JPH064723B2 - Tires for passenger cars - Google Patents
Tires for passenger carsInfo
- Publication number
- JPH064723B2 JPH064723B2 JP63040312A JP4031288A JPH064723B2 JP H064723 B2 JPH064723 B2 JP H064723B2 JP 63040312 A JP63040312 A JP 63040312A JP 4031288 A JP4031288 A JP 4031288A JP H064723 B2 JPH064723 B2 JP H064723B2
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- tan
- styrene
- tire
- tires
- 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 - Lifetime
Links
- 229920001971 elastomer Polymers 0.000 claims description 25
- 239000005060 rubber Substances 0.000 claims description 25
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 14
- 229920003049 isoprene rubber Polymers 0.000 claims description 11
- ROGIWVXWXZRRMZ-UHFFFAOYSA-N 2-methylbuta-1,3-diene;styrene Chemical compound CC(=C)C=C.C=CC1=CC=CC=C1 ROGIWVXWXZRRMZ-UHFFFAOYSA-N 0.000 claims description 7
- 244000043261 Hevea brasiliensis Species 0.000 claims description 5
- 229920003052 natural elastomer Polymers 0.000 claims description 5
- 229920001194 natural rubber Polymers 0.000 claims description 5
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 5
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims description 3
- 229910052740 iodine Inorganic materials 0.000 claims description 3
- 239000011630 iodine Substances 0.000 claims description 3
- 238000001179 sorption measurement Methods 0.000 claims description 3
- 239000006185 dispersion Substances 0.000 description 7
- 239000006229 carbon black Substances 0.000 description 4
- 238000004073 vulcanization Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000004898 kneading Methods 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 group [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- DECIPOUIJURFOJ-UHFFFAOYSA-N ethoxyquin Chemical compound N1C(C)(C)C=C(C)C2=CC(OCC)=CC=C21 DECIPOUIJURFOJ-UHFFFAOYSA-N 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000693 micelle Substances 0.000 description 1
- 238000002156 mixing 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
- 150000001451 organic peroxides Chemical class 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 239000010734 process oil Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 230000003068 static effect Effects 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
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Tires In General (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は操縦安定性に優れた乗用車用タイヤに関する。TECHNICAL FIELD The present invention relates to a passenger car tire having excellent steering stability.
（従来の技術） 最近、自動車の性能の大幅な向上や道路の発達に伴い高
運動性能を備えた、空気入りタイヤに対する要求が強な
ってきた。高運動性タイヤの要求特性の中で加速性能や
ブレーキ性能に代表されるグリップ性能(トレッドゴム
と路面の摩擦係数)は、特に重要な要求特性である。(Prior Art) Recently, there has been an increasing demand for pneumatic tires having high kinetic performance with the drastic improvement of automobile performance and the development of roads. Gripping performance represented by acceleration performance and braking performance (coefficient of friction between tread rubber and road surface) is a particularly important required property among the required properties of a high-movement tire.
トレッドゴムと路面との摩擦係数は、トレッドゴムの損
失係数（ｔａｎδ）と相関があり、tanδが高い程，摩
擦係数が高いことは既に公知である。ところがtanδは
温度、周波数(＝速度)に依存しており、従ってタイヤの
グリップ性能は気温、速度により異なる。The coefficient of friction between the tread rubber and the road surface has a correlation with the loss coefficient (tan δ) of the tread rubber, and it is already known that the higher the tan δ, the higher the coefficient of friction. However, tan δ depends on temperature and frequency (= speed), so the grip performance of the tire varies depending on temperature and speed.
（発明が解決しようとする課題） 本発明の目的はｔａｎδの温度及び速度依存性が小さ
く、優れた操縦安定性を発揮するトレッドを有する乗用
車用タイヤを提供することにある。(Problems to be Solved by the Invention) An object of the present invention is to provide a passenger car tire having a tread that exhibits small tan δ temperature and speed dependence and exhibits excellent steering stability.
（課題を解決するための手段） 本発明はゴム成分がスチレン含有率が５〜40％のスチレ
ンイソプレンゴムと、スチレンブタジエンゴム、天然ゴ
ム若しくはイソプレンゴムが重量比で５／95〜60／40の
割合からなり、且つ沃素吸着量(ＩＡ)が100mg／g以上の
カーボンブラックを配合したゴム組成物より得られるト
レッドを使用したことを特徴とする乗用車用タイヤに係
る。(Means for Solving the Problems) In the present invention, the rubber component is a styrene isoprene rubber having a styrene content of 5 to 40% and a styrene butadiene rubber, natural rubber or isoprene rubber in a weight ratio of 5/95 to 60/40. A tire for a passenger car, characterized in that a tread obtained from a rubber composition containing a carbon black having a proportion of iodine adsorption (IA) of 100 mg / g or more is used.
本発明のタイヤのトレッドのゴム成分はスチレン含有率
が５〜40％のスチレンイソプレンゴム(Ａ成分という)
と、スチレンブタジエンゴム、天然ゴム若しくはイソプ
レンゴム(Ｂ成分という)からなる。本発明において上記
スチレンイソプレンゴム中のスチレン含有率は、日立製
作所製、260−30型・赤外分光光度計にて測定した。The rubber component of the tread of the tire of the present invention has a styrene content of 5 to 40% styrene isoprene rubber (referred to as component A).
And styrene-butadiene rubber, natural rubber or isoprene rubber (called component B). In the present invention, the styrene content in the styrene isoprene rubber was measured with a Hitachi Model 260-30 infrared spectrophotometer.
スチレンイソプレンゴム中のスチレン含有率が５％未満
の場合はスチレンブタジエンゴム、天然ゴム若しくはイ
ソプレンゴムとブレンドしたゴム組成物はｔａｎδの温
度分散曲線の形状に於いて２つのピークが存在せず、高
性能タイヤに要求される操縦安定性が向上しない。スチ
レンイソプレンゴム中のスチレン含有率が40％を越える
とゴムの加工性が悪化し、実用上不適当である。When the styrene content in styrene isoprene rubber is less than 5%, the rubber composition blended with styrene-butadiene rubber, natural rubber or isoprene rubber does not have two peaks in the shape of the temperature dispersion curve of tan δ, The steering stability required for performance tires is not improved. If the styrene content in the styrene isoprene rubber exceeds 40%, the processability of the rubber deteriorates, which is not suitable for practical use.
Ａ成分とＢ成分の配合割合は広い範囲から選択できるが
通常は前者／後者が重量比で約５／95〜60／40、好まし
くは約10／90〜40／60の範囲が好適である。上記の範囲
外ではゴム組成物はｔａｎδの温度分散曲線の形状に於
いて２つのピークが存在せず、高性能タイヤに要求され
る操縦安定性が向上しない。The blending ratio of the A component and the B component can be selected from a wide range, but the former / the latter is usually in a weight ratio of about 5/95 to 60/40, preferably about 10/90 to 40/60. Outside the above range, the rubber composition does not have two peaks in the shape of the temperature dispersion curve of tan δ, and the steering stability required for a high performance tire is not improved.
本発明のゴム組成物はｔａｎδの温度分散曲線の形状に
於いて２つのピークが存在し、特に高性能タイヤに要求
される操縦安定性(Ｄry路面操縦安定性、Ｗet路面操縦
安定性)が極めて優れている。尚、損失正接ｔａｎδの
測定は岩本製作所製、粘弾性スペクトロメータを使用
し、100Hz、静歪15％、動歪0.3％の単純引張にて行っ
た。サンプル形状は0.5mm厚、５mm巾、２cm長である。The rubber composition of the present invention has two peaks in the shape of the temperature dispersion curve of tan δ, and particularly the steering stability (Dry road surface steering stability, Wet road surface steering stability) required for high-performance tires is extremely high. Are better. The loss tangent tan δ was measured by using a viscoelasticity spectrometer manufactured by Iwamoto Seisakusho at 100 Hz, simple strain of 15% static strain and 0.3% dynamic strain. The sample shape is 0.5 mm thick, 5 mm wide and 2 cm long.
尚、本発明においてツーピークtanδが存在する態様と
しては第１図に示すようにｔａｎδ温度分散曲線におい
て２つのピークがはっきり存在する場合は勿論である
が、必ずしも明確にツーピークを示す必要はなく、第２
〜３図に示されるような曲線が一様でない場合、分布が
ブロードな場合も包含される。第４図はツーピークを示
さない一般タイプのｔａｎδ温度分散曲線を示す。In addition, as a mode in which the two-peak tan δ exists in the present invention, it goes without saying that two peaks clearly exist in the tan δ temperature dispersion curve as shown in FIG. Two
When the curve shown in FIG. 3 is not uniform, the case where the distribution is broad is included. FIG. 4 shows a general type tan δ temperature dispersion curve that does not show two peaks.
本発明の組成物に老いてはブレンド物のミクロ分散状態
として、基本的には非相溶系であるゴム同士の一方が適
度なゾーンサイズで分散し、且つその表面のごく薄皮部
が他ゴムと相溶状態にある、いわゆる石鹸のミセル構造
的形状を形成することにより各構成ゴムともその特徴が
十分に発揮でのるものと考えられる。In the composition of the present invention, as a micro-dispersed state of the blend, one of the rubbers which is basically an incompatible system is dispersed in a proper zone size, and the very thin skin portion of the surface thereof is different from other rubbers. It is considered that the characteristics of each of the constituent rubbers can be sufficiently exerted by forming a so-called soap micelle structural shape in a compatible state.
次に本発明のゴム組成物においては沃素吸着量(ＩＡ)が
100mg／g以上のカーボンブラックを通常ゴム成分100部
(重量部、以下同様)に対して約50〜200部配合する。上
記ＩＡはＪＩＳ Ｋ6221に準拠して測定され、100mg／g
未満の場合は操縦安定性の向上が少なく、又250mg／gを
越える場合は混練作業性が困難となり実用的でない。Next, in the rubber composition of the present invention, the iodine adsorption amount (IA) is
100 mg / g or more of carbon black is usually 100 parts of rubber component
Approximately 50 to 200 parts by weight are added to (parts by weight, the same applies hereinafter). The above IA is 100 mg / g as measured according to JIS K6221.
When it is less than 250 mg / g, the handling stability is not improved, and when it exceeds 250 mg / g, the kneading workability becomes difficult, which is not practical.
本発明のタイヤは上記成分を通常の加工装置、例えばロ
ール、バンバリーミキサー、ニーダーなどにより混練す
ることにより得られるゴム組成物をトレッド部に使用し
て常法により製造することができる。また上記成分の他
に公知の加硫剤、加硫促進剤、加硫促進助剤、加硫遅延
剤、有機過酸化物、補強剤、充填剤、可塑剤、老化防止
剤、粘着付与剤、着色剤等を添加できることは勿論であ
る。The tire of the present invention can be produced by a conventional method using a rubber composition obtained by kneading the above components with a usual processing device such as a roll, a Banbury mixer, a kneader or the like for the tread portion. In addition to the above components, known vulcanizing agents, vulcanization accelerators, vulcanization accelerating aids, vulcanization retardants, organic peroxides, reinforcing agents, fillers, plasticizers, antioxidants, tackifiers, Of course, a colorant or the like can be added.
（発明の効果） 本発明のタイヤのトレッドゴム組成物のｔａｎδがツー
ピークを持つことにより、各構成ゴムともその特徴が十
分に発揮され、実際の高性能タイヤの高速走行条件に於
いて極めて優れた操縦安定性が得られる。即ち、実走行
に於ける速度変化(時間−温度換算測により温度変化に
相当)に対して一定した摩擦係数（ｔａｎδに相当）を
もったブレンドゴム組成物であることが実際の操縦安定
性向上に大きく寄与した要因と考えられる。(Effect of the Invention) Since the tread rubber composition of the tire of the present invention has a two-peak tan δ, the characteristics of each constituent rubber are sufficiently exhibited, and it is extremely excellent under the high-speed running conditions of actual high-performance tires. Steering stability is obtained. That is, a blended rubber composition having a constant friction coefficient (corresponding to tan δ) with respect to speed change (corresponding to temperature change by time-temperature conversion measurement) in actual traveling is improved in actual steering stability. It is considered that this is a factor that greatly contributed to
（実施例） 以下に実施例及び比較例を挙げて説明する。尚、単に部
とある重量部を示す。(Example) Below, an example and a comparative example are given and demonstrated. In addition, only a part and a certain weight part are shown.
尚、タイヤ性能に関しては、各種ゴム組成物をタイヤサ
イズ185／70ＳＲ14のタイヤのトレッド部に使用して、
乾燥路面における路面把握力(dry路面操安性)を実車試
験により評価した。Regarding the tire performance, various rubber compositions were used for the tire tread portion of tire size 185 / 70SR14,
The road gripping force on a dry road surface (dry road maneuverability) was evaluated by an actual vehicle test.
dry路面操安性：サーキット走行性と高速及び低速スラ
ローム安定性により評価した。サーキット走行性は周回
り走行３回の平均タイムをとり、配合Ｎo.８を100とし
て指数表示した。数値の大きい方が良好である。Dry road maneuverability: Evaluated based on circuit runnability and high and low speed slalom stability. Circuit runnability was shown as an index, with the compound No. 8 set to 100, taking the average time of three round trips. The larger the number, the better.
高速スラローム安定性はタイヤを標準内圧、荷重条件
下、速度100km／hでバイロン間隔を35mに設定した区間
でのスラローム走行により配合Ｎo.８を５点としてフイ
ーリング評価した。点の高い程良好である。低速スラロ
ーム安定性は同様条件下、速度40km／hでパイロン間隔
を15mに設定した区間でのスラローム走行により配合Ｎ
o.８を５点としてフイーリング評価した。点の高い程良
好である。The high-speed slalom stability was evaluated by compounding No. 8 as 5 points by running the slalom at a speed of 100 km / h and a byron interval of 35 m under standard internal pressure and load conditions. The higher the point, the better. Low-speed slalom stability is compounded under the same conditions by slalom running in a section with a speed of 40km / h and a pylon interval of 15m.
Feeling was evaluated with o.8 as 5 points. The higher the point, the better.
実施例及び比較例 第１表に記載のブレンドゴム100部、カーボンブラック9
0部、アロマチック系プロセスオイル45部、亜鉛華３
部、ステアリン酸２部、老化防止剤(サントフレックス1
3)１部、パラフィンワックス１部、加硫促進剤(ＣＢＳ)
1.4部及び硫黄２部を、バンバリーミキサーにより４分
間充分に混練しゴム組成物を得、これをトレッドとする
タイヤを常法により得た。Examples and Comparative Examples 100 parts of blended rubber shown in Table 1, carbon black 9
0 parts, 45 parts aromatic process oil, 3 zinc white
Parts, stearic acid 2 parts, anti-aging agent (Santoflex 1
3) 1 part, paraffin wax 1 part, vulcanization accelerator (CBS)
1.4 parts and 2 parts of sulfur were sufficiently kneaded for 4 minutes with a Banbury mixer to obtain a rubber composition, and a tire using this as a tread was obtained by a conventional method.
得られたゴム組成物を160℃で20分間、モールド加硫
し、その特性を測定した。結果を第１表に示す。尚、配
合No.１〜７は実施例であり、他は比較例である。The obtained rubber composition was mold-vulcanized at 160 ° C. for 20 minutes, and its characteristics were measured. The results are shown in Table 1. In addition, compound Nos. 1 to 7 are examples, and others are comparative examples.
尚、表においてＳＩＲはスチレンイソプレンゴム、ＳＢ
Ｒはスチレンブタジエンゴム、ＮＲは天然ゴムを示す。
ＳＩＲのスチレン含有率０％のものは合成ポリイソプレ
ンゴムを示す。カーボンブラックＮ110、Ｎ220、Ｎ330
のＩＡはそれぞれ142、117、87mg／gである。In the table, SIR is styrene isoprene rubber, SB
R represents styrene-butadiene rubber and NR represents natural rubber.
SIR having a styrene content of 0% indicates a synthetic polyisoprene rubber. Carbon black N110, N220, N330
IA is 142, 117 and 87 mg / g, respectively.
第１〜３図は本発明のｔａｎδ温度分散曲線においてピ
ークが２つ存在する各種の態様を示すグラフである。第
４図はツーピークを示さない一般タイプのｔａｎδ温度
分散曲線を示す。1 to 3 are graphs showing various modes in which two peaks are present in the tan δ temperature dispersion curve of the present invention. FIG. 4 shows a general type tan δ temperature dispersion curve that does not show two peaks.
Claims (1)
チレンイソプレンゴムと、スチレンブタジエンゴム、天
然ゴム若しくはイソプレンゴムが重量比で５／95〜60／
40の割合からなり、且つ沃素吸着量(ＩＡ)が100mg／g以
上のカーボンブラックを配合したゴム組成物より得られ
るトレッドを使用したことを特徴とする乗用車用タイ
ヤ。1. A styrene isoprene rubber having a styrene content of 5 to 40% and a styrene butadiene rubber, natural rubber or isoprene rubber in a weight ratio of 5/95 to 60 /.
A tire for a passenger car, characterized by using a tread obtained from a rubber composition having a ratio of 40 and having an iodine adsorption amount (IA) of 100 mg / g or more.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63040312A JPH064723B2 (en) | 1988-02-23 | 1988-02-23 | Tires for passenger cars |
| US07/260,109 US4946887A (en) | 1987-10-21 | 1988-10-20 | Tire tread rubber composition and tire for passenger car |
| DE3835792A DE3835792A1 (en) | 1987-10-21 | 1988-10-20 | RUBBER COMPOSITION FOR TIRE PATCH AND TIRES FOR CARS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63040312A JPH064723B2 (en) | 1988-02-23 | 1988-02-23 | Tires for passenger cars |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01215837A JPH01215837A (en) | 1989-08-29 |
| JPH064723B2 true JPH064723B2 (en) | 1994-01-19 |
Family
ID=12577099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63040312A Expired - Lifetime JPH064723B2 (en) | 1987-10-21 | 1988-02-23 | Tires for passenger cars |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH064723B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3996008B2 (en) | 2002-07-31 | 2007-10-24 | 株式会社ブリヂストン | Rubber composition and pneumatic tire using the same for tread |
| JP4970766B2 (en) * | 2005-10-21 | 2012-07-11 | 住友ゴム工業株式会社 | Rubber composition for breaker cushion and tire using the same |
-
1988
- 1988-02-23 JP JP63040312A patent/JPH064723B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01215837A (en) | 1989-08-29 |
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