WO2018212180A1 - 直接加硫接着用ゴム組成物、及び金属-ゴム複合成形体 - Google Patents
直接加硫接着用ゴム組成物、及び金属-ゴム複合成形体 Download PDFInfo
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- C08K3/00—Use of inorganic substances as compounding ingredients
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- C08K3/011—Crosslinking or vulcanising agents, e.g. accelerators
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Definitions
- the present invention relates to a rubber composition for direct vulcanization adhesion and a metal-rubber composite molded article.
- Ethylene- ⁇ -olefin copolymer rubber represented by ethylene- ⁇ -olefin copolymer rubber and ethylene- ⁇ -olefin-non-conjugated polyene copolymer rubber has weather resistance, heat resistance, chemical resistance, etc. It is excellent in various functions and is widely used in applications such as automobile parts, electrical / electronic parts, and OA equipment parts.
- ethylene- ⁇ -olefin copolymer rubber has a low degree of unsaturation and does not have a polar group or a functional group in the molecular structure, so that it itself has poor adhesion to metal. Therefore, conventionally, when bonding a rubber molded body and a metal member, in order to increase the adhesive strength, a method of applying an adhesive in advance to the metal member and vulcanizing and molding the unvulcanized rubber on the adhesive, By vulcanizing and molding the unvulcanized rubber containing sulfur on the surface of the brass-plated metal member, the unvulcanized rubber is vulcanized and at the same time copper sulfide is formed on the surface of the metal member. For example, a method of bonding a rubber molded body and a metal member (for example, Non-Patent Document 1) is employed. As another technique for increasing the adhesive strength, a method using carbon black treated with silicon as in Patent Document 1 has also been proposed.
- zinc acrylate provides high adhesive strength in the case of rubber compositions that are crosslinked with peroxides, but for rubber compositions that are crosslinked by sulfur vulcanization, zinc acrylate improves adhesion strength. There is a problem that it is not always effective.
- one aspect of the present invention is to form a rubber molded body that is directly vulcanized and bonded to a metal member using a rubber composition that is crosslinked by sulfur vulcanization.
- the purpose is to increase.
- One aspect of the present invention is: (A) an ethylene- ⁇ -olefin copolymer rubber having an ethylene unit and an ⁇ -olefin unit having 3 or more carbon atoms; (B) a silane coupling agent containing a sulfur atom; (C) a vulcanizing agent containing sulfur; A rubber composition containing In this rubber composition, the content of the silane coupling agent containing a sulfur atom is 2.7 to 12 parts by mass with respect to 100 parts by mass of the ethylene- ⁇ -olefin copolymer rubber.
- This rubber composition is a rubber composition for direct vulcanization and adhesion that is used to form a rubber molded article that is directly vulcanized and adhered to a metal member.
- an aspect of the present invention provides a metal-rubber composite molded body comprising a metal member of the rubber composition, and a rubber molded body that is directly bonded to the metal member and includes a vulcanized product of the rubber composition.
- the rubber composition according to the present invention is a rubber composition that is crosslinked by sulfur vulcanization, and when a rubber molded body that is directly vulcanized and bonded to a metal member is formed, the metal member and the rubber molded body are highly bonded. Strength can be developed.
- Another aspect of the present invention provides a metal-rubber composite molded body comprising a metal member and a rubber molded body that is directly bonded to the metal member and includes a vulcanized product of the rubber composition.
- the metal-rubber composite molded body is formed by forming the rubber composition in contact with a metal member, thereby forming a rubber molded body directly bonded to the metal member, and vulcanizing the rubber composition. It can obtain by the manufacturing method containing these.
- the rubber molded body is bonded to the metal member with high adhesive strength.
- the adhesive strength between the metal member and the rubber molded body is increased. Can be increased.
- FIG. 1 is a cross-sectional view showing an embodiment of a metal-rubber composite molded body.
- the rubber composition comprises an ethylene- ⁇ -olefin copolymer rubber as component (A), a silane coupling agent containing a sulfur atom as component (B), and component (C). And a vulcanizing agent containing sulfur.
- the ethylene- ⁇ -olefin copolymer rubber of component (A) comprises an ethylene unit and an ⁇ -olefin unit having 3 or more carbon atoms. Contains as the main monomer unit.
- the ⁇ -olefin unit may have 3 to 20 carbon atoms.
- the total content of ethylene units and ⁇ -olefin units in the ethylene- ⁇ -olefin copolymer rubber is 60% by mass or more and 100% by mass with respect to the total mass of the ethylene- ⁇ -olefin copolymer rubber. 80 mass% or more and 100 mass% or less may be sufficient.
- the term “monomer name + unit” such as “ethylene unit”, “ ⁇ -olefin unit”, “non-conjugated polyene unit” means “monomer unit derived from the monomer”.
- ⁇ -olefin constituting the ethylene- ⁇ -olefin copolymer rubber examples include propylene, 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene, and 1 A linear olefin such as decene; a branched olefin such as 3-methyl-1-butene, 3-methyl-1-pentene, and 4-methyl-1-pentene; and a cyclic olefin such as vinylcyclohexane. These may be used alone or in combination of two or more to form an ethylene- ⁇ -olefin copolymer rubber.
- the ⁇ -olefin contained as a monomer unit in the ethylene- ⁇ -olefin copolymer rubber may be at least one of propylene and 1-butene, or may be propylene.
- the mass ratio of ethylene unit / ⁇ -olefin unit in the ethylene- ⁇ -olefin copolymer rubber is not particularly limited, but when the total of both is 100, 90/10 to 30/70, or 85 / It may be 15 to 45/55.
- the ethylene- ⁇ -olefin copolymer rubber may be an ethylene- ⁇ -olefin-nonconjugated polyene copolymer rubber further containing a nonconjugated polyene unit.
- the content of the non-conjugated polyene unit in the ethylene- ⁇ -olefin copolymer rubber may be 0 or more and 40 or less in terms of iodine value (unit: g / 100 g ethylene- ⁇ -olefin copolymer rubber). Good.
- the content of the non-conjugated polyene unit is 40 or less in terms of iodine value, the weather resistance of the rubber molded body can be further improved.
- the content of the non-conjugated polyene unit may be 0 or more and 35 or less, or 0 or more and 30 or less in terms of iodine value.
- the non-conjugated polyene constituting the ethylene- ⁇ -olefin copolymer rubber may have 3 to 20 carbon atoms.
- Specific examples of non-conjugated polyenes include Chain non-conjugated dienes such as 1,4-hexadiene, 1,6-octadiene, 2-methyl-1,5-hexadiene, 6-methyl-1,5-heptadiene, and 7-methyl-1,6-octadiene; Cyclohexadiene, dicyclopentadiene, 5-vinylnorbornene, 5-ethylidene-2-norbornene, 5- (2-propenyl) -2-norbornene, 5- (3-butenyl) -2-norbornene, 5- (4-pentenyl) ) -2-norbornene, 5- (5-hexenyl) -2-norbornene, 5- (6-heptenyl) -2-norbornene, 5- (7
- ethylene- ⁇ -olefin copolymer rubber may contain a monomer unit of 5-ethylidene-2-norbornene, dicyclopentadiene, 5-vinylnorbornene, or a combination thereof.
