JPH0312433A - Rubber composition for tire tread - Google Patents
Rubber composition for tire treadInfo
- Publication number
- JPH0312433A JPH0312433A JP1147392A JP14739289A JPH0312433A JP H0312433 A JPH0312433 A JP H0312433A JP 1147392 A JP1147392 A JP 1147392A JP 14739289 A JP14739289 A JP 14739289A JP H0312433 A JPH0312433 A JP H0312433A
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- weight
- parts
- tire tread
- bonds
- 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 39
- 239000005060 rubber Substances 0.000 title claims abstract description 39
- 239000000203 mixture Substances 0.000 title claims abstract description 16
- 229920005549 butyl rubber Polymers 0.000 claims abstract description 15
- 150000001993 dienes Chemical class 0.000 claims abstract description 9
- 229920001195 polyisoprene Polymers 0.000 claims abstract description 9
- 229920002554 vinyl polymer Polymers 0.000 claims abstract description 9
- 229920002857 polybutadiene Polymers 0.000 claims abstract description 8
- 229920003048 styrene butadiene rubber Polymers 0.000 claims abstract description 8
- 244000043261 Hevea brasiliensis Species 0.000 claims abstract description 6
- 229920003052 natural elastomer Polymers 0.000 claims abstract description 6
- 229920001194 natural rubber Polymers 0.000 claims abstract description 6
- KAKZBPTYRLMSJV-UHFFFAOYSA-N butadiene group Chemical group C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000005096 rolling process Methods 0.000 abstract description 13
- 238000005299 abrasion Methods 0.000 abstract description 9
- 238000002156 mixing Methods 0.000 abstract 1
- 229920003051 synthetic elastomer Polymers 0.000 description 6
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- -1 butyl halide Chemical class 0.000 description 3
- 238000013329 compounding Methods 0.000 description 3
- 229920005555 halobutyl Polymers 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 3
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000012744 reinforcing agent Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical group CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 229930192627 Naphthoquinone Natural products 0.000 description 1
- 229920002367 Polyisobutene Polymers 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 125000003342 alkenyl group Chemical group 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 125000003710 aryl alkyl group Chemical group 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 229920005556 chlorobutyl Polymers 0.000 description 1
- 238000006356 dehydrogenation reaction Methods 0.000 description 1
- 238000006704 dehydrohalogenation reaction Methods 0.000 description 1
- 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 1
- 125000002897 diene group Chemical group 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229920003049 isoprene rubber Polymers 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 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 1
- 150000002791 naphthoquinones Chemical class 0.000 description 1
- AZQWKYJCGOJGHM-UHFFFAOYSA-N para-benzoquinone Natural products O=C1C=CC(=O)C=C1 AZQWKYJCGOJGHM-UHFFFAOYSA-N 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- UGNWTBMOAKPKBL-UHFFFAOYSA-N tetrachloro-1,4-benzoquinone Chemical compound ClC1=C(Cl)C(=O)C(Cl)=C(Cl)C1=O UGNWTBMOAKPKBL-UHFFFAOYSA-N 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)
Abstract
Description
【発明の詳細な説明】
（ａ）産業上の利用分野
本発明は、破壊強度、耐摩耗性、ウェットスキッド、お
よびころがり抵抗性に優れたタイヤトレッド用ゴム組成
物に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Field of Application The present invention relates to a rubber composition for a tire tread that has excellent breaking strength, abrasion resistance, wet skid, and rolling resistance.
