JP2001226527A - Oil-and weather-resistant rubber composition and oil-and weather-resistant rubber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an oil- and weather-resistant rubber composition excellent in processibility and an oil- and weather-resistant rubber excellent in resistances to oil and weather. SOLUTION: An NBR as an α,β-unsaturated nitrile/conjugated diene rubber and an epoxidized polyethylene resin as an olefin resin having crosslinking functional groups are kneaded together; thus, the NBR and the polyethylene resin are dispersed in each other, and simultaneously, epoxy groups of the polyethylene resin react, giving an oil- and weather-resistant rubber composition wherein the dispersion state of the NBR and the resin is fixed. The fixed dispersion state is maintained even when the composition is vulcanized, giving an oil- and weather-resistant rubber wherein a rubber having a relatively high polarity and a resin having a relatively low polarity are sufficiently and homogeneously dispersed in each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil and weather resistant rubber composition and an oil and weather resistant rubber. More specifically, the present invention relates to an oil- and weather-resistant rubber composition having excellent processability, and an oil- and weather-resistant rubber obtained by vulcanizing this rubber composition, having excellent oil resistance and weather resistance, and having a small compression set. The oil-resistant and weather-resistant rubber of the present invention can be suitably used for an oil-resistant hose such as a fuel transfer hose of an internal combustion engine, a sealing material used for an oil-resistant hose and a fuel pump, and an O-ring.

[0002]

2. Description of the Related Art Generally, an unsaturated nitrile / conjugated diene rubber having excellent oil resistance is mixed with a resin having excellent weather resistance.
Difficult to disperse. However, it is possible to easily disperse the resin by including a halogen in the resin and bringing the SP value closer to that of the unsaturated nitrile / conjugated diene rubber. For example, a rubber containing an unsaturated nitrile-conjugated diene rubber and polyvinyl chloride (Japanese Patent Publication No. 56-44100), a rubber containing an unsaturated nitrile-conjugated diene rubber and chlorinated polyethylene (Japanese Patent Publication No. 63-44) No. 60783) is a rubber having oil resistance and weather resistance. However, since halogen releases harmful gas with combustion, the use of halogen tends to be suppressed in recent years, and a rubber which does not contain halogen and has oil resistance and weather resistance is required.

[0003]

SUMMARY OF THE INVENTION The present invention provides a novel oil- and weather-resistant rubber composition containing an unsaturated nitrile / conjugated diene rubber, an olefin resin and / or a vinyl resin, and a rubber composition obtained from the composition. An object of the present invention is to provide an oil and weather resistant rubber.

[0004]

SUMMARY OF THE INVENTION The oil- and weather-resistant rubber composition of the present invention is obtained by crosslinking resin molecules in order to disperse an unsaturated nitrile / conjugated diene rubber and a resin having low polarity. There is a feature. Thereby, the unsaturated nitrile / conjugated diene rubber and the resin can be sufficiently dispersed.

The oil- and weather-resistant rubber composition of the present invention (hereinafter simply referred to as "rubber composition") comprises an α, β-unsaturated nitrile / conjugated diene rubber and an olefin resin having a crosslinkable functional group. And / or a vinyl resin having a crosslinkable functional group.

As the α, β-unsaturated nitrile monomer constituting the above-mentioned “α, β-unsaturated nitrile / conjugated diene rubber” (hereinafter also simply referred to as “nitrile diene rubber”), acrylonitrile is used. And methacrylonitrile. Examples of the conjugated diene monomer include 1,3-butadiene, isoprene, 2,3-dimethyl-1,3-butadiene, 1,3-pentadiene,
Examples include 3-hexadiene and cyclo-1,3-pentadiene.

Further, for example, ethyl acrylate, n-
Propyl acrylate, isopropyl acrylate, n
-Butyl acrylate, isobutyl acrylate, n-
It can also be copolymerized with acrylic acid esters such as pentyl acrylate and isopentyl acrylate (preferably, alkyl alcohol esters having 2 to 5 carbon atoms).

The content of α, β-unsaturated nitrile units contained in the nitrile diene rubber used in the present invention is 20 to 50% by mass (preferably 30 to 50% by mass).
It is preferred that If it is less than 20% by mass, the oil resistance becomes insufficient, and if it exceeds 50% by mass, the low-temperature properties become insufficient. Further, the content of the conjugated diene-based unit is from 20 to
It is preferably 80% by mass (more preferably 30 to 70% by mass). If it is less than 20% by mass, it is difficult to obtain sufficient rubber elasticity, and if it exceeds 80% by mass, the oil resistance becomes insufficient. Further, the content of units derived from other monomers is preferably 40% by mass or less (more preferably 30% by mass or less).

