JP2017075209A - Polypropylene resin composition, spin-dyeing material using the same as raw material, and molded body using the same as raw material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a polypropylene resin composition good in moldability and excellent in rigidity (flexure elastic modulus), impact resistance and transparency, a spin-dyeing material using the same as a raw material and a molded body using the same as a raw material.SOLUTION: A polypropylene resin composition contains a component A satisfying conditions a1 to a3 of 55 to 85 wt.% and a component B satisfying a condition b of 15 to 45 wt.%, where total A and B is 100 wt.%. a1: the component A contains a propylene homopolymer (A1) of 40 to 90 wt.% and a propylene-α-olefin random copolymer (A2) of 10 to 60 wt.%, where total of (A1) and (A2) is 100 wt.%. a2: MFR (230°C, 2.16 kg load) of whole of the component A is 0.5 to 200 g/10 min. a3: the component A has melting peak temperature (Tm) in a range of 110 to 170°C (DSC method). b: the component B is at least one kind of elastomer.SELECTED DRAWING: None

Description

  The present invention relates to a polypropylene resin composition, a raw material made from the same, and a molded body made from the same, and more specifically, in addition to moldability, rigidity (flexural modulus), impact properties (impact strength) The present invention also relates to a polypropylene resin composition having excellent transparency, a raw material made from the same, and a molded body made from the same.

  Polypropylene-based resin compositions are used as resin materials with excellent physical properties, moldability, recyclability and economy, and their fields of use have expanded. Among them, automotive parts such as door trims, instrument panels and pillars, televisions, vacuum cleaners, etc. In the field of electrical equipment parts, polypropylene resin compositions such as propylene resin and composite polypropylene resin in which an elastomer (rubber) is reinforced with propylene resin are used for moldability, physical property balance, recyclability, economy, etc. Therefore, it is widely used in various fields including the molded body. And when it is actually used as a product, although a molded body of the composition colored in part with a pigment or the like is used, most of the molded body of the composition is uncolored or colored. The current situation is that it is used after painting. However, in these fields, non-coating of molded products is promoted (ie, molded products of polypropylene-based colored resin compositions are used as they are due to automation and high efficiency of production processes (cost reduction) and solvent regulations). )

In unpainted molded products, high performance, large size, thinning, diversification / complexity of shapes, physical properties, etc. are required at a high level, and at the same time, the appearance of the molded product is improved, that is, the color development is improved. It has been demanded. Here, the color developability refers to a characteristic that the original color of a pigment used for coloring can be expressed better and can be visually confirmed when formed into a molded body. In order to increase this, for example, in the colored resin composition and the molded product, it is necessary that the transparency of the propylene-based resin itself of the matrix is better (high transparency). This is because if the transparency is poor, the propylene-based resin itself inhibits the original color tone of the coloring component (pigment, etc.). Moreover, that the transparency of the propylene-based resin is poor means that the coloring component that can be visually confirmed is only a portion close to the surface of the molded body. For this reason, the thickness of the colored component that can be visually confirmed is insufficient, and there is a risk that the original color tone of the colored component may be insufficient.

So far, in polypropylene-based colored resin compositions including metallic colors containing glitter materials such as aluminum flake pigments and metal powders, and molded articles thereof, mechanical properties such as rigidity and impact resistance and coloring properties are exhibited. Various methods have been proposed for improving and improving balance (see, for example, Patent Documents 1 and 2).
Patent Document 1 discloses a resin composition that satisfies the balance between high rigidity and impact resistance, color developability when a pigment is added, and weld by combining a specific hydrogenated styrene block polymer with a polypropylene polymer. It is disclosed. However, it is known that a hydrogenated styrene-based block polymer has a hydrogenation process in its production process, so that the production process is complicated, which may cause a problem in economy. That is, in the technique of Patent Document 1, since a specific hydrogenated styrene block polymer is used in a large amount, it must be said that it is unlikely to be adopted from an economical point of view on a practical scale on an industrial scale. Therefore, even if other elastomers that can be manufactured with a simpler manufacturing process are used with the reduced amount of hydrogenated styrenic block polymer as much as possible, various mechanical properties and color developability can be kept in good balance. There was a need to develop technology that could
Patent Document 2 discloses a resin composition obtained by combining a specific propylene polymer with a fibrous inorganic filler, a thermoplastic elastomer, and a colorant. This technology balances rigidity, impact strength, and weld line at a good level, but an inorganic filler is added to improve mechanical properties, and further improvement in color development (transparency) is expected. It was rare.

JP 2011-116828 A JP 2009-35713 A

  An object of the present invention is to provide a polypropylene resin composition having good moldability and excellent rigidity (bending elastic modulus), impact properties (impact strength) and transparency, in view of the above-mentioned problems of the prior art. An object of the present invention is to provide a raw material used as a raw material and a molded body using the raw material.

  As a result of intensive studies to solve the above problems, the inventors of the present invention have, as a specific propylene polymer, at least one elastomer selected from the group consisting of an ethylene-α-olefin elastomer and a styrene-based elastomer, Found that a polypropylene resin composition blended at a specific ratio, a raw material made from it and a molded body made from the same can solve the above problems, and based on these findings, completed the present invention It came to do.

That is, according to the first aspect of the present invention, the component (A) that satisfies the following conditions (Ai) to (A-iii) on the basis of the total of 100% by weight of the components (A) and (B): A polypropylene resin composition comprising 55 to 85% by weight and 15 to 45% by weight of component (B) satisfying the following condition (Bi) is provided.
Condition (Ai): Component (A) is a propylene homopolymer (A1) that satisfies the following conditions (A1-i) to (A1-iii): 40 to 90% by weight; i) to (A2-iv) satisfying 10 to 60% by weight of a propylene-α-olefin random copolymer (A2) (provided that the propylene homopolymer (A1) and the propylene-α-olefin random copolymer) The total with the polymer (A2) is 100% by weight).
Condition (A1-i): The melt flow rate (230 ° C., 2.16 kg load) of the propylene homopolymer (A1) is 0.5 to 100 g / 10 min.
Condition (A1-ii): In the measurement by the DSC method, the propylene homopolymer (A1) exhibits a peak of melting peak temperature (Tm) in the range of 150 to 175 ° C.
Condition (A1-iii): The tensile strength of propylene homopolymer (A1) measured by JIS K7161 is 25-50 MPa.
Condition (A2-i): The melt flow rate (230 ° C., 2.16 kg load) of the propylene-α-olefin random copolymer (A2) is 0.5 to 100 g / 10 min.
Condition (A2-ii): In the measurement by the DSC method, the propylene-α-olefin random copolymer (A2) exhibits a peak of melting peak temperature (Tm) in the range of 110 to 150 ° C.
Condition (A2-iii): The tensile strength of the propylene-α-olefin random copolymer (A2) measured by JIS K7161 is 15 to 35 MPa.
Condition (A2-iv): The α-olefin of the propylene-α-olefin random copolymer (A2) is an α-olefin having 2 to 8 carbon atoms (excluding 3 carbon atoms), and The α-olefin content is 0.1 to 5% by weight (provided that the total content of propylene and α-olefin in the propylene-α-olefin random copolymer (A2) is 100% by weight. ).
Condition (A-ii): The entire component (A) has a melt flow rate (230 ° C., 2.16 kg load) of 0.5 to 200 g / 10 minutes.
Condition (A-iii): In the measurement by the DSC method, the component (A) shows a peak of melting peak temperature (Tm) in the range of 110 to 170 ° C.
Condition (Bi): Component (B) includes component (B1) satisfying the following conditions (B1-i) to (B1-iii) and the following conditions (B2-i) to (B2-iii): At least one elastomer selected from the group consisting of the component (B2) satisfying
Condition (B1-i): Component (B1) is an ethylene-α-olefin elastomer, and the α-olefin is an α-olefin having 4 to 8 carbon atoms.
Condition (B1-ii): The density of the component (B1) is 0.86 to 0.92 g / cm ³ .
Condition (B1-iii): The melt flow rate (230 ° C., 2.16 kg load) of the component (B1) is 0.5 to 100 g / 10 minutes.
Condition (B2-i): Component (B2) is a styrene elastomer.
Condition (B2-ii): The density of the component (B2) is 0.88 to 0.94 g / cm ³ .
Condition (B2-iii): The melt flow rate (230 ° C., 2.16 kg load) of the component (B2) is 1 to 30 g / 10 minutes.

