WO2014178232A1 - タイヤ用ゴム組成物及び空気入りタイヤ - Google Patents
タイヤ用ゴム組成物及び空気入りタイヤ Download PDFInfo
- Publication number
- WO2014178232A1 WO2014178232A1 PCT/JP2014/056627 JP2014056627W WO2014178232A1 WO 2014178232 A1 WO2014178232 A1 WO 2014178232A1 JP 2014056627 W JP2014056627 W JP 2014056627W WO 2014178232 A1 WO2014178232 A1 WO 2014178232A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mass
- tire
- rubber
- rubber composition
- less
- Prior art date
Links
Images
Classifications
-
- 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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
- B60C1/0016—Compositions of the tread
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L21/00—Compositions of unspecified rubbers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L7/00—Compositions of natural rubber
-
- 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
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
-
- 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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2244—Oxides; Hydroxides of metals of zirconium
Definitions
- the present invention relates to a rubber composition for a tire, and a pneumatic tire having a tread made using the rubber composition.
- 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 the addition of aluminum hydroxide has been proposed, but the wear resistance is said to be deteriorated Due to its drawbacks, it is rarely used for tires for general public roads. There is also a problem in the processability of the compounding material.
- 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, but a further improvement is It is required.
- Patent No. 4559573 gazette
- An object of the present invention is to solve the above-mentioned problems and to provide a rubber composition for a tire having well-balancedly improved wet grip performance, wear resistance and roll processability, and a pneumatic tire using the same.
- the present invention contains 1 to 60 parts by mass of an inorganic reinforcing agent represented by the following formula and having an average particle diameter of 0.69 ⁇ m or less and a nitrogen adsorption specific surface area of 10 to 50 m 2 / g with respect to 100 parts by mass of a rubber component
- the present invention relates to a rubber composition for tires.
- kM 1 ⁇ x SiO y ⁇ z H 2 O (Wherein, 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 preferably has a Mohs hardness of less than 7 and a thermal decomposition product of the inorganic reinforcing agent having a Mohs hardness of 8 or more.
- the inorganic reinforcing agent preferably has a solubility in pure water at 25 ° C. of 5 mg / 100 cm 3 or less.
- the diene rubber is contained in an amount of 30% by mass or more in 100% by mass of the rubber component, and the inorganic reinforcing agent is aluminum hydroxide.
- the present invention also relates to a pneumatic tire having a tread made using the rubber composition for a tire.
- the present invention since it is a rubber composition for a tire, it is a rubber composition for a tire, in which a predetermined amount of an inorganic reinforcing agent represented by a specific formula and having a specific average particle diameter and a specific surface area for nitrogen adsorption is blended. Performance, abrasion resistance and roll processability can be improved in a well-balanced manner.
- FIG. 2 is a schematic view showing an instantaneous reaction that occurs between aluminum hydroxide on the tire surface and silica on a road surface, or a bond that occurs between silica and aluminum hydroxide during kneading.
- the rubber composition for a tire according to the present invention is obtained by blending a predetermined amount of an inorganic reinforcing agent represented by a specific formula and having a specific average particle diameter and a nitrogen adsorption specific surface area with respect to 100 parts by mass of a rubber component.
- medical agents such as an inorganic reinforcing agent mix
- the theoretical compounding amount means the amount of the chemical added when preparing the unvulcanized rubber composition.
- 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 roll processability generally deteriorate, so it is desirable to improve them in a well-balanced manner. difficult.
- 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 in wear resistance and roll processability, and maintains good performance. While the wet grip performance is improved, these performances can be improved in a well-balanced manner. Furthermore, when a rare earth butadiene rubber is used as the rubber component, the abrasion resistance is remarkably improved, and the performance balance can be further 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 compounding amount of the diene rubber in 100% by mass of the rubber component is preferably 30% by mass or more, more preferably 70% by mass or more, from the viewpoint that the effect of the present invention is favorably obtained. More preferably, it is 80 mass% or more, and 100 mass% may be sufficient.
- the blending amount of BR in 100% by mass of the rubber component is preferably 10% by mass or more, more preferably 20% by mass or more.
- the compounding amount is preferably 80% by mass or less, more preferably 75% by mass or less, and still more preferably 70% by mass or less. If it exceeds 80% by mass, chipping properties and wet grip performance may be inferior. In the combination aiming at high dry grip performance, it is good to use SBR / NR combination system, and it is not necessary to blend BR.
- the compounding amount 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 further preferably 30% by mass or more.
- the upper limit of the compounding amount is not particularly limited, and may be 100% by mass, 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 compounding amount of BR in 100% by mass of the rubber component is preferably 30% by mass or more, more preferably 40% by mass or more, still more preferably 50% by mass or more.
- the compounding amount is preferably 90% by mass or less, more preferably 80% by mass or less, and still more preferably 70% by mass or less. If it is less than 30% by mass, the low temperature grip performance (performance on ice, wet grip performance) may be inferior, and if it exceeds 90% by mass, the dry grip performance or (roll) processability may be inferior.
- the compounding amount 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 compounding amount 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 (roll) 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 of the present invention is represented by the following formula, and is blended with an inorganic reinforcing agent 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 size of the inorganic reinforcing agent is 0.69 ⁇ m or less, preferably 0.20 to 0.65 ⁇ m, and more preferably 0.25 to 0.60 ⁇ m. If it exceeds 0.69 ⁇ m, abrasion resistance and wet grip performance may be degraded.
