Title of the invention: olefin polymer and method for producing olefin polymer Technical field [0001] 　The present invention provides a novel olefin polymer and a method for producing an olefin polymer. Background technology [0002] 　Polypropylene-based resin compositions are the most important plastic materials because they are lightweight and have excellent moldability, as well as excellent chemical stability such as heat resistance and chemical resistance of the molded product, and are also extremely excellent in terms of cost performance. It is used in many fields as one of the above. For example, polypropylene having high stereoregularity is being studied for application to various uses because it has excellent mechanical strength and thermal properties. [0003] 　In order to further expand the applications, propylene-based polymers such as polypropylene and propylene-based block copolymers, which are excellent in moldability and have high rigidity and can be used as a substitute for polystyrene and ABS resin, have been desired. [0004] 　In order to improve moldability, in addition to a polymer having excellent melt flowability (MFR), a polymer having excellent linear viscoelasticity showing high complex viscosity at low angle frequencies and low complex viscosity at high angle frequencies is preferable. It is widely known that, for example, a polymer having a wide molecular weight distribution is suitable as a suitable polymer. 　On the other hand, in order for the polypropylene molded product to have high rigidity, it is widely known that a highly stereoregular polymer having a small amount of soluble components in xylene is preferable. [0005] 　As a method for expanding the molecular weight distribution to obtain polypropylene having good moldability, for example, Patent Document 1 (Japanese Patent Laid-Open No. 2000-017019) and Patent Document 2 (Japanese Patent Laid-Open No. 2016-527327) describe a plurality of polymerization reactions. A method of performing multistage polymerization using a vessel has been proposed. By such a polymerization method, the molecular weight distribution (Mw / Mn) and the complex viscosity η * at 0.05 radians / second and the complex at 300 radians / second Although a polymer having a large ratio to the viscosity η * has been obtained, it cannot be said that it has high rigidity due to the large amount of xylene-soluble components. [0006] 　Further, Patent Document 3 (Japanese Patent Laid-Open No. 2005-256002) proposes a method of mixing or using two or more kinds of catalysts in combination to obtain a polymer having a wide molecular weight distribution. The resulting polymer has a wide apparent molecular weight distribution, but has a low melting point, low rigidity, and poor heat resistance. [0007] 　Further, in Patent Document 4 (Japanese Unexamined Patent Publication No. 10-13280) and Patent Document 5 (Japanese Unexamined Patent Publication No. 2007-326887), there is also a method of obtaining a polymer having a wide molecular weight distribution by using a specific silicon compound at the time of polymerization. Although it has been proposed, in this case as well, while the molecular weight distribution of the obtained polymer is widened, there is a problem that the xylene-soluble component increases and the rigidity decreases. [0008] 　Patent Document 6 (US Patent Application Publication No. 2003/01/49196) describes a catalyst system containing a titanium-containing component supported by magnesium halide at a specific injection position of a polymerization reactor stream, tetraethoxysilane, and the like. A method of injecting a first external electron donor and a second electron donor such as dicyclopentyldimethoxysilane, which has higher stereoregularity than the first external electron donor, has been proposed. According to such a method, it is said that a polymer having a wide molecular weight distribution and a high MFR and a high stereoregularity can be produced, but there is still room for further improvement. Prior art literature Patent documents [0009] Patent Document 1: Japanese Patent Application Laid-Open No. 2000-017019 Patent Document 2: Japanese Patent Application Laid-Open No. 2016-527327 Patent Document 3: Japanese Patent Application Laid-Open No. 2005-256002 Patent Document 4: Japanese Patent Application Laid-Open No. 10-130280 Patent Document 5: Japanese Patent Application Laid-Open No. Japanese Patent Application Laid-Open No. 2007-3268787: US Patent Application Publication No. 2003/01/49196 Outline of the invention Problems to be solved by the invention [0010] 　As described above, the conventionally known method has a wide molecular weight distribution having a high melt flow property (MFR), which is an index of moldability, and a large complex viscosity ratio, and a xylene-soluble component (XS), which is an index of high rigidity. ) Was low, and propylene-based polymers such as polypropylene and propylene-based block copolymers that could satisfy all the characteristics were not obtained. 　