JP3133816B2 - Rubber composition and tire using the same - Google Patents
Rubber composition and tire using the sameInfo
- Publication number
- JP3133816B2 JP3133816B2 JP04067218A JP6721892A JP3133816B2 JP 3133816 B2 JP3133816 B2 JP 3133816B2 JP 04067218 A JP04067218 A JP 04067218A JP 6721892 A JP6721892 A JP 6721892A JP 3133816 B2 JP3133816 B2 JP 3133816B2
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- tire
- weight
- compound
- 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.)
- Expired - Lifetime
Links
- 229920001971 elastomer Polymers 0.000 title claims description 80
- 239000005060 rubber Substances 0.000 title claims description 80
- 239000000203 mixture Substances 0.000 title claims description 25
- 238000004073 vulcanization Methods 0.000 claims description 46
- -1 thiuram compound Chemical class 0.000 claims description 34
- IOJUPLGTWVMSFF-UHFFFAOYSA-N benzothiazole Chemical compound C1=CC=C2SC=NC2=C1 IOJUPLGTWVMSFF-UHFFFAOYSA-N 0.000 claims description 32
- 229960002447 thiram Drugs 0.000 claims description 20
- 239000012990 dithiocarbamate Substances 0.000 claims description 14
- 150000001875 compounds Chemical class 0.000 claims description 12
- 229910052787 antimony Inorganic materials 0.000 claims description 5
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical group [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 125000000217 alkyl group Chemical group 0.000 claims description 4
- 125000004432 carbon atom Chemical group C* 0.000 claims description 4
- 239000004902 Softening Agent Substances 0.000 claims description 3
- 150000004659 dithiocarbamates Chemical class 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 claims 1
- 230000000052 comparative effect Effects 0.000 description 13
- 230000020169 heat generation Effects 0.000 description 12
- KUAZQDVKQLNFPE-UHFFFAOYSA-N thiram Chemical compound CN(C)C(=S)SSC(=S)N(C)C KUAZQDVKQLNFPE-UHFFFAOYSA-N 0.000 description 11
- IUJLOAKJZQBENM-UHFFFAOYSA-N n-(1,3-benzothiazol-2-ylsulfanyl)-2-methylpropan-2-amine Chemical compound C1=CC=C2SC(SNC(C)(C)C)=NC2=C1 IUJLOAKJZQBENM-UHFFFAOYSA-N 0.000 description 9
- YXIWHUQXZSMYRE-UHFFFAOYSA-N 1,3-benzothiazole-2-thiol Chemical compound C1=CC=C2SC(S)=NC2=C1 YXIWHUQXZSMYRE-UHFFFAOYSA-N 0.000 description 8
- 238000013329 compounding Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 239000011701 zinc Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 235000019198 oils Nutrition 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- DFWCPLGXFMSUCW-UHFFFAOYSA-N 3-(dimethylamino)propyl carbamimidothioate;hydron;dichloride Chemical compound Cl.Cl.CN(C)CCCSC(N)=N DFWCPLGXFMSUCW-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- PAFZNILMFXTMIY-UHFFFAOYSA-N cyclohexylamine Chemical class NC1CCCCC1 PAFZNILMFXTMIY-UHFFFAOYSA-N 0.000 description 2
- AFZSMODLJJCVPP-UHFFFAOYSA-N dibenzothiazol-2-yl disulfide Chemical compound C1=CC=C2SC(SSC=3SC4=CC=CC=C4N=3)=NC2=C1 AFZSMODLJJCVPP-UHFFFAOYSA-N 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- LFMQNMXVVXHZCC-UHFFFAOYSA-N 1,3-benzothiazol-2-yl n,n-diethylcarbamodithioate Chemical class C1=CC=C2SC(SC(=S)N(CC)CC)=NC2=C1 LFMQNMXVVXHZCC-UHFFFAOYSA-N 0.000 description 1
- JDICEKWSLNPYSN-UHFFFAOYSA-N 2-(2,4-dinitrophenyl)-1,3-benzothiazole-4-thiol Chemical compound [O-][N+](=O)C1=CC([N+](=O)[O-])=CC=C1C1=NC2=C(S)C=CC=C2S1 JDICEKWSLNPYSN-UHFFFAOYSA-N 0.000 description 1
- QMZTUYSKUCNQSO-UHFFFAOYSA-N 2-ethylhexyl carbamodithioate;zinc Chemical compound [Zn].CCCCC(CC)CSC(N)=S QMZTUYSKUCNQSO-UHFFFAOYSA-N 0.000 description 1
- QRYFCNPYGUORTK-UHFFFAOYSA-N 4-(1,3-benzothiazol-2-yldisulfanyl)morpholine Chemical compound C1COCCN1SSC1=NC2=CC=CC=C2S1 QRYFCNPYGUORTK-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241001441571 Hiodontidae Species 0.000 description 1
- 239000006057 Non-nutritive feed additive Substances 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 239000010692 aromatic oil Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- CSNJTIWCTNEOSW-UHFFFAOYSA-N carbamothioylsulfanyl carbamodithioate Chemical compound NC(=S)SSC(N)=S CSNJTIWCTNEOSW-UHFFFAOYSA-N 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- HKOUMIFWHSIIBQ-UHFFFAOYSA-N dioctylcarbamothioylsulfanyl n,n-dioctylcarbamodithioate Chemical compound CCCCCCCCN(CCCCCCCC)C(=S)SSC(=S)N(CCCCCCCC)CCCCCCCC HKOUMIFWHSIIBQ-UHFFFAOYSA-N 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- GQWNEBHACPGBIG-UHFFFAOYSA-N n-(1,3-benzothiazol-2-ylsulfanyl)-2-[2-(1,3-benzothiazol-2-ylsulfanylamino)ethoxy]ethanamine Chemical compound C1=CC=C2SC(SNCCOCCNSC=3SC4=CC=CC=C4N=3)=NC2=C1 GQWNEBHACPGBIG-UHFFFAOYSA-N 0.000 description 1
