Propylene resin composition and molded article

Abstract

Provided is a propylene resin composition from which molded articles having excellent impact strength can be produced. [Solution] The propylene resin composition contains recycled propylene resin composition A derived from pillars, recycled propylene resin composition B derived from a washer tank, and recycled propylene resin composition C derived from a bumper, in which the propylene resin composition contains a total of 100% by weight of resin composition A, resin composition B, and resin composition C relative to the total weight of the propylene resin composition, and contains 25% by weight to 75% by weight of resin composition A, 10% by weight to 75% by weight of resin composition B, and 0% by weight to 65% by weight of resin composition C.

Description

[Technical field]

[0001] The present invention relates to a propylene resin composition and a molded article. [Background technology]

[0002] Molded articles made of propylene resin compositions are used as materials for automobiles, home appliances, and the like. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2005-139421 A Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, molded articles used in automotive materials and the like are required to have high IZOD impact strength.

[0005] Therefore, an object of the present invention is to provide a propylene resin composition capable of producing a molded article having excellent IZOD impact strength. Another object of the present invention is to provide a molded article having excellent IZOD impact strength. [Means for solving the problem]

[0006] The present invention relates to, but is not limited to, the following: [Invention A1] A recycled propylene resin composition A derived from pillars, Recycled propylene resin composition B derived from washer tanks A propylene resin composition comprising: [Invention A2] The propylene resin composition according to Invention A1, wherein the pillar is an automobile pillar. [Invention A3] The propylene resin composition according to Invention A1 or A2, wherein the washer tank is a washer tank for an automobile. [Invention A4] The propylene resin composition according to any one of Inventions A1 to A3, wherein the recycled propylene resin composition A contains a propylene homopolymer. [Invention A5] The propylene resin composition according to any one of Inventions A1 to A4, wherein the recycled propylene resin composition B contains a propylene homopolymer. [Invention A6] The propylene resin composition according to any one of Inventions A1 to A5, wherein the recycled propylene resin composition A contains a heterophasic propylene polymerization material. [Invention A7] The propylene resin composition according to any one of Inventions A1 to A6, wherein the recycled propylene resin composition B contains a heterophasic propylene polymerization material. [Invention A8] The propylene resin composition according to any one of Inventions A1 to A7, wherein the recycled propylene resin composition A contains an ethylene-α-olefin copolymer. [Invention A9] The propylene resin composition according to any one of Inventions A1 to A8, wherein the recycled propylene resin composition B contains an ethylene-α-olefin copolymer. [Invention A10] The propylene resin composition according to any one of Inventions A1 to A9, wherein the recycled propylene resin composition A contains an inorganic filler. [Invention A11] The propylene resin composition according to any one of Inventions A1 to A10, wherein the recycled propylene resin composition B contains an inorganic filler. [Invention A12] 10 parts by weight to 90 parts by weight of a recycled propylene resin composition A; 10 parts by weight to 90 parts by weight of recycled propylene resin composition B; The propylene resin composition according to any one of Inventions A1 to A11, comprising: [Invention A13] The propylene resin composition according to any one of Inventions A1 to A12, comprising a recycled propylene resin composition C derived from bumpers. [Invention A14] The propylene resin composition according to Invention A13, wherein the bumper is an automobile bumper. [Invention A15] The propylene resin composition according to Invention A13 or A14, wherein the recycled propylene resin composition C contains a propylene homopolymer. [Invention A16] The propylene resin composition according to any one of Inventions A13 to A15, wherein the recycled propylene resin composition C contains a heterophasic propylene polymerization material. [Invention A17] The propylene resin composition according to any one of Inventions A13 to A16, wherein the recycled propylene resin composition C contains an ethylene-α-olefin copolymer. [Invention A18] The propylene resin composition according to any one of Inventions A13 to A17, wherein the recycled propylene resin composition C contains an inorganic filler. [Invention A19] 10 parts by weight to 90 parts by weight of a recycled propylene resin composition A; 10 parts by weight to 90 parts by weight of recycled propylene resin composition B; 10 parts by weight to 90 parts by weight of a recycled propylene resin composition C; The propylene resin composition according to any one of Inventions A13 to A18, comprising: [Invention A20] The propylene resin composition according to any one of Inventions A1 to A19, which contains an ethylene-α-olefin copolymer D. [Invention A21] The propylene resin composition according to any one of Inventions A1 to A20, which contains virgin propylene polymer F. [Invention A22] The propylene resin composition according to any one of Inventions A1 to A21, which contains a filler G. [Invention A23] The propylene resin composition according to invention A22, comprising an inorganic filler as filler G. [Invention A24] The propylene resin composition according to invention A22 or A23, comprising a recycled filler as filler G. [Invention A25] IZOD impact strength measured at -30℃ is 4.2kJ / m 2 The propylene resin composition according to any one of Inventions A1 to A24. [Invention A26] IZOD impact strength measured at 23°C is 20 kJ / m 2 The propylene resin composition according to any one of Inventions A1 to A25. [Invention A27] A molded article comprising the propylene resin composition according to any one of Inventions A1 to A26.

[0007] Other aspects of the present invention relate to, but are not limited to, the following. [Invention B1] A recycled propylene resin composition A derived from pillars, Recycled propylene resin composition B derived from washer tanks A propylene resin composition comprising: Resin composition A has a melt flow rate of 20 g / 10 min or more and 40 g / 10 min or less at a temperature of 230° C. and a load of 2.16 kgf; The weight ratio of the ash content in the resin composition A is 1% by weight or more and 10% by weight or less, The weight ratio of the xylene insoluble component (CXIS component) in the resin composition A is 73% by weight or more and 90% by weight or less, and the weight ratio of the xylene soluble component (CXS component) in the resin composition A is 10% by weight or more and 27% by weight or less, as measured by the following method; Resin composition B has a melt flow rate of 0.1 g / 10 min or more and 10 g / 10 min or less at a temperature of 230° C. and a load of 2.16 kgf; The weight ratio of the ash content in the resin composition B is 0.01% by weight or more and 5% by weight or less, The weight ratio of the xylene-insoluble component (CXIS component) in the resin composition B is 78% by weight or more and 90% by weight or less, and the weight ratio of the xylene-soluble component (CXS component) in the resin composition B is 10% by weight or more and 22% by weight or less, as measured by the following method. Propylene resin composition. <Method for measuring the weight ratio of the CXIS component and the CXS component> About 4 g of the sample is refluxed with boiling xylene for 5 hours using a cylindrical filter paper and a Soxhlet extraction tube. Next, the extract is concentrated under reduced pressure using a rotary evaporator to obtain a polymer component. About 2 g of the obtained polymer component is precisely weighed (this "weight of the polymer component" is designated as "a"), and dissolved by heating with boiling xylene for 2 hours. Then, after cooling to 20°C, it is filtered using a filter paper. The filtrate obtained by filtration is concentrated under reduced pressure using a rotary evaporator to obtain a CXS component. The obtained CXS component is precisely weighed (this "weight of the CXS component" is designated as "b"). The weight ratio of the CXIS component and the weight ratio of the CXS component in the sample are calculated by the following formula using the numerical values a and b. Weight ratio of the CXS component (% by weight) = (b / a) × 100 Weight ratio of the CXIS component (% by weight) = 100 - weight ratio of the CXS component (% by weight) [Invention B2] The propylene resin composition according to Invention B1, wherein the pillar is an automotive pillar. [Invention B3] The propylene resin composition according to Invention B1 or B2, wherein the washer tank is an automotive washer tank. [Invention B4] The propylene resin composition according to any one of Inventions B1 to B3, wherein the recycled propylene resin composition A contains a propylene homopolymer. [Invention B5] The propylene resin composition according to any one of Inventions B1 to B4, wherein the recycled propylene resin composition B contains a propylene homopolymer. [Invention B6] The propylene resin composition according to any one of Inventions B1 to B5, wherein the recycled propylene resin composition A contains an inorganic filler. [Invention B7] The propylene resin composition according to any one of Inventions B1 to B6, wherein the recycled propylene resin composition B contains an inorganic filler. [Invention B8] 5 parts by weight to 95 parts by weight of a recycled propylene resin composition A; 5 parts by weight to 95 parts by weight of recycled propylene resin composition B; The propylene resin composition according to any one of Inventions B1 to B7, comprising: [Invention B9] A propylene resin composition according to any one of Inventions B1 to B8, comprising a recycled propylene resin composition C derived from a bumper, Resin composition C has a melt flow rate of 20 g / 10 min or more and 60 g / 10 min or less at a temperature of 230° C. and a load of 2.16 kgf; The weight ratio of the ash content in the resin composition C is 10% by weight or more and 25% by weight or less, The weight ratio of the xylene insoluble component (CXIS component) in the resin composition C is 46% by weight or more and 72% by weight or less, and the weight ratio of the xylene soluble component (CXS component) in the resin composition C is 28% by weight or more and 54% by weight or less, as measured by the method described in Invention B1. Propylene resin composition. [Invention B10] The propylene resin composition according to Invention B9, wherein the bumper is an automobile bumper. [Invention B11] The propylene resin composition according to Invention B9 or B10, wherein the recycled propylene resin composition C contains a propylene homopolymer. [Invention B12] The propylene resin composition according to any one of Inventions B9 to B11, wherein the recycled propylene resin composition C contains an inorganic filler. [Invention B13] 5 parts by weight to 90 parts by weight of a recycled propylene resin composition A; 5 parts by weight to 90 parts by weight of recycled propylene resin composition B; 5 parts by weight to 90 parts by weight of a recycled propylene resin composition C; The propylene resin composition according to any one of Inventions B9 to B12, comprising: [Invention B14] The propylene resin composition according to any one of Inventions B1 to B13, which contains an ethylene-α-olefin copolymer D. [Invention B15] The propylene resin composition according to any one of Inventions B1 to B14, which contains virgin propylene polymer F. [Invention B16] The propylene resin composition according to any one of Inventions B1 to B15, which contains a filler G. [Invention B17] The propylene resin composition according to Invention B16, comprising an inorganic filler as filler G. [Invention B18] The propylene resin composition according to invention B16 or B17, comprising a recycled filler as filler G. [Invention B19] IZOD impact strength measured at -30℃ is 4.2kJ / m 2 The propylene resin composition according to any one of Inventions B1 to B18. [Invention B20] IZOD impact strength measured at 23°C is 20 kJ / m 2 The propylene resin composition according to any one of Inventions B1 to B19. [Invention B21] A molded article comprising the propylene resin composition according to any one of Inventions B1 to B20.

[0008] Other aspects of the present invention relate to, but are not limited to, the following. [Invention C1] A recycled propylene resin composition A derived from pillars, Recycled propylene resin composition B derived from washer tanks Recycled propylene resin composition C derived from bumpers A propylene resin composition comprising: Based on the total weight of the propylene resin composition, resin composition A, resin composition B, and resin composition C are contained in a total of 100% by weight, with resin composition A being contained in an amount of 25% to 75% by weight, resin composition B being contained in an amount of 10% to 75% by weight, and resin composition C being contained in an amount of 0% to 65% by weight. The melt flow rate of resin composition A at a temperature of 230 °C and a load of 2.16 kgf is 20 g / 10 min or more and 40 g / 10 min or less. The weight ratio of the ash content in resin composition A is 1% by weight or more and 10% by weight or less. The weight ratio of the xylene-insoluble component (CXIS component) in resin composition A, measured by the following method, is 73% by weight or more and 90% by weight or less, and the weight ratio of the xylene-soluble component (CXS component) in resin composition A is 10% by weight or more and 27% by weight or less. The melt flow rate of resin composition B at a temperature of 230 °C and a load of 2.16 kgf is 0.1 g / 10 min or more and 10 g / 10 min or less. The weight ratio of the ash content in resin composition B is 0.01% by weight or more and 5% by weight or less. The weight ratio of the xylene-insoluble component (CXIS component) in resin composition B, measured by the following method, is 78% by weight or more and 90% by weight or less, and the weight ratio of the xylene-soluble component (CXS component) in resin composition B is 10% by weight or more and 22% by weight or less. The melt flow rate of resin composition C at a temperature of 230 °C and a load of 2.16 kgf is 20 g / 10 min or more and 60 g / 10 min or less. The weight ratio of the ash content in resin composition C is 10% by weight or more and 25% by weight or less. The weight ratio of the xylene-insoluble component (CXIS component) in resin composition C, measured by the following method, is 46% by weight or more and 72% by weight or less, and the weight ratio of the xylene-soluble component (CXS component) in resin composition C is 28% by weight or more and 54% by weight or less. Propylene resin composition. <Method for Measuring the Weight Ratios of the CXIS Component and the CXS Component> Approximately 4 g of the sample is refluxed in boiling xylene for 5 hours using a cylindrical filter paper and a Soxhlet extraction tube. The extract is then concentrated under reduced pressure using a rotary evaporator to obtain a polymer component. Approximately 2 g of the obtained polymer component is precisely weighed (this "weight of polymer component" is designated as "a") and dissolved by heating in boiling xylene for 2 hours. It is then cooled to 20°C and filtered using filter paper. The separated filtrate is concentrated under reduced pressure using a rotary evaporator to obtain a CXS component. The obtained CXS component is precisely weighed (this "weight of CXS component" is designated as "b"). The weight ratio of the CXIS component in the sample and the weight ratio of the CXS component are calculated using the following formulas using the values ​​a and b. Weight ratio of CXS component (% by weight) = (b / a) x 100 Weight ratio of CXIS component (weight%) = 100 - Weight ratio of CXS component (weight%) [Invention C2] The propylene resin composition according to Invention C1, wherein the pillar is an automobile pillar. [Invention C3] The propylene resin composition according to Invention C1, wherein the washer tank is a washer tank for an automobile. [Invention C4] The propylene resin composition according to Invention C1, wherein the recycled propylene resin composition A comprises a propylene homopolymer. [Invention C5] The propylene resin composition according to Invention C1, wherein the recycled propylene resin composition B comprises a propylene homopolymer. [Invention C6] The propylene resin composition according to Invention C1, wherein the recycled propylene resin composition A comprises an inorganic filler. [Invention C7] The propylene resin composition according to Invention C1, wherein the recycled propylene resin composition B comprises an inorganic filler. [Invention C8] The propylene resin composition according to Invention C1, comprising 25% by weight to 65% by weight of Resin Composition C. [Invention C9] The propylene resin composition according to Invention C1, wherein the bumper is an automobile bumper. [Invention C10] The propylene resin composition according to Invention C1, wherein the recycled propylene resin composition C comprises a propylene homopolymer. [Invention C11] The propylene resin composition according to Invention C1, wherein the recycled propylene resin composition C comprises an inorganic filler. [Invention C12] The propylene resin composition according to Invention C1, comprising an ethylene-α-olefin copolymer D. [Invention C13] The propylene resin composition according to Invention C1, comprising virgin propylene polymer F. [Invention C14] The propylene resin composition according to invention C1, comprising a filler G. [Invention C15] The propylene resin composition according to invention C14, comprising as filler G an inorganic filler. [Invention C16] The propylene resin composition according to invention C14, comprising recycled fillers as filler G. [Invention C17] IZOD impact strength measured at -30℃ is 4.2kJ / m 2 The propylene resin composition according to Invention C1, as described above. [Invention C18] IZOD impact strength measured at 23°C is 20 kJ / m 2 The propylene resin composition according to Invention C1, as described above. [Invention C19] A molded article comprising the propylene resin composition according to any one of Inventions C1 to C18. Effect of the Invention

