WO2022270581A1 - Composition et corps moulé - Google Patents

Composition et corps moulé Download PDF

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Publication number
WO2022270581A1
WO2022270581A1 PCT/JP2022/025106 JP2022025106W WO2022270581A1 WO 2022270581 A1 WO2022270581 A1 WO 2022270581A1 JP 2022025106 W JP2022025106 W JP 2022025106W WO 2022270581 A1 WO2022270581 A1 WO 2022270581A1
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WO
WIPO (PCT)
Prior art keywords
mass
methyl
styrene
composition
pentene
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Application number
PCT/JP2022/025106
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English (en)
Japanese (ja)
Inventor
賢士 野間
智也 又吉
孝行 渡辺
遼太 堀谷
Original Assignee
三井化学株式会社
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Application filed by 三井化学株式会社 filed Critical 三井化学株式会社
Priority to JP2023530118A priority Critical patent/JPWO2022270581A1/ja
Publication of WO2022270581A1 publication Critical patent/WO2022270581A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/06—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer characterised by a fibrous or filamentary layer mechanically connected, e.g. by needling to another layer, e.g. of fibres, of paper
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
    • C08L23/20—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
    • C08L53/02—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes

Definitions

  • the present invention relates to compositions and molded articles. More particularly, the present invention relates to a composition, a molded article, a fabric laminate using the molded article, and a method for producing the same.
  • Patent Document 1 discloses a release film used in the production of a sealing body for a semiconductor module. In order to obtain excellent conformability to the mold, it is provided with a surface layer mainly composed of polymethylpentene resin such as 4-methyl-1-pentene, and an intermediate layer mainly composed of polymethylpentene resin and thermoplastic elastomer. A release film is disclosed.
  • Patent Document 2 by using a resin composition containing a base resin made of polyethylene resin or polypropylene resin and a low-molecular-weight 4-methyl-1-pentene polymer, excellent releasability and anti-rust properties are achieved. It is disclosed that high flexibility and transparency can be obtained while having blocking properties.
  • the present inventors maintain the characteristics of the conventional 4-methyl-1-pentene-based polymer, such as flexibility against stress, while further imparting new characteristics not disclosed in Patent Documents 1 and 2. Since then, we have conducted an in-depth study. As a result, by combining a 4-methyl-1-pentene polymer and a hydrogenated styrene-based elastomer, it is possible to obtain a high fit and a good feeling of use even at temperatures lower than room temperature. First time I've found what I can get.
  • the present invention has been made in view of the above circumstances, and provides a composition that has a good feeling of use at low temperatures while obtaining a good fit, and a molded article using the same.
  • composition shown below is provided.
  • the 4-methyl-1-pentene-based polymer (a) is a structural unit derived from 4-methyl-1-pentene and a structural unit derived from an ⁇ -olefin having 2 to 10 carbon atoms other than 4-methyl-1-pentene and
  • the styrene-based elastomer (b) is a hydrogenated block copolymer of a polystyrene block and a diene block, and the content of the polystyrene block relative to the total amount of the styrene-based elastomer (b) is greater than 0.0% by mass.
  • the 4-methyl-1-pentene polymer (a) is obtained by dynamic viscoelasticity measurement under the conditions of a heating rate of 4° C./min, a frequency of 1.59 Hz, and a strain of 0.1%. At least one temperature at which the loss tangent (tan ⁇ ) exhibits a maximum value is in the range of 10° C. or more and 100° C. or less, and the maximum value of the loss tangent is 0.5 or more and 3.5 or less [1]
  • the styrene elastomer (b) includes a hydrogenated styrene/butadiene rubber (HSBR), a hydrogenated styrene/butadiene block copolymer (SEBS), a hydrogenated styrene/isoprene block copolymer (SEPS), and water.
  • HSBR hydrogenated styrene/butadiene rubber
  • SEBS hydrogenated styrene/butadiene block copolymer
  • SEPS hydrogenated styrene/isoprene block copolymer
  • a saturated hydrocarbon compound (d) having a pour point of -10°C or less is added to 100 parts by weight of the total amount of the 4-methyl-1-pentene polymer (a) and the styrene elastomer (b). and 0.1 to 20 parts by weight of the composition according to any one of [1] to [5].
  • the content of the polystyrene block with respect to the total amount of the styrene-based elastomer (b) is more than 25% by mass and not more than 50% by mass;
  • a saturated hydrocarbon compound (d) having a pour point of -10°C or less is added to 100 parts by weight of the total amount of the 4-methyl-1-pentene polymer (a) and the styrene elastomer (b) to 0. .1 to 20 parts by weight of the composition according to any one of [1] to [5].
  • the composition has a loss tangent (tan ⁇ ) value at 30 ° C.
  • a foam sheet extruded at °C is prepared, and the sheets are overlapped so that the total thickness is 7 mm to obtain a test piece a.
  • the Shore A hardness (JIS K6253) of the test piece a is 10-70.
  • a foam sheet extruded at °C is prepared, and the sheet is punched into a width of 25 mm and a length of 100 mm to obtain a test piece c.
  • a tensile tester universal tensile tester 3380, manufactured by Instron
  • the test piece c was subjected to two temperature conditions of 23 ° C. and 40 ° C. with a distance between chucks of 30 mm and a tensile speed of 300 mm / min. Extend c by 50% in the TD direction, and measure the tensile load [N/25 mm] after 60 seconds.
  • a molded foam sheet is prepared, and the surface impact strength (in accordance with JIS K7211-2) of the sheet measured at a test temperature of 10° C. is 0.6 J or more.
  • a molded article obtained by molding the composition according to any one of [1] to [10].
  • the molded article according to [11], wherein the molded article contains cells and has a density of 0.10 to 1.0 g/cm 3 .
  • the molded article according to [11] or [12] is a sheet, A fabric laminate in which a fabric is attached to at least one surface of the sheet.
  • the term “substantially” means that it includes a range that takes into account manufacturing tolerances, assembly variations, and the like, unless otherwise explicitly stated.
  • the notation “a to b" in the description of numerical ranges means from a to b, unless otherwise specified.
  • “1 to 5% by mass” means “1% by mass or more and 5% by mass or less”.
