Molded body

Abstract

Conventional molded articles formed from thermoplastic elastomer compositions may have an unsatisfactory tactile feel, such as being too soft to the touch or feeling sticky. This disclosure provides a molded article formed from a thermoplastic elastomer composition that has a good tactile feel. [Solution] A molded body formed from a thermoplastic elastomer composition, having a surface region with an arithmetic mean height (Sa) of 30 to 100 μm, as measured by a method compliant with ISO 25178-2:2012.

Description

[Technical Field]

[0001] This disclosure relates to molded articles. [Background technology]

[0002] Conventionally, automotive interior materials having a textured or leather-grained pattern are known (see, for example, Patent Document 1). Thermoplastic elastomer compositions are sometimes used as forming materials for automotive interior materials (see, for example, Patent Document 2). [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2000-229356 [Patent Document 2] International Publication No. 2011 / 155571 [Overview of the project] [Problems that the invention aims to solve]

[0004] Conventional molded articles formed from thermoplastic elastomer compositions may have an unsatisfactory tactile feel, such as being too soft to the touch or feeling sticky. This disclosure aims to provide a molded article formed from a thermoplastic elastomer composition that has a good tactile feel. [Means for solving the problem]

[0005] One embodiment of the molded article of the present disclosure is formed from a thermoplastic elastomer composition and has a surface region having an arithmetic mean height (Sa) of 30 to 100 μm, as measured by a method in accordance with ISO 25178-2:2012. [Effects of the Invention]

[0006] One embodiment of the molded article of the present disclosure is a molded article having a good tactile feel, formed from a thermoplastic elastomer composition. [Brief explanation of the drawing]

[0007] [Figure 1] Figure 1 shows an example of a height map image of one embodiment of a surface region. [Figure 2] Figure 2 shows an example of a height map image of one embodiment of a surface region. [Modes for carrying out the invention]

[0008] In this specification, a numerical range indicated by "~" means a range that includes the numbers written before and after "~" as the lower and upper limits. In this specification, if the units of the numbers written before and after the "~" indicating a numerical range are the same, the unit of the number written before "~" may be omitted.

[0009] In this specification, homopolymers and copolymers are sometimes referred to simply as "polymers." In other words, the term "polymer" can refer to either homopolymers or copolymers.

[0010] [Molded body] The molded articles of this disclosure (hereinafter also referred to as "the molded articles") are formed from a thermoplastic elastomer composition and have a surface region having an arithmetic mean height (Sa) of 30 to 100 μm, as measured by a method in accordance with ISO 25178-2:2012. The aforementioned surface region of this molded body is normally exposed to the external environment.

[0011] Hereafter, the above surface region will also be referred to as the "surface region (S)". The arithmetic mean height (Sa) of the surface region (S) is 30 to 100 μm, preferably 30 to 90 μm, more preferably 30 to 80 μm, even more preferably 30 to 70 μm, and particularly preferably 40 to 70 μm. Surface regions where Sa is above the lower limit can exhibit a good fabric-like feel and appearance, being soft and less sticky, and having less stickiness, for example, that originates from thermoplastic elastomer compositions. Surface regions where Sa is below the upper limit have excellent tactile properties. Details of the measurement conditions for Sa are described in the Examples section.

[0012] The maximum height (Sz) of the surface region (S), measured according to ISO 25178-2:2012, is preferably 130 to 600 μm, more preferably 160 to 550 μm, even more preferably 200 to 450 μm, and particularly preferably 300 to 450 μm. Such a surface region can exhibit the above-mentioned fabric feel. Details of the measurement conditions for Sz are described in the Examples section.

[0013] The ratio (static friction coefficient / dynamic friction coefficient) in the surface region (S) is preferably 1.2 to 2.6, more preferably 1.4 to 2.4, and even more preferably 1.6 to 2.2. The smaller the ratio (static friction coefficient / dynamic friction coefficient), the less sticky the surface region (S) tends to feel when touched by hand. The coefficient of dynamic friction in the surface region (S) is preferably 0.33 to 0.95, more preferably 0.34 to 0.75, and even more preferably 0.35 to 0.55. The static and dynamic friction coefficients are measured using a static / dynamic friction measuring instrument under the following conditions: sliding speed: 100 mm / sec, load: 50 gf, and sliding distance: 50 mm. Details of the measurement conditions are described in the Examples section. The above friction coefficients can be adjusted, for example, by controlling the contact area with the finger using Sa.

[0014] The Shore A hardness (10 - second value) of the surface area (S) is preferably 40 to 85, more preferably 50 to 83, and even more preferably 60 to 80. Such a molded body is excellent in the balance between a soft touch and scratch resistance. The Shore A hardness is measured at 23°C by a method conforming to JIS K6253 - 3:2023. Details of the measurement conditions are described in the Examples section. The Shore A hardness can be adjusted, for example, by the content of the softening agent (C).

[0015] The surface area (S) preferably has a plurality of convex or concave first linear portions extending in the first direction. The plurality of first linear portions are preferably arranged substantially parallel to each other in a direction perpendicular to the first direction. The first linear portion is a portion that linearly extends in the first direction when the surface area (S) is viewed in plan view. "Viewing the surface area (S) in plan view" means viewing the surface area (S) along its normal direction.

[0016] In one embodiment, the surface area (S) has a plurality of convex first linear portions. Here, the plurality of convex first linear portions are preferably arranged substantially parallel to each other in a direction perpendicular to the first direction. In one embodiment, the surface area (S) has a plurality of concave first linear portions. Here, the plurality of concave first linear portions are preferably arranged substantially parallel to each other in a direction perpendicular to the first direction. In one embodiment, the surface area (S) has a plurality of convex first linear portions and a plurality of concave first linear portions respectively. Here, the convex first linear portions and the concave first linear portions are arranged alternately in a direction perpendicular to the first direction.

[0017] In this specification, "substantially parallel" includes not only strict parallelism but also cases where the angle formed between them is, for example, 40° or less, 30° or less, 20° or less, 10° or less, or 5° or less.

[0018] The average spacing between convex first linear portions (e.g., the convex portions shown below) or concave first linear portions (e.g., the concave portions shown below) in a direction perpendicular to the first direction is preferably 1500 to 4000 μm, more preferably 1700 to 4000 μm, and in one embodiment, even more preferably 1900 to 4000 μm, even more preferably 2000 to 3900 μm, particularly preferably 2500 to 3850 μm, and especially preferably 3000 to 3800 μm. Such a surface region can exhibit a good fabric-like feel and appearance from the viewpoint of softness and low stickiness, and has less stickiness, for example, that originates from thermoplastic elastomer compositions.

[0019] The average width of the convex first linear portion (e.g., the convex portion shown below) or the concave first linear portion (e.g., the concave portion shown below) is preferably 200 to 3000 μm, more preferably 250 to 2000 μm, even more preferably 300 to 1600 μm, and in one embodiment, even more preferably 350 to 1300 μm, and particularly preferably 400 to 1000 μm. Such a surface region can exhibit a good fabric feel from the viewpoint of a less sticky tactile feel and appearance. In the case where the convex first linear portion and the concave first linear portion are arranged alternately in a direction perpendicular to the first direction, it is sufficient that the average width of either the convex first linear portion or the concave first linear portion is within the above range, and the average width of the other may be within the above range or outside the above range.

[0020] The surface region (S) may have multiple convex portions and concave portions extending in the first direction as first linear portions. The convex portions and concave portions are each first linear portions. The convex portions and concave portions are arranged alternately in a direction perpendicular to the first direction. In this case, the surface region (S) has, for example, a striped pattern of bumps and dips.

[0021] The surface region (S) may further have a plurality of convex or concave second linear portions extending in a second direction intersecting the first direction. If the first linear portion is convex, it is preferable that the second linear portion is also convex, and if the first linear portion is concave, it is preferable that the second linear portion is also concave. The angle between the first direction and the second direction is preferably 5° to 90°, more preferably 10° to 90°, even more preferably 20° to 90°, even more preferably 30° to 90°, and particularly preferably 40° to 90°.

[0022] It is preferable that the multiple second linear portions are arranged substantially parallel to each other in a direction perpendicular to the second direction. The second linear portions are portions that extend linearly in the second direction when the surface region (S) is viewed from above.

[0023] The average spacing between the second linear portions in the direction perpendicular to the second direction is preferably 1500 to 4000 μm, more preferably 1700 to 4000 μm, even more preferably 1900 to 4000 μm, even more preferably 2000 to 3900 μm, particularly preferably 2500 to 3850 μm, and especially preferably 3000 to 3800 μm. Such a surface region can exhibit a good fabric-like feel and appearance from the viewpoint of being soft and less sticky, and has less stickiness, for example, that originates from thermoplastic elastomer compositions.

[0024] The average width of the second linear portion is preferably 200 to 3000 μm, more preferably 250 to 2000 μm, even more preferably 300 to 1600 μm, even more preferably 350 to 1300 μm, and particularly preferably 400 to 1000 μm. Such a surface region can exhibit a good fabric-like feel in terms of tactile sensation and appearance, with less stickiness.

[0025] When the surface region (S) has a first linear portion and a second linear portion, both the first linear portion and the second linear portion may be convex portions and the region enclosed by the first linear portion and the second linear portion may be concave portions, or both the first linear portion and the second linear portion may be concave portions and the region enclosed by the first linear portion and the second linear portion may be convex portions.

[0026] The aspect ratio of the nth linear portion is preferably 3 or greater, more preferably 4 or greater, and even more preferably 5 or greater. The aspect ratio is defined as the ratio (average length of the nth linear portion in the nth direction / average width of the nth linear portion). There is no particular upper limit to the aspect ratio. For example, in the observation region, the nth linear portion may extend without interruption in the nth direction, where n = 1 or 2.