（ｂ）従来の技術
従来から、乗用車用タイヤ会トレッドゴム材料としては
、一般にスチレン−ブタジエン共重合ゴムとポリブタジ
ェンゴムとのブレンドで使用されてきた。スチレン−ブ
タジエン共重合ゴムのみを用いた場合は、湿潤路面での
制動性能（ウェットスキッド）は比較的良いが、５０〜
７０℃での反撥弾性が低いためころがり抵抗が大きく、
耐摩耗性も悪い。この対策として、ポリブタジェンゴム
を一般に１０〜５０ｆｆｌｆｆｉ部ブレンドして用いら
れてきた。しかし、最近の省エネルギー化により、高い
低燃費性、耐摩耗性に加えて、さらに安全性の面より高
い湿潤路面での制動性能が要望されており、従来のスチ
レン−ブタジエン共重合ゴムとポリブタジェンゴムのブ
レンド系では不十分であり、高い水準の湿潤路面の制動
性能と耐摩耗性および大幅なころがり抵抗低減可能なト
レッド材料の開発が大きな課題となっている。(b) Prior Art Conventionally, tread rubber materials for passenger car tires have generally been used as a blend of styrene-butadiene copolymer rubber and polybutadiene rubber. When only styrene-butadiene copolymer rubber is used, the braking performance on wet roads (wet skid) is relatively good, but the
Low rebound elasticity at 70°C results in high rolling resistance.
It also has poor wear resistance. As a countermeasure to this problem, polybutadiene rubber has generally been blended in an amount of 10 to 50 parts. However, with recent efforts to save energy, in addition to high fuel efficiency and wear resistance, there is a demand for higher braking performance on wet roads than for safety, and conventional styrene-butadiene copolymer rubber and polybutane Gen rubber blend systems are insufficient, and the development of tread materials that have high levels of braking performance and wear resistance on wet roads and can significantly reduce rolling resistance is a major challenge.
その改良のために、ハロゲン化ブチルゴムとポリブタジ
ェンゴムのブレンド系を用いた例もあるが（特開昭５６
−９３７３８） 、ウェットスキッド、耐摩耗性および
ころがり抵抗はまだ十分ではない。In order to improve this, there are examples of using a blend system of halogenated butyl rubber and polybutadiene rubber (Japanese Unexamined Patent Publication No. 56
-93738), wet skid, abrasion resistance and rolling resistance are still not sufficient.
（ｃ）発明が解決しようとする問題点
本発明は、共役ジエンブチルゴムと天然ゴムおよび／ま
たは高シスポリイソプレンゴム、またはこれらとポリブ
タジェンゴム、スチレン−ブタジエン共重合ゴム、イソ
プレンゴムとを特定の組成比でブレンドすることにより
、破壊強度、耐摩耗性、ウェットスキッド、ころがり抵
抗に優れた性質を有するタイヤトレッド用ゴム組成物を
提供する。(c) Problems to be Solved by the Invention The present invention specifies conjugated diene butyl rubber and natural rubber and/or high-cis polyisoprene rubber, or these and polybutadiene rubber, styrene-butadiene copolymer rubber, and isoprene rubber. The present invention provides a rubber composition for a tire tread having excellent properties in breaking strength, abrasion resistance, wet skid, and rolling resistance.
（ｄ）問題を解決するための手段
本発明は、
（Ａ）共役ジエンブチルゴム１０〜５０重量％と、（Ｂ
）天然ゴムおよび／または高シスポリイソプレンゴム３
０〜９０重量％と、
（Ｃ）１．２ビニル結合金有量が２０％以上のポリブタ
ジェンゴム、またはブタジェン部分の１．２ビニル結合
金有量が２０％以上であるスチレン−ブタジエン共重合
ゴム、または１゜２結合と３，４結合の和が２０％以上
であるポリイソプレンゴムから選ばれた少なくとも１種
のゴム０〜６０重合％
からなるタイヤトレッド用ゴム組成物であり、これによ
って前記問題点を解決するものである。(d) Means for solving the problem The present invention comprises (A) 10 to 50% by weight of conjugated diene butyl rubber;
) Natural rubber and/or high cis polyisoprene rubber 3
(C) Polybutadiene rubber with a 1.2 vinyl bond metal content of 20% or more, or styrene-butadiene rubber with a 1.2 vinyl bond metal content of the butadiene portion of 20% or more. A rubber composition for a tire tread comprising 0 to 60% polymerization of at least one rubber selected from polymerized rubber or polyisoprene rubber in which the sum of 1°2 bonds and 3,4 bonds is 20% or more. This solves the above problems.
