JP2007051169A - Pneumatic tire - Google Patents

Pneumatic tire Download PDF

Info

Publication number
JP2007051169A
JP2007051169A JP2005235048A JP2005235048A JP2007051169A JP 2007051169 A JP2007051169 A JP 2007051169A JP 2005235048 A JP2005235048 A JP 2005235048A JP 2005235048 A JP2005235048 A JP 2005235048A JP 2007051169 A JP2007051169 A JP 2007051169A
Authority
JP
Japan
Prior art keywords
weight
rubber
parts
tread
area
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.)
Granted
Application number
JP2005235048A
Other languages
Japanese (ja)
Other versions
JP4762640B2 (en
Inventor
Atsushi Tsuruta
淳 鶴田
Original Assignee
Toyo Tire & Rubber Co Ltd
東洋ゴム工業株式会社
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 Toyo Tire & Rubber Co Ltd, 東洋ゴム工業株式会社 filed Critical Toyo Tire & Rubber Co Ltd
Priority to JP2005235048A priority Critical patent/JP4762640B2/en
Publication of JP2007051169A publication Critical patent/JP2007051169A/en
Application granted granted Critical
Publication of JP4762640B2 publication Critical patent/JP4762640B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pneumatic tire excellent in operation at the time of production and excellent in balance of wet performance and snow performance. <P>SOLUTION: In the pneumatic tire, a tread center area 20 is formed of a rubber composition obtained by compounding a rubber component having -55 to -40°C glass transition point with a large particle-diameter silica having 70-200 m<SP>2</SP>/g BET specific surface area and 60-150 m<SP>2</SP>/g CTAB specific surface area and a silane coupling agent represented by formula (1):(C<SB>n</SB>H<SB>2n+1</SB>O)<SB>3</SB>Si-C<SB>m</SB>H<SB>2m</SB>-S-CO-C<SB>k</SB>H<SB>2k+1</SB>(wherein n is an integer of 1-3; m is an integer of 1-5; k is an integer of 5-9), and a tread shoulder area 22 is formed of a rubber composition obtained by compounding a rubber component having -70 to -60°C glass transition point with a small particle-diameter silica having 210-300 m<SP>2</SP>/g BET specific surface area and 160-300 m<SP>2</SP>/g CTAB specific surface area and the silane coupling agent represented by formula (1). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a pneumatic tire.

  In general, when a pneumatic tire is driven on a slippery road surface such as a wet road surface (wet road surface) or an icy / snow road surface (snow / ice road surface), the frictional resistance between the road surface and the tire tread contact portion decreases, so that sufficient braking is performed. And operability may not be obtained. For this reason, various proposals have been made to improve braking performance and operability on wet road surfaces and icy and snowy road surfaces.

  For example, there is a method of reducing the resilience of tread rubber in order to improve wet performance, which is braking performance and operability on a wet road surface. More specifically, in a rubber composition for forming a tread, there is a method of using a polymer having a high glass transition point as a rubber component or increasing the blending amount of filler and oil.

  There are also techniques for reducing the hardness of the tread rubber in a low temperature region or reducing the storage elastic modulus (E ′) in order to improve the snow performance, which is braking performance and operability on an icy and snowy road surface. More specifically, in a rubber composition for forming a tread, there is a method of using a polymer having a low glass transition point as a rubber component, using silica as a filler, and further combining a silane coupling agent (for example, See Patent Documents 1 and 2 below).

  However, when a polymer having a high glass transition point is used, there is a problem that snow performance is lowered. Conversely, when a polymer having a low glass transition point is used, there is a problem that wet performance is lowered. In addition, when polysulfide silane that is conventionally used as a coupling agent to be used together with silica is used, the workability is greatly inferior, such as an increase in the number of mixing and a decrease in extrusion speed. There is.

