JP5381396B2 - Rubber composition for tire tread - Google Patents

Rubber composition for tire tread Download PDF

Info

Publication number
JP5381396B2
JP5381396B2 JP2009151413A JP2009151413A JP5381396B2 JP 5381396 B2 JP5381396 B2 JP 5381396B2 JP 2009151413 A JP2009151413 A JP 2009151413A JP 2009151413 A JP2009151413 A JP 2009151413A JP 5381396 B2 JP5381396 B2 JP 5381396B2
Authority
JP
Japan
Prior art keywords
weight
rubber
parts
rubber composition
tire tread
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
JP2009151413A
Other languages
Japanese (ja)
Other versions
JP2010031262A (en
Inventor
慶寛 亀田
陽一 瀧澤
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
Priority to JP2008169956 priority Critical
Priority to JP2008169956 priority
Application filed by 横浜ゴム株式会社 filed Critical 横浜ゴム株式会社
Priority to JP2009151413A priority patent/JP5381396B2/en
Publication of JP2010031262A publication Critical patent/JP2010031262A/en
Application granted granted Critical
Publication of JP5381396B2 publication Critical patent/JP5381396B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/80Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/86Optimisation of rolling resistance, e.g. weight reduction 

Description

  TECHNICAL FIELD The present invention relates to a rubber composition for tire treads, and more specifically, a rubber composition for tire treads that quickly raises dry grip performance, extends the durability of the dry grip performance, and improves blow resistance. Related to things.

  It is known that the grip performance of a pneumatic tire is greatly affected by the tire temperature, and sufficient grip performance cannot be obtained at low temperatures. In particular, in a racing tire, it is required that the rubber composition constituting the tread has a characteristic that reaches a high temperature state as soon as possible after the start of running. For this reason, a large amount of filler such as carbon black is blended in the rubber composition for tread. However, a rubber composition containing a large amount of a filler has a problem in that when it runs for a long time, a heat sag phenomenon occurs, the dry grip performance gradually decreases, and eventually blows.

  As a countermeasure against this, Patent Document 1 discloses that, as a tire tread rubber composition, a carbon black having a small particle diameter is blended with a styrene butadiene rubber having a high glass transition temperature, thereby improving the rise of dry grip performance and heat sag resistance. Proposes improvements. However, this tire tread rubber composition still has room for improvement in terms of heat resistance (blow resistance) when high-speed running is continued.

JP 2007-246625 A

  An object of the present invention is to provide a rubber composition for a tire tread that not only improves early start-up and sustainability of dry grip performance but also improves blow resistance.

The rubber composition for a tire tread of the present invention that achieves the above object has a nitrogen adsorption specific surface area of 140 with respect to 100 parts by weight of a diene rubber containing 10% by weight or more of a styrene butadiene rubber having a glass transition temperature of −25 ° C. or higher. 80 to 150 parts by weight of a filler containing 10 to 150 parts by weight of carbon black of ˜350 m 2 / g, 0.01 to 5 parts by weight of tea extract, and 60 to 200 parts by weight of a softening agent And

  The styrene butadiene rubber may have a glass transition temperature of −20 ° C. or more, and may be blended in the diene rubber by 20% by weight or more.

  In addition, when blending at least one selected from terpene phenol resins and aromatic modified terpene resins, blending with a softening point of 80 to 130 ° C. is 5 to 70 parts by weight with respect to 100 parts by weight of the diene rubber. Good.

  The tea extract consists of (+)-catechin, (−)-epicatechin, (+)-gallocatechin, (−)-epigallocatechin, (−)-epicatechin gallate and (−)-epigallocatechin gallate. It is good that it is at least one selected from the group.

  This rubber composition for a tire tread can be suitably used as a constituent material of a pneumatic tire.