本発明の（Ａ）成分である共役ジエンブチルゴムとは、
ブチルゴムのポリマー骨格に共役な二重結合が導入され
たブチルゴムであり、通常、ハロゲン化ブチルの脱ハロ
ゲン化水素によって合成することができる。ポリマー世
路に導入された共役な二重結合の含量は、加硫上および
物性上から、好ましくは０．２〜１０モル％、さらに好
ましくは０． ２〜５モル％である。The conjugated diene butyl rubber that is component (A) of the present invention is:
Butyl rubber has a conjugated double bond introduced into the polymer backbone of butyl rubber, and can usually be synthesized by dehydrohalogenation of butyl halide. The content of conjugated double bonds introduced into the polymer channel is preferably 0.2 to 10 mol%, more preferably 0.2 to 10 mol%, from the viewpoint of vulcanization and physical properties. It is 2 to 5 mol%.
本発明に使用される共役ジエンブチルゴムの具体的製造
方法としては、以下のものが挙げられる。Specific methods for producing the conjugated diene butyl rubber used in the present invention include the following.
■ ハロゲン化ブチルゴムを、金属アルコラード、還元
された金属、あるいはＺｎＯ／ＲＣＯＯＨ。■ Halogenated butyl rubber, metal alcoholade, reduced metal, or ZnO/RCOOH.
（ＲＣＯＯ）２ Ｚｎ／ＲＣＯＯＨ／ＣａＯ（ＲＣＯＯ
）２ Ｚｎ／ （ＲＣＯＯ）２ Ｃａ （式中、Ｒは炭
素数１〜３０のアルキル基、アラルキル基、アルケニル
基、またはアリール基を表わす）などの脱ハロゲン化水
素剤を用いて共役ジエン単位含有ブチルゴム（共役ジエ
ンブチルゴム）を製造する方法（米国特許第３，９６５
．２１３号明細書、特開昭４８−９０３８５号公報、特
開昭５３−４２２８９号公報、特公昭５７−１４３６３
号公報、特開昭５９−８４９０１号公報）。(RCOO)2 Zn/RCOOH/CaO(RCOO
)2 Zn/ (RCOO)2 Ca (in the formula, R represents an alkyl group, an aralkyl group, an alkenyl group, or an aryl group having 1 to 30 carbon atoms) containing a conjugated diene unit using a dehydrohalogenating agent such as Method for producing butyl rubber (conjugated diene butyl rubber) (U.S. Pat. No. 3,965)
．． Specification No. 213, JP-A-48-90385, JP-A-53-42289, JP-A-57-14363
(Japanese Patent Application Laid-Open No. 59-84901).
■ ブチルゴムに、リチウム、カリウム、あるいはナト
リウムなどのアルカリ金属を付加した後、脱水素化金属
を行なう方法。■ A method in which alkali metals such as lithium, potassium, or sodium are added to butyl rubber, and then metal dehydrogenation is performed.
■ ポリイソブチレン、ブチルゴムまたはハロゲン化ブ
チルゴムと、クロラニル、ナフトキノンなどのキノン化
合物で溶液下、あるいは固体下で処理することにより変
性する方法。■ A method of modifying polyisobutylene, butyl rubber, or halogenated butyl rubber by treating it with a quinone compound such as chloranil or naphthoquinone in solution or solid state.
本発明において、（Ａ）成分である共役ジエンブチルゴ
ムは、原料ゴム１００重量部中１０〜５０重量部、好ま
しくは１５〜４５重」部配合される。１０重量部未満で
はウェットスキッドが劣り、５０重量部超では耐摩耗性
が劣る。In the present invention, the component (A), conjugated diene butyl rubber, is blended in an amount of 10 to 50 parts by weight, preferably 15 to 45 parts by weight, per 100 parts by weight of the raw material rubber. If it is less than 10 parts by weight, the wet skid will be poor, and if it exceeds 50 parts by weight, the abrasion resistance will be poor.