  • the term "low temperature” means a temperature lower than room temperature of 20°C and at which the composition and molded article do not freeze.
  • the temperature may be 15° C. or lower, 10° C. or lower, or 5° C. or lower, or -10° C. or higher, -5° C. or higher, or 0° C. or higher.
  • the melt flow rate can be measured under the conditions of 230°C and a test load of 2.16 kg according to JIS K7210.
  • composition of the present embodiment comprises a 4-methyl-1-pentene polymer (a) and a styrene elastomer (b), and the 4-methyl-1-pentene polymer (a) contains a structural unit derived from 4-methyl-1-pentene and a structural unit derived from an ⁇ -olefin having 2 to 10 carbon atoms other than 4-methyl-1-pentene, and the styrene elastomer (b) is a polystyrene block and a diene block, wherein the content of the polystyrene block relative to the total amount of the styrene elastomer (b) is more than 0.0% by mass and 50% by mass or less, and the 4- The content of the styrene-based elastomer (b) with respect to 100 parts by mass of the methyl-1-pentene-based polymer (a) is 5 parts by mass or more and 500 parts by mass or less.
  • the composition of the present embodiment can improve tensile elongation at low temperatures while obtaining stress relaxation properties. As a result, it is possible to obtain a good feeling of use even at a temperature lower than room temperature while obtaining a high fitting property.
  • the composition of the present embodiment can appropriately fit human movements and shapes, and retains flexibility even when exposed to cold water and placed at low temperatures during washing. be done.
  • good flexibility, tensile properties, etc. are maintained even in cold regions, breakage is suppressed and it can be used satisfactorily.
  • heat resistance and low-temperature impact resistance can be further improved. Although the details of this reason are not clear, it is presumed as follows.
  • the styrene-based elastomer (b) of the present embodiment is a type of thermoplastic elastomer and includes a block copolymer composed of polystyrene as a hard part and polydiene as a soft part.
  • Tg glass transition point temperature
  • the polystyrene block forms physical crosslinks to develop rubber elasticity, while the glass transition point temperature (Tg ), it has the characteristic that it is plasticized and can be processed under the temperature above.
  • Tg glass transition point temperature
  • Tg glass transition point temperature
  • the present inventors have found that, among others, the hydrogenated product in which the soft portion is hydrogenated tends to increase the tensile strength and is more effective in solving the problem.
  • fit means, for example, that when applied to clothing, it can be moderately matched to human movements and body shapes.
  • Good feeling in use at low temperatures means that the fabric does not easily break or avoid cracking even at temperatures lower than room temperature, and maintains flexibility even when exposed to cold water during washing or the like and placed at low temperatures.
  • the composition of the present embodiment further has a loss tangent (tan ⁇ ) value at 30 ° C. obtained by dynamic viscoelasticity measurement under the conditions of a heating rate of 4 ° C./min, a frequency of 1.59 Hz, and a strain of 0.1%. is preferably 0.5 or more. As a result, more flexibility can be obtained at a temperature close to that of human skin, and the fit can be improved.
  • composition of the present embodiment preferably further satisfies condition i below.
  • condition i The extruder die temperature ( Film Forming Temperature) A foam sheet extruded at 190° C. is prepared, and the sheets are superimposed so that the total thickness is 7 mm to obtain a test piece a.
  • the Shore A hardness (JIS K6253) of the test piece a is 10-70.
  • the molded article using the composition of the present embodiment has appropriate flexibility and stress relaxation properties, can easily follow human movements and shapes, and has a high fit. Become.
  • the Shore A hardness (JIS K6253) of test piece a is preferably 20-70, more preferably 30-70, and even more preferably 40-70.
  • the thickness per expandable sheet under condition i is 0.3 to 0.6 mm, and the specific gravity is preferably 0.73 to 0.81. That is, by using a plurality of expandable sheets, it is possible to obtain a test piece a having a total thickness of 7 mm.
  • the thickness and specific gravity per foamable sheet can be appropriately set by adjusting the extrusion conditions (temperature, extrusion speed, etc.).
  • composition of the present embodiment preferably further satisfies the following condition (ii).
  • condition (ii) A sheet is prepared by extruding the above composition, and the sheets are superimposed so that the total thickness is 7 mm to obtain a test piece b.
  • the value ⁇ HS obtained by subtracting the value of Shore A hardness (JIS K6253) after 15 seconds from the value of Shore A hardness (JIS K6253) immediately after contact with the indentor of the Shore A hardness tester is 10 to 40. is.
  • condition ii it is possible to obtain good conformability to irregularities and improve fit.
  • the ⁇ HS of the test piece b under condition ii is preferably 15-30.
  • the thickness per sheet of condition ii is preferably 0.3 to 0.6 mm. That is, a test piece b having a total thickness of 7 mm can be obtained by using a plurality of sheets.
  • the thickness per sheet in condition ii can be appropriately set by adjusting extrusion conditions (temperature, extrusion speed, etc.).
  • composition of the present embodiment preferably further satisfies condition iii below.
  • condition iii Extrusion at a die temperature of 190° C. using the composition containing 1 part by mass of a chemical foaming agent per 100 parts by mass of the total amount of the 4-methyl-1-pentene polymer (a) and the styrene elastomer (b)
  • a molded foam sheet is prepared, and the sheet is punched into a width of 25 mm and a length of 100 mm to obtain a test piece c.
  • a tensile tester universal tensile tester 3380, manufactured by Instron
  • the test piece c was subjected to two temperature conditions of 23 ° C. and 40 ° C.
  • condition iii it is possible to obtain good conformability to irregularities in a molded article using the composition of the present embodiment.
  • good followability is obtained in a temperature range where human skin can warm the composition, making it easier for the composition to adhere to the human body.
  • the softening degree of the test piece c is preferably 30% to 70%. By setting the softening degree to the above upper limit or less, more flexibility can be obtained, skin familiarity is good, and fit can be improved.
  • each expandable sheet of condition iii is 0.3 to 0.6 mm, and the specific gravity is preferably 0.83 to 0.90.
  • the thickness and specific gravity per foamable sheet in condition iii can be appropriately set by adjusting the extrusion conditions (temperature, extrusion speed, etc.).
