WO2012073838A1 - タイヤトレッド用ゴム組成物 - Google Patents
タイヤトレッド用ゴム組成物 Download PDFInfo
- Publication number
- WO2012073838A1 WO2012073838A1 PCT/JP2011/077252 JP2011077252W WO2012073838A1 WO 2012073838 A1 WO2012073838 A1 WO 2012073838A1 JP 2011077252 W JP2011077252 W JP 2011077252W WO 2012073838 A1 WO2012073838 A1 WO 2012073838A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- group
- rubber
- conjugated diene
- weight
- diene polymer
- Prior art date
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L15/00—Compositions of rubber derivatives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
- B60C1/0016—Compositions of the tread
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08C19/00—Chemical modification of rubber
- C08C19/30—Addition of a reagent which reacts with a hetero atom or a group containing hetero atoms of the macromolecule
- C08C19/42—Addition of a reagent which reacts with a hetero atom or a group containing hetero atoms of the macromolecule reacting with metals or metal-containing groups
- C08C19/44—Addition of a reagent which reacts with a hetero atom or a group containing hetero atoms of the macromolecule reacting with metals or metal-containing groups of polymers containing metal atoms exclusively at one or both ends of the skeleton
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F236/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds
- C08F236/02—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds
- C08F236/04—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated
- C08F236/10—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated with vinyl-aromatic monomers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L57/00—Compositions of unspecified polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C08L57/02—Copolymers of mineral oil hydrocarbons
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08C19/00—Chemical modification of rubber
- C08C19/25—Incorporating silicon atoms into the molecule
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
Definitions
- the present invention relates to a rubber composition for a tire tread, and more particularly to a rubber composition for a tire tread that is improved in low rolling resistance and wet performance.
- Patent Document 1 improves the dispersibility of silica with a rubber composition in which silica is blended with a terminal-modified solution-polymerized styrene butadiene rubber whose terminal is modified with polyorganosiloxane or the like, and the exothermic property (tan ⁇ at 60 ° C.) is improved. It has been proposed to reduce and increase wet grip properties (tan ⁇ at 0 ° C.).
- Patent Document 2 discloses a rubber composition in which 80 to 180 parts by weight of a filler containing 50 parts by weight or more of silica and 5 to 60 parts by weight of a resin having a softening point of 100 to 150 ° C. are blended with 100 parts by weight of a styrene butadiene copolymer rubber. Proposing things.
- An object of the present invention is to provide a rubber composition for a tire tread in which the low rolling resistance and the wet performance are improved to the conventional level or more.
- the rubber composition for a tire tread of the present invention that achieves the above object is provided by filling 1 to 25 parts by weight of a tackifying resin with respect to 100 parts by weight of a diene rubber containing 30% by weight or more of a modified conjugated diene polymer rubber. 25 to 80 parts by weight of an agent is added, the filler contains 50% by weight or more of silica, and the modified conjugated diene polymer rubber is conjugated using an organic active metal compound as an initiator in a hydrocarbon solvent.
- An active conjugated diene polymer chain obtained by copolymerizing a diene monomer and an aromatic vinyl monomer is reacted with at least one compound having a functional group capable of reacting with the active terminal of the polymer chain.
- the terminal modified group contains a functional group that interacts with silica
- the modified conjugated diene polymer rubber has an aromatic vinyl unit content of 38 to 48% by weight, vinyl unit The content is 20 to 35%, the weight average molecular weight is 600,000 to 1,000,000, the glass transition temperature is ⁇ 22 to ⁇ 32 ° C., and the glass transition temperature of the tackifying resin is the modified conjugated diene polymer rubber.
- the glass transition temperature is higher by 50 to 110 ° C.
- the rubber composition for a tire tread of the present invention has at least one functional group having a reactive group at the active end of an active conjugated diene polymer chain obtained by copolymerizing a conjugated diene monomer and an aromatic vinyl monomer. It has a terminal-modified group obtained by reacting various types of compounds, and this terminal-modified group includes a functional group having an interaction with silica, and has an aromatic vinyl unit content of 38 to 48% by weight and a vinyl unit content of 20 Adhesion to 100 parts by weight of diene rubber containing 30% by weight or more of modified conjugated diene polymer rubber having a weight average molecular weight of 600,000 to 1,000,000 and a glass transition temperature of ⁇ 22 to ⁇ 32 ° C.
- the affinity between the diene rubber and silica is increased and the dispersibility of the silica is improved. Fever While reducing the small to rolling resistance, it is possible to improve the wet performance.
- the modified conjugated diene polymer rubber forms a fine phase separation form and is capable of reacting with the active end of the active conjugated diene polymer chain.
- the terminal modified group generated by the reaction with at least one compound having a group contains a functional group that interacts with silica, and the weight average molecular weight is set to 600,000 to 1,000,000 to optimize the concentration of the terminal modified group
- the terminal-modified group acts efficiently on the silica, further improving the dispersibility of the silica, greatly reducing the low rolling resistance of the pneumatic tire, and further improving the wet performance.
- the glass transition temperature of the tackifying resin is 50 to 110 ° C higher than the glass transition temperature of the modified conjugated diene polymer rubber, further improving wet performance while maintaining excellent low rolling resistance. can do.
- the compound having a functional group capable of reacting with the active end of the active conjugated diene polymer chain described above may include at least one polyorganosiloxane compound selected from the following general formulas (I) to (III).
- R 1 to R 8 are an alkyl group having 1 to 6 carbon atoms or an aryl group having 6 to 12 carbon atoms, and these may be the same or different from each other.
- X 1 and X 4 is an aryl group of the active conjugated diene polymer chain groups having a functional group capable of reacting with the active terminal of an alkyl group or having 6 to 12 carbon atoms having 1 to 6 carbon atoms,, X 1 and X 4 may be the same as or different from each other, X 2 is a group having a functional group that reacts with the active end of the active conjugated diene polymer chain, X 3 is a group of 2 to 20 alkylene glycols A group containing repeating units, and a part of X 3 may be a group derived from a group containing repeating units of 2 to 20 alkylene glycol, m is an integer of 3 to 200, and n is 0 to 200 is an integer, and k is an integer from 0 to 200.) (In the above formula (II), R 9 to R 16 are an alkyl group having 1 to 6 carbon atoms or an aryl group having 6 to 12 carbon atoms, and these may be the
- X 5 to X 8 are groups having a functional group that reacts with the active terminal of the active conjugated diene polymer chain.
- R 17 to R 19 are an alkyl group having 1 to 6 carbon atoms or an aryl group having 6 to 12 carbon atoms, and these may be the same or different from each other.
- 9 to X 11 are groups having a functional group that reacts with the active end of the active conjugated diene polymer chain, and s is an integer of 1 to 18.
- ⁇ Pneumatic tires using this rubber composition in the tread portion can improve low rolling resistance and wet performance to a level higher than conventional levels.
- FIG. 1 is a partial cross-sectional view in the tire meridian direction showing an example of an embodiment of a pneumatic tire using the rubber composition for a tire tread of the present invention.
- FIG. 1 shows an example of an embodiment of a pneumatic tire using a rubber composition for a tire tread, where 1 is a tread portion, 2 is a sidewall portion, and 3 is a bead portion.
- two carcass layers 4 in which reinforcing cords extending in the tire radial direction are arranged at predetermined intervals in the tire circumferential direction between the left and right bead portions 3 and embedded in a rubber layer are extended.
- the portion is folded back from the inner side in the tire axial direction so as to sandwich the bead filler 6 around the bead core 5 embedded in the bead portion 3.
- An inner liner layer 7 is disposed inside the carcass layer 4.
- a belt cover layer 9 is disposed on the outer peripheral side of the belt layer 8.
- a tread portion 1 is formed of a tread rubber layer 12 on the outer peripheral side of the belt cover layer 9.
- the tread rubber layer 12 is composed of a tire tread rubber composition.
- a side rubber layer 13 is disposed outside the carcass layer 4 of each sidewall portion 2, and a rim cushion rubber layer 14 is provided outside the folded portion of the carcass layer 4 of each bead portion 3.
- the rubber component is a diene rubber
- the diene rubber always includes a modified conjugated diene polymer rubber.
- the modified conjugated diene polymer rubber is a conjugated diene polymer rubber produced by solution polymerization that has functional groups at both ends of a molecular chain.
- the skeleton of the modified conjugated diene polymer is composed of a copolymer obtained by copolymerizing a conjugated diene monomer and an aromatic vinyl monomer.
- the conjugated diene monomer include 1,3-butadiene, isoprene (2-methyl-1,3-butadiene), 2,3-dimethyl-1,3-butadiene, and 2-chloro-1,3-butadiene. 1,3-pentadiene and the like.
- aromatic vinyl monomer examples include styrene, 2-methylstyrene, 3-methylstyrene, 4-methylstyrene, ⁇ -methylstyrene, 2,4-dimethylstyrene, 2,4-diisopropylstyrene, 4-tert -Butylstyrene, divinylbenzene, tert-butoxystyrene, vinylbenzyldimethylamine, (4-vinylbenzyl) dimethylaminoethyl ether, N, N-dimethylaminoethylstyrene, vinylpyridine and the like.
- the terminal of the conjugated diene polymer serving as a skeleton is constituted by an isoprene unit block.
- the terminal is constituted by an isoprene unit block
- the affinity between the modified conjugated diene polymer and silica is good, and low heat build-up and wet performance are good.
- the conjugated diene monomer unit constituting the polymer contains a conjugated diene other than the isoprene unit, before adding the compound having a functional group capable of reacting with the active end of the active conjugated diene polymer chain, Alternatively, it is preferable to introduce isoprene unit blocks at the ends of the polymer by adding isoprene to the solution containing the polymer having an active end while adding these compounds separately.
