WO2005047375A1 - 熱可塑性エラストマー組成物成形品およびその製造方法 - Google Patents
熱可塑性エラストマー組成物成形品およびその製造方法 Download PDFInfo
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- WO2005047375A1 WO2005047375A1 PCT/JP2004/016978 JP2004016978W WO2005047375A1 WO 2005047375 A1 WO2005047375 A1 WO 2005047375A1 JP 2004016978 W JP2004016978 W JP 2004016978W WO 2005047375 A1 WO2005047375 A1 WO 2005047375A1
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/12—Chemical modification
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- 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
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- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
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- 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
- C08J9/12—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 physical blowing agent
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- 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
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
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- 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
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
- C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
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- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/08—Copolymers of ethene
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2353/00—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08J2353/00—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
- C08J2353/02—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers of vinyl aromatic monomers and conjugated dienes
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- 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
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- 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
- C08L23/04—Homopolymers or copolymers of ethene
Definitions
- the present invention relates to a molded article of a thermoplastic elastomer composition obtained by irradiating a molded article containing a thermoplastic elastomer composition as a main component with electrons, and a method for producing the same.
- a dynamically crosslinked thermoplastic elastomer obtained from a copolymer of ethylene and ⁇ -olefin such as propylene and an olefin resin has flexibility, excellent rubber-like properties, and a vulcanization process.
- a molded product can be obtained by injection molding, profile extrusion molding, calendering, blow molding, or the like, which is a usual method for molding a thermoplastic resin. Therefore, in recent years, demand has been increasing as a substitute for vulcanized rubber and vinyl chloride resin in automotive parts, industrial products, electrical and electronic parts, building materials, etc. from the viewpoint of energy saving, resource saving and recycling.
- a foam that can also obtain such a dynamic cross-linking thermoplastic elastomer has a rough cellular structure because only the olefin resin portion is foamed. Furthermore, since gas escape occurs on the foam surface, the outer surface cannot be kept smooth and the appearance is poor.
- a crystalline polyethylene-based resin and a conjugated-gen-based block copolymer have a three-dimensional network structure.
- Elastomers have also been developed (Patent Document 2). This elastomer has significantly improved permanent set due to compression as compared to a normal non-crosslinked thermoplastic elastomer. However, even such an olefin-based non-crosslinked thermoplastic elastomer does not have a crosslinked structure, so that permanent set by compression was not sufficiently satisfactory.
- thermoplastic elastomer of the olefin type can be foamed uniformly, but the resulting foam does not have a crosslinked structure, and thus has a problem that large permanent distortion due to compression is large. .
- Patent Document 1 JP-A-6-73222
- Patent Document 2 JP 2001-341589 A
- the problem to be solved by the present invention is to obtain a molded article of a thermoplastic elastomer composition having improved compression set and oil resistance compared to a molded article of a thermoplastic elastomer composition. is there.
- the present invention provides a method for preparing a matrix comprising an ethylene ' ⁇ -olefin copolymer (1).
- the present invention relates to a molded article of a thermoplastic elastomer composition characterized by being obtained by: Second, the compatibility of (3) the conjugated gen-based block copolymer with (a) the crystalline ethylene-based polymer block and (b) the ethylene- ⁇ -olefin copolymer is compatible with the crystalline polyethylene-based block.
- the above conjugated gen-based block copolymer (3) is obtained by hydrogenating a conjugated gen-based block copolymer whose both end blocks are the following block and the intermediate block is the following B block.
- the A block and the B block is 100% by mass
- the A block is 5 to 90% by mass
- the B block is 10 to 95% by mass
- the conjugated system is 13.
- thermoplastic elastomer-one-composition molded article according to A a butadiene polymer block having a 1,2-Bull bond content of less than 25 mol% B; a conjugated diene polymer block having a 1,2-Bull bond content of 25 mol% or more, and Z or vinyl aromatic One Conjugated Gen Random Copolymer Block
- thermoplastic elastomer composition containing not more than 200 parts by weight of mineral oil based softener
- thermoplastic elastomer composition molded article obtained by adding 0.1 to 10 parts by mass of a crosslinking aid to the thermoplastic elastomer composition (4),
- thermoplastic elastomer composition having a cyclohexane-insoluble content of 50 to 100% by mass after electron beam irradiation
- thermoplastic elastomer composition having an electron beam irradiation amount of 100 to 2,000,000 (kV'kGy) as a product of an electron beam acceleration voltage (kV) and an irradiation dose (kGy).
- thermoplastic elastomer composition which is at least one selected from the group consisting of tubes, hoses, sheets, films, belts, and foams thereof, A thermoplastic elastomer composition molded article obtained by irradiating with an electron beam while
- Twelfth is a processed product obtained by processing the above-mentioned molded article of the thermoplastic elastomer composition
- thirteenth is an ethylene ⁇ -olefin copolymer (1), crystalline polyethylene resin (2) and The conjugated gen-based block copolymer (3) is mixed and subjected to dynamic heat treatment to obtain a thermoplastic elastomer composition.
- the thermoplastic elastomer composition is molded, and then irradiated with an electron beam.
- the present invention relates to a method for producing a molded article of a thermoplastic elastomer monofilament, wherein the molding is a foam molding in the above method.
- the present invention can provide a molded article of a thermoplastic elastomer composition having very small compression set and having oil resistance and scratch resistance.
- the thermoplastic elastomer composition constituting the molded article of the thermoplastic elastomer composition before irradiation with an electron beam is ethylene. It contains an ⁇ -olefin copolymer (1), a crystalline polyethylene resin (2), and a conjugated diene block copolymer (3) as the main components.
- the crystalline polyethylene resin (2) and the conjugated diene block copolymer (3) form a three-dimensional network structure in the matrix composed of the coalesced (1).
- the above-mentioned ethylene ' ⁇ -olefin refin-based copolymer (1) (hereinafter also simply referred to as “ ⁇ -based copolymer (1)”) comprises ethylene and ⁇ -olefin having 3 to 10 carbon atoms excluding ethylene. It is a copolymer that is the main component. The sum of ethylene and ⁇ - Orefin included in this ⁇ copolymer is 100 mol 0/0, it is preferred ethylene content is 50 to 90 mole 0/0. If the ethylene content is more than 90 mol%, the flexibility tends to be insufficient, while if it is less than 50 mol%, the mechanical strength tends to be insufficient, which is not preferable.
