JP4312252B2 - Rubber composition for tire and pneumatic tire using the same - Google Patents
Rubber composition for tire and pneumatic tire using the same Download PDFInfo
- Publication number
- JP4312252B2 JP4312252B2 JP2008195415A JP2008195415A JP4312252B2 JP 4312252 B2 JP4312252 B2 JP 4312252B2 JP 2008195415 A JP2008195415 A JP 2008195415A JP 2008195415 A JP2008195415 A JP 2008195415A JP 4312252 B2 JP4312252 B2 JP 4312252B2
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- tire
- rubber composition
- isoprene
- butadiene copolymer
- 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.)
- Active
Links
- 229920001971 elastomer Polymers 0.000 title claims description 62
- 239000005060 rubber Substances 0.000 title claims description 61
- 239000000203 mixture Substances 0.000 title claims description 26
- 239000000945 filler Substances 0.000 claims description 13
- 229920001577 copolymer Polymers 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 229920003244 diene elastomer Polymers 0.000 claims description 8
- VGPBSDQELAMFAH-UHFFFAOYSA-N 4-(4-azidosulfonylphenoxy)-n-diazobenzenesulfonamide Chemical compound C1=CC(S(=O)(=O)N=[N+]=[N-])=CC=C1OC1=CC=C(S(=O)(=O)N=[N+]=[N-])C=C1 VGPBSDQELAMFAH-UHFFFAOYSA-N 0.000 claims description 6
- 244000043261 Hevea brasiliensis Species 0.000 claims description 6
- 229920003049 isoprene rubber Polymers 0.000 claims description 6
- 229920003052 natural elastomer Polymers 0.000 claims description 6
- 229920001194 natural rubber Polymers 0.000 claims description 6
- 229920002857 polybutadiene Polymers 0.000 claims description 6
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 6
- 239000005062 Polybutadiene Substances 0.000 claims description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 5
- 229910052717 sulfur Inorganic materials 0.000 claims description 5
- 239000011593 sulfur Substances 0.000 claims description 5
- 239000002174 Styrene-butadiene Substances 0.000 claims description 4
- 239000006229 carbon black Substances 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 238000004073 vulcanization Methods 0.000 description 13
- 239000003795 chemical substances by application Substances 0.000 description 10
- 238000013329 compounding Methods 0.000 description 10
- 239000003607 modifier Substances 0.000 description 9
- 238000005096 rolling process Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 230000001965 increasing effect Effects 0.000 description 4
- 230000003993 interaction Effects 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 229910001873 dinitrogen Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- -1 azide compound Chemical class 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 239000003431 cross linking reagent Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- HQNSWBRZIOYGAW-UHFFFAOYSA-N 2-chloro-n,n-dimethylpyridin-4-amine Chemical compound CN(C)C1=CC=NC(Cl)=C1 HQNSWBRZIOYGAW-UHFFFAOYSA-N 0.000 description 1
- 241001441571 Hiodontidae Species 0.000 description 1
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Natural products CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 1
- 239000004594 Masterbatch (MB) Substances 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- IVRMZWNICZWHMI-UHFFFAOYSA-N azide group Chemical group [N-]=[N+]=[N-] IVRMZWNICZWHMI-UHFFFAOYSA-N 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 150000001993 dienes Chemical class 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen(.) Chemical compound [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000011115 styrene butadiene Substances 0.000 description 1
- 238000005987 sulfurization reaction Methods 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
Landscapes
- Tires In General (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
本発明は、タイヤ用ゴム組成物に関し、更に詳細には、ゴム−フィラー間の相互作用を高め、低発熱性で、加硫速度を上げることができるタイヤ用ゴム組成物及びそれを用いた空気入りタイヤに関する。 TECHNICAL FIELD The present invention relates to a rubber composition for tires, and more specifically, a rubber composition for tires that can increase the interaction between rubber and filler, has low heat build-up, and can increase the vulcanization speed, and air using the same. Related to tires .
