic viscoelasticity test was performed, and the temperature dependence of the dynamic viscoelasticity was plotted on a graph, and the result is shown in FIG.

<Comparative example 1>
A polyolefin-based resin sheet was prepared by carrying out the same procedure as in Example 1 except that the amide-based compound was not blended.
A 10 mm × 10 mm test piece was cut out from the obtained sheet, and X-ray diffraction measurement was performed after a predetermined treatment. FIG. 4 shows 2D-XRD diffraction patterns in EV (left) and TV (right).
Next, the polarized infrared absorption spectrum was measured using the above sheet, and the red dichroic ratio and the orientation function were obtained using (Equation 1) and (Equation 2), which are shown in Table 1.
Subsequently, a 20 mm × 5 mm test piece was cut out from the above sheet, a dynamic viscoelasticity test was performed, and the temperature dependence of the dynamic viscoelasticity was plotted on a graph, and the result is shown in FIG.

From the photographs of FIGS. 1 and 2, it is clearly observed that the hollow portion shown in black is very elongated in the resin flow direction (MD direction). Therefore, it can be seen that the olefin-based elastomer in the molded product is remarkably stretched in the flow direction.

From the X-ray diffraction pattern of FIG. 4 (Comparative Example 1), the polypropylene resin not containing the amide compound has a weak (040) plane derived from the α crystal of the polypropylene resin in the TV (Direct View) image. From the fact that the diffraction peak is confirmed in the equatorial direction (φ = 90 °), it can be seen that the molecular chains of the polypropylene resin are oriented in the flow direction.

On the other hand, from the X-ray diffraction pattern of FIG. 3 (Example 1), by blending the amide compound, the diffraction peaks of the (110) plane derived from the β crystal of the polypropylene resin are φ = 30 ° and φ = 90. It appears strongly in °, and it is clear that the molecular chains of the polypropylene resin are oriented in the direction perpendicular to the flow direction. Since the crystal morphology of the diffraction surface of the polypropylene resin changes from α crystal to β crystal due to the action of the amide compound as a β crystal nucleating agent, the (040) surface of the α crystal is shown in FIG. In FIG. 2, the orientation was confirmed by focusing on the diffraction peak on the (110) plane of the β crystal.

FIGS. 5 to 7 show the storage elastic modulus (E', elastic element) and the loss elastic modulus (E', viscous, which are the measurement results of the temperature dependence of the dynamic viscoelasticity in Examples 1 and 2 and Comparative Example 1. Elements) are plotted in the temperature range in which the polyolefin resin molded product according to the present invention is usually used, that is, in the range of -30 to 40 ° C. The numerical values of dynamic viscoelasticity are mechanical properties. In the case of the present invention as well, the presence or absence of mechanical anisotropy was determined by comparing the elastic moduli of the flow direction (MD, Machine Direction) and the direction perpendicular to the flow direction (TD, Transverse Direction). The elastic modulus curves of Examples 1 and 2 containing the amide compound shown in FIGS. 5 and 6 clearly show the MD direction and TD as compared with the system not containing the amide compound shown in FIG. 7. It can be seen that the difference in elastic modulus in the direction is small. From this result, it is clear that the anisotropy of the polyolefin-based resin molded product according to the present invention is greatly improved by blending the amide-based compound.

The polyolefin-based resin molded product of the present invention has low anisotropy, well-balanced excellent rigidity and impact resistance, and is a molded product such as an automobile part, a mechanical engineering part, a chemical industry part, and a home appliance part. Can be used as.

Claims (9)

