WO2015104955A1 - 空気入りタイヤ - Google Patents
空気入りタイヤ Download PDFInfo
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- WO2015104955A1 WO2015104955A1 PCT/JP2014/083127 JP2014083127W WO2015104955A1 WO 2015104955 A1 WO2015104955 A1 WO 2015104955A1 JP 2014083127 W JP2014083127 W JP 2014083127W WO 2015104955 A1 WO2015104955 A1 WO 2015104955A1
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- 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
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- 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
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- 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
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- 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
- 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
-
- 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
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2261/00—Macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain of the macromolecule
- C08G2261/30—Monomer units or repeat units incorporating structural elements in the main chain
- C08G2261/33—Monomer units or repeat units incorporating structural elements in the main chain incorporating non-aromatic structural elements in the main chain
- C08G2261/332—Monomer units or repeat units incorporating structural elements in the main chain incorporating non-aromatic structural elements in the main chain containing only carbon atoms
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- 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
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/006—Additives being defined by their surface area
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L65/00—Compositions of macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain; Compositions of derivatives of such polymers
Definitions
- the present invention relates to a pneumatic tire having a tread made using a rubber composition for a tire.
- the pneumatic tire is composed of various members such as a tread, a sidewall, etc., and various performances are given according to each member.
- the tread in contact with the road surface is required to have performance such as wet grip performance from the viewpoint of safety etc., and a method of improving the performance by addition of aluminum hydroxide has been proposed. It is not often used for tires for general public roads, because
- Patent Document 1 discloses that wet grip performance, abrasion resistance, and processability are improved by using a specific rubber component and a specific inorganic reinforcing agent such as aluminum hydroxide. There is still room for improvement in terms of both wear resistance, and there is a demand for well-balanced improvement in performance including elongation at break.
- Patent No. 4559573 gazette
- An object of the present invention is to provide a pneumatic tire having a tread produced by using the rubber composition for a tire, which has solved the above-mentioned problems and has well-balanced wet grip performance, wear resistance and elongation at break. .
- the present invention comprises a rubber component, an inorganic reinforcing agent represented by the following formula, an average particle diameter of 1.5 ⁇ m or less, and a nitrogen adsorption specific surface area of 3 to 120 m 2 / g, wet silica, and a softening point of -20 to 45 ° C.
- Rubber for a tire comprising a coumarone-indene resin of the present invention and / or a terpene resin having a softening point of 100 to 170 ° C., and the content of the inorganic reinforcing agent is 1 to 60 parts by mass
- the present invention relates to a pneumatic tire having a tread made using the composition.
- M 1 is at least one metal selected from the group consisting of Al, Mg, Ti, Ca and Zr, oxides or hydroxides of the metal, k is an integer of 1 to 5, x Is an integer of 0 to 10, y is an integer of 2 to 5, and z is an integer of 0 to 10.
- the inorganic reinforcing agent has an average particle size of 0.69 ⁇ m or less and a nitrogen adsorption specific surface area of 10 to 50 m 2 / g, and the wet silica has a nitrogen adsorption specific surface area of 80 to 300 m 2 / g and the content thereof
- the amount is preferably 15 to 130 parts by mass with respect to 100 parts by mass of the rubber component.
- the content of the coumarone-indene resin is preferably 0.5 to 60 parts by mass with respect to 100 parts by mass of the rubber component.
- the content of the terpene resin is preferably 1 to 40 parts by mass with respect to 100 parts by mass of the rubber component.
- butadiene rubber synthesized using a rare earth element-based catalyst is contained in 100% by mass of the rubber component.
- the inorganic reinforcing agent is obtained by mixing aluminum hydroxide and at least the rubber component and the aluminum hydroxide at a discharge temperature of 150 ° C. or higher.
- a rubber component a specific inorganic reinforcing agent having a predetermined average particle size and a nitrogen adsorption specific surface area, wet silica, a specific coumarone indene resin and / or a terpene resin having a predetermined softening point Since the tire is a pneumatic tire having a tread produced using a rubber composition for a tire containing a predetermined amount of W, the wet grip performance, the wear resistance and the elongation at break can be improved in a well-balanced manner.
- the pneumatic tire of the present invention comprises a rubber component, a specific inorganic reinforcing agent having a predetermined average particle size and a nitrogen adsorption specific surface area, a wet silica, and a specific coumarone indene resin and / or a terpene having a predetermined softening point. It has a tread produced using the rubber composition for tires which blended resin.
- the wet grip performance can be improved by adding an inorganic reinforcing agent such as aluminum hydroxide having a specific average particle size and nitrogen adsorption specific surface area, but the following effects (1) to (3) are exhibited: It is assumed that the effect is
- Inorganic reinforcing agents such as compounded aluminum hydroxide (Al (OH) 3 ) are converted to alumina (Al 2 O 3 ), which has a Mohs hardness greater than that of silica during kneading, or aluminum hydroxide
- other inorganic reinforcing agents are bonded (covalently or dehydrated) to silica and immobilized in the rubber compound via the finely dispersed silica chains, whereby the metal oxide lumps and the inorganic reinforcing agents exhibit an anchor effect
- the wet grip performance is considered to be enhanced by the (2)
- the wet grip performance is considered to be improved.
- the wet grip performance is improved by the addition of such conventional inorganic reinforcing agents such as aluminum hydroxide, the wear resistance and the elongation at break are usually deteriorated, so it is necessary to improve them in a well-balanced manner. difficult. Since the present invention adds an inorganic reinforcing agent such as aluminum hydroxide having a specific average particle size and nitrogen adsorption specific surface area, it suppresses deterioration of wear resistance and elongation at break, and maintains good performance. While the wet grip performance is improved, these performances can be improved in a well-balanced manner.
- the abrasion resistance and the elongation at break are also remarkable. Be improved. Therefore, in the present invention, the performance balance of wet grip performance, abrasion resistance and elongation at break, and hence cut chipping property is synergistically improved.
- the rubber component in the present invention is not particularly limited, and isoprene rubber such as natural rubber (NR) and isoprene rubber (IR), butadiene rubber (BR), styrene butadiene rubber (SBR), styrene isoprene butadiene rubber (SIBR), Mention may be made of diene rubbers such as chloroprene rubber (CR) and acrylonitrile butadiene rubber (NBR). Among them, isoprene rubber, BR, and SBR are preferable because good durability can be obtained while securing good steering stability, low fuel consumption, and elongation at break. In particular, in summer tires, it is preferable to use BR and SBR in combination, and in studless tires, since performance on ice is also important, it is preferable to use BR and isoprene rubber in combination.
- NR natural rubber
- IR isoprene rubber
- BR butadiene rubber
- SBR styrene but
- the BR is not particularly limited, and, for example, BR having a high cis content, BR containing 1,2-syndiotactic polybutadiene crystal (SPB), BR synthesized using a rare earth element-based catalyst (rare earth-based BR) Etc. can be used commonly in the tire industry. Among them, rare earth-based BR is preferable because good durability is obtained while securing good steering stability, low fuel consumption, and elongation at break.
