WO2016158205A1 - 熱可塑性エラストマー組成物及びその製造方法 - Google Patents
熱可塑性エラストマー組成物及びその製造方法 Download PDFInfo
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Definitions
- the present invention relates to a thermoplastic elastomer composition and a method for producing the same.
- Cross-linked rubber (vulcanized rubber) has a stable three-dimensional network structure in which a polymer substance and a cross-linking agent (vulcanizing agent) are covalently bonded, and exhibits very high strength. Reforming is difficult.
- a thermoplastic elastomer utilizes physical cross-linking and can be easily molded by heating and melting without requiring a complicated vulcanization / molding process including pre-molding.
- thermoplastic elastomer includes a resin component and a crosslinked rubber component. At normal temperature, the resin component is crystallized to prevent plastic deformation, and at elevated temperature, the resin component is plastically deformed by softening or melting. Thermoplastic elastomers are known. However, since such a thermoplastic elastomer contains a resin component, the rubber elasticity is likely to be lowered, and it is not always sufficient in terms of mechanical strength such as tensile strength.
- thermoplastic elastomers development of materials having excellent physical properties such as mechanical strength, particularly tensile strength, has been promoted.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2006-131663
- a thermoplastic elastomer composed of an elastomeric polymer having a chain and a glass transition point of 25 ° C. or lower is disclosed.
- Such a thermoplastic elastomer described in Patent Document 1 has a sufficiently high tensile strength, and its industrial utility value and environmental protection value are high.
- thermoplastic elastomer in the field of such a thermoplastic elastomer, it has a higher tensile stress than the thermoplastic elastomer described in Patent Document 1, and has a heat resistance based on a 5% weight loss temperature or the like.
- thermoplastic elastomer compositions that can be made sufficiently advanced is desired.
- thermoplastic elastomer composition capable of having a sufficiently high tensile stress and a sufficiently high heat resistance, and a method for producing the same. The purpose is to provide.
- thermoplastic elastomer composition is a side chain containing a hydrogen-bonding crosslinking site having a carbonyl-containing group and / or a nitrogen-containing heterocyclic ring (a ) And a glass transition point of 25 ° C. or lower, and a side chain contains a hydrogen-bonding cross-linked site and a covalent bond cross-linking site and has a glass transition point of 25 ° C. or lower.
- thermoplastic elastomer composition of the present invention has a side chain (a) containing a hydrogen-bonding crosslinking site having a carbonyl-containing group and / or a nitrogen-containing heterocyclic ring, and has a glass transition point of 25 ° C. or lower.
- a side chain containing a hydrogen-bonding crosslinking site having a carbonyl-containing group and / or a nitrogen-containing heterocyclic ring, and has a glass transition point of 25 ° C. or lower.
- At least one elastomer component, With clay The clay content is 20 parts by mass or less with respect to 100 parts by mass of the elastomer component.
- the hydrogen-bonding cross-linking site contained in the side chain of the elastomeric polymer (B) has hydrogen bondability having a carbonyl-containing group and / or a nitrogen-containing heterocycle. It is preferably a crosslinking site, more preferably a hydrogen bonding crosslinking site having a carbonyl-containing group and a nitrogen-containing heterocycle.
- the clay is preferably at least one selected from the group consisting of clays containing silicon and magnesium as main components, and organic clays, More preferred is clay.
- the crosslinking at the covalent crosslinking site contained in the side chain of the elastomeric polymer (B) is amide, ester, lactone, urethane, ether, thiourethane. And at least one bond selected from the group consisting of thioethers.
- thermoplastic elastomer composition of the present invention the hydrogen-bonding cross-linked site of the side chain (a) is represented by the following general formula (1):
- A is a nitrogen-containing heterocyclic ring
- B is 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.
- R ′ is a hydrogen atom or an alkyl group having 1 to 10 carbon atoms
- a sulfur atom Or an organic group that may contain these atoms or groups.
- A is a nitrogen-containing heterocyclic ring. It is more preferable to contain the structural part represented by these.
- the nitrogen-containing heterocycle is preferably a 5-membered ring and / or a 6-membered ring.
- the nitrogen-containing heterocycle is at least one selected from a triazole ring, a thiadiazole ring, a pyridine ring, an imidazole ring, a triazine ring, an isocyanurate ring, and a hydantoin ring. It is preferable that
- the covalent crosslinking site contained in the side chain of the elastomeric polymer (B) is crosslinked with a cyclic acid anhydride group, a hydroxyl group or an amino group, and It is preferably formed by reaction with an imino group.
- the main chains of the elastomeric polymers (A) to (B) are respectively diene rubber, hydrogenated diene rubber, olefin rubber, and hydrogenated.
- 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 Hydrazine, trishydroxyethyl isocyanurate, sulfamide, which may have at least one substituent selected from lyazine, hydroxyl group, thiol group and amino group, and at least one compound of polyether polyol At least one selected from the group consisting of reactants, and
- the clay is preferably an organized clay.
- the method for producing the thermoplastic elastomer composition of the present invention includes a first step of obtaining a mixture by mixing clay in an elastomeric polymer having a cyclic acid anhydride group in the side chain; 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
- a second step of obtaining a thermoplastic elastomer composition by adding at least one raw material compound among the mixed raw materials of the compound (II) that forms the compound, and reacting the polymer and the raw material compound; Including
- the thermoplastic elastomer composition has an elastomeric polymer (a) having a side chain (a) 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
- the elastomeric polymer having a cyclic acid anhydride group in the side chain is preferably a maleic anhydride-modified elastomeric polymer.
- the compound (I) and / or (II) reacts with the cyclic acid anhydride group to react with a hydrogen bond crosslinking site and a covalent bond. It is preferable to use a compound that forms both sites.
- a compound that forms both such a hydrogen bonding crosslinking site and a covalent crosslinking site by reacting with an elastomeric polymer having a cyclic acid anhydride group in the side chain, more efficiently, It becomes possible to form both the hydrogen bond crosslinking site and the covalent bond crosslinking site at the same time, and the elastomeric polymer (B) tends to be efficiently generated.
- the elastomeric polymer having the cyclic acid anhydride group in the side chain is a maleic anhydride-modified elastomeric polymer
- the raw material compound has at least one substituent selected from triazole, hydroxyl group, thiol group and amino group which may have at least one substituent selected from hydroxyl group, thiol group and amino group. It may have at least one substituent selected from pyridine, hydroxyl group, thiol group and amino group, and at least one substituent selected from thiadiazole, hydroxyl group, thiol group and amino group.
- the elastomer component is at least one selected from the group consisting of a reaction product of the maleic anhydride-modified elastomeric polymer and the raw material compound; and
- the clay is preferably an organized clay.
- thermoplastic elastomer composition of the present invention is not necessarily clear, but the present inventors speculate as follows. That is, first, in the present invention, clay is contained together with the elastomer component. By such a clay, the elastomer component is surface-crosslinked, and the tensile stress is sufficiently improved. Considering this point more specifically, the elastomer component contains an elastomeric polymer including at least a side chain having a hydrogen bonding cross-linking site, and hydrogen bonding at the hydrogen bonding cross-linking site of the side chain is Interact with clay. Therefore, in the present invention, clay is uniformly dispersed in the elastomer component.
- the hydrogen-bonding cross-linking site is “a hydrogen-bonding cross-linking site having a carbonyl-containing group and / or a nitrogen-containing heterocycle (more preferably, a carbonyl-containing group and a nitrogen-containing heterocycle).
- Hydrogen bonding cross-linkable sites it is possible to bond hydrogen at more points, and in addition to hydrogen bonding at more points between elastomers, there are more hydrogen bonds with clay. Since hydrogen bonding occurs at a point, it is possible to cross-link the surface more strongly, and a higher effect tends to be obtained in terms of tensile strength and heat resistance.
- the clay content is 20 parts by mass or less with respect to 100 parts by mass of the elastomer component, but even with such a content ratio, as described above, the clay is sufficient. It is possible to form a sufficient amount of surface crosslinks (if the ratio of dispersion in a single layer is increased, more surface crosslinks are formed in the elastomer).
- the present inventors infer that it is possible to exhibit a sufficiently high tensile stress and a sufficiently high heat resistance.
- fluidity (formability) is maintained by, for example, hydrogen bonds formed by hydrogen bond cross-linking sites in the side chain, together with sufficiently high tensile stress and sufficiently high heat resistance. Is possible.
- At least one of the elastomeric polymers (A) and (B) having a hydrogen bonding cross-linked site in the side chain is used as the elastomer component.
- the present inventors infer as follows. That is, first, a general thermoplastic elastomer is a type that uses pseudo-crosslinking due to physical interaction between polymer molecular chains (physical weak bonds are formed by interaction due to intermolecular forces of the polymer, etc.).
- thermoplastic elastomers using pseudo-crosslinking include soft segments and hard segments such as block polymers and urethane elastomers such as hydrogenated styrene-based thermoplastic elastomers (SEBS).
- SEBS hydrogenated styrene-based thermoplastic elastomers
- SEBS will be described as an example.
- SEBS expresses mechanical strength by the interaction of styrene parts. Therefore, when a filler such as clay is added to SEBS as it is without introducing the side chain as described above, the interaction of the styrene part is inhibited, and the mechanical strength of the polymer is lowered, and the actual use is reduced. It will be unbearable.
- thermoplastic elastomers of a type using pseudo-crosslinking when a thermoplastic elastomer of a type using pseudo-crosslinking is combined with clay, formation of pseudo-crosslinking is inhibited in the composition, and the mechanical strength (tensile stress, etc.) of the composition is inhibited. ) Will decrease.
- fillers such as clay are only introduced into the matrix phase and are uniformly blended throughout the composition. Difficult to do.
- At least one selected from the group consisting of the elastomeric polymers (A) and (B) is used as an elastomer component, and a predetermined amount of clay is combined with the elastomer polymer. It is possible to exhibit excellent tensile stress and sufficiently high heat resistance.
