JP3305230B2 - Rubber composition and pneumatic tire using the same - Google Patents
Rubber composition and pneumatic tire using the sameInfo
- Publication number
- JP3305230B2 JP3305230B2 JP12888997A JP12888997A JP3305230B2 JP 3305230 B2 JP3305230 B2 JP 3305230B2 JP 12888997 A JP12888997 A JP 12888997A JP 12888997 A JP12888997 A JP 12888997A JP 3305230 B2 JP3305230 B2 JP 3305230B2
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- thermoplastic resin
- rubber composition
- particles
- pneumatic tire
- 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 - Fee Related
Links
Landscapes
- Tires In General (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【発明の属する技術分野】本発明は、気体を封入した熱
可塑性樹脂粒子を配合したゴム組成物をタイヤの構成部
材（トレッド部、サイド、ビードフィラー、アンダート
レッド等）に用いた空気入りタイヤに関する。BACKGROUND OF THE INVENTION The present invention provides components of a tire rubber composition containing a thermoplastic resin particles encapsulating gas (tread portion, side, bead filler, undertread, etc.) to a pneumatic tire using the .
【０００２】[0002]
【従来の技術】従来、ゴム組成物の軽量化や制振性の向
上のために、ガラスビーズやセラミックビーズが使用さ
れること（例えば、特開平７−２５８４７５号公報）、
また、タイヤのサイドやビードフィラー部材に無機中空
フィラーを配合して軽量化を図ること（例えば、特開平
７−２１５０１８号公報、特開平７−２５７１１８号公
報）、更に、膨張させて中空にした架橋中空ポリマー粒
子をゴムに配合して、制振用ゴムの軽量化を図ること等
の技術が知られている。また、金属酸化物でコートした
ポリアクリロニトリル中空粒子をゴムに配合してゴム組
成物の軽量化および滑り止めを図ったものも知られてい
る。しかしながら、これら従来の技術は、中空粒子を構
成する部材が無機物質であるため、その軽量化の効果は
発揮するもののその混合・加工時に一部のものが破壊し
たり、また、無機物なるが為に柔軟性の点で問題があっ
たし、また前記架橋中空ポリマーを用いたものについて
も、中空ポリマー体の外穀が架橋硬化されている為に硬
く、その混練、加工時に一部のものが漬れたり、架橋ポ
リマー中に揮発性物質を封入し熱によりガス化膨張させ
ることもできるが、強固に架橋してあるため、膨張率に
限界があり軽量化に十分なものは得られない。また、配
合ゴム組成物の外部応力に追従する柔軟性等の点でも未
だ充分なものではなかった。2. Description of the Related Art Conventionally, glass beads and ceramic beads have been used to reduce the weight and improve the vibration damping properties of rubber compositions (see, for example, JP-A-7-258475).
Also, an inorganic hollow filler is blended into the tire side or bead filler member to reduce the weight (for example, JP-A-7-215018, JP-A-7-257118), and further expanded to make it hollow. There is known a technique of blending crosslinked hollow polymer particles with rubber to reduce the weight of the rubber for vibration damping. There is also known a rubber composition in which hollow polyacrylonitrile particles coated with a metal oxide are blended with rubber to reduce the weight of the rubber composition and prevent slippage. However, in these conventional techniques, since the members constituting the hollow particles are made of an inorganic material, the effect of reducing the weight is exhibited, but some of them are destroyed at the time of mixing and processing, or the inorganic material is used. There was a problem in terms of flexibility, and also those using the cross-linked hollow polymer, because the outer grains of the hollow polymer body are cross-linked and hardened, its kneading, some during processing. Although it is possible to immerse or enclose a volatile substance in a crosslinked polymer and gasify and expand it by heat, since it is strongly crosslinked, there is a limit to the expansion coefficient, and it is not possible to obtain a material sufficient for weight reduction. Further, the compounded rubber composition is not yet satisfactory in terms of flexibility to follow external stress.
