Classifications

• • 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
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
  • B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
  • B60C1/0016—Compositions of the tread
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
  • C08C19/00—Chemical modification of rubber
  • C08C19/22—Incorporating nitrogen atoms into the molecule
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
  • C08C19/00—Chemical modification of rubber
  • C08C19/25—Incorporating silicon atoms into the molecule
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
  • C08C19/00—Chemical modification of rubber
  • C08C19/30—Addition of a reagent which reacts with a hetero atom or a group containing hetero atoms of the macromolecule
  • C08C19/42—Addition of a reagent which reacts with a hetero atom or a group containing hetero atoms of the macromolecule reacting with metals or metal-containing groups
  • C08C19/44—Addition of a reagent which reacts with a hetero atom or a group containing hetero atoms of the macromolecule reacting with metals or metal-containing groups of polymers containing metal atoms exclusively at one or both ends of the skeleton
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L7/00—Compositions of natural rubber
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
  • Y02T10/00—Road transport of goods or passengers
  • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
  • Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction 

Definitions

• the wet grip performance and fuel economy performance of a tire to which the rubber composition is applied can be improved. Therefore, by applying the rubber composition for a tire of the present invention to a tire, it is possible to highly achieve both wet grip performance and fuel efficiency performance of the tire.
• a monovalent hydrocarbon group having 1 to 30 carbon atoms including a linear, branched, alicyclic or aromatic ring having a group, or at least one heteroatom selected from an oxygen atom, a sulfur atom and a phosphorus atom
• a monovalent hydrocarbon group having 1 to 30 carbon atoms containing a linear, branched, alicyclic or aromatic ring which may contain
• Polyhydric alcohols used as starting materials for partial esters are preferably sugars having 5 or 6 carbon atoms and having at least three hydroxyl groups (which may or may not be hydrogenated), glycols and polyhydroxy alcohols.
• a compound or the like is used.
• the raw fatty acid is preferably a saturated or unsaturated fatty acid having 10 to 20 carbon atoms, such as stearic acid, lauric acid, and palmitic acid.
• the vinyl bond content in the butadiene bond unit is not particularly limited, but is preferably 10 mol% or more and 75 mol% or less, and 20 mol% or more and 65 mol. % or less.
• the vinyl bond content is within the above range, the low-loss property and wear resistance of the rubber composition can be further improved.
• modified styrene-butadiene rubber Hampton's method [R. R. Hampton, Analytical Chemistry, 21, 923 (1949)]
• the vinyl bond content (1,2-bond content) in the butadiene bond unit can be determined.
• D, R 12 to R 22 , m, p, x, y, and z when there are a plurality of each are each independent and may be the same or different.
• i represents an integer of 0 to 6
• j represents an integer of 0 to 6
• k represents an integer of 0 to 6
• (i + j + k) is an integer of 3 to 10
• ((x x i )+(y ⁇ j)+(z ⁇ k)) is an integer from 5 to 30.
• R 1 to R 8 are each independently alkyl groups having 1 to 20 carbon atoms; L 1 and L 2 are each independently alkylene having 1 to 20 carbon atoms. is a group; n is an integer of 2-4.
• the weight average molecular weight (Mw) of the modified styrene-butadiene rubber is less than 100,000 g/mol or the number average molecular weight (Mn) is less than 50,000 g/mol
• the tensile strength when applied to the rubber composition There is a risk of deterioration in characteristics.
• the weight average molecular weight (Mw) exceeds 4,000,000 g/mol or the number average molecular weight (Mn) exceeds 2,000,000 g/mol
• the processability of the modified styrene-butadiene rubber Due to the decrease, the workability of the rubber composition deteriorates, kneading becomes difficult, and it may become difficult to sufficiently improve the physical properties of the rubber composition.
• R 14 is a substituted or unsubstituted C 1-20 alkylene group; a substituted or unsubstituted C 5-20 cycloalkylene group; or a substituent is an arylene group having 6 to 20 carbon atoms substituted or unsubstituted with, wherein the substituent is an alkyl group having 1 to 10 carbon atoms, a cycloalkyl group having 5 to 10 carbon atoms, or a 6 to 20 carbon atom is an aryl group of