[0009] According to the present invention, it is possible to provide a molded article having excellent IZOD impact strength and a propylene resin composition which is a raw material thereof. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] definition In this specification, the term "propylene polymer" means a polymer having 50% by weight or more of monomer units derived from propylene, as will be explained in detail later. In this specification, the term "propylene resin composition" means a composition containing a propylene polymer, which will be described in detail later. As used herein, the term "α-olefin" refers to an aliphatic unsaturated hydrocarbon having an α-position carbon-carbon unsaturated double bond. In this specification, the term "C4-12 hydrocarbon group" means a hydrocarbon group having 4 to 12 carbon atoms. The same applies to other similar expressions. In this specification, the term "ethylene-α-olefin copolymer" refers to a copolymer containing monomer units derived from ethylene and monomer units derived from an α-olefin having C4 or more (meaning 4 or more carbon atoms; the same applies to other similar expressions), and substantially does not contain monomer units derived from propylene. This will be described in detail later. In this specification, the term "heterophagic propylene polymerization material" means a mixture containing a polymer I containing 80% by weight or more of monomer units derived from propylene (wherein the total weight of the polymer I is 100% by weight) and a polymer II containing monomer units derived from at least one α-olefin selected from the group consisting of ethylene and C4-12 α-olefins and monomer units derived from propylene.

[0011] The description "lower limit to upper limit" expressing a numerical range means "lower limit or more, upper limit or less", and the description "upper limit to lower limit" expresses "upper limit or less, lower limit or more". That is, these descriptions express a numerical range including the lower limit and the upper limit, but in one embodiment, one or both of the upper limit and the lower limit may be excluded, that is, "lower limit to upper limit" may express "more than the lower limit and lower limit", "lower limit or more, less than the upper limit", or "more than the lower limit and less than the upper limit". Similarly, "xx or more" may express "more than xx", and "xx or less" may express "less than xx".

[0012] Hereinafter, several embodiments of the present invention will be described in detail. However, the present invention is not limited to the following embodiments.

[0013] Propylene resin composition The "propylene resin composition" of the present invention includes a recycled propylene resin composition A derived from a pillar and a recycled propylene resin composition B derived from a washer tank. By molding such a propylene resin composition, a molded article having excellent IZOD impact strength can be produced. In addition, by using the propylene resin composition of the present invention, a molded article can be produced by a simple method such as injection molding, which is generally adopted in the manufacture of molded parts for automobiles, etc.

[0014] Each component indicated in "recycled propylene resin composition A" etc. is also referred to simply as "component A" etc.

[0015] Each component will be described below.

[0016] Pillar-derived recycled propylene resin composition A Component A is a propylene resin composition and is a recycled component derived from pillars.

[0017] In this specification, the term "recycled propylene resin composition" means a propylene resin composition that is once subjected to processing such as molding, or used for some final application, and then undergoes a recovery process and is reused. The same applies to other "recycled xxx"s.

[0018] In one embodiment, the process for preparing the recycled propylene resin composition may include any steps other than the recovery step, such as a crushing step, a refining step, a melting step, a kneading step with other substances, and a molding step into a pellet form. Examples of the refining step include washing with water, aqueous and / or oil-based chemicals, microbial treatment, magnetic separation, and gravity separation. The molded body may be, for example, an injection molded body, but is not limited thereto.

[0019] In this specification, the term "virgin propylene polymer" means a propylene polymer that has not been molded into a product such as an automobile or a part thereof and has not been used for any end use after the propylene polymer is produced by a process including a polymerization step. The same applies to other "virgin xxx" propylene polymers.

[0020] In this specification, the term "pillar" refers to a structural part that supports the roof and / or windows of a transportation device such as an automobile. An example of a transportation device is a vehicle. An example of a vehicle is a car, an automobile, a motorcycle, a trolleybus, a train, and a bicycle. In one embodiment, component A of the present invention is derived from an automobile pillar, that is, it means a propylene polymer that is reused after an automobile pillar that has been subjected to a recovery process is subjected to any process such as a crushing process or a melting process.

[0021] Component A contains a propylene polymer. The weight ratio of the propylene polymer to the total weight of component A is preferably 50% by weight or more, 60% by weight or more, 70% by weight or more, or 80% by weight or more. The weight ratio of the propylene polymer to the total weight of component A is preferably 95% by weight or less, or 90% by weight or less.

[0022] Examples of the propylene polymer contained in component A include a propylene homopolymer, a random copolymer of propylene and a monomer other than propylene, and a heterophasic propylene polymer material. The propylene resin composition of the present invention may contain only one type of component A, or may contain two or more types. From the viewpoint of the rigidity and impact resistance of the molded product, component A preferably contains at least one type selected from the group consisting of a propylene homopolymer and a heterophasic propylene polymer material.

[0023] The isotactic pentad fraction (also referred to as mmmm fraction) of the propylene polymer contained in component A is not particularly limited, but may be, for example, 1.000 or less, 0.998 or less, 0.995 or less, or 0.990 or less. The lower limit is also not particularly limited, but may be, for example, 0.900 or more, or 0.925 or more. From the viewpoint of the rigidity and dimensional stability of the molded article made of the resin composition, the lower limit is preferably 0.950 or more.

[0024] The isotactic pentad fraction means the isotactic fraction in pentad units. In other words, the isotactic pentad fraction indicates the ratio of structures in which five consecutive monomer units derived from propylene are meso-bonded when viewed in pentad units. In addition, when the target component is a copolymer, the isotactic pentad fraction refers to a value measured for the chain of monomer units derived from propylene.

[0025] In this specification, the isotactic pentad fraction is 13 This refers to the value measured by C-NMR spectroscopy. Specifically, 13 The ratio of the area of ​​the mmmm peak to the area of ​​all absorption peaks in the methyl carbon region obtained by C-NMR spectrum is defined as the isotactic pentad fraction. 13 The method for measuring the isotactic pentad fraction by C-NMR spectroscopy is described, for example, in Macromolecules, 6, 925 (1973) by A. Zambelli et al. 13 The assignment of absorption peaks obtained by C-spectrum is based on the description in Macromolecules, 8, 687 (1975).

[0026] Propylene homopolymer When component A contains a propylene homopolymer, from the viewpoints of the fluidity of the resin composition when melted and the toughness of the molded body, the intrinsic viscosity number ([η]) of the propylene homopolymer is preferably 0.10 dL / g to 2.00 dL / g, more preferably 0.50 dL / g to 1.50 dL / g, and even more preferably 0.70 dL / g to 1.40 dL / g.

[0027] In this specification, the intrinsic viscosity (unit: dL / g) is a value measured at a temperature of 135° C. using tetralin as a solvent by the following method.

[0028] Using an Ubbelohde viscometer, the reduced viscosity is measured at three concentrations: 0.1 g / dL, 0.2 g / dL, and 0.5 g / dL. The reduced viscosity is plotted against the concentration, and the intrinsic viscosity is calculated by the extrapolation method in which the concentration is extrapolated to zero. The method for calculating the intrinsic viscosity by the extrapolation method is described, for example, in "Polymer Solutions, Polymer Experiments 11" (published by Kyoritsu Publishing Co., Ltd. in 1982), page 491.

[0029] The molecular weight distribution (Mw / Mn) of the propylene homopolymer is preferably 3.0 or more, more preferably 4.0 or more. The molecular weight distribution of component A may be 30.0 or less, or may be 25.0 or less. The molecular weight distribution of component A is preferably 3.0 to 30.0, more preferably 4.0 to 25.0.

[0030] In this specification, the molecular weight distribution refers to the ratio (Mw / Mn) of the weight average molecular weight (Mw) to the number average molecular weight (Mn), calculated using the weight average molecular weight (Mw) and number average molecular weight (Mn) measured by gel permeation chromatography (GPC) under the following conditions: Equipment: Tosoh Corporation HLC-8121 GPC / HT Separation column: 3 GMHHR-H(S)HT, manufactured by Tosoh Corporation Measurement temperature: 140℃ Carrier: Orthodichlorobenzene Flow rate: 1.0mL / min Sample concentration: Approximately 1 mg / mL Sample injection volume: 400 μL Detector: Differential Refraction Calibration curve creation method: Use standard polystyrene

[0031] The propylene homopolymer that Component A may contain may be, for example, one produced by polymerizing propylene using a polymerization catalyst during the initial production.

[0032] Examples of polymerization catalysts include Ziegler-type catalysts; Ziegler-Natta-type catalysts; catalysts consisting of a compound of a transition metal of Group 4 of the periodic table having a cyclopentadienyl ring and an alkylaluminoxane; catalysts consisting of a compound of a transition metal of Group 4 of the periodic table having a cyclopentadienyl ring, a compound that reacts with the transition metal compound to form an ionic complex, and an organoaluminum compound; and catalysts modified by supporting a catalyst component (a compound of a transition metal of Group 4 of the periodic table having a cyclopentadienyl ring, a compound that forms an ionic complex, an organoaluminum compound, etc.) on inorganic particles (silica, clay minerals, etc.).

[0033] Examples of the polymerization catalyst include those described in JP-A-61-218606, JP-A-5-194685, JP-A-7-216017, JP-A-9-316147, JP-A-10-212319, and JP-A-2004-182981.

[0034] In the above initial production, a polymer obtained by prepolymerizing propylene in the presence of the above polymerization catalyst may be used as the polymerization catalyst.

[0035] Examples of polymerization methods include bulk polymerization, solution polymerization, and gas phase polymerization. Here, bulk polymerization refers to a method in which polymerization is carried out using an olefin that is liquid at the polymerization temperature as a medium, and solution polymerization refers to a method in which polymerization is carried out in an inert hydrocarbon solvent such as propane, butane, isobutane, pentane, hexane, heptane, or octane. Gas phase polymerization refers to a method in which a gaseous monomer is used as a medium and a gaseous monomer is polymerized in the medium.

[0036] Examples of the polymerization method include a batch method, a continuous method, and a combination thereof. The polymerization method may be a multi-stage method in which a plurality of polymerization reaction vessels are connected in series.

[0037] From the viewpoint of industrial and economical excellence, the polymerization method is preferably a continuous gas phase polymerization method or a bulk-gas phase polymerization method in which a bulk polymerization method and a gas phase polymerization method are continuously carried out.

[0038] Various conditions in the polymerization step (polymerization conditions such as polymerization temperature, polymerization pressure, monomer concentration, catalyst input amount, and polymerization time) may be appropriately determined depending on the molecular structure of the target polymer.

[0039] Other steps may be carried out before or after the polymerization step. For example, after the polymerization step, the polymer may be dried at a temperature equal to or lower than the melting temperature of the polymer, if necessary, in order to remove residual solvent contained in the polymer and ultralow molecular weight oligomers produced as by-products during production. Examples of the drying method include the methods described in JP-A-55-75410 and JP-A-2565753.

[0040] Random copolymer of propylene and monomers other than propylene The random copolymer of propylene and a monomer other than propylene contains a monomer unit derived from propylene and a monomer unit derived from a monomer other than propylene. When component A contains the random copolymer, the weight ratio of the monomer unit derived from a monomer other than propylene in the random copolymer is preferably 0.01% by weight to 20% by weight based on the total weight of the random copolymer.

