JP2001049032A - Tread rubber composition for tire - Google Patents
Tread rubber composition for tireInfo
- Publication number
- JP2001049032A JP2001049032A JP11224161A JP22416199A JP2001049032A JP 2001049032 A JP2001049032 A JP 2001049032A JP 11224161 A JP11224161 A JP 11224161A JP 22416199 A JP22416199 A JP 22416199A JP 2001049032 A JP2001049032 A JP 2001049032A
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- weight
- amine compound
- pts
- fatty acid
- 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
Links
- 229920001971 elastomer Polymers 0.000 title claims abstract description 67
- 239000005060 rubber Substances 0.000 title claims abstract description 67
- 239000000203 mixture Substances 0.000 title claims abstract description 42
- -1 amine compound Chemical class 0.000 claims abstract description 21
- 229920001194 natural rubber Polymers 0.000 claims abstract description 18
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 16
- 229930195729 fatty acid Natural products 0.000 claims abstract description 16
- 239000000194 fatty acid Substances 0.000 claims abstract description 16
- 150000004665 fatty acids Chemical class 0.000 claims abstract description 15
- 239000006229 carbon black Substances 0.000 claims abstract description 13
- 229910021385 hard carbon Inorganic materials 0.000 claims abstract description 10
- 244000043261 Hevea brasiliensis Species 0.000 claims abstract description 9
- 229920003052 natural elastomer Polymers 0.000 claims abstract description 9
- 235000021355 Stearic acid Nutrition 0.000 claims abstract description 7
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 7
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000008117 stearic acid Substances 0.000 claims abstract description 7
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 abstract description 4
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 abstract description 2
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 abstract description 2
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 abstract description 2
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 abstract description 2
- 239000005642 Oleic acid Substances 0.000 abstract description 2
- 125000003158 alcohol group Chemical group 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 abstract description 2
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 abstract description 2
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 abstract description 2
- 125000001931 aliphatic group Chemical group 0.000 abstract 1
- 150000001735 carboxylic acids Chemical class 0.000 abstract 1
- 238000004898 kneading Methods 0.000 description 11
- 238000005299 abrasion Methods 0.000 description 9
- 239000006057 Non-nutritive feed additive Substances 0.000 description 8
- 239000002245 particle Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000004636 vulcanized rubber Substances 0.000 description 6
- 230000001771 impaired effect Effects 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 238000013329 compounding Methods 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 229920003244 diene elastomer Polymers 0.000 description 2
- IPCSVZSSVZVIGE-UHFFFAOYSA-N hexadecanoic acid Chemical compound CCCCCCCCCCCCCCCC(O)=O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 description 2
- 150000005846 sugar alcohols Polymers 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- OYHQOLUKZRVURQ-HZJYTTRNSA-N Linoleic acid Chemical compound CCCCC\C=C/C\C=C/CCCCCCCC(O)=O OYHQOLUKZRVURQ-HZJYTTRNSA-N 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 235000021314 Palmitic acid Nutrition 0.000 description 1
- 150000007933 aliphatic carboxylic acids Chemical class 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 235000020778 linoleic acid Nutrition 0.000 description 1
- OYHQOLUKZRVURQ-IXWMQOLASA-N linoleic acid Natural products CCCCC\C=C/C\C=C\CCCCCCCC(O)=O OYHQOLUKZRVURQ-IXWMQOLASA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- WQEPLUUGTLDZJY-UHFFFAOYSA-N n-Pentadecanoic acid Natural products CCCCCCCCCCCCCCC(O)=O WQEPLUUGTLDZJY-UHFFFAOYSA-N 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920001195 polyisoprene Polymers 0.000 description 1
- 150000003141 primary amines Chemical class 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- WBHHMMIMDMUBKC-XLNAKTSKSA-N ricinelaidic acid Chemical compound CCCCCC[C@@H](O)C\C=C\CCCCCCCC(O)=O WBHHMMIMDMUBKC-XLNAKTSKSA-N 0.000 description 1
- 229960003656 ricinoleic acid Drugs 0.000 description 1
- FEUQNCSVHBHROZ-UHFFFAOYSA-N ricinoleic acid Natural products CCCCCCC(O[Si](C)(C)C)CC=CCCCCCCCC(=O)OC FEUQNCSVHBHROZ-UHFFFAOYSA-N 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 150000003335 secondary amines Chemical class 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 1
Landscapes
- Tires In General (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、タイヤ用トレッド
ゴム組成物、特に加工性に優れかつ耐摩耗性に優れた特
にトラック、バス用タイヤに適したタイヤ用トレッドゴ
ム組成物に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tread rubber composition for a tire, and more particularly to a tread rubber composition for a tire suitable for truck and bus tires which has excellent workability and abrasion resistance.