- CMAUJSNXENPPOF-UHFFFAOYSA-N n-(1,3-benzothiazol-2-ylsulfanyl)-n-cyclohexylcyclohexanamine Chemical compound C1CCCCC1N(C1CCCCC1)SC1=NC2=CC=CC=C2S1 CMAUJSNXENPPOF-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
- 229910052759 nickel Inorganic materials 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
- 239000010690 paraffinic oil Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- GPNLWUFFWOYKLP-UHFFFAOYSA-N s-(1,3-benzothiazol-2-yl)thiohydroxylamine Chemical compound C1=CC=C2SC(SN)=NC2=C1 GPNLWUFFWOYKLP-UHFFFAOYSA-N 0.000 description 1
- 150000003839 salts Chemical class 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
- 229910052714 tellurium Inorganic materials 0.000 description 1
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
- 150000003751 zinc Chemical class 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Landscapes
- Tires In General (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は、ゴム組成物及びこれを
トレッドゴムのうちベースゴムに使用したタイヤに関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubber composition and a tire using the same as a base rubber among tread rubbers.
【0002】[0002]
【従来の技術】従来より、タイヤ等各種ゴム製品用の加
硫可能なゴム組成物の加硫性等を向上させるために、ゴ
ム組成物中に、次式2. Description of the Related Art Conventionally, in order to improve the vulcanizability of a vulcanizable rubber composition for various rubber products such as tires, the following formula is contained in a rubber composition.
【化3】 で表されるTMTD(テトラメチルチウラムジスルフィド)
等のチウラム系化合物を配合することが知られている。
また、高速で走行することのできる乗用車等のタイヤの
トレッドゴムには、高いグリップ性(トレッドと路面と
の間の摩擦係数を大きくすること)が要求されるため、
トレッドゴムのキャップゴムに、ヒステリシスロスの大
きいものを使用するのが一般的である。このキャップゴ
ムの内側のベースゴムには、キャップゴム同様の耐熱性
の他に、蓄熱を抑えるため、比較的大きな動的歪下で、
しかも、高温下での自己発熱性を小さくする(低発熱で
ある)必要がある。この目的のためには、機械的、熱的
に強い加硫鎖を生成することが有効である。そこで、上
記要求を満たすために、上記TMTD(テトラメチルチウラ
ムジスルフィド)等のチウラム化合物をベースゴムの加
硫促進剤として使用することが考えられる。Embedded image TMTD (tetramethylthiuram disulfide) represented by
It is known to incorporate a thiuram-based compound such as
In addition, tread rubber of tires such as passenger cars that can run at high speeds is required to have high grip properties (enhance the coefficient of friction between the tread and the road surface).
In general, a tread rubber cap rubber having a large hysteresis loss is used. In addition to the heat resistance similar to the cap rubber, the base rubber inside this cap rubber under relatively large dynamic strain to suppress heat storage,
In addition, it is necessary to reduce the self-heating property under high temperature (low heat generation). For this purpose, it is effective to produce vulcanized chains that are mechanically and thermally strong. Therefore, in order to satisfy the above requirements, it is conceivable to use a thiuram compound such as the above-mentioned TMTD (tetramethylthiuram disulfide) as a vulcanization accelerator for the base rubber.
【0003】[0003]
【発明が解決しようとする課題】しかしながら、上記の
ような従来のゴム配合物にあっては、加硫速度、加工安
定性、耐熱性、及び発熱性、を共に充分な程度満足させ
ることができず、加えて、加工工程中に焦け(スコー
チ)の現象を生じることがあった。また、従来のベース
ゴムにあっては、耐熱性及び高温下での発熱性の点にお
いて、近年の更なる高速化(例えば、200 Km/h以上)
には充分には対応できなくなった。本発明は、上記不都
合に鑑み、加硫速度、加工安定性、耐熱性、及び発熱性
を共に充分に満足することのできるゴム組成物及びこれ
をベースゴムに用いた高速耐久性に優れたタイヤを提供
することを目的とする。However, in the conventional rubber compound as described above, all of the vulcanization rate, processing stability, heat resistance and heat generation can be satisfied to a sufficient extent. In addition, in some cases, scorching occurs during the processing step. In addition, in the case of the conventional base rubber, in terms of heat resistance and heat generation at high temperatures, the speed has been further increased in recent years (for example, 200 km / h or more).
Can no longer respond adequately. In view of the above disadvantages, the present invention provides a rubber composition capable of sufficiently satisfying all of the vulcanization rate, processing stability, heat resistance, and heat generation, and a tire using the same as a base rubber and having excellent high-speed durability. The purpose is to provide.