[0041] Examples of the monomer other than propylene include ethylene and C4-12 α-olefins, preferably at least one selected from the group consisting of ethylene and C4-10 α-olefins, more preferably at least one selected from the group consisting of ethylene, 1-butene, 1-hexene and 1-octene, and even more preferably at least one selected from the group consisting of ethylene and 1-butene.

[0042] Examples of the random copolymer include propylene-ethylene random copolymer, propylene-1-butene random copolymer, propylene-1-hexene random copolymer, propylene-1-octene random copolymer, propylene-ethylene-1-butene random copolymer, propylene-ethylene-1-hexene random copolymer, and propylene-ethylene-1-octene random copolymer.

[0043] When component A contains the random copolymer, from the viewpoint of fluidity of the resin composition when melted, the intrinsic viscosity number ([η]) of the random copolymer is preferably 0.10 dL / g to 2.00 dL / g, more preferably 0.50 dL / g to 1.50 dL / g, and even more preferably 0.70 dL / g to 1.40 dL / g.

[0044] The molecular weight distribution (Mw / Mn) of the random polymer is preferably 3.0 or more, more preferably 4.0 or more. The molecular weight distribution of the random polymer may be 30.0 or less, or may be 25.0 or less. The molecular weight distribution of the random polymer is preferably 3.0 to 30.0, more preferably 4.0 to 25.0.

[0045] The random copolymer may be produced, for example, in the initial production, by polymerizing propylene and a monomer other than propylene according to a polymerization catalyst, polymerization method, polymerization scheme, and polymerization conditions that can be used in the production of the propylene homopolymer.

[0046] Heterophagic propylene polymer materials When component A contains a heterophasic propylene polymerization material, the heterophasic propylene polymerization material may be produced, for example, in the initial production by carrying out a first polymerization step of forming a polymer I and a second polymerization step of forming a polymer II. These polymerization steps can be carried out according to the polymerization catalyst, polymerization method, polymerization scheme, and polymerization conditions that can be used in the production of the propylene homopolymer. The total weight of the polymer I and the polymer II contained in the heterophasic propylene polymerization material may be 100% by weight, relative to the total weight of the heterophasic propylene polymerization material being 100% by weight.

[0047] As described above, the polymer I contains 80% by weight or more of monomer units derived from propylene. The polymer I may be, for example, a propylene homopolymer, or may contain monomer units derived from a monomer other than propylene. When the polymer I contains monomer units derived from a monomer other than propylene, the weight ratio of the monomer units derived from the monomer other than propylene to the total weight of the polymer I may be, for example, 0.01% by weight or more and less than 20% by weight.

[0048] Examples of the monomer other than propylene include ethylene and C4 or higher α-olefins, preferably at least one selected from the group consisting of ethylene and C4 to C10 α-olefins, more preferably at least one selected from the group consisting of ethylene, 1-butene, 1-hexene, and 1-octene, and even more preferably at least one selected from the group consisting of ethylene and 1-butene.

[0049] Examples of copolymers containing monomer units derived from a monomer other than propylene include propylene-ethylene copolymers, propylene-1-butene copolymers, propylene-1-hexene copolymers, propylene-1-octene copolymers, propylene-ethylene-1-butene copolymers, propylene-ethylene-1-hexene copolymers, and propylene-ethylene-1-octene copolymers.

[0050] From the viewpoint of dimensional stability of the molded article, polymer I is preferably a propylene homopolymer, a propylene-ethylene copolymer, a propylene-1-butene copolymer, or a propylene-ethylene-1-butene copolymer, and more preferably a propylene homopolymer.

[0051] The isotactic pentad fraction of the polymer I may be preferably 1.000 or less, 0.998 or less, 0.995 or less, or 0.990 or less. The lower limit is not particularly limited, but may be, for example, 0.900 or more, 0.925 or more, or 0.950 or more.

[0052] The weight ratio of polymer I to the total weight of the heterophasic propylene polymerization material is preferably 50% by weight to 99% by weight, and more preferably 60% by weight to 95% by weight.

[0053] As described above, polymer II contains monomer units derived from at least one α-olefin selected from the group consisting of ethylene and C4-12 α-olefins and monomer units derived from propylene. Preferably, polymer II contains 30% by weight or more of monomer units derived from at least one α-olefin selected from the group consisting of ethylene and C4-12 α-olefins, and also contains monomer units derived from propylene.

[0054] The weight ratio of monomer units derived from at least one α-olefin selected from the group consisting of ethylene and C4-12 α-olefins to the total weight of polymer II may be 30% by weight to 70% by weight, or may be 35% by weight to 60% by weight.

[0055] In polymer II, the at least one α-olefin selected from the group consisting of ethylene and C4 to C12 α-olefins is preferably at least one selected from the group consisting of ethylene and C4 to C10 α-olefins, more preferably at least one selected from the group consisting of ethylene, 1-butene, 1-hexene, 1-octene and 1-decene, and even more preferably at least one selected from the group consisting of ethylene and 1-butene.

[0056] Examples of the polymer II include a propylene-ethylene copolymer, a propylene-ethylene-1-butene copolymer, a propylene-ethylene-1-hexene copolymer, a propylene-ethylene-1-octene copolymer, a propylene-ethylene-1-decene copolymer, a propylene-1-butene copolymer, a propylene-1-hexene copolymer, a propylene-1-octene copolymer and a propylene-1-decene copolymer, preferably a propylene-ethylene copolymer, a propylene-1-butene copolymer, or a propylene-ethylene-1-butene copolymer, more preferably a propylene-ethylene copolymer.

[0057] The weight ratio of the polymer II to the total weight of the heterophasic propylene polymerization material is preferably 1% by weight to 50% by weight, and more preferably 5% by weight to 40% by weight.

[0058] The weight ratio of the xylene insoluble components (CXIS components) in the heterophasic propylene polymerization material to the total weight of the heterophasic propylene polymerization material is preferably 50% by weight to 99% by weight, and more preferably 60% by weight to 95% by weight.

[0059] The weight ratio of the xylene soluble component (CXS component) in the heterophasic propylene polymerization material to the total weight of the heterophasic propylene polymerization material is preferably 1 wt % to 50 wt %, and more preferably 5 wt % to 40 wt %.

[0060] In the present invention, it is considered that the CXIS component in the heterophasic propylene polymerization material is mainly composed of polymer I, and the CXS component in the heterophasic propylene polymerization material is mainly composed of polymer II.

[0061] Examples of heterophasic propylene polymeric materials include (propylene)-(propylene-ethylene) polymeric materials, (propylene)-(propylene-ethylene-1-butene) polymeric materials, (propylene)-(propylene-ethylene-1-hexene) polymeric materials, (propylene)-(propylene-ethylene-1-octene) polymeric materials, (propylene)-(propylene-1-butene) polymeric materials, (propylene)-(propylene-1-hexene) polymeric materials, (propylene)-(propylene-1-octene) polymeric materials, (propylene)-(propylene-1-decene) polymeric materials, (Propylene-ethylene)-(propylene-ethylene) polymerization material, (propylene-ethylene)-(propylene-ethylene-1-butene) polymerization material, (propylene-ethylene)-(propylene-ethylene-1-hexene) polymerization material, (propylene-ethylene)-(propylene-ethylene-1-octene) polymerization material, (propylene-ethylene)-(propylene-ethylene-1-decene) polymerization material, (propylene-ethylene)-(propylene-1-butene) polymerization material, (propylene-ethylene)-(propylene-1-hexene) polymerization material, (propylene-ethylene (propylene-1-octene) polymerization materials, (propylene-ethylene)-(propylene-1-decene) polymerization materials, (propylene-1-butene)-(propylene-ethylene) polymerization materials, (propylene-1-butene)-(propylene-ethylene-1-butene) polymerization materials, (propylene-1-butene)-(propylene-ethylene-1-hexene) polymerization materials, (propylene-1-butene)-(propylene-ethylene-1-octene) polymerization materials, (propylene-1-butene)-(propylene-ethylene-1-decene) polymerization materials, (propylene-1-butene)-(propylene-ethylene-1-decene) polymerization materials, (propylene-1-butene)-(propylene (propylene-1-butene) polymerization material, (propylene-1-butene)-(propylene-1-hexene) polymerization material, (propylene-1-butene)-(propylene-1-octene) polymerization material, (propylene-1-butene)-(propylene-1-decene) polymerization material, (propylene-1-hexene)-(propylene-1-hexene) polymerization material, (propylene-1-hexene)-(propylene-1-octene) polymerization material, (propylene-1-hexene)-(propylene-1-decene) polymerization material, (propylene-1-octene)-(propylene-1-octene) polymerization material,and (propylene-1-octene)-(propylene-1-decene) polymer materials.

[0062] Here, the expression "(propylene)-(propylene-ethylene) polymer material" means "a heterophasic propylene polymer material in which polymer I is a propylene homopolymer and polymer II is a propylene-ethylene copolymer." The same applies to other similar expressions.

[0063] The heterophasic propylene polymeric material is preferably a (propylene)-(propylene-ethylene) polymeric material, a (propylene)-(propylene-ethylene-1-butene) polymeric material, a (propylene-ethylene)-(propylene-ethylene) polymeric material, a (propylene-ethylene)-(propylene-ethylene-1-butene) polymeric material, or a (propylene-1-butene)-(propylene-1-butene) polymeric material, and more preferably a (propylene)-(propylene-ethylene) polymeric material.

[0064] The intrinsic viscosity number ([η]I) of polymer I is preferably 0.10 dL / g to 2.00 dL / g, more preferably 0.50 dL / g to 1.50 dL / g, and further preferably 0.70 dL / g to 1.40 dL / g.

[0065] The intrinsic viscosity number ([η]II) of the polymer II is preferably from 1.00 dL / g to 10.00 dL / g, more preferably from 2.00 dL / g to 10.00 dL / g, and further preferably from 2.00 dL / g to 9.00 dL / g.

[0066] The ratio ([η]II / [η]I) of the intrinsic viscosity number ([η]II) of polymer II to the intrinsic viscosity number ([η]I) of polymer I is preferably 1-20, more preferably 1-10.

[0067] An example of a method for measuring the intrinsic viscosity number ([η]I) of polymer I is a method in which polymer I formed is extracted from a reactor in which polymer I is formed, and the intrinsic viscosity number of the polymer is measured.

[0068] The intrinsic viscosity number ([η]II) of polymer II can be calculated, for example, from the intrinsic viscosity number ([η]Total) of the heterophasic propylene polymerization material, the intrinsic viscosity number ([η]I) of polymer I, and the weight ratio of polymer II and polymer I to the total weight of the heterophasic propylene polymerization material, according to the following formula (6).

[0069] [η]II=([η]Total-[η]I×XI) / XII ···(6) [η]Total: Intrinsic viscosity number of heterophasic propylene polymer material (dL / g) [η]I: Intrinsic viscosity number of polymer I (dL / g) XI: Weight ratio of polymer I to the total weight of the heterophasic propylene polymer material (weight of polymer I / weight of heterophasic propylene polymer material) XII: Weight ratio of polymer II to the total weight of the heterophasic propylene polymer material (weight of polymer II / weight of heterophasic propylene polymer material)

[0070] Here, XI and XII can be determined from the material balance during polymerization.

[0071] Incidentally, XII may be calculated by measuring the heat of fusion of the polymer I and the heat of fusion of the heterophasic propylene polymer material and using the following formula. XII = 1-(ΔHf)T / (ΔHf)P (ΔHf)T: Heat of fusion of the heterophasic propylene polymer material (J / g) (ΔHf)P: Heat of fusion of polymer I (J / g)

[0072] The intrinsic viscosity number ([η]CXIS) of the CXIS component is preferably 0.10 dL / g to 2.00 dL / g, more preferably 0.50 dL / g to 1.50 dL / g, and even more preferably 0.70 dL / g to 1.40 dL / g.

[0073] The intrinsic viscosity number ([η]CXS) of the CXS component is preferably 1.00 dL / g to 10.00 dL / g, more preferably 2.00 dL / g to 10.00 dL / g, and even more preferably 2.00 dL / g to 9.00 dL / g.

[0074] The ratio ([η]CXS / [η]CXIS) of the intrinsic viscosity number of the CXS component ([η]CXS) to the intrinsic viscosity number of the CXIS component ([η]CXIS) is preferably 1-20, and more preferably 1-10.

[0075] The molecular weight distribution (Mw(I) / Mn(I)) of Polymer I is preferably 3.0 or more, and more preferably 4.0 or more.

[0076] The molecular weight distribution of the CXIS component (Mw(CXIS) / Mn(CXIS)) is preferably 3.0 or more, and more preferably 4.0 or more.

[0077] From the viewpoint of molding processability of the resin composition, the melt flow rate (MFR) of component A at a temperature of 230° C. and a load of 2.16 kgf is preferably 5 g / 10 min or more, more preferably 10 g / 10 min or more, even more preferably 20 g / 10 min or more, and even more preferably 25 g / 10 min or more. The MFR of component A (temperature 230° C., load 2.16 kgf) is preferably 300 g / 10 min or less, more preferably 100 g / 10 min or less, even more preferably 40 g / 10 min or less, and even more preferably 60 g / 10 min or less.