The olefin monomers constituting the above-mentioned “olefin resin” include ethylene, propylene and 1
-Butene and the like. The vinyl monomer constituting the above “vinyl resin” includes (meth)
Examples include acrylates such as acrylic acid, methyl (meth) acrylate, and ethyl (meth) acrylate. In the present invention, in addition to a normal vinyl monomer, a monomer having a functional group other than hydrogen bonded to the cis or trans position is also included as a vinyl monomer.

The “crosslinkable functional groups” of the olefin resin and the vinyl resin include the following: between the molecules of the olefin resin; between the molecules of the vinyl resin; between the molecules of the olefin resin and the vinyl resin; It is a functional group capable of forming a cross-linking bond in at least one of molecules between the resin and / or the vinyl resin and the nitrile diene rubber. Examples of such a crosslinkable functional group include an epoxy group, a carboxyl group, an acid anhydride group, an ester group, an amino group, an imino group, an amide group, and a hydroxyl group as in the fourth invention. These crosslinkable functional groups are the same as the functional groups in the nitrile diene rubber. That is, the acid anhydride group is a group having a -OC-O-CO- bond.
The ester group is preferably a methoxycarbonyl group or an ethoxycarbonyl group derived from a carboxylic acid. Among these crosslinkable functional groups, it is particularly preferable to be at least one of an epoxy group, a carboxyl group, an acid anhydride group, an ester group, an amino group, and a hydroxyl group.

The cross-links formed by these cross-linkable functional groups are formed by condensation, and also cross-links that do not involve condensation, such as by epoxy groups and amino groups.
According to the above-mentioned crosslinkable functional group, for example, an epoxy group can form a crosslink between epoxy groups. The carboxyl groups can form cross-links between the carboxyl groups by condensation. In particular, it is considered that carboxyl groups form a metal cross-linking bond in the presence of ZnO or the like. Further, the carboxyl group and each of the methoxycarbonyl group and the ethoxycarbonyl group can form a cross-linking by condensation.

An amino group can form a crosslink with a carboxyl group and an epoxy group by condensation. In addition, amide groups can form crosslinks with hydroxyl groups. Two or more of these groups may be contained in each of one kind of olefin-based resin and one kind of vinyl-based resin. Further, the olefin-based resin and the vinyl-based resin are each two or more olefin-based resins,
Two or more vinyl resins may be used. In addition, other rubbers and resins such as ethylene / α-olefin-based rubber and acrylic rubber may be contained within a range that does not significantly reduce oil resistance and weather resistance.

These crosslinkable functional groups can be introduced into an olefin resin or a vinyl resin, or a monomer having a crosslinkable functional group can be copolymerized during production of the olefin resin or the vinyl resin. Can also be obtained. Examples of such a monomer having a crosslinkable functional group include (meth) allyl glycidyl ether, glycidyl (meth) acrylate, and 3,4, into which an epoxy group can be introduced.
-Oxycyclohexyl (meth) acrylate and the like. Examples of the monomer into which a carboxyl group can be introduced include unsaturated carboxylic acids such as (meth) acrylic acid, maleic acid, fumaric acid, and itaconic acid.

As monomers capable of introducing an acid anhydride group,
And unsaturated carboxylic anhydrides such as maleic anhydride, fumaric anhydride and itaconic anhydride. Examples of monomers into which an ester group can be introduced include alkyl (meth) acrylates, alkoxyalkyl (meth) acrylates, and (meth) alkoxypolyalkylene glycols.
Acrylic esters and the like can be mentioned. Examples of monomers into which an amino group can be introduced include dialkylaminoalkyl (meth) acrylates, N-dialkylaminoalkyl group-containing unsaturated amides, and tertiary amino group-containing vinyl aromatic compounds.

As a monomer into which an imino group can be introduced, N
-Methylacrylamide, N-ethylacrylamide,
Acrylic acetamide and the like can be mentioned. Acrylamide, N
-Methylacrylamide, N-ethylacrylamide,
Acrylic acetamide and the like can be mentioned. Examples of monomers into which a hydroxyl group can be introduced include hydroxyalkyl (meth) acrylates, polyalkylene glycols, and hydroxyl group-containing vinyl aromatic compounds. Two or more of these various monomers having functional groups may be used in combination. These monomers can also be used in the copolymerization of nitrile diene rubber.