【０００３】[0003]
【発明が解決しようとする課題】従って、本発明では、
前述の従来技術の問題点を克服した、ゴム組成物に配合
する中空微粒子が気体を封入した熱可塑性樹脂粒子であ
る為、中空微粒子よりも更に軽く、また、粒子自体が弾
力性、柔軟性に富む為、タイヤ走行時に生ずる歪みにも
追従し、高い耐久性を示すようなゴム組成物を用いた空
気入りタイヤを提供することを目的とする。Therefore, in the present invention,
Overcoming the above-mentioned problems of the prior art, since the hollow fine particles blended in the rubber composition are thermoplastic resin particles containing gas, they are lighter than the hollow fine particles, and the particles themselves have elasticity and flexibility. Because of its richness, it is possible to follow the distortion generated during tire running and use a rubber composition that exhibits high durability.
It is intended to provide a pneumatic tire .
【０００４】[0004]
【課題を解決するための手段】本発明に従えば、真比重
０.１以下、粒径５〜３００μｍの弾力性のある未架橋
の気体封入熱可塑性樹脂粒子を配合したゴム組成物を用
いた空気入りタイヤが提供される。According to Means for Solving the Problems] The present invention, the true specific gravity of 0.1 or less, resilient uncrosslinked particle size 5~300μm
Use a rubber composition containing the gas-encapsulated thermoplastic resin particles
Pneumatic tires are provided.
【０００５】また、本発明によれば、気体封入熱可塑性
樹脂粒子が、熱により気化、分解又は化学反応して気体
を発生する液体あるいは固体を封入した熱可塑性樹脂粒
子であって、ゴム加硫時の熱によって膨張して中空状と
なり、その膨張開始温度が１２０℃以上で、かつ最大膨
張温度がタイヤの加熱成形温度に対して±２０℃の範囲
内にある未架橋の熱膨張性熱可塑性樹脂粒子を配合した
ゴム組成物を用いた空気入りタイヤが提供される。Further, according to the present invention, the gas-filled thermoplastic resin particles are thermoplastic resin particles in which a liquid or a solid which generates a gas by being vaporized, decomposed or chemically reacted by heat is enclosed, and the rubber vulcanization is carried out. a hollow expanded by heat when
The expansion start temperature is 120 ° C or more and the maximum expansion
Tension temperature is within ± 20 ° C of thermoforming temperature of tire
Provided is a pneumatic tire using a rubber composition containing uncrosslinked thermally expandable thermoplastic resin particles contained therein.
【０００６】更に、本発明によれば、気体封入熱可塑性
樹脂粒子をゴム１００重量部に対して１０〜３０重量部
配合したゴム組成物をタイヤの構成部材に用いた空気入
りタイヤが提供される。Further, according to the present invention, there is provided a pneumatic tire using a rubber composition containing 10 to 30 parts by weight of gas-filled thermoplastic resin particles per 100 parts by weight of rubber for a tire component. .
【０００７】[0007]
【発明の実施の形態】以下に、本発明の構成および作用
効果について説明する。本発明の空気入りタイヤ用ゴム
組成物では、真比重が０.１以下で粒径が５〜３００μ
ｍの弾力性のある未架橋の気体封入熱可塑性樹脂粒子を
加硫ゴムマトリックス中に均一分散してなるゴム組成物
を得ること、また、ゴム材に予め膨張開始温度以上で膨
張する熱膨張性熱可塑性樹脂粒子を所定量配合して膨張
開始温度未満の温度で均一に混練して予備成形物とな
し、次いでその予備成形物をその中に含まれる熱膨張性
熱可塑性樹脂粒子が膨張開始温度以上になる温度で加熱
成形することにより、その熱膨張性熱可塑性樹脂粒子を
膨張させて膨張中空体粒子となし、もってこの膨張中空
体粒子である気体封入熱可塑性樹脂粒子が加硫ゴムマト
リックス中に均一分散された構造のゴム組成物を得るこ
とを特徴としている。前記の熱膨張性熱可塑性樹脂粒子
を構成する熱可塑性樹脂としては、その膨張開始温度が
１２０℃以上で、最大膨張温度が１５０℃以上、好まし
くは１６０℃以上のものが好ましく用いられる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration, operation and effect of the present invention will be described below. In the rubber composition for a pneumatic tire of the present invention, the true specific gravity is 0.1 or less and the particle size is 5 to 300 μm.
