JP5210601B2 - Propylene resin composition - Google Patents

Description

  The present invention relates to a propylene-based resin composition having excellent impact resistance, and more specifically, a propylene-ethylene copolymer component produced by a multistage polymerization method using a Ziegler-Natta catalyst as a main component, and a multistage polymerization method. A crystalline propylene polymer component and a propylene-ethylene random copolymer comprising a sequentially produced copolymer in which a part of the crystalline propylene polymer component and the propylene-ethylene random copolymer component are chemically bonded The present invention relates to a propylene-based resin composition comprising a propylene-ethylene copolymer component composed of a coalescence component as an impact modifier component. Further, in addition to the above components, the present invention further relates to a propylene resin composition containing an ethylene / α-olefin elastomer or a styrene elastomer, and an inorganic filler, wherein the impact resistance is remarkably improved. .

Propylene resin, which is heavily used as an industrial material, is extremely excellent in rigidity and heat resistance, but has relatively low impact resistance, which is important as a physical property, so a random copolymer of propylene and ethylene, or polypropylene As a composition obtained by blending with a copolymer thereof, a technique for improving impact resistance has been often used.
In particular, such a composition obtained by a series of polymerization steps is typically produced by producing a crystalline polypropylene in the first step and a propylene-ethylene random copolymer in the second step. What was obtained is usually called a propylene-ethylene block copolymer.
Such a propylene-ethylene block copolymer is usually produced industrially using a Ziegler-Natta catalyst, but the Ziegler-Natta catalyst generally has various active sites (so-called multisite). ), The molecular weight distribution and the comonomer composition distribution of the propylene-ethylene copolymer part are known to be wide. Thus, the propylene-ethylene block copolymer produced using a Ziegler-Natta catalyst has a wide composition distribution, so the rigidity-impact resistance balance of the molded product is relatively good, and the molecular weight distribution. The moldability is also good because of the large width. As described above, the propylene-ethylene block copolymer produced using a Ziegler-Natta catalyst exhibits excellent performance in various physical property balances, and thus includes interior and exterior of automobiles and packaging materials. It has been used in many industrial fields.
However, from the viewpoint of recent resource problems, energy problems, etc., the demand for further thinning and weight reduction of materials is not limited, and impact resistance performance to propylene-ethylene block copolymers which are impact resistant materials. The expectation for improvement is getting stronger.

Until now, in order to improve the rigidity, heat resistance and impact resistance of such a propylene-ethylene block copolymer in a well-balanced manner, the copolymer component has a sufficient crystallinity while maintaining sufficient impact resistance. It is thought that it is necessary to control the compatibility of polypropylene and copolymer components within an appropriate range, and by adding a compatibilizer component of polypropylene component and copolymer part, a technique to increase these compatibility Has been known for a long time (see, for example, Patent Documents 1 and 2).
In such a method, recently, the intrinsic viscosity and MFR of each component are further specified, and a copolymer component having a relatively low ethylene content and a copolymer component having a relatively low ethylene content as a compatibilizing agent are combined with the crystalline polypropylene component. Copolymers composed of components and having excellent impact resistance at low temperatures are also disclosed (see, for example, Patent Documents 3 and 4).

  In order to improve the balance of rigidity, heat resistance and impact resistance of the propylene-ethylene block copolymer produced by a metallocene catalyst (so-called single site catalyst) which has been increasingly used recently, Similar to the method using a Ziegler catalyst, a propylene resin composition comprising a compatibilizer component of a metallocene propylene-ethylene copolymer and having an excellent balance of rigidity, heat resistance and impact resistance is prepared in at least three stages. Attempts to produce by polymerization have been made (see Patent Document 5).

Furthermore, the inventors of the present application have disclosed that a propylene-ethylene block produced by a metallocene catalyst comprising at least three components including a compatibilizing component with respect to a propylene-ethylene block copolymer produced by a Ziegler-Natta catalyst. A technique for improving rigidity and impact resistance by adding a copolymer as a modifier has been proposed (for example, Japanese Patent Application No. 2006-34573).
As described above, as a technique for improving the impact resistance of a propylene-ethylene block copolymer produced with a Ziegler-Natta catalyst, many are compatible with a crystalline propylene component and a propylene-ethylene random copolymer component. Many attentions are paid to improving the impact resistance by modifying the properties of the interface, but the interface is modified to improve the compatibility between the crystalline part and the amorphous part. Since this leads to a decrease in the rigidity, it is extremely difficult to improve the rigidity-impact resistance balance, and it can be said that there is still room for examination.
JP-A-57-67611 JP 61-152442 A JP 2003-327642 A JP 9-48831 A International Publication No. WO95 / 27741

  In view of the technical improvement flow of the propylene-based resin material in the prior art, development of a propylene-based resin material having a further improved balance of rigidity and impact resistance is strongly desired. In view of the above problems, an object is to provide a propylene-based resin composition in which the balance between rigidity and impact resistance is improved, and particularly, impact resistance is remarkably improved.

  In order to solve the above-mentioned problems, the present inventors have conducted intensive research, and as a result, in improving the impact resistance of a propylene-ethylene block copolymer produced with a Ziegler-Natta catalyst, the Ziegler-Natta system The main component is a propylene-ethylene copolymer component produced by a multistage polymerization method using a catalyst, and a crystalline propylene component and a part of the propylene-ethylene random copolymer component are produced sequentially by a multistage polymerization method. A propylene-based resin composition containing a propylene-ethylene copolymer component comprising a crystalline propylene polymer component and a propylene-ethylene random copolymer component, which contains a bonded copolymer, as an impact resistance improver; Surprisingly, it has been found that the shock resistance is remarkably improved while the rigidity is substantially the same. Chi, can solve the above problems, based on these findings, the present invention has been completed.

That is, according to the first invention of the present invention, 50.0 to 99.9% by weight of propylene-ethylene copolymer component (Z) and 0.1 to 50.0% by weight of propylene-ethylene copolymer. A resin composition comprising a coalescence component (M), wherein the propylene-ethylene copolymer component (Z) is a crystalline propylene polymer component and a propylene-ethylene random copolymer component using a Ziegler-Natta catalyst. Obtained by sequential production by a multistage polymerization method and having the following property (Z1), the propylene-ethylene copolymer component (M) is composed of a crystalline propylene polymer component and a propylene-ethylene random copolymer. It is obtained by sequentially producing a polymer component by a multistage polymerization method, and comprises a crystalline component (A) insoluble in 25 ° C. paraxylene and an amorphous component (B) dissolved in 25 ° C. paraxylene. It contains a copolymer in which the crystalline propylene polymer component and the propylene-ethylene random copolymer component are chemically bonded, and has the following characteristics (A1), (B1) and (B2) A resin composition is provided.
(Z1): The component (CXS-Z) of component (Z) dissolved in 25 ° C. paraxylene is 5 to 50% by weight based on the total amount of component (Z), and the component insoluble in 25 ° C. paraxylene (CXIS -Z) amount is 50 to 95% by weight relative to the total amount of component (Z).
(A1): The amount of component (A) is 20 to 95% by weight based on the total amount of component (M).
(B1): The amount of component (B) is 5 to 80% by weight based on the total amount of component (M).
(B2): The ethylene content of component (B) is 40% by weight or more and less than 60% by weight.

According to a second aspect of the present invention, in the first aspect, the chemical bond mode of the crystalline propylene polymer component and the propylene-ethylene random copolymer component of the component (M) is propylene-ethylene random copolymer. A resin composition is provided in which the coalescing component is a main chain and the crystalline propylene polymer component is a side chain.
According to the third invention of the present invention, in the first or second invention, the strain hardening degree (λmax) in the measurement of the extension viscosity of the component (M) is 2.0 or more. A composition is provided.
Furthermore, according to a fourth invention of the present invention, in the first invention, the content of the component (B) is 0.2 to 10% by weight based on the total amount of the composition. A composition is provided.

According to the fifth aspect of the present invention, 50.0 to 99.9% by weight of propylene-ethylene copolymer component (Z) and 0.1 to 50.0% by weight of propylene-ethylene copolymer A resin composition comprising a coalescence component (M), wherein the propylene-ethylene copolymer component (Z) is a crystalline propylene polymer component and a propylene-ethylene random copolymer component using a Ziegler-Natta catalyst. Is obtained by sequential production by a multistage polymerization method and has the following property (Z1), and the propylene-ethylene copolymer component (M) is produced sequentially by a multistage polymerization method at 25 ° C. A crystalline propylene polymer component (A) that is insoluble in paraxylene and satisfies the following properties (A1) to (A4), and a non-soluble material that dissolves in 25 ° C. paraxylene and satisfies the following properties (B1) to (B4) Crystalline propile - it from ethylene random copolymer component (B), and the following (M1) ~ resin composition characterized by satisfying the characteristics of (M3) is provided.
(Z1): The component (CXS-Z) of component (Z) dissolved in 25 ° C. paraxylene is 5 to 50% by weight based on the total amount of component (Z), and the component insoluble in 25 ° C. paraxylene (CXIS -Z) amount is 50 to 95% by weight relative to the total amount of component (Z).
(M1): The weight average molecular weight (Mw) measured by GPC of a component (M) is 100,000-1 million.
(M2): The amount of the component (M) insoluble in hot paraxylene is 0.3% by weight or less based on the total amount of the component (M).
(M3): The strain hardening degree (λmax) in the measurement of the extensional viscosity of the component (M) is 2.0 or more.
(A1): The amount of component (A) is 20 to 95% by weight based on the total amount of component (M).
(A2): The weight average molecular weight (Mw) measured by GPC of a component (A) is 100,000-1 million.
(A3): Isotactic triad fraction (mm) measured by ¹³ C-NMR of component (A) is 93% or more.
(A4): The strain hardening degree (λmax) in the measurement of the extensional viscosity of the component (A) is 2.0 or more.
(B1): The amount of component (B) is 5 to 80% by weight based on the total amount of component (M).
(B2): The ethylene content of the component (B) is 10% by weight or more and less than 40% by weight.
(B3): The weight average molecular weight (Mw) measured by GPC of a component (B) is 100,000-1 million.
(B4): The strain hardening degree (λmax) in the measurement of the extensional viscosity of the component (B) is 2.0 or more.

According to a sixth aspect of the present invention, in the fifth aspect, the content of the component (B) is 0.2 to 10% by weight based on the total amount of the composition. A composition is provided.
Furthermore, according to the seventh invention of the present invention, in the first or fifth invention, the component (M) is composed of the following catalyst components (a), (b) and (c):
(I) first step of polymerizing propylene alone, or propylene and ethylene or α-olefin, and polymerizing ethylene or α-olefin with respect to all monomer components in an amount of 0 to 10% by weight; and (ii) propylene and ethylene Or a second step in which α-olefin is polymerized and ethylene or α-olefin is polymerized in an amount of 10 to 90% by weight based on the total monomer components;
A resin composition is provided which is manufactured by the method described above.
(A): Metallocene compound represented by the general formula (1)

[In General Formula (1), each of R ¹¹ and R ¹² independently represents hydrogen, an alkyl group having 1 to 6 carbon atoms, a halogen-containing alkyl group having 1 to 6 carbon atoms, or silicon containing 1 to 6 carbon atoms. Represents an alkyl group, an aryl group having 6 to 16 carbon atoms, a halogen-containing aryl group having 6 to 16 carbon atoms, a nitrogen or oxygen having 4 to 16 carbon atoms, and a heterocyclic group containing sulfur, and at least one of R ¹¹ and R ¹² One shows a heterocyclic group containing nitrogen, oxygen or sulfur having 4 to 16 carbon atoms. Each of R ¹³ and R ¹⁴ is independently an alkyl group having 1 to 6 carbon atoms, a halogen-containing alkyl group having 1 to 6 carbon atoms, a silicon-containing alkyl group having 1 to 6 carbon atoms, or 6 to 16 carbon atoms. An aryl group of 6 to 16 carbon atoms, a halogen-containing aryl group having 6 to 16 carbon atoms, a silicon-containing aryl group having 6 to 16 carbon atoms, a nitrogen or oxygen having 6 to 16 carbon atoms, and a heterocyclic group containing sulfur. X ¹¹ and Y ¹¹ are each independently a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms, a silicon-containing hydrocarbon group having 1 to 20 carbon atoms, or a halogenated group having 1 to 20 carbon atoms. Represents a hydrocarbon group, an oxygen-containing hydrocarbon group having 1 to 20 carbon atoms, an amino group, or a nitrogen-containing hydrocarbon group having 1 to 20 carbon atoms, Q ¹¹ is a divalent hydrocarbon group having 1 to 20 carbon atoms, It represents a silylene group, an oligosilylene group, or a germylene group which may have a hydrocarbon group having 1 to 20 carbon atoms. ]
(B): Ion exchange layered silicate (c): Organoaluminum compound

Further, according to the eighth invention of the present invention, 0 to 70 parts by weight of an ethylene / α-olefin elastomer or a styrene elastomer and inorganic with respect to 100 parts by weight of the resin composition according to the first or fifth invention. A resin composition containing 0 to 70 parts by weight of a filler is provided.
Furthermore, according to the ninth aspect of the present invention, it is obtained by sequentially producing a crystalline propylene polymer component and a propylene-ethylene random copolymer component by a multistage polymerization method using a Ziegler-Natta catalyst. Further, there is provided a method of using the propylene-ethylene copolymer (M) according to the first or fifth invention as an impact resistance improving material for a propylene-ethylene copolymer.

  The resin composition of the present invention has a remarkable effect that, with the above-described configuration, the impact resistance is remarkably improved while the rigidity is substantially the same, and the balance between rigidity and impact resistance is excellent. In addition, because of their excellent characteristics, it is suitable for injection molding, sheet molding, extrusion foam molding, large blow molding, etc., especially for interior and exterior materials of vehicles such as automobiles and packaging packaging materials such as electrical products. Can do.