Patent Document 3 listed below proposes a new protected mercaptosilane as a silane coupling agent used with silica in order to suppress unacceptable viscosity increase during processing and improve early curing (scorch). . However, this document shows that this protected mercaptosilane is particularly effective in combining wet performance and snow performance in a combination of a specific rubber component and silica without compromising workability of rubber processing. Is not disclosed.
JP 2003-155383 A JP 2003-155384 A Special table 2001-505225 gazette

  This invention is made | formed in view of the above point, and it aims at providing the pneumatic tire which was excellent in workability | operativity at the time of manufacture, and was excellent in wet performance and snow performance balance.

The pneumatic tire according to the present invention has a tread portion composed of a tread central region and a tread shoulder region on the outer side in the tire width direction, and the tread central region has a glass transition point as a whole rubber component. 20 to 200 parts by weight of a large particle size silica having a BET specific surface area of 70 to 200 m 2 / g and a CTAB specific surface area of 60 to 150 m 2 / g is blended with 100 parts by weight of a rubber component having a temperature of −55 ° C. to −40 ° C. Furthermore, the tread shoulder region comprises a first rubber composition containing 2 to 25 parts by weight of a silane coupling agent represented by the following general formula (1) with respect to 100 parts by weight of the large particle size silica. relative to 100 parts by weight of the rubber component glass transition point of -70 ℃ ~-60 ℃ overall rubber component, BET specific surface area 210~300m 2 / g and CT Blended small particle size silica 20 to 200 parts by weight of B specific surface area of 160~300m 2 / g, further, with respect to the small particle size silica 100 parts by weight of a silane coupling agent represented by the following general formula (1) 2 to 25 parts by weight of the second rubber composition.

(C n H 2n + 1 O ) 3 Si-C m H 2m -S-CO-C k H 2k + 1 (1)
In the formula, n is an integer of 1 to 3, m is an integer of 1 to 5, and k is an integer of 5 to 9.

  The first rubber composition using a rubber component having a high glass transition point in combination with a protected mercaptosilane as a silane coupling agent represented by the above formula (1) and a large particle size silica has good wet performance, It has snow performance and is particularly excellent in wet performance. On the other hand, the second rubber composition using a rubber component having a low glass transition point in combination with the above-mentioned protected mercaptosilane and small particle size silica has good wet performance and snow performance. Excellent. By the way, when the tire tread portion is divided into a central region and a shoulder region, generally, the contribution to the wet performance is larger in the central region than the shoulder region, and conversely, the contribution to the snow performance is The shoulder region is larger than the central region. Therefore, by forming the tread center region with the first rubber composition having a strong wet performance orientation and forming the tread shoulder region with the second rubber composition having a strong snow performance orientation, the balance between wet performance and snow performance is achieved. An excellent pneumatic tire can be obtained.

  Further, the use of the specific protected mercaptosilane as a silane coupling agent used in combination with silica does not impair the workability of rubber processing.

  Hereinafter, matters related to the implementation of the present invention will be described in detail.

[First rubber composition (rubber composition for tread central region)]
The rubber component in the first rubber composition is a rubber component having a glass transition point (Tg) in the range of −55 ° C. to −40 ° C. as a whole rubber component. The glass transition point of the rubber component as a whole is obtained by adding the glass transition points of the respective polymers constituting the rubber component according to the weight ratio. The wet performance can be improved by setting the glass transition point of the rubber component as a whole to a high range of −55 ° C. to −40 ° C. Here, when the glass transition point of the rubber component as a whole is less than −55 ° C., the wet performance deteriorates, and conversely when it exceeds −40 ° C., the snow performance deteriorates.

  For the rubber component, various diene rubbers such as styrene butadiene rubber, butadiene rubber, natural rubber, isoprene rubber, styrene isoprene rubber and butadiene isoprene rubber can be used alone or in combination of two or more, preferably It consists of 20 to 60% by weight of styrene butadiene rubber (A) satisfying the following conditions and 80 to 40% by weight of other diene rubber (B).