- ⁇ -olefins having 3 to 10 carbon atoms include propylene, 1-butene, 1-pentene, 4-methyl-pentene 1, 1-hexene, 1-heptene, 1-otene, 1-decene, and the like. Can be mentioned. Among them, propylene, 1-butene, 1-hexene, and 1-octene are more preferable, and propylene and 1-butene are more preferable. These compounds can be used alone or in combination of two or more. When an ⁇ -olefin having 10 or less carbon atoms is used, the copolymerizability of the ⁇ -olefin with other monomers is improved.
- the EAO-based copolymer (1) may contain a non-conjugated gen as required in an amount of 0 to 10 mol%.
- non-conjugated genes include linear non-cyclic gens such as 1,4-hexadiene, 1,6-hexadiene, 1,5-hexadiene, 5-methyl-1,4-hexadiene, 3, Non-branched chains such as 7-dimethyl-1,6-octadiene, 5,7-dimethylocta-1,6-diene, 3,7-dimethyl-1,7-octadiene, 7-methylotater 1,6-digen, dihydromyrcene, etc.
- Cyclic gen tetrahydroindene, methyltetrahydroindene, dicyclopentadiene, bicyclo [2.2.1] -hepta-2,5-gen, 5-methylene-2 norbornene, 5-ethylidene-2 norbornene, 5-probe Alicyclic gens such as Lou 2 norbornene, 5 isopropylidene 2-norbornene, 5-cyclohexylidene 2 norbornene, and 5 bur 2 norbornene can be mentioned.
- non-conjugated diene examples include 1,4-hexadiene, dicyclopentene, and 5-ethylidene-2 norbornene.
- EAO-based copolymers (1) have a viscosity of [ML (100 ° C)] (hereinafter Mooney
- Viscosity is the value measured at the rotor shape L type, preheating time 1 minute, rotor operation time 4 minutes, test temperature 100 ° C
- Viscosity is the value measured at the rotor shape L type, preheating time 1 minute, rotor operation time 4 minutes, test temperature 100 ° C
- the EAO-based copolymer (1) used in the present invention may be an oil-extended polymer to which a softener is added during polymerization.
- Such an EAO-based copolymer (1) can be produced by the method described in Japanese Patent Application No. 2000-383320.
- the crystalline polyethylene resin (2) contains ethylene as a main component and has an ethylene content of 90 to 100 mol%.
- the crystallinity of the crystalline polyethylene resin (2) is preferably 10% or more. If the crystallinity is less than 10%, the mechanical strength of the obtained weather strip tends to be poor.
- differential scanning calorimetry (DSC) The melting peak of the crystal is preferably 100 ° C. or higher. When the melting peak is lower than 100 ° C, the heat resistance and compression set of the obtained weather strip tend to be inferior.
- crystalline polyethylene resin (2) polyethylene, ethylene content of 90 mol% or more, propylene, butene 1, 4-methyl-pentene 1, hexene 1, otaten 1, etc. Having a carbon number of 3 to 6 (copolymers with X-olefin, etc., among which polyethylene is a resin obtained by either the high-pressure method or the low-pressure method). Two or more of these may be mixed.
- Examples of the conjugated gen-based block copolymer (3) include: (a) a crystalline ethylene-based copolymer and (b) a crystalline polyethylene-based copolymer having compatibility with an ethylene ' ⁇ -olefin-based copolymer. Those having a block higher than the compatibility with fat are preferred.
- the (a) crystalline ethylene-based polymer block included in the conjugated-gen-based block copolymer (3) copolymer includes a copolymer having an ethylene content of 50% or more and a homopolymer of ethylene. Can be.
- the conjugated gen-based block copolymer (3) preferably has a crystalline ethylene-based polymer block at both ends. By providing at both ends in this way, a particularly uniform three-dimensional network structure can be obtained.
- the three-dimensional network structure formed in the EAO-based copolymer usually consists mainly of a crystalline polyethylene-based resin (2) and a conjugated-gen-based block copolymer (3).
- the conjugated gen-based block copolymer (3) is obtained by hydrogenating a conjugated gen-based block copolymer having both end blocks of the following A block and an intermediate block of the following B block.
- the A block is 5-90% by mass and the B block is 10-95% by mass, where the total of the A block and the B block is 100% by mass. It is preferred that at least 80% of all double bonds contained in the conjugated block copolymer (3) before hydrogenation are saturated and the number average molecular weight is 50,000 to 700,000.
- the preferred conjugated gen-based block copolymer (3) is a copolymer having an A block at both ends and a B block between two A blocks (A—B—A type block copolymer). Is a block copolymer obtained by hydrogenating (polymer). That is, each block of the A block and the B block is a block before hydrogenation.
- the content of each block is 5 to 90% by mass (more preferably 10 to 80% by mass). %). If the content of the A block is less than 5% by mass (the content of the B block exceeds 95% by mass), it is difficult to exhibit sufficient crystallinity relative to the EAO-based copolymer (1) that becomes a matrix. It becomes difficult to form a structure. On the other hand, if it exceeds 90% by mass (B block is less than 10% by mass), the hardness is excessively increased, which is not preferable.
- the A block is a 1,3-butadiene polymer block containing butadiene as a main component (90% by mass or more, preferably 95% by mass or more of the entire A block). Also, 1 of A block, 2-vinyl group content lower than 25 mol% (more preferably 20 mol% or less, more preferably 15 mol 0/0 or less) is preferably. When one of the A block, 2 Bulle group content is 25 mol 0/0 above, drop authored instrument mechanical strength of the melting point of the crystal after hydrogenation tends to decrease.
- the number average molecular weight of the A block is preferably 25,000-630,000 (more preferably, ⁇ 100,000-480,000).
- the A block is hydrogenated and shows a structure similar to low density polyethylene.
- the B block is a conjugated diene polymer block containing a conjugated conjugate as a main component (50% by mass or more, preferably 60% by mass or more of the entire B block).
- the conjugated diene compounds include 1,3-butadiene, isoprene, 2,3-dimethyl-1,3-butadiene, 1,3-pentadiene, 2-methinolay 1,3-pentadiene, 1,3-hexadiene, 5-Jetinolay 1,3-octadiene; 3-butyl-1,3-octadiene; Among them, it is preferable to use 1,3-butadiene, isoprene and 1,3-pentadiene, and it is particularly preferable to use 1,3-butadiene.
- the B block is composed of two or more of these.
- 1 of the B block 2 Bulle group content, 25 mol 0/0 or more (more preferably 25 95 molar%, more preferably 30- 90 mol%) is preferably from. Less than 25 mol% 25 It becomes a greasy property and the flexibility tends to decrease. Furthermore, the 1,2-vinyl group content contained in the B block exceeds the 1,2-vinyl group content of the A block. If the 1,2-vinyl group content is lower than the A block, the flexibility of the thermoplastic elastomer composition used in the present invention is apt to decrease.