[0027] If the nth linear portion is convex, it may contain a recess in part. That is, the nth linear portion is convex if a convex linear portion is observed when the surface region (S) is observed as a whole, and it may contain a recess in part. The height of the convex nth linear portion may change in the nth direction, and it may be interrupted in the middle. The surface region (S) may have multiple convex nth linear portions on a hypothetical line along the nth direction. If the nth linear portion is concave, it may contain a convex portion. That is, the nth linear portion is concave if a concave linear portion is observed when the surface region (S) is observed as a whole, and it may contain a convex portion. The concave nth linear portion may have varying depths in the nth direction and may be interrupted in the middle. The surface region (S) may have multiple concave nth linear portions on a hypothetical line along the nth direction. Here, n = 1 or 2.

[0028] The size of the surface area (S) (size of the measurement area Sa) is not particularly limited, but is preferably at least 5 cm. 2 , more preferably at least 10 cm 2 More preferably, at least 15 cm 2 The upper limit of the surface area (S) size is not particularly limited and can be set according to the size of the molded body. The upper limit of the measurement area size in a single measurement is not particularly limited, for example, 50 cm 2 But that's fine.

[0029] The uneven shape of the linear parts, average spacing, average width, aspect ratio, and the angle between the first and second directions in the surface region (S) are confirmed or measured using roughness analysis software on a height map image (three-dimensional shape data) obtained by photographing the surface region (S) with a one-shot 3D shape measuring machine. In a height map image, areas with greater height in the surface region (S) are displayed brighter, while areas with less height (greater depth) are displayed darker. In a height map image, bright areas typically correspond to convex areas, and dark areas correspond to concave areas.

[0030] The average interval between first linear segments is obtained as the arithmetic mean of 10 intervals between first linear segments, arbitrarily selected from the heightmap image. The interval between first linear segments refers to the interval between centerlines extending in the first direction, passing through the center of the first linear segment in a direction perpendicular to the first direction. The average interval between second linear segments is defined similarly. The average width of the first linear region is obtained as the arithmetic mean of the widths of 10 arbitrarily selected first linear regions from the heightmap image. The width of the first linear region is the size of the first linear region in the direction perpendicular to the first direction. The average width of the second linear region is defined similarly. The average length of the first linear region is obtained as the arithmetic mean of the lengths in the first direction of 10 arbitrarily selected first linear regions from the heightmap image. The average length of the second linear region is defined similarly.

[0031] The surface region (S) preferably has a fabric-like pattern. Examples of fabric-like patterns include mesh patterns and stripe patterns. Examples of fabric-like patterns include at least one pattern selected from the group consisting of plain weave, twill weave, satin weave, and twisted weave.

[0032] Figure 1 shows an example of a height map image of one embodiment of a surface region (S). The surface region (S) has a plurality of convex first linear portions (convex portions) 10 and concave first linear portions (concave portions) 12, each extending in a first direction. The convex portions 10 and concave portions 12 are arranged alternately. The spacing between the convex portions 10 is represented by D1, and the spacing between the concave portions 12 is represented by D2. The width of the convex portions 10 is represented by W1, and the width of the concave portions 12 is represented by W2.

[0033] Figure 2 shows an example of a height map image of one embodiment of a surface region (S). The surface region (S) has multiple first linear portions (convex portions) 10 extending in a first direction and multiple second linear portions (convex portions) 20 extending in a second direction. The spacing between the first linear portions 10 is represented by D3, and the spacing between the second linear portions 20 is represented by D4. The width of the first linear portions 10 is represented by W3, and the width of the second linear portions 20 is represented by W4.

[0034] A molded article having a surface region (S) can be manufactured, for example, by preparing a mold having a surface shape complementary to the uneven shape of the surface region (S), and transferring the surface shape of the mold to the surface of a thermoplastic elastomer composition or a molded article formed from the composition. In this way, an uneven shape, such as that of a fabric, can be imparted to the surface of a molded article formed from a thermoplastic elastomer composition. For example, a mold having a surface shape complementary to the surface shape can be manufactured based on three-dimensional (3D) information obtained by scanning the surface shape of a fabric. The mold can be manufactured, for example, by laser etching.

[0035] (Thermoplastic elastomer composition) This molded article has a surface region (S). This molded article is formed from a thermoplastic elastomer composition. Because this molded article is formed from a thermoplastic elastomer and has a surface region (S), it has a good tactile feel, for example, it feels soft and less sticky when touched by hand, giving it a high-quality appearance.

[0036] As the thermoplastic elastomer composition, conventionally known thermoplastic elastomer compositions such as olefin-based thermoplastic elastomers can be used. From the viewpoint of the tactile feel (softness, stickiness) and scratch resistance of the molded article, the thermoplastic elastomer composition preferably contains a propylene polymer (A), an ethylene-α-olefin copolymer (B), a softening agent (C), and a hydrogenated block copolymer (D), and more preferably further contains a polyorganosiloxane (E).

[0037] <Propylene-based polymer (A)> The propylene polymer (A) (hereinafter also referred to as "component (A)") is a polymer in which the content of propylene-derived constituent units among the polymerizable monomer-derived constituent units constituting the polymer is 50 mol% or more. The content of propylene-derived constituent units in component (A) is preferably 70 mol% or more, more preferably 80 mol% or more, and even more preferably 90 mol% or more. The content of each constituent unit in component (A) is: 13 It is measured by 13C-NMR.

[0038] Component (A) may be a propylene homopolymer or a copolymer of propylene and a comonomer other than propylene. The comonomer may be any monomer copolymerizable with propylene, and α-olefins having 2 or 4 to 10 carbon atoms are preferred. Examples of comonomers include ethylene, 1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene, and 1-decene. Among these, at least one selected from the group consisting of ethylene, 1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene, 1-heptene, and 1-octene is preferred. There may be one comonomer or two or more comonomers.

[0039] The content of comonomer-derived structural units in the above copolymer is 50 mol% or less of the polymerizable monomer-derived structural units constituting the copolymer, preferably 30 mol% or less, more preferably 20 mol% or less, even more preferably 10 mol% or less, preferably 0.1 mol% or more, more preferably 1 mol% or more, for example, 0.1 to 50 mol%.

[0040] The structure of component (A) is not particularly limited; for example, the propylene-derived constituent unit may be an isotactic, syndiotactic, or atactic structure, but an isotactic structure is preferred. If component (A) is the above copolymer, it may be random, block, or graft type.

[0041] The melt flow rate (MFR) of component (A) is preferably 0.1 to 100 g / 10 min, more preferably 0.3 to 50 g / 10 min, and even more preferably 0.5 to 20 g / 10 min. Component (A) having such an MFR is preferable for obtaining a thermoplastic elastomer composition suitable for obtaining molded articles with superior tactile feel and scratch resistance. The MFR of component (A) is measured under conditions of 230°C and a 2.16 kg load by a method in accordance with ASTM D1238.

[0042] Component (A) may be a crystalline polymer or an amorphous polymer. Crystallinity means that a melting point (Tm) is observed in differential scanning calorimetry (DSC). If component (A) is a crystalline polymer, its melting point is preferably 100°C or higher, more preferably 120°C or higher, preferably 180°C or lower, more preferably 170°C or lower, for example, 100 to 180°C, from the viewpoint of heat resistance, etc. The melting point of component (A) is the melting peak temperature measured by the method in accordance with JIS K7121:2012 (DSC, using a test piece conditioned under 3.(2) (cooling rate of 10°C per minute), and measured under the conditions of 8.6(1) (heating rate of 10°C per minute)).

[0043] Component (A) may be synthesized by conventionally known methods or may be a commercially available product. Component (A) may contain at least one constituent unit derived from a biomass-derived monomer (e.g., propylene, comonomer). Component (A) may be one type or two or more types.

[0044] <Ethylene-α-olefin copolymer (B)> The ethylene-α-olefin copolymer (B) (hereinafter also referred to as "component (B)") has constituent units derived from ethylene and constituent units derived from α-olefins having 3 to 20 carbon atoms.

[0045] Examples of α-olefins having 3 to 20 carbon atoms include propylene, 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene, 1-heptene, 1-octene, 1-nonene, 1-decene, 1-undecene, and 1-dodecene. Among these, α-olefins having 3 to 12 carbon atoms are preferred from the viewpoint of flexibility, at least one selected from the group consisting of propylene, 1-butene, and 1-octene is more preferred, and 1-octene is even more preferred. There may be one α-olefin or two or more.

[0046] Component (B) may be a random, block, or graft copolymer, but a random copolymer is preferred.

[0047] In component (B), with respect to 100 mol% of the total amount of ethylene-derived structural units and α-olefin-derived structural units having 3 to 20 carbon atoms, the content of ethylene-derived structural units is preferably 70 to 99 mol%, more preferably 75 to 97 mol%, and even more preferably 80 to 90 mol%, and the content of α-olefin-derived structural units having 3 to 20 carbon atoms is preferably 1 to 30 mol%, more preferably 3 to 25 mol%, and even more preferably 10 to 20 mol%. Such component (B) is preferable for obtaining a thermoplastic elastomer composition suitable for obtaining a molded article with superior mechanical strength. The content ratio of each structural unit in component (B) is: 13It is measured by 13C-NMR.