- the rare earth-based BR conventionally known ones can be used.
- a rare earth element-based catalyst a lanthanum series rare earth compound, an organic aluminum compound, an aluminoxane, a halogen-containing compound, a catalyst containing a Lewis base if necessary
- those synthesized etc.
- Nd-based BR synthesized using a neodymium-based catalyst is preferable.
- NR of isoprene-based rubber those common in the tire industry such as SIR20, RSS # 3 and TSR20 can be used, and as IR, those common in the tire industry such as IR2200 can be used.
- the SBR is not particularly limited, and examples thereof include emulsion-polymerized SBR (E-SBR), solution-polymerized SBR (S-SBR), and modified SBR for silica modified with a compound having an interaction with silica.
- E-SBR emulsion-polymerized SBR
- S-SBR solution-polymerized SBR
- modified SBR for silica modified with a compound having an interaction with silica since the interaction with silica is strong, silica can be dispersed well and the low fuel consumption and the abrasion resistance can be improved, and thus the modified SBR for silica is preferable.
- modified SBR for silica examples include conventionally known ones such as SBR in which the end of the polymer and the main chain are modified with various modifiers.
- modified SBR and the like described in JP-A-2010-077412, JP-A-2006-274010, JP-A-2009-227858, JP-A-2006-306962, JP-A-2009-275178, etc. are listed.
- modified SBR having a Mw of 1.0 ⁇ 10 5 to 2.5 ⁇ 10 6 obtained by reacting a modifying agent represented by the following general formula (1) can be suitably used.
- n represents an integer of 1 to 10
- R represents a divalent hydrocarbon group (such as -CH 2- )
- R 1 , R 2 and R 3 independently represent each other
- a hydrocarbyl group of 1 to 4 or a hydrocarbyloxy group having 1 to 4 carbon atoms is represented, at least one of R 1 , R 2 and R 3 is a hydrocarbyloxy group, and A represents a functional group having a nitrogen atom.
- the bound styrene content of the modified SBR for silica is preferably 25% by mass or more, more preferably 27% by mass or more. If it is less than 25% by mass, the wet grip performance tends to be inferior.
- the amount of bound styrene is preferably 50% by mass or less, more preferably 45% by mass or less, and still more preferably 40% by mass or less. If it exceeds 50% by mass, the fuel economy may be deteriorated.
- the amount of styrene is calculated by H 1 -NMR measurement.
- the content of BR in 100% by mass of the rubber component is preferably 9% by mass or more, more preferably 15% by mass or more.
- the content is preferably 70% by mass or less, more preferably 65% by mass or less.
- the content of BR in 100% by mass of the rubber component is preferably 9% by mass or more, more preferably 14% by mass It is above.
- the content is preferably 70% by mass or less, more preferably 65% by mass or less. If the amount is less than 9% by mass, sufficient abrasion resistance may not be obtained. If the amount is more than 70% by mass, the abrasion resistance is rather deteriorated and the elongation at break may also be deteriorated.
- the content of SBR in 100% by mass of the rubber component is preferably 10% by mass or more, more preferably 20% by mass or more, and still more preferably 30% by mass or more.
- the upper limit of the content is not particularly limited, and may be 100% by mass, but preferably 90% by mass or less. If it is less than 10% by mass, the grip performance and the vulcanization reversion property may be inferior.
- the content of BR in 100% by mass of the rubber component is preferably 9% by mass or more, more preferably 30% by mass or more, and still more preferably 50% by mass or more.
- the content is preferably 70% by mass or less, more preferably 65% by mass or less, and still more preferably 60% by mass or less. If it is less than 9% by mass, it is difficult to lower the low temperature hardness (-10 to 10 ° C.), and the low temperature grip performance (performance on ice, wet grip performance) may be inferior. Abrasion resistance and performance on ice may be reduced, and processability may also be inferior.
- the content of BR in 100% by mass of the rubber component is preferably 9% by mass or more, more preferably 30% by mass or more More preferably, it is 50% by mass or more.
- the content is preferably 70% by mass or less, more preferably 65% by mass or less, and still more preferably 60% by mass or less. If it is less than 9% by mass, the performance on ice and the abrasion resistance may be deteriorated, and if it exceeds 70% by mass, the abrasion resistance may be deteriorated.
- the content of isoprene-based rubber in 100% by mass of the rubber component is preferably 10% by mass or more, more preferably 20% by mass or more, and still more preferably 30% by mass or more.
- the content is preferably 80% by mass or less, more preferably 70% by mass or less, and still more preferably 60% by mass or less. If it is less than 10% by mass, dry grip performance and processability may be deteriorated, and if it exceeds 80% by mass, low temperature grip performance (performance on ice, wet grip performance) may be deteriorated.
- the rubber composition in the present invention contains an inorganic reinforcing agent represented by the following formula and having a specific average particle size and a nitrogen adsorption specific surface area.
- M 1 is at least one metal selected from the group consisting of Al, Mg, Ti, Ca and Zr, oxides or hydroxides of the metal, k is an integer of 1 to 5, x Is an integer of 0 to 10, y is an integer of 2 to 5, and z is an integer of 0 to 10.
- the inorganic reinforcing agent alumina, alumina hydrate, aluminum hydroxide, magnesium hydroxide, magnesium oxide, talc, titanium white, titanium black, calcium oxide, calcium hydroxide, magnesium aluminum oxide, clay, pyrophyllite, Bentonite, aluminum silicate, magnesium silicate, calcium silicate, calcium aluminum silicate, magnesium silicate, zirconium, zirconium oxide and the like can be mentioned.
- These inorganic compounds may be used alone or in combination of two or more.
- an inorganic reinforcing agent in which M 1 is Al or Zr from the viewpoint that a scratching effect is produced by the oxide film formed in contact with air to improve the wet grip performance and also good abrasion resistance is obtained.
- aluminum hydroxide and zirconium oxide are more preferable.
- Aluminum hydroxide is particularly preferred from the viewpoint of obtaining even better kneading productivity and roll processability.
- the average particle diameter of the inorganic reinforcing agent is 1.5 ⁇ m or less, preferably 0.69 ⁇ m or less, more preferably 0.6 ⁇ m or less.
- the average particle size is preferably 0.2 ⁇ m or more, more preferably 0.25 ⁇ m or more, and still more preferably 0.4 ⁇ m or more. If it exceeds 1.5 ⁇ m, the abrasion resistance and the wet grip performance may be reduced, and if it is less than 0.2 ⁇ m, the inorganic reinforcing agent may self-aggregate and the abrasion resistance and the elongation at break may be reduced. is there.
- the average particle size of the inorganic reinforcing agent is a number average particle size, which is measured by a transmission electron microscope.
