WO2017188270A1 - 熱可塑性エラストマー組成物及びその製造方法、並びに、エラストマー成形体 - Google Patents
熱可塑性エラストマー組成物及びその製造方法、並びに、エラストマー成形体 Download PDFInfo
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
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- B29K2077/00—Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material
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- C08J2477/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
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- C08L2205/00—Polymer mixtures characterised by other features
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- C08L2207/04—Thermoplastic elastomer
Definitions
- the present invention relates to a thermoplastic elastomer composition, a method for producing the same, and an elastomer molded body.
- Thermoplastic elastomer is an extremely useful material in the industry because it can be melted at the processing temperature during molding and can be molded by a known resin molding method.
- a thermoplastic elastomer for example, in JP-A-2006-131663 (Patent Document 1), a side chain containing a hydrogen-bonding cross-linking site having a carbonyl-containing group and a nitrogen-containing heterocyclic ring is covalently bonded.
- Patent Document 1 a side chain containing a hydrogen-bonding cross-linking site having a carbonyl-containing group and a nitrogen-containing heterocyclic ring is covalently bonded.
- a thermoplastic elastomer composed of an elastomeric polymer having a glass transition point of 25 ° C. or less having other side chains containing a crosslinking site is disclosed.
- thermoplastic elastomer described in Patent Document 1 is not always sufficient in terms of tensile strength and oil resistance. Therefore, the thermoplastic elastomer described in Patent Document 1 has a high possibility of coming into contact with oil, and it has been difficult to use it for applications that require oil resistance (for example, materials for automobile parts).
- the present invention has been made in view of the above-described problems of the prior art, and provides a thermoplastic elastomer composition capable of having a sufficiently high tensile strength and excellent oil resistance, and a method for producing the same.
- the purpose is to provide.
- this invention aims at providing the elastomer molded object formed by shape
- the inventors of the present invention have a side chain containing a hydrogen-bonded bridging site having a carbonyl-containing group and / or a nitrogen-containing heterocyclic ring, and a glass transition point of 25. And an elastomeric polymer (B) having a hydrogen bond crosslinking site and a covalent bond crosslinking site in the side chain and having a glass transition point of 25 ° C. or less.
- At least one elastomer component selected from the group, an organized clay having a content ratio of 20 parts by mass or less with respect to 100 parts by mass of the elastomer component, and a polymer other than the elastomeric polymers (A) and (B) A polymer (Z) having an SP value of 9.0 or more and a SP value of 0.5 or more larger than the SP value of the elastomer component;
- thermoplastic elastomer composition of the present invention has an elastomeric polymer having a side chain containing a hydrogen-bonding crosslinking site having a carbonyl-containing group and / or a nitrogen-containing heterocycle and having a glass transition point of 25 ° C. or lower.
- A and at least one selected from the group consisting of an elastomeric polymer (B) containing a hydrogen-bonding cross-linking site and a covalent cross-linking site in the side chain and having a glass transition point of 25 ° C. or lower.
- a kind of elastomer component Organized clay having a content ratio of 20 parts by mass or less with respect to 100 parts by mass of the elastomer component, A polymer other than the elastomeric polymers (A) and (B), having an SP value of 9.0 or more and a SP value of 0.5 or more larger than the SP value of the elastomer component ( Z) It contains.
- the SP value of the polymer (Z) is preferably 9.0 to 16.0, and more preferably 10.0 to 15.0.
- the polymer (Z) preferably has a reactive functional group for the elastomer component, and the reactive functional group is a hydroxyl group, amino group, imino group, ester group, More preferably, it is at least one of an acid anhydride group and a carboxy group.
- the main chain of the polymer contained as the elastomer component is a diene rubber, a hydrogenated diene rubber, an olefin rubber, or a hydrogenated polystyrene. It is composed of at least one selected from a polymer elastomeric polymer, a polyolefin elastomeric polymer, a polyvinyl chloride elastomeric polymer, a polyurethane elastomeric polymer, a polyester elastomeric polymer, and a polyamide elastomeric polymer Is preferred.
- the elastomer component may have a maleic anhydride-modified elastomeric polymer and at least one substituent selected from a hydroxyl group, a thiol group, and an amino group.
- It may have at least one substituent selected from a good triazole, hydroxyl group, thiol group and amino group, and may have at least one substituent selected from pyridine, hydroxyl group, thiol group and amino group It may have at least one substituent among good thiadiazole, hydroxyl group, thiol group and amino group, or may have at least one substituent among imidazole, hydroxyl group, thiol group and amino group May have at least one substituent selected from good isocyanurate, hydroxyl group, thiol group and amino group Hydantoin, trishydroxyethyl isocyanurate, sulfamide, pentaerythritol, 2,4-diamino-6-phenyl-1, which may have at least one substituent selected from lyazine, hydroxyl group, thiol group and amino group, It is preferably at least one selected from the group consisting of 3,5-triazine and a reaction product with at least one compound of
- the method for producing a thermoplastic elastomer composition of the present invention comprises an elastomeric polymer (D) having a cyclic acid anhydride group in the side chain; Organized clay, A polymer (Z) having an SP value of 9.0 or more and a SP value of 0.5 or more larger than the SP value of the elastomeric polymer (D); A first step of mixing to obtain a mixture; Compound (I) that reacts with the cyclic acid anhydride group to form a hydrogen-bonding cross-linking site in the mixture, and a covalent bond cross-linking site that reacts with the compound (I) and the cyclic acid anhydride group 0.1 to 10 parts by mass of 100 parts by mass of the elastomeric polymer (D) having at least one cyclic acid anhydride group in the side chain of at least one raw material compound among the mixed raw materials of the compound (II) forming A second step of obtaining a thermoplastic elastomer composition by adding at a ratio of parts,
- At least one elastomer component Organized clay having a content ratio of 20 parts by mass or less with respect to 100 parts by mass of the elastomer component, A polymer other than the elastomeric polymers (A) and (B), having an SP value of 9.0 or more and a SP value of 0.5 or more larger than the SP value of the elastomer component ( Z) And a composition comprising In the first step, using the organized clay at a ratio such that the content of the organized clay in the thermoplastic elastomer composition is 20 parts by mass or less with respect to 100 parts by mass of the elastomer component, In this method, the elastomeric polymer (D), the organoclay, and the polymer (Z) are mixed.
- the elastomeric polymer (D) is a maleic anhydride-modified elastomeric polymer
- the elastomer component is a maleic anhydride-modified elastomeric polymer and at least one of a triazole, a hydroxyl group, a thiol group, and an amino group that may have at least one substituent selected from a hydroxyl group, a thiol group, and an amino group.
- At least one of thiadiazole, hydroxyl group, thiol group and amino group which may have at least one substituent among pyridine, hydroxyl group, thiol group and amino group which may have one kind of substituent.
- hydroxyl group, thiol group and amino group optionally having at least one substituent selected from imidazole, hydroxyl group, thiol group and amino group optionally having one substituent group At least one of triazine, hydroxyl group, thiol group and amino group optionally having at least one substituent.
- hydantoin trishydroxyethyl isocyanurate, sulfamide, pentaerythritol, 2,4-diamino-6-phenyl-1,3,5-triazine, which may have one substituent, and polyether polyol It is preferable that it is at least 1 sort (s) selected from the group which consists of a reaction material with at least 1 sort (s) of compound.
- the elastomer molded body of the present invention is formed by molding the thermoplastic elastomer composition of the present invention.
- Such an elastomer molded body of the present invention is preferably a molded body for use in any application selected from the group consisting of civil engineering / building materials, industrial parts, electrical / electronic parts and daily necessities. Consists of parts, gap filling materials, building seal materials, pipe joint seal materials, piping protection materials, wiring protection materials, heat insulating materials, packing materials, cushioning materials, electrical insulators, contact rubber sheets, sports and leisure goods, and miscellaneous goods More preferably, it is a molded body for use in one application selected from the group.
- the elastomer molded body of the present invention is used for one application selected from the group consisting of packing for automobile engines, constant velocity joint boots, weather strips, dampers, wiper blades, insulating covers, and hood seal rubbers. It is preferable that it is a molded article.
- thermoplastic elastomer composition capable of having a sufficiently high tensile strength and excellent oil resistance, and a method for producing the same. Furthermore, according to this invention, it becomes possible to provide the elastomer molded object formed by shape
- thermoplastic elastomer composition has an elastomeric polymer (A) having a side chain containing a hydrogen-bonding crosslinking site having a carbonyl-containing group and / or a nitrogen-containing heterocycle and having a glass transition point of 25 ° C. or lower. ), And at least one selected from the group consisting of an elastomeric polymer (B) having a hydrogen bond crosslinking site and a covalent bond site in the side chain and having a glass transition point of 25 ° C.
- A elastomeric polymer having a side chain containing a hydrogen-bonding crosslinking site having a carbonyl-containing group and / or a nitrogen-containing heterocycle and having a glass transition point of 25 ° C. or lower.
- B elastomeric polymer having a hydrogen bond crosslinking site and a covalent bond site in the side chain and having a glass transition point of 25 ° C.
- An elastomer component Organized clay having a content ratio of 20 parts by mass or less with respect to 100 parts by mass of the elastomer component, A polymer other than the elastomeric polymers (A) and (B), having an SP value of 9.0 or more and a SP value of 0.5 or more larger than the SP value of the elastomer component ( Z) It contains.
- Such an elastomer component is at least one selected from the group consisting of the above-mentioned elastomeric polymers (A) to (B).
- “side chains” refer to side chains and terminals of the elastomeric polymer.
- a side chain containing a hydrogen-bonding cross-linked site having a carbonyl-containing group and / or a nitrogen-containing heterocycle hereinafter, sometimes referred to as“ side chain (a) ”for convenience) means an elastomeric polymer.
- a carbonyl-containing group and / or a nitrogen-containing heterocyclic ring (more preferably a carbonyl-containing group) Group and nitrogen-containing heterocycle) has a chemically stable bond (covalent bond).
- the side chain contains a hydrogen-bonding crosslinking site and a covalent bonding site means a side chain having a hydrogen-bonding crosslinking site (hereinafter referred to as “side chain (a ′)” for convenience).
- side chain (b) a side chain having a covalent crosslinking site
- the side chain of the polymer contains a hydrogen bonding crosslinking site.
- a side chain having both a hydrogen bonding crosslinking site and a covalent crosslinking site a hydrogen bonding crosslinking site and a covalent bond in one side chain.
- Side chains including both cross-linked sites are sometimes referred to as “side chains (c)”. A concept that includes the case where both binding crosslink sites are contained. is there.
- Such main chains of the elastomeric polymers (A) to (B) are generally known natural polymers or synthetic polymers.
- the molecule is not particularly limited as long as it is made of a polymer having a glass transition point of room temperature (25 ° C.) or less (it may be made of a so-called elastomer).
- the elastomeric polymers (A) to (B) have, for example, an elastomeric polymer having a glass transition point of room temperature (25 ° C.) or lower such as a natural polymer or a synthetic polymer as a main chain, and a carbonyl-containing group and And / or containing a side chain (a) containing a hydrogen-bonding cross-linked moiety having a nitrogen-containing heterocycle; mainly composed of an elastomeric polymer having a glass transition point of room temperature (25 ° C.) or less, such as a natural polymer or a synthetic polymer Containing a side chain (a ′) having a hydrogen-bonding cross-linking site and a side chain (b) having a covalent cross-linking site as a side chain; glass such as a natural polymer or a synthetic polymer An elastomeric polymer having a transition point of room temperature (25 ° C.) or lower and having a side chain (c) including both
- Examples of the main chains of the elastomeric polymers (A) to (B) include natural rubber (NR) and isoprene rubber.
- IR natural rubber
- BR butadiene rubber
- SBR 1,2-butadiene rubber
- NBR styrene-butadiene rubber
- NBR acrylonitrile-butadiene rubber
- IIR chloroprene rubber
- EPDM butyl rubber
- EPM ethylene-propylene-diene rubber
- EPM ethylene-acrylic rubber
- EBM chlorosulfonated polyethylene
- acrylic rubber, fluororubber polyethylene rubber Olef such as polypropylene rubber
- a tin-based rubber an epichlorohydrin rubber
- a polysulfide rubber a silicone rubber
- urethanef ethylene rubber Olef
- urethanef such as polypropylene rubber
- a tin-based rubber such as polypropylene rubber
- the main chain of the elastomeric polymers (A) to (B) is composed of an elastomeric polymer containing a resin component.
- a resin component for example, polystyrene-based elastomeric polymer (for example, SBS, SIS, SEBS, etc.) that may be hydrogenated, polyolefin-based elastomeric polymer, polyvinyl chloride-based elastomeric polymer, polyurethane-based elastomeric polymer , Polyester-based elastomeric polymers, polyamide-based elastomeric polymers, and the like.
- Examples of the main chain of the elastomeric polymers (A) to (B) include diene rubber, hydrogenated diene rubber, olefin rubber, and hydrogenated. At least selected from polystyrene-based elastomeric polymer, polyolefin-based elastomeric polymer, polyvinyl chloride-based elastomeric polymer, polyurethane-based elastomeric polymer, polyester-based elastomeric polymer, and polyamide-based elastomeric polymer One is preferred.
- the main chain of the elastomeric polymers (A) to (B) is a diene rubber from the viewpoint that there is no double bond that tends to age. From the viewpoint of low cost and high reactivity (having many double bonds capable of ene reaction of a compound such as maleic anhydride), diene rubber is preferable. preferable.
- the elastomeric polymers (A) to (B) may be in a liquid or solid state, and the molecular weight thereof is not particularly limited, and uses for which the thermoplastic elastomer composition of the present invention is used, required physical properties, etc. It can be selected as appropriate according to the conditions.
- the elastomeric polymers (A) to (B) are preferably in a liquid state, for example, a main chain portion.
- a diene rubber such as isoprene rubber or butadiene rubber
- the weight average molecular weight of the main chain portion is 1,000 to 100 in order to make the elastomeric polymers (A) to (B) liquid.
- the elastomeric polymers (A) to (B) are preferably in a solid state, for example, the main chain portion is isoprene rubber, butadiene rubber or the like.
- the weight average molecular weight of the main chain portion is 100,000 or more. It is particularly preferably about 1,000,000 to 1,500,000.
- Such a weight average molecular weight is a weight average molecular weight (in terms of polystyrene) measured by gel permeation chromatography (GPC).
- GPC gel permeation chromatography
- THF tetrahydrofuran
- the elastomeric polymers (A) to (B) can be used in combination of two or more.
- the mixing ratio of the respective elastomeric polymers can be set to an arbitrary ratio according to the use in which the thermoplastic elastomer composition of the present invention is used or the required physical properties.
- the glass transition point of the elastomeric polymers (A) to (B) is 25 ° C. or less as described above. If the glass transition point of the elastomeric polymer is within this range, the thermoplastic elastomer composition of the present invention exhibits rubber-like elasticity at room temperature.
- the “glass transition point” is a glass transition point measured by differential scanning calorimetry (DSC-Differential Scanning Calorimetry). In the measurement, the rate of temperature rise is preferably 10 ° C./min.
- the main chain of the elastomeric polymers (A) to (B) (the main chain of the polymer contained as the elastomer component) has a glass transition point of the elastomeric polymers (A) to (B) of 25 ° C.
- the molded article comprising the thermoplastic elastomer composition obtained exhibits rubber-like elasticity at room temperature (25 ° C.), natural rubber (NR), isoprene rubber (IR), butadiene rubber (BR), 1,2-butadiene rubber , Diene rubbers such as styrene-butadiene rubber (SBR), ethylene-propylene-diene rubber (EPDM), butyl rubber (IIR); ethylene-propylene rubber (EPM), ethylene-acrylic rubber (AEM), ethylene-butene rubber (EBM) And the like.
- NR natural rubber
- IR isoprene rubber
- BR butadiene rubber
- EPDM ethylene-propylene-diene rubber
- IIR butyl rubber
- EPM ethylene-propylene rubber
- AEM ethylene-acrylic rubber
- EBM ethylene-butene rubber
- thermoplastic elastomer composition when an olefin rubber is used for each of the main chains of the elastomeric polymers (A) to (B), the tensile strength of the resulting thermoplastic elastomer composition is improved and there is no double bond. Degradation tends to be more sufficiently suppressed.
- the amount of bound styrene of the styrene-butadiene rubber (SBR) that can be used for the elastomeric polymers (A) to (B), the hydrogenation rate of the hydrogenated elastomeric polymer, and the like are not particularly limited.
- the ratio can be adjusted to any ratio according to the use of the thermoplastic elastomer composition, the physical properties required of the composition, and the like.
- the main chain of the elastomeric polymers (A) to (B) (the main chain of the polymer contained as the elastomer component), ethylene-propylene-diene rubber (EPDM), ethylene-acrylic rubber (AEM), ethylene-propylene
- EPDM ethylene-propylene-diene rubber
- AEM ethylene-acrylic rubber
- EPM ethylene-propylene
- EBM ethylene-butene rubber
- ethylene-propylene-diene rubber EPDM
- ethylene-acrylic rubber AEM
- ethylene-propylene rubber EPM
- ethylene-butene rubber EBM
- the ethylene content is preferably 10 to 90 mol%, more preferably 30 to 90 mol%. If the ethylene content is within this range, it is preferable because it is excellent in compression set, mechanical strength, particularly tensile strength when it is used as a thermoplastic elastomer (composition).
- the elastomeric polymers (A) to (B) are preferably amorphous from the viewpoint of good rubbery elasticity at room temperature.
- such elastomeric polymers (A) to (B) may be elastomers having a crystallinity (crystal structure) in part, but even in this case, the degree of crystallinity is 10%. It is preferably less than (particularly preferably 5 to 0%).
- crystallinity is measured by using an X-ray diffractometer (for example, trade name “MiniFlex300” manufactured by Rigaku Corporation) as a measuring device, measuring a diffraction peak, and integrating a scattering peak derived from crystallinity / amorphous. It can be determined by calculating the ratio.
- the SP value of the elastomer component is preferably 6.0 to 13.0, more preferably 7.0 to 12.0. It is particularly preferably from 7.0 to 9.0, and most preferably from 7.0 to 8.5. If the SP value is less than the lower limit, the polarity is too low and the miscibility with other resins tends to be low. On the other hand, if the upper limit is exceeded, the polarity is too high. Mixability tends to be low. A method for measuring such an SP value will be described later.
- the elastomeric polymers (A) to (B) include, as a side chain, a side chain (a) containing a hydrogen-bonded crosslinking site having a carbonyl-containing group and / or a nitrogen-containing heterocycle; A side chain (a ′) containing a hydrogen-bonding crosslinking site and a side chain (b) containing a covalent bonding site; and a side chain (c) containing a hydrogen-bonding crosslinking site and a covalent crosslinking site. And at least one of them.
- the side chain (c) can also be said to be a side chain that functions as a side chain (b) while functioning as a side chain (a ').
- each side chain will be described.
- the side chain (a ′) containing a hydrogen-bonding cross-linking site has a group capable of forming a cross-link by hydrogen bonding (for example, a hydroxyl group, a hydrogen-bonding cross-linking site contained in the side chain (a) described later). Any side chain that forms a hydrogen bond based on the group may be used, and the structure is not particularly limited.
- the hydrogen bond crosslinking site is a site where polymers (elastomers) are crosslinked by hydrogen bonding.
- Cross-linking by hydrogen bonding includes a hydrogen acceptor (such as a group containing an atom containing a lone pair) and a hydrogen donor (such as a group including a hydrogen atom covalently bonded to an atom having a large electronegativity). Therefore, when both the hydrogen acceptor and the hydrogen donor are not present between the side chains of the elastomers, no crosslinks due to hydrogen bonds are formed. Therefore, a hydrogen bonding cross-linked site is present in the system only when both hydrogen acceptors and hydrogen donors exist between the side chains of the elastomers.
- a hydrogen acceptor such as a group containing an atom containing a lone pair
- a hydrogen donor such as a group including a hydrogen atom covalently bonded to an atom having a large electronegativity
- a hydrogen acceptor for example, a carbonyl group
- a hydrogen donor for example, a hydroxyl group
- a hydrogen-bonding bridging site in the side chain (a ′) a hydrogen bond having a carbonyl-containing group and / or a nitrogen-containing heterocycle described below from the viewpoint of forming a stronger hydrogen bond. It is preferable that it is an ionic crosslinking site (hydrogen bonding crosslinking site contained in the side chain (a)). That is, as the side chain (a ′), the side chain (a) described later is more preferable. From the same viewpoint, the hydrogen-bonding cross-linking site in the side chain (a ′) is more preferably a hydrogen-bonding cross-linking site having a carbonyl-containing group and a nitrogen-containing heterocycle.
- the side chain (a) containing a hydrogen-bonded bridging site having a carbonyl-containing group and / or a nitrogen-containing heterocyclic ring may be any as long as it has a carbonyl-containing group and / or a nitrogen-containing heterocyclic ring. It is not limited. As such a hydrogen bonding cross-linking site, those having a carbonyl-containing group and a nitrogen-containing heterocyclic ring are more preferred.
- Such a carbonyl-containing group is not particularly limited as long as it contains a carbonyl group, and specific examples thereof include amide, ester, imide, carboxy group, carbonyl group and the like.
- Such a carbonyl-containing group may be a group introduced into the main chain (polymer of the main chain portion) using a compound capable of introducing a carbonyl-containing group into the main chain.
- the compound capable of introducing such a carbonyl-containing group into the main chain is not particularly limited, and specific examples thereof include ketones, carboxylic acids and derivatives thereof.
- carboxylic acid examples include organic acids having a saturated or unsaturated hydrocarbon group, and the hydrocarbon group may be any of aliphatic, alicyclic, aromatic and the like.
- carboxylic acid derivatives include carboxylic acid anhydrides, amino acids, thiocarboxylic acids (mercapto group-containing carboxylic acids), esters, amino acids, ketones, amides, imides, dicarboxylic acids and monoesters thereof. Etc.
- carboxylic acid and derivatives thereof include malonic acid, maleic acid, succinic acid, glutaric acid, phthalic acid, isophthalic acid, terephthalic acid, p-phenylenediacetic acid, and p-hydroxybenzoic acid.
- Acids carboxylic acids such as p-aminobenzoic acid and mercaptoacetic acid, and those carboxylic acids containing substituents; acids such as succinic anhydride, maleic anhydride, glutaric anhydride, phthalic anhydride, propionic anhydride, benzoic anhydride Anhydrides; aliphatic esters such as maleic acid ester, malonic acid ester, succinic acid ester, glutaric acid ester and ethyl acetate; phthalic acid ester, isophthalic acid ester, terephthalic acid ester, ethyl-m-aminobenzoate, methyl-p- Aromatic esters such as hydroxybenzoate; quinone, anne Ketones such as laquinone and naphthoquinone; glycine, tyrosine, bicine, alanine, valine, leucine, serine, threonine, lysine, aspartic acid,
- maleamide maleamic acid (maleic monoamide), succinic monoamide, 5-hydroxyvaleramide, N-acetylethanolamine, N, N′-hexamethylenebis (acetamide), malonamide, cycloserine, 4-acetamidophenol, amides such as p-acetamidobenzoic acid; imides such as maleimide and succinimide; and the like.
- the compound capable of introducing a carbonyl group is preferably a cyclic acid anhydride such as succinic anhydride, maleic anhydride, glutaric anhydride, and phthalic anhydride, and is maleic anhydride. It is particularly preferred.
- the nitrogen-containing heterocycle may be introduced into the main chain directly or via an organic group, and the configuration thereof is particularly limited. It is not a thing.
- a nitrogen-containing heterocycle may be used even if it contains a heteroatom other than a nitrogen atom in the heterocycle, for example, a sulfur atom, an oxygen atom, a phosphorus atom, etc., as long as it contains a nitrogen atom in the heterocycle. it can.
- thermoplastic elastomer composition of the present invention if it has a heterocyclic structure, the hydrogen bond forming a bridge becomes stronger, and the resulting thermoplastic elastomer composition of the present invention This is preferable because the tensile strength is further improved.
- the nitrogen-containing heterocyclic ring may have a substituent, and examples of the substituent include alkyl groups such as a methyl group, an ethyl group, a (iso) propyl group, and a hexyl group; a methoxy group and an ethoxy group.
- Alkoxy groups such as (iso) propoxy group; groups consisting of halogen atoms such as fluorine atom, chlorine atom, bromine atom and iodine atom; cyano group; amino group; aromatic hydrocarbon group; ester group; ether group; A thioether group; and the like can be used in combination.
- the substitution position of these substituents is not particularly limited, and the number of substituents is not limited.
- the nitrogen-containing heterocycle may or may not have aromaticity, but the permanent compression of the thermoplastic elastomer composition of the present invention obtained when having aromaticity. This is preferable because strain and mechanical strength are further improved.
- such a nitrogen-containing heterocyclic ring is not particularly limited, but from the viewpoints that hydrogen bonds become stronger and compression set and mechanical strength are further improved, a 5-membered ring or a 6-membered ring. It is preferable that Specific examples of such nitrogen-containing heterocycle include pyrrololine, pyrrolidone, oxindole (2-oxindole), indoxyl (3-oxindole), dioxindole, isatin, indolyl, phthalimidine, ⁇ -Isoindigo, monoporphyrin, diporphyrin, triporphyrin, azaporphyrin, phthalocyanine, hemoglobin, uroporphyrin, chlorophyll, phyroerythrin, imidazole, pyrazole, triazole, tetrazole, benzimidazole, benzopyrazole, benzotriazole, imidazoline, imidazolone, imidazolidone Hydan
- the substituents X, Y, and Z in the general formulas (10) and (11) are each independently a hydrogen atom, an alkyl group having 1 to 30 carbon atoms, an aralkyl group having 7 to 20 carbon atoms, or 6 to 6 carbon atoms. 20 aryl groups or amino groups. Note that any one of X and Y in the general formula (10) is not a hydrogen atom, and similarly, at least one of X, Y and Z in the general formula (11) is not a hydrogen atom.
- substituents X, Y, and Z include, in addition to hydrogen atoms and amino groups, specifically, for example, methyl group, ethyl group, propyl group, butyl group, pentyl group, octyl group, dodecyl group, stearyl Linear alkyl groups such as isopropyl groups, isobutyl groups, s-butyl groups, t-butyl groups, isopentyl groups, neopentyl groups, t-pentyl groups, 1-methylbutyl groups, 1-methylheptyl groups, 2- Branched alkyl groups such as ethylhexyl group; aralkyl groups such as benzyl group and phenethyl group; aryl groups such as phenyl group, tolyl group (o-, m-, p-), dimethylphenyl group, mesityl group; It is done.
- substituents X, Y, and Z are alkyl groups, particularly butyl, octyl, dodecyl, isopropyl, and 2-ethylhexyl groups. This is preferable because the processability of is improved.
- the following compounds are preferably exemplified for the nitrogen-containing 6-membered ring. These may also have the above-described various substituents (for example, the substituents that the above-mentioned nitrogen-containing heterocycle may have), or may be hydrogenated or eliminated. .
- a condensed product of the nitrogen-containing heterocycle and a benzene ring or a nitrogen-containing heterocycle can be used, and specific examples thereof include the following condensed rings.
- These condensed rings may also have the above-described various substituents, and may have hydrogen atoms added or eliminated.
- thermoplastic elastomer composition of the present invention to be obtained is excellent in recyclability, compression set, hardness and mechanical strength, particularly tensile strength. Therefore, a triazole ring, an isocyanurate ring, It is preferably at least one selected from thiadiazole ring, pyridine ring, imidazole ring, triazine ring and hydantoin ring, and at least selected from triazole ring, thiadiazole ring, pyridine ring, imidazole ring and hydantoin ring One type is preferable.
- the side chain (a) includes both the carbonyl-containing group and the nitrogen-containing heterocycle
- the carbonyl-containing group and the nitrogen-containing heterocycle are introduced into the main chain as side chains independent of each other.
- the carbonyl-containing group and the nitrogen-containing heterocycle are introduced into the main chain as one side chain bonded through different groups.
- a side chain containing a hydrogen-bonded cross-linking site having the carbonyl-containing group and the nitrogen-containing heterocycle is introduced into the main chain as one side chain.
- A is a nitrogen-containing heterocyclic ring
- B is a single bond
- an oxygen atom and a formula: NR ′
- R ′ is a hydrogen atom or an alkyl group having 1 to 10 carbon atoms.
- the side chain containing the structural part represented by is introduced into the main chain as one side chain.
- the hydrogen-bonding cross-linked site of the side chain (a) contains a structural portion represented by the general formula (1).
- the nitrogen-containing heterocyclic ring A in the above formula (1) specifically includes the nitrogen-containing heterocyclic rings exemplified above.