[0048] Component (B) may optionally further contain constituent units derived from monomers having unsaturated bonds other than ethylene and the α-olefins mentioned above. Examples of monomers having unsaturated bonds include conjugated diolefins such as butadiene and isoprene; unconjugated diolefins such as 1,4-hexadiene; cyclic diene compounds such as dicyclopentadiene and norbornene derivatives; and acetylenes.

[0049] In component (B), the total content of ethylene-derived structural units and α-olefin-derived structural units having 3 to 20 carbon atoms among the structural units constituting the copolymer is preferably 80 mol% or more, more preferably 90 mol%, and even more preferably 95 mol% or more.

[0050] The MFR of component (B) is preferably 0.1 to 20 g / 10 min, more preferably 0.3 to 10 g / 10 min. Component (B) having such an MFR is preferred for obtaining a thermoplastic elastomer composition with a superior balance of fluidity and mechanical strength. The MFR of component (B) is measured under conditions of 190°C and a 2.16 kg load by a method in accordance with ASTM D1238.

[0051] The density of component (B) is preferably 0.8 to 0.9 g / cm³. 3 That is the case. The density of component (B) is measured according to the method compliant with ASTM D1505.

[0052] Component (B) can be produced, for example, by copolymerizing ethylene with at least α-olefins having 3 to 20 carbon atoms. Component (B) can also be produced using known polymerization catalysts such as Ziegler-Natta catalysts, vanadium-based catalysts, and metallocene catalysts. Polymerization methods include, for example, liquid-phase polymerization methods such as solution polymerization, suspension polymerization, and bulk polymerization, gas-phase polymerization, and other known polymerization methods. Component (B) may be a commercially available product. Component (B) may contain at least one constituent unit derived from a biomass-derived monomer (e.g., ethylene, α-olefin). Component (B) may be one type or two or more types.

[0053] The content of the ethylene-α-olefin copolymer (B) in the thermoplastic elastomer composition is preferably 30 to 300 parts by mass, more preferably 35 to 250 parts by mass, and even more preferably 40 to 200 parts by mass, per 100 parts by mass of the propylene polymer (A). When the content of the copolymer (B) is above the lower limit, the tactile feel of the molded article tends to be better.

[0054] <Softener (C)> As the softening agent (C), for example, known softening agents that are incorporated into rubber compositions can be used. Examples of softening agents (C) include petroleum-based softening agents such as process oil, lubricating oil, petroleum asphalt, and petrolatum; coal tar-based softening agents such as coal tar and coal tar pitch; fatty oil-based softening agents such as castor oil, linseed oil, rapeseed oil, soybean oil, and coconut oil; tall oil; sub(factis); waxes such as beeswax, carnauba wax, and lanolin; fatty acids such as ricinoleic acid, palmitic acid, lauric acid, and stearic acid; fatty acid salts such as barium stearate, calcium stearate, and zinc laurate; naphthenic acid; pine oil, rosin or its derivatives; synthetic polymer-based softening agents such as terpene resins, petroleum resins, and coumarone indene resins; and ester-based softening agents such as dioctyl phthalate, dioctyl adipate, and dioctyl sebacate.

[0055] Among these, from the viewpoint of compatibility between the softener (C) and the propylene polymer (A) and the ethylene-α-olefin copolymer (B), process oil is preferred as the softener (C), and process oil composed of paraffinic, naphthenic, or aromatic hydrocarbons is more preferred. Among the softeners (C), paraffinic process oil is preferred from the viewpoint of weather resistance or colorability, and naphthenic process oil is preferred from the viewpoint of compatibility. From the viewpoint of thermal and light stability, the content of aromatic hydrocarbons in the process oil is preferably 10% or less, more preferably 5% or less, and even more preferably 1% or less, in terms of the carbon number ratio specified in ASTM D2140-97.

[0056] The softening agent (C) may be one type or two or more types. The softening agent (C) may be a softening agent manufactured using at least one type of biomass raw material. The content of the softening agent (C) in the thermoplastic elastomer composition is preferably 45 to 300 parts by mass, more preferably 45 to 290 parts by mass, and even more preferably 50 to 280 parts by mass, per 100 parts by mass of the propylene polymer (A).

[0057] The ratio (C / B) of the content of the softener (C) to the content of the ethylene-α-olefin copolymer (B) in the thermoplastic elastomer composition is preferably greater than 0 and less than 3, more preferably greater than 0.6 and 2.8 or less, and even more preferably greater than 0.7 and 2.7 or less, on a mass basis.

[0058] <Hydrogenated block copolymer (D)> The hydrogenated block copolymer (D) (hereinafter also referred to as "component (D)") is a hydrogenated block copolymer having at least one block mainly containing structural units derived from a conjugated diene and at least one block mainly containing structural units derived from a vinyl aromatic compound. In component (D), at least a portion of the structural units derived from the conjugated diene are hydrogenated (hereinafter also referred to as "hydrogenation").

[0059] Blocks mainly containing structural units derived from conjugated dienes will also be referred to as "conjugated diene polymer blocks" below. Blocks mainly containing structural units derived from vinyl aromatic compounds will also be referred to as "vinyl aromatic polymer blocks" below.

[0060] "Constituent units derived from conjugated dienes" refers to constituent units resulting from the polymerization of conjugated dienes, which are monomers. "Constituent units derived from vinyl aromatic compounds" refers to constituent units resulting from the polymerization of vinyl aromatic compounds, which are monomers.

[0061] A "block mainly containing conjugated diene-derived structural units (or vinyl aromatic compound-derived structural units)" refers to a block containing more than 50% by mass of conjugated diene-derived structural units (or vinyl aromatic compound-derived structural units) in the block. The content ratio of conjugated diene-derived structural units (or vinyl aromatic compound-derived structural units) in the above block may be, for example, 55% by mass or more.

[0062] A conjugated diene is a diolefin having one pair of conjugated double bonds. Examples of conjugated dienes include 1,3-butadiene (butadiene), 2-methyl-1,3-butadiene (isoprene), 2,3-dimethyl-1,3-butadiene, 1,3-pentadiene, 2-methyl-1,3-pentadiene, and 1,3-hexadiene. Among these, butadiene and / or isoprene are preferred from the viewpoint of economy and other factors. One conjugated diene may be used, or two or more may be used.

[0063] Examples of vinyl aromatic compounds include styrene, α-methylstyrene, p-methylstyrene, divinylbenzene, 1,1-diphenylethylene, N,N-dimethyl-p-aminoethylstyrene, and N,N-diethyl-p-aminoethylstyrene. Among these, styrene is preferred from the viewpoint of economy and other factors. One vinyl aromatic compound may be used, or two or more may be used. Component (D) may contain a constituent unit derived from at least one biomass-derived monomer (e.g., a conjugated diene, a vinyl aromatic compound).

[0064] The arrangement of each block in component (D) is not particularly limited, and any suitable one can be adopted as appropriate. For example, a vinyl aromatic polymer block is represented by S, and a polymer block in which at least a part of the conjugated diene polymer block is hydrogenated is represented by B. In this case, examples of component (D) include, for example, SB, S(BS) n1 (where n1 represents an integer from 1 to 3), and S(BSB) n2 (where n2 represents an integer from 1 to 2), etc. are linear block copolymers represented by; (SB) n3 X(where n3 represents an integer from 3 to 6, and X represents a coupling agent residue such as silicon tetrachloride, tin tetrachloride, and polyepoxy compounds). Examples of the copolymer represented by. Among these, linear block copolymers of the 2-type (diblock) of SB, the 3-type (triblock) of SBS, or the 4-type (tetrablock) of SBSB are preferred.

[0065] The polymer block B may be a hydrogenated product of a polymer block consisting only of structural units derived from a conjugated diene, or may be a hydrogenated product of a copolymer block mainly containing structural units derived from a conjugated diene and further containing structural units derived from a vinyl aromatic compound (obtained by copolymerizing a conjugated diene and a vinyl aromatic compound). In any polymer block, at least a part of the structural units derived from the conjugated diene is hydrogenated.

[0066] From the viewpoint of abrasion resistance and the like, the copolymer block is preferably a copolymer block mainly containing structural units derived from a conjugated diene and further containing structural units derived from a vinyl aromatic compound. From the viewpoint of the balance between mechanical strength and impact resistance, etc., the content ratio of the structural units derived from the conjugated diene in the copolymer block is preferably more than 50% by mass and 90% by mass or less, more preferably more than 50% by mass and 80% by mass or less, and the content ratio of the structural units derived from the vinyl aromatic compound is preferably 10% by mass or more and less than 50% by mass, more preferably 20% by mass or more and less than 50% by mass. Component (D) preferably includes a polymer in which the above block, which mainly contains structural units derived from a conjugated diene, is a copolymer block further containing structural units derived from a vinyl aromatic compound.

[0067] The content of constituent units derived from vinyl aromatic compounds in component (D) is preferably 10 to 80% by mass, more preferably 20 to 75% by mass, and even more preferably 30 to 70% by mass. The content of constituent units derived from conjugated dienes, at least partially hydrogenated, in component (D) is preferably 20 to 90% by mass, more preferably 25 to 80% by mass, and even more preferably 30 to 70% by mass. By increasing the content of constituent units derived from vinyl aromatic compounds to 10% by mass or more, the mechanical properties can be further improved, and by decreasing it to 80% by mass or less, the low-temperature properties can be further improved. The content of each constituent unit, including those derived from vinyl aromatic compounds, in component (D) is measured by nuclear magnetic resonance spectroscopy (NMR).