【０００２】[0002]
【従来の技術】従来、トラック、バス用タイヤ等の高荷
重で、かつ高速条件下で使用されるトレッド用ゴム組成
物は耐摩耗性が要求されることから、天然ゴムあるいは
ポリイソプレンゴムを主体とするゴム成分が用いられて
いる。そして加硫ゴムの補強効果を高め耐摩耗性を一層
改善するため、カーボンブラックの種類は粒子径の小さ
い、いわゆるハード系カーボンが配合されている。しか
し係るゴム組成物は未加硫ゴムの粘度が高く、ゴムの加
工性を損う問題点がある。2. Description of the Related Art Conventionally, rubber compositions for treads used under high load and high speed conditions, such as tires for trucks and buses, are required to have abrasion resistance. Therefore, natural rubber or polyisoprene rubber is mainly used. Is used. In order to enhance the reinforcing effect of the vulcanized rubber and further improve the abrasion resistance, the type of carbon black is a so-called hard carbon having a small particle diameter. However, such a rubber composition has a problem that the viscosity of the unvulcanized rubber is high and the processability of the rubber is impaired.
【０００３】従来から未加硫ゴムの粘度を調整して、加
工性を改善する試みは色々されている。たとえば、ジエ
ン系ゴムに可塑剤を配合する方法があるが、加工性は改
善されるものの、加硫ゴム物性の低下は免れない。Conventionally, various attempts have been made to improve the processability by adjusting the viscosity of unvulcanized rubber. For example, there is a method of blending a plasticizer with a diene rubber, but the processability is improved, but the physical properties of the vulcanized rubber are inevitably reduced.
【０００４】さらには、低分子量の液状ポリイソプレン
を添加する技術（特開昭５４−７４５０）、多価アルコ
ール不飽和脂肪酸エステルを添加する技術（特開昭５７
−１００１５０）、多価アルコールと高級脂肪酸、低級
脂肪酸およびジカルボン酸とを構成成分とするエステル
化合物を配合する技術（特開昭６１−８１４４４）、ま
た高分子量脂肪酸エステルを所定量、溶液重合ＳＢＲに
配合する技術（特開平６−２４８１１３）等がある。Further, a technique for adding a low molecular weight liquid polyisoprene (JP-A-54-7450) and a technique for adding a polyhydric alcohol unsaturated fatty acid ester (JP-A-57-1979)
-100150), a technique of blending an ester compound comprising a polyhydric alcohol and a higher fatty acid, a lower fatty acid and a dicarboxylic acid (JP-A-61-81444). There is a technique of blending (JP-A-6-248113).
【０００５】しかしながらこれらの技術はトラック、バ
ス用タイヤ等の高荷重、高速の厳しい条件下で使用され
るトレッドゴム組成物として要求される耐摩耗性は十分
なものではない。However, these techniques do not have sufficient abrasion resistance required for tread rubber compositions used under severe conditions of high load and high speed such as tires for trucks and buses.
【０００６】[0006]
【発明が解決しようとする課題】上記実情に鑑み発明者
は、耐摩耗性の改善と未加硫ゴムの加工性のバランスを
図るべく、ジエン系ゴムの種類およびカーボンブラック
の配合量および種類を選び、これに加工助剤の影響の研
究を重ねた結果、特定の脂肪酸とアミン化合物の混合物
が有効であることを発見した。本発明は係る知見に基づ
くものであり、未加硫ゴムの粘度を下げ加工性を改善す
ると同時に、耐摩耗性を改善したタイヤ用トレッドゴム
組成物を提供することを目的とする。SUMMARY OF THE INVENTION In view of the above circumstances, the inventor of the present invention has determined the type of diene rubber and the amount and type of carbon black in order to improve the wear resistance and balance the workability of unvulcanized rubber. As a result of studying the effects of processing aids on the selection, we found that a mixture of specific fatty acids and amine compounds was effective. The present invention is based on such findings, and has an object to provide a tread rubber composition for a tire in which the viscosity of an unvulcanized rubber is reduced, the processability is improved, and the abrasion resistance is improved.