- Specific examples of the substituent B in the above formula (1) include, for example, a single bond; an oxygen atom, a sulfur atom, or a formula: NR ′ (R ′ is a hydrogen atom or an alkyl group having 1 to 10 carbon atoms).
- NR ′ is simply referred to as “amino group NR ′”); the number of carbon atoms that may contain these atoms or groups An alkylene group having 1 to 20 carbon atoms or an aralkylene group; an alkylene ether group having 1 to 20 carbon atoms (an alkyleneoxy group such as an —O—CH 2 CH 2 — group) or an alkyleneamino group having these atoms or groups as terminals.
- alkylene thioether group (alkylene thio group, for example, —S—CH 2 CH 2 — group);
- alkylene thio group for example, —S—CH 2 CH 2 — group;
- a xylene ether group (aralkyleneoxy group), an aralkylene amino group, or an aralkylene thioether group;
- examples of the alkyl group having 1 to 10 carbon atoms that can be selected as R ′ in the amino group NR ′ include methyl, ethyl, propyl, butyl, pentyl, hexyl, A heptyl group, an octyl group, a nonyl group, a decyl group, etc. are mentioned.
- the substituent B is an oxygen atom, a sulfur atom or an amino group forming a conjugated system; an alkylene ether group having 1 to 20 carbon atoms, an alkyleneamino group or an alkylene having these atoms or groups at the terminal. It is preferably a thioether group, an amino group (NH), an alkyleneamino group (—NH—CH 2 — group, —NH—CH 2 CH 2 — group, —NH—CH 2 CH 2 CH 2 — group), alkylene An ether group (—O—CH 2 — group, —O—CH 2 CH 2 — group, —O—CH 2 CH 2 CH 2 — group) is particularly preferred.
- the side chain (a) is a side chain containing a hydrogen-bonded cross-linking site having the carbonyl-containing group and the nitrogen-containing heterocycle
- the hydrogen bond having the carbonyl-containing group and the nitrogen-containing heterocycle is more preferably a side chain introduced into the polymer main chain at the ⁇ -position or ⁇ -position as one side chain represented by the following formula (2) or (3).
- A is a nitrogen-containing heterocyclic ring
- B and D are each independently a single bond; an oxygen atom, an amino group NR ′ (R ′ is a hydrogen atom or an alkyl group having 1 to 10 carbon atoms) or A sulfur atom; or an organic group that may contain these atoms or groups.
- the nitrogen-containing heterocyclic ring A is basically the same as the nitrogen-containing heterocyclic ring A of the above formula (1), and the substituents B and D are each independently of the substituent B of the above formula (1). The same as above.
- the substituent D in the formula (3) is a single bond; an alkylene having 1 to 20 carbon atoms which may contain an oxygen atom, a nitrogen atom or a sulfur atom among those exemplified as the substituent B in the formula (1). It is preferable to form a conjugated system of a group or an aralkylene group, and a single bond is particularly preferable. That is, it is preferable to form an alkyleneamino group or an aralkyleneamino group having 1 to 20 carbon atoms which may contain an oxygen atom, a nitrogen atom or a sulfur atom together with the imide nitrogen of the above formula (3). It is particularly preferred that the nitrogen-containing heterocycle is directly bonded to the imide nitrogen (single bond).
- the substituent D includes a single bond; the above-described alkylene ether or aralkylene ether group having 1 to 20 carbon atoms having an oxygen atom, sulfur atom or amino group as a terminal; methylene including isomers; Group, ethylene group, propylene group, butylene group, hexylene group, phenylene group, xylylene group and the like.
- the hydrogen-bond cross-linking site of the side chain (a) is Formula (101):
- A is a nitrogen-containing heterocyclic ring.
- the nitrogen-containing heterocycle A in the formula (101) is basically the same as the nitrogen-containing heterocycle A in the formula (1).
- the hydrogen bond cross-linking site of such a side chain (a) is represented by the following general formula (102) from the viewpoint of high modulus and high breaking strength:
- the side chain (a) is particularly preferably a group represented by the general formula (102).
- the ratio of the carbonyl-containing group and the nitrogen-containing heterocycle of the thermoplastic elastomer is not particularly limited, and is in the range of 1: 1 to 3: 1 (more preferably 1: 1, 2: 1 or 3: 1). It is preferable because it is easy to form a complementary interaction and can be easily manufactured.
- the side chain (a) containing a hydrogen-bonded cross-linking site having such a carbonyl-containing group and / or a nitrogen-containing heterocycle has a ratio of 0.1 to 50 mol% with respect to 100 mol% of the main chain portion ( It is preferably introduced at a rate of 1 to 30 mol%.
- the introduction rate of such side chain (a) is less than 0.1 mol%, the tensile strength at the time of crosslinking may not be sufficient.
- it exceeds 50 mol% the crosslinking density increases and rubber elasticity is lost. There is.
- the introduction rate is within the above-mentioned range, the crosslinks are efficiently formed between the molecules by the interaction between the side chains of the thermoplastic elastomer, so the tensile strength at the time of crosslinking is high and the recyclability is excellent. Therefore, it is preferable.
- the introduction rate is such that the side chain (a) includes a side chain (ai) containing a hydrogen-bonded cross-linking site having the carbonyl-containing group and a hydrogen bond cross-linking site having the nitrogen-containing heterocycle.
- the side chain (aii) containing the carbonyl-containing group and the side chain (ai-ii) containing the nitrogen-containing heterocyclic ring According to the ratio, these are considered as one side chain (a) and calculated.
- the introduction rate may be considered based on the larger side chain.
- the introduction rate is, for example, when the main chain portion is ethylene-propylene rubber (EPM), the amount of the monomer having the side chain portion introduced is 0.1 to 50 per 100 units of ethylene and propylene monomer units. About unit.
- EPM ethylene-propylene rubber
- a polymer having a cyclic acid anhydride group (more preferably a maleic anhydride group) as a functional group in a polymer (material for forming an elastomeric polymer) that forms the main chain after the reaction.
- the compound capable of introducing such a nitrogen-containing heterocycle may be the nitrogen-containing heterocycle itself exemplified above, and a substituent that reacts with a cyclic acid anhydride group such as maleic anhydride (for example, hydroxyl group, thiol).
- nitrogen-containing heterocycle in the side chain (a)
- nitrogen heterocycle is referred to as “nitrogen-containing n-membered ring compound (n ⁇ 3)”.
- the bonding positions described below are based on the IUPAC nomenclature. For example, in the case of a compound having three nitrogen atoms having an unshared electron pair, the bonding position is determined by the order based on the IUPAC nomenclature. Specifically, the bonding positions are indicated on the 5-membered, 6-membered and condensed nitrogen-containing heterocycles exemplified above.
- the bonding position of the nitrogen-containing n-membered ring compound bonded to the copolymer directly or via an organic group is not particularly limited, and any bonding position (position 1 to position n) But you can. Preferably, it is the 1-position or 3-position to n-position.
- the nitrogen-containing n-membered ring compound contains one nitrogen atom (for example, a pyridine ring), the chelate is easily formed in the molecule, and the physical properties such as tensile strength when the composition is obtained are excellent.
- the (n-1) position is preferred.
- the elastomeric polymer is easy to form crosslinks due to hydrogen bonding, ionic bonding, coordination bonding, etc. between the molecules of the elastomeric polymer, and is excellent in recyclability. , Tend to be excellent in mechanical properties, particularly tensile strength.
- the “side chain (b) containing a covalently bonded cross-linking site” is a covalent cross-linking site (containing an amino group described later) on an atom (usually a carbon atom) forming the main chain of the elastomeric polymer.
- Functional groups that can generate at least one bond selected from the group consisting of amides, esters, lactones, urethanes, ethers, thiourethanes, and thioethers by reacting with “compounds that form covalent bonds” such as compounds ) Has a chemically stable bond (covalent bond).
- the side chain (b) is a side chain containing a covalent cross-linking site, but has a covalent bond site and a group capable of hydrogen bonding, and hydrogen bonds between the side chains.
- a hydrogen donor that can be used as a side chain (c) described later (which can form a hydrogen bond between the side chains of the elastomers, and
- both hydrogen acceptors are not included, for example, when only a side chain containing an ester group (—COO—) is present in the system, the ester groups (—COO—)
- a hydrogen-donating hydrogen donor site such as a carboxy group or a triazole ring, and a hydrogen acceptor Part
- hydrogen bonds are formed between the side chains of the elastomers, so that
- the site where the hydrogen bond is formed becomes a hydrogen-bonding crosslinking site.
- the side chain (b) may be used as the side chain (c) depending on the structure itself, the structure of the side chain (b) and the type of substituents of the other side chain, etc.) .
- the “covalent bonding crosslinking site” referred to here is a site that crosslinks polymers (elastomers) by covalent bonding.
- the side chain (b) containing such a covalently cross-linked site is not particularly limited.
- an elastomeric polymer having a functional group in the side chain (polymer for forming the main chain portion) and the functional group It is preferable to contain a covalent crosslinking site formed by reacting with a compound that reacts with a group to form a covalent crosslinking site (compound that generates a covalent bond).
- Crosslinking at the covalent cross-linking site of such a side chain (b) is formed by at least one bond selected from the group consisting of amide, ester, lactone, urethane, ether, thiourethane and thioether. Is preferred.
- the functional group possessed by the polymer constituting the main chain is a functional group capable of producing at least one bond selected from the group consisting of amide, ester, lactone, urethane, ether, thiourethane and thioether. It is preferable.
- Examples of such “compound that forms a covalent bond site (compound that forms a covalent bond)” include, for example, two or more amino groups and / or imino groups (both amino groups and imino groups are combined in one molecule).
- the “compound that forms a covalent crosslinkable site (compound that forms a covalent bond)” refers to the type of substituent that the compound has, the degree of progress of the reaction when the compound is reacted, Depending on the above, it becomes a compound that can introduce both the hydrogen-bonding cross-linking site and the covalent-bonding cross-linking site (for example, when a cross-linking site by a covalent bond is formed using a compound having 3 or more hydroxyl groups). Depending on the progress of the reaction, two hydroxyl groups may react with the functional group of the elastomeric polymer having a functional group in the side chain, and the remaining one hydroxyl group may remain as a hydroxyl group.
- the “compound that forms a covalent bond site (compound that forms a covalent bond)” exemplified here also includes “a compound that forms both a hydrogen bond bridge site and a covalent bond site”. obtain. From this point of view, when the side chain (b) is formed, the compound is appropriately selected from “compounds that form a covalent bond site (compound that generates a covalent bond)” according to the intended design. Or the side chain (b) may be formed by appropriately controlling the degree of progress of the reaction.
- Polyamine compounds that can be used as such “compound that forms a covalent bond site (compound that forms a covalent bond)” include, for example, the following alicyclic amines, aliphatic polyamines, aromatic polyamines, and the like. And nitrogen heterocyclic amines.
- alicyclic amines include, for example, 1-amino-3-aminomethyl-3,5,5-trimethylcyclohexane, bis- (4-aminocyclohexyl) methane, diaminocyclohexane, di- (Aminomethyl) cyclohexane and the like.
- the aliphatic polyamine is not particularly limited, and examples thereof include methylene diamine, ethylene diamine, propylene diamine, 1,2-diaminopropane, 1,3-diaminopentane, hexamethylene diamine, diaminoheptane, diaminododecane, diethylenetriamine, Diethylaminopropylamine, N-aminoethylpiperazine, triethylenetetramine, N, N'-dimethylethylenediamine, N, N'-diethylethylenediamine, N, N'-diisopropylethylenediamine, N, N'-dimethyl-1,3-propane Diamine, N, N'-diethyl-1,3-propanediamine, N, N'-diisopropyl-1,3-propanediamine, N, N'-dimethyl-1,6-hexanediamine, N, N'-diethyl -1, - he
- the aromatic polyamine and the nitrogen-containing heterocyclic amine are not particularly limited.
- examples include sulfone and 3-amino-1,2,4-triazole.
- one or more of the hydrogen atoms may be substituted with an alkyl group, an alkylene group, an aralkylene group, an oxy group, an acyl group, a halogen atom, or the like. It may contain a hetero atom such as a sulfur atom.
- the polyamine compounds may be used singly or in combination of two or more.
- the mixing ratio when two or more types are used in combination is an arbitrary ratio depending on the use in which the thermoplastic elastomer (composition) of the present invention is used, the physical properties required for the thermoplastic elastomer (composition) of the present invention, and the like. Can be adjusted.
- hexamethylene diamine, N, N′-dimethyl-1,6-hexanediamine, diaminodiphenyl sulfone and the like are preferable because of their high effect of improving compression set, mechanical strength, particularly tensile strength. .
- the polyol compound is a compound having two or more hydroxyl groups
- the molecular weight and skeleton thereof are not particularly limited.
- the following polyether polyols, polyester polyols, other polyols, and mixed polyols thereof may be used. Can be mentioned.
- polyether polyols include ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, glycerin, 1,1,1-trimethylolpropane, 1,2,5-hexanetriol, 1 , 3-butanediol, 1,4-butanediol, 4,4′-dihydroxyphenylpropane, 4,4′-dihydroxyphenylmethane, at least one selected from polyhydric alcohols such as pentaerythritol, ethylene oxide, propylene Polyol obtained by adding at least one selected from oxide, butylene oxide, styrene oxide, etc .; polyoxytetramethylene oxide; and the like may be used alone or in combination of two or more. Good
- polyester polyol examples include ethylene glycol, propylene glycol, butanediol pentanediol, hexanediol, cyclohexanedimethanol, glycerin, 1,1,1-trimethylolpropane, and other low molecular polyols.
- polystyrene resin examples include, for example, polymer polyol, polycarbonate polyol; polybutadiene polyol; hydrogenated polybutadiene polyol; acrylic polyol; ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, butanediol, pentanediol, Hexanediol, polyethylene glycol laurylamine (eg, N, N-bis (2-hydroxyethyl) laurylamine), polypropylene glycol laurylamine (eg, N, N-bis (2-methyl-2-hydroxyethyl) laurylamine) Polyethylene glycol octylamine (eg, N, N-bis (2-hydroxyethyl) octylamine), polypropylene glycol octyl Ruamine (eg, N, N-bis (2-methyl-2-hydroxyethyl) octylamine), polyethylene glycol stearylamine (e
- polyisocyanate compound examples include 2,4-tolylene diisocyanate (2,4-TDI), 2,6-tolylene diisocyanate (2,6-TDI), 4,4′-diphenylmethane diisocyanate (4,4′- MDI), 2,4′-diphenylmethane diisocyanate (2,4′-MDI), 1,4-phenylene diisocyanate, xylylene diisocyanate (XDI), tetramethylxylylene diisocyanate (TMXDI), tolidine diisocyanate (TODI), 1, Aromatic polyisocyanates such as 5-naphthalene diisocyanate (NDI), hexamethylene diisocyanate (HDI), trimethylhexamethylene diisocyanate (TMHDI), lysine diisocyanate, norbornane diisocyanate methyl (NB) DI) aliphatic polyisocyanate, transcyclohexane-1,4-
- the polythiol compound is a compound having two or more thiol groups
- its molecular weight and skeleton are not particularly limited. Specific examples thereof include methanedithiol, 1,3-butanedithiol, 1,4-butanedithiol, 2,3-butanedithiol, 1,2-benzenedithiol, 1,3-benzenedithiol, 1,4-benzenedithiol, 1,10-decanedithiol, 1,2-ethanedithiol, 1,6-hexanedithiol, , 9-nonanedithiol, 1,8-octanedithiol, 1,5-pentanedithiol, 1,2-propanedithiol, 1,3-propadithiol, toluene-3,4-dithiol, 3,6-dichloro-1, 2-benzenedithiol, 1,5-naphthalenedithiol, 1,2-benzenedimethanethiol,
- the functional group possessed by the polymer constituting the main chain that reacts with such a “compound that forms a covalent bond site (compound that forms a covalent bond)” includes amide, ester, lactone, urethane, and thiourethane.
- the elastomeric polymer (B) having the side chain (b) has a cross-linking at the covalent cross-linking site in the side chain (b), that is, the above-mentioned “covalent cross-linking with the functional group”. Having at least one covalent bond formed in a molecule by reaction with a compound that forms a site (compound that forms a covalent bond), and in particular, lactone, urethane, ether, thiourethane and thioether In the case where the cross-link is formed by at least one bond selected from the group consisting of: preferably 2 or more, more preferably 2 to 20, more preferably 2 to 10 More preferably.
- the crosslinking at the covalent crosslinking site of the side chain (b) contains a tertiary amino bond (—N ⁇ ) or an ester bond (—COO—).
- the compression set and mechanical strength (breaking elongation, breaking strength) of the composition) are preferable because they can be more easily improved.
- an elastomer having a side chain containing a group capable of forming a hydrogen bond with respect to a tertiary amino bond (—N ⁇ ) and an ester bond (—COO—) is included.
- the covalently crosslinked site can function as a side chain (c) described later.
- the elastomeric polymer (B) having the side chain (a) as the side chain (a ′) that is, the elastomeric polymer (B) has both side chains (a) and (b).
- the crosslinking at the covalent crosslinking site has the tertiary amino bond and / or the ester bond
- these groups and the side chain (a) carbonyl-containing group and / or nitrogen-containing group
- the crosslink density can be further improved by hydrogen bonding (interaction) with a group in the side chain having a heterocyclic ring.
- a side chain (b) having such a structure containing a tertiary amino bond (—N ⁇ ) and an ester bond (—COO—)
- a covalently linked cross-linking site is formed.
- polyethylene glycol laurylamine eg, N, N-bis (2-hydroxyethyl) laurylamine
- polypropylene glycol laurylamine eg, N, N-bis (2-methyl-2-hydroxyethyl) laurylamine
- polyethylene glycol octylamine eg, N, N-bis (2-hydroxyethyl) octylamine
- polypropylene glycol octylamine eg, N, N-bis (2-methyl-2-hydroxyethyl) octylamine
- Such a side chain (c) is a side chain containing both a hydrogen-bonding crosslinking site and a covalent bonding site in one side chain.
- a hydrogen-bonding cross-linking site contained in the side chain (c) is the same as the hydrogen-bonding cross-linking site described in the side chain (a ′), and the hydrogen-bonding cross-linking site in the side chain (a).
- part is preferable.
- the thing similar to the covalent bond crosslinkable part in a side chain (b) can be utilized (The same bridge
- Such a side chain (c) reacts with an elastomeric polymer having a functional group in the side chain (polymer for forming the main chain portion) and the functional group to form a hydrogen-bonding crosslinking site and a covalent bond.
- a side chain formed by reacting a compound that forms both of the crosslinking sites is preferable.
- a compound that forms both such a hydrogen-bonding crosslinking site and a covalent-bonding crosslinking site a compound that introduces both a hydrogen-bonding crosslinking site and a covalent-bonding crosslinking site
- a heterocyclic ring particularly preferably a nitrogen-containing compound
- a compound having a heterocycle) and capable of forming a covalent crosslinking site is preferable, among which a heterocycle-containing polyol, a heterocycle-containing polyamine, a heterocycle-containing polythiol, and the like are more preferable. preferable.
- the polyol, polyamine, and polythiol containing such a heterocyclic ring may form the above-mentioned “covalently linked crosslinking site” except that it has a heterocyclic ring (particularly preferably a nitrogen-containing heterocyclic ring).
- the same polyols, polyamines and polythiols as described in “Possible compounds (compounds forming a covalent bond)” can be used as appropriate.
- Such a heterocyclic ring-containing polyol is not particularly limited, and examples thereof include bis, tris (2-hydroxyethyl) isocyanurate, kojic acid, dihydroxydithiane, and trishydroxyethyltriazine.
- the heterocycle-containing polyamine is not particularly limited, and examples thereof include acetoguanamine, piperazine, bis (aminopropyl) piperazine, benzoguanamine, and melamine. Further, examples of such a heterocyclic ring-containing polythiol include dimercaptothiadiazole and tris-[(3-mercaptopropionyloxy) -ethyl] -isocyanurate.
- the side chain (c) an elastomeric polymer having a functional group in the side chain (polymer for forming the main chain part) is reacted with a polyol, polyamine, polythiol, etc. containing a heterocyclic ring. It is preferable that the side chain is obtained.
- the main chain that reacts with “a compound that forms both a hydrogen bonding crosslinking site and a covalent crosslinking site (a compound that introduces both a hydrogen bonding crosslinking site and a covalent crosslinking site)” is formed.
- the functional group possessed by the polymer is preferably a functional group capable of producing (generating: forming) at least one bond selected from the group consisting of amide, ester, lactone, urethane, thiourethane and thioether.
- Preferred examples include a cyclic acid anhydride group, a hydroxyl group, an amino group, a carboxy group, an isocyanate group, and a thiol group.
- the elastomeric polymer (B) having the side chain (c) has at least one crosslink in the molecule at the covalent crosslink site in the side chain (c),
- a bridge is formed by at least one bond selected from the group consisting of lactone, urethane, ether, thiourethane and thioether
- it preferably has 2 or more, and has 2 to 20 More preferably, 2 to 10 are more preferable.
- the crosslinking at the covalent crosslinking site of the side chain (c) contains a tertiary amino bond (—N ⁇ ) or an ester bond (—COO—). This is preferable because the compression set and mechanical strength (breaking elongation, breaking strength) of the composition) are further improved.
- the bridge at the covalent crosslinking site contains a tertiary amino bond (—N ⁇ ), an ester bond (—COO—),
- a tertiary amino bond (—N ⁇ )
- an ester bond (—COO—)
- the tertiary amino bond (—N ⁇ ) or ester bond (—COO—) in the side chain having a covalent cross-linking site forms a hydrogen bond with the other side chain.
- the covalent bond cross-linking site containing such a tertiary amino bond (—N ⁇ ) and ester bond (—COO—) is also provided with a hydrogen bond cross-linking site, and the side chain (c) Can function.
- the share containing the tertiary amino bond and / or the ester bond is included.
- the cross-linking density is further improved. Is considered possible.
- a compound capable of reacting with a functional group of the polymer constituting the main chain to form a covalently crosslinked site containing the tertiary amino bond and / or the ester bond examples include polyethylene glycol laurylamine (for example, N, N-bis (2-hydroxyethyl) laurylamine), polypropylene glycol laurylamine (Eg, N, N-bis (2-methyl-2-hydroxyethyl) laurylamine), polyethylene glycol octylamine (eg, N, N-bis (2-hydroxyethyl) octylamine), polypropylene glycol octylamine (eg, N, N-bis (2-methyl-2-hydroxyethyl) o Tilamine), polyethylene glycol stearylamine (eg, N, N-bis (2-hydroxyethyl) stearylamine), polypropy
- the crosslink at the covalent crosslink site of the side chain (b) and / or side chain (c) contains at least one structure represented by any of the following general formulas (4) to (6). More preferably, G in the formula contains a tertiary amino bond or an ester bond (in the following structure, when it contains a hydrogen-bonding cross-linked site, the side having that structure) The chain is used as the side chain (c)).
- E, J, K and L are each independently a single bond; an oxygen atom, an amino group NR ′ (R ′ is a hydrogen atom or an alkyl group having 1 to 10 carbon atoms) .) Or a sulfur atom; or an organic group that may contain these atoms or groups, G may contain an oxygen atom, a sulfur atom, or a nitrogen atom, and may have a linear, branched, or cyclic carbon number. 1 to 20 hydrocarbon groups.
- substituent G examples include a methylene group, an ethylene group, a 1,3-propylene group, a 1,4-butylene group, a 1,5-pentylene group, a 1,6-hexylene group, and a 1,7-heptylene group.
- Alkylene groups such as 1,8-octylene group, 1,9-nonylene group, 1,10-decylene group, 1,11-undecylene group, 1,12-dodecylene group; N, N-diethyldodecylamine-2, 2'-diyl, N, N-dipropyldodecylamine-2,2'-diyl, N, N-diethyloctylamine-2,2'-diyl, N, N-dipropyloctylamine-2,2'- Diyl, N, N-diethylstearylamine-2,2′-diyl, N, N-dipropylstearylamine-2,2′-diyl, divinyl, bivalent group such as 1,4-cyclohexylene group Alicyclic charcoal Hydrogen group; divalent aromatic hydrocarbon group such as 1,4-phenylene group, 1,2-phenylene group, 1,3-phenylene group, 1,
- the substituent G in such a formula preferably has an isocyanurate group (isocyanurate ring) structure from the viewpoint of high heat resistance and high strength due to hydrogen bonding.
- the substituent G in such a formula is a group represented by the following general formula (111) and the following general formula (112) from the viewpoint of high heat resistance and high strength due to hydrogen bonding. It is more preferable that it is a group represented.
- the crosslinking at the covalent crosslinking site of the side chain (c) is bonded to the main chain of the elastomeric polymer at the ⁇ -position or ⁇ -position. It is preferable to contain at least one of the structures represented, and it is more preferred that G in the formula contains a tertiary amino group (the structures shown in the formulas (7) to (9) are a hydroxyl group and a carbonyl group. And a side chain having such a structure can function as a side chain (c)).
- the substituents E, J, K and L are each independently the same as the substituents E, J, K and L in the above formulas (4) to (6).
- the substituent G is basically the same as the substituent G in the above formulas (4) to (6).
- the cross-linking at the covalent cross-linking site is preferably formed by a reaction between a cyclic acid anhydride group and a hydroxyl group or an amino group and / or an imino group. .
- the polymer that forms the main chain portion after the reaction has a cyclic acid anhydride group (for example, maleic anhydride group) as a functional group
- the cyclic acid anhydride group of the polymer a hydroxyl group or an amino group, and It is formed by reacting with a compound that forms the above-described covalently crosslinked site having an imino group (compound that generates a covalent bond) to form a site that is crosslinked by a covalent bond, thereby crosslinking between the polymers.
- Crosslinking may be used.
- the crosslinking at the covalent crosslinking site is at least one selected from the group consisting of amide, ester, lactone, urethane, ether, thiourethane and thioether. More preferably, it is formed by bonding.
- the side chain (a ′), the side chain (a), the side chain (b), and the side chain (c) have been described above.
- Each group (structure) of the side chain in such a polymer is NMR, It can be confirmed by a commonly used analytical means such as an IR spectrum.
- the elastomeric polymer (A) is an elastomeric polymer having the side chain (a) and a glass transition point of 25 ° C. or less, and the elastomeric polymer (B) has a hydrogen-bonding cross-linked site in the side chain. And an elastomeric polymer having a glass transition point of 25 ° C. or less (a polymer having both side chains (a ′) and side chains (b) as side chains, side chains on side chains) A polymer containing at least one chain (c)).
- an elastomer component one of the elastomeric polymers (A) to (B) may be used alone, or two or more of them may be used in combination. Good.
- the elastomeric polymer (B) may be a polymer having both a side chain (a ′) and a side chain (b) or a polymer having a side chain (c). From the viewpoint that a stronger hydrogen bond is formed as the hydrogen bonding cross-linking site contained in the side chain of the elastomeric polymer (B), hydrogen bonding cross-linking having a carbonyl-containing group and / or a nitrogen-containing heterocycle. It is preferably a site (more preferably a hydrogen-bonding cross-linked site having a carbonyl-containing group and a nitrogen-containing heterocycle).
- elastomer component selected from the group which consists of such elastomeric polymers (A) and (B)
- maleic anhydride-modified elastomeric polymer and at least one of triazole, hydroxyl group, thiol group and amino group which may have at least one substituent selected from hydroxyl group, thiol group and amino group
- At least one of thiadiazole, hydroxyl group, thiol group and amino group which may have at least one substituent among pyridine, hydroxyl group, thiol group and amino group which may have species substituent
- At least one of imidazole, hydroxyl group, thiol group and amino group optionally having a substituent group
- At least one of triazine, hydroxyl group, thiol group and amino group which may have at least one substituent among isocyanurate, hydroxyl group, thiol group and amino
- the method for producing such elastomeric polymers (A) to (B) is not particularly limited, and the side chain (a) as described above; the side chain (a ′) and the side chain (b);
- a known method capable of introducing at least one selected from the group consisting of the side chain (c) as a side chain of an elastomeric polymer having a glass transition point of 25 ° C. or lower can be appropriately employed.
- a method for producing the elastomeric polymer (B) a method described in JP-A-2006-131663 may be employed.
- a cyclic acid anhydride group for example, a maleic anhydride group
- a compound that reacts with the cyclic acid anhydride group to form a covalent bond cross-linking site compound that forms a covalent bond
- a hydrogen bond that reacts with the cyclic acid anhydride group on the elastomeric polymer in the side chain
- Each side chain may be introduced at the same time using a mixture (mixed raw material) with a compound (a compound capable of introducing a nitrogen-containing heterocycle) that forms a sexually cross-linked site.
