WO2022124241A1 - ゴム組成物及びタイヤ - Google Patents

ゴム組成物及びタイヤ Download PDF

Info

Publication number
WO2022124241A1
WO2022124241A1 PCT/JP2021/044587 JP2021044587W WO2022124241A1 WO 2022124241 A1 WO2022124241 A1 WO 2022124241A1 JP 2021044587 W JP2021044587 W JP 2021044587W WO 2022124241 A1 WO2022124241 A1 WO 2022124241A1
Authority
WO
WIPO (PCT)
Prior art keywords
rubber
group
carbon atoms
resin
mass
Prior art date
Application number
PCT/JP2021/044587
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
香奈 三重野
Original Assignee
株式会社ブリヂストン
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社ブリヂストン filed Critical 株式会社ブリヂストン
Priority to JP2022568250A priority Critical patent/JPWO2022124241A1/ja
Publication of WO2022124241A1 publication Critical patent/WO2022124241A1/ja

Links

Classifications

    • 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
    • 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
    • C08C19/22—Incorporating nitrogen atoms into the molecule
    • 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
    • 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
    • C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
    • C08K3/013—Fillers, pigments or reinforcing additives
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
    • C08L23/20—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
    • C08L9/06—Copolymers with styrene
    • C08L9/08—Latex

