JPH02208336A - Rubber composition for tire tread - Google Patents
Rubber composition for tire treadInfo
- Publication number
- JPH02208336A JPH02208336A JP1026723A JP2672389A JPH02208336A JP H02208336 A JPH02208336 A JP H02208336A JP 1026723 A JP1026723 A JP 1026723A JP 2672389 A JP2672389 A JP 2672389A JP H02208336 A JPH02208336 A JP H02208336A
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- ice
- rubber composition
- pts
- parts
- 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
Links
- 229920001971 elastomer Polymers 0.000 title claims abstract description 37
- 239000005060 rubber Substances 0.000 title claims abstract description 37
- 239000000203 mixture Substances 0.000 title claims abstract description 22
- 239000006229 carbon black Substances 0.000 claims abstract description 7
- 239000002245 particle Substances 0.000 claims abstract description 4
- 239000011148 porous material Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 5
- 238000004073 vulcanization Methods 0.000 abstract description 5
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 244000043261 Hevea brasiliensis Species 0.000 abstract description 2
- 239000011159 matrix material Substances 0.000 abstract description 2
- 229920003052 natural elastomer Polymers 0.000 abstract description 2
- 229920001194 natural rubber Polymers 0.000 abstract description 2
- 229920002857 polybutadiene Polymers 0.000 abstract description 2
- 239000010985 leather Substances 0.000 abstract 1
- 229920003048 styrene butadiene rubber Polymers 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 17
- 238000005299 abrasion Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000013329 compounding Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000004014 plasticizer Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 229920002367 Polyisobutene Polymers 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 230000036772 blood pressure Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000012510 hollow fiber Substances 0.000 description 1
- 239000010954 inorganic particle Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229920001195 polyisoprene Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、氷上摩擦性能（アイススキツド性能）の改良
されたタイヤトレッド用ゴム組成物に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rubber composition for a tire tread that has improved friction performance on ice (ice skid performance).
従来より積雪寒冷地において冬期時に自動車が走行する
場合には、タイヤにスパイクを打ち込んだスパイクタイ
ヤを用いるか又はタイヤの外周にタイヤチェーンを装着
して、雪上路や凍結路での安全性を確保している。しか
しながら、スパイクタイヤやタイヤチェーンを装着した
タイヤでは、道路の摩耗や損傷が発生し易く、それが粉
塵となって公害を引き起こし、これが大きな環境問題と
なっている。Conventionally, when driving in winter in cold, snowy regions, safety on snowy and icy roads is ensured by using spiked tires with spikes driven into the tires or by attaching tire chains to the outer circumference of the tires. are doing. However, tires equipped with spiked tires or tire chains are susceptible to road wear and damage, which turns into dust and causes pollution, which is a major environmental problem.
このような安全問題と環境問題とを解決するために、ス
パイクやチェーンを使用せず、雪上および氷上における
制動性および駆動性能を有したスタッドレスタイヤが現
在急速に普及しつつある。In order to solve such safety and environmental problems, studless tires that do not use spikes or chains and have braking and driving performance on snow and ice are rapidly becoming popular.
かかるスタッドレスタイヤの氷上における制動性、駆動
性能を改良するために従来から種々の提案が試みられて
いる。例えば、特開昭５５−１３５１４９号公報、特開
昭５８−１９９２０３号公報、特開昭６０−１３７９４
５号公報に開示されているように、トレッドゴムに軟化
剤や可塑剤を多量配合したゴム組成物を用いることによ
り低温時の硬さを下げて低温特性を改良する方法等が知
られているが、軟化剤、可塑剤を多量配合すると氷上性
能は改良されるものの、−船路での耐摩耗性が大幅に低
下したり、多量配合された軟化剤、可塑剤のためにゴム
の発熱性が増加し、タイヤが走行中にセパレーションを
誘起し易い等の欠点がある。また、特開昭６０−４４５
３８号公報、特開昭５９−１４２２３６号公報、特開昭
５３−１３３２４８号公報には、トレンドゴム組成物に
高硬度ゴムを配合して分散させたり、無機質の粒子や有
機質の単繊維を配合して分散させたりして、氷上路面と
の摩擦力を改良する方法が開示されているが、この場合
、分散物の硬さ不足から期待されるスパイク効果が十分
に発揮できない。また、ゴム組成物そのものに通常よく
使用される発泡剤を配合し、ゴム組成物自身を発泡させ
ることも考えられるが、やはり耐摩耗性が低下してしま
い好ましくない。Various proposals have been made to improve the braking and driving performance of such studless tires on ice. For example, JP-A-55-135149, JP-A-58-199203, JP-A-60-13794.