- an elastomeric polymer having a functional group for example, cyclic acid anhydride group
- a functional group for example, cyclic acid anhydride group
- An elastomeric polymer may be mentioned as a suitable compound), and the elastomeric polymer is reacted with the functional group to form a hydrogen-bonding cross-linked site, and the functional group is reacted with the functional group to form a hydrogen bond.
- the elastomeric polymer having the side chain (a); the elastomeric polymer having the side chain (a ′) and the side chain (b). And / or a method for producing an elastomeric polymer having the side chain (c) (the elastomeric polymers (A) to (B)) may be employed.
- the conditions (temperature conditions, atmospheric conditions, etc.) employed in the case of such a reaction are not particularly limited, and the functional group and the compound that reacts with the functional group (the compound that forms a hydrogen-bonding cross-linked site and / or the covalent bond) What is necessary is just to set suitably according to the kind of compound which forms a binding bridge
- the elastomeric polymer (A) it may be produced by polymerizing a monomer having a hydrogen bonding site.
- the elastomeric polymer having such a functional group (for example, cyclic acid anhydride group) in the side chain is a polymer capable of forming the main chain of the above-mentioned elastomeric polymers (A) to (B). Those having a functional group in the side chain are preferred.
- the “elastomeric polymer containing a functional group in a side chain” means that a functional group (the above-described functional group such as a cyclic acid anhydride group) is chemically stable at an atom forming a main chain.
- Such a functional group is preferably a functional group capable of causing at least one bond selected from the group consisting of amide, ester, lactone, urethane, ether, thiourethane and thioether, and among them, cyclic
- An acid anhydride group, a hydroxyl group, an amino group, a carboxy group, an isocyanate group, a thiol group, and the like are preferable.
- a cyclic acid anhydride group is particularly preferable. preferable.
- a succinic anhydride group a maleic anhydride group, a glutaric anhydride group, and a phthalic anhydride group are preferable. Among them, it can be easily introduced into a polymer side chain and is industrially available. From the viewpoint of being easy, maleic anhydride groups are more preferable.
- the functional group is a cyclic acid anhydride group
- examples of the compound into which the functional group can be introduced include succinic anhydride, maleic anhydride, glutaric anhydride, phthalic anhydride, and derivatives thereof.
- a cyclic acid anhydride may be used to introduce a functional group into an elastomeric polymer (for example, a known natural polymer or synthetic polymer).
- the compound that reacts with the functional group to form a hydrogen-bonding cross-linking site is not particularly limited, but the above-mentioned “compound that forms a hydrogen-bonding cross-linking site (compound capable of introducing a nitrogen-containing heterocycle)” It is preferable to use it. Further, the compound that reacts with the functional group to form a covalent crosslinking site is not particularly limited, but the above-mentioned “compound that forms a covalent crosslinking site (compound that generates a covalent bond)” is used. Is preferred.
- a compound that forms a hydrogen-bonding cross-linked site a compound that can introduce a nitrogen-containing heterocycle
- a compound that forms a covalent-bonded cross-linked site a compound that generates a covalent bond
- the compound reacts with the functional group.
- compounds that form both hydrogen-bonding and covalent bonding sites for example, polyols, polyamines, polythiols, and the like containing nitrogen-containing heterocycles
- an elastomeric polymer having a functional group for example, a cyclic acid anhydride group
- a compound that reacts with the functional group to form a hydrogen-bonding cross-linking site, a compound that reacts with the functional group to form a hydrogen-bonding cross-linking site, and a functional group to react with a covalent bond The elastomeric polymer (A) having the side chain (a) by reacting with at least one raw material compound among the mixed raw materials of the compound forming the site, the hydrogen-bonding cross-linking site and the covalent bond in the side chain
- the elastomeric polymer having a functional group in the side chain is converted into the raw material.
- clay and an elastomeric polymer having a functional group in the side chain are mixed, and then the raw material compound is added and reacted to form a composition simultaneously with the preparation of the elastomer component ( You may employ
- the organic clay is added first when the elastomer components (elastomer polymers (A) to (B)) are produced. It is preferable to disperse the organized clay during the preparation of the elastomer component. Moreover, as a method of adding such an organized clay in advance, it is more preferable to employ a method for producing a thermoplastic elastomer composition of the present invention described later.
- the organic clay according to the present invention is not particularly limited, and for example, a clay that has been organicized with an organic agent can be suitably used.
- Such “organized clay” is clay in a state in which an organic agent such as a quaternary ammonium salt is introduced between layers (for example, a state in which an organic agent is inserted between layers). It is preferable.
- the method for introducing the organic agent between the clay layers is not particularly limited. For example, by utilizing the cation exchange property of clay such as montmorillonite which is a layered mineral, the organic agent is added between the clay layers. It is possible to adopt the introduction method as appropriate.
- the organized clay can be easily treated. Obtainable.
- peeling of the clay layer can be facilitated, and the single-layer clay can be more efficiently dispersed in the organic solvent or the resin.
- Clay for organicizing with an organic agent is not particularly limited, and known clays can be used as appropriate, for example, montmorillonite, saponite, hectorite, beidellite, stevensite, nontro. Knight, vermiculite, halloysite, mica, fluorinated mica, kaolinite (Koryolite), pyrophyllite, smectite, sericite, illite, groconite, chlorite, Examples include talc (talc), zeolite (zeolite), and hydrotalcite. Such clays may be natural or synthetic.
- the organic agent that can be used to organicize such clay is not particularly limited, and a known organic agent that can organicize clay can be appropriately used.
- hexyl can be used.
- each R independently represents at least one selected from an alkyl group and an aralkyl group, and X ⁇ represents a counter anion.
- the alkyl group that can be selected as R in the general formula (I) is preferably an alkyl group having 1 to 40 carbon atoms (more preferably 1 to 30 and even more preferably 1 to 20).
- the number of carbon atoms exceeds the above upper limit, the molecule becomes too large, and the organic agent (ammonium salt) molecule does not easily enter between the clay layers, making it difficult to make the clay organic.
- Examples of the alkyl group that can be selected as R in the general formula (I) include methyl, ethyl, propyl, hexyl, oleyl, octyl, decyl, dodecyl, octadecyl group (stearyl group), and the like.
- methyl and octadecyl groups are preferred, and octadecyl groups (stearyl groups) are more preferred from the viewpoint that 100% modulus, breaking strength, and oil resistance can be achieved in a highly balanced manner. .
- the aralkyl group that can be selected as R in the general formula (I) is preferably one having 6 to 30 carbon atoms (more preferably 6 to 25, still more preferably 6 to 20). If the number of carbon atoms exceeds the upper limit, the molecules become too large, and the organic agent (ammonium salt) molecules are unlikely to enter between the clay layers, making it difficult for the clay to become organic.
- Examples of such an aralkyl group include a benzyl group, a phenethyl group, a naphthylmethyl group, a fluorenylmethyl group, and the like. From the viewpoint that it becomes possible, a benzyl group is more preferable.
- X ⁇ represents a counter anion.
- a counter anion is not particularly limited, and examples thereof include halide ions such as chloride ion, bromide ion and iodide ion, and boron ions such as borate anion, tetrafluoroborate anion and hexafluoroborate anion. Examples include acid ions.
- an organic agent from the viewpoint that it is possible to have 100% modulus, breaking strength, and oil resistance in a highly balanced manner, it is represented by the general formula (I) and the formula An ammonium salt (A) in which two Rs in (I) are both alkyl groups, one of the two Rs in the general formula (I) is an alkyl group, and the other is an aralkyl group What contains both ammonium salt (B) is more preferable.
- Examples of such an ammonium salt (A) include dimethyl dioctadecyl ammonium salt, and examples of the ammonium salt (B) include dimethyl stearyl benzyl ammonium salt.
- a clay organized with a quaternary ammonium salt is preferably used from the viewpoint that it can have 100% modulus, breaking strength, and oil resistance in a highly balanced manner.
- a quaternary ammonium salt of clay is not particularly limited. A mixture of two or more of these can be suitably used.
- dimethylstearylbenzylammonium salt, dimethyloctadecylammonium salt, and mixtures thereof can be more suitably used from the viewpoint of improving tensile strength and heat resistance.
- a mixture of stearylbenzylammonium salt and dimethyloctadecylammonium salt can be more suitably used.
- an organized clay commercially available ones may be used, for example, trade names “Kunifil-D36”, “Kunifil-B1”, “Kunifil-HY”, etc., manufactured by Kunimine Industries, Ltd.
- the product name “Kunifil-D36” manufactured by Kunimine Industries Co., Ltd. and the product name “Esven series WX” manufactured by Hojun Co., Ltd. can be suitably used.
- such a commercially available organized clay is in a state in which an organic agent is introduced between clay layers.
- the polymer (Z) according to the present invention is a polymer component contained together with the elastomer component. And such a polymer (Z) is polymers other than the above-mentioned elastomeric polymer (A) and elastomeric polymer (B).
- the polymer usable as the polymer (Z) may be any polymer selected from polymers other than the above-mentioned elastomeric polymers (A) and (B).
- the glass transition point is more than 25 ° C. Or a glass containing no side chain as described in the elastomeric polymer (A) and the elastomeric polymer (B).
- a polymer having a transition point of 25 ° C. or lower can be appropriately used.
- the SP value of such a polymer (Z) is 9.0 or more, preferably 9.0 to 16.0, and more preferably 10.0 to 15.0. When such an SP value exceeds the upper limit, it tends to be poorly mixed with other resins, whereas when it is less than the lower limit, it tends to be poorly mixed with other resins.
- Examples of such a polymer having an SP value of 9.0 or more include ethylene-methyl acrylate copolymer resin (abbreviation: EMA, SP value: 9.1), polyamide 12 (abbreviation: PA12, SP value: 13).
- EMA ethylene-methyl acrylate copolymer resin
- PA12 polyamide 12
- the “SP value” refers to the solubility determined by the so-called Fedors method (for example, the method described on pages 147 to 154 of “Polym. Eng. Sci. Vol. 14, No. 2”).
- the value of the parameter (unit: cal / cm 3 ) is adopted (the SP value is described in pages VII519 to VII559 of the book “Polymer Handbook Third Edition” published in 1999). You can also adopt the value that is being used.)
- the value of “cohesive energy of each atom or atomic group at 25 ° C.” and the value of “molar molecular volume of each atom or atomic group at 25 ° C.” used for calculation of the so-called Fedors method are, for example, “Polym. Eng. Sci. Vol.14, No.2, "pages 147 to 154.
- the mass ratio of each polymer contained in the elastomer component is added to the SP value of each polymer contained in the elastomer component. (The content ratio with respect to the total amount ([mass of the polymer whose ratio is to be obtained] / [total amount of elastomer component])) is obtained, and then the obtained values are added (of the obtained values The value obtained by obtaining the sum) is adopted as the “SP value of the elastomer component”.
- the elastomer component is a mixture of the polymer (A1) and the polymer (A2)
- the elastomer component (elastomeric polymer (A) and / or (B)) in the composition is prepared by using the method for producing the thermoplastic elastomer composition of the present invention described later, the production thereof
- the SP value of the “elastomeric polymer (D) having a cyclic acid anhydride group in the side chain”, which is a component used in the above, can be regarded as the SP value of the elastomer component as it is.
- the elastomer component elastomeric polymer (A) and / or (B)
- an elastomeric polymer having a cyclic acid anhydride group in the side chain ( D) is used to form a side chain, but the amount of the raw material compound (crosslinking agent) used in the reaction is 100 parts by mass of an elastomeric polymer (D) having the cyclic acid anhydride group in the side chain.
- the ratio is 0.1 to 10 parts by mass with respect to the amount, and basically, since a very small amount of the raw material compound (reactant: cross-linking agent) is used in the reaction for forming a cross-linked structure, In the resulting polymer, the polarity does not change significantly, and the SP value of the polymer is not expected to change before and after the reaction. It is considered that the SP value of the mer polymer (D) can be regarded as almost the same as the SP value.
- the elastomeric polymer having a cyclic acid anhydride group in the side chain before crosslinking is used as the SP value of the elastomer component.
- the SP value of “(D)” is adopted.
- the “SP value of the elastomeric polymer (D) having a cyclic acid anhydride group in the side chain” is the polymer (D ) Obtained by multiplying the SP value of each polymer contained as the polymer (D) by the mass ratio (content ratio relative to the total amount) of each polymer contained as the polymer (D), and then adding the obtained values (obtained) To obtain the sum of the obtained values).
- the SP value can be obtained even when the elastomeric polymer (D) is a mixture of a plurality of types of polymers by multiplying the SP value of each component by the mass ratio of the corresponding component and adding together. it can. Further, when the polymer (Z) is a mixture, the “SP value of the polymer (Z)” is also the same as the SP value of each polymer included as the polymer (Z). Each value obtained by multiplying the polymer mass ratio (content ratio with respect to the total amount) is obtained, and then the value obtained by adding the obtained values (obtaining the sum of the obtained values) is adopted.
- the polymer (Z) according to the present invention has a value larger than the SP value of the elastomer component by 0.5 or more (more preferably 1.0 to 8.0, still more preferably 2.0 to 7.0). Has SP value.
- the difference in SP value [SP value of polymer (Z)] ⁇ [SP value of polymer contained as elastomer component]
- the degree of increase in polarity is too low and oil resistance Cannot be improved sufficiently.
- the value of the difference between the SP values exceeds the upper limit, the polarity is too different and tends to cause poor mixing.
- the SP value of the polymer (Z) is the above condition (the condition that the SP value is 9.0 or more, and the SP A polymer to be used may be appropriately selected from polymers having an SP value of 9.0 or more so as to satisfy a condition that the value is 0.5 or more larger than the SP value of the elastomer component. And it becomes possible by using the polymer (Z) which satisfy
- the polymer (Z) according to the present invention preferably has a reactive functional group for the elastomer component.
- the term “reactive functional group” as used herein refers to a group that can be chemically bonded to the main chain or side chain of the elastomer component or a group that can improve compatibility by interaction such as hydrogen bonding.
- Such a reactive functional group is preferably at least one of a hydroxyl group, an amino group, an imino group, an ester group, an acid anhydride group, and a carboxy group, and is a hydroxyl group, an amino group, an imino group, or an acid anhydride. More preferably, it is at least one of a physical group and a carboxy group.
- the polymer (Z) having such a reactive functional group for example, even when the polymer (Z) and the elastomer component are used such that the difference in SP value is 5.0 or more, the polymer Therefore, it is possible to maintain a sufficiently high compatibility state without largely separating, and to uniformly disperse and mix the components, and to obtain higher oil resistance.
- a polymer having such a reactive functional group and an SP value of 9.0 or more for example, a polyamide having a glass transition point of more than 25 ° C. and having an amine at the terminal (for example, nylon) (Polyamide 12 (PA12) etc.)).
- a hydrogen bond is formed by the amine (terminal amine) and a hydroxyl group, a carbonyl group, or the like contained in the side chain of the elastomer component so that it is stably present in a sufficiently compatible state.
- a monomer having an acid anhydride group is used during the production of the elastomer component, such an acid anhydride group is reacted in advance with the amine at the end of the polyimide. This makes it possible to sufficiently suppress the occurrence of macroscopic phase separation, and even a polymer having a significantly different SP value can be present in a more stable and highly compatible state. It becomes possible to disperse and mix each component sufficiently uniformly.
- the polymer (Z) is a polymer having a glass transition point of more than 25 ° C. from the viewpoint of allowing the polymer (Z) to exist more stably in a sufficiently compatible state.
- a polymer having at least one reactive functional group among a hydroxyl group, an amino group, an imino group, an ester group, an acid anhydride group, and a carboxy group can be suitably used.
- thermoplastic elastomer composition of the present invention contains the elastomer component, the organized clay, and the polymer (Z).
- thermoplastic elastomer composition of the present invention can have a sufficiently high tensile strength (tensile strength using 100% modulus and breaking strength as an index) and excellent oil resistance is not necessarily clear.
- the present inventors speculate as follows.
- the elastomer component is an elastomeric polymer containing a side chain having at least a hydrogen bonding cross-linking site (in the side chain, side chain (a); side chain (a ′) and side chain (b)). And a polymer containing at least one of the side chains (c)).
- the elastomeric polymer and an organized clay are combined, the organized clay is efficiently peeled in the system to form a single-layered clay. By forming a clay in a single layer state in this way, the clay is more uniformly and highly dispersed in the polymer.
- the clay highly dispersed in the system interacts with hydrogen-bonding cross-linked sites (new hydrogen bonds are formed, etc.), and the elastomer component is cross-linked using the surface of the clay. Is done.
- surface cross-linking it becomes possible to suppress stress concentration at the cross-linking point, and higher rupture strength (tensile strength until rupture) than when no organic clay is contained. ) Can be expressed.
- organic clay is used as in the present invention, the abundance of clay in a single layer is made higher than that of normal clay (non-organic).
- the polymer (Z) satisfying the SP value as described above is contained.
- the compatibility with the low polarity oil can be reduced, and the oil resistance can be sufficiently improved.
- thermoplastic elastomer is a type that uses pseudo-crosslinking by physical interaction between polymer molecular chains (physical interaction is caused by interaction between polymer molecules).
- a type in which a weak bond is formed There are two types: a type in which a weak bond is formed) and a type in which rubber is dispersed in a thermoplastic resin matrix.
- thermoplastic elastomers using pseudo-crosslinking include polymers having soft segments and hard segments such as block polymers and urethane elastomers.
- a filler such as clay
- a thermoplastic elastomer of a type utilizing pseudo-crosslinking an interaction at the pseudo-crosslinking point (polymer The physical interaction between the molecular chains) is hindered by the clay, and the mechanical strength of the polymer is lowered, making it unusable for actual use as a rubber product.
- the conventional thermoplastic elastomer consisting only of the thermoplastic elastomer of the type utilizing pseudo-crosslinking is not the pseudo-crosslinking in the composition when this is simply combined with the organoclay. Formation is inhibited, and the mechanical strength (tensile stress, etc.) of the composition is lowered.
- fillers such as clay are introduced only into the matrix phase.
- a matrix made of a thermoplastic resin having no side chain no interaction with clay is formed in the matrix.
- thermoplastic elastomer of a type in which rubber is dispersed in a thermoplastic resin matrix when a polymer containing no side chain is used as a hydrogen bonding cross-linked site, even if clay is simply introduced, Clay cannot be sufficiently dispersed, and the mechanical strength (breaking strength, etc.) of the composition is lowered.
- the content of the organized clay is 20 parts by mass or less with respect to 100 parts by mass of the elastomer component. Even with such a content ratio (sufficiently low ratio), a sufficiently high effect can be obtained in tensile stress (tensile strength).
- the organoclay is sufficiently uniformly dispersed in the composition so that the surface cross-linking can be sufficiently formed, and it is more efficient due to being organicated. It is possible to make the clay well in a single layer state, and to make the proportion of clay dispersed in the single layer more efficient and advanced, which can form more surface crosslinks in the elastomer. Therefore, the present inventors speculate that even if the content is as small as 20 parts by mass or less, a sufficiently high tensile stress can be exhibited.
- the side chain containing the covalent crosslinking site is more The present inventors speculate that it is possible to develop a high level of compression set resistance. Further, in the case where a hydrogen bonding crosslinking site and a covalent bonding crosslinking site are present in the elastomer component (when the elastomeric polymer (B) is contained, a mixture of the elastomeric polymer (B) and another elastomeric polymer is added.
- the elastomeric polymer having a side chain (b) other than the elastomeric polymer (A) and the elastomeric polymer (B) In the case of using a mixture of a hydrogen bond and a covalent bond site, a higher mechanical strength due to the covalent bond and a heating due to the hydrogen bond due to the presence of the hydrogen bond crosslink site and the covalent bond site. Higher fluidity (formability) can be developed at the same time by cleaving. Therefore, the present inventors speculate that it is possible to appropriately change the composition according to the type of the side chain and to appropriately exhibit the characteristics according to the application.
- the elastomeric polymer having a side chain (b) other than the elastomeric polymer (B) as described above is obtained by using an elastomeric polymer having a functional group (for example, a cyclic acid anhydride group) in the side chain.
- a functional group for example, a cyclic acid anhydride group
- reacting a functional polymer with a compound that reacts with the functional group to form a covalently cross-linked site (compound that generates a covalent bond) to produce the elastomeric polymer having the side chain (b) It is possible to obtain.
- the above-mentioned “compound that forms a covalent crosslinking site (compound that generates a covalent bond)” is used as the compound that forms a covalent crosslinking site (a compound that generates a covalent bond). can do.
- thermoplastic elastomer composition of the present invention As described above, the reason why the above-described effects of the present invention can be obtained by the thermoplastic elastomer composition of the present invention has been examined. Preferred embodiments of the thermoplastic elastomer composition of the present invention (containing each component) The preferred conditions for the ratio and the like will be further described.
- the thermoplastic elastomer composition of the present invention contains the elastomer component, the organized clay, and the polymer (Z), and the content of the organized clay is 100 parts by mass of the elastomer component. On the other hand, it is 20 parts by mass or less. When the content of such an organized clay exceeds the upper limit, heat resistance and breaking strength are lowered.
- the content of the organized clay in such a thermoplastic elastomer composition is more preferably 0.1 to 10 parts by mass, and 0.5 to 5 parts by mass with respect to 100 parts by mass of the elastomer component. More preferred is 1 to 3 parts by mass.
- the content of the organized clay is less than the lower limit, the content of the organized clay tends to be too small to obtain a sufficient effect, whereas if the upper limit is exceeded, the crosslinking becomes too strong, On the other hand, elongation and strength are lowered, and it tends to be difficult to use for various purposes (practicality is lowered).
- such an organized clay is preferably present in the composition as a single layer form of clay (single layer clay). Presence of such a single-layered clay can be confirmed by measuring the surface of the composition with a transmission electron microscope (TEM).
- TEM transmission electron microscope
- thermoplastic elastomer composition of the present invention measurement points having a size of 5.63 ⁇ m 2 above any three points on the surface of the thermoplastic elastomer composition were measured by a transmission electron microscope (TEM).
- TEM transmission electron microscope
- 50% or more (more preferably 70% or more, more preferably 80 to 100%, particularly preferably 85 to 100%) of the total organoclay is a single layer based on the number at all measurement points. It is preferable to exist as clay. If the abundance of the single-layer clay is less than the lower limit, the elongation at break and the strength at break tend to decrease.
- thermoplastic elastomer In measuring the abundance (ratio) of such a single-layer clay, the thermoplastic elastomer was used as a sample using a transmission electron microscope (for example, trade name “JEM-2010” manufactured by JEOL Ltd.). 10 g of the composition was prepared, and three or more measurement points having a size of 5.63 ⁇ m 2 on the surface of the thermoplastic elastomer composition were measured. In each TEM image obtained by such measurement, a single layer of clay was measured. Obtain the number and the number of multilayered organic clays, and calculate the abundance (ratio) of single-layered clay among all the clays for each measurement point (each TEM image) based on the number. Can be obtained.
- a transmission electron microscope for example, trade name “JEM-2010” manufactured by JEOL Ltd.
- the interlayer distance of a general organic clay is about 20 to 40 angstroms (2 to 4 nm) (Note that the interlayer distance of montmorillonite before organic formation is Usually it is about 9.8 angstroms).
- the interlayer distance is 50 angstroms (> 5 nm) or more, so the interlayer distance of each layer that can be confirmed by a TEM image is Based on the fact that the distance is larger than the interlayer distance, it may be determined as a single layer.
- the layer may be determined that the layer is a single layer when there is an interval of 5 nm or more, and depending on the case, the layer may be several tens of nm or more. You may judge that it is a single layer state with a space
- the clay when a single layer of clay is contained in the composition in the above-described proportion (existence ratio), the clay is more dispersed and contained than the multilayered organic clay is dispersed as it is. Therefore, it becomes possible to disperse the clay in the composition with higher dispersibility (because the multilayered organized clay is decomposed to form a single-layer clay).
- the organoclay has higher dispersibility when the monolayer is present in the above ratio than the multi-layered composition in the composition, and the heat resistance and breaking strength are improved. It can be more advanced. Therefore, it is more preferable to contain the clay in a single layer at the ratio as described above, and this makes it possible to more efficiently improve the heat resistance and breaking strength by dispersing the organized clay. .
- the method of containing the single layer of clay in the above-mentioned proportion (existence) is not particularly limited, but the method for producing the thermoplastic elastomer composition of the present invention described later is adopted to provide the thermoplastic elastomer composition. It becomes possible to contain a single layer of clay at the above ratio more efficiently.
- thermoplastic elastomer composition of the present invention when measuring a measuring point of size of 5.63 ⁇ m 2 of any three or more points on the surface of the thermoplastic elastomer composition with a transmission electron microscope, it is preferable that 1 to 100 (more preferably 3 to 80, still more preferably 5 to 50) monolayer clay is dispersed per 1 ⁇ m 2 at all measurement points. If the number of such single-layer clays is less than the lower limit, the amount of clay is too small and sufficient effects tend not to be obtained. The number of single-layer clays can be determined by confirming a TEM image in the same manner as the measurement of the abundance (ratio) of single-layer clay.
- the content (content ratio) of the polymer (Z) is preferably 10 to 700 parts by mass, and 30 to 600 parts by mass with respect to 100 parts by mass of the elastomer component. More preferred is 50 to 500 parts by weight, still more preferred is 80 to 400 parts by weight, and most preferred is 100 to 300 parts by weight. If the content of such a polymer (Z) is less than the lower limit, it tends to be difficult to sufficiently improve the oil resistance. On the other hand, if the content exceeds the upper limit, compression set tends to increase.
- the content of the polymer (Z) is preferably 5 to 60% by mass, and preferably 8 to 50% by mass with respect to the total amount of the thermoplastic elastomer composition. More preferred is 10 to 40% by mass. If the content of such a polymer (Z) is less than the lower limit, it tends to be difficult to sufficiently improve oil resistance. On the other hand, if the content exceeds the upper limit, compression set will increase. There is a tendency.
- thermoplastic elastomer composition of this invention the characteristic according to a use can also be provided suitably according to the kind of elastomer component to be used.
- a thermoplastic elastomer composition comprising an elastomeric polymer (A) as an elastomer component, since the properties derived from the side chain (a) can be imparted to the composition, the elongation at break, strength at break, and fluidity are particularly improved. It becomes possible to make it.
- thermoplastic elastomer composition which uses an elastomeric polymer (B) as an elastomer component, since the characteristic derived from the covalently crosslinked site in the side chain can be imparted to the composition, it is particularly resistant to compression set. (Compression set resistance) can be improved.
- thermoplastic elastomer composition containing the elastomeric polymer (B) as an elastomer component
- the hydrogen bond crosslinking site side chain (a The properties derived from the hydrogen-bonding cross-linking sites described in ') can also be imparted, so that it is possible to further improve compression set resistance while maintaining fluidity (formability), and its side chain
- the type of the polymer, the type of the polymer (B), etc. it becomes possible to more efficiently exhibit the desired characteristics according to the application.
- thermoplastic elastomer composition of the present invention a thermoplastic elastomer composition containing the elastomeric polymer (A) as an elastomer component and a thermoplastic elastomer composition containing the elastomeric polymer (B) as an elastomer component, respectively.
- thermoplastic elastomer composition which mixes this and contains the elastomeric polymers (A) and (B) as an elastomer component.
- the elastomer component only needs to contain at least the elastomeric polymers (A) and (B).
- the covalent bond can be made more efficiently by providing a covalent cross-linking site in the composition.
- elastomeric polymers having side chains (b) other than the elastomeric polymer (B) may be used in combination.
- an elastomeric polymer (A) is used as the elastomer component
- another elastomeric polymer having a side chain (b) other than the elastomeric polymer (B) is used in combination
- Providing substantially the same characteristics as the thermoplastic elastomer composition using the elastomeric polymer (B) containing a hydrogen bonding crosslinking site and a covalent bonding crosslinking site in the side chain derived from the side chain contained Is also possible.
- thermoplastic elastomer composition containing elastomeric polymers (A) and (B) as an elastomer component when manufacturing the thermoplastic elastomer composition containing elastomeric polymers (A) and (B) as an elastomer component, side chains (b) other than the elastomeric polymer (A) and the elastomeric polymer (B) are used.
- thermoplastic elastomer composition containing other elastomeric polymer the ratio of each component (for example, each component of the elastomeric polymer (A) and the elastomeric polymer (B)) is appropriately changed. It is also possible to exhibit desired characteristics as appropriate.