Definitions

  • the present invention relates to a rubber composition and a tire.
  • tires are desired to have improved handling performance (hereinafter referred to as "WET performance") on wet road surfaces.
  • WET performance improved handling performance
  • Techniques for enhancing the WET performance of the tire include the use of styrene-butadiene rubber as the rubber component and the inclusion of silica in the rubber composition.
  • Patent Document 1 describes WET performance and low heat generation by containing a specific styrene / alkylene block copolymer in the rubber composition. A technique for achieving both of these is disclosed.
  • the rubber component contains a polymer with a high glass transition point (high Tg polymer) added to enhance WET performance, and the point of achieving wear resistance and better low heat generation is not mentioned. The improvement was desired.
  • an object of the present invention is to provide a rubber composition having low heat generation, excellent WET performance and wear resistance, and a tire having greatly improved rolling resistance, WET performance and wear resistance.
  • the gist of the present invention for solving the above-mentioned problems is as follows.
  • the rubber composition of the present invention contains a rubber component, a filler, and a resin, and the rubber component is a two-ended alkoxysilane-modified styrene-butadiene rubber, a one-ended alkoxysilane-modified styrene-butadiene rubber, and an emulsified styrene-butadiene rubber.
  • the mass ratio of the content of the modified styrene-butadiene rubber to the content of the emulsified styrene-butadiene rubber is less than 1.7 (modified SBR / emulsified SBR ⁇ 1.7).
  • the tire of the present invention is characterized in that the rubber composition of the present invention described above is used. With the above configuration, excellent rolling resistance, WET performance and wear resistance can be realized.
  • the present invention it is possible to provide a rubber composition having low heat generation, excellent WET performance and wear resistance. Further, according to the present invention, it is possible to provide a tire with greatly improved rolling resistance, WET performance and wear resistance.
  • the rubber composition of the present invention is a rubber composition containing a rubber component, a filler, and a resin.
  • a rubber component a rubber component that is a rubber component that is a rubber component that is a rubber component that is a rubber component that is a rubber component that is a rubber component that is a rubber component that is a rubber component that is a rubber component that is a rubber component that is a rubber component that is a rubber component that has a rubber component.
  • the rubber composition of the present invention contains a rubber component.
  • the rubber components include a two-ended alkoxysilane-modified styrene-butadiene rubber (hereinafter, may be referred to as "both-ended alkoxysilane-modified SBR") and a one-ended alkoxysilane-modified styrene-butadiene rubber (hereinafter, "one-ended alkoxysilane-modified”). It may contain at least SBR) and emulsified styrene-butadiene rubber (hereinafter, may be referred to as “emulsified SBR”).
  • the two-terminal alkoxysilane-modified SBR and the one-terminal alkoxysilane-modified SBR may be collectively referred to as "modified styrene-butadiene rubber" or "modified SBR".
  • modified SBR such as a double-ended alkoxysilane-modified SBR or a single-ended alkoxysilane-modified SBR as the rubber component
  • the dispersibility of the filler in the rubber composition can be enhanced, so that the WET performance can be improved. Low heat generation and wear resistance can be improved without deterioration.
  • the rubber composition of the present invention can achieve both low heat generation, WET performance and wear resistance at a high level.
  • the "alkoxysilane modification" of the one-terminal alkoxysilane-modified SBR and the two-terminal alkoxysilane-modified SBR is a general term for modifying groups having at least one alkoxy group and at least one silane atom. Further, it is preferable that the alkoxysilane modifying group of the modified SBR further has a nitrogen atom.
  • the nitrogen atom for example, a primary amino group, a primary amino group protected by a hydrolyzable protective group, an onium salt residue of the primary amine, an isocyanate group, a thioisocyanate group, an imine group, and an imine residue.
  • It has a functional group selected from the group consisting of, and is composed of a monovalent hydrocarbon group having 1 to 30 carbon atoms including a linear, branched, alicyclic or aromatic ring, or an oxygen atom, a sulfur atom and a phosphorus atom.
  • a monovalent hydrocarbon group having 1 to 30 carbon atoms including a linear, branched, alicyclic or aromatic ring, or an oxygen atom, a sulfur atom and a phosphorus atom examples thereof include monovalent hydrocarbon groups having 1 to 30 carbon atoms including linear, branched, alicyclic or aromatic rings, which may contain at least one selected heteroatom.
  • the modified SBR is composed of the one-ended alkoxysilane-modified SBR and the two-ended alkoxysilane-modified SBR (one end or both ends of styrene-butadiene rubber (SBR) is alkoxysilane-modified). This is because the rubber component has a high affinity for the filler and the dispersibility of the filler in the rubber composition can be enhanced. Further, as a method for modifying the modified SBR, for example, various modifying agents are reacted with the terminal of the SBR having an active terminal according to the method described in International Publication No. 2003/046020 and Japanese Patent Application Laid-Open No. 2007-217562. Can be manufactured by.
  • the glass transition point (Tg) of the double-ended alkoxysilane-modified SBR is about ⁇ 45 ° C. to ⁇ 15 ° C.
  • Tg of the double-ended alkoxysilane-modified SBR is high, the affinity with the filler is high, and more excellent dispersibility of the filler can be obtained.
  • the glass transition point (Tg) of the one-terminal alkoxysilane-modified SBR is about ⁇ 60 ° C. to ⁇ 30 ° C.
  • the one-ended alkoxysilane-modified SBR is medium, it is possible to achieve a balance between wear resistance, low heat generation, and WET performance.
  • the modification agent for obtaining the one-terminal alkoxysilane-modified SBR and the two-terminal alkoxysilane-modified SBR is not particularly limited, but a modification agent containing a compound represented by the following formula (1) is used. Is preferable.
  • a conjugated diene-based polymer modified with a modifier containing a compound represented by the formula (1) containing an oligosiloxane as a filler-affinitive acting group and a tertiary amino group as the rubber component.
  • Dispersibility of fillers such as silica can be enhanced.
  • the rubber composition of the present invention is greatly improved in low heat generation property and the dispersibility of the filler is improved, so that other physical properties such as wear resistance are not deteriorated.
  • R 1 to R 8 are independently alkyl groups having 1 to 20 carbon atoms; and L 1 and L 2 are independently alkylene groups having 1 to 20 carbon atoms. Is a group; n is an integer of 2-4.
  • R 1 to R 4 may be independently substituted or unsubstituted alkyl groups having 1 to 20 carbon atoms, and when the above R1 to R 4 are substituted. , Independently, an alkyl group having 1 to 10 carbon atoms, a cycloalkyl group having 3 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a cycloalkoxy group having 4 to 10 carbon atoms, and an aryl having 6 to 12 carbon atoms.
  • Ra is an alkyl group with 1 to 9 carbon atoms
  • R1 to R4 may be substituted or unsubstituted alkyl groups having 1 to 10 carbon atoms, and more specifically, the R1 to R4 may be independently substituted or unsubstituted, respectively. It may be an alkyl group having 1 to 6 carbon atoms.
  • R 5 to R 8 are independently substituted or unsubstituted alkyl groups having 1 to 20 carbon atoms, and specifically, substituted or unsubstituted alkyl groups having 1 to 10 carbon atoms.
  • Alkyl group of, more specifically, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms may be used, and when substituted, it may be substituted with a substituent as described above in R1 to R4. ..
  • R5 to R8 are not alkyl groups but hydrolyzable substituents, the bonds of N - R5R6 and N- R7R8 are hydrolyzed to NH in the presence of water to process the polymer. It can adversely affect sexuality.