近年、タイヤに求められる性能を様々な方法で高次元化している。その一例として、低燃費性の市場ニーズからタイヤの転がり抵抗低減の要求が強く求められている。このような転がり抵抗の低減の手法として、ゴム分子の末端を種々の官能基で変性し、ゴム中のフィラーの分散性を向上させ、低燃費性を向上させる技術がある。しかし、ゴム分子の末端を変性させ、その効果を最大限得るには、末端基の多くを変性させることが必要であり、その結果ゴムの分子量は低下してしまう。低分子量の末端変性ゴムを使用すると、特にフィラーとしてシリカを用いた場合、十分な反応、フィラーの分散のため長時間の混合を必要とするが、この場合、ゴム分子がどんどん切れてしまい粘度低下にもつながるという問題がある。 In recent years, the performance required for tires has been increased by various methods. As an example, there is a strong demand for reducing tire rolling resistance due to market needs for low fuel consumption. As a technique for reducing such rolling resistance, there is a technique for improving the fuel efficiency by modifying the end of the rubber molecule with various functional groups to improve the dispersibility of the filler in the rubber. However, in order to modify the ends of the rubber molecules and obtain the maximum effect, it is necessary to modify many of the end groups, resulting in a decrease in the molecular weight of the rubber. When using a low molecular weight end-modified rubber, especially when silica is used as the filler, long reaction time is required for sufficient reaction and dispersion of the filler, but in this case, the rubber molecules are rapidly cut and the viscosity is lowered. There is also a problem that leads to.
これらの問題を解決するためには、混合中にゴムの主鎖を変性させることができれば、分子量低下を引き起こさずにゴム−フィラー間の相互作用を高めることができ、求められるタイヤ性能を満足し得るゴム組成物を得ることができることになる。そこで、本発明では、かかる主鎖変性剤として特定の配合剤（４,４´−オキシビス(ベンゼンスルホニルアジド)）を使用することにより、ゴム−フィラー間の相互作用を高めて低燃費性に優れたタイヤ用ゴム組成物を得ることに成功したものである。 In order to solve these problems, if the main chain of the rubber can be modified during mixing, the interaction between the rubber and the filler can be increased without causing a decrease in molecular weight, and the required tire performance is satisfied. The rubber composition to be obtained can be obtained. Therefore, in the present invention, by using a specific compounding agent (4,4′-oxybis (benzenesulfonyl azide)) as the main chain modifier, the interaction between the rubber and the filler is enhanced and the fuel efficiency is excellent. It has succeeded in obtaining a tire rubber composition.
従来、当該４,４´−オキシビス(ベンゼンスルホニルアジド)を、硬化剤として用いて、耐オゾン性等に優れたエラストマー組成物を得ること（例えば特許文献１及び２参照）、また、これを発泡剤兼架橋剤として用いて、接触体に曇りや汚染を生じさせない金型成形用のスポンジゴム組成物を得ること（例えば特許文献３参照）などが提案されている。しかしながら、本願発明のように、これをゴムの主鎖変性剤として用いることにより、低燃費性に優れたタイヤ用ゴム組成物が得られることを提示する公知文献はない。 Conventionally, by using the 4,4′-oxybis (benzenesulfonyl azide) as a curing agent, an elastomer composition excellent in ozone resistance and the like is obtained (for example, see Patent Documents 1 and 2), and this is foamed. It has been proposed to obtain a sponge rubber composition for molding a mold that does not cause fogging or contamination of the contact body by using it as an agent / crosslinking agent (see, for example, Patent Document 3). However, there is no known document that suggests that a rubber composition for tires excellent in fuel efficiency can be obtained by using this as a main chain modifier of rubber as in the present invention.
本発明では、特定の主鎖変性剤を用いて、混合中にゴムの主鎖と反応させることにより、ゴム−フィラー間の相互作用を高め、低発熱性で、かつ加硫速度を上昇させることができるタイヤ用ゴム組成物及びそれを用いた空気入りタイヤを提供することを目的とする。 In the present invention, a specific main chain modifier is used to react with the main chain of the rubber during mixing, thereby enhancing the interaction between the rubber and the filler, low exothermicity, and increasing the vulcanization rate. An object of the present invention is to provide a rubber composition for a tire and a pneumatic tire using the same.