According to the rubber composition for a tire tread of the present invention, the nitrogen adsorption specific surface area is 140 to 350 m 2 with respect to 100 parts by weight of a diene rubber containing 10% by weight or more of styrene butadiene rubber having a glass transition temperature of −25 ° C. or more. 80 to 150 parts by weight of a filler containing 10 to 150 parts by weight of carbon black / g and 60 to 200 parts by weight of a softening agent are blended to enable early start-up of dry grip performance after starting running. At the same time, the sustainability can be made possible. Furthermore, by blending 0.01 to 5 parts by weight of the tea extract, the tea extract functions as an antioxidant to improve the heat resistance of the rubber composition, and the hysteresis loss at high temperature of the rubber composition ( Since the effect of suppressing the increase in tan δ) at 60 ° C. is performed and further heat generation of the tire in a high temperature state is suppressed, the heat resistance and blow resistance can be improved.

  In the rubber composition for a tire tread of the present invention, a diene rubber is used as the rubber component. As the diene rubber, styrene butadiene rubber having a glass transition temperature of −25 ° C. or more must be included. By including a styrene-butadiene rubber having a glass transition temperature of −25 ° C. or higher, the heat-resistant sagging property during high-speed running is improved. The glass transition temperature of the styrene butadiene rubber is preferably −20 ° C. or higher, more preferably −20 ° C. to −5 ° C. If the glass transition temperature of the styrene butadiene rubber is too high, it takes time until the heat build-up becomes large, and the dry grip performance cannot be brought up early.

  Further, the type of styrene butadiene rubber may be either solution polymerized styrene butadiene rubber or emulsion polymerized styrene butadiene rubber as long as it has the glass transition temperature described above. The styrene-butadiene rubber may be an oil-extended product, but the glass transition temperature of the oil-extended SBR is the glass transition temperature of the styrene-butadiene rubber in a state that does not contain an oil component. The glass transition temperature is measured by differential scanning calorimetry (DSC) with a thermogram measured at a rate of temperature increase of 20 ° C./min, and the low temperature side baseline and the transition zone slope (straight line) are each extended. The temperature at the intersection of the lines.

  The blending amount of the styrene butadiene rubber having a glass transition temperature of −25 ° C. or more in the diene rubber is 10% by weight or more, preferably 20% by weight or more, more preferably 25 to 100% by weight. When the blending amount of the styrene butadiene rubber having a glass transition temperature of −25 ° C. or more is less than 10% by weight, the heat generation of the rubber is too low and the initial grip is lowered. Furthermore, the tire has low grip performance throughout the lap.

  In the present invention, as diene rubber other than styrene butadiene rubber having a glass transition temperature of −25 ° C. or higher, natural rubber, isoprene rubber, butadiene rubber, acrylonitrile-butadiene rubber, butyl rubber, styrene having a glass transition temperature of less than −25 ° C. -Butadiene rubber etc. are mentioned. Of these, natural rubber, isoprene rubber, butadiene rubber, and styrene-butadiene rubber having a glass transition temperature of less than −25 ° C. are preferable. These diene rubbers can be used alone or as any blend.

  The rubber composition for tire treads of the present invention increases the strength of rubber by blending carbon black. The compounding amount of carbon black is 10 to 150 parts by weight, preferably 60 to 140 parts by weight based on 100 parts by weight of the diene rubber. When the blending amount of carbon black is less than 10 parts by weight, the rubber strength cannot be sufficiently increased. Moreover, when the compounding quantity of carbon black exceeds 150 weight part, heat-resistant sagging property will deteriorate. Moreover, the viscosity of the rubber composition for tire treads increases and the molding processability deteriorates.

The carbon black suitably used in the present invention has a nitrogen adsorption specific surface area (N 2 SA) of 140 to 350 m 2 / g, preferably 190 to 300 m 2 / g. When the nitrogen adsorption specific surface area of carbon black is less than 140 m 2 / g, the rubber strength cannot be sufficiently increased. When the nitrogen adsorption specific surface area exceeds 350 m 2 / g, the heat sag resistance and the blow resistance are deteriorated. In addition, the wet grip performance is deteriorated and the rubber viscosity is increased to deteriorate the workability. The nitrogen adsorption specific surface area (N 2 SA) of carbon black is determined according to JIS K6217-2.