to obtain a rubber composition obtained by uniformly dispersing an uncrosslinked gas-filled thermoplastic resin particle having an elasticity of m in a vulcanized rubber matrix. A predetermined amount of thermoplastic resin particles are blended and uniformly kneaded at a temperature lower than the expansion start temperature to form a preform, and then the preform is heat-expandable thermoplastic resin particles contained therein at the expansion start temperature. By heat-molding at a temperature not less than the above, the thermally expandable thermoplastic resin particles are expanded into expanded hollow body particles, so that the gas-filled thermoplastic resin particles as the expanded hollow body particles are contained in the vulcanized rubber matrix. It is characterized in that a rubber composition having a structure uniformly dispersed in the rubber composition is obtained. As the thermoplastic resin constituting the thermally expandable thermoplastic resin particles, the expansion start temperature is
Those having a temperature of 120 ° C. or higher and a maximum expansion temperature of 150 ° C. or higher, preferably 160 ° C. or higher are preferably used.
【０００８】本発明で使用される気体封入熱可塑性樹脂
粒子は、熱により気化、分解又は化学反応して気体を発
生する液体あるいは固体を熱可塑性樹脂に内包した熱膨
張性熱可塑性樹脂粒子を、その膨張開始温度以上の温度
で加熱して膨張させて、その熱可塑性樹脂からなる外穀
中に気体を封じ込めたもので、その気体封入熱可塑性樹
脂粒子の真比重が０．１以下でかつ粒径が５〜３００μ
ｍであるものが好ましく用いられる。このような熱膨張
性熱可塑性樹脂粒子（未膨張粒子）としては、現在、ス
ウェーデンのエクスパンセル社より商品名「ＥＸＰＡＮ
ＣＥＬ０９１ＤＵ−８０」または「ＥＸＰＡＮＣＥＬ０
９２ＤＵ−１２０」等として、あるいは、松本油脂社よ
り商品名「マツモトマイクロスフェアーＦ−８５」また
は「マツモトマイクロスフェアーＦ−１００」等として
入手可能であり、また、気体封入熱可塑性樹脂粒子（既
膨張性粒子）としては、ＥＸＰＡＮＣＥＬ社より商品名
「ＥＸＰＡＮＣＥＬ０９１ＤＥ−８０」等として入手可
能である。The gas-filled thermoplastic resin particles used in the present invention include thermally expandable thermoplastic resin particles in which a liquid or a solid that generates a gas by vaporization, decomposition or chemical reaction by heat is included in the thermoplastic resin. It is heated and expanded at a temperature equal to or higher than the expansion start temperature, and a gas is sealed in an outer grain made of the thermoplastic resin. The true specific gravity of the gas-encapsulated thermoplastic resin particles is 0.1 or less and 5 to 300μ in diameter
What is m is used preferably. Such heat-expandable thermoplastic resin particles (unexpanded particles) are currently available under the trade name "EXPAN" from Expancel of Sweden.
CEL091DU-80 "or" EXPANCEL0
92DU-120 ”or the like, or from Matsumoto Yushi Co., Ltd. under the trade name“ Matsumoto Microsphere F-85 ”or“ Matsumoto Microsphere F-100 ”, etc., and gas-filled thermoplastic resin particles ( (Expandable particles) are available from EXPANCEL under the trade name "EXPANCEL091DE-80".
【０００９】前記気体封入熱可塑性樹脂粒子の外殻成分
を構成する熱可塑性樹脂としては、（メタ）アクリロニ
トリルの重合体または（メタ）アクリロニトリル含有量
の高い共重合体が好適に用いられる。その共重合体の場
合の相手側モノマー（コモノマー）としては、ハロゲン
化ブチル、ハロゲン化ビニリデン、スチレン系モノマ
ー、（メタ）アクリレート系モノマー、酢酸ビニル、ブ
タジエン、ビニルピリジン、クロロプレン等のモノマー
が用いられる。なお、上記の熱可塑性樹脂は、未架橋の
ものが用いられる。 As the thermoplastic resin constituting the outer shell component of the gas-filled thermoplastic resin particles, a polymer of (meth) acrylonitrile or a copolymer having a high content of (meth) acrylonitrile is preferably used. As the partner monomer (comonomer) in the case of the copolymer, monomers such as butyl halide, vinylidene halide, styrene-based monomer, (meth) acrylate-based monomer, vinyl acetate, butadiene, vinylpyridine, chloroprene and the like are used. . In addition, the above thermoplastic resin is uncrosslinked.