In addition, according to the second invention of the present invention, in the first invention, there is provided a polypropylene resin composition in which the polypropylene resin composition further satisfies the following condition (a).
Condition (a): Among the propylene homopolymers constituting the propylene homopolymer (A1), the density d (A1 ′) of the propylene homopolymer (A1 ′) having the highest density and the component (B) are constituted. Among the elastomers, the density d (B ′) of the lowest density component (B ′) satisfies the relationship of the following formula (1).
1.0 ≧ d (B ′) / d (A1 ′) ≧ 0.963 Formula (1)

  According to the third invention of the present invention, there is provided a polypropylene resin composition in which the component (B) contains an ethylene-octene elastomer as the component (B1) in the first and second inventions. .

According to a fourth aspect of the present invention, in the first to third aspects of the invention, the component (B) includes both the component (B1) and the component (B2), and A polypropylene resin composition that satisfies the following condition (B-ii) is provided.
Condition (B-ii)
The component (B) contains 60 to 95% by weight of the component (B1) and 5 to 40% by weight of the component (B2) (provided that the total of the component (B1) and the component (B2) is 100% by weight. To do).

  According to the fifth aspect of the present invention, in the first to fourth aspects, the propylene-α-olefin random copolymer (A2) is a metallocene random copolymer. A polypropylene resin composition is provided.

  According to a sixth aspect of the present invention, there is provided a raw material made from a polypropylene resin composition according to any one of the first to fifth aspects and a pigment as raw materials.

  Further, according to the seventh invention of the present invention, a molded product in which the polypropylene resin composition according to any one of the first to fifth inventions or the raw material according to the sixth invention is a raw material. Will be provided

In addition to moldability, the polypropylene resin composition of the present invention, the raw material made from it and the molded body made from it are excellent in rigidity (flexural modulus), impact (impact strength) and transparency. ing. In particular, the fact that it is excellent in transparency means that it exhibits a good color development property when it is used as an original material containing a pigment.
Therefore, automotive interior and exterior parts such as door trims, instrument panels, pillars, glove boxes, console boxes, armrests, grip knobs, various trims, ceiling parts, housings, mudguards, bumpers, fenders, back doors, fan shrouds, etc. In addition, automotive parts such as engine room parts, electric equipment parts such as televisions and vacuum cleaners, various industrial parts, housing equipment parts such as toilet seats, building material parts, etc. Can be preferably used in the application of putting in.

  In the present invention, the specific component (A) is 55 to 85% by weight, an ethylene-α-olefin elastomer (hereinafter also simply referred to as component (B1)) and a styrene-based elastomer (hereinafter simply referred to as component (B2)). And a polypropylene resin composition containing 15 to 45% by weight of at least one elastomer (B) (hereinafter also simply referred to as component (B)) selected from the group consisting of The present invention relates to a raw material and a molded body using the raw material.

  Hereinafter, the polypropylene resin composition of the present invention, the production method thereof, the raw material made from the raw material, and the molded body made from the raw material will be described in detail for each item.

[I] Components of a polypropylene resin composition Ingredient (A)
The component (A) used in the present invention satisfies the following conditions (Ai) to (A-iii).
Condition (Ai): Component (A) is a propylene homopolymer (A1) that satisfies the following conditions (A1-i) to (A1-iii): 40 to 90% by weight; i) to (A2-iv) satisfying 10 to 60% by weight of a propylene-α-olefin random copolymer (A2) (provided that the propylene homopolymer (A1) and the propylene-α-olefin random copolymer) The total with the polymer (A2) is 100% by weight).
Condition (A1-i): The melt flow rate (230 ° C., 2.16 kg load) of the propylene homopolymer (A1) is 0.5 to 100 g / 10 min.
Condition (A1-ii): In the measurement by the DSC method, the propylene homopolymer (A1) exhibits a peak of melting peak temperature (Tm) in the range of 150 to 175 ° C.
Condition (A1-iii): The tensile strength of propylene homopolymer (A1) measured by JIS K7161 is 25-50 MPa.
Condition (A2-i): The melt flow rate (230 ° C., 2.16 kg load) of the propylene-α-olefin random copolymer (A2) is 0.5 to 100 g / 10 min.
Condition (A2-ii): In the measurement by the DSC method, the propylene-α-olefin random copolymer (A2) exhibits a peak of melting peak temperature (Tm) in the range of 110 to 150 ° C.
Condition (A2-iii): The tensile strength of the propylene-α-olefin random copolymer (A2) measured by JIS K7161 is 15 to 35 MPa.
Condition (A2-iv): The α-olefin of the propylene-α-olefin random copolymer (A2) is an α-olefin having 2 to 8 carbon atoms (excluding 3 carbon atoms), and The α-olefin content is 0.1 to 5% by weight (provided that the total content of propylene and α-olefin in the propylene-α-olefin random copolymer (A2) is 100% by weight. ).
Condition (A-ii): The entire component (A) has a melt flow rate (230 ° C., 2.16 kg load) of 0.5 to 200 g / 10 minutes.
Condition (A-iii): In the measurement by the DSC method, the component (A) shows a peak of melting peak temperature (Tm) in the range of 110 to 170 ° C.

(1) About each requirement (1-1) Condition (A-i)
The component (A) used in the present invention is a propylene homopolymer (A1) that satisfies the following conditions (A1-i) to (A1-iii) (hereinafter sometimes simply referred to as component (A1)). Propylene-α-olefin random copolymer (A2) satisfying the following conditions (A2-i) to (A2-iv) of 40 to 90% by weight (hereinafter sometimes simply referred to as component (A2)). 10 to 60% by weight (provided that the total of the propylene homopolymer (A1) and the propylene-α-olefin random copolymer (A2) is 100% by weight). Component (A) is a propylene homopolymer (A1) 50 to 80% by weight based on a total of 100% by weight of component (A1) and component (A2), and propylene-α-olefin random copolymer (A2) 20 -50 wt% is preferable, and it is more preferable to contain propylene homopolymer (A1) 55-75 wt% and propylene-α-olefin random copolymer (A2) 25-45 wt%. By adopting such an embodiment, it becomes possible to achieve good impact strength and transparency while maintaining higher rigidity (flexural modulus), and the polypropylene resin composition of the present invention having a better physical property balance. Things can be obtained.

(1-2) Condition (A-ii): Melt flow rate (MFR)
The melt flow rate (hereinafter sometimes abbreviated as MFR) (230 ° C., 2.16 kg load) of the entire component (A) used in the present invention is in the range of 0.5 to 200 g / 10 minutes. Necessary, preferably in the range of 3 to 150 g / 10 min, more preferably 5 to 50 g / 10 min. By setting the MFR of the entire component (A) within such a range, the polypropylene resin composition of the present invention, the raw material made from the raw material, and the molded body made from the raw material have high rigidity (flexural modulus). ) While maintaining good moldability and excellent impact strength. That is, when the MFR is less than 0.5 g / 10 min, the moldability (fluidity) is lowered in the polypropylene resin composition of the present invention, the raw material made from the same, and the molded body made from the raw material. There is a case. On the other hand, if the MFR exceeds 200 g / 10 minutes, the impact strength may be reduced.
The MFR of the entire component (A) can be adjusted by appropriately selecting the MFR of the propylene homopolymer (A1) and the MFR of the propylene-α-olefin random copolymer (A2). In addition, the MFR of the propylene homopolymer (A1) and the MFR of the propylene-α-olefin random copolymer (A2) are different in the type of catalyst used in the production of each, the polymerization temperature and pressure, or As a general method, a chain transfer agent such as hydrogen can be added during polymerization and the amount added can be adjusted easily.
In the present specification, MFR is a value measured at a test temperature = 230 ° C. and a load = 2.16 kg in accordance with JIS K7210.

(1-3) Condition (A-iii): Melting peak temperature (Tm)
Component (A) used in the present invention has a peak of melting peak temperature (Tm) (hereinafter sometimes abbreviated as Tm) measured by a DSC (Differential Scanning Calorimetry) method at 110 ° C. to 175 ° C. It is necessary to show in the range, preferably 114 ° C. to 170 ° C., more preferably 118 ° C. to 168 ° C. When component (A) shows the peak of melting peak temperature (Tm) in this range, the polypropylene-based resin composition of the present invention, the raw material made from it, and the molded body made from it have rigidity. Both (flexural modulus) and impact strength can be in a favorable range. That is, when the melting peak temperature (Tm) is less than 110 ° C., the polypropylene resin composition of the present invention, the raw material made from the raw material, and the molded body made from the raw material have rigidity (flexural modulus). May decrease. On the other hand, when the melting peak temperature (Tm) exceeds 175 ° C., impact strength and the like may be reduced.
In the present specification, the melting peak temperature (Tm) is determined by the method described in the Examples section described later, but can be measured and determined using an equivalent apparatus.
The melting peak temperature (Tm) can be controlled, for example, by selecting the type of catalyst used when producing the component (A1) and the component (A2) or by using a propylene-α-olefin random copolymer ( A2) It is possible by appropriately adjusting the amount ratio of propylene and α-olefin supplied to the polymerization tank during production. In order to control the melting peak temperature (Tm) to, for example, 110 ° C. to 175 ° C., the α-olefin content is generally in the range of about 0.1 to 10% by weight, depending on the type of catalyst used. By adjusting in step (b), a polymer having a desired melting peak temperature (Tm) can be produced.