The styrene butadiene rubber (A) is
−35 ° C. ≦ glass transition point (Tg) ≦ −25 ° C.
20% by weight ≦ styrene content (St) ≦ 40% by weight, and
20% by weight ≦ vinyl content in the butadiene part (Vi) ≦ 60% by weight
The styrene-butadiene copolymer rubber (SBR) satisfying the above, and the wet performance can be improved by using such a high styrene type SBR. If the styrene content is less than 20% by weight, it is difficult to ensure wet performance. Conversely, if the styrene content exceeds 40% by weight, the snow performance and wear resistance are deteriorated. On the other hand, when the glass transition point is lower than −35 ° C., the wet performance tends to be reduced. On the other hand, if the vinyl content in the butadiene portion is less than 20% by weight, the wet performance tends to be lowered. Conversely, if it exceeds 60% by weight, the wear resistance is lowered, which is not preferable. Here, the glass transition point is a value (temperature increase rate 20 ° C./min) measured in accordance with JIS K7121.

  As long as the styrene-butadiene rubber (A) satisfies the above conditions, only one kind may be used, or two or more kinds may be blended and used. The rubber (A) may be one in which the end of the copolymer chain is treated with a tin-based, silicon-based or alkoxysilane-based coupling agent, and the terminal or main chain is a silanol having a silica chain. It may be modified with a functional group (for example, a hydroxyl group or an amino group) having interaction or chemical reactivity with the group.

  Examples of the other diene rubber (B) include styrene butadiene rubber other than the styrene butadiene rubber (A), butadiene rubber, natural rubber, isoprene rubber, styrene isoprene rubber, butadiene isoprene rubber, and the like. It may be used in combination of two or more. Preferably, styrene butadiene rubber or butadiene rubber having a glass transition point of −40 ° C. or lower is used.

The styrene-butadiene rubber (A) and the other diene rubber (B) satisfy the following formula (2) so that the glass transition point as the whole rubber component is −55 to −40 ° C. Blended.

For example, when both the styrene butadiene rubber (A) and the other diene rubber (B) are composed of a single polymer, the glass transition point of the rubber component as a whole is (t A1 × m A1 ) + (t B1 × m B1 ) (where t A1 is the glass transition point of the styrene butadiene rubber (A), and m A1 is the weight ratio of the styrene butadiene rubber (A) to the total rubber component (parts by weight of A / total rubber)). T B1 is the glass transition point of the diene rubber (B), m B1 is the weight ratio of the diene rubber (B) to the total rubber component (part by weight of B / weight of all rubber components). Part).

Silica (hydrous silicic acid) used in the first rubber composition has colloidal characteristics,
70 ≦ BET specific surface area ≦ 200 (m 2 / g), and
60 ≦ CTAB specific surface area ≦ 150 (m 2 / g)
Is a large particle size silica satisfying Snow performance can be improved by using such a large particle size silica. A more preferable lower limit of the BET specific surface area is 90 m 2 / g, and a more preferable upper limit is 130 m 2 / g. The more preferable lower limit of the CTAB specific surface area is 90 m 2 / g, and the more preferable upper limit is 130 m 2 / g. In the present invention, the BET specific surface area is measured by one point value of the BET method. Further, the CTAB specific surface area (cetyltrimethylammonium bromide adsorption specific surface area) is a value measured according to ASTM D3765.

  The said large particle size silica is mix | blended 20-200 weight part with respect to 100 weight part of rubber components. When the blending amount of silica is less than 20 parts by weight, the above-described effects of the present invention cannot be sufficiently exhibited. As for the more preferable compounding quantity of a silica, a minimum is 30 weight part and an upper limit is 80 weight part.

  Although not essential, carbon black may be blended together with silica in the first rubber composition, and the carbon black is blended in an amount of 0 to 100 parts by weight with respect to 100 parts by weight of the rubber component. Silica and carbon black are preferably blended at a ratio of silica / carbon black = 0.7 / 1 to 1/0.

  The silane coupling agent used in the first rubber composition is a protected mercaptosilane represented by the general formula (1). Such protected mercaptosilane can be produced according to the method described in JP-T-2001-505225. The protected mercaptosilane is blended in an amount of 2 to 25 parts by weight with respect to 100 parts by weight of silica in order to sufficiently exhibit the effects of the present invention described above.

  In addition to the above-described components, the first rubber composition includes various additives commonly used in tire rubber compositions such as anti-aging agents, zinc white, stearic acid, softeners, vulcanizing agents, and vulcanization accelerators. An agent can be blended.