- the content ratio of the elastomeric polymer (A) and the elastomeric polymer (B) is mass.
- the ratio ([polymer (A)]: [polymer (B)]) is preferably 1: 9 to 9: 1, more preferably 2: 8 to 8: 2. If the content ratio of such a polymer (A) is less than the lower limit, the fluidity (moldability) and mechanical strength tend to be insufficient. On the other hand, if the content ratio exceeds the upper limit, the resistance to compression set tends to decrease. It is in.
- thermoplastic elastomer composition of the present invention contains the elastomeric polymer (A) as an elastomer component, and the other elastomeric polymer having a side chain (b) other than the elastomeric polymer (B) as another polymer.
- elastomeric polymer (C) the content ratio of the elastomeric polymer (A) to the elastomeric polymer (C) is a mass ratio ([elastomer polymer A)]: [elastomeric polymer (C)]) is preferably 1: 9 to 9: 1, more preferably 2: 8 to 8: 2.
- the content ratio of such a polymer (A) is less than the lower limit, the fluidity (moldability) and mechanical strength tend to be insufficient. On the other hand, if the content ratio exceeds the upper limit, the resistance to compression set tends to decrease. It is in.
- the total amount of the side chain (a ′) and the side chain (b) is preferably 1: 9 to 9: 1, more preferably 2: 8 to 8: 2, based on the mass ratio. If the total amount of such side chains (a ′) is less than the lower limit, the fluidity (formability) and mechanical strength tend to be insufficient. On the other hand, if the upper limit is exceeded, the resistance to compression set is reduced. There is a tendency.
- Such a side chain (a ′) is a concept including the side chain (a). Therefore, even when only the side chain (a) is contained as the side chain (a ′), both the side chain (a) and the side chain (b) are present in the composition at the above-described mass ratio. Is preferred.
- thermoplastic elastomer composition of the present invention may be a polymer component other than the elastomer component and the polymer (Z) (hereinafter simply referred to as “other polymer”) as long as it does not impair the purpose of the present invention.
- Paraffin oil Paraffin oil, reinforcing agent (filler), hydrogen bonding reinforcing agent (filler), filler formed by introducing amino groups (hereinafter simply referred to as “amino group-introduced filler”), An amino group-containing compound other than the amino group-introduced filler, a compound containing a metal element (hereinafter simply referred to as “metal salt”), a maleic anhydride-modified polymer, an anti-aging agent, an antioxidant, a pigment (dye), Plasticizers other than paraffin oil, thixotropic agents, UV absorbers, flame retardants, solvents, surfactants (including leveling agents), dispersants, dehydrating agents, rust inhibitors, adhesion promoters, antistatic agents, fillers Such It can contain various additives.
- amino group-introduced filler An amino group-containing compound other than the amino group-introduced filler, a compound containing a metal element (hereinafter simply referred to as “metal
- Such additives are not particularly limited, and commonly used ones (known ones) can be appropriately used.
- the other polymer paraffin oil, reinforcing agent, anti-aging agent, antioxidant, pigment (dye), plasticizer and the like, the following can be appropriately used.
- Examples of the other polymer include an elastomeric polymer (B) and another elastomeric polymer having a side chain (b) other than the polymer (Z); ⁇ -olefin-based resins having no chemical crosslinkable sites other than the polymer (Z) can be preferably used.
- the “chemically-bonded cross-linking site” here refers to a site where a cross-link is formed by a chemical bond such as a hydrogen bond or a covalent bond. Therefore, “having no chemically-bonded cross-linking site” in the present invention refers to a state having no cross-link formed by a chemical bond (for example, hydrogen bond, covalent bond, etc.).
- ⁇ -olefin resin having no chemically bonding cross-linking site other than the polymer (Z) (hereinafter simply referred to as “ ⁇ -olefin resin having no chemical bonding cross-linking site”).
- ⁇ -olefin resin having no chemical bonding cross-linking site Does not contain a functional group (for example, hydroxyl group, carbonyl group, carboxyl group, thiol group, amide group, amino group) that forms a crosslinking point by a chemical bond, and is a bond that directly crosslinks polymer chains.
- Those which do not contain a site are preferably used.
- the ⁇ -olefin-based resin having no chemically-bonded cross-linking site includes at least the side chain (a), the side chain (a ′), the side chain (b), the side chain ( c) The polymer does not have.
- ⁇ -olefin-based resin here refers to an ⁇ -olefin homopolymer and an ⁇ -olefin copolymer.
- ⁇ -olefin refers to an alkene having a carbon-carbon double bond at the ⁇ -position (an alkene having a carbon-carbon double bond at the end: such an alkene may be linear. It may be branched, and preferably has 2 to 20 carbon atoms (more preferably 2 to 10), for example, ethylene, propylene, 1-butene, 1-pentene, 1 -Hexene, 1-heptene, 1-octene, 1-nonene, 1-decene and the like.
- ⁇ -olefin resins having no chemically-bonded cross-linking sites include ⁇ -olefin polymers (poly ⁇ -olefin: single weight) whose SP value does not satisfy the conditions for the polymer (Z). And may be a copolymer or a copolymer), and is not particularly limited.
- polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-butene copolymer, propylene-ethylene-butene A copolymer etc. are mentioned.
- ⁇ -olefin resins having no chemically-bonded crosslinking site polypropylene, polyethylene, and ethylene-propylene copolymer are preferable from the viewpoint of compatibility with the base elastomer.
- ⁇ -olefin-based resins having no chemically bonding cross-linking sites may be used alone or in combination of two or more.
- the ⁇ -olefin resin having no chemically-bonded cross-linking site preferably has a crystallinity of 10% or more, more preferably 10 to 80%, and more preferably 10 to 75%. Further preferred. If the degree of crystallinity is less than the lower limit, the resin-like properties become dilute, so it tends to be difficult to make the mechanical properties and fluidity more advanced. Therefore, it tends to be difficult to exhibit mechanical properties in a balanced manner at a higher level.
- Such crystallinity is measured by using an X-ray diffractometer (for example, trade name “MiniFlex300” manufactured by Rigaku Corporation) as a measuring device, measuring a diffraction peak, and integrating a scattering peak derived from crystallinity / amorphous. It can be determined by calculating the ratio.
- an X-ray diffractometer for example, trade name “MiniFlex300” manufactured by Rigaku Corporation
- melt flow rate is preferably 40 g / 10 min or more. If such a melt flow rate (MFR) is less than the lower limit, it tends to be difficult to improve the fluidity even if blended in the composition.
- melt flow rate is a value measured in accordance with method B described in JIS K6922-2 (issued in 2010), and is a product manufactured by Toyo Seiki Seisakusho as a melt flow rate measuring device.
- the weight average molecular weight (Mw) of the ⁇ -olefin-based resin having no chemically-bonded crosslinking site is preferably 10,000 or more and 2,000,000 or less, more preferably 30,000 or more and 1,500,000 or less. Preferably, it is 50,000 or more and 1.25 million or less.
- Mw weight average molecular weight
- the weight average molecular weight is less than the lower limit, the mechanical strength tends to decrease.
- the weight average molecular weight exceeds the upper limit, the compatibility with the elastomer component decreases and the phase tends to be separated.
- the number average molecular weight (Mn) of the ⁇ -olefin resin having no chemically-bonded crosslinking site is preferably 10,000 or more and 2,000,000 or less, more preferably 30,000 or more and 1,500,000 or less. Preferably, it is 50,000 or more and 1.25 million or less. If the number average molecular weight is less than the lower limit, the mechanical strength tends to decrease. On the other hand, if the number average molecular weight exceeds the upper limit, the compatibility with the elastomer component decreases, and phase separation tends to occur.
- the dispersity (Mw / Mn) of the molecular weight distribution of the ⁇ -olefin resin having no chemical bonding crosslinking site is preferably 100 or less, and more preferably 1.5 to 50. If the degree of dispersion (Mw / Mn) of the molecular weight distribution is less than the lower limit, the fluidity tends to decrease. On the other hand, if it exceeds the upper limit, the compatibility with the elastomer component tends to decrease.
- the weight-average molecular weight (Mw), the number-average molecular weight (Mn), and the molecular weight distribution dispersity (Mw / Mn) of the ⁇ -olefin resin as described above are determined by a so-called gel permeation chromatography (GPC) method. Can be sought. Moreover, as a specific apparatus and conditions for measuring such molecular weight, “Prominence GPC system” manufactured by Shimadzu Corporation can be used.
- the glass transition point of the ⁇ -olefin-based resin having no chemical bonding cross-linking site is preferably ⁇ 150 to 5 ° C., more preferably ⁇ 125 to 0 ° C. If such a glass transition point is less than the lower limit, the melting point becomes low and the heat resistance tends to be lowered.
- the “glass transition point” here is a glass transition point measured by differential scanning calorimetry (DSC-Differential Scanning Calorimetry) as described above. In such DSC measurement, the rate of temperature rise is preferably 10 ° C./min.
- the method for producing such an ⁇ -olefin-based resin having no chemically-bonded crosslinking site is not particularly limited, and a known method can be appropriately employed.
- ⁇ -olefin resin commercially available products may be used.
- trade names “Tafmer” manufactured by Mitsui Chemicals, Inc . trade names “Novatech HD”, “Novatech LD” Novatec LL, “Kernel”
- thermoplastic elastomer composition of the present invention further contains an ⁇ -olefin resin having no chemically-bonded crosslinking site
- the inclusion of the ⁇ -olefin resin not having the chemically-bonded crosslinking site is preferably 800 parts by mass or less, more preferably 5 to 700 parts by mass, and still more preferably 10 to 600 parts by mass with respect to 100 parts by mass of the elastomer component.
- the amount is particularly preferably 25 to 500 parts by mass, and most preferably 50 to 400 parts by mass. If the content of the ⁇ -olefin resin not having such a chemical bonding cross-linking site is less than the lower limit, the fluidity tends to decrease. On the other hand, if the content exceeds the upper limit, the compression set decreases. There is a tendency.
- thermoplastic elastomer composition of the present invention further contains an ⁇ -olefin-based resin having no chemically-bonded crosslinking site, the ⁇ -olefin-based resin not having the chemically-bonded crosslinking site.
- the content of is preferably 1 to 90% by mass, more preferably 3 to 80% by mass, and still more preferably 5 to 70% by mass with respect to the total amount of the composition. If the content of the ⁇ -olefin resin not having such a chemical bonding cross-linking site is less than the lower limit, the fluidity tends to decrease. On the other hand, if the content exceeds the upper limit, the compression set decreases. There is a tendency.
- the other polymer is a component that does not interfere with the cross-linking reaction of the base elastomer
- a styrene block copolymer having no chemically-bonding cross-linking site other than the polymer (Z). Is preferred.
- a styrene block copolymer when used, it basically does not interfere with the cross-linking structure of the base elastomeric polymer (the elastomer component) or the cross-linking reaction at the time of manufacture.
- thermoplastic elastomer composition of the present invention Since the inherent physical properties of the structure are not hindered, excellent mechanical properties (particularly tensile properties, compression set, etc.) derived from the styrene block copolymer can be obtained while sufficiently maintaining the properties derived from the elastomer component.
- the present inventors speculate that it can be reflected (provided) in the thermoplastic elastomer composition of the present invention and can have higher properties.
- the styrene block copolymer which is a component suitably used in the thermoplastic elastomer composition of the present invention, has an SP value that does not satisfy the conditions of the polymer (Z), and has a chemical bonding property. It does not have a crosslinking site.
- “having no chemically-bonded cross-linking site” has the same meaning as described for the ⁇ -olefin resin.
- a functional group for example, a hydroxyl group, a carbonyl group, a carboxyl group, a thiol group, an amide group, or the like, which forms a crosslinking point by a chemical bond
- a binding site such as a cross-linking site by a covalent bond
- such a styrene block copolymer having no chemically bonding cross-linking site other than the polymer (Z) has at least the side chain (a), side chain (a ′), side chain ( b) A polymer having no side chain (c) or the like.
- styrene block copolymer herein may be a polymer having a styrene block structure at any part.
- a styrene block copolymer has a styrene block structure, and at normal temperature, the styrene block structure part aggregates to form a physical crosslinking point (physical pseudo-crosslinking point) and is heated. Based on the fact that such a physical pseudo-crosslinking point collapses, it can be used as a material having thermoplasticity and rubber-like properties (elasticity, etc.) at room temperature.
- styrene block copolymer having no chemically bonding cross-linking site other than such a polymer (Z) (hereinafter, sometimes simply referred to as “styrene block copolymer having no chemical bonding cross-linking site”)
- SIS styrene-isoprene-styrene block copolymer
- SEPS styrene-ethylene-propylene-styrene block copolymer
- SEEPS styrene-ethylene-ethylene- Propylene-styrene block copolymer
- SBS styrene-butadiene-styrene block copolymer
- SEBS styrene-ethylene-butylene-styrene block copolymer
- SIBS styrene-isoprene-butadiene-styrene block copolymer
- the styrene block copolymer having no chemically-bonded cross-linking site is a styrene block copolymer having a styrene content of 20 to 40% by mass (more preferably 25 to 37% by mass). preferable. If the styrene content is less than the lower limit, the thermoplasticity tends to decrease due to a decrease in the styrene block component. On the other hand, if the styrene content exceeds the upper limit, the rubber elasticity tends to decrease due to a decrease in the olefin component.
- the styrene content in such a styrene block styrene block copolymer can be measured by a method based on the IR method described in JIS K6239 (issued in 2007).
- the weight average molecular weight (Mw) of the styrene block copolymer having no chemically-bonded crosslinking site is preferably 200,000 to 700,000, more preferably 300,000 to 600,000. Preferably, it is 350,000 or more and 550,000 or less.
- Mw weight average molecular weight
- the weight average molecular weight is less than the lower limit, the heat resistance tends to be lowered.
- the weight average molecular weight exceeds the upper limit, the compatibility with the elastomeric polymer tends to be lowered.
- the number average molecular weight (Mn) of the styrene block copolymer having no chemically-bonded crosslinking site is preferably 100,000 or more and 600,000 or less, more preferably 150,000 or more and 550,000 or less. Preferably, it is 200,000 or more and 500,000 or less.
- Mn number average molecular weight
- the heat resistance tends to be lowered.
- the upper limit is exceeded, the compatibility with the elastomeric polymer (the elastomer component) tends to be lowered.
- the dispersity (Mw / Mn) of the molecular weight distribution of the styrene block copolymer having no chemically bonding cross-linked site is preferably 5 or less, more preferably 1 to 3.
- the weight average molecular weight (Mw), the number average molecular weight (Mn), and the molecular weight distribution dispersity (Mw / Mn) can be determined by a so-called gel permeation chromatography (GPC) method. Further, as a specific apparatus and conditions for measuring such molecular weight, “Prominence GPC system” manufactured by Shimadzu Corporation can be used.
- the glass transition point of the styrene block copolymer having no chemically bonding cross-linking site is preferably ⁇ 80 to ⁇ 40 ° C., and more preferably ⁇ 70 to ⁇ 50.
- the melting point becomes low, and thus the heat resistance tends to be lowered.
- the upper limit is exceeded, rubber elasticity tends to be lowered.
- the “glass transition point” here is a glass transition point measured by differential scanning calorimetry (DSC-Differential Scanning Calorimetry) as described above. In such DSC measurement, the rate of temperature rise is preferably 10 ° C./min.
- the method for producing the styrene block copolymer having no chemical bonding cross-linking site is not particularly limited, and a known method can be appropriately employed. Moreover, as such a styrene block copolymer, you may use a commercial item, for example, the brand name "G1633" "G1640" “G1641” “G1642” “G1643” “G1645" “G1650” by a Kraton company.
- thermoplastic elastomer composition of the present invention further contains a styrene block copolymer having no chemically-bonded crosslinking site
- the styrene block copolymer having no chemically-bonded crosslinking site is used.
- the content (content ratio) is preferably 10 to 400 parts by mass or less, more preferably 15 to 350 parts by mass, and more preferably 20 to 300 parts by mass with respect to 100 parts by mass of the elastomer component. More preferred is 30 to 250 parts by mass.
- the content of the styrene block copolymer having no such chemical bonding crosslinking site is less than the lower limit, the content of the styrene block copolymer having no chemical bonding crosslinking site is too small, In particular, there is a tendency that sufficient effects cannot be obtained in terms of fluidity and workability.
- the upper limit is exceeded, the characteristics of the matrix structure (characteristics derived from the elastomer component) due to the crosslinked elastomer tend to be dilute. It is in.
- thermoplastic elastomer composition of the present invention further contains a styrene block copolymer having no chemically-bonded crosslinking site
- the styrene block copolymer having no chemically-bonded crosslinking site is used.
- the content is preferably 5 to 60% by mass, more preferably 7 to 45% by mass, and still more preferably 10 to 30% by mass with respect to the total amount of the thermoplastic elastomer composition. If the content of the styrene block copolymer having no such chemically bondable crosslinking site is less than the lower limit, the content of the styrene block copolymer is too small, particularly in terms of fluidity and workability. On the other hand, if the upper limit is exceeded, the characteristics of the matrix structure (characteristics derived from the elastomer component) due to the crosslinked elastomer tend to be diluted.
- thermoplastic elastomer composition of the present invention examples include, for example, an ⁇ -olefin-based resin that does not have the chemical bond cross-linking site and the chemical bond cross-linking site.
- examples of the other polymer described above include, for example, an ⁇ -olefin-based resin that does not have the chemical bond cross-linking site and the chemical bond cross-linking site.
- other types of polymers whose SP values do not satisfy the conditions for the polymer (Z) can be used as appropriate.
- PTFE polytetrafluoroethylene
- polyisobutylene polymethyl methacrylate, polystearyl methacrylate, polybutyl methacrylate, polypropyl methacrylate, fluorine rubber, silicone rubber ( MQ), polypropylene oxide, polydimethylsiloxane, butyl rubber (IIR), polyvinyl chloride, natural rubber (NR), polyisoprene (IR: isoprene rubber), polybutadiene (BR: butadiene rubber), styrene butadiene rubber (SBR), polystyrene Is mentioned.
- PTFE polytetrafluoroethylene
- polyisobutylene polymethyl methacrylate
- polystearyl methacrylate polybutyl methacrylate
- polypropyl methacrylate fluorine rubber
- silicone rubber MQ
- polypropylene oxide polydimethylsiloxane
- butyl rubber I
- paraffin oil can be further added to the thermoplastic elastomer composition of the present invention (other components) from the viewpoint that the fluidity can be further improved without deteriorating various physical properties of the composition.
- Component: Additive can be suitably used.
- paraffin oil is used in combination with the above-mentioned styrenic block polymer, it becomes possible to absorb the oil component into the block polymer, improving the workability by adding oil (improving fluidity) and styrenic It is possible to achieve a sufficiently high level of improvement in mechanical properties due to the addition of block polymers, so that production properties such as extrusion and injection moldability are maintained while maintaining sufficient mechanical properties and heat resistance. Can be more advanced.
- paraffin oil when used, for example, when heated and extruded from an orifice (for example, one having an opening with a diameter of 1 mm), the string-like thermoplastic extruded from the orifice opening
- the shape (strand shape) of the elastomer composition has a sufficiently uniform thickness, and excellent extrudability tends to be obtained such that no fuzz is observed on the surface thereof.
- paraffin oil is not particularly limited, and known paraffin oil can be appropriately used.
- paraffin oil a correlation ring analysis (ndM ring analysis) based on ASTM D3238-85 is performed on the oil, and the percentage of the paraffin carbon number to the total carbon number (paraffin) Parts: C P ), percentage of total number of naphthene carbons (naphthene part: C N ), and percentage of total number of aromatic carbons (aromatic part: C A ), respectively. It is preferable that the percentage (C P ) of the paraffin carbon number to the total carbon number is 60% or more.
- such a paraffin oil is measured according to JIS K 2283 (published in 2000), it preferably has 50mm 2 / s ⁇ 700mm 2 / s kinematic viscosity at 40 °C, 150 ⁇ 600mm 2 / S is more preferable, and 300 to 500 mm 2 / s is even more preferable. If such a kinematic viscosity ( ⁇ ) is less than the lower limit, oil bleeding tends to occur. On the other hand, if it exceeds the upper limit, sufficient fluidity tends not to be imparted. As the kinematic viscosity of such paraffin oil, a value measured according to JIS K 2283 (issued in 2000) under a temperature condition of 40 ° C. is adopted.
- JIS K 2283 (issued in 2000) The value automatically measured under a temperature condition of 40 ° C. using a Canon-Fenske viscometer (for example, trade name “SO Series” manufactured by Shibata Kagaku Co., Ltd.) may be employed.
- Canon-Fenske viscometer for example, trade name “SO Series” manufactured by Shibata Kagaku Co., Ltd.
- such a paraffin oil preferably has an aniline point measured by a U-tube method according to JIS K2256 (issued in 2013) of 80 ° C. to 145 ° C., more preferably 100 to 145 ° C. Preferably, the temperature is 105 to 145 ° C.
- a value measured by the U-shaped tube method conforming to JIS K2256 is adopted.
- the aniline point conforming to JIS K2256 (issued in 2013) is adopted.
- a value measured using a measuring device for example, trade name “aap-6” manufactured by Tanaka Scientific Instruments Co., Ltd. may be used.
- paraffin oil a commercially available thing can be used suitably, for example, the brand name "Super oil M series P200" by JX Nippon Mining & Energy Corporation (new company name “JXTG Energy Co., Ltd.”).
- Super Oil M Series P400 Super Oil M Series P500S
- the content of the paraffin oil is preferably 10 to 600 parts by mass with respect to 100 parts by mass of the elastomer component.
- the amount is more preferably 550 parts by mass, still more preferably 75 to 500 parts by mass, and particularly preferably 100 to 400 parts by mass. If the content of such paraffin oil is less than the lower limit, the content of paraffin oil is too small, and the effect obtained by adding paraffin oil (especially the effect of improving fluidity and workability) is not always sufficient. On the other hand, when the upper limit is exceeded, bleeding of paraffin oil tends to be induced.
- the content of the paraffin oil is preferably 20 to 60% by mass with respect to the total amount of the thermoplastic elastomer composition, 25 More preferably, it is -55 mass%, and still more preferably 35-55 mass%. If the content of such paraffin oil is less than the above lower limit, the content of paraffin oil is too small, and in particular, there is a tendency that sufficient effects cannot be obtained in terms of fluidity and workability, while exceeding the upper limit In this case, paraffin oil bleed tends to be induced.
- thermoplastic elastomer composition of the present invention includes an ⁇ -olefin resin not having the chemical bonding cross-linking site, the paraffin oil, and the chemical bonding cross-linking from the viewpoint of improving fluidity and mechanical properties.
- part in combination is preferable. That is, as the thermoplastic elastomer composition of the present invention, the elastomer component, the organized clay, the polymer (Z), the ⁇ -olefin resin having no chemically-bonded crosslinking site, the paraffin oil, and the Those containing a styrene block copolymer having no chemically-bonded crosslinking site are more preferred.
- the styrene block copolymer and the ⁇ -olefin resin are highly compatible, they are uniformly dispersed in the system. Further, in such a system containing the styrene block copolymer and the ⁇ -olefin resin, the elastomer component has high compatibility with both, so that the elastomer component is also sufficiently contained in the composition. It will be uniformly dispersed. As described above, since the elastomer component and the organized clay interact to form surface cross-linking, the clay is also present in a sufficiently dispersed state as the elastomer component is dispersed.
- each component is contained in a sufficiently dispersed state. . Therefore, the state of the elastomer component that strongly influences the properties of the thermoplastic elastomer composition is sufficiently dispersed in a state of interacting with the organoclay (a state in which a strong bond is formed by surface cross-linking). Therefore, higher mechanical strength and heat resistance can be exhibited in a balanced manner. Further, in such a system, as described above, the elastomer component and the organized clay are sufficiently contained in the system because they interact with the organized clay (a strong bond is formed by cross-linking).
- the polymer (Z) that strongly influences the oil resistance of the thermoplastic elastomer composition is also sufficiently dispersed with the dispersion of the elastomer component. Therefore, it has higher oil resistance. Further, in such a system, higher fluidity (fluidity during heating) can be achieved due to the ⁇ -olefin resin. Furthermore, since the mechanical strength of the styrene block copolymer can be adjusted depending on the amount added, it can also be adjusted to desired mechanical properties.
- the present inventors speculate that the effect of being able to exhibit characteristics such as distortion in a balanced manner at a higher level is obtained.
- examples of the reinforcing agent (filler) that can be further contained in the thermoplastic elastomer composition of the present invention include carbon black, silica, calcium carbonate, and the like.
- silica wet silica is preferably used.
- antioxidant for example, compounds such as hindered phenols, aliphatic and aromatic hindered amines can be appropriately used.
- antioxidant butylhydroxytoluene (BHT), butylhydroxyanisole (BHA) etc.
- BHT butylhydroxytoluene
- BHA butylhydroxyanisole
- the pigment include inorganic pigments such as titanium dioxide, zinc oxide, ultramarine, bengara, lithopone, lead, cadmium, iron, cobalt, aluminum, hydrochloride, and sulfate, organic pigments such as azo pigments and copper phthalocyanine pigments.
- Pigments can be used as appropriate, and examples of the plasticizer include benzoic acid, phthalic acid, trimellitic acid, pyromellitic acid, adipic acid, sebacic acid, fumaric acid, maleic acid, itaconic acid, citric acid. In addition to derivatives such as acids, polyesters, polyethers, epoxy resins, and the like can be used as appropriate. Further, as the plasticizer (softener), those that can be used for thermoplastic elastomers can be appropriately used from the viewpoint of further improving fluidity, and for example, oils can also be used. In addition, as such an additive etc., you may utilize suitably what is illustrated by Unexamined-Japanese-Patent No. 2006-131663.
- the thermoplastic elastomer composition of the present invention includes the elastomer component, the organoclay, the polymer (Z), the ⁇ -olefin resin not having the chemically-bonded crosslinking site, the paraffin oil, and the chemical.
- the content of the other components is not particularly limited,
- the amount is preferably 400 parts by mass or less, more preferably 20 to 300 parts by mass with respect to 100 parts by mass of the elastomer component.
- the effect of using the other components tends to be insufficiently expressed.
- the content exceeds the upper limit, it depends on the type of the component used. The effect of the substrate elastomer is diminished and the physical properties tend to decrease.
- the content of the other components is 100 parts by mass of the elastomer component, respectively.
- the amount is preferably 20 parts by mass or less, more preferably 0.1 to 10 parts by mass. If the content of such other components is less than the lower limit, the effect of using the other components tends to be insufficient, while if the upper limit is exceeded, the reaction of the substrate elastomer is adversely affected. On the other hand, physical properties tend to decrease.
- thermoplastic elastomer composition of the present invention is heated (for example, heated to 100 to 250 ° C.) to form hydrogen bonds formed at the hydrogen bond cross-linked sites and other cross-linked structures (including a styrene block copolymer).
- the physical cross-linking and the like can be dissociated and softened to impart fluidity. This is presumably because the interaction between the side chains formed between the molecules or within the molecule due to heating (mainly the interaction due to hydrogen bonding) is weakened.
- the side chain contains an elastomer component containing at least a hydrogen-bonding cross-linked site, etc.
- the dissociated hydrogen bond Since they are bonded and cured again, depending on the composition, the thermoplastic elastomer composition can be made to exhibit recyclability more efficiently.
- the thermoplastic elastomer composition of the present invention has a melt flow rate (MFR) at 230 ° C. under a load of 10 kg measured in accordance with JIS K6922-2 (issued in 2010) of 2 g / 10 min or more. Preferably, it is 4 g / 10 min or more, and more preferably 8 g / 10 min or more. If such a melt flow rate (MFR) is less than the lower limit, there may be a case where sufficient processability cannot always be exhibited.
- MFR melt flow rate
- Such a melt flow rate (MFR) is a value measured in accordance with method B described in JIS K6922-2 (issued in 2010), and is a product manufactured by Toyo Seiki Seisakusho as a melt flow rate measuring device.
- thermoplastic elastomer composition 3 g was added to the furnace of the apparatus, and the temperature was maintained at 230 ° C. for 5 minutes, and then maintained at 230 ° C. and loaded to 10 kg.
- the mass (g) of the elastomer flowing out in 10 minutes from the opening of a cylindrical orifice member having a diameter of 1 mm and a length of 8 mm connected to the lower part of the furnace body is measured (the furnace body The temperature is maintained at 230 ° C. for 5 minutes and then the load is started, and then the measurement of the mass of the elastomer flowing out is started. Kill.
- the 5% weight loss temperature is preferably 320 ° C. or higher, more preferably 325 ° C. or higher.