- the total content of ethylene units, ⁇ -olefin units and non-conjugated polyene units in the ethylene- ⁇ -olefin copolymer rubber is 60 masses relative to the total mass of the ethylene- ⁇ -olefin copolymer rubber. % Or more and 100% by mass or less, or 80% by mass or more and 100% by mass or less.
- ethylene- ⁇ -olefin copolymer rubber examples include ethylene-propylene-5-ethylidene-2-norbornene copolymer rubber, ethylene-propylene-dicyclopentadiene copolymer rubber, ethylene-propylene-1,4 -Hexadiene copolymer rubber, ethylene-propylene-1,6-octadiene copolymer rubber, ethylene-propylene-2-methyl-1,5-hexadiene copolymer rubber, ethylene-propylene-6-methyl-1,5 -Heptadiene copolymer rubber, ethylene-propylene-7-methyl-1,6-octadiene copolymer rubber, ethylene-propylene-cyclohexadiene copolymer rubber, ethylene-propylene-5-vinylnorbornene copolymer rubber, ethylene -Propylene-5- (2-propenyl) -2-norbol Copolymer rubber
- the rubber composition includes ethylene-propylene-5-ethylidene-2-norbornene copolymer rubber, ethylene-propylene-dicyclopentadiene copolymer rubber, and ethylene-propylene-5 as ethylene- ⁇ -olefin copolymer rubber.
- -A vinyl norbornene copolymer rubber or a combination thereof may be included, or an ethylene-propylene-5-ethylidene-2-norbornene copolymer rubber may be included.
- the mass ratio of the above-mentioned ethylene units / ⁇ -olefin units and the iodine value are the two or more kinds of ethylene- ⁇ -olefins. It is a value in the whole including the system copolymer rubber.
- the Mooney viscosity (ML1 + 4, 100 ° C.) at 100 ° C. of the ethylene- ⁇ -olefin copolymer rubber may be 10 to 350, or 30 to 300. If the Mooney viscosity is too low, the mechanical strength of the rubber molded product may be reduced, and if the Mooney viscosity is too high, kneadability tends to be reduced.
- the molecular weight distribution (Mw / Mn) of the ethylene- ⁇ -olefin copolymer rubber may be 1.5 or more and 10 or less. When the molecular weight distribution is 1.5 or more, good roll processability of the rubber composition is easily obtained. When the molecular weight distribution is 10 or less, the mechanical properties of the molded product tend to be improved. From the same viewpoint, the molecular weight distribution of the ethylene- ⁇ -olefin copolymer rubber may be 2.0 or more and 7.0 or less. The molecular weight distribution can be adjusted by changing the polymerization conditions.
- the molecular weight distribution in this specification is the ratio (Mw / Mn) calculated from the weight average molecular weight (Mw) and number average molecular weight (Mn) in terms of standard polystyrene measured using gel permeation chromatography (GPC method). is there.
- the measurement conditions of the weight average molecular weight and the number average molecular weight by the GPC method are, for example, as follows.
- the content of the ethylene- ⁇ -olefin copolymer rubber in the rubber composition may be 20% by mass or more, or 35% by mass or more based on the mass of the rubber composition.
- the content of the component (A) ethylene- ⁇ -olefin copolymer rubber is 75% by mass when the total mass of the component (A), component (B), and component (C) is 100% by mass. It may be more than or 85% by mass.
- the method for producing the ethylene- ⁇ -olefin copolymer rubber is not particularly limited.
- a catalyst such as a so-called Ziegler-Natta catalyst or a metallocene catalyst
- ethylene, ⁇ -olefin, and as necessary Accordingly, an ethylene- ⁇ -olefin copolymer rubber can be produced by a method including a step of copolymerizing a monomer mixture containing a non-conjugated polyene.
- a catalyst formed from a vanadium compound represented by the following formula (1) and an organoaluminum compound represented by the following formula (2) may be used.
- VO (OR) m X 3-m (1) [Wherein, R represents a linear hydrocarbon group having 1 to 8 carbon atoms, X represents a halogen atom, and m represents a number satisfying 0 ⁇ m ⁇ 3. ]
- R " j AlX" 3-j (2) (2)
- R ′′ represents a hydrocarbon group, X ′′ represents a halogen atom, and j represents a number satisfying 0 ⁇ j ⁇ 3. ]
- R in the formula (1) examples include a methyl group, an ethyl group, an n-propyl group, an n-butyl group, an n-pentyl group, and an n-hexyl group.
- R may be a linear alkyl group having 1 to 3 carbon atoms.
- Examples of X include a fluorine atom and a chlorine atom.
- m may be a number satisfying 1 ⁇ m ⁇ 2.
- vanadium compound represented by the formula (1) examples include VO (OCH 3 ) Cl 2 , VO (OC 2 H 5 ) Cl 2 , VO (O (n—C 3 H 7 )) Cl 2 , VO. (O (n—C 4 H 9 )) Cl 2 , VO (O (n—C 5 H 11 )) Cl 2 , VO (O (n—C 6 H 13 )) Cl 2 , VO (O (n— C 7 H 15)) Cl 2 , VO (O (n-C 8 H 17)) Cl 2, VO (OCH 3) 0.5 Cl 2.5, VO (OC 2 H 5) 0.5 Cl 2.
- vanadium compounds are VO (OC 2 H 5 ) Cl 2 , VO (OC 2 H 5 ) 0.5 Cl 2.5 , VO (OC 2 H 5 ) 1.5 Cl 1.5 , VO (OC 2 H 5) 0.8 Cl 2.2, or VO (OC 2 H 5) may be 1.8 Cl 1.2. These may be used alone or in combination.
- the vanadium compound represented by the formula (1) is obtained, for example, by a method in which VOX 3 and ROH are reacted at a predetermined molar ratio.
- the reaction between VOCl 3 and C 2 H 5 OH is represented by the following formula.
- VOX 3 and ROH may be supplied to the polymerization tank to produce the vanadium compound of formula (1) in the polymerization tank.
- R ′′ in formula (2) may be an alkyl group having 1 to 10 carbon atoms. Specific examples thereof include a methyl group, an ethyl group, an n-propyl group, an iso-propyl group, an n-butyl group, Examples thereof include an iso-butyl group, a pentyl group, and a hexyl group. Examples of X ′′ include a fluorine atom and a chlorine atom. j may be a number satisfying 0 ⁇ j ⁇ 2.
