WO2020110940A1 - Composition de caoutchouc pour pneumatique - Google Patents

Composition de caoutchouc pour pneumatique Download PDF

Info

Publication number
WO2020110940A1
WO2020110940A1 PCT/JP2019/045802 JP2019045802W WO2020110940A1 WO 2020110940 A1 WO2020110940 A1 WO 2020110940A1 JP 2019045802 W JP2019045802 W JP 2019045802W WO 2020110940 A1 WO2020110940 A1 WO 2020110940A1
Authority
WO
WIPO (PCT)
Prior art keywords
mass
rubber
parts
tire
rubber composition
Prior art date
Application number
PCT/JP2019/045802
Other languages
English (en)
Japanese (ja)
Inventor
克典 清水
誠人 尾崎
Original Assignee
横浜ゴム株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 横浜ゴム株式会社 filed Critical 横浜ゴム株式会社
Priority to JP2020513955A priority Critical patent/JP7457252B2/ja
Publication of WO2020110940A1 publication Critical patent/WO2020110940A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • 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
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L15/00—Compositions of rubber derivatives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • 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 present invention mainly relates to a rubber composition for a tire intended to be used for an undertread portion of a pneumatic tire.
  • tan ⁇ at 60° C. (hereinafter, referred to as “tan ⁇ (60° C.)”) measured by dynamic viscoelasticity is generally used, and tan ⁇ (60° C.) of the rubber composition is small. The lower the exothermicity, the less. Then, as a method of reducing tan ⁇ (60° C.) of the rubber composition, for example, it is possible to reduce the compounding amount of a filler such as carbon black or increase the particle size of carbon black. Alternatively, it has been proposed to blend silica (see, for example, Patent Document 1).
  • the object of the present invention is a rubber composition for a tire intended mainly for use in the undertread portion of a pneumatic tire, which has low rolling resistance, and is excellent in steering stability and durability when formed into a tire. To provide a rubber composition for a tire.
  • the rubber composition for a tire of the present invention which achieves the above object has a nitrogen adsorption specific surface area N with respect to 100 parts by mass of a rubber component containing 50% by mass or more of natural rubber and 35% by mass to 50% by mass of terminal-modified butadiene rubber.
  • a rubber composition for a tire comprising 50 parts by mass or more of carbon black having 2 SA of 70 m 2 /g or less, having a hardness of 65 or more and a rebound resilience at 40° C. of 80% or more. To do.
  • the rubber composition for a tire according to the present invention is a combination of a terminal modified butadiene rubber in addition to a natural rubber as a rubber component, and a carbon black having a large particle size is compounded as a filler, and the hardness and the impact resilience of the rubber composition. Is sufficiently increased as described above, it is possible to improve the steering stability and durability of the tire while reducing rolling resistance. In particular, since carbon black having a large particle size and terminal-modified butadiene rubber are used in combination, it is possible to increase the compounding amount of carbon black and improve the rubber hardness without deteriorating heat generation. The performance of can be improved in a balanced manner.
  • the “hardness” is the hardness of the rubber composition measured by the durometer type A at a temperature of 20° C. according to JIS K6253.
  • the “repulsion elastic modulus at 40° C.” is the repulsive elastic modulus of the rubber composition measured at a temperature of 40° C. by a Lupke type repulsion elasticity testing device according to JIS K6255.
  • the molecular weight distribution (Mw/Mn) obtained from the weight average molecular weight (Mw) and the number average molecular weight (Mn) of the terminal-modified butadiene rubber is preferably 2.0 or less.
  • the rubber physical properties become better, and it is advantageous to reduce the rolling resistance and to improve the steering stability and durability of the tire.
  • the "weight average molecular weight Mw" and the "number average molecular weight Mn” are measured by gel permeation chromatography (GPC) in terms of standard polystyrene.
  • the terminal functional group of the terminal-modified butadiene rubber is at least one of a hydroxyl group, an amino group, an alkoxyl group, and an epoxy group. This increases the affinity with carbon black and further improves the dispersibility of carbon black, so it is possible to more effectively increase rubber hardness and adhesiveness while maintaining low exothermicity, and balance these performances. It is advantageous to be well balanced.