  • composition of the present embodiment preferably further satisfies condition iv below.
  • Condition iv Extrusion at a die temperature of 190° C. using the composition containing 1 part by mass of a chemical foaming agent per 100 parts by mass of the total amount of the 4-methyl-1-pentene polymer (a) and the styrene elastomer (b)
  • a molded foam sheet is prepared, and the surface impact strength (in accordance with JIS K7211-2) of the sheet measured at a test temperature of 10° C. is 0.6 J or more.
  • a molded article using the composition of the present embodiment can have high impact resistance even at low temperatures. As a result, it is possible to reduce breakage due to stress and deformation from the outside, and to improve usability at low temperatures. In addition, when the composition of the present embodiment is applied to clothing, good flexibility and durability can be obtained even when the clothing is washed under cold water or when used in cold climates.
  • the surface impact strength of the sheet is preferably 0.7 J or more.
  • the upper limit of the surface impact strength of the sheet is not particularly limited, but is preferably 10 J or less, more preferably 8 J or less, from the viewpoint of maintaining a balance with other performances.
  • composition of the present embodiment preferably further satisfies condition v below.
  • Condition v Extrusion at a die temperature of 190° C. using the composition containing 1 part by mass of a chemical foaming agent per 100 parts by mass of the total amount of the 4-methyl-1-pentene polymer (a) and the styrene elastomer (b)
  • a molded foam sheet is prepared, and the sheet is punched into a width of 25 mm and a length of 100 mm to obtain a test piece d.
  • a tensile tester universal tensile tester 3380, manufactured by Instron
  • the test piece d was subjected to two temperature conditions of 23 ° C. and 40 ° C.
  • the composition of the present embodiment has an initial load residual rate of 15 to 60% at 23 ° C. under condition v, so that even after deformation at room temperature, it returns to its original shape and exhibits a moderate tightening feeling.
  • an initial load residual rate of 50 to 80% it has a moderate initial load residual rate after being warmed by human skin, so even if tension is applied, it is difficult to create a feeling of tightening. It is preferable in terms of excellent fit.
  • These conditions i to v are indicators newly devised by the present inventor from the viewpoint of obtaining a composition that more stably provides a good feel in use at low temperatures while obtaining a better fit. That is, the effects of fit and feeling in use at low temperatures are new effects not found in conventional compositions, and indices based on existing measurement methods do not provide sufficient fit and feel in use at low temperatures. there was a case.
  • the composition of the present embodiment by satisfying the conditions iv, it is possible to obtain a better fit and a more stable feeling of use at low temperatures.
  • composition of the present embodiment that satisfies the properties and conditions described above can be realized, for example, by combining the materials of the composition by a known method. Specifically, focusing on the difference in melt flow rate (g/10 min) between the 4-methyl-1-pentene polymer (a) and the styrene elastomer (b), the styrene elastomer (b) and adjusting the ratio of the 4-methyl-1-pentene polymer (a) and the styrene elastomer (b).
  • melt flow rate g/10 min
  • the composition of this embodiment is not limited to such materials and production methods.
  • the 4-methyl-1-pentene-based polymer (a) is a polymer having structural units derived from 4-methyl-1-pentene.
  • the 4-methyl-1-pentene-based polymer (a) includes, for example, a structural unit (c1) derived from 4-methyl-1-pentene and carbon atoms other than 4-methyl-1-pentene and a 4-methyl-1-pentene/ ⁇ -olefin copolymer (c) containing a structural unit (c2) derived from an ⁇ -olefin of number 2 to 20.
  • ⁇ -olefin having 2 to 20 carbon atoms means not containing 4-methyl-1-pentene unless otherwise specified.
  • the 4-methyl-1-pentene/ ⁇ -olefin copolymer (c) according to the present embodiment has the structural unit (c1) and the structural unit (c2). ) is 100 mol%, the content of the structural unit (c1) is 10 mol% or more and 90 mol% or less, and the content of the structural unit (c2) is 10 mol% or more and 90 mol% or less.
  • the 4-methyl-1-pentene/ ⁇ -olefin copolymer (c) according to the present embodiment contains the structural unit (c1) and When the total with the structural unit (c2) is 100 mol%, the following order is more preferable.
  • the content of the structural unit (c1) is 30 mol% or more and 95 mol% or less, and the content of the structural unit (c2) is 5 mol% or more and 70 mol% or less;
  • the content of the structural unit (c1) is 30 mol% or more and 93 mol% or less, and the content of the structural unit (c2) is 7 mol% or more and 70 mol% or less;
  • the content of the structural unit (c1) is 30 mol% or more and 90 mol% or less, and the content of the structural unit (c2) is 10 mol% or more and 70 mol% or less;
  • the content of the structural unit (c1) is 50 mol% or more and 90 mol% or less, and the content of the structural unit (c2) is 10 mol% or more and 50 mol% or less;
  • the content of the structural unit (c1) is 60 mol% or more and 90 mol% or less, and the content of the structural unit (c2) is 10 mol% or more and 40 mol% or less;
  • the ⁇ -olefin having 2 to 20 carbon atoms used in the 4-methyl-1-pentene/ ⁇ -olefin copolymer (c) includes, for example, a linear or branched ⁇ -olefin , cyclic olefins, aromatic vinyl compounds, conjugated dienes, functionalized vinyl compounds, etc., and linear ⁇ -olefins are preferred.
  • the linear ⁇ -olefin preferably has 2 to 10 carbon atoms, more preferably 2 to 3 carbon atoms.
  • Linear ⁇ -olefins include, for example, ethylene, propylene, 1-butene, 1-pentene, etc., and ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 1-octene, and 1-
  • One or more selected from decene is preferred, and at least one selected from ethylene and propylene is more preferred.
  • the number of carbon atoms in the branched ⁇ -olefin is preferably 5-20, more preferably 5-15.
  • Branched ⁇ -olefins include, for example, 3-methyl-1-butene, 3-methyl-1-pentene, 3-ethyl-1-pentene and the like.
  • the number of carbon atoms in the cyclic olefin is preferably 5-15.
