TW201922893A - Elastomer resin composition and molded object - Google Patents

Abstract

An elastomer resin composition which comprises an elastomer resin (A), a polypropylene-based resin (B) having a melting endotherm ([DELTA]H-D) of 0-80 J/g, and an additive (D), the melting endotherm being obtained from a melting endotherm curve obtained using a differential scanning calorimeter (DSC) by holding a sample in a nitrogen atmosphere at -10 DEG C for five minutes and then heating the sample at a rate of 10 DEG C/min, wherein the elastomer resin (A) is contained in an amount of 50-99.5 mass% and the polypropylene-based resin (B) is contained in an amount of 0.5-50 mass%, per 100 mass% the sum of the elastomer resin (A) and the polypropylene-based resin (B), the elastomer resin composition showing no flowability at 230 DEG C.

Description

Elastomer resin composition and formed body

The present invention relates to an elastomer resin composition and a molded body comprising the elastomer resin composition.

In an elastomer used in various fields such as automobiles, machinery, and electrical products, additives such as oil are prepared in order to improve mechanical properties, workability, and the like. For example, the anti-vibration rubber member described in Patent Document 1 contains a bleed lubricant, and seeks to control the oil bleed property in order to impart slidability. However, in order to control oil permeability, it is necessary to precisely control the microstructure of the elastomer composition.

On the other hand, when an elastomer product is exposed to the atmosphere, there are problems in that numerous cracks are generated on the surface of the product due to the influence of ozone in the atmosphere. Therefore, an elastomer product excellent in ozone resistance is required. Prior Technical Literature Patent Literature

Patent Document 1: Japanese Patent Laid-Open Publication No. 2013-11328

[The problem that the invention wants to solve]

The problem to be solved by the present invention is to provide a crosslinked elastomer resin composition excellent in ozone resistance and a molded body comprising the elastomer resin composition. [Technical means to solve the problem]

The present inventors have conducted intensive studies to solve the above problems, and as a result, have found that the problem can be solved by the following invention. That is, the invention of the present invention relates to the following. [1] An elastomer resin composition comprising: an elastomer resin (A); and a polypropylene resin (B) having a melting heat absorption (ΔH-D) of 0 J/g or more obtained according to a melting endothermic curve. And 80 J/g or less, the melting endothermic curve is obtained by using a differential scanning calorimeter (DSC), maintaining the sample at -10 ° C for 5 minutes in a nitrogen atmosphere, and then raising the temperature at 10 ° C / min; And the additive (D); and the elastomer resin composition contains 100% by mass or more of the total amount of the elastomer resin (A) and the polypropylene resin (B), and the elastomer resin (A) is 50% by mass or more. In addition, the above-mentioned polypropylene resin (B) is 0.5% by mass or more and 50% by mass or less, and does not exhibit fluidity at 230 °C. [2] The elastomer resin composition according to the above [1], wherein the polypropylene resin (B) satisfies the following (1). (1) No melting point (Tm-D) or melting point (Tm-D) is observed to be 0 ° C or more and 120 ° C or less, and the above melting point (Tm-D) is defined by using a differential scanning calorimeter (DSC). After the sample was kept at -10 ° C for 5 minutes in a nitrogen atmosphere, the peak of the melting endothermic curve obtained at the highest temperature side was obtained by raising the temperature at 10 ° C / min. [3] The elastomer resin composition according to [1] or [2], wherein the polypropylene resin (B) has an ultimate viscosity [?] of 0.01 dL/g or more and 2.50 dL/g or less. [4] The elastomer resin composition according to any one of the above [1], wherein the polypropylene resin (B) contains more than 0 mol% and is 20 mol% or less selected from At least one structural unit of a group consisting of ethylene and an α-olefin having 4 to 30 carbon atoms. [5] The elastomer resin composition according to any one of [1] to [4] wherein the elastomer resin (A) is derived from a material selected from the group consisting of styrene, a diene, a ruthenium-containing monomer, and the like. A structural unit of at least one of a group consisting of a fluorine monomer, ethylene, and isoprene. [6] The elastomer resin composition according to [5] above, wherein the diene is selected from the group consisting of butadiene, isoprene, β-farnesene, cyclopentadiene, and dicyclopentadiene. And at least one of the group consisting of 5-ethylidene-2-norbornene and 1,4-hexadiene. [7] The elastomer resin composition according to any one of [1] to [5] wherein the elastomer resin (A) comprises a structural unit derived from styrene. [8] The elastomer resin composition according to any one of [1] to [5] wherein the elastomer resin (A) is a copolymer of styrene and a conjugated diene. [9] The elastomer resin composition according to any one of [1] to [5] wherein the elastomer resin (A) is an ethylene-propylene-nonconjugated diene copolymer rubber. [10] The elastomer resin composition according to any one of the above [1], wherein the elastomer resin (A) is a conjugated diene rubber. [11] The elastomer resin composition according to any one of [1] to [10] wherein the additive (D) contains an oil. [12] A molded article comprising the elastomer resin composition according to any one of the above [1] to [11]. [Effects of the Invention]

The elastomer resin composition of the present invention is excellent in ozone resistance. Further, the elastomer resin composition of the present invention can control the bleeding of the additive, and the surface of the resin composition can be coated with the exuded additive to improve ozone resistance.

The elastomer resin composition of the present embodiment contains an elastomer resin (A) and a polypropylene resin (B) having a melting heat absorption (ΔH-D) obtained by a melting endothermic curve of 0 J/g or more and 80. Below J/g, the above melting endothermic curve is obtained by using a differential scanning calorimeter (DSC) to hold the sample at -10 ° C for 5 minutes under nitrogen atmosphere, and then raising the temperature at 10 ° C / min; (D), the elastomer resin composition contains 100% by mass of the total amount of the elastomer resin (A) and the polypropylene resin (B), and the elastomer resin (A) is 50% by mass or more and 99.5% by mass. % or less and the above-mentioned polypropylene-based resin (B) are 0.5% by mass or more and 50% by mass or less, and fluidity is not exhibited at 230 °C.

<Elastomer resin (A)> The elastomer resin (A) used in the present embodiment is not particularly limited, and various known olefin rubbers can be used. Here, in terms of elastic reproducibility, the elastomer resin (A) preferably comprises a material selected from the group consisting of styrene, a diene, a ruthenium-containing monomer, a fluorine-containing monomer, ethylene, and isoprene. At least one structural unit of the group, wherein the structural unit derived from styrene or diene is excellent in balance of heat resistance, moldability, and elastic reproducibility.

Examples of the diene include conjugated dienes such as butadiene, isoprene, and β-farnesene; cyclopentadiene, dicyclopentadiene, and 5-ethylidene-2-norbornene; a non-conjugated diene such as 4-hexadiene. The diene is preferably selected from the group consisting of butadiene, isoprene, β-farnesene, cyclopentadiene, dicyclopentadiene, 5-ethylidene-2-norbornene, and 1,4-hexene. At least one of the group consisting of diene.