- the number average molecular weight of the B block is 5,000-665,000 (more It is preferably 20,000-5 40,000).
- the content of the vinyl aromatic polymer block is 35% by mass or less when the entire block is 100% by mass (more L is preferably 30% by mass or less, and more preferably 25% by mass or less.
- This block is a rubber-like ethylene / butene 1 copolymer block or a polymer block having a structure similar to that of a butyl aromatic compound / ethylene 'butene 1 copolymer by hydrogenation.
- the butyl aromatic compound includes styrene, tert-butyl styrene, ⁇ -methyl styrene, ⁇ -methyl styrene, ⁇ -ethyl styrene, divinyl benzene, 1,1-diphenyl styrene, vinyl naphthalene, bul anthracene, ⁇ , ⁇ —Getyl- ⁇ -aminoethylstyrene, butylpyridine and the like. Of these, styrene is preferred.
- the double bond contained in the conjugated gen-based block copolymer (3) obtained after hydrogenation is at least 80% (more preferably 90%, more preferably 90%) of all double bonds before hydrogenation. (95-100% is preferably saturated). If it is less than 80%, thermal stability and durability are likely to decrease.
- the number average molecular weight of the conjugated block copolymer (3) is preferably 50,000-700,000 (more preferably 100,000-600,000)! /. If it is less than 50,000, the heat resistance, strength, fluidity and curability tend to decrease, while if it exceeds 700,000, the fluidity, processability and flexibility tend to decrease.
- Conjugated gen-based block copolymers (3) include, for example, aliphatic hydrocarbon solvents such as pentane, hexane, heptane, and otatan, cyclopentane, methylcyclopentane, cyclohexane, methylcyclohexane and the like.
- a vinyl aromatic compound and a conjugated gen compound or a vinyl aromatic compound and a conjugated gen compound in an inert organic solvent such as an alicyclic hydrocarbon solvent or an aromatic hydrocarbon solvent such as benzene, xylene, toluene, and ethylbenzene.
- this block copolymer can be obtained by lipo-ion polymerization using an organic alkali metal compound as a polymerization initiator, and this block copolymer (hereinafter, also referred to as ⁇ polymer before hydrogenation ''). ), The hydrogenated gen-based copolymer of the present invention can be easily obtained.
- Examples of the organic alkali metal compound as a polymerization initiator include an organic lithium compound and an organic sodium compound, and particularly, an organic lithium compound such as n-butyllithium, sec-butyllithium, and tert-butyllithium is preferable. ,.
- the amount of the organic alkali metal compound used is not particularly limited, and it can be used in various amounts as required. Usually, the amount is 0.02 to 15% by mass, preferably 0.03 to 100% by mass of the monomer. Used in an amount of 5% by weight.
- the polymerization temperature is generally -10 to 150 ° C, preferably 0 to 120 ° C. Further, it is desirable to replace the atmosphere of the polymerization system with an inert gas such as nitrogen gas.
- the polymerization pressure is not particularly limited as long as the polymerization is carried out within a pressure range sufficient to maintain the monomer and the solvent in a liquid phase in the above-mentioned polymerization range.
- the method of introducing the monomer of the compound into the polymerization system is not particularly limited, and the method may be used in a lump. , Continuous, intermittent, or a combination thereof. Further, when the copolymerized block containing the butyl aromatic compound and the conjugated conjugate is polymerized, the amount of other copolymerized components, the amount of the polar substance added, the number and type of the polymerization vessel, etc.
- the method of introducing the above monomer may be selected so that the properties of the obtained hydrogenated gen-based copolymer, its composition, and the molded product of the composition are favorable.
- the pre-hydrogenated polymer of the present invention is obtained by obtaining a block copolymer by the above method, and then using a coupling agent to form a copolymer in which the copolymer molecular chain is via a coupling residue. There may be.
- Examples of the coupling agent to be used include dibutylbenzene, 1,2,4-tributylbenzene, epoxy 1,2-polybutadiene, epoxy soybean oil, epoxy hyama oil, benzene 1,2,4 triisocyanate.
- the hydrogenated copolymer of the present invention is obtained by partially or selectively hydrogenating the block copolymer obtained as described above.
- the hydrogenation method and reaction conditions are not particularly limited. Usually, the hydrogenation is carried out at 20-150 ° C. under a pressure of 0.1 lOMPa of hydrogen in the presence of a hydrogenation catalyst.
- the hydrogenation ratio can be arbitrarily selected by changing the amount of the hydrogenation catalyst, the hydrogen pressure during the hydrogenation reaction, or the reaction time.
- the hydrogenation catalyst usually, a compound containing any of the metals of the periodic table lb, IVb, Vb, VIb, VIIb, VIII group, for example, Ti, V, Co, Ni, Zr, Ru, Rh, Pd, Hf, Compounds containing Re and Pt atoms can be used.
- a metallocene compound such as Ti, Zr, Hf, Co, Ni, Pd, Pt, Ru, Rh, Re, a metal such as Pd, Ni, Pt, Rh, Ru, etc.
- organic metal compounds or complexes such as Ru, Rh and the like, and fullerenes and carbon nanotubes in which hydrogen is absorbed.
- a metallocene compound containing any of Ti, Zr, Hf, Co, and Ni is preferable in that a hydrogenation reaction can be performed in a homogeneous system in an inert organic solvent.
- a meta-mouthed conjugate containing any of Ti, Zr and Hf is preferred.
- a hydrogenation catalyst obtained by reacting a titanocene conjugate with an alkyl lithium is preferable because it is an inexpensive and industrially useful catalyst.
- the hydrogenation catalyst may be used alone or in combination of two or more. After hydrogenation, if necessary, the catalyst residue is removed, or a phenol-based or amine-based antioxidant is added, and then the hydrogenated-gen-based copolymer of the present invention is added from the hydrogenated-gen-based copolymer solution. Isolate the coalescence.
- Isolation of the hydrogenated gen-based copolymer can be performed, for example, by adding acetone or alcohol to the hydrogenated gen-based copolymer solution to cause precipitation, or by stirring the hydrogenated gen-based copolymer solution in boiling water. For charging and distilling off the solvent It can be performed by a method or the like.
- the conjugated gen-based block copolymer before hydrogenation of the conjugated gen-based block copolymer (3) is composed of a plurality of ABA type block copolymers via a coupling agent residue. And may be contained by being linked. That is, it may be [A-B-A-X] n- (A-B-A), where n is an integer of 2-4 and X represents a coupling agent residue. Furthermore, in the block copolymer before hydrogenation, the coupling agent residue does not affect the crystallinity of the conjugated diene block copolymer (3) whose molecular weight is sufficiently smaller than the A block and the B block.