- the conjugated diene polymer is prepared by copolymerizing the above conjugated diene monomer and aromatic vinyl monomer in a hydrocarbon solvent using an organic active metal compound as an initiator.
- the hydrocarbon solvent may be any commonly used solvent, and examples thereof include cyclohexane, n-hexane, benzene, toluene and the like.
- an organic alkali metal compound is preferably used.
- organic monolithium compounds such as n-butyllithium, sec-butyllithium, t-butyllithium, hexyllithium, phenyllithium, stilbenelithium; dilithiomethane
- Organic polyvalent lithium compounds such as 1,4-dilithiobutane, 1,4-dilithio-2-ethylcyclohexane, 1,3,5-trilithiobenzene
- organic sodium compounds such as sodium naphthalene
- organic potassium compounds such as potassium naphthalene Is mentioned.
- 3,3- (N, N-dimethylamino) -1-propyllithium, 3- (N, N-diethylamino) -1-propyllithium, 3- (N, N-dipropylamino) -1- Propyllithium, 3-morpholino-1-propyllithium, 3-imidazole-1-propyllithium and organolithium compounds in which these are chain-extended with 1 to 10 units of butadiene, isoprene or styrene can also be used.
- diethyl ether diethylene glycol dimethyl ether, tetrahydrofuran, 2,2-bis (2-oxolanyl) propane, etc. for the purpose of randomly copolymerizing aromatic vinyl monomers with conjugated diene monomers.
- aprotic polar compounds such as amines such as ethers, triethylamine and tetramethylethylenediamine.
- At least one compound having a reactive functional group is bonded to the active terminal of an active conjugated diene polymer chain obtained by copolymerizing a conjugated diene monomer and an aromatic vinyl monomer.
- the compound having a functional group capable of reacting with the active terminal of the active conjugated diene polymer chain may be bonded to at least one active conjugated diene polymer chain, and one or more active conjugates may be bonded to one compound. Diene polymer chains can be bonded.
- the modified conjugated diene polymer rubber used in the present invention is a modified rubber having modified groups at both ends of the conjugated diene polymer, and optionally other conjugated diene polymers having one or more modified groups. Bonded modified rubbers and mixtures of these modified rubbers can be included.
- the reaction between the active terminal of the active conjugated diene polymer chain and the compound having a functional group capable of reacting with this active terminal can be reacted in one stage or multiple stages. The same or different compounds can be reacted sequentially.
- examples of the compound having a functional group capable of reacting with the active terminal of the active conjugated diene polymer chain include tin compounds, silicon compounds, silane compounds, amide compounds and / or imide compounds, isocyanates and / or isothiocyanates.
- examples of compounds having compounds, ketone compounds, ester compounds, vinyl compounds, oxirane compounds, thiirane compounds, oxetane compounds, polysulfide compounds, polysiloxane compounds, polyorganosiloxane compounds, polyether compounds, polyene compounds, halogen compounds, fullerenes, etc. be able to. Of these, polyorganosiloxane compounds are preferred. These compounds can be bonded to a polymer by combining one type of compound or a plurality of compounds.
- two compounds such as polyglycidyl ethers of polyhydric alcohols such as ethylene glycol diglycidyl ether and glycerin triglycidyl ether, diglycidylated bisphenol A and the like can be reacted with the active terminal of the active conjugated diene polymer chain.
- silicon compound examples include tetrachlorosilicon, tetrabromosilicon, methyltrichlorosilicon, butyltrichlorosilicon, dichlorosilicon, bistrichlorosilylsilicon, and the like.
- tin compound examples include tetrachlorotin, tetrabromotin, methyltrichlorotin, butyltrichlorotin, dichlorotin, bistrichlorosilyltin, and bistrichlorosilyltin.
- silane compound examples include a silane compound containing at least one selected from an alkoxy group, a phenoxy group, and a halogen.
- silane compounds include dimethoxydimethylsilane, diphenoxydimethylsilane, diethoxydiethylsilane, triphenoxymethylsilane, triphenoxyvinylsilane, trimethoxyvinylsilane, triethoxyvinylsilane, tri (2-methylbutoxy) ethylsilane, tri (2-methylbutoxy) vinylsilane, triphenoxyphenylsilane, tetraphenoxysilane, tetraethoxysilane, tetramethoxysilane, tetrakis (2-ethylhexyloxy) silane, phenoxydivinylchlorosilane, methoxybiethylchlorosilane, diphenoxymethylchlorosilane, diphenoxy Phenyl
- the silane compound can have a glycidyl group, an epoxy group, a methacryloxy group, or the like as a functional group other than the above.
- silane compounds include ⁇ -glycidoxyethyltrimethoxysilane, ⁇ -glycidoxypropyltrimethoxysilane, ⁇ -glycidoxybutyltrimethoxysilane, ⁇ -glycidoxypropyltriethoxysilane, ⁇ -Glycidoxypropyltripropoxysilane, ⁇ -glycidoxypropyltributoxysilane, ⁇ -glycidoxypropyltriphenoxysilane, ⁇ -glycidoxypropylmethyldimethoxysilane, ⁇ -glycidoxypropylethyldimethoxysilane, ⁇ -Glycidoxypropylethyldiethoxysilane, ⁇ -glycidoxypropylmethyldiethoxysilane,
- Examples of the isocyanate compound or isothiocyanate compound include 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, diphenylmethane diisocyanate, naphthalene diisocyanate, tolidine diisocyanate, triphenylmethane triisocyanate, p-phenylene diisocyanate, tris (isocyanatophenyl) thiophosphate, xylylene diisocyanate, benzene-1,2,4-triisocyanate, naphthalene-1,2,5,7-tetraisocyanate, naphthalene-1 , 3,7-triisocyanate, phenyl isocyanate, hexamethylene diisocyanate, methylcyclohexane diisocyanate, phenyl-1,4-diisothiocyanate, 2,4-tolylene diisocyanate
- aromatic polyisocyanate compounds such
- a compound represented by the following general formula (IV) is preferable, and a plurality of active conjugated diene polymer chains can be easily bonded to one molecule of the compound.
- X 1 and X 2 are a halogen atom or an alkoxy group having 1 to 20 carbon atoms.
- P and q are each independently an integer of 0 to 3, and represented by the formula (IV).
- the total number of halogen atoms and alkoxy groups having 1 to 20 carbon atoms in the compound is at least 5.
- R 1 and R 2 are each a monovalent hydrocarbon group having 1 to 20 carbon atoms, n is 0 And A 1 and A 2 are each independently a single bond or a divalent hydrocarbon having 1 to 20 carbon atoms, A 3 is represented by the formula — (SiX 3 r R 3 2-r ) m -, or -NR 4 -, or -N (-A 4 -SiX 4 S R 5 3-S) -.
- X 3 is a halogen atom or is .R 3
- R 5 is an alkoxy group having 1 to 20 carbon atoms, a monovalent hydrocarbon group having 1 to 20 carbon atoms .
- R 4 is hydrogen Is a monovalent hydrocarbon group of children having 1 to 20 carbon atoms .
- a 4 is, .r is a divalent hydrocarbon group of a single bond or a C 1-20 is an integer of 0 ⁇ 2, m Is an integer from 0 to 20. s is an integer from 0 to 3.
- Examples of the compound represented by the general formula (IV) include hexachlorodisilane, bis (trichlorosilyl) methane, 1,2-bis (trichlorosilyl) ethane, 1,3-bis (trichlorosilyl) propane, 1,4 -Silicon halide compounds such as bis (trichlorosilyl) butane, 1,5-bis (trichlorosilyl) pentane, 1,6-bis (trichlorosilyl) hexane; hexamethoxydisilane, hexaethoxydisilane, bis (trimethoxysilyl) Methane, bis (triethoxysilyl) methane, bis (trimethoxysilyl) ethane, bis (triethoxysilyl) ethane, bis (trimethoxysilyl) propane, bis (triethoxysilyl) propane, bis (trimethoxysilyl) butane,
- the polyorganosiloxane compound compounds represented by the following general formulas (I) to (III) are preferable. That is, the compound having a functional group capable of reacting with the active terminal of the active conjugated diene polymer chain may contain at least one selected from these polyorganosiloxane compounds, and a plurality of types may be combined. Moreover, you may combine these polyorganosiloxane compounds and the other compound which has a functional group which can react with an active terminal, for example, the compound represented by Formula (IV) mentioned above.
- R 1 to R 8 are an alkyl group having 1 to 6 carbon atoms or an aryl group having 6 to 12 carbon atoms, and these may be the same or different from each other.
- X 1 and X 4 is an aryl group of the active conjugated diene polymer chain groups having a functional group capable of reacting with the active terminal of an alkyl group or having 6 to 12 carbon atoms having 1 to 6 carbon atoms, X 1 and X 4 may be the same as or different from each other,
- X 2 is a group having a functional group that reacts with the active end of the active conjugated diene polymer chain,
- X 3 is a group of 2 to 20 alkylene glycols A group containing repeating units, and a part of X 3 may be a group derived from a group containing repeating units of 2 to 20 alkylene glycol, m is an integer of 3 to 200, and n is 0 to 200 is an integer, and k is
- R 9 to R 16 are an alkyl group having 1 to 6 carbon atoms or an aryl group having 6 to 12 carbon atoms, and these may be the same or different from each other.
- X 5 to X 8 are groups having a functional group that reacts with the active terminal of the active conjugated diene polymer chain.
- R 17 to R 19 are an alkyl group having 1 to 6 carbon atoms or an aryl group having 6 to 12 carbon atoms, and these may be the same or different from each other.
- 9 to X 11 are groups having a functional group that reacts with the active end of the active conjugated diene polymer chain, and s is an integer of 1 to 18.