- thermoplastic elastomer composition capable of having a sufficiently high tensile stress and a sufficiently high heat resistance, and a method for producing the same.
- FIG. 2 is an electron micrograph (TEM photograph) showing the state of the surface of the thermoplastic elastomer composition obtained in Example 1.
- FIG. 4 is an electron micrograph (TEM photograph) showing the surface state of the thermoplastic elastomer composition obtained in Example 2.
- FIG. 2 is an electron micrograph (TEM photograph) showing the state of the surface of the thermoplastic elastomer composition obtained in Example 11.
- FIG. It is an electron micrograph (TEM photograph) which shows the state of the surface of the thermoplastic elastomer composition obtained in Example 16.
- It is an electron micrograph (TEM photograph) which shows the state of the surface of the thermoplastic elastomer composition obtained in Example 17.
- thermoplastic elastomer composition has an elastomeric property having a side chain (a) 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. At least selected from the group consisting of a polymer (A) and 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.
- One elastomer component; With clay The clay content is 20 parts by mass or less with respect to 100 parts by mass of the elastomer component.
- each component contained in the thermoplastic elastomer composition of the present invention will be described separately.
- 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.
- the “side chain (a) containing a hydrogen-bonding cross-linked site having a carbonyl-containing group and / or a nitrogen-containing heterocycle” refers to an atom (usually a carbon atom) that forms the main chain of the elastomeric polymer.
- 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). )) And a side chain having a covalent crosslinking site (hereinafter, sometimes referred to as “side chain (b)” for the sake of convenience), the side chain of the polymer contains a hydrogen bonding crosslinking site.
- side chains including both cross-linked sites are sometimes referred to as “side chains (c)”.
- side chains (c) A concept that includes the case where both binding crosslink sites are contained. is there.
- Such an elastomeric polymer (A) to (B) main chain is generally a known natural polymer or synthetic polymer, and has a glass transition point at room temperature ( 25 ° C.) or lower polymer (so long as it is made of so-called elastomer), it is not particularly limited.
- 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), 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; Silico Rubber, urethane rubber, and the like.
- NR natural rubber
- IR isoprene rubber
- BR butadiene rubber
- SBR 1, 2-
- the main chain of the elastomeric polymers (A) to (B) may be composed of 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, polyvinyl chloride-based elastomeric polymer
- polyurethane-based elastomeric polymer polyester-based elastomeric polymer
- polyamide-based elastomeric polymer Etc polyamide-based elastomeric polymer Etc.
- the main chain of such elastomeric polymers (A) to (B) includes diene rubber, hydrogenated diene rubber, olefin rubber, hydrogenated polystyrene elastomeric polymer, polyolefin At least one selected from an elastomeric polymer, a polyvinyl chloride-based elastomeric polymer, a polyurethane-based elastomeric polymer, a polyester-based elastomeric polymer, and a polyamide-based elastomeric polymer is preferable.
- a hydrogenated diene rubber or an olefin rubber is preferable as the main chain of the elastomeric polymers (A) to (B).
- a diene rubber is preferable as the main chain of the elastomeric polymers (A) to (B).
- 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 such elastomeric polymers (A) to (B) has a glass transition point of 25 ° C. or less for the elastomeric polymers (A) to (B), and a molded product comprising the resulting thermoplastic elastomer composition is obtained.
- Natural rubber isoprene rubber (IR), butadiene rubber (BR), 1,2-butadiene rubber, styrene-butadiene rubber (SBR), ethylene-propylene because it exhibits rubber-like elasticity at room temperature (25 ° C) -Diene rubbers such as diene rubber (EPDM) and butyl rubber (IIR); and olefin rubbers such as ethylene-propylene rubber (EPM), ethylene-acrylic rubber (AEM), and ethylene-butene rubber (EBM).
- 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.
- 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) 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 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 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 a 6 to 20 carbon 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 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 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 an amino group NR ′ (R ′ is a hydrogen atom or an alkyl group having 1 to 10 carbon atoms).
- the alkyl group having 1 to 10 carbon atoms of the amino group NR ′ includes methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, including isomers.
- an oxygen atom such as an aralkylene ether group, an aralkylene amino group, an aralkylene thioether group, an amino group NR ′ and a sulfur atom are combined with an adjacent carbonyl group to form a conjugated ester group, amide group, imide group, It is preferable to form a thioester group or the like.
- 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 between the carbonyl-containing group and the nitrogen-containing heterocycle of the thermoplastic elastomer is not particularly limited, and 2: 1 is preferable because it tends to form a complementary interaction and can be easily produced. .
- 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 that forms the hydrogen bond becomes a hydrogen-bonding crosslinking site.
- 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.
- a functional group capable of generating at least one bond selected from the group consisting of thioethers, and preferred examples of such functional groups include cyclic acid anhydride groups, hydroxyl groups, amino groups, carboxy groups, isocyanate groups, and thiol groups. Is exemplified.
- 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 causing at least one bond selected from the group consisting of amide, ester, lactone, urethane, thiourethane and thioether, and such functional group includes a cyclic acid anhydride.
- Preferred examples include a 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 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)). Further, G in the formula is preferably an isocyanurate group (isocyanurate ring) from the viewpoint of high heat resistance and high strength due to hydrogen bonding.
- 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 formula (4).
- 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).
- the at least one elastomer component selected from the group consisting of such elastomeric polymers (A) and (B) includes a maleic anhydride-modified elastomeric polymer and a hydroxyl group, a thiol group, and an amino group.
- hydroxyl group, thiol group and amino group optionally having at least one substituent selected from triazole, hydroxyl group, thiol group and amino group optionally having at least one substituent Of the thiadiazole, hydroxyl group, thiol group and amino group optionally having at least one substituent, of imidazole, hydroxyl group, thiol group and amino group optionally having at least one substituent Of isocyanurate, hydroxyl group, thiol group and amino group which may have at least one substituent A triazine optionally having at least one substituent, a hydantoin optionally having at least one substituent selected from a hydroxyl group, a thiol group and an amino group, trishydroxyethyl isocyanurate, sulfamide, and
- the polyether polyol is at least one selected from the group consisting of reactants with at least one compound.
- the maleic anhydride-modified elastomeric polymer is not particularly limited.
- Known maleic anhydride-modified elastomeric polymers such as polyethylene and maleic anhydride-modified polypropylene can be exemplified.
- 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.
- elastomeric polymers (A) to (B) for example, an elastomeric polymer having a functional group (for example, a cyclic acid anhydride group) in the side chain is used, and the elastomeric polymer is used.
- 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 An elastomeric polymer having the side chain (a ′) and side chain (b) by reacting with at least one raw material compound among the mixed raw materials of the compound forming the site; And / or a method of 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 above-mentioned clay is first used in the production of the elastomer component (elastomeric polymers (A) to (B)). It is preferable to prepare the composition simultaneously with the preparation of the elastomer component by adopting the method of addition. Moreover, as a method of adding such clay in advance, it is more preferable to employ the method for producing a thermoplastic elastomer composition of the present invention described later.
- the clay according to the present invention is not particularly limited, and a known clay (viscous mineral or the like) can be appropriately used. Examples of such clay include natural clay, synthetic clay, and organic clay.
- clays at least one selected from the group consisting of clays mainly composed of silicon and magnesium and organic clays is preferable.
- the clay mainly composed of silicon and magnesium refers to a clay in which the metal main component of the metal oxide, which is a constituent component of clay, is silicon (Si) and magnesium (Mg). Metal oxides (aluminum (Al), iron (Fe), etc.) may be included as subcomponents.
- the clay containing silicon and magnesium as main components is not particularly limited, and a known clay can be appropriately used. By using clay mainly composed of silicon and magnesium, the particle size is small, so that the reinforcing property can be enhanced.
- the clay which has such a silicon and magnesium as a main component the clay which has a smectite structure from a viewpoint of availability is preferable.
- Examples of the clay mainly composed of silicon and magnesium include stevensite, hectorite, saponite, and talc. It is more preferable to use light or saponite.
- the clay mainly composed of silicon and magnesium synthetic clay is preferable.
- synthetic clay commercially available ones may be used.
- trade names “Smecton SA” and “Smecton ST” manufactured by Kunimine Industry Co., Ltd. trade names “Ionite” manufactured by Mizusawa Chemical Industry Co., Ltd., Corp.
- a trade name “Lucentite” manufactured by Chemical Co., Ltd. can be used as appropriate.
- the organic clay is not particularly limited, but it is preferable that the clay is made organic by an organic agent.
- Such clay before being organized is not particularly limited and may be a so-called clay mineral, for example, montmorillonite, saponite, hectorite, beidellite, stevensite, nontronite, vermiculite, halloysite, mica, Fluorinated mica, kaolinite, pyrophyllolite and the like can be mentioned.
- Such clay may be a natural product or a synthetic product.
- the organic agent is not particularly limited, and a known organic agent capable of organicizing clay can be appropriately used.
- a quaternary ammonium salt of clay can be preferably used from the viewpoint of monolayer dispersibility.
- the quaternary ammonium salt of such an organized clay is not particularly limited.
- trimethyl stearyl ammonium salt, oleyl bis (2-hydroxylethyl) salt, methyl ammonium salt, dimethyl stearyl benzyl ammonium salt, dimethyl octadecyl ammonium salt , And 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.
- clays and organoclays mainly composed of silicon and magnesium are preferable, and among them, higher tensile stress (modulus) can be obtained. It is particularly preferable to use an organized clay.
- thermoplastic elastomer composition of the present invention contains the elastomer component and the clay.
- the elastomer component comprises an elastomeric polymer containing at least a side chain having a hydrogen-bonding cross-linking site (on 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 clay interacts with the hydrogen-bonding cross-linked site (for example, a new hydrogen bond is formed), and the elastomer component is surfaced using the surface of the clay.