- the conjugated gen-based block copolymer (3) may be a modified block polymer modified with a functional group.
- a functional group use at least one selected from the group consisting of a carboxyl group, an acid anhydride group, a hydroxyl group, an epoxy group, a halogen atom, an amino group, an isocyanate group, a sulfol group and a sulfonate group. Can be.
- a known method can be used as the modification method.
- the content of the functional group of the modified block polymer is, when the whole structural units constituting the block polymer is 100 mole 0/0, 0. 01- 10 mole 0/0 (more preferably 0.1 - 8 mol%, further preferably is 0.5 15- 5 mole 0/0).
- Preferred monomers that can be used to introduce the functional group include acrylic acid, methacrylic acid, itaconic acid, maleic acid, maleic anhydride, glycidyl acrylate, daricidyl methacrylate, aryl glycidyl ether, and hydroxyethyl meta.
- Tarylate, hydroxypropyl metharylate, hydroxyethyl acrylate, hydroxypropyl acrylate, dimethylaminoethyl methacrylate and the like can be mentioned.
- the thermoplastic elastomer composition comprises the above-mentioned ethylene ' ⁇ -olefin copolymer (1), crystalline polyethylene-based resin (2), and conjugated gen-based block copolymer (3) In a matrix comprising the ethylene- ⁇ -olefin-based copolymer (1), the crystalline polyethylene-based resin (2) and the conjugated-gen-based block copolymer (3) Form a three-dimensional network structure!
- the conjugated gen-based block copolymer (3) can connect the EAO-based copolymer (1) and the crystalline polyolefin-based resin (2), the conjugated-gen-based block copolymer (2) It is considered that the gen-based block copolymer (3) can form a three-dimensional network structure in the EAO-based copolymer (1).
- thermoplastic elastomer composition used for producing the molded article of the present invention an EAO-based copolymer (1), a crystalline polyethylene-based resin (2), and a conjugated gen-based block copolymer (3) were used.
- the content of the EAO-based copolymer (1) is 10 to 94% by mass (preferably 20 to 94% by mass, more preferably 25 to 50% by mass, when the total of these three components is 100% by mass).
- the crystalline polyethylene resin (2) is 5-80% by mass (preferably 5-50% by mass, More preferably 5 to 30% by mass), and the conjugated gen-based block copolymer (3) accounts for 118 to 80% by mass (more preferably 2 to 50% by mass, particularly preferably 3 to 30% by mass). Preferably, there is.
- thermoplastic elastomer composition having a sufficient elastic recovery force, while when it exceeds 94% by mass. It is difficult to obtain a thermoplastic elastomer composition having sufficient moldability.
- thermoplastic elastomer composition having a sufficient elastic recovery force, while it exceeds 80% by mass. It is difficult to obtain a thermoplastic elastomer composition having sufficient elasticity.
- the content of the conjugated gen-based block copolymer (3) is less than 1% by mass, it is difficult to obtain a thermoplastic elastomer composition having sufficient elastic recovery force, while if it exceeds 80% by mass, It is difficult to obtain a thermoplastic elastomer composition having sufficient moldability.
- the EAO-based copolymer (1) is 40-94% by mass (more preferably 50-94% by mass)
- the total of the resin (2) and the conjugated gen block copolymer (3) is 6 to 60% by mass (more preferably 6 to 50% by mass)
- the crystalline polyethylene resin (2) and the conjugated gen When the total of the system block copolymer (3) is 100% by mass and the crystalline polyethylene resin (2) is 20-80% by mass (more preferably 30-70% by mass), Stable 3D mesh Structure can be obtained.
- thermoplastic elastomer composition used for producing the molded article of the present invention may be used in combination with a crystalline and Z- or amorphous ⁇ -olefin refin-based polymer. Thereby, the surface of the obtained molded article can be made smoother.
- ⁇ -olefin olefin copolymer those having an ⁇ -olefin olefin having 3 or more carbon atoms as a main component are preferable.
- the mixing ratio of this a-year-old olefin copolymer is as follows: EAO copolymer (1), crystalline polyethylene-based resin (2), conjugated gen-based block copolymer (3) and a-olefin
- EAO copolymer (1) crystalline polyethylene-based resin (2)
- conjugated gen-based block copolymer (3) conjugated gen-based block copolymer (3)
- a-olefin When the total amount of the copolymer is 100% by mass, it is preferably 10% by mass or less, more preferably less than 5% by mass (particularly preferably 4% by mass or less).
- thermoplastic elastomer used in the present invention may contain a softener.
- mineral oil-based hydrocarbons are preferred among the powers of which include non-finish, naphthenic and aromatic mineral oil-based hydrocarbons, and low molecular weight hydrocarbons such as polybutene and polybutadiene. It is preferable that the rubber has a weight average molecular weight of 300 to 2,000, particularly 500 to 1,500.
- a rubber softener composed of a mineral oil-based hydrocarbon is generally a mixture of an aromatic ring, a naphthene ring, and a paraffin chain, and the number of carbon atoms in the paraffin chain is 50% or more of the total number of carbon atoms.
- Oils occupy paraffinic oils, naphthenic oils with 30-45% of the total carbon atoms in the naphthenic ring are naphthenic oils, and those with 30% or more carbon atoms in the aromatic ring are aromatic. Although they are classified as oils, paraffinic oils are preferred and hydrogenated paraffinic oils are particularly preferred in the present invention.
- Mineral oil-based hydrocarbons have a kinematic viscosity at 40 ° C of 20 to 800 cSt, especially 50 to 600 cSt, and a pour point of 40 to 0 ° C, especially -30 to 0 ° C. Is preferred.
- the content is based on EAO-based copolymer (1), crystalline polyethylene-based resin (2) and conjugated diene.
- the amount is preferably 200 parts by mass or less (more preferably 100 parts by mass or less, further preferably 50 parts by mass or less). Workability and flexibility can be improved by including a softening agent.
- the addition method and the addition step are not limited.
- thermoplastic elastomer composition is EAO-based copolymer (1), crystalline polyethylene-based resin (2), conjugated-gen-based block copolymer (3), and if necessary It is not particularly limited as long as it can be dispersed well with other components, and can be obtained by dynamic heat treatment.
- the term "dynamically heat-treating” refers to performing both shearing force and heating.
- This dynamic heat treatment can be performed using, for example, a melt kneading apparatus.