- the nitrogen adsorption specific surface area (N 2 SA) of the inorganic reinforcing agent is 3 to 120 m 2 / g. Outside the above range, the abrasion resistance and the wet grip performance may be deteriorated.
- the lower limit of the N 2 SA is preferably 6 m 2 / g or more, more preferably 10 m 2 / g or more, further preferably 12 m 2 / g, and the upper limit is preferably 115 m 2 / g or less, more preferably Is 60 m 2 / g or less, more preferably 50 m 2 / g or less, particularly preferably 40 m 2 / g or less, most preferably 20 m 2 / g or less.
- the N 2 SA is a value measured by the BET method according to ASTM D3037-81. Incidentally, in dry pulverization, it is difficult to prepare an inorganic reinforcing agent having a capacity of 130 m 2 / g or more in terms of equipment capacity.
- the Mohs hardness of the inorganic reinforcing agent is preferably 7 or less, which is equal to that of silica, from the viewpoints of securing the tire abrasion resistance and wet grip performance and suppressing metal wear of a Banbury mixer and an extruder. More preferably, it is 5.
- Mohs hardness is one of the mechanical properties of materials, and has long been widely used in mineral relations, and it rubs substances (such as aluminum hydroxide) whose hardness is to be measured (such as aluminum hydroxide) with a standard substance, with or without scratches. Measure the Mohs hardness.
- an inorganic reinforcing agent having a Mohs hardness of less than 7 and having a thermal decomposition product of the inorganic reinforcing agent having a Mohs hardness of 8 or more aluminum hydroxide has a Mohs hardness of about 3 and prevents attrition (abrasion) of Banbury and rolls, and the surface layer is dewatered (transferred) by vibration, heat generation or partial kneading during traveling, Mohs hardness It is converted to alumina of about 9 and has a hardness higher than that of road stone, so excellent wear resistance and wet grip performance can be obtained.
- the aluminum hydroxide and alumina are stable to water, base and acid, and there is neither inhibition of vulcanization nor acceleration of oxidative deterioration.
- the Mohs hardness after transfer of the inorganic reinforcing agent is more preferably 7 or more, and the upper limit is not particularly limited. Diamonds have a maximum value of 10.
- the inorganic reinforcing agent preferably has a thermal decomposition start temperature (DSC endothermic start temperature) of 160 to 500 ° C., and more preferably 170 to 400 ° C. If the temperature is less than 160 ° C., thermal decomposition or reaggregation may proceed too much during kneading, or metal abrasion of the rotor blades of the kneader or the wall of the container may be excessive.
- the thermal decomposition initiation temperature of the inorganic reinforcing agent can be determined by performing differential scanning calorimetry (DSC). Thermal decomposition also includes dehydration.
- the inorganic reinforcing agent commercially available products having the above-mentioned average particle diameter and N 2 SA characteristics can be used, and the inorganic reinforcing agent is treated to a treatment such as grinding to prepare treated particles having the above-mentioned characteristics, etc. Are also available.
- a treatment such as grinding to prepare treated particles having the above-mentioned characteristics, etc.
- conventionally known methods such as wet grinding and dry grinding (jet mill, current jet mill, counter jet mill, contraplex, etc.) can be applied.
- it can be separated by a membrane filter method frequently used for pharmaceuticals and bio-relevants, and those having a specific average particle diameter and N 2 SA can be prepared and used as a rubber compounding agent.
- the content of the inorganic reinforcing agent is 1 part by mass or more, preferably 2 parts by mass or more, more preferably 3 parts by mass or more, with respect to 100 parts by mass of the rubber component. If the amount is less than 1 part by mass, sufficient wet grip performance may not be obtained.
- the compounding amount is 60 parts by mass or less, preferably 55 parts by mass or less, more preferably 50 parts by mass or less. If the amount is more than 60 parts by mass, the abrasion resistance may be deteriorated to such an extent that it can not be compensated by the adjustment of other compounding agents, and the tensile strength and the like may be deteriorated.
- the N 2 SA of the wet silica is preferably 80 m 2 / g or more, more preferably 110 m 2 / g or more, still more preferably 150 m 2 / g or more.
- the N 2 SA is preferably 300 m 2 / g or less, more preferably 250 m 2 / g or less, and still more preferably 200 m 2 / g or less. If it is less than 80 m 2 / g, the wear resistance may be deteriorated, and if it exceeds 300 m 2 / g, the processability and the fuel efficiency may be deteriorated.
- N 2 SA of the wet silica is measured by the same method as the inorganic reinforcing agent.
- the content of the wet silica is preferably 15 parts by mass or more, more preferably 20 parts by mass or more, and still more preferably 40 parts by mass or more with respect to 100 parts by mass of the rubber component. If the amount is less than 15 parts by mass, sufficient abrasion resistance and wet grip performance may not be obtained. Further, the content is preferably 130 parts by mass or less, more preferably 110 parts by mass or less, and still more preferably 100 parts by mass or less. If the amount is more than 130 parts by mass, fuel economy may be reduced.
- the rubber composition in the present invention may contain other fillers such as carbon black in addition to the inorganic reinforcing agent and the wet silica.
- the carbon black is not particularly limited, but is preferably fine particle carbon in that the effects of the present invention can be sufficiently exhibited.
- the N 2 SA of the carbon black is preferably 80 m 2 / g or more, and more preferably 100 m 2 / g or more. Further, the N 2 SA is preferably 200 m 2 / g or less, more preferably 180 m 2 / g or less. The effect of this invention can fully be exhibited as it is in the said range. Incidentally, N 2 SA of the carbon black is determined by the method A of JIS K6217.
- the content of the carbon black is preferably 1 part by mass or more, more preferably 3 parts by mass or more, and still more preferably 5 parts by mass or more with respect to 100 parts by mass of the rubber component.
- the content is preferably 100 parts by mass or less, more preferably 50 parts by mass or less, and still more preferably 30 parts by mass or less. If it is less than 1 part by mass, sufficient abrasion resistance and elongation at break may not be obtained, and if it exceeds 100 parts by mass, sufficient wet grip performance may not be obtained.
- a silane coupling agent may be blended into the rubber composition, and for example, a compound represented by the following formula (I) can be suitably used.
- a silica can be disperse
- the silane coupling agent represented by the following formula (I) is unlikely to cause rubber scorch, it can be discharged at a high temperature at the time of production.
- p is an integer of 1 to 3, preferably 2. When p is 4 or more, the coupling reaction tends to be delayed.
- q is an integer of 1 to 5, preferably 2 to 4, and more preferably 3. When q is 0 or 6 or more, synthesis is difficult.
- k is an integer of 5 to 12, preferably 5 to 10, more preferably 6 to 8, and still more preferably 7.
- silane coupling agent represented by the above formula (I) examples include NXT manufactured by Momentive Performance Materials.
- the silane coupling agent represented by the above-mentioned formula (I) may be used alone, and other silane coupling agents such as NXT-Z45 manufactured by Momentive, Si69, Si75 manufactured by EVONIK-DEGUSSA, etc. You may use together.