  • R 1 to R 4 may be a methyl group or an ethyl group
  • R 5 to R 8 may be an alkyl group having 1 to 10 carbon atoms. can.
  • the amino group in the compound represented by the formula (1) that is, N - R5 R6 and N- R7R8 are preferably tertiary amino groups.
  • the tertiary amino group makes it possible to have further excellent processability when the compound represented by the formula (1) is used as a denaturing agent. If a protecting group for protecting an amino group is bound to R 5 to R 8 or hydrogen is bound, it may be difficult to realize the effect of the compound represented by the formula (1). There is sex. When hydrogen is bonded, the anion reacts with hydrogen in the modification process and loses reactivity, making the modification reaction itself impossible.
  • the deprotected primary or secondary amino group is deprotected by hydrolysis during post-processing in the state of being bound to the primary or secondary amino group, and the deprotected primary or secondary amino group causes a high viscosity of the formulation during the subsequent compounding. , May cause deterioration of workability.
  • L 1 and L 2 in the compound represented by the above formula (1) are independently substituted or unsubstituted alkylene groups having 1 to 20 carbon atoms. More specifically, L 1 and L 2 are independently alkylene groups having 1 to 10 carbon atoms, and more specifically, alkylene groups having 1 to 6 carbon atoms such as a methylene group, an ethylene group or a propylene group. Can be the basis.
  • the bond between Si and N may be broken during the subsequent treatment step, and the secondary amino group generated at this time may be washed away by water during the post-treatment.
  • the modified conjugated diene-based polymer produced with high properties it is difficult to bond with the silica filler due to the amino group member that promotes the bond with the silica filler, and as a result, the dispersion effect of the dispersant is reduced. There is.
  • each of L 1 and L 2 has 1 to 3 carbon atoms such as a methylene group, an ethylene group or a propylene group, respectively.
  • the alkylene group of the above is more preferable, and more specifically, it can be a propylene group.
  • L 1 and L 2 can be substituted with a substituent as described above in R1 to R4.
  • the compound represented by the formula (1) is preferably, for example, any one of the compounds represented by the following formulas (1a) to (1e). This is because better low heat generation can be realized.
  • the alkoxysilane structure is bonded to the activated terminal of the conjugated diene polymer, while the Si—O—Si structure and three or more bonded to the terminal are bonded.
  • the amino group of the above promotes the bond between the filler and the modified conjugated diene polymer as compared with the conventional modifier containing one amino group in the molecule. Can be done.
  • the degree of binding of the activated end of the conjugated diene polymer is uniform and the change in the molecular weight distribution is observed before and after the coupling, the molecular weight distribution does not become larger than before even after the coupling and is constant.
  • the physical properties of the modified conjugated diene polymer itself are not deteriorated, the aggregation of the filler in the rubber composition can be prevented, and the dispersibility of the filler can be improved, so that the processability of the rubber composition can be improved. can.
  • reaction formula (1) The compound represented by the formula (1) can be produced through a condensation reaction represented by the following reaction formula 1. (Reaction formula 1)
  • R1 to R8, L1 and L2, and n are the same as those defined in the above-mentioned formula (1), and R'and R'' are used in the condensation reaction. Any substituent that has no effect.
  • the R'and R'' can be independently the same as any one of R 1 to R 4 .
  • the reaction of the reaction formula 1 is carried out under acid conditions, and the acid can be used without limitation as long as it is generally used for the condensation reaction. Those skilled in the art can select the optimum acid according to various process variables such as the type of reactor in which the reaction is carried out, the starting material, and the reaction temperature.
  • the modified SBR modified by the modifying agent containing the compound represented by the formula (1) has a narrow molecular weight distribution of 1.1 to 3.0: Mw / Mn (also referred to as polydispersity index (PDI)). be able to. If the molecular weight distribution of the modified SBR is more than 3.0 or less than 1.1, the tensile properties and viscoelasticity may deteriorate when applied to the rubber composition. Considering the remarkable effect of improving the tensile properties and viscoelasticity of the polymer by controlling the molecular weight distribution of the modified SBR, the molecular weight distribution of the modified SBR is preferably 1.3 to 2.0.
  • the modified SBR is similar to the molecular weight distribution of the styrene-butadiene rubber before the modification by using the modifying agent.
  • the molecular weight distribution of the modified SBR can be calculated from the ratio (Mw / Mn) of the weight average molecular weight (Mw) to the logarithmic average molecular weight (Mn).
  • the number average molecular weight (Mn) is a common average of individual polymer molecular weights calculated by measuring the molecular weights of n polymer molecules and dividing by n to obtain the total of these molecular weights.
  • the weight average molecular weight (Mw) represents the molecular weight distribution of the polymer composition.
  • the average total molecular weight can be expressed in grams (g / mol) per mole.
  • the weight average molecular weight and the number average molecular weight are polystyrene-equivalent molecular weights analyzed by gel permeation chromatography (GPC), respectively.
  • the modified SBR satisfies the above-mentioned condition of molecular weight distribution, and at the same time, has a number average molecular weight (Mn) of 50,000 g / mol to 2,000,000 g / mol, and more specifically, 200,000 g / mol or more. It can be 800,000 g / mol.
  • the modified SBR has a weight average molecular weight (Mw) of 100,000 g / mol to 4,000,000 g / mol, and more specifically, it can be 300,000 g / mol to 1,500,000 g / mol.
  • the weight average molecular weight (Mw) of the modified SBR is less than 100,000 g / mol or the number average molecular weight (Mn) is less than 50,000 g / mol, there is a risk of deterioration of tensile properties when applied to the rubber composition. There is.
  • the weight average molecular weight (Mw) exceeds 4,000,000 g / mol or the number average molecular weight (Mn) exceeds 2,000,000 g / mol, the workability of the rubber composition is reduced due to the deterioration of the processability of the modified SBR. It may be aggravated, difficult to knead, and it may be difficult to sufficiently improve the physical properties of the rubber composition.
  • the modified SBR according to an embodiment of the present invention is made of rubber when the conditions of weight average molecular weight (Mw) and number average molecular weight (Mn) are simultaneously satisfied with the molecular weight distribution. It is possible to improve the viscoelasticity and processability of the rubber composition at the time of application to the composition in a well-balanced manner.
  • the modified SBR may have a Mooney viscosity (MV) at 100 ° C. of 40 to 140, specifically 60 to 100.
  • MV Mooney viscosity
  • the Mooney viscosity can be measured with a Mooney viscometer, for example, Monsanto's MV2000E at 100 ° C. using a RotorSpeed 20.02 rpm, Large Rotor.
  • the sample used at this time can be left at room temperature (23 ⁇ 3 ° C.) for 30 minutes or more, and then 27 ⁇ 3 g is collected and filled inside the die cavity, and the platen can be operated for measurement.
  • the one-terminal alkoxysilane-modified SBR is modified by a modifying agent containing a compound represented by the formula (1) at one end, while the other end is represented by the formula (3). It can also be further modified by a denaturing agent containing the compound. Since the dispersibility of the filler in the rubber composition can be further improved, both low heat generation and wear resistance can be achieved at a higher level.
  • R 1 to R 3 are independently hydrogen; an alkyl group having 1 to 30 carbon atoms; an alkenyl group having 2 to 30 carbon atoms; an alkynyl group having 2 to 30 carbon atoms; a carbon number of carbon atoms.