Examples of the elastomer resin (A) include a copolymer of styrene and a conjugated diene, and a hydrogenated product thereof, an ethylene-α-olefin copolymer rubber, a conjugated diene rubber, a butadiene rubber, and a nitrile. Rubber, etc. Further, an ethylene-α-olefin-non-conjugated polyene copolymer rubber containing ethylene, an α-olefin having 3 to 20 carbon atoms, and a non-conjugated polyene may be mentioned, and specific examples thereof include ethylene-propylene- Non-conjugated diene copolymer rubber. The elastomer resin (A) is preferably a copolymer of styrene and a conjugated diene, or an ethylene-propylene-nonconjugated diene copolymer rubber.

The ethylene-α-olefin-non-conjugated polyene copolymer rubber is preferably an amorphous random copolymer comprising ethylene, an α-olefin having 3 to 20 carbon atoms, and a non-conjugated polyene. An olefin-based copolymer rubber which is mixed with a peroxide and kneaded under heating to crosslink to lower the fluidity or become non-flowing. Specific examples of such an olefin-based copolymer rubber include an ethylene-α-olefin-nonconjugated diene copolymer rubber [ethylene/α-olefin (mole ratio)=about 90/10 to 50/50]. Preferred is an ethylene-α-olefin-nonconjugated diene copolymer rubber [ethylene/α-olefin (mole ratio) = 90/10 to 51/49].

Specific examples of the non-conjugated diene include non-conjugated diene such as dicyclopentadiene, 1,4-hexadiene, cyclooctadiene, methylene norbornene, and ethylene norbornene. Alkene and the like. Among these, ethylene-propylene-non-conjugated diene copolymer rubber, ethylene, 1-butene, non-conjugated diene copolymer rubber, and especially ethylene-propylene-nonconjugated diene copolymer are preferable. Rubber, among which ethylene-propylene-ethylene decene copolymer rubber is particularly preferred.

Further, specific examples of the non-conjugated polyene other than the non-conjugated diene include 6,10-dimethyl-1,5,9-undecanetriene and 5,9-dimethyl-1. ,4,8-nonanetriene, 6,9-dimethyl-1,5,8-nonanetriene, 6,8,9-trimethyl-1,5,8-nonanetriene, 6-B Benzyl-10-methyl-1,5,9-undecanetriene, 4-ethylidene-1,6-octadiene, 7-methyl-4-ethylidene-1,6-octane Alkene, 7-methyl-4-ethylidene-1,6-decadiene, 7-ethyl-4-ethylidene-1,6-decadiene, 6,7-dimethyl-4- Ethylene-1,6-octadiene, 6,7-dimethyl-4-ethylidene-1,6-decadiene, 4-ethylene-1,6-decadiene, 7- Methyl-4-ethylidene-1,6-decadiene, 7-methyl-6-propyl-4-ethylidene-1,6-octadiene, 4-ethylene-1,7 a non-conjugated triene such as decadiene, 8-methyl-4-ethylidene-1,7-decadiene or 4-ethylidene-1,7-undecenediene.

The Muni viscosity [ML (1+4), 125 ° C] of the ethylene-α-olefin-non-conjugated polyene copolymer rubber is preferably 5 or more, more preferably 20 or more, from the viewpoint of balance between formability and physical properties. And, it is preferably 150 or less, more preferably 100 or less. Further, the ethylene-α-olefin-nonconjugated polyene copolymer rubber preferably has an iodine value of 10 or less. If the iodine value is in this range, a partially balanced thermoplastic elastomer composition can be obtained.

Specific examples of the elastomer resin (A) include ethylene-propylene-diene rubber (EPDM), styrene-butadiene rubber (SBR), butadiene rubber (BR), and chloroprene rubber (CR). ), isoprene rubber (IR), acrylonitrile-butadiene rubber (NBR), styrene-isoprene copolymer, butadiene-isoprene copolymer, polybutadiene, styrene - isoprene-butadiene terpolymer, acrylonitrile-chloroprene rubber (ACR), butyl rubber (IIR), styrene-butadiene-styrene block copolymer (SBS), Styrene-ethylene-butylene-styrene block copolymer (SEBS), styrene-butadiene-butene-styrene block copolymer (SBBS), styrene-ethylene-propylene-styrene block copolymerization (SEPS), styrene-ethylene-ethylene-propylene-styrene block copolymer (SEEPS), styrene-ethylene-propylene-styrene block copolymer (SEPS), styrene-isoprene-benzene Ethylene block copolymer (SIS), styrene-ethylene-propylene copolymer (SEP), and the like. Further, these may also be modified by an oxygen-containing unsaturated ethylenic monomer. Further, specific examples of the elastomer resin (A) include natural rubber (NR), ethylene-propylene rubber (EPR), styrene-isoprene-butadiene rubber (SIBR), and ethylene-acrylic rubber. (EA), polypyrene rubber, chlorosulfonated polyethylene (CSM), polyurethane rubber, epichlorohydrin rubber, propylene oxide rubber, acrylic rubber, chlorinated polyethylene, fluorenone rubber, Fluororubber, etc.

As a commercial product of the styrene-based elastomer resin, "D series" and "G series" manufactured by Clayton Co., Ltd., "TR series" and "Dynaron" manufactured by JSR (shares), and manufactured by Asahi Kasei Co., Ltd. Tufprene, "Asaprene", "Tuftec", "Septon" and "HYBRAR" manufactured by Kuraray Co., Ltd.

The content of the elastomer resin (A) in the elastomer resin composition is 50% by mass or more and 99.5% by mass or less based on 100% by mass of the total of the elastomer resin (A) and the polypropylene resin (B). When the amount is less than 50% by mass, the elastomeric property of the elastomer resin composition is lowered. When the amount is more than 99.5% by mass, the control of the bleeding of the additive of the elastomer resin composition becomes difficult. In view of the above, the content of the elastomer resin (A) is preferably 60% by mass or more, and more preferably 65% by mass based on 100% by mass of the total of the elastomer resin (A) and the polypropylene resin (B). % or more is more preferably 70% by mass or more, and is preferably 99% by mass or less, more preferably 98% by mass or less, still more preferably 95% by mass or less.

<Polypropylene-based resin (B)> The polypropylene-based resin (B) used in the present embodiment has a melting heat absorption (ΔH-D) obtained by a melting endothermic curve of 0 J/g or more and 80 J/g or less. The melting endothermic curve was obtained by using a differential scanning calorimeter (DSC) to hold the sample at -10 ° C for 5 minutes in a nitrogen atmosphere and then raising the temperature at 10 ° C / min. When the heat of fusion (ΔH-D) is less than 0 J/g, the bleeding of the additive cannot be controlled in the elastomer resin composition, and if it exceeds 80 J/g, the flexibility of the elastomer resin composition is lowered. Hey. From this point of view, the heat of fusion (ΔH-D) is preferably 20 J/g or more, more preferably 25 J/g or more, still more preferably 27 J/g or more, and still more preferably 30 J/g. The above is preferably 50 J/g or less, more preferably 45 J/g or less, still more preferably 40 J/g or less. The melting heat absorption amount (ΔH-D) is obtained by determining a melting endothermic curve obtained by DSC measurement by using a line connecting a point on the low temperature side where no heat is changed and a point on the high temperature side where no heat is changed as a reference line. The line portion of the peak observed on the highest temperature side is calculated from the area surrounded by the reference line. Further, the heat of fusion (ΔH-D) can be controlled by appropriately adjusting the monomer concentration or the reaction pressure.