- a 5% weight loss temperature is prepared by preparing 10 mg of a thermoplastic elastomer composition as a measurement sample, and using a thermogravimetric measurement device (TGA) as a measurement device and heating at a heating rate of 10 ° C./min. It can be determined by measuring the temperature when the 5% weight is reduced from the initial weight (10 mg).
- TGA thermogravimetric measurement device
- thermoplastic elastomer composition of the present invention can be used for various rubber applications by utilizing rubber elasticity, for example. Moreover, since it can improve heat resistance and recyclability, it is preferable to use it as a hot melt adhesive or as an additive contained therein.
- the thermoplastic elastomer composition of the present invention includes automotive rubber parts, hoses, belts, sheets, anti-vibration rubbers, rollers, linings, rubberized cloths, sealing materials, gloves, fenders, medical rubbers (syringe gaskets, tubes). , Catheters), gaskets (for home appliances, construction), asphalt modifiers, hot melt adhesives, boots, grips, toys, shoes, sandals, keypads, gears, PET bottle cap liners, etc. Used.
- the rubber parts for automobiles include, for example, tire treads, carcass, sidewalls, inner liners, undertreads, belt portions, and other tire parts; exterior radiator grilles, side moldings, garnishes (pillars, rears) , Cowl top), aero parts (air dam, spoiler), wheel cover, weather strip, cow belt grill, air outlet louver, air scoop, hood bulge, vent parts, anti-corrosion parts (over fender, side seal panel, Malls (windows, hoods, door belts)), marks, etc .; interior window frame parts such as doors, lights, wiper weatherstrips, glass runs, glass run channels; air duct hoses, radiator hoses, brake hoses; cranks Lubricating oil system parts such as shaft seal, valve stem seal, head cover gasket, A / T oil cooler hose, mission oil seal, P / S hose, P / S oil seal; fuel hose, emission control hose, inlet filler hose, diaphragms Anti-vi
- a rubber modifier for example, as a flow preventive agent, when it is included in a resin or rubber that causes a cold flow at room temperature, it is possible to prevent a flow during extrusion or a cold flow.
- thermoplastic elastomer composition of the present invention can have higher heat resistance and can have higher tensile properties based on the breaking strength.
- thermoplastic elastomer composition it is possible to appropriately exhibit characteristics (for example, characteristics such as self-healing properties) required according to applications by appropriately changing the composition. In this way, by appropriately changing the composition, it is possible to appropriately exhibit the necessary characteristics in a balanced manner according to the use of the thermoplastic elastomer composition.
- characteristics required according to the application it is preferable to appropriately change the type (composition) of the components in the composition.
- thermoplastic elastomer composition of the present invention has been described above.
- thermoplastic resin of the present invention that can be suitably used as a method for producing such a thermoplastic elastomer composition of the present invention.
- a method for producing the elastomer composition will be described.
- thermoplastic elastomer composition comprises an elastomeric polymer (D) having a cyclic acid anhydride group in the side chain; Organized clay, A polymer (Z) having an SP value of 9.0 or more and a SP value of 0.5 or more larger than the SP value of the elastomeric polymer (D); A first step of mixing to obtain a mixture; Compound (I) that reacts with the cyclic acid anhydride group to form a hydrogen-bonding cross-linking site in the mixture, and a covalent bond cross-linking site that reacts with the compound (I) and the cyclic acid anhydride group 0.1 to 10 parts by mass of 100 parts by mass of the elastomeric polymer (D) having at least one cyclic acid anhydride group in the side chain of at least one raw material compound among the mixed raw materials of the compound (II) forming A second step of obtaining a thermoplastic
- At least one elastomer component Organized clay having a content ratio of 20 parts by mass or less with respect to 100 parts by mass of the elastomer component, A polymer other than the elastomeric polymers (A) and (B), having an SP value of 9.0 or more and a SP value of 0.5 or more larger than the SP value of the elastomer component ( Z) And a composition comprising
- the first step using the organized clay at a ratio such that the content of the organized clay in the thermoplastic elastomer composition is 20 parts by mass or less with respect to 100 parts by mass of the elastomer component,
- the elastomeric polymer (D), the organoclay, and the polymer (Z) are mixed.
- the first step and the second step will be described separately.
- the first step is a step of obtaining a mixture by mixing an elastomeric polymer (D) having a cyclic acid anhydride group in the side chain, the organoclay, and the polymer (Z).
- the “elastomeric polymer (D) having a cyclic acid anhydride group in the side chain” means that the cyclic acid anhydride group has a chemically stable bond (covalent bond) to an atom forming the main chain of the polymer.
- a polymer capable of forming the main chain portion of the elastomeric polymers (A) to (B) and a compound capable of introducing a cyclic acid anhydride group. What is obtained by making it react can be used suitably.
- the glass transition point consists of a polymer below room temperature (25 degreeC). Any material may be used as long as it is made of a so-called elastomer, and is not particularly limited.
- Examples of the polymer capable of forming the main chain portion of such elastomeric polymers (A) to (B) include natural rubber (NR), isoprene rubber (IR), butadiene rubber (BR), 1, 2-butadiene rubber, styrene-butadiene rubber (SBR), acrylonitrile-butadiene rubber (NBR), chloroprene rubber (CR), butyl rubber (IIR), ethylene-propylene-diene rubber (EPDM) and other diene rubbers and their hydrogenation Olefin rubbers such as ethylene-propylene rubber (EPM), ethylene-acrylic rubber (AEM), ethylene-butene rubber (EBM), chlorosulfonated polyethylene, acrylic rubber, fluororubber, polyethylene rubber, polypropylene rubber; epichlorohydride Rubber; polysulfide rubber; Examples include ricone rubber; urethane rubber;
- the polymer capable of forming the main chain portion of the elastomeric polymers (A) to (B) may be an elastomeric polymer containing a resin component, for example, hydrogenated.
- a resin component for example, hydrogenated.
- Polystyrene-based elastomeric polymer for example, SBS, SIS, SEBS, etc.
- polyolefin-based elastomeric polymer for example, SBS, SIS, SEBS, etc.
- polyvinyl chloride-based elastomeric polymer polyurethane-based elastomeric polymer
- polyester-based elastomeric polymer polyamide-based elastomeric polymer Etc.
- polymers capable of forming the main chain portion of such elastomeric polymers (A) to (B) include diene rubber, hydrogenated diene rubber, olefin rubber, and hydrogenated. At least one selected from polystyrene-based elastomeric polymer, polyolefin-based elastomeric polymer, polyvinyl chloride-based elastomeric polymer, polyurethane-based elastomeric polymer, polyester-based elastomeric polymer, and polyamide-based elastomeric polymer It preferably consists of seeds.
- a diene rubber is preferable from the viewpoint of easy introduction of a maleic anhydride group suitable as a cyclic acid anhydride group, and an olefin rubber is preferable from the viewpoint of aging resistance. preferable.
- Examples of the compound into which the cyclic acid anhydride group can be introduced include cyclic acid anhydrides such as succinic anhydride, maleic anhydride, glutaric anhydride, phthalic anhydride, and derivatives thereof.
- cyclic acid anhydride group of the elastomeric polymer having a cyclic acid anhydride group in the side chain used in the first step succinic anhydride group, maleic anhydride group, glutaric anhydride group, phthalic anhydride group Among them, a maleic anhydride group is more preferable from the viewpoint of high reactivity of the raw material and industrial availability of the raw material.
- the elastomeric polymer having a cyclic acid anhydride group in the side chain used in the first step can form the main chain portion of the elastomeric polymer (A) to (B), for example, by a usual method.
- a polymer may be produced by a method in which a cyclic acid anhydride is graft-polymerized under the usual conditions, for example, stirring under heating.
- Examples of commercially available elastomeric polymers having such a cyclic acid anhydride group in the side chain include maleic anhydride-modified isoprene rubbers such as LIR-403 (manufactured by Kuraray Co., Ltd.) and LIR-410A (prototype manufactured by Kuraray Co., Ltd.).
- Modified isoprene rubber such as LIR-410 (manufactured by Kuraray Co., Ltd.); carboxy-modified nitrile rubber such as Clinac 110, 221 and 231 (manufactured by Policer); CPIB (manufactured by Nisseki Chemical Co., Ltd.) Carboxy-modified polybutene such as Nucrel (made by Mitsui Dupont Polychemical), Yucaron (made by Mitsubishi Chemical), Tuffmer M (for example, MP0610 (made by Mitsui Chemicals), MP0620 (made by Mitsui Chemicals)), etc.
- LIR-410 manufactured by Kuraray Co., Ltd.
- carboxy-modified nitrile rubber such as Clinac 110, 221 and 231 (manufactured by Policer); CPIB (manufactured by Nisseki Chemical Co., Ltd.)
- Carboxy-modified polybutene such as Nucrel (made by Mitsui Dupont Poly
- the elastomeric polymer having a cyclic acid anhydride group in the side chain is preferably a maleic anhydride-modified elastomeric polymer, and from the viewpoint of high molecular weight and high strength, maleic anhydride-modified ethylene.
- -Propylene rubber, maleic anhydride-modified ethylene-butene rubber, and ethylene / methyl acrylate / maleic anhydride copolymer are more preferable.
- an elastomeric polymer which has the said cyclic acid anhydride group in a side chain you may utilize 1 type individually or in combination of 2 or more types.
- the organized clay used in the first step is the same as the organized clay described in the thermoplastic elastomer composition of the present invention (the preferred one is also the same).
- the polymer (Z) used in the first step has a SP value of 9.0 or more and a SP value that is 0.5 or more larger than the SP value of the elastomeric polymer (D). It is. Moreover, as such a polymer (Z), it is necessary to use polymers other than the elastomeric polymers (A) and (B).
- the elastomer component (elastomeric polymer) in the thermoplastic elastomer composition which is the final product (target product) is obtained by reacting the elastomeric polymer (D) with a raw material compound described later. (A) and / or (B)) are formed, and the main chain portion of the elastomeric polymer (D) becomes the main chain portion of the polymer contained as the elastomer component as it is.
- the amount of the elastomeric polymer (D) is 100 parts by mass.
- the raw material compound (crosslinking agent) is used at a ratio of 0.1 to 10 parts by mass, the amount of the raw material compound (reactant: crosslinking agent) is basically small, and the side chain formed has a large effect on the SP value. (Basically, the SP value does not change even if the side chain is formed), so that the polymer (elastomer polymer (A) and / or (B The SP value of)) is considered to be basically the same as the SP value of the “elastomeric polymer (D) having a cyclic acid anhydride group in the side chain”. An error having a cyclic acid anhydride group in the side chain Adopting SP value of Tomah polymer (D) "as the SP value of the elastomer component.
- the SP value of the “elastomeric polymer (D) having a cyclic acid anhydride group in the side chain” is determined as described above, and the polymer (D) is used as a mixture of a plurality of types of polymers. However, since the raw material compound (reactant: cross-linking agent) used basically for forming the side chain is small, the SP value of the resulting elastomer component (becomes a mixture of polymers) is formed. Since the chain does not have a great influence, the SP value is maintained, and the SP value of the formed elastomer component is almost equal to the SP value of the “elastomeric polymer (D) having a cyclic acid anhydride group in the side chain”.
- the SP value of the “elastomeric polymer (D) having a cyclic acid anhydride group in the side chain” before crosslinking is adopted as the SP value of the elastomer component because it is considered that the same value is obtained. Therefore, such a polymer (Z) has an SP value of 9.0 or more in the final product and is selected from the group consisting of the elastomer components (elastomeric polymers (A) and (B)).
- the SP value is 0.5 or more larger than the SP value of at least one kind. Therefore, the polymer (Z) used in the first step is the same as the polymer (Z) described in the thermoplastic elastomer composition of the present invention (the preferred conditions are also the same), and the elastomer.
- the above conditions (the condition that the SP value is 9.0 or more, and the SP value is 0.5 or more than the SP value of the elastomeric polymer (D))
- An appropriate polymer may be appropriately selected and used from the polymers other than the elastomeric polymers (A) and (B) so as to satisfy a condition that a large value is satisfied.
- an elastomeric polymer (D) having a cyclic acid anhydride group in the side chain, the organoclay, and the polymer (Z) are mixed to obtain a mixture.
- the addition order of the elastomeric polymer (D) having a cyclic acid anhydride group in the side chain, the organoclay, and the polymer (Z) is not particularly limited.
- the elastomeric polymer (D) having a cyclic acid anhydride group in the side chain was plasticized in advance so that the organic clay was sufficiently dispersed. It is preferable to add organic clay later, and it is more preferable to plasticize the mixture precursor and add organic clay there.
- the method for plasticizing the elastomeric polymer (D) having a cyclic acid anhydride group in the side chain or the mixture precursor is not particularly limited, and for example, these can be plasticized.
- a method of kneading using a roll, a kneader, an extruder, a universal stirrer or the like at a suitable temperature (for example, about 100 to 250 ° C.) can be appropriately employed.
- Conditions such as temperature at the time of plasticizing the elastomeric polymer (D) having such a cyclic acid anhydride group in the side chain and the mixture precursor are not particularly limited, and the types of components (for example, What is necessary is just to set suitably according to the kind etc. of the elastomeric polymer (D) which has a cyclic acid anhydride group in a side chain.
- the content of the organized clay in the thermoplastic elastomer composition finally obtained is 20 parts by mass or less (more preferably, 0.1 parts by mass with respect to 100 parts by mass of the elastomer component). 1 to 10 parts by mass, more preferably 0.5 to 5 parts by mass, particularly preferably 1 to 3 parts by mass) using the organized clay, and the cyclic acid anhydride group in the side chain. It is preferable to mix the elastomeric polymer (D) having the organic clay and the polymer (Z).
- the content of the organic clay exceeds the upper limit, the crosslinking is too strong, and the elongation and strength tend to decrease.On the other hand, if the content is less than the lower limit, the amount of the organic clay is too small and the organic There exists a tendency for the effect acquired by using a chlorinated clay to fall.
- the content of the organized clay in such a mixture is preferably 20 parts by mass or less with respect to 100 parts by mass of the elastomeric polymer (D) having a cyclic acid anhydride group in the side chain. More preferably, it is 5 to 5 parts by mass, and further preferably 1 to 3 parts by mass.
- the content is less than the lower limit, the amount of the organic clay is too small, and the effect obtained by using the organic clay tends to be reduced.
- the upper limit is exceeded, crosslinking occurs. It is too strong and tends to decrease the elongation and strength.
- content of the organized clay in the thermoplastic elastomer composition finally obtained becomes a value within the said range by using organized clay with such content.
- the amount of the organized clay used in the formation of such a mixture is as follows. It is preferable that the modified clay is contained at a ratio of 0.01 g to 2.0 g (more preferably 0.02 to 1.0 g). If the ratio of the organoclay to the acid anhydride group is less than the lower limit, the effect tends to be too low. On the other hand, if the upper limit is exceeded, the crosslinking is too strong, and the elongation and strength are reduced. Tend to. In addition, by containing the organized clay within such a range, the organized clay contained in the mixture is efficiently decomposed, and a single-layer clay can be efficiently produced. The dispersibility tends to be higher.
- the content of the polymer (Z) in the finally obtained thermoplastic elastomer composition is 10 to 700 parts by mass (more preferably, 100 parts by mass of the elastomer component). 30 to 600 parts by mass, more preferably 50 to 500 parts by mass, particularly preferably 80 to 400 parts by mass, and most preferably 100 to 300 parts by mass). It is preferable to mix the elastomeric polymer (D) having a cyclic acid anhydride group in the side chain, the clay and the polymer (Z). If the content of such a polymer (Z) exceeds the upper limit, compression set tends to increase. On the other hand, if the content is less than the lower limit, it tends to be difficult to sufficiently improve oil resistance. .
- the content of the polymer (Z) in such a mixture is 10 to 700 parts by mass (more preferably, 100 parts by mass of the elastomeric polymer (D) having a cyclic acid anhydride group in the side chain. 30 to 600 parts by mass, more preferably 50 to 500 parts by mass, particularly preferably 80 to 400 parts by mass, and most preferably 100 to 300 parts by mass). If such a content is less than the lower limit, it tends to be difficult to sufficiently improve oil resistance. On the other hand, if the content exceeds the upper limit, compression set tends to increase.
- the mixing method for obtaining such a mixture is not particularly limited, and a known method or the like can be appropriately employed.
- a method of mixing with a roll, a kneader, an extruder, a universal stirrer, or the like is employed. be able to.
- such a mixture further includes an ⁇ -olefin-based resin, paraffin oil, and the polymer that do not have a chemically bonding cross-linking site other than the polymer (Z).
- Such an ⁇ -olefin resin not having a chemical bonding crosslinking site, paraffin oil, and a styrene block copolymer having no chemical bonding crosslinking site are the thermoplastic elastomer composition of the present invention, respectively.
- An elastomeric polymer (D) having a cyclic acid anhydride group in the side chain, an organoclay, the polymer (Z), an ⁇ -olefin resin and / or paraffin having no chemically-bonded cross-linking site The order of addition of oil and / or additive components such as a styrene block copolymer that does not have a chemically-bonded crosslinking site is not particularly limited, but the viewpoint of further improving the dispersibility of the organoclay
- the content of the ⁇ -olefin resin is 100 masses of the elastomer component.
- the amount is preferably 800 parts by mass or less (more preferably 5 to 700 parts by mass, further preferably 10 to 600 parts by mass, particularly preferably 25 to 500 parts by mass, most preferably 50 to 400 parts by mass) with respect to parts. .
- the content of such an ⁇ -olefin resin exceeds the upper limit, mechanical properties (breaking strength, compression set) tend to be lowered.
- the content is less than the lower limit, fluidity tends to be lowered.
- the content of the ⁇ -olefin resin in such a mixture is 800 parts by mass or less (more preferably) with respect to 100 parts by mass of the elastomeric polymer (D) having a cyclic acid anhydride group in the side chain. 5 to 700 parts by mass, more preferably 10 to 600 parts by mass, particularly preferably 25 to 500 parts by mass, and most preferably 35 to 400 parts by mass). If such a content is less than the lower limit, mechanical properties (breaking strength, compression set) tend to decrease, and if it is less than the lower limit, fluidity tends to decrease.
- the paraffin oil content is preferably 600 parts by mass or less, more preferably 10 to 600 parts by mass with respect to 100 parts by mass of the elastomer component. 50 to 550 parts by mass, further preferably 75 to 500 parts by mass, and most preferably 100 to 400 parts by mass.
- the styrene block copolymer having no chemically-bonded crosslinking site is contained in the mixture, it is preferably 600 parts by mass or less with respect to 100 parts by mass of the elastomer component. More preferred is 15 to 550 parts by weight, still more preferred is 20 to 500 parts by weight, and most preferred is 30 to 400 parts by weight.
- the elastomer component, the polymer (Z), and the ⁇ -olefin-based polymer are used in a range that does not impair the object of the present invention, depending on the use of the thermoplastic elastomer composition finally obtained.
- polymer other than resin and styrene block copolymer, reinforcing agent (filler), filler formed by introducing an amino group hereinafter simply referred to as “amino group-introduced filler”
- amino group-introduced filler other than the amino group-introduced filler
- metal salts compounds containing metal elements
- maleic anhydride-modified polymers hereinafter simply referred to as “metal salts”
- maleic anhydride-modified polymers hereinafter simply referred to as “metal salts”
- antioxidants antioxidants, antioxidants, pigments (dyes), plasticizers, thixotropic agents
- Other components such as various additives such as ultraviolet absorbers, flame retardants, solvents,
- thermoplastic elastomer composition Including It can be.
- additives and the like are not particularly limited, and those commonly used can be appropriately used.
- thermoplastic-elastomer composition of the said invention can be utilized suitably.
- the content of such other components is preferably 500 parts by mass or less with respect to 100 parts by mass of the elastomer component when the other components are polymers and reinforcing materials (fillers). More preferred is 20 to 400 parts by mass. If the content of such other components is less than the lower limit, the effect of using the other components tends to be insufficiently expressed. On the other hand, if the content exceeds the upper limit, it depends on the type of the component used. The effect of the substrate elastomer is diminished and the physical properties tend to decrease.
- the content of the other component is 20 with respect to 100 parts by mass of the elastomer component.
- the amount is preferably not more than part by mass, more preferably 0.1 to 10 parts by mass. If the content of such other components is less than the lower limit, the effect of using the other components tends to be insufficient, while if the upper limit is exceeded, the reaction of the substrate elastomer is adversely affected. On the other hand, physical properties tend to decrease.
- the mixture reacts with the cyclic acid anhydride group to form a hydrogen-bonding cross-linking site, and reacts with the compound (I) and the cyclic acid anhydride group.
- At least one raw material compound among the mixed raw materials of the compound (II) that forms a covalently cross-linked site is 0 with respect to 100 parts by mass of the elastomeric polymer (D) having the cyclic acid anhydride group in the side chain.
- This is a step of adding a 1 to 10 parts by mass and reacting the polymer and the raw material compound to obtain a thermoplastic elastomer composition.
- the compound (I) that forms a hydrogen bonding cross-linking site by reacting with the cyclic acid anhydride group a compound that forms the hydrogen bonding cross-linking site described in the thermoplastic elastomer composition of the present invention (nitrogen-containing complex).
- nitrogen-containing complex a compound that forms the hydrogen bonding cross-linking site described in the thermoplastic elastomer composition of the present invention (nitrogen-containing complex).
- the same compounds as the compound capable of introducing a ring) can be suitably used.
- the nitrogen-containing heterocyclic ring described in the thermoplastic elastomer composition of the present invention may be used, or the nitrogen-containing compound may be used.
- a substituent for example, a hydroxyl group, a thiol group, an amino group, etc.
- a cyclic acid anhydride group such as maleic anhydride
- it is possible to introduce a compound that forms both a hydrogen bonding crosslinking site and a covalent bonding site both hydrogen bonding crosslinking site and covalent bonding site can be introduced simultaneously).
- a side chain having both a hydrogen bonding crosslinking site and a covalent bonding site can be said to be a preferred form of a side chain having a hydrogen bonding crosslinking site).
- the compound (I) is not particularly limited, and the compound as described above depending on the type of side chain (side chain (a) or side chain (a ′)) in the target polymer.
- a suitable compound can be appropriately selected from (I).
- a compound (I) from the viewpoint that higher reactivity is obtained, triazole, pyridine, which may have at least one substituent selected from a hydroxyl group, a thiol group, and an amino group, Preferred are thiadiazole, imidazole, isocyanurate, triazine and hydantoin, and 2,4-diamino-6-phenyl-1,3,5-triazine.
- Triazole Triazole, pyridine and thiadiazole having the above substituents Imidazole, isocyanurate, triazine and hydantoin, and 2,4-diamino-6-phenyl-1,3,5-triazine, more preferably triazole, isocyanurate and triazine having the above substituents And 2,4-diamino-6-phenyl- , More preferably 3,5-triazines, triazoles having the substituent group are particularly preferred.
- Examples of the triazole, pyridine, thiadiazole, imidazole and hydantoin which may have such a substituent include, for example, 4H-3-amino-1,2,4-triazole, aminopyridine, aminoimidazole and aminotriazine. Aminoisocyanurate, hydroxypyridine, hydroxyethyl isocyanurate and the like.
- the “compound that forms a covalently crosslinked site” described in the thermoplastic elastomer composition of the present invention A compound similar to “a compound that generates a covalent bond” ”can be preferably used (the same is true for the compound).
- a compound that forms both a hydrogen bonding crosslinking site and a covalent bonding site both hydrogen bonding crosslinking site and covalent bonding site can be introduced simultaneously.
- a side chain having both a hydrogen bonding crosslinking site and a covalent crosslinking site can be said to be a preferred form of a side chain having a covalent crosslinking site).
- Such compounds (II) include trishydroxyethyl isocyanurate, sulfamide, pentaerythritol, 2,4-diamino-6-phenyl-1,3,5-triazine, polyether from the viewpoint of compression set resistance.
- Polyols are preferable, trishydroxyethyl isocyanurate and sulfamide are more preferable, and pentaerythritol, 2,4-diamino-6-phenyl-1,3,5-triazine, and trishydroxyethyl isocyanurate are more preferable.
- the compound (I) and / or (II) a compound having at least one substituent selected from a hydroxyl group, a thiol group, an amino group, and an imino group from the viewpoint of introducing a hydrogen-bonding crosslinking site. It is preferable to use it. Further, as the compound (I) and / or (II), it is possible to more efficiently introduce both a hydrogen-bonding crosslinking site and a covalent-bonding crosslinking site into the composition.
- a compound that reacts with an anhydride group to form both a hydrogen bonding crosslinking site and a covalent crosslinking site (compound capable of simultaneously introducing both a hydrogen bonding crosslinking site and a covalent crosslinking site) It is preferable to use it.
- the compound that forms both the hydrogen bond crosslinking site and the covalent bond site the heterocyclic ring-containing polyol, the heterocyclic ring-containing polyamine, and the heterocyclic ring-containing polythiol can be suitably used. 2,4-diamino-6-phenyl-1,3,5-triazine and trishydroxyethyl isocyanurate are particularly preferred.
- the amount of the starting compound (compound (I) and / or compound (II)) added (total amount of compound (I) and / or compound (II): when only one compound is used, The amount of the compound) is 0.1 to 10 parts by mass with respect to 100 parts by mass of the polymer (the elastomeric polymer having a cyclic acid anhydride group in the side chain) in the mixture, and 0.3 to The amount is more preferably 7 parts by mass, and further preferably 0.5 to 5.0 parts by mass. If the amount of compound (I) and compound (II) added (the amount based on parts by mass) is less than the lower limit, the crosslinking density does not increase and the desired physical properties tend not to be exhibited.
- the amount of the starting compound (compound (I) and / or compound (II)) added (total amount of compound (I) and / or compound (II): when only one compound is used,
- the amount of the compound is not particularly limited, but when the compound contains active hydrogen such as an amine or alcohol, the amine in the compound with respect to 100 mol% of the cyclic acid anhydride group,
- the amount of active hydrogen such as alcohol is preferably 20 to 250 mol%, more preferably 50 to 150 mol%, and still more preferably 80 to 120 mol%. If the amount added is less than the lower limit, the amount of side chains introduced is small, it is difficult to make the crosslinking density sufficiently high, and physical properties such as tensile strength tend to be reduced. On the other hand, when the above upper limit is exceeded, the amount of the compound used is too large, the number of branches increases, and the crosslinking density tends to decrease.
- the order of adding compound (I) and compound (II) is not particularly limited, and either may be added first.
- compound (I) is reacted with a part of the cyclic acid anhydride group of the elastomeric polymer having a cyclic acid anhydride group in the side chain. You may let them. Thereby, it is also possible to react the compound (II) with an unreacted cyclic acid anhydride group (a cyclic acid anhydride group that has not been reacted) to form a covalently crosslinked site.
- the part mentioned here is preferably 1 mol% or more and 50 mol% or less with respect to 100 mol% of the cyclic acid anhydride group.
- the effect of introducing a group derived from the compound (I) for example, a nitrogen-containing heterocyclic ring
- the compound (II) is preferably reacted with the cyclic acid anhydride group so that a suitable number of covalent crosslinks (for example, 1 to 3 per molecule) is obtained.
- the cyclic acid anhydride group of the polymer is opened, and the cyclic acid anhydride group and the raw material compound ( The compound (I) and / or compound (II)) is chemically bonded.
- the side chain formed (introduced) by such a reaction can contain the structure represented by the above formula (2) or (3).
- the side chain formed by such a reaction can also contain a structure represented by the above formulas (7) to (9).
- each group (structure) of the side chain in such a polymer that is, an unreacted cyclic acid anhydride group, a structure represented by the above formulas (2), (3) and (7) to (9) Etc. can be confirmed by commonly used analytical means such as NMR and IR spectra.
- an elastomeric polymer having a side chain (a) containing a hydrogen-bonding cross-linking site having a carbonyl-containing group and / or a nitrogen-containing heterocycle and having a glass transition point of 25 ° C. or lower (A) and at least one selected from the group consisting of an elastomeric polymer (B) containing a hydrogen-bonding cross-linking site and a covalent cross-linking site in the side chain and having a glass transition point of 25 ° C. or lower.
- a kind of elastomer component Organized clay having a content ratio of 20 parts by mass or less with respect to 100 parts by mass of the elastomer component, A polymer other than the elastomeric polymers (A) and (B), having an SP value of 9.0 or more and a SP value of 0.5 or more larger than the SP value of the elastomer component (Z ) And a composition containing the same.