本発明によれば、（Ａ）天然ゴム（ＮＲ）、イソプレンゴム（ＩＲ）、ブタジエンゴム（ＢＲ）、スチレン−ブタジエン共重合体ゴム（ＳＢＲ）、アクリロニトリル−ブタジエン共重合体ゴム（ＮＢＲ）、スチレン−イソプレン共重合体ゴム、スチレン−イソプレン−ブタジエン共重合体ゴム、イソプレン−ブタジエン共重合体ゴムから選ばれる少なくとも１種の硫黄加硫可能なジエン系ゴム１００重量部、（Ｂ）４,４´−オキシビス(ベンゼンスルホニルアジド)０．１〜１重量部及び（Ｃ）加硫系配合剤並びに（Ｄ）フィラーとしてカーボンブラック及び／又はシリカ
を含んでなり、成分（Ａ），（Ｂ）及び（Ｄ）を成分（Ｃ）の添加前の第一次混合時に混合してなるタイヤ用ゴム組成物並びにそれを用いた空気入りタイヤが提供される。
According to the present invention, (A) natural rubber (NR), isoprene rubber (IR), butadiene rubber (BR), styrene-butadiene copolymer rubber (SBR), acrylonitrile-butadiene copolymer rubber (NBR), styrene -100 parts by weight of at least one sulfur vulcanizable diene rubber selected from isoprene copolymer rubber, styrene-isoprene-butadiene copolymer rubber, isoprene-butadiene copolymer rubber , (B) 4, 4 ' -0.1 to 1 part by weight of oxybis (benzenesulfonyl azide) and (C) a vulcanizing compound and (D) carbon black and / or silica as a filler , and components (A) , ( B) and (D) a component (primary mixed tire rubber composition obtained by mixing at and pneumatic tire provided with which using the same prior to the addition of C) That.
本発明者らは、加硫系配合剤（Ｃ）の添加前の第一次混合時に、ジエン系ゴム（Ａ）中に４,４´−オキシビス(ベンゼンスルホニルアジド)（ＯＢＳＡ）（Ｂ）を、主鎖変性剤として、配合し、１６０〜１７０℃で加熱混練すると、当該ＯＢＳＡがジエン系ゴム（Ａ）の主鎖と反応してゴム分子の動きを拘束するため、破断硬度を損なうことなく、低発熱性となり、かつ加硫速度を上昇させることができることを見出したものである。 The present inventors added 4,4′-oxybis (benzenesulfonyl azide) (OBSA) (B) in the diene rubber (A) during the primary mixing before the addition of the vulcanizing compounding agent (C). When blended as a main chain modifier and heated and kneaded at 160 to 170 ° C., the OBSA reacts with the main chain of the diene rubber (A) to restrain the movement of rubber molecules, so that the breaking hardness is not impaired. The present inventors have found that it becomes low exothermic and can increase the vulcanization rate.
本発明のタイヤ用ゴム組成物に用いられる硫黄加硫可能なジエン系ゴム（Ａ）としては、天然ゴム（ＮＲ）、イソプレンゴム（ＩＲ）、各種ブタジエンゴム（ＢＲ）、各種スチレン−ブタジエン共重合体ゴム（ＳＢＲ）、アクリロニトリル−ブタジエン共重合体ゴム（ＮＢＲ）、スチレン−イソプレン共重合体ゴム、スチレン−イソプレン−ブタジエン共重合体ゴム、イソプレン−ブタジエン共重合体ゴムを単独で、あるいは二種以上のブレンドゴムとして使用する。 The sulfur vulcanizable diene-based rubber used in tire rubber composition of the present invention (A), natural rubber (NR), isoprene rubber (IR), various butadiene rubbers (BR), various types of styrene - butadiene copolymerization Combined rubber (SBR), acrylonitrile-butadiene copolymer rubber (NBR), styrene-isoprene copolymer rubber, styrene-isoprene-butadiene copolymer rubber, isoprene-butadiene copolymer rubber alone or in combination Used as a blend rubber.
本発明のタイヤ用ゴム組成物に、主鎖変性剤として、配合する４,４´−オキシビス(ベンゼンスルホニルアジド)（ＯＢＳＡ）は、下式(Ｉ)に示されるアジド化合物であり、これとジエン系ゴムとの混合加熱時の熱によって、以下に示す反応機構により、その両末端のアジド基から窒素ガス（Ｎ2）が発生し、残渣の窒素ラジカルとジエン系ゴムの主鎖とが反応し、ジエン系ゴムの一部と架橋することによって、本発明の効果を発揮するものである。なお、ＯＢＳＡは公知の化合物であり、市販品を用いることができる。 4,4′-oxybis (benzenesulfonyl azide) (OBSA) to be blended as a main chain modifier in the tire rubber composition of the present invention is an azide compound represented by the following formula (I), Due to the heat during mixing and heating with the rubber, nitrogen gas (N 2 ) is generated from the azide groups at both ends by the reaction mechanism shown below, and the residual nitrogen radical reacts with the main chain of the diene rubber. The effect of the present invention is exhibited by crosslinking with a part of the diene rubber. OBSA is a known compound, and a commercially available product can be used.