[0078] In this specification, the melt flow rate refers to a value measured in accordance with JIS K7210. The melt flow rate may be hereinafter referred to as MFR. The MFR of Component A, Component B, Component C, Component D, and the propylene resin composition of the present invention is measured at 230°C.

[0079] In one aspect, Component A contains ash. The ash of Component A means the component that remains as ash after heating Component A at 600°C for 60 minutes. The weight ratio of the ash is determined by the following method. <Method for Measuring the Weight Ratio of Ash> The crucible is heated at 600°C for 60 minutes using an electric furnace, taken out of the furnace, cooled in a desiccator for 1 hour, and then weighed using an analytical balance. Weigh 10 g of the recycled propylene composition into the crucible, heat it at 600°C for 60 minutes using an electric furnace to completely incinerate it. Then, after cooling the crucible in a desiccator for 1 hour, measure the weight of the ash to the nearest 0.1 mg using an analytical balance, and calculate the weight ratio (% by weight) of the ash to Component A.

[0080] In one aspect, based on the total weight of Component A, the weight ratio of the ash is 0.1% by weight or more, or 1.0% by weight or more. In one aspect, based on the total weight of Component A, the weight ratio of the ash is 25% by weight or less, 20% by weight or less, 15% by weight or less, or 10% by weight or less.

[0081] In one aspect, Component A contains a filler described below. When Component A contains a filler, most of the filler is included in the ash of Component A. When Component A contains a filler, the weight ratio of the filler is generally considered to correspond to the weight ratio of the ash of Component A.

[0082] In one aspect, Component A may contain an ethylene-α-olefin copolymer described below.

[0083] The weight ratio of the xylene-insoluble component (CXIS component) in Component A, measured by the following method, is preferably 50% by weight or more and 99% by weight or less, more preferably 60% by weight or more and 95% by weight or less, and even more preferably 73% by weight or more and 90% by weight or less. The weight ratio of the xylene-soluble component (CXS component) in Component A is preferably 1% by weight or more and 50% by weight or less, more preferably 5% by weight or more and 40% by weight or less, and even more preferably 10% by weight or more and 27% by weight or less. <Method for Measuring the Weight Ratio of the CXIS Component and the CXS Component> About 4 g of component A is refluxed in boiling xylene for 5 hours using a cylindrical filter paper and a Soxhlet extraction tube. The extract is then concentrated under reduced pressure using a rotary evaporator to obtain a polymer component. About 2 g of the obtained polymer component is precisely weighed (this "weight of the polymer component" is designated as "a") and dissolved by heating in boiling xylene for 2 hours. It is then cooled to 20°C and filtered using filter paper. The filtered filtrate is concentrated under reduced pressure using a rotary evaporator to obtain a CXS component. The obtained CXS component is precisely weighed (this "weight of the CXS component" is designated as "b"). The weight ratio of the CXIS component in component A and the weight ratio of the CXS component are calculated using the following formula using the values ​​a and b. The CXIS component can also be obtained by vacuum drying the solid remaining on the filter paper. Weight ratio of CXS component (% by weight) = (b / a) x 100 Weight ratio of CXIS component (weight%) = 100 - Weight ratio of CXS component (weight%)

[0084] The CXIS component in component A is considered to be mainly composed of polymer I of the heterophasic propylene polymerization material contained in component A and / or a propylene homopolymer. The CXS component in component A is considered to be mainly composed of polymer II of the heterophasic propylene polymerization material contained in component A and / or an ethylene-α-olefin copolymer.

[0085] Recycled propylene resin composition B from washer tanks Component B is a propylene resin composition, which is a recycled component derived from a washer tank.

[0086] In this specification, the term "washer tank" refers to a tank for storing a liquid "washer fluid" used to wash the windshield of a vehicle such as an automobile. In one embodiment, component B of the present invention refers to a propylene resin composition derived from an automobile washer tank, i.e., an automobile washer tank that has been subjected to a recovery process is subjected to any process such as a crushing process, a melting process, and then reused.

[0087] Component B contains a propylene polymer. The weight ratio of the propylene polymer to the total weight of component B is preferably 50% by weight or more, 60% by weight or more, 70% by weight or more, or 80% by weight or more. The weight ratio of the propylene polymer to the total weight of component B is preferably 95% by weight or less, or 90% by weight or less.

[0088] Examples of the propylene polymer contained in component B include a propylene homopolymer, a random copolymer of propylene and a monomer other than propylene, and a heterophasic propylene polymer material. The propylene resin composition of the present invention may contain only one type of component B, or may contain two or more types. From the viewpoint of the rigidity and impact resistance of the molded product, component B preferably contains at least one type selected from the group consisting of a propylene homopolymer and a heterophasic propylene polymer material.

[0089] The isotactic pentad fraction (also referred to as mmmm fraction) of the propylene polymer contained in component B is not particularly limited, but may be, for example, less than 0.981, 1.000 or less, 0.998 or less, 0.995 or less, or 0.990 or less. The lower limit is also not particularly limited, but may be, for example, 0.900 or more, or 0.925 or more. From the viewpoint of rigidity and dimensional stability of a molded article made of the resin composition, the lower limit is preferably 0.950 or more.

[0090] Propylene homopolymer When component B contains a propylene homopolymer, from the viewpoints of the fluidity of the resin composition when melted and the toughness of the molded body, the intrinsic viscosity number ([η]) of the propylene homopolymer is preferably 0.10 dL / g to 3.00 dL / g, more preferably 0.50 dL / g to 2.50 dL / g, and even more preferably 0.70 dL / g to 2.00 dL / g.

[0091] The molecular weight distribution (Mw / Mn) of the propylene homopolymer is preferably 3.0 or more, more preferably 4.0 or more. The molecular weight distribution of component B may be 30.0 or less, or may be 25.0 or less. The molecular weight distribution of component B is preferably 3.0 to 30.0, more preferably 4.0 to 25.0.

[0092] The propylene homopolymer that can be contained in component B may be, for example, one produced by polymerizing propylene using a polymerization catalyst during the initial production. In the polymerization, the above-mentioned polymerization catalyst, polymerization method, polymerization mode, and polymerization conditions may be appropriately determined depending on the molecular structure of the target polymer.

[0093] Random copolymer of propylene and monomers other than propylene The random copolymer of propylene and a monomer other than propylene contains a monomer unit derived from propylene and a monomer unit derived from a monomer other than propylene. When component B contains the random copolymer, the weight ratio of the monomer unit derived from a monomer other than propylene in the random copolymer is preferably 0.01% by weight to 20% by weight based on the total weight of the random copolymer.

[0094] Examples of the monomer other than propylene include ethylene and C4-12 α-olefins, preferably at least one selected from the group consisting of ethylene and C4-10 α-olefins, more preferably at least one selected from the group consisting of ethylene, 1-butene, 1-hexene and 1-octene, and even more preferably at least one selected from the group consisting of ethylene and 1-butene.

[0095] Examples of the random copolymer include propylene-ethylene random copolymer, propylene-1-butene random copolymer, propylene-1-hexene random copolymer, propylene-1-octene random copolymer, propylene-ethylene-1-butene random copolymer, propylene-ethylene-1-hexene random copolymer, and propylene-ethylene-1-octene random copolymer.

[0096] When component B contains the random copolymer, from the viewpoint of fluidity of the resin composition when melted, the intrinsic viscosity number ([η]) of the random copolymer is preferably 0.10 dL / g to 3.00 dL / g, more preferably 0.50 dL / g to 2.50 dL / g, and even more preferably 0.70 dL / g to 2.00 dL / g.

[0097] The molecular weight distribution (Mw / Mn) of the random polymer is preferably 3.0 or more, more preferably 4.0 or more. The molecular weight distribution of the random polymer may be 30.0 or less, or may be 25.0 or less. The molecular weight distribution of the random polymer is preferably 3.0 to 30.0, more preferably 4.0 to 25.0.

[0098] The random copolymer may be produced, for example, in the initial production, by polymerizing propylene and a monomer other than propylene according to a polymerization catalyst, polymerization method, polymerization scheme, and polymerization conditions that can be used in the production of the propylene homopolymer.

[0099] Heterophagic propylene polymer materials When component B contains a heterophasic propylene polymerization material, the heterophasic propylene polymerization material may be produced, for example, by carrying out a first polymerization step of forming a polymer I and a second polymerization step of forming a polymer II in the initial production. These polymerization steps can be carried out according to the polymerization catalyst, polymerization method, polymerization scheme, and polymerization conditions that can be used in the production of the propylene homopolymer. The total weight of the polymer I and the polymer II contained in the heterophasic propylene polymerization material may be 100% by weight, relative to the total weight of the heterophasic propylene polymerization material being 100% by weight.

[0100] As described above, the polymer I contains 80% by weight or more of monomer units derived from propylene. The polymer I may be, for example, a propylene homopolymer, or may contain monomer units derived from a monomer other than propylene. When the polymer I contains monomer units derived from a monomer other than propylene, the weight ratio of the monomer units derived from the monomer other than propylene to the total weight of the polymer I may be, for example, 0.01% by weight or more and less than 20% by weight.

[0101] Examples of the monomer other than propylene include ethylene and C4 or higher α-olefins, preferably at least one selected from the group consisting of ethylene and C4 to C10 α-olefins, more preferably at least one selected from the group consisting of ethylene, 1-butene, 1-hexene, and 1-octene, and even more preferably at least one selected from the group consisting of ethylene and 1-butene.

[0102] Examples of copolymers containing monomer units derived from a monomer other than propylene include propylene-ethylene copolymers, propylene-1-butene copolymers, propylene-1-hexene copolymers, propylene-1-octene copolymers, propylene-ethylene-1-butene copolymers, propylene-ethylene-1-hexene copolymers, and propylene-ethylene-1-octene copolymers.

[0103] From the viewpoint of dimensional stability of the molded article, polymer I is preferably a propylene homopolymer, a propylene-ethylene copolymer, a propylene-1-butene copolymer, or a propylene-ethylene-1-butene copolymer, and more preferably a propylene homopolymer.

[0104] The isotactic pentad fraction of the polymer I may be preferably 1.000 or less, 0.998 or less, 0.995 or less, or 0.990 or less. The lower limit is not particularly limited, but may be, for example, 0.900 or more, 0.925 or more, or 0.950 or more.

[0105] The weight ratio of polymer I to the total weight of the heterophasic propylene polymerization material is preferably 50% by weight to 99% by weight, and more preferably 60% by weight to 95% by weight.

[0106] As described above, polymer II contains monomer units derived from at least one α-olefin selected from the group consisting of ethylene and C4-12 α-olefins and monomer units derived from propylene. Preferably, polymer II contains 30% by weight or more of monomer units derived from at least one α-olefin selected from the group consisting of ethylene and C4-12 α-olefins, and also contains monomer units derived from propylene.

[0107] The weight ratio of monomer units derived from at least one α-olefin selected from the group consisting of ethylene and C4-12 α-olefins to the total weight of polymer II may be 30% by weight to 70% by weight, or may be 35% by weight to 60% by weight.

[0108] In polymer II, the at least one α-olefin selected from the group consisting of ethylene and C4 to C12 α-olefins is preferably at least one selected from the group consisting of ethylene and C4 to C10 α-olefins, more preferably at least one selected from the group consisting of ethylene, 1-butene, 1-hexene, 1-octene and 1-decene, and even more preferably at least one selected from the group consisting of ethylene and 1-butene.

[0109] Examples of the polymer II include a propylene-ethylene copolymer, a propylene-ethylene-1-butene copolymer, a propylene-ethylene-1-hexene copolymer, a propylene-ethylene-1-octene copolymer, a propylene-ethylene-1-decene copolymer, a propylene-1-butene copolymer, a propylene-1-hexene copolymer, a propylene-1-octene copolymer and a propylene-1-decene copolymer, preferably a propylene-ethylene copolymer, a propylene-1-butene copolymer, or a propylene-ethylene-1-butene copolymer, more preferably a propylene-ethylene copolymer.

[0110] The weight ratio of the polymer II to the total weight of the heterophasic propylene polymerization material is preferably 1% by weight to 50% by weight, and more preferably 5% by weight to 40% by weight.

[0111] The weight ratio of the xylene insoluble components (CXIS components) in the heterophasic propylene polymerization material to the total weight of the heterophasic propylene polymerization material is preferably 50% by weight to 99% by weight, and more preferably 60% by weight to 95% by weight.

[0112] The weight ratio of the xylene soluble component (CXS component) in the heterophasic propylene polymerization material to the total weight of the heterophasic propylene polymerization material is preferably 1 wt % to 50 wt %, and more preferably 5 wt % to 40 wt %.

[0113] In the present invention, it is considered that the CXIS component in the heterophasic propylene polymerization material is mainly composed of polymer I, and the CXS component in the heterophasic propylene polymerization material is mainly composed of polymer II.