- examples of the alkyl group having 1 to 6 carbon atoms constituting R 1 to R 8 , X 1 and X 4 include, for example, methyl group, ethyl group, n- Examples include propyl group, isopropyl group, butyl group, pentyl group, hexyl group, cyclohexyl group and the like.
- examples of the aryl group having 6 to 12 carbon atoms include a phenyl group and a methylphenyl group. Among these alkyl groups and aryl groups, a methyl group is particularly preferable.
- the group having a functional group that reacts with the active terminal of the polymer chain constituting X 1 , X 2 and X 4 includes an alkoxyl group having 1 to 5 carbon atoms, 2- A hydrocarbon group containing a pyrrolidonyl group and a group having 4 to 12 carbon atoms containing an epoxy group are preferred.
- Examples of the alkoxyl group having 1 to 5 carbon atoms constituting X 1 , X 2 and X 4 include a methoxy group, an ethoxy group, a propoxy group, an isopropoxy group, and a butoxy group. Of these, a methoxy group is preferable.
- X 1 , X 2 and X 4 are alkoxyl group having 1 to 5 carbon atoms
- a polyorganosiloxane having an alkoxyl group at the active end of the active conjugated diene polymer chain is reacted, a silicon atom and an alkoxyl
- the bond with the oxygen atom of the group is cleaved, and the active conjugated diene polymer chain is directly bonded to the silicon atom to form a single bond.
- Preferred examples of the hydrocarbon group containing a 2-pyrrolidonyl group constituting X 1 , X 2 and X 4 include groups represented by the following general formula (V).
- V is an integer of 2 to 10.
- j is preferably 2.
- polyorganosiloxane containing a hydrocarbon group in which at least one of X 1 , X 2 and X 4 contains a 2-pyrrolidonyl group is reacted with the active end of the active conjugated diene polymer chain, 2-pyrrolidonyl
- the carbon-oxygen bond of the carbonyl group constituting the group is cleaved to form a structure in which the polymer chain is bonded to the carbon atom.
- Preferred examples of the group having 4 to 12 carbon atoms and having an epoxy group constituting X 1 , X 2 and X 4 include groups represented by the following general formula (VI).
- Z is an alkylene group or alkylarylene group having 1 to 10 carbon atoms
- Y is a methylene group, sulfur atom or oxygen atom
- E is a carbon atom having 2 to 10 carbon atoms having an epoxy group. It is a hydrogen group.
- Y is preferably an oxygen atom, more preferably Y is an oxygen atom and E is a glycidyl group
- Z is an alkylene group having 3 carbon atoms
- Y is an oxygen atom
- E is a glycidyl group.
- the activity of the active conjugated diene polymer chain when a polyorganosiloxane is reacted at the terminal, the carbon-oxygen bond constituting the epoxy ring is cleaved to form a structure in which a polymer chain is bonded to the carbon atom.
- X 1 and X 4 among the above, a group having 4 to 12 carbon atoms or an alkyl group having 1 to 6 carbon atoms containing an epoxy group is preferable, X 2 is preferably a group having 4 to 12 carbon atoms containing an epoxy group.
- X 3 is a group containing 2 to 20 alkylene glycol repeating units.
- the group containing 2 to 20 alkylene glycol repeating units is preferably a group represented by the following general formula (VII).
- t is an integer of 2 to 20
- R 1 is an alkylene group or alkylarylene group having 2 to 10 carbon atoms
- R 3 is a hydrogen atom or a methyl group
- R 2 is a carbon number 1 to 10 alkoxyl groups or aryloxy groups.
- t is an integer of 2 to 8
- R 1 is an alkylene group having 3 carbon atoms
- R 3 is a hydrogen atom
- R 2 is a methoxy group.
- R 9 to R 16 are alkyl groups having 1 to 6 carbon atoms or aryl groups having 6 to 12 carbon atoms, and these may be the same or different from each other. You may do it.
- X 5 to X 8 are groups having a functional group that reacts with the active end of the polymer chain.
- R 17 to R 19 are alkyl groups having 1 to 6 carbon atoms or aryl groups having 6 to 12 carbon atoms, and these may be the same or different from each other. You may do it.
- X 9 to X 11 are groups having a functional group that reacts with the active end of the polymer chain. s is an integer of 1 to 18.
- polyorganosiloxane represented by the general formula (II) and the general formula (III) it reacts with an alkyl group having 1 to 6 carbon atoms, an aryl group having 6 to 12 carbon atoms, and an active end of a polymer chain.
- the group having a functional group is the same as that described for the polyorganosiloxane of the general formula (I).
- generated by the said reaction has a functional group which has an interaction with a silica.
- the functional group having an interaction with silica may be a functional group included in the structure of the compound described above.
- the functional group which could be produced by reaction with the said compound and active terminal may be sufficient.
- the functional group having an interaction with silica is not particularly limited. For example, alkoxysilyl group, hydroxyl group (including organosiloxane structure), aldehyde group, carboxyl group, amino group, imino group, epoxy group Amide, thiol group, ether group and the like. Of these, a hydroxyl group (including an organosiloxane structure) is preferred.
- affinity with a silica can be made higher and a dispersibility can be improved significantly.
- the concentration of the terminal modified group in the modified conjugated diene polymer rubber is determined in relation to the weight average molecular weight (Mw) of the modified conjugated diene polymer rubber.
- the weight average molecular weight of the modified conjugated diene polymer rubber is 600,000 to 1,000,000, preferably 650,000 to 850,000.
- the modified group concentration at the end of the modified conjugated diene polymer rubber is increased, and the dispersibility of silica in the rubber composition is improved. Since the molecular weight of the polymer itself is low, the effect of improving the strength and rigidity cannot be sufficiently obtained, and the improvement range of the viscoelastic property may be reduced.
- the weight average molecular weight of the modified conjugated diene polymer rubber exceeds 1,000,000, the modified group concentration at the end of the modified conjugated diene polymer rubber will be low, the affinity with silica will be insufficient, and the dispersibility will deteriorate. The effect of reducing the resistance is insufficient, or the wet performance is insufficient. At the same time, the rigidity and strength of the rubber composition are lowered.
- the weight average molecular weight (Mw) of the modified conjugated diene polymer rubber is measured by gel permeation chromatography (GPC) in terms of standard polystyrene.
- the modified conjugated diene polymer rubber used in the present invention has an aromatic vinyl unit content of 38 to 48% by weight, preferably 40 to 45% by weight.
- aromatic vinyl unit content of the modified conjugated diene polymer rubber within such a range, the rigidity and strength of the rubber composition are increased to improve the wet performance when a pneumatic tire is obtained. Can do.
- the modified conjugated diene polymer rubber forms a fine phase separation form with respect to the other diene rubber.
- the modified conjugated diene polymer rubber is localized near the silica particles, and the affinity of the terminal modified group is increased due to the effective action of the terminal modified group on the silica, thereby dispersing the silica.
- Property can be improved.
- the aromatic vinyl unit content of the modified conjugated diene polymer rubber is less than 38% by weight, the effect of forming a fine phase separation form with respect to other diene rubbers cannot be sufficiently obtained. Further, the effect of increasing the rigidity and strength of the rubber composition cannot be sufficiently obtained.
- the aromatic vinyl unit content of the modified conjugated diene polymer rubber exceeds 48% by weight, the glass transition temperature (Tg) of the conjugated diene polymer rubber rises, the balance of viscoelastic properties becomes worse, and heat is generated. It becomes difficult to obtain the effect of reducing the property.
- Tg glass transition temperature
- the aromatic vinyl unit content of the modified conjugated diene polymer rubber is measured by infrared spectroscopic analysis (Hampton method).
- the vinyl unit content of the modified conjugated diene polymer rubber is 20 to 35%, preferably 26 to 34%.
- the glass transition temperature (Tg) of the modified conjugated diene polymer rubber can be optimized.
- the fine phase-separation form of the modified conjugated diene polymer rubber formed with respect to other diene rubber can be stabilized. If the vinyl unit content of the modified conjugated diene polymer rubber is less than 20%, the Tg of the modified conjugated diene polymer rubber becomes low, and the loss tangent of the dynamic viscoelastic property at 0 ° C., which is an index of wet performance.
- the glass transition temperature (Tg) of the modified conjugated diene polymer rubber is ⁇ 22 to ⁇ 32 ° C.
- Tg glass transition temperature
- the Tg of the modified conjugated diene polymer rubber is lower than ⁇ 32 ° C.
- the Tg of the modified conjugated diene polymer rubber decreases, and the loss tangent of the dynamic viscoelastic property at 0 ° C., which is an index of grip on a wet road. (Tan ⁇ ) decreases.
- the Tg of the modified conjugated diene polymer rubber is measured by a differential scanning calorimetry (DSC) under a temperature increase rate condition of 20 ° C./min, and is set as the temperature at the midpoint of the transition region.
- DSC differential scanning calorimetry
- the glass transition temperature of the modified conjugated diene polymer rubber in a state not containing an oil-extended component (oil) is used.
- the modified conjugated diene polymer rubber can improve the molding processability of the rubber composition by oil-extended.
- the amount of oil extended is not particularly limited, but is preferably 25 parts by weight or less with respect to 100 parts by weight of the modified conjugated diene polymer rubber.
- the oil extended amount of the modified conjugated diene polymer rubber exceeds 25 parts by weight, the degree of freedom in composition design is reduced when an oil, a softener, a tackifier or the like is added to the rubber composition.
- the content of the modified conjugated diene polymer rubber is 30% by weight or more, preferably 40 to 90% by weight in 100% by weight of the diene rubber.
- the content of the modified conjugated diene polymer rubber is less than 30% by weight in the diene rubber, the affinity with silica is deteriorated and the dispersibility of silica cannot be improved.
- a diene rubber other than the modified conjugated diene polymer rubber can be blended as a rubber component.
