JPH05132583A - Tread rubber composition for tire - Google Patents
Tread rubber composition for tireInfo
- Publication number
- JPH05132583A JPH05132583A JP3297115A JP29711591A JPH05132583A JP H05132583 A JPH05132583 A JP H05132583A JP 3297115 A JP3297115 A JP 3297115A JP 29711591 A JP29711591 A JP 29711591A JP H05132583 A JPH05132583 A JP H05132583A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- rubber composition
- performance
- styrene
- pts
- 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
- 239000000203 mixture Substances 0.000 title claims abstract description 20
- 229920001971 elastomer Polymers 0.000 title claims description 15
- 239000005060 rubber Substances 0.000 title claims description 15
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 claims abstract description 20
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229920002554 vinyl polymer Polymers 0.000 claims abstract description 10
- 239000006229 carbon black Substances 0.000 claims abstract description 5
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 10
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 2
- 239000010692 aromatic oil Substances 0.000 abstract 1
- 239000002174 Styrene-butadiene Substances 0.000 description 7
- 229920000642 polymer Polymers 0.000 description 6
- 238000002156 mixing Methods 0.000 description 4
- 238000004073 vulcanization Methods 0.000 description 3
- 239000005062 Polybutadiene Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000008094 contradictory effect Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 230000009477 glass transition Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920002857 polybutadiene Polymers 0.000 description 2
- 235000021355 Stearic acid Nutrition 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 235000014692 zinc oxide Nutrition 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Landscapes
- Tires In General (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はタイヤ用トレッドゴム組
成物、さらに詳しくは、乗用車用タイヤに適したトレッ
ドゴム組成物に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tread rubber composition for tires, and more particularly to a tread rubber composition suitable for passenger car tires.
【０００２】[0002]
【従来の技術】近年、高性能乗用車のエンジンパワーが
年々増加するに伴い、タイヤに対し高いグリップ性能が
要求されている。この要求に対応するために、トレッド
配合物のtanδのピーク温度を上げる（ポリマーのガラ
ス転移温度（Ｔg）を上げる）ことにより対応してきて
いるが、ポリマーのガラス転移温度を上げることの弊害
として低温脆化性能の著しい低下が問題となってきた。
この問題を解消するため、最近では、ブタジエンゴム
（ＢＲ）を混入した配合物をタイヤのトレッド部分に使
用して、低温脆化性能を向上する方法も提案されている
が、グリップ性能の低下も伴っており、高グリップ性と
低温脆化性能の相反する性能が問題となってきている。2. Description of the Related Art In recent years, as engine power of high-performance passenger cars has increased year by year, tires are required to have high grip performance. In order to meet this requirement, the peak temperature of tan δ of the tread compound has been raised (the glass transition temperature (Tg) of the polymer has been raised). However, as an adverse effect of raising the glass transition temperature of the polymer, low temperature A significant decrease in brittleness performance has become a problem.
In order to solve this problem, a method has recently been proposed in which a compound containing butadiene rubber (BR) is used in a tread portion of a tire to improve low temperature embrittlement performance, but the grip performance is also deteriorated. Accordingly, the contradictory performance of high grip performance and low temperature embrittlement performance has become a problem.
【０００３】[0003]
【発明が解決しようとする課題】本発明の課題は、グリ
ップ性能と、コントロール性能や低温脆化性という二律
背反する問題点を、トレッドゴム組成物の配合処方の観
点から解決することである。SUMMARY OF THE INVENTION An object of the present invention is to solve the contradictory problems of grip performance, control performance and low temperature embrittlement from the viewpoint of compounding formulation of the tread rubber composition.