- the device capable of performing kneading include devices such as an open-type mixing roll, a non-open-type Banbury mixer, a single-screw extruder, a twin-screw extruder, and a kneader. .
- the processing performed by this kneading apparatus may be a batch type or a continuous type.
- the continuous extruder is not particularly limited as long as the thermoplastic elastomer composition can be melt-kneaded, and examples thereof include a single-screw extruder, a twin-screw extruder, and a twin-screw rotor-type extruder. Among them, a twin-screw extruder is preferably used.
- twin-screw extruder having an L / D (ratio of the effective screw length L to the outer diameter D) of 30 or more, more preferably 36 to 60, is preferably used.
- twin-screw extruder any twin-screw extruder can be used, for example, one in which two screws are engaged and one in which they are not engaged, but the rotation direction of the two screws is the same. It is more preferable that the screws engage with each other.
- twin-screw extruders include GT'PCM manufactured by Ikegai, KTX'LCM'NCM manufactured by Kobe Steel, TEX'CI M'CMP manufactured by Nippon Steel, TEM manufactured by Toshiba Machine, and TEM manufactured by Warner. ZSK (both are trademarks).
- the processing temperature in the dynamic heat treatment is 120-350 ° C, preferably 150-290 ° C. Yes, the processing time is 20 seconds to 320 minutes, preferably 30 seconds to 25 minutes. Further, the shearing force for calorie-free from the mixture is 10-20, OOO / sec, preferably 100-10,000 / sec, in shear rate.
- thermoplastic elastomer composition contains the thermoplastic resin and rubber in the following amounts in an amount that does not impair the mechanical strength, flexibility and moldability of the finally obtained molded article of the present invention. Force It can contain selected polymer compounds and various additives.
- the powerful polymer compound is not particularly limited as long as it is other than a specific functional group-containing copolymer, and various compounds can be used. Specific examples thereof include ionomers, aminoacrylamide polymers, and polyethylene. And its maleic anhydride graft polymer, polyisobutylene, ethylene monochloride polymer, ethylene butyl alcohol polymer, ethylene vinyl acetate copolymer, polyethylene oxide, ethylene acrylic acid copolymer, polypropylene and its maleic anhydride graft polymer Merged, atactic poly-1 butene homopolymer, a one-year-old olefin copolymer resin (containing more than 50 mol% propylene) and other ⁇ -year-old olefins (ethylene, 1-butene, 1-pentene, 1- Xen, 4-methyl-1-pentene, 1-otaten, 1-decene, etc.) Copolymers, 1-butene (50 mol 0/0 or containing with) other
- Isoprene rubber and its hydrogenated product anhydrous maleic acid grafted polymer of hydrogenated product of styrene and isoprene rubber, nitrile rubber And its hydrogenated products, acrylic rubber, silicone rubber, fluoro rubber, butyl rubber, natural rubber, chlorinated polyethylene thermoplastic elastomer, syndiotactic 1,2-polybutadiene, styrene Hydrogenated isoprene conjugated block copolymer, simple blend type olefin-based thermoplastic elastomer, implant type olefin-based thermoplastic elastomer, dynamically crosslinked olefin-based thermoplastic elastomer, polyvinyl chloride-based heat Plastic elastomer, polyurethane thermoplastic elastomer And polyester-based thermoplastic elastomers, polyamide-based thermoplastic elastomers, and fluorine-based thermoplastic elastomers.
- These polymer compounds can be used alone or in combination of two or more.
- the proportion of the polymer compound used is 300 parts by mass or less, preferably 1 to 200 parts by mass, per 100 parts by mass of the specific functional group-containing copolymer.
- additives include, for example, antioxidants, antistatic agents, blocking agents, sealability improvers, lubricants, antiaging agents, heat stabilizers, weathering agents, metal deactivators, ultraviolet absorbers, light absorbers, and the like.
- Stabilizers, stabilizers such as copper damage inhibitors, antibacterial and antifungal agents, dispersants, plasticizers, crystal nucleating agents, flame retardants, tackifiers, foaming aids, coloring agents such as titanium oxide and carbon black Pigments, metal powders such as ferrite, glass fibers, inorganic fibers such as metal fibers, organic fibers such as carbon fibers and aramide fibers, composite fibers, inorganic whiskers such as potassium titanate whiskers, glass beads, glass balloons, Glass flakes, asbestos, my strength, calcium carbonate, talc, wet silica, dry silica, alumina, alumina silica, calcium silicate, hydrated talcite, kaolin, diatoms , Graphite, pumice,
- thermoplastic elastomer composition of the present invention first, a molded article before irradiation is prepared using the composition obtained as described above.
- the molding method is not particularly limited, and for example, an extrusion molding method, a calendar molding method, a solvent casting method, an injection molding method, a vacuum molding method, a powder slush molding method, and a hot press method can be suitably used.
- thermoplastic elastomer composition the above-mentioned components (1), (2), (3) and the other components used as necessary constituting the thermoplastic elastomer composition are mixed under appropriate conditions. It can also be produced by performing the step of preparing the water-soluble elastomer composition and the step of molding in a single step.
- the form of the molded article may be any form such as a tube, a hose, a sheet, a film, a belt, and a three-dimensional form, and may be a solid body or a foam. Further, a form in which these are combined may be used. Further, it may be formed continuously or with a notch.
- a foam it is not particularly limited, but it can be carried out as follows.
- thermoplastic elastomer compositions Foaming of thermoplastic elastomer compositions
- the foam as a material of the molded article of the present invention is obtained by blending a foaming agent with the thermoplastic elastomer composition so that the foaming multiplication power is usually 1.2 to 20, preferably 1.4 to 10. It can be obtained by foaming. At this time, a molded article made of a foam can be obtained simultaneously with the foaming and molding.
- foaming agent examples include a pyrolytic foaming agent, a volatile foaming agent, a hollow particle foaming agent, and a supercritical fluid.
- This blowing agent can be selected according to the production method. These foaming agents may be used alone or as a mixture of two or more.
- Examples of the pyrolytic foaming agents include -troso foaming agents such as N, N-dinitrosopentamethylenetetramine, N, N-dimethyl-N, N, dinitrosoterephthalamide; azodicarbonamide, Azo-based blowing agents such as barium azodicarboxylate and norrium azodicarboxylate; p, p-oxybisbenzenesulfol-hydrazide, 4,4'-oxybis (benzenesulfol-l-hydrazide), p-toluenesulfoyuryl semicarbazide, etc.