- Other diene rubbers include, for example, natural rubber, isoprene rubber, butadiene rubber, solution polymerized styrene butadiene rubber (S-SBR), emulsion polymerized styrene butadiene rubber (E-SBR), butyl rubber, and halogenated butyl rubber. Etc. can be illustrated. Natural rubber, isoprene rubber, butadiene rubber, and emulsion-polymerized styrene butadiene rubber are preferred. Such diene rubbers can be used alone or as a plurality of blends. The content of the other diene rubber is 70% by weight or less, preferably 10 to 60% by weight, based on 100% by weight of the diene rubber.
- the rubber composition for a tire tread of the present invention can further improve wet performance, particularly steering stability on a wet road surface, while maintaining low rolling resistance by blending a tackifying resin.
- a tackifying resin a resin having a glass transition temperature (Tg) 50 to 110 ° C. higher than the Tg of the modified conjugated diene polymer rubber described above is used.
- Tg glass transition temperature
- tan ⁇ at 0 ° C. is increased and wet grip performance can be improved.
- Tg of the tackifying resin shall be measured by the same method as Tg of the modified conjugated diene polymer rubber described above.
- the softening point of the tackifying resin is not particularly limited, but is preferably 130 to 170 ° C, more preferably 140 to 165 ° C.
- the softening point of the tackifying resin is less than 130 ° C., the effect of improving the wet performance cannot be sufficiently obtained.
- the softening point of tackifying resin exceeds 170 degreeC, the dispersibility with respect to diene rubber will deteriorate, the grip performance on wet road surface will fall, and rubber strength will fall.
- the softening point of the tackifying resin is measured according to JIS K6220-1 (ring and ball method).
- the compounding amount of the tackifying resin is preferably 1 to 25 parts by weight, more preferably 1 to 20 parts by weight with respect to 100 parts by weight of the diene rubber. If the compounding amount of the tackifying resin is less than 1 part by weight, the effect of improving the wet grip performance cannot be obtained sufficiently. When the compounding amount of the tackifying resin exceeds 25 parts by weight, the low rolling resistance is deteriorated. Moreover, the adhesiveness of the rubber composition is increased, and the molding processability and handleability are deteriorated, for example, the rubber composition is in close contact with the molding roll.
- the type of tackifying resin is not particularly limited.
- natural resins such as terpene resins and rosin resins, synthetic resins such as petroleum resins, coal resins, phenol resins, and xylene resins. And their modified products.
- terpene resins and / or petroleum resins are preferable, and modified products of terpene resins are particularly preferable.
- terpene resin for example, ⁇ -pinene resin, ⁇ -pinene resin, limonene resin, hydrogenated limonene resin, dipentene resin, terpene phenol resin, terpene styrene resin, aromatic modified terpene resin, hydrogenated terpene resin and the like are suitable.
- aromatic modified terpene resins are preferred, for example, aromatics obtained by polymerizing terpenes such as ⁇ -pinene, ⁇ -pinene, dipentene, and limonene with aromatic compounds such as styrene, phenol, ⁇ -methylstyrene, and vinyltoluene. Examples thereof include modified terpene resins.
- aromatic hydrocarbon resin or a saturated or unsaturated aliphatic hydrocarbon resins.
- C 5 petroleum resin isoprene, 1,3-pentadiene, cyclopentadiene, methylbutene, such as pentene aliphatic petroleum resins obtained by polymerizing fraction
- C 9 petroleum resins alpha-methyl styrene, o- vinyltoluene, m- vinyltoluene, p- vinyl polymerized aromatic petroleum resin fractions such as toluene
- C 5 C 9 copolymer petroleum resin isoprene, 1,3-pentadiene, cyclopentadiene, methylbutene, such as pentene aliphatic petroleum resins obtained by polymerizing fraction
- C 9 petroleum resins alpha-methyl styrene, o- vinyltoluene, m- vinyltoluene, p- vinyl polymerized aromatic petroleum resin fractions such as toluene
- a filler containing 50% by weight or more of silica is blended in an amount of 25 to 80 parts by weight, preferably 20 to 75 parts by weight, based on 100 parts by weight of the diene rubber.
- the content of silica in 100% by weight of the filler is 50% by weight or more, preferably 70 to 100% by weight.
- the low rolling resistance and wet performance of the rubber composition can be balanced at a higher level.
- the compounding of the modified conjugated diene polymer rubber increases the affinity with silica and improves the dispersibility, so that the effect of silica compounding is further improved.
- silica usually used in rubber compositions for tire treads, for example, wet method silica, dry method silica, or surface-treated silica can be used.
- the particle property of silica is preferably such that the nitrogen adsorption specific surface area (N 2 SA) is 194 to 225 m 2 / g.
- the N 2 SA of silica is determined according to JIS K6217-2.
- silica with a high specific surface area has a strong interaction between the particle surfaces and a poor affinity with the diene rubber. Therefore, it is difficult to improve the dispersibility when simply blended with the diene rubber, such as tan ⁇ . The effect of modifying the dynamic viscoelastic properties was not sufficiently obtained. Further, even when blended with a conventional terminal-modified styrene-butadiene rubber, the dispersibility of silica having a high specific surface area has not necessarily been sufficiently improved.
- silica dispersibility can be improved by blending silica having a high specific surface area with the above-described modified conjugated diene polymer rubber.
- the modified conjugated diene polymer rubber and the high specific surface area silica both modify the tan ⁇ of the rubber composition and can obtain a further synergistic effect.
- Silica can be used by appropriately selecting from commercially available products. Moreover, the silica obtained by the normal manufacturing method can be used.
- the rubber composition of the present invention it is preferable to blend a silane coupling agent together with silica, so that the dispersibility of silica can be improved and the reinforcing property with the diene rubber can be further increased.
- the silane coupling agent is preferably added in an amount of 3 to 20% by weight, more preferably 5 to 15% by weight, based on the amount of silica.
- the compounding amount of the silane coupling agent is less than 3% by weight of the silica weight, the effect of improving the dispersibility of the silica cannot be sufficiently obtained.
- the silane coupling agent exceeds 20% by weight, the silane coupling agents are polymerized with each other, and a desired effect cannot be obtained.
- the silane coupling agent is not particularly limited, but a sulfur-containing silane coupling agent is preferable.
- a sulfur-containing silane coupling agent is preferable.
- the rubber composition for a tire tread of the present invention can contain other fillers other than silica.
- fillers other than silica include carbon black, clay, mica, talc, calcium carbonate, aluminum hydroxide, aluminum oxide, and titanium oxide. Of these, carbon black is preferred.
- the rubber strength can be increased by blending other fillers containing carbon black.
- the content of the other filler is 50% by weight or less, preferably 0 to 20% by weight, out of 100% by weight of the filler. When the content of other fillers exceeds 50% by weight, rolling resistance is deteriorated.
- the tire tread rubber composition generally includes a vulcanization or crosslinking agent, a vulcanization accelerator, an anti-aging agent, a plasticizer, a processing aid, a liquid polymer, a thermosetting resin, and the like.
- Various compounding agents used can be blended.
- Such a compounding agent can be kneaded by a general method to form a rubber composition, which can be used for vulcanization or crosslinking.
- the compounding amounts of these compounding agents can be the conventional general compounding amounts as long as they do not contradict the purpose of the present invention.
- the rubber composition for a tire tread can be produced by mixing each of the above components using a known rubber kneading machine such as a Banbury mixer, a kneader, or a roll.
- the rubber composition for a tire tread of the present invention can be suitably used for a pneumatic tire.
- a pneumatic tire using this rubber composition in the tread portion can improve low rolling resistance and wet performance to a level higher than that of the conventional level.
- the obtained 24 types of rubber compositions for tire treads were press vulcanized at 160 ° C. for 20 minutes in a mold having a predetermined shape to produce a vulcanized rubber sample. tan ⁇ ) was measured.
- pneumatic tires having a tire structure having the structure shown in FIG. 1 and a tire size of 225 / 50R17 were manufactured by using the above-described 24 kinds of tire tread rubber compositions in the tread portion.
- the steering stability and braking performance on wet road surfaces of the obtained 24 types of pneumatic tires were evaluated by the following methods.
- the obtained pneumatic tire is assembled to a wheel with a rim size of 7 ⁇ J and mounted on a domestic 2.5 liter class test vehicle.
- the test course was run on a real vehicle, and the handling stability at that time was scored by a sensitive evaluation by three specialized panelists.
- the obtained results are shown in Tables 1 to 3 with the index of Comparative Example 1 as 100. The larger this index, the better the wet handling stability on the dry road surface.
- the obtained pneumatic tire is assembled to a wheel with a rim size of 7 ⁇ J, mounted on a domestic 2.5 liter class test vehicle, and has a 2.6 km circumference with a wet road surface under the condition of air pressure of 230 kPa.
- the test course was run on a real vehicle, and the braking performance at that time was scored by sensitivity evaluation by three specialized panelists.
- the obtained results are shown in Tables 1 to 3 with the index of Comparative Example 1 as 100. The larger this index, the better the wet braking performance on the dry road surface.
- -Modified S-SBR1 modified conjugated diene polymer rubber, aromatic vinyl unit content 42% by weight, vinyl unit content 32%, weight average molecular weight (Mw) 750,000, Tg -25 ° C, rubber An oil-extended product containing 25 parts by weight of oil with respect to 100 parts by weight of the component, and a terminal-modified solution-polymerized styrene butadiene rubber prepared by the following production method.
- a small amount of an anti-aging agent (Irganox 1520, manufactured by BASF) is added to the obtained polymer solution, and 25 parts of Fukkoreramic 30 (manufactured by Shin Nippon Oil Co., Ltd.) is added as an extension oil, followed by steam stripping.
- the solid rubber was recovered.