[0068] The content of vinyl aromatic polymer blocks in component (D) is preferably 10% by mass or more, more preferably 10 to 70% by mass, and even more preferably 10 to 40% by mass, from the viewpoint of mechanical strength and the like. The content of vinyl aromatic polymer blocks is defined by the following formula, using the mass of vinyl aromatic polymer blocks obtained by oxidative decomposition of the block copolymer before hydrogenation using tert-butyl hydroperoxide with osmium tetroxide as a catalyst (the method described in IM Kolthoff, et al., J. Polym. Sci. 1, 429 (1946), hereinafter also referred to as the "osmium tetroxide decomposition method") (where vinyl aromatic polymer blocks with an average degree of polymerization of about 30 or less are excluded). The percentage of vinyl aromatic polymer blocks (by mass) = [(Mass of vinyl aromatic polymer blocks in the block copolymer before hydrogenation) / (Mass of the block copolymer before hydrogenation)] × 100

[0069] If multiple polymer blocks exist in component (D), the molecular weight or composition and other structural properties of each polymer block may be the same or different. For example, component (D) may contain a hydrogenated copolymer block containing structural units derived from a conjugated diene and structural units derived from a vinyl aromatic compound, and a hydrogenated polymer block mainly containing structural units derived from a conjugated diene.

[0070] The boundaries and ends of each polymer block in component (D) do not necessarily need to be clearly distinguishable. The distribution of constituent units derived from vinyl aromatic compounds in each polymer block is not particularly limited and may be uniform, tapered, stepped, convex, or concave.

[0071] Crystalline portions may be present within the polymer block.

[0072] The method for producing the block copolymer before hydrogenation in component (D) is not particularly limited, and known methods can be employed. Examples of such production methods include those described in Japanese Patent Publication No. 36-019286, Japanese Patent Publication No. 43-017979, Japanese Patent Publication No. 46-032415, Japanese Patent Publication No. 49-036957, Japanese Patent Publication No. 48-002423, Japanese Patent Publication No. 48-004106, Japanese Patent Publication No. 56-028925, Japanese Unexamined Patent Publication No. 59-166518, and Japanese Unexamined Patent Publication No. 60-186577.

[0073] Component (D) may have a polar group. Examples of polar groups include hydroxyl groups, carboxyl groups, carbonyl groups, thiocarbonyl groups, acid halide groups, acid anhydride groups, thiocarboxylic acid groups, aldehyde groups, thioaldehyde groups, carboxylic acid ester groups, amide groups, sulfonic acid groups, sulfonic acid ester groups, phosphoric acid groups, phosphoric acid ester groups, amino groups, imino groups, nitrile groups, pyridyl groups, quinoline groups, epoxy groups, thioepoxy groups, sulfide groups, isocyanate groups, isothiocyanate groups, silicon halide groups, alkoxysilicon groups, tin halide groups, boronic acid groups, boron-containing groups, boronic acid bases, alkoxytin groups, and phenyltin groups.

[0074] The amount of vinyl bonded in the conjugated diene-derived structural units in the block copolymer before hydrogenation is preferably 5 mol% or more from the viewpoint of flexibility and scratch resistance, and preferably 70 mol% or less from the viewpoint of productivity, elongation at break, and scratch resistance. More preferably, the amount of vinyl bonded in the conjugated diene-derived structural units is 10 to 50 mol%, even more preferably 10 to 45 mol%, and particularly preferably 10 to 40 mol%.

[0075] The vinyl bond amount refers to the ratio of the total amount of conjugated diene-derived structural units incorporated via 1,2- and 3,4-bonds to the total amount of conjugated diene-derived structural units incorporated via 1,2- and 3,4-bonds in the block copolymer before hydrogenation. The vinyl bond amount is measured by NMR.

[0076] The distribution of vinyl units derived from conjugated dienes in each polymer block within component (D) is not particularly limited, and for example, the distribution may be biased. Methods for controlling the distribution of vinyl units include, for example, adding a vinylizing agent during polymerization and changing the polymerization temperature.

[0077] In component (D), from the viewpoint of heat resistance, aging resistance, and weather resistance, preferably 75 mol% or more, more preferably 85 mol% or more, and even more preferably 97 mol% or more of the unsaturated bonds contained in the constituent units derived from the conjugated diene before hydrogenation are hydrogenated. The hydrogenation rate is measured by NMR.

[0078] The distribution of hydrogenation of the conjugated diene-derived constituent units in component (D) is not particularly limited, and for example, the distribution may be biased. The hydrogenation distribution can be controlled, for example, by changing the distribution of vinyl units; or by copolymerizing isoprene and butadiene and then hydrogenating with a hydrogenation catalyst, utilizing the difference in hydrogenation rates between isoprene units and butadiene units.

[0079] Block copolymers can be hydrogenated, for example, using a hydrogenation catalyst. Examples of hydrogenation catalysts include (1) supported heterogeneous hydrogenation catalysts in which metals such as Ni, Pt, Pd, and Ru are supported on carriers such as carbon, silica, alumina, and diatomaceous earth; (2) so-called Ziegler-type hydrogenation catalysts using organic acid salts of Ni, Co, Fe, or Cr, or transition metal salts such as acetylacetone salts, and reducing agents such as organoaluminum; and (3) homogeneous hydrogenation catalysts such as so-called organometallic complexes such as organometallic compounds of Ti, Ru, Rh, or Zr.

[0080] Specific hydrogenation catalysts that can be used include those described in Japanese Patent Publication No. 42-008704, Japanese Patent Publication No. 43-006636, Japanese Patent Publication No. 63-004841, Japanese Patent Publication No. 01-037970, Japanese Patent Publication No. 01-053851, and Japanese Patent Publication No. 02-009041, etc. Among these, a preferred hydrogenation catalyst is a reaction mixture of a titanocene compound and a reducing organometallic compound.

[0081] As titanocene compounds, for example, compounds described in Japanese Patent Publication No. 08-109219 can be used. Specific examples include compounds having one or more ligands with a (substituted) cyclopentadienyl skeleton, indenyl skeleton, or fluorenyl skeleton, such as bis(cyclopentadienyl)titanium dichloride and mono(pentamethylcyclopentadienyl)titanium trichloride.

[0082] Examples of reducing organometallic compounds include organoalkali metal compounds such as organolithium, organomagnesium compounds, organoaluminum compounds, organoboron compounds, and organozinc compounds.

[0083] The weight-average molecular weight (Mw) of component (D) before crosslinking is preferably 50,000 or more from the viewpoint of scratch resistance, preferably 400,000 or less from the viewpoint of moldability, and more preferably 50,000 to 300,000. The molecular weight distribution (Mw / Mn: weight-average molecular weight / number-average molecular weight) of component (D) before crosslinking is preferably close to 1 from the viewpoint of scratch resistance. Mw and Mn are calculated as polystyrene-equivalent molecular weight by gel permeation chromatography (GPC), and details of GPC are described in the Examples section.

[0084] Component (D) may be one type or two or more types. The content of hydrogenated block copolymer (D) in the thermoplastic elastomer composition is preferably 50 to 400 parts by mass, more preferably 60 to 280 parts by mass, and even more preferably 70 to 250 parts by mass, per 100 parts by mass of propylene polymer (A).

[0085] <Polyorganosiloxane (E)> The thermoplastic elastomer composition preferably further contains polyorganosiloxane (E) (hereinafter also referred to as "component (E)"). Molded articles formed from thermoplastic elastomer compositions containing component (E) exhibit superior scratch resistance. From the viewpoint of abrasion resistance or tactile feel of the molded article, a linear, branched, or crosslinked polymer structure is preferred for component (E).

[0086] Component (E) is preferably a polymer containing siloxane units having substituents such as alkyl groups, vinyl groups, and aryl groups. Examples of alkyl groups include C1-C5 alkyl groups such as methyl groups and ethyl groups. Examples of aryl groups include C6-C10 aryl groups such as phenyl groups.

[0087] Among these, polyorganosiloxanes having alkyl groups are preferred, and polyorganosiloxanes having methyl groups are more preferred. Examples of polyorganosiloxanes having methyl groups include polydimethylsiloxane, polymethylphenylsiloxane, and polymethylhydrogensiloxane. Among these, polydimethylsiloxane is preferred.

[0088] The kinematic viscosity of component (E) is preferably 5,000 centistokes (cSt) or higher from the viewpoint of wear resistance and scratch resistance. The kinematic viscosity of component (E) is preferably less than 3 million cSt from the viewpoint that the dispersibility of component (E) in the resulting thermoplastic elastomer composition tends to improve, resulting in a superior appearance and further improving the quality stability during melt extrusion. The kinematic viscosity of component (E) is more preferably 10,000 cSt or more and less than 3 million cSt, and even more preferably 50,000 cSt or more and less than 3 million cSt. The kinematic viscosity is measured at 25°C by a method in accordance with JIS Z8803:2011.

[0089] Component (E) may be one type or two or more types. When the thermoplastic elastomer composition contains polyorganosiloxane (E), the content of polyorganosiloxane (E) is preferably 2 parts by mass or more, more preferably 2.2 to 25 parts by mass, and even more preferably 2.5 to 20 parts by mass, per 100 parts by mass of propylene polymer (A).

[0090] <Organic peroxide (F)> The thermoplastic elastomer composition preferably further contains an organic peroxide (F) (hereinafter also referred to as "component (F)"). When the thermoplastic elastomer composition containing component (F) is dynamically heat-treated, component (F) acts, for example, as a crosslinking initiator between the propylene polymer (A) and the ethylene-α-olefin copolymer (B) in the composition.