The resin composition of the present invention was obtained by sequentially producing a crystalline propylene polymer component and a propylene-ethylene random copolymer component by a multistage polymerization method using a Ziegler-Natta catalyst as a main component. Propylene-ethylene copolymer (component (Z)) 50.0 to 99.9 wt% and, as an improving material, one of a crystalline propylene component and a propylene-ethylene random copolymer component, which are sequentially produced by a multistage polymerization method A propylene-ethylene copolymer (component (M)) comprising a crystalline propylene polymer component (A) and a propylene-ethylene random copolymer component (B), including a copolymer in which parts are chemically bonded It consists of 0.1 to 50.0 wt%.
Details will be described below.

1. Propylene-ethylene copolymer (component (Z))
The component (Z), which is the main component of the resin composition of the present invention, is a sequential propylene polymer component and a propylene-ethylene random copolymer component obtained by a multistage polymerization method using a conventionally known Ziegler-Natta catalyst. Propylene-ethylene copolymer obtained by manufacturing the same, which is called a propylene-ethylene block copolymer by those skilled in the art, but in practice, the crystalline propylene polymer component and propylene- It is understood that there is substantially no chemical bond between the ethylene random copolymer.

The component (Z) is produced by a slurry polymerization method, a gas phase polymerization method, or a liquid phase bulk polymerization method using a Ziegler-based highly stereoregular catalyst. It is preferable to produce by a phase polymerization method. As a polymerization method, either batch polymerization or continuous polymerization can be adopted, but it is preferable to produce by polymerization.
In producing this component (Z), first, a crystalline propylene homopolymer part is formed by homopolymerization of propylene, and then an ethylene / propylene random copolymer part is formed by random copolymerization of propylene and ethylene. However, if necessary, an α-olefin other than 3 carbon atoms such as ethylene and butene may be copolymerized as a comonomer within a range of several percent during the initial polymerization.

Specific production methods include a titanium trichloride catalyst composed of titanium trichloride and organoaluminum halide, a solid catalyst component essentially containing magnesium chloride, titanium halide, and an electron-donating compound, organoaluminum, and organosilicon. A method using a magnesium-supported catalyst composed of a compound, or a catalyst obtained by combining an organoaluminum compound component with an organosilicon treatment solid catalyst component formed by contacting an organoaluminum and an organosilicon compound as a solid catalyst component, It can be produced by homopolymerization and then random copolymerization of propylene and ethylene.
In addition, the propylene / ethylene block copolymer can be used within the range that does not significantly impair the essence of the present invention. It may be a ternary or higher copolymer containing an unsaturated organic acid such as an acid or a derivative thereof, or a mixture thereof.

2. Propylene-ethylene copolymer (component (M))
In the resin composition of the present invention, the component (M) used as a modifier is a copolymer in which a crystalline propylene polymer component and a part of a propylene-ethylene random copolymer component are chemically bonded. A propylene-ethylene copolymer component obtained by sequentially producing a crystalline propylene polymer component and a propylene-ethylene random copolymer component by a multistage polymerization method.

The multistage polymerization is preferably a two-stage polymerization in which the crystalline propylene polymer component is polymerized in the first stage and the propylene-ethylene random copolymer component is polymerized in the second stage.
At this time, a part of the crystalline propylene polymer produced in the first step is present in a state in which a part of the reaction is terminated in the state of the terminal vinyl group, so that when the second-stage polymerization is performed as it is, the terminal vinyl is As a macromonomer, a crystalline propylene polymer is involved in the second stage polymerization, and a graft copolymer is produced in which the propylene-ethylene random copolymer component is the main chain and the crystalline propylene polymer component is the side chain. To do.
The present inventors consider that the factor that the resin composition of the present invention exhibits good impact resistance can be attributed to the presence of this graft copolymer. In general, a polymer having a part composed of a chain of different monomers in one molecule, such as a real block copolymer or a graft copolymer, is a molecule that is considerably smaller than an ordinary phase separation structure, called a microphase separation structure. It is known to take a phase separation structure on the order of level, and such a fine phase separation structure significantly improves impact resistance. Actually, in the electron micrograph of the component (M) according to the present invention (having a graft copolymer), a very fine rubber domain is obtained as compared with a normal resin composition (having no graft copolymer). This disperse structure is seen and supports the above inference.
In addition, as a crystalline propylene polymer component of the component (M), a propylene homopolymer is most preferably used, but a small amount of other unsaturated compounds, for example, 1 as long as the essence of the present invention is not impaired. -Copolymers such as α-olefins such as butene, vinyl esters such as vinyl acetate, unsaturated organic acids such as maleic anhydride or derivatives thereof, and the propylene-ethylene random copolymer component may be It contains other unsaturated compounds, for example, α-olefins such as 1-butene, vinyl esters such as vinyl acetate, unsaturated organic acids such as maleic anhydride, or derivatives thereof, etc. within a range that does not significantly impair the essence of the invention. A ternary or higher copolymer may be used, or a mixture thereof.

One of the methods for determining whether or not a graft copolymer in which the propylene-ethylene random copolymer component is a main chain and the crystalline propylene polymer component is a side chain is as follows: It is effective to use the strain hardening degree (λmax) obtained from the measurement of the viscosity.
The strain hardening degree (λmax) is an index representing the strength at the time of melting, and when this value is large, there is an effect of improving the melt tension.
The degree of strain hardening is an index representing the nonlinearity of elongational viscosity, and it is usually said that this value increases as the molecular entanglement increases. Molecular entanglement is affected by the amount of branching and the length of the branched chain. Therefore, the greater the amount of branching and the length of branching, the greater the degree of strain hardening.
In the component (M) of the present invention, when the first-stage crystalline propylene polymer is produced, the propylene polymer having a terminal vinyl group is involved in the polymerization as a macromonomer to produce a branched propylene polymer. Therefore, this degree of strain hardening is an index of the amount of terminal vinyl propylene polymer produced, and is preferably 2.0 or more.
Here, regarding the method for measuring the strain hardening degree, the same value can be obtained in principle by any method as long as the uniaxial elongation viscosity can be measured. Although there are methods described in (2001) 8663, examples of preferable measuring methods and measuring instruments include the following.

Measuring method 1:
Apparatus: Ales manufactured by Rheometrics
Jig: EXTENSIONAL VISUALITY FIXTURE, manufactured by TA Instruments
Measurement temperature: 180 ° C
Strain rate: 0.1 / sec
Preparation of test piece: A sheet of 18 mm × 10 mm and a thickness of 0.7 mm is formed by press molding.

Measurement method 2:
Apparatus: Toyo Seiki Co., Ltd., Melten Rheometer
Measurement temperature: 180 ° C
Strain rate: 0.1 / sec
Preparation of test piece: Extruded strands are prepared at a speed of 10 to 50 mm / min using an orifice with an inner diameter of 3 mm at 180 ° C. using a Capillograph manufactured by Toyo Seiki Co., Ltd.

Calculation method:
The elongational viscosity at a strain rate of 0.1 / sec is plotted as a log-log graph of time t (second) on the horizontal axis and elongational viscosity ηE (Pa · second) on the vertical axis. On the logarithmic graph, the viscosity immediately before strain hardening is approximated by a straight line, the maximum value (ηmax) of the extensional viscosity ηE until the amount of strain becomes 4.0 is obtained, and on the approximate straight line up to that time Let ηlin be the viscosity.
FIG. 2 is an example of a plot of elongational viscosity. ηmax / ηlin is defined as λmax and is used as an index of strain hardening degree.
The elongational viscosity and strain hardening degree calculated from the measuring method 1 and the measuring method 2 are, in principle, for measuring the inherent extensional viscosity and strain hardening degree of the substance and exhibit the same value. Therefore, either measurement method 1 or measurement method 2 may be used.

However, the measurement method 2 has a measurement restriction that a measurement sample hangs down when the molecular weight is relatively low (that is, when MFR> 2), and the measurement accuracy is lowered. In measurement method 1, when measuring a relatively high molecular weight (MFR <1), the measurement sample is deformed in a non-uniform manner, and distortion occurs at the time of measurement. There is a problem of measurement accuracy that is averaged and the strain hardening degree is estimated to be small.
Therefore, it is preferable for convenience to use the measuring method 1 for those having a low molecular weight and the measuring method 2 for those having a high molecular weight.
Generally, in order to show a high degree of strain hardening, it is said that the branching length is preferably higher than the molecular weight of entanglement of polypropylene. The weight average molecular weight (Mw) is 15,000 or more, preferably 30,000 or more, and more preferably 50,000 or more.

The resin composition of the present invention is a composition comprising the component (Z) and the component (M) having such characteristics, and the composition range of each component is as follows.
The amount ratio of the crystalline propylene polymer component of component (Z) and the propylene-ethylene random copolymer component (amorphous component) can be determined from the material balance at the time of polymerization, but analytically As shown below, it can be quantified by separating the crystalline component and the amorphous component by para-xylene.
The amount of the component (Z) dissolved in xylene at 25 ° C. (CXS-Z), that is, the amount of the propylene-ethylene random copolymer component is 5 to 50% by weight with respect to the total amount of the component (Z), The amount of the component insoluble in xylene (CXIS-Z), that is, the amount of the crystalline propylene polymer component is required to be 50 to 95% by weight from the viewpoint of the balance between rigidity and impact resistance.

Similarly, the component (M) is separated into a crystalline component and an amorphous component, and the amount of the component (B) dissolved in paraxylene at 25 ° C. is 5 to 80% by weight based on the total amount of (M). The component (A) insoluble in paraxylene is 20 to 95% by weight.
And about the quantity ratio of a component (Z) and a component (M), it mix | blends so that the quantity of the component (B) with respect to the whole composition may be 0.2-10 wt%-the rigidity of a composition- It is preferable from the viewpoint of balance of impact resistance.
Further, the ethylene content of the component (B) dissolved in paraxylene at 25 ° C. needs to be 10% by weight or more and less than 40% by weight. When the component (M) is used as an impact modifier, it is considered most efficient to localize it at the interface between the crystalline component and the amorphous component of the component (Z). Therefore, the ethylene content of component (B), which is an amorphous component of component (M), must have some compatibility with both the homo PP and the rubber component of component (Z). As for it, it is necessary for it to be comparatively low 10 weight% or more and less than 40 weight%.
Here, a specific method for separating the crystalline component and the amorphous component is as follows.

Sorting method:
2 g of the sample was dissolved in 300 ml of p-xylene (0.5 mg / ml BHT: 2,6-di-tert-butyl-4-methylphenol) at 130 ° C. to obtain a solution, and then at 25 ° C. Leave for 48 hours. Thereafter, it is separated into a precipitated polymer and a filtrate. The p-xylene is evaporated from the filtrate and further dried under reduced pressure at 100 ° C. for 12 hours, and the component (CXS) dissolved in xylene at 25 ° C. is recovered. In addition, the precipitated polymer similarly removes the remaining p-xylene sufficiently, and becomes a component insoluble in xylene (CXIS) at 25 ° C.

The component (Z) preferably has a melt flow rate (230 ° C., 2.16 kg load) of 15 to 200 g / 10 minutes. Those outside this range are difficult to use in the field of injection molding, which is the main application of impact resistant polypropylene.
In addition, the ethylene content (value relative to the propylene-ethylene random copolymer) in the propylene-ethylene random copolymer component in the component (Z) is 10 to 70% by weight from the viewpoint of improving impact resistance at low temperatures. Is preferably used.

As described above, the component (M) is composed of a crystalline component (A) and an amorphous component (B), and a part of each component is mainly a propylene-ethylene random copolymer component. Analytical analysis of the following properties (M1) to (M3), (A1) to (A4), (B1) includes a graft copolymer that is a chain and the crystalline propylene polymer component is a side chain. ) To (B4).
(M1): The weight average molecular weight (Mw) measured by GPC of a component (M) is 100,000-1 million.
(M2): The amount of the component (M) insoluble in hot paraxylene is 0.3% by weight or less based on the total amount of the component (M).
(M3): The strain hardening degree (λmax) in the measurement of the extensional viscosity of the component (M) is 2.0 or more.
(A1): The amount of component (A) is 20 to 95% by weight based on the total amount of component (M).
(A2): The weight average molecular weight (Mw) measured by GPC of a component (A) is 100,000-1 million.
(A3): Isotactic triad fraction (mm) measured by ¹³ C-NMR of component (A) is 93% or more.
(A4): The strain hardening degree (λmax) in the measurement of the extensional viscosity of the component (A) is 2.0 or more.
(B1): The amount of component (B) is 5 to 80% by weight based on the total amount of component (M).
(B2): The ethylene content of the component (B) is 10% by weight or more and less than 40% by weight.
(B3): The weight average molecular weight (Mw) measured by GPC of a component (B) is 100,000-1 million.
(B4): The strain hardening degree (λmax) in the measurement of the extensional viscosity of the component (B) is 2.0 or more.

Hereinafter, each item will be described sequentially.
(M1): The weight average molecular weight (Mw) measured by GPC of a component (M) is 100,000-1 million.
As the component (M), those having a weight average molecular weight in the range of 100,000 to 1,000,000 are used.
The weight average molecular weight (Mw) is measured by a GPC measuring apparatus and conditions described later, and it is necessary that the Mw of the component (M) is in the range of 100,000 to 1,000,000. When this Mw is smaller than 100,000, the melt processability is inferior and the mechanical strength is insufficient. On the other hand, when Mw exceeds 1 million, the melt viscosity is high and the melt processability is lowered. From the balance of melt processability and mechanical strength, it is in the above range, preferably Mw is 150,000 to 900,000, more preferably 200,000 to 800,000.
The value of the weight average molecular weight (Mw) is obtained by gel permeation chromatography (GPC), and the details of the measuring method and measuring instrument are as follows.