- the obtained solid rubber was dehydrated with a roll and dried in a drier to obtain modified S-SBR1.
- -Modified S-SBR2 terminal modified solution polymerized styrene butadiene rubber, aromatic vinyl unit content 20% by weight, vinyl unit content 67%, weight average molecular weight (Mw) 510,000, Tg -25 ° C, Japan Nipol NS616 manufactured by Zeon, non-oil-extended and modified S-SBR3: terminal-modified solution-polymerized styrene butadiene rubber, aromatic vinyl unit content 35% by weight, vinyl unit content 48%, weight average molecular weight (Mw) 45 Tg is ⁇ 30 ° C., SE0372 manufactured by Sumitomo Chemical Co., Ltd., oil-extended product containing 20 parts by weight of oil to 100 parts by weight of rubber component, modified S-SBR4: terminal-modified solution-polymerized styrene butadiene rubber, aromatic vinyl unit content 30% by weight, vinyl unit content 61%, weight average molecular weight (Mw) 430,000, Tg -27 ° C, N207
- Modified S-SBR6 Modified conjugated diene polymer rubber comprising polyorganosiloxane having the structure of the general formula (II), aromatic vinyl unit content 42% by weight, vinyl unit content 32%, weight average An oil-extended product having a molecular weight (Mw) of 750,000, Tg of ⁇ 25 ° C., 100 parts by weight of a rubber component and 25 parts by weight of oil, and a terminal-modified solution-polymerized styrene butadiene rubber prepared by the following production method.
- Mw molecular weight
- Modified S-SBR7 Modified conjugated diene polymer rubber made of polyorganosiloxane having the structure of the general formula (III), aromatic vinyl unit content 41% by weight, vinyl unit content 32%, weight average An oil-extended product having a molecular weight (Mw) of 750,000, Tg of ⁇ 25 ° C., 100 parts by weight of a rubber component and 25 parts by weight of oil, and a terminal-modified solution-polymerized styrene butadiene rubber prepared by the following production method.
- Mw molecular weight
- a small amount of an anti-aging agent (Irganox 1520, manufactured by BASF) is added to the obtained polymer solution, and 25 parts of FUKKOR ERAMIC 30 (manufactured by Shin Nippon Oil Co., Ltd.) is added as an extension oil, followed by steam stripping.
- the solid rubber was recovered.
- the obtained solid rubber was dehydrated with a roll and dried in a drier to obtain modified S-SBR7.
- Modified S-SBR8 Modified conjugated diene polymer rubber composed of polyorganosiloxane having the structure of the above general formula (I), aromatic vinyl unit content 34% by weight, vinyl unit content 34%, weight average An oil-extended product having a molecular weight (Mw) of 760,000, Tg of ⁇ 33 ° C., 25 parts by weight of oil per 100 parts by weight of the rubber component, and a terminal-modified solution-polymerized styrene butadiene rubber prepared by the following production method.
- Mw molecular weight
- a small amount of an anti-aging agent (Irganox 1520, manufactured by BASF) is added to the obtained polymer solution, and 25 parts of FUKKOR ERAMIC 30 (manufactured by Shin Nippon Oil Co., Ltd.) is added as an extension oil, followed by steam stripping.
- the solid rubber was recovered.
- the obtained solid rubber was dehydrated with a roll and dried in a drier to obtain modified S-SBR8.
- Modified S-SBR9 Modified conjugated diene polymer rubber composed of polyorganosiloxane having the structure of the general formula (I), aromatic vinyl unit content 49% by weight, vinyl unit content 28%, weight average An oil-extended product having a molecular weight (Mw) of 710,000, Tg of ⁇ 17 ° C., 100 parts by weight of a rubber component and 25 parts by weight of oil, and a terminal-modified solution-polymerized styrene butadiene rubber prepared by the following production method.
- Mw molecular weight
- a small amount of an anti-aging agent (Irganox 1520, manufactured by BASF) is added to the obtained polymer solution, and 25 parts of FUKKOR ERAMIC 30 (manufactured by Shin Nippon Oil Co., Ltd.) is added as an extension oil, followed by steam stripping.
- the solid rubber was recovered.
- the obtained solid rubber was dehydrated with a roll and dried in a drier to obtain modified S-SBR9.
- Modified S-SBR10 Modified conjugated diene polymer rubber composed of polyorganosiloxane having the structure of the above general formula (I), aromatic vinyl unit content 41% by weight, vinyl unit content 17%, weight average An oil-extended product having a molecular weight (Mw) of 740,000, Tg of ⁇ 37 ° C., 25 parts by weight of oil per 100 parts by weight of a rubber component, and a terminal-modified solution-polymerized styrene butadiene rubber prepared by the following production method.
- Mw molecular weight
- a small amount of an anti-aging agent (Irganox 1520, manufactured by BASF) is added to the obtained polymer solution, and 25 parts of FUKKOR ERAMIC 30 (manufactured by Shin Nippon Oil Co., Ltd.) is added as an extension oil, followed by steam stripping.
- the solid rubber was recovered.
- the obtained solid rubber was dehydrated with a roll and dried in a drier to obtain modified S-SBR10.
- Modified S-SBR11 Modified conjugated diene polymer rubber composed of polyorganosiloxane having the structure of the above general formula (I), aromatic vinyl unit content 39% by weight, vinyl unit content 40%, weight average An oil-extended product having a molecular weight (Mw) of 750,000, Tg of -21 ° C., 100 parts by weight of a rubber component and 25 parts by weight of oil, and a terminal-modified solution-polymerized styrene butadiene rubber prepared by the following production method.
- Mw molecular weight
- a small amount of an anti-aging agent (Irganox 1520, manufactured by BASF) is added to the obtained polymer solution, and 25 parts of FUKKOR ERAMIC 30 (manufactured by Shin Nippon Oil Co., Ltd.) is added as an extension oil, followed by steam stripping.
- the solid rubber was recovered.
- the obtained solid rubber was dehydrated with a roll and dried in a drier to obtain modified S-SBR11.
- S-SBR unmodified solution-polymerized styrene butadiene rubber, aromatic vinyl unit content 41% by weight, vinyl unit content 25%, weight average molecular weight (Mw) 1,010,000, Tg -30 ° C, Dow Chemical SLR6430, oil-extended product containing 37.5 parts by weight of oil with respect to 100 parts by weight of rubber component
- E-SBR emulsion-polymerized styrene butadiene rubber, aromatic vinyl unit content 25% by weight, vinyl unit content 15% by weight, weight average molecular weight (Mw) of 600,000, Tg of ⁇ 52 ° C., Nipol 1723 manufactured by Zeon Corporation, and oil-extended product containing 37.5 parts by weight of oil with respect to 100 parts by weight of rubber component: Sildia: Rhodia Ltd.
- Tackifying resin 3 aromatic modified terpene resin having a Tg of 77 ° C., YS resin TO-125 manufactured by Yashara Chemical Co., Ltd.
- Tackifying resin 4 Pg-modified terpene resin having a Tg of 87 ° C., YS Polystar T145 manufactured by Yashara Chemical Co., Ltd.
- Oil Extract No. 4 S manufactured by Showa Shell Sekiyu KK
- Zinc oxide 3 types of zinc oxide manufactured by Shodo Chemical Co., Ltd.
- Anti-aging agent Santoflex 6PPD manufactured by Flexis
- Wax Sunnock manufactured by Ouchi Shinsei Chemical Co., Ltd.
- Sulfur Fine powdered sulfur with Jinhua seal oil manufactured by Tsurumi Chemical Co., Ltd.
- Vulcanization accelerator 1 CBS vulcanization accelerator, Noxeller CZ-G manufactured by Ouchi New Chemical Co.
- Vulcanization accelerator 2 Vulcanization accelerator DPG, Noxeller D manufactured by Ouchi Shinsei Chemical Co., Ltd.
- the rubber composition of Comparative Example 4 has a poor rolling resistance because the Tg of the tackifying resin 4 is higher than the Tg of the modified S-SBR1 by more than 110 ° C.
- the rubber composition of Comparative Example 5 has a modified S-SBR3 having an aromatic vinyl unit content of less than 38% by weight, a vinyl unit content of more than 35% by weight, and a weight average molecular weight of less than 600,000. Cannot be reduced, and wet steering stability and wet braking performance cannot be improved.
- the aromatic vinyl unit content of the modified S-SBR4 is less than 38% by weight, the vinyl unit content is more than 35% by weight, and the weight average molecular weight is less than 600,000.
- the rubber composition of Comparative Example 11 cannot reduce rolling resistance because the silica content in the filler is less than 50% by weight, and also exhibits wet handling stability and wetness. The effect of improving braking performance cannot be obtained.
- the rubber composition of Comparative Example 12 since the blending amount of the filler including silica is less than 25 parts by weight, wet steering stability and wet braking performance are lowered.
- the blending amount of the filler including silica exceeds 80 parts by weight, so that the rolling resistance cannot be reduced, and the wet steering stability and the wet braking performance are not sufficiently improved. It is.
- the rubber composition of Comparative Example 14 has an aromatic vinyl unit content of the modified S-SBR7 of less than 38% by weight, the effect of improving wet handling stability and wet braking performance is less than that of Examples 1-7. It is enough.
- the aromatic vinyl unit content of the modified S-SBR9 is larger than 48% by weight, the glass transition temperature (Tg) of the conjugated diene polymer rubber is increased, and the rolling resistance is reduced. I can't.
- the rubber composition of Comparative Example 16 has a vinyl unit content of the modified S-SBR10 of less than 20% by weight, the effects of improving wet handling stability and wet braking performance are insufficient compared to Examples 1-7.