(1-4) Condition (A-iv): Tensile strength The tensile strength measured by JIS K7161 of the component (A) used in the present invention is usually in the range of 20 to 50 MPa, preferably 25 to 25 MPa. The range is 45 MPa. By setting the tensile strength within such a range, the polypropylene resin composition of the present invention, the raw material made from the raw material, and the molded body made from the raw material can have a good impact while maintaining high rigidity. It is easy to achieve strength. That is, if the tensile strength is less than 20 MPa, the rigidity may decrease, and if the tensile strength exceeds 45 MPa, the impact strength may decrease.

(1-5) Condition (A1-i): MFR
The propylene homopolymer (A1) used in the present invention is required to have a melt flow rate (MFR) (230 ° C., 2.16 kg load) of 0.5 to 100 g / 10 min, preferably 3 to It is necessary to be in the range of 80 g / 10 min, more preferably 5-50 g / 10 min. By setting the MFR of the component (A1) in such a range, in the polypropylene resin composition of the present invention, a raw material made from the raw material, and a molded body made from the raw material, moldability (fluidity) and It becomes easy to keep the impact strength within a good range. That is, if the MFR is less than 0.5 g / 10 min, the moldability (fluidity) may be lowered in the polypropylene composite composition of the present invention and the molded body thereof. On the other hand, if it exceeds 100 g / 10 minutes, the impact strength may decrease.
Further, the MFR of the component (A1) can be easily adjusted by changing the polymerization temperature and pressure, or, as a general method, by adding a chain transfer agent such as hydrogen during the polymerization. Is as described above.

(1-6) Condition (A1-ii): Melting peak temperature (Tm)
The propylene homopolymer (A1) used in the present invention is required to have a melting peak temperature (Tm) measured by a DSC (Differential Scanning Calorimetry) method in a range of 150 ° C. to 175 ° C., preferably It is in the range of 153 ° C to 170 ° C, more preferably 155 ° C to 168 ° C. By setting Tm in such a range, the polypropylene resin composition of the present invention, the raw material made from the same, and the molded body made from the raw material have good rigidity (flexural modulus) and impact strength. It becomes possible. That is, when the Tm is less than 150 ° C., the polypropylene resin composition of the present invention, the raw material made from the raw material and the molded body made from the raw material may have reduced rigidity (flexural modulus). . On the other hand, when Tm exceeds 175 ° C., impact strength and the like may be reduced.
In this specification, the melting peak temperature (Tm) is determined by the method described in the section of Examples described later.
In addition, the control of the melting peak temperature (Tm) of the component (A1) can be adjusted, for example, by selecting the type of catalyst used when the component (A1) is produced. As described above.

(1-7) Condition (A1-iii): Tensile Strength The propylene homopolymer (A1) used in the present invention needs to have a tensile strength measured by JIS K7161 of 25-50 MPa, preferably It is in the range of 30 to 45 MPa, more preferably 34 to 42 MPa. By setting the tensile strength in such a range, the polypropylene resin composition of the present invention, the raw material made from the raw material, and the molded body made from the raw material can have good impact while maintaining high rigidity. It is possible to achieve strength. That is, if the tensile strength is 25 MPa or less, the rigidity (flexural modulus) may be reduced, and if the tensile strength exceeds 50 MPa, the impact strength may be deteriorated.

(1-8) Condition (A2-i): MFR
The propylene-α-olefin random copolymer (A2) used in the present invention has a melt flow rate (230 ° C., 2.16 kg load) in the range of 0.5 to 100 g / 10 min, preferably 3 to 80 g. / 10 minutes, more preferably in the range of 5-50 g / 10 minutes. By setting the MFR in such a range, the moldability (fluidity) and impact strength are good in the polypropylene resin composition of the present invention, the raw material made from the raw material and the molded body made from the raw material. It is easy to keep in range. That is, when the MFR is less than 0.5 g / 10 min, the moldability (fluidity) is lowered in the polypropylene resin composition of the present invention, the raw material made from the same, and the molded body made from the raw material. There is a risk. On the other hand, if it exceeds 100 g / 10 minutes, the impact strength may decrease.

(1-9) Condition (A2-ii): Melting peak temperature (Tm)
The propylene-α-olefin random copolymer (A2) used in the present invention must have a melting peak temperature (Tm) measured by a DSC (Differential Scanning Calorimetry) method in a range of 110 ° C to 150 ° C. Preferably, it is in the range of 115 ° C to 145 ° C, more preferably 118 ° C to 140 ° C. By setting the Tm within such a range, the polypropylene resin composition of the present invention, the dressing material using the polypropylene resin composition, and the molded body using the material as a raw material have good rigidity (flexural modulus) and impact strength. It becomes possible. That is, when Tm is less than 110 ° C., the rigidity (flexural modulus) may be lowered in the polypropylene resin composition of the present invention, the raw material made from the same, and the raw material. On the other hand, when Tm exceeds 150 ° C., impact strength and the like may be reduced.
The melting peak temperature (Tm) can be controlled by appropriately adjusting the amount ratio of propylene and α-olefin supplied to the polymerization tank when the component (A2) is produced. In order to control the melting peak temperature (Tm) to, for example, 110 ° C. to 150 ° C., depending on the type of catalyst used, the α-olefin content is in the range of about 0.1 to 10 w%. By adjusting, the component (A2) having a desired melting peak temperature (Tm) can be produced.

(Vi) Condition (A2-iii): Tensile strength The propylene-α-olefin random copolymer (A2) used in the present invention needs to have a tensile strength measured by JIS K7161 of 15 to 35 MPa. The range is preferably 18 to 32 MPa, more preferably 20 to 30 MPa. When the tensile strength is within this range, the polypropylene resin composition of the present invention, the raw material made from the same, and the molded body made from the same can achieve good impact strength while maintaining high rigidity. It becomes possible to do. That is, if the tensile strength is 15 MPa or less, the rigidity (flexural modulus) may be reduced, and if the tensile strength exceeds 35 MPa, the impact strength may be deteriorated.

(Vii) Condition (A2-iv): Content of α-olefin The propylene-α-olefin random copolymer (A2) used in the present invention is propylene in the propylene-α-olefin random copolymer (A2). When the total α-olefin content is 100% by weight, the α-olefin content needs to be in the range of 0.1 to 5% by weight. The α-olefin is an α-olefin having 2 to 8 carbon atoms (excluding 3 carbon atoms).
The content of the α-olefin is preferably 0.2 to 4.5% by weight, more preferably 0.3 to 4% by weight, and particularly preferably 0.5 to 3.5% by weight. When the content of the α-olefin is in the above range, the polypropylene resin composition of the present invention, the raw material made from the raw material, and the molded body made from the raw material have rigidity (flexural modulus) and impact strength. It becomes possible to make it favorable.
In order to control the α-olefin content within a predetermined range, the amount ratio of propylene and α-olefin supplied to the polymerization tank may be appropriately adjusted during the production of the component (A2). The relationship between the supply ratio and the α-olefin content in the resulting propylene-α-olefin random copolymer is a technical matter well known to those skilled in the art. When a metallocene catalyst is used, it varies depending on the type, but the adjustment of the supply ratio Thus, the component (A2) having the required α-olefin content can be produced.

Examples of the α-olefin having 2 to 8 carbon atoms excluding 3 carbon atoms (propylene) used in the component (A2) include ethylene, 1-butene, 2-methyl-1-propene, 1-pentene, 2 -Methyl-1-butene, 3-methyl-1-butene, 1-hexene, 2-ethyl-1-butene, 2,3-dimethyl-1-butene, 2-methyl-1-pentene, 3-methyl-1 -Pentene, 4-methyl-1-pentene, 3,3-dimethyl-1-butene, 1-heptene, methyl-1-hexene, dimethyl-1-pentene, ethyl-1-pentene, trimethyl-1-butene, -Octene etc. can be mentioned.
Moreover, the comonomer which is a C2-C8 alpha olefin except the carbon atom number 3 (propylene) copolymerized with propylene may be used 1 type, and may be used in combination of 2 or more type. .