  • Cyclic olefins include, for example, cyclopentene, cyclohexene, cycloheptene, norbornene, 5-methyl-2-norbornene, tetracyclododecene, vinylcyclohexane, and the like.
  • aromatic vinyl compounds examples include styrene, ⁇ -methylstyrene, o-methylstyrene, m-methylstyrene, p-methylstyrene, o,p-dimethylstyrene, o-ethylstyrene, m-ethylstyrene, p- Examples include mono- or polyalkylstyrenes such as ethylstyrene.
  • the number of carbon atoms in the conjugated diene is preferably 4-20, more preferably 4-10.
  • Conjugated dienes include, for example, 1,3-butadiene, isoprene, chloroprene, 1,3-pentadiene, 2,3-dimethylbutadiene, 4-methyl-1,3-pentadiene, 1,3-hexadiene, and 1,3- - Octadiene and the like.
  • Examples of functionalized vinyl compounds include hydroxyl group-containing olefins, halogenated olefins, (meth)acrylic acid, propionic acid, 3-butenoic acid, 4-pentenoic acid, 5-hexenoic acid, 6-heptenoic acid, and 7-octene.
  • Acids unsaturated carboxylic acids such as 8-nonenoic acid, 9-decenoic acid and 10-undecenoic acid and their acid anhydrides and acid halides, unsaturated amines such as allylamine, 5-hexeneamine and 6-heptenamine, (2, 7-octadienyl)succinic anhydride, pentapropenyl succinic anhydride, unsaturated epoxy compounds, ethylenically unsaturated silane compounds, and the like.
  • unsaturated carboxylic acids such as 8-nonenoic acid, 9-decenoic acid and 10-undecenoic acid and their acid anhydrides and acid halides
  • unsaturated amines such as allylamine, 5-hexeneamine and 6-heptenamine, (2, 7-octadienyl)succinic anhydride, pentapropenyl succinic anhydride, unsaturated epoxy compounds, ethylenically unsatur
  • hydroxyl group-containing olefins examples include linear or branched ⁇ -olefins having 2 to 20 carbon atoms, preferably 2 to 15 carbon atoms, and hydroxyl-terminated ⁇ -olefins.
  • halogenated olefin examples include linear or branched halogenated ⁇ -olefins having 2 to 20 carbon atoms, preferably 2 to 15 carbon atoms.
  • ⁇ -olefins having 2 to 20 carbon atoms can be used alone or in combination of two or more.
  • ethylene and propylene are preferable, and propylene is particularly preferable because it can improve flexibility and the like.
  • the 4-methyl-1-pentene/ ⁇ -olefin copolymer (c) contains structural units other than the structural unit (c1) and the structural unit (c2) within a range that does not impair the object of the present invention. good too.
  • Other configurations include structural units derived from non-conjugated polyenes.
  • Non-conjugated polyenes include linear, branched or cyclic dienes having preferably 5 to 20 carbon atoms, more preferably 5 to 10 carbon atoms, various norbornenes, norbornadiene, and the like. Among these, 5-vinylidene-2-norbornene and 5-ethylidene-2-norbornene are preferred.
  • the 4-methyl-1-pentene polymer (a) is determined by dynamic viscoelasticity measurement under the conditions of a temperature increase rate of 4° C./min, a frequency of 1.59 Hz, and a strain amount of 0.1%.
  • At least one temperature showing the maximum value of loss tangent (tan ⁇ ) is in the range of 10 ° C. or more and 100 ° C. or less, and the maximum value of the loss tangent is 0.5 or more and 3.5 or less. preferable.
  • a 4-methyl-1-pentene polymer (a) is used to prepare a test piece of 30 mm long x 10 mm wide, and the frequency is 1.59 Hz and the temperature rise rate is 4 ° C./ Minutes, measurement temperature range of 0° C. to 110° C., amount of strain of 0.1%, distance between chucks of 20 mm, and torsion mode, using a rheometer.
  • the present inventors prepared a 4-methyl-1-pentene-based polymer (a) having a specific maximum value of loss tangent (tan ⁇ ) and a specific temperature range showing the maximum value, and a styrene-based elastomer (b ), the temperature at which the tangent loss is maximized can be shifted to the low temperature side, and the elongation at low temperatures can be improved more stably.
  • the 4-methyl-1-pentene-based polymer (a) by setting the maximum value of the loss tangent in the range of 10 ° C. or more and 100 ° C. or less, in this temperature range, the dynamics given when deforming Most of the energy can be converted into thermal energy, and much of the energy can be absorbed, so it is thought that the restoration speed after deformation becomes slow. As a result, it is considered that the 4-methyl-1-pentene polymer (a) can well follow deformation while maintaining the flexibility of the 4-methyl-1-pentene polymer (a).
  • the present inventors combined a 4-methyl-1-pentene-based polymer (a) having such a specific property with a new specific styrene-based elastomer (b) to obtain a 4-methyl-1-pentene-based polymer.
  • the temperature (Tg) at which the loss tangent (tan ⁇ ) of coalescence (a) exhibits a maximum value can be effectively shifted to the low temperature side, and the resulting composition can exhibit stress relaxation properties while maintaining tensile strength at low temperatures. It has been found that elongation can be improved, and low-temperature impact resistance and heat resistance can also be obtained.
  • the loss tangent of the 4-methyl-1-pentene-based polymer (a) according to the present embodiment is, for example, the type and blending ratio of the 4-methyl-1-pentene-based polymer (a), the presence or absence of crosslinking, the composition It is possible to control within the above range by appropriately adjusting the molding method of the object. Specifically, for example, by increasing the blending ratio of the 4-methyl-1-pentene polymer (a) in the composition, and by subjecting the 4-methyl-1-pentene polymer (a) to cross-linking treatment. and the like.
  • the 4-methyl-1-pentene polymer (a) is preferably uncrosslinked from the viewpoint of obtaining flexibility, conformability, and stress relaxation. That is, the 4-methyl-1-pentene polymer (a) according to the present embodiment is, for example, uncrosslinked without undergoing crosslinking treatment such as ionizing radiation crosslinking using electron beams or ⁇ rays. preferable. As a result, the maximum value of the loss tangent in the range of 10 ° C. or higher and 100 ° C. or lower can be improved, and the 4-methyl-1-pentene polymer (a) which is more excellent in the balance of stress relaxation and low-temperature tensile elongation is obtained. Obtainable.