Under such circumstances, the present invention provides a novel olefin polymer having excellent lightness, excellent moldability, high rigidity, and excellent bending elasticity of the molded product, and a method for producing the olefin polymer. It is intended to be provided. Means to solve problems [0011] 　In such a situation, as a result of diligent studies by the present inventors, at least a solid catalyst component for olefin polymerization containing a titanium atom, a magnesium atom, a halogen atom and an internal electron donating compound, selected from the general formula (I). A propylene initial polymer in the presence of an olefin polymerization catalyst which is a contact reaction product of one organic aluminum compound and a first external electron donating compound, the olefin polymerization catalyst, and the first external electron donation. A novel olefin polymer having a polypropylene portion composed of a polymer with propylene in the presence of a second external electron donating compound having a higher adsorption property to the surface of the solid catalyst component for olefin polymerization than a sex compound. It has been found that the above technical problems can be solved by manufacturing by a manufacturing method, and the present invention has been completed based on this finding. [0012] 　That is, the present invention relates to (1) a solid catalyst component for olefin polymerization containing a titanium atom, a magnesium atom, a halogen atom and an internal electron donating compound, the following 　general formula (I); 　R 1 p AlQ 3-p 　(I). (wherein, R 1 is an alkyl group having 1 to 6 carbon atoms, Q is a hydrogen atom or a halogen atom, p is a real number of 0

Copolymerization activity per 1 g of solid catalyst component per 1 hour (1 h) during formation of propylene-based block copolymer (ICP activity) was calculated by the following formula and used as a copolymerization stage polymerization activity (g-ICP / (g-catalyst · h)). Ethylene-propylene block copolymerization (ICP) activity (g-ICP / ( g-catalyst · h)) = ((I (g) -G (g)) / (mass (g) · h of solid catalyst component contained in olefin polymerization catalyst)) Here, I is a copolymerization reaction. The autoclave mass (g) after completion and G are the autoclave mass (g) after completion of homopolypolypolymerization and removal of unreacted monomers. [0131] The block ratio of the obtained propylene-based block copolymer was calculated by the following formula. Block ratio (mass%) = {(I (g) -G (g)) / (I (g) -F (g))} x 100 where I is the autoclave mass (g) after completion of the copolymerization reaction. , G is the autoclave mass (g) after the unreacted monomer is removed after the completion of homopolypropylene polymerization, and F is the autoclave mass (g). [0132] 5.0 g of a propylene-based block copolymer (ICPpropylene polymer) and 250 ml of p-xylene are charged into a flask equipped with a stirrer. By setting the external temperature to be equal to or higher than the boiling point of xylene (about 150 ° C.), the block polymer was dissolved over 2 hours while maintaining the temperature of p-xylene inside the flask below the boiling point (137 to 138 ° C.). .. After that, the liquid temperature was cooled to 23 ° C. over 1 hour, and the insoluble component and the dissolved component were filtered and separated. A solution of the above dissolved components was collected, p-xylene was distilled off by heating under reduced pressure, the mass of the obtained residue was determined, and the relative ratio (mass%) to the produced polymer (propylene-based block copolymer) Was calculated and used as XS (xylene-soluble content) in the ICP polymer. [0133] (Measurement of ultimate viscosity (dl / g)) For the ultimate viscosity (η), a propylene-based block copolymer was dissolved in decalin at 135 ° C. using a Ubbelohde viscometer, and the concentrations were 0.1 and 0.2. The reduced viscosities were measured for the three dissolved samples of 0.5 g / dl, and then the reduced viscosities were plotted against the concentration and the ultimate viscosity was determined by an extrapolation method in which the concentration was extrapolated to zero. [0134] 5.0 g of propylene-based block copolymer and 250 ml of p-xylene are charged in a flask equipped with a stirrer. By setting the external temperature to be equal to or higher than the boiling point of xylene (about 150 ° C.), the block polymer is dissolved over 2 hours while maintaining the temperature of p-xylene inside the flask below the