- the organoaluminum compound represented by the formula (2) include (C 2 H 5 ) 2 AlCl, (nC 4 H 9 ) 2 AlCl, (iso-C 4 H 9 ) 2 AlCl, (n— C 6 H 13 ) 2 AlCl, (C 2 H 5 ) 1.5 AlCl 1.5 , (n-C 4 H 9 ) 1.5 AlCl 1.5 , (iso-C 4 H 9 ) 1.5 AlCl 1.5 , (n-C 6 H 13 ) 1.5 AlCl 1.5 , C 2 H 5 AlCl 2 , (n-C 4 H 9 ) AlCl 2 , (iso-C 4 H 9 ) AlCl 2 , and (NC 6 H 13 ) AlCl 2 may be mentioned.
- the organoaluminum compound may be (C 2 H 5 ) 2 AlCl, (C 2 H 5 ) 1.5 AlCl 1.5 , or C 2 H 5 AlCl 2 . These may be used alone or in combination.
- the molar ratio of the amount used of the organoaluminum compound of formula (2) and the vanadium compound of formula (1) is 0.1 to 50, 1 to 30 and 2 It may be 15 or less, or 3 or more and 10 or less.
- the viscosity of the ethylene- ⁇ -olefin copolymer rubber, Mw / Mn, and the like can be adjusted. For example, when the molar ratio is large, the viscosity of the ethylene- ⁇ -olefin copolymer rubber tends to increase, and Mw / Mn tends to decrease.
- the polymerization reaction can be performed by, for example, a method of performing polymerization using one polymerization tank or a method of using two polymerization tanks connected in series.
- a monomer, a catalyst, and other components as necessary may be supplied to the polymerization tank to polymerize the monomer in the polymerization tank.
- the polymerization reaction is usually performed in a solvent.
- the solvent used for polymerization include aliphatic hydrocarbons such as propane, butane, isobutane, pentane, hexane, heptane, and octane; and inert solvents such as alicyclic hydrocarbons such as cyclopentane and cyclohexane. These may be used alone or in combination.
- the solvent may be an aliphatic hydrocarbon.
- the polymerization temperature may be usually 0 ° C. or higher and 200 ° C. or lower, 20 ° C. or higher and 150 ° C. or lower, or 30 ° C. or higher and 120 ° C. or lower.
- the polymerization pressure may be usually from 0.1 MPa to 10 MPa, from 0.1 MPa to 5 MPa, or from 0.1 MPa to 3 MPa.
- hydrogen may be supplied to the polymerization tank as a molecular weight regulator as necessary.
- the amount of hydrogen supplied to the polymerization tank may be 0.001 to 0.1 NL, 0.005 to 0.05 NL, or 0.01 to 0.04 NL per kg of the solvent supplied to the polymerization tank. .
- the Mw / Mn, viscosity, etc. of the ethylene- ⁇ -olefin copolymer can be adjusted. For example, when the supply amount of hydrogen is large, Mw / Mn tends to decrease. When the supply amount of hydrogen is small, the viscosity tends to increase.
- the amount of the vanadium compound supplied to the polymerization tank is 0.002 parts by mass or more and 0.2 parts by mass or less, or 0.003 parts by mass or more and 0.1 parts by mass or less per 100 parts by mass of the solvent supplied to the polymerization tank. It may be.
- the amount of the vanadium compound relative to the solvent the viscosity of the ethylene- ⁇ -olefin copolymer rubber can be adjusted. For example, there is a tendency that the viscosity can be increased by increasing the amount of the vanadium compound.
- Component (B) Silane Coupling Agent Containing Sulfur Atom
- the silane coupling agent of Component (B) is not particularly limited as long as it has an organic group containing a sulfur atom and bonded to a silicon atom. Contains two or more sulfur atoms joined together in series. It is considered that the reaction of radical species formed by cleavage of bonds between sulfur atoms contributes to improvement in adhesive strength.
- the silane coupling agent containing a sulfur atom can be, for example, one or more compounds represented by the following formula (1).
- n represents a numerical value of 1 or more. n may be an average value of 2 to 6.
- Y 1 , Y 2 and Y 3 are each independently a hydrogen atom, a halogen atom, a hydroxyl group, an amino group, an alkoxy group which may have a substituent, or an alkyl which may have a substituent.
- a silane coupling agent having a silyl group substituted with these groups can easily form an interaction or chemical bond with the metal surface, and can particularly effectively contribute to an improvement in adhesive strength.
- At least one of Y 1 , Y 2 and Y 3 may be a hydrogen atom, a halogen atom, a hydroxyl group, an amino group, or an alkoxy group which may have a substituent.
- alkoxy group include methoxy group, ethoxy group, n-propoxy group, isopropoxy group, n-butoxy group, sec-butoxy group, tert-butoxy group, n-pentyloxy group, n-hexyloxy group, n Examples include -octyloxy group, n-dodecyloxy group, cyclopentyloxy group, cyclohexyloxy group, phenoxy group and benzyloxy group.
- alkyl group examples include a methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, sec-butyl group, tert-butyl group, n-pentyl group, n-hexyl group, and n-octyl group. , N-dodecyl group, cyclopentyl group and cyclohexyl group.
- alkenyl group examples include a vinyl group, an allyl group, a 1-propenyl group, and an isopropenyl group.
- alkynyl group examples include ethynyl group and 2-propynyl group.
- Examples of the aryl group include a phenyl group, a methylphenyl group, an ethylphenyl group, a benzyl group, a tolyl group, and a xylyl group.
- Examples of the aralkyl group include a benzyl group.
- the substituent bonded to these is, for example, at least one selected from a halogen atom, a hydroxy group, a formyl group, an acyl group, a carboxy group, an amino group, a nitro group, a cyano group, an imidazole group, and a sulfo group. it can.
- A represents a carbon linear or branched alkylene group.
- the alkylene group include a methylene group, ethylene group, n-propylene group, isopropylene group, cyclopropylene group, n-butylene group, isobutylene group, sec-butylene group, tert-butylene group, cyclobutylene group, 1- Methyl-cyclopropylene group, 2-methyl-cyclopropylene group, n-pentylene group, 1-methyl-n-butylene group, 2-methyl-n-butylene group, 3-methyl-n-butylene group, 1,1- Dimethyl-n-propylene group, 1,2-dimethyl-n-propylene group, 2,2-dimethyl-n-propylene group, 1-ethyl-n-propylene group, cyclopentylene group, 1-methyl-cyclobutylene group 2-methyl-cyclobutylene group, 3-methyl-cyclobutylene group, 1,2-dimethyl-cycl
- Z is -A-SiY 1 Y 2 Y 3 , hydrogen atom, halogen atom, formyl group, acyl group, carboxy group, amino group, nitro group, imidazole group, sulfo group, alkyl group optionally having substituent (s)
- a in -A-SiY 1 Y 2 Y 3 , Y 1, Y 2 and Y 3 have the same meanings as A, Y 1, Y 2 and Y 3 in the formula (1).
- alkyl group examples include a methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, sec-butyl group, tert-butyl group, n-pentyl group, n-hexyl group, and n-octyl group. , N-dodecyl group, cyclopentyl group and cyclohexyl group.