  • the amine anti-aging agent it is preferable to add 1.0 to 4.0 parts by mass of the amine anti-aging agent to 100 parts by mass of the rubber component. Further, it is preferable to add more than 0 parts by mass and 2.0 parts by mass or less of wax to 100 parts by mass of the rubber component. By thus blending the antioxidant and wax, the crack resistance and workability can be improved.
  • the rubber composition for a tire of the present invention is preferably used in the undertread portion of a pneumatic tire, and a pneumatic tire using the rubber composition for a tire of the present invention in the undertread portion has steering stability and durability. It is possible to improve fuel efficiency while maintaining good performance.
  • the rubber component is a diene rubber, which always contains natural rubber and terminal-modified butadiene rubber.
  • the natural rubber a rubber normally used in a rubber composition for tires can be used. By blending natural rubber, it is possible to obtain sufficient rubber strength as a rubber composition for tires.
  • the content of the natural rubber is 50% by mass or more, preferably 50% by mass to 70% by mass, more preferably 60% by mass to 65% by mass. If the content of natural rubber is less than 50% by mass, the rubber strength will decrease.
  • the terminal-modified butadiene rubber is a butadiene rubber modified with an organic compound having a functional group at one or both ends of the molecular chain.
  • Examples of the functional group that modifies the terminal of the molecular chain include an alkoxysilyl group, a hydroxyl group (hydroxyl group), an aldehyde group, a carboxyl group, an amino group, an amide group, an imino group, an alkoxyl group, an epoxy group, an amide group, a thiol group, Examples thereof include ether groups and siloxane bonding groups. Among them, at least one selected from a hydroxyl group (hydroxyl group), an amino group, an amide group, an alkoxyl group, an epoxy group, and a siloxane bonding group is preferable.
  • the siloxane bonding group is a functional group having a —O—Si—O— structure.
  • the content of the terminal-modified butadiene rubber is 35% by mass to 50% by mass, preferably 40% by mass to 50% by mass. If the compounding amount of the terminal-modified butadiene rubber is less than 35% by mass, fuel economy is deteriorated. If the compounding amount of the terminal-modified butadiene rubber exceeds 50% by mass, the rubber strength will decrease.
  • the molecular weight distribution (Mw/Mn) of the terminal-modified butadiene rubber is preferably 2.0 or less, more preferably 1.1 to 1.6. In this way, by using a terminal-modified butadiene rubber with a narrow molecular weight distribution, the rubber physical properties become better, and rolling resistance is reduced while effectively improving steering stability and durability when used as a tire. can do.
  • Mw/Mn molecular weight distribution of the terminal-modified butadiene rubber exceeds 2.0, the hysteresis loss becomes large, the heat generation property of the rubber becomes large, and the compression set resistance decreases.
  • the glass transition temperature Tg of the terminal-modified butadiene rubber used in the present invention is preferably ⁇ 85° C. or lower, more preferably ⁇ 90° C. to ⁇ 100° C. By setting the glass transition temperature Tg in this way, heat generation can be effectively reduced. When the glass transition temperature Tg exceeds ⁇ 80° C., the effect of reducing heat generation cannot be sufficiently obtained.
  • the glass transition temperature Tg of natural rubber is not particularly limited, but can be set to, for example, ⁇ 70° C. to ⁇ 80° C.
  • the terminal-modified butadiene rubber used in the present invention has a vinyl content of preferably 0.1% by mass to 20% by mass, more preferably 0.1% by mass to 15% by mass.
  • the vinyl content of the terminal-modified butadiene rubber is less than 0.1% by mass, the affinity with carbon black is insufficient and it becomes difficult to sufficiently reduce heat generation.
  • the vinyl content of the terminal-modified butadiene rubber exceeds 20% by mass, the glass transition temperature Tg of the rubber composition rises, and rolling resistance and abrasion resistance cannot be sufficiently improved.
  • the vinyl unit content of the terminal-modified butadiene rubber is to be measured by infrared spectroscopic analysis (Hampton method).
  • the increase/decrease in the vinyl unit content in the terminal-modified butadiene rubber can be appropriately adjusted by a usual method such as a catalyst.