The functional group of the nitrile diene rubber and / or the cross-linkable functional group of the olefin resin and vinyl resin form a cross-linking to form the nitrile diene rubber as in the second invention. An olefin resin having a crosslinkable functional group and / or a vinyl resin having a crosslinkable functional group can be used as the continuous phase. In order to form the continuous phase and the dispersed phase, it is necessary that a crosslinkable bond is formed by a crosslinkable functional group provided in the olefin resin and / or the vinyl resin. This cross-linking is preferably the cross-linking of (1) or (2) as in the third invention. By having these crosslinks, the olefin resin and / or the vinyl resin can maintain a good dispersion state in the continuous phase of the nitrile diene rubber. The dispersed phase represents a state in which the particles are dispersed so that the particle size is 5 μm or less (more preferably 3 μm or less, and still more preferably 1 μm or less).

In the oil- and weather-resistant rubber composition of the first invention, crosslinking by a crosslinking functional group is not necessarily required, but crosslinking is required in the process of obtaining a vulcanized rubber from this composition. That is, the crosslinks are formed at least before or during vulcanization. As a result, the nitrile diene rubber and the nitrile diene rubber and the olefin resin and / or the vinyl resin are vulcanized without agglomeration during the vulcanization heating. That is, during or before vulcanization,
It is preferable to obtain an oil- and weather-resistant rubber composition having a crosslinking bond of either (1) or (2) as in the invention.

The formation of such a cross-link is caused by the formation of peroxides such as ketopoperoxides, diacyl peroxides, hydroperoxides, dialkyl peroxides, peroxyketals, peroxyesters and peroxycarbonates. It can be performed by adding a substance. In particular, when the crosslinkable functional group is an epoxy group, it can be formed by adding an acid, a phosphonium salt, an ammonium salt, triphenylphosphine, octadecyltrimethylammonium bromide, or the like. Furthermore, in the case of this epoxy group, it is 120 to 250 at the time of kneading during kneading.
By maintaining the temperature at ° C, a cross-linking bond can be formed.

Further, the nitrile diene rubber, the olefin resin and the vinyl resin are, when the total of the nitrile diene rubber, the olefin resin and the vinyl resin is 100% by mass as in the fifth invention, The nitrile diene rubber is 40 to 85% by mass (more preferably 60 to 80% by mass), and the total of the olefin resin and the vinyl resin is 15 to 60% by mass (more preferably 25 to 45% by mass). Is preferred. Nitrile diene rubber is 4
If the amount is less than 0% by mass (that is, the sum of the olefin resin and the vinyl resin exceeds 60% by mass), it is difficult to sufficiently obtain rubber elasticity, and the rubber elasticity exceeds 85% by mass (ie, the olefin resin and the vinyl resin). Is less than 15% by mass), it is difficult to obtain sufficient weather resistance.

The oil- and weather-resistant rubber of the sixth invention is characterized by containing the vulcanized oil-and-weather-resistant rubber composition according to any one of the first to fifth inventions. The dispersion of the nitrile diene rubber and the olefin resin and / or vinyl resin dispersed in the oil- and weather-resistant rubber composition is maintained even in the oil- and weather-resistant rubber of the present invention.

The nitrile diene rubber used in the oil- and weather-resistant rubber compositions of the first to fifth aspects of the present invention includes the above-mentioned monomer capable of introducing a crosslinkable functional group according to the first aspect of the present invention. It is obtained by polymerization by emulsion polymerization or suspension polymerization using a radical polymerization initiator. As the radical polymerization initiator, one or more of an organic peroxide, a diazo compound, an inorganic peroxide, a redox catalyst and the like can be used. Further, as the emulsifier used for the emulsion polymerization, one or more of an anionic surfactant, a nonionic surfactant, a cationic surfactant, an amphoteric surfactant and the like can be used. As the suspension stabilizer used in the suspension polymerization, one or more of polyvinyl alcohol, sodium polyacrylate, hydroxyethyl cellulose and the like can be used.
The polymerization system may be either a continuous system or a batch system.