boiling point (137 to 138 ° C.). did. After that, the liquid temperature was cooled to 23 ° C. over 1 hour, and the insoluble component and the dissolved component were filtered and separated. A small amount of the above dissolved component (EPR part obtained by extracting xylene) was sampled, formed into a film by hot pressing, and then using the following device with an IR measuring device, both ethylene and propylene were determined from the absorbance and the thickness of the film. The ethylene content ratio in the polymer (EPR) (ethylene content in EPR (C 2 in EPR), mass%) was calculated. Measurement model: Avatar measured by Thermonicolet Wavelength: 720 cm -1 , 1150 cm -1 Film thickness: 0.15 (mm) Ethylene content in EPR (% by mass) = -36.437 x log (D1150 / D720) +31.919 ( However, D720 is the absorbance at the measurement wavelength of 720 cm -1 , and D1150 is the measurement wavelength of 1150 cm -1.It is the absorbance in. ) [0135] A small amount of the xylene insoluble component is sampled, formed into a film by hot pressing, and then by the same method as the method for measuring the ethylene content in EPR. , The ethylene content (C 2 in XI) in the xylene insoluble component was calculated. [0136] IRGANOX 1010 (manufactured by BASF) 0.10% by weight, IRGAFOS 168 (manufactured by BASF) 0.10% by weight, and calcium stearate 0.08% by weight with respect to the obtained propylene copolymer. Was kneaded and granulated with a uniaxial extruder to obtain a pellet-shaped propylene-based copolymer. Next, the pellet-shaped copolymer was introduced into an injection molding machine maintained at a mold temperature of 60 ° C. and a cylinder temperature of 230 ° C., and a test piece for measuring physical properties was injection-molded by injection molding. After molding the test piece, the state was adjusted for 144 hours or more in a thermostatic chamber adjusted to 23 ° C., and then an IZOD tester (manufactured by Toyo Seiki Seisakusho Co., Ltd., Izod impact tester model number A-1218044405) was used. , JIS K7110 “Izod impact strength test method” was used to measure the Izod impact strength of the test piece at 23 ° C. and −30 ° C. Specimen shape: ISO 180 / 4A, thickness 3.2 mm, width 12.7 mm, length 63.5 mm Notch shape: Type A notch (notch radius 0.25 mm), formed with notched mold Temperature condition: 23 ℃ and -30 ℃ Impact rate: 3.5m / s Nominal pendulum energy: 5.5J when measuring at 23 ℃, 2.75J when measuring at -30 ℃ [0137] (Example 8) In 　(1) formation of a polymerization catalyst and homostage polymerization of Example 7, 0.36 mmol of dicyclopentyl was started 20 minutes after the temperature was raised to 70 ° C. after prepolymerization. Instead of adding dimethoxylan (DCPDMS), 0.36 mmol of dicyclopentyldimethoxylan (DCPDMS) was added 30 minutes after the temperature was started when the temperature was raised to 70 ° C. after prepolymerization. Was treated in the same manner as in Example 7 to obtain a propylene-based block copolymer. 　Various physical properties during the above reaction were measured in the same manner as in Example 7. The results are shown in Table 2. [0138] (Example 9) (1) Formation of polymerization catalyst and homostage polymerization In 　an autoclave with a stirrer having an internal volume of 2.0 liters completely replaced with nitrogen gas, 2.4 mmol of triethylaluminum and normal propyltriethoxylan (nPTES) were placed. ) 0.24 mmol and 0.0026 mmol of the solid catalyst component obtained in Example 1 were charged as titanium atoms to form a polymerization catalyst. 　Next, 2.8 liters of hydrogen gas and 1.4 liters of liquefied propylene were further charged into the autoclave, prepolymerized at 20 ° C. for 5 minutes, and then heated to 70 ° C. within 7 minutes. Thirty minutes after the start of temperature rise, 0.36 mmol of dicyclopentyldimethoxylan (DCPDMS) was added, and then a polymerization reaction (homostage polymerization reaction) was carried out for 10 minutes to obtain a polymer (homopolypropylene). After the completion of the homostage polymerization reaction, the monomer is purged while lowering the temperature of the reactor to room temperature, and then the mass of the entire autoclave is weighed. The amount of polymerization was determined. 　In the same manner as in Example 1, the polymerization activity per 1 g of the solid catalyst component was determined, and the melt flow property (MFR) of the obtained polymer was determined. The results are shown in Table 2. (2) Production of propylene-based block copolymer Next, hydrogen / propylene / ethylene was charged into the autoclave from the monomer supply line so that the molar ratio was 4/107/71, respectively, and then the temperature was raised to 70 ° C. to obtain hydrogen / propylene / ethylene. The reaction was carried out under the conditions of 1.2 MPa and 70 ° C. while introducing so that the ratio of liter / min was 0.09 / 2.4 / 1.6, respectively, and the reaction was stopped when the blocking ratio was about 20% by mass. By doing so, a propylene-based block copolymer was obtained. 　