[0114] Examples of heterophasic propylene polymeric materials include (propylene)-(propylene-ethylene) polymeric materials, (propylene)-(propylene-ethylene-1-butene) polymeric materials, (propylene)-(propylene-ethylene-1-hexene) polymeric materials, (propylene)-(propylene-ethylene-1-octene) polymeric materials, (propylene)-(propylene-1-butene) polymeric materials, (propylene)-(propylene-1-hexene) polymeric materials, (propylene)-(propylene-1-octene) polymeric materials, (propylene)-(propylene-1-decene) polymeric materials, (Propylene-ethylene)-(propylene-ethylene) polymerization material, (propylene-ethylene)-(propylene-ethylene-1-butene) polymerization material, (propylene-ethylene)-(propylene-ethylene-1-hexene) polymerization material, (propylene-ethylene)-(propylene-ethylene-1-octene) polymerization material, (propylene-ethylene)-(propylene-ethylene-1-decene) polymerization material, (propylene-ethylene)-(propylene-1-butene) polymerization material, (propylene-ethylene)-(propylene-1-hexene) polymerization material, (propylene-ethylene (propylene-1-octene) polymerization materials, (propylene-ethylene)-(propylene-1-decene) polymerization materials, (propylene-1-butene)-(propylene-ethylene) polymerization materials, (propylene-1-butene)-(propylene-ethylene-1-butene) polymerization materials, (propylene-1-butene)-(propylene-ethylene-1-hexene) polymerization materials, (propylene-1-butene)-(propylene-ethylene-1-octene) polymerization materials, (propylene-1-butene)-(propylene-ethylene-1-decene) polymerization materials, (propylene-1-butene)-(propylene-ethylene-1-decene) polymerization materials, (propylene-1-butene)-(propylene (propylene-1-butene) polymerization material, (propylene-1-butene)-(propylene-1-hexene) polymerization material, (propylene-1-butene)-(propylene-1-octene) polymerization material, (propylene-1-butene)-(propylene-1-decene) polymerization material, (propylene-1-hexene)-(propylene-1-hexene) polymerization material, (propylene-1-hexene)-(propylene-1-octene) polymerization material, (propylene-1-hexene)-(propylene-1-decene) polymerization material, (propylene-1-octene)-(propylene-1-octene) polymerization material,and (propylene-1-octene)-(propylene-1-decene) polymer materials.

[0115] Here, the expression "(propylene)-(propylene-ethylene) polymer material" means "a heterophasic propylene polymer material in which polymer I is a propylene homopolymer and polymer II is a propylene-ethylene copolymer." The same applies to other similar expressions.

[0116] The heterophasic propylene polymeric material is preferably a (propylene)-(propylene-ethylene) polymeric material, a (propylene)-(propylene-ethylene-1-butene) polymeric material, a (propylene-ethylene)-(propylene-ethylene) polymeric material, a (propylene-ethylene)-(propylene-ethylene-1-butene) polymeric material, or a (propylene-1-butene)-(propylene-1-butene) polymeric material, and more preferably a (propylene)-(propylene-ethylene) polymeric material.

[0117] The intrinsic viscosity number ([η]I) of polymer I is preferably 0.10 dL / g to 3.00 dL / g, more preferably 0.50 dL / g to 2.50 dL / g, and further preferably 0.70 dL / g to 2.00 dL / g.

[0118] The intrinsic viscosity number ([η]II) of the polymer II is preferably from 1.00 dL / g to 10.00 dL / g, more preferably from 2.00 dL / g to 10.00 dL / g, and further preferably from 2.00 dL / g to 9.00 dL / g.

[0119] The ratio ([η]II / [η]I) of the intrinsic viscosity number ([η]II) of polymer II to the intrinsic viscosity number ([η]I) of polymer I is preferably 1-20, more preferably 1-10.

[0120] The intrinsic viscosity number ([η]I) of polymer I can be measured, for example, by the method described above for polymer I of the heterophasic propylene polymerization material as component A.

[0121] The intrinsic viscosity number ([η]II) of the polymer II can be measured, for example, by the method described above for the polymer II of the heterophasic propylene polymerization material as component A.

[0122] The intrinsic viscosity number ([η]CXIS) of the CXIS component is preferably 0.10 dL / g to 3.00 dL / g, more preferably 0.50 dL / g to 2.50 dL / g, and further preferably 0.70 dL / g to 2.00 dL / g.

[0123] The intrinsic viscosity number ([η]CXS) of the CXS component is preferably 1.00 dL / g to 10.00 dL / g, more preferably 2.00 dL / g to 10.00 dL / g, and even more preferably 2.00 dL / g to 9.00 dL / g.

[0124] The ratio ([η]CXS / [η]CXIS) of the intrinsic viscosity number of the CXS component ([η]CXS) to the intrinsic viscosity number of the CXIS component ([η]CXIS) is preferably 1-20, and more preferably 1-10.

[0125] The molecular weight distribution (Mw(I) / Mn(I)) of Polymer I is preferably 3.0 or more, and more preferably 4.0 or more.

[0126] The molecular weight distribution of the CXIS component (Mw(CXIS) / Mn(CXIS)) is preferably 3.0 or more, and more preferably 4.0 or more.

[0127] From the viewpoint of molding processability of the resin composition, the MFR of component B (temperature 230°C, load 2.16 kgf) is preferably 0.1 g / 10 min or more, more preferably 0.5 g / 10 min or more, and even more preferably 1.0 g / 10 min or more. The MFR of component B (temperature 230°C, load 2.16 kgf) is preferably 100 g / 10 min or less, more preferably 50 g / 10 min or less, even more preferably 40 g / 10 min or less, and even more preferably 10 g / 10 min or less.

[0128] In one embodiment, component B contains ash. The ash content of component B means a component remaining as ash after heating component B at 600° C. for 60 minutes. The weight ratio of the ash content can be measured by the method described above for component A.

[0129] In one embodiment, the weight ratio of the ash content is 0.01% by weight or more, or 0.1% by weight or more, based on the total weight of component B. In one embodiment, the weight ratio of the ash content is 25% by weight or less, 20% by weight or less, 15% by weight or less, or 5% by weight or less, based on the total weight of component B.

[0130] In one embodiment, component B contains a filler as described below. When component B contains a filler, the majority of the filler is contained in the ash content of component B. When component B contains a filler, the weight ratio of the filler is considered to roughly correspond to the weight ratio of the ash content of component B.

[0131] In one embodiment, Component B may include an ethylene-α-olefin copolymer as described below.

[0132] The weight ratio of the xylene insoluble component (CXIS component) in component B is preferably 50% by weight or more and 99% by weight or less, more preferably 60% by weight or more and 95% by weight or less, and even more preferably 78% by weight or more and 90% by weight or less. The weight ratio of the xylene soluble component (CXS component) in component B is preferably 1% by weight or more and 50% by weight or less, more preferably 5% by weight or more and 40% by weight or less, and even more preferably 10% by weight or more and 22% by weight or less. The weight ratios of the CXIS component and the CXS component can be measured by the method described above for component A.

[0133] The CXIS component in component B is considered to be mainly composed of polymer I of the heterophasic propylene polymerization material contained in component B and / or a propylene homopolymer. The CXS component in component B is considered to be mainly composed of polymer II of the heterophasic propylene polymerization material contained in component B and / or an ethylene-α-olefin copolymer.

[0134] Recycled propylene resin composition C made from bumpers Component C is a propylene resin composition, which is a recycled component derived from bumpers.

[0135] In this specification, the term "bumper" means a shock absorber provided on the front and rear ends or both sides of a vehicle to reduce the impact during a collision and reduce damage to the vehicle body, engine, etc., to passengers, cargo, and other vehicles. In one embodiment, component C of the present invention means a propylene polymer derived from an automobile bumper, that is, an automobile bumper subjected to a recovery process is subjected to any process such as a crushing process or a melting process and then reused.

[0136] Component C contains a propylene polymer. The weight ratio of the propylene polymer to the total weight of component C is preferably 50% by weight or more, 60% by weight or more, 70% by weight or more, or 80% by weight or more. The weight ratio of the propylene polymer to the total weight of component C is preferably 95% by weight or less, or 90% by weight or less.

[0137] Examples of the propylene polymer contained in component C include a propylene homopolymer, a random copolymer of propylene and a monomer other than propylene, and a heterophasic propylene polymer material. The propylene resin composition of the present invention may contain only one type of component C, or may contain two or more types. From the viewpoint of the rigidity and impact resistance of the molded product, component C preferably contains at least one type selected from the group consisting of a propylene homopolymer and a heterophasic propylene polymer material.

[0138] The isotactic pentad fraction (also referred to as mmmm fraction) of the propylene polymer contained in component C is not particularly limited, but may be, for example, 1.000 or less, 0.998 or less, 0.995 or less, or 0.990 or less. The lower limit is also not particularly limited, but may be, for example, 0.900 or more, or 0.925 or more. From the viewpoint of the rigidity and dimensional stability of the molded article made of the resin composition, the lower limit is preferably 0.950 or more.

[0139] Propylene homopolymer When component C contains a propylene homopolymer, from the viewpoints of the fluidity of the resin composition when melted and the toughness of the molded body, the intrinsic viscosity ([η]) of the propylene homopolymer is preferably 0.10 dL / g to 2.00 dL / g, more preferably 0.50 dL / g to 1.50 dL / g, and even more preferably 0.70 dL / g to 1.40 dL / g.

[0140] The molecular weight distribution (Mw / Mn) of the propylene homopolymer is preferably 3.0 or more, more preferably 4.0 or more. The molecular weight distribution of component C may be 30.0 or less, or may be 25.0 or less. The molecular weight distribution of component C is preferably 3.0 to 30.0, more preferably 4.0 to 25.0.

[0141] The propylene homopolymer that can be contained in component C may be, for example, produced by polymerizing propylene using a polymerization catalyst during the initial production. In the polymerization, the above-mentioned polymerization catalyst, polymerization method, polymerization mode, and polymerization conditions may be appropriately determined depending on the molecular structure of the target polymer.

[0142] Random copolymer of propylene and monomers other than propylene The random copolymer of propylene and a monomer other than propylene contains a monomer unit derived from propylene and a monomer unit derived from a monomer other than propylene. When component C contains the random copolymer, the weight ratio of the monomer unit derived from a monomer other than propylene in the random copolymer is preferably 0.01% by weight to 20% by weight based on the total weight of the random copolymer.

[0143] Examples of the monomer other than propylene include ethylene and C4-12 α-olefins, preferably at least one selected from the group consisting of ethylene and C4-10 α-olefins, more preferably at least one selected from the group consisting of ethylene, 1-butene, 1-hexene and 1-octene, and even more preferably at least one selected from the group consisting of ethylene and 1-butene.

[0144] Examples of the random copolymer include propylene-ethylene random copolymer, propylene-1-butene random copolymer, propylene-1-hexene random copolymer, propylene-1-octene random copolymer, propylene-ethylene-1-butene random copolymer, propylene-ethylene-1-hexene random copolymer, and propylene-ethylene-1-octene random copolymer.

[0145] When component C contains the random copolymer, from the viewpoint of fluidity of the resin composition when melted, the intrinsic viscosity number ([η]) of the random copolymer is preferably 0.10 dL / g to 2.00 dL / g, more preferably 0.50 dL / g to 1.50 dL / g, and even more preferably 0.70 dL / g to 1.40 dL / g.

[0146] The molecular weight distribution (Mw / Mn) of the random polymer is preferably 3.0 or more, more preferably 4.0 or more. The molecular weight distribution of the random polymer may be 30.0 or less, or may be 25.0 or less. The molecular weight distribution of the random polymer is preferably 3.0 to 30.0, more preferably 4.0 to 25.0.

[0147] The random copolymer may be produced, for example, in the initial production, by polymerizing propylene and a monomer other than propylene according to a polymerization catalyst, polymerization method, polymerization scheme, and polymerization conditions that can be used in the production of the propylene homopolymer.

[0148] Heterophagic propylene polymer materials When component C contains a heterophasic propylene polymerization material, the heterophasic propylene polymerization material may be produced, for example, in the initial production by carrying out a first polymerization step of forming a polymer I and a second polymerization step of forming a polymer II. These polymerization steps can be carried out according to the polymerization catalyst, polymerization method, polymerization scheme, and polymerization conditions that can be used in the production of the propylene homopolymer. The total weight of the polymer I and the polymer II contained in the heterophasic propylene polymerization material may be 100% by weight, relative to the total weight of the heterophasic propylene polymerization material being 100% by weight.

[0149] As described above, the polymer I contains 80% by weight or more of monomer units derived from propylene. The polymer I may be, for example, a propylene homopolymer, or may contain monomer units derived from a monomer other than propylene. When the polymer I contains monomer units derived from a monomer other than propylene, the weight ratio of the monomer units derived from the monomer other than propylene to the total weight of the polymer I may be, for example, 0.01% by weight or more and less than 20% by weight.

[0150] Examples of the monomer other than propylene include ethylene and C4 or higher α-olefins, preferably at least one selected from the group consisting of ethylene and C4 to C10 α-olefins, more preferably at least one selected from the group consisting of ethylene, 1-butene, 1-hexene, and 1-octene, and even more preferably at least one selected from the group consisting of ethylene and 1-butene.

[0151] Examples of copolymers containing monomer units derived from a monomer other than propylene include propylene-ethylene copolymers, propylene-1-butene copolymers, propylene-1-hexene copolymers, propylene-1-octene copolymers, propylene-ethylene-1-butene copolymers, propylene-ethylene-1-hexene copolymers, and propylene-ethylene-1-octene copolymers.