【０００４】[0004]
【課題を解決するための手段】本発明は、スチレン量４
０〜４５重量％、ブタジエン部分のビニル量５〜２０重
量％のスチレンブタジエンゴム（以下、ＳＢＲという）
（Ｉ）およびスチレン量５〜２０重量％、ブタジエン部
分のビニル量５〜２０重量％のＳＢＲ（II）を合計で１
００重量部含有し、さらに平均粒径１５〜２２μｍのカ
ーボンブラックを７５〜１１０重量部およびアロマオイ
ルを３５〜８０重量部含有してなり、ＳＢＲ（II）の配
合割合が１５〜２５重量部であることを特徴とするトレ
ッドゴム組成物を提供するものである。The present invention provides a styrene content of 4
Styrene-butadiene rubber having 0 to 45% by weight and vinyl content of butadiene portion of 5 to 20% by weight (hereinafter referred to as SBR)
(I) and SBR (II) containing 5 to 20% by weight of styrene and 5 to 20% by weight of vinyl in the butadiene portion for a total of 1
It contains 100 parts by weight of carbon black, 75 to 110 parts by weight of carbon black having an average particle size of 15 to 22 μm, and 35 to 80 parts by weight of aroma oil. The blending ratio of SBR (II) is 15 to 25 parts by weight. The present invention provides a tread rubber composition characterized by being present.
【０００５】本発明によれば、前記成分を組合せること
により、高いグリップ性能を有すると共に、グリップ限
界時のコントロール性能および低温脆化性能に優れたト
レッドゴム組成物が得られる。According to the present invention, by combining the above-mentioned components, a tread rubber composition having high grip performance and excellent control performance at the grip limit and low temperature embrittlement performance can be obtained.
【０００６】本発明に用いるＳＢＲ（Ｉ）は、スチレン
量が４０〜４５重量％、ブタジエン部分のビニル量が５
〜２０重量％、好ましくは１０〜２０重量％である。ス
チレン量が４０重量％未満では高グリップ性が得られ
ず、４５重量％を越えると高グリップ性能が得られる
が、低温脆化性能が著しく悪化する。ブタジエン部分の
ビニル量が５重量％未満ではポリマーの製造が困難とな
り、２０重量％を越えるとグリップ性能が良くなるが、
加硫反応が遅くなる、混練しにくくなる等の製造工程の
問題が生じると共に低温脆化性が悪くなる。The SBR (I) used in the present invention has a styrene content of 40 to 45% by weight and a vinyl content of 5 parts in the butadiene portion.
-20% by weight, preferably 10-20% by weight. If the amount of styrene is less than 40% by weight, high grip performance cannot be obtained, and if it exceeds 45% by weight, high grip performance can be obtained, but the low temperature embrittlement performance remarkably deteriorates. When the vinyl content in the butadiene portion is less than 5% by weight, it becomes difficult to produce a polymer, and when it exceeds 20% by weight, the grip performance is improved.
Problems in the manufacturing process such as slow vulcanization reaction and difficulty in kneading occur, and low temperature embrittlement deteriorates.
【０００７】ＳＢＲ（II）は、スチレン量が５〜２０重
量％、好ましくは１０〜２０重量％、ブタジエン部分の
ビニル量が５〜２０重量％、好ましくは１０〜２０重量
％である。スチレン量が５重量％未満では全体としての
グリップの低下が大きく、２０重量％を越えると、前記
ＳＢＲ（Ｉ）との相溶性が増大して低温脆化性能が悪く
なる。ブタジエン部分のビニル量が５重量％未満ではポ
リマーの製造が困難となり、２０重量％を越えるとポリ
マーのＴgが上がりグリップ性能が向上するが、やはり
低温脆化性能が悪くなる。SBR (II) has a styrene content of 5 to 20% by weight, preferably 10 to 20% by weight, and a vinyl content in the butadiene portion of 5 to 20% by weight, preferably 10 to 20% by weight. If the amount of styrene is less than 5% by weight, the grip as a whole is significantly reduced, and if it exceeds 20% by weight, the compatibility with the SBR (I) increases and the low temperature embrittlement performance deteriorates. If the vinyl content in the butadiene portion is less than 5% by weight, it becomes difficult to produce the polymer, and if it exceeds 20% by weight, the Tg of the polymer increases and the grip performance is improved, but the low temperature embrittlement performance is also deteriorated.