- the content of the silane coupling agent is preferably 0.5 to 20 parts by mass, more preferably 1 to 10 parts by mass, and still more preferably 2 to 7 parts by mass with respect to 100 parts by mass of silica. The effect of this invention can fully be exhibited as it is in the said range.
- the rubber composition in the present invention contains a coumarone-indene resin having a softening point of ⁇ 20 to 45 ° C. and / or a terpene resin having a softening point of 100 to 170 ° C.
- the coumarone indene resin is a resin containing coumarone and indene as a monomer component constituting a resin skeleton (main chain), and as a monomer component contained in the skeleton besides coumarone and indene, styrene, ⁇ -methylstyrene, Methyl indene, vinyl toluene etc. are mentioned.
- the softening point of the coumarone-indene resin is -20 to 45 ° C.
- the upper limit is preferably 40 ° C. or less, more preferably 35 ° C. or less.
- the lower limit is preferably ⁇ 10 ° C. or more, more preferably ⁇ 5 ° C. or more.
- the softening point exceeds 45 ° C., the fuel economy tends to deteriorate. If the softening point is less than ⁇ 20 ° C., it is difficult to produce, and the migration to other members, the volatility are high, and the performance may change during use.
- the softening point of the above-mentioned coumarone-indene resin is a temperature at which the ball descends by measuring the softening point specified in JIS K 6220-1: 2001 with a ring and ball type softening point measuring device.
- terpene resins include terpene compounds and aromatic compounds as raw materials in addition to terpene resins such as ⁇ -pinene resin, ⁇ -pinene resin, limonene resin, dipentene resin, ⁇ -pinene / limonene resin, etc.
- a modified terpene resin, a terpene phenol resin using a terpene compound and a phenol compound as raw materials, a hydrogenated terpene resin obtained by hydrogenating a terpene resin, and the like can be used.
- aromatic compound used as the raw material of aromatic modified terpene resin styrene, alpha-methylstyrene, vinyl toluene, divinyl toluene etc. are mentioned, for example, Moreover, as a phenol type compound used as the raw material of terpene phenol resin for example, phenol, bisphenol A, cresol, xylenol and the like can be mentioned.
- the softening point of the terpene resin is 100 to 170 ° C.
- the upper limit is preferably 165 ° C. or less, more preferably 160 ° C. or less.
- the lower limit is preferably 105 ° C. or more, more preferably 108 ° C. or more, still more preferably 112 ° C. or more. If it exceeds 170 ° C., dispersion tends to be difficult during kneading. If the temperature is less than 100 ° C., there is a possibility that the miniaturization of the NR phase and the BR phase hardly occurs.
- the softening point of the terpene resin can be the same as the method of measuring the softening point of the coumarone-indene resin.
- the content of the coumarone-indene resin is preferably 0.5 parts by mass or more, more preferably 1 part by mass or more, and still more preferably 2 parts by mass or more with respect to 100 parts by mass of the rubber component.
- the content is preferably 60 parts by mass or less, more preferably 50 parts by mass or less, and still more preferably 45 parts by mass or less. If the amount is less than 0.5 parts by mass, the improvement of the abrasion resistance and the elongation at break may be insufficient. If the amount is more than 60 parts by mass, the improvement of the abrasion resistance and the elongation at break is not observed. There is a risk that the fuel efficiency will deteriorate.
- the content of the terpene resin is 1 part by mass or more, preferably 3 parts by mass or more, with respect to 100 parts by mass of the rubber component. Also, the content is preferably 40 parts by mass or less, more preferably 30 parts by mass or less. If the amount is less than 1 part by mass, the improvement of the abrasion resistance and the elongation at break may be insufficient. If the amount is more than 40 parts by mass, the improvement of the abrasion resistance and the elongation at break is not observed May deteriorate.
- the rubber composition according to the present invention may appropriately contain compounding agents generally used in the tire industry, for example, materials such as wax, zinc oxide, anti-aging agent and the like.
- the rubber composition can be prepared by a known method including a kneading step such as a base kneading step and a finishing kneading step.
- the kneading step can be carried out, for example, by kneading these components using a kneader.
- a kneader conventionally known ones can be used, and examples thereof include a Banbury mixer, a kneader, an open roll and the like.
- a step of kneading at least the rubber component and the inorganic reinforcing agent such as the base kneading step (for example, when the base kneading step is carried out in one step, the step, the base kneading step is carried out as a divided base kneading step described later)
- the discharge temperature is 150.degree. C. or higher, preferably 155.degree. C. or higher, more preferably 160.degree. C. or higher, still more preferably 165.degree. ° C or more.
- the thermal decomposition (dehydration reaction) of aluminum hydroxide has a temperature range as shown in FIG. 2, that is, although the endothermic peak of the thermal decomposition start temperature (DSC endothermic start temperature) of aluminum hydroxide is 220 to 350 ° C. Judging from the wet grip performance and abrasion resistance in the rubber mixing test, it is inferred that the dehydration reaction with silica as shown in FIG. 1 occurs at around 150 ° C. The conversion of aluminum hydroxide to alumina takes place moderately, and the actions (1) to (3) are exhibited in a well-balanced manner, and wet grip performance can be significantly improved.
- the temperature is less than 150 ° C., the amount of aluminum hydroxide converted to alumina in the rubber composition is small, and the wet grip performance may be degraded.
- the upper limit of the discharge temperature is not particularly limited, but may be suitably adjusted in a range where rubber scorching does not occur so as to obtain desired performance, but is preferably 190 ° C. or less, more preferably 185 ° C. or less .
- the above-mentioned base kneading process knead mixes a rubber component, carbon black, a silica 2/3 amount, a silane coupling agent 2/3 amount other than the method of performing a base kneading step in 1 step of the said rubber component, inorganic reinforcement etc.
- the kneading time of the inorganic reinforcing agent may be X kneading, Y kneading, Z kneading, or any other timing.
- a final kneading step of kneading components such as a vulcanizing agent such as sulfur, a vulcanization accelerator and the like into the obtained kneaded material 1 using the same kneader as described above (discharge temperature (80 to 110 ° C., etc.), and the obtained kneaded product 2 (unvulcanized rubber composition) is vulcanized at 130 to 190 ° C. for 5 to 30 minutes to carry out a vulcanization step.
- a rubber composition can be produced.
- the rubber composition in the present invention is used for the tread of a tire.
- the pneumatic tire of the present invention can be produced by the usual method using the above rubber composition. That is, according to the shape of the tread of the tire at the unvulcanized stage, a rubber composition containing various additives as needed is extruded and processed on a tire molding machine, and further along with other tire members. After bonding and producing an unvulcanized tire, the unvulcanized tire is heated and pressurized in a vulcanizer, whereby a pneumatic tire can be manufactured.