  • 1 to 30 heteroalkyl groups 2 to 30 carbons heteroalkenyl groups; 2 to 30 carbons heteroalkynyl groups; 5 to 30 carbons cycloalkyl groups; 6 to 30 carbons aryl groups; or carbons It is a heterocyclic group of 3 to 30, and R4 is a single bond; an alkylene group having 1 to 20 carbon atoms substituted or unsubstituted as a substituent; a cyclo having 5 to 20 carbon atoms substituted or unsubstituted as a substituent.
  • n is an integer of 1 to 5
  • at least one of R 5 is the following chemical formula (3a) or chemical formula (3b).
  • n is an integer of 2 to 5
  • it is a group of action represented, and a plurality of R5s may be the same as or different from each other.
  • R 6 is an alkylene group having 1 to 20 carbon atoms substituted or unsubstituted as a substituent; a cycloalkylene group having 5 to 20 carbon atoms substituted or unsubstituted as a substituent; or a substituent.
  • R7 and R8 are carbons substituted or unsubstituted by an alkyl group having 1 to 10 carbon atoms, a cycloalkyl group having 5 to 10 carbon atoms, or an aryl group having 6 to 20 carbon atoms independently of each other.
  • Alkyl group Heteroalkenyl group with 2 to 30 carbons; Heteroalkynyl group with 2 to 30 carbons; Cycloalkyl group with 5 to 30 carbons; Aryl group with 6 to 30 carbons; If X is an N, O or S atom and X is O or S, then R9 is absent.
  • R 10 is an alkylene group having 1 to 20 carbon atoms substituted or unsubstituted as a substituent; a cycloalkylene group having 5 to 20 carbon atoms substituted or unsubstituted as a substituent; or a substituent.
  • R 11 and R 12 are groups, independently of each other, an alkyl group having 1 to 30 carbon atoms; an alkenyl group having 2 to 30 carbon atoms; an alkynyl group having 2 to 30 carbon atoms; a heteroalkyl group having 1 to 30 carbon atoms. Heteroalkenyl group with 2 to 30 carbon atoms; Heteroalkynyl group with 2 to 30 carbon atoms; Cycloalkyl group with 5 to 30 carbon atoms; Aryl group with 6 to 30 carbon atoms; be.
  • R 1 to R 3 are independently hydrogen; an alkyl group having 1 to 10 carbon atoms; an alkenyl group having 2 to 10 carbon atoms; or 2 to 10 carbon atoms.
  • R4 is a single-bonded; or unsubstituted alkylene group having 1 to 10 carbon atoms
  • R5 is an alkyl group having 1 to 10 carbon atoms; an alkenyl group having 2 to 10 carbon atoms.
  • R 6 has an unsubstituted carbon number of 1 to 10.
  • R 7 and R 8 are alkylene groups that are independent of each other and have 1 to 10 carbon atoms, and R 7 is an alkyl group having 1 to 10 carbon atoms; cycloalkyl having 5 to 20 carbon atoms.
  • the compound represented by the above formula (3) can be a compound represented by the following formulas (3-1) to (3-3).
  • the modifier containing the compound represented by the formula (3) is used as the modification initiator.
  • the formula (3) can be added to the styrene-butadiene rubber.
  • the rubber component contains emulsified SBR in addition to the modified SBR.
  • the emulsified SBR is a styrene-butadiene rubber synthesized by emulsion polymerization.
  • the emulsified SBR is synthesized by emulsion polymerization.
  • a radically polymerizable monomer is emulsified in water using an emulsifying agent, and a radical initiator is added to the obtained emulsion. It can be obtained by a method that undergoes a step of radical polymerization.
  • the emulsion can be prepared by a known method using an emulsifier.
  • the emulsifier is not particularly limited, and known materials can be used, and examples thereof include fatty acid salts and rosin salts.
  • Examples of the fatty acid salt and rosinate include potassium salts such as capric acid, lauric acid and myristic acid, or sodium salts.
  • the emulsion polymerization can be carried out by a known method using a radical polymerization initiator.
  • the radical polymerization initiator is not particularly limited, and known materials can be used. Examples thereof include a redox-based initiator such as paramenthane hydroperoxide and a persulfate such as ammonium persulfate.
  • the temperature of emulsion polymerization may be appropriately changed depending on the type of radical initiator used, but is preferably 0 to 50 ° C, more preferably 0 to 20 ° C.
  • the emulsion polymerization can be stopped by adding a polymerization terminator to the polymerization system.
  • the polymerization terminator is not particularly limited, and known materials can be used. For example, N, N'-dimethyldithiocarbamate, diethylhydroxylamine, hydroquinone and the like can be mentioned.
  • the content of the modified SBR with respect to the content of the emulsified styrene-butadiene rubber is required to be less than 1.7 by mass ratio (modified SBR / emulsified SBR ⁇ 1.7).
  • the content of the emulsified SBR is higher than the content of the modified SBR (satisfying the modified SBR / emulsified SBR ⁇ 1.7), so that the dispersibility and low heat generation of the filler are improved and the wear resistance is improved. It is possible to surely suppress the deterioration of the property and the deterioration of the WET performance.
  • the mass ratio of the content of the modified SBR to the content of the emulsified SBR is preferably less than 1.7 (modified SBR / emulsified SBR ⁇ 1.7).
  • the mass ratio of the content of the modified SBR to the content of the emulsified SBR is 0.1 or more (modified SBR / emulsified SBR ⁇ 0.1). Is preferable.
  • the rubber component in addition to the above-mentioned modified SBR and emulsified SBR, the rubber component further includes natural rubber (NR), polybutadiene rubber (BR), polyisoprene rubber (IR), and butyl rubber (IIR).
  • NR natural rubber
  • BR polybutadiene rubber
  • IR polyisoprene rubber
  • IIR butyl rubber
  • Ethylene-propylene copolymer and other rubber components can be contained, and among these, at least one of natural rubber, polyisoprene rubber and polybutadiene rubber is contained as other rubber components. It is preferable to do so.
  • These rubber components may be used alone or as a blend of two or more.
  • the rubber composition of the present invention further contains a filler in addition to the rubber component described above.
  • a filler in addition to the rubber component described above.
  • the content of the filler is not particularly limited, but is preferably 10 parts by mass or more, more preferably 20 parts by mass or more with respect to 100 parts by mass of the rubber component. It is more preferably 30 parts by mass or more, more preferably 160 parts by mass or less, more preferably 140 parts by mass or less, and 120 parts by mass or less with respect to 100 parts by mass of the rubber component. Is more preferable. This is because it is possible to realize better low heat generation and wear resistance by optimizing the amount of the filler, and when the content is 10 parts by mass or more, sufficient wear resistance can be obtained. When the content is 160 parts by mass or less, deterioration of low heat generation can be suppressed.
  • the type of the filler may be any reinforcing filler usually used in the rubber field, and for example, water such as carbon black, silica, and hygilite (aluminum hydroxide produced by the Bayer process using bauxite as a raw material). Examples thereof include aluminum oxide, talc, clay and titanium oxide.
  • the filler preferably contains an inorganic filler having an average particle diameter of 0.4 ⁇ m or more, and contains an inorganic filler having an average particle diameter of 0.5 ⁇ m or more, from the viewpoint of realizing more excellent low heat generation and WET performance. Is more preferable. From the viewpoint of surely suppressing the decrease in wear resistance, the particle size of the filler is preferably 2 ⁇ m or less.
  • the filler preferably contains at least one of silica and aluminum hydroxide among the above-mentioned fillers.
  • the interaction with the rubber component becomes particularly high, and low heat generation and wear resistance can be achieved at a higher level.
  • the reinforcing filler contains both the silica and the aluminum hydroxide.
  • silica is not particularly limited.
  • wet silica hydro silicic acid
  • dry silica anhydrous silicic acid
  • calcium silicate aluminum silicate and the like
  • wet silica is preferable.
  • These silicas may be used alone or in combination of two or more.
  • precipitated silica can be used as the wet silica.