- -troso foaming agents such as N, N-dinitrosopentamethylenetetramine, N, N-dimethyl-N, N, dinitrosoterephthalamide
- Azo-based blowing agents such as barium azodicarboxylate and norrium azodicarboxylate
- p p-oxybisbenzenesul
- Sulfohydrazide-based blowing agent "k, le IIa”or; a "so-based blowing agent; 5- phenyltetrazole, azobis Tetrazole based blowing agents such as tetrazole diguanidine and azobistetrazoleaminoguanidine; and inorganic based blowing agents such as sodium bicarbonate.
- foaming agents may be used as a mixture of two or more.
- the amount of these pyrolytic foaming agents to be added may be selected so that the expansion ratio falls within the above range according to the type of the foaming agent, and is 0.1 to 100 parts by mass per 100 parts by mass of the thermoplastic elastomer composition. It is preferable to use parts by mass.
- Examples of the volatile foaming agent include aliphatic hydrocarbons such as propane, butane and pentane; alicyclic hydrocarbons such as cyclobutane, cyclopentane and cyclohexane; and chlorodifluoromethane.
- foaming agents may be used as a mixture of two or more.
- the amount of the volatile foaming agent to be added may be selected so that the expansion ratio falls within the above range according to the type thereof, but it is 0.1 to 100 parts by mass with respect to 100 parts by mass of the thermoplastic elastomer composition. And preferably.
- a foam can be formed using a supercritical fluid.
- the supercritical fluid include nitrogen and carbon dioxide. These supercritical fluids may be used as a mixture of two or more. The amount of gas injected when foaming is performed using these supercritical fluids depends on the type of the supercritical fluid, and may be selected so that the expansion ratio falls within the above range.
- the hollow particle type foaming agent is a thermoplastic resin thermally expandable microsphere containing an expanding agent and having a thermoplastic resin as an outer shell component.
- the expanding agent constituting the hollow particle type foaming agent include those similar to the volatile foaming agent. Divided into thermally expandable microspheres The proportion of the expanding agent is preferably 5 to 30 parts by mass.
- thermoplastic resins include (meth) acrylonitrile, (meth) acrylate, halogenated butyl, halogenated bilidene, styrene-based monomer, butyl acetate, butadiene, chloroprene, and vinylpyridine.
- a thermoplastic resin such as a copolymer can be used.
- This thermoplastic resin is composed of dibutylbenzene, ethylene glycol (meth) atalylate, triethylene glycol di (meth) atalylate, trimethylolpropane tri (meth) acrylate, 1,3-butylene glycol di (meth) It may be cross-linked or made cross-linkable with a cross-linking agent such as acrylate, aryl (meth) phthalate, triacryl formal, triallyl isocyanurate.
- the mass average particle diameter of this hollow particle type foaming agent is usually preferably from 1 to 100 ⁇ m.
- the amount of the hollow particle-type foaming agent to be added may be selected so that the expansion ratio falls within the above range according to the kind thereof, but it is 0.1 to 100 parts by mass of the thermoplastic elastomer composition.
- foaming agents a pyrolytic foaming agent, a volatile foaming agent, a hollow particle foaming agent, and a supercritical fluid
- sodium bicarbonate if necessary, in order to adjust the bubble diameter to be produced.
- a foam nucleating agent such as da, citrate or talc may be used in combination.
- the foaming nucleating agent is preferably used in an amount of 0.01 to 10 parts by mass with respect to 100 parts by mass of the thermoplastic elastomer composition.
- thermoplastic elastomer composition composition does not rely on chemical crosslinking.
- It has a three-dimensional network structure, is excellent in elastic recovery and flexibility, is uniformly foamed, has high independent foaming properties, has uniform foam shape and size, and has excellent surface appearance It is suitable as a material of the molded article of the present invention obtained by irradiating with an electron beam.
- the method for adding the foaming agent and the method for molding the foam are not particularly limited.
- the following method can be used.
- thermoplastic elastomer composition A method in which a thermoplastic elastomer composition and a foaming agent are melt-kneaded in a melt extruder and then extruded.
- a blowing agent is added to the thermoplastic elastomer composition by dry blending, and the mixture is extruded by a melt extruder.
- thermoplastic elastomer composition (4) A method in which a foaming agent is added to the thermoplastic elastomer composition, followed by injection molding.
- thermoplastic elastomer composition and a foaming agent melt-kneaded in a melt extruder and then injection-molded.
- thermoplastic elastomer composition and a foaming agent are melt-kneaded by a melt extruder, then placed in a press mold, and subjected to hot press molding.
- the extrusion molding method (1)-(3) is preferred.
- the optimum temperature and residence time are appropriately determined depending on the expansion ratio, the type and amount of the thermoplastic elastomer component, and the type and amount of the foaming agent. Determined force Normally a residence time of 15 seconds to 5 minutes at a temperature of 140-280 ° C.
- the molded product of the present invention is obtained by irradiating the pre-irradiated molded product with an electron beam.
- the thermoplastic elastomer composition used in the present invention has a three-dimensional network structure not depending on chemical crosslinking, and is excellent in elastic recovery and flexibility. However, when this is irradiated with an electron beam, the thermoplastic elastomer composition can be used. Radical reaction of the non-conjugated gen and ethylene components in one composition results in a three-dimensional bridge structure, which further increases elastic recovery.
- crosslinking is performed by electron beam irradiation, there is no contamination by a crosslinking agent.
- the electron beam is permeable to the synthetic resin, and the degree of transmission depends on the thickness of the synthetic resin and the kinetic energy of the electron beam.
- a molded article having a uniform degree of crosslinking in the thickness direction can be obtained.
- the electron beam accelerating voltage is preferably 100-2, 000kV, more preferably 200-1, OOOkV with respect to the above molded product, but if it is smaller than 100kV, it is captured and absorbed in the surface layer.
- the proportion of electrons is relatively large, the number of electron beams transmitted through the molded article is reduced, and the internal crosslinking is delayed as compared with the surface layer portion, resulting in a difference in the degree of crosslinking.
- it is larger than 2.0 OOkV it is not preferable because mechanical strength is reduced due to molecular cutting.
- the irradiation amount of the electron beam at this time is preferably in the range of 10 to 1,000 kGy (Gy: gray, jZkg), and more preferably in the range of 100 to 800 kGy for crosslinking and curing. If it is less than lOkGy, the degree of cross-linking will be small, while if it exceeds 1, OOOkGy, the mechanical strength will decrease due to molecular cutting, which is not preferable.
- the crosslinking effect by electron beam irradiation can be represented by the product of the electron beam acceleration voltage and the irradiation amount.