- the elastomeric polymer (A) and the elastomeric polymer (B) in the thermoplastic elastomer composition thus obtained are the side chain (a), side chain (a ′), side chain ( b) and the side chain (c) each derived from a reaction with a cyclic acid anhydride group (for example, containing structures represented by the above formulas (2), (3) and (7) to (9)) Except for the side chain and the like, the elastomeric polymer (A) and the elastomeric polymer (B) described in the thermoplastic elastomer composition of the present invention are the same.
- the reaction between the elastomeric polymer (D) having a cyclic acid anhydride group in the side chain and the raw material compound is a reaction in which a side chain is formed, and basically has a large influence on the SP value before and after the reaction. It is obtained after the reaction from the fact that the main chain part to be exerted is the same, the amount of the raw material compound used for the formation of the side chain is small, and the side chain does not greatly affect the SP value.
- the SP value of the elastomer component (elastomeric polymer (A) and / or elastomeric polymer (B)) obtained is considered to be substantially the same as the SP value of the elastomeric polymer (D).
- the SP value of the “elastomeric polymer (D) having a cyclic acid anhydride group in the side chain” before cross-linking is determined from the elastomer component (elastomer polymer (A) and / or elastomer). Employing as the SP value of mer polymer (B)). Therefore, the conditions of “the SP value is 9.0 or more and the SP value is 0.5 or more larger than the SP value of the elastomeric polymer (D)” used in the first step are satisfied. In the final product, the polymer is a polymer that satisfies the condition that “the SP value is 9.0 or more and the SP value is 0.5 or more larger than the SP value of the elastomer component”. Become.
- the elastomeric polymer having the cyclic acid anhydride group in the side chain is a maleic anhydride-modified elastomeric polymer, and the raw material compound is ,
- a triazole optionally having at least one substituent selected from a hydroxyl group, a thiol group and an amino group, and a pyridine optionally having at least one substituent selected from a hydroxyl group, a thiol group and an amino group
- a thiadiazole optionally having at least one substituent selected from a hydroxyl group, a thiol group and an amino group
- an imidazole optionally having at least one substituent selected from a hydroxyl group, a thiol group and an amino group
- a hydroxyl group, a thiol group and an amino group which may have at least one substituent, isocyanurate, hydroxyl group, thiol group and Triazine optional
- the elastomeric polymer having the cyclic acid anhydride group in the side chain is a maleic anhydride-modified elastomeric polymer
- the elastomer component is a maleic anhydride-modified elastomeric polymer and at least one of a triazole, a hydroxyl group, a thiol group, and an amino group that may have at least one substituent selected from a hydroxyl group, a thiol group, and an amino group.
- isocyanurate hydroxyl group, thiol group and amino group optionally having at least one substituent selected from imidazole, hydroxyl group, thiol group and amino group optionally having one substituent group
- hydantoin trishydroxyethyl isocyanurate, sulfamide, pentaerythritol, 2,4-diamino-6-phenyl-1,3,5-triazine, which may have one substituent, and polyether polyol It is preferable that it is at least 1 sort (s) selected from the group which consists of a reaction material with at least 1 sort (s) of compound (the said raw material compound).
- thermoplastic elastomer composition is an elastomeric polymer (D) having a cyclic acid anhydride group in the side chain (hereinafter sometimes referred to as “acid anhydride-containing polymer”). Denatured and manufactured.
- the acid anhydride group and the organic clay interact, It becomes easy to peel off the layer of clay.
- an organized clay organized clay
- an organic substance such as an ammonium salt existing between layers interacts with an acid anhydride more efficiently, and thus the layer is more easily peeled off.
- the raw material compound which can function as a cross-linking agent that forms a cross-link.
- cross-linking agent is added to form a cross-linking agent and an acid anhydride group.
- thermoplastic elastomer composition obtained according to the present invention has the organoclay sufficiently dispersed, and the organoclay and the hydrogen-bonding cross-linking site interact to have a uniform surface cross-linking site.
- the polymer (Z) is contained together with the organoclay and the elastomer component in the resulting thermoplastic elastomer composition.
- thermoplastic elastomer composition can have sufficiently high oil resistance and tensile strength.
- thermoplastic elastomer composition obtained by the present invention can contain a single layer of clay in the composition.
- a measurement point having a size of 5.63 ⁇ m 2 above any three points on the surface of the thermoplastic elastomer composition is measured with a transmission electron microscope (TEM).
- TEM transmission electron microscope
- 50% or more (more preferably 70% or more, more preferably 80 to 100%, particularly preferably 85 to 100%) of the total organic clay based on the number at all measurement points. May exist as a single layer of clay. When the abundance of such a single layer of clay is less than the lower limit, the elongation at break and the strength at break tend to decrease.
- the proportion of clay in the form of a single layer (single-layer clay) in the thermoplastic elastomer composition is more efficiently set to the above-mentioned suitable proportion.
- the organoclay interacts with the cyclic acid anhydride group, making it possible to more efficiently peel the layers of the organoclay having a multilayer structure.
- the present inventors speculate that it is possible to contain a single layer of clay in a small proportion. Note that the presence of such a single-layered clay can be confirmed by measuring the surface of the obtained composition with a transmission electron microscope (TEM).
- TEM transmission electron microscope
- thermoplastic elastomer composition containing an elastomeric polymer (A) as an elastomer component and a thermoplastic elastomer composition containing an elastomeric polymer (B) as an elastomer component, respectively.
- thermoplastic elastomer composition containing the elastomeric polymers (A) and (B) as an elastomer component.
- thermoplastic elastomer composition containing a combination of elastomeric polymers (A) and (B) as an elastomer component
- the ratio of the elastomeric polymer (A) and the elastomeric polymer (B) is appropriately changed.
- desired characteristics can be exhibited by appropriately changing the ratio of the hydrogen-bonding cross-linking site and the covalent cross-linking site existing in the composition.
- thermoplastic elastomer composition thus obtained can be suitably used, for example, for various rubber applications by utilizing its rubber elasticity, for example, a hot melt adhesive or an additive contained therein, an automobile, Rubber parts, hoses, belts, sheets, anti-vibration rubber, rollers, linings, rubberized cloth, sealing materials, gloves, fenders, medical rubber (syringe gaskets, tubes, catheters), gaskets (for home appliances, construction) ), Asphalt modifiers, hot melt adhesives, boots, grips, toys, shoes, sandals, keypads, gears, plastic bottle cap liners, rubber parts for printers, sealing materials, paints / coating materials, printing It can be suitably used for applications such as ink.
- a hot melt adhesive or an additive contained therein an automobile, Rubber parts, hoses, belts, sheets, anti-vibration rubber, rollers, linings, rubberized cloth, sealing materials, gloves, fenders, medical rubber (syringe gaskets, tubes, catheters), gaskets (for
- thermoplastic elastomer composition of this invention which is a method suitably usable as a method for manufacturing the thermoplastic elastomer composition of this invention was demonstrated, the thermoplastic elastomer composition of this invention was demonstrated.
- the method for producing is not limited to the method for producing the thermoplastic elastomer composition of the present invention, and other methods may be appropriately employed.
- the elastomeric polymer (D), the polymer (Z), the raw material compound, and the organized clay are simultaneously added to form a mixture
- the elastomeric A method of obtaining a thermoplastic elastomer composition by reacting a polymer (D) with the raw material compound, forming a mixture of the elastomeric polymer (D), the polymer (Z), and the raw material compound, and the mixture A method of reacting the elastomeric polymer (D) with the raw material compound to form an elastomer component, and then adding an organized clay to the mixture containing the elastomer component may be appropriately employed.
- the elastomer molded body of the present invention is obtained by molding the thermoplastic elastomer composition of the present invention (molded product of the thermoplastic elastomer composition of the present invention).
- Such an elastomer molded body of the present invention may be formed by molding the thermoplastic elastomer composition of the present invention, and, for example, the thermoplastic elastomer composition of the present invention alone may be used depending on the application.
- the molded thermoplastic elastomer composition itself may be molded, or the thermoplastic elastomer composition of the present invention is molded so as to form a structure appropriately combined with other members ( Other members may be included).
- the elastomer molded body of the present invention is not particularly limited as long as it is formed by molding the thermoplastic elastomer composition of the present invention, and the shape and form are not particularly limited, and the structure includes other members. It may be a body. In addition, it does not restrict
- Examples of the shape of the elastomer molded body of the present invention include, for example, a sheet shape, a plate shape, a pipe shape, a tube shape, a columnar shape, an elliptical shape, a strand shape, a filament shape, a net shape, and a covering shape. (For example, when used for electric wire coating, the shape of the coating).
- the method for molding the thermoplastic elastomer composition of the present invention is not particularly limited, and known elastomer molding methods (for example, extrusion molding, injection molding, blow molding, injection blow molding, extrusion blow molding, inflation) Molding, stamping molding, compression molding, bead molding, etc.) can be employed as appropriate.
- thermoplastic elastomer composition of the present invention is introduced into a mold having a desired shape and heat-molded while being appropriately pressed.
- the elastomer molded body of the present invention can be obtained by molding the thermoplastic elastomer composition by appropriately adopting a known elastomer molding method.
- Such an elastomer molded body of the present invention is preferably a molded body for use in any application selected from the group consisting of civil engineering / building materials, industrial parts, electrical / electronic parts and daily necessities.
- the elastomer molded object of this invention is good also as a thing of the form suitably combined with the other member etc.
- these applications are not particularly limited, but include, for example, various civil engineering / architectural gaskets and sheets, gap filling.
- Materials for example, joint materials), building seal materials, pipe joint seal materials, building sash seal materials, piping protect materials, wiring protect materials, heat insulating materials, packing materials, cushioning materials, automobile parts (for example, the aforementioned automotive rubber) Parts, automotive interior / exterior parts, constant velocity joint boots, weather strips, dampers, wiper blades, insulation covers, hood seal rubber, body panels, side shields, packing materials (for automobiles, for example, packing for automobile engines), Parts for agricultural machinery, agricultural materials, conveyor belts, contact rubber sheets, electrical insulators, various types of electricity Equipment housing and internal parts, wire coverings, connectors, caps, plugs, sports and leisure equipment (swimming fins, underwater glasses, golf club grips, baseball bat grips, etc.), footwear (shoe soles, sandals, etc.), miscellaneous goods ( Packaging materials, garden hoses, anti-skid tapes for stairs, cleaning tools, cosmetics, etc.).
- automobile parts for example, the aforementioned automotive rubber
- Such an elastomer molded body of the present invention includes, among others, automobile parts, gap filling materials, building sealing materials, pipe joint sealing materials, piping protection materials, wiring protection materials, heat insulating materials, packing materials, cushioning materials, electrical insulation materials. More preferably, it is a molded body for use in one application selected from the group consisting of a body, a contact rubber sheet, sports / leisure goods and sundries.
- the elastomer molded body of the present invention is used for one application selected from the group consisting of packing for automobile engines, constant velocity joint boots, weather strips, dampers, wiper blades, insulating covers, and hood seal rubber. It is more preferable.
- thermoplastic elastomer composition obtained in each example and each comparative example First, a method for evaluating the characteristics of the thermoplastic elastomer composition obtained in each example and each comparative example will be described.
- thermoplastic elastomer composition sheets thickness 2 mm, length 150 mm, width 150 mm obtained in each example and each comparative example was used, and the JIS-A hardness was determined in accordance with JIS K6253 (issued in 2012). It was measured.
- T B breaking strength
- the degree of swelling of the thermoplastic elastomer composition obtained in each example and each comparative example with respect to hexane is the sheet of the thermoplastic elastomer composition obtained in each example and each comparative example (thickness 2 mm, length 150 mm). , 150 mm wide, respectively, to prepare test pieces each having a length of 40 mm, a width of 5 mm, and a thickness of 2 mm, and the volume of the test piece (the volume before swelling) was measured by a densitometer (trade name “SD” manufactured by Alpha Mirage Co. -200L ").
- thermoplastic elastomer composition sheets (thickness 2 mm, length 150 mm, width 150 mm) obtained in Examples 10 to 15 and Comparative Examples 3 to 8, respectively, test pieces having a width of 5 mm, a length of 20 mm, and a thickness of 2 mm And using a DMA measuring device (trade name “Rheogel-E4000” manufactured by UBM) so that distortion occurs in the longitudinal direction of the test piece (the direction of the side where the length of the test piece is 20 mm) during measurement. The test piece was installed in the apparatus, and the temperature was increased from 50 to 200 ° C.
- styrene block copolymer (styrene-ethylene-butylene-styrene block copolymer (SEBS): trade name “G1633U” manufactured by Clayton Co., Ltd., molecular weight: 400,000 to 500,000, styrene content: 30 mass%) 200 g
- SEBS styrene-ethylene-butylene-styrene block copolymer
- G1633U manufactured by Clayton Co., Ltd., molecular weight: 400,000 to 500,000, styrene content: 30 mass%)
- maleic anhydride-modified ethylene-butene copolymer maleinized EBM (MEBM): trade name “Tuffmer MH5040” manufactured by Mitsui Chemicals, Inc.
- crystallinity 4%, SP value: 8 0.0
- polyamide 12 trade name “UBESTA Polyamide 12” manufactured by Ube Industries, SP value: 13.0, SP value difference between polyamide 12 and MEBM (absolute value): 5.0
- EPM trade name “Tuffmer DF7350” manufactured by Mitsui Chemicals, Inc.
- crystallinity 10%, MFR: 35 g / 10 min (2.16 kg, 190 ° C.)
- Mw 100, 000, SP value: 7.9, difference in SP value between EPM and MEBM (absolute value): 0.1) 75 g
- anti-aging agent trade name “AO
- a first mixture (a mixture containing the maleated EBM and polyamide 12 (corresponding to the polymer (Z))).
- the first mixture was plasticized by the kneading step.
- organic clay trade name “Esven WX” manufactured by Hojun Co., Ltd., types of ammonium salt as an organic agent: dimethyl dioctadecyl ammonium and dimethyl
- 0.1 g of stearylbenzylammonium (a total of 2 types) was added and kneaded at 180 ° C. for 4 minutes to obtain a second mixture.
- side chain (i) A side chain containing a structure represented by the following formula (26) (hereinafter sometimes simply referred to as “side chain (i)”), a side chain containing a structure represented by the following formula (27) ( Hereinafter, in some cases, simply referred to as “side chain (ii)”) and a side chain containing a structure represented by the following formula (28) (hereinafter, sometimes simply referred to as “side chain (iii)”).
- An elastomeric polymer mainly having the side chain (iii) is formed (note that the side chain (i) to (iii) are stoichiometrically determined from the raw materials used). If considered, side chain (iii) is mainly formed It is clear that the side chain (i) and / or the side chain (ii) can be formed depending on the position of the side chain of the polymer, etc. Hereinafter, it is formed by reaction based on the raw materials used. In some cases, the type of the side chain that is considered to be the side chain (iii) is simply referred to as “the elastomeric polymer mainly having the side chain (iii)”.
- such an elastomeric polymer has a glass transition point of 25 ° C. or lower because the main chain is composed of an ethylene-butene copolymer (ethylene and butene). Further, such an elastomeric polymer can be regarded as having an SP value of 8.0 from the type of raw material used (maleic anhydride-modified ethylene-butene copolymer).
- thermoplastic elastomeric composition 42 g thus obtained was introduced into a sheet-forming mold (thickness 2 mm, length 150 mm, width 150 mm) heated at 200 ° C. (preheating) for 3 minutes, and was subjected to the conditions at 200 ° C.
- a sheet of the thermoplastic elastomer composition was obtained by pressurizing and molding at 16 MPa for 5 minutes and then cooling at 16 MPa for 2 minutes with a water-cooled press.
- the evaluation results of the properties of the thermoplastic elastomer composition thus obtained are shown in Table 1.
- Example 2 The amount of anti-aging agent (trade name “AO-50” manufactured by Adeka) was changed from 0.879 g to 0.979 g, and the polyamide 12 (trade name “UBESTA Polyamide 12” manufactured by Ube Industries, Ltd., SP) was used.
- a thermoplastic elastomer composition and a sheet thereof were obtained in the same manner as in Example 1, except that the value: 9.1) was changed from 100 g to 200 g.
- the evaluation results of the properties of the thermoplastic elastomer composition thus obtained are shown in Table 1.
- thermoplastic elastomer composition (Example 3) The amount of anti-aging agent (trade name “AO-50” manufactured by Adeka) was changed from 0.879 g to 1.079 g, and the polyamide 12 (trade name “UBESTA Polyamide 12” manufactured by Ube Industries, Ltd., SP) Value: 13.0) A thermoplastic elastomer composition and a sheet thereof were obtained in the same manner as in Example 1 except that the amount used was changed from 100 g to 300 g. The evaluation results of the properties of the thermoplastic elastomer composition thus obtained are shown in Table 1.
- Example 4 Without using an ethylene-propylene copolymer (EPM, SP value: 7.9) which is an ⁇ -olefin resin, the amount of anti-aging agent (trade name “AO-50” manufactured by Adeka) is 0.879 g.
- thermoplastic elastomer composition obtained in the same manner as in Example 1 except that 100 g was used. It was.
- the evaluation results of the properties of the thermoplastic elastomer composition thus obtained are shown in Table 1.
- thermoplastic elastomer composition (Example 5) Without using an ethylene-propylene copolymer (EPM, SP value: 7.9) which is an ⁇ -olefin resin, the amount of anti-aging agent (trade name “AO-50” manufactured by Adeka) is 0.879 g. Then, instead of using 100 g of the polyamide 12 (SP value: 13.0), an ethylene-methyl acrylate copolymer (EMA: trade name “ET350X” manufactured by Nippon Polyolefin Co., Ltd., SP value: 9.1, Difference in SP value between EMA and MEBM (absolute value): 1.1) A thermoplastic elastomer composition and a sheet thereof were obtained in the same manner as in Example 1 except that 200 g was used. The evaluation results of the properties of the thermoplastic elastomer composition thus obtained are shown in Table 1.
- Example 6 Organized clay types from Hojun Co., Ltd. under the trade name "Esven WX (Types of ammonium salts as organic agents: Dimethyldioctadecyl ammonium and dimethyl stearyl benzyl ammonium (2 types in total))”
- the product name was changed to “Esven NO12S (type of ammonium salt as an organic agent: oleylbis (2-hydroxyethyl) methylammonium (1 type in total))” (the amount used was the same at 0.1 g)
- the thermoplastic elastomer composition was the same as in Example 1, except that the amount of polyamide 12 (trade name “UBESTA Polyamide 12” manufactured by Ube Industries, SP value: 13.0) was changed from 100 g to 300 g. And a sheet thereof was obtained.
- the evaluation results of the properties of the thermoplastic elastomer composition thus obtained are shown in Table 1.
- thermoplastic elastomer composition without using an ethylene-propylene copolymer (EPM, SP value: 7.9) which is an ⁇ -olefin resin, the polyamide 12 (trade name “UBESTA Polyamide 12” manufactured by Ube Industries, Ltd., SP value: 9.
- EPM ethylene-propylene copolymer
- SP value 7.9
- a thermoplastic elastomer composition and a sheet thereof were obtained in the same manner as in Example 1 except that the amount of 1) used was changed from 100 g to 200 g.
- the evaluation results of the properties of the thermoplastic elastomer composition thus obtained are shown in Table 1.
- Example 8 Without using an ethylene-propylene copolymer (EPM, SP value: 7.9) which is an ⁇ -olefin resin, the amount of anti-aging agent (trade name “AO-50” manufactured by Adeka) is 0.879 g.
- Example 1 except that the amount of polyamide 12 (trade name “UBESTA Polyamide 12” manufactured by Ube Industries Ltd., SP value: 9.1) was changed from 100 g to 300 g.
- a thermoplastic elastomer composition and a sheet thereof were obtained. The evaluation results of the properties of the thermoplastic elastomer composition thus obtained are shown in Table 1.
- Example 9 The amount of anti-aging agent (trade name “AO-50” manufactured by Adeka) was changed from 0.879 g to 0.979 g, and the type of paraffin oil was changed to JX Nippon Mining & Energy Corporation (new company name “JXTG Energy Co., Ltd.”) The product name was changed from “Super Oil M Series P500S” manufactured by “Company”) to “Diana Process Oil PW380” manufactured by Idemitsu Kosan Co., Ltd. (the amount used was the same at 400 g). Similarly, a thermoplastic elastomer composition and a sheet thereof were obtained. The evaluation results of the properties of the thermoplastic elastomer composition thus obtained are shown in Table 1.
- the kinematic viscosity of paraffin oil (trade name “Diana Process Oil PW380” manufactured by Idemitsu Kosan Co., Ltd.) was 380 mm 2 / s, the Cp value was 68.0%, and the aniline point was 143 ° C.
- thermoplastic elastomer composition (Comparative Example 1) The amount of anti-aging agent (trade name “AO-50” manufactured by Adeka) was changed from 0.879 g to 0.779 g, and non-organized clay (manufactured by Kunimine Kogyo Co., Ltd.) was used instead of organic clay.
- the thermoplastic elastomer composition and its sheet were obtained in the same manner as in Example 1 except that the product name “Kunipia F” was used as it was (the amount used was the same at 0.1 g).
- the evaluation results of the properties of the thermoplastic elastomer composition thus obtained are shown in Table 1.
- thermoplastic elastomer composition (Comparative Example 2)
- SP value: 13.0) The evaluation results of the properties of the thermoplastic elastomer composition thus obtained are shown in Table 1.
- compositions comprising a polymer (EMA) having a value of 9.1 (such SP value is 1.1 greater than the SP value of MEBM), the 100% modulus is all 0 .46 or more, and when using non-organic clay instead of organic clay (Comparative Example 1: 100% modulus is 0.42) and SP If is not used polymers such as a 9.0 or higher (Comparative Example 2: 100% modulus 0.42) as compared to, it was found to be higher value of 100% modulus.
- EMA polymer having a value of 9.1
- SP value is 1.1 greater than the SP value of MEBM
- the change in the amount of the anti-aging agent is considered to be a slight difference and does not significantly affect the properties of the composition
- a polymer (EMA) having an SP value of 9.1 is used.
- the polymer (polyamide 12 (nylon)) having an SP value of 13.0 is used (Example 7) than in the case (Example 5)
- the 100% modulus is found to be higher.
- the SP value was 9.0 or more and the SP value was 0.5 or more larger than the SP value of the elastomeric polymer. It has also been found that the 100% modulus becomes higher as the amount used increases.
- Example 3 and Example 6 when Example 3 and Example 6 are compared, their compositions differ in the type of organoclay (the change in the amount of anti-aging agent is a slight difference, which greatly affects the properties of the composition).
- an organic agent dimethyldioctadecylammonium, dimethylstearylbenzylammonium
- other ammonium It was found that the 100% modulus was higher than when the organic agent (oleylbis (2-hydroxyethyl) methylammonium) comprising a salt was used (Example 6).
- organoclay and SP value 13.0 (reaction product of maleic anhydride-modified ethylene-butene copolymer (SP value 8.0) and trishydroxyethyl isocyanurate), organoclay and SP value 13.0 ( The SP value is 5.0 (greater than the SP value of MEBM)) (polyamide 12 (nylon)) or the SP value is 9.1 (the SP value is 1.1 larger than the SP value of MEBM).
- the breaking strength is a value of 2.76 or more, and an unorganized clay is used instead of the organized clay.
- the breaking strength is 2.55). Strength was found to be higher value.
- the SP value is 9.0 or more.
- a combination of a polymer having an SP value of 0.5 or more than the SP value of an elastomeric polymer and an organized clay was used (Examples 1 to 9), 100% modulus and breaking strength were used as indices. It was confirmed that the tensile strength becomes a higher level.
- organoclay and SP value 13.0 (reaction product of maleic anhydride-modified ethylene-butene copolymer (SP value 8.0) and trishydroxyethyl isocyanurate), organoclay and SP value 13.0 ( The SP value is 5.0 (greater than the SP value of MEBM)) (polyamide 12 (nylon)) or the SP value is 9.1 (the SP value is 1.1 larger than the SP value of MEBM).
- the compositions (Examples 1 to 9) containing the polymer (EMA) both the degree of swelling with respect to hexane and the degree of swelling with respect to oil (JIS # 3 oil) are organicated instead of the organic clay.
- thermoplastic elastomer compositions (Examples 1 to 9) of the present invention have sufficiently high tensile strength and sufficiently high oil resistance.
- Example 10 Instead of using an ethylene-propylene copolymer (EPM, SP value: 7.9), which is an ⁇ -olefin resin, instead of using 2.62 g of trishydroxyethyl isocyanurate, pentaerythritol (manufactured by Tokyo Chemical Industry Co., Ltd.) is used. 0.02 g was used, the amount of anti-aging agent (trade name “AO-50” manufactured by Adeka) was changed from 0.879 g to 4.00 g, and the amount of styrene block copolymer was changed from 200 g to 300 g.
- EPM ethylene-propylene copolymer
- SP value: 7.9 which is an ⁇ -olefin resin
- pentaerythritol manufactured by Tokyo Chemical Industry Co., Ltd.
- 0.02 g was used, the amount of anti-aging agent (trade name “AO-50” manufactured by Adeka) was changed from 0.879 g to 4.00 g, and the amount of
- thermoplastic elastomer composition instead of using 400 g of the trade name “Super Oil M Series P500S” manufactured by JX Nippon Oil & Energy Corporation (new company name “JXTG Energy Co., Ltd.”) as paraffin oil, 600 g of the product name “YU-8J” manufactured by SK Oil Co., Ltd. Used and the same manner as in Example 1 except that the amount of polyamide 12 used was changed from 100 g to 300 g. Thermoplastic elastomer composition and to give the sheet. The evaluation results of the properties of the thermoplastic elastomer composition thus obtained are shown in Table 2.
- thermoplastic elastomer composition (Comparative Example 3) Implemented except that 300 g of polyethylene (high density polyethylene (HDPE): trade name “HJ590N” manufactured by Nippon Polyethylene, SP value: 7.9), which is an ⁇ -olefin resin, was used instead of 300 g of polyamide 12.
- HDPE high density polyethylene
- HPPE high density polyethylene
- SP value: 7.9 trade name “HJ590N” manufactured by Nippon Polyethylene, SP value: 7.9
- thermoplastic elastomer composition (Example 11) The type of organic clay was changed from the product name “Esven WX” manufactured by Hojun Co., Ltd. to the product name “Esven NO12S” manufactured by Hojun Co., Ltd. (The product name “AO-50” manufactured by Adeka) was changed from 4.00 g to 4.81 g, and the usage amount of polyamide 12 was changed from 300 g to 600 g. Thus, a thermoplastic elastomer composition and a sheet thereof were obtained. The evaluation results of the properties of the thermoplastic elastomer composition thus obtained are shown in Table 2.
- thermoplastic elastomer composition (Comparative Example 4)
- 600 g of polyethylene high density polyethylene (HDPE): trade name “HJ590N” manufactured by Nippon Polyethylene, SP value: 7.9), which is an ⁇ -olefin resin, was used instead of 600 g of polyamide 12.
- HDPE high density polyethylene
- HPPE high density polyethylene
- SP value: 7.9 trade name “HJ590N” manufactured by Nippon Polyethylene, SP value: 7.9
- Example 12 Instead of using an ethylene-propylene copolymer (EPM, SP value: 7.9), which is an ⁇ -olefin resin, instead of using 2.62 g of trishydroxyethyl isocyanurate, 2,4-diamino-6-phenyl-1 , 3,5-triazine (manufactured by Tokyo Kasei Kogyo Co., Ltd.), and the amount of anti-aging agent (trade name “AO-50” manufactured by Adeka Co., Ltd.) was changed from 0.879 g to 4.00 g, Instead of using 400g of the trade name "Super Oil M Series P500S" manufactured by JX Nippon Oil & Energy Corporation (new name "JXTG Energy Co., Ltd.”) as paraffin oil, changing the amount of styrene block copolymer from 100g to 300g In addition, 600 g of the product name “YU-8J” manufactured by SK Oil Co., Ltd.
- EPM ethylene-propylene copolymer
- thermoplastic elastomer composition thus obtained is shown in Table 2.
- thermoplastic elastomer composition (Comparative Example 5) Implemented except that 300 g of polyethylene (high density polyethylene (HDPE): trade name “HJ590N” manufactured by Nippon Polyethylene, SP value: 7.9), which is an ⁇ -olefin resin, was used instead of 300 g of polyamide 12.