【０００８】該配合物中のＳＢＲ（II）の配合割合は全
ポリマー分の１５〜２５％、好ましくは１５〜２０％で
ある。配合割合が１５％未満ではグリップ性能およびコ
ントロール性能は良好であるが低温脆化性が大きく低下
し、２５％を越えるとグリップ限界高さの低下が大き
い。The blending ratio of SBR (II) in the blend is 15 to 25% of the total polymer, preferably 15 to 20%. When the blending ratio is less than 15%, the grip performance and control performance are good, but the low temperature embrittlement is greatly reduced, and when it exceeds 25%, the grip limit height is greatly reduced.
【０００９】本発明のトレッドゴム組成物は、前記ゴム
成分１００重量部に対して、さらに７５〜１１０重量部
のカーボンブラックおよび３５〜８０重量部のアロマオ
イルを配合したものである。本発明のトレッドゴム組成
物は、前記成分をロール、バンバリー等で混合すること
により製造することができ、また、要すれば、その性能
を損なわない範囲で、さらに他の亜鉛華、ステアリン
酸、老化防止剤、ワックス、加硫促進剤、硫黄等の添加
剤を配合してもよい。得られたゴム組成物を押出機等に
より所定形状にし、タイヤの他の構成ゴム組成物と共に
型内で加硫成形することにより、タイヤが得られる。加
硫条件は公知である。The tread rubber composition of the present invention further comprises 75 to 110 parts by weight of carbon black and 35 to 80 parts by weight of aroma oil per 100 parts by weight of the rubber component. The tread rubber composition of the present invention can be produced by mixing the above components with a roll, Banbury, or the like, and, if necessary, to the extent that the performance is not impaired, other zinc white, stearic acid, You may mix | blend additives, such as an antioxidant, a wax, a vulcanization accelerator, and sulfur. A tire is obtained by shaping the obtained rubber composition into a predetermined shape with an extruder or the like, and vulcanizing the rubber composition together with other constituent rubber compositions of the tire in a mold. Vulcanization conditions are known.
【００１０】つぎに、実施例および比較例を挙げて本発
明をさらに詳しく説明する。 実施例１〜８および比較例１〜１０ 表１および表２の処方に従い、常法により、トレッドゴ
ム組成物を調製し、これを押出、成形してタイヤ（タイ
ヤサイズ：２２５／５０ＺＲ１６）を得た。これらを用
いてつぎの項目について評価した。結果を表１および表
２に示す。Next, the present invention will be described in more detail with reference to Examples and Comparative Examples. Examples 1 to 8 and Comparative Examples 1 to 10 According to the formulations in Table 1 and Table 2, a tread rubber composition was prepared by a conventional method, and this was extruded and molded to obtain a tire (tire size: 225 / 50ZR16). It was The following items were evaluated using these. The results are shown in Tables 1 and 2.
【００１１】（評価方法）試験サンプルの評価はつぎの
方法で行った。 tanδピーク温度：岩本製作所（株）製の粘弾性スペク
トロメーターを用いて、周波数１０Ｈz、初期歪１０
％、振巾±０.２５％、昇温速度２℃／分の条件下で測
定した。 低温脆性試験：ＪＩＳ Ｋ３６０１の低温脆性破壊試験
法に従った。 グリップ性能：ブリティッシュポータブル・スキッドテ
スターによるスキッド値を測定し、実施例１の値を１０
０とした時の値を指数で表した。なお、路面はセイフテ
ィーウォーク（３Ｍ社製）を使用し、湿潤させた場合と
乾燥させた状態の２条件で測定した。(Evaluation Method) The test samples were evaluated by the following methods. tan δ peak temperature: using a viscoelasticity spectrometer manufactured by Iwamoto Seisakusho Co., Ltd., frequency 10 Hz, initial strain 10
%, Swing range ± 0.25%, and temperature rising rate 2 ° C./min. Low temperature brittleness test: The low temperature brittleness fracture test method of JIS K3601 was followed. Grip performance: The skid value by a British portable skid tester was measured, and the value of Example 1 was 10
The value when 0 was represented by an index. The road surface was measured using Safety Walk (manufactured by 3M Co.) under two conditions, a wet condition and a dry condition.