Equipment: GPC manufactured by Waters (ALC / GPC, 150C)
Detector: MIRAN, 1A, IR detector manufactured by FOXBORO (measurement wavelength: 3.42 μm)
Column: AD806M / S (3 pieces) manufactured by Showa Denko KK
Mobile phase solvent: o-dichlorobenzene (ODCB)
Measurement temperature: 140 ° C
Flow rate: 1.0 ml / min Injection volume: 0.2 ml

The sample is prepared by preparing a 1 mg / mL solution using ODCB (containing 0.5 mg / mL BHT) and dissolving it at 140 ° C. for about 1 hour. The baseline and section of the obtained chromatogram are performed as shown in FIG. Further, the conversion from the retention capacity obtained by GPC measurement to the molecular weight is performed using a standard curve prepared in advance by standard polystyrene. The standard polystyrenes used are all the following brands manufactured by Tosoh Corporation.
Brand: F380, F288, F128, F80, F40, F20, F10, F4, F1, A5000, A2500, A1000
Inject 0.2 mL of a solution dissolved in ODCB (containing 0.5 mg / mL BHT) so that each is 0.5 mg / mL to create a calibration curve. The calibration curve uses a cubic equation obtained by approximation by the least square method. The following numerical value is used for the viscosity formula: [η] = K × Mα used for conversion to molecular weight.
PS: K = 1.38 × 10 −4, α = 0.7
PP: K = 1.03 × 10−4, α = 0.78

(M2): The amount of the component (M) insoluble in hot paraxylene is 0.3% by weight or less based on the total amount of (M).
In the present invention, the component insoluble in hot p-xylene needs to be 0.3% by weight or less. A method for measuring a component insoluble in hot p-xylene is as follows.
A glass separable flask equipped with a stirrer is charged with 500 mg of a polymer in a bowl made of stainless steel 400 mesh (wire diameter 0.03 μm, aperture 0.034 mm, space ratio 27.8%). Fixed to. 700 ml of p-xylene containing 1 g of an antioxidant (BHT: 2,6-di-t-butyl-4-methylphenol) was added, and the polymer was dissolved while stirring at a temperature of 140 ° C. for 2 hours.
The soot containing the p-xylene insoluble part was collected, sufficiently dried and weighed to obtain the paraxylene insoluble part. The gel fraction (wt%) defined as the p-xylene insoluble part was calculated by the following formula.
Gel fraction = [(residual amount in mesh g) / (prepared sample amount g)] × 100

Further, in order to have a small amount of gel or no gel as described above, it is important that there are no components having a very high molecular weight. Therefore, when the molecular weight distribution is measured by GPC, it is important that the molecular weight distribution does not spread to the high molecular weight side.
Therefore, the Q value (the ratio of the weight average molecular weight (Mw) to the number average molecular weight (Mn)) measured by GPC is preferably 7 or less, more preferably 6 or less, and still more preferably 5 or less.
Moreover, in order not to extend extremely to the high molecular weight side, it is necessary that the molecular weight M (90) at which the integrated value in the curve is 90% by GPC is 2,000,000 or less.
Here, M (90) is a molecular weight at which the integral value in the curve is 90% by GPC measured by the GPC measuring apparatus and conditions described above, and in the present invention, M (90) is 2,000,000 or less. It is a feature. When M (90) exceeds 2,000,000, the high molecular weight component is excessively increased, and a gel is generated or melt processability is deteriorated. Therefore, M (90) is 2,000,000 or less, preferably 1,500,000 or less, and more preferably 1,000,000.

(M3): The strain hardening degree (λmax) in the measurement of the extensional viscosity of the component (M) is 2.0 or more.
The physical significance of the strain hardening degree is as described above.

(A1): The amount of component (A) is 20 wt% to 95 wt% with respect to the total amount of (M).
This rule is the range of the component (A) with respect to the total amount of (M), and this range is used from the balance of rigidity and impact resistance.

(A2): The weight average molecular weight (Mw) measured by GPC of a component (A) is 100,000-1 million.
Here, the weight average molecular weight (Mw) is measured by the GPC measuring apparatus and conditions described above, and the crystalline component (A) in the component (M) has a weight average molecular weight of 100,000 to 1,000,000. Ranges are used.
When this Mw is smaller than 100,000, the melt processability is inferior and the mechanical strength is insufficient. On the other hand, when Mw exceeds 1 million, the melt viscosity is high and the melt processability is lowered. From the balance of melt processability and mechanical strength, it is in the above range, preferably Mw is 150,000 to 900,000, more preferably 200,000 to 800,000.

(A3): Isotactic triad fraction (mm) measured by ¹³ C-NMR of component (A) is 93% or more.
The crystalline component (A) of the propylene-ethylene copolymer (component (M)) according to the present invention has a stereoregularity in which the mm fraction of propylene units 3 chain obtained by ¹³ C-NMR is 93% or more. Is.
The mm fraction is the ratio of three propylene unit chains in which the direction of methyl branching in each propylene unit is the same among arbitrary three propylene unit chains composed of head-to-tail bonds in the polymer chain. This mm fraction is a value indicating that the three-dimensional structure of the methyl group in the polypropylene molecular chain is controlled isotactically, and the higher the value, the higher the degree of control. When the mm fraction of the crystalline component (A) is smaller than this value, the mechanical properties such as the elastic modulus of the product are lowered. Accordingly, the mm fraction is preferably 95% or more, and more preferably 96% or more.

The detail of the measuring method of mm fraction of the propylene unit 3 chain | strand by ¹³ C-NMR is as follows.
A sample of 375 mg was completely dissolved in 2.5 ml of deuterated 1,1,2,2, -tetrachloroethane in an NMR sample tube (10φ), and then measured at 125 ° C. by a proton complete decoupling method. The chemical shift was set to 74.2 ppm in the middle of the three peaks of deuterated 1,1,2,2-tetrachloroethane. The chemical shifts of other carbon peaks are based on this.
Flip angle: 90 degrees Pulse interval: 10 seconds Resonance frequency: 100 MHz or more Integration frequency: 10,000 times or more Observation range: -20 ppm to 179 ppm

The mm fraction is measured using a ¹³ C-NMR spectrum measured under the above conditions.
Spectral assignment is carried out according to the method described in detail in Japanese Patent Application No. 2006-311249, with reference to Macromolecules, (1975) 8 pp. 687 and Polymer, Vol. 30, p. 1350 (1989). .

(A4): The strain hardening degree (λmax) in the measurement of the extensional viscosity of the component (A) is 2.0 or more.
The strain hardening degree (λmax) is an index representing the nonlinearity of elongational viscosity, and it is usually said that this value increases as the molecular entanglement increases. Molecular entanglement is affected by the amount of branching and the length of the branched chain. Therefore, the greater the amount of branching and the length of branching, the greater the degree of strain hardening.
Therefore, this degree of strain hardening is an index of the amount of the graft copolymer produced and is 2.0 or more. The method for measuring the extensional viscosity and the method for determining λmax are as described above.

(B1): The amount of component (B) is 5 to 80% by weight based on the total amount of component (M).
This rule is the range of the component (B) with respect to the total amount of (M), and this range is used from the balance of rigidity and impact resistance.

(B2): The ethylene content of component (B) is 10% by weight or more and less than 40% by weight.
The ethylene content in the component (B) is preferably 10% by weight or more and less than 40% by weight from the viewpoint of improving impact resistance at low temperatures. The ethylene content can be evaluated by measuring the infrared absorption spectrum of the component (B) fractionated by paraxylene.

(B3): The weight average molecular weight (Mw) measured by GPC of a component (B) is 100,000-1 million.
Here, the weight average molecular weight (Mw) is measured by the GPC measuring apparatus and conditions described above, and the amorphous component (B) in the component (M) has a weight average molecular weight of 100,000 to 1,000,000. The thing of the range of is used.
When this Mw is smaller than 100,000, the melt processability is inferior and the mechanical strength is insufficient. On the other hand, when Mw exceeds 1 million, the melt viscosity is high and the melt processability is lowered. From the balance of melt processability and mechanical strength, it is in the above range, preferably Mw is 150,000 to 900,000, more preferably 200,000 to 800,000.

(B4): The strain hardening degree (λmax) in the measurement of the extensional viscosity of the component (B) is 2.0 or more.
The strain hardening degree (λmax) is an index representing the nonlinearity of elongational viscosity, and it is usually said that this value increases as the molecular entanglement increases. Molecular entanglement is affected by the amount of branching and the length of the branched chain. Therefore, the greater the amount of branching and the length of branching, the greater the degree of strain hardening.
Therefore, this degree of strain hardening is an index of the amount of the graft copolymer produced and is 2.0 or more. The method for measuring the extensional viscosity and the method for determining λmax are as described above.

3. Production Method of Propylene-Ethylene Copolymer (Component (M)) Regarding the method for producing the component (M) according to the present invention, any method can be used as long as a propylene-ethylene copolymer satisfying the various characteristics described above can be obtained. Well, there is no particular limitation, using a polymerization catalyst obtained by contacting the following catalyst components (a), (b) and (c),
(I) first step of polymerizing propylene alone, or propylene and ethylene or α-olefin, and polymerizing ethylene or α-olefin with respect to all monomer components in an amount of 0 to 10% by weight; and (ii) propylene and ethylene Alternatively, a propylene-ethylene copolymer (component (M)) according to the present invention is produced by a step having a second step of polymerizing α-olefin and polymerizing 10 to 70% by weight of ethylene with respect to all monomer components. It can be manufactured with good performance.

(1) Component (a):
The catalyst component (a) used in the present invention is a metallocene compound having hafnium as a central metal represented by the following general formula (1).

[In General Formula (1), each of R ¹¹ and R ¹² independently represents hydrogen, an alkyl group having 1 to 6 carbon atoms, a halogen-containing alkyl group having 1 to 6 carbon atoms, or silicon containing 1 to 6 carbon atoms. Represents an alkyl group, an aryl group having 6 to 16 carbon atoms, a halogen-containing aryl group having 6 to 16 carbon atoms, a nitrogen or oxygen having 4 to 16 carbon atoms, and a heterocyclic group containing sulfur, and at least one of R ¹¹ and R ¹² One shows a heterocyclic group containing nitrogen, oxygen or sulfur having 4 to 16 carbon atoms. Each of R ¹³ and R ¹⁴ is independently an alkyl group having 1 to 6 carbon atoms, a halogen-containing alkyl group having 1 to 6 carbon atoms, a silicon-containing alkyl group having 1 to 6 carbon atoms, or 6 to 16 carbon atoms. An aryl group of 6 to 16 carbon atoms, a halogen-containing aryl group having 6 to 16 carbon atoms, a silicon-containing aryl group having 6 to 16 carbon atoms, a nitrogen or oxygen having 6 to 16 carbon atoms, and a heterocyclic group containing sulfur. X ¹¹ and Y ¹¹ are each independently a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms, a silicon-containing hydrocarbon group having 1 to 20 carbon atoms, or a halogenated group having 1 to 20 carbon atoms. Represents a hydrocarbon group, an oxygen-containing hydrocarbon group having 1 to 20 carbon atoms, an amino group, or a nitrogen-containing hydrocarbon group having 1 to 20 carbon atoms, Q ¹¹ is a divalent hydrocarbon group having 1 to 20 carbon atoms, It represents a silylene group, an oligosilylene group, or a germylene group which may have a hydrocarbon group having 1 to 20 carbon atoms. ]

The heterocyclic group containing nitrogen, oxygen or sulfur having 4 to 16 carbon atoms of R ¹¹ and R ¹² is preferably a 2-furyl group, a substituted 2-furyl group, a substituted 2-thienyl group, or a substituted group. 2-furfuryl group, more preferably a substituted 2-furyl group.
Moreover, as a substituted 2-furyl group, a substituted 2-thienyl group, and a substituted 2-furfuryl group, an alkyl group having 1 to 6 carbon atoms such as a methyl group, an ethyl group, and a propyl group, Examples thereof include halogen atoms such as fluorine atom and chlorine atom, alkoxy groups having 1 to 6 carbon atoms such as methoxy group and ethoxy group, and trialkylsilyl groups. Of these, a methyl group and a trimethylsilyl group are preferable, and a methyl group is particularly preferable.
Further, R ¹¹ and R ¹² are particularly preferably a 2- (5-methyl) -furyl group. R ¹¹ and R ¹² are preferably the same as each other.

R ¹³ and R ¹⁴ are preferably an aryl group having 6 to 16 carbon atoms, a halogen-containing aryl group having 6 to 16 carbon atoms, or a silicon-containing aryl group having 6 to 16 carbon atoms. In the range of 6 to 16, one or more hydrocarbon groups having 1 to 6 carbon atoms, silicon-containing hydrocarbon groups having 1 to 6 carbon atoms, halogen-containing carbon atoms having 1 to 6 carbon atoms on the aryl cyclic skeleton You may have a hydrogen group as a substituent.
At least one of R ¹³ and R ¹⁴ is preferably a phenyl group, a 4-tbutylphenyl group, a 2,3-dimethylphenyl group, a 3,5-ditbutylphenyl group, a 4-phenyl-phenyl group, or a chlorophenyl. Group, a naphthyl group, or a phenanthryl group, and more preferably a phenyl group, a 4-tbutylphenyl group, and a 4-chlorophenyl group. Moreover, the case where two R < ₂ > is mutually the same is preferable.

In General Formula (1), X ¹¹ and Y ¹¹ are each independently a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms, a halogenated hydrocarbon group having 1 to 20 carbon atoms, or 1 carbon atom. ˜20 silicon-containing hydrocarbon group, C 1-20 oxygen-containing hydrocarbon group, amino group, or C 1-20 nitrogen-containing hydrocarbon group. As said halogen atom, a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom are mentioned.
Specific examples of the hydrocarbon group having 1 to 20 carbon atoms include alkyl groups such as methyl, ethyl, n-propyl, i-propyl, n-butyl, i-butyl, and s-butyl, vinyl, propenyl, Examples include alkenyl groups such as cyclohexenyl, arylalkyl groups such as benzyl, arylalkenyl groups such as trans-styryl, and aryl groups such as phenyl, tolyl, 1-naphthyl, and 2-naphthyl.
Specific examples of the oxygen-containing hydrocarbon group having 1 to 20 carbon atoms include alkoxy groups such as methoxy, ethoxy, propoxy and butoxy, allyloxy groups such as phenoxy and naphthoxy, arylalkoxy groups such as phenylmethoxy, and furyl groups. And oxygen-containing heterocyclic groups.
Specific examples of the nitrogen-containing hydrocarbon group having 1 to 20 carbon atoms include alkylamino groups such as methylamino, dimethylamino, ethylamino and diethylamino, arylamino groups such as phenylamino and diphenylamino, (methyl) ( (Alkyl) (aryl) amino groups such as phenyl) amino, and nitrogen-containing heterocyclic groups such as pyrazolyl and indolyl.