  • Precipitated silica means that the reaction solution is allowed to react in a relatively high temperature, neutral to alkaline pH range at the initial stage of production to grow silica primary particles, and then controlled to the acidic side to aggregate the primary particles. It is the silica obtained as a result of making it.
  • the pre-silica has a CTAB (cetyltrimethylammonium bromide) specific surface area of preferably 50 m 2 / g or more, preferably 350 m 2 / g or less.
  • CTAB cetyltrimethylammonium bromide
  • the content thereof is not particularly limited, but is preferably 50 parts by mass or more, and more preferably 60 parts by mass or more with respect to 100 parts by mass of the rubber component. It is preferable, and it is preferably 100 parts by mass or less, and more preferably 90 parts by mass or less with respect to 100 parts by mass of the rubber component. This is because by optimizing the amount of the filler, it is possible to realize better low heat generation and wear resistance without deteriorating other performance, and the silica content is 100 mass by mass of the rubber component. Sufficient wear resistance is obtained when the amount is 20 parts by mass or more, and when the silica content is 150 parts by mass or less with respect to 100 parts by mass of the rubber component, the workability is high. Deterioration can be suppressed.
  • the filler preferably contains carbon black in addition to the silica and the hygilite. This is because better reinforcement and wear resistance can be realized.
  • the carbon black include carbon blacks such as GPF, FEF, SRF, HAF, ISAF, IISAF, and SAF grade.
  • the content of the carbon black is preferably 2 parts by mass or more, and more preferably 4 parts by mass or more with respect to 100 parts by mass of the rubber component. preferable. This is because the wear resistance of the rubber composition can be further improved by setting the content of the carbon black to 2 parts by mass or more with respect to 100 parts by mass of the rubber component. Further, the content of the carbon black is preferably 150 parts by mass or less, more preferably 90 parts by mass or less, and further preferably 70 parts by mass or less with respect to 100 parts by mass of the rubber component. preferable. By setting the content of the carbon black to 150 parts by mass or less with respect to 100 parts by mass of the rubber component, it is possible to further improve low heat generation and workability while maintaining a high level of wear resistance. ..
  • the rubber composition of the present invention contains a resin in addition to the above-mentioned rubber component and filler. By including the resin in the rubber composition, the WET performance when applied to a tire can be enhanced.
  • the content of the resin needs to be 2 parts by mass or more with respect to 100 parts by mass of the rubber component, and is preferably 4 parts by mass or more. This is because the WET performance can be further improved when the content of the resin is 2 parts by mass or more with respect to 100 parts by mass of the rubber component.
  • the content of the thermoplastic resin is preferably 10 parts by mass or less with respect to 100 parts by mass of the rubber component, preferably 8 parts by mass, from the viewpoint of suppressing deterioration of low heat generation and wear resistance of the rubber composition. It is more preferable that the amount is less than or equal to the part.
  • the resin examples include thermoplastic resins such as C5 resin, C5 - C9 resin, C9 resin, dicyclopentadiene resin, terpenephenol resin, terpene resin, rosin resin, and alkylphenol resin.
  • thermoplastic resins such as C5 resin, C5 - C9 resin, C9 resin, dicyclopentadiene resin, terpenephenol resin, terpene resin, rosin resin, and alkylphenol resin.
  • thermoplastic resin contains at least one of a C5 resin, a C5 - C9 resin, a C9 resin, a dicyclopentadiene resin, a terpenephenol resin, a terpene resin, a rosin resin, and an alkylphenol resin
  • WET performance can be further improved.
  • the resin may be used alone or in combination of two or more.
  • the C5 resin refers to a C5 synthetic petroleum resin
  • the C5 resin includes, for example, a C5 fraction obtained by thermal decomposition of naphtha in the petroleum chemical industry , such as AlCl 3, BF 3 , and the like.
  • Examples thereof include an aliphatic petroleum resin obtained by polymerization using the Friedelcrafts type catalyst of.
  • the C5 distillate usually contains an olefin hydrocarbon such as 1 - pentene, 2-pentene, 2-methyl-1-butene, 2-methyl-2-butene, 3-methyl-1-butene, 2-.
  • Diolefin hydrocarbons such as methyl-1,3-butadiene, 1,2-pentadiene, 1,3-pentadiene and 3-methyl-1,2-butadiene are included.
  • C5 resin a commercially available product can be used.
  • Escolets (registered trademark) 1000 series which is an aliphatic petroleum resin manufactured by ExxonMobil Chemical Corporation, and an aliphatic petroleum manufactured by Nippon Zeon Corporation.
  • “Quinton (registered trademark) 100 series” which are petroleum resins, "A100, B170, M100, R100", “T-REZ RA100” manufactured by Tonen Chemical Corporation and the like can be mentioned.
  • the C5- C9 - based resin refers to a C5- C9 - based synthetic petroleum resin
  • the C5- C9 - based resin includes, for example, a petroleum - derived C5 fraction and a C9 fraction.
  • AlCl 3 , BF 3 , etc. and examples thereof include solid polymers obtained by polymerization using Friedelcraft type catalysts, more specifically, styrene, vinyltoluene, ⁇ -methylstyrene, inden, etc. as main components. Examples thereof include copolymers that are used.
  • the C 5 -C 9 series resin a resin having a small amount of C 9 or more components is preferable from the viewpoint of compatibility with the rubber component.
  • C 9 or more means that the components of C 9 or more in the total amount of the resin are less than 50% by mass, preferably 40% by mass or less.
  • a commercially available product can be used as the C5 - C9 resin.
  • the product name "Quinton (registered trademark) G100B” manufactured by Nippon Zeon Co., Ltd.
  • ECR213 ExxonMobil Chemical Corporation
  • Product name "T-REZ RD104" manufactured by Tonen Chemical Corporation
  • the main monomers of the C9 resin are vinyltoluene, alkylstyrene, and inden, which are C9 distillates produced by-product together with basic petrochemical raw materials such as ethylene and propylene by, for example, thermal decomposition of naphtha in the petrochemical industry. It is a resin obtained by polymerizing an aromatic having 9 carbon atoms.
  • specific examples of the C9 fraction obtained by thermal decomposition of naphtha include vinyltoluene, ⁇ -methylstyrene, ⁇ -methylstyrene, ⁇ -methylstyrene, o-methylstyrene, p-methylstyrene, indene and the like. Can be mentioned.
  • the C 9 -based resin is a C 8 fraction such as styrene, a C 10 fraction such as methyl indene, 1,3-dimethylstyrene, etc., and further, naphthalene, vinyl naphthalene, vinyl anthracene, p. -Tert-Butylstyrene or the like is also used as a raw material, and these C8 to C10 fractions and the like can be obtained as a mixture by copolymerization with, for example, a Friedelcrafts type catalyst.
  • the C9 -based resin may be a modified petroleum resin modified with a compound having a hydroxyl group, an unsaturated carboxylic acid compound, or the like.
  • Commercially available products can be used as the C9 -based resin.
  • the trade names "Nisseki Neopolymer (registered trademark) L-90" and “Nisseki” Examples thereof include “Neopolymer (registered trademark) 120", “Nisseki Neopolymer (registered trademark) 130", and “Nisseki Neopolymer (registered trademark) 140" (manufactured by JX Nikko Nisseki Energy Co., Ltd.).
  • the dicyclopentadiene resin is a petroleum resin produced by using dicyclopentadiene as a main raw material, which is obtained by dimerizing cyclopentadiene.
  • dicyclopentadiene resin a commercially available product can be used. For example, among the trade names "Quinton (registered trademark) 1000 series", which is an alicyclic petroleum resin manufactured by Nippon Zeon Corporation, "1105, 1325, 1340 "and the like.
  • the terpene phenol resin can be obtained, for example, by reacting terpenes with various phenols using a Friedel-Crafts type catalyst, or by further condensing with formarin.
  • the raw material terpenes are not particularly limited, and monoterpene hydrocarbons such as ⁇ -pinene and limonene are preferable, those containing ⁇ -pinene are more preferable, and ⁇ -pinene is particularly preferable.