- the rolling resistance cannot be reduced because the vinyl unit content of the modified S-SBR11 exceeds 35% by weight.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Tires In General (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Other Resins Obtained By Reactions Not Involving Carbon-To-Carbon Unsaturated Bonds (AREA)
Abstract
Description
このようにX1,X2及びX4の少なくとも一つが2-ピロリドニル基を含有する炭化水素基を含むポリオルガノシロキサンを、活性共役ジエン系重合体鎖の活性末端に反応させると、2-ピロリドニル基を構成するカルボニル基の炭素-酸素結合が開裂して、その炭素原子に重合体鎖が結合した構造を形成する。
上記式(VI)中、Zは炭素数1~10のアルキレン基またはアルキルアリーレン基であり、Yはメチレン基、硫黄原子または酸素原子であり、Eはエポキシ基を有する炭素数2~10の炭化水素基である。これらの中でも、Yが酸素原子であるものが好ましく、Yが酸素原子かつEがグリシジル基であるものがより好ましく、Zが炭素数3のアルキレン基、Yが酸素原子かつEがグリシジル基であるものが特に好ましい。
得られた加硫ゴムサンプルの転がり抵抗を、転がり抵抗の指標であることが知られている損失正接tanδ(60℃)により評価した。tanδ(60℃)は、東洋精機製作所社製粘弾性スペクトロメーターを用いて、初期歪み10%、振幅±2%、周波数20Hz、温度60℃の条件下で測定した。得られた結果は比較例1を100とする指数として、表1~3に示した。この指数が小さいほどtanδ(60℃)が小さく低発熱であり、空気入りタイヤにしたとき転がり抵抗が小さく燃費性能が優れることを意味する。
得られた空気入りタイヤをリムサイズ7×Jのホイールに組付け、国産2.5リットルクラスの試験車両に装着し、空気圧230kPaの条件で湿潤路面からなる1周2.6kmのテストコースを実車走行させ、そのときの操縦安定性を専門パネラー3名による感応評価により採点した。得られた結果は比較例1を100とする指数として、表1~3に示した。この指数が大きいほど乾燥路面におけるウェット操縦安定性が優れていることを意味する。
得られた空気入りタイヤをリムサイズ7×Jのホイールに組付け、国産2.5リットルクラスの試験車両に装着し、空気圧230kPaの条件で湿潤路面からなる1周2.6kmのテストコースを実車走行させ、そのときの制動性能を専門パネラー3名による感応評価により採点した。得られた結果は比較例1を100とする指数として、表1~3に示した。この指数が大きいほど乾燥路面におけるウェット制動性能が優れていることを意味する。
窒素置換された内容量10Lのオートクレーブ反応器に、シクロヘキサン4533g、スチレン338.9g(3.254mol)、ブタジエン468.0g(8.652mol)、イソプレン20.0g(0.294mol)およびN,N,N′,N′-テトラメチルエチレンジアミン0.189mL(1.271mmol)を仕込み、攪拌を開始した。反応容器内の内容物の温度を50℃にした後、n-ブチルリチウム5.061mL(7.945mmol)を添加した。重合転化率がほぼ100%に到達した後、さらにイソプレン12.0gを添加して5分間反応させた後、1,6-ビス(トリクロロシリル)ヘキサンの40wt%トルエン溶液0.281g(0.318mmol)を添加し、30分間反応させた。さらに、下記に示すポリオルガノシロキサンAの40wt%キシレン溶液18.3g(0.318mmol)を添加し、30分間反応させた。メタノール0.5mLを添加して30分間攪拌した。得られたポリマー溶液に老化防止剤(イルガノックス1520、BASF社製)を少量添加し、伸展油としてフッコールエラミック30(新日本石油(株)製)を25部添加した後、スチームストリッピング法により固体状のゴムを回収した。得られた固体ゴムをロールにより脱水し、乾燥機中で乾燥を行い、変性S-SBR1を得た。
・変性S-SBR3:末端変性溶液重合スチレンブタジエンゴム、芳香族ビニル単位含有量が35重量%、ビニル単位含有量が48%、重量平均分子量(Mw)が45万、Tgが-30℃、住友化学社製SE0372、ゴム成分100重量部に対しオイル分20重量部を含む油展品
・変性S-SBR4:末端変性溶液重合スチレンブタジエンゴム、芳香族ビニル単位含有量が30重量%、ビニル単位含有量が61%、重量平均分子量(Mw)が43万、Tgが-27℃、旭化成社製N207、非油展品
・変性S-SBR5:末端変性溶液重合スチレンブタジエンゴム、芳香族ビニル単位含有量が42重量%、ビニル単位含有量が35%、重量平均分子量(Mw)が44万、Tgが-24℃、旭化成社製アサプレンE10、非油展品
〔変性S-SBR6の製造方法〕
窒素置換された内容量10Lのオートクレーブ反応器に、シクロヘキサン4550g、スチレン341.1g(3.275mol)、ブタジエン459.9g(8.502mol)、イソプレン20.0g(0.294mol)およびN,N,N′,N′―テトラメチルエチレンジアミン0.190mL(1.277mmol)を仕込み、攪拌を開始した。反応容器内の内容物の温度を50℃にした後、n-ブチルリチウム5.062mL(7.946mmol)を添加した。重合転化率がほぼ100%に到達した後、さらにイソプレン12.0gを添加して5分間反応させた後、1,6-ビス(トリクロロシリル)ヘキサンの40wt%トルエン溶液0.283g(0.320mmol)を添加し、30分間反応させた。さらに下記に示すポリオルガノシロキサンBの40wt%キシレン溶液19.0g(0.330mmol)を添加し、30分間反応させた。メタノール0.5mLを添加して30分間攪拌した。得られたポリマー溶液に老化防止剤(イルガノックス1520、BASF社製)を少量添加し、伸展油としてフッコールエラミック30(新日本石油(株)製)を25部添加した後、スチームストリッピング法により固体状のゴムを回収した。得られた固体ゴムをロールにより脱水し、乾燥機中で乾燥を行い、変性S-SBR6を得た。
ポリオルガノシロキサンB; 前記一般式(II)の構造を有するポリオルガノシロキサンであって、R9~R16がそれぞれメチル基(-CH3)、X5~X8がそれぞれ前記式(VIII)で表される炭化水素基であるポリオルガノシロキサン
窒素置換された内容量10Lのオートクレーブ反応器に、シクロヘキサン4542g、スチレン339.2g(3.257mol)、ブタジエン462.8g(8.556mol)、イソプレン20.0g(0.294mol)およびN,N,N′,N′―テトラメチルエチレンジアミン0.188mL(1.264mmol)を仕込み、攪拌を開始した。反応容器内の内容物の温度を50℃にした後、n-ブチルリチウム5.059mL(7.942mmol)を添加した。重合転化率がほぼ100%に到達した後、さらにイソプレン12.0gを添加して5分間反応させた後、1,6-ビス(トリクロロシリル)ヘキサンの40wt%トルエン溶液0.283g(0.320mmol)を添加し、30分間反応させた。さらに下記に示すポリオルガノシロキサンCの40wt%キシレン溶液19.2g(0.333mmol)を添加し、30分間反応させた。メタノール0.5mLを添加して30分間攪拌した。得られたポリマー溶液に老化防止剤(イルガノックス1520、BASF社製)を少量添加し、伸展油としてフッコールエラミック30(新日本石油(株)製)を25部添加した後、スチームストリッピング法により固体状のゴムを回収した。得られた固体ゴムをロールにより脱水し、乾燥機中で乾燥を行い、変性S-SBR7を得た。
ポリオルガノシロキサンC; 前記一般式(III)の構造を有するポリオルガノシロキサンであって、s=2、R17~R19がそれぞれメチル基(-CH3)、X9~X11がそれぞれ前記式(VIII)で表される炭化水素基であるポリオルガノシロキサン
窒素置換された内容量10Lのオートクレーブ反応器に、シクロヘキサン4541g、スチレン277.6g(2.665mol)、ブタジエン523.1g(9.671mol)、イソプレン20.0g(0.294mol)およびN,N,N′,N′―テトラメチルエチレンジアミン0.175mL(1.178mmol)を仕込み、攪拌を開始した。反応容器内の内容物の温度を50℃にした後、n-ブチルリチウム4.984mL(7.824mmol)を添加した。重合転化率がほぼ100%に到達した後、さらにイソプレン12.0gを添加して5分間反応させた後、1,6-ビス(トリクロロシリル)ヘキサンの40wt%トルエン溶液0.273g(0.327mmol)を添加し、30分間反応させた。さらに、上述したポリオルガノシロキサンAの40wt%キシレン溶液18.1g(0.314mmol)を添加し、30分間反応させた。メタノール0.5mLを添加して30分間攪拌した。得られたポリマー溶液に老化防止剤(イルガノックス1520、BASF社製)を少量添加し、伸展油としてフッコールエラミック30(新日本石油(株)製)を25部添加した後、スチームストリッピング法により固体状のゴムを回収した。得られた固体ゴムをロールにより脱水し、乾燥機中で乾燥を行い、変性S-SBR8を得た。
窒素置換された内容量10Lのオートクレーブ反応器に、シクロヘキサン4536g、スチレン401.0g(3.850mol)、ブタジエン392.0g(7.247mol)、イソプレン20.0g(0.294mol)およびN,N,N′,N′―テトラメチルエチレンジアミン0.201mL(1.352mmol)を仕込み、攪拌を開始した。反応容器内の内容物の温度を50℃にした後、n-ブチルリチウム5.141mL(8.071mmol)を添加した。重合転化率がほぼ100%に到達した後、さらにイソプレン12.0gを添加して5分間反応させた後、1,6-ビス(トリクロロシリル)ヘキサンの40wt%トルエン溶液0.279g(0.320mmol)を添加し、30分間反応させた。さらに、上述したポリオルガノシロキサンAの40wt%キシレン溶液18.6g(0.323mmol)を添加し、30分間反応させた。メタノール0.5mLを添加して30分間攪拌した。得られたポリマー溶液に老化防止剤(イルガノックス1520、BASF社製)を少量添加し、伸展油としてフッコールエラミック30(新日本石油(株)製)を25部添加した後、スチームストリッピング法により固体状のゴムを回収した。得られた固体ゴムをロールにより脱水し、乾燥機中で乾燥を行い、変性S-SBR9を得た。
窒素置換された内容量10Lのオートクレーブ反応器に、シクロヘキサン4542g、スチレン339.2g(3.257mol)、ブタジエン462.8g(8.556mol)、イソプレン20.0g(0.294mol)およびN,N,N′,N′―テトラメチルエチレンジアミン0.0376mL(0.253mmol)を仕込み、攪拌を開始した。反応容器内の内容物の温度を50℃にした後、n-ブチルリチウム5.059mL(7.942mmol)を添加した。重合転化率がほぼ100%に到達した後、さらにイソプレン12.0gを添加して5分間反応させた後、1,6-ビス(トリクロロシリル)ヘキサンの40wt%トルエン溶液0.280g(0.331mmol)を添加し、30分間反応させた。さらに、上述したポリオルガノシロキサンAの40wt%キシレン溶液18.8g(0.326mmol)を添加し、30分間反応させた。メタノール0.5mLを添加して30分間攪拌した。得られたポリマー溶液に老化防止剤(イルガノックス1520、BASF社製)を少量添加し、伸展油としてフッコールエラミック30(新日本石油(株)製)を25部添加した後、スチームストリッピング法により固体状のゴムを回収した。得られた固体ゴムをロールにより脱水し、乾燥機中で乾燥を行い、変性S-SBR10を得た。