In the halogenated hydrocarbon group having 1 to 20 carbon atoms, examples of the halogen atom include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom. The halogenated hydrocarbon group is a compound in which, when the halogen atom is, for example, a fluorine atom, the fluorine atom is substituted at an arbitrary position of the hydrocarbon group. Specific examples include fluoromethyl, difluoromethyl, trifluoromethyl, chloromethyl, dichloromethyl, and trichloromethyl groups.
Specific examples of the silicon-containing hydrocarbon group having 1 to 20 carbon atoms include trialkylsilylmethyl groups such as trimethylsilylmethyl and triethylsilylmethyl, dialkyl such as dimethylphenylsilylmethyl, diethylphenylsilylmethyl, and dimethyltolylsilylmethyl. (Alkyl) (aryl) silylmethyl group and the like can be mentioned.

In the general formula (1), Q ¹¹ couples the two five-membered ring, a divalent hydrocarbon group having 1 to 20 carbon atoms, which may have a hydrocarbon group having 1 to 20 carbon atoms silylene A group, an oligosilylene group or a germylene group. When two hydrocarbon groups are present on the above-mentioned silylene group, oligosilylene group or germylene group, they may be bonded to each other to form a ring structure.
Specific examples of Q ¹¹ include alkylene groups such as methylene, methylmethylene, dimethylmethylene and 1,2-ethylene; arylalkylene groups such as diphenylmethylene; silylene groups; methylsilylene, dimethylsilylene, diethylsilylene, di Alkylsilylene groups such as (n-propyl) silylene, di (i-propyl) silylene, di (cyclohexyl) silylene, (alkyl) (aryl) silylene groups such as methyl (phenyl) silylene; arylsilylene groups such as diphenylsilylene; Alkyl oligosilylene groups such as tetramethyldisilene; germylene groups; alkylgermylene groups in which silicon in the above-mentioned divalent hydrocarbon groups having 1 to 20 carbon atoms is replaced with germanium; (alkyl) (aryl) Germylene group; arylgermylene Examples include groups. In these, the silylene group which has a C1-C20 hydrocarbon group, or the germylene group which has a C1-C20 hydrocarbon group is preferable, and an alkylsilylene group and an alkylgermylene group are especially preferable.

Of the compounds represented by the general formula (1), preferred compounds are specifically exemplified below.
Dimethylsilylenebis (2- (2-furyl) -4-phenyl-indenyl) hafnium dichloride, dimethylsilylenebis (2- (2-thienyl) -4-phenyl-indenyl) hafnium dichloride, dimethylsilylenebis (2- (2 -(5-methyl) -furyl) -4-phenyl-indenyl) hafnium dichloride, diphenylsilylenebis (2- (2- (5-methyl) -furyl) -4-phenyl-indenyl) hafnium dichloride, dimethylgermylenebis (2- (2- (5-Methyl) -furyl) -4-phenyl-indenyl) hafnium dichloride, dimethylgermylenebis (2- (2- (5-methyl) -thienyl) -4-phenyl-indenyl) hafnium Dichloride, dimethylsilylenebis (2- (2- (5-t Butyl) -furyl) -4-phenyl-indenyl) hafnium dichloride, dimethylsilylenebis (2- (2- (5-trimethylsilyl) -furyl) -4-phenyl-indenyl) hafnium dichloride, dimethylsilylenebis (2- (2 -(5-phenyl) -furyl) -4-phenyl-indenyl) hafnium dichloride, dimethylsilylenebis (2- (2- (4,5-dimethyl) -furyl) -4-phenyl-indenyl) hafnium dichloride, dimethylsilylene Bis (2- (2-benzofuryl) -4-phenyl-indenyl) hafnium dichloride, diphenylsilylenebis (2- (2- (5-methyl) -furyl) -4-phenyl-indenyl) hafnium dichloride, dimethylsilylenebis ( 2- (2- (5-Methyl -Furyl) -4-methyl-indenyl) hafnium dichloride, dimethylsilylenebis (2- (2- (5-methyl) -furyl) -4-isopropyl-indenyl) hafnium dichloride, dimethylsilylenebis (2- (2-furfuryl) ) -4-phenyl-indenyl) hafnium dichloride, dimethylsilylenebis (2- (2- (5-methyl) -furyl) -4- (4-chlorophenyl) -indenyl) hafnium dichloride, dimethylsilylenebis (2- (2 -(5-Methyl) -furyl) -4- (4-fluorophenyl) -indenyl) hafnium dichloride, dimethylsilylenebis (2- (2- (5-methyl) -furyl) -4- (4-trifluoromethyl) Phenyl) -indenyl) hafnium dichloride, dimethylsilylenebi (2- (2- (5-methyl) -furyl) -4- (4-t-butylphenyl) -indenyl) hafnium dichloride, dimethylsilylenebis (2- (2-furyl) -4- (1-naphthyl) ) -Indenyl) hafnium dichloride, dimethylsilylenebis (2- (2-furyl) -4- (2-naphthyl) -indenyl) hafnium dichloride, dimethylsilylenebis (2- (2-furyl) -4- (2-phenanthryl) ) -Indenyl) hafnium dichloride, dimethylsilylenebis (2- (2-furyl) -4- (9-phenanthryl) -indenyl) hafnium dichloride, dimethylsilylenebis (2- (2- (5-methyl) -furyl)- 4- (1-naphthyl) -indenyl) hafnium dichloride, dimethylsilylenebis (2- (2 (5-Methyl) -furyl) -4- (2-naphthyl) -indenyl) hafnium dichloride, dimethylsilylenebis (2- (2- (5-methyl) -furyl) -4- (2-phenanthryl) -indenyl) Hafnium dichloride, dimethylsilylenebis (2- (2- (5-methyl) -furyl) -4- (9-phenanthryl) -indenyl) hafnium dichloride, dimethylsilylenebis (2- (2- (5-t-butyl) -Furyl) -4- (1-naphthyl) -indenyl) hafnium dichloride, dimethylsilylenebis (2- (2- (5-t-butyl) -furyl) -4- (2-naphthyl) -indenyl) hafnium dichloride, Dimethylsilylenebis (2- (2- (5-t-butyl) -furyl) -4- (2-phenanthryl) -indene ) Hafnium dichloride, dimethylsilylene bis (2- (2- (5-t-butyl) -furyl) -4- (9-phenanthryl) -indenyl) hafnium dichloride, dimethylsilylene (2-methyl-4-phenyl-indenyl) ) (2- (2- (5-methyl) -furyl) -4-phenyl-indenyl) hafnium dichloride, dimethylsilylene (2-methyl-4-phenyl-indenyl) (2- (2- (5-methyl)- And thienyl) -4-phenyl-indenyl) hafnium dichloride.

Of these, more preferred are dimethylsilylene bis (2- (2- (5-methyl) -furyl) -4-phenyl-indenyl) hafnium dichloride, dimethylgermylene bis (2- (2- (5-methyl). ) -Thienyl) -4-phenyl-indenyl) hafnium dichloride, dimethylsilylenebis (2- (2- (5-methyl) -furyl) -4- (4-chlorophenyl) -indenyl) hafnium dichloride, dimethylsilylenebis (2 -(2- (5-methyl) -furyl) -4-naphthyl-indenyl) hafnium dichloride, dimethylsilylenebis (2- (2- (5-methyl) -furyl) -4- (4-t-butylphenyl) -Indenyl) hafnium dichloride, dimethylsilylene (2-methyl-4-phenyl-indenyl) ( - (2- (5-methyl) - furyl) -4-phenyl - indenyl) hafnium dichloride.
Also particularly preferred are dimethylsilylene bis (2- (2- (5-methyl) -furyl) -4-phenyl-indenyl) hafnium dichloride, dimethylsilylene bis (2- (2- (5-methyl) -furyl). ) -4-naphthyl-indenyl) hafnium dichloride, dimethylsilylenebis (2- (2- (5-methyl) -furyl) -4- (4-t-butylphenyl) -indenyl) hafnium dichloride.

(2) Component (b):
Next, the catalyst component (b) used in the present invention is an ion-exchange layered silicate.
(I) Types of ion-exchange layered silicates In the present invention, ion-exchange layered silicates (hereinafter sometimes simply referred to as silicates) are surfaces in which ionic bonds or the like are formed by a binding force. It refers to a silicate compound that has a crystal structure that is stacked in parallel and that allows the contained ions to be exchanged. Most silicates are naturally produced mainly as the main component of clay minerals, and are generally dispersed / swelled in water and purified by differences in sedimentation rate, etc., but they can be completely removed. Although it may be difficult and contains impurities (quartz, cristobalite, etc.) other than ion-exchangeable layered silicate, they may be included. Depending on the type, amount, particle size, crystallinity, and dispersion state of these impurities, it may be preferable to pure silicate, and such a complex is also included in component (b).
In addition, the raw material of this invention refers to the silicate of the previous stage which performs the chemical treatment of this invention mentioned later. Further, the silicate used in the present invention is not limited to a natural product, and may be an artificial synthetic product.
In addition, in the present invention, if there is ion exchange properties before chemical treatment, the physical and chemical properties are changed by the treatment, and silicates having no ion exchange properties or layer structures are also included. Treated as an ion-exchanged layered silicate.

Specific examples of ion-exchanged layered silicates include layered silicates having a 1: 1 type structure or a 2: 1 type structure described in, for example, Haruo Shiramizu “Clay Mineralogy” Asakura Shoten (1988). Can be mentioned.
The 1: 1 type structure is based on the stacking of the 1: 1 layer structure in which one layer of tetrahedron sheet and one layer of octahedron sheet are combined as described in the above “clay mineralogy” and the like. The 2: 1 type structure is a structure based on a stack of 2: 1 layer structures in which two layers of tetrahedral sheets sandwich one layer of octahedral sheets.

  Specific examples of ion-exchangeable layered silicates in which the 1: 1 layer is the main constituent layer include kaolin silicates such as dickite, nacrite, kaolinite, metahalloysite, halloysite, chrysotile, risardite, antigolite, etc. Examples include serpentine silicates.

  Specific examples of ion-exchangeable layered silicates with 2: 1 layers as main constituent layers include smectite group silicates such as montmorillonite, beidellite, nontronite, saponite, hectorite, stevensite, and vermiculite groups such as vermiculite. Examples thereof include mica group silicates such as silicate, mica, illite, sericite, and sea green stone, attapulgite, sepiolite, palygorskite, bentonite, pyrophyllite, talc, chlorite group, and the like. These may form a mixed layer.

  Among these, the main component is preferably an ion-exchange layered silicate having a 2: 1 type structure. More preferably, the main component is a smectite group silicate, and still more preferably, the main component is montmorillonite.

  The type of interlayer cations (cations contained between the layers of the ion-exchange layered silicate) is not particularly limited, but as a main component, alkali metals of the first group of the periodic table such as lithium and sodium, calcium and magnesium Alkali earth metals of Group 2 of the periodic table, etc., or transition metals such as iron, cobalt, copper, nickel, zinc, ruthenium, rhodium, palladium, silver, iridium, platinum, gold, etc. are relatively It is preferable in that it can be easily obtained.

(II) Granulation of ion-exchangeable layered silicate The ion-exchangeable layered silicate may be used in a dry state or in a slurry state in a liquid. In addition, the shape of the ion-exchange layered silicate is not particularly limited, and may be a naturally produced shape, a shape when artificially synthesized, or a shape by operations such as pulverization, granulation, and classification. You may use the processed ion exchange layered silicate. Of these, the granulated ion-exchange layered silicate is particularly preferable because it gives good polymer particle properties when the ion-exchange layered silicate is used as a catalyst component.

  Processing of the shape of the ion-exchange layered silicate such as granulation, pulverization, and classification may be performed before the chemical treatment (that is, the following chemical treatment is performed on the ion-exchange layered silicate that has been processed in advance). The shape may be processed after chemical treatment.

  Examples of the granulation method used here include stirring granulation method, spray granulation method, rolling granulation method, briquetting, compacting, extrusion granulation method, fluidized bed granulation method, emulsion granulation method. , Submerged granulation method, compression molding granulation method, and the like, but are not particularly limited. Preferably, agitation granulation method, spray granulation method, rolling granulation method, and fluidized granulation method are exemplified, and particularly preferably, agitation granulation method and spray granulation method are exemplified.

  When spray granulation is performed, water or an organic solvent such as methanol, ethanol, chloroform, methylene chloride, pentane, hexane, heptane, toluene, and xylene is used as a dispersion medium for the raw slurry. Preferably, water is used as a dispersion medium. The concentration of the component (b) in the raw slurry liquid for spray granulation from which spherical particles are obtained is 0.1 to 30% by weight, preferably 0.5 to 20% by weight, particularly preferably 1 to 10% by weight. . The inlet temperature of the hot air for spray granulation from which spherical particles are obtained varies depending on the dispersion medium, but is 80 to 260 ° C, preferably 100 to 220 ° C when water is taken as an example.

  In granulation, in order to obtain a carrier having high particle strength and to improve propylene polymerization activity, the silicate is refined as necessary. The silicate may be refined by any method. As a method for miniaturization, either dry pulverization or wet pulverization is possible. Preferably, wet pulverization using water as a dispersion medium and utilizing the swellability of silicate, for example, a method using forced stirring using polytron or the like, a method using dyno mill, pearl mill, or the like. The average particle size before granulation is 0.01 to 3 μm, preferably 0.05 to 1 μm.