As disclosed in Publication No. 5, a method is known in which low-temperature properties are improved by lowering the hardness at low temperatures by using a rubber composition containing a large amount of softener or plasticizer in tread rubber. However, although the on-ice performance is improved when a large amount of softeners and plasticizers are blended, - the abrasion resistance in shipping lanes is significantly reduced, and the heat generation of the rubber is increased due to the large amount of softeners and plasticizers blended. There are drawbacks such as an increase in the number of tires and the tendency to cause separation while the tire is running. Also, JP-A-60-445
No. 38, JP-A No. 59-142236, and JP-A No. 53-133248 disclose methods in which high hardness rubber is blended and dispersed in a trend rubber composition, or inorganic particles or organic single fibers are blended into the trend rubber composition. A method has been disclosed in which the frictional force with the icy road surface is improved by dispersing the dispersed material, but in this case, the expected spike effect cannot be sufficiently exerted due to the lack of hardness of the dispersed material. It is also possible to foam the rubber composition itself by adding a commonly used foaming agent to the rubber composition itself, but this is also undesirable because it lowers the abrasion resistance.
本発明は、スパイク効果を十分に発揮できる、氷上摩擦
性能の改良されたタイヤトレッド用ゴム組成物を提供す
ることを目的とする。An object of the present invention is to provide a rubber composition for a tire tread that can sufficiently exhibit the spike effect and has improved friction performance on ice.
このため、本発明は、原料ゴム１００重量部に対し、カ
ーボンブラック４０〜９０重量部、および平均粒径２ｍ
ｍ以下の多孔質物質を４〜３０重量部配合してなるタイ
ヤトレンド用ゴム組成物を要旨とするものである。Therefore, the present invention requires 40 to 90 parts by weight of carbon black and an average particle size of 2 m to 100 parts by weight of raw rubber.
The gist of the present invention is a rubber composition for tire trends, which contains 4 to 30 parts by weight of a porous material with a diameter of less than m.
以下、この手段につき詳しく説明する。This means will be explained in detail below.
（１）原料ゴム。(1) Raw rubber.
通常のゴムを用いればよ（、特に限定されるものではな
いが、好ましくは、天然ゴム、ポリイソプレンゴム、ポ
リブタジェンゴム、ポリイソブチレンゴム、スチレン含
有量０〜２８重量％のスチレンーブクジエン共重合体ゴ
ム或いはこれらのブレンドが用いられる。Ordinary rubber may be used (although not particularly limited, preferably natural rubber, polyisoprene rubber, polybutadiene rubber, polyisobutylene rubber, styrene-butylene rubber containing 0 to 28% by weight of styrene). Copolymer rubbers or blends thereof are used.
（２） カーボンブラック。(2) Carbon black.
通常のトレッド用として使用されるものであればよく、
その種類は限定されるものでない。カーボンブラックの
配合量は、原料ゴム１００重量部に対して４０〜９０重
量部である。４０重量部未満では補強性に劣り、耐摩耗
性が低下する。一方、９０重量部を超えると発熱が高く
なり、好ましくない。It is fine as long as it is used for normal treads.
The type is not limited. The blending amount of carbon black is 40 to 90 parts by weight based on 100 parts by weight of the raw rubber. If it is less than 40 parts by weight, reinforcing properties will be poor and abrasion resistance will decrease. On the other hand, if it exceeds 90 parts by weight, heat generation will increase, which is not preferable.
（３）多孔質物質。(3) Porous materials.
特定されるものではないが、例えば、スポンジ、皮、多
孔質中空糸（現在、例えば浄水器に使用されている）、
ガラスバルーン、シラスバルーンなどである。Although not specified, examples include sponges, skins, porous hollow fibers (currently used in e.g. water purifiers),
These include glass balloons and glass balloons.
