JP2000038479A - Rubber composition - Google Patents

Rubber composition

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Publication number
JP2000038479A
JP2000038479A JP10207535A JP20753598A JP2000038479A JP 2000038479 A JP2000038479 A JP 2000038479A JP 10207535 A JP10207535 A JP 10207535A JP 20753598 A JP20753598 A JP 20753598A JP 2000038479 A JP2000038479 A JP 2000038479A
Authority
JP
Japan
Prior art keywords
rubber
tire
deterioration
rubber composition
component
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.)
Pending
Application number
JP10207535A
Other languages
Japanese (ja)
Inventor
Takeshi Shintani
武史 新谷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bridgestone Corp
Original Assignee
Bridgestone Corp
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 Bridgestone Corp filed Critical Bridgestone Corp
Priority to JP10207535A priority Critical patent/JP2000038479A/en
Publication of JP2000038479A publication Critical patent/JP2000038479A/en
Pending legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To provide a rubber composition capable of exhibiting a good deterioration-preventing performance even in a tire at an end period of its running by a synergistic effect of compounding a natural rubber and/or a diene- based synthetic rubber with a specific age resister in a specific ratio. SOLUTION: This rubber composition contains (A) a natural rubber and/or a diene-based synthetic rubber, and (B) a blended material of N-(1,3- dimethylbutyl)-N'-phenyl-p-phenylenediamine (hereinafter as 6C) with a 2,2,4- trimethyl-1,2-dihydroquinoline polymer (hereinafter as RD) in (20:1)-(1:1) weight ratio. Further, the content of the component (B) is preferably 1-5 pt.wt. based on 100 pts.wt. component (A). In this way, if the using ratio of 6C to RD in the component B is within the above range, a synergistic effect is exhibited to suppress the deterioration of the rubber in a tire in an end period of its running effectively and also it becomes possible to improve the adhesion of a tire cord to the rubber.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明はゴム組成物に関し、
さらに詳しくは、優れた劣化防止性能を有するととも
に、タイヤコードとの接着性も良好であり、特にタイヤ
用材料として好適なゴム組成物に関するものである。
TECHNICAL FIELD The present invention relates to a rubber composition,
More specifically, the present invention relates to a rubber composition having excellent deterioration prevention performance and good adhesion to a tire cord, and particularly suitable as a tire material.

【0002】[0002]

【従来の技術】近年、高速道路網の整備、道路舗装率の
増加、タイヤ開発の進展などによって、タイヤの寿命は
飛躍的に延びてきており、それに伴いタイヤの耐久性の
向上が求められている。タイヤの耐久性を向上させるた
めには、様々な手法が用いられているが、ゴムの劣化を
抑制することも、タイヤの耐久性を向上させるための重
要な手法の一つである。ゴムの劣化には、様々な要因が
関与しており、例えば酸化,熱劣化,屈曲亀裂,日光亀
裂,オゾン劣化,銅・マンガン害などによって、劣化が
進行する。したがって、老化防止剤の選定に当たって
は、上記劣化防止作用の種類を考慮するとともに、加硫
速度に及ぼす影響,未加硫ゴム及び加硫ゴムの物性に与
える影響,着色性,汚染性,ブルーム性,毒性,併用効
果などを考慮することが必要である。
2. Description of the Related Art In recent years, the life of tires has been dramatically increased due to the development of a highway network, an increase in road pavement ratio, and progress in tire development. I have. Various techniques have been used to improve the durability of the tire, but suppressing deterioration of the rubber is one of the important techniques for improving the durability of the tire. Various factors are involved in the deterioration of rubber. For example, the deterioration progresses due to oxidation, thermal deterioration, bending cracks, sunlight cracks, ozone deterioration, copper / manganese damage, and the like. Therefore, when selecting an anti-aging agent, consider the type of the above-mentioned deterioration preventing action and consider the effect on the vulcanization rate, the effect on the physical properties of unvulcanized rubber and vulcanized rubber, coloring, contamination, and blooming properties. It is necessary to consider toxicity, toxicity, and combined effects.