  • the tire rubber composition of the present invention may contain a diene rubber other than natural rubber and terminal-modified butadiene rubber.
  • diene rubbers include, for example, butadiene rubber without terminal modification, styrene butadiene rubber, isoprene rubber, acrylonitrile-butadiene rubber and the like. These diene rubbers can be used alone or as an arbitrary blend.
  • the tire rubber composition of the present invention always contains carbon black as a filler.
  • carbon black used in the present invention has a nitrogen adsorption specific surface area N 2 SA of 70 m 2 /g or less, preferably 35 m 2 /g to 60 m 2 /g, and more preferably 35 m 2 /g to 50 m 2 /g. is there.
  • N 2 SA nitrogen adsorption specific surface area
  • the nitrogen adsorption specific surface area N 2 SA of carbon black exceeds 70 m 2 /g, the exothermic property deteriorates.
  • the nitrogen adsorption specific surface area N 2 SA of carbon black is measured according to JIS 6217-2.
  • the blending amount of carbon black is 50 parts by mass or more, preferably 55 parts by mass to 65 parts by mass, and more preferably 57 parts by mass to 60 parts by mass with respect to 100 parts by mass of the above rubber component. If the blending amount of the filler is less than 50 parts by mass, the hardness will decrease.
  • the rubber composition of the present invention may contain an inorganic filler other than carbon black.
  • inorganic fillers include silica, clay, talc, calcium carbonate, mica, aluminum hydroxide and the like.
  • the weight ratio of silica to carbon black is preferably 0.1 to 0.5, more preferably 0.15 to 0.3. Good to do. If the weight ratio is out of the above range, the effect of increasing the rubber hardness while maintaining the low exothermicity cannot be obtained. In particular, if the weight ratio of silica is too large, the exothermicity may deteriorate.
  • the total amount of the fillers is preferably 70 parts by mass or less, more preferably 55 parts by mass to 60 parts by mass. If the total amount of the fillers is more than 75 parts by mass, heat generation may be deteriorated. From the relationship between the above blending amount and the weight ratio, when silica is used in combination, the blending amount of silica is preferably 5 parts by mass to 20 parts by mass, more preferably 5 parts by mass with respect to 100 parts by mass of the diene rubber. Parts to 10 parts by mass.
  • the CTAB adsorption specific surface area of silica is preferably 100 m 2 /g to 250 m 2 /g, more preferably 135 m 2 /g to 210 m 2 /g. If the CTAB adsorption specific surface area of silica is less than 100 m 2 /g, the rubber strength will decrease. When the CTAB adsorption specific surface area of silica exceeds 250 m 2 /g, the heat generation property deteriorates. In the present invention, the CTAB adsorption specific surface area of silica shall be measured in accordance with ISO 5794.
  • an amine anti-aging agent and/or wax By compounding these, crack resistance and workability can be improved.
  • the compounding amount of the amine anti-aging agent is preferably 1.0 part by mass to 4.0 parts by mass, and more preferably 1.5 parts by mass to 3.5 parts by mass with respect to 100 parts by mass of the rubber component.
  • the blending amount of the wax is preferably more than 0 parts by mass and 2.0 parts by mass or less, more preferably 0.1 parts by mass or more and 2.0 parts by mass or less with respect to 100 parts by mass of the rubber component, and an amine-based antioxidant and a wax. May be blended alone or in combination.
  • the amount of the amine-based antioxidant is less than 1.0 part by mass, the effect of improving the crack resistance and workability cannot be expected, and especially the crack resistance is lowered. If the compounding amount of the amine anti-aging agent exceeds 4.0 parts by mass, the workability is deteriorated. If the amount of the wax compounded exceeds 2.0 parts by mass, the processability will decrease.
  • compounding agents may be added to the rubber composition for tires of the present invention.
  • Other compounding agents include reinforcing fillers other than carbon black and silica, vulcanization or crosslinking agents, vulcanization accelerators, antioxidants other than amines, liquid polymers, thermosetting resins, and thermoplastic resins.
  • Various compounding agents generally used for pneumatic tires can be exemplified.
  • the compounding amount of these compounding agents may be a conventional general compounding amount as long as the object of the present invention is not violated.
  • kneading machine a usual kneading machine for rubber, for example, Banbury mixer, kneader, roll or the like can be used.