- alkenyl group examples include a vinyl group, an allyl group, a 1-propenyl group, and an isopropenyl group.
- alkynyl group examples include ethynyl group and 2-propynyl group.
- Examples of the aryl group include a phenyl group, a methylphenyl group, an ethylphenyl group, a benzyl group, a tolyl group, and a xylyl group.
- Examples of the aralkyl group include a benzyl group.
- the substituent bonded to these can be, for example, at least one selected from a halogen atom, a hydroxy group, a formyl group, an acyl group, a carboxy group, an amino group, a nitro group, an imidazole group, and a sulfo group.
- Specific examples of the compound represented by the formula (1) include bis (3-triethoxysilylpropyl) tetrasulfide, bis (3-trimethoxysilylpropyl) tetrasulfide, bis (3-methyldimethoxysilylpropyl) tetrasulfide, bis (2-triethoxysilylethyl) tetrasulfide, bis (3-triethoxysilylpropyl) disulfide, bis (3-trimethoxysilylpropyl) disulfide, bis (3-methyldimethoxysilylpropyl) disulfide, bis (2-triethoxy Silylethyl) disulfide, bis (3-triethoxysilylpropyl) trisulfide, bis (3-trimethoxysilylpropyl) trisulfide, bis (3-methyldimethoxysilylpropyl) trisulfide, bis (2-triethoxy) Silyleth
- silane coupling agents containing a sulfur atom include Si75 (bis (3-triethoxysilylpropyl) disulfide) manufactured by Evonik Degussa, and Si69 (bis (3-triethoxysilylpropyl) manufactured by Evonik Degussa. Tetrasulfide).
- the content of the silane coupling agent containing a sulfur atom in the rubber composition is typically 2.7 to 12 parts by mass with respect to 100 parts by mass of the ethylene- ⁇ -olefin copolymer rubber. It may be 5 to 9.0 parts by mass.
- the content of the silane coupling agent containing a sulfur atom in the rubber composition is typically 2.7 to 12 parts by mass with respect to 100 parts by mass of the ethylene- ⁇ -olefin copolymer rubber. It may be 5 to 9.0 parts by mass.
- Sulfur used as a vulcanizing agent is not particularly limited, but may be powdered sulfur, precipitated sulfur, colloidal sulfur, surface-treated sulfur, or insoluble sulfur.
- the content of sulfur in the rubber composition may be 0.01 to 10 parts by mass, or 0.1 to 5 parts by mass with respect to 100 parts by mass of the ethylene- ⁇ -olefin copolymer rubber.
- the rubber composition of the present embodiment can further contain other components in addition to the components described above as long as the effects of the present invention are not significantly impaired.
- other components include reinforcing agents, softeners, vulcanization accelerators, vulcanization aids, processing aids, and rubber components other than the ethylene- ⁇ -olefin copolymer rubber.
- reinforcing agents include various carbon blacks such as SRF, GPF, FEF, MAF, ISAF, SAF, FT, and MT, calcium carbonate, mica, magnesium silicate, aluminum silicate, lignin, aluminum hydroxide, and magnesium hydroxide. Etc. These may be used alone or in combination of two or more.
- the content of the reinforcing agent in the rubber composition may be 200 parts by mass or less, or 150 parts by mass or less with respect to 100 parts by mass of the ethylene- ⁇ -olefin copolymer rubber.
- softeners examples include process oil, lubricating oil, paraffin oil such as paraffin and liquid paraffin, naphthenic oil, petroleum asphalt, petroleum jelly, coal tar pitch, castor oil, flaxseed oil, sub, beeswax, ricinoleic acid, etc. It is done. These may be used alone or in combination of two or more.
- the content of the softening agent in the rubber composition may be 100 parts by mass or less or 70 parts by mass or less with respect to 100 parts by mass of the ethylene- ⁇ -olefin copolymer rubber.
- tetramethylthiuram monosulfide tetramethylthiuram disulfide, tetraethylthiuram disulfide, tetrabutylthiuram disulfide, dipentamethylenethiuram monosulfide, dipentamethylenethiuram disulfide, dipentamethylenethiuram tetrasulfide, N, N '-Dimethyl-N, N'-diphenylthiuram disulfide, N, N'-dioctadecyl-N, N'-diisopropylthiuram disulfide, N-cyclohexyl-2-benzothiazole-sulfenamide, N-oxydiethylene-2-benzothiazole -Sulfenamide, N, N-diisopropyl-2-benzothiazole sulfenamide, 2-mercaptobenzothiazole, 2- (2,4-dini
- the content of the vulcanization accelerator in the rubber composition is 0.05 parts by mass or more and 20 parts by mass or less, or 0.1 parts by mass or more and 8 parts by mass with respect to 100 parts by mass of the ethylene- ⁇ -olefin copolymer rubber. Or less.
- processing aids include fatty acids such as oleic acid, palmitic acid and stearic acid; fatty acid metal salts such as zinc laurate, zinc stearate, barium stearate and calcium stearate; fatty acid esters; ethylene glycol and polyethylene glycol Glycol. These can be used alone or in combination.
- the content of the processing aid in the rubber composition is 0.2 parts by mass or more and 10 parts by mass or less, or 0.3 parts by mass or more and 8 parts by mass with respect to 100 parts by mass of the ethylene- ⁇ -olefin copolymer rubber. It may be the following.
- Examples of rubber components other than ethylene- ⁇ -olefin copolymer rubber include natural rubber, isoprene rubber, butadiene rubber, styrene butadiene rubber, and butyl rubber.
- the content of the rubber component other than the system copolymer rubber in the rubber composition is 10 to 40 parts by mass, or 15 to 30 parts by mass with respect to 100 parts by mass of the ethylene- ⁇ -olefin copolymer rubber. It may be less than or equal to parts by mass.
- the rubber composition can be obtained, for example, by kneading a mixture containing ethylene- ⁇ -olefin copolymer rubber and other components. Kneading can be performed using a closed kneader such as a mixer, a kneader, or a twin screw extruder. Kneading can be performed until each component is uniformly mixed.
- the kneading time may be 1 minute or more and 60 minutes or less.
- the kneading temperature may be 40 ° C. or higher and 200 ° C. or lower.
- Oil-extended rubber obtained by mixing ethylene- ⁇ -olefin copolymer rubber and process oil such as paraffinic oil and naphthenic oil may be used in the production of the rubber composition.
- FIG. 1 is a cross-sectional view showing an embodiment of a metal-rubber composite molded body.
- a metal-rubber molded body 5 shown in FIG. 1 includes a metal member 1 and a rubber molded body 3 bonded directly to the metal member 1.
- the rubber molded body 3 includes a vulcanized product of the rubber composition according to the above-described embodiment.
- the rubber molded body 3 is directly bonded to the surface of the metal member 1 without using an adhesive.