  The rubber composition for a tire tread of the present invention may contain a filler other than carbon black. The amount of the filler containing 10 to 150 parts by weight of carbon black is 80 to 150 parts by weight, preferably 10 to 70 parts by weight, based on 100 parts by weight of the diene rubber. Therefore, when only carbon black is blended with the diene rubber, the blending amount of carbon black is 80 to 150 parts by weight. When the blending amount of the filler containing carbon black is less than 80 parts by weight, the rubber strength cannot be sufficiently increased. Moreover, when the compounding quantity of the filler containing carbon black exceeds 150 weight part, heat-resistant sagging property will deteriorate. Moreover, the viscosity of the rubber composition for tire treads increases and the molding processability deteriorates.

  Examples of fillers other than carbon black include silica, clay, titanium oxide, talc, calcium carbonate, aluminum hydroxide, mica, and the like. Among these, silica is preferable, and the wet grip performance of the rubber composition for a tire tread can be improved.

  Silica has a problem that the dispersibility with respect to the diene rubber is poor because the particles are likely to aggregate due to hydrogen bonding of silanol groups present on the particle surface. If the dispersibility of silica is poor, the effect of improving wet grip performance cannot be obtained sufficiently. As described later, the rubber composition for a tire tread of the present invention improves the dispersibility of silica by blending a tea extract, so that the hysteresis loss can be further reduced.

  In the rubber composition for a tire tread, the compounding amount of silica is preferably 20 to 140 parts by weight, more preferably 30 to 130 parts by weight with respect to 100 parts by weight of the diene rubber. If the amount of silica is less than 20 parts by weight, the effect of improving wet grip performance cannot be obtained sufficiently. On the other hand, when the amount of silica exceeds 140 parts by weight, it is difficult to mix with rubber and it is difficult to obtain a rubber composition for a tread having a high degree of silica dispersion in a uniform state. Further, the scorch time is shortened, the extrudability of the rubber composition for tread is also deteriorated, and the productivity is deteriorated.

Silica preferably used in the present invention, CTAB adsorption specific surface area is preferably 100 to 250 m 2 / g, may more preferably at 110~200m 2 / g. When the CTAB adsorption specific surface area of silica is less than 100 m 2 / g, the rubber strength cannot be sufficiently increased. If the CTAB adsorption specific surface area of silica exceeds 250 m 2 / g, the rubber viscosity increases and the processability deteriorates. The CTAB adsorption specific surface area of silica shall be determined according to the standard of ASTM-D3765-80.

  Since the tea extract blended in the tire tread rubber composition of the present invention functions as an antioxidant and increases heat resistance, the heat sag resistance and blow resistance of the tire tread rubber composition can be improved. . In addition, the tea extract unexpectedly reduces the hysteresis loss (tan δ at 60 ° C.) of the rubber composition at high temperature and suppresses further heat generation of the tire in a high temperature state, thereby improving heat resistance and resistance. Blowability can be further improved. The reason for this is not clear, but it is considered that the dispersibility of carbon black and filler is improved by blending carbon black or carbon black and filler together with tea extract.

  The blending amount of the tea extract is 0.01 to 5 parts by weight, preferably 0.03 to 4 parts by weight, based on 100 parts by weight of the diene rubber. If the blended amount of the tea extract is less than 0.01 parts by weight, the desired effect cannot be obtained. Moreover, when the compounding quantity of a tea extract exceeds 5 weight part, since the dispersibility of a filler is deteriorated on the contrary, heat resistance drooping resistance and blow resistance deteriorate. Moreover, wet grip performance deteriorates.

  The tea extract used in the present invention is an extract from at least one selected from green tea, oolong tea, and black tea. From these tea leaves or ground tea leaves, water or hot water, an organic solvent is used as an extractant. Extraction may be performed at an extraction temperature of ˜60 ° C. Examples of the organic solvent include methanol, ethanol, isopropanol, ethyl acetate, glycerin and the like. These extractants may be used alone or in combination of two or more.