  • the hardness of the rubber composition for a tire of the present invention having such a composition is 65 or more, preferably 65 to 75, more preferably 65 to 70.
  • the impact resilience at 40° C. of the rubber composition for a tire of the present invention is 80% or more, preferably 80% to 85%, more preferably 82% to 85%. Since the rubber composition of the present invention has such physical properties, it is possible to improve rolling stability and durability of the tire while reducing rolling resistance. When the hardness is less than 65, the steering stability when used as a tire is deteriorated. When the impact resilience is less than 80%, heat generation is deteriorated and the rolling resistance cannot be reduced.
  • the hardness and the impact resilience are not determined only by the above-mentioned composition, but are physical properties that can be adjusted by the kneading conditions and the kneading method.
  • the rubber composition for a tire of the present invention can improve rolling stability and durability when being made into a tire while reducing rolling resistance due to the above-mentioned composition and physical properties.
  • end-modified butadiene rubber is used in combination, and carbon black having a large particle size is blended as a filler, and carbon black having a large particle size and terminal-modified butadiene rubber are combined.
  • carbon black having a large particle size is blended as a filler, and carbon black having a large particle size and terminal-modified butadiene rubber are combined.
  • the hardness and impact resilience of the rubber composition are sufficiently increased as described above, it is possible to improve the steering stability and durability of the tire while reducing rolling resistance. Therefore, these performances can be improved in a well-balanced manner.
  • the rubber composition for a tire of the present invention is preferably used in the undertread portion of a pneumatic tire, and the pneumatic tire using the rubber composition for a tire of the present invention in the undertread portion has steering stability and durability. Fuel economy performance can be improved while maintaining good performance.
  • the hardness of the rubber composition was measured at a temperature of 20° C. by a durometer type A in accordance with JIS K6253. Further, the impact resilience of the rubber composition was measured at a temperature of 40° C. by a Lupke impact resilience tester in accordance with JIS K6255.
  • the obtained rubber composition was evaluated for fuel efficiency, steering stability, durability, crack resistance, and workability by the methods shown below.
  • a test tire (tire size 215/45R17) using the obtained rubber composition as an undertread was prepared and mounted on a standard rim (rim size 7JJ) to an air pressure of 230 kPa and an indoor drum tester (drum diameter). : 1707 mm) and rolling at a speed of 80 km/h while being pressed against the drum under a load equivalent to 85% of the maximum load under the air pressure described in JATMA Yearbook 2009 The resistance was measured. The evaluation result was shown by an index with the value of Standard Example 1 being 100, using the reciprocal of the measured value. The larger the index value, the smaller the rolling resistance and the better the fuel economy performance.
  • a test driver conducted a sensory evaluation on the road surface responsiveness when changing the lane at the time of running and traveling 80 km/h on a test course consisting of a paved road surface. The evaluation results are shown by index values with the standard example 1 being 100. The larger this index value, the better the road surface response at the time of lane change, and the better the steering stability.
  • Durability A test tire (tire size 215/45R17) in which the obtained rubber composition was used as an undertread was prepared, mounted on a standard rim (rim size 7JJ), the air pressure was set to 230 kPa, and mounted on a test vehicle of displacement 2000 cc. Then, the car was run on an 8-shaped turning test course under conditions of a turning acceleration of 0.8 G and 500 laps, and the amount of wear of the tread portion after running was measured. The evaluation results are shown by an index with the standard example 1 being 100, using the reciprocal of the measured value. The larger the index value, the smaller the amount of wear and the more excellent the durability.
  • the obtained rubber composition was extruded into a sheet, and two extrudates (sample for crimping) 3 hours after the extruding were subjected to a crimping load of 0.98 N, a crimping time of 0 seconds, and a crimping speed of 50 cm/min. After press-bonding under the conditions, the film was peeled under the condition of a peeling speed of 125 cm/min, and the adhesive force at that time was measured by a PICMA type tack meter (manufactured by Toyo Seiki Seisaku-sho, Ltd.). The evaluation results are shown in AC below.