  • terpene phenol resin for example, trade names "Tamanol 803L”, “Tamanol 901” (manufactured by Arakawa Chemical Industry Co., Ltd.), and trade name “YS Polystar (registered trademark) U” series.
  • the terpene resin is a turpentine oil obtained at the same time as obtaining rosin from a pine tree, or a solid resin obtained by blending a polymerization component separated from the turpentine and polymerizing using a Friedelcrafts type catalyst.
  • ⁇ -pinene resin, ⁇ -pinene resin and the like can be mentioned.
  • Commercially available products can be used as the terpene resin.
  • the product name "YS Resin” series PX-1250, TR-105, etc.
  • the product name "Picolite” series manufactured by Hercules Co., Ltd. A115, S115, etc.
  • the rosin resin is a residue remaining after collecting balsams such as pine fat (pine tar), which is the sap of a plant of the pine family, and distilling terepine essential oil.
  • Natural resins as the main component modified resins obtained by modifying them, rosin, etc., and hydrogenated resins. Examples thereof include natural resin rosins, their polymerized rosins and partially hydrogenated rosins; glycerin ester rosins, their partially hydrogenated rosins, fully hydrogenated rosins and polymerized rosins; pentaerythritol ester rosins, their partially hydrogenated rosins and polymerized rosins. ..
  • Examples of the natural resin rosin include raw pine rosin, gum rosin contained in tall oil, tall oil rosin, and wood rosin.
  • Commercially available products can be used as the rosin resin, for example, the product name "Neotoll 105" (manufactured by Harima Kasei Co., Ltd.), the product name "SN Tuck 754" (manufactured by Sannopco Co., Ltd.), and the product name "Lime Resin”. No.
  • the alkylphenol resin is obtained, for example, by a condensation reaction between alkylphenol and formaldehyde under a catalyst.
  • a commercially available product can be used as the alkylphenol resin.
  • the product name "Hitanol 1502P” alkylphenol formaldehyde resin, manufactured by Hitachi Chemical Co., Ltd.
  • the product name "Tackiroll 201” alkylphenol formaldehyde resin, Taoka Chemical Industry Co., Ltd.
  • the rubber composition of the present invention in addition to each of the above-mentioned components, other components can be appropriately selected and blended as long as the effects of the present invention are not impaired, as long as the purpose or necessity is sufficient.
  • Other components include, for example, anti-aging agents, cross-linking accelerators, cross-linking agents, cross-linking accelerators, silane coupling agents, softeners, stearic acid, ozone deterioration inhibitors, and surfactants commonly used in the rubber industry. Additives such as activators can be added as appropriate.
  • anti-aging agent known ones can be used and are not particularly limited.
  • a phenol-based anti-aging agent an imidazole-based anti-aging agent, an amine-based anti-aging agent, and the like can be mentioned.
  • These anti-aging agents may be used alone or in combination of two or more.
  • cross-linking accelerator known ones can be used and are not particularly limited.
  • thiazole-based vulcanization accelerators such as 2-mercaptobenzothiazole and dibenzothiadyldisulfide; N-cyclohexyl-2-benzothiadylsulfenamide, Nt-butyl-2-benzothiadylsulfenamide and the like.
  • Sulfur amide-based vulcanization accelerator guanidine-based vulcanization accelerator such as diphenylguanidine; tetramethylthium disulfide, tetraethyl thiuram disulfide, tetrabutyl thiuram disulfide, tetradodecyl thiuram disulfide, tetraoctyl thiuram disulfide, tetrabenzyl thiuram disulfide, di Examples thereof include a thiuram-based vulcanization accelerator such as pentamethylene thiuram tetrasulfide; a dithiocarbamate-based vulcanization accelerator such as zinc dimethyldithiocarbamate; and zinc dialkyldithiophosphate.
  • a thiuram-based vulcanization accelerator such as pentamethylene thiuram tetrasulfide
  • the cross-linking agent is also not particularly limited.
  • sulfur As the cross-linking accelerator, known ones can be used, and the present invention is not particularly limited.
  • thiazole-based vulcanization accelerators such as 2-mercaptobenzothiazole and dibenzothiadyldisulfide; N-cyclohexyl-2-benzothiadylsulfenamide, Nt-butyl-2-benzothiadylsulfenamide and the like.
  • Sulfur amide-based vulcanization accelerator guanidine-based vulcanization accelerator such as diphenylguanidine; tetramethylthium disulfide, tetraethyl thiuram disulfide, tetrabutyl thiuram disulfide, tetradodecyl thiuram disulfide, tetraoctyl thiuram disulfide, tetrabenzyl thiuram disulfide, di Examples thereof include a thiuram-based vulcanization accelerator such as pentamethylene thiuram tetrasulfide; a dithiocarbamate-based vulcanization accelerator such as zinc dimethyldithiocarbamate; and zinc dialkyldithiophosphate.
  • a thiuram-based vulcanization accelerator such as pentamethylene thiuram tetrasulfide
  • the cross-linking promoting aid examples include zinc oxide (ZnO) and fatty acids.
  • the fatty acid may be saturated or unsaturated, linear or branched, and the carbon number of the fatty acid is not particularly limited, but for example, a fatty acid having 1 to 30, preferably 15 to 30 carbon atoms. More specifically, cyclohexaneic acid (cyclohexanecarboxylic acid), naphthenic acid such as alkylcyclopentane having a side chain; hexanoic acid, octanoic acid, decanoic acid (including branched carboxylic acid such as neodecanoic acid), dodecanoic acid, tetradecane.
  • cyclohexaneic acid cyclohexanecarboxylic acid
  • naphthenic acid such as alkylcyclopentane having a side chain
  • hexanoic acid, octanoic acid decanoic acid (including branche
  • Saturated fatty acids such as acid, hexadecanoic acid and octadecanoic acid (stearic acid); unsaturated fatty acids such as methacrylic acid, oleic acid, linoleic acid and linolenic acid; resin acids such as rosin, tall oil acid and avietic acid. These may be used alone or in combination of two or more. In the present invention, zinc oxide and stearic acid can be preferably used.
  • silane coupling agent examples include bis (3-triethoxysilylpropyl) tetrasulfide, bis (3-triethoxysilylpropyl) trisulfide, bis (3-triethoxysilylpropyl) disulfide, and bis (2-tri).
  • Ethoxysilylethyl) tetrasulfide bis (3-trimethoxysilylpropyl) tetrasulfide, bis (2-trimethoxysilylethyl) tetrasulfide, 3-mercaptopropyltrimethoxysilane, 3-mercaptopropyltriethoxysilane, 2-mercapto Ethyltrimethoxysilane, 2-mercaptoethyltriethoxysilane, 3-trimethoxysilylpropyl-N, N-dimethylthiocarbamoyltetrasulfide, 3-triethoxysilylpropyl-N, N-dimethylthiocarbamoyltetrasulfide, 2-tri Ethoxysilylethyl-N, N-dimethylthiocarbamoyltetrasulfide, 3-trimethoxysilylpropylbenzothiazolyltetrasulf
  • the softener examples include naphthenic base oil, paraffin-based base oil, aroma-based base oil and the like.
  • the content of the softener is preferably 2 to 30 parts by mass with respect to 100 parts by mass of the rubber component. If the content of the softener exceeds 30 parts by mass with respect to 100 parts by mass of the rubber component, the softener may seep out to the surface of the rubber product or the wear resistance may decrease. In addition, since it interacts with the tetrazine moiety in the modified rubber component and shields it, the reactivity is lowered, and there is a possibility that the low loss performance and the wear resistance are lowered.
  • a naphthenic base oil or a paraffinic base oil it is preferable to use a naphthenic base oil.
  • the aroma oil has a large amount of aromatic components, has a high affinity with the chemical as an aromatic compound, and further inhibits the reaction with the polymer, which is not preferable.
  • naphthenic base oils and paraffinic base oils have the effect of diffusing into the polymer and helping to react, and oils having a lower pour point diffuse into the polymer better.
  • the classification of the naphthenic base oil, the paraffin-based base oil, and the aroma-based base oil is determined by the CA value, CP value, and CN value.
  • the naphthenic base oil is classified into TDAE, SRAE, RAE, Black Oil and the like. Further, spindle oil and paraffin oil are classified as the paraffin-based base oil. Furthermore, a mixed oil in which the naphthenic base oil and the naphthenic asphalt are mixed can also obtain a preferable effect.
  • the timing of blending these lubricating oils is not particularly limited, and may be, for example, oil-expanded at the stage of manufacturing the rubber component or added when the rubber composition is kneaded.