【0003】老化防止剤としては、主としてアミン系が
用いられており、このアミン系老化防止剤は、例えばナ
フチルアミン系,ジフェニルアミン系,p−フェニレン
ジアミン系,キノリン系,その他アミン系に分類するこ
とができる。ナフチルアミン系の代表的なものとして
は、フェニル−α−ナフチルアミンなどが知られてお
り、ジフェニルアミン系の代表的なものとしては、ジフ
ェニルアミンとアセトンとの反応生成物、ジフェニルア
ミンとアニリンとアセトンとの反応生成物,オクチル化
ジフェニルアミンなどが知られている。また、p−フェ
ニレンジアミン系の代表的なものとしては、N−イソプ
ロピル−N’−フェニル−p−フェニレンジアミン(3
C),N−(1,3−ジメチルブチル)−N’−フェニ
ル−p−フェニレンジアミン(6C)などがあり、キノ
リン系の代表的なものとしては、2,2,4−トリメチ
ル−1,2−ジヒドロキノリン重合物(RD),6−エ
トキシ−2,2,4−トリメチル−1,2−ジヒドロキ
ノリン(AW)などがある。一般にタイヤゴムの劣化防
止には、酸化,銅害,屈曲亀裂などの防止とともに、熱
劣化防止などがあるが、上述したような従来の老化防止
剤では、これらの様々な原因によるタイヤゴムの劣化を
十分に防止できないのが現状である。特に、ゴム中の酸
素濃度及び水分率が上昇する走行末期におけるタイヤの
ゴムに対する劣化防止が、不十分であって、その解決が
望まれている。
As anti-aging agents, amine-based anti-aging agents are mainly used. These amine-based anti-aging agents can be classified into, for example, naphthylamine, diphenylamine, p-phenylenediamine, quinoline and other amines. it can. Typical examples of naphthylamines include phenyl-α-naphthylamine, and typical examples of diphenylamines include reaction products of diphenylamine and acetone and reaction products of diphenylamine and aniline and acetone. Products, octylated diphenylamine and the like are known. Typical examples of the p-phenylenediamine type include N-isopropyl-N′-phenyl-p-phenylenediamine (3
C), N- (1,3-dimethylbutyl) -N′-phenyl-p-phenylenediamine (6C) and the like, and typical quinoline-based compounds include 2,2,4-trimethyl-1, 2-dihydroquinoline polymer (RD), 6-ethoxy-2,2,4-trimethyl-1,2-dihydroquinoline (AW) and the like. In general, the prevention of tire rubber deterioration includes prevention of oxidation, copper damage, bending cracks, and the like, as well as heat deterioration prevention. However, the above-mentioned conventional anti-aging agents can sufficiently prevent tire rubber deterioration due to these various causes. At present, it cannot be prevented. In particular, the prevention of deterioration of the tire rubber at the end of traveling when the oxygen concentration and the water content in the rubber increase is insufficient, and a solution to the problem is desired.

【0004】[0004]

【発明が解決しようとする課題】本発明は、このような
状況下で、劣化防止性能に優れ、タイヤの材料として用
いた場合、特に走行末期のタイヤにおいても、良好な劣
化防止性能を発揮するゴム組成物を提供することを目的
とするものである。
Under such circumstances, the present invention is excellent in deterioration prevention performance, and exhibits good deterioration prevention performance when used as a material for a tire, especially in a tire at the end of running. It is intended to provide a rubber composition.