  Moreover, you may use organic substance, an inorganic solvent, inorganic salt, and various binders in the case of granulation. Examples of the binder used include magnesium chloride, aluminum sulfate, aluminum chloride, magnesium sulfate, alcohols, glycols and the like.

  The spherical particles obtained as described above preferably have a compression fracture strength of 0.2 MPa or more in order to suppress crushing and fine powder generation in the polymerization step. The particle size of the granulated ion-exchange layered silicate is in the range of 0.1 to 1000 μm, preferably 1 to 500 μm. There is no particular limitation on the pulverization method, and either dry pulverization or wet pulverization may be used.

(III) Chemical treatment of ion-exchange layered silicate The ion-exchange layered silicate of the catalyst component (b) according to the present invention can be used as it is without any treatment, but it is desirable to perform the chemical treatment. The chemical treatment of the ion-exchange layered silicate refers to bringing an acid, salt, alkali, organic substance or the like into contact with the ion-exchange layered silicate.

  A common effect of chemical treatment is to exchange interlayer cations. In addition, various chemical treatments have the following various effects. For example, according to the acid treatment with acids, impurities on the silicate surface can be removed and the surface area can be increased by eluting cations such as Al, Fe, and Mg in the crystal structure. This contributes to increasing the acid strength of the silicate and increasing the amount of acid sites per unit weight.

  In alkali treatment with alkalis, the crystal structure of the clay mineral is destroyed, resulting in a change in the structure of the clay mineral.

  Below, the specific example of a processing agent is shown. In the present invention, a combination of the following acids and salts may be used as the treating agent. Moreover, the combination of these acids and salts may be sufficient.

(I) Acids In addition to removing impurities on the surface or exchanging cations existing between layers, the acid treatment is carried out in part or all of cations such as Al, Fe and Mg incorporated in the crystal structure. Can be eluted. Examples of the acid used in the acid treatment include hydrochloric acid, nitric acid, sulfuric acid, phosphoric acid, acetic acid, oxalic acid, benzoic acid, stearic acid, propionic acid, acrylic acid, maleic acid, fumaric acid, and phthalic acid. Of these, inorganic acids are preferable, sulfuric acid, hydrochloric acid and nitric acid are preferable, and sulfuric acid is more preferable.

(Ii) Salts Salts are composed of a cation selected from the group consisting of an organic cation, an inorganic cation, and a metal ion, and an anion selected from the group consisting of an organic anion, an inorganic anion, and a halide ion. Examples of such salts are exemplified. For example, at least one selected from the group consisting of a cation containing at least one atom selected from Groups 1 to 14 of the periodic table, a halogen anion, an inorganic Bronsted acid, and an organic Bronsted acid anion. A preferred example is a compound composed of an anion.

Specific examples of such salts include LiCl, LiBr, Li ₂ SO ₄ , Li ₃ (PO ₄ ), LiNO ₃ , Li (OOCCH ₃ ), NaCl, NaBr, Na ₂ SO ₄ , and Na ₃ (PO ₄ ). , NaNO ₃ , Na (OOCCH ₃ ), KCl, KBr, K ₂ SO ₄ , K ₃ (PO ₄ ), KNO ₃ , K (OOCCH ₃ ), CaCl ₂ , CaSO ₄ , Ca (NO ₃ ) ₂ , Ca ₃ (C ₆ H ₅ O ₇ ) ₂ , Ti (OOCCH ₃ ) ₄ , MgCl ₂ , MgSO ₄ , Mg (NO ₃ ) ₂ , Mg ₃ (C ₆ H ₅ O ₇ ) ₂ , Ti (OOCCH ₃ ) ₄ , Ti (CO ₃ ) ₂ , Ti (NO ₃ ) ₄ , Ti (SO ₄ ) ₂ , TiF ₄ , TiCl ₄ , TiBr ₄ , TiI ₄ , Zr (OOCCH ₃ ) ₄ , Zr (CO ₃ ) ₂ , Zr (NO ₃ ) ₄ , Zr (SO ₄ ) ₂ , ZrF ₄ , ZrCl _{4 and the} like.

Also, Cr (OOCH ₃ ) ₂ OH, Cr (CH ₃ COCHCOCH ₃ ) ₃ , Cr (NO ₃ ) ₃ , Cr (ClO ₄ ) ₃ , CrPO ₄ , Cr ₂ (SO ₄ ) ₃ , CrO ₂ Cl ₃ , CrF ₃ , CrCl ₃ , CrBr ₃ , CrI ₃ , FeCO ₃ , Fe (NO ₃ ) ₃ , Fe (ClO ₄ ) ₃ , FePO ₄ , FeSO ₄ , Fe ₂ (SO ₄ ) ₃ , FeF ₃ , FeCl ₃ , MnBr ₃ FeI ₃ , FeC ₆ H ₅ O ₇ , Co (OOCH ₃ ) _{2 and the} like.

Furthermore, CuCl ₂ , CuBr ₂ , Cu (NO ₃ ) ₂ , CuC ₂ O ₄ , Cu (ClO ₄ ) ₂ , CuSO ₄ , Cu (OOCCH ₃ ) ₂ , Zn (OOCH ₃ ) ₂ , Zn (CH ₃ COCHCOCH ₃ ) ₂ , ZnCO ₃ , Zn (NO ₃ ) ₂ , Zn (ClO ₄ ) ₂ , Zn ₃ (PO ₄ ) ₂ , ZnSO ₄ , ZnF ₂ , ZnCl ₂ , ZnBr ₂ , ZnI ₂ , AlF ₃ , AlCl ₃ , AlBr ₃ , AlI ₃ , Al ₂ (SO ₄ ) ₃ , Al ₂ (C ₂ O ₄ ) ₃ , Al (CH ₃ COCHCOCH ₃ ) ₃ , Al (NO ₃ ) ₃ , AlPO _{4 and the} like.
Among these, a compound in which the anion is composed of an inorganic Bronsted acid or a halogen and the cation is composed of Li, Mg, or Zn is preferable.
Particularly preferred compounds of such salts include LiCl, Li ₂ SO ₄ , MgCl ₂ , MgSO ₄ , ZnCl ₂ , ZnSO ₄ , Zn (NO ₃ ) ₂ , Zn ₃ (PO ₄ ) ₂ .

(Iii) Other treatment agents In addition to the acid and salt treatment, the following alkali treatment or organic matter treatment may be performed as necessary. Examples of the treatment agent in the alkali treatment include LiOH, NaOH, KOH, Mg (OH) ₂ , Ca (OH) ₂ , Sr (OH) ₂ , Ba (OH) _{2 and the} like.

  Examples of organic treating agents include trimethylammonium, triethylammonium, tripropylammonium, tributylammonium, dodecylammonium, N, N-dimethylanilinium, N, N-diethylanilinium, N, N-2,4,5- Examples thereof include, but are not limited to, pentamethylanilinium, N, N-dimethyloctadecylammonium, and octadodecylammonium.

  Moreover, these processing agents may be used independently and may be used in combination of 2 or more types. These combinations may be used in combination for the treatment agent added at the start of the treatment, or may be used in combination for the treatment agent added during the treatment. The chemical treatment can be performed a plurality of times using the same or different treatment agents.

(Iv) Chemical treatment conditions The various treatment agents described above may be dissolved in an appropriate solvent and used as a treatment solution, or the treatment agent itself may be used as a solvent. Although there is no restriction | limiting in particular as a solvent which can be used, Water and alcohol are common, and water is especially preferable. For example, when performing acid treatment as a chemical treatment, by controlling acid treatment conditions such as acid treatment agent concentration, ratio of ion-exchange layered silicate and treatment agent, treatment time, treatment temperature, etc., an ion layered silicate compound Can be controlled by changing to a predetermined composition and structure.

Regarding such an acid treating agent concentration, it is preferable to treat with an acid having an acid concentration (N) satisfying the following formula.
N ≧ 1.0
The acid concentration N shown here is defined as the number of moles of acid × the valence of acid / the volume of the acid aqueous solution (unit: mole / liter). However, when a salt is allowed to coexist, the amount of water of crystallization contained in the salt compound is considered, but the volume change due to the salt is not considered. As for the specific gravity of the acid aqueous solution, the basic edition IIp6 (edited by the Chemical Society of Japan, published by Maruzen, revised 3rd edition) of the Chemical Handbook was cited. The upper limit of the acid concentration N is preferably 20 or less, particularly 15 or less, from the viewpoint of safety in handling, ease, and equipment.

The ratio between the ion-exchange layered silicate and the treatment agent is not particularly limited, but preferably, the ion-exchange layered silicate [g]: treatment agent [acid valence × mol number] = 1: 0.001. ˜1: About 0.1.
The acid treatment temperature is preferably in the range of room temperature to the boiling point of the treatment agent solution, the treatment time is selected from 5 minutes to 24 hours, and at least a part of the material constituting the ion-exchange layered silicate is It is preferable to carry out under the conditions for removal or replacement. The acid treatment conditions are not particularly limited, but when sulfuric acid is used as the chemical treatment, the treatment temperature is from 80 ° C. to the boiling point of the treating agent solvent and the treatment time may be from 0.5 hours to less than 5 hours. preferable.

(IV) Drying of ion-exchange layered silicate It is possible to remove the excessive treatment agent and ions eluted by the treatment after the chemical treatment is performed, which is preferable. At this time, generally, a liquid such as water or an organic solvent is used. After the dehydration, drying is performed. In general, the drying temperature can be 100 to 800 ° C, preferably 150 to 600 ° C. Exceeding 800 ° C. is not preferable because it may cause structural destruction of the silicate.

  Since these ion-exchange layered silicates have different characteristics depending on the drying temperature even if they are not structurally destroyed, it is preferable to change the drying temperature depending on the application. The drying time is usually 1 minute to 24 hours, preferably 5 minutes to 4 hours, and the atmosphere is preferably dry air, dry nitrogen, dry argon, or under reduced pressure. It does not specifically limit regarding a drying method, It can implement by various methods.

(V) Composition after chemical treatment of ion-exchangeable layered silicate The chemical-treated ion-exchangeable layered silicate is 0.01% as the atomic ratio of Al / Si as the catalyst component (b) according to the present invention. It is preferably -0.25, preferably 0.03-0.24, more preferably 0.05-0.23. The Al / Si atomic ratio is considered to be an index of the acid treatment strength of the clay portion. In addition, as a method for controlling the Al / Si atomic ratio within the above range, there is a method in which montmorillonite is used as the ion-exchange layered silicate before chemical treatment and the chemical treatment described in (III) is performed. .
Aluminum and silicon in the ion-exchange layered silicate are measured by a method of preparing a calibration curve by a chemical analysis method by JIS method and quantifying with a fluorescent X-ray.

(3) Component (c):
The catalyst component (c) used in the present invention is an organoaluminum compound, and preferably an organoaluminum compound represented by the general formula (AlR _n X _3-n ) _m is used. In formula, R represents a C1-C20 alkyl group, X represents a halogen, hydrogen, an alkoxy group, or an amino group, n represents 1-3, m represents the integer of 1-2, respectively. The organoaluminum compounds can be used alone or in combination.

  Specific examples of the organoaluminum compound include trimethylaluminum, triethylaluminum, trinormalpropylaluminum, trinormalbutylaluminum, triisobutylaluminum, trinormalhexylaluminum, trinormaloctylaluminum, trinormaldecylaluminum, diethylaluminum chloride, diethylaluminum. Examples thereof include sesquichloride, diethylaluminum hydride, diethylaluminum ethoxide, diethylaluminum dimethylamide, diisobutylaluminum hydride, and diisobutylaluminum chloride. Of these, trialkylaluminum and alkylaluminum hydride with m = 1 and n = 3 are preferable. More preferably, R is a trialkylaluminum having 1 to 8 carbon atoms.

(4) Catalyst adjustment:
The catalyst for olefin polymerization according to the present invention comprises the above component (a), component (b) and component (c). These may be contacted in the polymerization tank or outside the polymerization tank and preliminarily polymerized in the presence of olefin.
The olefin refers to a hydrocarbon having at least one carbon-carbon double bond, and examples thereof include ethylene, propylene, 1-butene, 1-hexene, 3-methylbutene-1, styrene, divinylbenzene, and the like. There is no restriction | limiting, You may use the mixture of these and another olefin. An olefin having 3 or more carbon atoms is preferable.

  The amount of component (a), component (b) and component (c) used is arbitrary, but the ratio of the transition metal in component (b) to the aluminum in component (c) is the component (a). It is preferable to make it contact so that it may become 0.1-1000 (micromol): 0-100,000 (micromol) per 1g. In addition to the component (a), other types of complexes can be used as long as the substance of the present invention can be produced.

  The order of contacting the component (a), the component (b) and the component (c) is arbitrary, and after contacting two of these components, the remaining one component may be contacted, The components may be contacted simultaneously. In these contacts, a solvent may be used for sufficient contact. Examples of the solvent include aliphatic saturated hydrocarbons, aromatic hydrocarbons, aliphatic unsaturated hydrocarbons, halides thereof, and prepolymerized monomers. Specific examples of the aliphatic saturated hydrocarbon and the aromatic hydrocarbon include hexane, heptane, toluene and the like. Further, as a prepolymerized monomer, propylene can be used as a solvent.

[Prepolymerization]:
As described above, the catalyst according to the present invention is preferably subjected to a prepolymerization process comprising a small amount of polymerization by bringing an olefin into contact therewith. The olefin used is not particularly limited, but as described above, ethylene, propylene, 1-butene, 1-hexene, 1-octene, 4-methyl-1-pentene, 3-methyl-1-butene, vinylcyclohexane. Examples include alkanes and styrene. The olefin feed method may be any method such as a feed method for maintaining the olefin at a constant rate or a constant pressure in the reaction tank, a combination thereof, or a stepwise change.
The prepolymerization temperature and time are not particularly limited, but are preferably in the range of −20 ° C. to 100 ° C. and 5 minutes to 24 hours, respectively. Further, the prepolymerization amount is preferably 0.01 to 100, more preferably 0.1 to 50, by weight ratio of the prepolymerized polymer to the component (b). Further, the component (c) can be added or added during the prepolymerization.
A method of coexisting a polymer such as polyethylene or polypropylene and a solid of an inorganic oxide such as silica or titania at the time of contacting or after the contact of the above components is also possible.
The catalyst may be dried after the prepolymerization. The drying method is not particularly limited, and examples thereof include reduced-pressure drying, heat drying, and drying by circulating a drying gas. These methods may be used alone or in combination of two or more methods. May be. In the drying step, the catalyst may be stirred, vibrated, fluidized, or allowed to stand.