【０００７】[0007]
【課題を解決するための手段】本発明は、天然ゴムおよ
び／またはポリイソプレンゴムを５０重量％以上含むゴ
ム成分１００重量部に対して、ハード系カーボンブラッ
クを４０〜７０重量部、脂肪酸とアミン化合物の混合物
を０．５〜１０重量部含むことを特徴とするタイヤ用ト
レッドゴム組成物である。According to the present invention, there is provided a rubber composition containing 50 to 50% by weight of natural rubber and / or polyisoprene rubber, 40 to 70 parts by weight of hard carbon black, fatty acid and amine. A tread rubber composition for a tire, comprising 0.5 to 10 parts by weight of a mixture of compounds.
【０００８】そして本発明のゴム組成物は好ましくはス
テアリン酸をゴム成分１００重量部に対して１〜１０重
量部配合されている。The rubber composition of the present invention preferably contains 1 to 10 parts by weight of stearic acid per 100 parts by weight of the rubber component.
【０００９】本発明のゴム組成物を構成するゴム成分
は、天然ゴムおよび／またはポリイソプレンゴムを５０
重量％以上含むことが必要である。ゴム組成物の耐摩耗
性および耐発熱性は、ゴムの種類によって大きく依存し
ており、天然ゴムおよびポリイソプレンゴムがこれらの
両特性に優れている。The rubber component constituting the rubber composition of the present invention comprises natural rubber and / or polyisoprene rubber.
It must be contained in an amount of at least% by weight. The abrasion resistance and heat resistance of a rubber composition largely depend on the type of rubber, and natural rubber and polyisoprene rubber are excellent in both of these properties.
【００１０】タイヤ用トレッドゴム組成物は耐摩耗性、
耐発熱性の他、ウエットグリップ性、転動抵抗および耐
チッピング性等の諸特性が総合的にバランスが取れるよ
う配合設計をする必要がある。そのため、その他のゴム
成分としてその要求特性に応じて乳化重合スチレン−ブ
タジエン共重合ゴム、溶液重合スチレン−ブタジエン共
重合ゴム（スチレン含量、１，２結合量を変量したも
の）、ポリブタジエンゴム、ポリクロロプレンゴム、イ
ソプレン−イソブチレン共重合ゴム、アクリロニトリル
−ブタジエン共重合ゴム、およびエチレン−プロピレン
共重合ゴム等を単独またはこれらの２種類以上を混合し
てもよい。The tread rubber composition for a tire has abrasion resistance,
In addition to heat resistance, it is necessary to design the composition so that various properties such as wet grip properties, rolling resistance and chipping resistance can be comprehensively balanced. Therefore, as other rubber components, emulsion polymerized styrene-butadiene copolymer rubber, solution polymerized styrene-butadiene copolymer rubber (styrene content, 1,2 bond amount varied), polybutadiene rubber, polychloroprene Rubber, isoprene-isobutylene copolymer rubber, acrylonitrile-butadiene copolymer rubber, ethylene-propylene copolymer rubber, or the like may be used alone or as a mixture of two or more thereof.
【００１１】なお、天然ゴムおよび／またはポリイソプ
レンゴムの配合量は、ゴム成分に対して５０重量％以上
である。５０重量％未満の場合、耐摩耗性および耐発熱
性を損うことになる。The amount of the natural rubber and / or polyisoprene rubber is at least 50% by weight based on the rubber component. If the amount is less than 50% by weight, wear resistance and heat resistance will be impaired.