【0004】[0004]
【課題を解決するための手段】本発明者らは、鋭意検討
の結果、加硫促進の作用を有する特定のチウラム化合物
及び特定のジチオカルバメート化合物よりなる群から選
択される化合物と、ベンゾチアゾール系加硫促進剤とを
組合わせて使用することにより、上記目的を達成できる
ことを見い出だした。Means for Solving the Problems As a result of intensive studies, the present inventors have found that a compound selected from the group consisting of a specific thiuram compound and a specific dithiocarbamate compound having a vulcanization accelerating action, and a benzothiazole-based compound It has been found that the above object can be achieved by using a vulcanization accelerator in combination.
【0005】本発明の構成は以下の通りである。即ち、
本発明のゴム組成物は、スチレンブチジエンゴム(以
下、SBR という)を50重量部以上含有するゴム成分100
重量部に対して、軟化剤20重量部以下、次式The structure of the present invention is as follows. That is,
The rubber composition of the present invention has a rubber component 100 containing at least 50 parts by weight of a styrene butidiene rubber (hereinafter, referred to as SBR).
20 parts by weight or less of a softening agent with respect to parts by weight, the following formula
【化4】 (式中、R1, R2, R3, およびR4は、それぞれ独立に、炭
素数7〜12、好ましくは8の直鎖または分岐鎖アルキル
基を示す)で表されるチウラム化合物、及び、次式Embedded image (Wherein, R 1 , R 2 , R 3 , and R 4 each independently represent a straight-chain or branched-chain alkyl group having 7 to 12 carbon atoms, preferably 8 carbon atoms), and , The following equation
【化5】 (式中、R5及びR6は、それぞれ独立に、炭素数7〜12、
好ましくは8の直鎖または分岐鎖アルキル基を示し、M
は2価以上の金属であり、nはMの金属の原子価に等し
い数である)で表されるジチオカルバメート化合物より
なる群から選択された化合物のうち少なくとも1つを0.
5 〜2.0 重量部、及びベンゾチアゾール系加硫促進剤0.
5 〜2.0 重量部を配合する。また、前記ベンゾチアゾー
ル系加硫促進剤と、前記チウラム化合物及び前記ジチオ
カルバメート化合物よりなる群から選択される化合物の
比が0.5 〜1.5 であると好ましい。Embedded image (Wherein, R 5 and R 6 each independently represent a carbon number of 7 to 12,
Preferably a straight or branched alkyl group of 8;
Is a divalent or higher valent metal, and n is a number equal to the valency of the metal of M)) at least one of the compounds selected from the group consisting of dithiocarbamate compounds
5 to 2.0 parts by weight, and benzothiazole vulcanization accelerator 0.
Add 5 to 2.0 parts by weight. Further, the ratio of the benzothiazole vulcanization accelerator to a compound selected from the group consisting of the thiuram compound and the dithiocarbamate compound is preferably 0.5 to 1.5.
【0006】また、前記R1, R2, R3, R4, R5及びR6がそ
れぞれ2−エチルヘキシル基であり、且つMがアンチモ
ンであり、nが3であると好ましい。更に、上記各ゴム
組成物は各種ゴム製品に使用可能であるが、特にタイヤ
のトレッドのベースゴムに使用すると好ましく、例え
ば、乗用車用、二輪車用及びレーシングカー等のタイヤ
が挙げられる。It is preferable that R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are each a 2-ethylhexyl group, M is antimony, and n is 3. Further, each of the above rubber compositions can be used for various rubber products, and is particularly preferably used for a base rubber of a tread of a tire, and examples thereof include tires for passenger cars, motorcycles, and racing cars.
【0007】上記ゴム組成物を製造する際には、通常行
われているミキサーやニーダーで混練りする方法にて行
うことができる。またこのとき、必要に応じてカーボン
ブラック等の充填剤、老化防止剤、樹脂、ステアリン
酸、酸化亜鉛等の加硫促進助剤、硫黄等の加硫剤、タッ
キファイヤー等の加工助剤等を配合することができる。The above rubber composition can be produced by kneading with a conventional mixer or kneader. At this time, if necessary, a filler such as carbon black, an antioxidant, a resin, a vulcanization accelerator such as stearic acid and zinc oxide, a vulcanizing agent such as sulfur, a processing aid such as tackifier, etc. Can be blended.
【0008】また、タイヤのトレッドゴムのベースゴム
として使用する際には、通常のタイヤの製造方法にて行
うことができる。ここにおいて、ゴム成分中、SBR を50
重量部以上としたのは、これらよりなるゴム組成物を例
えばタイヤのトレッドゴムのベースゴムとして使用した
場合に、操縦安定性及び耐熱性をもたせるためであり、
50重量部未満であると、ヒステリシスロスが小さくなり
過ぎ操縦安定性が劣り、且つ耐熱性が大幅に悪化しゴム
成分が分解して発泡(ブローアウト)しやすくなるので
不都合である。When used as a base rubber for a tread rubber of a tire, it can be carried out by a usual tire manufacturing method. Here, in the rubber component, SBR is 50
The weight part or more is used, for example, when a rubber composition composed of these is used as a base rubber of a tread rubber of a tire, in order to impart steering stability and heat resistance,
If the amount is less than 50 parts by weight, the hysteresis loss becomes too small, the steering stability is deteriorated, and the heat resistance is greatly deteriorated, so that the rubber component is easily decomposed and foaming (blowing out) is disadvantageously caused.