- the pneumatic tire of the present invention is suitable for passenger car tires, tires for large passenger cars, tires for large SUVs, heavy duty tires such as trucks and buses, and tires for light trucks, and can be used as summer tires and studless tires, respectively is there.
- reaction solution After adding 15 mL of methanol and 0.1 g of 2,6-tert-butyl-p-cresol to the reaction solution, the reaction solution was put into a stainless steel container containing 18 L of methanol to recover aggregates. The obtained aggregate was dried under reduced pressure for 24 hours to obtain modified SBR.
- the Mw was 270,000, the vinyl content was 56%, and the styrene content was 37% by mass.
- the Mw, vinyl content and styrene content of the obtained modified SBR were analyzed by the following method.
- the weight average molecular weight Mw of the modified SBR is determined by gel permeation chromatography (GPC) (GPC-8000 series manufactured by Tosoh Corp., detector: differential refractometer, column: TSKGEL SUPERMALTPORE HZ-M manufactured by Tosoh Corp.) It calculated
- GPC gel permeation chromatography
- NR TSR20 BR1: CB25 (High cis BR synthesized using an Nd catalyst, manufactured by LANXESS Co., Ltd., Tg: -110 ° C)
- BR2 CB29 TDAE (High cis oil-extended BR synthesized using Nd-based catalyst, made by LANXESS Co., Ltd., 37.5 parts by mass of TDAE with respect to 100 parts by mass of the rubber component)
- BR3 Ubepol BR150B (High cis BR synthesized using a Co-based catalyst) manufactured by Ube Industries, Ltd.
- SBR Modified SBR produced in copolymer production example 1
- Carbon black 1 HP 160 (N 2 SA: 165 m 2 / g) manufactured by Columbia Carbon Co., Ltd.
- Carbon black 2 Show black N 220 (N 2 SA: 111 m 2 / g) manufactured by Cabot Japan
- Silica 1 ULTRASIL VN3 manufactured by Evonik (N 2 SA: 175 m 2 / g)
- Silica 2 ULTRASIL U360 manufactured by Evonik (N 2 SA: 50 m 2 / g)
- Inorganic Reinforcing Agent 1 Dry ground product of ATH # B (aluminum hydroxide) manufactured by Sumitomo Chemical Co., Ltd.
- Inorganic Reinforcement 2 Dry ground product of ATH # B (average particle size: 0.21 ⁇ m, N 2 SA: 95 m 2 / g, Mohs hardness: 3, Mohs hardness of thermal decomposition product (alumina): 9)
- Inorganic Reinforcement 3 Dry ground product of ATH # B (average particle size: 0.25 ⁇ m, N 2 SA: 75 m 2 / g, Mohs hardness: 3, Mohs hardness of thermal decomposition product (alumina): 9)
- Inorganic Reinforcement 4 Dry ground product of ATH # B (average particle size: 0.4 ⁇ m, N 2 SA: 35 m 2 / g, Mohs hardness: 3, Mohs hardness of thermal decomposition product (alumina): 9)
- Inorganic Reinforcing Agent 5 Dry ground product of ATH # B (average particle size: 0.4 ⁇ m, N 2 SA: 35 m 2 / g, Mohs hardness: 3, Mohs hardness of thermal de
- Inorganic Reinforcing Agent 11 Wet synthesized product manufactured by Toda Kogyo Co., Ltd.
- Terpene resin 2 YS polystar T115 (softening point: 115 ° C., terpene phenol resin) manufactured by Yasuhara Chemical Co., Ltd.
- Terpene resin 3 YS resin PX1150N (softening point: 115 ° C., ⁇ -pinene resin) manufactured by Yasuhara Chemical Co., Ltd.
- Terpene resin 4 YS resin PX800 (softening point: 80 ° C., ⁇ -pinene resin) manufactured by Yasuhara Chemical Co., Ltd.
- Terpene resin 5 YS polystar T180 (softening point: 180 ° C., terpene phenol resin, trial product) manufactured by Yasuhara Chemical Co., Ltd.
- Styrene-based resin Sylvares SA 85 (softening point: 85 ° C.) manufactured by Arizona Chemical Co.
- Oil 1 Process P-200 manufactured by Japan Energy
- Oil 2 V &V's Vivatec 500 Wax: Ozoace 0355 manufactured by Nippon Seikei Co., Ltd.
- Anti-aging agent 1 Antigen 6C (N- (1,3-dimethylbutyl) -N'-phenyl-p-phenylenediamine) manufactured by Sumitomo Chemical Co., Ltd.
- Anti-aging agent 2 Noclac 224 (2, 2,4-trimethyl-1, 2-dihydroquinoline polymer) manufactured by Ouchi Emerging Chemical Co., Ltd.
- Stearic acid Stearic acid "Nuka” manufactured by NOF Corporation
- Zinc oxide Ginkgo R manufactured by Toho Zinc Co., Ltd. (average particle size: 0.29 ⁇ m, N 2 SA: 4 m 2 / g)
- Sulfur HK-200-5 (5% by mass oil-containing powdered sulfur) manufactured by Hosoi Chemical Industry Co., Ltd.
- Vulcanization accelerator 1 Noccellar NS-G (N-tert-butyl-2-benzothiazolylsulfenamide) manufactured by Ouchi Emerging Chemical Industry Co., Ltd.
- Vulcanization accelerator 2 Noxceler D (1,3-diphenylguanidine) manufactured by Ouchi Shinko Chemical Co., Ltd.
- Example and Comparative Example> According to the blending contents and kneading conditions shown in the summer tire of Table 1 and the studless tire of Table 2, using a Banbury mixer, first, the rubber component, the total amount of carbon black, the silica 2/3 amount, and the silane coupling agent 2 / Knead (X kneading) with 3 volumes for 5 minutes. Next, the kneaded product obtained by the above-mentioned X kneading, the remaining silica, and the remaining silane coupling agent are kneaded, and other components other than sulfur and the vulcanization accelerator are kneaded, and are further kneaded for 5 minutes.
- the obtained unvulcanized rubber composition is molded into the shape of a tread, pasted together with other tire members on a tire molding machine, press-cured for 12 minutes under conditions of 170 ° C., and used for a test tire (tire Size: 245 / 40R18) was obtained.
- the addition of alumina and aluminum hydroxide was introduced at the timing described in Table 1 or 2.