【0005】[0005]

【課題を解決するための手段】本発明者らは、前記の好
ましい性質を有するゴム組成物を開発すべく鋭意研究を
重ねた結果、老化防止剤の6CとRDとを特定の割合で
含有するゴム組成物が、その相乗効果により、走行末期
のタイヤにおいても良好な劣化防止性能を発揮するとと
もに、タイヤコードとの接着性をも向上させることを見
出した。本発明は、かかる知見に基づいて完成したもの
である。すなわち、本発明は、(A)天然ゴム及び/又
はジエン系合成ゴムと、(B)N−(1,3−ジメチル
ブチル)−N’−フェニル−p−フェニレンジアミンと
2,2,4−トリメチル−1,2−ジヒドロキノリン重
合物とを重量比20:1ないし1:1の割合で組み合わ
せたものを含有することを特徴とするゴム組成物を提供
するものである。
Means for Solving the Problems The inventors of the present invention have conducted intensive studies to develop a rubber composition having the above-mentioned preferable properties, and as a result, they have specified ratios of 6C and RD as anti-aging agents. It has been found that the rubber composition exerts a good deterioration preventing performance even in a tire at the end of running due to its synergistic effect, and also improves the adhesion to a tire cord. The present invention has been completed based on such findings. That is, the present invention provides (A) a natural rubber and / or a diene-based synthetic rubber, (B) N- (1,3-dimethylbutyl) -N′-phenyl-p-phenylenediamine, and 2,2,4- An object of the present invention is to provide a rubber composition containing a combination of a trimethyl-1,2-dihydroquinoline polymer in a weight ratio of 20: 1 to 1: 1.

【0006】[0006]

【発明の実施の形態】本発明のゴム組成物においては、
(A)成分として、天然ゴム及び/又はジエン系合成ゴ
ムが用いられる。ここで、ジエン系合成ゴムとしては、
例えばポリイソプレン合成ゴム(IR),ポリブタジエ
ンゴム(BR),スチレン−ブタジエンゴム(SB
R),アクリロニトリルブタジエンゴム(NBR),ク
ロロプレンゴム(CR),ブチルゴム(IIR)などが
挙げられる。この(A)成分の天然ゴムやジエン系合成
ゴムは単独で用いてもよく、二種以上を組み合わせて用
いてもよい。本発明のゴム組成物においては、(B)成
分の老化防止剤として、式(I)
BEST MODE FOR CARRYING OUT THE INVENTION In the rubber composition of the present invention,
As the component (A), a natural rubber and / or a diene-based synthetic rubber is used. Here, as the diene-based synthetic rubber,
For example, polyisoprene synthetic rubber (IR), polybutadiene rubber (BR), styrene-butadiene rubber (SB)
R), acrylonitrile butadiene rubber (NBR), chloroprene rubber (CR), butyl rubber (IIR) and the like. The natural rubber and the diene-based synthetic rubber of the component (A) may be used alone or in combination of two or more. In the rubber composition of the present invention, as the antioxidant of the component (B), a compound represented by the formula (I):

【0007】[0007]

【化1】 Embedded image

【0008】で表されるN−(1,3−ジメチルブチ
ル)−N’−フェニル−p−フェニレンジアミン(6
C)と、式(II)
N- (1,3-dimethylbutyl) -N'-phenyl-p-phenylenediamine (6)
C) and formula (II)

【0009】[0009]

【化2】 Embedded image

【0010】で表される2,2,4−トリメチル−1,
2−ジヒドロキノリン重合物(RD)との混合物が用い
られる。上記式(I)で表される老化防止剤6Cは、天
然ゴム,BR,IR,SBRなどの老化防止剤兼オゾン
劣化防止剤として知られており、酸化,銅害,屈曲亀裂
などの防止作用に優れている。このものは、4−アミノ
ジフェニルアミンを水素の存在下メチルイソブチルケト
ンで還元アルキル化することにより製造することがで
き、また市販品として容易に入手することができる。
2,2,4-trimethyl-1,
A mixture with a 2-dihydroquinoline polymer (RD) is used. The anti-aging agent 6C represented by the above formula (I) is known as an anti-aging agent and an ozone deterioration preventing agent for natural rubber, BR, IR, SBR and the like, and has an action of preventing oxidation, copper damage, bending cracks and the like. Is excellent. This can be produced by reductive alkylation of 4-aminodiphenylamine with methyl isobutyl ketone in the presence of hydrogen, and can be easily obtained as a commercial product.