【0009】また、軟化剤としては、アロマチックオイ
ル、スピンドルオイル、ナフテニックオイル、パラフィ
ニックオイル、植物油、サブ等が挙げられるが、軟化剤
が20重量部超過では、例えばタイヤのトレッドゴムのベ
ースゴムとして使用したときに発熱性と耐熱性が悪くな
り不都合である。Examples of the softener include aromatic oil, spindle oil, naphthenic oil, paraffinic oil, vegetable oil, sub oil and the like. If the softener exceeds 20 parts by weight, for example, the base of tire tread rubber may be used. When used as a rubber, heat generation and heat resistance deteriorate, which is inconvenient.
【0010】また、チウラム化合物及びジチオカルバメ
ート化合物よりなる群から選択される化合物が0.5 重量
部未満であると、例えばタイヤのトレッドゴムのベース
ゴムとして使用する場合に、十分な加硫密度が得られず
不都合であり、また2.0 重量部超過であると、ベースゴ
ムとして加硫密度が上がり過ぎ不都合である。また、
R1, R2, R3及びR4の炭素数が6以下では、ゴム中での分
散が悪くなり、耐熱性等が劣り不都合であり、また、13
以上では、加硫速度が非常に遅れるため不都合である。If the amount of the compound selected from the group consisting of the thiuram compound and the dithiocarbamate compound is less than 0.5 part by weight, sufficient vulcanization density can be obtained, for example, when used as a base rubber for a tread rubber of a tire. If it exceeds 2.0 parts by weight, the vulcanization density of the base rubber is too high, which is disadvantageous. Also,
When the carbon number of R 1 , R 2 , R 3 and R 4 is 6 or less, the dispersion in the rubber becomes poor, and the heat resistance and the like are inferior.
Above is disadvantageous because the vulcanization rate is extremely slow.
【0011】また、同様に、R5およびR6の炭素数が6以
下では、ゴム中での分散が悪くなり、耐熱性等が劣り不
都合であり、また、13以上では、加硫速度が非常に遅れ
るため不都合であり、Mの金属としては、アンチモン、
鉄、銅、亜鉛、ニッケル、鉛、テルル等が上げられる
が、Mが1価の場合は、加硫促進効果が不充分であるた
め不都合である。Similarly, when the carbon number of R 5 and R 6 is 6 or less, the dispersion in the rubber becomes poor, and the heat resistance and the like are inferior, and when the carbon number is 13 or more, the vulcanization rate is extremely low. It is inconvenient because the metal is M. Antimony,
Iron, copper, zinc, nickel, lead, tellurium and the like can be mentioned, but when M is monovalent, it is inconvenient because the effect of promoting vulcanization is insufficient.
【0012】また、ベンゾチアゾール系加硫促進剤とし
ては、メルカプトベンゾチアゾール(MBT) 、ジベンゾチ
アジルジスルフィド(MBTS)、N−t−ブチル−2−ベン
ゾチアゾリルスルフェンアミド(TBBS)、N−シクロヘキ
シル−2−ベンゾチアゾリルスルフェンアミド(CBS) 、
N−オキシジエチレン−2−ベンゾチアゾリルスルフェ
ンアミド(MBS) 、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(DCBS)、メルカプトベン
ゾチアゾールの亜鉛塩、2−(4−モルフォリノジチ
オ)ベンゾチアゾール、2−(2,4−ジニトロ−フェ
ニル)−メルカプトベンゾチアゾール、メルカプトベン
ゾチアゾールとシクロヘキシルアミンの塩、N,N−ジ
エチルチオカルバモイル−2−ベンゾチアゾリルスルフ
ィド等が挙げられるが、0.5 重量部未満では、例えば、
ベースゴムとして充分な加硫密度が得られず不都合であ
り、2.0 重量部超過では、例えばベースゴムとして加硫
密度が上がり過ぎ不都合である。The benzothiazole vulcanization accelerators include mercaptobenzothiazole (MBT), dibenzothiazyl disulfide (MBTS), Nt-butyl-2-benzothiazolylsulfenamide (TBBS), N- Cyclohexyl-2-benzothiazolylsulfenamide (CBS),
N-oxydiethylene-2-benzothiazolylsulfenamide (MBS), N, N-dicyclohexyl-2-benzothiazolylsulfenamide (DCBS), zinc salt of mercaptobenzothiazole, 2- (4-morpholinodithio ) Benzothiazole, 2- (2,4-dinitro-phenyl) -mercaptobenzothiazole, salts of mercaptobenzothiazole and cyclohexylamine, N, N-diethylthiocarbamoyl-2-benzothiazolyl sulfide, and the like, At less than 0.5 parts by weight, for example,
It is disadvantageous that a sufficient vulcanization density cannot be obtained as a base rubber. If the vulcanization density exceeds 2.0 parts by weight, for example, the vulcanization density of the base rubber is too high, which is disadvantageous.
【0013】更に、前記ベンゾチアゾール系加硫促進剤
と、前記チウラム化合物及び前記ジチオカルバメート化
合物よりなる群から選択される化合物の比が0.5 未満で
は、加硫密度における相剰効果が小さくなり、望ましい
加硫密度を得るため、より多くの配合量が必要となる。
その結果、加工安定性の優位が小さくなり不都合であ
る。また、1.5 超過で、同様に、加硫密度における相剰
効果が小さくなり、望ましい加硫密度を得るため、より
多くの配合量が必要となり、また、耐熱性の優位が小さ
くなり不都合である。Further, when the ratio of the benzothiazole-based vulcanization accelerator to the compound selected from the group consisting of the thiuram compound and the dithiocarbamate compound is less than 0.5, the effect of the addition on the vulcanization density is reduced, which is desirable. In order to obtain a vulcanized density, a larger amount is required.