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Abstract
Description
kM1・xSiOy・zH2O
(式中、M1はAl、Mg、Ti、Ca及びZrからなる群より選ばれた少なくとも1種の金属、該金属の酸化物又は水酸化物であり、kは1~5の整数、xは0~10の整数、yは2~5の整数、zは0~10の整数である。)
前記ゴム組成物は、ゴム成分と、所定の平均粒子径及び窒素吸着比表面積を有する特定無機補強剤と、湿式シリカと、所定の軟化点を有する特定クマロンインデン樹脂及び/又はテルペン系樹脂とを含む。
(2)路面上の二酸化ケイ素とタイヤ表面上の水酸化アルミニウムなどの無機補強剤が走行中に接触する(擦れる)ことに伴って、図1で示されるような瞬間的な共有結合が形成され、ウェットグリップ性能が向上すると考えられる。
なお、スチレン量は、H1-NMR測定により算出される。
kM1・xSiOy・zH2O
(式中、M1はAl、Mg、Ti、Ca及びZrからなる群より選ばれた少なくとも1種の金属、該金属の酸化物又は水酸化物であり、kは1~5の整数、xは0~10の整数、yは2~5の整数、zは0~10の整数である。)
また、必要に応じて、医薬、バイオ関係で頻用されるメンブランフィルター法にて分取し、特定の平均粒子径及びN2SAを有するものを作製し、ゴム配合剤として使用することもできる。
(CpH2p+1O)3Si-CqH2q-S-CO-CkH2k+1 (I)
(式中、pは1~3の整数、qは1~5の整数、kは5~12の整数である。)
なお、本明細書において、上記クマロンインデン樹脂の軟化点は、JIS K 6220-1:2001に規定される軟化点を環球式軟化点測定装置で測定し、球が降下した温度である。
窒素雰囲気下、100mlメスフラスコに3-(N,N-ジメチルアミノ)プロピルトリメトキシシラン(アヅマックス(株)製)を23.6g入れ、さらに無水ヘキサン(関東化学(株)製)を加え、全量を100mlにして作製した。
充分に窒素置換した30L耐圧容器にn-ヘキサンを18L、スチレン(関東化学(株)製)を740g、ブタジエンを1260g、テトラメチルエチレンジアミンを10mmol加え、40℃に昇温した。次に、ブチルリチウムを10mL加えた後、50℃に昇温させ3時間撹拌した。次に、上記末端変性剤を11mL追加し30分間撹拌を行った。反応溶液にメタノール15mL及び2,6-tert-ブチル-p-クレゾール0.1gを添加後、反応溶液を18Lのメタノールが入ったステンレス容器に入れて凝集体を回収した。得られた凝集体を24時間減圧乾燥させ、変性SBRを得た。Mwは270,000であり、ビニル含量は56%、スチレン含有量は37質量%であった。
変性SBRの重量平均分子量Mwは、ゲルパーミエーションクロマトグラフ(GPC)(東ソー(株)製GPC-8000シリーズ、検出器:示差屈折計、カラム:東ソー(株)製のTSKGEL SUPERMALTPORE HZ-M)による測定値を基に標準ポリスチレン換算により求めた。
日本電子(株)製JNM-ECAシリーズの装置を用いて、変性SBRの構造同定を行った。測定結果から、変性SBR中のビニル含量及びスチレン含有量を算出した。
NR:TSR20
BR1:ランクセス(株)製のCB25(Nd系触媒を用いて合成したハイシスBR、Tg:-110℃)
BR2:ランクセス(株)製のCB29 TDAE(Nd系触媒を用いて合成したハイシス油展BR、ゴム成分100質量部に対してTDAEを37.5質量部含有)
BR3:宇部興産(株)製のウベポールBR150B(Co系触媒を用いて合成したハイシスBR)
SBR:共重合体製造例1で作製した変性SBR
カーボンブラック1:コロンビアカーボン(株)製のHP160(N2SA:165m2/g)
カーボンブラック2:キャボットジャパン製のショウブラックN220(N2SA:111m2/g)
シリカ1:Evonik社製のULTRASIL VN3(N2SA:175m2/g)
シリカ2:Evonik社製のULTRASIL U360(N2SA:50m2/g)
無機補強剤1:住友化学(株)製のATH#B(水酸化アルミニウム)の乾式粉砕品(平均粒子径:0.15μm、N2SA:130m2/g、モース硬度:3、熱分解物(アルミナ)のモース硬度:9)
無機補強剤2:ATH#Bの乾式粉砕品(平均粒子径:0.21μm、N2SA:95m2/g、モース硬度:3、熱分解物(アルミナ)のモース硬度:9)
無機補強剤3:ATH#Bの乾式粉砕品(平均粒子径:0.25μm、N2SA:75m2/g、モース硬度:3、熱分解物(アルミナ)のモース硬度:9)
無機補強剤4:ATH#Bの乾式粉砕品(平均粒子径:0.4μm、N2SA:35m2/g、モース硬度:3、熱分解物(アルミナ)のモース硬度:9)
無機補強剤5:ATH#B(平均粒子径:0.6μm、N2SA:15m2/g、モース硬度:3、熱分解物(アルミナ)のモース硬度:9)
無機補強剤6:住友化学(株)製のATH#C(水酸化アルミニウム、平均粒子径:0.8μm、N2SA:7.0m2/g、モース硬度:3、熱分解物(アルミナ)のモース硬度:9)
無機補強剤7:住友化学(株)製のC-301N(水酸化アルミニウム、平均粒子径:1.0μm、N2SA:4.0m2/g、モース硬度:3、熱分解物(アルミナ)のモース硬度:9)
無機補強剤8:住友化学(株)製のC-303(水酸化アルミニウム、平均粒子径:3.1μm、N2SA:2.0m2/g、モース硬度:3、熱分解物(アルミナ)のモース硬度:9)
無機補強剤9:ATH#Cのメンブレンフィルター法による分取品(平均粒子径:0.67μm、N2SA:47m2/g、モース硬度:3、熱分解物(アルミナ)のモース硬度:9)
無機補強剤10:戸田工業(株)製の湿式合成品(水酸化アルミニウム、平均粒子径:測定不可、N2SA:274m2/g、モース硬度:3、熱分解物(アルミナ)のモース硬度:9)
無機補強剤11:戸田工業(株)製の湿式合成品(水酸化アルミニウム、平均粒子径:測定不可、N2SA:170m2/g、モース硬度:3、熱分解物(アルミナ)のモース硬度:9)
クマロンインデン樹脂1:Rutgers Chemicals社製のNOVARES C10(液状クマロンインデン樹脂、軟化点:10℃)
クマロンインデン樹脂2:Rutgers Chemicals社製のNOVARES C30(クマロンインデン樹脂、軟化点:30℃)
クマロンインデン樹脂3:Rutgers Chemicals社製のNOVARES C50(クマロンインデン樹脂、軟化点:50℃)
クマロンインデン樹脂4:Rutgers Chemicals社製のNOVARES C10のゲル浸透クロマトグラフィー(GPC)分取品(低分子量成分主体、軟化点:-22℃)
テルペン系樹脂1:ヤスハラケミカル(株)製のYSポリスターT160(軟化点:160℃、テルペンフェノール樹脂)
テルペン系樹脂2:ヤスハラケミカル(株)製のYSポリスターT115(軟化点:115℃、テルペンフェノール樹脂)
テルペン系樹脂3:ヤスハラケミカル(株)製のYSレジンPX1150N(軟化点:115℃、β-ピネン樹脂)
テルペン系樹脂4:ヤスハラケミカル(株)製のYSレジンPX800(軟化点:80℃、β-ピネン樹脂)
テルペン系樹脂5:ヤスハラケミカル(株)製のYSポリスターT180(軟化点:180℃、テルペンフェノール樹脂、試作品)
スチレン系樹脂:アリゾナケミカル社製のSylvares SA85(軟化点:85℃)
オイル1:ジャパンエナジー社製のプロセスP-200
オイル2:H&R社製のVivatec500
ワックス:日本精鑞(株)製のOzoace0355
老化防止剤1:住友化学(株)製のアンチゲン6C(N-(1,3-ジメチルブチル)-N’-フェニル-p-フェニレンジアミン)