[0091] Component (F) is, for example, 1,1-bis(t-butylperoxy)-3,3,5-trimethylcyclohexane, 1,1-bis(t-hexylperoxy)-3,3,5-trimethylcyclohexane, 1,1-bis(t-hexylperoxy)cyclohexane, 1,1-bis(t-butylperoxy)cyclododecane, 1,1-bis(t-butylperoxy)cyclohexane, 2,2-bis(t-butylperoxy)octane, n-butyl-4,4-bis(t-butylperoxy)butane, and n-butyl-4,4-bis(t- Peroxyketals such as butylperoxy)valerate; dialkylperoxides such as di-t-butylperoxide, dicumylperoxide, t-butylcumylperoxide, α,α'-bis(t-butylperoxy-m-isopropyl)benzene, α,α'-bis(t-butylperoxy)diisopropylbenzene, 2,5-dimethyl-2,5-bis(t-butylperoxy)hexane, and 2,5-dimethyl-2,5-bis(t-butylperoxy)hexine-3; acetylperoxide, isobutylylperoxide Diacyl peroxides such as octanoyl peroxide, decanoyl peroxide, lauroyl peroxide, 3,5,5-trimethylhexanoyl peroxide, benzoyl peroxide, 2,4-dichlorobenzoyl peroxide, and m-trioyl peroxide; t-butyl peroxyacetate, t-butyl peroxyisobutyrate, t-butyl peroxy-2-ethylhexanoate, t-butyl peroxylaurate, t-butyl peroxybenzoate, di-t-butyl peroxy Examples include peroxyesters such as isophthalates, 2,5-dimethyl-2,5-di(benzoylperoxy)hexane, t-butylperoxymaleic acid, t-butylperoxyisopropyl carbonate, and cumylperoxyoctate; and hydroperoxides such as t-butyl hydroperoxide, cumene hydroperoxide, diisopropylbenzene hydroperoxide, 2,5-dimethylhexane-2,5-dihydroperoxide, and 1,1,3,3-tetramethylbutylperoxide.

[0092] Among these, at least one selected from the group consisting of 1,1-bis(t-butylperoxy)-3,3,5-trimethylcyclohexane, di-t-butyl peroxide, dicumyl peroxide, 2,5-dimethyl-2,5-bis(t-butylperoxy)hexane, and 2,5-dimethyl-2,5-bis(t-butylperoxy)hexyn-3 is preferred from the viewpoint of thermal decomposition temperature and crosslinking properties.

[0093] Component (F) may be one type or two or more types. When the thermoplastic elastomer composition contains an organic peroxide (F), the content of the organic peroxide (F) is preferably 2 to 8 parts by mass, more preferably 2 to 7 parts by mass, per 100 parts by mass of the propylene polymer (A), from the viewpoint of moldability and other factors.

[0094] <Crosslinking agent (G)> If the thermoplastic elastomer composition contains an organic peroxide (F), it is preferable that the composition further contains a crosslinking aid (G) (hereinafter also referred to as "component (G)"). Component (G) can control the crosslinking reaction rate. Examples of component (G) include monofunctional monomers and polyfunctional monomers.

[0095] As monofunctional monomers, for example, radically polymerizable vinyl monomers are preferred, including vinyl aromatic monomers, unsaturated nitrile monomers, (meth)acrylic acid ester monomers, (meth)acrylic acid monomers, maleic anhydride monomers, substituted maleic anhydride monomers, and N-substituted maleimide monomers.

[0096] Specific examples of monofunctional monomers include, for example, styrene, methylstyrene, chloromethylstyrene, hydroxystyrene, tert-butoxystyrene, acetoxystyrene, chlorostyrene, (meth)acrylonitrile, methyl (meth)acrylate, ethyl (meth)acrylate, n-butyl (meth)acrylate, isobutyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, (meth)acrylic acid, maleic anhydride, methyl maleic anhydride, 1,2-dimethyl maleic anhydride, ethyl maleic anhydride, phenyl maleic anhydride, N-methyl maleimide, N-ethyl maleimide, N-cyclohexyl maleimide, N-lauryl maleimide, and N-cetyl maleimide. Among these, at least one selected from the group consisting of styrene, (meth)acrylonitrile, methyl acrylate, maleic anhydride, and N-methyl maleimide is preferred from the viewpoint of ease of reaction and versatility. One monofunctional monomer may be used, or two or more may be used.

[0097] A polyfunctional monomer is a monomer having multiple radically polymerizable functional groups, and a plurality of monomers having vinyl groups is preferred. Examples of the above functional groups include vinyl groups, allyl groups, isopropenyl groups, (meth)acrylic groups, and maleimide groups. The number of functional groups in the polyfunctional monomer is preferably 2 to 4.

[0098] Examples of polyfunctional monomers include divinylbenzene, triallyl isocyanurate, triallyl cyanurate, diacetone di(meth)acrylamide, polyethylene glycol di(meth)acrylate, trimethylolpropane tri(meth)acrylate, ethylene glycol di(meth)acrylate, triethylene glycol di(meth)acrylate, diethylene glycol di(meth)acrylate, diisopropenylbenzene, p-quinone dioxime, p,p'-dibenzoylquinone dioxime, allyl(meth)acrylate, N,N'-m-phenylenebismaleimide, diallyl phthalate, tetraallyloxyethane, and 1,2-polybutadiene. Among these, divinylbenzene and / or triallyl isocyanurate are preferred. One polyfunctional monomer may be used, or two or more may be used.

[0099] Component (G) may be one type or two or more types. When the thermoplastic elastomer composition contains a crosslinking aid (G), the amount of the crosslinking aid (G) is preferably 1 to 100 parts by mass, more preferably 1 to 50 parts by mass, per 100 parts by mass of organic peroxide (F).

[0100] <Additives> The thermoplastic elastomer composition may further contain additives. Examples of additives include inorganic fillers, heat stabilizers, light stabilizers, antioxidants, UV absorbers, organic or inorganic pigments, flame retardants, antiblocking agents, foaming agents, antistatic agents, and antibacterial agents. There may be one or more additives. The additives may also be additives manufactured using at least one biomass raw material.

[0101] Examples of inorganic fillers include calcium carbonate, magnesium carbonate, silica, carbon black, glass fiber, titanium dioxide, clay, mica, talc, magnesium hydroxide, and aluminum hydroxide.

[0102] Examples of heat stabilizers include 2,6-di-t-butyl-4-methylphenol and octadecyl-3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate. Examples of light stabilizers include bis-[2,2,6,6-tetramethyl-4-piperidinyl]sebacate and tetrakis(2,2,6,6-tetramethyl-4-piperidinyl)-1,2,3,4-butanetetracarboxylate. Examples of antioxidants include trisnonylphenyl phosphite and distearyl pentaerythritol diphosphite. Examples of ultraviolet absorbers include 2-(2'-hydroxy-5'methylphenyl)benzotriazole and 2,4-dihydroxybenzophenone.

[0103] Examples of organic or inorganic pigments include carbon black, titanium dioxide, and phthalocyanine black. Examples of flame retardants include ammonium polyphosphate, trioctyl phosphate, and magnesium hydroxide. Examples of antiblocking agents include stearamide and erucamide. Examples of foaming agents include sodium bicarbonate and N,N'-dinitrosopentamethylenetetramine. Examples of antistatic agents include palmitate monoglyceride and stearate monoglyceride. Examples of antimicrobial agents include silver ion-supported zeolite and thiosulfite silver complexes.

[0104] <Method for producing thermoplastic elastomer compositions and their physical properties> A thermoplastic elastomer composition can be produced, for example, by mixing the above components and kneading the resulting mixture. The thermoplastic elastomer composition may be dynamically crosslinked. Dynamic crosslinking causes at least a portion of component (A), component (B), and component (D) (for example, at least a portion of component (B)). It is preferable to perform dynamic crosslinking in the presence of component (F), or in the presence of component (F) and component (G).

[0105] "Dynamic crosslinking" refers to, for example, dynamically heat-treating the above composition, and "dynamically heat-treating" refers to kneading the above composition in a molten state. With respect to a thermoplastic elastomer composition, the composition before dynamic heat treatment is also called "Composition 1," and the composition after dynamic heat treatment is also called "Composition 2."

[0106] It is preferable to use a mixing device during the mixing process. Examples of mixing devices include open-type mixing rolls, as well as closed-type Banbury mixers, extruders such as single-screw and twin-screw extruders, kneaders, and continuous mixers. The order in which each component is added during mixing is not particularly limited. Dynamic heat treatment is preferably performed in a closed-type mixing device. Dynamic heat treatment is preferably carried out under an inert gas atmosphere such as nitrogen or carbon dioxide. The heat treatment temperature is preferably in the range of above the melting point of component (A) and below 300°C, more preferably 150 to 270°C, even more preferably 170 to 250°C, and particularly preferably 180 to 230°C. The kneading time for the heat treatment is preferably 1 to 20 minutes, more preferably 1 to 10 minutes. The shear force applied during the heat treatment, expressed as a shear rate, is preferably 10 to 50,000 s. -1 , comfortable 100~10,000s -1 That is the case.

[0107] The melt flow rate (MFR) of composition 2 described above is preferably 0.1 to 100 g / 10 min, more preferably 5 to 90 g / 10 min, and even more preferably 10 to 80 g / 10 min, from the viewpoint of moldability and other factors. The MFR of composition 2 described above is measured under conditions of 230°C and a 1.2 kg load by a method in accordance with JIS K7210-1:2014 (Method A).

[0108] <Manufacturing of molded products> The molded article is formed using a thermoplastic elastomer composition by a molding method such as injection molding, press molding, extrusion molding, calendering, hollow molding, vacuum molding, or compression molding. In one embodiment of the molded article, the thermoplastic elastomer composition is a dynamically crosslinked material. Injection molding is preferred from the viewpoint of productivity and the ability to easily form complex shapes. That is, the molded article is preferably an injection-molded article.