本発明において、（Ｂ）成分である天然ゴムおよび／ま
たは高シスポリイソプレンゴムは、原料ゴム１００重量
部中３０〜９０重量部、好ましくは２５〜８５重命部配
合される。３０重合部未満では、引張強さ、引裂強さ、
およびころがり抵抗が劣り、９０重量部超ではウェット
スキッドが劣る。In the present invention, the natural rubber and/or high-cis polyisoprene rubber as component (B) is blended in an amount of 30 to 90 parts by weight, preferably 25 to 85 parts by weight, per 100 parts by weight of the raw material rubber. If the polymerization part is less than 30, the tensile strength, tear strength,
Moreover, the rolling resistance is poor, and if it exceeds 90 parts by weight, the wet skid is poor.
本発明において、（Ｃ）成分であるポリブタジェンゴム
、スチレン−ブタジエン共重合ゴム、およびポリイソプ
レンゴムのブタジェン部またはイソプレン部の結合は、
１，２結合または１，２結合と３，４結合の和が２０％
以上である。２０％未満では、他のポリマーとの相溶性
およびウェットスキッドが劣る。In the present invention, the bonding of the butadiene moiety or isoprene moiety of the polybutadiene rubber, styrene-butadiene copolymer rubber, and polyisoprene rubber that are component (C) is
The sum of 1,2 bonds or 1,2 bonds and 3,4 bonds is 20%
That's all. If it is less than 20%, compatibility with other polymers and wet skid are poor.
（Ｃ）成分のゴムは、原料ゴム１００重量部中０〜６０
重量部、好ましくは５〜５５重量部配ビオれる。Component (C) rubber is 0 to 60 parts by weight in 100 parts by weight of raw rubber.
Parts by weight, preferably 5 to 55 parts by weight.
（Ｃ）成分を加えることにより、破壊強度、耐摩耗性、
ウェットスキッド、ころがり抵抗がよりバランスがとれ
た組成物が得られる。By adding component (C), fracture strength, wear resistance,
A composition with more balanced wet skid and rolling resistance is obtained.
本発明においては、配合剤としては、通常使用される配
合剤、例えばカーボンブラックなどの補強剤、加硫促進
剤、老化防止剤、硫黄などを適宜使用することができる
。In the present invention, as compounding agents, commonly used compounding agents such as reinforcing agents such as carbon black, vulcanization accelerators, anti-aging agents, sulfur, etc. can be used as appropriate.
補強剤の好ましい配合量は、原料ゴム１００重量部に対
して、３０〜１５０重量部、さらに好ましくは４０〜１
００重量部である。多すぎるとウェットスキッドは向上
するが、ころがり抵抗が劣る傾向にあり、また少なすぎ
ると耐摩耗性が低下して（る。The preferred amount of the reinforcing agent is 30 to 150 parts by weight, more preferably 40 to 1 part by weight, based on 100 parts by weight of the raw rubber.
00 parts by weight. If it is too large, wet skid will improve, but rolling resistance will tend to be poor, and if it is too small, wear resistance will decrease.
（ｅ）実施例
以下、実施例および比較例により本発明を具体的に説明
する。なお、表中のゴム組成物の配合数値はすべて重量
部とし、またゴム特性は下記の試験方法で評価した。(e) Examples Hereinafter, the present invention will be specifically explained using Examples and Comparative Examples. Note that all compounding figures for the rubber compositions in the table are parts by weight, and the rubber properties were evaluated by the following test method.
すなわち、破壊強度は引張強さおよび引裂強さにより、
耐摩耗性はＤＩＮおよびランボーンの方法により、ウェ
ットスキッドはスペクトロメーターによる０℃でのｔａ
ｎδおよび２５℃の反撥弾性により、ころがり抵抗につ
いてはスペクトロメーターによる５０℃でのｔａｎδお
よび５０℃での反撥弾性により評価した。In other words, the breaking strength is determined by the tensile strength and tear strength.
Abrasion resistance was determined by the DIN and Lambourn methods, and wet skids were determined by the ta at 0°C using a spectrometer.