【００１２】次に本発明のゴム組成物はハード系カーボ
ンブラックが、ゴム成分中４０〜７０重量部配合され
る。ここでハード系カーボンブラックとは、Ｎ３００
（ＨＡＦ）より粒子径の小さいもの、すなわち平均粒子
径が３０ｎｍ以下のものをいう。たとえばＮ２９９、Ｎ
２３９、Ｎ２４２、Ｎ２３４、Ｎ２３１、Ｎ２２０、Ｎ
２１２、Ｎ１２５、Ｎ１２１、Ｎ１１５、およびＮ１１
０等である。Next, the rubber composition of the present invention contains 40 to 70 parts by weight of a hard carbon black in the rubber component. Here, the hard carbon black is N300
A particle having a smaller particle diameter than (HAF), that is, a particle having an average particle diameter of 30 nm or less. For example, N299, N
239, N242, N234, N231, N220, N
212, N125, N121, N115, and N11
It is 0 and so on.
【００１３】ハード系カーボンブラックを用いることに
より、ゴム組成物の補強効果を高め耐摩耗性は改善され
る。そしてハード系カーボンブラックはゴム成分１００
重量部に対して４０〜７０重量部の範囲で配合される。
４０重量部未満では補強効果がなく、耐摩耗性等の物性
が十分でなく、７０重量部を超えると未加硫ゴムの粘度
が高くなりすぎて加工性が著しく損われる。By using a hard carbon black, the reinforcing effect of the rubber composition is enhanced and the wear resistance is improved. And hard carbon black is rubber component 100
It is blended in the range of 40 to 70 parts by weight with respect to parts by weight.
If the amount is less than 40 parts by weight, there is no reinforcing effect, and the physical properties such as abrasion resistance are not sufficient. If the amount exceeds 70 parts by weight, the viscosity of the unvulcanized rubber becomes too high and the workability is remarkably impaired.
【００１４】次に本発明のゴム組成物に使用される加工
助剤は、脂肪酸とアミン化合物の混合物である。ここで
脂肪酸はオレイン酸、ステアリン酸、リシノール酸、リ
ノール酸、パルミチン酸等の高級脂肪族カルボン酸が好
適である。Next, the processing aid used in the rubber composition of the present invention is a mixture of a fatty acid and an amine compound. Here, the fatty acid is preferably a higher aliphatic carboxylic acid such as oleic acid, stearic acid, ricinoleic acid, linoleic acid and palmitic acid.
【００１５】一方、アミン化合物としては脂肪族アミ
ン、複素環アミンで一級アミン、二級アミン、三級アミ
ンが使用できるが、特にエタノールアミンあるいはジエ
タノールアミンのようにアルコール基を有するアミン化
合物が好適である。On the other hand, as the amine compound, aliphatic amines and heterocyclic amines such as primary amines, secondary amines and tertiary amines can be used. Particularly, amine compounds having an alcohol group such as ethanolamine or diethanolamine are preferred. .
【００１６】なお脂肪酸とアミン化合物の割合は重量比
で１／９〜９／１の範囲、好ましくは３／７〜７／３の
範囲である。The weight ratio of the fatty acid to the amine compound is in the range of 1/9 to 9/1, preferably in the range of 3/7 to 7/3.
【００１７】上記混合物を加工助剤に用いることにより
ゴム組成物の粘度を低下させ、カーボンブラックのゴム
組成物の内部への分散を向上させるため、加硫ゴム物性
が一層改善される。ここで本発明の前記脂肪酸とアミン
化合物の混合物よりなる加工助剤は、ゴム成分１００重
量部に対して０．５〜１０重量部、好ましくは１〜５重
量部配合される。０．５重量部未満ではゴム組成物の粘
度低下は期待できず、一方１０重量部を超えると耐スコ
ーチ性を損うことになる。By using the above mixture as a processing aid, the viscosity of the rubber composition is reduced, and the dispersion of carbon black in the rubber composition is improved, so that the physical properties of the vulcanized rubber are further improved. Here, the processing aid comprising the mixture of the fatty acid and the amine compound of the present invention is compounded in an amount of 0.5 to 10 parts by weight, preferably 1 to 5 parts by weight, based on 100 parts by weight of the rubber component. If the amount is less than 0.5 part by weight, a decrease in the viscosity of the rubber composition cannot be expected, while if it exceeds 10 parts by weight, the scorch resistance is impaired.