- Cross-linked when such surface cross-linking is formed, it becomes possible to suppress the stress concentration at the cross-linking point, it is possible to express a very high tensile strength, and sufficiently derived from the structure
- fluidity can be maintained by hydrogen bonds formed by hydrogen-bonding cross-linked sites in the side chain. Further, depending on the composition, higher mechanical strength, sufficient self-repairability, and the like can be exhibited together.
- the side chain containing the covalently crosslinked site is used for rubber.
- the fluidity of molecular chains can be controlled. Therefore, when an elastomer component (for example, an elastomeric polymer (B)) containing a covalent cross-linking site in the side chain is used, it is possible to develop compression set resistance at a higher level.
- the present inventors infer that.
- 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 hydrogen bond and a covalent bond site, the flow of the covalent bond is suppressed during use (improving mechanical strength), and the hydrogen bond is used. It is also possible to simultaneously develop fluidity (formability) due to cleavage during heating. 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 contains the elastomer component and the clay, and the clay content is 20 parts by mass or less with respect to 100 parts by mass of the elastomer component. .
- the clay content 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 clay content is less than the lower limit, the clay content tends to be too low to obtain a sufficient effect, whereas if the upper limit is exceeded, the crosslinking becomes too strong, and the elongation and strength are rather high. However, it tends to be difficult to use in various applications (practicality is reduced).
- clay in a single layer form is present in the composition. 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 clay is based on the number of single clays. It is preferable to exist as 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. By calculating the number and the number of multi-layered clays, and calculating the abundance (ratio) of single-layer clay among all the clays for each measurement point (each TEM image) based on the number. Can be sought.
- a transmission electron microscope for example, trade name “JEM-2010” manufactured by JEOL Ltd.
- the interlayer distance of montmorillonite is about 9.8 ⁇
- the interlayer distance of general organic clay is about 20 to 40 ⁇ (2 to 4 nm). is there.
- 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 clay in a single layer state is contained at the above-described ratio, whereby the clay is further dispersed and the mechanical strength can be improved efficiently.
- the method for containing the single-layered clay in the above-described proportion (existence ratio) is not particularly limited, but the method for producing the thermoplastic elastomer composition of the present invention to be 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, more preferably 5 to 50) particles are 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.
- thermoplastic elastomer composition of the present invention is a thermoplastic elastomer composition containing an elastomeric polymer (A) as an elastomer component
- the composition can be imparted with the characteristics derived from the side chain (a). In particular, the elongation at break, strength at break, and fluidity can be improved.
- thermoplastic elastomer compositions containing an elastomeric polymer (B) as an elastomer component it is possible to impart properties derived from covalent cross-linking sites in the side chain to the composition. It becomes possible to make it.
- thermoplastic elastomer composition containing the elastomeric polymer (B) as an elastomer component
- the hydrogen bond crosslinking site side chain (a)
- 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.
- the content ratio of such a polymer (A) is less than the lower limit, fluidity (moldability) and mechanical strength tend to be insufficient, and when it exceeds the upper limit, compression set tends to decrease. .
- thermoplastic elastomer composition of the present invention has, as an elastomer component, an elastomeric polymer (A) and another elastomeric polymer having a side chain (b) other than the elastomeric polymer (B) (hereinafter referred to as “elastomer” in some cases).
- the content ratio of the elastomeric polymer (A) and the elastomeric polymer (C) is a mass ratio ([elastomeric polymer (A)]: [elastomeric]. In the polymer (C)]), the ratio is preferably 1: 9 to 9: 1, more preferably 2: 8 to 8: 2.
- 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, fluidity (moldability) and mechanical strength tend to be insufficient, whereas if the upper limit is exceeded, compression set tends to decrease. is there.
- 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 is, as necessary, a polymer other than the elastomer component, a reinforcing agent (filler), and a hydrogen bonding reinforcing agent (filler) as long as the object of the present invention is not impaired.
- a filler obtained by introducing an amino group (hereinafter simply referred to as “amino group-introducing filler”), an amino group-containing compound other than the amino group-introducing filler, and a compound containing a metal element (hereinafter simply referred to as “metal salt”) ),
- Maleic anhydride modified polymer anti-aging agent, antioxidant, pigment (dye), plasticizer, thixotropic agent, UV absorber, flame retardant, solvent, surfactant (including leveling agent),
- additives such as a dispersant, a dehydrating agent, a rust preventive agent, an adhesion imparting agent, an antistatic agent, and a filler can be contained.
- Such additives are not particularly limited, and commonly used ones (known ones) can be appropriately used.
- the following can be appropriately used as an anti-aging agent, an antioxidant, a pigment (dye), and a plasticizer.
- polymer other than the elastomer component another elastomeric polymer having a side chain (b) other than the elastomeric polymer (B) can be suitably used.
- carbon black silica, calcium carbonate and the like can be raised.
- carbon black wet silica is used as silica, and calcium carbonate is preferably used.
- an anti-aging agent for example, a hindered phenol-based, aliphatic and aromatic hindered amine-based compound can be appropriately used.
- a hindered phenol-based, aliphatic and aromatic hindered amine-based compound can be appropriately used.
- 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.
- plasticizer include benzoic acid, phthalic acid, trimellitic acid, pyromellitic acid, adipic acid, sebacic acid, fumaric acid, maleic acid, itaconic acid, citric acid.
- derivatives such as acids, polyesters, polyethers, epoxy resins, and the like can be used as appropriate.
- the content of the other component is particularly limited.
- the amount is preferably 300 parts by mass or less, more preferably 20 to 200 parts by mass with respect to 100 parts by mass of the elastomer component. 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 components is 100 parts by mass of the elastomer component. On the other hand, it 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 When the thermoplastic elastomer composition of the present invention is heated (for example, heated to 100 to 250 ° C.), it softens due to, for example, dissociation of hydrogen bonds formed at the hydrogen bonding cross-linked sites and other cross-linked structures. , Fluidity can be imparted. This is considered to be because the interaction between the side chains formed between the molecules or within the molecules by heating (weakly due to hydrogen bonds) is weakened. In the present invention, since the side chain contains an elastomer component containing at least a hydrogen-bonding cross-linked site, dissociated hydrogen bonds are bonded again when left to stand after being given fluidity by heating. Therefore, depending on the composition, the thermoplastic elastomer composition can be made to exhibit recyclability more efficiently.
- 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 exhibit sufficiently high tensile stress and sufficiently high heat resistance.
- characteristics necessary for the application for example, characteristics such as self-repairability and / or compression set resistance
- the thermoplastic elastomer composition of the present invention can exhibit a sufficiently high tensile stress and a sufficiently high heat resistance, and in addition, depending on the composition, a sufficient compression set resistance and / or It is also possible to exhibit sufficient self-healing properties.
- thermoplastic elastomer composition it is possible to appropriately exhibit the necessary characteristics in a balanced manner according to the use of the thermoplastic elastomer composition.
- type (composition) of the components in the composition 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.
- the method for producing the thermoplastic elastomer composition of the present invention comprises a first step of obtaining a mixture by mixing clay in an elastomeric polymer having a cyclic acid anhydride group in the side chain; 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
- a second step of obtaining a thermoplastic elastomer composition by adding at least one raw material compound among the mixed raw materials of the compound (II) that forms the compound, and reacting the polymer and the raw material compound; Including
- the thermoplastic elastomer composition has an elastomeric polymer (a) having a side chain (a) containing a hydrogen-bonding crosslinking site having a carbonyl-containing group and / or a nitrogen-containing heterocycle, and
- the first step is a step of obtaining a mixture by mixing clay in an elastomeric polymer having a cyclic acid anhydride group in the side chain.
- an elastomeric polymer having a cyclic acid anhydride group in the side chain means that the cyclic acid anhydride group has a chemically stable bond (covalent bond) at the atom forming the main chain of the polymer.
- a polymer capable of forming a main chain portion of the elastomeric polymers (A) to (B) is reacted with a compound capable of introducing a cyclic acid anhydride group. Can be suitably used.
- 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.
- Such maleic anhydride-modified elastomeric polymer is not particularly limited, and examples thereof include maleic anhydride-modified ethylene-propylene rubber, maleic anhydride-modified ethylene-butene rubber, maleic anhydride-modified isoprene rubber, maleic anhydride-modified polyethylene, Known maleic anhydride-modified elastomeric polymers such as maleic anhydride-modified polypropylene can be appropriately used.
- the elastomeric polymer having a cyclic acid anhydride group in the side chain is more preferably maleic anhydride-modified ethylene-propylene rubber or maleic anhydride-modified ethylene-butene rubber from the viewpoint of high molecular weight and high strength.
- the same clay as described in the thermoplastic elastomer composition of the present invention can be suitably used.
- clay is mixed in an elastomeric polymer having a cyclic acid anhydride group in the side chain to obtain a mixture.
- the clay content in the thermoplastic elastomer composition finally obtained is 20 parts by mass or less (more preferably 0.1 to 10 parts by mass) with respect to 100 parts by mass of the elastomer component.
- the clay is mixed in the elastomeric polymer having the cyclic acid anhydride group in the side chain at a ratio of about 5 parts by mass, more preferably 0.5 to 5 parts by mass, particularly preferably 1 to 3 parts by mass. It is preferable.
- the clay content in such a mixture is preferably 20 parts by mass or less, based on 100 parts by mass of the elastomeric polymer having a cyclic acid anhydride group in the side chain, and is 0.5 to 5 parts by mass. More preferably, the amount is 1 to 3 parts by mass. If the content is less than the lower limit, the amount of clay is too small, and the effect obtained by using clay tends to be reduced.On the other hand, if the upper limit is exceeded, crosslinking is too strong, On the other hand, the elongation and strength tend to decrease. In addition, by using clay with such content, content of the clay in the thermoplastic elastomer composition finally obtained becomes a value within the said range.
- the amount of clay used in the formation of such a mixture is as follows.
- the amount of the clay is 0.01 g to 1 mmol of the cyclic acid anhydride group in the elastomeric polymer having the cyclic acid anhydride group in the side chain.