[0109] The molded article has the surface region (S) described above. The method for forming the surface region (S) is not particularly limited, but when using injection molding, a molded article having the surface region (S) can be obtained by using a mold with a predetermined surface shape and surface processing.

[0110] [Goods] The Articles of this Disclosure (hereinafter also referred to as "the Articles") comprises the molded body. The Articles may further comprise other components together with the molded body. Examples of other components include a foamed portion and a core material portion.

[0111] This article may further comprise a foamed portion in addition to the molded body. An article comprising such a foamed portion may exhibit a softer feel. Examples of foamed portions include polyurethane foam.

[0112] The article may further comprise a core material in addition to the molded body. Examples of materials for forming the core material include resin materials such as polypropylene, acrylonitrile-butadiene-styrene (ABS) copolymer, polycarbonate / acrylonitrile-butadiene-styrene copolymer alloy (PC / ABS alloy), acrylonitrile-styrene copolymer, and modified polyphenylene oxide; and reinforcing materials obtained by mixing fillers such as talc and glass fibers into the resin material.

[0113] The article may comprise the molded body, the core material portion, and the foam portion located between the molded body and the core material portion.

[0114] The thickness of the molded body is not particularly limited, but is for example 0.5 to 10 mm. The thickness of the foamed portion is not particularly limited, but is for example 0.5 to 50 mm. The thickness of the core material portion is not particularly limited, but is for example 1 to 20 mm.

[0115] [Applications of molded products and articles] As described above, the molded body and article have a soft and non-sticky feel and can have a fabric-like appearance, for example. The uses of the molded body and article are not particularly limited, and are suitable for applications such as parts for mobile vehicles, artificial leather, lifestyle-related goods, civil engineering or building materials, electrical or electronic components, films, sheets, or foams, and are particularly suitable as parts for mobile vehicles or artificial leather.

[0116] Examples of parts for mobile vehicles such as automobiles include instrument panel upholstery, door upholstery, headliner upholstery, seat upholstery, handbrake grip, shift knob cover, seat adjustment knob, weatherstrip, bumper molding, side molding, air spoiler, air duct hose, cup holder, flapper door seal, wire harness grommet, rack and pinion boot, suspension cover boot, glass guide, inner beltline seal, roof guide, trunk lid seal, molded quarter window gasket, corner molding, glass enclosure, hood seal, glass run channel, secondary seal, various gaskets, bumper parts, body panels, side shields, glass run channels, hoses, steering wheel, boots, wire harness cover, and seat adjuster cover. Interior parts are preferred as mobile parts, and interior upholstery materials are more preferred.

[0117] Examples of artificial leather include chair upholstery, bags, school bags, belts, sashes, ribbons, notebook covers, book covers, keychains, pen cases, wallets, business card holders, commuter pass holders, sports shoes, and clothing such as jackets and coats.

[0118] Examples of lifestyle-related products include sports equipment such as sports shoe soles, ski boots, tennis rackets, ski bindings, and bat grips; and miscellaneous goods such as pen grips, toothbrush grips, hairbrushes, fashion belts, various caps, and shoe insoles.

[0119] The molded body and the article are suitable, for example, as interior materials for mobile vehicles, and more suitable as interior surface materials for mobile vehicles. That is, according to this disclosure, mobile vehicles equipped with the molded body or the article as interior materials are also provided. Examples of mobile vehicles include automobiles, trains, aircraft, and ships. Examples of interior materials include instrument panel surfaces, door surfaces, ceiling surfaces, seat surfaces, handbrake grips, shift knob covers, and seat adjustment knobs, with interior surface materials being preferred.

[0120] [Example of an embodiment] This disclosure relates, for example, to the following [1] to

[19] . [1] A molded article formed from a thermoplastic elastomer composition, having a surface region with an arithmetic mean height (Sa) of 30 to 100 μm, as measured by a method in accordance with ISO 25178-2:2012. [2] The molded article according to [1], wherein the surface region has a plurality of convex or concave first linear portions extending in a first direction, the first linear portions are arranged substantially parallel to each other in a direction perpendicular to the first direction, and the average distance between the convex first linear portions or between the concave first linear portions in a direction perpendicular to the first direction is 1500 to 4000 μm. [3] The molded article according to [2], wherein the surface region further has a plurality of convex or concave second linear portions extending in a second direction intersecting the first direction, and if the first linear portion is convex, the second linear portion is also convex, and if the first linear portion is concave, the second linear portion is also concave, and the second linear portions are arranged substantially parallel to each other in a direction perpendicular to the second direction, and the average spacing between the second linear portions in the direction perpendicular to the second direction is 1500 to 4000 μm. [4] The molded article according to any one of [1] to [3], wherein the surface region has a plurality of convex portions and concave portions extending in the first direction as a first linear portion extending in the first direction, the convex portions are arranged substantially parallel to each other in a direction perpendicular to the first direction, the concave portions are arranged substantially parallel to each other in a direction perpendicular to the first direction, the convex portions and the concave portions are arranged alternately in a direction perpendicular to the first direction, the average spacing between the convex portions in the direction perpendicular to the first direction is 1500 to 4000 μm, and the average spacing between the concave portions in the direction perpendicular to the first direction is 1500 to 4000 μm. [5] The molded article according to any one of [1] to [4], wherein the surface region has a fabric-like pattern. [6] The molded body according to [5], wherein the fabric-like pattern is at least one pattern selected from the group consisting of plain weave, twill weave, satin weave and twisted weave. [7] The molded article according to any one of [1] to [6], wherein the surface region has a Shore A hardness (10-second value) of 40 to 85 as measured by a method in accordance with JIS K6253-3:2023. [8] The molded article according to any one of [1] to [7], wherein the thermoplastic elastomer composition comprises a propylene polymer (A), an ethylene-α-olefin copolymer (B) having ethylene-derived structural units and α-olefin-derived structural units having 3 to 20 carbon atoms, a softening agent (C), and a hydrogenated block copolymer (D) having at least one block mainly containing structural units derived from a conjugated diene and one block mainly containing structural units derived from a vinyl aromatic compound. [9] The molded article according to [8], wherein the thermoplastic elastomer composition contains 30 to 300 parts by mass of the ethylene-α-olefin copolymer (B), 45 to 300 parts by mass of the softener (C), and 50 to 400 parts by mass of the hydrogenated block copolymer (D) per 100 parts by mass of the propylene polymer (A).

[10] The molded article according to [9], wherein the thermoplastic elastomer composition contains 2 parts by mass or more of polyorganosiloxane (E) per 100 parts by mass of the propylene polymer (A).

[11] The molded article according to any one of [8] to

[10] , wherein the thermoplastic elastomer composition has a ratio (C / B) of the content of the softener (C) to the content of the ethylene-α-olefin copolymer (B) that is greater than 0 and less than 3 by mass.

[12] The molded article according to any one of [8] to

[11] , wherein the hydrogenated block copolymer (D) comprises a polymer in which a block mainly containing the conjugated diene-derived structural units is a copolymer block mainly containing conjugated diene-derived structural units and further containing vinyl aromatic compound-derived structural units.

[13] The molded article according to any one of [1] to

[12] , wherein the thermoplastic elastomer composition is a dynamically crosslinked body.

[14] The molded article according to any one of [8] to

[13] , wherein at least a portion of the ethylene-α-olefin copolymer (B) is crosslinked.

[15] The molded article according to any one of [1] to

[14] above, which is an injection molded article.

[16] A molded body according to any of [1] to

[15] above, which is an interior material for a mobile body.

[17] An article comprising a molded body as described in any of [1] to

[16] above.

[18] The article according to

[17] , further comprising polyurethane foam.

[19] A mobile body comprising a molded body as described in any of [1] to

[16] above or an article as described in

[17] or

[18] above as interior material. [Examples]

[0121] The molded articles will be described in more detail below based on the examples, but the molded articles are not limited to these examples. The test methods for each component of the raw materials used in the examples and comparative examples are as follows.

[0122] [Testing methods for raw materials] <Content of constituent units and bonding units> The content of conjugated dienes or vinyl aromatic compounds, as well as 1,4-, 1,2-, and 3,4-bonding units of butadiene, in the block copolymer before hydrogenation was measured by NMR. A nuclear magnetic resonance spectrometer (JEOL, instrument name "JNM-LA400") was used as the measuring instrument, deuterated chloroform was used as the solvent, and tetramethylsilane (TMS) was used as the chemical shift standard. Measurements were performed under the following conditions: sample concentration: 50 mg / mL, observation frequency: 400 MHz, pulse delay: 2.904 seconds, number of scans: 64, pulse width: 45°, and measurement temperature: 26°C.

[0123] The percentage (mass %) of each constituent unit contained in component (B) is: 13 The values ​​were determined from measurements taken using 1C-NMR. Specifically, an ECX400P nuclear magnetic resonance spectrometer (manufactured by JEOL Ltd.) was used under the following conditions: measurement temperature: 120°C, measurement solvent: orthodichlorobenzene / deuterated benzene = 4 / 1 (volume ratio), and number of cumulative measurements: 8000. 13 The 1C-NMR spectrum was obtained, and the above-mentioned content ratio was calculated from the spectrum.