【００１８】なお本発明では従来の加工助剤、たとえば
高分子量脂肪酸エステル、低分子量液状ゴム等を併用す
ることができる。In the present invention, conventional processing aids such as high molecular weight fatty acid esters and low molecular weight liquid rubber can be used in combination.
【００１９】次に本発明ではステアリン酸をゴム成分１
００重量部に対して、１〜１０重量部配合することによ
り、粘度の低下とともに耐発熱性が改善される。ステア
リン酸の配合により、その界面活性的な作用によって、
前記加工助剤とともにカーボン粒子に吸着し、カーボン
粒子の凝集塊の解裂による分散性を向上させるととも
に、加硫促進助剤としても作用する。Next, in the present invention, stearic acid is replaced with rubber component 1
By mixing 1 to 10 parts by weight with respect to 00 parts by weight, the heat resistance is improved as well as the viscosity is reduced. By stearic acid combination, due to its surface active action,
It adsorbs to the carbon particles together with the processing aid, improves the dispersibility of the aggregates of the carbon particles due to the cleavage thereof, and also acts as a vulcanization promoting aid.
【００２０】本発明におけるゴム組成物には加工助剤の
他、さらにタイヤ用ゴム組成物として汎用されている配
合剤として、たとえば加硫剤、加硫促進剤、補強剤、軟
化剤、充填剤、老化防止剤等を適宜添加して用いること
ができる。In the rubber composition of the present invention, besides the processing aid, other compounding agents commonly used as rubber compositions for tires include, for example, vulcanizing agents, vulcanization accelerators, reinforcing agents, softeners, and fillers. , An antioxidant and the like can be appropriately added and used.
【００２１】[0021]
【実施例】表１に示す配合成分の配合割合をゴムの基本
配合とし、表２、表３に示す各種配合を用いてゴム組成
物を作製し、下記試験法により評価を行なった。その結
果を表２、表３に示す。EXAMPLES A rubber composition was prepared by using the compounding ratios of the components shown in Table 1 as the basic compounding ratios of rubber, and various rubber compositions shown in Tables 2 and 3 were prepared and evaluated by the following test methods. The results are shown in Tables 2 and 3.
【００２２】[0022]
【表１】 [Table 1]
【００２３】[0023]
【表２】 [Table 2]
【００２４】[0024]
【表３】 [Table 3]
【００２５】（１） 練り回数 １７５リットルバンバリーミキサ（回転数４０ｒｐｍ）
にて評価した。(1) Number of kneading 175 liter Banbury mixer (rotational speed: 40 rpm)
Was evaluated.
【００２６】４回練りは、親練り、再練、再練りおよび
仕上げ練りを意味する。３回練りは、親練り、再練り、
および仕上げ練りを意味する。[0026] Four-time kneading means familiar kneading, re-kneading, re-kneading and finishing kneading. The kneading three times, the kneading, re-kneading,
And finishing kneading.
【００２７】練り回数が少ないほど加工性が優れている
ことを示す。 （２） ムーニー粘度（ＭＬ1+4１００℃） ＪＩＳ Ｋ６３００に基づいて未加硫ゴムを測定した。
実施例１を１００として指数表示した。数値が小さいほ
ど加工性が良好であることを示す。The smaller the number of kneadings, the better the workability. (2) Mooney viscosity (ML 1 + 4 100 ° C.) The unvulcanized rubber was measured based on JIS K6300.
The index was indicated as an index with the value of Example 1 being 100. The smaller the value, the better the workability.
【００２８】（３） スコーチタイム ＪＩＳ Ｋ６３００に基づいて行なった。(3) Scorch time This was performed based on JIS K6300.
【００２９】スコーチタイムを実施例１を１００として
指数表示をした。数値が大きいほど良好である。The scorch time was expressed as an index with the value of Example 1 taken as 100. The higher the value, the better.
【００３０】（４） 耐摩耗性 上島製作所製ランボーン型摩耗試験機を用いて、スリッ
プ比３０％のときの摩耗量を測定した。実施例１を１０
０として指数表示をした。数値が大きいほど良好であ
る。(4) Wear Resistance Using a Lambourn-type abrasion tester manufactured by Ueshima Seisakusho, the amount of wear at a slip ratio of 30% was measured. Example 1 to 10
The index was displayed as 0. The higher the value, the better.