- the content is preferably 2.0 g (more preferably 0.02 to 1.0 g). If the ratio of the clay to the acid anhydride group is less than the lower limit, the effect tends to be too low, whereas if the upper limit is exceeded, the crosslinking is too strong, and the elongation and strength tend to decrease. It is in.
- the clay contained in the mixture can be efficiently decomposed, and a single-layer clay can be efficiently produced, and the dispersibility of the clay is further improved. It tends to be advanced.
- the clay when adding clay to obtain the mixture, the clay should be added after plasticizing an elastomeric polymer having a cyclic acid anhydride group in the side chain in advance so that the clay is sufficiently dispersed. Is preferred.
- the method for plasticizing the elastomeric polymer having a cyclic acid anhydride group in the side chain in this way is not particularly limited, and rolls, kneaders, and the like at a plasticizing temperature (eg, about 100 to 250 ° C.). A method of kneading using an extruder, a universal stirrer or the like can be appropriately employed.
- Conditions such as temperature when plasticizing an elastomeric polymer having such a cyclic acid anhydride group in the side chain are not particularly limited, depending on the type of elastomeric polymer having a cyclic acid anhydride group in the side chain. May be set as appropriate.
- mixing may be performed so that the clay is sufficiently dispersed, and the method is not particularly limited, and a known method can be appropriately employed.
- a method of mixing with a kneader, an extruder, a universal stirrer or the like can be employed.
- a polymer other than the elastomer component, a reinforcing agent (filler), and a filler obtained by introducing an amino group hereinafter simply referred to as “amino group” within the range not impairing the object of the present invention.
- Introducing fillers amino group-containing compounds other than the amino group-introducing fillers, compounds containing metal elements (hereinafter simply referred to as“ metal salts ”), maleic anhydride-modified polymers, anti-aging agents, antioxidants Agents, pigments (dyes), plasticizers, thixotropic agents, UV absorbers, flame retardants, solvents, surfactants (including leveling agents), dispersants, dehydrating agents, rust inhibitors, adhesion promoters, antistatic agents
- metal salts compounds containing metal elements
- maleic anhydride-modified polymers include anti-aging agents, antioxidants Agents, pigments (dyes), plasticizers, thixotropic agents, UV absorbers, flame retardants, solvents, surfactants (including leveling agents), dispersants, dehydrating agents, rust inhibitors, adhesion promoters, antistatic agents
- additives and the like are not particularly limited, and those commonly used can be appropriately used.
- 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. More preferably, it is 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.
- thermoplastic elastomer composition by adding at least one raw material compound of the mixed raw materials of the compound (II) that forms a covalent cross-linking site and reacting the polymer and the raw material compound. is there.
- 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, It is preferably thiadiazole, imidazole, isocyanurate, triazine and hydantoin, more preferably triazole, pyridine, thiadiazole, imidazole, isocyanurate, triazine and hydantoin having the above-mentioned substituents.
- the triazole, isocyanurate, and triazine are more preferable, and the triazole having the substituent is particularly preferable.
- 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 capable of forming a covalent bond” ”can be preferably used (the same applies to those suitable as 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).
- trishydroxyethyl isocyanurate, sulfamide and polyether polyol are preferable, trishydroxyethyl isocyanurate and sulfamide are more preferable, and trishydroxyethyl isocyanurate is preferable. Further preferred.
- the raw material compound comprising at least one of the compound (I) and the mixed raw materials of the compound (I) and the compound (II) includes a hydroxyl group, a thiol group, and an amino group.
- Triazole optionally having at least one substituent group; Pyridine optionally having at least one substituent group among hydroxyl group, thiol group and amino group; Of hydroxyl group, thiol group and amino group A thiadiazole optionally having at least one substituent; an imidazole optionally having at least one substituent selected from a hydroxyl group, a thiol group and an amino group; Isocyanurate optionally having at least one substituent; at least one substituent selected from a hydroxyl group, a thiol group and an amino group A triazine which may have; a hydantoin which may have at least one substituent of a hydroxyl group, a thiol group and an amino group; a trishydroxyethyl
- 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
- the heterocyclic ring-containing polyol, the heterocyclic ring-containing polyamine, and the heterocyclic ring-containing polythiol can be suitably used. Trishydroxyethyl isocyanurate is particularly preferred.
- the amount of compound (I) and compound (II) added is not particularly limited.
- active hydrogen such as amine or alcohol
- the amount of active hydrogen such as amine or alcohol in the compound is 20 to 250 mol% with respect to 100 mol% of the cyclic acid anhydride group.
- the amount is preferably 50 to 150 mol%, 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 amount of compound (I) and compound (II) added is such that the total amount thereof (when only one compound is used, is the amount of one compound), the polymer ( The elastomeric polymer having a cyclic acid anhydride group in the side chain) is preferably from 0.1 to 10 parts by weight, more preferably from 0.3 to 7 parts by weight, based on 100 parts by weight, More preferably, it is ⁇ 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. When it exceeds, it will be too many, and there exists a tendency for a branch to increase and a crosslinking density to fall.
- 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.
- a hydrogen-bonding cross-linking site is formed at the site where the compound (I) and the cyclic acid anhydride group are reacted. Therefore, a hydrogen-bonding cross-linking site (carbonyl group) is formed on the side chain of the polymer.
- 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.
- the content of the clay is 20 parts by mass or less with respect to 100 parts by mass of the elastomer component.
- 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.
- thermoplastic elastomer composition modifies the elastomeric polymer having the cyclic acid anhydride group in the side chain (hereinafter sometimes referred to as “an acid anhydride-containing polymer”). Manufactured. In this way, by dispersing clay in the acid anhydride polymer in advance, the acid anhydride group and the clay interact with each other, and the clay layer is easily peeled off.
- the clay is an organic clay (organized clay) that is preferably used in the present invention
- the organic substance such as an ammonium salt present between the layers interacts with the acid anhydride, so that the layer is more peeled. It tends to be easily done.
- the raw material compound functions as a cross-linking agent for forming a cross-link.
- cross-linking agent is reacted with the cross-linking agent and the acid anhydride group.
- at least hydrogen bonding cross-linking sites for example, carboxylic acid groups
- thermoplastic elastomer composition obtained by the present invention the clay is sufficiently dispersed, and the clay and the hydrogen bonding cross-linking site interact to form a uniform surface cross-linking site. From the above, the present inventors infer that the material has a sufficiently high tensile stress (modulus) and sufficient heat resistance.
- 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, still more preferably 80 to 100%, particularly preferably 85 to 100%) of the total clay is based on the number at all measurement points. It can also be present as a 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 clay interacts with the cyclic acid anhydride group, making it possible to more efficiently peel off the layers of the multilayered clay, and the clay is in a single layer state.
- 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, PET bottle cap liners, and the like.
- 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, sandal
- 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 compositions obtained in Examples 1 to 15 and Comparative Examples 1 to 5 were hot press molded at 200 ° C. for 10 minutes, then 2 mm thick, 15 cm long, horizontal A 15 cm flat plate sample was prepared, and JIS-A hardness was measured according to JIS K6253 (issued in 2012).
- thermoplastic elastomer compositions obtained in Examples 1 to 13 and Comparative Examples 1 to 5 were first hot-pressed at 200 ° C. for 10 minutes to prepare 1 mm thick sheets.
- a No. 3 dumbbell-shaped test piece was punched from the sheet thus obtained, and a tensile test at a tensile speed of 500 mm / min was conducted in accordance with JIS K6251 (issued in 2010), and 100% modulus (M100) [MPa ], Breaking strength (T B ) [MPa], and breaking elongation (E B ) [%] were measured at room temperature (25 ° C.).
- thermoplastic elastomer compositions obtained in Examples 1 to 13 and Comparative Examples 1 to 5 were hot-pressed at 200 ° C. for 10 minutes to prepare 2 mm thick sheets.
- the sheets obtained in this manner were punched into a disk shape, and after seven sheets were stacked, the height (thickness) was 12.5 ⁇ 5 mm, and compressed by 25% with a dedicated jig, at 70 ° C.
- the compression set after being left for 22 hours was measured according to JIS K6262 (issued in 2013).
- a trade name “vulcanized rubber compression set SCM-1008L” manufactured by Dumbbell Co., Ltd. was used as a compression device.
- thermogravimetric measuring device TGA
- thermoplastic elastomer compositions obtained in Examples 1 to 3 and Comparative Examples 1 to 5 were each measured for self-healing properties as follows. That is, first, the thermoplastic elastomer composition was hot press molded at 200 ° C. for 10 minutes, and then a flat plate sample having a thickness of 1 m, a length of 2 cm, and a width of 2 cm was prepared. And a notch from the central part of the horizontal side toward the center of the sheet. Next, after heating the cut sheet to 60 ° C., the temperature is raised from 60 ° C. to 140 ° C. every 20 ° C. and left for 10 minutes each time the 20 ° C. temperature rises (from 60 ° C. to 80 ° C.
- Example 1 First, 100 g of maleic anhydride-modified ethylene-butene copolymer (trade name “Tuffmer MH5020” manufactured by Mitsui Chemicals) and 0.1 g of an anti-aging agent (trade name “Irganox 1010” manufactured by BASF) were charged into a pressure kneader. The mixture was kneaded at 200 ° C. for 2 minutes for plasticization, and 5 g of organoclay (trade name “Kunifil D-36” manufactured by Kunimine Industries Co., Ltd.) was further added, and the mixture was kneaded at 200 ° C. for 4 minutes. Got.
- organoclay trade name “Kunifil D-36” manufactured by Kunimine Industries Co., Ltd.
- thermoplastic elastomer composition 1.26 g of 4H-3-amino-1,2,4-triazole (ATA: aminotriazole) was added to the mixture and mixed at 200 ° C. for 8 minutes to prepare a thermoplastic elastomer composition.
- Table 1 shows the evaluation results and the like of the properties of the obtained thermoplastic elastomer composition.