【0011】一方、式(II) で表されるRDは、天然ゴ
ム,SBR,IR,BR,NBR,CR,EPDMなど
に対して、通常の老化防止作用を有するとともに、特に
優れた熱劣化防止作用を有することが知られている。こ
のものはアニリンとアセトンとを触媒の存在下縮合させ
ることによって得られる重合物であるが、本発明におい
ては、nが2〜3の精製品(RD−S)が好適である。
このものは市販品として容易に入手することができる。
本発明においては、(B)成分として、前記6CとRD
とを、重量比20:1ないし1:1の割合で組み合わせ
たものが用いられる。この使用割合が上記範囲にあれ
ば、相乗効果が発揮され、走行末期におけるタイヤ中の
ゴムの劣化が効果的に抑制されるとともに、タイヤコー
ドとゴムとの接着性が向上し、一層タイヤの耐久性が向
上する。使用割合が、前記範囲を逸脱すると相乗効果が
充分に発揮されず、本発明の目的が達せられない。効果
の点から、この6CとRDの好ましい使用割合は、重量
比10:1ないし2:1の範囲であり、最も好ましくは
重量比9:1ないし7:1の範囲である。
On the other hand, RD represented by the formula (II) has an ordinary anti-aging effect on natural rubber, SBR, IR, BR, NBR, CR, EPDM, etc. and has particularly excellent heat deterioration prevention. It is known to have an effect. This is a polymer obtained by condensing aniline and acetone in the presence of a catalyst. In the present invention, a purified product (RD-S) having n of 2 to 3 is preferred.
This can be easily obtained as a commercial product.
In the present invention, as the component (B), 6C and RD
Are used in a weight ratio of 20: 1 to 1: 1. When the use ratio is within the above range, a synergistic effect is exhibited, deterioration of the rubber in the tire at the end of traveling is effectively suppressed, and the adhesion between the tire cord and the rubber is improved, and the tire durability is further improved. The performance is improved. If the use ratio is out of the above range, the synergistic effect is not sufficiently exhibited, and the object of the present invention cannot be achieved. From the viewpoint of the effect, the preferred proportion of 6C and RD is in the range of 10: 1 to 2: 1 by weight, most preferably in the range of 9: 1 to 7: 1.

【0012】本発明のゴム組成物における(B)成分の
含有量、すなわち6CとRDとの合計含有量は、(A)
成分の天然ゴムやジエン系合成ゴム100重量部当た
り、通常1〜5重量部の範囲である。この含有量が1重
量部未満では劣化防止効果が充分に発揮されないおそれ
があり、5重量部を超えるとその量の割には効果の向上
が認められず、むしろ他の物性が損なわれる原因とな
る。なお、6CとRDとの使用割合が異なっても、
(B)成分の含有量が同じであれば、初期ゴム物性,例
えば破断時伸びや破断時の引張り強度及び加工性などは
ほとんど変わらない。本発明のゴム組成物には、前記各
成分以外に、ゴム業界で通常使用される配合剤を通常の
配合量で適宜配合することができる。具体的には、カー
ボンブラックやシリカなどの充填剤、アロマオイルなど
の軟化剤、硫黄などの加硫剤、ジフェニルグアニジンな
どのグアニジン類,メルカプトベンゾチアゾールなどの
チアゾール類,N,N’−ジシクロヘキシル−2−ベン
ゾチアゾリルスルフェンアミドなどのスルフェンアミド
類,テトラメチルチウラムジスルフィドなどのチウラム
類などの加硫促進剤、酸化亜鉛などの加硫促進助剤、ス
テアリン酸、他の老化防止剤などである。
The content of the component (B) in the rubber composition of the present invention, that is, the total content of 6C and RD, is defined as (A)
It is usually in the range of 1 to 5 parts by weight per 100 parts by weight of natural rubber or diene-based synthetic rubber as a component. If the content is less than 1 part by weight, the effect of preventing deterioration may not be sufficiently exerted. If the content exceeds 5 parts by weight, no improvement in the effect is recognized for the amount, and other physical properties may be impaired. Become. In addition, even if the use ratio of 6C and RD is different,
If the content of the component (B) is the same, the initial rubber properties such as elongation at break, tensile strength at break and workability hardly change. In the rubber composition of the present invention, in addition to the above components, a compounding agent usually used in the rubber industry can be appropriately compounded in a usual compounding amount. Specifically, fillers such as carbon black and silica, softeners such as aroma oil, vulcanizing agents such as sulfur, guanidines such as diphenylguanidine, thiazoles such as mercaptobenzothiazole, N, N'-dicyclohexyl- Vulcanization accelerators such as sulfenamides such as 2-benzothiazolylsulfenamide, thiurams such as tetramethylthiuram disulfide, vulcanization accelerators such as zinc oxide, stearic acid, and other antiaging agents. is there.