  • the 4-methyl-1-pentene polymer (a) has at least one temperature in the range of at least 10° C. or higher and 40° C. or lower at which the dynamic viscoelasticity loss tangent (tan ⁇ ) exhibits the maximum value. and the maximum value of the loss tangent is preferably 0.8 or more and 3.0 or less. This makes it easier to improve low-temperature properties such as tensile elongation at low temperatures and low-temperature impact resistance.
  • the maximum value of the loss tangent of the 4-methyl-1-pentene polymer (a) is preferably 0.8 or more, more preferably 1.0 or more, and 1 .2 or more is more preferable.
  • the maximum value of the loss tangent is preferably 3.0 or less, more preferably 2.8 or less.
  • the melt flow rate of the 4-methyl-1-pentene polymer (a) according to the present embodiment is preferably 0.1 to 100 (g/10 minutes), more preferably 1 to 70 (g/10 minutes). , more preferably 2 to 20 (g/10 min), and even more preferably 3 to 15 (g/10 min).
  • the intrinsic viscosity [ ⁇ ] of the 4-methyl-1-pentene polymer (a) according to the present embodiment in decalin at 135° C. is, from the viewpoint of improving the flexibility and mechanical strength of the composition, It is preferably 0.01 to 5.0 dL/g, more preferably 0.1 to 4.0 dL/g, even more preferably 0.5 to 3.0 dL/g, and 1.0 ⁇ 2.8 dL/g is particularly preferred.
  • the density of the 4-methyl-1-pentene polymer (a) according to the present embodiment measured according to ASTM D 1505 (water substitution method) is preferably 0.810 to 0.850 g/cm 3 , more preferably 0.820 to 0.850 g/cm 3 , more preferably 0.830 to 0.850 g/cm 3 .
  • the 4-methyl-1-pentene polymer (a) according to this embodiment can be produced by various methods. For example, magnesium-supported titanium catalysts; metallocene catalysts described in WO 01/53369, WO 01/027124, JP-A-3-193796, and JP-A-02-41303; It can be produced using a known catalyst such as an olefin polymerization catalyst containing a metallocene compound described in 2011/055803.
  • the content of the 4-methyl-1-pentene polymer (a) in the composition according to the present embodiment is not particularly limited, but when the total composition is 100% by mass, preferably 20% by mass or more, More preferably 30% by mass or more, still more preferably 40% by mass or more, on the other hand, preferably 90% by mass or less, more preferably 80% by mass or less, and even more preferably 75% by mass or less.
  • the total composition is 100% by mass, preferably 20% by mass or more, More preferably 30% by mass or more, still more preferably 40% by mass or more, on the other hand, preferably 90% by mass or less, more preferably 80% by mass or less, and even more preferably 75% by mass or less.
  • the styrene-based elastomer (b) of the present embodiment is a hydrogenated block copolymer of a polystyrene block and a diene block.
  • a block copolymer can be hydrogenated by a known method in an inert solvent in the presence of a hydrogenation catalyst.
  • the hydrogenation of the block copolymer may be partially or wholly, but the hydrogenation reduces the unsaturated bonds and makes it easier to obtain flexibility, heat resistance, mechanical properties, etc. Therefore, the degree of hydrogenation is such that 50% or more of the olefinic double bonds in the copolymer block are hydrogenated, preferably 80% or more.
  • the content of the polystyrene block (styrene content) relative to the total amount of the styrene elastomer (b) is greater than 0.0% by mass and 50% by mass or less, preferably 5% by mass or more and 50% by mass or less, It is more preferably 30% by mass or less, and even more preferably 15% by mass or less.
  • the content of the polystyrene block with respect to the total amount of the styrene elastomer (b) is more than 25% by mass and 50% by mass or less.
  • the saturated hydrocarbon compound (d) is included, the content of the polystyrene block with respect to the total amount of the styrene elastomer (b) is 30% by mass or more and 40% by mass or less, and the saturated hydrocarbon compound (d) is more preferably contained in an amount of 1 to 15 parts by weight per 100 parts by weight of the total amount of the 4-methyl-1-pentene polymer (a) and the styrene elastomer (b).
  • the styrene elastomer (b) includes hydrogenated styrene/butadiene rubber, hydrogenated styrene/butadiene block copolymer (SEBS), hydrogenated styrene/isoprene block copolymer (SEPS) and hydrogenated styrene/isoprene/butadiene block copolymer.
  • SEBS hydrogenated styrene/butadiene block copolymer
  • SEPS hydrogenated styrene/isoprene block copolymer
  • SEEPS polymers
  • SEBS hydrogenated styrene-butadiene block copolymer
  • the Shore A hardness (JIS K6253) of the styrene elastomer (b) is preferably 10-100, more preferably 20-90, even more preferably 30-80.
  • the weight average molecular weight of the styrene-based elastomer (b) is preferably 10,000 to 450,000, more preferably 30,000 to 350,000, even more preferably 40,000 to 300,000.
  • the weight average molecular weight is the polystyrene equivalent weight average molecular weight measured by gel permeation chromatography.
  • the melt flow rate of the styrene-based elastomer (b) of the present embodiment is preferably 0.1 to 20 (g/10 min), more preferably 0.5 to 15 (g/10 min), still more preferably 1 to 10 (g/10 minutes).
  • Examples of the styrene-based elastomer (b) of the present embodiment include “Clayton (registered trademark) G” manufactured by Kraton Polymer Co., Ltd., “Hibler (registered trademark)” and “Septon (registered trademark)” manufactured by Kuraray Co., Ltd., and “Tuftec” manufactured by Asahi Kasei Corporation. (registered trademark)”, “SOE (registered trademark)”, and “DYNARON (registered trademark)” manufactured by JRS may be used.
  • the absolute value of the difference in melt flow rate (g/10 min) between the 4-methyl-1-pentene polymer (a) and the styrene elastomer (b) is 10 or less. One is preferred, nine is more preferred, and eight is even more preferred.