本発明の配合剤である前記４,４´−オキシビス(ベンゼンスルホニルアジド)（ＯＢＳＡ）主鎖変性剤は、ジエン系ゴム１００重量部に対して、０．１〜１重量部、好ましくは０．２〜０．６重量部の配合量で使用される。この配合量が少な過ぎると所期の効果が発揮されず、逆に多過ぎるとスコーチが速くなり過ぎ、加工性が悪化する（ゴムが粉々になる）ので好ましくない。 The 4,4'-oxybis (benzenesulfonyl azide) (OBSA) main chain modifier, which is the compounding agent of the present invention, is 0.1 to 1 part by weight, preferably 0. 1 part by weight based on 100 parts by weight of the diene rubber. Used in an amount of 2 to 0.6 parts by weight. If the amount is too small, the desired effect cannot be exhibited. On the other hand, if the amount is too large, the scorch becomes too fast and the workability deteriorates (the rubber becomes shattered), which is not preferable.
本発明では、当該主鎖変性剤は、前記した反応機構による反応を十分に進めておくことが必要であるため、これを加硫系配合剤の添加前のフィラー等を含むジエン系ゴムに対して、例えばバンバリーミキサー等を用いて１６０〜１７０℃の加熱条件下で予め配合混練しておくことが重要である。かかる混練中に、当該主鎖変性剤から発生する窒素ガスは、系外へ排出されるためゴム中に残らず、混練後のゴムが発泡ゴムとなることはない。尚、加硫系配合剤を添加する最終混合段階でこの主鎖変性材を添加した場合には、発生した窒素ガスがゴム系内に留まるため、発泡ゴムとなり、タイヤ用途には適さない。 In the present invention, since the main chain modifier is required to sufficiently advance the reaction by the reaction mechanism described above, this is used for the diene rubber containing the filler before the addition of the vulcanizing compounding agent. For example, it is important to blend and knead in advance using a Banbury mixer or the like under a heating condition of 160 to 170 ° C. During such kneading, the nitrogen gas generated from the main chain modifier is discharged out of the system, so it does not remain in the rubber and the kneaded rubber does not become foamed rubber. In addition, when this main chain modifier is added in the final mixing stage in which the vulcanizing compounding agent is added, the generated nitrogen gas remains in the rubber system, so that it becomes foamed rubber and is not suitable for tire use.
本発明のタイヤ用ゴム組成物には、フィラーとして、一般のカーボンブラック又はシリカ、あるいはこれらを併用して、通常の所定範囲で配合することができる。本発明によれば、かかるフィラーの配合は、フィラーの分散性の観点から前記第一次混合時に添加する。 In the tire rubber composition of the present invention, general carbon black or silica, or a combination thereof, can be blended in a normal predetermined range as a filler. According to the present invention , the filler is added during the primary mixing from the viewpoint of filler dispersibility .
本発明において成分（Ｃ）として使用する加硫系配合剤としては、例えば加硫又は架橋剤、加硫又は架橋促進剤、加硫促進助剤などがあげられ、これらは従来からタイヤ用ゴム組成物に配合される任意のものを使用することができる。 Examples of the vulcanizing compound used as the component (C) in the present invention include a vulcanization or crosslinking agent, a vulcanization or crosslinking accelerator, a vulcanization acceleration aid, and the like. Any compounded in the product can be used.
本発明のタイヤ用ゴム組成物には、更に、老化防止剤、シランカップリング剤などのタイヤ用ゴム組成物に配合されている各種配合剤を配合することができ、かかる配合剤は、任意の時期に、一般的な方法で混練してゴム組成物とし、加硫または架橋することができる。これら配合剤の配合量も、本発明の目的に反しない限り、従来の一般的な配合量とすることができる。 In the tire rubber composition of the present invention, various compounding agents blended in the tire rubber composition such as an anti-aging agent and a silane coupling agent can be further blended. At any time, the rubber composition can be kneaded by a general method to be vulcanized or crosslinked. The compounding amounts of these compounding agents can be set to conventional general compounding amounts as long as the object of the present invention is not adversely affected.
以下、実施例及び比較例によって本発明を更に説明するが、本発明の範囲をこれらの実施例に限定するものでないことは言うまでもない。 Hereinafter, although an example and a comparative example explain the present invention further, it cannot be overemphasized that the scope of the present invention is not limited to these examples.