[0124] <Styrene polymer block content (Os value)> The content of blocks (styrene polymer blocks) mainly consisting of styrene-derived structural units in component (D) was measured using the block copolymer before hydrogenation by the method described in IM Kolthoff, et al., J. Polym. Sci. 1, 429 (1946) (osmium tetroxide decomposition method). A 0.1 g / 125 mL tertiary butanol solution of osmium acid was used for the decomposition of the block copolymer before hydrogenation. The content of styrene polymer blocks was calculated using the following formula. The content of styrene polymer blocks obtained here is referred to as the "Os value". The percentage of styrene polymer blocks (Os value; mass %) = [(mass of styrene polymer blocks in the block copolymer before hydrogenation) / (mass of the block copolymer before hydrogenation)] × 100

[0125] <Hydrogenation rate (%)> Hydrogenation rates were measured by NMR. A nuclear magnetic resonance spectrometer (JEOL, instrument name "JNM-LA400") was used as the measuring instrument, deuterated chloroform was used as the solvent, and tetramethylsilane (TMS) was used as the chemical shift reference. Measurements were performed under the following conditions: sample concentration: 50 mg / mL, observation frequency: 400 MHz, pulse delay: 2.904 seconds, number of scans: 64, pulse width: 45°, and measurement temperature: 26°C.

[0126] <Weight average molecular weight> The weight-average molecular weight of component (D) was determined by gel permeation chromatography (GPC; Shimadzu Corporation, instrument name "LC-10") using tetrahydrofuran as the solvent (flow rate: 1.0 mL / min), oven temperature: 40°C, and TSKgelGMHXL column (4.6 mm ID × 30 cm, 2 columns). The weight-average molecular weight (Mw) was calculated as polystyrene-equivalent molecular weight by analyzing the obtained chromatogram using a calibration curve with standard polystyrene samples using a known method.

[0127] [Raw materials] <Propylene-based polymer (A)> As the propylene polymer (A-1), a propylene homopolymer (manufactured by Sun Allomer Co., Ltd., trade name "Sun Allomer PL400A", MFR: 2.0 g / 10 min measured under conditions of 230°C and a 2.16 kg load) was used.

[0128] <Ethylene-α-olefin copolymer (B)> As the ethylene-α-olefin copolymer (B-1), ethylene-1-octene copolymer (manufactured by Dow Chemical, trade name "Engage 8842") was used. The content of ethylene-derived constituent units in the copolymer was 55% by mass (83 mol%), and the content of octene-derived constituent units was 45% by mass (17 mol%). The MFR measured under conditions of 190°C and a 2.16 kg load was 1.0 g / 10 min.

[0129] <Softener (C)> As a softening agent (C-1), paraffin-based oil (manufactured by Idemitsu Kosan Co., Ltd., product name "Diana Process Oil PW-100") was used.

[0130] <Hydrogenated block copolymer (D)> The methods for producing hydrogenated block copolymers (D-1) to (D-3) are shown below. The hydrogenation catalyst used in the hydrogenation reaction of the block copolymer was prepared by the following method: 1 L of dried and purified cyclohexane was charged into a nitrogen-purged reaction vessel, 100 mmol of bis(cyclopentadienyl)titanium dichloride was added, and while stirring thoroughly, an n-hexane solution containing 200 mmol of trimethylaluminum was added and the reaction was carried out at room temperature for about 3 days. In this way, the hydrogenation catalyst was obtained.

[0131] <Manufacturing of hydrogenated material (D-1)> Batch polymerization was carried out using a 10 L tank reactor equipped with a stirrer and jacket. First, 6.4 L of cyclohexane and 75 g of styrene were added to the reactor, and N,N,N',N'-tetramethylethylenediamine (TMEDA) was added in a quantity equal to 0.25 times the number of Li moles of the n-butyllithium initiator. Then, n-butyllithium initiator was added in a quantity equal to 10 mmol of Li moles, and the first polymerization reaction was carried out at an initial temperature of 65°C. After the first polymerization reaction was completed, a cyclohexane solution (monomer concentration 22% by mass) containing 470 g of butadiene and 380 g of styrene was continuously supplied to the reactor at a constant rate over 60 minutes to carry out the second polymerization reaction. After the second polymerization reaction was completed, a cyclohexane solution (monomer concentration 22% by mass) containing 75 g of styrene was added over 10 minutes to carry out the third polymerization reaction. Subsequently, the third polymerization reaction was stopped by adding methanol. In this way, a block copolymer was obtained.

[0132] The content of styrene-derived structural units in the above block copolymer was 53% by mass, the content of styrene polymer blocks was 15% by mass, the content of styrene-derived structural units in copolymer blocks (i.e., copolymer blocks containing conjugated diene-derived structural units and vinyl aromatic compound-derived structural units) was 45% by mass, and the amount of vinyl bonding was 23 mol%.

[0133] The hydrogenation catalyst was added to the block copolymer at a concentration of 100 ppm (in titanium equivalent) per 100 parts by mass of the block copolymer, and a hydrogenation reaction was carried out under conditions of a hydrogen pressure of 0.7 MPa and a temperature of 75°C. To the polymer solution containing the hydrogenated block copolymer obtained from the hydrogenation reaction, 0.3 parts by mass of octadecyl-3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate was added as a heat stabilizer per 100 parts by mass of the hydrogenated block copolymer.

[0134] The weight-average molecular weight of the obtained hydrogenated block copolymer (D-1) was 160,000, and the hydrogenation rate of the double bonds of butadiene contained in the hydrogenated block copolymer (D-1) was 99 mol%.

[0135] <Manufacturing of hydrogenated material (D-2)> Batch polymerization was carried out using a 10 L tank reactor equipped with a stirrer and jacket. First, 6.4 L of cyclohexane and 325 g of styrene were added to the reactor, and TMEDA was added to a ratio of 0.40 times the number of Li moles of the n-butyllithium initiator. Then, the n-butyllithium initiator was added to a ratio of 20 mmol of Li moles, and the first polymerization reaction was carried out at an initial temperature of 65°C. After the first polymerization reaction was completed, a cyclohexane solution containing 350 g of butadiene (monomer concentration 22% by mass) was continuously supplied to the reactor at a constant rate for 60 minutes to carry out the second polymerization reaction. After the second polymerization reaction was completed, a cyclohexane solution containing 325 g of styrene (monomer concentration 22% by mass) was added over 10 minutes to carry out the third polymerization reaction. Subsequently, the third polymerization reaction was stopped by adding methanol. In this way, a block copolymer was obtained. The content of styrene polymer blocks in the block copolymer was 65% by mass, and the vinyl bond content was 40 mol%.

[0136] The hydrogenation catalyst was added to the block copolymer at a concentration of 100 ppm (in titanium equivalent) per 100 parts by mass of the block copolymer, and a hydrogenation reaction was carried out under conditions of a hydrogen pressure of 0.7 MPa and a temperature of 75°C. To the polymer solution containing the hydrogenated block copolymer obtained from the hydrogenation reaction, 0.3 parts by mass of octadecyl-3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate was added as a heat stabilizer per 100 parts by mass of the hydrogenated block copolymer. The weight-average molecular weight of the obtained hydrogenated block copolymer (D-2) was 50,000, and the hydrogenation rate of the double bonds of butadiene contained in the hydrogenated block copolymer (D-2) was 99 mol%.

[0137] <Manufacturing of hydrogenated material (D-3)> Batch polymerization was carried out using a 10 L tank reactor equipped with a stirrer and jacket. First, 6.4 L of cyclohexane and 175 g of styrene were added to the reactor, and TMEDA was added to a ratio of 0.30 times the number of Li moles of the n-butyllithium initiator. Then, the n-butyllithium initiator was added to a ratio of 11 mmol of Li moles, and the first polymerization reaction was carried out at an initial temperature of 65°C. After the first polymerization reaction was completed, a cyclohexane solution containing 650 g of butadiene (monomer concentration 22% by mass) was continuously supplied to the reactor at a constant rate for 60 minutes to carry out the second polymerization reaction. After the second polymerization reaction was completed, a cyclohexane solution containing 175 g of styrene (monomer concentration 22% by mass) was added over 10 minutes to carry out the third polymerization reaction. Subsequently, the third polymerization reaction was stopped by adding methanol. In this way, a block copolymer was obtained. The content of styrene polymer blocks in the block copolymer was 35% by mass, and the amount of vinyl bonds was 36 mol%.

[0138] The hydrogenation catalyst was added to the block copolymer at a concentration of 100 ppm (in titanium equivalent) per 100 parts by mass of the block copolymer, and a hydrogenation reaction was carried out under conditions of a hydrogen pressure of 0.7 MPa and a temperature of 75°C. To the polymer solution containing the hydrogenated block copolymer obtained from the hydrogenation reaction, 0.3 parts by mass of octadecyl-3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate was added as a heat stabilizer per 100 parts by mass of the hydrogenated block copolymer. The weight-average molecular weight of the obtained hydrogenated block copolymer (D-3) was 150,000, and the hydrogenation rate of the double bonds of butadiene contained in the hydrogenated block copolymer (D-3) was 99 mol%.

[0139] <Polyorganosiloxane Masterbatch> As the polyorganosiloxane masterbatch, a masterbatch (manufactured by DuPont-Toray Specialty Materials, trade name "MB50-001") consisting of 50% by mass of polydimethylsiloxane (E-1) and 50% by mass of propylene polymer (A-2) was used.