- the product of the electron beam acceleration voltage (kV) and the irradiation dose (kGy) is preferably 1,000-2,000,000 (kV-kGy), more preferably ⁇ 10,000-500,000 (kV-kGy). If it is less than 1,000 (kV 'kGy), the proportion of electrons captured and absorbed in the surface layer becomes relatively large, and the number of electron beams that pass through the molded product decreases. Is delayed, resulting in a difference in the degree of crosslinking, which is not preferred. On the other hand, if it is larger than 2,000,000 (kV-kGy), it is not preferable because mechanical strength is reduced due to molecular cutting.
- thermoplastic elastomer composition which is a raw material of the molded article of the present invention, to add heat. A little.
- the amount of addition was such that the total of the ethylene ' ⁇ -olefin copolymer (1), the crystalline polyethylene resin (2), and the conjugated gen block copolymer (3) was 100 parts by mass. In this case, the amount is 0.01 to 10 parts by mass, preferably 0.1 to 5 parts by mass. If the amount is less than 0.01 part by mass, no further effect of improving the rubber elasticity is observed, whereas if the amount exceeds 10 parts by mass, the effect of improving the rubber elasticity is saturated.
- crosslinking aid examples include sulfur or sulfur compounds such as powdered sulfur, colloidal sulfur, precipitated sulfur, insoluble sulfur, surface-treated sulfur, and dipentamethylenethiuramtetrasulfide; ⁇ -quinone oxime, ⁇ , ⁇ Oxime compounds, such as dibenzoylquinone oxime, ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, 1, 4 Butanediol di (meth) acrylate, 1, 6 Xandiol di (meth) Atharylate, 1, 9-nonanediol di (meth) atalylate, glycerin di (meth) atalylate, polyethylene glycol (PEG # 200) di (meth) atalylate, polyethylene glycol (PEG # 400) di (meth) atari Rate, polyethylene glycol
- crosslinking aids ⁇ , ⁇ , dibenzoylquinone oxime, N, N, 1 m-phenyl-bismaleimide, trimethylolpropane tri (meth) acrylate, and dibutyl benzene are preferred. .
- crosslinking assistants can be used alone or in combination of two or more.
- the crosslinking assistant may be added during the production of the thermoplastic elastomer composition, or may be added after the production of the thermoplastic elastomer composition.
- thermoplastic elastomer composition and the crosslinking aid may be mixed by dynamic heat treatment, or may be simply mixed with the thermoplastic elastomer composition.
- the molded article When irradiating the electron beam, when the molded article has a three-dimensional shape such as a tubular shape, it is preferable that the irradiation is performed while rotating. By carrying out in this manner, the entire surface of the molded article can be uniformly irradiated with the electron beam, and uniform and sufficient cross-linking can be achieved.
- Irradiation can be performed in a reciprocating manner, and the surface can be alternately turned upside down, thereby irradiating the surface uniformly.
- Irradiation may be performed continuously or may be performed batchwise after extrusion.
- the compression set of the molded article after the electron beam irradiation can be made smaller than that before the electron beam irradiation.
- the molded article of the present invention after electron beam irradiation has a cyclohexane-insoluble component of usually 50-1. 00 mass 0/0, preferably 60- 100 wt 0/0, more preferably 70 to 100 wt%.
- the cyclohexane-insoluble component is a barometer that indicates the degree of crosslinking in a thermoplastic elastomer composition by irradiating a molded article with an electron beam.
- the mass of the insoluble components (filler, pigment, etc.) and (b) the mass of the crystalline polyethylene resin (2) and the conjugated gen block copolymer (3) in the sample before immersion in cyclohexane The reduced value is referred to as “corrected final mass (p)”.
- the cyclohexane-insoluble content as the crosslink density is determined by the following formula.
- a-olefin polymer resin polypropylene, etc.
- it is treated in the same way as crystalline polyethylene resin (2) and calculated.
- the cyclohexane-insoluble content of the molded article after crosslinking by electron beam irradiation is less than 50% by mass, crosslinking by electron beam irradiation is insufficient and rubber elasticity is poor.
- the cyclohexane-insoluble content can be easily adjusted by setting the product of the electron beam acceleration voltage (kV) and the irradiation dose (kGy) to 1,000 to 2,000,000 (kV-kGy). it can.
- the molded article of the present invention obtained in this way has excellent elasticity and extremely low compression set.
- thermoplastic elastomer composition is processed into rubber, plastic, a thermoplastic elastomer composition other than the present invention, glass, metal, cloth, wood, and the like, and processed by laminating, joining, and the like to form a kagami product. can do.
- the rubber includes ethylene ' ⁇ -olefin copolymer rubber and its maleic anhydride graft polymer, ethylene' ⁇ -olefin 'non-conjugated copolymer rubber, styrene' butadiene rubber, butadiene rubber, isoprene rubber.
- examples include rubber, nitrile rubber and hydrogenated products thereof, acryl rubber, silicone rubber, fluorine rubber, butyl rubber, and natural rubber.
- plastics include ionomer, aminoacrylamide polymer, polyethylene and its maleic anhydride graft polymer, polyisobutylene, ethylene monochloride butyl polymer, ethylene butyl alcohol polymer, ethylene butyl acetate copolymer, polyethylene oxide, ethylene Acrylic acid copolymer, polypropylene and its maleic anhydride graft polymer, polyisobutylene and its maleic anhydride graft polymer, chlorinated polypropylene, 4-methylpentene-1 resin, polystyrene, ABS resin, ACS resin, AS resin , AES resin, ASA resin, MBS resin, acrylic resin, methacrylic resin, chlorinated vinyl resin, Shiridani biureiden resin, polyamide resin, polycarbonate, acrylic resin, methacrylic resin, butyl chloride ⁇ Fats, chloride chloride Resin, Bur alcohol resin, Buracetal resin, Methyl methacrylate resin, Fluorine resin, Polyether resin, Polyethylene
- thermoplastic elastomer examples include chlorinated polyethylene-based thermoplastic elastomer, syndiotactic 1,2 polybutadiene, simple blend type olefin-based thermoplastic elastomer, implant-type olefin-based thermoplastic elastomer, and dynamically cross-linked olefin.