The olefin-based resin and vinyl-based resin used in the oil- and weather-resistant rubber compositions of the first to fifth aspects of the present invention are the following.
It can be obtained by copolymerization using a monomer capable of introducing a crosslinkable functional group according to the invention. Furthermore, the first
The oil- and weather-resistant rubber composition according to the fifth to fifth aspects is, for example, kneading the above-mentioned nitrile diene rubber and an olefin resin and / or a vinyl resin using a kneading machine.
An aqueous dispersion or emulsion of a nitrile diene rubber and / or a nitrile diene rubber, and an olefin resin and / or
Alternatively, it can be obtained by mixing with an aqueous dispersion or emulsion of a vinyl resin, coagulating and drying, and kneading with a kneading machine. The nitrile diene rubber used may be any of solid, liquid and latex. Further, during kneading, heating may be performed to crosslink the crosslinkable functional group. The kneader to be used is not particularly limited, and can be used according to the purpose, such as a closed kneader such as a Banbury mixer, an internal mixer, or a kneader, or an open roll.

The oil- and weather-resistant rubber composition of the present invention may optionally contain a crosslinking agent (including a catalyst), a vulcanizing agent (including a catalyst), a vulcanization accelerator, a filler, a reinforcing agent, a lubricant, a softening agent. Agents, plasticizers, antioxidants, antioxidants, processing aids, scorch inhibitors, ultraviolet absorbers, tackifiers, waxes, light stabilizers, internal mold release agents, foaming agents, foaming aids, colorants, Antibacterial agent,
Flame retardants, mastication accelerators and the like can be added.

As the crosslinking agent, an organic peroxide or the like can be used. Vulcanizing agents include sulfur vulcanizing agents, organic peroxides, quinoid vulcanizing agents, metal oxide vulcanizing agents, sulfur-containing organic compounds, amine vulcanizing agents, triazine vulcanizing agents, polyols One or more kinds of vulcanizing agents, metal soap vulcanizing agents, maleimide vulcanizing agents and the like can be used. Examples of the vulcanization accelerator include aldehyde ammonias,
Aldehyde amines, guanidine salts, imidazolines, thiazoles, sulfenamides, thioureas,
Dithiocarbamates, thiurams, xanthates,
One or more types such as thioglycolic acid esters can be used.

As the reinforcing agent, carbon black and / or
Alternatively, silica or the like can be used. As the filler, inorganic compounds such as calcium carbonate, clay, talc,
One or more of balun, fibers, rubbers, wood flour and the like can be used.

The oil and weather resistant rubber of the sixth invention can be obtained by vulcanizing the above oil and weather resistant rubber composition. This vulcanization needs to be performed simultaneously with or after the crosslinking formed in the crosslinking functional groups present in the oil- and weather-resistant rubber composition. This is because when the crosslinkable functional group in the oil-resistant weather-resistant rubber composition is crosslinked, the state in which the nitrilediene rubber, the olefin resin, and the vinyl resin are dispersed by kneading can be maintained.
The method for molding the oil- and weather-resistant rubber of the present invention is not limited. Known methods such as press molding, transfer molding, extrusion molding, and injection molding can be employed.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail by way of examples. However, it is not limited to these. (1) Preparation of Oil- and Weather-Resistant Rubber Composition and Production of Oil- and Weather-Resistant Rubber The raw materials shown in “First-stage kneading” in Tables 1 and 2 are shown in Table 1.
And the mixture at the ratio shown in Table 2 and a set temperature of 150 with a 10 liter pressure type kneader (manufactured by Moriyama Seisakusho)
C., kneading time was 10 minutes, and rotation kneading was performed 60 times / minute. Thereafter, the raw materials shown in “Second-stage kneading” were further added and kneaded similarly. Further, after that, the raw materials shown in “Kneading in the third stage” were added and kneaded in the same manner, and Examples 1 to 12 of the present invention and Comparative Examples 1 to 8 of comparative products were added.
I got In Experimental Examples 2, 7, and 10, an increase in torque was observed during the kneading in the first stage. This is considered to be because the glycidyl groups contained in the olefin-based resin are crosslinked.

[0028]

[Table 1]

[0029]

[Table 2]

The raw materials shown in Tables 1 and 2 are as follows. Nitrile diene rubber NBR1; acrylonitrile butadiene rubber, [JSR
NBR2; acrylonitrile butadiene rubber, (JSR N230SH), butadiene content 65%, acrylonitrile content 35%, Mooney viscosity 85ML1 + 4 (100 ° C)
NBR3: acrylonitrile-butadiene rubber, [JSR N280], product name “JSR N280”, butadiene content 68%, acrylonitrile content 32%, liquid)
Co., Ltd., product name “JSR N250S”, butadiene content 80%, acrylonitrile content 20%, Mooney viscosity 63ML1 + 4, (100 ° C.)]