- 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 10 to 50 m 2 / g.
- the lower limit of the N 2 SA is preferably 12 m 2 / g or more, more preferably 14 m 2 / g or more, and the upper limit is preferably 45 m 2 / g or less, more preferably 40 m 2 / g or less
- the inorganic reinforcing agent N 2 SA is a value measured by the BET method according to ASTM D3037-81.
- 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 preferably has a solubility in pure water at 25 ° C. of 5 mg / 100 cm 3 or less in that it exerts constant performance under all weather conditions. If the mineral dissolves or absorbs water, the rubber composition may not function.
- the solubility is a mass (g) dissolved in 100 g of pure water at 25 ° C., and can be conveniently measured.
- 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 compounding amount 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. In addition, 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.
- carbon black and / or silica may be blended in addition to the above-mentioned inorganic reinforcing agent, and in particular, silica is blended in terms of the performance balance between wet grip performance and abrasion resistance. preferable.
- silica is blended in terms of the performance balance between wet grip performance and abrasion resistance.
- a dry method silica anhydrous silicic acid
- a wet method silica hydrosilicic acid
- a wet method silica is preferable from the reason of having many silanol groups.
- the N 2 SA of silica is preferably 40 m 2 / g or more, more preferably 80 m 2 / g or more, and still more preferably 110 m 2 / g or more. Further, the N 2 SA is preferably 350 m 2 / g or less, more preferably 250 m 2 / g or less. The effect of this invention can fully be exhibited as it is in the said range.
- the N 2 SA of silica is measured by the same method as the inorganic reinforcing agent.
- the compounding amount of silica is preferably 20 parts by mass or more, more preferably 30 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 20 parts by mass, sufficient abrasion resistance and wet grip performance may not be obtained. In addition, the compounding amount is preferably 130 parts by mass or less, more preferably 125 parts by mass or less, and still more preferably 120 parts by mass or less. If the amount is more than 130 parts by mass, fuel economy may be reduced.
- the compounding amount of silica is preferably 30 to 130 parts by mass, more preferably 35 to 125 parts by mass with respect to 100 parts by mass of the rubber component.
- the blending amount of silica is preferably 20 to 100 parts by mass, more preferably 25 to 95 parts by mass with respect to 100 parts by mass of the rubber component.
- the N 2 SA of carbon black is preferably 40 m 2 / g or more, more preferably 60 m 2 / g or more, and still more preferably 100 m 2 / g or more.
- the N 2 SA is preferably 250 m 2 / g or less, more preferably 200 m 2 / g or less. The effect of this invention can fully be exhibited as it is in the said range.
- the blending amount may be appropriately set according to the required performance of the tread such as wet grip performance and abrasion resistance, but the total blending amount thereof is 100 parts by mass of the rubber component. In contrast, it is preferably 30 to 180 parts by mass, more preferably 45 to 135 parts by mass. In particular, in the case of the rubber composition for summer tires, the total blending amount is preferably 50 to 160 parts by mass, more preferably 65 to 130 parts by mass with respect to 100 parts by mass of the rubber component. On the other hand, in the case of a studless tire, the compounding amount of silica is preferably 35 to 140 parts by mass, more preferably 50 to 110 parts by mass with respect to 100 parts by mass of the rubber component.
- a resin in order to improve the wet grip performance, in the rubber composition for summer tires (containing SBR), a resin may be blended as a softener, and as the resin, C5 petroleum resin, C9 petroleum resin Resins such as terpene resins, coumarone indene resins, and aromatic vinyl polymers can be used. Among them, terpene resins, coumarone indene resins, aromatic vinyl polymers and the like are preferable. It is preferable to mix
- the terpene resin, terpene resin, aromatic terpene resin, terpene phenol resin, etc. can be used, and one having a solubility parameter value (SP value) of 8.6 or less and a softening point of 106 to 160 ° C. is preferable. It is more preferable that the temperature is 106 to 124 ° C.
- aromatic vinyl polymer styrene and ⁇ -methylstyrene are used as the aromatic vinyl monomer (unit), and either a homopolymer of each monomer or a copolymer of both monomers is used. Good.
- aromatic vinyl polymer a homopolymer of ⁇ -methylstyrene or styrene or a copolymer of ⁇ -methylstyrene and styrene is preferable because it is economical, easy to process, and excellent in wet skid performance.
- a copolymer of ⁇ -methylstyrene and styrene or a homopolymer of styrene is more preferable.
- the softening point (Softening Point) of the above-mentioned aromatic vinyl polymer is preferably 100 ° C. or less, more preferably 92 ° C. or less, still more preferably 88 ° C. or less, preferably 30 ° C. or more, more preferably 60 ° C.
- the temperature is more preferably 75 ° C. or more. Within the above range, good wet grip performance can be obtained, and the performance balance can be improved.
- the softening point is a temperature at which the softening point defined in JIS K 6220 is measured by a ring and ball type softening point measuring device, and the sphere is lowered.