  For the tea extract, the fraction extracted with the above extractant is used. When extracted with water, hot water, or an organic solvent, the extract may be used as it is as a tea extract. However, from the viewpoint of handleability, water is removed from the extract by spray drying or freeze drying. It is recommended to use it in powder form.

  The tea extract used in the present invention contains tea-derived polyphenols. These polyphenols are mainly composed of flavonoids, and examples of flavonoids include flavones, flavonols, flavanols, flavone glycosides, and the like. In addition, condensed tannins are generated by combining a plurality of flavonoids. Of the flavonoids, flavanols are catechins having a flavan-3-ol skeleton.

  In the present invention, the polyphenols contained in the tea extract are roughly classified into catechins and tea polyphenols other than catechins. Examples of catechin include (+)-catechin, (−)-epicatechin, (+)-gallocatechin, (−)-epigallocatechin, (−)-epicatechin gallate, (−)-epigallocatechin gallate, and the like. Illustrated. As a tea extract, what is necessary is just to contain at least 1 sort (s) chosen from the group which consists of the above-mentioned compound. The tea extract preferably contains catechin, and the content of catechin in the tea extract is preferably 5% by weight or more, more preferably 6 to 85% by weight. When the content of catechin is less than 5% by weight, sufficient antioxidant performance cannot be obtained.

  Further, tea polyphenols other than catechins are tea-derived flavonoids other than catechins and tea polyphenols other than flavonoids. By containing these tea polyphenols, the dispersibility of catechin in rubber is made better than when only catechin is blended. For this reason, while making the antioxidant effect of catechin higher, the synergistic effect with the antioxidant effect of tea polyphenols can be expected.

  The tea extract used in the rubber composition for a tire tread of the present invention may be the tea extract described above as it is, or an antioxidant comprising a mixture to which other natural compounds and / or surfactants are added. May be used as Examples of natural compounds include tocopherol, ascorbic acid, polyphenols excluding tea-derived polyphenols, vegetable oils, and animal oils. Examples of the surfactant include monoglycerin fatty acid ester, polyglycerin fatty acid ester, sucrose fatty acid ester, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, propylene glycol fatty acid ester, polyglycerin condensed fatty acid ester and the like. .

  Such antioxidants are commercially available, for example, Sun Chemical Co., Ltd. Sunphenon DK (tea extract containing 74% by weight of tea-derived polyphenols containing tea catechins by weight, 92% by weight, minerals, ash, etc.), sun Flavon HG (tea extract containing 73% by weight of tea catechins containing 89% by weight of tea-derived polyphenols and 11% by weight of minerals, ash, etc.), Sankator No1 (containing 10% by weight of tea-derived polyphenols containing 70% by weight of tea catechins) And those treated with a surfactant).

  The rubber composition for tire treads of the present invention improves dry grip performance and wet grip performance by blending a softener. The blending amount of the softening agent is 60 to 200 parts by weight, preferably 70 to 180 parts by weight with respect to 100 parts by weight of the diene rubber. When the blending amount of the softening agent is less than 60 parts by weight, the effect of improving the dry grip performance and the wet grip performance cannot be obtained. Moreover, when the compounding quantity of a softening agent exceeds 200 weight part, heat-sagging property and blow resistance will deteriorate. The softeners are all softeners contained in the rubber composition for tire treads. The blending amount of the softener is an oil-extended softener component (process) when the diene rubber is an oil-extended product. Oil or extender oil) and the total amount of softener blended in the rubber composition.

  Examples of the softener include petroleum-based softeners and vegetable oil-based softeners. Examples of petroleum-based softeners include paraffinic oil, aroma-based oil, and naphthenic oil. Of these, aroma oil is preferable.

  The rubber composition for a tire tread of the present invention can contain a terpene phenol resin and / or an aromatic modified terpene resin. By blending a terpene phenol resin and an aromatic modified terpene resin, after starting the running of the rubber composition for a tire tread, the dry grip performance can be started early and the dry grip performance can be maintained. Thus, the heat resistance can be improved.