多孔質物質の配合量は、原料ゴム１００重量部に対して
４〜３０重量部である。４重量部未満では氷上摩擦力の
向上をはかることができず、一方、３０重量部を超える
と耐摩耗性が低下するからである。The blending amount of the porous material is 4 to 30 parts by weight based on 100 parts by weight of the raw rubber. If the amount is less than 4 parts by weight, the frictional force on ice cannot be improved, while if it exceeds 30 parts by weight, the abrasion resistance will decrease.
この多孔質物質の形状は、棒状、立方体状、粒状或いは
これらに類似した形態のもので、平均粒径は２ｍｍ以下
、好ましくは１ｍｍ以下である。２ｎ＋ｎ＋を超えると
トレンド部の耐摩耗性が著しく低下するからである。The shape of this porous material is rod-like, cubic, granular, or similar, and the average particle size is 2 mm or less, preferably 1 mm or less. This is because if it exceeds 2n+n+, the wear resistance of the trend portion will be significantly reduced.
（４）本発明のゴム組成物には、上記の原料ゴムおよび
配合剤以外に、軟化剤、加硫剤、加硫促進剤、加硫助剤
、老化防止剤等の配合剤が適宜添加されていてもよい。(4) In addition to the raw material rubber and compounding agents described above, compounding agents such as a softener, a vulcanizing agent, a vulcanization accelerator, a vulcanization aid, and an anti-aging agent may be appropriately added to the rubber composition of the present invention. You can leave it there.
なお、本発明のゴム組成物から上記多孔質物質を除いた
配合物（すなわち、マトリックス）の加硫後の硬度は、
ＪＩＳ Ｈｓ ＠ ２５℃５５〜７０ である。In addition, the hardness after vulcanization of the compound (i.e., matrix) obtained by removing the above-mentioned porous substance from the rubber composition of the present invention is:
JIS Hs @ 25°C 55-70.
ところで、氷雪路面ではタイヤの走行時の摩擦熱により
氷の融解が起こり、タイヤ踏面と氷の間にたえず水膜が
介在する状態となるため、摩擦力が著しく低下してしま
う。このような状況のもとて摩擦力を高めるには、水膜
を短時間で除去することが必要となる。本発明のゴム組
成物をタイヤトレッドに用いた場合には、トレッド中に
多孔質物質が混在してそれがトレッド表面に部分的に表
われているために、該多孔質物質により水膜を吸い取っ
て路面から短時間のうちに該水膜を除去することができ
る。これにより、路面の摩擦係数（ミュー）が大となる
。By the way, on an icy and snowy road surface, ice melts due to frictional heat generated when tires run, and a water film is constantly interposed between the tire tread surface and the ice, resulting in a significant decrease in frictional force. In order to increase the frictional force under such circumstances, it is necessary to remove the water film in a short time. When the rubber composition of the present invention is used in a tire tread, porous substances are mixed in the tread and are partially exposed on the tread surface, so the porous substances absorb the water film. The water film can be removed from the road surface in a short time. This increases the friction coefficient (mu) of the road surface.
以下に実施例および比較例を示す。Examples and comparative examples are shown below.
表１に示される配合内容（重量部）の本発明のゴム組成
物（実施例１〜４）と本発明外のゴム組成物（比較例１
〜５）を加硫して（加硫条件；１５０℃×２５分）、氷
上摩擦力および耐摩耗性を下記により評価した。この結
果を表１に示す。表１から、本発明のゴム組成物が氷上
摩擦性能（氷上摩擦力）および耐摩耗性に優れているこ
とが判る。Rubber compositions of the present invention (Examples 1 to 4) and rubber compositions other than the present invention (Comparative Example 1) having the compounding contents (parts by weight) shown in Table 1.
~5) was vulcanized (vulcanization conditions: 150°C x 25 minutes), and the frictional force on ice and abrasion resistance were evaluated as follows. The results are shown in Table 1. Table 1 shows that the rubber composition of the present invention has excellent on-ice friction performance (on-ice friction force) and abrasion resistance.