  Specific examples of the propylene-α-olefin random copolymer (A2) include propylene-ethylene random copolymer, propylene-butene-1 random copolymer, propylene-pentene-1 random copolymer, propylene-hexene. -1 random copolymers, binary copolymers such as propylene-octene-1 random copolymers, propylene-ethylene-butene-1 random copolymers, propylene-ethylene-hexene-1 random copolymers Terpolymers such as propylene-ethylene random copolymer and propylene-ethylene-butene-1 random copolymer are preferable, and the propylene-ethylene random copolymer is excellent in physical property balance and easily available. Is particularly preferred.

(2) Blending ratio The blending amount of component (A) used in the present invention is 55 to 85% by weight, preferably 60 to 80% by weight, based on the total of 100% by weight of component (A) and component (B). More preferably, it is 65 to 75% by weight. In other words, the amount of component (B) is 15 to 45% by weight, preferably 20 to 40% by weight, and more preferably 25 to 35% by weight.
By setting the blending amount of the component (A) in such a range, in the polypropylene resin composition of the present invention, the raw material made from the raw material, and the molded body made from the raw material, the flexural modulus, impact strength Further, the moldability (MFR) and transparency are all good, the tensile strength is also good, and the balance can be good. That is, when the blending amount of the component (A) is less than 55% by weight, the rigidity (flexural modulus) and moldability of the composition of the present invention, the raw material made from the raw material, and the molded body made from the raw material. In addition, transparency may be deteriorated. On the other hand, when the amount of component (A) exceeds 85% by weight, impact strength and the like may be reduced.

(3) Manufacturing method of component (A1) and component (A2) The manufacturing method of component (A1) and component (A2) is the conditions (A1-i) to (A1-iii) and the conditions (A2-i) to ( The polymer is not particularly limited as long as a polymer satisfying A2-iv) can be obtained, and can be produced by a known production method.
The catalyst used for obtaining the component (A1) and the component (A2) used in the present invention is not particularly limited, and a known catalyst can be used. For example, a so-called Ziegler-Natta catalyst (for example, described in “Polypropylene Handbook” (published on May 15, 1998, first edition)) or a metallocene catalyst (for example, Japanese Patent Laid-Open No. Hei 5), which combines a titanium compound and an organic aluminum -295022 etc.) can be used.

  In particular, it is preferable to use a metallocene catalyst for the production of the component (A2) used in the present invention. That is, the propylene-α-olefin random copolymer (A2) used in the present invention is preferably a metallocene random copolymer. This is to maintain the rigidity (flexural modulus) in a good range by using a so-called metallocene random copolymer using a metallocene catalyst to obtain a propylene-α-olefin random copolymer (A2). This is because good transparency can be obtained.

The polymerization process used for obtaining the component (A1) and the component (A2) used in the present invention is not particularly limited, and a known polymerization process can be used. For example, a slurry polymerization method, a bulk polymerization method, a gas phase polymerization method and the like can be used. Further, either batch polymerization method or continuous polymerization method can be used, and if desired, a multi-stage continuous polymerization method such as two-stage or three-stage may be used. It can also be produced by mechanically melting and kneading two or more propylene polymers.
In addition, as for the polypropylene resin that can be used as the component (A1) and the component (A2), various products are commercially available from many companies. For example, products that can be used as the component (A1) are manufactured by Nippon Polypro Co., Ltd. Examples of products that can use Novatec series as component (A2) include Wintech series manufactured by Nippon Polypro. It is also possible to purchase and use products having desired physical properties from these commercially available products.

(4) Production method of component (A) The component (A) used in the present invention comprises the above-mentioned component (A1), component (A2), and optional addition components to be described later, if necessary, in a necessary blending ratio. Ordinary methods such as tumbler mixer, super mixer, Henschel mixer, screw blender, ribbon blender, single screw extruder, twin screw extruder, Banbury mixer, roll mixer, Brabender-plastograph, kneader etc. It can manufacture by kneading and granulating using the kneading machine.

  In this case, it is desirable to select a kneading and granulating method capable of improving the dispersion of each component, and usually a twin screw extruder is used. In this kneading and granulation, the above-mentioned blends of the respective components may be kneaded at the same time. Also, in order to improve the production efficiency, the respective components are collectively treated, for example, the component (A1) and the component (A2). And the component (B) mentioned later and the arbitrary addition component used as needed can also be knead | mixed and granulated collectively. Even when such batch kneading is performed, it goes without saying that the conditions (Ai) to (A-iii) are satisfied when kneaded using only the component (A1) and the component (A2).

2. Ingredient (B)
The component (B) used in the present invention satisfies the following conditions (B1-i) to (B1-iii) and the following conditions (B2-i) to (B2-iii): And at least one elastomer selected from the group consisting of component (B2).
Condition (B1-i): Component (B1) is an ethylene-α-olefin elastomer, and the α-olefin is an α-olefin having 4 to 8 carbon atoms.
Condition (B1-ii): The density of the component (B1) is 0.86 to 0.92 g / cm ³ .
Condition (B1-iii): The melt flow rate (230 ° C., 2.16 kg load) of the component (B1) is 0.5 to 100 g / 10 minutes.
Condition (B2-i): Component (B2) is a styrene-based elastomer.
Condition (B2-ii): The density of the component (B2) is 0.88 to 0.94 g / cm ³ .
Condition (B2-iii): The melt flow rate (230 ° C., 2.16 kg load) of the component (B2) is 1 to 30 g / 10 minutes.

(1) About each requirement (1-1) Condition (Bi)
The component (B) used in the present invention satisfies the following conditions (B1-i) to (B1-iii) and the following conditions (B2-i) to (B2-iii): And at least one elastomer selected from the group consisting of component (B2). By using such an elastomer as the component (B), the polypropylene resin composition of the present invention, the raw material made from the raw material, and the molded body made from the raw material have good moldability (fluidity). Thus, performances such as rigidity (flexural modulus), impact properties (impact strength), and transparency can be further improved.

(1-2) Condition (B1-i)
The component (B1) used in the present invention is an ethylene-α-olefin elastomer, and the α-olefin is an α-olefin having 4 to 8 carbon atoms.
Examples of the ethylene-α-olefin elastomer include an ethylene / propylene copolymer elastomer (EPR), an ethylene / butene copolymer elastomer (EBR), an ethylene / hexene copolymer elastomer (EHR), and an ethylene / octene copolymer. Ethylene / α-olefin copolymer elastomers such as united elastomer (EOR); ethylene / α-olefins such as ethylene / propylene / ethylidene norbornene copolymers, ethylene / propylene / butadiene copolymers, ethylene / propylene / isoprene copolymers Examples thereof include olefin / diene terpolymer elastomer.
Among these, when an ethylene-octene copolymer elastomer (EOR) or an ethylene-butene copolymer elastomer (EBR) is used, the polypropylene resin composition of the present invention, a raw material made from it, and a raw material as a raw material. In molded products, in addition to moldability, performance such as rigidity (flexural modulus), impact properties (impact strength), and transparency is much better, more easily available, and often more economical. To preferred. In particular, when an ethylene-octene copolymer elastomer (EOR) is used as the component (B1) and the component (B) contains the ethylene-octene copolymer elastomer (EOR) as the component (B1), the polypropylene-based polymer of the present invention is used. In addition to moldability, the resin composition, the raw material made from the raw material and the molded body made from the raw material, are particularly excellent in performance such as rigidity (flexural modulus), impact (impact strength), and transparency. Furthermore, it is particularly preferable because it is easily available and is economical.

(1-3) Condition (B1-ii): Density The component (B1) used in the present invention has a density of 0.86 to 0.92 g / cm ³ , preferably 0.863 to 0.90 g / cm ^3. More preferably, it is in the range of 0.865 to 0.88 g / cm ³ . By setting the density in such a range, both the rigidity (bending elastic modulus) and impact strength are good in the polypropylene resin composition of the present invention, the raw material made from it and the molded body made from it. Can be made. That is, when the density is less than 0.86 g / cm ³ , the rigidity (flexural modulus) is lowered in the polypropylene resin composition of the present invention, the raw material made from the raw material and the molded body made from the raw material. On the other hand, if the density exceeds 0.92 g / cm ³ , the impact strength may be reduced.

(1-4) Condition (B1-iii): Melt flow rate (MFR)
The MFR (230 ° C., 2.16 kg load) of the component (B1) used in the present invention is in the range of 0.5 to 100 g / 10 minutes, preferably 1.5 to 50 g / 10 minutes, more preferably 2 It is in the range of ˜15 g / 10 minutes. By setting the MFR in such a range, the polypropylene resin composition of the present invention, the raw material made from the raw material and the molded body made from the raw material, and suitable impact strength while maintaining good moldability It is possible to set the range. That is, when the MFR is less than 0.5 g / 10 min, the moldability (fluidity) of the polypropylene resin composition of the present invention, the raw material made from the raw material and the molded body made from the raw material is lowered. On the other hand, if the MFR exceeds 100 g / 10 min, the impact strength may be reduced.
Various ethylene-α-olefin elastomers that can be used as component (B1) are commercially available from many companies. For example, Engage series manufactured by Dow Chemical Co., Ltd. and Tuffmer manufactured by Mitsui Chemicals, Inc. Series etc. can be mentioned. A product having desired physical properties can be purchased from these commercially available products and used.