  • the "tack index” used for the evaluation of A to C is an index with the measured value as standard example 1 being 100.
  • Tables 1 and 2 The types of raw materials used in Tables 1 and 2 are shown below.
  • -NR natural rubber
  • TSR20 glass transition temperature Tg: -65°C
  • SBR styrene butadiene rubber
  • Nipol 1502 glass transition temperature: -60°C
  • -Modified S-SBR Terminal-modified solution-polymerized styrene-butadiene rubber
  • Nipol NS612 manufactured by Nippon Zeon Co., Ltd.
  • BR butadiene rubber
  • Nipol BR1220 manufactured by Zeon Corporation (glass transition temperature Tg: -105°C)
  • -Modified BR1 end-modified butadiene rubber
  • JSR BR54 glass transition temperature Tg: -107°C, functional group: silanol group, molecular weight distribution 2.5
  • Modified BR2 terminal modified butadiene rubber synthesized by the following method (glass transition temperature Tg: -93°C, functional group: polyorganosiloxane group)
  • BR3 end-modified butadiene rubber, Nipol BR1250H manufactured by Nippon Zeon Co., Ltd.
  • CB1 Carbon black, Tokai Carbon Co., Ltd., Seast KHP (nitrogen adsorption specific surface area N 2 SA: 85 m 2 /g)
  • CB2 carbon black, Niteron #GN (Nitrogen adsorption specific surface area N 2 SA: 35 m 2 /g) manufactured by Shin Nikka Carbon Co., Ltd.
  • Silica Ultrasil VN3 (CTAB adsorption specific surface area: 153 m 2 /g) manufactured by Degussa ⁇ Zinc oxide: Three types of zinc oxide manufactured by Shodo Chemical Industry ⁇ Stearic acid: Lunac S-25 manufactured by Kao -Anti-aging agent 1: amine-based anti-aging agent, Santoflex 6PPD manufactured by Flexis -Anti-aging agent 2: amine-ketone type anti-aging agent, Nocrac 224 manufactured by Ouchi Shinko Chemical Industry Co., Ltd. ⁇ Wax: Ouchi Shinko Chemical Co., Ltd. Sannok Sulfur: Shikoku Kasei Co., Ltd. Mucron OT-20 ⁇ Vulcanization accelerator: Nocceller CZ manufactured by Ouchi Shinko Chemical Industry Co., Ltd.
  • the maximum temperature during the polymerization reaction was 80°C. After the continuous addition was completed, the polymerization reaction was continued for another 15 minutes, and after confirming that the polymerization conversion rate was in the range of 95% to 100%, a small amount of the polymerization solution was sampled. A small amount of the sampled polymerization solution was quenched by adding excess methanol and then air-dried to obtain a polymer, which was used as a sample for gel permeation chromatography (GPC) analysis. Using the sample, the peak top molecular weight and the molecular weight distribution of the polymer (corresponding to a conjugated diene-based polymer chain having an active end) were measured and found to be "230,000" and "1.04", respectively.
  • GPC gel permeation chromatography
  • the styrene-butadiene rubber was blended in place of the terminal-modified butadiene rubber, so the fuel economy performance deteriorated.
  • the terminal-modified solution-polymerized styrene-butadiene rubber was blended in place of the terminal-modified butadiene rubber, so the durability was deteriorated.
  • the rubber composition (tire) of Comparative Example 3 was poor in durability because the compounding amount of the terminal-modified butadiene rubber was too small.
  • the steering stability and durability deteriorated because the amount of carbon black blended was too small.
  • the rubber composition (tire) of Comparative Example 5 contained not only natural rubber and terminal-modified butadiene rubber but also styrene-butadiene rubber, and thus the impact resilience deteriorated.
  • the rubber composition (tire) of Comparative Example 7 had too low a hardness, and thus had poor steering stability.
  • the rubber composition (tire) of Comparative Example 8 had a too small impact resilience, and thus the fuel efficiency was deteriorated.
  • the rubber composition (tire) of Comparative Example 9 does not contain the terminal-modified butadiene rubber, it is not possible to obtain the effect of improving the fuel economy performance and the steering stability performance, and further, only the non-amine-based antioxidant is blended. Therefore, the crack resistance and durability deteriorated.
  • the rubber composition (tire) of Comparative Example 10 since the terminal-modified butadiene rubber was not blended, it was not possible to obtain the effect of improving the fuel economy performance, the steering stability performance, and the durability, and further, the antioxidant content was large. Since it was too much, workability deteriorated.