【００３１】（５） 耐発熱性 グッドリッチフレクソ型メーターを用いて、４０ｒｐｍ
のときの発熱性を評価した。発熱性を実施例１を１００
として逆指数化した。(5) Heat generation resistance 40 rpm using a Goodrich Flexo-type meter
The exothermicity at the time of was evaluated. Exothermicity was 100 in Example 1.
As an inverse index.
【００３２】数値が大きいほど良好である。表２および
表３の評価結果から、脂肪酸およびアミン化合物の混合
物を用いた本発明の組成物は、カーボンブラックの同じ
配合量のものに比べ、ムーニー粘度がかなり低くなって
おり、加工性が改善され、また加硫ゴムの耐摩耗性およ
び耐発熱性も向上していることがわかる。The higher the numerical value, the better. From the evaluation results in Tables 2 and 3, the composition of the present invention using a mixture of a fatty acid and an amine compound has significantly lower Mooney viscosity and improved processability than that of the same amount of carbon black. It can be seen that the vulcanized rubber also has improved wear resistance and heat resistance.
【００３３】今回開示された実施の形態はすべての点で
例示であって制限的なものではないと考えられるべきで
ある。本発明の範囲は上記した説明ではなくて特許請求
の範囲によって示され、特許請求の範囲と均等の意味お
よび範囲内でのすべての変更が含まれることが意図され
る。The embodiment disclosed this time is to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.
【００３４】[0034]
【発明の効果】本発明は天然ゴムおよび／またはポリイ
ソプレンゴムを主体とし、かつハード系カーボンブラッ
クを配合したゴム組成物において、脂肪酸とアミン化合
物の混合物を加工助剤として用いることにより、未加硫
ゴムの粘度を下げ、加工性を改善するとともに、加硫ゴ
ムの耐摩耗性を向上することができる。According to the present invention, a rubber composition mainly composed of natural rubber and / or polyisoprene rubber and blended with hard carbon black is used by using a mixture of a fatty acid and an amine compound as a processing aid. The viscosity of the vulcanized rubber can be reduced, the processability can be improved, and the wear resistance of the vulcanized rubber can be improved.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｃ０８Ｌ 9/00 Ｃ０８Ｌ 9/00 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) C08L 9/00 C08L 9/00
Claims (2)
ゴムを５０重量％以上含むゴム成分１００重量部に対し
て、ハード系カーボンブラックを４０〜７０重量部、脂
肪酸とアミン化合物の混合物を０．５〜１０重量部含む
ことを特徴とするタイヤ用トレッドゴム組成物。1. A rubber composition containing 50% by weight or more of natural rubber and / or polyisoprene rubber, 40 to 70 parts by weight of a hard carbon black, and 0.5 to 50 parts by weight of a mixture of a fatty acid and an amine compound. A tread rubber composition for a tire, comprising 10 parts by weight.
対して１〜１０重量部配合されている請求項１記載のタ
イヤ用トレッドゴム組成物。2. The tire tread rubber composition according to claim 1, wherein 1 to 10 parts by weight of stearic acid is blended with respect to 100 parts by weight of the rubber component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11224161A JP2001049032A (en) | 1999-08-06 | 1999-08-06 | Tread rubber composition for tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11224161A JP2001049032A (en) | 1999-08-06 | 1999-08-06 | Tread rubber composition for tire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001049032A true JP2001049032A (en) | 2001-02-20 |
Family
ID=16809497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11224161A Pending JP2001049032A (en) | 1999-08-06 | 1999-08-06 | Tread rubber composition for tire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001049032A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10179479B2 (en) | 2015-05-19 | 2019-01-15 | Bridgestone Americas Tire Operations, Llc | Plant oil-containing rubber compositions, tread thereof and race tires containing the tread |
-
1999
- 1999-08-06 JP JP11224161A patent/JP2001049032A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10179479B2 (en) | 2015-05-19 | 2019-01-15 | Bridgestone Americas Tire Operations, Llc | Plant oil-containing rubber compositions, tread thereof and race tires containing the tread |
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