The polypropylene resin (B) preferably satisfies the following (1). (1) No melting point (Tm-D) or melting point (Tm-D) is observed to be 0 ° C or more and 120 ° C or less, and the above melting point (Tm-D) is defined by using a differential scanning calorimeter (DSC). After the sample was kept at -10 ° C for 5 minutes in a nitrogen atmosphere, the peak top observed on the highest temperature side of the melting endothermic curve was obtained by raising the temperature at 10 ° C / min.

The melting point (Tm-D) of the polypropylene resin (B) is preferably not observed or is 0 ° C or more from the viewpoint of improving the flexibility of the elastomer resin composition and controlling the bleeding of the additive (D). Below 120 °C. When the melting point is observed, from the same viewpoint, it is more preferably 30 ° C or more, further preferably 35 ° C or more, further preferably 40 ° C or more, and more preferably 100 ° C or less, and further preferably 90. It is below °C, and more preferably 85 °C or less. Further, the melting point can be controlled by appropriately adjusting the monomer concentration or the reaction pressure.

Further, the ultimate viscosity [η] of the polypropylene resin (B) is preferably 0.01 dL/g or more, more preferably 0.10 dL/g or more, still more preferably 0.30 dL/g or more, and still more preferably 0.40 dL/ g or more, and preferably 2.50 dL/g or less, more preferably 2.00 dL/g or less, further preferably 1.80 dL/g or less, further preferably 1.70 dL/g or less, and further preferably 1.00 dL/g. the following. By setting the ultimate viscosity [η] to 0.01 dL/g or more, the mixing property of the above elastomer resin (A) and polypropylene resin (B) can be further improved. Further, by setting it to 2.50 dL/g or less, the workability can be further improved. This is also the same, for example, in a resin composition containing a filler such as talc.

Further, the above-mentioned ultimate viscosity [?] was calculated in a tetralin at 135 ° C, and the specific viscosity (η _SP /c) was measured by a Ubbel viscometer, and was calculated by the following formula (Higkins type). η _SP /c=[η]+K[η] ² c η _SP /c(dL/g): specific viscosity [η](dL/g): ultimate viscosity c(g/dL): polymer viscosity K= 0.35 (Huggins constant)

The molecular weight distribution (Mw/Mn) of the polypropylene resin (B) is preferably 3.0 or less, more preferably 2.8 or less, still more preferably 2.6 or less, still more preferably 2.5 or less, and still more preferably 1.5 or more. It is 1.6 or more, more preferably 1.7 or more, still more preferably 1.8 or more. By setting the molecular weight distribution (Mw/Mn) within the above range, the flexibility of the elastomer resin composition can be further improved, and the stickiness of the elastomer resin composition can be further suppressed. Further, in the present embodiment, the molecular weight distribution (Mw/Mn) is a value calculated from a polystyrene-equivalent weight average molecular weight Mw and a number average molecular weight Mn measured by a gel permeation chromatography (GPC) method. .

The melting heat absorption amount (ΔH-D) of the polypropylene resin (B) is not particularly limited as long as it satisfies the above range. For example, it is preferably selected from the group consisting of a propylene homopolymer, a propylene-ethylene block copolymer, and a propylene-butyl group. Alkene block copolymer, propylene-α-olefin block copolymer, propylene-ethylene random copolymer, propylene-butene random copolymer, propylene-ethylene-butylene ternary random copolymer, propylene-α- The propylene-based polymer such as an olefin random copolymer or a propylene-α-olefin graft copolymer is more preferably selected from the group consisting of a propylene homopolymer, a propylene-ethylene random copolymer, and a propylene-butene random copolymer. A propylene-based polymer of a propylene-α-olefin random copolymer or a propylene-ethylene-butylene ternary random copolymer is further preferably a propylene homopolymer.

When the polypropylene resin (B) is a copolymer, it is preferable to contain more than 0 mol% from the viewpoint of suppressing generation of irregularities due to crosslinking and improving the flexibility of the elastomer resin composition. Further, it is at least one structural unit selected from the group consisting of ethylene and an α-olefin having 4 to 30 carbon atoms, which is 20 mol% or less. More preferably, it is 0.5 mol% or more, more preferably 1.0 mol% or more, and still more preferably 18.5 mol% or less, further preferably 15.0 mol% or less, and still more preferably 10.0. Mole% or less.

Further, when the polypropylene resin (B) is a copolymer containing an olefin having 2 carbon atoms, the structural unit of the olefin having 2 carbon atoms (i.e., ethylene monomer) is preferably more than 0 mol% and is 20 mol% or less, more preferably more than 0 mol% and 18 mol% or less, further preferably more than 0 mol% and 16 mol% or less, and more preferably more than 0 mol% and more 14 moles below. Further, in the case of a copolymer containing an α-olefin having 4 or more carbon atoms, the α-olefin content having 4 or more carbon atoms is preferably more than 0 mol% and 30 mol% or less, more preferably more than 0 mol. The ear % is 25 mol% or less, more preferably more than 0 mol% and 20 mol% or less.

A commercially available product can be used as the polypropylene resin (B). As a specific example, "S400", "S600", and "S901" of "L-MODU" (registered trademark) (manufactured by Idemitsu Kosan Co., Ltd.) can be cited. As a commercial product of the amorphous poly-α-olefin, REXtac, LLC's "REXtac", Evonik's "Vestoplast", Eastman's "Eastoflex", "Aerafin", etc. name). As a commercial item of the propylene-based elastomer, "Tafmer XM", "Tafmer PN", "Tafmer SN" manufactured by Mitsui Chemicals Co., Ltd.; "Tafthren" manufactured by Sumitomo Chemical Co., Ltd.; Prime Polymer (shares) "Prime TPO" manufactured; "Versify" manufactured by Dow Chemical; "Vistamaxx" and "Linxar" manufactured by Exxon Mobil; "Licocene" manufactured by Clariant; "Adflex" manufactured by Basell, etc. For the product name). In particular, when "L-MODU" is used as the polypropylene-based resin (B), the coating layer formed on the surface of the resin composition which is oozing out has a higher transparency than the wax and is excellent in appearance. In addition, in the case of using the "L-MODU", the mechanical strength of the coating layer is also high in toughness, and is not brittle as compared with the case of using the wax, so that cracking is less likely to occur and durability is higher.