Things are used.
【００１０】また、熱により気化、分解又は化学反応し
て気体を発生する液体あるいは固体としては、例えば、
ｎ−ペンタン、イソペンタン、ネオペンタン、ブタン、
イソブタン、ヘキサン、石油エーテルの如き炭化水素
類、塩化メチル、塩化メチレン、ジクロロエチレン、ト
リクロロエタン、トリクロルエチレンの如き塩素化炭化
水素、のような液体、または、アジゾカーボンアミド、
ジニトロソ・ペンタメチレン・テトラミン、アゾビスイ
ソブチロニトリル、トルエンスルホニルヒドラジド誘導
体、芳香族スクシニルヒドラジド誘導体のような固体等
が挙げられる。[0010] Examples of the liquid or solid that generates gas by vaporization, decomposition, or chemical reaction by heat include, for example,
n-pentane, isopentane, neopentane, butane,
Liquids such as hydrocarbons such as isobutane, hexane, petroleum ether, chlorinated hydrocarbons such as methyl chloride, methylene chloride, dichloroethylene, trichloroethane, trichloroethylene, or azizocarbonamide;
Solids such as dinitrosopentamethylenetetramine, azobisisobutyronitrile, toluenesulfonylhydrazide derivative, and aromatic succinylhydrazide derivative are exemplified.
【００１１】本発明に係る空気入りタイヤ用ゴム組成物
に用いられるゴム製分としては、架橋可能なゴム成分
で、単独または２種以上の混合物である。かかるゴム成
分には、例えば、天然ゴム（ＮＲ）、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）、ポリイソプレンゴム（ＩＲ）、ブチルゴム
（ＩＩＲ）、アクリロニトリルブタジエンゴム、クロロ
プレンゴム、エチレン−プロピレン共重合体ゴム、エチ
レン−プロピレン−ジエン共重合体ゴム、スチレン−イ
ソプレン共重合体ゴム、スチレン−イソプレンーブタジ
エン共重合体ゴム、イソプレン−ブタジエン共重合体ゴ
ム、クロロスルホン化ポリエチレン、アクリルゴム、エ
ピクロルヒドリンゴム、多硫化ゴム、シリコーンゴム、
フッ素ゴム、ウレタンゴムなどを用いることができる。The rubber component used in the rubber composition for a pneumatic tire according to the present invention is a crosslinkable rubber component, either alone or as a mixture of two or more. Such rubber components include, for example, natural rubber (NR), various butadiene rubbers (BR), various styrene-butadiene copolymer rubbers (SBR), polyisoprene rubber (IR), butyl rubber (IIR), acrylonitrile butadiene rubber, chloroprene Rubber, ethylene-propylene copolymer rubber, ethylene-propylene-diene copolymer rubber, styrene-isoprene copolymer rubber, styrene-isoprenebutadiene copolymer rubber, isoprene-butadiene copolymer rubber, chlorosulfonated polyethylene , Acrylic rubber, epichlorohydrin rubber, polysulfide rubber, silicone rubber,
Fluorine rubber, urethane rubber, or the like can be used.
【００１２】本発明に係る空気入りタイヤ用ゴム組成物
には、通常タイヤ用ゴム組成物に配合されるカーボンブ
ラックおよび／またはシリカを配合する。更に、通常の
加硫又は架橋剤、加硫又は架橋促進剤、各種オイル、老
化防止剤、充填剤、可塑化剤、軟化剤、その他タイヤ用
ゴムに一般的に配合されている各種配合剤を配合するこ
とができる。これらの補強剤および添加剤の配合量も、
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。[0012] The rubber composition for a pneumatic tire according to the present invention contains carbon black and / or silica which are usually added to the rubber composition for a tire . Furthermore, ordinary vulcanization or crosslinking agents, vulcanization or crosslinking accelerators, various oils, anti-aging agents, fillers, plasticizers, softeners, and other tires
Various compounding agents generally compounded in rubber can be compounded. The compounding amounts of these reinforcing agents and additives are also
As long as it does not violate the purpose of the present invention, a conventional general compounding amount can be used.