- HDPE high density polyethylene
- HPPE high density polyethylene
- SP value: 7.9 trade name “HJ590N” manufactured by Nippon Polyethylene, SP value: 7.9
- thermoplastic elastomer composition (Example 13) The type of organic clay was changed from the product name “Esven WX” manufactured by Hojun Co., Ltd. to the product name “Esven NO12S” manufactured by Hojun Co., Ltd. (The trade name “AO-50” manufactured by Adeka) was changed from 4.00 g to 4.81 g, and the usage amount of polyamide 12 was changed from 300 g to 600 g. Thus, a thermoplastic elastomer composition and a sheet thereof were obtained. The evaluation results of the properties of the thermoplastic elastomer composition thus obtained are shown in Table 2.
- thermoplastic elastomer composition (Comparative Example 6) Implemented except that 600 g of polyethylene (high density polyethylene (HDPE): trade name “HJ590N” manufactured by Nippon Polyethylene, SP value: 7.9), which is an ⁇ -olefin resin, was used instead of 600 g of polyamide 12.
- HDPE high density polyethylene
- HPPE high density polyethylene
- SP value: 7.9 trade name “HJ590N” manufactured by Nippon Polyethylene, SP value: 7.9
- Example 14 Without using an ethylene-propylene copolymer (EPM, SP value: 7.9) which is an ⁇ -olefin resin, the amount of anti-aging agent (trade name “AO-50” manufactured by Adeka) is 0.879 g.
- thermoplastic elastomer composition From 4.0 g to 200 g, the amount of styrene block copolymer used was changed from 200 g to 300 g, and the product name “Super Oil” manufactured by JX Nippon Oil & Energy Corporation (new name “JXTG Energy Co., Ltd.”) as paraffin oil
- the product name “Super Oil” manufactured by JX Nippon Oil & Energy Corporation new name “JXTG Energy Co., Ltd.”
- the amount of polyamide 12 used was changed from 100 g to 300 g.
- a thermoplastic elastomer composition and its sheet were obtained.
- the evaluation results of the properties of the thermoplastic elastomer composition thus obtained are shown in Table 2.
- thermoplastic elastomer composition (Comparative Example 7) Implemented except that 300 g of polyethylene (high density polyethylene (HDPE): trade name “HJ590N” manufactured by Nippon Polyethylene, SP value: 7.9), which is an ⁇ -olefin resin, was used instead of 300 g of polyamide 12.
- HDPE high density polyethylene
- HPPE high density polyethylene
- SP value: 7.9 trade name “HJ590N” manufactured by Nippon Polyethylene, SP value: 7.9
- Example 15 The type of organic clay was changed from the product name “Esven WX” manufactured by Hojun Co., Ltd. to the product name “Esven NO12S” manufactured by Hojun Co., Ltd. (The product name “AO-50” manufactured by Adeka) was changed from 4.00 g to 4.81 g, and the usage amount of polyamide 12 was changed from 300 g to 600 g, as in Example 14. Thus, a thermoplastic elastomer composition and a sheet thereof were obtained. The evaluation results of the properties of the thermoplastic elastomer composition thus obtained are shown in Table 2.
- thermoplastic elastomer composition (Comparative Example 8) Implemented except that 300 g of polyethylene (high density polyethylene (HDPE): trade name “HJ590N” manufactured by Nippon Polyethylene, SP value: 7.9), which is an ⁇ -olefin resin, was used instead of 300 g of polyamide 12.
- HDPE high density polyethylene
- HPPE high density polyethylene
- SP value: 7.9 trade name “HJ590N” manufactured by Nippon Polyethylene, SP value: 7.9
- Example 11 and Comparative Example 4 Comparison between Example 11 and Comparative Example 4, Example 12 and Comparative Example 5, Example 13 and Comparative Example 6, Example 14 and Comparative Example 7, and Example 15 and Comparative Example 8) Then, the composition containing each polymer (polyamide 12) having an SP value of 13.0 (each example) has a higher value of 100% modulus and higher breaking strength, and the degree of swelling with respect to hexane and oil (JIS #). 3 The degree of swelling yl) becomes lower value none was confirmed.
- an elastomeric polymer maleic anhydride-modified ethylene-butene copolymer (SP value 8.0), pentaerythritol, 2,4-diamino-6-phenyl-1,3,5-triazine Or a reaction product with trishydroxyethyl isocyanurate), a polymer having an SP value of 9.0 or more and an SP value of 0.5 or more larger than the SP value of the elastomeric polymer, and an organic clay was used in combination.
- SP value 8.0 maleic anhydride-modified ethylene-butene copolymer
- pentaerythritol 2,4-diamino-6-phenyl-1,3,5-triazine Or a reaction product with trishydroxyethyl isocyanurate
- SP value 8.0 maleic anhydride-modified ethylene-butene copolymer
- pentaerythritol 2,4-diamino-6-phenyl-1,
- thermoplastic elastomer compositions and molded articles (sheets) obtained in Examples 10 to 15 had higher tensile strength and higher oil resistance. .
- compositions 10 to 15 containing a polymer (polyamide 12) having an SP value of 13.0 and the polymer (polyamide 12) having an SP value of 13.0
- the SP value was 7.9.
- the composition containing the polymer (polyethylene) (Comparative Examples 3 to 8) is compared from the viewpoint of the heat resistant temperature, the elastomeric polymer (maleic anhydride-modified ethylene-butene copolymer (SP value is 8.0)) and , Pentaerythritol, 2,4-diamino-6-phenyl-1,3,5-triazine or a reaction product with trishydroxyethyl isocyanurate) and a polymer (polyamide 12) having an SP value of 13.0
- the heat resistant temperature is higher, the SP value is 9.0 or more, and the SP value is an elastomeric polymer.
- a thermoplastic elastomer composition of the present invention containing 0.5 or
- thermoplastic elastomer composition capable of having a sufficiently high tensile strength and excellent oil resistance, and a method for producing the same. Furthermore, according to this invention, it becomes possible to provide the elastomer molded object formed by shape
- thermoplastic elastomer composition of the present invention can exhibit various properties as described above in a well-balanced manner.
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Abstract
Description
前記エラストマー成分100質量部に対して20質量部以下の含有比率の有機化クレイと、
前記エラストマー性ポリマー(A)及び(B)以外のポリマーであり、SP値が9.0以上であり、かつ、前記エラストマー成分のSP値よりも0.5以上大きな値のSP値を有するポリマー(Z)と、
を含有してなるものである。
有機化クレイと、
SP値が9.0以上であり、かつ、前記エラストマー性ポリマー(D)のSP値よりも0.5以上大きな値のSP値を有するポリマー(Z)と、
を混合して混合物を得る第一工程と、
前記混合物に、前記環状酸無水物基と反応して水素結合性架橋部位を形成する化合物(I)、並びに、前記化合物(I)及び前記環状酸無水物基と反応して共有結合性架橋部位を形成する化合物(II)の混合原料のうちの少なくとも1種の原料化合物を、前記環状酸無水物基を側鎖に有するエラストマー性ポリマー(D)100質量部に対して0.1~10質量部の割合で添加し、前記エラストマー性ポリマー(D)と前記原料化合物とを反応させることにより、熱可塑性エラストマー組成物を得る第二工程と、
を含むこと、
前記第二工程において得られる前記熱可塑性エラストマー組成物が、カルボニル含有基および/または含窒素複素環を有する水素結合性架橋部位を含有する側鎖を有しかつガラス転移点が25℃以下であるエラストマー性ポリマー(A)、並びに、側鎖に水素結合性架橋部位及び共有結合性架橋部位が含有されておりかつガラス転移点が25℃以下であるエラストマー性ポリマー(B)からなる群から選択される少なくとも1種のエラストマー成分と、
前記エラストマー成分100質量部に対して20質量部以下の含有比率の有機化クレイと、
前記エラストマー性ポリマー(A)及び(B)以外のポリマーであり、SP値が9.0以上であり、かつ、前記エラストマー成分のSP値よりも0.5以上大きな値のSP値を有するポリマー(Z)と、
を含有してなる組成物であること、及び、
前記第一工程において、前記熱可塑性エラストマー組成物中の前記有機化クレイの含有量が前記エラストマー成分100質量部に対して20質量部以下となるような割合で前記有機化クレイを用いて、前記エラストマー性ポリマー(D)と、前記有機化クレイと、前記ポリマー(Z)とを混合する、方法である。
前記エラストマー成分が、無水マレイン酸変性エラストマー性ポリマーと、水酸基、チオール基及びアミノ基のうちの少なくとも1種の置換基を有していてもよいトリアゾール、水酸基、チオール基及びアミノ基のうちの少なくとも1種の置換基を有していてもよいピリジン、水酸基、チオール基及びアミノ基のうちの少なくとも1種の置換基を有していてもよいチアジアゾール、水酸基、チオール基及びアミノ基のうちの少なくとも1種の置換基を有していてもよいイミダゾール、水酸基、チオール基及びアミノ基のうちの少なくとも1種の置換基を有していてもよいイソシアヌレート、水酸基、チオール基及びアミノ基のうちの少なくとも1種の置換基を有していてもよいトリアジン、水酸基、チオール基及びアミノ基のうちの少なくとも1種の置換基を有していてもよいヒダントイン、トリスヒドロキシエチルイソシアヌレート、スルファミド、ペンタエリスリトール、2,4-ジアミノ-6-フェニル-1,3,5-トリアジン、並びに、ポリエーテルポリオールのうちの少なくとも1種の化合物との反応物からなる群から選択される少なくとも1種であることが好ましい。
本発明の熱可塑性エラストマー組成物は、カルボニル含有基および/または含窒素複素環を有する水素結合性架橋部位を含有する側鎖を有しかつガラス転移点が25℃以下であるエラストマー性ポリマー(A)、並びに、側鎖に水素結合性架橋部位及び共有結合性架橋部位が含有されておりかつガラス転移点が25℃以下であるエラストマー性ポリマー(B)からなる群から選択される少なくとも1種のエラストマー成分と、
前記エラストマー成分100質量部に対して20質量部以下の含有比率の有機化クレイと、
前記エラストマー性ポリマー(A)及び(B)以外のポリマーであり、SP値が9.0以上であり、かつ、前記エラストマー成分のSP値よりも0.5以上大きな値のSP値を有するポリマー(Z)と、
を含有してなるものである。
このようなエラストマー成分は、上述のエラストマー性ポリマー(A)~(B)からなる群から選択される少なくとも1種のものである。このようなエラストマー性ポリマー(A)~(B)において、「側鎖」とは、エラストマー性ポリマーの側鎖および末端をいう。また、「カルボニル含有基および/または含窒素複素環を有する水素結合性架橋部位を含有する側鎖(以下、便宜上、場合により「側鎖(a)」と称する。)」とは、エラストマー性ポリマーの主鎖(前記エラストマー成分として含まれるポリマーの主鎖)を形成する原子(通常、炭素原子)に、水素結合性架橋部位としてのカルボニル含有基および/または含窒素複素環(より好ましくはカルボニル含有基および含窒素複素環)が化学的に安定な結合(共有結合)をしていることを意味する。また、「側鎖に水素結合性架橋部位及び共有結合性架橋部位が含有され」とは、水素結合性架橋部位を有する側鎖(以下、便宜上、場合により「側鎖(a’)」と称する。)と、共有結合性架橋部位を有する側鎖(以下、便宜上、場合により「側鎖(b)」と称する。)の双方の側鎖を含むことによってポリマーの側鎖に水素結合性架橋部位及び共有結合性架橋部位の双方が含有されている場合の他、水素結合性架橋部位及び共有結合性架橋部位の双方を有する側鎖(1つの側鎖中に水素結合性架橋部位及び共有結合性架橋部位の双方を含む側鎖:以下、このような側鎖を便宜上、場合により「側鎖(c)」と称する。)を含むことで、ポリマーの側鎖に、水素結合性架橋部位及び共有結合性架橋部位の双方が含有されている場合を含む概念である。
水素結合性架橋部位を含有する側鎖(a’)は、水素結合による架橋を形成し得る基(例えば、水酸基、後述の側鎖(a)に含まれる水素結合性架橋部位等)を有し、その基に基づいて水素結合を形成する側鎖であればよく、その構造は特に制限されるものではない。ここにおいて、水素結合性架橋部位は、水素結合によりポリマー同士(エラストマー同士)を架橋する部位である。なお、水素結合による架橋は、水素のアクセプター(孤立電子対を含む原子を含有する基等)と、水素のドナー(電気陰性度が大きな原子に共有結合した水素原子を備える基等)とがあって初めて形成されることから、エラストマー同士の側鎖間において水素のアクセプターと水素のドナーの双方が存在しない場合には、水素結合による架橋が形成されない。そのため、エラストマー同士の側鎖間において、水素のアクセプターと水素のドナーの双方が存在することによって初めて、水素結合性架橋部位が系中に存在することとなる。なお、本発明においては、エラストマー同士の側鎖間において、水素のアクセプターとして機能し得る部分(例えばカルボニル基等)と、水素のドナーとして機能し得る部分(例えば水酸基等)の双方が存在することをもって、その側鎖の水素のアクセプターとして機能し得る部分とドナーとして機能し得る部分とを、水素結合性架橋部位と判断することができる。
カルボニル含有基および/または含窒素複素環を有する水素結合性架橋部位を含有する側鎖(a)は、カルボニル含有基および/または含窒素複素環を有するものであればよく、他の構成は特に限定されない。このような水素結合性架橋部位としては、カルボニル含有基および含窒素複素環を有するものがより好ましい。
で表される構造部分を含有する側鎖が1つの側鎖として主鎖に導入されていることがより好ましい。このように、前記側鎖(a)の前記水素結合性架橋部位としては、上記一般式(1)で表される構造部分を含有することが好ましい。
ここで、含窒素複素環Aは上記式(1)の含窒素複素環Aと基本的に同様であり、置換基BおよびDはそれぞれ独立に、上記式(1)の置換基Bと基本的に同様である。ただし、上記式(3)における置換基Dは、上記式(1)の置換基Bで例示したもののうち、単結合;酸素原子、窒素原子またはイオウ原子を含んでもよい炭素数1~20のアルキレン基またはアラルキレン基の共役系を形成するものであることが好ましく、単結合であることが特に好ましい。すなわち、上記式(3)のイミド窒素と共に、酸素原子、窒素原子またはイオウ原子を含んでもよい炭素数1~20のアルキレンアミノ基またはアラルキレンアミノ基を形成することが好ましく、上記式(3)のイミド窒素に含窒素複素環が直接結合する(単結合)ことが特に好ましい。具体的には、上記置換基Dとしては、単結合;上記した酸素原子、イオウ原子またはアミノ基を末端に有する炭素数1~20のアルキレンエーテルまたはアラルキレンエーテル基等;異性体を含む、メチレン基、エチレン基、プロピレン基、ブチレン基、ヘキシレン基、フェニレン基、キシリレン基等が挙げられる。
で表される構造部分を含有することが好ましい。このような式(101)中の含窒素複素環Aは上記式(1)の含窒素複素環Aと基本的に同様のものである。また、このような側鎖(a)の前記水素結合性架橋部位としては、高モジュラス、高破断強度の観点から、下記一般式(102):
本明細書において「共有結合性架橋部位を含有する側鎖(b)」は、エラストマー性ポリマーの主鎖を形成する原子(通常、炭素原子)に、共有結合性架橋部位(後述するアミノ基含有化合物等の「共有結合を生成する化合物」等と反応することで、アミド、エステル、ラクトン、ウレタン、エーテル、チオウレタンおよびチオエーテルからなる群より選択される少なくとも1つの結合を生起しうる官能基等)が化学的に安定な結合(共有結合)をしていることを意味する。なお、側鎖(b)は共有結合性架橋部位を含有する側鎖であるが、共有結合性部位を有しつつ、更に、水素結合が可能な基を有して、側鎖間において水素結合による架橋を形成するような場合には、後述の側鎖(c)として利用されることとなる(なお、エラストマー同士の側鎖間に水素結合を形成することが可能な、水素のドナーと、水素のアクセプターの双方が含まれていない場合、例えば、系中に単にエステル基(-COO-)が含まれている側鎖のみが存在するような場合には、エステル基(-COO-)同士では特に水素結合は形成されないため、かかる基は水素結合性架橋部位としては機能しない。他方、例えば、カルボキシ基やトリアゾール環のような、水素結合の水素のドナーとなる部位と、水素のアクセプターとなる部位の双方を有する構造をエラストマー同士の側鎖にそれぞれ含む場合には、エラストマー同士の側鎖間で水素結合が形成されるため、水素結合性架橋部位が含有されることとなる。また、例えば、エラストマー同士の側鎖間に、エステル基と水酸基とが共存して、それらの基により側鎖間で水素結合が形成される場合、その水素結合を形成する部位が水素結合性架橋部位となる。そのため、側鎖(b)が有する構造自体や、側鎖(b)が有する構造と他の側鎖が有する置換基の種類等に応じて、側鎖(c)として利用される場合がある。)。また、ここにいう「共有結合性架橋部位」は、共有結合によりポリマー同士(エラストマー同士)を架橋する部位である。
このような側鎖(c)は、1つの側鎖中に水素結合性架橋部位及び共有結合性架橋部位の双方を含む側鎖である。このような側鎖(c)に含まれる水素結合性架橋部位は、側鎖(a’)において説明した水素結合性架橋部位と同様のものであり、側鎖(a)中の水素結合性架橋部位と同様のものが好ましい。また、側鎖(c)に含まれる共有結合性架橋部位としては、側鎖(b)中の共有結合性架橋部位と同様のものを利用できる(その好適な架橋も同様のものを利用できる。)。
側鎖(b)及び/又は(c)に関して、共有結合性架橋部位における架橋が、第三級アミノ結合(-N=)、エステル結合(-COO-)を含有している場合であって、これらの結合部位が水素結合性架橋部位としても機能する場合、得られる熱可塑性エラストマー(組成物)の圧縮永久歪および機械的強度(破断伸び、破断強度)がより高度に改善されるとの理由から好ましい。このように、共有結合性架橋部位を有する側鎖中の第三級アミノ結合(-N=)やエステル結合(-COO-)が、他の側鎖との間において、水素結合を形成するような場合、かかる第三級アミノ結合(-N=)、エステル結合(-COO-)を含有している共有結合性架橋部位は、水素結合性架橋部位も備えることとなり、側鎖(c)として機能し得る。
本発明にかかる有機化クレイとしては特に制限されず、例えば、有機化剤により有機化されたクレイを好適に利用することができる。このような「有機化されたクレイ」としては、層間に第4級アンモニウム塩等の有機化剤が導入された状態(例えば、層間に有機化剤が入れ込まれた状態)にあるクレイであることが好ましい。なお、クレイの層間に有機化剤を導入する方法としては特に制限されず、例えば、層状鉱物であるモンモリロナイト等のクレイが有する陽イオン交換性を利用することにより、クレイの層間に有機化剤を導入する方法を適宜採用することが可能である。このように、公知の方法を適宜利用して、クレイの層間に有機化剤が導入されるように、有機化剤により層状鉱物であるクレイを処理することで、有機化されたクレイを容易に得ることができる。なお、このような有機化クレイによれば、クレイの層の剥離をより容易にすることが可能となり、単層のクレイを有機溶媒や樹脂に、より効率よく分散させることが可能となる。
R2N+(CH3)2・X- (I)
(式(I)中、Rはそれぞれ独立にアルキル基及びアラルキル基の中から選択される少なくとも1種を示し、X-はカウンターアニオンを示す。)
で表されるアンモニウム塩の中から選択される少なくとも1種の有機化剤が好ましい。
本発明にかかるポリマー(Z)は、前記エラストマー成分とともに含有される高分子成分である。そして、このようなポリマー(Z)は、前述のエラストマー性ポリマー(A)及びエラストマー性ポリマー(B)以外のポリマーである。ここで、ポリマー(Z)として利用可能なポリマーとしては、前述のエラストマー性ポリマー(A)及び(B)以外のポリマーから選択されるものであればよく、例えば、ガラス転移点が25℃超となるようなポリマー(この場合には水素結合性架橋部位等を有していてもよい。)や、エラストマー性ポリマー(A)及びエラストマー性ポリマー(B)において説明したような側鎖を含まないガラス転移点が25℃以下のポリマー等、を適宜利用できる。
[SP値(E)]=[SP(A1)×{W(A1)/(W(A1)+W(A2))}]+[SP(A2)×{W(A2)/(W(A1)+W(A2))}]
(上記計算式中、SP値(E)はエラストマー成分のSP値を示し、SP(A1)はポリマー(A1)のSP値を示し、SP(A2)はポリマー(A2)のSP値を示し、W(A1)はポリマー(A1)の質量を示し、W(A2)はポリマー(A2)の質量を示す。)
を計算することにより、エラストマー成分のSP値を求めることができる。このように、各成分のSP値に、該当する成分の質量比(なお、1成分のみである場合には質量比は1となる。)を乗じて足し合わせることで、エラストマー成分が混合物である場合のSP値を求めることができる。
[SP値(D)]=SP(D1)×{W(D1)/(W(D1)+W(D2))}+SP(D2)×{W(D2)/(W(D1)+W(D2))}
(上記計算式中、SP値(D)は環状酸無水物基を側鎖に有するエラストマー性ポリマー(D)のSP値を示し、SP(D1)はポリマー(D1)のSP値を示し、SP(D2)はポリマー(D2)のSP値を示し、W(D1)はポリマー(D1)の質量を示し、W(D2)はポリマー(D2)の質量を示す。)
を計算して求められる値を採用する。このように、各成分のSP値に該当する成分の質量比を乗じて足し合わせることで、エラストマー性ポリマー(D)が複数種のポリマーの混合物である場合であってもSP値を求めることができる。更に、ポリマー(Z)が混合物である場合も、同様に、「ポリマー(Z)のSP値」としては、ポリマー(Z)として含まれる各ポリマーのSP値に、ポリマー(Z)として含まれる各ポリマーの質量比(総量に対する含有割合)を乗じた値をそれぞれ求め、その後、得られた値を足し合わせること(得られた値の和を求めること)により求めれる値を採用する。
本発明の熱可塑性エラストマー組成物は、前記エラストマー成分と、前記有機化クレイと、前記ポリマー(Z)とを含有するものである。
本発明の熱可塑性エラストマー組成物の製造方法は、環状酸無水物基を側鎖に有するエラストマー性ポリマー(D)と、
有機化クレイと、
SP値が9.0以上であり、かつ、前記エラストマー性ポリマー(D)のSP値よりも0.5以上大きな値のSP値を有するポリマー(Z)と、
を混合して混合物を得る第一工程と、
前記混合物に、前記環状酸無水物基と反応して水素結合性架橋部位を形成する化合物(I)、並びに、前記化合物(I)及び前記環状酸無水物基と反応して共有結合性架橋部位を形成する化合物(II)の混合原料のうちの少なくとも1種の原料化合物を、前記環状酸無水物基を側鎖に有するエラストマー性ポリマー(D)100質量部に対して0.1~10質量部の割合で添加し、前記エラストマー性ポリマー(D)と前記原料化合物とを反応させることにより、熱可塑性エラストマー組成物を得る第二工程と、
を含むこと、
前記第二工程において得られる前記熱可塑性エラストマー組成物が、カルボニル含有基および/または含窒素複素環を有する水素結合性架橋部位を含有する側鎖を有しかつガラス転移点が25℃以下であるエラストマー性ポリマー(A)、並びに、側鎖に水素結合性架橋部位及び共有結合性架橋部位が含有されておりかつガラス転移点が25℃以下であるエラストマー性ポリマー(B)からなる群から選択される少なくとも1種のエラストマー成分と、
前記エラストマー成分100質量部に対して20質量部以下の含有比率の有機化クレイと、
前記エラストマー性ポリマー(A)及び(B)以外のポリマーであり、SP値が9.0以上であり、かつ、前記エラストマー成分のSP値よりも0.5以上大きな値のSP値を有するポリマー(Z)と、
を含有してなる組成物であること、及び、
前記第一工程において、前記熱可塑性エラストマー組成物中の前記有機化クレイの含有量が前記エラストマー成分100質量部に対して20質量部以下となるような割合で前記有機化クレイを用いて、前記エラストマー性ポリマー(D)と、前記有機化クレイと、前記ポリマー(Z)とを混合する、方法である。以下、第一工程と第二工程とを分けて説明する。
第一工程は、環状酸無水物基を側鎖に有するエラストマー性ポリマー(D)と、前記有機化クレイと、前記ポリマー(Z)とを混合して混合物を得る工程である。