- the weight average molecular weight (Mw) of the aromatic vinyl polymer is preferably 400 or more, more preferably 500 or more, still more preferably 800 or more, and preferably 10000 or less, more preferably 3000 or less, still more preferably It is 2000 or less. Within the above range, the effects of the present invention can be favorably obtained. In addition, in this specification, a weight average molecular weight is calculated
- GPC gel permeation chromatograph
- the compounding amount of the resin is preferably 2 parts by mass or more, more preferably 5 parts by mass or more, with respect to 100 parts by mass of the rubber component. If the amount is less than 2 parts by mass, the effect of the addition may not be sufficiently obtained. Further, the compounding amount is preferably 50 parts by mass or less, more preferably 25 parts by mass or less. If it exceeds 50 parts by mass, the abrasion resistance tends to deteriorate.
- the rubber composition of the present invention is preferably blended with a processing aid.
- a processing aid for example, the dispersibility of the filler (in particular, silica) and the diene rubber gel can be improved, and the wet grip performance, the wear resistance and the roll processability can be improved.
- processing aids include fatty acid metal salts, fatty acid amides, amide esters, silica surfactants, fatty acid esters, mixtures of fatty acid metal salts and amide esters, and mixtures of fatty acid metal salts and fatty acid amides. These may be used alone or in combination of two or more. Among them, fatty acid metal salts, amide esters, and mixtures of fatty acid metal salts and amide esters or fatty acid amides are preferable, and mixtures of fatty acid metal salts and fatty acid amides are particularly preferable.
- the fatty acid that constitutes the fatty acid metal salt is not particularly limited, but may be saturated or unsaturated fatty acid (preferably having 6 to 28 carbon atoms (more preferably 10 to 25 carbon atoms, still more preferably 14 to 20 carbon atoms) or saturated Unsaturated fatty acids), and examples thereof include lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, linoleic acid, linolenic acid, arachidic acid, behenic acid, nervonic acid and the like. These can be used 1 type or in mixture of 2 or more types. Among them, saturated fatty acids are preferable, and saturated fatty acids having 14 to 20 carbon atoms are more preferable.
- Examples of the metal constituting the fatty acid metal salt include alkali metals such as potassium and sodium, alkaline earth metals such as magnesium, calcium and barium, zinc, nickel and molybdenum. Among them, zinc and calcium are preferable, and zinc is more preferable.
- the fatty acid amide may be a saturated fatty acid amide or an unsaturated fatty acid amide.
- saturated fatty acid amides include N- (1-oxooctadecyl) sarcosine, stearic acid amide, behenic acid amide and the like.
- unsaturated fatty acid amides include oleic acid amide and erucic acid amide.
- WB16 manufactured by Straktor Co., Ltd. which is a mixture of calcium fatty acid and fatty acid amide, and the like can be mentioned.
- the compounding amount of the processing aid is preferably 0.3 parts by mass or more, more preferably 0.5 parts by mass or more, with respect to 100 parts by mass of the rubber component. If the amount is less than 0.3 parts by mass, the effect of the addition may not be sufficiently obtained.
- the content is preferably 15 parts by mass or less, more preferably 10 parts by mass or less. If it exceeds 15 parts by mass, the abrasion resistance tends to deteriorate.
- compounding agents generally used in the tire industry for example, silane coupling agents, oils, waxes, zinc oxide, antioxidants, sulfur and the like are added.
- Materials such as a vulcanizing agent and a vulcanization accelerator may be appropriately blended.
- the silane coupling agent represented by following formula (I) can be used.
- blending the silane coupling agent represented by following formula (I) with the said conjugated diene type polymer and a silica 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.
- silane coupling agents for example, sulfides such as bis (3-triethoxysilylpropyl) disulfide, mercaptos such as 3-mercaptopropyltrimethoxysilane, vinyls such as vinyltriethoxysilane, 3- Amino type such as aminopropyltriethoxysilane, glycidoxy type of ⁇ -glycidoxypropyltriethoxysilane, nitro type such as 3-nitropropyltrimethoxysilane, chloro type such as 3-chloropropyltrimethoxysilane, etc. .
- sulfides are preferred. Examples of commercially available products include NXT-Z45 manufactured by Momentive, and Si69 and Si75 manufactured by EVONIK-DEGUSSA.
- the above silane coupling agents may be used alone or in combination of two or more.
- the rubber composition of the present invention can be produced by a conventionally known method such as the following method.
- the rubber composition of the present invention can be used for each component of a tire, and can be suitably used for a tread.
- 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 BR: CB25 (High cis BR synthesized using Nd catalyst, manufactured by LANXESS Co., Ltd., Tg: -110 ° C)
- 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 Ltd.