  • the rubber composition of the present invention is prepared by blending the filler and the resin with the rubber component, kneading the other components appropriately selected, extruding or rolling, and then vulcanizing. Can be manufactured.
  • the kneading conditions are not particularly limited, and are intended for various conditions such as the input volume of the kneading device, the rotation speed of the rotor, the ram pressure, the kneading temperature, the kneading time, and the type of the kneading device. It can be appropriately selected accordingly.
  • the kneading device include a Banbury mixer, an intermix, a kneader, a roll, etc., which are usually used for kneading a rubber composition.
  • the heating conditions are not particularly limited, and various conditions such as the heating temperature, the heating time, and the heating device can be appropriately selected according to the purpose.
  • the heat-heating device include a heat-heating roll machine and the like, which are usually used for heating the rubber composition.
  • extrusion conditions are not particularly limited, and various conditions such as extrusion time, extrusion speed, extrusion device, and extrusion temperature can be appropriately selected according to the purpose.
  • the extruder include an extruder used for extruding a rubber composition for a tire.
  • the extrusion temperature can be determined as appropriate.
  • the equipment, method, conditions, etc. for performing the vulcanization there are no particular restrictions on the equipment, method, conditions, etc. for performing the vulcanization, and it can be appropriately selected according to the purpose.
  • the device for vulcanization include a molding vulcanizer using a mold used for vulcanizing a rubber composition for a tire.
  • the temperature is, for example, about 100 to 190 ° C.
  • the tire of the present invention is characterized by using the rubber composition of the present invention described above.
  • the rubber composition of the present invention as a tire material, the obtained tire can greatly improve rolling resistance, WET performance and wear resistance.
  • the above-mentioned rubber composition is applied to any member, and among such tire members, it is particularly preferable to apply the rubber composition to a tread.
  • a tire using the rubber composition for a tread can realize a high level of reinforcing property (and thus wear resistance, steering stability, etc.) in addition to the effect of reducing rolling resistance.
  • the gas filled in the tire of the present invention include normal or air with a different oxygen partial pressure, or an inert gas such as nitrogen.
  • the "modified SBR-1" and “modified SBR-2" in Table 1 were prepared under the following conditions.
  • a styrene solution in which 60% by mass of styrene is dissolved in n-hexane is added to 7.99 kg / h in n-hexane, and 1, in n-hexane.
  • a 1,3-butadiene solution in which 3-butadiene was dissolved in 60% by mass was dissolved in 10.55 kg / h, n-hexane 49.11 kg / h, and 1,2-butadiene was dissolved in n-hexane at 2.0% by mass.
  • the temperature of the second reactor is maintained at 65 ° C.
  • the temperature of the third reactor is maintained at 65 ° C.
  • an IR1520 (BASF) solution dissolved in 30% by mass as an antioxidant in the polymerization solution discharged from the third reactor is injected at a rate of 167 g / h and stirred.
  • SBR is obtained by putting the obtained polymer in warm water heated by steam and stirring it to remove the solvent.
  • the styrene content was 41% by mass
  • the vinyl content of the butadiene portion was 45%
  • the weight average molecular weight Mw was 440,000
  • the molecular weight distribution MWD was 1.6.
  • the first reaction solution was injected into the first continuous channel into the continuous reactor using a mass flow meter at a injection rate of 1.0 g / min for the second continuous.
  • the second reaction solution is injected into the equation channel at an injection rate of 1.0 g / min.
  • the temperature of the continuous reactor is maintained at -10 ° C
  • the internal pressure is maintained at 3 bar using a back pressure regulator
  • the residence time in the reactor is adjusted to be within 10 minutes. do.
  • the reaction is terminated to obtain a denaturation initiator.
  • styrene solution in which styrene is dissolved in n-hexane at 60% by weight is 7.99 kg / h in the first reactor, and 1,3 in n-hexane.
  • the solution was 10 g / h, and the solution prepared by dissolving 2,2- (di-2 (tetrahydrofuryl) propane in 10% by weight in n-hexane as a polar additive was 10.0 g / h, and the modification started in the above production example.
  • the agent is injected at a rate of 292.50 g / h.
  • the temperature of the first unit reactor is maintained at 50 ° C., and when the polymerization conversion rate reaches 43%, the first reaction is carried out through the transfer pipe.
  • the polymer is transferred from the vessel to the second reactor.
  • a 1,3-butadiene solution in which 1,3-butadiene is dissolved in n-hexane at a rate of 60% by weight is injected into the second reactor at a rate of 0.95 kg / h.
  • the temperature of the second reactor is maintained at 65 ° C., and when the polymerization conversion rate becomes 95% or more, the polymer is transferred from the second reactor to the third reactor through the transfer pipe. do.
  • the temperature of the third reactor is maintained at 65 ° C.
  • an IR1520 (BASF) solution dissolved in 30% by weight as an antioxidant in the polymerization solution discharged from the third reactor is injected at a rate of 170 g / h and stirred.
  • the obtained polymer is placed in warm water heated with steam and stirred to remove the solvent, thereby obtaining a modified SBR-1 having both ends modified.
  • the amount of oil spread of the obtained modified SBR-1 is 5 parts by mass with respect to 100 parts by mass of the modified SBR-1.
  • modified SBR-3 in Table 1 was prepared under the following conditions. (Preparation of modified SBR-3) To a dry, nitrogen-substituted 800 mL pressure-resistant glass container, add 1,3-butadiene cyclohexane solution and styrene cyclohexane solution to 67.5 g of 1,3-butadiene and 7.5 g of styrene, and add 2,2. -Add 0.09 mmol of ditetrahydrofurylpropane, add 0.7 mmol of n-butyllithium, and then carry out polymerization at 50 ° C. for 1.5 hours.
  • Example 2 and Comparative Example 1 the prototype tires were mounted on the test vehicle, and in the actual vehicle test on the wet road surface, braking on the wet road surface at a speed of 80 km / hour on the test course. After measuring the distance, calculate the inverse of the braking distance. The evaluation is expressed as an exponential value with the reciprocal of the braking distance of Comparative Example 1 as 100, and the results are shown in Table 1. The larger the index value, the better the wet grip property. In Comparative Examples 1 to 6, Examples 1 and 3 to 6, the rubber composition of each sample was vulcanized at 145 ° C.
  • Example 2 Low heat generation
  • rolling resistance is measured based on JIS D 4234: 2009 using prototype tires.
  • the evaluation is expressed in scientific notation from the obtained rolling resistance value by the following formula, and the results are shown in Table 1.
  • Rolling resistance index [(Rolling resistance value of tire of Comparative Example 1) / (Rolling resistance value of prototype tire)] ⁇ 100
  • Comparative Examples 1 to 6 Examples 1 and 3 to 6, the rubber composition of each sample was vulcanized at 145 ° C.
  • Abrasion resistance A sample of each rubber composition is vulcanized at 145 ° C. for 30 minutes to prepare a vulcanized product of the rubber composition.
  • the vulcanized product is used to evaluate wear resistance at 23 ° C. according to the standard test conditions of the Rambone wear test specified in JIS K 6264-2: 2005.
  • the evaluation is expressed exponentially with the reciprocal of the wear amount of Comparative Example 1 as 100, and the results are shown in Table 1. The larger the index value, the better the wear resistance.
  • the present invention it is possible to provide a rubber composition having low heat generation, excellent WET performance and wear resistance. Further, according to the present invention, it is possible to provide a tire with greatly improved rolling resistance, WET performance and wear resistance.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
PCT/JP2021/044587 2020-12-09 2021-12-03 ゴム組成物及びタイヤ WO2022124241A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2022568250A JPWO2022124241A1 (ko) 2020-12-09 2021-12-03