- the rubber molded body 3 is formed, for example, by molding a rubber composition in a mold in contact with the metal member 1 to form the rubber molded body 3 directly bonded to the metal member 1, and rubber. And vulcanizing the composition.
- the rubber composition may be vulcanized while thermoforming the rubber molded body, or after the rubber molded body 3 is formed, the rubber composition forming the rubber molded body 3 may be vulcanized.
- the rubber composition is molded in a mold while being heated to 120 ° C. or higher and 250 ° C. or lower, or 140 ° C. or higher and 220 ° C. or lower with a molding machine such as an injection molding machine, a compression molding machine, or a hot air vulcanizer
- a molding machine such as an injection molding machine, a compression molding machine, or a hot air vulcanizer
- the molding time is, for example, 1 minute to 60 minutes.
- the metal constituting the metal member is not particularly limited and can be selected from a wide range of metals.
- the metal member is, for example, magnesium, calcium, barium, titanium, zirconium, iron, cobalt, beryllium, aluminum, chromium, manganese, nickel, copper, zinc, tin, cadmium, silver, platinum, gold, lead, or a combination thereof
- a molded body of an alloy containing The metal member may be a molded body of iron, aluminum, magnesium, or an alloy containing one or more of these.
- the metal member may be a formed body of steel, stainless steel, or aluminum.
- the metal-rubber composite molded body can be used for various members such as rubber rolls, anti-vibration rubber for automobiles, and seismic isolation rubber for buildings.
- the shapes of the metal member and the rubber molded body are not particularly limited, and are designed according to the application.
- the IR index was calculated according to the formula (I).
- A is the transmittance of the base peak
- B is the transmittance of the peak derived from 5-ethylidene-2-norbornene
- D (mm) is the thickness of the film.
- IR index Log (A / B) / D
- a calibration curve for iodine value represented by the following formula (II) was obtained from the IR index and the known iodine value.
- ⁇ and ⁇ are constants.
- Iodine value ⁇ ⁇ IR index + ⁇ Formula (II)
- the IR index of the film obtained by molding the ethylene- ⁇ -olefin copolymer rubber was measured, and the iodine value of the ethylene- ⁇ -olefin copolymer rubber was determined from the value and the above calibration curve.
- Ethylene- ⁇ -olefin copolymer rubber / EPDM-1 Ethylene-propylene-5-ethylidene-2-norbornene copolymer rubber having the following characteristics: Ethylene unit content: 50% by mass Propylene unit content: 40.5% by mass Iodine number: 21 Molecular weight distribution: 5.5
- EPDM-2 ethylene-propylene-5-ethylidene-2-norbornene copolymer rubber having the following characteristics: ethylene unit content: 52% by mass Propylene unit content: 44% by mass Iodine number: 10 Molecular weight distribution: 3.4
- Si75 (trade name): bis (3-triethoxysilylpropyl) disulfide, Evonik Degussa, Si69 (trade name): bis (3-triethoxysilylpropyl) tetra Sulfide, manufactured by Evonik Degussa
- Zinc acrylate Asada Chemical Co., Ltd., trade name “ZDA-90” • Dynasylan MEMO (trade name): 3- (methacryloyloxy) propyltrimethoxysilane, manufactured by Evonik Degussa • Carbon black: manufactured by Asahi Carbon Co., Ltd., trade name “Asahi 60UG” Paraffin oil: Idemitsu Kosan Co., Ltd., trade name “Diana PW380” -Zinc oxide: manufactured by Shodo Chemical Industry Co., Ltd., trade name “Zinc oxide 2 types” ⁇ Stearic acid: New Nippon Rika Co., Ltd., trade name “Stearic acid 50S” ⁇ Zinc di-n-butyldithiocarbamate: manufactured by Rhein Chemie, trade name “Lenogran ZDBC-80” Tetramethylthiuram disulfide: manufactured by Rhein Chemie, trade name Renogran TMTD-80 Dipent
- Example 1 (Preparation of rubber composition) 1700 mL Banbury mixer (Kobe Steel Co., Ltd.) with 100 parts by mass of EPDM-1, 3 parts by mass of a silane coupling agent (Si75) containing sulfur atoms, and the following additives as other components adjusted to a start temperature of 70 ° C. For 4 minutes at a rotor rotation speed of 80 rpm.
- Other ingredients Carbon black: 100 parts by mass Paraffin oil: 50 parts by mass Zinc oxide: 5 parts by mass Stearic acid: 1 part by mass
- Examples 2-5, Comparative Examples 1-7 A rubber composition and a metal-rubber composite molded article were produced in the same manner as in Example 1 except that the type of each component, the blending ratio, and the metal member were changed as shown in Table 1 or Table 2. Evaluation was performed.
- surface is a mass part.
- the types and compounding ratios of components not specified in the table are common in all examples and comparative examples.
- each of the rubber compositions of Examples formed a rubber molded body having high adhesion to a metal member.
- the rubber composition of Comparative Examples 1 and 6 lacking a sulfur atom-containing silane coupling agent or Comparative Examples 1 and 6 and the rubber of Comparative Examples 2 to 4 having a silane coupling agent content containing a sulfur atom of less than 2.7 parts by mass The composition, the rubber composition of Comparative Example 5 in which the content of the silane coupling agent containing sulfur atoms exceeds 12 parts by mass, and the rubber composition of Comparative Example 7 containing zinc acrylate, containing sulfur atoms
- the adhesion of the rubber molded body to the metal was not sufficient.