【0013】これらのうち、カーボンブラックやシリカ
などの充填剤は加硫ゴムの引張り強さ,破断強度,モジ
ュラス,硬さなどの増加、及び耐摩耗性,引張り抵抗性
の向上などの補強剤として知られており、酸化亜鉛は脂
肪酸と錯化合物を形成し、加硫促進効果を高める加硫促
進剤として知られている。
Among them, fillers such as carbon black and silica are used as reinforcing agents for increasing the tensile strength, breaking strength, modulus, hardness, etc. of the vulcanized rubber, and improving the abrasion resistance and tensile resistance. Zinc oxide is known as a vulcanization accelerator which forms a complex compound with a fatty acid to enhance the vulcanization acceleration effect.

【0014】[0014]

【実施例】次に、本発明を実施例により、さらに詳細に
説明するが、本発明は、これらの例によってなんら限定
されるものではない。 実施例1 天然ゴム(テックビーハング社製、商品名:RSS#
4)100重量部に対し、カーボンブラック〔東海カー
ボン(株)製、N330〕60重量部、酸化亜鉛5重量
部、第1表に示す量の老化防止剤6C〔大内新興化学工
業(株)製、商品名:ノクラック6C〕及び/又はRD
−S〔精工(株)製、商品名:ノンフレックス〕、加硫
促進剤N,N’−ジシクロヘキシル−2−ベンゾチアゾ
リルスルフェンアミド〔大内新興化学工業(株)製、商
品名:ノクセラーDZ〕1重量部及び硫黄5重量部を配
合し、No.1〜No.11の11種類のゴム組成物を
調製した。
Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples. Example 1 Natural rubber (manufactured by Tech Bee Hang Co., trade name: RSS #
4) 100 parts by weight, 60 parts by weight of carbon black (N330, manufactured by Tokai Carbon Co., Ltd.), 5 parts by weight of zinc oxide, antioxidant 6C in the amount shown in Table 1 [Ouchi Shinko Chemical Co., Ltd. And trade name: Nocrack 6C] and / or RD
-S [manufactured by Seiko Co., Ltd., trade name: non-flex], vulcanization accelerator N, N'-dicyclohexyl-2-benzothiazolylsulfenamide [manufactured by Ouchi Shinko Chemical Co., Ltd., trade name: Noxeller DZ] and 1 part by weight of sulfur and 5 parts by weight of sulfur. 1 to No. Eleven types of rubber compositions were prepared.