  The blending amount of the terpene phenol resin and / or aromatic modified terpene resin is preferably 5 to 70 parts by weight, more preferably 10 to 65 parts by weight with respect to 100 parts by weight of the diene rubber. If the blending amount is less than 5 parts by weight, the early rise of dry grip performance cannot be improved. On the other hand, when the blending amount exceeds 70 parts by weight, the dry grip performance has excellent early startability, but the dry grip performance sustainability and heat sag resistance deteriorate.

  The terpene phenol resin and aromatic modified terpene resin used in the present invention preferably have a softening point of 80 to 130 ° C. A more preferable softening point is 85 to 125 ° C. When the softening point is less than 80 ° C., the dry grip performance cannot be sufficiently obtained. On the other hand, if the softening point exceeds 130 ° C., the start of dry grip performance at the beginning of traveling cannot be accelerated. In addition, a softening point means the softening point measured by DSC (differential scanning calorimeter) based on JISK6220-1.

  Such terpene phenol resin and aromatic modified terpene resin can be appropriately selected and used from those usually used in rubber compositions for tires. Examples of the terpene phenol resin include YS Polystar T100 (softening temperature 100 ° C.), YS Polystar T115 (softening temperature 115 ° C.), YS Polystar U115 (softening temperature 115 ° C.) and the like manufactured by Yashara Chemical Co., Ltd. Examples of the aromatic modified terpene resin include YS resin TO85 (softening temperature 85 ° C.), YS resin TO 105 (softening temperature 105 ° C.), YS resin TO 115 (softening temperature 115 ° C.), YS resin TO 125 (softening temperature) manufactured by Yashara Chemical Co., Ltd. 125 ° C.) and the like.

  The rubber composition for a tire tread of the present invention is blended with various additives generally used in a tire tread rubber composition such as a vulcanizing agent, a vulcanization accelerator, an anti-aging agent, and a coupling agent. Such an additive can be kneaded by a general method to obtain a rubber composition for a tire tread, which can be used for vulcanization or crosslinking. As long as the amount of these additives is not contrary to the object of the present invention, a conventional general amount can be used. The rubber composition for a tire tread of the present invention can be produced by mixing each of the above components using a known rubber kneading machine such as a Banbury mixer, a kneader, or a roll.

  The rubber composition for a tire tread of the present invention enables early start-up of the dry grip performance after the start of running, and also enables sustainability of the quick start dry grip performance. Moreover, since the heat resistance of the rubber composition is high and the hysteresis loss at high temperature is suppressed, the heat sag resistance can be further increased and the blow resistance can be improved. This rubber composition for a tire tread can be suitably used not only as a racing tire but also as a passenger tire. Since these pneumatic tires have excellent dry grip performance and excellent blow resistance, they can safely run at high speed.

  EXAMPLES Hereinafter, although an Example demonstrates this invention further, the scope of the present invention is not limited to these Examples.

  14 types of rubber compositions for tire treads (Examples 1 to 8 and Comparative Examples 1 to 6) each having the composition shown in Tables 1 and 2 were weighed for the composition components excluding sulfur and the vulcanization accelerator, and 16 L The mixture was kneaded with a Banbury mixer for 10 minutes, and the master batch was discharged at a temperature of 160 ° C. and cooled at room temperature. The master batch was subjected to a 16 L Banbury mixer, and sulfur and a vulcanization accelerator were added and mixed to prepare a tire tread rubber composition.

  The obtained 14 types of rubber compositions for tire treads (Examples 1 to 8 and Comparative Examples 1 to 6) were each vulcanized at 150 ° C. for 30 minutes in a predetermined shape mold to produce test pieces, Blow resistance was measured by the method shown below.