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Abstract
Description
(A)エチレン単位及び炭素数3以上のα-オレフィン単位を有するエチレン-α-オレフィン系共重合体ゴムと、
(B)硫黄原子を含むシランカップリング剤と、
(C)硫黄を含む加硫剤と、
を含有するゴム組成物を提供する。このゴム組成物において、硫黄原子を含むシランカップリング剤の含有量が、エチレン-α-オレフィン系共重合体ゴム100質量部に対して2.7~12質量部である。このゴム組成物は、金属部材に直接加硫接着されたゴム成形体を形成するために用いられる、直接加硫接着用ゴム組成物である。言い換えると、本発明の一側面は、上記ゴム組成物の、金属部材と、金属部材に直接接着し上記ゴム組成物の加硫物を含むゴム成形体と、を備える金属-ゴム複合成形体を製造するための使用又は応用に関する。
一実施形態に係るゴム組成物は、成分(A)としてエチレン-α-オレフィン系共重合体ゴムと、成分(B)として硫黄原子を含むシランカップリング剤と、成分(C)として硫黄を含む加硫剤とを含有する。
一実施形態に係る成分(A)のエチレン-α-オレフィン系共重合体ゴムは、エチレン単位及び炭素数3以上のα-オレフィン単位を主な単量体単位として含む。α-オレフィン単位の炭素数は3以上20以下であってもよい。エチレン-α-オレフィン系共重合体ゴムにおける、エチレン単位とα-オレフィン単位の合計の含有量は、エチレン-α-オレフィン系共重合体ゴムの全体質量に対して、60質量%以上100質量%以下、又は80質量%以上100質量%以下であってもよい。本明細書において、「エチレン単位」、「α-オレフィン単位」、「非共役ポリエン単位」のような「モノマー名+単位」という用語は、「該モノマーに由来するモノマー単位」を意味する。
1,4-ヘキサジエン、1,6-オクタジエン、2-メチル-1,5-ヘキサジエン、6-メチル-1,5-ヘプタジエン、及び7-メチル-1,6-オクタジエン等の鎖状非共役ジエン;
シクロヘキサジエン、ジシクロペンタジエン、5-ビニルノルボルネン、5-エチリデン-2-ノルボルネン、5-(2-プロペニル)-2-ノルボルネン、5-(3-ブテニル)-2-ノルボルネン、5-(4-ペンテニル)-2-ノルボルネン、5-(5-ヘキセニル)-2-ノルボルネン、5-(6-ヘプテニル)-2-ノルボルネン、5-(7-オクテニル)-2-ノルボルネン、5-メチレン-2-ノルボルネン、及び6-クロロメチル-5-イソプロペニル-2-ノルボルネン等の環状非共役ジエン;並びに、
4-エチリデン-8-メチル-1,7-ノナジエン、5,9,13-トリメチル-1,4,8,12-テトラデカジエン、4-エチリデン-12-メチル-1,11-ペンタデカジエン、2,3-ジイソプロピリデン-5-ノルボルネン、2-エチリデン-3-イソプロピリデン-5-ノルボルネン、2-プロペニル-2,2-ノルボルナジエン、1,3,7-オクタトリエン、6,10-ジメチル-1,5,9-ウンデカトリエン、5,9-ジメチル-1,4,8-デカトリエン、13-エチル-9-メチル-1,9,12-ペンタデカトリエン、5,9,8,14,16-ペンタメチル-1,7,14-ヘキサデカトリエン、及び1,4,9-デカトリエン等のトリエン
が挙げられる。これらは単独で又は2種以上の組み合わせでエチレン-α-オレフィン系共重合体ゴムを構成することができる。これらのうち、5-エチリデン-2-ノルボルネン、ジシクロペンタジエン、5-ビニルノルボルネン又はこれらの組合せをモノマー単位としてエチレン-α-オレフィン系共重合体ゴムが含んでいてもよい。
・GPC装置:東ソー株式会社製、商品名HLC-8121GPC/HT
・カラム:東ソー株式会社製、商品名TSKgel GMHHR-H(S)HT
・分子量標準物質:分子量500以上20,000,000以下のポリスチレン
・溶出溶媒流速:1.0mL/min
・試料濃度:1mg/mL
・測定温度:140℃
・溶出溶媒:オルトジクロロベンゼン
・注入量:500μL
・検出器:示差屈折計
VO(OR)mX3-m (1)
[式中、Rは炭素原子数が1以上8以下の直鎖状炭化水素基を表し、Xはハロゲン原子を表し、mは0<m≦3を充足する数を表す。]
R”jAlX”3-j (2)
[式中、R”は炭化水素基を表し、X”はハロゲン原子を表し、jは0<j≦3を充足する数を表す。]
成分(B)のシランカップリング剤は、硫黄原子を含みケイ素原子に結合した有機基を有するものであれば、特に制限されないが、典型的には、直列に連続して結合した2個以上の硫黄原子を含む。硫黄原子同士の結合が開裂して形成するラジカル種の反応が、接着強度向上に寄与すると考えられる。
加硫剤として用いられる硫黄は、特に制限されないが、粉末硫黄、沈降硫黄、コロイド硫黄、表面処理硫黄、又は不溶性硫黄であってもよい。ゴム組成物中の硫黄の含有量は、エチレン-α-オレフィン系共重合体ゴム100質量部に対して、0.01~10質量部、又は0.1~5質量部であってもよい。
本実施形態のゴム組成物は、本発明の効果を著しく損なわない範囲で、以上説明した成分に加えて、その他の成分を更に含有することができる。その他の成分の例としては、補強剤、軟化剤、加硫促進剤、加硫助剤、加工助剤、及び、上記エチレン-α-オレフィン系共重合体ゴム以外のゴム成分が挙げられる。
図1は、金属-ゴム複合成形体の一実施形態を示す断面図である。図1に示す金属-ゴム成形体5は、金属部材1と、金属部材1に直接接着したゴム成形体3とを備える。ゴム成形体3は、上述の実施形態に係るゴム組成物の加硫物を含む。ゴム成形体3は、接着剤を介さずに金属部材1の表面に直接接着されている。このゴム成形体3は、例えば、ゴム組成物を、金属部材1と接触させた状態で金型内で成形することで、金属部材1に直接接着したゴム成形体3を形成させることと、ゴム組成物を加硫することとを含む方法によって得ることができる。ゴム成形体を加熱成形しながらゴム組成物を加硫してもよいし、ゴム成形体3を形成した後、ゴム成形体3を形成しているゴム組成物を加硫してもよい。
(1)エチレン単位の含有量及びプロピレン単位の含有量
エチレン-α-オレフィン系共重合体ゴムをホットプレス機により成形して、厚み約0.1mmのフィルムを作製した。このフィルムの赤外吸収スペクトルを、赤外分光光度計(日本分光社製IR-810)により測定した。得られた赤外吸収スペクトルから、参考文献(「赤外吸収スペクトルによるポリエチレンのキャラクタリゼーション」、高山、宇佐美等著、又はDie Makromolekulare Chemie,177,461(1976)Mc Rae,M.A.,MaddamS,W.F.等著)に記載の方法に従って、エチレン単位の含有量及びプロピレン単位の含有量を求めた。
「JIS K0070-1992 6.ヨウ素価」に準拠し、異なる既知のヨウ素価を有する三種類のエチレン-プロピレン-5-エチリデン-2-ノルボルネン共重合体ゴムをそれぞれ、ホットプレス機により成形して、厚み約0.2mmのフィルムを作製した。各フィルムの赤外吸収スペクトルを、赤外分光光度計(日本分光株式会社製IR-700)によって測定した。得られた赤外吸収スペクトルから、各フィルムの5-エチリデン-2-ノルボルネン由来のピーク(1686cm-1の吸収ピーク)とベースピーク(1664~1674cm-1の吸収ピーク)の透過率を求め、下記式(I)によりIRインデックスを算出した。Aはベースピークの透過率、Bは5-エチリデン-2-ノルボルネン由来のピークの透過率、D(mm)はフィルムの厚さである。
IRインデックス=Log(A/B)/D・・・式(I)
IRインデックスと上記の既知のヨウ素価から、下記式(II)で表されるヨウ素価の検量線を得た。式(II)におけるα及びβはそれぞれ定数である。
ヨウ素価=α×IRインデックス+β・・・式(II)