- Example 2 First, 100 g of maleic anhydride-modified ethylene-butene copolymer (trade name “Tuffmer MH5020” manufactured by Mitsui Chemicals) and 0.1 g of an anti-aging agent (trade name “Irganox 1010” manufactured by BASF) were charged into a pressure kneader. The mixture was kneaded at 200 ° C. for 2 minutes for plasticization, and 5 g of organoclay (trade name “Kunifil D-36” manufactured by Kunimine Industries Co., Ltd.) was further added, and the mixture was kneaded at 200 ° C. for 4 minutes. Got.
- organoclay trade name “Kunifil D-36” manufactured by Kunimine Industries Co., Ltd.
- thermoplastic elastomer composition 1.31 g of trishydroxyethyl isocyanurate (trade name “Tanac” manufactured by Nissei Sangyo Co., Ltd.) was added to the mixture and mixed at 200 ° C. for 8 minutes to prepare a thermoplastic elastomer composition.
- Table 1 shows the evaluation results and the like of the properties of the obtained thermoplastic elastomer composition.
- 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)”. Further, such an elastomeric polymer was confirmed to have a glass transition point of 25 ° C. or lower because the main chain is composed of ethylene and butene.
- thermoplastic elastomer composition obtained in Example 1 and 50 g of the thermoplastic elastomer composition obtained in Example 2 were put into a pressure kneader and mixed at 200 ° C. for 8 minutes to prepare a thermoplastic elastomer.
- Table 1 shows the evaluation results and the like of the properties of the obtained thermoplastic elastomer composition.
- thermoplastic elastomer composition composition containing an organized clay and a maleic anhydride-modified ethylene-butene copolymer.
- Table 1 shows the evaluation results and the like of the properties of the obtained thermoplastic elastomer composition.
- Comparative Example 2 100 g of maleic anhydride-modified ethylene-butene copolymer (trade name “Tafmer MH5020” manufactured by Mitsui Chemicals) and 0.1 g of an anti-aging agent (trade name “Irganox 1010” manufactured by BASF) were charged into a pressure kneader. After plasticizing by mastication at 200 ° C. for 2 minutes, 1.26 g of 4H-3-amino-1,2,4-triazole (ATA) is added and mixed at 200 ° C. for 8 minutes.
- ATA 4H-3-amino-1,2,4-triazole
- thermoplastic elastomer composition (a composition containing an elastomeric polymer having a side chain containing a structure represented by the above formula (102) and an anti-aging agent: no organoclay) was prepared.
- Table 1 shows the evaluation results and the like of the properties of the obtained thermoplastic elastomer composition.
- thermoplastic elastomer composition (a composition comprising an elastomeric polymer mainly having the side chain (iii) (which may have a side chain (i) and / or a side chain (ii)) and an anti-aging agent.
- Product no organoclay.
- Table 1 shows the evaluation results and the like of the properties of the obtained thermoplastic elastomer composition.
- thermoplastic elastomer composition for comparison (a side chain containing a structure represented by the above formula (102) and a side chain (iii ) Mainly comprising an elastomeric polymer (which may have side chains (i) and / or side chains (ii)) and an anti-aging agent: no organoclay It was prepared.
- Table 1 shows the evaluation results and the like of the properties of the obtained thermoplastic elastomer composition.
- thermoplastic elastomer 7030NS An olefinic thermoplastic elastomer (trade name “Miralastomer 7030NS”) manufactured by Mitsui Chemicals was used as it was as a thermoplastic elastomer composition for comparison.
- Table 1 shows the evaluation results of the properties of the thermoplastic elastomer composition.
- polymer (I) the maleic anhydride-modified ethylene-butene copolymer used in the production of the composition is referred to as polymer (I).
- the side chain containing the structure represented by the above formula (102) (the side chain containing a hydrogen-bonding crosslinking site having a carbonyl-containing group and a nitrogen-containing heterocycle)
- thermoplastic elastomer compositions of the present invention (Examples 1 to 3) containing 5 wt% have a 5% weight loss temperature of 400 ° C.
- thermoplastic elastomer compositions of the present invention (Examples 1 to 3) have sufficiently high heat resistance.
- thermoplastic elastomer compositions of the present invention all had a 100% modulus value of 2.44 or more, and the thermoplastic elastomer compositions obtained in Comparative Examples 1 to 5 were used.
- the value of 100% modulus was improved as compared with the value of 100% modulus of the object (about 1.46 at the maximum). From these results, it was also confirmed that the thermoplastic elastomer compositions (Examples 1 to 3) of the present invention have sufficient tensile stress.
- thermoplastic elastomer composition obtained in Examples 1 to 3 and the thermoplastic elastomer composition obtained in Comparative Example 1 are compared, the types of side chains of the elastomeric polymer in the composition are different.
- an elastomeric polymer having a side chain containing a hydrogen-bonding crosslinking site (side chain containing a structure represented by the above formula (102)) is used (in the case of Example 1)
- an elastomeric polymer mainly containing chain (iii) is used (in the case of Example 2)
- a mixture of these elastomeric polymers in the case of Example 3
- thermoplastic elastomer composition obtained in Example 1 and the thermoplastic elastomer composition obtained in Comparative Example 2 were compared, the presence or absence of organic clay was different, but organic clay was introduced.
- Example 1 it was confirmed that sufficient tensile stress and sufficient heat resistance were obtained, and the resistance to breaking strength and compression set was sufficiently improved.
- Example 2 and the thermoplastic elastomer composition obtained in Comparative Example 3 are compared, the presence or absence of organoclay is different, but the organoclay is introduced.
- organoclay is introduced.
- Example 2 it was confirmed that sufficient tensile stress and sufficient heat resistance were obtained, and the breaking strength was dramatically improved.
- thermoplastic elastomer composition obtained in Examples 1 to 3 and the thermoplastic elastomer composition obtained in Comparative Example 4 were compared, sufficient tensile stress and sufficient heat resistance were obtained, and organic It was also confirmed that the breaking strength was sufficiently improved by containing modified clay.
- thermoplastic elastomer compositions (Examples 1 to 3) of the present invention, in particular, heat resistance (heat resistance with 5% weight loss temperature as an index) and tensile stress (especially 100% modulus). It has been confirmed that the tensile stress) can be sufficiently improved.
- thermoplastic elastomer compositions obtained in Examples 1 and 3 were confirmed to be self-healing, and the thermoplastic elastomer compositions obtained in Examples 2 and 3 were resistant to high compression set. Was confirmed. As described above, it was confirmed that the thermoplastic elastomer compositions (Examples 1 to 3) of the present invention can appropriately exhibit desired characteristics depending on the composition.
- thermoplastic elastomer compositions (Examples 1 to 3) of the present invention are very excellent in terms of heat resistance and tensile strength required for the thermoplastic elastomer composition. confirmed.
- desired properties self-repairability, resistance to compression set, etc.
- Example 4 First, 100 g of maleic anhydride-modified ethylene-butene copolymer (trade name “Tuffmer MH5020” manufactured by Mitsui Chemicals) and 0.1 g of an anti-aging agent (trade name “Irganox 1010” manufactured by BASF) were charged into a pressure kneader. After 2 minutes of mastication at 200 ° C. for plasticization, 2 g of organic clay (trade name “Kunifil D-36” manufactured by Kunimine Kogyo Co., Ltd.) was further added and kneaded at 200 ° C. for 4 minutes to obtain a mixture Got.
- an anti-aging agent trade name “Irganox 1010” manufactured by BASF
- thermoplastic elastomer composition 1.26 g of 4H-3-amino-1,2,4-triazole (ATA) was added to the mixture and mixed at 200 ° C. for 8 minutes to prepare a thermoplastic elastomer composition.
- Table 2 shows the evaluation results of the properties of the obtained thermoplastic elastomer composition.
- Example 5 First, 100 g of maleic anhydride-modified ethylene-butene copolymer (trade name “Tuffmer MH5020” manufactured by Mitsui Chemicals) and 0.1 g of an anti-aging agent (trade name “Irganox 1010” manufactured by BASF) were charged into a pressure kneader. After 2 minutes of mastication at 200 ° C. for plasticization, 2 g of organic clay (trade name “Kunifil D-36” manufactured by Kunimine Kogyo Co., Ltd.) is further added, and the mixture is kneaded at 200 ° C. for 4 minutes. Got.
- organic clay trade name “Kunifil D-36” manufactured by Kunimine Kogyo Co., Ltd.
- thermoplastic elastomer composition 1.31 g of trishydroxyethyl isocyanurate (trade name “Tanac” manufactured by Nissei Sangyo Co., Ltd.) was added to the mixture and mixed at 200 ° C. for 8 minutes to prepare a thermoplastic elastomer composition.
- Table 2 shows the evaluation results of the properties of the obtained thermoplastic elastomer composition.
- the maleic anhydride group in the maleic anhydride-modified ethylene-butene copolymer reacts with trishydroxyethyl isocyanurate from the raw material compound used, whereby the side chain (iii)
- the side chain (iii) It can be seen that an elastomeric polymer having a main chain (which may have side chains (i) and / or side chains (ii)) is formed. Further, such an elastomeric polymer was confirmed to have a glass transition point of 25 ° C. or lower because the main chain is composed of ethylene and butene.
- Example 6 First, 100 g of maleic anhydride-modified ethylene-butene copolymer (trade name “Tuffmer MH5020” manufactured by Mitsui Chemicals) and 0.1 g of an anti-aging agent (trade name “Irganox 1010” manufactured by BASF) were charged into a pressure kneader. After 2 minutes of mastication at 200 ° C. for plasticization, 2 g of organic clay (trade name “Kunifil D-36” manufactured by Kunimine Kogyo Co., Ltd.) is further added, and the mixture is kneaded at 200 ° C. for 4 minutes. Got.
- organic clay trade name “Kunifil D-36” manufactured by Kunimine Kogyo Co., Ltd.
- thermoplastic elastomer composition was prepared by mixing at 200 ° C for 8 minutes. Table 2 shows the evaluation results of the properties of the obtained thermoplastic elastomer composition.