- Silica ULTRASIL VN3 manufactured by Evonik (N 2 SA: 175 m 2 / g) Rod-like silica: PANGEL manufactured by TOLSA (average particle size: 2 ⁇ m, N 2 SA: 320 m 2 / g) Diatomaceous earth: CelTix (average particle size: 1.5 ⁇ m, N 2 SA: 27 m 2 / g) manufactured by IMERYS
- Aluminum hydroxide 1 Dry ground product of ATH # B (average particle size: 0.21 ⁇ m, N 2 SA: 55 m 2 / g, Mohs hardness: 3, Mohs hardness of thermal decomposition product (alumina): 9, thermal decomposition start Temperature: 200 ° C, solubility (25 ° C): substantially non-dissolving)
- Aluminum hydroxide 2 dry ground product of ATH # B (average particle size: 0.25 ⁇ m, N 2 SA: 45 m 2 / g, Mohs hardness: 3, Mohs hardness of thermal de
- Thermal decomposition onset temperature 200 ° C, solubility (25 ° C): substantially non-dissolving)
- Aluminum hydroxide 5 ATH # C (average particle size: 0.8 ⁇ m, N 2 SA: 7.0 m 2 / g, Mohs hardness: 3, Mohs hardness of thermal decomposition product (alumina) manufactured by Sumitomo Chemical Co., Ltd .: 9, thermal decomposition onset temperature: 200 ° C, solubility (25 ° C): substantially non-dissolving)
- Aluminum hydroxide 6 Hideite H-43 (average particle size: 0.75 ⁇ m, N 2 SA: 6.7 m 2 / g, Morse hardness: 3, Morse of pyrolyzate (alumina) manufactured by Showa Denko KK) Hardness: 9, thermal decomposition onset temperature: 200 ° C, solubility (25 ° C): substantially non-dissolving)
- Aluminum hydroxide 7 C-301N (average particle size
- Zirconium oxide 1 SPZ zirconium oxide (average particle size: 2.0 ⁇ m, N 2 SA: 4 m 2 / g, Mohs hardness: 7, solubility (25 ° C.): non-dissolving) manufactured by Daiichi Kigenso Kagaku Kogyo Co., Ltd.
- Zirconium oxide 2 TMZ zirconium oxide (average particle size: 1.1 ⁇ m, N 2 SA: 5 m 2 / g, Mohs hardness: 7, solubility (25 ° C.): non-dissolving) manufactured by Daiichi Kigenso Kagaku Kogyo Co., Ltd.
- Zirconium oxide 3 UEP-100 (average particle size: 0.28 ⁇ m, N 2 SA: 50 m 2 / g, Mohs hardness: 7, solubility (25 ° C.): non-dissolving) manufactured by Daiichi Kigenso Kagaku Kogyo Co., Ltd.
- Zirconium oxide 4 UEP zirconium oxide (average particle size: 0.55 ⁇ m, N 2 SA: 25 m 2 / g, Mohs hardness: 7, Solubility (25 ° C.) manufactured by Daiichi Kigenso Kagaku Kogyo Co., Ltd .: Not dissolved)
- Calcium carbonate 1 Tanka 200 (average particle size: 2.7 ⁇ m, N 2 SA: 1.1 m 2 / g) manufactured by Takehara Chemical Industry Co., Ltd.
- Magnesium hydroxide Magnesium hydroxide manufactured by Wako Pure Chemical Industries, Ltd. 0.6 ⁇ m (average particle size: 0.6 ⁇ m, N 2 SA: 14 m 2 / g, Mohs hardness: 2.5, solubility (25 ° C.): 1.2 mg, thermal decomposition start temperature: 350 ° C)
- Sodium sulfate Sodium sulfate first grade (dry ground product) manufactured by Wako Pure Chemical Industries, Ltd.
- Zinc flower Ginkgo R manufactured by Toho Zinc Co., Ltd.
- Resin 1 (grip resin 1): SYLVARES SA 85 (copolymer of ⁇ -methylstyrene and styrene, softening point: 85 ° C., Mw: 1000) manufactured by Arizona chemical Resin 2 (grip resin 2): SYLVARES TP 115 (terpene phenol resin, softening point: 115 ° C.) manufactured by Arizona chemical Resin 3 (grip resin 3): NOVARES C10 (liquid coumarone-indene resin, softening point: 10 ° C.) manufactured by Rutgers Chemicals Oil 1: Dana Process PA-32 (mineral oil) manufactured by JX Nippon Oil & Energy Corporation Oil 2: V &V's Vivatec 500 (TDAE) 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 Industry Co., Ltd.
- 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 composition shown in the summer tire of Table 1 and the studless tire of Table 2, using the Banbury mixer, first, the total amount of rubber component and carbon black, silica and silane coupling agent are mixed for 5 minutes at 150 ° C. The mixture was then kneaded, and then the remaining materials other than sulfur and the vulcanization accelerator were kneaded for 4 minutes under the condition of 150 ° C. to obtain a kneaded product (base kneading step). Next, sulfur and a vulcanization accelerator were added to the obtained kneaded product, and kneaded for 4 minutes under the condition of 105 ° C.
- the obtained unvulcanized rubber composition was press-cured for 12 minutes at 170 ° C. to obtain a vulcanized rubber composition. Further, 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.