[0140] <Organic peroxide (F) and crosslinking agent (G)> The following mixture of organic peroxide (F-1) and crosslinking agent (G-1) was used. Organic peroxide (F-1): 2,5-dimethyl-2,5-bis(t-butylperoxy)hexane (manufactured by Nippon Oil & Fats Co., Ltd., trade name "Perhexa 25B") 100 parts by mass Crosslinking agent (G-1): Divinylbenzene (manufactured by Wako Pure Chemical Industries, Ltd.) 15 parts by mass

[0141] [Example 1] <Manufacturing of thermoplastic elastomer compositions> A twin-screw extruder (30mmφ, L / D=74; manufactured by Kobe Steel, "KTX-30") with an oil inlet in the center of the barrel was used as the extruder. A two-screw screw with mixing sections before and after the inlet was used as the screw. The raw materials were mixed together with 95 parts by mass of propylene polymer (A-1), 52 parts by mass of ethylene-α-olefin copolymer (B-1), 67 parts by mass of hydrogenated block copolymer (D-1), 14 parts by mass of hydrogenated material (D-2), 29 parts by mass of hydrogenated material (D-3), 10 parts by mass of polyorganosiloxane masterbatch (5 parts by mass of polydimethylsiloxane (E-1) and 5 parts by mass of propylene polymer (A-2)), and 5 parts by mass of a mixture of organic peroxide (F-1) and crosslinking aid (G-1). The mixture was then introduced into a twin-screw extruder (cylinder temperature 200°C) using a quantitative feeder. Subsequently, 138 parts by mass of softener (C-1) was injected by pump through an inlet in the center of the extruder, and melt extrusion was performed to obtain a thermoplastic elastomer composition.

[0142] The melt flow rate (MFR) of the above thermoplastic elastomer composition was measured under conditions of 230°C and a 1.2 kg load, in accordance with JIS K7210-1:2014 (Method A).

[0143] <Manufacturing of injection-molded products> Fabrics with striped, mesh, or leather-grain surface textures were prepared. Based on information obtained by 3D scanning the surface texture of these fabrics, flat plates with surface textures complementary to the striped, mesh, or leather-grain textures were manufactured by etching an S55C mold using a conventional method. The transfer rate of surface irregularities during mold manufacturing ((depth of irregularities in the mold / depth of irregularities in the fabric) × 100%) was set to 100% or 60%. A Meiki Seisakusho Co., Ltd. "M150CL-DM" injection molding machine was used. The molding conditions were a resin temperature of 220°C and a mold temperature of 40°C. Using a flat mold measuring 15 cm in length and 9 cm in width, with a surface shape complementary to the stripe pattern, the above thermoplastic elastomer composition was injection molded to produce molded samples with surface treatment.

[0144] [Examples 2-6, Comparative Examples 1-2] Molded body samples were prepared in the same manner as in Example 1, except that the flat mold used for injection molding was changed to a flat mold having the surface shape described in Table 1, and / or the composition of the thermoplastic elastomer composition was changed to the composition described in Table 1. In Comparative Example 1, a propylene polymer (A-1) was used instead of the thermoplastic elastomer composition.

[0145] [Testing methods for molded products] <Shore A hardness measurement> The above thermoplastic elastomer composition was press-formed in a hot press molding machine under the conditions of press temperature: 180°C, cooling temperature: 20°C, preheating time: 5 minutes, and pressurized melting time: 5 minutes to produce a 2 mm thick press sheet. A 6 mm thick laminated sheet obtained by stacking three of these press sheets was used as the measurement sample. The hardness of the measurement sample was measured at 23°C using a Shore A hardness tester in accordance with the method of JIS K6253-3:2023. The value read 10 seconds after the pressure plate was brought into contact with the measurement sample was defined as the Shore A hardness (10-second value).

[0146] <Method for measuring the average spacing and width of convex parts, Sa, Sz, and Ra> The surface of the molded body sample obtained in the examples or comparative examples, after surface treatment, was photographed using a one-shot 3D shape measuring machine (Keyence VR-5000) to obtain three-dimensional shape data (heightmap image). Then, the three-dimensional shape data was analyzed using roughness analysis software (VR-5000, analysis application) to obtain the average spacing and average width of the convex parts, Sa, Sz, and arithmetic mean roughness (Ra). The measurement area was 15 cm. 2 The measurement conditions for Sa and Sz were in accordance with ISO 25178-2:2012. The measurement conditions for Ra were in accordance with JIS B0601:2013, with a measurement length of 40 mm, a reference length of 8 mm, and a cutoff wavelength λc of 8 mm.

[0147] <Method for measuring static and dynamic friction coefficients> The static and dynamic friction coefficients of the surface-treated molded samples obtained in the examples or comparative examples were measured using a tactile evaluation machine (Trinity Lab Co., Ltd.'s static / dynamic friction measuring machine TL201Ts (product name)). The measurement conditions were set to a sliding speed of 100 mm / sec, a load of 50 gf, and a sliding distance of 50 mm.

[0148] <Method for evaluating stickiness and softness> The above molded sample was placed inside an evaluation booth covered with a blackout curtain, and the tactile sensation when the tester's index finger touched the surface of the molded sample while visual information was blocked was evaluated based on the following criteria: "○" if there was almost no stickiness, "△" if there was some stickiness, and "×" if there was a lot of stickiness. The molded sample was placed inside an evaluation booth covered with a blackout curtain, and the tactile sensation of the sample was evaluated based on the following criteria when the pad of the tester's index finger was slid across its surface while visual information was blocked. A "○" rating was given if the sample felt soft and not hard when the pad of the index finger was slid across it, a "△" rating was given if it felt slightly hard, and a "×" rating was given if it felt very hard. Three examiners conducted the same test, and their evaluations were consistent. The results are shown in Table 1.

[0149] [Table 1] [Explanation of Symbols]

[0150] S…Surface area 10...Convex first linear portion (convex portion) 12... Concave first linear portion (concave portion) 20…Second linear part (convex part) D1~D4...interval W1~W4...Width

Claims

1. A molded article formed from a thermoplastic elastomer composition, having a surface region with an arithmetic mean height (Sa) of 30 to 100 μm, as measured by a method in accordance with ISO 25178-2:2012.

2. The surface region has a plurality of convex or concave first linear portions extending in a first direction. The first linear portion is arranged substantially parallel to each other in a direction perpendicular to the first direction, The average distance between convex first linear portions or concave first linear portions in a direction perpendicular to the first direction is 1500 to 4000 μm. The molded article according to claim 1.

3. The surface region further has a plurality of convex or concave second linear portions extending in a second direction intersecting the first direction, wherein if the first linear portion is convex, the second linear portion is also convex, and if the first linear portion is concave, the second linear portion is also concave. The second linear portion is arranged substantially parallel to each other in a direction perpendicular to the second direction, The average distance between the second linear portions in the direction perpendicular to the second direction is 1500 to 4000 μm. The molded article according to claim 2.

4. The surface region has a plurality of convex portions and concave portions extending in the first direction, each serving as a first linear portion extending in the first direction. The aforementioned convex portions are arranged substantially parallel to each other in a direction perpendicular to the first direction, The aforementioned concave portions are arranged substantially parallel to each other in a direction perpendicular to the first direction, The convex portion and the concave portion are arranged alternately in a direction perpendicular to the first direction. The average distance between the convex portions in the direction perpendicular to the first direction is 1500 to 4000 μm. The average distance between the concave portions in the direction perpendicular to the first direction is 1500 to 4000 μm. The molded article according to claim 1.

5. The molded article according to claim 1, wherein the surface region has a fabric-like pattern.

6. The molded body according to claim 5, wherein the fabric-like pattern is at least one pattern selected from the group consisting of plain weave, twill weave, satin weave, and twisted weave.

7. The molded article according to claim 1, wherein the surface region has a Shore A hardness (10-second value) of 40 to 85, as measured by a method in accordance with JIS K6253-3:2023.

8. The thermoplastic elastomer composition A propylene polymer (A) and An ethylene-α-olefin copolymer (B) having ethylene-derived structural units and α-olefin-derived structural units having 3 to 20 carbon atoms, Softener (C), A hydrogenated block copolymer (D) having at least one block mainly containing structural units derived from a conjugated diene and at least one block mainly containing structural units derived from a vinyl aromatic compound, A molded article according to claim 1, comprising the above.

9. In the aforementioned thermoplastic elastomer composition, With respect to 100 parts by mass of the propylene polymer (A), The content of the ethylene-α-olefin copolymer (B) is 30 to 300 parts by mass. The content of the softening agent (C) is 45 to 300 parts by mass, The content of hydrogenated material (D) in the block copolymer is 50 to 400 parts by mass. The molded article according to claim 8.

10. The molded article according to claim 9, wherein the thermoplastic elastomer composition contains 2 parts by mass or more of polyorganosiloxane (E) per 100 parts by mass of the propylene polymer (A).

11. The molded article according to claim 8, wherein the thermoplastic elastomer composition has a ratio (C / B) of the content of the softener (C) to the content of the ethylene-α-olefin copolymer (B) that is greater than 0 and less than 3 by mass.

12. The hydrogenated product (D) of the block copolymer is The polymer is a copolymer block in which the block mainly contains the conjugated diene-derived structural units and further contains the conjugated diene-derived structural units and vinyl aromatic compound-derived structural units. The molded article according to claim 8, including the following:

13. The molded article according to claim 1, wherein the thermoplastic elastomer composition is a dynamically crosslinked body.

14. The molded article according to claim 8, wherein at least a portion of the ethylene-α-olefin copolymer (B) is crosslinked.

15. The molded article according to claim 1, which is an injection-molded article.

16. A molded body according to claim 1, which is an interior material for a mobile body.

17. An article comprising the molded body described in claim 1.

18. The article according to claim 17, further comprising polyurethane foam.

19. A mobile body comprising a molded body according to any one of claims 1 to 16 or an article according to claim 17 or 18 as an interior material.

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