Polypropylene-based resin molded product having a sea-island structure in which a polypropylene-based resin (polypropylene homopolymer and a polypropylene copolymer having a propylene unit of 80% by weight or more and less than 100% by weight in the copolymer) is used as a matrix and an olefin-based elastomer is used as a domain. And
Polyolefin-based resin molded body characterized by being oriented in a direction perpendicular to the flow direction of the resin at the time of more than 50% of the total molecular chain of the polypropylene resin is molded. The polyolefin-based resin according to claim 1, wherein the two-color ratio of the absorption spectrum obtained by the polarization infrared absorption spectrum measurement is less than 1.00, and the orientation function calculated from the two-color ratio is a negative value. Molded body. Component (A): Polypropylene resin (polypropylene homopolymer and polypropylene copolymer having propylene unit of 80% by weight or more and less than 100% by weight in the copolymer) ,
Component (B): Olefin-based elastomer, and component (C): At least one selected from the group consisting of the amide-based compound represented by the following general formula (1) and the amide-based compound represented by the general formula (2). comprising an amide-based compound, the polypropylene resin as a matrix, a polyolefin resin molded article having a sea-island structure that the olefin-based elastomer as the domain,
The content of the component (C) is 0.001 to 5 parts by weight with respect to the total content of the component (A) and the component (B) of 100 parts by weight, and the component (A) and the component (B) are (B). A polyolefin-based resin molded product in which the ratio of the components is in the range of (A) component / (B) component = 50/50 to 90/10 .
General formula (1)

[In the formula, n represents an integer of 2 to 6. R ¹ is a saturated or unsaturated aliphatic polycarboxylic acid residue having 2 to 18 carbon atoms, an alicyclic polycarboxylic acid residue having 3 to 18 carbon atoms, or an aromatic polycarboxylic acid residue having 6 to 18 carbon atoms. Represents a group. 2-6 ^{R 2} are the same or different, respectively, saturated or unsaturated aliphatic amine residue having 5 to 30 carbon atoms, 6 to alicyclic amine residue or carbon atoms of 5 to 30 carbon atoms Represents 30 aromatic amine residues. ]
General formula (2)

[In the formula, R ³ , R ⁴ , R ⁵ and R ⁶ may have the same or different hydrogen atom, an alkyl group having 1 to 20 carbon atoms, and a substituent having 5 to 20 carbon atoms, respectively. Represents a cycloalkyl group or an aryl group which may have a substituent having 6 to 20 carbon atoms. However, R ³ and R ⁴ and R ⁵ and R ⁶ do not represent hydrogen atoms at the same time, respectively. Further, R ³ and R ⁴ or R ⁵ and R ⁶ may be bonded to each other to form an alkylene group. ] In the component (C), n in the general formula (1) is an integer of 2 to 3, R ¹ is an aromatic polycarboxylic acid residue having 6 to 12 carbon atoms, and 2 to 3 R ² are the same or different. The polyolefin-based resin molded product according to claim 3, which is an amide-based compound represented by a saturated alicyclic amine residue having 6 to 10 carbon atoms, respectively. The polyolefin-based resin molded product according to claim 3 or 4, wherein the component (B) is a copolymer elastomer of ethylene and an α-olefin having 3 to 8 carbon atoms. (I) Polypropylene-based resin (polypropylene homopolymer and polypropylene copolymer having propylene units of 80% by weight or more and less than 100% by weight in the copolymer) or a polyolefin-based resin containing the polypropylene-based resin and an olefin-based elastomer as main components. At least one amide-based compound selected from the group consisting of the amide-based compound represented by the following general formula (1) and the amide-based compound represented by the general formula (2) is added to and heated to heat the amide-based compound. dissolved in molten said polypropylene resin or a polyolefin resin to obtain a polyolefin resin composition in a molten state,
(Ii) A step of cooling the melted polyolefin-based resin composition obtained in the step (i) to precipitate crystals of an amide-based compound, and (iii) a step of cooling the polyolefin-based resin in the step (ii). the resin composition above the melting point of said polypropylene resin, obtained by comprising the step of molding after amide compound melted within a range of temperature not heated and dissolved, producing a polyolefin resin molded article of low mechanical anisotropy Method.
General formula (1)

[In the formula, n represents an integer of 2 to 6. R ¹ is a saturated or unsaturated aliphatic polycarboxylic acid residue having 2 to 18 carbon atoms, an alicyclic polycarboxylic acid residue having 3 to 18 carbon atoms, or an aromatic polycarboxylic acid residue having 6 to 18 carbon atoms. Represents a group. 2-6 ^{R 2} are the same or different, respectively, saturated or unsaturated aliphatic amine residue having 5 to 30 carbon atoms, 6 to alicyclic amine residue or carbon atoms of 5 to 30 carbon atoms Represents 30 aromatic amine residues. ]
General formula (2)