エチレン-α-オレフィン系共重合体ゴムを成形して得たフィルムのIRインデックスを測定し、その値と上記の検量線から、エチレン-α-オレフィン系共重合体ゴムのヨウ素価を求めた。
ゲルパーミエイションクロマトグラフ(GPC)法によって、下記の条件で、エチレン-α-オレフィン系共重合体ゴムの重量平均分子量(Mw)と数平均分子量(Mn)の標準ポリスチレン換算値を測定した。
・GPC装置:東ソー株式会社製、商品名HLC-8121GPC/HT
・カラム:東ソー株式会社製、商品名TSKgel GMHHR-H(S)HT
・分子量標準物質:分子量500以上20,000,000以下のポリスチレン
・溶出溶媒流速:1.0mL/min
・試料濃度:1mg/mL
・測定温度:140℃
・溶出溶媒:オルトジクロロベンゼン
・注入量:500μL
・検出器:示差屈折計
以下の原料を準備した。
(A)エチレン-α-オレフィン系共重合体ゴム
・EPDM-1:以下の特性を有するエチレン-プロピレン-5-エチリデン-2-ノルボルネン共重合体ゴム
エチレン単位の含有量:50質量%
プロピレン単位の含有量:40.5質量%
ヨウ素価:21
分子量分布:5.5
・EPDM-2:以下の特性を有するエチレン-プロピレン-5-エチリデン-2-ノルボルネン共重合体ゴム
エチレン単位の含有量:52質量%
プロピレン単位の含有量:44質量%
ヨウ素価:10
分子量分布:3.4
・Si75(商品名):ビス(3-トリエトキシシリルプロピル)ジスルフィド、Evonik Degussa社製
・Si69(商品名):ビス(3-トリエトキシシリルプロピル)テトラスルフィド、Evonik Degussa社製
・硫黄:鶴見化学工業株式会社製、商品名「金華印微粉硫黄 200mesh」
・アクリル酸亜鉛:浅田化学株式会社製、商品名「ZDA-90」
・Dynasylan MEMO(商品名):3-(メタクリロイルオキシ)プロピルトリメトキシシラン、Evonik Degussa社製
・カーボンブラック:旭カーボン社製、商品名「旭60UG」
・パラフィンオイル:出光興産株式会社製、商品名「Diana PW380」
・酸化亜鉛:正同化学工業社製、商品名「酸化亜鉛 2種」
・ステアリン酸:新日本理化社製、商品名「ステアリン酸 50S」
・ジ-n-ブチルジチオカルバミン酸亜鉛:ラインケミー社製、商品名「レノグランZDBC-80」
・テトラメチルチウラムジスルフィド:ラインケミー社製、商品名レノグランTMTD-80
・ジペンタメチレンチウラムテトラスルフィド:ラインケミー社製、商品名「レノグランDPTT-70」
・2-メルカプトベンゾチアゾール:ラインケミー社製、商品名「レノグランMBT-80」
(ゴム組成物の調製)
EPDM-1を100質量部、硫黄原子を含有するシランカップリング剤(Si75)3質量部、及び、その他の成分として以下の添加剤を、スタート温度70℃に調整した1700mLのバンバリーミキサー(神戸製鋼社製)を用い、ローター回転数80rpmで4分間混練した。
その他の成分:
・カーボンブラック:100質量部
・パラフィンオイル:50質量部
・酸化亜鉛:5質量部
・ステアリン酸:1質量部
金属-ゴム複合成形体を作製するために、以下の金属部材を準備した。
・鋼板(鉄鋼板):SS400(長さ60mm、幅25mm、板厚2.0mm)
・ステンレス鋼板:SUS304(長さ60mm、幅25mm、板厚2.0mm)
・アルミ板:純アルミ板(純度99.5%、長さ60mm、幅25mm、板厚3.0mm)
得られたゴム組成物を、金型内の鋼板上に載せ、その状態で、170℃に設定された100トンプレス(商品名:PSF-B010、関西ロール株式会社製)を用いて、プレス機のプレス面をゴム組成物に押し当て、ゴム組成物を30分間、加熱及び圧縮した。これにより、鋼板と、鋼板表面に直接加硫接着したシート状のゴム成形体(長さ125mm、幅25mm、厚み:6mm)とからなる金属-ゴム複合部材(全体厚み:8mm)を形成させた。プレス機のプレス面とゴム組成物との間にテフロン(登録商標)シートを敷くことにより、プレス機のプレス面へのゴムの接着を防止した。
得られた金属-ゴム複合成形体を用いて、鋼板に対するゴム成形体の接着性を、JIS K 6256-2に準拠して測定した。表1及び表2に示す剥離状態に関して、「R」はゴム成形体が破壊した材料破壊であったことを意味し、「D」は界面剥離であったことを意味する。
各成分の種類、その配合比、及び金属部材を表1又は表2に示す通りに変更したこと以外は実施例1と同様にして、ゴム組成物及び金属-ゴム複合成形体を製造し、その評価を行った。表中の配合比は質量部である。表に明記されない成分の種類及び配合比は、全ての実施例及び比較例において共通である。
Claims (7)
- (A)エチレン単位及び炭素数3以上のα-オレフィン単位を含むエチレン-α-オレフィン系共重合体ゴムと、
(B)硫黄原子を含むシランカップリング剤と、
(C)硫黄を含む加硫剤と、
を含有し、
前記シランカップリング剤の含有量が、前記エチレン-α-オレフィン系共重合体ゴム100質量部に対して2.7~12質量部であり、
金属部材に直接加硫接着されたゴム成形体を形成するために用いられる、直接加硫接着用ゴム組成物。 - 前記硫黄原子を含むシランカップリング剤が、下記式(1)で表されるケイ素化合物を含む、請求項1に記載の直接加硫接着用ゴム組成物。
Y1、Y2及びY3はそれぞれ相互に独立して、水素原子、ハロゲン原子、ヒドロキシル基、アミノ基、置換基を有していてもよいアルコキシ基、置換基を有していてもよいアルキル基、置換基を有していてもよいアルケニル基、置換基を有していてもよいアルキニル基、置換基を有していてもよいアリール基、又は置換基を有していてもよいアラルキル基を示し、
Aは直鎖状又は分枝状のアルキレン基を示し、
Zは式:-A-SiY1Y2Y3(A、Y1、Y2及びY3は前記と同義である。)で表される基、水素原子、ハロゲン原子、ホルミル基、アシル基、カルボキシ基、アミノ基、ニトロ基、イミダゾール基、スルホ基、置換基を有していてもよいアルキル基、置換基を有していてもよいアルケニル基、置換基を有していてもよいアルキニル基、置換基を有していてもよいアリール基、又は置換基を有していてもよいアラルキル基を示す。] - 前記硫黄の含有量が、前記エチレン-α-オレフィン系共重合体ゴム100質量部に対して、10質量部以下である、請求項1又は2に記載の直接加硫接着用ゴム組成物。
- 金属部材と、前記金属部材に直接接着し請求項1~3のいずれか一項に記載のゴム組成物の加硫物を含むゴム成形体と、を備える金属-ゴム複合成形体。
- 前記金属部材が鉄、アルミニウム、マグネシウム又はこれらのうち1種以上を含む合金の成形体である、請求項4に記載の金属-ゴム複合成形体。
- 請求項1~3のいずれか一項に記載のゴム組成物を金属部材と接触させた状態で成形することで、前記金属部材に直接接着したゴム成形体を形成させることと、前記ゴム組成物を加硫することとを含む、金属-ゴム複合成形体の製造方法。
- 前記金属部材が鉄、アルミニウム、マグネシウム又はこれらのうち1種以上を含む合金の成形体である、請求項6に記載の金属-ゴム複合成形体の製造方法。
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CN201880032865.2A CN110621736A (zh) | 2017-05-19 | 2018-05-15 | 直接硫化粘接用橡胶组合物和金属-橡胶复合成形体 |
US16/613,398 US20200164621A1 (en) | 2017-05-19 | 2018-05-15 | Rubber composition for direct vulcanization bonding and molded metal/rubber composite |
EP18802993.8A EP3626775A4 (en) | 2017-05-19 | 2018-05-15 | RUBBER COMPOSITION FOR BONDING BY DIRECT VULCANIZATION AND METAL / RUBBER COMPOSITE |