The rolling resistance was evaluated by tan δ at 50° C. and the impact resilience at 50° C. using a spectrometer.
試験方法 （１）引張強さ：ＪＩＳ Ｋ６３０１に準じた。Test method (1) Tensile strength: According to JIS K6301.
（２）引裂強さ：ＪＩＳ Ｋ６３０１に準じた。(2) Tear strength: According to JIS K6301.
（３）ＤＩＮ摩耗：ＤＩＮ５３５１６に準じた。(3) DIN wear: According to DIN53516.
け）ランボーン摩耗：岩本製作所製で測定（条件；荷重
３ｋｇ、サンプルの周速１５０ ｍ／ｍｉｎ 、砥石の
周速１００ ｍ／ｓｉｎ ）
（５） ｔａｎδ：レオメトリックス社製、ダイヤミ
ックスペクトロメーターで測定（条件；歪せん断０．７
％、周波数１５１１ｚ）
（６）反撥弾性：ダンロップ・トリプソメーターで測定
実施例１〜７、比較例１〜６
表−１に、配合処方および１５０℃で加硫した加硫物の
試験結果を示す。) Lambourn wear: Measured using Iwamoto Seisakusho Co., Ltd. (Conditions: load 3 kg, sample circumferential speed 150 m/min, grindstone circumferential speed 100 m/sin) (5) tan δ: Measured using a diamic spectrometer manufactured by Rheometrics. (Condition: Strain shear 0.7
%, frequency 1511z) (6) Impact resilience: Measured with a Dunlop trypsometer Examples 1 to 7, Comparative Examples 1 to 6 show.
注）
■）日本合成ゴム株式会社製、ＭＬ （１００１＋
４
℃）−６０、共役二重結合金世１．４モル％２）日本合
成ゴム株式会社製、クロロブチル１０６８ ＭＬ
（１２５℃）−５０１＋８
３）日本合成ゴム株式会社製、ビニル量２７％、ＭＬ
（１００℃）−６０
１＋４
４）日本合成ゴム株式会社製、スチレンｆｆ１１５％、
ビニルｍ５７％、ＭＬ （１００℃）−６１＋４
５）日本合成ゴム株式会社製、ビニルｆｆ１６０％、Ｍ
Ｌ （１００℃）−５０
１＋４
６）Ｒ３Ｓ＃３、ＭＬ （１００℃）−８０１＋４
７） Ｎ−フユニルーＮ′−イソプロピル−ｐ−フェニ
レンジアミン
８） Ｎ−オキシ・ジエチレン−２−ベンゾチアゾール
会スルフェンアミド
９） Ｎ−第三−ブチル−２−ベンゾチアジル・スルフ
ェンアミド
１０）ジベンゾチアジル・ジサルファイド１１）日本合
成ゴム株式会社製、ＪＳＲｌＲ２２０
実施例１〜７に見られるように、この発明に従うゴム組
成物は、引張強さ、引裂強さで示される破壊強度、耐摩
耗性、０℃でのｔａｎδ、２５°Ｃの反撥弾性の特性で
示されるウェットスキッドおよび５０℃でのｔａｎδ、
および反撥弾性で示されるころがり抵抗に優れ、タイヤ
トレッドゴム組成物として好適である。これに対して比
較例は、破壊強度、耐摩耗性、ウェットスキッドおよび
ころがり抵抗のバランスに欠けるので、タイヤトレッド
用ゴム組成物として適当でない。Note) ■) Manufactured by Japan Synthetic Rubber Co., Ltd., ML (1001+
4°C) -60, conjugated double bond gold 1.4 mol% 2) Nippon Synthetic Rubber Co., Ltd., chlorobutyl 1068 ML
(125℃) -501+8 3) Manufactured by Japan Synthetic Rubber Co., Ltd., vinyl content 27%, ML
(100℃) -60 1+4 4) Manufactured by Japan Synthetic Rubber Co., Ltd., styrene ff115%,
Vinyl m57%, ML (100℃) -61+4 5) Made by Japan Synthetic Rubber Co., Ltd., vinyl ff160%, M
L (100°C) -50 1+4 6) R3S#3, ML (100°C) -801+4 7) N-phenylene-N'-isopropyl-p-phenylenediamine 8) N-oxydiethylene-2-benzothiazole sulfene Amide 9) N-tert-butyl-2-benzothiazyl sulfenamide 10) Dibenzothiazyl disulfide 11) JSRlR220 manufactured by Japan Synthetic Rubber Co., Ltd. Rubber according to the invention as seen in Examples 1 to 7 The composition has properties such as tensile strength, breaking strength as indicated by tear strength, abrasion resistance, tan δ at 0°C, wet skid as shown in rebound properties at 25°C, and tan δ at 50°C.