[0152] From the viewpoint of dimensional stability of the molded article, polymer I is preferably a propylene homopolymer, a propylene-ethylene copolymer, a propylene-1-butene copolymer, or a propylene-ethylene-1-butene copolymer, and more preferably a propylene homopolymer.

[0153] The isotactic pentad fraction of the polymer I may be preferably 1.000 or less, 0.998 or less, 0.995 or less, or 0.990 or less. The lower limit is not particularly limited, but may be, for example, 0.900 or more, 0.925 or more, or 0.950 or more.

[0154] The weight ratio of polymer I to the total weight of the heterophasic propylene polymerization material is preferably 50% by weight to 99% by weight, and more preferably 60% by weight to 95% by weight.

[0155] As described above, polymer II contains monomer units derived from at least one α-olefin selected from the group consisting of ethylene and C4-12 α-olefins and monomer units derived from propylene. Preferably, polymer II contains 30% by weight or more of monomer units derived from at least one α-olefin selected from the group consisting of ethylene and C4-12 α-olefins, and also contains monomer units derived from propylene.

[0156] The weight ratio of monomer units derived from at least one α-olefin selected from the group consisting of ethylene and C4-12 α-olefins to the total weight of polymer II may be 30% by weight to 70% by weight, or may be 35% by weight to 60% by weight.

[0157] In polymer II, the at least one α-olefin selected from the group consisting of ethylene and C4 to C12 α-olefins is preferably at least one selected from the group consisting of ethylene and C4 to C10 α-olefins, more preferably at least one selected from the group consisting of ethylene, 1-butene, 1-hexene, 1-octene and 1-decene, and even more preferably at least one selected from the group consisting of ethylene and 1-butene.

[0158] Examples of the polymer II include a propylene-ethylene copolymer, a propylene-ethylene-1-butene copolymer, a propylene-ethylene-1-hexene copolymer, a propylene-ethylene-1-octene copolymer, a propylene-ethylene-1-decene copolymer, a propylene-1-butene copolymer, a propylene-1-hexene copolymer, a propylene-1-octene copolymer and a propylene-1-decene copolymer, preferably a propylene-ethylene copolymer, a propylene-1-butene copolymer, or a propylene-ethylene-1-butene copolymer, more preferably a propylene-ethylene copolymer.

[0159] The weight ratio of the polymer II to the total weight of the heterophasic propylene polymerization material is preferably 1% by weight to 50% by weight, and more preferably 5% by weight to 40% by weight.

[0160] The weight ratio of the xylene insoluble components (CXIS components) in the heterophasic propylene polymerization material to the total weight of the heterophasic propylene polymerization material is preferably 50% by weight to 99% by weight, and more preferably 60% by weight to 95% by weight.

[0161] The weight ratio of the xylene soluble component (CXS component) in the heterophasic propylene polymerization material to the total weight of the heterophasic propylene polymerization material is preferably 1 wt % to 50 wt %, and more preferably 5 wt % to 40 wt %.

[0162] In the present invention, it is considered that the CXIS component in the heterophasic propylene polymerization material is mainly composed of polymer I, and the CXS component in the heterophasic propylene polymerization material is mainly composed of polymer II.

[0163] Examples of heterophasic propylene polymeric materials include (propylene)-(propylene-ethylene) polymeric materials, (propylene)-(propylene-ethylene-1-butene) polymeric materials, (propylene)-(propylene-ethylene-1-hexene) polymeric materials, (propylene)-(propylene-ethylene-1-octene) polymeric materials, (propylene)-(propylene-1-butene) polymeric materials, (propylene)-(propylene-1-hexene) polymeric materials, (propylene)-(propylene-1-octene) polymeric materials, (propylene)-(propylene-1-decene) polymeric materials, (Propylene-ethylene)-(propylene-ethylene) polymerization material, (propylene-ethylene)-(propylene-ethylene-1-butene) polymerization material, (propylene-ethylene)-(propylene-ethylene-1-hexene) polymerization material, (propylene-ethylene)-(propylene-ethylene-1-octene) polymerization material, (propylene-ethylene)-(propylene-ethylene-1-decene) polymerization material, (propylene-ethylene)-(propylene-1-butene) polymerization material, (propylene-ethylene)-(propylene-1-hexene) polymerization material, (propylene-ethylene (propylene-1-octene) polymerization materials, (propylene-ethylene)-(propylene-1-decene) polymerization materials, (propylene-1-butene)-(propylene-ethylene) polymerization materials, (propylene-1-butene)-(propylene-ethylene-1-butene) polymerization materials, (propylene-1-butene)-(propylene-ethylene-1-hexene) polymerization materials, (propylene-1-butene)-(propylene-ethylene-1-octene) polymerization materials, (propylene-1-butene)-(propylene-ethylene-1-decene) polymerization materials, (propylene-1-butene)-(propylene-ethylene-1-decene) polymerization materials, (propylene-1-butene)-(propylene (propylene-1-butene) polymerization material, (propylene-1-butene)-(propylene-1-hexene) polymerization material, (propylene-1-butene)-(propylene-1-octene) polymerization material, (propylene-1-butene)-(propylene-1-decene) polymerization material, (propylene-1-hexene)-(propylene-1-hexene) polymerization material, (propylene-1-hexene)-(propylene-1-octene) polymerization material, (propylene-1-hexene)-(propylene-1-decene) polymerization material, (propylene-1-octene)-(propylene-1-octene) polymerization material,And (propylene-1-octene)-(propylene-1-decene) polymerization materials are included.

[0164] Here, the description of "(propylene)-(propylene-ethylene) polymerization material" means "a heterophasic propylene polymerization material in which polymer I is a propylene homopolymer and polymer II is a propylene-ethylene copolymer". The same applies to other similar expressions.

[0165] The heterophasic propylene polymerization material is preferably a (propylene)-(propylene-ethylene) polymerization material, a (propylene)-(propylene-ethylene-1-butene) polymerization material, a (propylene-ethylene)-(propylene-ethylene) polymerization material, a (propylene-ethylene)-(propylene-ethylene-1-butene) polymerization material, or a (propylene-1-butene)-(propylene-1-butene) polymerization material, and more preferably a (propylene)-(propylene-ethylene) polymerization material.

[0166] The intrinsic viscosity ([η]I) of polymer I is preferably 0.10 dL / g to 2.00 dL / g, more preferably 0.50 dL / g to 1.50 dL / g, and still more preferably 0.70 dL / g to 1.40 dL / g.

[0167] The intrinsic viscosity ([η]II) of polymer II is preferably 1.00 dL / g to 10.00 dL / g, more preferably 2.00 dL / g to 10.00 dL / g, and still more preferably 2.00 dL / g to 9.00 dL / g.

[0168] Also, the ratio ([η]II / [η]I) of the intrinsic viscosity ([η]II) of polymer II to the intrinsic viscosity ([η]I) of polymer I is preferably 1 to 20, and more preferably 1 to 10.

[0169] The intrinsic viscosity ([η]I) of polymer I can be measured, for example, by the method described above for polymer I of the heterophasic propylene polymerization material as component A.

[0170] The intrinsic viscosity number ([η]II) of the polymer II can be measured, for example, by the method described above for the polymer II of the heterophasic propylene polymerization material as component A.

[0171] The intrinsic viscosity number ([η]CXIS) of the CXIS component is preferably 0.10 dL / g to 2.00 dL / g, more preferably 0.50 dL / g to 1.50 dL / g, and even more preferably 0.70 dL / g to 1.40 dL / g.

[0172] The intrinsic viscosity number ([η]CXS) of the CXS component is preferably 1.00 dL / g to 10.00 dL / g, more preferably 2.00 dL / g to 10.00 dL / g, and even more preferably 2.00 dL / g to 9.00 dL / g.

[0173] The ratio ([η]CXS / [η]CXIS) of the intrinsic viscosity number of the CXS component ([η]CXS) to the intrinsic viscosity number of the CXIS component ([η]CXIS) is preferably 1-20, and more preferably 1-10.

[0174] The molecular weight distribution (Mw(I) / Mn(I)) of Polymer I is preferably 3.0 or more, and more preferably 4.0 or more.

[0175] The molecular weight distribution of the CXIS component (Mw(CXIS) / Mn(CXIS)) is preferably 3.0 or more, and more preferably 4.0 or more.

[0176] From the viewpoint of molding processability of the resin composition, the MFR of component C (temperature 230°C, load 2.16 kgf) is preferably 5 g / 10 min or more, more preferably 10 g / 10 min or more, even more preferably 20 g / 10 min or more, and even more preferably 25 g / 10 min or more. The MFR of component C (temperature 230°C, load 2.16 kgf) is preferably 300 g / 10 min or less, more preferably 100 g / 10 min or less, and even more preferably 60 g / 10 min or less.

[0177] In one embodiment, component C contains ash. The ash content of component C means a component remaining as ash after heating component C at 600° C. for 60 minutes. The weight ratio of the ash content can be measured by the method described above for component A.

[0178] In one embodiment, the weight ratio of the ash content is 5% by weight or more, or 10% by weight or more, based on the total weight of component C. In one embodiment, the weight ratio of the ash content is 40% by weight or less, 30% by weight or less, or 25% by weight or less, based on the total weight of component C.

[0179] In one embodiment, component C contains a filler as described below. When component C contains a filler, the majority of the filler is contained in the ash content of component C. When component C contains a filler, the weight ratio of the filler is considered to roughly correspond to the weight ratio of the ash content of component C.

[0180] In one embodiment, component C may include an ethylene-α-olefin copolymer as described below.

[0181] The weight ratio of the xylene insoluble component (CXIS component) in component C is preferably 30% by weight or more and 90% by weight or less, more preferably 40% by weight or more and 80% by weight or less, and even more preferably 46% by weight or more and 72% by weight or less. The weight ratio of the xylene soluble component (CXS component) in component C is preferably 10% by weight or more and 60% by weight or less, more preferably 20% by weight or more and 55% by weight or less, and even more preferably 28% by weight or more and 54% by weight or less. The weight ratios of the CXIS component and the CXS component can be measured by the method described above for component A.

[0182] The CXIS component in component C is considered to be mainly composed of polymer I of the heterophasic propylene polymerization material contained in component C and / or a propylene homopolymer. The CXS component in component C is considered to be mainly composed of polymer II of the heterophasic propylene polymerization material contained in component C and / or an ethylene-α-olefin copolymer.

[0183] Ethylene-α-olefin copolymer D In one embodiment, the resin composition of the present invention contains an ethylene-α-olefin polymer D. The ethylene-α-olefin polymer D may be an ethylene-α-olefin block polymer Db, an ethylene-α-olefin random polymer Dr, or a mixture thereof.

[0184] In component D, the sum of the monomer units derived from ethylene and the monomer units derived from a C4 or higher α-olefin contained in component D may be 100% by weight, relative to the total weight of component D being 100% by weight.

[0185] Examples of the C4 or higher α-olefin include C4-12 α-olefins. Examples of the C4-12 α-olefin include 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene, 1-octene, and 1-decene, and preferably 1-butene, 1-hexene, and 1-octene. The α-olefin may be an α-olefin having a cyclic structure, such as vinylcyclopropane or vinylcyclobutane.

[0186] Examples of component D include ethylene-1-butene copolymers, ethylene-1-hexene copolymers, ethylene-1-octene copolymers, ethylene-1-decene copolymers, ethylene-(3-methyl-1-butene) copolymers, and copolymers of ethylene and an α-olefin having a cyclic structure.

[0187] The weight ratio of monomer units derived from C4 or higher α-olefins relative to the total weight of component D is preferably 1 wt % to 49 wt %, more preferably 5 wt % to 49 wt %, and further preferably 24 wt % to 49 wt %.

[0188] From the viewpoint of impact resistance of the molded product, the density of component D is preferably 0.85 g / cm 3 ~0.89g / cm 3 and more preferably 0.85 g / cm 3 ~0.88g / cm 3 and more preferably 0.85 g / cm3 ~0.87g / cm 3 It is.

[0189] The MFR of component D (temperature: 230° C., load: 2.16 kgf) is preferably 0.1 g / 10 min to 80 g / 10 min.

[0190] Manufacturing method of component D Component D can be produced by polymerizing ethylene and a C4 or higher α-olefin using a polymerization catalyst.

[0191] Examples of polymerization catalysts include homogeneous catalysts such as metallocene catalysts and Ziegler-Natta type catalysts.

[0192] Examples of homogeneous catalysts include a catalyst consisting of a compound of a transition metal of Group 4 of the periodic table having a cyclopentadienyl ring and an alkylaluminoxane; a catalyst consisting of a compound of a transition metal of Group 4 of the periodic table having a cyclopentadienyl ring, a compound that reacts with the transition metal compound to form an ionic complex, and an organoaluminum compound; and a catalyst modified by supporting a catalytic component (a compound of a transition metal of Group 4 of the periodic table having a cyclopentadienyl ring, a compound that forms an ionic complex, an organoaluminum compound, etc.) on inorganic particles (silica, clay minerals, etc.).

[0193] An example of a Ziegler-Natta type catalyst is a catalyst that combines a titanium-containing solid transition metal component with an organometallic component.