Nitrile diene rubber NBR4: acrylonitrile butadiene rubber containing glycidyl group, [butadiene content 60%, acrylonitrile content 35%, glycidyl methacrylate content 5%,
Mooney viscosity 80ML1 + 4, (100 ° C)] NBR5; Carboxyl group-containing acrylonitrile butadiene rubber, [butadiene content 60%, acrylonitrile content 35%, methacrylic acid content 5%, Mooney viscosity 82ML1 + 4, (100 ° C)] NBR6; hydroxyl Group-containing acrylonitrile butadiene rubber, [butadiene content 60%, acrylonitrile content 35%, 2-hydroxyethyl methacrylate content 5%, Mooney viscosity 84ML1 + 4, (100
℃)]

Resin DP1 having a crosslinkable functional group; ethylene-acrylic acid copolymer (manufactured by Mitsubishi Chemical Corporation, product name “A210K”, acrylic acid content: 7% by mass) DP2: ethylene-glycidyl methacrylate-vinyl acetate Polymer, (manufactured by Sumitomo Chemical Co., Ltd., product name "Bond First 2B", glycidyl methacrylate content 12% by mass, vinyl acetate content 5% by mass) DP3; ethylene / ethyl acrylate / maleic anhydride terpolymer, ( Sumitomo Chemical Co., Ltd., product name "Bondane LX4110", ethyl acrylate content 6% by mass, maleic anhydride content 3% by mass) DP4; maleic anhydride-modified polypropylene, (Sumitomo Chemical Co., product name "Smith Farm", anhydrous) Maleic acid content: 3% by mass) DP5; modified with methacrylic acid Methacrylic acid methyl copolymer,
(Mitsubishi Rayon Co., Ltd., product name "Dianal BR-
77 ") DP6; ethylene-methyl methacrylate copolymer, manufactured by Sumitomo Chemical Co., Ltd., product name" Aclift WD203-
1 ", content of methyl methacrylate 5% by mass) DP7; polymethyl methacrylate (product name" IRD30 "manufactured by Mitsubishi Rayon Co., Ltd.)

Resin P1 having no crosslinkable functional group; polyethylene wax, (manufactured by Sanyo Chemical Co., Ltd.
Product name "Sunwax 161-P", average molecular weight 500
0) P2; low-density polyethylene, (manufactured by Mitsubishi Chemical Corporation, product name "YF30") P3; random copolymer polypropylene, (Japan Polyrefin, product name "MD772H") P4; polyvinyl chloride, (manufactured by Taiyo PVC Co., Ltd.) Product name "PVC3000H")

Other EPDM; Ethylene propylene rubber, (manufactured by JSR Corporation, product name "EP65") CB; Carbon black, (manufactured by Tokai Carbon Co., Ltd.
BX; plasticizer, manufactured by Daihachi Chemical Co., Ltd., product name "BXA"
R ") StA; stearic acid; (Kao Corporation) ZnO; vulcanization accelerator (manufactured by Sakai Chemical Co., Ltd., product name" Zn "
O # 1 ")

D40: peroxide, (Nippon Yushi Co., Ltd., product name "Park Mill D40") S: sulfur, (Tsurumi Chemical Co., Ltd.) TT; vulcanization accelerator, (Ouchi Shinko Co., product name "Ac"
cTT ") TET; vulcanization accelerator, (Ouchi Shinko Co., Ltd., product name" A
ccTET ") CZ; vulcanization accelerator, (Ouchi Shinko Co., Ltd., product name" Ac
cCZ ")

(2) Evaluation of physical properties of oil and weather resistant rubber composition The minimum Mooney viscosity and Mooney scorch time of the obtained oil and weather resistant rubber composition were measured in accordance with JIS K 6300. The results are shown in Tables 3 and 4. (3) Evaluation of vulcanization properties of the oil- and weather-resistant rubber composition Thereafter, a change in torque due to vulcanization of the obtained composition was evaluated using a curast meter (manufactured by JSR Corporation, type “Culast V type”). The evaluation measured the minimum torque and the maximum torque at 170 degreeC. The results are shown in Tables 3 and 4.

(4) Production of Oil and Weather Resistant Rubber The oil and weather resistant rubber composition obtained in (1) was formed into a sheet having a thickness of 2 mm (by Toshiba Machine Co., Ltd., model “IS-90B”). . At the time of molding, the rubber is vulcanized by heating to a temperature of 170 ° C. to form an oil-resistant weather-resistant rubber.