(1-5) Condition (B2-i):
The component (B2) used in the present invention is a styrene elastomer.
Examples of the styrene elastomer include styrene / butadiene / styrene triblock copolymer elastomer (SBS), styrene / isoprene / styrene triblock copolymer elastomer (SIS), and styrene-ethylene / butylene copolymer elastomer (SEB). ), Styrene-ethylene / propylene copolymer elastomer (SEP), styrene-ethylene / butylene-styrene copolymer elastomer (SEBS), styrene-ethylene / butylene-ethylene copolymer elastomer (SEBC), hydrogenated styrene / butadiene Elastomer (HSBR), Styrene-ethylene / propylene-styrene copolymer elastomer (SEPS), Styrene-ethylene / ethylene / propylene-styrene copolymer elastomer (SEEPS) Styrene - butadiene butylene - styrene copolymer elastomer (SBBS) can be exemplified. Among them, in the polypropylene resin composition of the present invention, a raw material made from the same and a molded body made from the same, the impact strength is good, the availability is easy, and the styrene is excellent. -Ethylene / butylene-styrene copolymer elastomer (SEBS) is preferred.

(1-6) Condition (B2-ii): Density The component (B2) used in the present invention has a density in the range of 0.88 to 0.94 g / cm ^{3 and} 0.88 to 0.92 g / cm. cm ³ is preferred. By setting the density in such a range, both the rigidity (bending elastic modulus) and impact strength are good in the polypropylene resin composition of the present invention, the raw material made from it and the molded body made from it. Can be made. That is, when the density is less than 0.88 g / cm ³ , the rigidity (flexural modulus) is lowered in the polypropylene resin composition of the present invention, the raw material made from the raw material, and the molded body made from the raw material. On the other hand, if the density exceeds 0.94 g / cm ³ , the impact strength may be reduced.

(1-7) Condition (B2-iii): Melt flow rate (MFR)
The MFR (230 ° C., 2.16 kg load) of the component (B2) used in the present invention is in the range of 1 to 30 g / 10 minutes, preferably 2 to 15 g / 10 minutes, more preferably 3 to 10 g / It is within the range of 10 minutes, more preferably 4 to 5 g / 10 minutes. By setting the MFR in such a range, the polypropylene resin composition of the present invention, the raw material made from the raw material and the molded body made from the raw material, and suitable impact strength while maintaining good moldability It is possible to set the range. That is, when the MFR is less than 1 g / 10 min, the polypropylene resin composition of the present invention, the raw material made from the raw material, and the moldability (fluidity) of the molded body made from the raw material tend to be lowered. On the other hand, if the MFR exceeds 30 g / 10 minutes, the impact strength may be reduced.

  In addition, as for the styrene-type elastomer which can be used as a component (B2), various products are marketed from many companies, for example, the Asahi Kasei Corporation Tuftec series etc. can be mentioned. From these commercially available products, products having desired physical properties can be purchased and used.

(2) Condition (B-ii): Blending ratio In the present invention, component (B) includes both component (B1) and component (B2), and satisfies the following condition (B-ii): preferable.
Condition (B-ii)
The component (B) contains 60 to 95% by weight of the component (B1) and 5 to 40% by weight of the component (B2) (provided that the total of the component (B1) and the component (B2) is 100% by weight. To do).

  That is, the blending amount of the component (B1) and the component (B2) in the component (B) is 60 to 95% by weight of the component (B1) based on the total of 100% by weight of the component (B1) and the component (B2). , Preferably 65 to 85% by weight, more preferably 70 to 80% by weight. In other words, the component (B2) is 5 to 40% by weight, preferably 15 to 35% by weight, and more preferably 20 to 30% by weight. By adopting such an embodiment, it is possible to achieve a good impact strength while maintaining a higher rigidity (flexural modulus), as well as a good moldability (fluidity), and a better balance of physical properties. An excellent polypropylene resin composition of the present invention can be obtained. That is, when the blending amount of the component (B1) is less than 60% by weight, the rigidity (flexural modulus) and moldability of the polypropylene resin composition of the present invention and the molded product thereof may be deteriorated. On the other hand, when the amount of the component (B1) exceeds 95% by weight, impact properties and the like tend to decrease.

(3) Condition (A): Density ratio It is preferable that the polypropylene resin composition of the present invention further satisfies the following condition (A).
Condition (a): Among the propylene homopolymers constituting the propylene homopolymer (A1), the density d (A1 ′) of the propylene homopolymer (A1 ′) having the highest density and the component (B) are constituted. Among the elastomers, the density d (B ′) of the lowest density component (B ′) satisfies the relationship of the following formula (1).
1.0 ≧ d (B ′) / d (A1 ′) ≧ 0.963 Formula (1)
Moreover, it is preferable to satisfy the relationship of the following formula | equation (1 ').
0.98 ≧ d (B ′) / d (A1 ′) ≧ 0.964 Formula (1 ′)

  In this formula, the ratio of the density of the propylene homopolymer constituting the propylene homopolymer (A1) and the density of the elastomer constituting the component (B) is close to 1.0, that is, the density of both is the same. It means that it is a correct value. In general, since the propylene homopolymer (A1) is crystalline, the density is higher than that of the elastomer constituting the component (B). Generally, the density of the propylene-α-olefin random copolymer (A2) is located between the density of the propylene homopolymer (A1) and the density of the component (B) that is an elastomer. That is, the fact that the polypropylene resin composition of the present invention satisfies the condition (a) means that the density of the component (A1), the component (A2) and the component (B) constituting the component (A) is almost the same value ( Means close density). When the polypropylene resin composition of the present invention satisfies the condition (a), mixing and dispersion during kneading of these components becomes easy and homogeneous, and the polypropylene resin composition of the present invention is used as a raw material. The raw material to be molded and the molded body made from the same have excellent moldability (fluidity), and more excellent performance such as rigidity (flexural modulus), impact (impact strength), and transparency. In addition, it is possible to manufacture more efficiently.

3. Original Adhesive Material The polypropylene resin composition of the present invention is preferably used as a polypropylene resin composition for an original material because the characteristics of the polypropylene resin composition of the present invention can be utilized well.
The raw material of the present invention, which is made from the polypropylene resin composition of the present invention and a pigment, has good moldability (fluidity) when the raw material is formed into a molded body, and the rigidity of the resulting molded body Performances such as (flexural modulus), impact properties (impact strength), and transparency are excellent. Here, being excellent in transparency means that a good color developability is exhibited when making an original material containing a pigment.
(1) Pigment The raw material of the present invention can be obtained using the polypropylene resin composition of the present invention and the pigment as raw materials. Here, among the pigments, it is preferable to use a glittering material because the characteristics of the polypropylene resin composition of the present invention, which is excellent in transparency and exhibits good color developability, can be exhibited well.

  Here, the pigments other than the glittering material include black carbon black, iron black; white titanium oxide, zinc white, lithbon, lead white; blue bitumen, ultramarine blue, cobalt blue, phthalocyanine blue, and indanthrene. Blue RS, First Sky Blue Lake, Alkaline Blue Lake, Victoria Blue Lake; red-based petal, lead charcoal, molybdenum red, cadmium red, lake red C, lake red D, brilliant carmine 6B, resol red, permanent red 4R, Watching Red, Thioindigo Red, Alizarin Red, Quinacridone Red, Rhodamine Lake, Orange Lake, Benzimidazolone Red, Pyrazolone Red, Condensed Azo Red, Perylene Red, Permanent Carmine FB, Quinacridone Magenta Yellow lead, cadmium yellow, titanium yellow, iron yellow, isoindolinone yellow, benzidine yellow, first yellow, flavonthrone yellow, naphthol yellow, quinoline yellow, benzimidazolone yellow, HR yellow, condensed azo yellow; green chrome green Chrome oxide, guine green, spinel green, phthalocyanine green, pigment green B, naphthol green, acid green rake, malachite green rake; orange chrome orange, cadmium orange, benzimidazolone orange, perinone orange; tea zinc Ferrites; purple manganese purple, cobalt purple, purple petals, first violet B, methyl violet lake, dioxazine violet, etc. Kill.

  Among the pigments used in the present invention, a bright material is preferably used as a raw material. As the brightening agent, a substance having the property of coexisting with other pigments or exhibiting a metallic feeling (metallic tone) alone when mixed in the polypropylene resin composition of the present invention is applicable. Specifically, metal flakes such as aluminum; metal foils such as aluminum foil and vapor-deposited aluminum foil; pearl mica coated with metal oxides such as titanium oxide and iron oxide on natural or synthetic mica, and a film layer of metal oxide Interference mica that uses the difference in refractive index between the substrate and the film by changing the thickness and uses interference of reflected light for color development, colored mica coated with a colored oxide such as iron oxide, etc .; copper powder, zinc powder, and Freunds powder And metal powders such as stainless steel powder and aluminum powder; glass flakes coated with metal, alloy or oxide thereof (specifically, gold, silver, silver alloy, brass, bronze, titanium, titanium dioxide, etc.). Metal flakes, pearl mica, interference mica, and metal-coated glass flakes are preferable, and aluminum flakes are more preferable.

As the shape of the brightening agent, there are flakes, powders and the like, and those having a flakes are particularly preferable. Furthermore, it is preferable that the average particle diameter is 5-200 micrometers, especially 40-90 micrometers. If the average particle size of the brightening agent is less than 5 μm, the high luster feeling may be insufficient, and if the average particle size exceeds 200 μm, the high luster feeling may be lost and the high quality texture may be impaired. Further, if it is out of these ranges, the impact performance may be lowered. The average particle size of the brightening agent may be determined using a laser diffraction particle size distribution measuring device.

  In the present invention, the amount of the pigment is usually 0.01 to 20 parts by weight, preferably 0.05 to 15 parts by weight, more preferably 0.1 to 10 parts by weight per 100 parts by weight of the polypropylene resin composition. More preferably, it is 0.15-5 weight part, Most preferably, it is 0.2-2 weight part. By adjusting the blending amount within the above range, it is possible to obtain a good colorability with easy toning, and in particular, when a glittering material is used, it is possible to obtain a good metal feeling and good It becomes possible to obtain mechanical properties. In other words, when the blending amount of the pigment is less than the above range, toning may be difficult, or when a brightening agent is used, the appearance of the metallic tone appearance may be insufficient. Moreover, when the compounding quantity of a pigment exceeds the said range, there exists a possibility that the problem that a mechanical physical property may fall may arise while the addition effect of a pigment or a brightening agent is saturated.

  Although the pigment and the brightening agent can be directly blended into the polypropylene resin composition, it is preferably used in the form of a masterbatch from the handling of the pigment and the brightening agent and the operability of blending. For example, a masterbatch having a pigment or glittering material content of 20 to 80% by weight using polyethylene wax or polyethylene as a matrix component can be used.

4). Optional addition component In the polypropylene-based resin composition of the present invention, in addition to the above components (A) and (B), if necessary, the desired effects can be further increased within a range not significantly impairing the effects of the present invention. In order to improve or impart other performances and effects, optional additives can be blended. The addition amount of the optional additive component is 0.2 to 2.0% by weight based on the whole polypropylene resin composition.
Specific optional components include non-ionic antistatic agents, hindered amine light stabilizers, benzotriazole ultraviolet absorbers, physical foaming agents, and organic metal salt dispersions. Agents, phenolic antioxidants, inorganic compounds, neutralizing agents, fatty acid amides, lubricants, nitrogen compounds, metal deactivators, nonionic surfactants, thiazoles, etc. Flame retardants such as glazes, halogen compounds, fluorescent brighteners, bubble prevention (antifoaming) agents, crosslinking agents, peroxides, process oils (blending oils), antiblocking agents, plasticizers, other than the above component (A) Polyolefins such as polypropylene, thermoplastic resins such as polyamide and polyester, fillers such as talc, elastomers (rubber-like polymers) other than the above component (B), and other additives And the like. These components may be used in combination of two or more, and may be added later to the polypropylene resin composition of the present invention, or may be added to each component. You may use together.

[II] Production of Polypropylene Resin Composition The polypropylene resin composition of the present invention comprises the above component (A), component (B), and, if necessary, the above optional additive components in the above blending ratio. Ordinary kneading machines such as mixers, super mixers, Henschel mixers, screw blenders, ribbon blenders, etc., or single kneaders, twin screw extruders, Banbury mixers, roll mixers, brabender-plastographs, kneaders, etc. It can manufacture by kneading and granulating using.

  In this case, it is desirable to select a kneading and granulating method capable of improving the dispersion of each component, and usually a twin screw extruder is used. In this kneading and granulation, the above-mentioned blends of the respective components may be kneaded at the same time, and each component is divided in order to improve performance, for example, first, component (A), component (B) It is also possible to knead a part or all of the above, and then knead and granulate the remaining components.

[III] Manufacture of raw material The raw material of the present invention includes the polypropylene resin composition of the present invention, a pigment, and, if necessary, the above optional additive components in the above mixing ratio, and a tumbler mixer and a super mixer. , Mixing by known methods such as Henschel mixer, screw blender, ribbon blender, etc., or kneading using ordinary kneaders such as single screw extruder, twin screw extruder, Banbury mixer, roll mixer, Brabender-plastograph, kneader -It can be manufactured by granulating. The pigment may be used as it is, or may be used as a so-called master batch diluted with another resin. Moreover, a pigment can be added at the time of manufacture of the said polypropylene resin composition, and a raw material can also be manufactured directly.

  In any case, it is desirable to select a kneading and granulating method capable of improving the dispersion of each component, and a twin-screw extruder is usually used. In this kneading and granulation, the above-mentioned blends of the respective components may be kneaded at the same time, and each component is divided in order to improve performance, for example, first, component (A), component (B) It is also possible to knead a part or all of the above, and then knead and granulate the remaining components.

[IV] Molding and application of raw materials Molding The raw material of the present invention is preferably molded by injection molding (including gas injection molding) or injection compression molding (including press injection, hot flow stamping molding, gas injection compression molding). A desired molded article can be obtained by combining injection molding or injection compression molding techniques with so-called foam molding techniques or expansion molding techniques.
For the molding of the polypropylene resin composition, various types of molding such as hollow molding, extrusion molding, compression (press) molding, foaming (expansion) molding, sheet molding, thermoforming, stamping molding, powder molding, etc., as necessary. A molding method can also be applied, whereby a desired molded body can be obtained.

2. Applications and others Since the polypropylene resin composition of the present invention is excellent in rigidity (flexural modulus), impact properties and transparency in addition to moldability, the raw material made from the raw material is moldability, rigidity ( In addition to flexural modulus and impact properties, it has good color development. Therefore, automotive interior and exterior such as instrument panels, glove boxes, console boxes, door trims, armrests, grip knobs, various trims, ceiling parts, housings, pillars, mudguards, bumpers, fenders, back doors, fan shrouds, etc. It can be suitably used for applications such as parts in engine rooms, electric and electronic equipment parts such as TVs and vacuum cleaners, various industrial parts, housing equipment parts such as toilet seats, and building material parts.

  The fact that the polypropylene-based resin composition of the present invention, the raw material made from the raw material and the molded body made from the raw material show good rigidity (flexural modulus) has sufficient rigidity in practical use. Means that. The measurement of the rigidity (flexural modulus) is a value measured at a test temperature = 23 ° C. according to JIS K7203, and the unit is MPa. In the polypropylene resin composition of the present invention, the raw material made from the raw material, and the molded body made from the raw material, it can be put to practical use when the bending elastic modulus is 1000 MPa or more. In particular, the tensile strength is preferably 1100 MPa or more.

The polypropylene resin composition of the present invention, the raw material made from the raw material, and the molded article made from the raw material show good impact strength. It means having strength. The measurement of the impact strength is a value measured at a test temperature = 23 ° C. according to JIS K7111, and the unit is kJ / m ² . In the polypropylene resin composition and the molded body thereof according to the present invention, when the impact strength is 27 kJ / m ² or more, it can be put to practical use and is good. In particular, the impact strength is preferably 30 kJ / m ² or more.

  The fact that the polypropylene-based resin composition of the present invention, the raw material made from the raw material and the molded body made from the raw material exhibit good moldability means that various molded bodies can be easily produced. . The moldability is evaluated based on the measured value of MFR, measured in accordance with JIS K7210 at a test temperature of 230 ° C. and a load of 2.16 kg, and the unit is g / 10 minutes. In the polypropylene resin composition of the present invention and the molded product thereof, when the MFR is 20 g / 10 min or more, it can be put to practical use and is good. In particular, the MFR is preferably 25 g / 10 min or more.