- Example 7 First, 100 g of maleic anhydride-modified ethylene-butene copolymer (trade name “Tuffmer MH5020” manufactured by Mitsui Chemicals) and 0.1 g of an anti-aging agent (trade name “Irganox 1010” manufactured by BASF) were charged into a pressure kneader. After 2 minutes of mastication at 200 ° C. for plasticization, 2 g of organic clay (trade name “Kunifil D-36” manufactured by Kunimine Kogyo Co., Ltd.) is further added, and the mixture is kneaded at 200 ° C. for 4 minutes. Got.
- organic clay trade name “Kunifil D-36” manufactured by Kunimine Kogyo Co., Ltd.
- thermoplastic elastomer composition was prepared by mixing at 200 ° C for 8 minutes. Table 2 shows the evaluation results of the properties of the obtained thermoplastic elastomer composition.
- Example 8 30 g of a thermoplastic elastomer composition obtained by adopting the same method as employed in Example 4, and 70 g of a thermoplastic elastomer composition obtained by employing the same method as employed in Example 5. Were mixed to obtain a thermoplastic elastomer composition. Table 2 shows the evaluation results of the properties of the obtained thermoplastic elastomer composition.
- Example 9 20 g of a thermoplastic elastomer composition obtained by employing the same method as employed in Example 4, and 80 g of a thermoplastic elastomer composition obtained by employing the same method as employed in Example 5. Were mixed to obtain a thermoplastic elastomer composition. Table 2 shows the evaluation results of the properties of the obtained thermoplastic elastomer composition.
- thermoplastic elastomer compositions obtained in Examples 6 to 7 and the thermoplastic elastomer compositions obtained in Examples 8 to 9 were converted into side chains derived from aminotriazole and trishydroxyethyl isocyanurate.
- thermoplastic elastomer composition contains the structure represented by the above formula (102)
- the side chain to be present and the side chain (iii) are present (Examples 8 to 9)
- the side chain containing the structure represented by the formula (102) and the side chain (iii) It was found that a higher breaking strength can be obtained when one type of elastomeric polymer is included (Examples 6 to 7).
- thermoplastic elastomer composition of the present invention (Examples 4 to 5) is particularly excellent in terms of heat resistance and tensile stress required for the thermoplastic elastomer composition. Was confirmed.
- Example 10 to 13 In Examples 10 to 13, the amount of each raw material compound (maleic anhydride-modified ethylene-butene copolymer, anti-aging agent, organoclay, trishydroxyethyl isocyanurate) was changed to the amount shown in Table 3.
- organoclay (trade name “Kunifil D-36” manufactured by Kunimine Kogyo Co., Ltd.) was further added at a ratio shown in Table 3. The mixture was kneaded at 200 ° C. for 4 minutes to obtain a mixture. Next, trishydroxyethyl isocyanurate (trade name “Tanac” manufactured by Nissei Sangyo Co., Ltd.) was added to the mixture at a ratio shown in Table 3 and mixed at 200 ° C. for 8 minutes to prepare a thermoplastic elastomer composition. Table 3 shows the evaluation results of the properties of the obtained thermoplastic elastomer compositions.
- thermoplastic elastomer composition (Example 14) Montmorillonite (trade name “Kunipia F”, trade name “Kunimine Industry Co., Ltd., manufactured by Kunimine Industries Co., Ltd.”) instead of organic clay (Kunimine Industry Co., Ltd., trade name “Kunifil D-36”)
- a thermoplastic elastomer composition was prepared in the same manner as in Example 13 except that the main component was not magnesium.
- Table 3 shows the evaluation results of the properties of the obtained thermoplastic elastomer compositions.
- thermoplastic elastomer composition was prepared in the same manner as in Example 13 except that was used. Table 3 shows the evaluation results of the properties of the obtained thermoplastic elastomer compositions.
- the maleic anhydride group in the maleic anhydride-modified ethylene-butene copolymer trishydroxyethyl isocyanurate, and It is understood that an elastomeric polymer mainly having the side chain (iii) (which may have the side chain (i) and / or the side chain (ii)) is formed by the reaction. Moreover, since all such elastomeric polymers are composed of ethylene and butene in the main chain, it was confirmed that the glass transition point was 25 ° C. or lower.
- Example 2 The maleic anhydride-modified ethylene-butene copolymer used in the production of the composition is referred to as polymer (I).
- thermoplastic elastomer compositions of the present invention (Example 2 and Examples 10 to 15)
- the 100% modulus and the 5% weight loss temperature are sufficiently high values. It was confirmed that the heat resistance with 5% weight loss temperature as an index and the tensile stress with 100% modulus as an index are sufficiently improved.
- thermoplastic elastomer composition obtained in Examples 2, 11, and 13 and the thermoplastic elastomer composition obtained in Comparative Example 3 are compared, the presence or absence of the organic clay is different, but the organic When chlorinated clay was introduced (Examples 2, 11, and 13), it was confirmed that the heat resistance and the tensile stress were sufficiently improved, the breaking strength and breaking elongation were also improved, and particularly the tensile strength was improved. It was done.
- thermoplastic elastomer compositions obtained in Examples 2 and 10 to 15 were all 100% modulus, breaking strength, elongation at break and 5% as compared with the thermoplastic elastomer composition obtained in Comparative Example 3. It was confirmed that all the% weight loss temperatures were excellent.
- Example 16 100 g of maleic anhydride-modified ethylene-propylene copolymer (trade name “Tafmer MMP0620” manufactured by Mitsui Chemicals) and 0.1 g of an anti-aging agent (trade name “Irganox 1010” manufactured by BASF) were charged into a pressure kneader. After plasticizing by kneading at 200 ° C. for 2 minutes, 2 g of organic clay (trade name “Kunifil D-36” manufactured by Kunimine Kogyo Co., Ltd.) is further added and kneaded at 200 ° C. for 4 minutes to obtain a mixture. It was. Next, 1.26 g of 4H-3-amino-1,2,4-triazole (ATA: aminotriazole) was added to the mixture and mixed at 200 ° C. for 8 minutes to prepare a thermoplastic elastomer composition.
- ATA aminotriazole
- Example 17 100 g of maleic anhydride-modified ethylene-propylene copolymer (trade name “Tuffmer MMP0620” manufactured by Mitsui Chemicals) was put into a pressure kneader and masticated at 200 ° C. for 2 minutes for plasticization, followed by 4H-3 -1.26 g of amino-1,2,4-triazole (ATA) was added and mixed at 200 ° C. for 8 minutes, and then 5 g of organoclay (trade name “Kunifil D-36” manufactured by Kunimine Kogyo Co., Ltd.) was further added.
- the thermoplastic elastomer composition was prepared by kneading at 200 ° C. for 4 minutes.
- thermoplastic elastomer compositions obtained in Examples 16 and 17 were used, respectively, and the compositions were hot-pressed at 200 ° C. for 10 minutes to prepare 1 mm thick sheets. Next, a No. 3 dumbbell-shaped test piece was punched out from the obtained sheet, and a tensile test at a tensile speed of 500 mm / min was conducted in accordance with JIS K6251 (issued in 2010). 100% modulus [MPa], 200% modulus [MPa], 300% modulus [MPa], 400% modulus [MPa], and 500% modulus [MPa] were measured. Table 4 shows the obtained results.
- the organoclay becomes highly dispersed, making it possible to disperse the organoclay in a single-layer state more efficiently and suppressing stress concentration.
- the present inventors speculate that this is the case.
- thermoplastic elastomer compositions obtained in Examples 1, 2, 11, 16, and 17 10 g of each of the thermoplastic elastomer compositions obtained in Examples 1, 2, 11, 16, and 17 was prepared and used as samples, and the surfaces of the samples were each measured with a transmission electron microscope (trade name “manufactured by JEOL Ltd.” JEM-2010 "). That is, using the transmission electron microscope, the magnification was 50,000 times, and three measurement points each having a size of 5.63 ⁇ m 2 were measured on the surface of each thermoplastic elastomer composition 10 g (sample). did.
- thermoplastic elastomer compositions obtained in Examples 1, 2, 11, 16, and 17 are shown in FIG. 1 (Example 1), FIG. 2 (Example 2), and FIG. 3 (Example 11), respectively. ), FIG. 4 (Example 16), and FIG. 5 (Example 17).
- thermoplastic elastomer compositions obtained in Examples 1, 2, 11, 16, and 17 all contain a single layer of clay. It was found that the clay was sufficiently uniformly dispersed in the layer state.
- thermoplastic elastomer compositions obtained in Examples 1, 2, 11, 16, and 17 the ratio of the single-layer clay to the total clay observed at each of the three measurement points was based on the number. As shown in FIG. As a result, as apparent from the results shown in FIGS. 1 to 5, in the thermoplastic elastomer composition obtained in Example 1, the ratio of the monolayer clay to the total clay at any of the three measurement points. Is 90% or more, and in the thermoplastic elastomer composition obtained in Example 2, the ratio of the monolayer clay to the total clay is 90% or more at any of the three measurement points. In the thermoplastic elastomer composition obtained in Example 11, the ratio of the single-layered clay to the total clay is 90% or more at any of the three measurement points.
- thermoplastic elastomer composition the ratio of the monolayer clay to the total clay is 90% or more at any of the three measurement points, and the thermoplasticity obtained in Example 17 was obtained.
- clay proportion of single-layer also to the total clay in either measurement points 3 points was 80% or more.
- thermoplastic elastomer composition obtained in Examples 1, 2, 11, 16, and 17 it was confirmed that a single layer of clay was dispersed in a sufficient ratio. From these results, it was found that the thermoplastic elastomer composition obtained in each example contained a single layer of clay in a sufficiently high proportion and sufficiently uniformly dispersed.