As a result, the advantage of processing stability is reduced, which is inconvenient. On the other hand, if it exceeds 1.5, similarly, the effect of excess in vulcanization density is reduced, so that a larger amount of compounding is required to obtain a desired vulcanization density, and the superiority of heat resistance is disadvantageously reduced.
【0014】[0014]
【実施例】以下に、本発明を実施例に基づいて説明す
る。実施例A (実施例1〜5、比較例1〜4) 表1に、ゴム組成物の配合割合、そのゴム組成物の物性
等、及びそのゴム組成物をベースゴムに使用したタイヤ
の特性を示す。実施例Aは、チウラム化合物として、TE
HT、TOTD及びTMTD(本発明の範囲外)を用い、ジチオカ
ルバメート化合物として、EH−Sb及びEH−Znを用い、ベ
ンゾチアゾール系加硫促進剤として、TBBSを用いた。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments. Example A (Examples 1 to 5, Comparative Examples 1 to 4) Table 1 shows the compounding ratio of the rubber composition, the physical properties of the rubber composition, and the characteristics of the tire using the rubber composition as a base rubber. Show. Example A was prepared using TE as a thiuram compound.
HT, TOTD and TMTD (outside the scope of the present invention) were used, EH-Sb and EH-Zn were used as dithiocarbamate compounds, and TBBS was used as a benzothiazole vulcanization accelerator.
【0015】また、ベンゾチアゾール系加硫促進剤(TBB
S)とチウラム化合物及び/又はジチオカルバメート化合
物の比(TBBS /(チウラム化合物及び/又はジチオカル
バメート化合物))を一定(1) にし、チウラム化合物、ジ
チオカルバメート化合物、及びベンゾチアゾール系加硫
促進剤の配合割合を変え、これに伴って軟化剤の配合割
合を変えた。Also, a benzothiazole vulcanization accelerator (TBB)
S) and the ratio of the thiuram compound and / or dithiocarbamate compound (TBBS / (thiuram compound and / or dithiocarbamate compound)) are kept constant (1), and the thiuram compound, dithiocarbamate compound and benzothiazole vulcanization accelerator The mixing ratio was changed, and the mixing ratio of the softener was changed accordingly.
【0016】また、本発明はチウラム化合物及びジチオ
カルバメート化合物よりなる群から選択される化合物、
及びベンゾチアゾール系加硫促進剤を組み合せて使用す
ることにより所期の目的を達成するものであるため、比
較例1〜3において、いずれかの成分を欠く配合とし、
また、比較例4において、チウラム化合物として本発明
の範囲外のTMTDを使用した場合を示し、各実施例との比
較を行った。尚、比較例4のTMTDは実施例1のTEHTと同
モル数の配合量とした。Further, the present invention provides a compound selected from the group consisting of a thiuram compound and a dithiocarbamate compound,
And benzothiazole vulcanization accelerators, in order to achieve the intended purpose by using a combination thereof, in Comparative Examples 1 to 3, the composition lacking any component,
Further, in Comparative Example 4, a case where TMTD outside the scope of the present invention was used as the thiuram compound was shown, and a comparison with each Example was performed. The amount of TMTD of Comparative Example 4 was the same as the molar amount of TEHT of Example 1.
【0017】また、各試験法は、以下の通りである。 加硫速度 日本合成ゴム社製オシレーテイングデスクレオメーター
を用い、155 ℃で測定した。表中T90は最大トルク値の
90%を得るのに要する時間(単位:分)を示し、この数
値が小さい方が加硫速度が速く、好ましいことを示す。Each test method is as follows. Vulcanization rate Measured at 155 ° C. using an oscillating desk rheometer manufactured by Nippon Synthetic Rubber Co., Ltd. In the table, T90 is the maximum torque value.
Indicates the time (unit: minutes) required to obtain 90%, and the smaller the value is, the faster the vulcanization rate is and the more preferable it is.
【0018】加工安定性 島津製作所製ムーニー粘度計を用い、130 ℃で測定し
た。試験法は、JIS K6300に準拠して行い、T5(単
位:分)を求めた。この数値が大きい方が、加工安定性
に優れ、好ましいことを示す。特に、この数値が10以下
であると、通常の加工方法では、スコーチを起こすこと
が多い。Processing stability: Measured at 130 ° C. using a Mooney viscometer manufactured by Shimadzu Corporation. The test method was performed according to JIS K6300, and T5 (unit: minute) was determined. Larger values indicate better processing stability and are preferred. In particular, if this value is 10 or less, scorching often occurs in a normal processing method.
【0019】耐熱性 セイコー電子製TMA を用い、昇温速度10℃/分で試料の
熱膨張をモニターし、試料が急激な膨張をする温度(単
位:℃)をブローアウトポイントとして示した。試料は
直径8mm、高さ6mmの円柱状で、荷重は10gである。こ
の数値が大きい方が、耐熱性に優れ、好ましいことを示
す。Heat resistance Using a TMA manufactured by Seiko Denshi, the thermal expansion of the sample was monitored at a heating rate of 10 ° C./min, and the temperature (unit: ° C.) at which the sample rapidly expanded was indicated as a blowout point. The sample was cylindrical with a diameter of 8 mm and a height of 6 mm, and the load was 10 g. A larger value indicates better heat resistance and is preferred.