  • the content of the styrene elastomer (b) with respect to 100 parts by mass of the 4-methyl-1-pentene polymer (a) is 5 parts by mass or more and 500 parts by mass or less, preferably 10 to 400 parts by mass. , more preferably 20 to 300 parts by mass, still more preferably 40 to 200 parts by mass.
  • the content of the styrene-based elastomer (b) is set to the above lower limit or more, it is possible to improve the tensile elongation at low temperatures while maintaining the stress relaxation properties.
  • the content of the styrene-based elastomer (b) to the above upper limit or less, good stress relaxation properties and flexibility can be achieved while maintaining tensile elongation at low temperatures.
  • composition according to this embodiment may contain components other than the 4-methyl-1-pentene polymer (a) and the styrene elastomer (b).
  • the composition of the present embodiment may further contain a saturated hydrocarbon compound (d) having a pour point of -10°C or lower. This makes it easier to further improve the tensile elongation at low temperatures.
  • the pour point is preferably -11°C or lower, more preferably -12°C or lower. By setting the pour point to the upper limit or less, it becomes easier to obtain conformability and flexibility at low temperatures, and good tensile elongation can be obtained.
  • the pour point is measured according to JIS K2269.
  • the saturated hydrocarbon compound (d) preferably has 20 or more carbon atoms, and more preferably liquid paraffin or the like.
  • the content of the saturated hydrocarbon compound (d) is 0.1 to 20 parts by mass with respect to 100 parts by mass of the total amount of the 4-methyl-1-pentene polymer (a) and the styrene elastomer (b). Yes, preferably 1 to 15 parts by mass, more preferably 2 to 12 parts by mass.
  • the composition according to the present embodiment is a modified resin (a2) (however, the 4-methyl-1-pentene polymer (a) according to the present embodiment, and styrene-based elastomer (except for (b)) may be contained.
  • the modified resin (a2) according to the present embodiment includes, for example, one or more selected from thermoplastic resins, thermoplastic elastomers and rubbers.
  • thermoplastic resins examples include, for example, low-density polyethylene, medium-density polyethylene, high-density polyethylene, high-pressure low-density Polyethylene, polypropylene, poly-1-butene, poly-4-methyl-1-pentene, poly-3-methyl-1-butene, ethylene/ ⁇ -olefin copolymer, propylene/ ⁇ -olefin copolymer, 1-butene/ ⁇ - thermoplastic polyolefin resins such as olefin copolymers, cyclic olefin copolymers, chlorinated polyolefins; aliphatic polyamides (nylon 6, nylon 11, nylon 12, nylon 66, nylon 610, nylon 612), polyether block amide co Thermoplastic polyamide resins such as polymers; Thermoplastic polyester resins such as polyethylene terephthalate and polybutylene terephthal
  • thermoplastic elastomers include, for example, olefin-based elastomers, styrene-based elastomers (excluding the above styrene-based elastomer (b)), acid-modified styrene-based elastomers, vinyl chloride-based elastomers, urethane-based elastomers, ester-based elastomers, amide-based elastomers, Elastomers and the like can be mentioned.
  • these modified resins (a2) may be acid-modified with acrylic acid, methacrylic acid, maleic acid, or the like. These modified resins (a2) may be used singly or in combination of two or more.
  • low-density polyethylene low-density polyethylene, medium-density polyethylene, high-density polyethylene, high-pressure low-density polyethylene, polypropylene, poly-1-butene, poly-4-methyl-1-pentene, poly-3-methyl- One or two or more selected from 1-butene, ethylene/ ⁇ -olefin copolymer, propylene/ ⁇ -olefin copolymer, and 1-butene/ ⁇ -olefin copolymer are preferred, and polyethylene, polypropylene, and poly(1) -butene, poly 4-methyl-1-pentene, ethylene/ ⁇ -olefin copolymer, propylene/ ⁇ -olefin copolymer, 1-butene/ ⁇ -olefin copolymer, ethylene/vinyl acetate copolymer, poly One or two or more selected from ether block amides, ionomers, fluorine resins, acid-modified fluorine resins,
  • composition according to the present embodiment can be used singly or in combination of two or more of these modified resins (a2).
  • the content of the modified resin (a2) in the composition according to the present embodiment is not particularly limited. above, more preferably 2% by mass or more, still more preferably 3% by mass or more, preferably 50% by mass or less, more preferably 40% by mass or less, even more preferably 35% by mass or less, still more preferably 30% by mass % or less, particularly preferably 25 mass % or less.
  • the content of the modified resin (a2) is at least the above lower limit, the composition according to the present embodiment can have better appearance, touch, and the like.
  • the content of the modified resin (a2) is equal to or less than the above upper limit value, it is possible to improve the performance balance of the composition according to the present embodiment, such as flexibility.
  • the composition according to the present embodiment optionally contains a foaming agent, a heat stabilizer, an antioxidant, an ultraviolet absorber, a pigment, an antistatic agent, a copper damage inhibitor, a flame retardant, a neutralizer, a plasticizer, Additives such as nucleating agents, weather stabilizers, light stabilizers, antioxidants, fatty acid metal salts, softeners, dispersants, colorants, lubricants, natural oils, synthetic oils and waxes may be added. Among these, plasticizers, softeners, natural oils and synthetic oils are used to adjust the temperature at which the solid viscoelasticity loss tangent (tan ⁇ ) of the composition according to the present embodiment reaches its maximum value and the loss tangent maximum value. In addition, the type and amount added may be controlled.
  • foaming agent examples include chemical foaming agents and physical foaming agents.
  • Chemical foaming agents include sodium bicarbonate, ammonium bicarbonate, various carboxylates, sodium borohydride, azodicarbamide, N,N-dinitrosopentamethylenetetramine, P,P-oxybis(benzenesulfonylhydrazide). , azobisisobutyronitrile, p-toluenesulfonyl hydrazide, sodium bicarbonate sodium citrate, and the like.
  • Physical blowing agents include carbon dioxide, nitrogen, a mixture of carbon dioxide and nitrogen, and the like, all of which can be supplied in a gaseous, liquid, or supercritical state.
  • the composition of this embodiment may be in a foamed state containing air bubbles.