実施例１〜１２及び比較例１〜８
サンプルの調製
表Ｉ及び表IIに示す配合（重量部）に従って、硫黄及び加硫促進剤を除くゴム、ＯＢＳＡ，カーボンブラックなどの各配合成分を１.７リットルのＢ型バンバリーミキサーに装填して５〜６分間混合し、１６５℃に達したときに得られたマスターバッチに、硫黄と加硫促進剤を配合してオープンロールにて混練することでゴム組成物を得、その一部を以下の加硫速度試験に供した。次いで、残部のゴム組成物を所定の金型中で、１６０℃で２０分間プレス加硫して試験サンプル（ゴムシート）を作製し、以下の転がり抵抗及び引張試験に供した。結果を、表Ｉ及び表IIに示す。
Examples 1-12 and Comparative Examples 1-8
Sample preparation In accordance with the formulation (parts by weight) shown in Table I and Table II, each compounding component such as rubber, OBSA, and carbon black excluding sulfur and vulcanization accelerator was loaded into a 1.7 liter B-type Banbury mixer. Mix for 5 to 6 minutes and mix with sulfur and a vulcanization accelerator in a master batch obtained when the temperature reaches 165 ° C. and knead with an open roll to obtain a rubber composition, part of which is This was subjected to a vulcanization rate test. Next, the remaining rubber composition was press vulcanized at 160 ° C. for 20 minutes in a predetermined mold to prepare a test sample (rubber sheet), which was subjected to the following rolling resistance and tensile tests. The results are shown in Table I and Table II.
試験方法
１）加硫速度： ＪＩＳ Ｋ６３００に準拠して測定した。振動式ディスク加硫試験機を用いて、振幅１度、１６０℃の条件下で、３０％加硫度に達する時間（分）を測定した。
２）転がり抵抗性： ＪＩＳ Ｋ６３９４に準拠して、（株）東洋精機製作所製の粘弾性スペクトロメーターを用いて、初期歪＝１０％、振幅＝±２％、周波数＝２０Ｈｚの条件下でｔａｎδ（６０℃）を測定し、この値をもって転がり抵抗性を評価した。結果は、比較例１，２，５及び７の値を１００として指数で示した。この指数が小さい程、転がり抵抗性が良好であることを示す。
３）破断強度： ＪＩＳ Ｋ６２５１に準拠して、ＪＩＳ３号ダンベル状サンプルを用いて、破断時引張強さ（ＴB）を測定した。結果は、比較例１，２，５及び７の値を１００として指数で示した。この指数が大きい程、破断強度が大きいことを示す。
４）スコーチ：ＪＩＳ Ｋ６３００に準拠して温度１２５℃にて粘度が５ムーニー単位上昇する時間を測定した。結果は比較例１，２，５及び７の値を１００として指数で示した。この指数が小さい程スコーチが早く加工性が悪化することを示す。
Test method 1) Vulcanization rate: Measured according to JIS K6300. Using a vibration disk vulcanization tester, the time (minutes) required to reach a 30% vulcanization degree was measured under the conditions of an amplitude of 1 degree and 160 ° C.
2) Rolling resistance: In accordance with JIS K6394, using a viscoelastic spectrometer manufactured by Toyo Seiki Seisakusho Co., Ltd., under the conditions of initial strain = 10%, amplitude = ± 2%, frequency = 20 Hz, 60 ° C) was measured, and the rolling resistance was evaluated with this value. The results are shown as an index with the values of Comparative Examples 1, 2, 5, and 7 as 100. The smaller this index, the better the rolling resistance.
3) Breaking strength: Based on JIS K6251, the tensile strength at break (T B ) was measured using a JIS No. 3 dumbbell-shaped sample. The results are shown as an index with the values of Comparative Examples 1, 2, 5, and 7 as 100. It shows that breaking strength is so large that this index | exponent is large.
4) Scorch: The time for the viscosity to rise by 5 Mooney units at a temperature of 125 ° C. was measured according to JIS K6300. The results are shown as an index with the values of Comparative Examples 1, 2, 5 and 7 as 100. The smaller the index, the faster the scorch and the worse the workability.
表Ｉ及び表IIの結果によれば、本発明によるゴム組成物では、破断強度を損なうこと無しに、転がり抵抗が向上し、かつ加硫速度が速くなっていることが判る。 According to the results of Table I and Table II, it can be seen that the rubber composition according to the present invention has improved rolling resistance and increased vulcanization speed without impairing the breaking strength.
以上の通り、本発明のＯＢＳＡを第一次混合時に配合したゴム組成物は、破断強度を損なうこと無しに、転がり抵抗が向上することから、これを空気入りタイヤ、特にタイヤトレッド用として利用すれば極めて有用である。 As described above, the rubber composition containing the OBSA of the present invention at the time of the primary mixing improves rolling resistance without impairing the breaking strength, so that it can be used for pneumatic tires, particularly tire treads. Is extremely useful.