[Detailed description of polymerization method]:
As the polymerization mode, any mode can be adopted as long as the olefin polymerization catalyst comprising the component (a), the component (b) and the component (c) and the monomer come into efficient contact. Specifically, a slurry method using an inert solvent, a bulk polymerization method using propylene as a solvent without substantially using an inert solvent, or a gas phase polymerization method for maintaining each monomer in a gaseous state without using a liquid solvent. Etc. can be adopted.
As the polymerization method, a method of performing continuous polymerization, batch polymerization, or prepolymerization is also applied.
Further, the number of polymerization stages is not particularly limited as long as the substance of the present invention can be produced. However, it is possible to employ a mode such as two stages of bulk polymerization, gas phase polymerization after bulk polymerization, and two stages of gas phase polymerization, and more. It is possible to produce with the number of polymerization stages.
However, in order to obtain the compound having the molecular weight and molecular weight distribution disclosed in the present invention, the first step is performed by bulk polymerization and the second step is performed by gas phase polymerization, or both the first step and the second step are performed. It is preferable to carry out by phase polymerization.

[First step]:
In the case of slurry polymerization, a saturated aliphatic or aromatic hydrocarbon such as hexane, heptane, pentane, cyclohexane, benzene, toluene, or the like is used alone or as a polymerization solvent. The polymerization temperature is 0 to 150 ° C., and hydrogen can be used supplementarily as a molecular weight regulator. The polymerization pressure is suitably from 0 to 3 MPaG, preferably from 0 to 2 MPaG.
In the case of the bulk polymerization method, the polymerization temperature is 0 to 80 ° C, preferably 60 to 90 ° C, and more preferably 70 to 80 ° C. The polymerization pressure is 0 to 5 MPaG, preferably 0 to 4 MPaG.
In the case of gas phase polymerization, the polymerization temperature is 0 to 200 ° C, preferably 60 to 120 ° C, more preferably 70 to 100 ° C. The polymerization pressure is suitably from 0 to 4 MPaG, preferably from 0 to 3 MPaG.
Moreover, it is preferable not to use hydrogen as a molecular weight modifier in order to suppress chain transfer due to hydrogen and increase the terminal vinyl content.

[Second step]:
In the case of gas phase polymerization, the polymerization temperature is 20 to 90 ° C, preferably 30 to 80 ° C, and more preferably 50 to 80 ° C. In addition, hydrogen can be used supplementarily as a molecular weight regulator. The polymerization pressure is suitably from 0 to 4 MPaG, preferably from 0 to 3 MPaG.
When ethylene is used as a comonomer, it is necessary to control the gas phase ethylene gas composition to 10 mol% or more in order to produce a polymer having the desired composition, preferably 15 mol% or more, Preferably it is 20 mol% or more. Moreover, regarding an upper limit, it is 65 mol% or less, Preferably it is 60 mol% or less, More preferably, it is 50 mol% or less.

4). Resin Composition (1) Additional Components The following additional components can be further added to the resin composition comprising the components (Z) and (M) of the present invention.

(I) Elastomer component In the present invention, ethylene / α-olefin elastomer or styrene elastomer is added in the range of 0 to 70 parts by weight with respect to 100 parts by weight of the resin composition comprising components (Z) and (M). be able to.
The ethylene / α-olefin elastomer and the styrene elastomer are used for the purpose of improving impact resistance and exhibiting good moldability, physical properties, and shrinkage characteristics.

Examples of the comonomer copolymerized with ethylene in the ethylene / α-olefin elastomer include α-olefins having 4 to 20 carbon atoms, such as 1-octene and 1-butene. No, it may be a mixture of two or more ethylene / α-olefin elastomers or styrene elastomers. The content of α-olefin in the ethylene / α-olefin-based elastomer is 10 to 60% by weight, preferably 20 to 50% by weight, and the density is 0.85 to 0.90 cm ³ , preferably 0.86 to 0.88 cm. ³ .
The styrene elastomer is a block or random copolymer of styrene and ethylene, propylene, 1-butene, butadiene, isoprene or the like, or a hydrogenated product thereof. The amount of bound styrene in the styrene elastomer is 5 to 45. wt%, and preferably 10 to 40 wt%, 0.88～0.95Cm ³ in density, preferably 0.89~0.92cm ^3.

The MFR of the elastomer component at 230 ° C. and a load of 2.16 kg is 0.1 to 20 g / 10 minutes, preferably 0.5 to 10 g / 10 minutes. When the MFR is less than 0.1 g / min, the moldability and paintability are poor, and when the MFR exceeds 20 g / 10 min, the impact resistance is inferior.
The ethylene / α-olefin-based elastomer can be produced by polymerization using a known titanium-based catalyst or metallocene catalyst. In the case of a styrene-based elastomer, it can be obtained by a usual anionic polymerization method and its polymer hydrogenation technique.
The blending amount of the ethylene / α-olefin elastomer and the styrene elastomer is 0 to 70 parts by weight, and preferably 5 to 50 parts by weight, particularly preferably 10 to 40 parts by weight in the case where the impact is emphasized. . When the amount of the ethylene / α-olefin copolymer elastomer exceeds 70 parts by weight, the rigidity and heat resistance of the propylene-based resin composition are significantly lowered, which is not preferable.

(Ii) Inorganic filler In this invention, an inorganic filler can be added in 0-70 weight part with respect to 100 weight part of resin compositions which consist of component (Z) and (M).
Examples of the inorganic filler used in the present invention include talc, wollastonite, calcium carbonate, barium sulfate, mica, glass fiber, carbon fiber, clay, and organic clay, and preferably talc, mica, glass fiber. Carbon fiber, particularly preferably talc. Talc is effective for improvement of rigidity, dimensional stability of a molded product, and adjustment thereof.

The particle size (including fiber diameter) of the inorganic filler varies depending on the inorganic compound used, but in the case of fibers, the fiber diameter is 3 to 40 μm, and in the case of granules, the particle diameter is about 1.5 to 150 μm. In the case of talc, which is a suitable inorganic filler, the average particle size is preferably 1.5 to 40 μm, particularly preferably 2 to 15 μm. When the average particle diameter of talc is less than 1.5, the appearance is deteriorated by agglomeration. On the other hand, when it exceeds 40 μm, the impact strength is lowered, which is not preferable.
In the case of granular materials such as talc, generally, for example, talc rough is first pulverized with an impact pulverizer or micron mill type pulverizer, or further pulverized with a jet mill or the like, and then with a cyclone or micron separator. Manufacture by classification adjustment method.
The talc may be surface-treated with various metal soaps, and so-called compressed talc having an apparent specific volume of 2.50 ml / g or less may be used.
The average particle size of the above-mentioned granular material is a value measured using a laser diffraction / scattering particle size distribution meter, and as a measuring device, for example, Horiba LA-920 type is preferable because of its excellent measurement accuracy. The fiber diameter of carbon fiber or glass fiber is generally calculated by cutting the fiber perpendicular to the fiber direction, observing the cross section under a microscope, measuring the diameter, and averaging 100 or more.

  The blending amount of the inorganic filler in the composition is preferably 5 to 70 parts by weight, more preferably 7 to 50 parts by weight, and particularly preferably 10 to 40 parts by weight. If the amount of the inorganic filler is less than 5 parts by weight, the effect of improving the rigidity is insufficient, and if it exceeds 70 parts by weight, the impact resistance of the propylene-based resin composition is lowered, which is not preferable.

(2) Use of Other Components (i) Additives The resin composition of the present invention has the functions of the present invention in order to enhance the performance of the composition of the present invention or to impart other performance. Additives can also be blended within the range that is not impaired.
As this additional component, a nucleating agent widely used as a compounding agent for polyolefin resin, a phenolic antioxidant, a phosphorus antioxidant, a sulfur antioxidant, a neutralizer, a light stabilizer, an ultraviolet absorber, a lubricant Various additives such as antistatic agents, metal deactivators, peroxides, fillers, antibacterial agents, antifungal agents, fluorescent brighteners, colorants, and conductivity-imparting agents can be added.
The amount of these additives is generally 0.0001 to 5 parts by weight, preferably 0.001 to 3 parts by weight, based on 100 parts by weight of the composition.

(Ii) Use of other resins In order to further enhance the performance of the composition of the present invention or to impart other performance to the resin composition of the present invention, the functions of the present invention are not impaired. Other resin materials can also be blended.
As this additional component, LLDPE, LDPE, HDPE, modified polypropylene, polycarbonate, polyamide, modified PPE, etc. which are widely used as a compounding material for polyolefin resins can be added.
The amount of these resins is generally 0.5 to 10 parts by weight, preferably 1 to 5 parts by weight, based on 100 parts by weight of the composition.

(3) Production of resin composition In the present invention, the above-described components, that is, a propylene polymer composition, and if necessary, an elastomer, an inorganic filler, and other components are blended at the blending ratio described above. The propylene-based resin composition of the present invention is obtained by kneading and granulating using a normal kneader such as a single screw extruder, twin screw extruder, Banbury mixer, roll mixer, Brabender plastograph, kneader, etc. .
In this case, it is preferable to select a kneading and granulating method capable of improving the dispersion of each component, and it is usually performed using a twin-screw extruder. In this kneading and granulation, the above-mentioned components may be kneaded simultaneously or sequentially. Further, it is possible to adopt a method in which each component is divided and kneaded to improve performance.

(4) Use of resin composition Since the resin composition of the present invention has sufficiently improved rigidity, heat resistance and impact resistance in a well-balanced manner, it can be used for packaging of interior and exterior materials of vehicles such as automobiles and electrical products. It is useful as various industrial materials, including wood.

  EXAMPLES Next, although an Example demonstrates this invention further more concretely, this invention is not limited to a following example, unless the summary is exceeded. In addition, the physical-property measurement, analysis, etc. in a following example follow the following method.

(1) Melt flow rate (MFR)
According to JIS K7210A method and condition M, measurement was performed under the following conditions.
Test temperature: 230 ° C., nominal load: 2.16 kg, die shape: diameter 2.095 mm, length 8.000 mm. The unit is g / 10 minutes.

(2) Weight average molecular weight (Mw)
It was measured by the method described in the present specification by gel permeation chromatography (GPC).

(3) mm fraction It measured by the method as described in the said specification using JEOL Co., Ltd. make, GSX-400, and FT-NMR. The unit is%.

(4) Elongation viscosity It measured by the method as described in this specification using the rheometer.

(5) Melting temperature (Tm)
Measurements were made using a Seiko DSC.
After taking 5.0 mg of sample and holding it at 200 ° C. for 5 minutes, it is crystallized at a rate of temperature decrease of 10 ° C./min to 40 ° C. to erase its thermal history, and further melted at a rate of temperature increase of 10 ° C./min. The peak temperature of the melting curve is taken as the melting point. When a plurality of melting points are observed in the resin, the one observed at the highest temperature is taken as the melting point of the resin.

(6) Determination of ethylene content The average ethylene content in the copolymer was measured using an infrared spectrophotometer. The measurement conditions are shown below.
Equipment: Shimadzu FTIR-8300
Resolution: 4.0 cm ⁻¹
Measurement range: 4,000 to 400 cm ⁻¹
Sample adjustment: Polymer powder or pellets are adjusted to a film with a thickness of 500 μm with a heating and pressing press (temperature 190 ° C., preheating 2 minutes before pressing to 100 MPa)
Data processing:
(I) Using 760,700 cm ⁻¹ as a base point, calculate the absorbance peak area in that range (corresponding to ethylene content).
(Ii) Calculate the peak area / sample thickness.
(Iii) A calibration curve is prepared with a sample whose ethylene content has been quantified in advance by NMR, and the ethylene content is quantified by the formula [ethylene content∝peak area / sample thickness].

(7) Flexural properties Bending elasticity:
The flexural modulus of the obtained composition was evaluated under the following conditions.
Standard number: Compliant with JIS K-7171 (ISO178) Testing machine: Precision universal testing machine Autograph AG-20kNG (manufactured by Shimadzu Corporation)
Specimen sampling direction: Flow direction Specimen shape: Thickness 4 mm, width 10 mm, length 80 mm
Test piece preparation method: Injection molding Condition adjustment: Leave in a temperature-controlled room adjusted to room temperature 23 ° C and humidity 50% for more than 24 hours Test room: Temperature-controlled room temperature adjusted to room temperature 23 ° C and humidity 50% Number of test pieces : 5
Distance between fulcrums: 32.0mm
Test speed: 1.0 mm / min

(8) Impact strength Impact resistance was evaluated by Charpy impact test.
Standard number: Compliant with JIS K7111 (ISO 179 / 1eA) Tester: Toyo Seiki Co., Ltd., fully automatic Charpy impact tester (with constant temperature bath)
Shape of test piece: Test piece with single notch (thickness 4 mm, width 10 mm, length 80 mm)
Notch shape: Type A notch (notch radius 0.25mm)
Impact speed: 2.9 m / s
Nominal pendulum energy: 4J
Test piece preparation method: Notch cut into injection molded test piece (ISO 2818 compliant)
Condition adjustment: 24 hours or more in a temperature-controlled room adjusted to room temperature 23 ° C./humidity 50% Test room: Temperature-controlled room temperature adjusted to room temperature 23 ° C./humidity 50%
Test temperature: 23 ° C
Evaluation item: Absorbed energy

I. Production Example of Component (Z) [Production Example Z-1]
(I) Production of solid catalyst component (a) 20 liters of dehydrated and deoxygenated n-heptane was introduced into a tank equipped with a stirrer with an internal volume of 50 liters purged with nitrogen, and then 10 moles of magnesium chloride and 20 moles of tetrabutoxytitanium And then reacting at 95 ° C. for 2 hours, lowering the temperature to 40 ° C., introducing 12 liters of methylhydropolysiloxane (viscosity 20 centistokes) and further reacting for 3 hours, then taking out the reaction solution The resulting solid component was washed with n-heptane.
Subsequently, 5 liters of dehydrated and deoxygenated n-heptane was introduced into the tank using the tank equipped with a stirrer, and then 3 mol of the solid component synthesized above was introduced in terms of magnesium atom. Next, 5 liters of silicon tetrachloride was mixed with 2.5 liters of n-heptane and introduced at 30 ° C. for 30 minutes. The temperature was raised to 70 ° C. and reacted for 3 hours. Then, the reaction solution was taken out, The resulting solid component was washed with n-heptane.
Subsequently, 2.5 liters of dehydrated and deoxygenated n-heptane was introduced into the tank using the tank with a stirrer, and 0.3 mol of phthalic acid chloride was mixed and introduced at 90 ° C. for 30 minutes. And reacted at 95 ° C. for 1 hour. After completion of the reaction, washing with n-heptane was performed. Next, 2 liters of titanium tetrachloride was added at room temperature, and the temperature was raised to 100 ° C., followed by reaction for 2 hours. After completion of the reaction, washing with n-heptane was performed. Further, 0.6 liters of silicon tetrachloride and 8 liters of n-heptane were introduced, reacted at 90 ° C. for 1 hour, and sufficiently washed with n-heptane to obtain a solid component. This solid component contained 1.30% by weight of titanium.

Next, 8 liters of n-heptane, 400 g of the solid component obtained above, 0.27 mol of t-butyl-methyl-dimethoxysilane and 0.27 mol of vinyltrimethylsilane were introduced into the tank equipped with a stirrer substituted with nitrogen. And contacted at 30 ° C. for 1 hour. Next, the mixture was cooled to 15 ° C., 1.5 mol of triethylaluminum diluted in n-heptane was introduced over 15 minutes under 15 ° C., and after the introduction, the temperature was raised to 30 ° C. and reacted for 2 hours. -Washing with heptane gave 390 g of solid catalyst component (a).
The obtained solid catalyst component (a) contained 1.22% by weight of titanium.

Further, 6 liters of n-heptane and 1 mol of triisobutylaluminum diluted in n-heptane were introduced over 30 minutes under 15 ° C., and then about 0.4 kg of propylene was controlled so as not to exceed 20 ° C. Per hour for 1 hour and prepolymerized.
As a result, a polypropylene-containing solid catalyst component (a) in which 0.9 g of propylene was polymerized per 1 g of solid was obtained.

(Ii) Production of propylene-based block copolymer [Pre-stage polymerization step: Production of crystalline propylene polymer component]
Polymerization was carried out using a continuous reaction apparatus in which two fluidized bed reactors having an internal volume of 230 liters were connected.
First, in a first reactor, a polymerization temperature of 75 ° C., a propylene partial pressure of 18 kg / cm ² (absolute pressure), and hydrogen as a molecular weight control agent are continuously added so that the molar ratio of hydrogen / propylene is 0.040. While feeding, triethylaluminum was fed at 5.25 g / hr as a solid catalyst component (a) so that the polymer polymerization rate was 20 kg / hr to produce a crystalline propylene polymer component.
The powder polymerized in the first reactor (crystalline propylene polymer component) was continuously withdrawn so that the amount of powder held in the reactor was 60 kg, and continuously transferred to the second reactor.

[Second-stage polymerization step: Production of propylene / ethylene random copolymer component]
Subsequently, propylene and ethylene were continuously fed so that the molar ratio of ethylene / propylene was 0.40 so that the inside of the second reactor had a polymerization temperature of 80 ° C. and a pressure of 2.0 MPa, Hydrogen as a molecular weight control agent is continuously supplied so that the molar ratio of hydrogen / (propylene + ethylene) is 0.0070, and ethyl alcohol as an active hydrogen compound is 1.5 times that of triethylaluminum. The propylene / ethylene random copolymer component was produced by supplying the solution so as to have a molar ratio.
The powder that has been polymerized in the second reactor (a propylene-based block copolymer comprising a crystalline propylene polymer component and a propylene / ethylene random copolymer component) has a powder holding amount of 40 kg in the reactor. And continuously extracted into a vessel. Nitrogen gas containing water was supplied to stop the reaction to obtain a propylene-based block copolymer.

II. Production Example of Component (M) [Production Example M-1]
(1) [Synthesis of rac-dimethylsilylenebis (2- (2- (5-methyl) -furyl) -4-phenyl-indenyl) hafnium dichloride]:
Synthesis of (1-a) dimethylbis (2- (2- (5-methyl) -furyl) -4-phenyl-indenyl) silane:
Synthesis was performed according to the method described in Example 1 of JP-A-2004-124044.

Synthesis of (1-b) rac-dimethylsilylenebis (2- (2- (5-methyl) -furyl) -4-phenyl-indenyl) hafnium dichloride:
In a 100 ml glass reaction vessel, 5.3 g (8.8 mmol) of dimethylbis (2- (2- (5-methyl) -furyl) -4-phenyl-indenyl) silane and 150 ml of diethyl ether were added, and dry ice was added. -It cooled to -70 degreeC with the methanol bath. To this, 12 ml (18 mmol) of a 1.50 mol / liter n-butyllithium-hexane solution was added dropwise. After dropping, the temperature was returned to room temperature and stirred for 16 hours. The solvent of the reaction solution was concentrated under reduced pressure to about 20 ml, 200 ml of toluene was added, and the solution was cooled to −70 ° C. in a dry ice-methanol bath. Thereto was added 2.8 g (8.7 mmol) of hafnium tetrachloride. Thereafter, the mixture was stirred for 3 days while gradually returning to room temperature.
The solvent was distilled off under reduced pressure, recrystallized from dichloromethane / hexane, and racemic dimethylsilylenebis (2- (2- (5-methyl) -furyl) -4-phenyl-indenyl) hafnium dichloride (purity 99% or more). ) Was obtained as yellow-orange crystals (2.9 g, yield 39%).

The resulting proton nuclear magnetic resonance method for racemate identified value according to ^{(1 H-NMR)} are shown below.

^[1 H-NMR (CDCl3) identification result]
Racemate: δ 1.12 (s, 6H), δ 2.42 (s, 6H), δ 6.06 (d, 2H), δ 6.24 (d, 2H), δ 6.78 (dd, 2H), δ 6. 97 (d, 2H), δ 6.96 (s, 2H), δ 7.25 to δ 7.64 (m, 12H).

(2) [Catalyst synthesis]:
(2-1) Chemical treatment of ion-exchanged layered silicate 96% sulfuric acid (1044 g) was added to 3456 g of distilled water in a separable flask, and then montmorillonite (Menzawa Chemical Co., Ltd. Benclay SL: average particle size 19 μm) as a layered silicate. ) 600 g was added. The slurry was heated to 90 ° C. over 1 hour at 0.5 ° C./minute, and reacted at 90 ° C. for 120 minutes. The reaction slurry was cooled to room temperature in 1 hour, added with 2400 g of distilled water and then filtered to obtain 1230 g of a cake-like solid.
Next, 648 g of lithium sulfate and 1800 g of distilled water were added to the separable flask to make a lithium sulfate aqueous solution, and the entire amount of the above-mentioned cake solid was added, and further 522 g of distilled water was added. The slurry was heated to 90 ° C. over 1 hour at 0.5 ° C./minute, and reacted at 90 ° C. for 120 minutes. The reaction slurry was cooled to room temperature in 1 hour, added with 1980 g of distilled water, filtered, further washed with distilled water to pH 3, and filtered to obtain 1150 g of a cake-like solid.
The obtained solid was preliminarily dried at 130 ° C. for 2 days under a nitrogen stream, and then coarse particles of 53 μm or more were removed, and further, rotary kiln drying was performed under a condition of 215 ° C. under a nitrogen stream for a residence time of 10 minutes. 340 g was obtained.
The composition of this chemically treated smectite is Al: 7.81 wt%, Si: 36.63 wt%, Mg: 1.27 wt%, Fe: 1.82 wt%, Li: 0.20 wt%, Al / Si = 0.222 [mol / mol].

(2-2) Catalyst Preparation and Prepolymerization In a three-necked flask (volume: 1 L), 20 g of the chemically treated smectite obtained above was added, and heptane (114 mL) was added to form a slurry, to which triethylaluminum (50 mmol: 81 mL) of a heptane solution having a concentration of 71 mg / mL was added and stirred for 1 hour, then washed to 1/1000 with heptane, and heptane was added so that the total volume became 200 mL.
In another flask (volume 200 mL), heptane (85 mL) was added to rac-dimethylsilylenebis (2- (2- (5-methyl) -furyl) -4-phenyl-indenyl) hafnium dichloride (0.3 mmol). Then, triisobutylaluminum (0.6 mmol: 0.85 mL of a heptane solution with a concentration of 140 mg / mL) was added and stirred for 45 minutes at room temperature to cause a reaction. This solution was added to a 3 L flask containing chemically treated smectite and stirred at room temperature for 45 minutes. Thereafter, 214 mL of heptane was added, and this slurry was introduced into a 1 L autoclave.
After setting the internal temperature of the autoclave to 40 ° C., propylene was fed at a rate of 20 g / hour, and prepolymerization was performed while maintaining the temperature at 40 ° C. for 2 hours. Thereafter, propylene feed was stopped, and residual polymerization was performed at 50 ° C. for 0.5 hour. After removing the supernatant of the resulting catalyst slurry by decantation, the prepolymerized catalyst was washed by adding decantation again with heptane. Triisobutylaluminum (12 mmol: 17 mL of a heptane solution having a concentration of 140 mg / mL) was added to the portion remaining after the decantation, and the mixture was stirred for 10 minutes. This solid was dried under reduced pressure for 2 hours to obtain 47.6 g of a dry prepolymerized catalyst. The prepolymerization ratio (value obtained by dividing the amount of prepolymerized polymer by the amount of solid catalyst) was 1.38.

(3) [Polymerization]
First step polymerization:
The 3 L autoclave was thoroughly dried beforehand by circulating nitrogen under heating, and then the interior of the tank was replaced with propylene and cooled to room temperature. After adding 2.86 mL of a heptane solution of triisobutylaluminum (140 mg / mL) and introducing 750 g of liquid propylene, the temperature was raised to 70 ° C.
Thereafter, 200 mg of the prepolymerized catalyst in a weight excluding the prepolymerized polymer was pumped to the polymerization tank with high-pressure argon to initiate polymerization. After maintaining at 70 ° C. for 1 hour, unreacted propylene was quickly purged, and the inside of the autoclave was purged with nitrogen to stop the polymerization in the first step.
Using a Teflon (registered trademark) tube from the nitrogen-substituted autoclave, 7 g of the polymer after the first step was collected and analyzed.

Second step polymerization:
After maintaining the nitrogen-substituted autoclave at 50 ° C. and atmospheric pressure, propylene was added at a partial pressure of 1.0 MPa, and ethylene was then added at a partial pressure of 1.0 MPa to start polymerization in the second step. During the polymerization, a mixed gas of ethylene / propylene, which had been adjusted in advance so as to have a constant composition, was introduced to keep the total pressure at 2.0 MPa and maintained at 50 ° C.
The average gas composition of the polymerization in the second step was C2: 53.4%.
After 2 hours, the polymerization was stopped by purging an unreacted ethylene / propylene mixed gas. As a result, 275 g of a polymer was obtained.

A part of the obtained sample was melt-kneaded under the following conditions using a lab plast mill (model 50C150) manufactured by Toyo Seiki Co., Ltd.
Polymer: 42 g (1.0 parts of IRGASTAB FS210FF, 0.5 parts of hydrotalcite manufactured by Ciba Geigy)
Temperature: 170 ° C
Rotation speed: 70rpm
Time: 3 minutes Using the obtained sample, the elongation viscosity and the melt tension were measured by the measurement method 1.
The value of strain hardening λmax of this sample is 5.1, and it is considered that a graft copolymer is formed.

[Production Example M-2]
(1) [Polymerization]:
First step polymerization:
The 3 L autoclave was thoroughly dried beforehand by circulating nitrogen under heating, and then the interior of the tank was replaced with propylene and cooled to room temperature. After adding 2.86 mL of a heptane solution of triisobutylaluminum (140 mg / mL) and introducing 750 g of liquid propylene, the temperature was raised to 70 ° C. Thereafter, 210 mg of the prepolymerized catalyst in a weight excluding the prepolymerized polymer was pumped to the polymerization tank with high-pressure argon to initiate polymerization. After maintaining at 70 ° C. for 1 hour, unreacted propylene was quickly purged, and the inside of the autoclave was purged with nitrogen to stop the polymerization in the first step.
12 g of the polymer after the first step was recovered from a nitrogen-substituted autoclave using a Teflon (registered trademark) tube and analyzed.

Second step polymerization:
After maintaining the nitrogen-substituted autoclave at 50 ° C. and atmospheric pressure, 0.5 MPa, and then ethylene was quickly added to 1.5 MPa in partial pressure to start polymerization in the second step. During the polymerization, a mixed gas of ethylene / propylene, which had been adjusted in advance so as to have a constant composition, was introduced to keep the total pressure at 2.0 MPa and maintained at 50 ° C.
The average gas composition of the polymerization in the second step was C2: 72.5%.
After 2 hours, the polymerization was stopped by purging an unreacted ethylene / propylene mixed gas. As a result, 211 g of a polymer was obtained.
This sample was melt kneaded and evaluated for physical properties in the same manner as in Production Example M-1. The value of strain hardening λmax of this sample is 2.5, and it is considered that a graft copolymer is formed.

[Production Example M-3]
(2-2) Catalyst Preparation and Prepolymerization In a three-necked flask (volume: 1 L), 10 g of the chemically treated smectite obtained above was put, and heptane (66 mL) was added to form a slurry, to which triisobutylaluminum (24 mmol) was added. : 34 mL of a heptane solution having a concentration of 140 mg / mL) was added and stirred for 1 hour, then washed to 1/1000 with heptane, and heptane was added so that the total volume became 100 mL.
Further, (r) -dichloro [1,1′-dimethylsilylenebis {2-methyl-4- () synthesized according to the method described in JP-A-11-240909 was prepared in another flask (volume: 200 mL). 4-Chlorophenyl) -4H-azulenyl}] hafnium (0.30 mmol) was added toluene (43 mL) and stirred. Triisobutylaluminum (0.6 mmol: 0.85 mL of a heptane solution having a concentration of 140 mg / mL) was added to the 3 L flask containing the chemically treated smectite, and the complex solution was further added and stirred at room temperature for 60 minutes. Thereafter, 356 mL of heptane was added, and this slurry was introduced into a 1 L autoclave.
After the internal temperature of the autoclave was set to 40 ° C., propylene was fed at a rate of 10 g / hour, and prepolymerization was performed while maintaining 40 ° C. for 2 hours. Thereafter, propylene feed was stopped, and residual polymerization was performed at 50 ° C. for 0.5 hour. After removing the supernatant of the obtained catalyst slurry by decantation, triisobutylaluminum (12 mmol: 17 mL of a heptane solution having a concentration of 140 mg / mL) was added and stirred for 10 minutes. This solid was dried under reduced pressure for 2 hours to obtain 30.5 g of a dry prepolymerized catalyst. The prepolymerization ratio (value obtained by dividing the amount of prepolymerized polymer by the amount of solid catalyst) was 2.05.

(3) [Polymerization]
First step polymerization:
The 3 L autoclave was thoroughly dried in advance by circulating nitrogen under heating, and then the inside of the tank was replaced with propylene and cooled to room temperature. After adding 2.86 mL of a heptane solution of triisobutylaluminum (140 mg / mL) and introducing 750 g of liquid propylene, the temperature was raised to 70 ° C.
Thereafter, 20 mg of the prepolymerized catalyst prepared in [Production Example M-2] was pumped to the polymerization tank with high-pressure argon in a weight excluding the prepolymerized polymer, and polymerization was started. After maintaining at 70 ° C. for 1 hour, unreacted propylene was quickly purged, and the inside of the autoclave was purged with nitrogen to stop the polymerization in the first step.
Using a Teflon (registered trademark) tube from the nitrogen-substituted autoclave, 14 g of the polymer after the first step was collected and analyzed.

Second step polymerization:
After maintaining the above nitrogen-substituted autoclave at 70 ° C. and atmospheric pressure, propylene was added at a partial pressure of 0.5 MPa, and ethylene was then added at a partial pressure of 1.5 MPa to start polymerization in the second step. During the polymerization, a mixed gas of ethylene / propylene, which had been adjusted in advance so as to have a constant composition, was introduced and maintained at a total pressure of 2.0 MPa and maintained at 70 ° C.
The average gas composition of the polymerization in the second step was C2: 83.2%. After 60 minutes, the polymerization was stopped by purging the unreacted ethylene / propylene mixed gas. As a result, 291 g of a polymer was obtained.
This sample was melt kneaded and evaluated for physical properties in the same manner as in Production Example M-1. The elongational viscosity of this sample does not show strain hardening, that is, the value of the strain hardening degree λmax is 1.0, and it is considered that no graft copolymer is formed.
Tables 1 and 2 show the properties of the resins obtained in these production examples.

[Examples 1-3, Comparative Examples 1-2]
Each component was blended in the proportions shown in Tables 3 and 4, and physical properties were evaluated for those which were granulated and molded under the following conditions. The physical property evaluation results are shown in Tables 3 and 4, and the granulation conditions and molding conditions are shown below.

(With additives):
Antioxidant: Tetrakis {methylene-3- (3 ′, 5′-di-t-butyl-4′-hydroxyphenyl) propionate} methane 500 ppm, Tris (2,4-di-t-butylphenyl) phosphite 500 ppm Neutralizing agent: calcium stearate 500 ppm.

(Granulation):
Extruder: KZW-15-45MG twin screw extruder manufactured by Technobel Co., Ltd. Screw: 15 mm in diameter, L / D = 45
Extruder set temperature: (from below the hopper) 40, 80, 160, 200, 200, 200 (die temperature)
Screw rotation speed: 400rpm
Discharge amount: Adjusted to about 1.5 kg / hr with a screw feeder Die: 3 mm diameter, strand die, 2 holes

(Molding):
The obtained raw material pellets were injection molded under the following conditions to obtain flat plate test pieces for evaluating physical properties.
Standard number: JIS K7152 (ISO 294-1)
Reference molding machine: EC20P injection molding machine manufactured by Toshiba Machine Co., Ltd. Molding machine set temperature: 80, 210, 210, 200, 200 ° C (from the bottom of the hopper)
Mold temperature: 40 ℃
Injection speed: 52 mm / s (screw speed)
Holding pressure: 30 MPa
Holding pressure time: 8 seconds Mold shape: Two flat plates (thickness 4 mm, width 10 mm, length 80 mm) As an evaluation result, the Charpy impact strength plotted against the bending elastic modulus is shown in FIG.

As is apparent from Table 3 and FIG. 3, the resin compositions of the present invention shown in Examples 1 to 3 contain a graft copolymer, and include a specific crystalline component (A) and an amorphous component (B). Since it contains a specific amount of a specific propylene-ethylene copolymer (component (M)) composed of bismuth, both the flexural modulus and Charpy impact strength are excellent, and the rigidity-impact resistance balance is excellent. .
On the other hand, since the resin composition of Comparative Example 1 does not contain a specific propylene-ethylene copolymer (component (M)), the resin composition of Comparative Example 2 contains component (M-3). However, since the component (M-3) does not satisfy the characteristics defined in the present invention, as shown in FIG. Is bad.

  Since the resin composition of the present invention has substantially the same rigidity, the impact resistance is remarkably improved, and the rigidity-impact resistance balance is excellent. Therefore, the interior and exterior materials of vehicles such as automobiles and packaging of electrical products, etc. It is useful as various industrial materials including packing materials, and has high industrial applicability.

It is a figure of the description of the base line of a chromatogram in GPC, and an area. It is a plot figure which shows an example of the extensional viscosity measured with the uniaxial extensional viscometer. It is a plot of the rigidity-impact resistance (Charpy impact strength) of the Example and comparative example of this invention.

Claims (9)

A resin composition comprising 50.0 to 99.9% by weight of a propylene-ethylene copolymer component (Z) and 0.1 to 50.0% by weight of a propylene-ethylene copolymer component (M). ,
The propylene-ethylene copolymer component (Z) is obtained by sequentially producing a crystalline propylene polymer component and a propylene-ethylene random copolymer component by a multistage polymerization method using a Ziegler-Natta catalyst. And has the following property (Z1):
The propylene-ethylene copolymer component (M) is obtained by sequentially producing a crystalline propylene polymer component and a propylene-ethylene random copolymer component by a multistage polymerization method, and is insoluble in 25 ° C. paraxylene. A copolymer comprising a component (A) and an amorphous component (B) dissolved in paraxylene at 25 ° C., wherein the crystalline propylene polymer component and the propylene-ethylene random copolymer component are chemically bonded. A resin composition comprising a polymer and having the following properties (A1), (B1) and (B2):
(Z1): The component (CXS-Z) of component (Z) dissolved in 25 ° C. paraxylene is 5 to 50% by weight based on the total amount of component (Z), and the component insoluble in 25 ° C. paraxylene (CXIS -Z) amount is 50 to 95% by weight relative to the total amount of component (Z).
(A1): The amount of component (A) is 20 to 95% by weight based on the total amount of component (M).
(B1): The amount of component (B) is 5 to 80% by weight based on the total amount of component (M).
(B2): The ethylene content of the component (B) is 10% by weight or more and less than 40% by weight.   The chemical bonding mode of the crystalline propylene polymer component and the propylene-ethylene random copolymer component of the component (M) is that the propylene-ethylene random copolymer component is the main chain, and the crystalline propylene polymer component is the side chain. The resin composition according to claim 1, wherein the resin composition is a graft copolymer.   The resin composition according to claim 1 or 2, wherein the degree of strain hardening (λmax) in the measurement of the extensional viscosity of the component (M) is 2.0 or more.   Content of the said component (B) is 0.2-10 weight% with respect to the composition whole quantity, The resin composition of Claim 1 characterized by the above-mentioned. A resin composition comprising 50.0 to 99.9% by weight of a propylene-ethylene copolymer component (Z) and 0.1 to 50.0% by weight of a propylene-ethylene copolymer component (M). ,
The propylene-ethylene copolymer component (Z) is obtained by sequentially producing a crystalline propylene polymer component and a propylene-ethylene random copolymer component by a multistage polymerization method using a Ziegler-Natta catalyst. And has the following property (Z1):
Propylene-ethylene copolymer component (M) is a crystalline propylene polymer component (S) produced sequentially by a multistage polymerization method, insoluble in 25 ° C. paraxylene and satisfying the following characteristics (A1) to (A4): A) and an amorphous propylene-ethylene random copolymer component (B) that is dissolved in paraxylene at 25 ° C. and satisfies the following characteristics (B1) to (B4), and the following (M1) to (M3) A resin composition characterized by satisfying the following characteristics:
(Z1): The component (CXS-Z) of component (Z) dissolved in 25 ° C. paraxylene is 5 to 50% by weight based on the total amount of component (Z), and the component insoluble in 25 ° C. paraxylene (CXIS -Z) amount is 50 to 95% by weight relative to the total amount of component (Z).
(M1): The weight average molecular weight (Mw) measured by GPC of a component (M) is 100,000-1 million.
(M2): The amount of the component (M) insoluble in hot paraxylene is 0.3% by weight or less based on the total amount of the component (M).
(M3): The strain hardening degree (λmax) in the measurement of the extensional viscosity of the component (M) is 2.0 or more.
(A1): The amount of component (A) is 20 to 95% by weight based on the total amount of component (M).
(A2): The weight average molecular weight (Mw) measured by GPC of a component (A) is 100,000-1 million.
(A3): Isotactic triad fraction (mm) measured by ¹³ C-NMR of component (A) is 93% or more.
(A4): The strain hardening degree (λmax) in the measurement of the extensional viscosity of the component (A) is 2.0 or more.
(B1): The amount of component (B) is 5 to 80% by weight based on the total amount of component (M).
(B2): The ethylene content of the component (B) is 10% by weight or more and less than 40% by weight.
(B3): The weight average molecular weight (Mw) measured by GPC of a component (B) is 100,000-1 million.
(B4): The strain hardening degree (λmax) in the measurement of the extensional viscosity of the component (B) is 2.0 or more.   6. The resin composition according to claim 5, wherein the content of the component (B) is 0.2 to 10% by weight based on the total amount of the composition. The component (M) uses the following catalyst components (a), (b) and (c),
(I) first step of polymerizing propylene alone, or propylene and ethylene or α-olefin, and polymerizing ethylene or α-olefin with respect to all monomer components in an amount of 0 to 10% by weight; and (ii) propylene and ethylene Or a second step in which α-olefin is polymerized and ethylene or α-olefin is polymerized in an amount of 10 to 90% by weight based on the total monomer components;
The resin composition according to claim 1, wherein the resin composition is produced by the following process.
(A): Metallocene compound represented by the general formula (1)

[In General Formula (1), each of R ¹¹ and R ¹² independently represents hydrogen, an alkyl group having 1 to 6 carbon atoms, a halogen-containing alkyl group having 1 to 6 carbon atoms, or silicon containing 1 to 6 carbon atoms. Represents an alkyl group, an aryl group having 6 to 16 carbon atoms, a halogen-containing aryl group having 6 to 16 carbon atoms, a nitrogen or oxygen having 4 to 16 carbon atoms, and a heterocyclic group containing sulfur, and at least one of R ¹¹ and R ¹² One shows a heterocyclic group containing nitrogen, oxygen or sulfur having 4 to 16 carbon atoms. Each of R ¹³ and R ¹⁴ is independently an alkyl group having 1 to 6 carbon atoms, a halogen-containing alkyl group having 1 to 6 carbon atoms, a silicon-containing alkyl group having 1 to 6 carbon atoms, or 6 to 16 carbon atoms. An aryl group of 6 to 16 carbon atoms, a halogen-containing aryl group having 6 to 16 carbon atoms, a silicon-containing aryl group having 6 to 16 carbon atoms, a nitrogen or oxygen having 6 to 16 carbon atoms, and a heterocyclic group containing sulfur. X ¹¹ and Y ¹¹ are each independently a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms, a silicon-containing hydrocarbon group having 1 to 20 carbon atoms, or a halogenated group having 1 to 20 carbon atoms. Represents a hydrocarbon group, an oxygen-containing hydrocarbon group having 1 to 20 carbon atoms, an amino group, or a nitrogen-containing hydrocarbon group having 1 to 20 carbon atoms, Q ¹¹ is a divalent hydrocarbon group having 1 to 20 carbon atoms, It represents a silylene group, an oligosilylene group, or a germylene group which may have a hydrocarbon group having 1 to 20 carbon atoms. ]
(B): Ion exchange layered silicate (c): Organoaluminum compound   It contains 0 to 70 parts by weight of an ethylene / α-olefin elastomer or styrene elastomer and 0 to 70 parts by weight of an inorganic filler with respect to 100 parts by weight of the resin composition according to claim 1 or 5. A resin composition.   A material for improving impact resistance of propylene-ethylene copolymer obtained by sequentially producing a crystalline propylene polymer component and a propylene-ethylene random copolymer component by a multistage polymerization method using a Ziegler-Natta catalyst. The method using the propylene-ethylene copolymer (M) according to claim 1 or 5.

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