【００１３】本発明の空気入りタイヤ用ゴム組成物のお
ける熱膨張性可塑性樹脂粒子の混練および予備成形は、
膨張開始温度未満の温度、好ましくはその膨張開始温度
よりも１０℃以上低い温度、更に好ましくは、１５℃以
上低い温度で行われる。そうでないと、該熱膨張性樹脂
粒子がこの段階で一部膨張してしまい、次の工程で膨張
した粒子が潰れてしまうおそれがある。混練および予備
成形後は、その予備成形物をその中に含まれる熱膨張性
樹脂粒子が膨張開始温度以上になる温度で加熱成形する
ことにより熱膨張性樹脂粒子を膨張させて気体封入熱可
塑性樹脂となす。この時の加熱成形温度は、充分な膨張
を達成すると共にゴム材の最適の物性が得られるよう
に、熱膨張性樹脂粒子の最大膨張温度の±２０℃（好ま
しくは、±１５℃）の範囲内の温度で行なうとよい。な
お、前記加熱時にマトリックスを構成するゴム成分は加
硫されて硬化する。また、熱膨張性樹脂粒子が膨張して
気体封入熱可塑性樹脂粒子となっても、膨張の前後でそ
れ自身の重量は僅かしか変化しない。The kneading and preforming of the thermally expandable plastic resin particles in the rubber composition for a pneumatic tire of the present invention are as follows.
The reaction is performed at a temperature lower than the expansion start temperature, preferably at a temperature lower by at least 10 ° C. than the expansion start temperature, more preferably at a temperature lower by at least 15 ° C. Otherwise, the thermally expandable resin particles may partially expand at this stage, and the particles expanded in the next step may be crushed. After kneading and pre-molding, the pre-molded product is heat-molded at a temperature at which the thermally expandable resin particles contained therein are at or above the expansion start temperature to expand the thermally expandable resin particles, thereby forming a gas-filled thermoplastic resin. And The heat molding temperature at this time is in the range of ± 20 ° C. (preferably ± 15 ° C.) of the maximum expansion temperature of the heat-expandable resin particles so that sufficient expansion can be achieved and optimum physical properties of the rubber material can be obtained. It is good to carry out at the temperature within. At the time of the heating, the rubber component constituting the matrix is vulcanized and cured. Further, even if the thermally expandable resin particles expand into gas-filled thermoplastic resin particles, the weight of the resin itself changes only slightly before and after the expansion.
【００１４】前記の加熱加硫成形によって、加硫ゴムか
らなるマトリックス中に粒径が５〜３００μｍのミクロ
の大きさの球穀状の気体封入熱可塑性樹脂粒子が三次元
的に均一に分散配置した構造のゴム成形物を得ることが
できる。By the above-mentioned heat vulcanization molding, spherical and gas-filled thermoplastic resin particles having a particle size of 5 to 300 μm and having a particle size of 5 to 300 μm are three-dimensionally and uniformly dispersed in a matrix made of vulcanized rubber. A rubber molded product having the above structure can be obtained.
【００１５】このようにして得られる構造のゴム成形物
は、その構造、物性から、これを空気入りタイヤのトレ
ッド部、サイド、ビードフィラーおよびアンダートレッ
ド等に用いる場合には、前記ゴムマトリックス中に分散
された気体封入熱可塑性樹脂粒子がゴム１００重量部に
対して１０〜３０重量部となるように配合されることが
必要である。そうすると、タイヤ全体の重量を一層軽く
し、また、その構造体自体が弾力性、柔軟性に富むもの
となるため、タイヤ走行時に生じる歪みにも追従し高い
耐久性を示す。When the rubber molded product thus obtained is used for a tread portion, a side, a bead filler, an undertread, and the like of a pneumatic tire due to its structure and physical properties, it is contained in the rubber matrix. It is necessary that the dispersed gas-filled thermoplastic resin particles be blended in an amount of 10 to 30 parts by weight based on 100 parts by weight of rubber. Then, the weight of the tire as a whole is further reduced, and the structure itself is rich in elasticity and flexibility, so that the tire follows the distortion generated during tire running and exhibits high durability.
【００１６】[0016]
【実施例】以下、実施例および比較例に従って本発明を
更に詳しく説明するが、本発明の技術的範囲をこれらの
実施例に限定するものでないことは言うまでもない。EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples, but it goes without saying that the technical scope of the present invention is not limited to these Examples.