The polypropylene resin (B) can be obtained by polymerizing a monomer in the presence of a polymerization catalyst such as a Ziegler-Natta type catalyst or a metallocene catalyst. Among them, the polypropylene resin (B) is preferably a polypropylene resin obtained by a metallocene catalyst. The metallocene catalyst is one of the homogeneous catalysts, and the obtained polymer becomes a uniform polymer having a narrow molecular weight distribution or a narrow composition distribution.

The content of the polypropylene resin (B) in the elastomer resin composition is 0.5% by mass or more and 50% by mass or less based on 100% by mass of the total of the elastomer resin (A) and the polypropylene resin (B). When the amount is less than 0.5% by mass, the flexibility of the elastomer resin composition is lowered. When the amount is more than 50% by mass, the elastic reproducibility of the elastomer resin composition is lowered. In this view, the content of the polypropylene resin (B) is preferably 1% by mass or more, and more preferably 2%, based on 100% by mass of the total of the elastomer resin (A) and the polypropylene resin (B). The mass% or more is more preferably 5% by mass or more, and is preferably 40% by mass or less, more preferably 35% by mass or less, and still more preferably 30% by mass or less.

The total content of the elastomer resin (A) and the polypropylene resin (B) in the elastomer resin composition is preferably 35 mass% or more, and more preferably 50 mass%, based on 100% by mass of the elastomer resin composition. The above is more preferably 70% by mass or more, and still more preferably 75% by mass or more.

<Polypropylene-based resin (C)> The elastomer resin composition of the present embodiment further preferably contains a polypropylene resin having a melting point (Tm-D) of more than 120 ° C and 180 ° C or less (in terms of strength). C), the above melting point (Tm-D) is defined as the temperature is raised at 10 ° C / min after holding the sample at -10 ° C for 5 minutes in a nitrogen atmosphere by using a differential scanning calorimeter (DSC). The peak top observed on the highest temperature side of the melting endotherm curve obtained. The melting point (Tm-D) of the polypropylene resin (C) is preferably 130 ° C or higher, more preferably 140 ° C or higher, and is preferably 170 ° C or lower, more preferably 165 ° C or lower. When the melting point of the polypropylene resin (C) is within the above range, it is preferable from the viewpoint of maintaining the hardness at a high temperature.

The polypropylene-based resin (C) is preferably selected from the group consisting of a propylene homopolymer, a propylene-ethylene block copolymer, a propylene-butene block copolymer, a propylene-α-olefin block copolymer, and propylene-ethylene. A propylene-based polymer (C') such as a copolymer, a propylene-butene random copolymer, a propylene-α-olefin random copolymer, or a propylene-α-olefin graft copolymer.

Further, from the viewpoint of the rigidity of the obtained molded body, the propylene-based polymer (C') preferably has a content of the ethylene structural unit contained in the polymer of 1 mol% or less, more preferably an ethylene-free structural unit. A propylene homopolymer. Further, the above polymer may be a polymer using a monomer derived from petroleum or coal, or a polymer using a monomer derived from a raw material.

When the elastomer resin composition of the present embodiment contains the polypropylene resin (C), the content thereof is preferably 5% by mass or more, more preferably 8% by mass or more, based on 100% by mass of the elastomer resin composition. It is preferably 11% by mass or more, and more preferably 30% by mass or less, and still more preferably 20% by mass or less. When it is 5% by mass or more, the strength of the composition can be expected to be improved, and if it is 30% by mass or less, the flexibility is not impaired.

<Other thermoplastic resin> In the elastomer resin composition of the present embodiment, part or all of the elastomer resin (A) or one or all of the polypropylene resin (C) may be replaced with the elastomer according to the purpose. A thermoplastic resin other than the resin (A) and the above polypropylene resin (C). Specific examples of the other thermoplastic resin are not particularly limited, and examples thereof include acrylic resins such as polymethyl acrylate, polymethyl methacrylate, and ethylene-ethyl acrylate copolymer, polystyrene resin, nylon 6, and nylon 66. Saturated ester resin such as polyacrylamide resin such as nylon 12, polyimide resin, acetate resin, polyether sulfonate resin, polyethylene terephthalate or polybutylene terephthalate A fluoroethylene resin such as polycarbonate, a thermoplastic polyurethane resin, a thermoplastic elastomer, a vinyl chloride resin, a polyvinyl fluoride or a polyvinylidene fluoride, or an anthrone resin.

<Additive (D)> The elastomer resin composition of the present embodiment contains the additive (D). The type of the additive is appropriately determined depending on the purpose of use of the elastomer resin composition. The additive (D) preferably contains an oil, for example, from the viewpoint of flexibility or lubricity. The elastomer resin composition of the present embodiment may contain one type of additive or may contain two or more types of additives.

(Oil) The oil is not particularly limited, and examples thereof include mineral oils such as paraffin-based processing oils, naphthenic processing oils, and isoparaffin oils, aromatic mineral oils, polybutenes, and polybutenes. a synthetic resin-based hydrocarbon such as a low molecular weight substance such as a diene or a poly(α-olefin), a fatty oil softener such as alkylbenzene or castor oil, linseed oil, rapeseed oil or coconut oil, or dibutyl phthalate. An ester plasticizer such as dioctyl phthalate, dioctyl adipate or dioctyl sebacate. Among them, mineral oil-based hydrocarbons, paraffin-based processed oils, and naphthenic processed oils are preferably used. It is particularly preferred to be a paraffinic oil having a carbon number of paraffinic hydrocarbons of 50% of the total carbon number. Further, the weight average molecular weight of the mineral oil-based hydrocarbon is preferably from 50 to 2,000, particularly preferably from 100 to 1,500, and the dynamic viscosity at 40 ° C is preferably from 3 to 800 cSt, particularly preferably from 5 to 600 cSt, and further preferably a flow point is obtained. It is -40 to 0 ° C, particularly preferably -30 to 0 ° C, and the ignition point (COC method) is preferably 200 to 400 ° C, particularly preferably 250 to 350 ° C. Further, the dynamic viscosity is a value measured according to ISO 3104, the flow point is a value measured in accordance with JIS K2269:1987, and the ignition point is a value measured in accordance with JIS K2265-4:2007 (ASTM-D92, Kelvin open cup type).

As a commercial product of the paraffin-based processing oil, "Diana Process Oil PW-32", "Diana Process Oil PW-90", "Diana Process Oil PW-150", "Diana" manufactured by K.K. Process Oil PS-32", "Diana Process Oil PS-90", "Diana Process Oil PS-430"; "Kaydol Oil" and "ParaLux Oil" manufactured by Chevron USA (both trade names).