  The polypropylene-based resin composition of the present invention, the raw material made from the raw material, and the molded body made from the raw material exhibit good transparency means that when the raw material is made using various pigments, It means that color developability is good. The transparency is evaluated by the haze value measured according to JIS K7105. In the polypropylene resin composition of the present invention, the raw material made from the raw material, and the molded body made from the raw material, the haze of 90 or less can be put to practical use and is good. In particular, the haze is preferably 60 or less.

EXAMPLES 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, analysis methods and materials used in the examples are as follows.

1. Evaluation method, analysis method (1) Melt flow rate (MFR):
In accordance with JIS K7210, measurement was performed at a test temperature = 230 ° C. and a load = 2.16 kg (unit: g / 10 minutes).
In addition, about the MFR of the whole polypropylene resin composition, the moldability was determined according to the following evaluation criteria.
○: 20 g / 10 min or more.
X: Less than 20 g / 10 minutes.

(2) Flexural modulus Measured according to JIS K7203 at a test temperature of 23 ° C. and a test speed of 2.0 mm / min (unit: MPa). The test piece used was an EC75SX injection molding machine manufactured by Toshiba Machine Co., Ltd., and a test piece having a thickness of 4.0 mm, a width of 10.0 mm, and a length of 80.0 mm was molded and used at a molding temperature of 200 ° C. and a mold temperature of 40 ° C. .
In addition, about the bending elastic modulus of the whole polypropylene resin composition, it determined by the following evaluation criteria.
○: 1000 MPa or more.
X: Less than 1000 MPa.

(3) Impact strength (Charpy impact strength (notched)):
Based on JIS K7111 (with notch), it was measured at a test temperature of 23 ° C. (unit: kJ / m ² ). The test piece was an EC75SX injection molding machine manufactured by Toshiba Machine Co., Ltd., with a molding temperature of 200 ° C., a mold temperature of 40 ° C., and a notch (notch radius of 0.25 mm), a thickness of 4.0 mm, a width of 10.0 mm, and a length of 80 A 0.0 mm test piece was molded and used.
In addition, about the impact strength of the whole polypropylene resin composition, it determined by the following evaluation criteria.
○: 30 kJ / m ² or more.
△: 27kJ / ^{m 2} or more, 30 kJ / ^{m 2} less ×: 27kJ / ^m less than ^2.

(4) Haze A test piece was prepared in the following manner and measured according to JIS K7105.
-Molding machine: Toshiba Machine EC20 type injection molding machine.
Mold: One test specimen for evaluation (80 × 40 × 1 t (mm)) is taken.
Molding conditions: molding temperature 200 ° C., mold temperature 40 ° C., injection pressure 50 MPa, injection time 8 seconds, cooling time 12 seconds.
In addition, about the haze of the whole polypropylene resin composition, it determined by the following evaluation criteria.
○: 60 or less.
Δ: Over 60, 90 or less ×: Over 90

(5) Comprehensive evaluation Based on the determination results of four items of melt flow rate (MFR), flexural modulus, Charpy impact strength and haze, comprehensive evaluation was performed according to the following evaluation criteria. Among the following evaluations, evaluations of Δ and ○ are practical levels.
○: All the evaluations on the four items are ○, which is very good.
Δ: There is no evaluation at all for the four items, and Δ evaluation exists but it is practical.
X: There are one or more x evaluations for four items, which are not suitable for practical use.

(6) Tensile strength:
Based on JIS K7161, the measurement was performed at a test temperature of 23 ° C. and a test speed of 50 mm / min (unit: MPa). The test piece used was an EC75SX injection molding machine manufactured by Toshiba Machine Co., Ltd., and a dumbbell-shaped tensile test piece (type A) was molded at a molding temperature of 200 ° C. and a mold temperature of 40 ° C.

(7) Melting peak temperature (Tm):
Using a Seiko Instruments DSC6200 model, take 5.0 mg of sample, hold it at 200 ° C for 5 minutes, crystallize it to 40 ° C at a rate of 10 ° C / min. Measured after melting.

(8) α-olefin content (ethylene content)
The ethylene content in the propylene-ethylene random copolymer used as the propylene-α-olefin random copolymer was determined by analyzing a ¹³ C-NMR spectrum according to the following conditions by a proton complete decoupling method. .
-Model: GSX-400 (carbon nuclear resonance frequency of 100 MHz or more) manufactured by JEOL Ltd.
Solvent: o-dichlorobenzene + heavy benzene (4: 1 (volume ratio))
Concentration: 100 mg / mL
・ Temperature: 130 ℃
・ Pulse angle: 90 °
・ Pulse interval: 15 seconds ・ Number of integrations: 5,000 times or more The attribution of the spectrum may be performed with reference to Macromolecules 17, 1950 (1984), for example. The attribution of spectra measured under the above conditions is as shown in Table 1 below. Table 1 Symbols such as S _{alpha alpha} in accordance with conventions of Carman et al. (Macromolecules 10,536 (1977)), P is methyl carbon, S is a methylene carbon, T is a methine carbon represented respectively.

Hereinafter, when “P” is a propylene unit in a copolymer chain and “E” is an ethylene unit, six types of triads of PPP, PPE, EPE, PEP, PEE, and EEE may exist in the chain. . As described in Macromolecules 15, 1150 (1982), the concentration of these triads and the peak intensity of the spectrum are linked by the following relational expressions (1) to (6).
[PPP] = k × I (T _ββ ) (1)
[PPE] = k × I (T _βδ ) (2)
[EPE] = k × I (T _δδ ) (3)
[PEP] = k × I (S _ββ ) (4)
[PEE] = k × I (S _βδ ) (5)
[EEE] = k × {I (S _δδ ) / 2 + I (S _γδ ) / 4} (6)
Here, [] indicates the fraction of triads, for example, [PPP] is the fraction of PPP triads in all triads. Therefore,
[PPP] + [PPE] + [EPE] + [PEP] + [PEE] + [EEE] = 1 (7)
It is.
Further, k is a constant, I indicates the spectral intensity, and for example, I (T _ββ ) means the intensity of the peak at 28.7 ppm attributed to T _ββ .
By using the relational expressions (1) to (7) above, the fraction of each triad is obtained, and the ethylene content is obtained from the following expression.
Ethylene content (mol%) = ([PEP] + [PEE] + [EEE]) × 100
The propylene random copolymer according to the present invention contains a small amount of a propylene hetero bond (2,1-bond and / or 1,3-bond), thereby producing the minute peak shown in Table 2.

In order to obtain an accurate ethylene content, it is necessary to include the peaks derived from these heterogeneous bonds in the calculation, but it is difficult to completely separate and identify the peaks derived from the heterogeneous bonds. Therefore, the ethylene content of the propylene-ethylene random copolymer is the same as in the analysis of the copolymer produced with a Ziegler-Natta catalyst that does not substantially contain a heterogeneous bond. It is determined using the relational expression 7).
The conversion of the ethylene content from mol% to wt% is performed using the following formula.
Ethylene content (% by weight) = (28 × X / 100) / {28 × X / 100 + 42 × (1−X / 100)} × 100
Here, X is the ethylene content in mol%.

(9) Density Based on JIS K7112, it was measured at a test temperature of 23 ° C. The test piece used was an EC75SX injection molding machine manufactured by Toshiba Machine Co., Ltd., and a test piece having a thickness of 4.0 mm, a width of 10.0 mm, and a length of 80.0 mm was molded and used at a molding temperature of 200 ° C. and a mold temperature of 40 ° C. .

2. Material (1) Component (A):
(1-1) Component (A1): Propylene homopolymer A1-a: Novatec PP, MA04A (manufactured by Nippon Polypro)
Propylene homopolymer produced using a Ziegler catalyst, melt flow rate (MFR, 230 ° C., 2.16 kg load) 40 g / 10 min, melting peak temperature (Tm) = 166 ° C., tensile strength: 40 MPa, density 0.900 g / cm ³ .

(1-2) Component (A2): Propylene-α-olefin copolymer A2-a: Wintech, WMG03 (manufactured by Nippon Polypro)
Propylene-ethylene random copolymer (ethylene concentration: 0.9% by weight), melt flow rate (MFR, 230 ° C., 2.16 kg load) 30 g / 10 min, melting peak temperature, produced using a metallocene catalyst (Tm) = 142 ° C., tensile strength: 30 MPa.

(2) Component (B)
Hereinafter, the density of the component (B) is a catalog value.
(2-1) Component (B1): Ethylene-α-olefin elastomer B1-a: Engagement, EG8200 (manufactured by Dow Chemical Company)
Ethylene-octene copolymer elastomer, melt flow rate (MFR, 230 ° C., 2.16 kg load) 10 g / 10 min, density 0.870 g / cm ³ , shape = pellet.