  When the first rubber composition is composed of the above, a rubber component having a high Tg is used, and the protected mercaptosilane is used as a silane coupling agent together with a large particle size silica, thereby impairing the workability of rubber processing. Therefore, both wet performance and snow performance can be achieved, and the wet performance is particularly excellent.

[Second rubber composition (rubber composition for tread shoulder region)]
The rubber component in the second rubber composition is a rubber component having a glass transition point of −70 ° C. to −60 ° C. as a whole rubber component. Snow performance can be improved by setting the glass transition point of the rubber component as a whole as low as -70 ° C to -60 ° C. As the polymer constituting the rubber component, various diene rubbers can be used. As in the case of the first rubber composition, 20 to 60% by weight of the styrene butadiene rubber (A) and the other diene are used. What consists of 80-40 weight% of rubber | gum (B) is preferable. The details of these styrene butadiene rubbers (A) and other diene rubbers (B) are as described above, and a description thereof will be omitted.

In the second rubber composition, the styrene butadiene rubber (A) and the other diene rubber (B) have the following formulas such that the glass transition point of the rubber component as a whole is −70 to −60 ° C. It mix | blends so that 3) may be satisfied.

Silica (hydrous silicic acid) used in the second rubber composition has colloidal characteristics,
210 ≦ BET specific surface area ≦ 300 (m 2 / g), and
160 ≦ CTAB specific surface area ≦ 300 (m 2 / g)
The silica having a smaller particle size than the large particle size silica of the first rubber composition satisfies the above. Wet performance can be improved by using such a small particle size silica. The upper limit with a more preferable BET specific surface area is 250 m < 2 > / g. The minimum with a more preferable CTAB specific surface area is 170 m < 2 > / g, and a more preferable upper limit is 250 m < 2 > / g.

  About the compounding quantity of a small particle size silica, combined use with carbon black, a silane coupling agent, and another compounding agent, it is the same as that of the said 1st rubber composition, Description is abbreviate | omitted.

  When the second rubber composition is composed of the above, the use of a rubber component having a low Tg and the use of the protected mercaptosilane as a silane coupling agent together with a small particle size silica impairs the workability of rubber processing. Therefore, both wet performance and snow performance can be achieved, and the snow performance is particularly excellent.

[Pneumatic tire configuration]
A pneumatic tire generally includes a pair of left and right bead portions and sidewall portions, and a tread portion extending between both sidewall portions. In the present invention, the tread portion is partitioned into a tread central region and a tread shoulder region on the outer side in the tire width direction, the tread central region is formed of the first rubber composition, and the tread shoulder region is the second tread shoulder region. It is formed of a rubber composition.

  FIG. 1 shows an example of a tread portion of a pneumatic tire. In the tread portion 10, a tread rubber layer 14 is provided on the outer side in the tire radial direction of the belt layer 12. Consists of a base layer 16 on the inner side in the tire radial direction and an outer cap layer 18. The cap layer 18 includes a tread central region 20 including the tire equator line CL and a tread shoulder region 22 disposed adjacent to the outer side in the tire width direction. The tread central region 20 is the first tread region. It consists of a rubber composition, and the tread shoulder region 22 consists of the second rubber composition. The present invention is not limited to the two-layer structure in which the tread rubber layer 14 has the base layer 16 described above, and may have a single-layer structure.

  Here, the ratio between the tread central region 20 and the tread shoulder region 22 is preferably set as follows in order to exhibit the effect of the present invention. That is, the distance from the tire equator line CL to the tread ground contact E (the outer end of the tread portion 10 that contacts the road surface when a standard load (75% of the maximum load specified by JATMA) is applied to the tire) is x. When the boundary line B between the tread central region 20 and the tread shoulder region 22 is preferably set within a range of 0.2x to 0.8x from the tire equator line CL, more preferably 0.4x to 0.7x. It is set within the range.