Examples of the additives other than the oil include surface modifiers; anti-aging agents (amine, phenol, sulfur, phosphorus, and wax); vulcanizing agents; vulcanization accelerators (sulfinamide, thiuram) , thiazole series, lanthanide series; zinc white and other vulcanization accelerators; vulcanization inhibitors; mastic accelerators; white fillers; coupling agents; free radical generators; polyolefins; slip agents; anti-blocking agents; Stabilizer; antioxidants such as phenolic antioxidants, phosphite antioxidants, thioether antioxidants; light stabilizers; ultraviolet absorbers; crystal nucleating agents; anti-blocking agents; seal improvers; stearic acid , release agent such as ketone oil; lubricant such as polyethylene wax; colorant; ceramic, carbon black, brown earth, rich iron loess, kaolin, titanium nickel yellow, cobalt blue, masterbatch ash, quinophthalone, pyrrole Pigments such as pyrrole dione, quinacridone, diterpene, phthalocyanine blue, phthalocyanine green; talc, ceria, calcium carbonate, magnesium carbonate, aluminum hydroxide, barium sulfate, glass fiber, carbon fiber, synthetic fiber Inorganic hollow fillers such as natural fibers, glass powder, and glass hollow spheres; Inorganic fillers such as porcelain powder, mica, alumina, talc, calcium carbonate, ash stone, clay; organic fillers such as cork powder, wood powder, graphite; foaming agent; hydrated compound, red phosphorus, ammonium polyphosphate, Flame retardants such as hydrazine and fluorenone; antistatic agents; antibacterial agents; adhesion promoters such as dispersants, phase solvents, and rosin derivatives (tackifiers); "LEOSTOMER (registered trademark) B" (trade name, Rikentechnos) ) manufacturing) an adhesive elastomer; scented scented resin, scented scented enamel resin, phenolphthalein resin, and the like.

Examples of the antioxidant include tris(nonylphenyl)phosphite, distearyl pentaerythritol diphosphite, Adekastab 1178 (made by ADEKA Co., Ltd., "Adekastab" is a registered trademark), and Sumilizer TNP (Sumitomo Chemical (" Manufactured by the company, "Sumilizer" is a registered trademark), Irgafos 168 (manufactured by BASF, "Irgafos" is a registered trademark), Sandostab P-EPQ (manufactured by Sandoz, "Sandostab" is a registered trademark), etc., 2 , 6-di-tert-butyl-4-methylphenol, 3-(3',5'-di-t-butyl-4'-hydroxyphenyl)propionic acid n-octadecyl ester, Irganox 1010 (BASF A phenolic antioxidant such as "Irganox" is a registered trademark), dilauryl 3,3'-thiodipropionate, pentaerythritol tetrakis(3-laurylthiopropionate), Sumilizer TPL (Sumitomo Chemical ( It is a sulfur-based antioxidant such as DSTP "Yoshitomi" (manufactured by Mitsubishi Chemical Co., Ltd., "Yoshitomi" is a registered trademark), Antiox L (made by Nippon Oil Co., Ltd., "Antiox" is a registered trademark).

The elastomer resin composition of the present embodiment can be foamed. Examples of the foaming agent include carbon dioxide gas and nitrogen; azo compounds such as azobisisobutyronitrile, azodimethylamine, and azobiscarboxylate; and N,N'-dinitrosium penta N-nitroso compounds such as tetramine, trimethylenetrinitroamine; p-toluenesulfonate, diphenylguanidine-3,3'-disulfonium, 4,4'-oxybis(benzenesulfonate) Sulfonium compound such as 醯肼), allyl bis(sulfonate); sulfonium sulfonium compound such as p-tolylsulfonium semicarbazone or 4,4'-oxybis(phenylsulfonium sulfonium) a compound. These may be used alone or in combination of two or more.

The content of the additive (D) in the case of the oil is preferably 10% by mass or more, more preferably 20% by mass or more, and further preferably 70% by mass or less, and more preferably 60% by mass based on 100% by mass of the elastomer resin composition. The mass% or less is more preferably 50% by mass or less. When it is 10% by mass or more, the effect by the additive can be expected, and if it is 70% by mass or less, the control of the bleeding of the additive can be expected.

Further, in the elastomer resin composition of the present embodiment, a crosslinking agent, a crosslinking assistant or the like can be added and partially crosslinked. Examples of the crosslinking agent include a phenolic vulcanizing agent such as an organic peroxide, sulfur, a sulfur compound, and a phenol resin. Among these, an organic peroxide is preferred. Specific examples of the organic peroxide include 2,5-dimethyl-2,5-di(t-butylperoxy)-hexane and 2,5-dimethyl-2,5-di. (t-butylperoxy)-3-hexyne; 2,5-dimethyl-2,5-bis(benzhydrylperoxy)-hexane; tert-butyl peroxybenzoate; Dicumyl peroxide; tert-butyl cumene peroxide; diisopropylbenzene hydroperoxide; 1,3-bis(t-butylperoxyisopropyl)benzene; benzoyl peroxide ; 1,1-di(t-butylperoxy)-3,3,5-trimethylcyclohexane; di-tert-butyl peroxide; 4,4-bis(t-butylperoxy N-butyl valerate; p-chlorobenzhydryl peroxide; 2,4-dichlorobenzhydryl peroxide; tert-butyl isopropyl peroxycarbonate; diethyl hydrazine peroxide; Among these, from the viewpoints of odor and coking stability, 2,5-dimethyl-2,5-di(t-butylperoxy)hexane, 2,5- is preferred. Dimethyl-2,5-di(t-butylperoxy)-3-hexyne, 1,3-bis(t-butylperoxyisopropyl)benzene, 1,1-double (first Tributylperoxy)-3,3,5-trimethylcyclohexane, 4,4-bis(t-butylperoxy)pentanoic acid n-butyl ester, of which the optimum is 1,3- Bis(t-butylperoxyisopropyl)benzene.

Further, examples of the crosslinking assistant include N-methyl-N,4-dinitrosoaniline, nitrosobenzene, diphenylguanidine, divinylbenzene, and trimethylolpropane tri(meth)acrylic acid. Ester, ethyl di(meth) acrylate, diethylene glycol di(meth) acrylate, allyl (meth) acrylate, diallyl phthalate, triallyl cyanurate, Bismuth, p,p'-dibenzimidylindole, bismaleimide, phenyl bismaleimide, trimethylolpropane-N, N'-metaphenyl Dimaleimide, ethylene glycol dimethacrylate, vinyl butyral, vinyl stearate, unsaturated decane compounds, sulfur, and the like. By using such a crosslinking assistant, a uniform and mild crosslinking reaction can be expected. Among these crosslinking assistants, triallyl cyanurate, ethylene glycol dimethacrylate, divinylbenzene, and bismaleimide are preferred. These are easy to handle, and have good compatibility with the elastomer resin (A) and the polypropylene resin (B) which are main components of the crosslinked processed material, and have an action of dissolving an organic peroxide, and exhibit organic peroxide. Since the dispersing agent functions as a dispersing agent, it is possible to obtain an elastomer resin composition in which the crosslinking effect by heat treatment is uniform and a balance between flexibility and physical properties is obtained.

The crosslinking agent and the crosslinking auxiliary agent may be used alone or in combination of two or more. In the case of using a crosslinking agent and a crosslinking auxiliary agent, the crosslinking degree can be adjusted arbitrarily in the range of 0.1 to 5 parts by mass based on 100 parts by mass of the total of the components (A) to (D). Further, when an unsaturated decane compound is used as the crosslinking assistant, the crosslinking can be further progressed by contact with moisture in the presence of a decyl alcohol condensation catalyst.