Various physical properties during the above reaction were measured in the same manner as in Example 7. The results are shown in Table 2. [0139] (Comparative Example 12) In 　Example 7, 2.8 liters was added instead of 3.2 liters of hydrogen gas in the homostage polymerization, dicyclopentyldimethoxylane (DCPDMS) was not added during the polymerization, and 40 from the start of temperature rise. A propylene-based block copolymer was obtained by the same treatment as in Example 7 except that the polymerization reaction (homostage polymerization reaction) was carried out for a minute. 　Various physical properties during the above reaction were measured in the same manner as in Example 7. The results are shown in Table 2. [0140] (Comparative Example 13) In 　Example 7, 9.0 liters were added instead of 3.2 liters of hydrogen gas in the homostage polymerization, and dicyclopentyldimethoxysilane (DCPDMS) was added instead of 0.24 mmol of diethylaminotriethoxysilane (DEATES). ) 0.24 mmol is added, dicyclopentyldimethoxylane (DCPDMS) is not added during the polymerization, and the polymerization reaction (homostage polymerization reaction) is carried out for 40 minutes from the start of the temperature rise, which is the same as in Example 7. To obtain a propylene-based block copolymer. 　Various physical properties during the above reaction were measured in the same manner as in Example 7. The results are shown in Table 2. [0141] (Comparative Example 14) In 　Example 7, 2.4 liters were added instead of 3.2 liters of hydrogen gas in the homostage polymerization, and normal propyltriethoxylan (normal propyltriethoxylan) was added instead of 0.24 mmol of diethylaminotriethoxysilane (DEATES). Example 7 and Example 7 except that 0.24 mmol of nPTES) was added, dicyclopentyldimethoxylane (DCPDMS) was not added during the polymerization, and the polymerization reaction (homostage polymerization reaction) was carried out for 40 minutes from the start of temperature rise. The same treatment was performed to obtain a propylene-based block copolymer. 　Various physical properties during the above reaction were measured in the same manner as in Example 7. The results are shown in Table 2. [0142] (Example 10) (1) Formation of polymerization catalyst and homostage polymerization In 　an autoclave with a stirrer having an internal volume of 2.0 liters completely replaced with nitrogen gas, 2.4 mmol of triethylaluminum and dicyclopentyldi (ethylamino) were added. 0.24 mmol of silane (DCPDEAS) and 0.0026 mmol of the solid catalyst component obtained in Example 1 were charged as titanium atoms to form a polymerization catalyst. 　Next, 5.3 liters of hydrogen gas and 1.4 liters of liquefied propylene were further charged into the autoclave, prepolymerized at 20 ° C. for 5 minutes, and then heated to 70 ° C. within 7 minutes. Thirty minutes after the start of temperature rise, 0.36 mmol of dicyclopentyldimethoxylan (DCPDMS) was added, and then a polymerization reaction (homostage polymerization reaction) was carried out for 10 minutes to obtain a polymer (homopolypropylene). After the completion of the homostage polymerization reaction, the monomer is purged while lowering the temperature of the reactor to room temperature, and then the mass of the entire autoclave is weighed. The amount of polymerization was determined. 　In the same manner as in Example 1, the polymerization activity per 1 g of the solid catalyst component was determined, and the melt flow property (MFR) of the obtained polymer was determined. The results are shown in Table 2. (2) Production of propylene-based block copolymer Next, hydrogen / propylene / ethylene was charged into the autoclave from the monomer supply line so that the molar ratio was 4/107/71, respectively, and then the temperature was raised to 70 ° C. to obtain hydrogen / propylene / ethylene. The reaction was carried out under the conditions of 1.2 MPa and 70 ° C. while introducing so that the ratio of liter / min was 0.09 / 2.4 / 1.6, respectively, and the reaction was stopped when the blocking ratio was about 20% by mass. By doing so, a propylene-based block copolymer was obtained. 　Various physical properties during the above reaction were measured in the same manner as in Example 7. The results are shown in Table 2. [0143] (Example 11) In Example 10, 4.2 liters were added instead of 5.3 liters of hydrogen gas in the homostage polymerization, and cyclohexylmethyl was added instead of 0.24 mmol of dicyclopentyldi (ethylamino) silane (DCPDEAS). A propylene block copolymer was obtained by the same treatment as in Example 7, except that 0.24 mmol of di (ethylamino) silane (CHMDEAS) was added. 　