[0194] Commercially available products may be used as component D. Examples of commercially available components D include Engage (registered trademark) manufactured by Dow Chemical Japan Co., Ltd., Tafmer (registered trademark) manufactured by Mitsui Chemicals, Inc., Neozex (registered trademark) and Ultzex ​​(registered trademark) manufactured by Prime Polymer Co., Ltd., Excellen FX (registered trademark), Sumikasen (registered trademark), and Esprene SPO (registered trademark) manufactured by Sumitomo Chemical Co., Ltd.

[0195] Other recycled propylene resin composition E In one embodiment, the resin composition of the present invention contains a recycled propylene resin composition E other than components A and B. Examples of the propylene polymer contained in component E include a propylene homopolymer, a random copolymer of propylene and a monomer other than propylene, and a heterophasic propylene polymer material. The descriptions given as examples for components A and B may be applied to these.

[0196] Examples of raw materials for component E, that is, raw materials to be recycled (subjected to the recovery process), include used interior parts of automobiles (instrument panels, door trims, etc.), exterior parts of automobiles other than bumpers and pillars, other automobile parts (battery cases, etc., excluding washer tanks), packaging containers (retort pouches for food, refill pouches, detergent bottles, etc.), housings for household electrical appliances, office supplies (trays, etc.), and daily household items (contact lens cases, etc.). The recovery process is not particularly limited, and examples include known methods.

[0197] Virgin propylene polymer F In one embodiment, the resin composition of the present invention contains virgin propylene polymer F. Examples of component F include propylene homopolymers, random copolymers of propylene and monomers other than propylene, and heterophasic propylene polymer materials. The descriptions given as examples for components A and B may be applied to these.

[0198] Filler G In one embodiment, the resin composition of the present invention comprises a filler G.

[0199] Examples of the component G include inorganic fillers and organic fillers. The propylene resin composition of the present invention may contain only one type of component G, or may contain two or more types.

[0200] Inorganic fillers include glass, silicate minerals, alumina, silica, silicon dioxide, titanium oxide, iron oxide, aluminum oxide, magnesium oxide, antimony oxide, barium ferrite, strontium ferrite, beryllium oxide, magnesium hydroxide, aluminum hydroxide, basic magnesium carbonate, calcium carbonate, magnesium carbonate, carbonate minerals, calcium sulfate, magnesium sulfate, basic magnesium sulfate, calcium sulfite, carbon black, and cadmium sulfide.

[0201] Organic fillers include polyesters, aromatic polyamides, cellulose and vinylons.

[0202] The shape of the filler may be plate-like, needle-like, or fibrous.

[0203] From the viewpoints of rigidity, impact resistance and dimensional stability of the molded article, component G is preferably an inorganic filler, and more preferably talc which is a plate-like silicate mineral.

[0204] From the viewpoint of the rigidity, impact resistance and dimensional stability of the molded article, the average particle diameter D50[L] of component G is preferably 20.0 μm or less, more preferably 15.0 μm or less. The average particle diameter D50[L] of component G may be 2.0 μm or more, or may be 4.0 μm or more. The average particle diameter D50[L] of component G is preferably 2.0 μm to 20.0 μm, more preferably 4.0 μm to 15.0 μm. In one embodiment, the average particle diameter D50[L] of component G may be 7.0 μm to 15.0 μm. From the viewpoints of rigidity, impact resistance and dimensional stability of the molded body, the average particle size D50[S] of component G is preferably 5.0 μm or less, and more preferably 3.0 μm or less. The average particle diameter D50[S] of component G may be 0.5 μm or more, or may be 1.0 μm or more. The average particle diameter D50[S] of component G is preferably 0.5 μm to 5.0 μm, and more preferably 1.0 μm to 3.0 μm. In one embodiment, the average particle diameter D50[S] of component G may be 2.0 μm to 5.0 μm. From the viewpoint of the rigidity and dimensional stability of the molded article, the ratio of the average particle diameter D50[L] to the average particle diameter D50[S] of component G (D50[L] / D50[S]) may be 1.5 or more, or may be 2.5 or more. D50[L] / D50[S] may be 10 or less, or may be 8 or less. D50[L] / D50[S] may be 1.5 to 10, 1.5 to 8, 2.5 to 10, or 2.5 to 8. In one embodiment, D50[L] / D50[S] may be 3.0 to 8.

[0205] In this specification, the term "average particle size D50[L]" refers to a particle size distribution measured based on volumetric particle size distribution data measured by a laser diffraction method according to the method specified in JIS R1629, and refers to the particle size (50% equivalent particle size) when the cumulative number of particles from the smaller particle size side reaches 50% in the particle size distribution measurement data. The particle size defined in this way is generally called the "50% equivalent particle size" and is represented by "D50". In this specification, the term "average particle size D50 [S]" refers to a particle size distribution measurement data based on volume measured by a centrifugal sedimentation method in accordance with the method specified in JIS R1619, and means the particle size when the cumulative number of particles from the smaller particle size side reaches 50% in the particle size distribution measurement data (50% equivalent particle size). The larger the ratio of the average particle diameter D50[L] of component G to the average particle diameter D50[S] (D50[L] / D50[S]), the more excellent the rigidity and dimensional stability of the molded body.

[0206] Component G may be a virgin filler, or may be a filler contained in a recycled resin composition.

[0207] Weight ratio of each component In the propylene resin composition of the present invention, the weight ratio of each component is not particularly limited. From the viewpoint of the IZOD impact strength of the molded product, the weight ratio of component A may be 1 part by weight to 99 parts by weight, 5 parts by weight to 95 parts by weight, 5 parts by weight to 90 parts by weight, 10 parts by weight to 90 parts by weight, 20 parts by weight to 80 parts by weight, 25 parts by weight to 75 parts by weight, or 30 parts by weight to 70 parts by weight, relative to 100 parts by weight of the total weight of the contained components A to G or the total weight of the propylene resin composition or molded product of the present invention. From the viewpoint of the IZOD impact strength of the molded body, the weight ratio of component B relative to 100 parts by weight of the total content of components A to G or 100 parts by weight of the total weight of the propylene resin composition or molded body of the present invention may be 1 part by weight to 99 parts by weight, 5 parts by weight to 95 parts by weight, 5 parts by weight to 90 parts by weight, 10 parts by weight to 90 parts by weight, 20 parts by weight to 80 parts by weight, or 25 parts by weight to 75 parts by weight. From the viewpoint of the IZOD impact strength of the molded body, the weight ratio of component B relative to 100 parts by weight of component A may be 1 part by weight to 300 parts by weight, may be 1 part by weight to 99 parts by weight, may be 5 parts by weight to 95 parts by weight, may be 10 parts by weight to 250 parts by weight, may be 10 parts by weight to 90 parts by weight, may be 20 parts by weight to 80 parts by weight, may be 30 parts by weight to 200 parts by weight, may be 50 parts by weight to 150 parts by weight, may be 75 parts by weight to 125 parts by weight, or may be 80 parts by weight to 100 parts by weight.

[0208] When the propylene resin composition of the present invention contains component C, from the viewpoint of the IZOD impact strength of the molded article, the weight ratio of component C may be 1 part by weight to 98 parts by weight, 5 parts by weight to 95 parts by weight, 5 parts by weight to 90 parts by weight, 10 parts by weight to 90 parts by weight, 20 parts by weight to 80 parts by weight, or 30 parts by weight to 70 parts by weight, relative to 100 parts by weight of the total content of components A to G or 100 parts by weight of the total weight of the propylene resin composition or molded article of the present invention. Alternatively, the weight ratio of component C may be 0 parts by weight to 65 parts by weight relative to 100 parts by weight of the total content of components A to G or 100 parts by weight of the total weight of the propylene resin composition or molded article of the present invention. Note that "0 parts by weight" means an embodiment in which component C is not included. In order to describe embodiments that contain component C and embodiments that do not contain component C without distinguishing between cases, descriptions such as "containing 0 to 65 parts by weight of component C" are used, which means "containing no component C, or containing more than 0 parts by weight and not more than 65 parts by weight of component C."

[0209] When the propylene resin composition of the present invention contains component D, from the viewpoint of the IZOD impact strength of the molded product, the weight ratio of component D may be 0 to 50 parts by weight, 0.1 to 40 parts by weight, 1 to 30 parts by weight, or 5 to 25 parts by weight relative to 100 parts by weight of the total content of components A to G or 100 parts by weight of the total weight of the propylene resin composition or molded product of the present invention.

[0210] When the propylene resin composition of the present invention contains component E, from the viewpoint of the IZOD impact strength of the molded product, the weight ratio of component E relative to 100 parts by weight of the total content of components A to G or 100 parts by weight of the total weight of the propylene resin composition or molded product of the present invention may be 0 parts by weight to 80 parts by weight, 1 part by weight to 60 parts by weight, 5 parts by weight to 50 parts by weight, 10 parts by weight to 40 parts by weight, 10 parts by weight to 35 parts by weight, or 15 parts by weight to 25 parts by weight.

[0211] When the propylene resin composition of the present invention contains component F, from the viewpoint of the IZOD impact strength of the molded product, the weight ratio of component F relative to 100 parts by weight of the total content of components A to G or 100 parts by weight of the total weight of the propylene resin composition or molded product of the present invention may be 0 parts by weight to 80 parts by weight, 1 part by weight to 60 parts by weight, 5 parts by weight to 50 parts by weight, 10 parts by weight to 40 parts by weight, 10 parts by weight to 35 parts by weight, or 15 parts by weight to 25 parts by weight.

[0212] When the propylene resin composition of the present invention contains component G, the weight ratio of component G may be 0 to 80 parts by weight, 1 to 60 parts by weight, 5 to 50 parts by weight, 10 to 40 parts by weight, 10 to 35 parts by weight, or 15 to 25 parts by weight, relative to 100 parts by weight of the total content of components A to G or 100 parts by weight of the total weight of the propylene resin composition or molded article of the present invention, from the viewpoint of the IZOD impact strength of the molded article. In one embodiment, the weight ratio of component G may be 25 to 35 parts by weight, or 30 to 35 parts by weight, relative to 100 parts by weight of the total content of components A to G or 100 parts by weight of the total weight of the propylene resin composition or molded article of the present invention, from the viewpoint of the elastic modulus.

[0213] The total weight ratio of components A to G is preferably 50% by weight or more relative to the total weight of the propylene resin composition or molded article of the present invention. More preferably, the total weight ratio of components A to F is 50% by weight or more, 60% by weight or more, 70% by weight or more, 80% by weight or more, or 90% by weight or more. Even more preferably, the total weight ratio of components A to C, E, and F is 50% by weight or more, 60% by weight or more, 70% by weight or more, 80% by weight or more, or 90% by weight or more. Furthermore, even more preferably, the total weight ratio of components A to C or the total weight ratio of components A to B is 50% by weight or more, 60% by weight or more, 70% by weight or more, 80% by weight or more, 90% by weight or more, 95% by weight or more, or 100% by weight. The above "100% by weight" also includes an embodiment in which a small amount of other components is contained and the weight ratio is strictly less than 100% by weight, provided that the effects of the present invention are achieved.

[0214] Method for producing propylene resin composition The propylene resin composition of the present invention can be obtained by melt-kneading the raw material components. The temperature during melt-kneading may be 180°C or higher, may be 180°C to 300°C, or may be 180°C to 250°C.

[0215] For the melt kneading, a Banbury mixer, a single screw extruder, a twin screw co-rotating extruder, or the like can be used.

[0216] The order of kneading the raw material components is not particularly limited. For example, components A to G may be kneaded all at once, or some of components A to G may be kneaded and then the resulting mixture may be kneaded with other components.

[0217] The shape of the propylene resin composition is not particularly limited, and the propylene resin composition may be, for example, in the form of a strand, a sheet, a plate, or a pellet. The pellet-shaped resin composition can be produced, for example, by forming a strand-shaped resin composition and then cutting it to an appropriate length.

[0218] From the viewpoint of the moldability of the resin composition and production stability when producing a molded article, the resin composition before being molded into a molded article is preferably in the form of pellets having a length of about 1 mm to 50 mm.

[0219] The propylene resin composition of the present invention may contain any other component X. Examples of such component X include neutralizing agents, antioxidants, ultraviolet absorbers, nucleating agents, lubricants, antistatic agents, antiblocking agents, processing aids, organic peroxides, colorants (inorganic pigments, organic pigments, pigment dispersants, etc.), foaming agents, foam nucleating agents, plasticizers, flame retardants, crosslinking agents, crosslinking aids, brightness enhancers, antibacterial agents, and light diffusing agents. Examples of nucleating agents include metal salts of carboxylates such as lithium benzoate, sodium benzoate, aluminum benzoate, aluminum salt of 4-tert-butylbenzoic acid, and sodium adipate; sodium bis(4-tert-butylphenyl)phosphate, and metal salts of acidic phosphates other than the compound represented by the general formula (1); and polyhydric alcohol derivatives such as dibenzylidene sorbitol, bis(methylbenzylidene) sorbitol, and bis(dimethylbenzylidene) sorbitol. From the viewpoint of dimensional stability, metal salts of carboxylates and bis(dimethylbenzylidene) sorbitol are preferred. The propylene resin composition of the present invention may contain only one kind of these components, or may contain two or more kinds of them. When the propylene resin composition of the present invention contains a nucleating agent, from the viewpoint of dimensional stability, the weight ratio of the nucleating agent relative to 100 parts by weight of the total content of components A to G or 100 parts by weight of the total weight of the propylene resin composition or molded article of the present invention may be 0.01 parts by weight to 1.0 parts by weight, 0.05 parts by weight to 0.5 parts by weight, or 0.1 parts by weight to 0.5 parts by weight.