<Production of the elastomer resin composition> The elastomer resin composition of the present embodiment is added with the above-mentioned elastomer resin (A), polypropylene resin (B), and additive (D), and optionally polypropylene. The resin (C) is obtained by blending and melt-kneading. The elastomer resin composition of the present embodiment can be produced by a method for producing a vulcanized rubber. Further, the elastomer resin composition of the present embodiment can also be produced by a method for producing a thermoplastic resin composition. For example, the particles of the elastomer resin (A) and the polypropylene resin (B) may be dry-blended, and then placed in a hopper of an extruder to be melt-kneaded. Further, after the polypropylene resin (B) is produced by a polymerization apparatus, the particles of the elastomer resin (A) are added, and the mixture is melt-kneaded by using an extruder connected to a polymerization apparatus. Further, the elastomer resin (A) may be added in a state where the polypropylene resin (B) is present in a solvent, and a pellet or a block may be obtained by a solvent removal and drying step. Further, after the elastomer resin (A) is polymerized, the polypropylene resin (B) may be solution-mixed and desolventized before the solvent is degassed to produce the elastomer resin (A) and the polypropylene resin (B). combination. Thereafter, granulation can also be carried out as needed. The above-mentioned kneaded composition containing the elastomer resin (A) and the polypropylene resin (B), the additive (D), and optionally the polypropylene resin (C) may be used regardless of the granulation step. Mixed. By taking such a step, for example, when the additive (D) is an oil, when the elastomer resin (A) is kneaded with the oil, even if the elastomer resin (A) is not immersed in the oil in advance, two can be made. It is easy to carry out mixing. The kneading can be carried out using a commonly used machine, for example, a general mixing kneader such as a high speed mixer, a Banbury mixer, a continuous kneader, a uniaxial or biaxial extruder, a roll, a Brookfield tester, or the like. It is also possible to perform granulation using an extruder after kneading by a kneader other than an extruder.

<Physical Properties of Elastomer Resin Composition> The elastomer resin composition of the present embodiment does not exhibit fluidity at 230 ° C from the viewpoint of heat resistance. In the present invention, "the fluidity is not exhibited at 230 ° C" means a molded body of 5 mm × 5 mm × 1 mm thick which is obtained by hot press forming an elastomer resin composition by heating at 230 ° C under an oven atmosphere. Maintain shape at 15 minutes.

The elastomer resin combination of the present embodiment is excellent in ozone resistance. Since the durability is higher as the ozone resistance is higher, the evaluation of the crack state according to the attached document JA of JIS K6259-1:2015 is preferably not broken after 96 hours, and more preferably not reached "A- 5", "B-5" and "C-5", and preferably not "A-4", "B-4" and "C-4", and even better not "A-3" "B-3" and "C-3" are particularly good for "A-2", "B-2" and "C-2". Furthermore, as described in the attached document JA of JIS K6259-1:2015, the number and size of the combined cracks were evaluated. Regarding the number of cracks, it is evaluated in three grades of A, B, and C, and it is preferable to evaluate A which has less cracks. Further, the size of the crack is evaluated in five grades of 1 to 5, and it is preferable to evaluate the crack 1 which is small.

<Molded body> The molding system of the present invention contains the above resin composition. The resin composition can be molded by a known molding method, for example, by press molding using a mold to obtain a molded body having a desired shape. Further, the molded body can be obtained by molding the resin composition by rolling, laminating, die, extrusion, and press-molding, followed by heating and crosslinking. Example

The invention will be specifically described by way of examples, but the invention is not limited by the examples.

The materials used in the examples and comparative examples are as follows. <Elastomer resin (A)> ・(A-1) "Nordel (registered trademark) IP 4760P": ethylene-propylene-ethylene decene copolymer, manufactured by Dow Chemical Co., Ltd., ethylene unit content: 67% by weight, Ethylene norbornene unit content: 4.9 wt%, Mooney viscosity (ML (1+4), 125 ° C): 60 ・(A-2) "JSR IR2200": Polyisoprene rubber, manufactured by JSR (share) , Mooney viscosity (ML (1+4), 125 ° C): 82 ・(A-3) "JSR SL552": solution polymerization styrene butadiene rubber (S-SBR), manufactured by JSR (share), bonded styrene : 23.5%, vinyl bond amount: 33.5%, specific gravity: 0.94, Mui viscosity (ML (1+4), 125 ° C): 55 ・(A-4) natural rubber (NR), RSS3

<Polypropylene resin (B)> ・(B-1) "L-MODU S400": Polypropylene resin obtained by a metallocene catalyst, manufactured by Idemitsu Kosan Co., Ltd., melting heat absorption (ΔH) -D)=36 J/g, melting point (Tm-D)=80°C, ultimate viscosity [η]=0.51 dL/g, molecular weight distribution (Mw/Mn)=2.0

<Additive (D)> ・(D1-1) "Diana Process Oil PW-90": Paraffin-based oil, manufactured by Idemitsu Kosan Co., Ltd., with a dynamic viscosity of 40 cSt at 40 ° C, a flow point of -17.5 ° C, and a fire point of 266 °C ・(D1-2) "Diana Process Oil NS-100": naphthenic oil, manufactured by Idemitsu Kosan Co., Ltd., with a dynamic viscosity of 40 cSt at 40 ° C, a flow point of -37.5 ° C, and a fire point of 226 ° C. -1) Stearic acid, dispersant/lubricant, manufactured by Nippon Oil Co., Ltd., (D2-2) "Struktol EF44", dispersant/lubricant, manufactured by S&S Japan, (D3) zinc oxide (No.) (2 types), vulcanization accelerator, 堺Chemical Industry Co., Ltd., (D4-1) carbon black (High Abrasion Furnace), reinforcing agent, Mitsubishi Chemical Co., Ltd. D4-2) Carbon black (Super Abrasion Furnace), reinforcing agent, manufactured by Tokai Carbon (D4-3) "Nipsil VN3": cerium oxide, reinforcing agent, Tosoh Silica (Stock) Manufacture (D5-1) "SANCELER NS": sulfinamide (SA) vulcanization accelerator, N-(t-butyl)-2-benzothiazole sulfinamide (TBBS), three New Chemical Industry Co., Ltd. (D5-2) "Nocceler CZ": Sulfaguanamine (SA) is sulfur Promoter, N-cyclohexyl-2-benzothiazole sulfinamide, manufactured by Sanshin Chemical Industry Co., Ltd. (D5-3) "Nocceler D": lanthanide vulcanization accelerator, 1,3-diphenyl hydrazine , Sanshin Chemical Industry Co., Ltd. (D6) Sulfur, Vulcanizing Agent, Manufacturing of Sosui Chemical Industry Co., Ltd. (D7-1) "Sunnoc": Special Wax Anti-Aging Agent, Ouchi Emerging Chemical Industry Co., Ltd. Manufacture (D7-2) "Nocrac 6C": an aromatic secondary amine anti-aging agent, manufactured by Ouchi Shinko Chemical Co., Ltd. (D7-3) "Nocrac 224": an amine-ketone anti-aging agent, (D8) "Si 69": decane coupling agent, manufactured by Evonik, (D9) "Struktol AW-1", antistatic agent, manufactured by S&S Japan Co., Ltd.