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020-204595 2020-12-09
JP2020204595 2020-12-09

Publications (1)

Publication Number Publication Date
WO2022124241A1 true WO2022124241A1 (ja) 2022-06-16

Family

ID=81973218

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2021/044587 WO2022124241A1 (ja) 2020-12-09 2021-12-03 ゴム組成物及びタイヤ

Country Status (2)

Country Link
JP (1) JPWO2022124241A1 (ko)
WO (1) WO2022124241A1 (ko)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010058782A (ja) * 2008-08-07 2010-03-18 Sumitomo Rubber Ind Ltd タイヤ
JP2010111753A (ja) * 2008-11-05 2010-05-20 Sumitomo Rubber Ind Ltd ゴム組成物及びタイヤ
JP2017075277A (ja) * 2015-10-16 2017-04-20 東洋ゴム工業株式会社 ゴム組成物及び空気入りタイヤ

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010058782A (ja) * 2008-08-07 2010-03-18 Sumitomo Rubber Ind Ltd タイヤ
JP2010111753A (ja) * 2008-11-05 2010-05-20 Sumitomo Rubber Ind Ltd ゴム組成物及びタイヤ
JP2017075277A (ja) * 2015-10-16 2017-04-20 東洋ゴム工業株式会社 ゴム組成物及び空気入りタイヤ

Also Published As

Publication number Publication date
JPWO2022124241A1 (ko) 2022-06-16

Similar Documents

Publication Publication Date Title
JPWO2018186367A1 (ja) ゴム組成物及びタイヤ
JP6857742B2 (ja) 変性共役ジエン系重合体の製造方法
JP6564882B2 (ja) 有機リチウム化合物、これを利用した変性共役ジエン系重合体の製造方法及び変性共役ジエン系重合体
JP7403497B2 (ja) 変性共役ジエン系重合体、およびそれを含むゴム組成物
JP7364442B2 (ja) ゴム組成物及びタイヤ
EP4067110B1 (en) Rubber composition and tire
JP6858179B2 (ja) ゴム組成物
KR101759402B1 (ko) 변성 공역디엔계 중합체, 이의 제조방법, 및 이를 포함하는 고무 조성물
JP7019818B2 (ja) 官能化ポリマー、官能化ポリマーの調製プロセス、及び官能化ポリマーを含有するゴム組成物
JP7000318B2 (ja) ゴム組成物、及びタイヤ
JP2022532086A (ja) 変性剤、およびそれを用いて製造された変性共役ジエン系重合体
JP2020504213A (ja) 変性共役ジエン系重合体、およびそれを含むゴム組成物
JP2022054761A (ja) 水添ランダム共重合体の製造方法
JP7314034B2 (ja) ゴム組成物及びタイヤ
WO2022124241A1 (ja) ゴム組成物及びタイヤ
JP2022030649A (ja) 共役ジエン系重合体組成物
JP2024075734A (ja) ゴム組成物及びタイヤ
WO2022195978A1 (ja) ゴム組成物及びタイヤ
WO2022249637A1 (ja) タイヤ用ゴム組成物、トレッドゴム及びタイヤ
WO2022249636A1 (ja) タイヤ用ゴム組成物、トレッドゴム及びタイヤ
WO2022249765A1 (ja) タイヤ用ゴム組成物、トレッドゴム及びタイヤ
WO2022195977A1 (ja) ゴム組成物及びタイヤ
WO2022124147A1 (ja) ゴム組成物、ゴム組成物の製造方法及びタイヤ
WO2022249764A1 (ja) タイヤ用ゴム組成物、トレッドゴム及びタイヤ
WO2022249767A1 (ja) タイヤ用ゴム組成物、トレッドゴム及びタイヤ

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21903344

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2022568250

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21903344

Country of ref document: EP

Kind code of ref document: A1