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Tires In General (AREA)
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。)
(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。)
先ず、バンバリーミキサー、オープンロールなどのゴム混練装置に硫黄及び加硫促進剤以外の成分を配合(添加)して混練りした後(ベース練り工程)、得られた混練物に、更に硫黄及び加硫促進剤を配合(添加)して混練りしその後加硫する方法などにより製造できる。
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
BR: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℃)
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(株)製のショウブラックN220(N2SA:111m2/g)
シリカ:Evonik社製のULTRASIL VN3(N2SA:175m2/g)
棒状シリカ:TOLSA社製のPANGEL(平均粒子径:2μm、N2SA:320m2/g)
珪藻土:IMERYS社製のCelTix(平均粒子径:1.5μm、N2SA:27m2/g)
水酸化アルミニウム1:ATH#Bの乾式粉砕品(平均粒子径:0.21μm、N2SA:55m2/g、モース硬度:3、熱分解物(アルミナ)のモース硬度:9、熱分解開始温度:200℃、溶解度(25℃):実質非溶解)
水酸化アルミニウム2:ATH#Bの乾式粉砕品(平均粒子径:0.25μm、N2SA:45m2/g、モース硬度:3、熱分解物(アルミナ)のモース硬度:9、熱分解開始温度:200℃、溶解度(25℃):実質非溶解)
水酸化アルミニウム3:ATH#Bの乾式粉砕品(平均粒子径:0.4μm、N2SA:34m2/g、モース硬度:3、熱分解物(アルミナ)のモース硬度:9、熱分解開始温度:200℃、溶解度(25℃):実質非溶解)
水酸化アルミニウム4:住友化学(株)製の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、熱分解開始温度:200℃、溶解度(25℃):実質非溶解)
水酸化アルミニウム5:住友化学(株)製のATH#C(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、熱分解開始温度:200℃、溶解度(25℃):実質非溶解)
水酸化アルミニウム6:昭和電工(株)製のハイジライトH-43(平均粒子径:0.75μm、N2SA:6.7m2/g、モース硬度:3、熱分解物(アルミナ)のモース硬度:9、熱分解開始温度:200℃、溶解度(25℃):実質非溶解)
水酸化アルミニウム7:住友化学(株)製のC-301N(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、熱分解開始温度:200℃、溶解度(25℃):実質非溶解)
水酸化アルミニウム8:ATH#Cのメンブラ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、熱分解開始温度:200℃、溶解度(25℃):実質非溶解)
水酸化アルミニウム9:ATH#Cのメンブランフィルター法による分取品(平均粒子径:0.15μm、N2SA:17m2/g、モース硬度:3、熱分解物(アルミナ)のモース硬度:9、熱分解開始温度:200℃、溶解度(25℃):実質非溶解)
アルミナ1:住友化学(株)製の60P1(平均粒子径:0.03μm、N2SA:61m2/g、モース硬度:9)
アルミナ2:住友化学(株)製の130P1(平均粒子径:0.06μm、N2SA:150m2/g、モース硬度:9)
ジルコニウム:東ソー(株)製のTZ-3YS(平均粒子径:0.7μm、N2SA:7m2/g、モース硬度:9)
酸化ジルコニウム1:第一稀元素化学工業(株)製のSPZ酸化ジルコニウム(平均粒子径:2.0μm、N2SA:4m2/g、モース硬度:7、溶解度(25℃):非溶解)
酸化ジルコニウム2:第一稀元素化学工業(株)製のTMZ酸化ジルコニウム(平均粒子径:1.1μm、N2SA:5m2/g、モース硬度:7、溶解度(25℃):非溶解)
酸化ジルコニウム3:第一稀元素化学工業(株)製のUEP-100(平均粒子径:0.28μm、N2SA:50m2/g、モース硬度:7、溶解度(25℃):非溶解)
酸化ジルコニウム4:第一稀元素化学工業(株)製のUEP酸化ジルコニウム(平均粒子径:0.55μm、N2SA:25m2/g、モース硬度:7、溶解度(25℃):
非溶解)
炭酸カルシウム1:竹原化学工業(株)製のタンカル200(平均粒子径:2.7μm、N2SA:1.1m2/g)
炭酸カルシウム2:IMERYS社製のPolcarb(平均粒子径:0.95μm、N2SA:8.4m2/g)
卵殻粉1:キューピー(株)製の卵殻粉(平均粒子径:10μm、N2SA:0.2m2/g)
卵殻粉2:キューピー(株)製の卵殻粉(平均粒子径:50μm、N2SA:0.1m2/g)
ハードクレー:IMERYS社製のHydrite 121-S(平均粒子径:1.5μm、N2SA:8m2/g)
針状酸化亜鉛:(株)アムテック製の酸化亜鉛単結晶パナテトラ(平均粒子径:20μm、N2SA:0.15m2/g)
水酸化マグネシウム:和光純薬工業(株)製の水酸化マグネシウム 0.6μm(平均粒子径:0.6μm、N2SA:14m2/g、モース硬度:2.5、溶解度(25℃):1.2mg、熱分解開始温度:350℃)
硫酸ナトリウム:和光純薬工業(株)製の硫酸ナトリウム一級(乾式粉砕品)(平均粒子径:0.6μm、N2SA:15m2/g、モース硬度:2.0、溶解度(25℃):20mg、熱分解開始温度:なし(融点884℃))
亜鉛華:東邦亜鉛(株)製の銀嶺R(平均粒子径:0.29μm、N2SA:4m2/g)
レジン1(グリップレジン1):Arizona chemical社製のSYLVARES SA85(α-メチルスチレンとスチレンとの共重合体、軟化点:85℃、Mw:1000)
レジン2(グリップレジン2):Arizona chemical社製のSYLVARES TP115(テルペンフェノール樹脂、軟化点:115℃)
レジン3(グリップレジン3):Rutgers Chemicals社製のNOVARES C10(液状クマロンインデン樹脂、軟化点:10℃)
オイル1:JX日鉱日石エネルギー(株)製のダイアナプロセスPA-32(ミネラルオイル)
オイル2:H&R社製のVivatec500(TDAE)
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:大内新興化学工業(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」
加工助剤:ストラクトール社製のWB16(脂肪酸金属塩(脂肪酸カルシウム)と脂肪酸アミドとの混合物)
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の全量と、シリカとシランカップリング剤を150℃の条件下で5分間混練りし、次に硫黄及び加硫促進剤以外の残りの材料を150℃の条件下で4分間混練りし、混練り物を得た(ベース練り工程)。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、105℃の条件下で4分間練り込み、未加硫ゴム組成物を得た(仕上げ練り工程)。
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。
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22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104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22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。指数85以上の場合、耐摩耗性が良好である。