  • the density of the composition is preferably 0.10 to 1.0 g/cm 3 , more preferably 0.5 to 0.9 g/cm 3 , and more preferably 0.7 to 0.8 g/cm 3 . cm 3 is more preferred.
  • the shape of the composition according to this embodiment is not particularly limited, it may be in the form of a sheet. In the case of a sheet, the thickness is preferably 0.1 mm or more and 30 mm or less, more preferably 0.2 mm or more and 20 mm or less, and still more preferably 0.3 mm or more and 10 mm or less.
  • the thickness By setting the thickness to the above lower limit or more, a good balance of low-temperature tensile elongation, flexibility, mechanical properties, moldability, low-temperature impact resistance, and the like can be obtained. On the other hand, by setting the thickness to be equal to or less than the above upper limit value, lightness, appearance, and handleability can be improved.
  • the composition of the present embodiment may be a foam processed into a sheet.
  • composition of the present embodiment is prepared by dry blending the 4-methyl-1-pentene polymer (a), the organic compound (b), and other optional components as raw materials, using a tumbler mixer, a Banbury mixer, and a single screw extruder. , a twin-screw extruder, a high-speed twin-screw extruder, a hot roll, or the like.
  • the composition according to the present embodiment when the composition according to the present embodiment is in a foamed state, for example, the chemical foaming agent can be blended with the composition and uniformly mixed before being fed into the extruder.
  • carbon dioxide when carbon dioxide is used as a physical blowing agent, the composition is kneaded in an extruder, and after being plasticized, it can be obtained by injecting carbon dioxide directly into the extruder.
  • the expansion ratio is not particularly limited, and can be appropriately determined in consideration of the use of the composition.
  • the molded article of the present embodiment is obtained by molding the composition described above by a known method.
  • the shape of the molded body is not particularly limited, and it may be processed into any shape depending on the application.
  • the molded article of the present embodiment preferably satisfies the following condition a.
  • Condition A When the molded bodies are superimposed as necessary to prepare a test piece A so that the molded body has a thickness of 7 mm, the Shore A hardness (JIS K6253) of the test piece is 10 to 70.
  • the molded article of the present embodiment can have moderate flexibility and stress relaxation properties, can easily follow human movements and shapes, and can have a high fit.
  • the Shore A hardness (JIS K6253) of the test piece a is preferably 20-70, more preferably 30-70.
  • the molded article of the present embodiment preferably satisfies the following condition a.
  • Condition A A 25 mm wide ⁇ 100 mm long test piece is punched out of the compact. Using a tensile tester (universal tensile tester 3380, manufactured by Instron), the test piece (a) was subjected to two temperature conditions of 23 ° C. and 40 ° C. with a distance between chucks of 30 mm and a tensile speed of 300 mm / min. A is stretched by 50% in the TD direction, and the tensile load [N/25 mm] after 60 seconds is measured.
  • condition (a) it is possible to obtain good irregularity followability in the molded article of the present embodiment.
  • good followability is obtained in a temperature range where human skin can warm the body, making it easier for the molded body to adhere to the human body.
  • the softening degree of the test piece a is preferably 30% to 70% under condition b.
  • the softening degree is preferably 30% to 70% under condition b.
  • the molded article of the present embodiment preferably satisfies the following condition c.
  • Condition c The surface impact strength (in accordance with JIS K7211-2) of the molded product measured at a test temperature of 10° C. is 0.6 J or more.
  • the molded article of this embodiment can have high impact resistance even at low temperatures. As a result, it is possible to reduce breakage due to stress and deformation from the outside, and to improve usability at low temperatures. In addition, when the molded article of the present embodiment is applied to clothing, good flexibility and durability can be obtained even when the article is washed under cold water or used in cold climates.
  • the surface impact strength of the sheet is preferably 0.7 J or more.
  • the upper limit of the surface impact strength of the sheet is not particularly limited, but is preferably 10 J or less, more preferably 8 J or less, from the viewpoint of maintaining a balance with other performances.
  • the molded article of the present embodiment that satisfies the above conditions a to c can be realized by selecting the material of the composition constituting the molded article, controlling the manufacturing conditions of the molded article, and the like. For example, focusing on the difference in melt flow rate (g/10 min) between the 4-methyl-1-pentene polymer (a) and the styrene elastomer (b), the styrene elastomer (b) can be selected. , adjusting the ratio of the 4-methyl-1-pentene polymer (a) and the styrene elastomer (b).
  • the molded article of this embodiment is not limited to such materials and manufacturing methods.
  • the molded body of the present embodiment contain air bubbles.
  • the air bubbles are not limited to individual air bubbles, but may be a plurality of continuous air bubbles, or a mixture of air bubbles.
  • the density of the molded article of the present embodiment is preferably 0.10 g/cm 3 or more, more preferably 0.20 g/cm 3 or more, still more preferably 0.30 g/cm 3 or more, More preferably, it is 0.40 g/cm 3 or more.
  • the density of the molded article of the present embodiment is preferably 1.0 g/cm 3 or less, more preferably 0.90 g/cm 3 or less, still more preferably 0.85 g/cm 3 or less, More preferably, it is 0.80 g/cm 3 or less.
  • the molded article of the present embodiment is preferably a sheet, and the thickness of the sheet is preferably 0.1 mm or more and 10 mm or less, more preferably 0.2 mm or more and 8 mm or less, and still more preferably 0.3 mm or more and 5 mm. or less, and more preferably 0.4 mm or more and 3 mm or less.
  • the molded article of the present embodiment when the molded article of the present embodiment is a sheet, it may be a fabric laminate in which a fabric is bonded to at least one surface of the sheet. As a result, it is possible to realize a new fabric laminate that can obtain new functions such as stress relaxation and low-temperature tensile elongation properties of the molded article of the present embodiment, while taking advantage of the flexibility and texture of the fabric.
  • the fabrics are made by thinly processing fibers such as natural fibers, synthetic fibers, and chemical fibers, and include woven fabrics such as fabrics and non-woven fabrics.
  • woven fabrics such as fabrics and non-woven fabrics.