第二工程は、前記混合物に、前記環状酸無水物基と反応して水素結合性架橋部位を形成する化合物(I)、並びに、前記化合物(I)及び前記環状酸無水物基と反応して共有結合性架橋部位を形成する化合物(II)の混合原料のうちの少なくとも1種の原料化合物を、前記環状酸無水物基を側鎖に有するエラストマー性ポリマー(D)100質量部に対して0.1~10質量部の割合で添加し、前記ポリマーと前記原料化合物とを反応させることにより、熱可塑性エラストマー組成物を得る工程である。
前記エラストマー成分100質量部に対して20質量部以下の含有比率の有機化クレイと、
エラストマー性ポリマー(A)及び(B)以外のポリマーであり、SP値が9.0以上であり、かつ、前記エラストマー成分のSP値よりも0.5以上大きな値のSP値を有するポリマー(Z)と、を含有してなる組成物を得ることができる。
前記エラストマー成分が、無水マレイン酸変性エラストマー性ポリマーと、水酸基、チオール基及びアミノ基のうちの少なくとも1種の置換基を有していてもよいトリアゾール、水酸基、チオール基及びアミノ基のうちの少なくとも1種の置換基を有していてもよいピリジン、水酸基、チオール基及びアミノ基のうちの少なくとも1種の置換基を有していてもよいチアジアゾール、水酸基、チオール基及びアミノ基のうちの少なくとも1種の置換基を有していてもよいイミダゾール、水酸基、チオール基及びアミノ基のうちの少なくとも1種の置換基を有していてもよいイソシアヌレート、水酸基、チオール基及びアミノ基のうちの少なくとも1種の置換基を有していてもよいトリアジン、水酸基、チオール基及びアミノ基のうちの少なくとも1種の置換基を有していてもよいヒダントイン、トリスヒドロキシエチルイソシアヌレート、スルファミド、ペンタエリスリトール、2,4-ジアミノ-6-フェニル-1,3,5-トリアジン、並びに、ポリエーテルポリオールのうちの少なくとも1種の化合物(前記原料化合物)との反応物からなる群から選択される少なくとも1種であることが好ましい。
本発明のエラストマー成形体は、上記本発明の熱可塑性エラストマー組成物を成形してなるもの(上記本発明の熱可塑性エラストマー組成物の成形物)である。このような本発明のエラストマー成形体は、上記本発明の熱可塑性エラストマー組成物の成形してなるものであればよく、用途に応じて、例えば、上記本発明の熱可塑性エラストマー組成物を単独で成形してなる熱可塑性エラストマー組成物の成形物そのものであってもよく、あるいは、他の部材と適宜組み合わせた構造体となるように上記本発明の熱可塑性エラストマー組成物を成形してなるもの(他の部材を含んでなるもの)であってもよい。このように、本発明のエラストマー成形体は、上記本発明の熱可塑性エラストマー組成物を成形してなるものであればよく、その形状や形態等は特に制限されず、他の部材を含んだ構造体であってもよい。なお、このような他の部材としては特に制限されず、用途や必要に応じて、その用途に利用される公知の材料(部材)を適宜利用できる。
各実施例及び各比較例で得られた熱可塑性エラストマー組成物のシート(厚さ2mm、縦150mm、横150mm)をそれぞれ用い、JIS K6253(2012年発行)に準拠して、JIS-A硬度を測定した。
各実施例及び各比較例で得られた熱可塑性エラストマー組成物のシート(厚さ2mm、縦150mm、横150mm)をそれぞれ用い、3号ダンベル状の試験片を打ち抜き作成し、引張速度500mm/分での引張試験をJIS K6251(2010年発行)に準拠して行い、破断強度(TB)[単位:MPa]を室温(25℃)にて測定した。
各実施例及び各比較例で得られた熱可塑性エラストマー組成物のシート(厚さ2mm、縦150mm、横150mm)をそれぞれ用い、3号ダンベル状の試験片を打ち抜き作成し、引張速度500mm/分での引張試験をJIS K6251(2010年発行)に準拠して行い、100%モジュラス(M100)[MPa]を室温(25℃)にて測定した。
各実施例及び各比較例等で得られた熱可塑性エラストマー組成物のヘキサンに対する膨潤度は、各実施例及び各比較例等で得られた熱可塑性エラストマー組成物のシート(厚さ2mm、縦150mm、横150mm)をそれぞれ用いて、縦40mm、横5mm、厚さ2mmの試験片をそれぞれ作成し、該試験片の体積(膨潤前の体積)を密度計(アルファミラージュ社製の商品名「SD-200L」)を利用して測定する。その後、室温(25℃)条件下、該試験片をヘキサン中に1時間浸漬した後、取り出し、ヘキサン浸漬後の膨潤した試験片の体積(膨潤後の体積)を前記密度計を利用して測定する。そして、試験片の膨潤前後(ヘキサン浸漬前後)の体積に基づいて、下記計算式(I):
[膨潤度(%)]={([膨潤後の体積]/[膨潤前の体積])×100}-100 (I)
を計算して、ヘキサンに対する膨潤度を求めた。なお、このような膨潤度が低いほど耐油性が高いといえる。
各実施例及び各比較例等で得られた熱可塑性エラストマー組成物のオイル(JIS#3オイル)に対する膨潤度は、ヘキサンの代わりにオイル(JIS#3オイル)を用い、かつ、該オイルへの浸漬時間を1時間から24時間に変更した(オイル(JIS#3オイル)中に試験片を24時間浸漬するよう変更した)以外は、上述のヘキサンに対する膨潤度の測定において説明した方法と同様の方法を採用して、試験片の膨潤前後(オイル浸漬前後)の体積をそれぞれ求めて上記式(I)を計算し、オイル(JIS#3オイル)に対する膨潤度を求めた。
実施例10~15及び比較例3~8で得られた熱可塑性エラストマー組成物のシート(厚さ2mm、縦150mm、横150mm)をそれぞれ用いて、横5mm、縦20mm、厚さ2mmの試験片を打ち抜き、DMA測定装置(UBM社製の商品名「Rheogel-E4000」)を用いて、測定時に試験片の縦方向(試験片の長さが20mmとなる辺の方向)に歪みが生じるように、前記試験片を前記装置に設置し、50~200℃まで2℃/分の昇温速度で昇温しながら、測定間隔:2℃、測定周波数:10Hz、測定モード:引張モード、及び、動的振幅:2%の歪みの測定条件で、前記試験片に対して歪みをかけて、該試験片(シート)の貯蔵弾性率(E’[単位:Pa])が低下する変曲点の温度を耐熱温度として求めた。
先ず、スチレンブロック共重合体(スチレン-エチレン-ブチレン-スチレンブロック共重合体(SEBS):クレイトン社製の商品名「G1633U」、分子量:40万~50万、スチレン含有量:30質量%)200gを加圧ニーダーに投入して、200℃の条件で練りながら、前記加圧ニーダー中にパラフィンオイル(JX日鉱日石エネルギー社(新社名「JXTGエネルギー株式会社」)製の商品名「スーパーオイルMシリーズ P500S」、動粘度:472mm2/s、Cp値:68.7%、アニリン点:123℃)400gを滴下し、スチレン-エチレン-ブチレン-スチレンブロック共重合体とパラフィンオイルとを1分間混合した。次いで、前記加圧ニーダー中に、無水マレイン酸変性エチレン-ブテン共重合体(マレイン化EBM(MEBM):三井化学社製の商品名「タフマーMH5040」、結晶化度:4%、SP値:8.0)100g、ポリアミド12(宇部興産社製の商品名「UBESTA Polyamide12」、SP値:13.0、ポリアミド12とMEBMのSP値の差(絶対値):5.0)100g、α-オレフィン系樹脂であるエチレンプロピレン共重合体(EPM:三井化学社製の商品名「タフマーDF7350」、結晶化度:10%、MFR:35g/10分(2.16kg、190℃)、Mw:100,000、SP値:7.9、EPMとMEBMのSP値の差(絶対値):0.1)75gおよび老化防止剤(アデカ社製の商品名「AO-50」)0.879gを更に投入し、温度を180℃として2分間混練して第一の混合物(前記マレイン化EBMと、ポリアミド12(前記ポリマー(Z)に相当)とを含む混合物)を得た。なお、かかる混練工程により、前記第一の混合物は可塑化された。次に、前記加圧ニーダー中の前記第一の混合物に対して、有機化クレイ(株式会社ホージュン製の商品名「エスベンWX」、有機化剤としてのアンモニウム塩の種類:ジメチルジオクタデシルアンモニウム及びジメチルステアリルベンジルアンモニウム(計2種))0.1gを更に加えて、180℃で4分間混練して第二の混合物を得た。次に、前記加圧ニーダー中の前記第二の混合物にトリスヒドロキシエチルイソシアヌレート(日星産業社製の商品名「タナックP」)を2.62g加え、180℃で8分間混合し、熱可塑性エラストマー組成物を調製した。
このようにして得られた熱可塑性エラストマー性組成物42gを、200℃(予熱)で3分加熱したシート形成用のモールド(厚み2mm、縦150mm、横150mm)内に導入し、200℃の条件下において、16MPaで5分間加圧して成形し、次いで、水冷プレスで16MPaで2分間冷却することにより、前記熱可塑性エラストマー組成物のシート(厚み2mm、縦150mm、横150mm)を得た。このようにして得られた熱可塑性エラストマー組成物の特性の評価結果を表1に示す。
老化防止剤(アデカ社製の商品名「AO-50」)の使用量を0.879gから0.979gに変更し、かつ、前記ポリアミド12(宇部興産社製の商品名「UBESTA Polyamide12」、SP値:9.1)の使用量を100gから200gに変更した以外は、実施例1と同様にして、熱可塑性エラストマー組成物及びそのシートを得た。このようにして得られた熱可塑性エラストマー組成物の特性の評価結果を表1に示す。
老化防止剤(アデカ社製の商品名「AO-50」)の使用量を0.879gから1.079gに変更し、かつ、前記ポリアミド12(宇部興産社製の商品名「UBESTA Polyamide12」、SP値:13.0)の使用量を100gから300gに変更した以外は、実施例1と同様にして、熱可塑性エラストマー組成物及びそのシートを得た。このようにして得られた熱可塑性エラストマー組成物の特性の評価結果を表1に示す。
α-オレフィン系樹脂であるエチレンプロピレン共重合体(EPM、SP値:7.9)を利用せず、老化防止剤(アデカ社製の商品名「AO-50」)の使用量を0.879gから0.803gに変更し、更に、前記ポリアミド12(SP値:13.0)100gを用いる代わりにエチレン-メチルアクリレート-無水マレイン酸共重合体(EMA:日本ポリエチレン社製の商品名「ET350X」、SP値:9.1、EMAとMEBMのSP値の差(絶対値):1.1)100gを用いた以外は、実施例1と同様にして、熱可塑性エラストマー組成物及びそのシートを得た。このようにして得られた熱可塑性エラストマー組成物の特性の評価結果を表1に示す。
α-オレフィン系樹脂であるエチレンプロピレン共重合体(EPM、SP値:7.9)を利用せず、老化防止剤(アデカ社製の商品名「AO-50」)の使用量を0.879gから0.903gに変更し、更に、前記ポリアミド12(SP値:13.0)100gを用いる代わりにエチレン-メチルアクリレート共重合体(EMA:日本ポリオレフィン社製の商品名「ET350X」、SP値:9.1、EMAとMEBMのSP値の差(絶対値):1.1)200gを用いた以外は、実施例1と同様にして、熱可塑性エラストマー組成物及びそのシートを得た。このようにして得られた熱可塑性エラストマー組成物の特性の評価結果を表1に示す。
有機化クレイの種類を株式会社ホージュン製の商品名「エスベンWX(有機化剤としてのアンモニウム塩の種類:ジメチルジオクタデシルアンモニウム及びジメチルステアリルベンジルアンモニウム(計2種))」から、株式会社ホージュン製の商品名「エスベンNO12S(有機化剤としてのアンモニウム塩の種類:オレイルビス(2-ヒドロキシエチル)メチルアンモニウム(計1種))」に変更し(使用量は0.1gで同じとした。)、かつ、前記ポリアミド12(宇部興産社製の商品名「UBESTA Polyamide12」、SP値:13.0)の使用量を100gから300gに変更した以外は、実施例1と同様にして、熱可塑性エラストマー組成物及びそのシートを得た。このようにして得られた熱可塑性エラストマー組成物の特性の評価結果を表1に示す。
α-オレフィン系樹脂であるエチレンプロピレン共重合体(EPM、SP値:7.9)を利用せず、かつ、前記ポリアミド12(宇部興産社製の商品名「UBESTA Polyamide12」、SP値:9.1)の使用量を100gから200gに変更した以外は、実施例1と同様にして、熱可塑性エラストマー組成物及びそのシートを得た。このようにして得られた熱可塑性エラストマー組成物の特性の評価結果を表1に示す。
α-オレフィン系樹脂であるエチレンプロピレン共重合体(EPM、SP値:7.9)を利用せず、老化防止剤(アデカ社製の商品名「AO-50」)の使用量を0.879gから0.979gに変更し、更に、前記ポリアミド12(宇部興産社製の商品名「UBESTA Polyamide12」、SP値:9.1)の使用量を100gから300gに変更した以外は、実施例1と同様にして、熱可塑性エラストマー組成物及びそのシートを得た。このようにして得られた熱可塑性エラストマー組成物の特性の評価結果を表1に示す。
老化防止剤(アデカ社製の商品名「AO-50」)の使用量を0.879gから0.979gに変更し、パラフィンオイルの種類を、JX日鉱日石エネルギー社(新社名「JXTGエネルギー株式会社」)製の商品名「スーパーオイルMシリーズ P500S」から出光興産株式会社製の商品名「ダイアナプロセスオイル PW380」に変更した(使用量は400gで同じとした。)以外は、実施例1と同様にして、熱可塑性エラストマー組成物及びそのシートを得た。このようにして得られた熱可塑性エラストマー組成物の特性の評価結果を表1に示す。なお、パラフィンオイル(出光興産株式会社製の商品名「ダイアナプロセスオイル PW380」)の動粘度は380mm2/sであり、Cp値は68.0%であり、アニリン点:143℃であった。
老化防止剤(アデカ社製の商品名「AO-50」)の使用量を0.879gから0.779gに変更し、かつ、有機化クレイの代わりに有機化されていないクレイ(クニミネ工業社製の商品名「クニピアF」)をそのまま用いた(使用量は0.1gで同じとした。)以外は、実施例1と同様にして、熱可塑性エラストマー組成物及びそのシートを得た。このようにして得られた熱可塑性エラストマー組成物の特性の評価結果を表1に示す。
老化防止剤(アデカ社製の商品名「AO-50」)の使用量を0.879gから0.779gに変更し、かつ、前記ポリアミド12(SP値:13.0)を利用しなかった以外は、実施例1と同様にして、熱可塑性エラストマー組成物及びそのシートを得た。このようにして得られた熱可塑性エラストマー組成物の特性の評価結果を表1に示す。
表1に示す結果からも明らかなように、エラストマー性ポリマー(無水マレイン酸変性エチレン-ブテン共重合体(SP値が8.0)とトリスヒドロキシエチルイソシアヌレートとの反応物:前記側鎖(iii)を主として有するエラストマー性ポリマー)とともに、有機化クレイと、SP値が13.0(かかるSP値はMEBMのSP値よりも5.0大きい。)であるポリマー(ポリアミド12(ナイロン))又はSP値が9.1(かかるSP値はMEBMのSP値よりも1.1大きい。)であるポリマー(EMA)とを含む組成物(実施例1~9)においては、100%モジュラスがいずれも0.46以上の値となっており、有機化クレイの代わりに有機化してないクレイを用いた場合(比較例1:100%モジュラスは0.42)及びSP値が9.0以上となるようなポリマーを用いていない場合(比較例2:100%モジュラスは0.42)と比較して、100%モジュラスがより高い値となることが分かった。なお、実施例5と実施例7とを対比すると、それらの組成は、SP値が9.0以上であり且つSP値がベースとなるエラストマー性ポリマーのSP値より0.5以上大きいポリマーの種類が異なるが(なお、老化防止剤の使用量の変化は微差であり、組成物の特性に大きく影響しないものと考えている。)、SP値が9.1であるポリマー(EMA)を用いた場合(実施例5)よりも、SP値が13.0であるポリマー(ポリアミド12(ナイロン))を用いた場合(実施例7)に、100%モジュラスがより高い値となることが分かった。また、実施例1~3、実施例4~5、実施例7~8の結果から、SP値が9.0以上であり且つSP値がエラストマー性ポリマーのSP値より0.5以上大きいポリマーの使用量がより増加するに従って、100%モジュラスがより高い値となることも分かった。更に、実施例3と実施例6とを比較すると、それらの組成は有機化クレイの種類において異なるが(なお、老化防止剤の使用量の変化は微差であり、組成物の特性に大きく影響しないものと考えている。)、ジメチルタイプのアンモニウム塩からなる有機化剤(ジメチルジオクタデシルアンモニウム、ジメチルステアリルベンジルアンモニウム)により有機化されたクレイを用いた場合(実施例3)に、他のアンモニウム塩からなる有機化剤(オレイルビス(2-ヒドロキシエチル)メチルアンモニウム)を用いた場合(実施例6)よりも、100%モジュラスがより高い値となることが分かった。
α-オレフィン系樹脂であるエチレンプロピレン共重合体(EPM、SP値:7.9)を利用せず、トリスヒドロキシエチルイソシアヌレートを2.62g用いる代わりにペンタエリスリトール(東京化成工業社製)を1.02g用い、老化防止剤(アデカ社製の商品名「AO-50」)の使用量を0.879gから4.00gに変更し、スチレンブロック共重合体の使用量を200gから300gに変更し、パラフィンオイルとしてJX日鉱日石エネルギー社(新社名「JXTGエネルギー株式会社」)製の商品名「スーパーオイルMシリーズ P500S」を400g用いる代わりにSKオイル社製の商品名「YU-8J」を600g用い、かつ、ポリアミド12の使用量を100gから300gに変更した以外は、実施例1と同様にして、熱可塑性エラストマー組成物及びそのシートを得た。このようにして得られた熱可塑性エラストマー組成物の特性の評価結果を表2に示す。
ポリアミド12を300g使用する代わりに、α-オレフィン系樹脂であるポリエチレン(高密度ポリエチレン(HDPE):日本ポリエチレン製の商品名「HJ590N」、SP値:7.9)を300g用いた以外は、実施例10と同様にして熱可塑性エラストマー組成物及びそのシートを得た。このようにして得られた熱可塑性エラストマー組成物の特性の評価結果を表2に示す。
有機化クレイの種類を株式会社ホージュン製の商品名「エスベンWX」から、株式会社ホージュン製の商品名「エスベンNO12S」に変更し(使用量は0.1gで同じとした。)、老化防止剤(アデカ社製の商品名「AO-50」)の使用量を4.00gから4.81gに変更し、かつ、ポリアミド12の使用量を300gから600gに変更した以外は、実施例10と同様にして熱可塑性エラストマー組成物及びそのシートを得た。このようにして得られた熱可塑性エラストマー組成物の特性の評価結果を表2に示す。
ポリアミド12を600g使用する代わりに、α-オレフィン系樹脂であるポリエチレン(高密度ポリエチレン(HDPE):日本ポリエチレン製の商品名「HJ590N」、SP値:7.9)を600g用いた以外は、実施例11と同様にして熱可塑性エラストマー組成物及びそのシートを得た。このようにして得られた熱可塑性エラストマー組成物の特性の評価結果を表2に示す。
α-オレフィン系樹脂であるエチレンプロピレン共重合体(EPM、SP値:7.9)を利用せず、トリスヒドロキシエチルイソシアヌレートを2.62g用いる代わりに2,4-ジアミノ-6-フェニル-1,3,5-トリアジン(東京化成工業社製)を2.82g用い、老化防止剤(アデカ社製の商品名「AO-50」)の使用量を0.879gから4.00gに変更し、スチレンブロック共重合体の使用量を100gから300gに変更し、パラフィンオイルとしてJX日鉱日石エネルギー社(新社名「JXTGエネルギー株式会社」)製の商品名「スーパーオイルMシリーズ P500S」を400g用いる代わりにSKオイル社製の商品名「YU-8J」を600g用い、かつ、ポリアミド12の使用量を100gから300gに変更した以外は、実施例1と同様にして、熱可塑性エラストマー組成物及びそのシートを得た。このようにして得られた熱可塑性エラストマー組成物の特性の評価結果を表2に示す。
ポリアミド12を300g使用する代わりに、α-オレフィン系樹脂であるポリエチレン(高密度ポリエチレン(HDPE):日本ポリエチレン製の商品名「HJ590N」、SP値:7.9)を300g用いた以外は、実施例12と同様にして熱可塑性エラストマー組成物及びそのシートを得た。このようにして得られた熱可塑性エラストマー組成物の特性の評価結果を表2に示す。
有機化クレイの種類を株式会社ホージュン製の商品名「エスベンWX」から、株式会社ホージュン製の商品名「エスベンNO12S」に変更し(使用量は0.1gで同じとした。)、老化防止剤(アデカ社製の商品名「AO-50」)の使用量を4.00gから4.81gに変更し、かつ、ポリアミド12の使用量を300gから600gに変更した以外は、実施例12と同様にして熱可塑性エラストマー組成物及びそのシートを得た。このようにして得られた熱可塑性エラストマー組成物の特性の評価結果を表2に示す。
ポリアミド12を600g使用する代わりに、α-オレフィン系樹脂であるポリエチレン(高密度ポリエチレン(HDPE):日本ポリエチレン製の商品名「HJ590N」、SP値:7.9)を600g用いた以外は、実施例13と同様にして熱可塑性エラストマー組成物及びそのシートを得た。このようにして得られた熱可塑性エラストマー組成物の特性の評価結果を表2に示す。
α-オレフィン系樹脂であるエチレンプロピレン共重合体(EPM、SP値:7.9)を利用せず、老化防止剤(アデカ社製の商品名「AO-50」)の使用量を0.879gから4.00gに変更し、スチレンブロック共重合体の使用量を200gから300gに変更し、パラフィンオイルとしてJX日鉱日石エネルギー社(新社名「JXTGエネルギー株式会社」)製の商品名「スーパーオイルMシリーズ P500S」を400g用いる代わりにSKオイル社製の商品名「YU-8J」を600g用い、かつ、ポリアミド12の使用量を100gから300gに変更した以外は、実施例1と同様にして、熱可塑性エラストマー組成物及びそのシートを得た。このようにして得られた熱可塑性エラストマー組成物の特性の評価結果を表2に示す。
ポリアミド12を300g使用する代わりに、α-オレフィン系樹脂であるポリエチレン(高密度ポリエチレン(HDPE):日本ポリエチレン製の商品名「HJ590N」、SP値:7.9)を300g用いた以外は、実施例14と同様にして熱可塑性エラストマー組成物及びそのシートを得た。このようにして得られた熱可塑性エラストマー組成物の特性の評価結果を表2に示す。
有機化クレイの種類を株式会社ホージュン製の商品名「エスベンWX」から、株式会社ホージュン製の商品名「エスベンNO12S」に変更し(使用量は0.1gで同じとした。)、老化防止剤(アデカ社製の商品名「AO-50」)の使用量を4.00gから4.81gに変更し、かつ、ポリアミド12の使用量を300gから600gに変更した以外は、実施例14と同様にして熱可塑性エラストマー組成物及びそのシートを得た。このようにして得られた熱可塑性エラストマー組成物の特性の評価結果を表2に示す。
ポリアミド12を300g使用する代わりに、α-オレフィン系樹脂であるポリエチレン(高密度ポリエチレン(HDPE):日本ポリエチレン製の商品名「HJ590N」、SP値:7.9)を300g用いた以外は、実施例14と同様にして熱可塑性エラストマー組成物及びそのシートを得た。このようにして得られた熱可塑性エラストマー組成物の特性の評価結果を表2に示す。
表2に示す結果からも明らかなように、SP値が13.0であるポリマー(ポリアミド12)を含む組成物と、SP値が13.0であるポリマー(ポリアミド12)の代わりにSP値が7.9であるポリマー(ポリエチレン)を含む組成物とを、これらのポリマー以外の組成が同一でありかつ組成物の総量が同じ量となる実施例と比較例同士(実施例10と比較例3同士、実施例11と比較例4同士、実施例12と比較例5同士、実施例13と比較例6同士、実施例14と比較例7同士、実施例15と比較例8同士)でそれぞれ対比すると、SP値が13.0であるポリマー(ポリアミド12)を含む組成物(各実施例)の方が100%モジュラス及び破断強度がより高い値となるとともに、ヘキサンに対する膨潤度及びオイル(JIS#3オイル)に対する膨潤度がいずれもより低い値となることが確認された。このような結果から、エラストマー性ポリマー(無水マレイン酸変性エチレン-ブテン共重合体(SP値が8.0)と、ペンタエリスリトール、2,4-ジアミノ-6-フェニル-1,3,5-トリアジン又はトリスヒドロキシエチルイソシアヌレートとの反応物)とともに、SP値が9.0以上であり且つSP値がエラストマー性ポリマーのSP値より0.5以上大きいポリマーと、有機化クレイとを組み合わせて利用した場合(実施例10~15)には、100%モジュラス及び破断強度を指標とした引張強度がより高度なものとなるとともに、ヘキサンに対する膨潤度及びオイル(JIS#3オイル)に対する膨潤度を指標とする耐油性がより向上すること(膨潤度がより低下すること)が分かった。このように、実施例10~15で得られた熱可塑性エラストマー組成物及びその成形体(シート)は、より高度な引張強度と、より高度な耐油性とを有するものとなることが確認された。
Claims (12)
- カルボニル含有基および/または含窒素複素環を有する水素結合性架橋部位を含有する側鎖を有しかつガラス転移点が25℃以下であるエラストマー性ポリマー(A)、並びに、側鎖に水素結合性架橋部位及び共有結合性架橋部位が含有されておりかつガラス転移点が25℃以下であるエラストマー性ポリマー(B)からなる群から選択される少なくとも1種のエラストマー成分と、
前記エラストマー成分100質量部に対して20質量部以下の含有比率の有機化クレイと、
前記エラストマー性ポリマー(A)及び(B)以外のポリマーであり、SP値が9.0以上であり、かつ、前記エラストマー成分のSP値よりも0.5以上大きな値のSP値を有するポリマー(Z)と、
を含有してなる、熱可塑性エラストマー組成物。 - 前記ポリマー(Z)のSP値が9.0~16.0である請求項1に記載の熱可塑性エラストマー組成物。
- 前記ポリマー(Z)が、エラストマー成分に対する反応性官能基を有する請求項1又は2に記載の熱可塑性エラストマー組成物。
- 前記反応性官能基が水酸基、アミノ基、イミノ基、エステル基、酸無水物基及びカルボキシ基のうちの少なくとも1種である請求項3に記載の熱可塑性エラストマー組成物。
- 前記エラストマー成分として含まれるポリマーの主鎖が、ジエン系ゴム、ジエン系ゴムの水素添加物、オレフィン系ゴム、水添されていてもよいポリスチレン系エラストマー性ポリマー、ポリオレフィン系エラストマー性ポリマー、ポリ塩化ビニル系エラストマー性ポリマー、ポリウレタン系エラストマー性ポリマー、ポリエステル系エラストマー性ポリマー、及び、ポリアミド系エラストマー性ポリマーの中から選択される少なくとも1種からなる請求項1~4のうちのいずれか一項に記載の熱可塑性エラストマー組成物。
- 前記エラストマー成分が、無水マレイン酸変性エラストマー性ポリマーと、水酸基、チオール基及びアミノ基のうちの少なくとも1種の置換基を有していてもよいトリアゾール、水酸基、チオール基及びアミノ基のうちの少なくとも1種の置換基を有していてもよいピリジン、水酸基、チオール基及びアミノ基のうちの少なくとも1種の置換基を有していてもよいチアジアゾール、水酸基、チオール基及びアミノ基のうちの少なくとも1種の置換基を有していてもよいイミダゾール、水酸基、チオール基及びアミノ基のうちの少なくとも1種の置換基を有していてもよいイソシアヌレート、水酸基、チオール基及びアミノ基のうちの少なくとも1種の置換基を有していてもよいトリアジン、水酸基、チオール基及びアミノ基のうちの少なくとも1種の置換基を有していてもよいヒダントイン、トリスヒドロキシエチルイソシアヌレート、スルファミド、ペンタエリスリトール、2,4-ジアミノ-6-フェニル-1,3,5-トリアジン、並びに、ポリエーテルポリオールのうちの少なくとも1種の化合物との反応物からなる群から選択される少なくとも1種である請求項1~5のうちのいずれか一項に記載の熱可塑性エラストマー組成物。
- 環状酸無水物基を側鎖に有するエラストマー性ポリマー(D)と、
有機化クレイと、
SP値が9.0以上であり、かつ、前記エラストマー性ポリマー(D)のSP値よりも0.5以上大きな値のSP値を有するポリマー(Z)と、
を混合して混合物を得る第一工程と、
前記混合物に、前記環状酸無水物基と反応して水素結合性架橋部位を形成する化合物(I)、並びに、前記化合物(I)及び前記環状酸無水物基と反応して共有結合性架橋部位を形成する化合物(II)の混合原料のうちの少なくとも1種の原料化合物を、前記環状酸無水物基を側鎖に有するエラストマー性ポリマー(D)100質量部に対して0.1~10質量部の割合で添加し、前記エラストマー性ポリマー(D)と前記原料化合物とを反応させることにより、熱可塑性エラストマー組成物を得る第二工程と、
を含むこと、
前記第二工程において得られる前記熱可塑性エラストマー組成物が、カルボニル含有基および/または含窒素複素環を有する水素結合性架橋部位を含有する側鎖を有しかつガラス転移点が25℃以下であるエラストマー性ポリマー(A)、並びに、側鎖に水素結合性架橋部位及び共有結合性架橋部位が含有されておりかつガラス転移点が25℃以下であるエラストマー性ポリマー(B)からなる群から選択される少なくとも1種のエラストマー成分と、
前記エラストマー成分100質量部に対して20質量部以下の含有比率の有機化クレイと、
前記エラストマー性ポリマー(A)及び(B)以外のポリマーであり、SP値が9.0以上であり、かつ、前記エラストマー成分のSP値よりも0.5以上大きな値のSP値を有するポリマー(Z)と、
を含有してなる組成物であること、及び、
前記第一工程において、前記熱可塑性エラストマー組成物中の前記有機化クレイの含有量が前記エラストマー成分100質量部に対して20質量部以下となるような割合で前記有機化クレイを用いて、前記エラストマー性ポリマー(D)と、前記有機化クレイと、前記ポリマー(Z)とを混合する、熱可塑性エラストマー組成物の製造方法。 - 前記エラストマー性ポリマー(D)が無水マレイン酸変性エラストマー性ポリマーであり、
前記エラストマー成分が、無水マレイン酸変性エラストマー性ポリマーと、水酸基、チオール基及びアミノ基のうちの少なくとも1種の置換基を有していてもよいトリアゾール、水酸基、チオール基及びアミノ基のうちの少なくとも1種の置換基を有していてもよいピリジン、水酸基、チオール基及びアミノ基のうちの少なくとも1種の置換基を有していてもよいチアジアゾール、水酸基、チオール基及びアミノ基のうちの少なくとも1種の置換基を有していてもよいイミダゾール、水酸基、チオール基及びアミノ基のうちの少なくとも1種の置換基を有していてもよいイソシアヌレート、水酸基、チオール基及びアミノ基のうちの少なくとも1種の置換基を有していてもよいトリアジン、水酸基、チオール基及びアミノ基のうちの少なくとも1種の置換基を有していてもよいヒダントイン、トリスヒドロキシエチルイソシアヌレート、スルファミド、ペンタエリスリトール、2,4-ジアミノ-6-フェニル-1,3,5-トリアジン、並びに、ポリエーテルポリオールのうちの少なくとも1種の化合物との反応物からなる群から選択される少なくとも1種である請求項7に記載の熱可塑性エラストマー組成物の製造方法。 - 請求項1~6のうちのいずれか一項に記載の熱可塑性エラストマー組成物を成形してなる、エラストマー成形体。
- 土木・建築材、工業部品、電気・電子部品及び日用品からなる群から選択されるいずれかの用途に利用するための成形体である請求項9に記載のエラストマー成形体。
- 自動車部品、隙間埋め材、建築用シール材、管継ぎ手用シール材、配管プロテクト材、配線プロテクト材、断熱材、パッキン材、緩衝材、電気絶縁体、コンタクトラバーシート、スポーツ・レジャー用品及び雑貨からなる群から選択される1つの用途に利用するための成形体である請求項9に記載のエラストマー成形体。
- 自動車エンジン用パッキン、等速ジョイントブーツ、ウェザーストリップ、ダンパー、ワイパーブレード、絶縁カバー及びフードシールゴムからなる群から選択される1つの用途に利用するための成形体である請求項9に記載のエラストマー成形体。
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