  Further, the boundary line B between the two regions 20 and 22 is preferably set in the main groove 24 extending in the tire circumferential direction. Therefore, for example, in the case of a tire having three or more main grooves, the outer two It is preferable that a shoulder rib on the outer side in the tire width direction than the main groove 24 is the tread shoulder region 22, and a rib on the inner side of the two main grooves 24 is the tread central region 20. As described above, by arranging the boundary line B between the two regions 20 and 22 in the groove such as the main groove 24, the rubber interface of both the regions 20 and 22 appears on the grounding surface even if the tread rubber is worn. Can be prevented and durability can be improved.

  When the pneumatic tire is composed of the above, the first rubber composition having particularly excellent wet performance is disposed in the tread central region 20 having a large contribution to the wet performance, and the second rubber composition having particularly excellent snow performance is provided as snow. Since it is arranged in the tread shoulder region 22 that greatly contributes to performance, the balance between wet performance and snow performance is excellent. Therefore, the pneumatic tire of the present invention is particularly suitable as various winter tires including snow tires.

  Examples of the present invention will be described below, but the present invention is not limited to these examples.

  Using a Banbury mixer, 12 types of rubber compositions A to L were prepared according to the composition shown in Table 1 below. Among these, B and C are implementation blends that satisfy the constituent requirements of the first rubber composition, and I and J are implementation blends that satisfy the constituent requirements of the second rubber composition. The detail of each component of Table 1 is as follows.

SBR1: Asahi Kasei styrene butadiene rubber “Toughden E-50” (glass transition point = −34 ° C., styrene content = 35.5 wt%, vinyl content in butadiene portion = 33 wt%, rubber polymer 100 wt% Oil-extended rubber containing 37.5 parts by weight of oil with respect to parts)
SBR2: Styrene butadiene rubber “NS422” manufactured by ZEON (glass transition point = −35 ° C., styrene content = 40% by weight, vinyl content in butadiene part = 22% by weight, 100 parts by weight of rubber polymer Oil-extended rubber containing 37.5 parts by weight of oil)
SBR3: Styrene butadiene rubber “SL574” manufactured by JSR (glass transition point = −43 ° C., styrene content = 15 wt%, vinyl content in butadiene portion = 57 wt%)
BR: butadiene rubber “BR01” manufactured by JSR (glass transition point = −102 ° C.).

・ Carbon black: Carbon black N234 "Seast 7H" made by Tokai Carbon
Silica 1: “Ultrasil 7000GR” manufactured by Degussa (BET specific surface area = 170 m 2 / g, CTAB specific surface area = 160 m 2 / g)
Silica 2: “Zeopol 8715” manufactured by Huber (BET specific surface area = 109 m 2 / g, CTAB specific surface area = 118 m 2 / g)
Silica 3: Silica produced by the method described in Japanese Patent No. 3304096 (BET specific surface area = 220 m 2 / g, CTAB specific surface area = 195 m 2 / g).

・ Oil: “JOMO Process X-140” manufactured by Japan Energy
General-purpose coupling agent: bis- (3-triethoxysilylpropyl) disulfide, “Si-75” manufactured by Degussa
Protected mercaptosilane: coupling agent represented by the above formula (1) (n = 2, m = 3, k = 7), “NXT” manufactured by GE Silicones.

  Moreover, in each rubber composition, as a common blend, 2 parts by weight of stearic acid (“Lunac S-20” manufactured by Kao) and zinc white (“Zinc Hana Class 1” manufactured by Mitsui Mining & Mining) are used for 100 parts by weight of the rubber component. ) 2 parts by weight, anti-aging agent (Sumitomo Chemical "Antigen 6C") 2 parts, wax (Ouchi Shinsei Chemical "Sannok N") 2 parts, vulcanization accelerator (diphenyl guanidine) 0.8 weight Parts, 1.2 parts by weight of a vulcanization accelerator (“Soxinol CZ” manufactured by Sumitomo Chemical) and 1.5 parts by weight of sulfur (“Powder Sulfur” manufactured by Tsurumi Chemical) were blended.

The processability of each rubber composition obtained was evaluated. The processability was expressed as an index with the Mooney viscosity measured according to JIS K6300 and the value of the implementation formulation B as 100. A smaller index indicates a lower viscosity, that is, better workability.