Blow resistance Using a Goodrich flexometer (manufactured by Ueshima Seisakusho), fatigue failure occurs under the conditions of a load of 20 kg, a stroke of 4.4 mm, a rotation speed of 1800 rpm, and an ambient temperature of 100 ° C. so as to comply with JIS K6265. The time until was measured. The obtained results are shown in Tables 1 and 2 as indexes for setting Comparative Example 1 to 100. A larger index means better blow resistance.

  In addition, pneumatic tires for racing with a tire size of 195 / 55R15, in which a tire tread portion was constituted by the obtained 14 types of rubber compositions, were manufactured. The obtained pneumatic tires are each assembled into rims with a rim size of 15 x 6 J and a pneumatic pressure of 150 kPa and mounted on a competition vehicle. The test driver has a circuit course with wet conditions (about 2 km per lap) and a circuit course with dry conditions (5 laps) Measure the lap time for each lap when you run 10 laps (approx. 2km per lap), and determine the wet grip performance, the initial dry grip performance (dry grip performance in the first half of the run) and the sustainability of the dry grip performance using the following judgment methods. (Dry grip performance in the latter half of traveling) was evaluated, and the obtained results are shown in Table 1.

Initial performance of dry grip (dry grip performance in the first half of driving)
The average time of 1 to 3 laps when the circuit course under dry conditions was continuously run for 10 laps was evaluated according to the following criteria, using the average time of the pneumatic tire of Comparative Example 1 as the reference time. The higher the score, the better the early rise of dry grip performance at the beginning of driving.
5: The average lap time is 0.5 seconds or more faster than the reference time.
4: The average lap time is 0.2 seconds or more and less than 0.5 seconds faster than the reference time.
3: The difference between the average lap time and the reference time is within a range of less than 0.2 seconds.
2: The average lap time is 0.2 seconds or more and less than 0.5 seconds later than the reference time.
1: The average lap time is 0.5 seconds or more later than the reference time.

Persistence of dry grip (dry grip performance in the second half of driving)
The average time of 8 to 10 laps when the circuit course under dry conditions was continuously run for 10 laps was evaluated according to the following criteria, using the average time of the pneumatic tire of Comparative Example 1 as the reference time. The higher the score, the better the durability of the dry grip performance.
5: The average lap time is 0.5 seconds or more faster than the reference time.
4: The average lap time is 0.2 seconds or more and less than 0.5 seconds faster than the reference time.
3: The difference between the average lap time and the reference time is within a range of less than 0.2 seconds.
2: The average lap time is 0.2 seconds or more and less than 0.5 seconds later than the reference time.
1: The average lap time is 0.5 seconds or more later than the reference time.

Wet Grip Performance The 5-lap average time when the circuit course under wet conditions was continuously run for 5 laps was evaluated based on the following criteria, with the average time of the pneumatic tire of Comparative Example 1 as the reference time. A higher score means better wet grip performance.
5: The average lap time is 0.5 seconds or more faster than the reference time.
4: The average lap time is 0.2 seconds or more and less than 0.5 seconds faster than the reference time.
3: The difference between the average lap time and the reference time is within a range of less than 0.2 seconds.
2: The average lap time is 0.2 seconds or more and less than 0.5 seconds later than the reference time.
1: The average lap time is 0.5 seconds or more later than the reference time.