<Crosslinking agent> ・"Perhexa 25B": 2,5-dimethyl-2,5-di(t-butylperoxy)hexane, manufactured by Nippon Oil Co., Ltd.

Further, the physical properties of the polypropylene resin (B-1) were measured by the following methods. [DSC measurement] The melting endothermic amount (ΔH-D) was determined from the melting endothermic curve, and the melting endothermic curve was tested by using a differential scanning calorimeter ("DSC-7", manufactured by Perkin Elmer Co., Ltd.). After maintaining at -10 ° C for 5 minutes under a nitrogen atmosphere, the temperature was raised at 10 ° C / min. Further, the melting point (Tm-D) was determined from the peak top of the peak observed on the highest temperature side of the obtained melting endothermic curve. Further, the heat of fusion (ΔH-D) is obtained by using a differential scanning calorimeter (Perkin) using a line connecting a point on the low temperature side where no heat is changed and a point on the high temperature side where no heat is changed as a reference line. The melting endothermic curve obtained by the DSC measurement of the "DSC-7" manufactured by Elmer Corporation is calculated by the area of the peak including the peak and the area surrounded by the reference line.

[Limited viscosity [η]] Using a viscometer (manufactured by Clutch Corporation, trade name: "VMR-053U-PC・F01"), Ubbelohde viscosity tube (measuring ball volume: 2 to 3 mL, capillary diameter: 0.44 to 0.48 mm), and a tetralin as a solvent, a solution of 0.02 to 0.16 g/dL was measured at 135 °C. [Molecular weight distribution (Mw/Mn)] The weight average molecular weight (Mw) and the number average molecular weight (Mn) were measured by a gel permeation chromatography (GPC) method, and the molecular weight distribution (Mw/Mn) was determined. The measurement was carried out using the following apparatus and conditions to obtain a weight average molecular weight and a number average molecular weight in terms of polystyrene. The molecular weight distribution (Mw/Mn) is a value calculated from the weight average molecular weight (Mw) and the number average molecular weight (Mn). <GPC measuring device> Column: "TOSO GMHHR-H(S)HT" manufactured by Tosoh (detector): Liquid chromatogram is used to detect "WATERS 150C" manufactured by Waters Corporation using refractive index (RI, Refractive Index) <Measurement conditions> Solvent: 1,2,4-trichlorobenzene Measurement temperature: 145 ° C Flow rate: 1.0 mL/min Sample concentration: 2.2 mg/mL Injection amount: 160 μL Calibration curve: Universal Calibration analysis program :HT-GPC (Ver.1.0)

(Evaluation) Measurement and evaluation of the properties of the elastomer resin composition and the pressurizing plate obtained in each of the examples and the comparative examples were carried out under the measurement conditions shown below.

(1) Oil bleed by sandwiching the pressure plate of the sample with a pre-measured weight of the blotting paper (65 mm × 97 mm), and sandwiching the sample sandwiched by the blotting paper by an aluminum plate (45 mm × 45 mm) Above. It was placed in a vat, and a weight of 0.5 kg was placed thereon, and it was set in a thermostat previously set to 70 °C. After 24 hours, the sample was taken out from the constant temperature bath, and after standing at room temperature for 24 hours, the weight of the oil-absorbing paper was measured, and the increased weight was taken as the weight of the oozing oil. If the weight of the oozing oil exceeds 0 g/m ² and is 0.40 g/m ² or less, it is judged to be acceptable.

(2) Tensile modulus The test piece of 200 mm × 15 mm short strips taken from the produced compression plate was used. The distance between the chucks was 150 mm and the tensile speed was 100 mm/min. Stretching, drawing the relationship line (curve) on the two-dimensional coordinate axis with the elongation (strain) as the horizontal axis and the stress as the vertical axis, and finding the slope of the relationship line before the drop point as the "tensile elastic modulus" "." Further, the higher the value of the tensile elastic modulus, the more excellent the rigidity of the pressure plate.

(3) Tensile breaking strength In the above (2) tensile elastic modulus measurement, it was calculated by dividing the stress at the time of breaking the sample by the cross-sectional area of the sample.

(4) Tensile elongation at break In the above (2) measurement of tensile modulus of elasticity, the elongation at break of the sample was taken as the tensile elongation at break.

(5) Shore A hardness is measured in accordance with JIS K6253-3: 2012 (type A).

(6) Flowability at 230 ° C The elastomer resin composition was subjected to hot press forming at 200 ° C for 4 minutes using a press machine to obtain a pressurizing plate of 15 mm × 15 mm × 1 mm in thickness. A sample of 5 mm × 5 mm × 1 mm thickness was cut out from the pressurizing plate. The glass tube oven (manufactured by Shibata Science Co., Ltd., "GTO-200 type") was previously heated to 230 ° C, and the sample was placed on an aluminum foil to be set. After heating for 15 minutes, it was visually observed whether or not the shape of the sample was maintained. The case where the shape of the sample was maintained was judged as "None: no fluidity was exhibited at 230 ° C", and the case where the shape of the sample was not maintained was judged as "there is: liquidity at 230 ° C".

(7) Ozone Deterioration Test The elastomer resin composition was subjected to hot press forming at 160 ° C for 12 minutes using a hot press (manufactured by Otake Machinery Co., Ltd.) to obtain a dumbbell-shaped No. 1 shape test piece. The static ozone deterioration test was carried out under the following conditions in accordance with JIS K6259-1:2015. Ozone concentration: 50±5 pphm Test temperature: 40±2°C Condition adjustment temperature: 23±2°C Tensile strain: 20% Using the test machine: “Ozone weathering test machine OMS-HE” (manufactured by Suga Test Instruments)

After the test piece was exposed to ozone, it was taken out from the test tank 24 hours later, 48 hours later, 72 hours later, and 96 hours after the start of the test, and the state of the crack was observed and recorded. The evaluation was carried out in accordance with the subsidiary document JA of JIS K6259-1:2015. Furthermore, as described in the attached document JA of JIS K6259-1:2015, the number and size of the combined cracks were evaluated. Regarding the number of cracks, it is evaluated in three grades of A, B, and C, and it is preferable to evaluate A which has less cracks. Further, the size of the crack is evaluated in five grades of 1 to 5, and it is preferable to evaluate the crack 1 which is small.

In the present invention, the size of the crack is a more important factor than the number of cracks, and it is preferable that the crack is small. For example, when the A-5 evaluation is compared with the B-4 evaluation, the number of cracks evaluated by the A-5 is smaller than that of the B-4 evaluation, but the crack is large. Here, in the A-5 evaluation in which the number of cracks is small and the crack is large, the tensile stress will concentrate on fewer cracks. Therefore, compared with the B-4 which has a large number of cracks but a short length, the A-5 evaluation is more likely to cause cracking.