【0015】次に、これらのゴム組成物を用いて各CR
A試験(cord/rubber adhesion test) サンプルを作製
し、80℃の空気中に1ヶ月間放置したのち、下記の方
法に従って、コードとゴムの接着性及びゴムの劣化防止
性を評価した。その結果を第1表に示す。 (1)コードとゴムの接着性 ASTM−D−2229の方法に従い、コードのゴム付
着率(%)を求め、接着性を評価した。数値が高いほど
接着性が良いことを示す。 (2)ゴムの劣化防止性 下記の方法によって、ゴム中の酸素濃度の増加量(%)
を測定し、ゴムの劣化防止性を評価した。数値が小さい
ほど劣化防止性が良いことを示す。 測定方法:サンプルゴム組成物約10mgを精秤し、H
ERAEUS社製,CHN−O RAPIDを用いて、
約1100℃で窒素/ヘリウム混合雰囲気(95/5)
中で燃焼させ、燃焼ガスを炭素触媒に通気させることに
より、酸素を一酸化炭素に変換した後、赤外分光計によ
り酸素濃度(Os) を測定した。また劣化試験前のサン
プルゴム組成物についても、上記と同様にして酸素濃度
(OC)を測定し、その両者の差、即ち(Os−OC) を酸
素濃度の増加量(%)として評価した。
Next, using these rubber compositions, each CR
A test (cord / rubber adhesion test) A sample was prepared and left in the air at 80 ° C. for one month, and then the adhesion between the cord and the rubber and the prevention of rubber deterioration were evaluated according to the following methods. Table 1 shows the results. (1) Adhesion between cord and rubber According to the method of ASTM-D-2229, the rubber adhesion rate (%) of the cord was determined, and the adhesion was evaluated. The higher the value, the better the adhesiveness. (2) Deterioration prevention of rubber Increase in oxygen concentration in rubber by the following method (%)
Was measured, and the deterioration prevention properties of the rubber were evaluated. A smaller value indicates better deterioration prevention. Measurement method: About 10 mg of a sample rubber composition was precisely weighed,
Using CHN-O RAPID manufactured by ERAEUS,
Nitrogen / helium mixed atmosphere (95/5) at about 1100 ° C
After the oxygen was converted into carbon monoxide by burning in a combustion catalyst and passing the combustion gas through a carbon catalyst, the oxygen concentration (O s ) was measured by an infrared spectrometer. The regard to sample rubber composition before deterioration test, in the same manner as described above to measure the oxygen concentration (O C), the difference of both, i.e. as an increase of (O s -O C) the oxygen concentration (%) evaluated.

【0016】[0016]

【表1】 [Table 1]

【0017】6C:N−(1,3−ジメチルブチル)−
N’−フェニル−p−フェニレンジアミン,大内新興化
学工業(株)製、商品名:ノクラック6C RD−S:2,2,4−トリメチル−1,2−ジヒドロ
キノリン重合物の精製品,精工(株)製,商品名:ノン
フレックス 第1表から明らかなように、6C/RD−S重量比が本
発明で規定する20/1〜1/1の範囲にあるものは、
この範囲を逸脱するものに比べて、相乗効果により、ゴ
ムとコードとの接着性及び劣化防止性に優れることが分
かる。 実施例2 実施例1で得られたNo.1,No.3,No.6,N
o.9及びNo.11のゴム組成物を用い、試験用タイ
ヤ(11R22.5)をそれぞれ作製した。 次に、各タ
イヤについて、150%荷重のドラム試験を実施し、ド
ラム走行距離を求めた。さらに、ドラム試験後のタイヤ
について、実施例1と同様にして、ゴム中の酸素濃度を
測定して、ゴムの劣化防止性を評価するとともに、コー
ドのゴム付着率を求め、接着性を評価した。結果を第2
表に示す。
6C: N- (1,3-dimethylbutyl)-
N'-phenyl-p-phenylenediamine, manufactured by Ouchi Shinko Chemical Co., Ltd., trade name: Nocrack 6C RD-S: purified product of 2,2,4-trimethyl-1,2-dihydroquinoline polymer, refined As is clear from Table 1, the product having a 6C / RD-S weight ratio in the range of 20/1 to 1/1 defined by the present invention is as follows.
It can be understood that the adhesiveness between the rubber and the cord and the prevention of deterioration are superior due to the synergistic effect as compared with those deviating from this range. Example 2 No. 2 obtained in Example 1 was obtained. 1, No. 3, No. 6, N
o. 9 and No. 9 Using the rubber compositions of No. 11, test tires (11R22.5) were prepared. Next, a drum test with a 150% load was performed on each tire to determine the drum travel distance. Further, for the tire after the drum test, the oxygen concentration in the rubber was measured in the same manner as in Example 1 to evaluate the deterioration prevention of the rubber, the rubber adhesion rate of the cord was obtained, and the adhesion was evaluated. . Second result
It is shown in the table.