  By using each rubber composition obtained as a rubber composition of the center region 20 and the shoulder region 22 of the tread cap layer 18 shown in FIG. A pneumatic radial tire having a tire size of 195 / 65R15 was produced. At that time, the distance from the tire equator line CL to the boundary line B between the regions 20 and 22 was set to 0.6x, where x is the distance from the tire equator line CL to the tread ground contact edge E.

  About each produced tire, wet braking performance, snow braking performance, wet operativity, and snow operativity were evaluated. Each evaluation method is as follows.

-Wet braking performance: Four 2,000 cc domestic passenger cars are equipped with the above tires, run on a water surface with water depth of 2 to 3 mm, operate ABS at 90 km / h, and brake when decelerating to 20 km / h The distance was measured. The value of Comparative Example 1 is expressed as an index, which is 100. The larger the index, the shorter the braking distance and the better the wet braking performance.

Snow braking performance: Four tires were mounted on a 2000cc domestic passenger car, running on an icy and snowy road surface, the ABS was operated at a speed of 60km / h, and the braking distance when decelerating to 20km / h was measured. The value of Comparative Example 1 is expressed as an index, which is 100. The larger the index, the shorter the braking distance and the better the snow braking performance.

-Wet operability and snow operability: It was a sensory (feeling) evaluation of steering stability by a test driver, and was evaluated by a 10-point method with Comparative Example 1 as 5 points. The higher the value, the better.

  The results are as shown in Table 2, and the center region and the shoulder region correspond to Comparative Example 1 in which the entire tread was made into the implementation formulation B for the central region and Comparative Example 2 made the implementation formulation I for the shoulder region, respectively. The wet performance and snow performance were further improved in the tires of Examples 1 to 4 formed by the implementation formulation. On the other hand, in Comparative Examples 3 to 15 using the comparative formulation in either one or both of the central region and the shoulder region, either or both of wet performance and snow performance were deteriorated compared to Comparative Example 1. .

It is a half sectional view of a tread part of a pneumatic tire concerning an embodiment.

Explanation of symbols

10 …… Tread part 20 …… Tread center area 22 …… Tread shoulder area

Claims (2)

  1. A pneumatic tire having a tread portion composed of a tread central region and a tread shoulder region on the outer side in the tire width direction,
    The tread central region, relative to 100 parts by weight of the rubber component glass transition point of -55 ℃ ~-40 ℃ overall rubber component, BET specific surface area 70~200m 2 / g and a CTAB specific surface area 60~150m 2 / 20 to 200 parts by weight of g of large particle size silica is further blended, and further 2 to 25 parts by weight of a silane coupling agent represented by the following general formula (1) is blended with respect to 100 parts by weight of the large particle size silica. A first rubber composition,
    The tread shoulder region has a glass transition point of the entire rubber component per 100 parts by weight of the rubber component is -70 ℃ ~-60 ℃, BET specific surface area 210~300m 2 / g and a CTAB specific surface area 160~300m 2 / 20 to 200 parts by weight of silica having a small particle size of 2 g is blended, and further, 2 to 25 parts by weight of a silane coupling agent represented by the following general formula (1) is blended with respect to 100 parts by weight of the small particle size silica. A pneumatic tire comprising the second rubber composition.
    (C n H 2n + 1 O ) 3 Si-C m H 2m -S-CO-C k H 2k + 1 (1)
    (In the formula, n is an integer of 1 to 3, m is an integer of 1 to 5, and k is an integer of 5 to 9)
  2. The rubber component of the first rubber composition and the rubber component of the second rubber composition both have a glass transition point of −35 to −25 ° C., a styrene content of 20 to 40% by weight, and a vinyl content in the butadiene part. 2. The pneumatic tire according to claim 1, comprising 20 to 60% by weight of styrene butadiene rubber having an amount of 20 to 60% by weight and 80 to 40% by weight of another diene rubber.
JP2005235048A 2005-08-12 2005-08-12 Pneumatic tire Active JP4762640B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005235048A JP4762640B2 (en) 2005-08-12 2005-08-12 Pneumatic tire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005235048A JP4762640B2 (en) 2005-08-12 2005-08-12 Pneumatic tire

Publications (2)

Publication Number Publication Date
JP2007051169A true JP2007051169A (en) 2007-03-01
JP4762640B2 JP4762640B2 (en) 2011-08-31

Family

ID=37915836

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2005235048A Active JP4762640B2 (en) 2005-08-12 2005-08-12 Pneumatic tire

Country Status (1)

Country Link
JP (1) JP4762640B2 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008260806A (en) * 2007-04-10 2008-10-30 Bridgestone Corp Snow tire
JP2009001665A (en) * 2007-06-21 2009-01-08 Sumitomo Rubber Ind Ltd Rubber composition for tread, and pneumatic tire using the same
JP2009007449A (en) * 2007-06-27 2009-01-15 Sumitomo Rubber Ind Ltd Wing rubber composition and pneumatic tire
JP2012121936A (en) * 2010-12-06 2012-06-28 Yokohama Rubber Co Ltd:The Rubber composition for tire tread
JP2012136581A (en) * 2010-12-24 2012-07-19 Sumitomo Rubber Ind Ltd Rubber composition for tire and studless tire
JP2017149407A (en) * 2016-02-22 2017-08-31 ハンコック タイヤ カンパニー リミテッド Tire tread and method for manufacturing the same
WO2020065903A1 (en) * 2018-09-28 2020-04-02 Compagnie Generale Des Etablissements Michelin A tire for multi performance

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4971614B2 (en) * 2005-09-16 2012-07-11 東洋ゴム工業株式会社 Pneumatic tire

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59124414A (en) * 1982-12-30 1984-07-18 Yokohama Rubber Co Ltd:The Pneumatic tire for ice and snow covered road
JPH03186403A (en) * 1989-12-18 1991-08-14 Yokohama Rubber Co Ltd:The Pneumatic tire for use on ice-snow road
JPH061120A (en) * 1992-06-18 1994-01-11 Sumitomo Rubber Ind Ltd Pneumatic tire
JPH09136997A (en) * 1995-11-15 1997-05-27 Bridgestone Corp Pneumatic radial tire
JP2001047815A (en) * 1999-05-31 2001-02-20 Bridgestone Corp Pneumatic tire
JP2001505225A (en) * 1997-08-21 2001-04-17 シーケイ・ウイトコ・コーポレーション Protected mercaptosilane coupling agent for rubber containing filler
JP2002052906A (en) * 2000-08-11 2002-02-19 Bridgestone Corp Pneumatic tire
JP2004256611A (en) * 2003-02-25 2004-09-16 Bridgestone Corp Pneumatic radial tire for high speed and heavy load
WO2005049493A1 (en) * 2003-11-18 2005-06-02 The Yokohama Rubber Co., Ltd. Silica treated with silane coupling agent and rubber composition containing same
JP2005263998A (en) * 2004-03-18 2005-09-29 Toyo Tire & Rubber Co Ltd Rubber composition for pneumatic tire and pneumatic tire
JP2006077097A (en) * 2004-09-08 2006-03-23 Toyo Tire & Rubber Co Ltd Rubber composition for pneumatic tire, and pneumatic tire

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59124414A (en) * 1982-12-30 1984-07-18 Yokohama Rubber Co Ltd:The Pneumatic tire for ice and snow covered road
JPH03186403A (en) * 1989-12-18 1991-08-14 Yokohama Rubber Co Ltd:The Pneumatic tire for use on ice-snow road
JPH061120A (en) * 1992-06-18 1994-01-11 Sumitomo Rubber Ind Ltd Pneumatic tire
JPH09136997A (en) * 1995-11-15 1997-05-27 Bridgestone Corp Pneumatic radial tire
JP2001505225A (en) * 1997-08-21 2001-04-17 シーケイ・ウイトコ・コーポレーション Protected mercaptosilane coupling agent for rubber containing filler
JP2001047815A (en) * 1999-05-31 2001-02-20 Bridgestone Corp Pneumatic tire
JP2002052906A (en) * 2000-08-11 2002-02-19 Bridgestone Corp Pneumatic tire
JP2004256611A (en) * 2003-02-25 2004-09-16 Bridgestone Corp Pneumatic radial tire for high speed and heavy load
WO2005049493A1 (en) * 2003-11-18 2005-06-02 The Yokohama Rubber Co., Ltd. Silica treated with silane coupling agent and rubber composition containing same
JP2005263998A (en) * 2004-03-18 2005-09-29 Toyo Tire & Rubber Co Ltd Rubber composition for pneumatic tire and pneumatic tire
JP2006077097A (en) * 2004-09-08 2006-03-23 Toyo Tire & Rubber Co Ltd Rubber composition for pneumatic tire, and pneumatic tire