The types of raw materials used in Tables 1 and 2 are shown below.
SBR1: emulsion polymerization styrene butadiene rubber, glass transition temperature -20 ° C (NIPOL 9529 manufactured by Nippon Zeon Co., Ltd., oil-extended product with 50 parts by weight of aroma oil added to 100 parts by weight of SBR)
SBR2: emulsion polymerization styrene butadiene rubber, glass transition temperature -35 ° C. (NIPOL 9526 manufactured by Nippon Zeon Co., Ltd., oil-extended product with 50 parts by weight of aroma oil added to 100 parts by weight of SBR)
Carbon black 1: Nitrogen adsorption specific surface area 125 m 2 / g (N234, Showa Cabot)
Carbon black 2: Nitrogen adsorption specific surface area 142 m 2 / g (Mitsubishi Chemical Corporation Dia Black A)
Carbon black 3: Nitrogen adsorption specific surface area 250 m 2 / g (Raven 2500 ULTRA manufactured by Columbian Chemicals Company)
Carbon black 4: Nitrogen adsorption specific surface area 390 m 2 / g (CD2019 manufactured by Columbian Chemicals Company)
Silica: 7000GR manufactured by Degussa (CTAB adsorption specific surface area 155 m 2 / g)
Coupling agent: Silane coupling agent, Si69 manufactured by Degussa
Tea extract: 10% by weight of tea-derived polyphenol containing 70% by weight of tea catechin and treated with a surfactant, Taiyo Kagaku Sankator No1
Aromatic terpene resin: aromatic modified terpene resin, softening temperature of 85 ° C. (YS resin TO85 manufactured by Yasuhara Chemical Co., Ltd.)
Terpene phenol resin: Softening temperature 125 ° C. (YS resin TO125 manufactured by Yasuhara Chemical Co., Ltd.)
Aroma oil: Process X-140 manufactured by Japan Energy
Antioxidant 1: SANTOFLEX 6PPD manufactured by Flexis
Antioxidant 2: SANTOFLEX 3C manufactured by Flexis
Zinc Hana: Zinc Oxide 3 types manufactured by Shodo Chemical Industry Co., Ltd. Stearic Acid: Beads Stearic Acid YR manufactured by NOF Corporation
Vulcanization accelerator 1: Noxeller TOT-N manufactured by Ouchi Shinsei Chemical Co., Ltd.
Vulcanization accelerator 2: Noxeller CZ-G manufactured by Ouchi Shinsei Chemical Industry Co., Ltd.
Sulfur: Fine powder sulfur with Jinhua seal oil manufactured by Tsurumi Chemical Co., Ltd.

Claims (5)

10 to 150 parts by weight of carbon black having a nitrogen adsorption specific surface area of 140 to 350 m 2 / g per 100 parts by weight of diene rubber containing 10% by weight or more of styrene butadiene rubber having a glass transition temperature of −25 ° C. or more A rubber composition for a tire tread in which 80 to 150 parts by weight of a filler, 0.01 to 5 parts by weight of a tea extract, and 60 to 200 parts by weight of a softening agent are blended.
  The rubber composition for a tire tread according to claim 1, wherein the glass transition temperature of the styrene butadiene rubber is -20 ° C or higher, and the styrene butadiene rubber is blended in the diene rubber by 20% by weight or more.
  The at least 1 sort (s) chosen from the terpene phenol resin whose softening point is 80-130 degreeC and an aromatic modified terpene resin was mix | blended 5 to 70 weight part with respect to 100 weight part of said diene type rubber | gum. Rubber composition for tire tread.
  The tea extract comprises (+)-catechin, (−)-epicatechin, (+)-gallocatechin, (−)-epigallocatechin, (−)-epicatechin gallate and (−)-epigallocatechin gallate. The rubber composition for a tire tread according to claim 1, 2 or 3, which is at least one selected from the group consisting of:
  The pneumatic tire using the rubber composition for tire treads in any one of Claims 1-4.
JP2009151413A 2008-06-30 2009-06-25 Rubber composition for tire tread Expired - Fee Related JP5381396B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2008169956 2008-06-30
JP2008169956 2008-06-30
JP2009151413A JP5381396B2 (en) 2008-06-30 2009-06-25 Rubber composition for tire tread

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2009151413A JP5381396B2 (en) 2008-06-30 2009-06-25 Rubber composition for tire tread

Publications (2)

Publication Number Publication Date
JP2010031262A JP2010031262A (en) 2010-02-12
JP5381396B2 true JP5381396B2 (en) 2014-01-08

Family

ID=41736105

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2009151413A Expired - Fee Related JP5381396B2 (en) 2008-06-30 2009-06-25 Rubber composition for tire tread

Country Status (1)