- Thermoplastic Elastomer Poly-Shidani Bull-based Thermoplastic Elastomer, Polyurethane Thermoplastic Elastomer, Polyester Thermoplastic Elastomer, Polyamide Thermoplastic Elastomer, Fluorine Thermoplastic Elastomer, Styrene Butadiene Rubber Of hydrogenated styrene Hydrogenated maleic anhydride graft polymer of tajen rubber, hydrogenated butadiene rubber, maleic anhydride grafted polymer of hydrogenated butadiene rubber, hydrogenated isoprene rubber, maleic anhydride of hydrogenated isoprene rubber Acid graft polymer, hydrogenated styrene 'isoprene rubber, hydrogenated maleic anhydride grafted styrene' isoprene rubber, hydrogenated styrene / butadiene block copolymer, styrene 'isoprene block copolymer Hydrogen
- metals include stainless steel, aluminum, iron, copper, nickel, zinc, lead, tin, and alloys such as nickel-zinc alloy, iron-zinc alloy, lead-tin alloy used in automobiles, ships, and home appliances. No.
- Oil-extended ethylene propylene 5-ethylidene norbornene copolymer rubber (manufactured by JSR Corporation, product name " ⁇ 98 ⁇ ", ethylene content 79 mol%, propylene content 21 mol) 0/0, iodide Moti ⁇ 15, paraffin oil 75phr oil extended) 58 parts by mass, as a crystalline polyethylene ⁇ (2), linear low density polyethylene (LLDPE) (manufactured by Japan Polychem Corporation, trade name “Novatec LL UF423 ”, crystallinity 40%, melting point 124 ° C by DSC) 21 parts by mass, conjugated block copolymer (3) shown below 21 parts by mass, ⁇ -olefin polymer as crystalline polypropylene ( 5 parts by mass (product name: Novatec PP BC5CW, crystallinity 70%) manufactured by Nippon Polychem Co., Ltd., and a tetraester-type polymer hindered phenol-based antioxidant (Ciba Special
- thermoplastic elastomer composition was pelletized by a feeder-ruder (manufactured by Moriyama Seisakusho) to obtain a desired thermoplastic elastomer composition. Then, using the obtained thermoplastic elastomer composition, an injection molding machine (Toshiba Machine Co., Ltd.) A 2 mm thick, 120 mm long, and 120 mm wide sheet-like molded product before irradiation was manufactured using the machine model “IS-90B”.
- reaction solution When the absorption of hydrogen is completed, the reaction solution is returned to normal temperature and normal pressure, extracted from the reaction vessel, and then the reaction solution is stirred into water and the solvent is removed by steam distillation.
- Hydrogenated block polymer of A-B-A structure (A is polybutadiene with low 1,2-vinyl bond content, B is polybutadiene with high 1,2-bulk bond content), which is an added gen-based polymer was.
- the hydrogenation rate of the obtained hydrogenated conjugated block copolymer is 99%, the weight average molecular weight is 300,000, and the polybutadiene A block in the first stage of the polymer before hydrogenation has a Bull bond content of 15%, before hydrogenation.
- the Bull bond content of the second-stage polybutadiene B block of the polymer was 78%.
- the melt flow rate of the polymer after hydrogenation measured at 230 ° C and 21.2N was 2.5 g / lOmin.
- Example 2 The same procedure as in Example 1 was carried out except that 1 part by mass of trimethylolpropane trimethaphthalate (manufactured by Kyoeisha-Danigaku Co., Ltd., product name “Light Ester TMP”) was added as a crosslinking aid.
- trimethylolpropane trimethaphthalate manufactured by Kyoeisha-Danigaku Co., Ltd., product name “Light Ester TMP”
- Example 2 The procedure was the same as in Example 1 except that no electron beam irradiation was performed.
- LLDPE Linear low-density polyethylene
- the hydrogenation rate is 99%, the weight average molecular weight is 300,000, the polybutadiene A block in the first stage of the polymer before hydrogenation has a Bull bond content of 15%, The binding content was 78%.
- the melt flow rate of the polymer after hydrogenation measured at 230 ° C and 21.2 N was 2.5 gZl0 min.
- Crystalline polypropylene (product name: Novatec PP BC5CWJ, crystallinity 70%, manufactured by Japan Polychem Corporation)
- Tetraester type polymer hindered phenol-based antioxidant (Cilba Specialty Chemicals Co., Ltd., product name "Ilganox 1010")
- Trimethylolpropane trimetatalate (manufactured by Kyoeisha I-Dagakusha, product name "Light Ester ⁇ PJ)
- the obtained sheet-shaped thermoplastic elastomer composition before irradiation is formed into a thin film piece in the thickness direction using a microtome, and then dyed with RuO or the like.
- Durometer A hardness Measured according to JIS-K6253 and used as an index of flexibility.
- the molded article of the thermoplastic elastomer composition of the present invention is excellent in elasticity, and has excellent elastic recovery, flexibility, scratch resistance, oil resistance, and appearance, which are extremely small in compression set. It can be suitably used.
- interior and exterior skin materials such as bumpers, exterior moldings, gaskets for wind seals, gaskets for door seals, gaskets for trunk seals, roof side rails, emblems, inner panels, door trims, console boxes, weather strips, etc.
- Rollers for information equipment such as seals for general machinery and equipment, packing for capacitors and weak electrical components, sealants for water tanks, sealants for fuel cell stacks, skin materials or housings, films for electronic components, Flat panels for semiconductors and liquid crystal displays Film for electronic display (FPD) manufacturing process, sealing materials for electronic components such as hard disk gaskets, image protective films such as photographs, decorative films for construction materials, medical equipment components, wire coating materials, daily necessities, caps And various industrial hoses, tubes, belts, sports goods, and other general processed products.
- FPD liquid crystal displays
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Abstract
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WO2015098339A1 (ja) * | 2013-12-27 | 2015-07-02 | 日本バルカー工業株式会社 | 架橋ゴム成形体の製造方法 |
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WO2015098339A1 (ja) * | 2013-12-27 | 2015-07-02 | 日本バルカー工業株式会社 | 架橋ゴム成形体の製造方法 |
JP2015127358A (ja) * | 2013-12-27 | 2015-07-09 | 日本バルカー工業株式会社 | 架橋ゴム成形体の製造方法 |
CN103992548A (zh) * | 2014-04-30 | 2014-08-20 | 中国科学院化学研究所 | 一种用于3d打印的改性低密度聚乙烯纳米复合材料及其制备方法 |
CN103992548B (zh) * | 2014-04-30 | 2015-07-08 | 中国科学院化学研究所 | 一种用于3d打印的改性低密度聚乙烯纳米复合材料及其制备方法 |
Also Published As
Publication number | Publication date |
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EP1686149A4 (en) | 2006-11-08 |
CN1777635A (zh) | 2006-05-24 |
KR20060107270A (ko) | 2006-10-13 |
US20060063850A1 (en) | 2006-03-23 |
EP1686149A1 (en) | 2006-08-02 |
JP2005146137A (ja) | 2005-06-09 |
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