JP2019518803A JPWO2018212180A1 (ja) | 2017-05-19 | 2018-05-15 | 直接加硫接着用ゴム組成物、及び金属−ゴム複合成形体 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020045454A1 (ja) * | 2018-08-30 | 2020-03-05 | 住友化学株式会社 | ゴム組成物、金属-ゴム複合成形体、及び、金属-ゴム複合成形体の製造方法 |
WO2022071498A1 (ja) * | 2020-10-02 | 2022-04-07 | 住友化学株式会社 | 複合成形体、及び複合成形体用ゴム組成物 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57137330A (en) * | 1981-02-19 | 1982-08-24 | Bando Chem Ind Ltd | Rubber composition |
JPS5973944A (ja) * | 1982-10-22 | 1984-04-26 | 株式会社ブリヂストン | ゴムと金属材との複合物 |
JPH05311008A (ja) | 1992-05-13 | 1993-11-22 | Sumitomo Chem Co Ltd | 加硫接着用ゴム組成物、加硫接着方法及び金属−ゴム接着物品 |
JPH07278321A (ja) * | 1994-04-08 | 1995-10-24 | Sumitomo Chem Co Ltd | 加硫接着方法 |
JPH11505879A (ja) | 1995-05-22 | 1999-05-25 | キャボット コーポレイション | ケイ素処理カーボンブラックを含有するエラストマーのコンパウンド |
JPH11181149A (ja) * | 1997-12-25 | 1999-07-06 | Bridgestone Corp | 金属との複合体用ゴム組成物 |
JP2012177068A (ja) * | 2011-02-04 | 2012-09-13 | Mitsuboshi Belting Ltd | 接着ゴム組成物及び接着処理繊維並びに動力伝動用ベルト |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4236218C2 (de) * | 1991-12-19 | 2001-08-16 | Degussa | Vulkanisierbare EPDM-Kautschukmischungen |
JP2005125996A (ja) * | 2003-10-27 | 2005-05-19 | Yokohama Rubber Co Ltd:The | タイヤホイール組立体 |
JP2006052281A (ja) * | 2004-08-11 | 2006-02-23 | Dow Corning Toray Co Ltd | 防振・免振用のゴム組成物およびその調製方法、並びに、防振・免振用ゴム製品およびその製造方法 |
NL2000330C2 (nl) * | 2006-11-23 | 2008-05-26 | Vredestein Banden B V | Polymeersamenstelling. |
JPWO2015186636A1 (ja) * | 2014-06-06 | 2017-04-20 | 横浜ゴム株式会社 | 外幌用ゴム組成物および鉄道車両用の外幌 |
KR101979529B1 (ko) * | 2015-03-26 | 2019-05-16 | 미쓰이 가가쿠 가부시키가이샤 | 철도 레일용 궤도 패드용 조성물 및 철도 레일용 궤도 패드 |
-
2018
- 2018-05-15 WO PCT/JP2018/018761 patent/WO2018212180A1/ja active Application Filing
- 2018-05-15 US US16/613,398 patent/US20200164621A1/en not_active Abandoned
- 2018-05-15 CN CN201880032865.2A patent/CN110621736A/zh active Pending
- 2018-05-15 EP EP18802993.8A patent/EP3626775A4/en not_active Withdrawn
- 2018-05-15 JP JP2019518803A patent/JPWO2018212180A1/ja active Pending
- 2018-05-17 TW TW107116789A patent/TW201900751A/zh unknown
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57137330A (en) * | 1981-02-19 | 1982-08-24 | Bando Chem Ind Ltd | Rubber composition |
JPS5973944A (ja) * | 1982-10-22 | 1984-04-26 | 株式会社ブリヂストン | ゴムと金属材との複合物 |
JPH05311008A (ja) | 1992-05-13 | 1993-11-22 | Sumitomo Chem Co Ltd | 加硫接着用ゴム組成物、加硫接着方法及び金属−ゴム接着物品 |
JPH07278321A (ja) * | 1994-04-08 | 1995-10-24 | Sumitomo Chem Co Ltd | 加硫接着方法 |
JPH11505879A (ja) | 1995-05-22 | 1999-05-25 | キャボット コーポレイション | ケイ素処理カーボンブラックを含有するエラストマーのコンパウンド |
JPH11181149A (ja) * | 1997-12-25 | 1999-07-06 | Bridgestone Corp | 金属との複合体用ゴム組成物 |
JP2012177068A (ja) * | 2011-02-04 | 2012-09-13 | Mitsuboshi Belting Ltd | 接着ゴム組成物及び接着処理繊維並びに動力伝動用ベルト |
Non-Patent Citations (4)
Title |
---|
"Mutual Adhesion of Rubber with Metals", JOURNAL OF THE CHEMISTRY SOCIETY OF JAPAN, vol. 73, no. 1, 1970, pages 54 |
MC RAE, M.A.MADDAM S, W.F., DIE MAKROMOLEKULARE CHEMIE, vol. 177, 1976, pages 461 |
See also references of EP3626775A4 |
TAKAYAMA, USAMI, CHARACTERIZATION OF POLYETHYLENE BY INFRARED ABSORPTION SPECTRUM |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020045454A1 (ja) * | 2018-08-30 | 2020-03-05 | 住友化学株式会社 | ゴム組成物、金属-ゴム複合成形体、及び、金属-ゴム複合成形体の製造方法 |
WO2022071498A1 (ja) * | 2020-10-02 | 2022-04-07 | 住友化学株式会社 | 複合成形体、及び複合成形体用ゴム組成物 |
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