【0018】[0018]

【表2】 [Table 2]

【0019】(注) 6C,RD−S:第1表の脚注と同じである。 第1表から明らかなように、6C/RD−S重量比が本
発明で規定する20/1〜1/1の範囲にあるものは、
この範囲を逸脱するものに比べて、相乗効果により、ド
ラム走行距離が長く、かつ走行末期のタイヤにおいて
も、ゴムの劣化防止性及びコードとの接着性が良好であ
ることが分かる。
(Note) 6C, RD-S: Same as the footnote in Table 1. As is clear from Table 1, those having a 6C / RD-S weight ratio in the range of 20/1 to 1/1 specified in the present invention are:
Compared to those deviating from this range, the synergistic effect shows that the drum traveling distance is longer, and even in the tire at the end of traveling, the rubber deterioration prevention property and the adhesion to the cord are better.

【0020】[0020]

【発明の効果】本発明のゴム組成物は、老化防止剤とし
て、6CとRDを特定の割合で組み合わせて含有させる
ことにより、その相乗効果によって、優れた劣化防止性
能を発揮し、タイヤに用いた場合、特に走行末期におい
ても良好な劣化防止性を発揮するとともに、コードとゴ
ムとの接着性の向上をもたらし、タイヤの耐久性を向上
させる効果を奏する。
According to the rubber composition of the present invention, by combining 6C and RD in a specific ratio as an anti-aging agent, the rubber composition exhibits excellent deterioration preventing performance due to its synergistic effect and is used for tires. In such a case, particularly at the end of running, the tire exhibits good deterioration prevention properties, improves the adhesion between the cord and the rubber, and has the effect of improving the durability of the tire.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 (A)天然ゴム及び/又はジエン系合成
ゴムと、(B)N−(1,3−ジメチルブチル)−N’
−フェニル−p−フェニレンジアミンと2,2,4−ト
リメチル−1,2−ジヒドロキノリン重合物とを重量比
20:1ないし1:1の割合で組み合わせたものを含有
することを特徴とするゴム組成物。
1. A natural rubber and / or a diene-based synthetic rubber, and (B) N- (1,3-dimethylbutyl) -N ′.
Containing a combination of -phenyl-p-phenylenediamine and a 2,2,4-trimethyl-1,2-dihydroquinoline polymer in a weight ratio of 20: 1 to 1: 1 Composition.
【請求項2】 (B)成分の含有量が、(A)成分10
0重量部当たり、1〜5重量部である請求項1記載のゴ
ム組成物。
2. The composition according to claim 1, wherein the content of the component (B) is 10%.
The rubber composition according to claim 1, wherein the amount is 1 to 5 parts by weight per 0 parts by weight.
JP10207535A 1998-07-23 1998-07-23 Rubber composition Pending JP2000038479A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10207535A JP2000038479A (en) 1998-07-23 1998-07-23 Rubber composition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10207535A JP2000038479A (en) 1998-07-23 1998-07-23 Rubber composition

Publications (1)

Publication Number Publication Date
JP2000038479A true JP2000038479A (en) 2000-02-08

Family

ID=16541344

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10207535A Pending JP2000038479A (en) 1998-07-23 1998-07-23 Rubber composition

Country Status (1)

Country Link
JP (1) JP2000038479A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100360938B1 (en) * 2000-11-15 2002-11-23 한국타이어 주식회사 Rubber composition for sidewall of radial tire for truck and bus
KR100369615B1 (en) * 2000-06-09 2003-01-29 금호산업 주식회사 Undertread rubber composition for bias
KR100449891B1 (en) * 2001-09-20 2004-09-22 금호타이어 주식회사 Tread compound for truck and bus tire

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100369615B1 (en) * 2000-06-09 2003-01-29 금호산업 주식회사 Undertread rubber composition for bias
KR100360938B1 (en) * 2000-11-15 2002-11-23 한국타이어 주식회사 Rubber composition for sidewall of radial tire for truck and bus
KR100449891B1 (en) * 2001-09-20 2004-09-22 금호타이어 주식회사 Tread compound for truck and bus tire

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