【0020】発熱性 グッドリッチ式フレクソメーターを用い、ASTM-D-623-5
8 の方法に準拠し行った。測定条件は、槽内温度120
℃、振動数1800rpm 、荷重28kg、歪22.5%であり、サン
プル形状は、直径30mm、高さ25.4mmである。20分後の温
度上昇を測定した。この数値が小さい方が発熱性が小さ
く、好ましいことを示す。Exothermicity Using a Goodrich Flexometer, ASTM-D-623-5
Performed according to the method of 8. The measurement conditions were as follows:
C., frequency 1800 rpm, load 28 kg, strain 22.5%, and the sample shape was 30 mm in diameter and 25.4 mm in height. The temperature rise after 20 minutes was measured. The smaller the value is, the smaller the exothermic property is, indicating that it is preferable.
【0021】加硫密度 JIS K6301(加硫ゴム物理試験方法)における「引張試
験」に準拠して測定した。ダンベル状3号形試料を用
い、300 %伸張時の弾性率をもって加硫密度とした。The vulcanization density was measured in accordance with the "tensile test" in JIS K6301 (vulcanized rubber physical test method). Using a dumbbell-shaped No. 3 sample, the vulcanization density was defined as the elastic modulus at 300% elongation.
【0022】タイヤ温度 各実施例及び各比較例の配合のゴム組成物をベースゴム
に用いたタイヤ(サイズ:205 /60R15)を製造し、ド
ラム上を200km/h で1時間走行させ走行直後のベースゴ
ム温度(単位:℃)を測定した。この数値の小さい方
が、発熱性に優れ(低発熱性であり)、好ましいことを
示す。Tire temperature A tire (size: 205 / 60R15) using the rubber composition of each example and each comparative example as a base rubber was produced, and the tire was run on a drum at 200 km / h for 1 hour, and immediately after running. The base rubber temperature (unit: ° C.) was measured. The smaller the value is, the better the exothermic property (the lower the exothermic property) and the more preferable.
【0023】上記タイヤの構成は以下の通りである。即
ち、図1に示すように、トレッドゴム1はキャップゴム
1aとベースゴム1bとの2層よりなる。尚、図中、2
はベルト、3はカーカス、4はサイドウォール、5はゴ
ムフィラー、6はビードリングである。The structure of the tire is as follows. That is, as shown in FIG. 1, the tread rubber 1 includes two layers of a cap rubber 1a and a base rubber 1b. In the figure, 2
Is a belt, 3 is a carcass, 4 is a sidewall, 5 is a rubber filler, and 6 is a bead ring.
【0024】[0024]
【表1】 [Table 1]
【0025】略語の説明 TEHT テトラキス-2- エチルヘキシルチウラムジ
スルフィド(tetrakis2-ethyl hexyl thiuram disulfid
e) TOTD テトラオクチルチウラムジスルフィド(tet
ra octhyl thiuram disulfide) TMTD テトラメチルチウラムジスルフィド(tetra
methyl thiuram disulfide) EH−Sb ジ 2-エチルヘキシル ジチオカルバメー
ト アンチモン(Antimony di 2-ethyl hexyl dithiocar
bamate) EH−Zn ジ 2-エチルヘキシル ジチオカルバメー
ト 亜鉛(Zinc di 2-ethyl hexyl dithiocarbamate) TBBS N-t-ブチルベンゾチアゾリルスルフェンア
ミド(N-t-buthyl benzothiazolyl sulfenamide)Description of abbreviations TEHT tetrakis2-ethylhexyl thiuram disulfid
e) TOTD tetraoctylthiuram disulfide (tet
ra octhyl thiuram disulfide) TMTD Tetramethylthiuram disulfide
methyl thiuram disulfide) EH-Sb Anti-2-ethylhexyl dithiocarbamate Antimony (Antimony di 2-ethyl hexyl dithiocar
bamate) EH-Zn di 2-ethylhexyl dithiocarbamate Zinc (Zinc di 2-ethyl hexyl dithiocarbamate) TBBS Nt-buthyl benzothiazolyl sulfenamide
【0026】上記の通り、チウラム化合物及び/又はジ
チオカルバメート化合物よりなる群から選択される化合
物、及びベンゾチアゾール系加硫促進剤を組み合わせて
使用した実施例1〜5の配合のゴム組成物は、加硫速度
が早く、加工安定性に優れ、更に、耐熱性、発熱性に優
れていることがわかる。As described above, the rubber compositions of Examples 1 to 5 in which a compound selected from the group consisting of a thiuram compound and / or a dithiocarbamate compound and a benzothiazole vulcanization accelerator are used in combination, It can be seen that the vulcanization rate is fast, the processing stability is excellent, and the heat resistance and the heat generation are excellent.