(5) Evaluation of Physical Properties of Oil- and Weather-Resistant Rubber The obtained sheet-like oil- and weather-resistant rubber was measured for tensile strength at break, elongation at break, JIS-A hardness, compression set and ozone deterioration. In addition, each physical property value was measured by the following method. JIS-A hardness; a method according to JIS K6301. Tensile strength at break; a method according to JIS K6301. Elongation at break; a method according to JIS K6301. Compression set: Method according to JIS K 6301 (1
00 ° C, 22 hours). Oil resistance; a method according to JIS K 6258 (immersion in a mixed solvent of isooctane and toluene (isooctane 5 / toluene 5) at 40 ° C. for 2 hours). Ozone degradation; method according to JIS K 6259 (50
pphm, 40 ° C, 20% elongation, 200 hours). The obtained results are also shown in Tables 3 and 4.

[0039]

[Table 3]

[0040]

[Table 4]

From the results in Tables 3 and 4, Examples 1 to 12 were obtained.
Is the Mooney viscosity of 30 or less, it can be seen that workability good rubber composition within Mooney scorch time t ₅ is 4.6 minutes is obtained in. The rubber obtained from this rubber composition has a breaking tensile strength of 11.6 to 1
It is found that the rubber composition has excellent rubber properties of 4.6 dN · m, elongation at break of 260 to 350%, and compression set of 17 to 50. Furthermore, the oil resistance of this rubber is 40 to 60% in volume expansion coefficient, and it can be seen that the rubber obtained from NBR and polyvinyl chloride of Comparative Example 8 has the same oil resistance. Excellent weather resistance (no ozone deterioration resistance) without cracks in ozone deterioration test
It can be seen that there is provided. On the other hand, according to the results in Table 4, in Comparative Examples 1, 3, 4, 5, 6, and 7, cracks were generated or cut, indicating that the samples did not have sufficient weather resistance. In Comparative Example 2, although the weather resistance was excellent, the oil resistance was significantly poor. In the rubbers of Experimental Examples 1 to 12, rubbers having excellent oil resistance and weather resistance comparable to the oil and weather resistant rubber obtained from NBR and polyvinyl chloride of Comparative Example 8 can be obtained.

[0042]

According to the first aspect of the present invention, a rubber excellent in oil resistance and weather resistance can be obtained, and an oil-resistant weather-resistant rubber composition excellent in processability can be obtained. According to the sixth aspect, a rubber particularly excellent in oil resistance and weather resistance can be obtained.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Hidetoshi Goto 2-11-24 Tsukiji, Chuo-ku, Tokyo FSR term in JSR Corporation (reference) 4J002 AA03X AC07W BB10X BB14X BB20X BG07X DA036 DE236 DJ016 DJ036 DJ046 EK006 EN096 EU116 EV166 EV266 EV276 EV326 FD016 FD146 FD156

Claims (6)

[Claims] 1. An α, β-unsaturated nitrile / conjugated diene rubber, an olefin resin having a crosslinkable functional group and / or
Or a vinyl-based resin having a crosslinkable functional group, and an oil- and weather-resistant rubber composition. 2. The α, β-unsaturated nitrile / conjugated diene rubber is a continuous phase, and the olefin resin having a crosslinkable functional group and / or the vinyl resin having a crosslinkable functional group is a dispersed phase. The oil- and weather-resistant rubber composition according to claim 1. 3. The oil- and weather-resistant rubber composition according to claim 1, which has a crosslinking bond of the following (1) and / or (2). (1) a cross-link formed between at least one of the molecules of the olefin-based resin, between the molecules of the vinyl-based resin, and between the molecules of the olefin-based resin and the vinyl-based resin; Cross-linking formed between the resin and / or the vinyl resin and the α, β-unsaturated nitrile / conjugated diene rubber 4. The crosslinkable functional group is at least one of an epoxy group, a carboxyl group, an acid anhydride group, an ester group, an amino group, an imino group, an amide group and a hydroxyl group. The oil- and weather-resistant rubber composition according to any one of the above. 5. When the total of the α, β-unsaturated nitrile / conjugated diene rubber, the olefin resin and the vinyl resin is 100% by mass, the α, β-unsaturated nitrile / conjugate The diene rubber is 40 to 85% by mass, and the olefin resin and the vinyl resin are 15 to 6 in total.
The oil- and weather-resistant rubber composition according to any one of claims 1 to 4, which contains 0% by mass. 6. An oil- and weather-resistant rubber comprising a vulcanized rubber obtained by vulcanizing the oil- and weather-resistant rubber composition according to any one of claims 1 to 5.