[0220] Properties of propylene resin compositions In one embodiment, the MFR (temperature 230°C, load 2.16 kgf) of the propylene resin composition of the present invention is preferably 15g / 10min to 70g / 10min, may be 25g / 10min to 65g / 10min, or may be 35g / 10min to 60g / 10min. From the viewpoint of molding processability, the MFR (temperature 230°C, load 2.16 kgf) of the propylene resin composition is preferably 15g / 10min or more. From the viewpoint of impact strength of the obtained molded article, the MFR (temperature 230°C, load 2.16 kgf) of the propylene resin composition is preferably 70g / 10min or less. In one embodiment, from the viewpoint of dimensional stability, the MFR (temperature: 230°C, load: 2.16 kgf) of the propylene resin composition of the present invention is preferably 15 g / 10 min to 50 g / 10 min, may be 15 g / 10 min to 35 g / 10 min, or may be 15 g / 10 min to 30 g / 10 min.

[0221] In one embodiment, the density of the propylene resin composition of the present invention is preferably 1.1 g / cm 3 More preferably, it is 1.08 g / cm or less. 3 More preferably, it is 1.06 g / cm or less. 3 The following is the result. In one embodiment, from the viewpoint of dimensional stability, the density of the propylene resin composition of the present invention is preferably 1.08 g / cm 3 ~1.2g / cm 3 and more preferably 1.1 g / cm 3 ~1.18g / cm 3 It is.

[0222] The density of the propylene resin composition of the present invention is measured by the underwater displacement method, which is Method A described in JIS K7112.

[0223] In one embodiment, the IZOD impact strength (measured at -30°C) of the propylene resin composition of the present invention is 4.2 kJ / m 2 or more, 4.3 kJ / m 2 or more, 4.4 kJ / m 2 or more, 4.5 kJ / m 2 or more, 4.6 kJ / m 2 or more, 4.7 kJ / m 2 or more, 4.8 kJ / m 2 or more, 4.9 kJ / m 2 or more, 5.0 kJ / m 2 The IZOD impact strength can be measured by the method described in the Examples.

[0224] In one embodiment, the IZOD impact strength (measured at 23° C.) of the propylene resin composition of the present invention is 20 kJ / m 2More than 23kJ / m 2 or more, and 2 or more, 30 kJ / m 2 or more, 35 kJ / m 2 or more, 38 kJ / m 2 or more, and 2 or more, 42 kJ / m 2 The IZOD impact strength can be measured by the method described in the Examples.

[0225] The propylene resin composition of the present invention can be used as a material for forming a molded article by molding. The propylene resin composition of the present invention is preferably used as an injection molding material. Hereinafter, an example of an injection molded article produced by using the propylene resin composition of the present invention as an injection molding material will be described.

[0226] Molded body The molded article of the present invention is made of the propylene resin composition of the present invention. The molded article of the present invention is excellent in IZOD impact strength. The molded article is preferably an injection molded article.

[0227] The injection molded article can be manufactured by injection molding. Examples of injection molding include general injection molding, injection foam molding, supercritical injection foam molding, ultra-high speed injection molding, injection compression molding, gas-assisted injection molding, sandwich molding, sandwich foam molding, and insert-outsert molding. There is no particular restriction on the shape of the injection molded article.

[0228] The injection molded article of the present invention can be preferably used for, for example, automotive material applications, home appliance material applications, and container applications, and is particularly suitable for automotive interior and exterior applications. Examples of automotive interior and exterior parts include door trims, pillars, instrument panels, and bumpers. EXAMPLES

[0229] The present invention will be described in more detail below with reference to examples, although the present invention is not limited to these examples.

[0230] In the examples and comparative examples, the following raw materials were used.

[0231] Component A-1: ​​Pillar-derived recycled propylene resin composition As component A, recycled propylene resin composition A-1 was prepared, which was a pulverized product obtained by crushing used polypropylene pillars collected from automobiles and then carrying out a coating film peeling process. The composition has the following characteristics. MFR (230℃, 2.16kg load): 31.1g / 10min Ash content: 3.2% by weight CXIS amount: 83.1% by weight CXS amount: 16.9% by weight

[0232] Component A-2: Pillar-derived recycled propylene resin composition As component A, recycled propylene resin composition A-2 was prepared, which was a pulverized product obtained by crushing used polypropylene pillars collected from automobiles and then carrying out a coating film peeling process. The composition has the following characteristics. MFR (230℃, 2.16kg load): 24.5g / 10min Ash content: 5.1% by weight CXIS amount: 78.7% by weight CXS amount: 21.3% by weight

[0233] The MFR was measured under the conditions of 230°C and a load of 2.16 kgf in accordance with JIS K7210-1:2014 and K7210-2:2014. The same applies below.

[0234] Component B-1: Recycled propylene resin composition derived from washer tanks As component B, a recycled propylene resin composition B-1 was prepared by crushing used polypropylene washer tanks collected from automobiles. The composition has the following characteristics. MFR (230℃, 2.16kg load): 5.3g / 10 minutes Ash content: 0.1% by weight CXIS amount: 87.4% by weight CXS amount: 12.6% by weight

[0235] Component B-2: Recycled propylene resin composition derived from washer tanks As component B, recycled propylene resin composition B-2 was prepared by crushing used polypropylene washer tanks collected from automobiles. The composition has the following characteristics. MFR (230℃, 2.16kg load): 3.4g / 10min Ash content: 0.3% by weight CXIS amount: 80.8% by weight CXS amount: 19.2% by weight

[0236] Component C-1: Recycled propylene resin composition derived from bumpers As component C, recycled propylene resin composition C-1 was prepared, which was a pulverized product obtained by crushing used polypropylene bumpers collected from automobiles and then carrying out a coating peeling process. The composition has the following characteristics. MFR (230℃, 2.16kg load): 49.8g / 10min Ash content: 18.1% by weight CXIS amount: 70.0% by weight CXS amount: 30.0% by weight

[0237] Component C-2: Recycled propylene resin composition derived from bumpers As component C, recycled propylene resin composition C-2 was prepared, which was a pulverized product obtained by crushing used polypropylene bumpers collected from automobiles and then carrying out a coating peeling process. The composition has the following characteristics. MFR (230℃, 2.16kg load): 44.9g / 10min Ash content: 11.4% by weight CXIS amount: 68.8% by weight CXS amount: 31.2% by weight

[0238] Examples 1 to 8 and Comparative Examples 1 to 2

[0239] Production of propylene resin composition Each component of the pillar-derived recycled propylene resin composition A, the washer tank-derived recycled propylene resin composition B, and the bumper-derived recycled propylene resin composition C was pulverized to a diameter of about 9 mm and then uniformly premixed in the weight ratio shown in Table 1. The mixture was then melt-kneaded using a twin-screw kneader (Technovel Corporation, KZW-15 / 45MG (cylinder inner diameter 15.5 mm, screw outer diameter 15.0 mm, L / D=45)) to produce a pellet-shaped propylene resin composition.

[0240] The melt-kneading conditions are as follows. Cylinder temperature: 200℃ Screw rotation speed: 500 rpm Screen mesh: 2 layers of 100 mesh and 50 mesh Output: 6kg / hr

[0241] Manufacturing of injection molded products for IZOD impact strength evaluation The obtained pellet-like resin composition was injection molded under the following conditions within the range specified in JIS K7152 to produce injection-molded test pieces for evaluating room temperature IZOD impact strength and low temperature IZOD impact strength. The resin composition molten in the injection molding machine was supplied into the mold cavity from the gate. Injection molding machine: Toyo Machinery & Metals Si30III (clamping force 30 tons, cylinder diameter 18 mm) Cylinder temperature: 220℃ Mold temperature: 50℃ Injection speed: 20mm / sec Cooling time: 30 seconds

[0242] IZOD impact strength measurement A test piece having a thickness of 4 mm was cut out from the above-mentioned injection molded article, and the IZOD impact strength was measured at 23° C. and −30° C. using an IZOD impact tester (manufactured by Toyo Seiki Co., Ltd.) in accordance with ASTM D256. The results are shown in Table 1. [Table 1]

Claims

1. A recycled propylene resin composition A derived from pillars; Recycled propylene resin composition B derived from washer tanks; Bumper-derived recycled propylene resin composition C; A propylene resin composition comprising: The propylene resin composition contains resin composition A, resin composition B, and resin composition C in a total amount of 100% by weight based on the total weight of the propylene resin composition, the resin composition A is contained in an amount of 25% by weight to 75% by weight, the resin composition B is contained in an amount of 10% by weight to 75% by weight, and the resin composition C is contained in an amount of 0% by weight to 65% by weight, Resin composition A has a melt flow rate of 20 g / 10 min or more and 40 g / 10 min or less at a temperature of 230° C. and a load of 2.16 kgf; The weight ratio of the ash content in the resin composition A is 1% by weight or more and 10% by weight or less, The weight ratio of the xylene insoluble component (CXIS component) in the resin composition A is 73% by weight or more and 90% by weight or less, and the weight ratio of the xylene soluble component (CXS component) in the resin composition A is 10% by weight or more and 27% by weight or less, as measured by the following method; Resin composition B has a melt flow rate of 0.1 g / 10 min or more and 10 g / 10 min or less at a temperature of 230° C. and a load of 2.16 kgf; The weight ratio of the ash content in the resin composition B is 0.01% by weight or more and 5% by weight or less, The weight ratio of the xylene insoluble component (CXIS component) in the resin composition B is 78% by weight or more and 90% by weight or less, and the weight ratio of the xylene soluble component (CXS component) in the resin composition B is 10% by weight or more and 22% by weight or less, as measured by the following method; Resin composition C has a melt flow rate of 20 g / 10 min or more and 60 g / 10 min or less at a temperature of 230° C. and a load of 2.16 kgf; The weight ratio of the ash content in the resin composition C is 10% by weight or more and 25% by weight or less, The weight ratio of the xylene insoluble component (CXIS component) in the resin composition C is 46% by weight or more and 72% by weight or less, and the weight ratio of the xylene soluble component (CXS component) in the resin composition C is 28% by weight or more and 54% by weight or less, as measured by the following method. Propylene resin composition. <Method for measuring weight ratio of CXIS component and CXS component> About 4 g of the sample is refluxed in boiling xylene for 5 hours using a cylindrical filter paper and a Soxhlet extraction tube. The extract is then concentrated under reduced pressure using a rotary evaporator to obtain a polymer component. About 2 g of the obtained polymer component is precisely weighed (this "weight of the polymer component" is designated as "a") and dissolved by heating in boiling xylene for 2 hours. Then, after cooling to 20°C, the mixture is filtered using filter paper. The filtered filtrate is concentrated under reduced pressure using a rotary evaporator to obtain a CXS component. The obtained CXS component is precisely weighed (this "weight of the CXS component" is designated as "b"). The weight ratio of the CXIS component in the sample and the weight ratio of the CXS component are calculated by the following formula using the values ​​a and b. Weight ratio of CXS component (weight%)=(b / a)×100 Weight ratio of CXIS component (weight%)=100−weight ratio of CXS component (weight%)

2. The propylene resin composition according to claim 1 , wherein the pillar is an automobile pillar.

3. The propylene resin composition according to claim 1, wherein the washer tank is a washer tank for an automobile.

4. The propylene resin composition according to claim 1, wherein the recycled propylene resin composition A contains a propylene homopolymer.

5. The propylene resin composition according to claim 1 , wherein the recycled propylene resin composition B comprises a propylene homopolymer.

6. The propylene resin composition according to claim 1, wherein the recycled propylene resin composition A contains an inorganic filler.

7. The propylene resin composition according to claim 1, wherein the recycled propylene resin composition B contains an inorganic filler.

8. The propylene resin composition according to claim 1, comprising 25% by weight to 50% by weight of resin composition A, 10% by weight to 50% by weight of resin composition B, and 25% by weight to 65% by weight of resin composition C.

9. The propylene resin composition according to claim 1, wherein the bumper is an automobile bumper.

10. The propylene resin composition according to claim 1 , wherein the recycled propylene resin composition C comprises a propylene homopolymer.

11. The propylene resin composition according to claim 1, wherein the recycled propylene resin composition C contains an inorganic filler.

12. A propylene resin composition comprising the propylene resin composition according to claim 1 and an ethylene-α-olefin copolymer D.

13. A propylene resin composition comprising the propylene resin composition according to claim 1 and virgin propylene polymer F.

14. A propylene resin composition comprising the propylene resin composition according to claim 1 and a filler G.

15. The propylene resin composition according to claim 14, comprising an inorganic filler as the filler G.

16. The propylene resin composition according to claim 14, comprising recycled fillers as filler G.

17. IZOD impact strength measured at -30°C is 4.2 kJ / m ２ The propylene resin composition according to claim 1 .

18. IZOD impact strength measured at 23°C is 20 kJ / m ２ The propylene resin composition according to claim 1 .

19. A molded article comprising the propylene resin composition according to any one of claims 1 to 18.

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