窒素置換された内容量10Lのオートクレーブ反応器に、シクロヘキサン4543g、スチレン319.8g(3.071mol)、ブタジエン480.1g(8.876mol)、イソプレン20.0g(0.294mol)およびN,N,N′,N′―テトラメチルエチレンジアミン0.217mL(1.462mmol)を仕込み、攪拌を開始した。反応容器内の内容物の温度を50℃にした後、n-ブチルリチウム5.141mL(8.0714mmol)を添加した。重合転化率がほぼ100%に到達した後、さらにイソプレン12.0gを添加して5分間反応させた後、1,6-ビス(トリクロロシリル)ヘキサンの40wt%トルエン溶液0.279g(0.320mmol)を添加し、30分間反応させた。さらに、上述したポリオルガノシロキサンAの40wt%キシレン溶液18.6g(0.323mmol)を添加し、30分間反応させた。メタノール0.5mLを添加して30分間攪拌した。得られたポリマー溶液に老化防止剤(イルガノックス1520、BASF社製)を少量添加し、伸展油としてフッコールエラミック30(新日本石油(株)製)を25部添加した後、スチームストリッピング法により固体状のゴムを回収した。得られた固体ゴムをロールにより脱水し、乾燥機中で乾燥を行い、変性S-SBR11を得た。
・E-SBR:乳化重合スチレンブタジエンゴム、芳香族ビニル単位含有量が25重量%、ビニル単位含有量が15重量%、重量平均分子量(Mw)が60万、Tgが-52℃、日本ゼオン社製Nipol 1723、ゴム成分100重量部に対しオイル分37.5重量部を含む油展品
・シリカ:ローディア社製Zeosil 1165MP、DBP吸収量が200ml/100g、窒素吸着比表面積(N2SA)が160m2/g、CTAB比表面積(CTAB)が159m2/g
・CB:カーボンブラック、東海カーボン社製シーストKH
・カップリング剤:エボニックデグサ社製Si69
・粘着性付与樹脂1:Tgが31℃の芳香族変性テルペン樹脂、ヤスハラケミカル社製YSレジンTO-85
・粘着性付与樹脂2:Tgが53℃の芳香族変性テルペン樹脂、ヤスハラケミカル社製YSレジンTO-105
・粘着性付与樹脂3:Tgが77℃の芳香族変性テルペン樹脂、ヤスハラケミカル社製YSレジンTO-125
・粘着性付与樹脂4:Tgが87℃のフェノール変性テルペン樹脂、ヤスハラケミカル社製YSポリスターT145
・オイル:昭和シェル石油社製エキストラクト4号S
・酸化亜鉛:正同化学工業社製酸化亜鉛3種
・ステアリン酸:日油社製ビーズステアリン酸YR
・老化防止剤:フレキシス社製サントフレックス6PPD
・ワックス:大内新興化学工業社製サンノック
・硫黄:鶴見化学工業社製金華印油入微粉硫黄
・加硫促進剤1:加硫促進剤CBS、大内新興化学工業社製ノクセラーCZ-G
・加硫促進剤2:加硫促進剤DPG、大内新興化学工業社製ノクセラーD
12 トレッドゴム層
Claims (3)
- 変性共役ジエン系重合体ゴムを30重量%以上含むジエン系ゴム100重量部に対し、粘着性付与樹脂を1~25重量部、充填剤を25~80重量部配合すると共に、前記充填剤がシリカを50重量%以上含み、かつ前記変性共役ジエン系重合体ゴムが、炭化水素溶媒中、有機活性金属化合物を開始剤として用いて共役ジエン系単量体と芳香族ビニル単量体とを共重合させた活性共役ジエン系重合体鎖に、その重合体鎖の活性末端と反応可能な官能基を有する少なくとも1種類の化合物を反応させた末端変性基を有し、該末端変性基がシリカとの相互作用を有する官能基を含むと共に、この変性共役ジエン系重合体ゴムの芳香族ビニル単位含有量が38~48重量%、ビニル単位含有量が20~35%、重量平均分子量が60万~100万、ガラス転移温度が-22~-32℃であり、前記粘着性付与樹脂のガラス転移温度が、前記変性共役ジエン系重合体ゴムのガラス転移温度よりも50~110℃高いことを特徴とするタイヤトレッド用ゴム組成物。
- 前記活性共役ジエン系重合体鎖の活性末端と反応可能な官能基を有する化合物が、下記一般式(I)~(III)から選ばれる少なくとも1種類のポリオルガノシロキサン化合物を含むことを特徴とする請求項1記載のタイヤトレッド用ゴム組成物。
- 請求項1又は2に記載のタイヤトレッド用ゴム組成物を使用した空気入りタイヤ。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/991,414 US10072138B2 (en) | 2010-12-03 | 2011-11-25 | Rubber composition for use in tire treads |
JP2012521893A JP5240409B2 (ja) | 2010-12-03 | 2011-11-25 | タイヤトレッド用ゴム組成物 |
CN201180058131.XA CN103237842B (zh) | 2010-12-03 | 2011-11-25 | 轮胎胎面用橡胶组合物 |
DE112011104011.3T DE112011104011B9 (de) | 2010-12-03 | 2011-11-25 | Verwendung einer Kautschukzusammensetzung zur Herstellung eines Luftreifens und diese umfassender Luftreifen |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010-270813 | 2010-12-03 | ||
JP2010270813 | 2010-12-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012073838A1 true WO2012073838A1 (ja) | 2012-06-07 |
Family
ID=46171773
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2011/077252 WO2012073838A1 (ja) | 2010-12-03 | 2011-11-25 | タイヤトレッド用ゴム組成物 |
Country Status (5)
Country | Link |
---|---|
US (1) | US10072138B2 (ja) |
JP (1) | JP5240409B2 (ja) |
CN (1) | CN103237842B (ja) |
DE (1) | DE112011104011B9 (ja) |
WO (1) | WO2012073838A1 (ja) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013122237A1 (ja) * | 2012-02-15 | 2013-08-22 | 横浜ゴム株式会社 | タイヤトレッド用ゴム組成物 |
JP2014047295A (ja) * | 2012-08-31 | 2014-03-17 | Yokohama Rubber Co Ltd:The | タイヤトレッド用ゴム組成物 |
JP2014148590A (ja) * | 2013-01-31 | 2014-08-21 | Nippon Zeon Co Ltd | ゴム組成物 |
JP2014231550A (ja) * | 2013-05-28 | 2014-12-11 | 横浜ゴム株式会社 | タイヤ用ゴム組成物および空気入りタイヤ |
JP2016008284A (ja) * | 2014-06-26 | 2016-01-18 | 横浜ゴム株式会社 | タイヤ用ゴム組成物 |
JP5846333B2 (ja) * | 2013-02-25 | 2016-01-20 | 横浜ゴム株式会社 | タイヤトレッド用ゴム組成物および空気入りタイヤ |
WO2016076424A1 (ja) * | 2014-11-14 | 2016-05-19 | 住友ゴム工業株式会社 | 加硫ゴム組成物の製造方法、加硫ゴム組成物およびそれを用いたスタッドレスタイヤ |
JP2018028018A (ja) * | 2016-08-17 | 2018-02-22 | 旭化成株式会社 | 変性共役ジエン系重合体組成物、トレッド用ゴム組成物、及びタイヤ |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5447667B2 (ja) * | 2010-12-03 | 2014-03-19 | 横浜ゴム株式会社 | タイヤトレッド用ゴム組成物 |
DE112011104012B9 (de) * | 2010-12-03 | 2017-08-03 | The Yokohama Rubber Co., Ltd. | Kautschukzusammensetzung zur Verwendung in Reifenlaufflächen, vulkanisiertes Produkt davon und dessen Verwendung in einer Reifenlauffläche eines Luftreifens |
JP5429255B2 (ja) * | 2011-09-30 | 2014-02-26 | 横浜ゴム株式会社 | タイヤトレッド用ゴム組成物及びこれを用いる空気入りタイヤ |
JP6597627B2 (ja) * | 2014-10-17 | 2019-10-30 | 日本ゼオン株式会社 | タイヤ用ゴム組成物 |
JP5999167B2 (ja) * | 2014-12-05 | 2016-09-28 | 横浜ゴム株式会社 | タイヤトレッド用ゴム組成物 |
US10759914B2 (en) * | 2015-12-31 | 2020-09-01 | Compagnie Generale Des Etablissements Michelin | Tire thread with low Tg rubber |
EP3478509A1 (en) * | 2016-06-30 | 2019-05-08 | Compagnie Générale des Etablissements Michelin | Functionalized rubber composition |
WO2018004579A1 (en) * | 2016-06-30 | 2018-01-04 | Compagnie Generale Des Etablissements Michelin | Functionalized rubber composition with sbr/br rubber |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10176080A (ja) * | 1996-12-17 | 1998-06-30 | Sumitomo Rubber Ind Ltd | タイヤトレッド用ゴム組成物 |
JPH11199712A (ja) * | 1997-11-11 | 1999-07-27 | Jsr Corp | ゴム組成物 |
JP2002284933A (ja) * | 2001-03-26 | 2002-10-03 | Asahi Kasei Corp | 変性共役ジエン系重合体組成物及びゴム組成物 |
JP2003113287A (ja) * | 2001-10-04 | 2003-04-18 | Kanegafuchi Chem Ind Co Ltd | ウエットグリップ性を改良したゴム組成物 |
JP2008297493A (ja) * | 2007-06-01 | 2008-12-11 | Yokohama Rubber Co Ltd:The | タイヤ用ゴム組成物 |