Country Link
JP (1) JP5381396B2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4849176B2 (en) * 2010-02-26 2012-01-11 横浜ゴム株式会社 Rubber composition for tire tread and pneumatic tire using the same
JP5559234B2 (en) * 2011-08-09 2014-07-23 住友ゴム工業株式会社 Rubber composition for tire and pneumatic tire
JP6101105B2 (en) * 2013-02-19 2017-03-22 株式会社ブリヂストン Rubber composition for tire
RU2660883C1 (en) 2014-11-27 2018-07-10 Бриджстоун Корпорейшн Rubber composition, method for its production and tire
JP6567357B2 (en) * 2015-08-05 2019-08-28 Toyo Tire株式会社 Rubber composition and pneumatic tire
JP6593250B2 (en) * 2016-05-12 2019-10-23 横浜ゴム株式会社 Rubber composition for tire

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3301202B2 (en) * 1994-03-18 2002-07-15 住友化学工業株式会社 Method for producing vulcanized rubber excellent in hardness and dynamic elastic modulus
JPH11106569A (en) * 1997-10-02 1999-04-20 Erubu:Kk Antibacterial rubber and antibacterial rubber latex
JP4741061B2 (en) * 2000-09-07 2011-08-03 住友ゴム工業株式会社 Rubber composition for tire tread
JP4559692B2 (en) * 2002-06-19 2010-10-13 株式会社ブリヂストン Tread rubber composition and tire using the same
JP2005029590A (en) * 2003-07-07 2005-02-03 Bridgestone Corp Natural rubber with reduced odor
FR2889538B1 (en) * 2005-08-08 2007-09-14 Michelin Soc Tech Plasticating system for combining rubber.
JP2009138018A (en) * 2007-12-03 2009-06-25 Bridgestone Corp Rubber composition and tire using the same
JP5536648B2 (en) * 2008-06-18 2014-07-02 株式会社ブリヂストン Tire rubber composition and tire using the tire rubber composition
JP4572991B2 (en) * 2008-06-30 2010-11-04 横浜ゴム株式会社 Rubber composition for tire

Also Published As

Publication number Publication date
JP2010031262A (en) 2010-02-12

Similar Documents

Publication Publication Date Title
CN104130461B (en) Rubber composition for tire and pneumatic tire
CA2803883C (en) Tire tread for high performance tires
JP5200134B2 (en) Rubber composition for tread and pneumatic tire
EP1529806B1 (en) Rubber composition and tyres
US8100157B2 (en) Rubber composition for tire and pneumatic tire using the same
JP6674977B2 (en) Rubber composition and tire
EP2270088B1 (en) Rubber composition for tire and tire
EP3064543B1 (en) Winter tire
JP4752957B2 (en) Rubber composition for tire tread
US9846954B2 (en) Tread with ultra efficient vulcanization system
US10576785B2 (en) Rubber composition for aircraft tire treads
KR101461254B1 (en) Rubber composition for sidewall and pneumatic tire made with the same
CN105658718B (en) Include the tire containing zinc acrylate resin derivative and the composition of peroxide
JP5965051B2 (en) Tire tread for improved wear characteristics
KR101504995B1 (en) Tires and tread formed from phenol-aromatic-terpene resin
US8871832B2 (en) Rubber composition for use in tire treads and pneumatic tire using the same
JP5873559B2 (en) Tread with super efficient vulcanization system
RU2648490C1 (en) Tire, having a protector for operation at low temperature and clutch with wet road
JP5900036B2 (en) Rubber composition for tire tread
JP4943491B2 (en) Rubber composition for studless tire and studless tire
US10035900B2 (en) Rubber composition for treads and pneumatic tire
EP2674454B1 (en) Pneumatic tire
EP1808456B1 (en) Rubber composition and tire
JP5755663B2 (en) Tire with tread containing thermoplastic elastomer
CN106459514B (en) Tread rubber composition and pneumatic tire

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20120524

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20130823

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20130903

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20130916

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

LAPS Cancellation because of no payment of annual fees