Various physical properties during the above reaction were measured in the same manner as in Example 7. The results are shown in Table 2. [0144] (Comparative Example 15) In 　Example 10, 1.9 liters were added instead of 5.3 liters of hydrogen gas in the homostage polymerization, and dicyclopentyldimethoxylane (DCPDMS) was not added during the polymerization, and 40 from the start of temperature rise. A propylene-based block copolymer was obtained by the same treatment as in Example 10 except that the polymerization reaction (homostage polymerization reaction) was carried out for a minute. 　Various physical properties during the above reaction were measured in the same manner as in Example 7. The results are shown in Table 2. [0145] (Comparative Example 16) In 　Example 10, 1.6 liters was added instead of 5.3 liters of hydrogen gas in the homostage polymerization, and cyclohexylmethyl was added instead of 0.24 mmol of dicyclopentyldi (ethylamino) silane (DCPDEAS). 0.24 mmol of di (ethylamino) silane (CHMDEAS) was added, and dicyclopentyldimethoxylane (DCPDMS) was not added during the polymerization, and the polymerization reaction (homostage polymerization reaction) was carried out for 40 minutes from the start of heating. Except for this, the same treatment as in Example 10 was carried out to obtain a propylene-based block copolymer. 　Various physical properties during the above reaction were measured in the same manner as in Example 7. The results are shown in Table 2. [0146] (Table 2) [0147] 　From Tables 1 and 2, the polypropylene and propylene-based block copolymers obtained in Examples 1 to 9 are solid catalysts for olefin polymerization containing titanium atoms, magnesium atoms, halogen atoms and internal electron donating compounds. A propylene initial polymer in the presence of an olefin polymerization catalyst which is a contact reaction product of a component, a specific organic aluminum compound and a first external electron donating compound, the olefin polymerization catalyst and the first external electron. It has a polypropylene part made of a polymer of propylene in the presence of a second external electron donating compound, which has a higher adsorption property to the surface of the solid catalyst component for olefin polymerization than the donor compound (a). ) Melt flow rate is 10 g / 10 min to 100 g / 10 min, (b) the content ratio of xylene-soluble component is 3.0% by mass or less, and (c) angular frequency 0.03 under the temperature condition of 210 ° C. The ratio of the complex viscosity η * at an angular frequency of 300 radians / second under the temperature condition of 210 ° C. to the complex viscosity η * at radians / second is 8.5 or more, and the melt flow property (MFR) is high. Since the complex viscosity ratio is high and the molecular weight distribution Mw / Mn is wide, the moldability is excellent, and since the xylene-soluble component (XS) is low, it can be seen that the bending elastic coefficient FM is high and the rigidity is high. [0148] 　On the other hand, from Table 1, in Comparative Examples 1 to 11, during the polymerization, a second external electron donating compound having a higher adsorption property to the surface of the solid catalyst component than the first external electron donating compound was reacted. Since the active sites formed in the first external electron donating compound and the second external electron donating compound cannot be effectively expressed in the same polymerization because they are not added to the system, the obtained polymer is obtained. The complex viscosity ratio of is less than 8.5, and it can be seen that a polymer (polymer mixture) exhibiting the desired linear viscoelasticity has not been obtained. 　Further, from Table 2, since the bending elastic modulus FM is low in Comparative Examples 12 to 16 as shown in Table 1, the propylene-based block copolymers are also compared with Examples 8 to 11. It turns out to be low. Industrial applicability [0149] 　According to the present invention, it is possible to provide a novel olefin polymer having excellent lightness, excellent moldability, high rigidity and excellent bending elasticity of a molded product, and to easily produce such an olefin polymer. A method can be provided. The scope of the claims [Claim 1] 　Solid catalyst component for olefin polymerization containing titanium atom, magnesium atom, halogen atom and internal electron donating compound, the following 　general formula (I); 　R 1 p AlQ 3-p 　(I) (in the formula, R 1 is the number of carbon atoms. 1-6 alkyl group, Q is hydrogen atom or a halogen atom, p is a real number of 0