【００１２】グリップ限界時のコントロール性能：評価
車両として国産乗用車（３リットルエンジン）を用い、
評価者３人の平均点を、実施例１の値を１００とした場
合の指数にて表した。 発熱性：タイヤをドラム上で３００ｒｐｍで回転させた
時の、タイヤショルダー部のトレッド表面から５mmだけ
タイヤ内部に入った所の温度を熱電対で測定した。Control performance at grip limit: Using a domestic passenger car (3 liter engine) as an evaluation vehicle,
The average score of the three evaluators was represented by an index when the value of Example 1 was 100. Exothermicity: When the tire was rotated on the drum at 300 rpm, the temperature at the place where it entered the inside of the tire by 5 mm from the tread surface of the tire shoulder was measured with a thermocouple.
【００１３】[0013]
【表１】 [Table 1]
【表２】 [Table 2]
【００１４】[0014]
【発明の効果】以上述べたごとく、本発明によれば、高
いグリップ性能を有すると共に、グリップ限界時のコン
トロール性能および低温脆化性能に優れたトレッドゴム
組成物が得られる。As described above, according to the present invention, it is possible to obtain a tread rubber composition which has a high grip performance and is excellent in the control performance at the grip limit and the low temperature embrittlement performance.
Claims (1)
ン部分のビニル量５〜２０重量％のスチレンブタジエン
ゴム（Ｉ）を８５〜７５重量部、およびスチレン量５〜
２０重量％、ブタジエン部分のビニル量５〜２０重量％
のスチレンブタジエンゴム（II）を１５〜２５重量部、
合計で１００重量部含有し、さらに平均粒径１５〜２２
μｍのカーボンブラックを７５〜１１０重量部およびア
ロマオイルを３５〜８０重量部含有してなるトレッドゴ
ム組成物。1. A styrene-butadiene rubber (I) having a styrene content of 40 to 45% by weight, a vinyl content of a butadiene portion of 5 to 20% by weight, and an styrene content of 5 to 5% by weight.
20% by weight, vinyl content of butadiene portion 5 to 20% by weight
15-25 parts by weight of styrene-butadiene rubber (II)
100 parts by weight in total, with an average particle size of 15-22
A tread rubber composition containing 75 to 110 parts by weight of carbon black having a size of μm and 35 to 80 parts by weight of aroma oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3297115A JP3009767B2 (en) | 1991-11-13 | 1991-11-13 | Tread rubber composition for tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3297115A JP3009767B2 (en) | 1991-11-13 | 1991-11-13 | Tread rubber composition for tire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05132583A true JPH05132583A (en) | 1993-05-28 |
| JP3009767B2 JP3009767B2 (en) | 2000-02-14 |
Family
ID=17842407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3297115A Expired - Fee Related JP3009767B2 (en) | 1991-11-13 | 1991-11-13 | Tread rubber composition for tire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3009767B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7351761B2 (en) | 2005-12-28 | 2008-04-01 | Sumitomo Rubber Industries, Ltd. | Rubber composition and tire using the same |
-
1991
- 1991-11-13 JP JP3297115A patent/JP3009767B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7351761B2 (en) | 2005-12-28 | 2008-04-01 | Sumitomo Rubber Industries, Ltd. | Rubber composition and tire using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3009767B2 (en) | 2000-02-14 |
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