It also has excellent rolling resistance as indicated by rebound resilience, and is suitable as a tire tread rubber composition. On the other hand, Comparative Examples lack a balance in breaking strength, abrasion resistance, wet skid and rolling resistance, and are therefore not suitable as rubber compositions for tire treads.
（ｆ）発明の効果
以上、実施例および比較例で示したように、この発明の
共役ジエンブチルゴムを含有するゴム組成物は、タイヤ
トレッドに必要な耐摩耗性、ウェットスキッドおよびこ
ろがり抵抗も良好なバランスで同時に満足させる。また
、引張強さおよび引裂強さも大幅に改良される。(f) Effects of the Invention As shown in Examples and Comparative Examples, the rubber composition containing the conjugated diene butyl rubber of the present invention has good abrasion resistance, wet skid and rolling resistance required for tire treads. Balance and satisfy at the same time. The tensile strength and tear strength are also significantly improved.
Claims (1)
、 （Ｂ）天然ゴムおよび／または高シスポリイソプレンゴ
ム３０〜９０重量％と、 （Ｃ）１，２−ビニル結合含量が２０％以上のポリブタ
ジエンゴム、ブタジエン部分の１，２−ビニル結合含量
が２０％以上のスチレン−ブタジエン共重合ゴム、およ
び１、２結合と３、４結合の和が２０％以上であるポリ
イソプレンゴムから選ばれた少なくとも１種のゴム０〜
６０重量％ を含むタイヤトレッド用ゴム組成物。(1) (A) 10 to 50% by weight of conjugated diene butyl rubber; (B) 30 to 90% by weight of natural rubber and/or high-cis polyisoprene rubber; (C) 1,2-vinyl bond content of 20% or more selected from polybutadiene rubber, styrene-butadiene copolymer rubber in which the content of 1,2-vinyl bonds in the butadiene moiety is 20% or more, and polyisoprene rubber in which the sum of 1,2 bonds and 3,4 bonds is 20% or more. At least one rubber 0~
A rubber composition for a tire tread containing 60% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1147392A JPH0312433A (en) | 1989-06-09 | 1989-06-09 | Rubber composition for tire tread |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1147392A JPH0312433A (en) | 1989-06-09 | 1989-06-09 | Rubber composition for tire tread |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0312433A true JPH0312433A (en) | 1991-01-21 |
Family
ID=15429230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1147392A Pending JPH0312433A (en) | 1989-06-09 | 1989-06-09 | Rubber composition for tire tread |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0312433A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007112928A (en) * | 2005-10-21 | 2007-05-10 | Bridgestone Corp | Rubber composition and tire using the same |
| EP3670551A3 (en) * | 2011-02-04 | 2020-09-02 | Bridgestone Corporation | Copolymer, rubber composition, rubber composition for tire side use, crosslinked rubber composition and tire |
-
1989
- 1989-06-09 JP JP1147392A patent/JPH0312433A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007112928A (en) * | 2005-10-21 | 2007-05-10 | Bridgestone Corp | Rubber composition and tire using the same |
| EP3670551A3 (en) * | 2011-02-04 | 2020-09-02 | Bridgestone Corporation | Copolymer, rubber composition, rubber composition for tire side use, crosslinked rubber composition and tire |
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