オープンロールにおける混練工程にて、ロールに対する未加硫ゴム組成物の巻きつきなどを目視にて評価し、比較例1及び22を100として指数表示した(ロール加工性指数)。指数が大きいほど、オープンロールにおける熱入れ、混練、シーティングが円滑に進み、加工性に優れることを示す。指数90以上の場合、ロール加工性が良好である。
Claims (6)
- ゴム成分100質量部に対して、下記式で表され、かつ平均粒子径0.69μm以下、窒素吸着比表面積10~50m2/gである無機補強剤を1~60質量部配合したタイヤ用ゴム組成物。
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、モース硬度が7未満で、かつ該無機補強剤の熱分解物のモース硬度が8以上のものである請求項1記載のタイヤ用ゴム組成物。
- 前記無機補強剤は、25℃における純水への溶解度が5mg/100cm3以下である請求項1又は2記載のタイヤ用ゴム組成物。
- 前記ゴム成分100質量%中、ジエン系ゴムを30質量%以上含有し、前記無機補強剤が水酸化アルミニウムである請求項1~3のいずれかに記載のタイヤ用ゴム組成物。
- 前記ゴム成分100質量%中、スチレンブタジエンゴムを10質量%以上含有する請求項1~4のいずれかに記載のタイヤ用ゴム組成物。
- 請求項1~5のいずれかに記載の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。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201480021887.0A CN105143335B (zh) | 2013-04-30 | 2014-03-13 | 轮胎用橡胶组合物及充气轮胎 |
US14/782,165 US9796826B2 (en) | 2013-04-30 | 2014-03-13 | Tire rubber composition and pneumatic tire |
JP2014537408A JP5767753B2 (ja) | 2013-04-30 | 2014-03-13 | タイヤ用ゴム組成物及び空気入りタイヤ |
EP14792196.9A EP2985311B1 (en) | 2013-04-30 | 2014-03-13 | Tire rubber composition and pneumatic tire |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013-095532 | 2013-04-30 | ||
JP2013095532 | 2013-04-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014178232A1 true WO2014178232A1 (ja) | 2014-11-06 |
Family
ID=51843368
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2014/056627 WO2014178232A1 (ja) | 2013-04-30 | 2014-03-13 | タイヤ用ゴム組成物及び空気入りタイヤ |
Country Status (5)
Country | Link |
---|---|
US (1) | US9796826B2 (ja) |
EP (1) | EP2985311B1 (ja) |
JP (1) | JP5767753B2 (ja) |
CN (1) | CN105143335B (ja) |
WO (1) | WO2014178232A1 (ja) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015013974A (ja) * | 2013-07-08 | 2015-01-22 | 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 |
JP2015232114A (ja) * | 2014-05-15 | 2015-12-24 | 住友ゴム工業株式会社 | ゴム組成物及び空気入りタイヤ |
JP2016113051A (ja) * | 2014-12-16 | 2016-06-23 | 住友ゴム工業株式会社 | 空気入りタイヤ |
JP2017165409A (ja) * | 2017-05-10 | 2017-09-21 | 住友ゴム工業株式会社 | 空気入りタイヤ |
US20190062538A1 (en) * | 2016-05-16 | 2019-02-28 | Sumitomo Rubber Industries, Ltd. | Rubber composition |
JP2019183010A (ja) * | 2018-04-11 | 2019-10-24 | 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 |
JP2020180253A (ja) * | 2019-04-26 | 2020-11-05 | 横浜ゴム株式会社 | スタッドレスタイヤ用ゴム組成物及びスタッドレスタイヤ |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6055118B2 (ja) * | 2014-01-07 | 2016-12-27 | 住友ゴム工業株式会社 | 空気入りタイヤ |
JP7040019B2 (ja) * | 2016-07-04 | 2022-03-23 | 住友ゴム工業株式会社 | ゴム組成物 |
KR101878260B1 (ko) * | 2016-09-22 | 2018-07-13 | 금호타이어 주식회사 | 타이어 트레드용 고무 조성물 |
JP7124698B2 (ja) * | 2017-02-03 | 2022-08-24 | 住友ゴム工業株式会社 | インナーライナー用ゴム組成物及び空気入りタイヤ |
US20180327614A1 (en) * | 2017-05-09 | 2018-11-15 | Imam Abdulrahman Bin Faisal University | Method of repairing an acrylic denture base and zirconia autopolymerizable resins therof |
JP6926711B2 (ja) * | 2017-06-14 | 2021-08-25 | 住友ゴム工業株式会社 | タイヤ用ゴム組成物、トレッドおよびタイヤ |
JP7077551B2 (ja) * | 2017-09-13 | 2022-05-31 | 住友ゴム工業株式会社 | タイヤ用ゴム組成物 |
CN107602948A (zh) * | 2017-09-26 | 2018-01-19 | 正新橡胶(中国)有限公司 | 一种载重轮胎的橡胶组合物及其应用 |
DE102017223541A1 (de) * | 2017-12-21 | 2019-06-27 | Contitech Luftfedersysteme Gmbh | Artikel, insbesondere ein Luftfederbalg, ein Metall-Gummi-Element oder ein Schwingungsdämpfer |
EP3783061A4 (en) * | 2018-08-09 | 2021-07-28 | Sumitomo Rubber Industries, Ltd. | RUBBER COMPOSITION FOR PNEUMATIC, AND PNEUMATIC, TREAD |