【0027】一方、比較例1〜3から、1種の促進剤の
配合では、加硫速度、耐熱性、発熱性に大きく劣ること
がわかる。特に、比較例3では、試験中に試料のゴム成
分が分解して、発泡し、測定ができなかった。また、比
較例4から、チウラム化合物として本発明の範囲外のTM
TDを用い、更に、ベンゾチアゾール系加硫促進剤を配合
した場合には、加硫速度、加硫密度では、実施例同等の
数値が得られたが、加工安定性、耐熱性、発熱性に劣っ
ていることがわかる。特に、加工安定性は、スコーチを
起こす恐れの高いきわめて悪いレベルである。また、各
実施例の配合のゴム組成物をタイヤのベースゴムを用い
たときのタイヤ温度は、各比較例に比べ小さく、ベース
ゴムとして優れていることがわかる。On the other hand, from Comparative Examples 1 to 3, it can be seen that the compounding of one type of accelerator is significantly inferior in vulcanization rate, heat resistance and heat generation. In particular, in Comparative Example 3, the rubber component of the sample was decomposed during the test, foamed, and the measurement could not be performed. Also, from Comparative Example 4, TMs outside the scope of the present invention as thiuram compounds
In the case of using TD and further blending a benzothiazole vulcanization accelerator, the vulcanization rate and vulcanization density were equivalent to those in the examples, but the processing stability, heat resistance, and heat generation were reduced. It turns out that it is inferior. In particular, processing stability is at a very bad level where scorch is likely to occur. Also, the tire temperature when the rubber composition of each example was used as the base rubber of the tire was smaller than that of each comparative example, and it can be understood that the tire temperature was excellent.
【0028】実施例B(実施例6〜12、比較例5) 表2に、同様に、ゴム組成物の配合割合、そのゴム組成
物の物性、及びそのゴム組成物をベースゴムに使用した
タイヤの特性を示す。実施例Bは、チウラム化合物とし
てTEHTを用い、ジチオカルバメート化合物として、EH
−Sbを用いた。ベンゾチアゾール系加硫促進剤として
は、実施例Aと同様にTBBSを用いた。また、比較例5と
して、本発明の範囲外のチウラム化合物であるTMTDを用
いた例を示した。また、TBBS/TEHT及びTBBS/EH−S
bの比を変えた。また、ゴム成分としてSBR90 重量部、
NR10重量部を用い、加えて軟化剤を20重量部配合し
た。 Example B (Examples 6 to 12, Comparative Example 5) Similarly, Table 2 shows the compounding ratio of the rubber composition, the physical properties of the rubber composition, and a tire using the rubber composition as a base rubber. The characteristics of Example B uses TEHT as a thiuram compound and EH as a dithiocarbamate compound.
-Sb was used. TBBS was used as the benzothiazole vulcanization accelerator in the same manner as in Example A. As Comparative Example 5, an example using TMTD, which is a thiuram compound outside the scope of the present invention, was shown. In addition, TBBS / TEHT and TBBS / EH-S
The ratio of b was changed. Also, SBR90 parts by weight as a rubber component,
20 parts by weight of a softening agent was added in addition to 10 parts by weight of NR.
【0029】[0029]
【表2】 [Table 2]
【0030】上記の通り、TBBS/TEHTおよびTBBS/EH
−Sbの比が、1.5 を超過すると、加工安定性には優れ
るものの、加硫速度がやや遅くなり、また、耐熱性、発
熱性の向上もやや少な目であった。この比が、0.5 〜1.
5 の範囲にあるときには、加硫速度が早く、加工安定性
に優れ、耐熱性、発熱性等の良いゴムが得られることが
わかる。As described above, TBBS / TEHT and TBBS / EH
When the ratio of -Sb exceeds 1.5, the vulcanization rate was slightly slowed down and the heat resistance and exothermic properties were slightly improved, although the processing stability was excellent. This ratio is between 0.5 and 1.
When it is in the range of 5, it can be seen that a rubber having a high vulcanization rate, excellent processing stability, and good heat resistance and heat generation can be obtained.
【0031】一方、比較例5から、チウラム化合物とし
て本発明の範囲外のTMTDを用い、更に、ベンゾチアゾー
ル系加硫促進剤を配合した場合には、加硫速度、加硫密
度では、実施例同等の値が得られるが、加工安定性、耐
熱性、発熱性に劣っていることがわかる。特に、加工安
定性は、スコーチを起こす恐れが極めて高いレベルであ
る。更に、このゴム組成物を、タイヤのベースゴムに用
いたときのタイヤ温度は、比較例5に比べ小さく、ベー
スゴムとして優れていることがわかる。On the other hand, from Comparative Example 5, when TMTD out of the range of the present invention was used as a thiuram compound and a benzothiazole-based vulcanization accelerator was further blended, the vulcanization rate and vulcanization density were lower than those of Example 1. Although the same value is obtained, it can be seen that processing stability, heat resistance, and heat generation are inferior. In particular, processing stability is at a very high level of risk of scorching. Furthermore, the tire temperature when this rubber composition was used for a tire base rubber was smaller than that of Comparative Example 5, indicating that the tire was excellent as a base rubber.
【0032】[0032]
【発明の効果】以上説明したように、本発明によると、
特定のチウラム化合物及び/又は特定のジチオカルバメ
ート化合物を、ベンゾチアゾール系加硫促進剤と特定の
配合割合に組み合わせて使用することにより、加硫速
度、加工安定性、耐熱性、発熱性及び加硫密度を共に充
分満足することのできるゴム組成物、及びこれをベース
ゴムに用いた場合、比較的低温でのヒステリシスロスが
大きいため、高速操縦性等に優れたタイヤを具現化する
ことが可能となる。また、本発明にかかるタイヤは、例
えば200 km/h以上の高速走行においても、耐熱性、低
発熱性等に基づく高速耐久性を得ることができる。As described above, according to the present invention,
By using a specific thiuram compound and / or a specific dithiocarbamate compound in combination with a benzothiazole vulcanization accelerator in a specific compounding ratio, the vulcanization speed, processing stability, heat resistance, heat generation and vulcanization can be improved. A rubber composition that can sufficiently satisfy both densities, and when this is used for a base rubber, a hysteresis loss at a relatively low temperature is large, so that it is possible to realize a tire excellent in high-speed maneuverability and the like. Become. Further, the tire according to the present invention can achieve high-speed durability based on heat resistance, low heat generation, and the like even at a high speed running of, for example, 200 km / h or more.