Claims (2)
を含んでなり、成分（Ａ），（Ｂ）及び（Ｄ）を成分（Ｃ）の添加前の第一次混合時に混合してなるタイヤ用ゴム組成物。 (A) Natural rubber (NR), isoprene rubber (IR), butadiene rubber (BR), styrene-butadiene copolymer rubber (SBR), acrylonitrile-butadiene copolymer rubber (NBR), styrene-isoprene copolymer rubber 100 parts by weight of at least one sulfur vulcanizable diene rubber selected from styrene-isoprene-butadiene copolymer rubber and isoprene-butadiene copolymer rubber , (B) 4,4′-oxybis (benzenesulfonyl azide) 0.1 to 1 part by weight and (C) a vulcanizing compound and (D) carbon black and / or silica as a filler , and components (A) , (B) and (D) A rubber composition for tires obtained by mixing at the time of primary mixing before addition of component (C).
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008195415A JP4312252B2 (en) | 2007-10-05 | 2008-07-29 | Rubber composition for tire and pneumatic tire using the same |
| DE102008050219.7A DE102008050219B4 (en) | 2007-10-05 | 2008-10-02 | Rubber composition for tires, manufacture and use of the like and vulcanized composition |
| US12/245,014 US7671137B2 (en) | 2007-10-05 | 2008-10-03 | Rubber composition for tire |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007262467 | 2007-10-05 | ||
| JP2008195415A JP4312252B2 (en) | 2007-10-05 | 2008-07-29 | Rubber composition for tire and pneumatic tire using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2009102614A JP2009102614A (en) | 2009-05-14 |
| JP4312252B2 true JP4312252B2 (en) | 2009-08-12 |
Family
ID=40704624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2008195415A Active JP4312252B2 (en) | 2007-10-05 | 2008-07-29 | Rubber composition for tire and pneumatic tire using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4312252B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101758422B1 (en) * | 2010-09-15 | 2017-07-14 | 다우 글로벌 테크놀로지스 엘엘씨 | Propylene-alpha-olefin copolymer compositions with improved foaming window |
| JP6351495B2 (en) | 2014-12-16 | 2018-07-04 | 住友ゴム工業株式会社 | Pneumatic tire |
-
2008
- 2008-07-29 JP JP2008195415A patent/JP4312252B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2009102614A (en) | 2009-05-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5286642B2 (en) | Rubber composition for tire and pneumatic tire using the same | |
| JP6988405B2 (en) | Rubber composition for tires and pneumatic tires | |
| JP2008019334A (en) | Rubber composition for tire tread | |
| JP2008169296A (en) | Rubber composition and pneumatic tire produced by using the same | |
| JP2008138086A (en) | Rubber composition for tire tread | |
| JP2009203288A (en) | Rubber composition for tire tread | |
| JP5521322B2 (en) | Rubber composition for tire tread | |
| JP2005146115A (en) | Tire tread rubber composition | |
| JP2011246563A (en) | Rubber composition for tire and pneumatic tire using the same | |
| WO2023079865A1 (en) | Rubber composition and tire made therefrom | |
| JP2005139230A (en) | Rubber composition and tire for racing car using the same | |
| JP4876403B2 (en) | Rubber composition for tire | |
| JP2008222845A (en) | Rubber composition for tire | |
| JP2009084485A (en) | Rubber composition for tire tread | |
| JP2009235274A (en) | Rubber composition and tire using the same | |
| JP5003011B2 (en) | Rubber composition | |
| JP4312252B2 (en) | Rubber composition for tire and pneumatic tire using the same | |
| JP2009138094A (en) | Rubber composition for tire | |
| JP2007186644A (en) | Rubber composition for tire tread | |
| JP4910416B2 (en) | Rubber composition for tire | |
| JP2005350595A (en) | Pneumatic tire | |
| JP2006169434A (en) | Rubber composition and tire formed from the same | |
| JP6862894B2 (en) | Rubber composition for tires | |
| JP2004091716A (en) | Tire | |
| JP2009185164A (en) | Method for producing modified diene rubber |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20090319 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20090414 |
|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20090512 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120522 Year of fee payment: 3 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 4312252 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120522 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120522 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130522 Year of fee payment: 4 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130522 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130522 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140522 Year of fee payment: 5 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |