JPS641500B2 - - Google Patents
Info
- Publication number
- JPS641500B2 JPS641500B2 JP10066980A JP10066980A JPS641500B2 JP S641500 B2 JPS641500 B2 JP S641500B2 JP 10066980 A JP10066980 A JP 10066980A JP 10066980 A JP10066980 A JP 10066980A JP S641500 B2 JPS641500 B2 JP S641500B2
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- parts
- weight
- sidewall
- polybutadiene
- 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
Links
- 229920001971 elastomer Polymers 0.000 claims description 41
- 239000005060 rubber Substances 0.000 claims description 41
- 239000000203 mixture Substances 0.000 claims description 16
- 229920002857 polybutadiene Polymers 0.000 claims description 16
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 9
- 229920002554 vinyl polymer Polymers 0.000 claims description 9
- 244000043261 Hevea brasiliensis Species 0.000 claims description 8
- 229920003049 isoprene rubber Polymers 0.000 claims description 8
- 229920003052 natural elastomer Polymers 0.000 claims description 8
- 229920001194 natural rubber Polymers 0.000 claims description 8
- 239000005062 Polybutadiene Substances 0.000 claims description 7
- 238000005096 rolling process Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 5
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 238000009472 formulation Methods 0.000 description 3
- MZRVEZGGRBJDDB-UHFFFAOYSA-N N-Butyllithium Chemical compound [Li]CCCC MZRVEZGGRBJDDB-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- CBCKQZAAMUWICA-UHFFFAOYSA-N 1,4-phenylenediamine Chemical compound NC1=CC=C(N)C=C1 CBCKQZAAMUWICA-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 239000010692 aromatic oil Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229920003193 cis-1,4-polybutadiene polymer Polymers 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- -1 etc.) Polymers 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- DVSDBMFJEQPWNO-UHFFFAOYSA-N methyllithium Chemical compound C[Li] DVSDBMFJEQPWNO-UHFFFAOYSA-N 0.000 description 1
- DEQZTKGFXNUBJL-UHFFFAOYSA-N n-(1,3-benzothiazol-2-ylsulfanyl)cyclohexanamine Chemical compound C1CCCCC1NSC1=NC2=CC=CC=C2S1 DEQZTKGFXNUBJL-UHFFFAOYSA-N 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
- 150000002902 organometallic compounds Chemical class 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000010734 process oil Substances 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- VOITXYVAKOUIBA-UHFFFAOYSA-N triethylaluminium Chemical compound CC[Al](CC)CC VOITXYVAKOUIBA-UHFFFAOYSA-N 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Description
本発明はラジアルタイヤのサイドウオール用ゴ
ム組成物に関する。
自動車の燃料消費量に大きな影響を及ぼす走行
抵抗の中でもタイヤの転動抵抗の占める割合は見
逃すことができないほど大きい。
タイヤの転動抵抗の発生原因のうち主要なもの
はタイヤ構成材料の内部摩擦に起因するもので、
例えばラジアルタイヤの場合、サイドウオールゴ
ムのエネルギー損失による影響が比較的大きいこ
とが知られている。
即ちこれを動的粘弾性特性面からみると、ラジ
アルタイヤのサイドウオール部は損失モジユラス
E″と関係する剪断および曲げ運動を主としてお
こない、この運動によるエネルギー損失がタイヤ
の転動抵抗発生の一原因となるのである。
このため従来からサイドウオール部には損失モ
ジユラスの低いゴム、例えば天然ゴム、イソプレ
ンゴム、ブタジエンゴムまたはこれらの混合ゴム
等が使用されているが、タイヤの転動抵抗を十分
低減させるに至つていないのが実情である。
本発明はこのような観点からのサイドウオール
部の改良に係わるものである。
即ち本発明は、ビニル成分を40％以上有するポ
リブタジエンゴム20〜100重量部および天然ゴム、
イソプレンゴムあるいはこれらの混合ゴム80〜０
重量部を基材ゴムとして含有することを特徴とす
るラジアルタイヤのサイドウオール用ゴム組成物
に関する。
本発明で用いるビニル成分を40％以上有するポ
リブタジエンゴムの調製法は特に限定的ではない
が、通常はリチウム、アルミニウム等を有する有
機金属化合物、例えばメチルリチウム、ｎ―ブチ
ルリチウム、トリエチルアルミニウム等を触媒と
する炭化水素溶媒（例えばベンゼン、シクロヘキ
サン等）中でのブタジエンゴムの溶液重合法を用
いる。
このようにして得られるビニル成分、即ち１，
２―結合を少なくとも40％有するポリブタジエン
ゴムはゴム組成物中に20〜100重量部好ましくは
40〜80重量部含有させる。ポリブタジエンゴムの
配合量が20重量部以下になると転動抵抗を減少さ
せる効果が少なく、好ましくない。転動抵抗の低
減と疲労寿命の向上について好ましい配合量は40
〜80重量部である。
本発明においては基材ゴムとして上記ポリブタ
ジエンゴムの他に、天然ゴム、イソプレンゴムあ
るいはこれらの混合ゴムを80〜０重量部、好まし
くは60〜20重量部配合させる。
天然ゴム、イソプレンゴム、あるいはこれらの
混合ゴムの配合量が80重量部以上になると転動抵
抗の減少に対する効果が小さくなり好ましくな
い。また20重量部以上60重量部以下を配合するこ
とによつて、低転動抵抗性能を損うことなく疲労
寿命の増加が可能である。
本発明に係る基材ゴムには所望によつてさらに
ビニル成分を10％以下有するブタジエンゴムを０
〜40重量部、好ましくは10〜30重量部配合させて
機械的疲労寿命をのばしてもよい。この場合、天
然ゴム、イソプレンゴムあるいはこれらの混合ゴ
ムの配合量は2050重量部にするのが好ましい。こ
のブタジエンゴムの配合量が40重量部以上になる
と転動抵抗低減効果が小さくなるので好ましくな
い。
なお、本発明に係る基材ゴムに含有させてもよ
い第三成分としては、上記のビニル成分を10％以
下有するブタジエンゴム（例えばシス―１，４―
ポリブタジエンゴム、トランス―ポリブタジエン
等）の他に、SBR、ブチルゴム、EPT、EPゴム
等が例示される。
本発明によるゴム組成物には上記の基材ゴムな
らびに加硫剤としての硫黄の他に常套の配合添加
剤、例えばステアリン酸や酸化亜鉛のような加硫
助剤、Ｎ―イソプロピル―Ｎ―フエニル―ｐ―フ
エニレンジアミン等の老化防止剤、Ｎ―シクロヘ
キシル―２ベンゾチアジルスルフエンアミド等の
促進剤、カーボンブラツク等の補強剤、アロマチ
ツクオイル等のプロセスオイル、および、ワツク
ス等のオゾン劣化防止剤等を適宜配合する。
以上のようにして得られるゴム組成物を加硫硬
化することによつてラジアルタイヤのサイドウオ
ールに適したゴムが調製される。このゴムはラジ
アルタイヤのうちでも、特にスチール、グラスフ
アイバー、芳香族ポリアミド、レーヨンおよびポ
リエステルのいずれか１種以上で構成されたブレ
ーカーを備えたラジアルタイヤ、就中乗用車用ラ
ジアルタイヤのサイドウオールに好適なものであ
る。
本発明に係わる上記のゴムはサイドウオールゴ
ムとしてラジアルタイヤに用いるとその転動抵抗
を従来にくらべて大幅に低減させる効果がある。
以下、本発明を実施例によつて説明する。
実施例および比較例
表―１の配合処方によつて常法により６種類の
ゴム組成物を調製した。
The present invention relates to a rubber composition for sidewalls of radial tires. Among the running resistances that have a large effect on the fuel consumption of automobiles, tire rolling resistance accounts for a large proportion that cannot be overlooked. The main cause of tire rolling resistance is due to internal friction of the tire constituent materials.
For example, in the case of radial tires, it is known that the influence of energy loss in sidewall rubber is relatively large. In other words, if we look at this from the perspective of dynamic viscoelastic properties, the sidewall part of a radial tire has a loss modulus.
The energy loss caused by this movement is one of the causes of tire rolling resistance.For this reason, the sidewall has traditionally been filled with rubber with a low loss modulus, such as natural rubber. Rubber, isoprene rubber, butadiene rubber, or a mixture of these rubbers are used, but the reality is that they have not been able to sufficiently reduce the rolling resistance of tires. The present invention relates to the improvement of the wall portion.That is, the present invention relates to the improvement of the wall portion.That is, the present invention is directed to a polybutadiene rubber containing 20 to 100 parts by weight of polybutadiene rubber having a vinyl content of 40% or more, natural rubber,
Isoprene rubber or mixed rubber 80~0
The present invention relates to a rubber composition for a sidewall of a radial tire, which contains part by weight as a base rubber. The method for preparing the polybutadiene rubber having a vinyl content of 40% or more used in the present invention is not particularly limited, but usually an organometallic compound containing lithium, aluminum, etc., such as methyllithium, n-butyllithium, triethylaluminum, etc., is used as a catalyst. A solution polymerization method of butadiene rubber in a hydrocarbon solvent (eg, benzene, cyclohexane, etc.) is used. The vinyl component thus obtained, namely 1,
The polybutadiene rubber having at least 40% of 2-bonds is preferably present in the rubber composition in an amount of 20 to 100 parts by weight.
Contain 40 to 80 parts by weight. If the amount of polybutadiene rubber is less than 20 parts by weight, the effect of reducing rolling resistance will be small, which is not preferable. The preferred blending amount for reducing rolling resistance and improving fatigue life is 40.
~80 parts by weight. In the present invention, in addition to the polybutadiene rubber described above, 80 to 0 parts by weight, preferably 60 to 20 parts by weight of natural rubber, isoprene rubber, or a mixed rubber thereof is blended as the base rubber. If the amount of natural rubber, isoprene rubber, or a mixed rubber thereof exceeds 80 parts by weight, the effect on reducing rolling resistance will be undesirably reduced. Furthermore, by blending 20 parts by weight or more and 60 parts by weight or less, fatigue life can be increased without impairing low rolling resistance performance. If desired, the base rubber according to the present invention may further contain 0 butadiene rubber having a vinyl content of 10% or less.
~40 parts by weight, preferably 10 to 30 parts by weight may be incorporated to extend mechanical fatigue life. In this case, the amount of natural rubber, isoprene rubber, or a mixed rubber thereof is preferably 2050 parts by weight. If the amount of butadiene rubber blended exceeds 40 parts by weight, the effect of reducing rolling resistance will be reduced, which is not preferable. The third component that may be included in the base rubber according to the present invention is butadiene rubber having 10% or less of the vinyl component (for example, cis-1,4-
(polybutadiene rubber, trans-polybutadiene, etc.), SBR, butyl rubber, EPT, EP rubber, etc. are exemplified. In addition to the above-mentioned base rubber and sulfur as a vulcanizing agent, the rubber composition according to the invention contains customary formulation additives, such as vulcanizing aids such as stearic acid and zinc oxide, N-isopropyl-N-phenyl -Antioxidants such as p-phenylenediamine, accelerators such as N-cyclohexyl-2benzothiazylsulfenamide, reinforcing agents such as carbon black, process oils such as aromatic oil, and ozone deterioration of wax etc. Add inhibitors and the like as appropriate. By vulcanizing and curing the rubber composition obtained as described above, a rubber suitable for the sidewall of a radial tire is prepared. This rubber is particularly suitable for the sidewalls of radial tires equipped with breakers made of one or more of steel, fiberglass, aromatic polyamide, rayon, and polyester, especially radial tires for passenger cars. It is something. When the above-mentioned rubber according to the present invention is used as a sidewall rubber in a radial tire, it has the effect of significantly reducing the rolling resistance of the tire compared to the conventional rubber. Hereinafter, the present invention will be explained with reference to Examples. Examples and Comparative Examples Six types of rubber compositions were prepared according to the formulations shown in Table 1 in a conventional manner.
【表】【table】
【表】
ゴム組成物１〜６を加硫して（加硫条件：175
℃，20分）それぞれ加硫ゴム1′〜6′を得た。加硫
ゴム1′〜6′について粘弾性特性、疲労特性を測定
し、結果を表―２に示す。[Table] Rubber compositions 1 to 6 were vulcanized (vulcanization conditions: 175
℃, 20 minutes) Vulcanized rubbers 1' to 6' were obtained, respectively. The viscoelastic properties and fatigue properties of vulcanized rubbers 1' to 6' were measured, and the results are shown in Table 2.
【表】
前記表―１の各配合のゴム組成物をサイドウオ
ールに用いて165SR13サイズのタイヤを試作し、
転動抵抗，耐久寿命及びカツト成長速度を評価
し、その結果を表―３に示す。表から本発明の実
施例は比較例よりも各性能がいずれも優れている
ことが認められる。[Table] A 165SR13 size tire was prototyped using the rubber composition of each formulation in Table 1 for the sidewall.
The rolling resistance, durability life and cut growth rate were evaluated and the results are shown in Table 3. From the table, it can be seen that the examples of the present invention are superior to the comparative examples in each performance.
Claims (1)
％以上有するポリブタジエンゴム20〜100重量部
および天然ゴム、イソプレンゴムあるいはこれら
の混合ゴム80〜０重量部を基材ゴムとして含有す
ることを特徴とするラジアルタイヤのサイドウオ
ール用ゴム組成物。 ２ 全ゴム成分100重量部のうちビニル成分を40
％以上有するポリブタジエンゴム40〜80重量部、
天然ゴム、イソプレンゴムあるいはこれらの混合
ゴム60〜20重量部を基材ゴムとして含有すること
を特徴とする第１項記載のラジアルタイヤのサイ
ドウオール用ゴム組成物。 ３ 全ゴム成分100重量部のうちビニル成分を40
％以上有するポリブタジエンゴム20〜80重量部、
天然ゴム、イソプレンゴムあるいはこれらの混合
ゴム20〜50重量部およびビニル成分を10％以下有
するブタジエンゴム０〜40重量部を基材ゴムとし
て含有することを特徴とするラジアルタイヤのサ
イドウオール用ゴム組成物。[Claims] 1. 40 parts by weight of vinyl component out of 100 parts by weight of total rubber component.
1. A rubber composition for a sidewall of a radial tire, comprising 20 to 100 parts by weight of polybutadiene rubber and 80 to 0 parts by weight of natural rubber, isoprene rubber, or a mixture thereof as base rubber. 2. 40 parts of vinyl component out of 100 parts by weight of total rubber component.
% or more of polybutadiene rubber 40-80 parts by weight,
2. The rubber composition for a sidewall of a radial tire according to claim 1, which contains 60 to 20 parts by weight of natural rubber, isoprene rubber, or a mixed rubber thereof as a base rubber. 3. 40 parts by weight of vinyl component out of 100 parts by weight of total rubber component.
20 to 80 parts by weight of polybutadiene rubber having % or more,
A rubber composition for a sidewall of a radial tire, characterized in that it contains 20 to 50 parts by weight of natural rubber, isoprene rubber, or a mixed rubber thereof and 0 to 40 parts by weight of butadiene rubber having a vinyl component of 10% or less as base rubber. thing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10066980A JPS5725339A (en) | 1980-07-22 | 1980-07-22 | Rubber composition for side wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10066980A JPS5725339A (en) | 1980-07-22 | 1980-07-22 | Rubber composition for side wall |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5725339A JPS5725339A (en) | 1982-02-10 |
| JPS641500B2 true JPS641500B2 (en) | 1989-01-11 |
Family
ID=14280175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10066980A Granted JPS5725339A (en) | 1980-07-22 | 1980-07-22 | Rubber composition for side wall |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5725339A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5734141A (en) * | 1980-08-07 | 1982-02-24 | Sumitomo Rubber Ind Ltd | Rubber composition for external layer of side wall |
| JPS5734140A (en) * | 1980-08-07 | 1982-02-24 | Sumitomo Rubber Ind Ltd | Rubber composition for internal layer of side wall |
| JPH0689183B2 (en) * | 1985-02-18 | 1994-11-09 | 株式会社ブリヂストン | Rubber composition for sidewall |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5937014B2 (en) * | 1978-07-11 | 1984-09-07 | 日本ゼオン株式会社 | Rubber composition for tires and treads |
-
1980
- 1980-07-22 JP JP10066980A patent/JPS5725339A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5725339A (en) | 1982-02-10 |
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