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008260806A (en) * 2007-04-10 2008-10-30 Bridgestone Corp Snow tire
JP2009001665A (en) * 2007-06-21 2009-01-08 Sumitomo Rubber Ind Ltd Rubber composition for tread, and pneumatic tire using the same
JP2009007449A (en) * 2007-06-27 2009-01-15 Sumitomo Rubber Ind Ltd Wing rubber composition and pneumatic tire
JP2012121936A (en) * 2010-12-06 2012-06-28 Yokohama Rubber Co Ltd:The Rubber composition for tire tread
JP2012136581A (en) * 2010-12-24 2012-07-19 Sumitomo Rubber Ind Ltd Rubber composition for tire and studless tire
JP2017149407A (en) * 2016-02-22 2017-08-31 ハンコック タイヤ カンパニー リミテッド Tire tread and method for manufacturing the same
WO2020065903A1 (en) * 2018-09-28 2020-04-02 Compagnie Generale Des Etablissements Michelin A tire for multi performance

Also Published As

Publication number Publication date
JP4762640B2 (en) 2011-08-31

Similar Documents

Publication Publication Date Title
US9018297B2 (en) Rubber composition for tread, and pneumatic tire
JP4835769B2 (en) Rubber composition for tire tread
US6761198B2 (en) Pneumatic tire having lug and groove configuration extending from tread over at least 30% of sidewall
DE60300674T2 (en) Tire having a tread of a cis 1,4-polybutadiene-rich rubber composition comprising a functionalized styrene / butadiene elastomer, silica and a coupling agent
JP5097766B2 (en) Rubber composition for tread and pneumatic tire
DE602006000323T2 (en) Rubber composition and tire with tire tread containing such
EP1033265B1 (en) Tire with reinforced rubber sidewall
US8044131B2 (en) Rubber composition for tread and tire comprising thereof
KR101814800B1 (en) Tire rubber composition and pneumatic tire
DE60200746T2 (en) rubber composition
JP4663687B2 (en) Rubber composition and tire having tread and / or sidewall using the same
US8293833B2 (en) Rubber composition and tire having tread and/or sidewall using same
CN104129232B (en) Pneumatic tire
EP0738613B1 (en) Tire with cap-base construction tread
JP5154071B2 (en) Rubber composition and tire using the same
JP4409971B2 (en) Rubber composition for tire tread
JP5543226B2 (en) Rubber composition for tire and pneumatic tire
JP4666089B2 (en) Rubber composition for tire tread and pneumatic tire
JP5503330B2 (en) Tires for motorcycles
US10273352B2 (en) Pneumatic tire
JP4823846B2 (en) Rubber composition and tire having tread and sidewall using the same
KR101599463B1 (en) Rubber composition for side rubber reinforcement layer of run-flat tire
US8329799B2 (en) Rubber composition for studless tire and studless tire
JP4566888B2 (en) Rubber composition and tire having tread using the same
JP4849176B2 (en) Rubber composition for tire tread and pneumatic tire using the same

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20080604

TRDD Decision of grant or rejection written
A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20110523

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20110531

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20110608

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140617

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Ref document number: 4762640

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

S531 Written request for registration of change of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313531

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

S533 Written request for registration of change of name

Free format text: JAPANESE INTERMEDIATE CODE: R313533

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350