JP2009138157A (ja) * | 2007-12-10 | 2009-06-25 | Yokohama Rubber Co Ltd:The | タイヤ用ゴム組成物 |
JP2010155935A (ja) * | 2008-12-26 | 2010-07-15 | Nippon Zeon Co Ltd | 変性芳香族ビニル−共役ジエン共重合体ゴムおよびゴム組成物 |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0798880B2 (ja) * | 1987-09-11 | 1995-10-25 | 株式会社ブリヂストン | 空気入りタイヤ |
US5639530A (en) * | 1995-06-16 | 1997-06-17 | Minnesota Mining And Manufacturing Company | Retroreflective articles comprising a non-thermoplastic hydrocarbon elastomer adhesive layer for life saving devices at sea |
EP0890605B1 (en) * | 1997-07-11 | 2003-04-23 | Bridgestone Corporation | Pneumatic tire |
JP4670639B2 (ja) * | 2003-09-01 | 2011-04-13 | 日本ゼオン株式会社 | 共役ジエン系ゴム組成物、その製造方法およびゴム架橋物 |
JP4492788B2 (ja) | 2004-03-17 | 2010-06-30 | 日本ゼオン株式会社 | 共役ジエン系ゴム組成物およびゴム架橋物 |
JP4911904B2 (ja) * | 2005-03-04 | 2012-04-04 | 株式会社ブリヂストン | ゴム組成物及びそれを用いたタイヤ |
JP5350577B2 (ja) * | 2005-09-15 | 2013-11-27 | 株式会社ブリヂストン | ゴム組成物およびそれを用いたタイヤ |
JP2007321046A (ja) | 2006-05-31 | 2007-12-13 | Yokohama Rubber Co Ltd:The | ゴム組成物及び空気入りタイヤ |
JP5245346B2 (ja) | 2007-10-10 | 2013-07-24 | 日本ゼオン株式会社 | 共役ジエン重合体組成物の製造方法 |
JP5756248B2 (ja) * | 2008-04-28 | 2015-07-29 | 株式会社ブリヂストン | タイヤ |
JP2010126672A (ja) * | 2008-11-28 | 2010-06-10 | Yokohama Rubber Co Ltd:The | タイヤトレッド用ゴム組成物 |
JP2010241898A (ja) | 2009-04-02 | 2010-10-28 | Bridgestone Corp | 空気入りタイヤ |
EP2426169B1 (en) | 2009-04-28 | 2014-10-29 | Bridgestone Corporation | Pneumatic tire |
JP4883172B2 (ja) * | 2009-12-10 | 2012-02-22 | 横浜ゴム株式会社 | タイヤ用ゴム組成物 |
JP5376027B2 (ja) * | 2012-03-08 | 2013-12-25 | 横浜ゴム株式会社 | タイヤ用ゴム組成物 |
-
2011
- 2011-11-25 US US13/991,414 patent/US10072138B2/en active Active
- 2011-11-25 WO PCT/JP2011/077252 patent/WO2012073838A1/ja active Application Filing
- 2011-11-25 CN CN201180058131.XA patent/CN103237842B/zh active Active
- 2011-11-25 DE DE112011104011.3T patent/DE112011104011B9/de active Active
- 2011-11-25 JP JP2012521893A patent/JP5240409B2/ja active Active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10176080A (ja) * | 1996-12-17 | 1998-06-30 | Sumitomo Rubber Ind Ltd | タイヤトレッド用ゴム組成物 |
JPH11199712A (ja) * | 1997-11-11 | 1999-07-27 | Jsr Corp | ゴム組成物 |
JP2002284933A (ja) * | 2001-03-26 | 2002-10-03 | Asahi Kasei Corp | 変性共役ジエン系重合体組成物及びゴム組成物 |
JP2003113287A (ja) * | 2001-10-04 | 2003-04-18 | Kanegafuchi Chem Ind Co Ltd | ウエットグリップ性を改良したゴム組成物 |
JP2008297493A (ja) * | 2007-06-01 | 2008-12-11 | Yokohama Rubber Co Ltd:The | タイヤ用ゴム組成物 |
JP2009138157A (ja) * | 2007-12-10 | 2009-06-25 | Yokohama Rubber Co Ltd:The | タイヤ用ゴム組成物 |
JP2010155935A (ja) * | 2008-12-26 | 2010-07-15 | Nippon Zeon Co Ltd | 変性芳香族ビニル−共役ジエン共重合体ゴムおよびゴム組成物 |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013122237A1 (ja) * | 2012-02-15 | 2013-08-22 | 横浜ゴム株式会社 | タイヤトレッド用ゴム組成物 |
US9139721B2 (en) | 2012-02-15 | 2015-09-22 | The Yokohama Rubber Co., Ltd. | Rubber composition for tire treads |
JP2014047295A (ja) * | 2012-08-31 | 2014-03-17 | Yokohama Rubber Co Ltd:The | タイヤトレッド用ゴム組成物 |
JP2014148590A (ja) * | 2013-01-31 | 2014-08-21 | Nippon Zeon Co Ltd | ゴム組成物 |
JP5846333B2 (ja) * | 2013-02-25 | 2016-01-20 | 横浜ゴム株式会社 | タイヤトレッド用ゴム組成物および空気入りタイヤ |
JP2014231550A (ja) * | 2013-05-28 | 2014-12-11 | 横浜ゴム株式会社 | タイヤ用ゴム組成物および空気入りタイヤ |
JP2016008284A (ja) * | 2014-06-26 | 2016-01-18 | 横浜ゴム株式会社 | タイヤ用ゴム組成物 |
WO2016076424A1 (ja) * | 2014-11-14 | 2016-05-19 | 住友ゴム工業株式会社 | 加硫ゴム組成物の製造方法、加硫ゴム組成物およびそれを用いたスタッドレスタイヤ |
JP2016094559A (ja) * | 2014-11-14 | 2016-05-26 | 住友ゴム工業株式会社 | 加硫ゴム組成物の製造方法、加硫ゴム組成物およびそれを用いたスタッドレスタイヤ |
RU2706665C2 (ru) * | 2014-11-14 | 2019-11-19 | Сумитомо Раббер Индастриз, Лтд. | Способ получения вулканизированной резиновой смеси, вулканизированная резиновая смесь и нешипованная шина, изготовленная с использованием этой резиновой смеси |
JP2018028018A (ja) * | 2016-08-17 | 2018-02-22 | 旭化成株式会社 | 変性共役ジエン系重合体組成物、トレッド用ゴム組成物、及びタイヤ |
Also Published As
Publication number | Publication date |
---|---|
US10072138B2 (en) | 2018-09-11 |
US20130324638A1 (en) | 2013-12-05 |
JP5240409B2 (ja) | 2013-07-17 |
DE112011104011B9 (de) | 2017-07-20 |
JPWO2012073838A1 (ja) | 2014-05-19 |
CN103237842A (zh) | 2013-08-07 |
DE112011104011B4 (de) | 2017-03-09 |
CN103237842B (zh) | 2014-08-13 |
DE112011104011T5 (de) | 2013-08-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5376027B2 (ja) | タイヤ用ゴム組成物 | |
WO2013122237A1 (ja) | タイヤトレッド用ゴム組成物 | |
JP5447667B2 (ja) | タイヤトレッド用ゴム組成物 | |
JP5429255B2 (ja) | タイヤトレッド用ゴム組成物及びこれを用いる空気入りタイヤ | |
WO2012073838A1 (ja) | タイヤトレッド用ゴム組成物 | |
WO2012073841A1 (ja) | タイヤトレッド用ゴム組成物 | |
JP6019946B2 (ja) | タイヤトレッド用ゴム組成物 | |
CN110643094A (zh) | 充气轮胎 | |
JP5691456B2 (ja) | タイヤトレッド用ゴム組成物 | |
JP4817519B2 (ja) | 変性共役ジエン系重合体組成物及びゴム組成物 | |
JP2013166865A (ja) | タイヤトレッド用ゴム組成物 | |
JP5838760B2 (ja) | タイヤトレッド用ゴム組成物 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 2012521893 Country of ref document: JP |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 11845549 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1120111040113 Country of ref document: DE Ref document number: 112011104011 Country of ref document: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13991414 Country of ref document: US |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 11845549 Country of ref document: EP Kind code of ref document: A1 |