[In the formula, R ³ , R ⁴ , R ⁵ and R ⁶ may have the same or different hydrogen atom, an alkyl group having 1 to 20 carbon atoms, and a substituent having 5 to 20 carbon atoms, respectively. Represents a cycloalkyl group or an aryl group which may have a substituent having 6 to 20 carbon atoms. However, R ³ and R ⁴ and R ⁵ and R ⁶ do not represent hydrogen atoms at the same time, respectively. Further, R ³ and R ⁴ or R ⁵ and R ⁶ may be bonded to each other to form an alkylene group. ] The production method according to claim 6 , wherein the crystals of the amide compound precipitated in the step (ii) are fine needle-like crystals. Polypropylene-based resin (polypropylene homopolymer and polypropylene copolymer having propylene unit of 80% by weight or more and less than 100% by weight in the copolymer) and polyolefin-based resin containing olefin-based elastomer as main components are prepared by the following general formula (1). characterized by molding by blending the amide compound and the general formula (2) at least one amide-based compound selected from the group consisting of amide compounds represented by the represented, the polypropylene resin as a matrix , A method for improving the mechanical anisotropy of a polyolefin-based resin molded product having a sea-island structure having an olefin-based elastomer as a domain.
General formula (1)

[In the formula, n represents an integer of 2 to 6. R ¹ is a saturated or unsaturated aliphatic polycarboxylic acid residue having 2 to 18 carbon atoms, an alicyclic polycarboxylic acid residue having 3 to 18 carbon atoms, or an aromatic polycarboxylic acid residue having 6 to 18 carbon atoms. Represents a group. 2-6 ^{R 2} are the same or different, respectively, saturated or unsaturated aliphatic amine residue having 5 to 30 carbon atoms, 6 to alicyclic amine residue or carbon atoms of 5 to 30 carbon atoms Represents 30 aromatic amine residues. ]
General formula (2)

[In the formula, R ³ , R ⁴ , R ⁵ and R ⁶ may have the same or different hydrogen atom, an alkyl group having 1 to 20 carbon atoms, and a substituent having 5 to 20 carbon atoms, respectively. Represents a cycloalkyl group or an aryl group which may have a substituent having 6 to 20 carbon atoms. Note that R ³ and R ⁴ and R ⁵ and R ⁶ do not represent hydrogen atoms at the same time, respectively. Further, R ³ and R ⁴ or R ⁵ and R ⁶ may be bonded to each other to form an alkylene group. ] Component (A): Polypropylene resin (polypropylene homopolymer and polypropylene copolymer having propylene unit of 80% by weight or more and less than 100% by weight in the copolymer) ,
Component (B): Olefin-based elastomer, and component (C): At least one selected from the group consisting of the amide-based compound represented by the following general formula (1) and the amide-based compound represented by the general formula (2). A polyolefin-based resin composition used for obtaining a polyolefin-based resin molded product having low mechanical anisotropy, which comprises an amide-based compound .
The content of the component (C) is 0.001 to 5 parts by weight with respect to the total content of the component (A) and the component (B) of 100 parts by weight, and the component (A) and the component (B) are (B). A polyolefin-based resin composition in which the ratio of the components is in the range of (A) component / (B) component = 50/50 to 90/10 .
General formula (1)

[In the formula, n represents an integer of 2 to 6. R ¹ is a saturated or unsaturated aliphatic polycarboxylic acid residue having 2 to 18 carbon atoms, an alicyclic polycarboxylic acid residue having 3 to 18 carbon atoms, or an aromatic polycarboxylic acid residue having 6 to 18 carbon atoms. Represents a group. 2-6 ^{R 2} are the same or different, respectively, saturated or unsaturated aliphatic amine residue having 5 to 30 carbon atoms, 6 to alicyclic amine residue or carbon atoms of 5 to 30 carbon atoms Represents 30 aromatic amine residues. ]
General formula (2)

[In the formula, R ³ , R ⁴ , R ⁵ and R ⁶ may have the same or different hydrogen atom, an alkyl group having 1 to 20 carbon atoms, and a substituent having 5 to 20 carbon atoms, respectively. Represents a cycloalkyl group or an aryl group which may have a substituent having 6 to 20 carbon atoms. However, R ³ and R ⁴ and R ⁵ and R ⁶ do not represent hydrogen atoms at the same time, respectively. Further, R ³ and R ⁴ or R ⁵ and R ⁶ may be bonded to each other to form an alkylene group. ]

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