  • Specific examples include knitted fabrics having a weft knitting structure such as jersey, milled, smooth and double knit; knitted fabrics having a warp knitting structure such as tricot and raschel; and woven fabrics having a structure such as plain weave, twill weave and satin.
  • the thickness of the fabric is preferably 0.2 to 1.0 mm, more preferably 0.2 to 0.8 mm, even more preferably 0.2 to 0.6 mm.
  • the basis weight of the fabric is preferably 50 to 250 g/m 2 , more preferably 70 to 180 g/m 2 and even more preferably 100 to 150 g/m 2 .
  • Natural fibers such as cotton, linen, wool, and silk; regenerated fibers such as rayon and cupra; semi-synthetic fibers such as acetate and triacetate; synthetic fibers such as nylon, polyester, polyurethane, and acrylic; Mentioned are chemical fiber products consisting of mixed fibers of fibers.
  • At least a portion of the fabric laminate of this embodiment may be curved, and the radius of curvature may be in the range of 50 mm to 150 mm. This makes it easier for the fabric laminate of the present embodiment to follow the curved surface.
  • Curved surfaces include rounded portions of the human body, such as the head, chest, elbows, knees, and the like. Clothing worn on curved surfaces includes, for example, hats, hoods, brassieres, undergarments, and supporters.
  • the thickness of the fabric laminate of this embodiment is appropriately adjusted in consideration of flexibility, workability, ease of sewing, and the like.
  • the manufacturing method of the fabric laminate is not particularly limited, but when it is attached to the fabric, it is suitable to attach it at 140 to 190°C and 1.0 to 1.8 MPa.
  • the production efficiency is good when the bonding time is 30 seconds to 10 minutes. As a result, a fabric laminate can be obtained while maintaining the properties of the sheet composition of the present embodiment.
  • the molded article according to the present embodiment may have ventilation holes to improve breathability depending on the application.
  • ventilation holes to improve breathability depending on the application.
  • a large number of communicating vent holes can be provided on the front and back sides by processing techniques such as mechanical punching, needle processing, laser perforation, and water jetting.
  • composition and molded article according to the present embodiment are widely used in any field, for example, mobility goods such as automobile parts, railway parts, aircraft parts, ship parts, bicycle parts; electronic equipment; Audio equipment; camera equipment; precision equipment; game equipment; VR equipment; , Leisure goods such as backpacks; Agricultural goods such as gardening; eyeglasses, etc.), shoe supplies (various insoles, shoe lining materials, various equipment, shoes, shoelaces, etc.), decorative products such as accessories and small portable miscellaneous goods; medical supplies such as medical supplies and healthcare supplies; Educational/toy goods such as books and toys; Packaging-related goods such as packaging goods; Cosmetics-related goods such as face washing and makeup goods; It can be used for safety goods such as child seats; music goods; pet goods; fishing goods and the like.
  • clothing and clothing parts are preferable. That is, it is more preferably used for clothes in general, undergarments, undergarments, hats, shoes, and the like, which use fabrics.
  • the garment component is intended to be part of such a garment.
  • the core material of underwear, the insole of shoes, etc. are mentioned.
  • the molded article according to the present embodiment is suitable for use in a low-temperature environment. Examples include use in cold regions and use under cold water such as swimming pools and sea bathing. It is also suitable for use as a member that is attached to rounded parts of the human body. Examples thereof include members that constitute hats, hoods, brassieres, undergarments, supporters, and the like.
  • Melt flow rate (MFR) of 4-methyl-1-pentene polymer (a) It was measured under conditions of 230° C. and a test load of 2.16 kg according to JIS K7210.
  • Saturated hydrocarbon compound (d) ⁇ Saturated hydrocarbon compound (d-1): liquid paraffin “No.530-SP” (manufactured by Sanko Chemical Industry Co., Ltd.) (density: 0.86 g/cm 3 , viscosity: 87 (mPa s), pour point: ⁇ 15°C)
  • the resin temperature of the cylinder head part is 190 to 204 ° C.
  • the extrusion rate is 3.5 to 4.4 kg / hour T die (die temperature 190 °C) into sheets.
  • the extruded sheet is cooled with a cooling roll (water flow temperature inside the roll: 30° C.), taken up using a take-up machine (take-up speed: 0.8 to 0.9 m/min), and a sheet with a width of about 240 to 270 mm.
  • a composition processed into a shape was obtained.
  • a sheet was extruded through a T-die (die temperature: 190° C.) at an extrusion rate of 5 to 8.5 kg/hour.
  • the extruded sheet is cooled with a cooling roll (water flow temperature inside the roll: 30°C), taken up using a take-up machine (take-up speed: 0.4 to 2.3 m/min), and formed into a sheet with a width of about 300 mm.
  • a processed composition (unfoamed; molded body) was obtained respectively.
  • the fabric laminate of Example 13 has the same initial load residual rate at 23 ° C. as in Example 2 in which the fabric is not laminated, and the softening degree is It was in the range of 25-80%, and a good fit was also obtained.

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  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
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Abstract

Une composition selon la présente invention contient un polymère de 4-méthyl-1-pentène (a) et un élastomère de styrène (b) ; le polymère de 4-méthyl-1-pentène (a) comprend une unité constitutive dérivée du 4-méthyl-1-pentène et une unité constitutive dérivée d'une alpha-oléfine autre que 4-méthyl-1-pentène, l'alpha-oléfine ayant 2 à 10 atomes de carbone ; l'élastomère de styrène (b) est un produit hydrogéné d'un copolymère à blocs d'un bloc polystyrène et d'un bloc diène ; la teneur du bloc polystyrène par rapport à la masse totale de l'élastomère de styrène (b) est supérieure à 0,0 % en masse mais inférieure ou égale à 70 % en masse ; et la teneur en élastomère de styrène (b) par rapport à 100 parties en masse du polymère de 4-méthyl-1-pentène (a) est de 5 parties en masse à 500 parties en masse
PCT/JP2022/025106 2021-06-25 2022-06-23 Composition et corps moulé WO2022270581A1 (fr)

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JP2008234992A (ja) * 2007-03-20 2008-10-02 Swcc Showa Cable Systems Co Ltd 絶縁用樹脂組成物およびこれを用いた電線・ケーブル
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