Examples 1 to 2, Comparative Examples 1 and 2, and Reference Example 1 Each component of the type and the amount described in Table 1 was melt-kneaded at 230 ° C for 3 minutes using a Laboplastomill to prepare an elastomer resin composition. The obtained elastomer resin composition was subjected to hot press forming at 200 ° C for 4 minutes using a press machine to obtain a pressurizing plate of 30 mm × 30 mm × 1 mm in thickness. Furthermore, in Table 1, the blank column indicates that it is not allocated.

Examples 3 to 4 and Comparative Example 2 Each component of the type and the amount described in Table 2 was kneaded by a roll under the following conditions to prepare an elastomer resin composition. Furthermore, in Table 2, the blank column indicates that it is not allocated. Testing machine: Ikeda Machinery Industry Co., Ltd., 6-inch high-temperature roll size: 6" ×16" Front roller rotation number: 25 rpm Front and rear roller rotation ratio: 1 (front): 1.22 (rear) Roller temperature: 80±5°C Number of times of cutting: 3/4 cutting of rubber 3 times of rolling back and forth: 6 times

Example 5 Each component of the type and the amount described in Table 3 was kneaded by a roll under the following conditions to prepare an elastomer resin composition. Testing machine: manufactured by DAIHAN (share), 8 inch water-cooled roll "HF-2R" Roll size: 8" ×18" Front roller rotation number: 20 rpm Front and rear roller rotation ratio: 1 (front): 1.15 (rear) Roller temperature: 23 °C Number of times of cutting: 3 times each side Rolling width: Roll gap: about 0.8 mm Number of shots: 5 times

[Table 1]

[Table 2]

[table 3]

From the results of Tables 1 to 3, it was found that the elastomer resin composition of the present invention is excellent in ozone resistance. Further, from the results of Table 1, it was found that the elastomer resin composition of the present invention can control the bleeding of oil in the elastomer resin composition. It is considered that the surface of the resin composition is coated with the exuded additive by controlling the amount of bleeding within an appropriate range, thereby improving ozone resistance. Further, from the results of Table 2, it was found that the ozone resistance of Examples 3 and 4 using the polypropylene resin (B) was more excellent than Comparative Example 2 using the wax-based anti-aging agent (D7-1). [Industrial availability]

The elastomer resin composition of the present invention can be suitably used for tires; automotive exterior materials such as edge trims, wipers, and bumpers; instrument panels, center panels, center console boxes, door trims, pillars, auxiliary grips, Steering wheel, airbag cover and other automotive interior materials; rack and pinion sleeve, suspension sleeve, constant velocity joint sleeve and other automotive functional parts; remote control switch, office automation (OA, Office Automation) equipment, various key tops, TV, audio Household appliances such as vacuum cleaners; electrical appliances; covers for goggles, waterproof cameras, etc.; various gaskets; sealing materials, adhesives; rollers; packaging sheets and films for daily groceries, industrial materials, foods, etc.; Baby/infant products; wire covering materials, silencer gears; sports shoes, fashion sandals and other footwear; skin materials; belts, hoses, tubes; sporting goods; doors, window frames and other building materials; vibration absorption materials; Various ferrules; valve parts; medical gypsum, catheter, infusion bag, medical syringe gasket and other medical supplies.

Since the elastomer resin composition of the present invention is excellent in ozone resistance, deterioration of the molded body including the elastomer resin composition can be suppressed. Moreover, according to the present invention, in the molded body including the elastomer resin composition, the additive can be gradually exuded by appropriately controlling the bleeding rate of the additive, thereby exerting the effect of the additive on the surface of the molded article. In particular, in the case of using a tire as an additive, it is possible to suppress cracking of the tire caused by deoiling. Further, in the case of using a wax as an additive in tires, cable applications, and the like, the wax can be gradually ooze out from the tire by appropriately controlling the bleeding rate of the wax to coat the surface of the tire to prevent aging of the tire.

Claims (12)

An elastomer resin composition comprising: an elastomer resin (A); and a polypropylene resin (B) having a melting heat absorption (ΔH-D) obtained according to a melting endothermic curve of 0 J/g or more and 80 J /g or less, the melting endothermic curve is obtained by using a differential scanning calorimeter (DSC) to hold the sample under a nitrogen atmosphere at -10 ° C for 5 minutes, and then raising the temperature at 10 ° C / min; and an additive ( And the above-mentioned elastomer resin (A) is contained in an amount of 50% by mass or more and 99.5% by mass based on 100% by mass of the total amount of the elastomer resin (A) and the polypropylene resin (B). % or less and the above-mentioned polypropylene-based resin (B) are 0.5% by mass or more and 50% by mass or less, and fluidity is not exhibited at 230 °C. The elastomer resin composition of claim 1, wherein the polypropylene resin (B) satisfies the following (1), (1) no melting point (Tm-D) or melting point (Tm-D) of 0 ° C or more is observed. And below 120 ° C, the above melting point (Tm-D) is defined as by using a differential scanning calorimeter (DSC), the sample is kept at -10 ° C for 5 minutes under nitrogen atmosphere, at 10 ° C / min The peak top observed on the highest temperature side of the melting endothermic curve obtained by heating. The elastomer resin composition of claim 1 or 2, wherein the polypropylene resin (B) has an ultimate viscosity [η] of 0.01 dL/g or more and 2.50 dL/g or less. The elastomer resin composition according to any one of claims 1 to 3, wherein the polypropylene resin (B) contains more than 0 mol% and is 20 mol% or less selected from ethylene and carbon numbers 4 to 30. At least one structural unit of the group consisting of α-olefins. The elastomer resin composition according to any one of claims 1 to 4, wherein the above elastomer resin (A) comprises a source selected from the group consisting of styrene, a diene, a ruthenium-containing monomer, a fluorine-containing monomer, ethylene, and an isopenic At least one structural unit of the group consisting of diene. The elastomer resin composition of claim 5, wherein the diene is selected from the group consisting of butadiene, isoprene, β-farnesene, cyclopentadiene, dicyclopentadiene, 5-ethylene- At least one of the group consisting of 2-northene and 1,4-hexadiene. The elastomer resin composition according to any one of claims 1 to 5, wherein the above elastomer resin (A) comprises a structural unit derived from styrene. The elastomer resin composition according to any one of claims 1 to 5, wherein the elastomer resin (A) is a copolymer of styrene and a conjugated diene. The elastomer resin composition according to any one of claims 1 to 5, wherein the elastomer resin (A) is an ethylene-propylene-nonconjugated diene copolymer rubber. The elastomer resin composition according to any one of claims 1 to 5, wherein the elastomer resin (A) is a conjugated diene rubber. The elastomer resin composition according to any one of claims 1 to 10, wherein the above additive (D) contains an oil. A molded body comprising the elastomer resin composition according to any one of claims 1 to 11.