老化防止剤2:大内新興化学(株)製のノクラック224(2,2,4-トリメチル-1,2-ジヒドロキノリン重合体)
ステアリン酸:日油(株)製のステアリン酸「椿」
酸化亜鉛:東邦亜鉛(株)製の銀嶺R(平均粒子径:0.29μm、N2SA:4m2/g)
シランカップリング剤1:Evonik社製のSi75
シランカップリング剤2:モメンティブ・パフォーマンス・マテリアルズ社製のNXT(上記式(I)で表されるシランカップリング剤において、p=2、q=3、k=7の化合物)
硫黄:細井化学工業(株)製のHK-200-5(5質量%オイル含有粉末硫黄)
加硫促進剤1:大内新興化学工業(株)製のノクセラーNS-G(N-tert-ブチル-2-ベンゾチアゾリルスルフェンアミド)
加硫促進剤2:大内新興化学工業(株)製のノクセラーD(1,3-ジフェニルグアニジン)
表1のサマータイヤ、表2のスタッドレスタイヤに示す配合内容及び混練条件に従い、バンバリーミキサーを用いて、まず、ゴム成分と、カーボンブラック全量と、シリカ2/3量と、シランカップリング剤2/3量とを5分間混練り(X練り)する。
次いで、前記X練りにて混練した混練物と、残りのシリカと、残りのシランカップリング剤とを混練し、硫黄及び加硫促進剤以外のその他の成分を混練して、更に5分間混練り(Y練り)する。
Y練りで混練した混練物を再度4分間混練り(Z練り)する(サマータイヤのみZ練りを行った)。
次に、得られた混練り物に硫黄及び加硫促進剤を添加し、オープンロールを用いて、4分間練り込み(仕上げ練り)、未加硫ゴム組成物を得た。
得られた未加硫ゴム組成物を170℃の条件下で12分間プレス加硫し、加硫ゴム組成物を得た。
また、得られた未加硫ゴム組成物をトレッドの形状に成形し、タイヤ成型機上で他のタイヤ部材とともに貼り合わせ、170℃の条件下で12分間プレス加硫し、試験用タイヤ(タイヤサイズ:245/40R18)を得た。
なお、アルミナ及び水酸化アルミニウムの添加は、表1又は2に記載の時期に投入した。
上記試験用タイヤを排気量2000ccの国産FR車に装着し、ウェットアスファルト路面のテストコースにて10周の実車走行を行った。その際における、操舵時のコントロールの安定性をテストドライバーが評価し、比較例1及び11を100として指数表示をした。指数が大きいほどウェットグリップ性能に優れることを示す。指数110以上の場合、ウェットグリップ性能が良好である。
上記試験用タイヤを排気量2000ccの国産FR車に装着し、ドライアスファルト路面のテストコースにて実車走行を行った。その際におけるタイヤトレッドゴムの残溝量を計測し(新品時8.0mm)、耐摩耗性として評価した。残溝量が多いほど、耐摩耗性に優れる。比較例1及び11の残溝量を100として指数表示した。指数が大きいほど、耐摩耗性に優れることを示す。
加硫ゴム組成物からなる3号ダンベル型試験片を用いて、JIS K 6251「加硫ゴム及び熱可塑性ゴム-引張特性の求め方」に準じて、25℃にて引張試験を実施し、破断時伸びEB(%)を測定し、比較例1及び11のEBを100として指数表示した。EBが大きいほど、破断時伸びに優れることを示す。
Claims (7)
- ゴム成分と、下記式で表され、かつ平均粒子径1.5μm以下、窒素吸着比表面積3~120m2/gの無機補強剤と、湿式シリカと、軟化点-20~45℃のクマロンインデン樹脂及び/又は軟化点100~170℃のテルペン系樹脂とを含み、
前記ゴム成分100質量部に対して、前記無機補強剤の含有量が1~60質量部であるタイヤ用ゴム組成物を用いて作製したトレッドを有する空気入りタイヤ。
kM1・xSiOy・zH2O
(式中、M1はAl、Mg、Ti、Ca及びZrからなる群より選ばれた少なくとも1種の金属、該金属の酸化物又は水酸化物であり、kは1~5の整数、xは0~10の整数、yは2~5の整数、zは0~10の整数である。) - 前記無機補強剤は、平均粒子径0.69μm以下及び窒素吸着比表面積10~50m2/gであり、
前記湿式シリカは、窒素吸着比表面積が80~300m2/gでかつ、その含有量が前記ゴム成分100質量部に対して15~130質量部である請求項1記載の空気入りタイヤ。 - 前記ゴム成分100質量部に対して、前記クマロンインデン樹脂の含有量は0.5~60質量部である請求項1又は2記載の空気入りタイヤ。
- 前記ゴム成分100質量部に対して、前記テルペン系樹脂の含有量は1~40質量部である請求項1~3のいずれかに記載の空気入りタイヤ。
- 前記ゴム成分100質量%中、希土類元素系触媒を用いて合成されたブタジエンゴムを9~70質量%含む請求項1~4のいずれかに記載の空気入りタイヤ。
- 前記無機補強剤が水酸化アルミニウムで、かつ
少なくとも前記ゴム成分及び前記水酸化アルミニウムを排出温度150℃以上で混練して得られる請求項1~5のいずれかに記載の空気入りタイヤ。 - 前記排出温度160℃以上で混練して得られる請求項6記載の空気入りタイヤ。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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CN201480070744.9A CN105849174B (zh) | 2014-01-07 | 2014-12-15 | 充气轮胎 |
JP2015556748A JP6055118B2 (ja) | 2014-01-07 | 2014-12-15 | 空気入りタイヤ |
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JP2017031409A (ja) * | 2015-08-05 | 2017-02-09 | ザ・グッドイヤー・タイヤ・アンド・ラバー・カンパニーThe Goodyear Tire & Rubber Company | 空気入りタイヤ |
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Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000143877A (ja) * | 1998-11-16 | 2000-05-26 | Bayer Ag | スチレン―ブタジエンゴム及びブタジエンゴムを含有する加硫可能なゴム配合物 |
JP2006274010A (ja) | 2005-03-29 | 2006-10-12 | Asahi Kasei Chemicals Corp | 変性共役ジエン系重合体の製造法 |
JP2006306962A (ja) | 2005-04-27 | 2006-11-09 | Asahi Kasei Chemicals Corp | 変性重合体組成物 |
JP2009503167A (ja) * | 2005-07-29 | 2009-01-29 | ピレリ・タイヤ・ソチエタ・ペル・アツィオーニ | 高性能タイヤ、トレッドバンドおよび架橋性エラストマー組成物 |
JP2009227858A (ja) | 2008-03-24 | 2009-10-08 | Asahi Kasei Chemicals Corp | 変性共役ジエン系重合体及びその製造方法、並びに重合体組成物 |
JP2009275178A (ja) | 2008-05-16 | 2009-11-26 | Asahi Kasei Chemicals Corp | 変性共役ジエン系重合体組成物及びこれを用いた加硫ゴム組成物 |
JP2010077412A (ja) | 2008-08-27 | 2010-04-08 | Sumitomo Chemical Co Ltd | 共役ジエン系重合体、共役ジエン系重合体組成物及び共役ジエン系重合体の製造方法 |
JP4559573B2 (ja) | 1999-12-27 | 2010-10-06 | 住友ゴム工業株式会社 | トレッドゴム組成物およびそれを用いた空気入りタイヤ |