WO2020066527A1 (ja) * | 2018-09-27 | 2020-04-02 | 住友ゴム工業株式会社 | タイヤ及びタイヤのグリップ性能の評価方法 |
EP3744776A1 (en) * | 2019-05-31 | 2020-12-02 | Sumitomo Rubber Industries, Ltd. | Rubber composition for tire |
US20230101160A1 (en) * | 2021-09-30 | 2023-03-30 | The Goodyear Tire & Rubber Company | Rubber composition and tire |
Citations (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000204197A (ja) * | 1998-11-09 | 2000-07-25 | Bridgestone Corp | タイヤトレッド用ゴム組成物 |
JP2000256506A (ja) * | 1999-03-05 | 2000-09-19 | Sumitomo Rubber Ind Ltd | ゴム組成物 |
JP2001072802A (ja) * | 1999-09-08 | 2001-03-21 | Yokohama Rubber Co Ltd:The | タイヤ用ゴム組成物 |
JP2001180929A (ja) * | 1999-12-27 | 2001-07-03 | Sumitomo Rubber Ind Ltd | 水酸化アルミニウム、それを用いてなるタイヤトレッド用ゴム組成物及びタイヤ |
JP2002030183A (ja) * | 2000-07-14 | 2002-01-31 | Sumitomo Rubber Ind Ltd | タイヤ用トレッドゴム組成物 |
JP2002080642A (ja) * | 2000-09-08 | 2002-03-19 | Sumitomo Rubber Ind Ltd | トレッド用ゴム組成物およびそれを用いたタイヤ |
JP2002097303A (ja) * | 2000-09-21 | 2002-04-02 | Sumitomo Rubber Ind Ltd | トレッド用ゴム組成物およびそれを用いたタイヤ |
JP2003501503A (ja) * | 1999-05-28 | 2003-01-14 | ソシエテ ド テクノロジー ミシュラン | ジエンエラストマー及び強化酸化チタンに基づくタイヤ用ゴム組成物 |
JP2003165871A (ja) * | 2001-11-28 | 2003-06-10 | Sumitomo Rubber Ind Ltd | タイヤ用ゴム組成物および当該ゴム組成物を用いたタイヤ |
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 |
JP2008528739A (ja) * | 2005-01-28 | 2008-07-31 | コンチネンタル アクチェンゲゼルシャフト | 車両タイヤのインナーライナー用のゴム組成物 |
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 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69726788T3 (de) * | 1996-05-16 | 2008-05-21 | Sumitomo Chemical Co. Ltd. | Aluminiumhydroxid, Verfahren zur Herstellung und Verwendung davon |
DE69813682T2 (de) * | 1997-07-11 | 2003-10-16 | Bridgestone Corp | Luftreifen |
US6656992B2 (en) | 1998-11-09 | 2003-12-02 | Bridgestone Corporation | Rubber composition |
JP4354557B2 (ja) * | 1998-12-14 | 2009-10-28 | 住友ゴム工業株式会社 | タイヤトレッド用ゴム組成物 |
DE60013750T2 (de) | 1999-12-27 | 2005-10-06 | Sumitomo Chemical Co., Ltd. | Aluminiumhydroxid, Zusammensetzung einer Reifenlauffläche und Luftreifen enthaltend Aluminiumhydroxid |
CA2352927C (en) * | 2000-07-14 | 2008-03-18 | Sumitomo Rubber Industries, Ltd. | Rubber composition for tyre tread |
ES2304234T3 (es) | 2000-09-06 | 2008-10-01 | Jsr Corporation | Material compuesto (mezcla de caucho y otras materias) inorganico basado en dienos y metodo para producir el mismo y una composiion de caucho. |
JP3686384B2 (ja) * | 2002-02-28 | 2005-08-24 | 住友ゴム工業株式会社 | トレッド用ゴム組成物およびそれを用いた空気入りタイヤ |
JP5507078B2 (ja) * | 2006-02-15 | 2014-05-28 | 株式会社ブリヂストン | タイヤサイドウォール用ゴム組成物及びタイヤ |
EP2263988B1 (en) * | 2008-04-09 | 2016-03-30 | Tosoh Corporation | Light-transmitting sintered zirconia compact, process for producing the same, and use thereof |
JP5658098B2 (ja) * | 2011-06-16 | 2015-01-21 | 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 |
-
2014
- 2014-03-13 US US14/782,165 patent/US9796826B2/en active Active
- 2014-03-13 WO PCT/JP2014/056627 patent/WO2014178232A1/ja active Application Filing
- 2014-03-13 CN CN201480021887.0A patent/CN105143335B/zh active Active
- 2014-03-13 EP EP14792196.9A patent/EP2985311B1/en active Active
- 2014-03-13 JP JP2014537408A patent/JP5767753B2/ja active Active
Patent Citations (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000204197A (ja) * | 1998-11-09 | 2000-07-25 | Bridgestone Corp | タイヤトレッド用ゴム組成物 |
JP2000256506A (ja) * | 1999-03-05 | 2000-09-19 | Sumitomo Rubber Ind Ltd | ゴム組成物 |
JP2003501503A (ja) * | 1999-05-28 | 2003-01-14 | ソシエテ ド テクノロジー ミシュラン | ジエンエラストマー及び強化酸化チタンに基づくタイヤ用ゴム組成物 |