(2-2) Component (B1): Ethylene-α-olefin elastomer B1-b: Tuffmer, A4070S (Mitsui Chemicals)
Ethylene-butene copolymer elastomer, melt flow rate (MFR, 230 ° C., 2.16 kg load) 6.7 g / 10 min, density 0.870 g / cm ³ , shape = pellet.

(2-3) Component (B1): Ethylene-α-olefin elastomer B1-c: Tafmer, A4050S (Mitsui Chemicals)
Ethylene-butene copolymer elastomer, melt flow rate (MFR, 230 ° C., 2.16 kg load) 6.7 g / 10 min, density 0.864 g / cm ³ , shape = pellet.

(2-4) Component (B1): Ethylene-α-olefin elastomer B1-d: Tuffmer, A1050S (Mitsui Chemicals)
Ethylene-butene copolymer elastomer, melt flow rate (MFR, 230 ° C., 2.16 kg load) 2.2 g / 10 min, density 0.862 g / cm ³ , shape = pellet.

(2-5) Component (B2): Styrenic elastomer B2-a: Tuftec, H1062 (Asahi Kasei Co., Ltd.)
Hydrogenated styrene-based thermoplastic elastomer, melt flow rate (MFR, 230 ° C., 2.16 kg load) 4.5 g / 10 min, density 0.890 g / cm ³ , shape = pellet.

3. Examples and Comparative Examples [Examples 1 to 5 and Comparative Example 1]
(1) Production and Evaluation of Polypropylene Resin Composition Per 100 parts by weight of the total amount of the component (A) and component (B) and the component (A) and component (B) shown in Table 3 0.1 part by weight of IRGANOX1010 "and 0.05 part by weight of" IRGAFOS168 "manufactured by BASF are mixed, and using a kneading apparatus (" KZW-15-MG "type twin screw extruder manufactured by Technobel) Kneading conditions: Temperature = 200 ° C., screw rotation speed = 400 rpm, discharge rate = 3 kg / Hr, kneading and granulating to produce polypropylene resin composition pellets. The obtained polypropylene resin composition was evaluated. The results are shown in Table 3.
In Table 3, the blending amount of each component is shown as% by weight with respect to the total of component (A) and component (B). The numerical values in parentheses are the weight percentages of (A1) and (A2) relative to component (A) (the sum of (A1) and (A2)), or component (B) ((B1) and (B2) %) Of (B1) and (B2).

4). Evaluation From the results shown in Table 3, Examples 1 to 5 satisfying the invention requirements of the polypropylene resin composition of the present invention, the raw material made from the same and the molded body made from the raw material, the moldability In addition, it has excellent rigidity (flexural modulus), impact properties and transparency. The excellent transparency means that the color developability is good when a pigment (brighting material) is used as an original material.
Thus, since Examples 1 to 5 are judged to have reached good or practical levels in all evaluations, the polypropylene resin composition of the present invention includes an instrument panel, a glove box, a console box, Door trims, armrests, grip knobs, various trims, ceiling parts, housings, pillars, mudguards, bumpers, fenders, back doors, fan shrouds, and other automotive interior and engine room parts, TVs, vacuum cleaners, etc. It has become clear that it can be suitably used in applications where pigments (brilliant materials) are used among applications such as electrical / electronic equipment parts, various industrial parts, toilet equipment parts such as toilet seats, and building material parts. .

  On the other hand, the polypropylene resin composition having the composition shown in Comparative Example 1 that does not satisfy the specific matters of the present invention is determined to have a poor performance balance and cannot be practically used in at least one of the evaluation items. It is inferior to Examples 1-5.

  In addition to moldability, the polypropylene resin composition of the present invention, the raw material made from it and the molded body made from it are excellent in rigidity (flexural modulus), impact and transparency. Therefore, automotive interior and exterior such as instrument panels, glove boxes, console boxes, door trims, armrests, grip knobs, various trims, ceiling parts, housings, pillars, mudguards, bumpers, fenders, back doors, fan shrouds, etc. Among applications such as engine room parts, electrical and electronic equipment parts such as TVs and vacuum cleaners, various industrial parts, housing equipment parts such as toilet seats, building material parts, etc. It can be used suitably.

Claims (7)

Component (A) 55-85% by weight satisfying the following conditions (Ai) to (A-iii) on the basis of the total of 100% by weight of components (A) and (B), and the following conditions (B- A polypropylene resin composition comprising a component (B) satisfying i) in an amount of 15 to 45% by weight.
Condition (Ai): Component (A) is a propylene homopolymer (A1) that satisfies the following conditions (A1-i) to (A1-iii): 40 to 90% by weight; i) to (A2-iv) satisfying 10 to 60% by weight of a propylene-α-olefin random copolymer (A2) (provided that the propylene homopolymer (A1) and the propylene-α-olefin random copolymer) The total with the polymer (A2) is 100% by weight).
Condition (A1-i): The melt flow rate (230 ° C., 2.16 kg load) of the propylene homopolymer (A1) is 0.5 to 100 g / 10 min.
Condition (A1-ii): In the measurement by the DSC method, the propylene homopolymer (A1) exhibits a peak of melting peak temperature (Tm) in the range of 150 to 175 ° C.
Condition (A1-iii): The tensile strength of propylene homopolymer (A1) measured by JIS K7161 is 25-50 MPa.
Condition (A2-i): The melt flow rate (230 ° C., 2.16 kg load) of the propylene-α-olefin random copolymer (A2) is 0.5 to 100 g / 10 min.
Condition (A2-ii): In the measurement by the DSC method, the propylene-α-olefin random copolymer (A2) exhibits a peak of melting peak temperature (Tm) in the range of 110 to 150 ° C.
Condition (A2-iii): The tensile strength of the propylene-α-olefin random copolymer (A2) measured by JIS K7161 is 15 to 35 MPa.
Condition (A2-iv): The α-olefin of the propylene-α-olefin random copolymer (A2) is an α-olefin having 2 to 8 carbon atoms (excluding 3 carbon atoms), and The α-olefin content is 0.1 to 5% by weight (provided that the total content of propylene and α-olefin in the propylene-α-olefin random copolymer (A2) is 100% by weight. ).
Condition (A-ii): The entire component (A) has a melt flow rate (230 ° C., 2.16 kg load) of 0.5 to 200 g / 10 minutes.
Condition (A-iii): In the measurement by the DSC method, the component (A) shows a peak of melting peak temperature (Tm) in the range of 110 to 175 ° C.
Condition (Bi): Component (B) includes component (B1) satisfying the following conditions (B1-i) to (B1-iii) and the following conditions (B2-i) to (B2-iii): At least one elastomer selected from the group consisting of the component (B2) satisfying
Condition (B1-i): Component (B1) is an ethylene-α-olefin elastomer, and the α-olefin is an α-olefin having 4 to 8 carbon atoms.
Condition (B1-ii): The density of the component (B1) is 0.86 to 0.92 g / cm ³ .
Condition (B1-iii): The melt flow rate (230 ° C., 2.16 kg load) of the component (B1) is 0.5 to 100 g / 10 minutes.
Condition (B2-i): Component (B2) is a styrene elastomer.
Condition (B2-ii): The density of the component (B2) is 0.88 to 0.94 g / cm ³ .
Condition (B2-iii): The melt flow rate (230 ° C., 2.16 kg load) of the component (B2) is 1 to 30 g / 10 minutes. The polypropylene resin composition according to claim 1, wherein the polypropylene resin composition further satisfies the following condition (a).
Condition (a): Among the propylene homopolymers constituting the propylene homopolymer (A1), the density d (A1 ′) of the propylene homopolymer (A1 ′) having the highest density and the component (B) are constituted. Among the elastomers, the density d (B ′) of the lowest density component (B ′) satisfies the relationship of the following formula (1).
1.0 ≧ d (B ′) / d (A1 ′) ≧ 0.963 Formula (1)   The polypropylene resin composition according to claim 1 or 2, wherein the component (B) contains an ethylene-octene elastomer as the component (B1). The polypropylene resin composition according to any one of claims 1 to 3, wherein the component (B) includes both the component (B1) and the component (B2) and satisfies the following condition (B-ii).
Condition (B-ii)
The component (B) contains 60 to 95% by weight of the component (B1) and 5 to 40% by weight of the component (B2) (provided that the total of the component (B1) and the component (B2) is 100% by weight. To do).   The polypropylene resin composition according to any one of claims 1 to 4, wherein the propylene-α-olefin random copolymer (A2) is a metallocene random copolymer.   A raw material made from the polypropylene resin composition according to any one of claims 1 to 5 and a pigment.   The molded object whose raw material of Claim 6 is a raw material.