- thermoplastic elastomer compositions obtained in Examples 16 and 17 were compared with each other, before forming the elastomeric polymer having a side chain containing the structure represented by the above formula (102), the organoclay It was confirmed that the content of the single-layer clay was further improved by introducing C into the system (by adding clay before adding aminotriazole). Considering these results together with the modulus values of Examples 16 and 17, it was confirmed that when the content ratio of the single-layer clay was improved, the modulus value was improved. It was found that the tensile stress can be improved at a higher level by further improving.
- thermoplastic elastomer composition capable of having a sufficiently high tensile stress and sufficiently high heat resistance and a method for producing the same.
- the tensile stress and heat resistance can be exhibited at a sufficiently high level as described above, and sufficient compression set resistance and / or sufficient depending on the composition.
- Self-healing properties can be exhibited, and necessary properties can be appropriately exhibited according to the use of the thermoplastic elastomer composition.
- thermoplastic elastomer composition of the present invention is particularly excellent in tensile strength and heat resistance, and can exhibit various properties in a well-balanced manner depending on the application.
- products around automobiles, hoses, Belt, sheet, anti-vibration rubber, roller, lining, rubberized cloth, sealing material, gloves, fender, medical rubber (syringe gasket, tube, catheter), gasket (for home appliances, construction), asphalt modifier It is useful as a material for producing products used for hot melt adhesives, boots, grips, toys, shoes, sandals, keypads, gears, PET bottle cap liners, and the like.
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Abstract
Description
クレイと、
を含有してなり、前記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質量部以下である、ものである。
で表される構造部分を含有することが好ましく、下記一般式(101):
で表される構造部分を含有することがより好ましい。
前記クレイが有機化クレイであることが好ましい。
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第二工程と、
を含み、
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(a)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、
クレイと、
を含有してなる組成物であり、かつ、
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中にクレイを混合する、方法である。
前記原料化合物が水酸基、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、並びに、ポリエーテルポリオールのうちの少なくとも1種の化合物であり、
前記エラストマー成分が、前記無水マレイン酸変性エラストマー性ポリマーと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種であり、かつ、
前記クレイが、有機化クレイ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(a)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、
クレイと、
を含有してなり、前記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質量部以下である、ものである。ここで、先ず、本発明の熱可塑性エラストマー組成物に含まれる各成分を分けて説明する。
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(a)」とは、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、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する場合、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。
本発明にかかるクレイとしては特に制限されず、公知のクレイ(粘度鉱物等)を適宜利用することができる。また、このようなクレイとしては、天然のクレイ、合成クレイ、有機化クレイが挙げられる。
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、前記クレイ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中にクレイ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第二工程と、
を含み、
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(a)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、
クレイと、
を含有してなる組成物であり、かつ、
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中にクレイを混合する、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中にクレイ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。
クレイと、
を含有してなる熱可塑性エラストマー組成物を得ることができる。また、このような熱可塑性エラストマー組成物においては、前記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。なお、このようにして得られる熱可塑性エラストマー組成物中のエラストマー性ポリマー(A)、エラストマー性ポリマー(B)は、各ポリマー中の側鎖(a)、側鎖(a’)、側鎖(b)、側鎖(c)がそれぞれ環状酸無水物基との反応に由来するもの(例えば、上記式(2)、(3)および(7)~(9)で表される構造を含有する側鎖等)となる以外は、上記本発明の熱可塑性エラストマー組成物において説明したエラストマー性ポリマー(A)、エラストマー性ポリマー(B)と同様のものである。
実施例1~15及び比較例1~5で得られた熱可塑性エラストマー組成物をそれぞれ用い、該熱可塑性エラストマー組成物を200℃で10分間熱プレス成形した後、厚さ2mm、縦15cm、横15cmの平板サンプルを調製し、JIS K6253(2012年発行)に準拠して、JIS-A硬度を測定した。
実施例1~13及び比較例1~5で得られた熱可塑性エラストマー組成物をそれぞれ用い、先ず、該熱可塑性エラストマー組成物を200℃で10分間熱プレスし、1mm厚のシートを調製した。このようにして得られたシートから3号ダンベル状の試験片を打ち抜き、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]、破断強度(TB)[MPa]、および、破断伸び(EB)[%]を室温(25℃)にて測定した。
実施例1~13及び比較例1~5で得られた熱可塑性エラストマー組成物をそれぞれ用い、先ず、該熱可塑性エラストマー組成物を200℃で10分間熱プレスし、2mm厚のシートを調製した。このようにして得られたシートを円盤状に打ち抜いて7枚重ね合わせた後、高さ(厚み)が12.5±5mmになるようにして、専用治具で25%圧縮し、70℃で22時間放置した後の圧縮永久歪みをJIS K6262(2013年発行)に準拠して測定した。なお、圧縮装置としてはダンベル社製の商品名「加硫ゴム圧縮永久歪試験器 SCM-1008L」を用いた。
実施例1~13及び比較例1~5で得られた熱可塑性エラストマー組成物をそれぞれ用い、測定装置として熱重量測定装置(TGA)を用い、昇温速度10℃/minで測定し、初期の重量から5%重量が減少した温度を測定した。なお、測定試料は約10mgを使用した。
実施例1~3及び比較例1~5で得られた熱可塑性エラストマー組成物については、それぞれ、以下のようにして自己修復性を測定した。すなわち、先ず、前記熱可塑性エラストマー組成物を200℃で10分間熱プレス成形した後、厚さ1m、縦2cm、横2cmの平板サンプルを調製し、そのシートに5mmの長さの切込み(縦方向と平行な方向で、かつ、横の辺の中心部分からシートの中心に向かって切れ込みを入れた。)を1つ入れた。次に、切れ込みを入れたシートを60℃まで昇温した後、60℃から20℃づつ140℃まで昇温し、20℃温度が上がるごとに10分間放置し(60℃から20℃づつ80℃、100℃、120℃、140℃の各温度まで順次昇温し、各温度で10分間放置し)、切込み部分が接着するかどうかを確認し、切込み部分が接着された温度を記録した。
先ず、無水マレイン酸変性エチレン-ブテン共重合体(三井化学社製の商品名「タフマーMH5020」)100gおよび老化防止剤(BASF社製の商品名「Irganox1010」)0.1gを加圧ニーダーに投入し、200℃で2分間素練りして可塑化させた後に、有機化クレイ(クニミネ工業社製の商品名「クニフィルD-36」)5gを更に加えて、200℃で4分間混練して混合物を得た。次いで、前記混合物に4H-3-アミノ-1,2,4-トリアゾール(ATA:アミノトリアゾール)を1.26g加え、200℃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。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等を表1に示す。
先ず、無水マレイン酸変性エチレン-ブテン共重合体(三井化学社製の商品名「タフマーMH5020」)100gおよび老化防止剤(BASF社製の商品名「Irganox1010」)0.1gを加圧ニーダーに投入し、200℃で2分間素練りして可塑化させた後に、有機化クレイ(クニミネ工業社製の商品名「クニフィルD-36」)5gを更に加えて、200℃で4分間混練して混合物を得た。次いで、前記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」)を1.31g加え、200℃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。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等を表1に示す。
(実施例3)
実施例1で得られた熱可塑性エラストマー組成物50gと実施例2で得られた熱可塑性エラストマー組成物50gを加圧ニーダーに投入して、200℃で8分間混合し、熱可塑性エラストマーを調製した。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等を表1に示す。
無水マレイン酸変性エチレン-ブテン共重合体(三井化学社製の商品名「タフマーMH5020」)100gおよび老化防止剤(BASF社製の商品名「Irganox1010」)0.1gを加圧ニーダーに投入し、200℃で2分間素練りして可塑化させた後に、有機化クレイ(クニミネ工業社製の商品名「クニフィルD-36」)5gを更に加えて、200℃で4分間混練して混合物を形成し、かかる混合物を比較のための熱可塑性エラストマー組成物(有機化クレイと、無水マレイン酸変性エチレン-ブテン共重合体とを含む組成物)とした。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等を表1に示す。
無水マレイン酸変性エチレン-ブテン共重合体(三井化学社製の商品名「タフマーMH5020」)100gおよび老化防止剤(BASF社製の商品名「Irganox1010」)0.1gを加圧ニーダーに投入し、200℃で2分間素練りして可塑化させた後に、4H-3-アミノ-1,2,4-トリアゾール(ATA)を1.26g加えて、200℃で8分間混合し、比較のための熱可塑性エラストマー組成物(上記式(102)で表される構造を含有する側鎖を有するエラストマー性ポリマーと、老化防止剤とを含む組成物:有機化クレイなし)を調製した。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等を表1に示す。
無水マレイン酸変性エチレン-ブテン共重合体(三井化学社製の商品名「タフマーMH5020」)100gおよび老化防止剤(BASF社製の商品名「Irganox1010」)0.1gを加圧ニーダーに投入し、200℃で2分間素練りして可塑化させた後に、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」)を1.31g加え、200℃で8分間混合し、比較のための熱可塑性エラストマー組成物(上記側鎖(iii)を主として有するエラストマー性ポリマー(なお、側鎖(i)及び/又は側鎖(ii)を有し得る。)と、老化防止剤とを含む組成物:有機化クレイなし)を調製した。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等を表1に示す。