氷上輩撒力：
ブリティソシュポータブルスキッドテスターを使用。蒸
溜水を用いて調整した氷上路面（路面温度−８°Ｃ）、
サンプル温度−５℃にて実施。比較例１を１００として
指数表示。指数大なるほど摩擦力は大。Ice test: Use Briti Soche Portable Skid Tester. Ice road surface adjusted using distilled water (road surface temperature -8°C),
Conducted at a sample temperature of -5°C. Displayed as an index with Comparative Example 1 set as 100. The larger the index, the greater the frictional force.
訃至圧血：
ピコ式摩耗試験機を用い、荷重１１！ｂにて実施。比較
例１を１００として指数表示。指数大なるほど耐摩耗性
は良好である。Mortality blood pressure: Using a Pico abrasion tester, load 11! Conducted at b. Displayed as an index with Comparative Example 1 set as 100. The larger the index, the better the wear resistance.
（重置以下余白）
〔発明の効果〕
以上説明したように本発明によれば、原料ゴムに特定量
のカーボンブラックと特定量の多孔質物質を配合してな
るゴム組成物は氷上路面での摩擦力を向上させることが
できる。(Blank below overlapping) [Effects of the Invention] As explained above, according to the present invention, a rubber composition formed by blending a specific amount of carbon black and a specific amount of a porous material with raw rubber can be used on icy roads. Frictional force can be improved.
したがって、本発明のゴム組成物は、特に雪氷路面走行
用のタイヤトレッド材料として好適に用いられる。Therefore, the rubber composition of the present invention is particularly suitable for use as a tire tread material for running on snowy and icy roads.
Claims (1)
９０重量部、および平均粒径２ｍｍ以下の多孔質物質を
４〜３０重量部配合してなるタイヤトレッド用ゴム組成
物。40 to 40 parts of carbon black per 100 parts by weight of raw rubber
A rubber composition for a tire tread, comprising 90 parts by weight and 4 to 30 parts by weight of a porous material having an average particle size of 2 mm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1026723A JP2676544B2 (en) | 1989-02-07 | 1989-02-07 | Rubber composition for tire tread |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1026723A JP2676544B2 (en) | 1989-02-07 | 1989-02-07 | Rubber composition for tire tread |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02208336A true JPH02208336A (en) | 1990-08-17 |
| JP2676544B2 JP2676544B2 (en) | 1997-11-17 |
Family
ID=12201250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1026723A Expired - Lifetime JP2676544B2 (en) | 1989-02-07 | 1989-02-07 | Rubber composition for tire tread |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2676544B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6730710B2 (en) | 2001-12-14 | 2004-05-04 | The Yokohama Rubber Co, Ltd. | Rubber composition for tire and process of production thereof |
| JP2006298215A (en) * | 2005-04-21 | 2006-11-02 | Toyo Tire & Rubber Co Ltd | Pneumatic tire |
| JP2018100342A (en) * | 2016-12-20 | 2018-06-28 | 東洋ゴム工業株式会社 | Tire rubber composition, tire and method for producing the same |
| JP2020169239A (en) * | 2019-04-01 | 2020-10-15 | 横浜ゴム株式会社 | Rubber composition and studless tire therewith |
-
1989
- 1989-02-07 JP JP1026723A patent/JP2676544B2/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6730710B2 (en) | 2001-12-14 | 2004-05-04 | The Yokohama Rubber Co, Ltd. | Rubber composition for tire and process of production thereof |
| JP2006298215A (en) * | 2005-04-21 | 2006-11-02 | Toyo Tire & Rubber Co Ltd | Pneumatic tire |
| JP2018100342A (en) * | 2016-12-20 | 2018-06-28 | 東洋ゴム工業株式会社 | Tire rubber composition, tire and method for producing the same |
| WO2018116622A1 (en) * | 2016-12-20 | 2018-06-28 | 東洋ゴム工業株式会社 | Rubber composition for tire, tire, and production methods therefor |
| CN109804013A (en) * | 2016-12-20 | 2019-05-24 | 通伊欧轮胎株式会社 | Rubber composition for tire, tire and their preparation method |
| JP2020169239A (en) * | 2019-04-01 | 2020-10-15 | 横浜ゴム株式会社 | Rubber composition and studless tire therewith |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2676544B2 (en) | 1997-11-17 |
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