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

L'invention concerne une composition de caoutchouc pour pneumatiques qui est destinée principalement à être utilisée dans la production de la partie d'épaisseur sous sculpture d'un pneumatique et qui permet d'obtenir des pneumatiques ayant une faible résistance au roulement et d'excellentes propriétés en termes de stabilité de direction et de durabilité. Du noir de carbone ayant une surface spécifique déterminée par adsorption d'azote N2SA égale ou inférieure à 70 m2/g est incorporé dans une quantité d'au moins 50 parties en masse dans 100 parties en masse d'un ingrédient de caoutchouc comprenant au moins 50 % en masse de caoutchouc naturel et 35 à 50 % en masse de caoutchouc de butadiène modifié par un groupe terminal, et la composition de caoutchouc est conçue pour avoir une dureté égale ou supérieure à 65 et une résilience à 40 °C égale ou supérieure à 80 %.
PCT/JP2019/045802 2018-11-30 2019-11-22 Composition de caoutchouc pour pneumatique WO2020110940A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2020513955A JP7457252B2 (ja) 2018-11-30 2019-11-22 タイヤ用ゴム組成物

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018-225399 2018-11-30
JP2018225399 2018-11-30

Publications (1)

Publication Number Publication Date
WO2020110940A1 true WO2020110940A1 (fr) 2020-06-04

Family

ID=70852304

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2019/045802 WO2020110940A1 (fr) 2018-11-30 2019-11-22 Composition de caoutchouc pour pneumatique

Country Status (2)

Country Link
JP (1) JP7457252B2 (fr)
WO (1) WO2020110940A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115181342A (zh) * 2022-08-22 2022-10-14 四川远星橡胶有限责任公司 一种高回弹性高模量低生热胎唇护胶及其制备方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009084285A1 (fr) * 2007-12-28 2009-07-09 Sumitomo Rubber Industries, Ltd. Composition de caoutchouc pour pneu
WO2010041737A1 (fr) * 2008-10-09 2010-04-15 株式会社ブリヂストン Compositions de caoutchouc, leur procédé de fabrication et pneus les utilisant
JP2011178848A (ja) * 2010-02-26 2011-09-15 Sumitomo Rubber Ind Ltd タイヤ用ゴム組成物及び空気入りタイヤ

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5820357B2 (ja) 2012-11-08 2015-11-24 住友ゴム工業株式会社 サイドウォール、ウイング、ベーストレッド、サイドウォールパッキン、ブレーカークッション又はタイガム用ゴム組成物及び空気入りタイヤ

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009084285A1 (fr) * 2007-12-28 2009-07-09 Sumitomo Rubber Industries, Ltd. Composition de caoutchouc pour pneu
WO2010041737A1 (fr) * 2008-10-09 2010-04-15 株式会社ブリヂストン Compositions de caoutchouc, leur procédé de fabrication et pneus les utilisant
JP2011178848A (ja) * 2010-02-26 2011-09-15 Sumitomo Rubber Ind Ltd タイヤ用ゴム組成物及び空気入りタイヤ

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115181342A (zh) * 2022-08-22 2022-10-14 四川远星橡胶有限责任公司 一种高回弹性高模量低生热胎唇护胶及其制备方法
CN115181342B (zh) * 2022-08-22 2023-09-26 四川远星橡胶有限责任公司 一种高回弹性高模量低生热胎唇护胶及其制备方法

Also Published As

Publication number Publication date
JP7457252B2 (ja) 2024-03-28
JPWO2020110940A1 (ja) 2021-10-14

Similar Documents

Publication Publication Date Title
US9080042B2 (en) Rubber blend with improved rolling resistance behavior
JP5569655B2 (ja) タイヤ用ゴム組成物、空気入りタイヤ
JP2015229701A (ja) タイヤトレッド用ゴム組成物
US10533083B2 (en) Rubber composition and tire
JP7331332B2 (ja) タイヤ用ゴム組成物およびタイヤ
JP2017149897A (ja) タイヤ、及びその製造方法
JP7024712B2 (ja) タイヤ用ゴム組成物及び空気入りタイヤ
WO2020162304A1 (fr) Composition de caoutchouc, et pneumatique
JP7103434B2 (ja) 空気入りタイヤ
JP7159566B2 (ja) タイヤ用ゴム組成物
JP6521611B2 (ja) 加硫ゴム組成物およびそれを用いたタイヤ
JP6824813B2 (ja) 空気入りタイヤ
JP7315814B2 (ja) リムクッション用ゴム組成物
JP2021181530A (ja) タイヤ用ゴム組成物
JP7457252B2 (ja) タイヤ用ゴム組成物
JP7003570B2 (ja) スタッドレスタイヤ用ゴム組成物
JP6790707B2 (ja) 加硫ゴム組成物およびそれを用いたタイヤ
JP7188117B2 (ja) タイヤ用ゴム組成物
JP7271961B2 (ja) 空気入りタイヤ
JP2020117664A (ja) タイヤ用ゴム組成物
WO2021024667A1 (fr) Composition de caoutchouc pour pneu et pneu
JP2021080405A (ja) タイヤ用ゴム組成物及びタイヤ
JP7473825B2 (ja) タイヤ用ゴム組成物
JP7103458B2 (ja) タイヤ用ゴム組成物及びタイヤ
JP2020117601A (ja) タイヤ用ゴム組成物

Legal Events

Date Code Title Description
ENP Entry into the national phase

Ref document number: 2020513955

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: 19888718

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19888718

Country of ref document: EP

Kind code of ref document: A1