JP2001072802A (ja) * | 1999-09-08 | 2001-03-21 | Yokohama Rubber Co Ltd:The | タイヤ用ゴム組成物 |
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 |
JP2001180929A (ja) * | 1999-12-27 | 2001-07-03 | Sumitomo Rubber Ind Ltd | 水酸化アルミニウム、それを用いてなるタイヤトレッド用ゴム組成物及びタイヤ |
JP2002030183A (ja) * | 2000-07-14 | 2002-01-31 | Sumitomo Rubber Ind Ltd | タイヤ用トレッドゴム組成物 |
JP2002080642A (ja) * | 2000-09-08 | 2002-03-19 | Sumitomo Rubber Ind Ltd | トレッド用ゴム組成物およびそれを用いたタイヤ |
JP2002097303A (ja) * | 2000-09-21 | 2002-04-02 | Sumitomo Rubber Ind Ltd | トレッド用ゴム組成物およびそれを用いたタイヤ |
JP2003165871A (ja) * | 2001-11-28 | 2003-06-10 | Sumitomo Rubber Ind Ltd | タイヤ用ゴム組成物および当該ゴム組成物を用いたタイヤ |
JP2008528739A (ja) * | 2005-01-28 | 2008-07-31 | コンチネンタル アクチェンゲゼルシャフト | 車両タイヤのインナーライナー用のゴム組成物 |
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 |
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 |
Non-Patent Citations (1)
Title |
---|
See also references of EP2985311A4 |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015013974A (ja) * | 2013-07-08 | 2015-01-22 | 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 |
JP2015232114A (ja) * | 2014-05-15 | 2015-12-24 | 住友ゴム工業株式会社 | ゴム組成物及び空気入りタイヤ |
JP2016113051A (ja) * | 2014-12-16 | 2016-06-23 | 住友ゴム工業株式会社 | 空気入りタイヤ |
US10766305B2 (en) | 2014-12-16 | 2020-09-08 | Sumitomo Rubber Industries, Ltd. | Pneumatic tire |
US20190062538A1 (en) * | 2016-05-16 | 2019-02-28 | Sumitomo Rubber Industries, Ltd. | Rubber composition |
JP2017165409A (ja) * | 2017-05-10 | 2017-09-21 | 住友ゴム工業株式会社 | 空気入りタイヤ |
JP2019183010A (ja) * | 2018-04-11 | 2019-10-24 | 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 |
JP7243033B2 (ja) | 2018-04-11 | 2023-03-22 | 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 |
JP2020180253A (ja) * | 2019-04-26 | 2020-11-05 | 横浜ゴム株式会社 | スタッドレスタイヤ用ゴム組成物及びスタッドレスタイヤ |
JP7381835B2 (ja) | 2019-04-26 | 2023-11-16 | 横浜ゴム株式会社 | スタッドレスタイヤ用ゴム組成物及びスタッドレスタイヤ |
Also Published As
Publication number | Publication date |
---|---|
US9796826B2 (en) | 2017-10-24 |
EP2985311A1 (en) | 2016-02-17 |
CN105143335A (zh) | 2015-12-09 |
JPWO2014178232A1 (ja) | 2017-02-23 |
EP2985311B1 (en) | 2020-09-23 |
EP2985311A4 (en) | 2016-12-07 |
US20160046781A1 (en) | 2016-02-18 |
JP5767753B2 (ja) | 2015-08-19 |
CN105143335B (zh) | 2017-11-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2014178232A1 (ja) | タイヤ用ゴム組成物及び空気入りタイヤ | |
JP6173078B2 (ja) | タイヤ用ゴム組成物及び空気入りタイヤ | |
WO2015104955A1 (ja) | 空気入りタイヤ | |
JP6072979B2 (ja) | 空気入りタイヤ | |
JP5097862B1 (ja) | タイヤ用ゴム組成物及び空気入りタイヤ | |
JP7140212B2 (ja) | 空気入りタイヤ | |
JP7422487B2 (ja) | ゴム組成物、及びタイヤ | |
EP2868696A1 (en) | Rubber composition for tire treads | |
JP2019038298A (ja) | 空気入りタイヤ | |
JP2011132305A (ja) | タイヤ用ゴム組成物及び空気入りタイヤ | |
US20150329696A1 (en) | Rubber composition and pneumatic tire | |
JPWO2018056382A1 (ja) | ゴム組成物、及びタイヤ | |
JPWO2017209262A1 (ja) | ゴム組成物、及びタイヤ | |
JP2022062124A (ja) | 空気入りタイヤ | |
JP6521611B2 (ja) | 加硫ゴム組成物およびそれを用いたタイヤ | |
WO2021090660A1 (ja) | タイヤ用ゴム組成物およびタイヤ | |
JP5214930B2 (ja) | ゴム組成物及び空気入りタイヤ | |
WO2018056383A1 (ja) | ゴム組成物、及びタイヤ | |
JP7375536B2 (ja) | トレッド用ゴム組成物およびタイヤ |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201480021887.0 Country of ref document: CN |
|
ENP | Entry into the national phase |
Ref document number: 2014537408 Country of ref document: JP Kind code of ref document: A |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 14792196 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14782165 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2014792196 Country of ref document: EP |