JP2012255076A (ja) * | 2011-06-08 | 2012-12-27 | Sumitomo Rubber Ind Ltd | ゴム組成物及び空気入りタイヤ |
JP2013014708A (ja) * | 2011-07-05 | 2013-01-24 | Sumitomo Rubber Ind Ltd | ゴム組成物及び空気入りタイヤ |
JP2013071938A (ja) * | 2011-09-26 | 2013-04-22 | Sumitomo Rubber Ind Ltd | タイヤ用ゴム組成物及び空気入りタイヤ |
JP2013147617A (ja) * | 2012-01-23 | 2013-08-01 | Bridgestone Corp | ゴム組成物およびそれを用いた空気入りタイヤ |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100351276C (zh) * | 1999-09-27 | 2007-11-28 | 旭化成株式会社 | 二烯类橡胶状聚合物的制造方法 |
JP5456623B2 (ja) * | 2010-08-31 | 2014-04-02 | 本田技研工業株式会社 | 充電器 |
JP2012116983A (ja) * | 2010-12-02 | 2012-06-21 | Sumitomo Rubber Ind Ltd | トレッド用ゴム組成物及び競技用タイヤ |
JP5654362B2 (ja) * | 2011-01-11 | 2015-01-14 | 住友ゴム工業株式会社 | タイヤ用ゴム組成物及び空気入りタイヤ |
JP5650690B2 (ja) * | 2012-06-12 | 2015-01-07 | 住友ゴム工業株式会社 | トレッド用ゴム組成物及び空気入りタイヤ |
JP5913188B2 (ja) * | 2013-04-30 | 2016-04-27 | 住友ゴム工業株式会社 | タイヤ用ゴム組成物及び空気入りタイヤ |
EP2985311B1 (en) * | 2013-04-30 | 2020-09-23 | Sumitomo Rubber Industries, Ltd. | Tire rubber composition and pneumatic tire |
JP6215959B2 (ja) * | 2013-11-20 | 2017-10-18 | 住友ゴム工業株式会社 | 冬用タイヤ |
-
2014
- 2014-12-15 EP EP14877979.6A patent/EP3081587B1/en active Active
- 2014-12-15 CN CN201480070744.9A patent/CN105849174B/zh active Active
- 2014-12-15 WO PCT/JP2014/083127 patent/WO2015104955A1/ja active Application Filing
- 2014-12-15 JP JP2015556748A patent/JP6055118B2/ja active Active
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000143877A (ja) * | 1998-11-16 | 2000-05-26 | Bayer Ag | スチレン―ブタジエンゴム及びブタジエンゴムを含有する加硫可能なゴム配合物 |
JP4559573B2 (ja) | 1999-12-27 | 2010-10-06 | 住友ゴム工業株式会社 | トレッドゴム組成物およびそれを用いた空気入りタイヤ |
JP2006274010A (ja) | 2005-03-29 | 2006-10-12 | Asahi Kasei Chemicals Corp | 変性共役ジエン系重合体の製造法 |
JP2006306962A (ja) | 2005-04-27 | 2006-11-09 | Asahi Kasei Chemicals Corp | 変性重合体組成物 |
JP2009503167A (ja) * | 2005-07-29 | 2009-01-29 | ピレリ・タイヤ・ソチエタ・ペル・アツィオーニ | 高性能タイヤ、トレッドバンドおよび架橋性エラストマー組成物 |
JP2009227858A (ja) | 2008-03-24 | 2009-10-08 | Asahi Kasei Chemicals Corp | 変性共役ジエン系重合体及びその製造方法、並びに重合体組成物 |
JP2009275178A (ja) | 2008-05-16 | 2009-11-26 | Asahi Kasei Chemicals Corp | 変性共役ジエン系重合体組成物及びこれを用いた加硫ゴム組成物 |
JP2010077412A (ja) | 2008-08-27 | 2010-04-08 | Sumitomo Chemical Co Ltd | 共役ジエン系重合体、共役ジエン系重合体組成物及び共役ジエン系重合体の製造方法 |
JP2012255076A (ja) * | 2011-06-08 | 2012-12-27 | Sumitomo Rubber Ind Ltd | ゴム組成物及び空気入りタイヤ |
JP2013014708A (ja) * | 2011-07-05 | 2013-01-24 | Sumitomo Rubber Ind Ltd | ゴム組成物及び空気入りタイヤ |
JP2013071938A (ja) * | 2011-09-26 | 2013-04-22 | Sumitomo Rubber Ind Ltd | タイヤ用ゴム組成物及び空気入りタイヤ |
JP2013147617A (ja) * | 2012-01-23 | 2013-08-01 | Bridgestone Corp | ゴム組成物およびそれを用いた空気入りタイヤ |
Non-Patent Citations (1)
Title |
---|
See also references of EP3081587A4 |
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JP2017101142A (ja) * | 2015-12-01 | 2017-06-08 | 住友ゴム工業株式会社 | 空気入りタイヤ |
JP2017197715A (ja) * | 2016-02-15 | 2017-11-02 | ザ・グッドイヤー・タイヤ・アンド・ラバー・カンパニー | 低温性能及びウェットトラクションのためのトレッドを有するタイヤ |
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JP2017193622A (ja) * | 2016-04-20 | 2017-10-26 | 住友ゴム工業株式会社 | タイヤ |
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EP3081587A4 (en) | 2017-07-05 |
JP6055118B2 (ja) | 2016-12-27 |
JPWO2015104955A1 (ja) | 2017-03-23 |
EP3081587B1 (en) | 2022-06-08 |
CN105849174A (zh) | 2016-08-10 |
EP3081587A1 (en) | 2016-10-19 |
CN105849174B (zh) | 2018-08-17 |
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