【図1】本発明にかかる実施例のタイヤの部分断面図で
ある。FIG. 1 is a partial sectional view of a tire according to an embodiment of the present invention.
1 トレッドゴム 1a キャップゴム 1b ベースゴム 1 Tread rubber 1a Cap rubber 1b Base rubber
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭60−81234(JP,A) 特開 昭47−14247(JP,A) 特開 昭47−8290(JP,A) 特開 平3−210346(JP,A) 特開 昭59−12948(JP,A) 特開 平4−145144(JP,A) 特開 昭59−213745(JP,A) 特公 昭43−6286(JP,B1) 特表 平7−500616(JP,A) (58)調査した分野(Int.Cl.7,DB名) C08L 9/06 B60C 1/00 C08K 5/39 C08K 5/40 C08K 5/47 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-60-81234 (JP, A) JP-A-47-14247 (JP, A) JP-A-47-8290 (JP, A) 210346 (JP, A) JP-A-59-12948 (JP, A) JP-A-4-145144 (JP, A) JP-A-59-213745 (JP, A) JP-B-43-6286 (JP, B1) Special table Hei 7-500616 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) C08L 9/06 B60C 1/00 C08K 5/39 C08K 5/40 C08K 5/47
Claims (4)
含有するゴム成分100 重量部に対して、軟化剤20重量部
以下、 次式 【化1】 (式中、R1, R2, R3及びR4は、それぞれ独立に、炭素数
7〜12の直鎖または分岐鎖アルキル基を示す)で表され
るチウラム化合物、及び、次式 【化2】 (式中、R5及びR6は、それぞれ独立に、炭素数7〜12の
直鎖または分岐鎖アルキル基を示し、Mは2価以上の金
属であり、nはMの金属の原子価に等しい数である)で
表されるジチオカルバメート化合物よりなる群から選択
された化合物のうち少なくとも1つを0.5 〜2.0 重量
部、及びベンゾチアゾール系加硫促進剤0.5 〜2.0 重量
部を配合したことを特徴とするゴム組成物。1. A rubber component containing 50 parts by weight or more of styrene-butadiene rubber, 20 parts by weight or less of a softening agent with respect to 100 parts by weight of a rubber component. (Wherein R 1 , R 2 , R 3 and R 4 each independently represent a straight-chain or branched-chain alkyl group having 7 to 12 carbon atoms), and the following formula: 2] (Wherein, R 5 and R 6 each independently represent a straight-chain or branched-chain alkyl group having 7 to 12 carbon atoms, M is a divalent or higher-valent metal, and n is a valence of the metal of M. 0.5 to 2.0 parts by weight of at least one compound selected from the group consisting of dithiocarbamate compounds represented by the following formulae, and 0.5 to 2.0 parts by weight of a benzothiazole vulcanization accelerator. A rubber composition characterized by the following:
前記チウラム化合物及び前記ジチオカルバメート化合物
よりなる群から選択される化合物の比が0.5〜1.5 であ
ることを特徴とする請求項1記載のゴム組成物。2. The benzothiazole vulcanization accelerator,
The rubber composition according to claim 1, wherein a ratio of a compound selected from the group consisting of the thiuram compound and the dithiocarbamate compound is 0.5 to 1.5.
れ2−エチルヘキシル基であり、且つMがアンチモンで
あり、nが3であることを特徴とする請求項1または2
記載のゴム組成物。3. The method according to claim 2 , wherein R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are each a 2-ethylhexyl group, M is antimony, and n is 3. Item 1 or 2
The rubber composition as described in the above.
レッドゴムを有するタイヤにおいて、前記ベースゴム
に、前記請求項1〜3のうちの1つの項に記載のゴム組
成物を使用したことを特徴とするタイヤ。4. A tire having a tread rubber comprising a cap rubber and a base rubber, wherein the rubber composition according to any one of claims 1 to 3 is used for the base rubber. Tire to do.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04067218A JP3133816B2 (en) | 1992-03-25 | 1992-03-25 | Rubber composition and tire using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04067218A JP3133816B2 (en) | 1992-03-25 | 1992-03-25 | Rubber composition and tire using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05271476A JPH05271476A (en) | 1993-10-19 |
| JP3133816B2 true JP3133816B2 (en) | 2001-02-13 |
Family
ID=13338558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04067218A Expired - Lifetime JP3133816B2 (en) | 1992-03-25 | 1992-03-25 | Rubber composition and tire using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3133816B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030027970A (en) * | 2001-09-18 | 2003-04-08 | 금호산업 주식회사 | Tread compound for high speed racing car |
| JP2005220181A (en) * | 2004-02-04 | 2005-08-18 | Bridgestone Corp | Tire tread rubber composition and pneumatic tire using the same |
| KR101006193B1 (en) * | 2008-12-16 | 2011-01-12 | 한국타이어 주식회사 | Rubber composition for tire tread |
-
1992
- 1992-03-25 JP JP04067218A patent/JP3133816B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05271476A (en) | 1993-10-19 |
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