無水マレイン酸変性エチレン-ブテン共重合体(三井化学社製の商品名「タフマーMH5020」)100gおよび老化防止剤(BASF社製の商品名「Irganox1010」)0.1gを加圧ニーダーに投入し、200℃で2分間素練りして可塑化させた後に、4H-3-アミノ-1,2,4-トリアゾール(ATA)0.63gおよび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」)0.66gを加えて、200℃で8分間混合し、比較のための熱可塑性エラストマー組成物(上記式(102)で表される構造を含有する側鎖と、上記側鎖(iii)を主として有するエラストマー性ポリマー(なお、側鎖(i)及び/又は側鎖(ii)を有し得る。)、並びに、老化防止剤を含む組成物:有機化クレイなし)を調製した。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等を表1に示す。
三井化学社製のオレフィン系熱可塑性エラストマー(商品名「ミラストマー 7030NS」)をそのまま、比較のための熱可塑性エラストマー組成物として利用した。かかる熱可塑性エラストマー組成物の特性の評価結果等を表1に示す。
先ず、無水マレイン酸変性エチレン-ブテン共重合体(三井化学社製の商品名「タフマーMH5020」)100gおよび老化防止剤(BASF社製の商品名「Irganox1010」)0.1gを加圧ニーダーに投入し、200℃で2分間素練りして可塑化させた後に、有機化クレイ(クニミネ工業社製の商品名「クニフィルD-36」)2gを更に加えて、200℃で4分間混練して混合物を得た。次いで、前記混合物に4H-3-アミノ-1,2,4-トリアゾール(ATA)を1.26g加え、200℃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。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等を表2に示す。
先ず、無水マレイン酸変性エチレン-ブテン共重合体(三井化学社製の商品名「タフマーMH5020」)100gおよび老化防止剤(BASF社製の商品名「Irganox1010」)0.1gを加圧ニーダーに投入し、200℃で2分間素練りして可塑化させた後に、有機化クレイ(クニミネ工業社製の商品名「クニフィルD-36」)2gを更に加えて、200℃で4分間混練して混合物を得た。次いで、前記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」)を1.31g加え、200℃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。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等を表2に示す。
先ず、無水マレイン酸変性エチレン-ブテン共重合体(三井化学社製の商品名「タフマーMH5020」)100gおよび老化防止剤(BASF社製の商品名「Irganox1010」)0.1gを加圧ニーダーに投入し、200℃で2分間素練りして可塑化させた後に、有機化クレイ(クニミネ工業社製の商品名「クニフィルD-36」)2gを更に加えて、200℃で4分間混練して混合物を得た。次いで、前記混合物に4H-3-アミノ-1,2,4-トリアゾール(ATA)0.378gおよび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」)0.917gを加えて、200℃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。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等を表2に示す。
先ず、無水マレイン酸変性エチレン-ブテン共重合体(三井化学社製の商品名「タフマーMH5020」)100gおよび老化防止剤(BASF社製の商品名「Irganox1010」)0.1gを加圧ニーダーに投入し、200℃で2分間素練りして可塑化させた後に、有機化クレイ(クニミネ工業社製の商品名「クニフィルD-36」)2gを更に加えて、200℃で4分間混練して混合物を得た。次いで、前記混合物に4H-3-アミノ-1,2,4-トリアゾール(ATA)0.252gおよび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」)1.048gを加えて、200℃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。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等を表2に示す。
実施例4で採用した方法と同様の方法を採用して得られた熱可塑性エラストマー組成物30gと、実施例5で採用した方法と同様の方法を採用して得られた熱可塑性エラストマー組成物70gとを混合して、熱可塑性エラストマー組成物とした。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等を表2に示す。
実施例4で採用した方法と同様の方法を採用して得られた熱可塑性エラストマー組成物20gと、実施例5で採用した方法と同様の方法を採用して得られた熱可塑性エラストマー組成物80gとを混合して、熱可塑性エラストマー組成物とした。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等を表2に示す。
実施例10~13においては、各原料化合物(無水マレイン酸変性エチレン-ブテン共重合体、老化防止剤、有機化クレイ、トリスヒドロキシエチルイソシアヌレート)の使用量を表3に示した量とした以外は下記方法と同様の方法を採用して、熱可塑性エラストマー組成物をそれぞれ製造した。すなわち、先ず、無水マレイン酸変性エチレン-ブテン共重合体(三井化学社製の商品名「タフマーMH5020」)および老化防止剤(BASF社製の商品名「Irganox1010」)を表3に示す割合で加圧ニーダーに投入し、200℃で2分間素練りして可塑化させた後に、有機化クレイ(クニミネ工業社製の商品名「クニフィルD-36」)を表3に示す割合で更に加えて、200℃で4分間混練して混合物を得た。次いで、前記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」)を表3に示す割合で加え、200℃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。得られた各熱可塑性エラストマー組成物の特性の評価結果等を表3に示す。
有機化クレイ(クニミネ工業社製の商品名「クニフィルD-36」)の代わりに、モンモリロナイト(クニミネ工業社製の商品名「クニピアF」:ケイ素及びアルミニウムを主成分とするクレイであって、ケイ素及びマグネシウムを主成分とするものではない。)を用いた以外は、実施例13と同様にして熱可塑性エラストマー組成物を調製した。得られた各熱可塑性エラストマー組成物の特性の評価結果等を表3に示す。
有機化クレイ(クニミネ工業社製の商品名「クニフィルD-36」)の代わりに、ケイ素及びマグネシウムを主成分とするクレイである合成クレイ(サポナイト:クニミネ工業社製の商品名「スメクトンSA」)を用いた以外は、実施例13と同様にして熱可塑性エラストマー組成物を調製した。得られた各熱可塑性エラストマー組成物の特性の評価結果等を表3に示す。
無水マレイン酸変性エチレン-プロピレン共重合体(三井化学社製の商品名「タフマーMMP0620」)100gおよび老化防止剤(BASF社製の商品名「Irganox1010」)0.1gを加圧ニーダーに投入し、200℃で2分間素練りして可塑化させた後に、有機化クレイ(クニミネ工業社製の商品名「クニフィルD-36」)2gを更に加えて、200℃で4分間混練して混合物を得た。次いで、前記混合物に4H-3-アミノ-1,2,4-トリアゾール(ATA:アミノトリアーゾール)を1.26g加え、200℃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。
無水マレイン酸変性エチレン-プロピレン共重合体(三井化学社製の商品名「タフマーMMP0620」)100gを加圧ニーダーに投入し、200℃で2分間素練りして可塑化させた後に、4H-3-アミノ-1,2,4-トリアゾール(ATA)を1.26g加え、200℃で8分間混合し、その後、更に有機化クレイ(クニミネ工業社製の商品名「クニフィルD-36」)5gを加えて、200℃で4分間混練して、熱可塑性エラストマー組成物を調製した。
<モジュラスの測定>
実施例16及び17で得られた熱可塑性エラストマー組成物をそれぞれ用い、該組成物を200℃で10分間熱プレスし、1mm厚のシートを調製した。次いで、得られたシートから3号ダンベル状の試験片を打ち抜き、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[MPa]、200%モジュラス[MPa]、300%モジュラス[MPa]、400%モジュラス[MPa]、500%モジュラス[MPa]を測定した。得られた結果を表4に示す。
実施例1、2、11、16、17で得られた各熱可塑性エラストマー組成物をそれぞれ10g準備して試料とし、その試料の表面をそれぞれ、透過型電子顕微鏡(日本電子社製の商品名「JEM-2010」)を用いて観測した。すなわち、前記透過型電子顕微鏡を用い、倍率を5万倍にして、各熱可塑性エラストマー組成物10g(試料)の表面上において、5.63μm2の大きさの測定点を3点づつ、それぞれ測定した。実施例1、2、11、16、17で得られた各熱可塑性エラストマー組成物の透過型電子顕微鏡をそれぞれ図1(実施例1)、図2(実施例2)、図3(実施例11)、図4(実施例16)、図5(実施例17)に示す。
Claims (16)
- 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)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、
クレイと、
を含有してなり、前記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質量部以下である、熱可塑性エラストマー組成物。 - 前記エラストマー性ポリマー(B)の側鎖に含有される水素結合性架橋部位が、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。
- 前記クレイが、ケイ素及びマグネシウムを主成分とするクレイ、並びに、有機化クレイ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又は2に記載の熱可塑性エラストマー組成物。
- 前記クレイが有機化クレイである、請求項1~3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。
- 前記エラストマー性ポリマー(B)の側鎖に含有される前記共有結合性架橋部位における架橋が、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つの結合により形成されてなる、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。
- 前記含窒素複素環が5員環及び/又は6員環である、請求項1~7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。
- 前記含窒素複素環がトリアゾール環、チアジアゾール環、ピリジン環、イミダゾール環、トリアジン環、イソシアヌレート環及びヒダントイン環の中から選択される少なくとも1種である、請求項1~8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。
- 前記エラストマー性ポリマー(B)の側鎖に含有される前記共有結合性架橋部位における架橋が、環状酸無水物基と、水酸基あるいはアミノ基及び/又はイミノ基との反応により形成される、請求項1~9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。
- 前記エラストマー性ポリマー(A)~(B)の主鎖がそれぞれ、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1~10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、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種であり、且つ、
前記クレイが有機化クレイである、請求項1又は11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中にクレイ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第二工程と、
を含み、
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(a)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、
クレイと、
を含有してなる組成物であり、かつ、
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中にクレイを混合する、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が無水マレイン酸変性エラストマー性ポリマーである、請求項13に記載の熱可塑性エラストマー組成物の製造方法。
- 前記化合物(I)及び/又は(II)として、前記環状酸無水物基と反応して水素結合性架橋部位及び共有結合性架橋部位の双方を形成する化合物を利用する、請求項13又は14に記載の熱可塑性エラストマー組成物の製造方法。
- 前記原料化合物が水酸基、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、並びに、ポリエーテルポリオールのうちの少なくとも1種の化合物であり、
前記エラストマー成分が、前記無水マレイン酸変性エラストマー性ポリマーと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種であり、かつ、
前記クレイが、有機化クレイである、請求項14に記載の熱可塑性エラストマー組成物の製造方法。
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TWI718137B (zh) | 2021-02-11 |
EP3279270A1 (en) | 2018-02-07 |
JP2016193970A (ja) | 2016-11-17 |
CN107406683A (zh) | 2017-11-28 |
EP3279270A4 (en) | 2018-12-12 |
US20180079887A1 (en) | 2018-03-22 |
JP5918878B1 (ja) | 2016-05-18 |
KR20170133407A (ko) | 2017-12-05 |
TW201718772A (zh) | 2017-06-01 |
CN107406683B (zh) | 2020-09-01 |
KR102438598B1 (ko) | 2022-08-31 |
MA41861A (fr) | 2018-02-06 |
US10793697B2 (en) | 2020-10-06 |
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