• R 15 and R 16 are each independently substituted with an alkyl group having 1 to 10 carbon atoms, a cycloalkyl group having 5 to 10 carbon atoms, or an aryl group having 6 to 20 carbon atoms, or It is an unsubstituted alkylene group having 1 to 20 carbon atoms.
• the modified styrene-butadiene rubber may be used alone or in combination of two or more.
• terpenes include ⁇ -pinene, ⁇ -pinene, carene ( ⁇ -3-carene), dipentene, limonene, myrcene, alloocimene, ocimene, ⁇ -phellandrene, ⁇ -terpinene, ⁇ -terpinene, terpinolene, 1,8-cineole, 1,4-cineol, ⁇ -terpineol, ⁇ -terpineol, ⁇ -terpineol and the like.
• the nitrogen adsorption specific surface area (BET method) of silica is less than 330 m 2 /g, the elastic modulus of the rubber composition does not become too high, and the wet grip performance of the tire to which the rubber composition is applied is further improved.
• the nitrogen adsorption specific surface area (BET method) of silica is preferably 130 m 2 /g or more, and more preferably 150 m 2 /g or more. is more preferred.
• the rubber composition for tires of the present invention comprises the aforementioned rubber component, hydrogenated resin, silica and carbon black, and, if necessary, various components normally used in the rubber industry, such as silica and carbon black. fillers, silane coupling agents, antioxidants, waxes, softeners, processing aids, stearic acid, zinc oxide (zinc white), vulcanization accelerators, vulcanizing agents, etc., which do not impair the purpose of the present invention It may be contained by appropriately selecting within the range. Commercially available products can be suitably used as these compounding agents.
• the rubber composition for tires of the present invention preferably contains a silane coupling agent in order to improve the effect of the silica.
• a silane coupling agent include bis(3-triethoxysilylpropyl) tetrasulfide, bis(3-triethoxysilylpropyl) trisulfide, bis(3-triethoxysilylpropyl) disulfide, bis(2-triethoxysilyl).
• the method for producing the rubber composition is not particularly limited. It can be produced by kneading, heating, extrusion, or the like. Further, vulcanized rubber can be obtained by vulcanizing the obtained rubber composition.
• the kneading conditions are not particularly limited, and various conditions such as the input volume of the kneading device, the rotation speed of the rotor, the ram pressure, the kneading temperature, the kneading time, the type of the kneading device, etc. It can be selected as appropriate.
• the kneading device include Banbury mixers, intermixes, kneaders, rolls, etc., which are usually used for kneading rubber compositions.
• the extrusion conditions are also not particularly limited, and various conditions such as extrusion time, extrusion speed, extrusion equipment, and extrusion temperature can be appropriately selected according to the purpose.
• the extrusion device include an extruder or the like that is usually used for extrusion of a rubber composition.
• the extrusion temperature can be determined appropriately.
• the tread rubber of the present invention is characterized by comprising the rubber composition for tires described above. Since the tread rubber of the present invention is made of the rubber composition for a tire, it is possible to achieve both wet grip performance and fuel efficiency performance of the tire at a high level by applying the tread rubber to a tire.
• the tread rubber of the present invention may be applied to new tires or retreaded tires.

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• Chemical & Material Sciences (AREA)
• Health & Medical Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Organic Chemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Compositions Of Macromolecular Compounds (AREA)
• Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

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Cited By (3)

Citations (9)

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• 2022
  • 2022-03-08 US US18/561,516 patent/US20240270945A1/en active Pending
  • 2022-03-08 WO PCT/JP2022/010133 patent/WO2022249636A1/ja not_active Ceased
  • 2022-03-08 EP EP22810917.9A patent/EP4349612A4/en active Pending
  • 2022-03-08 JP JP2023524019A patent/JP7802783B2/ja active Active
  • 2022-03-08 CN CN202280038434.3A patent/CN117396553A/zh active Pending

Patent Citations (9)

Non-Patent Citations (2)

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