【００１７】以下の実施例および比較例の各例の配合に
用いた配合成分は、以下の市販品を用いた。 天然ゴム：ＲＳＳ＃３ ＳＢＲ−１：ＮＩＰＯＬ１２２０（日本ゼオン） ＳＢＲ−２：ＮＩＰＯＬ１５０２（日本ゼオン） カーボンブラック：ＳＨＯＢＬＡＣＫ Ｎ３３４（昭和
キャボット） 劣化防止剤：ＳＡＮＴＯＦＬＥＸ ６ＰＰＤ（FLEXSIS
社） 酸化亜鉛３号：（正同化学工業） ステアリン酸：（日本油脂） アロマオイル：（富士興産） 加硫促進剤：ＳＡＮＴＯＣＵＲＥ ＮＳ（FLEXSIS 社） 硫黄：（軽井沢精錬所） シラスバルーン：（シラス社） 既膨張粒子：ＥＸＰＡＮＣＥＬ０９１ＤＥ−８０（EXPA
NCEL社） 未膨張粒子−１：ＥＸＰＡＮＣＥＬ０９１ＤＵ−８０
（EXPANCEL社） 未膨張粒子−２：マツモトマイクロスフェアーＦ−１０
０（松本油脂）The following commercially available products were used for the components used in the following Examples and Comparative Examples. Natural rubber: RSS # 3 SBR-1: NIPOL1220 (Nippon Zeon) SBR-2: NIPOL1502 (Nippon Zeon) Carbon black: SHOBLACK N334 (Showa Cabot) Deterioration inhibitor: SANTOFLEX 6PPD (FLEXSIS)
Zinc oxide No. 3: (Shodo Chemical) Stearic acid: (Nippon Yushi) Aroma oil: (Fuji Kosan) Vulcanization accelerator: SANTOCURE NS (FLEXSIS) Sulfur: (Karuizawa Refinery) Shirasu balloon: (Shirasu Pre-expanded particles: EXPANCEL091DE-80 (EXPA
NCEL) Unexpanded particle-1: EXPANCEL091DU-80
(EXPANCEL) Unexpanded particles-2: Matsumoto Microsphere F-10
0 (Matsumoto oil and fat)
【００１８】サンプルの調製 １．７Ｌ密閉式バンバリーミキサーを用いて、ゴム、カ
ーボンブラック等の配合剤を５分間混合した後、オープ
ンロールにて、加硫促進剤、硫黄（比較例１および３の
場合は、これらのみ配合）とエクスパンセル（実施例）
またはシラスバルーン（比較例２の場合）を配合、混練
してゴム組成物を得た。次にこのゴム組成物を、１０MP
a の圧力の下で１６０℃で２０分間加硫して、２mm厚の
シートを作成し、硬さ（Hs）、比重および耐久性の試験
に供した。 Preparation of Samples Using a 1.7 L closed type Banbury mixer, a compounding agent such as rubber and carbon black was mixed for 5 minutes, and then a vulcanization accelerator and sulfur (comparative examples 1 and 3) were mixed with an open roll. In case, only these are blended) and Expancel (Example)
Alternatively, a shirasu balloon (in the case of Comparative Example 2) was blended and kneaded to obtain a rubber composition. Next, this rubber composition is
A 2 mm thick sheet was prepared by vulcanizing at 160 ° C. for 20 minutes under the pressure of a and subjected to hardness (Hs), specific gravity and durability tests.
【００１９】各例に適用された以下の試験方法は、次の
とおりである。 １）硬さ（Hs）：ＪＩＳＫ６３０１の５．２（スプリン
グ硬さ、Ａ型）に準拠して測定。 ２）比重：ＪＩＳＫ００６１の４．４（天秤法）に準拠
して測定。 ３）耐久性：ＪＩＳＫ６３０１の１５（屈曲試験）に準
拠して測定。１００，０００回屈曲後のき裂長さを測
定。The following test methods applied to each example are as follows. 1) Hardness (Hs): Measured in accordance with JIS K6301 5.2 (spring hardness, A type). 2) Specific gravity: Measured in accordance with JIS K0061 4.4 (balance method). 3) Durability: Measured in accordance with JIS K6301 15 (bending test). Measure crack length after 100,000 bendings.
【００２０】実施例１〜５および比較例１〜３ これらの例は、天然ゴムとＳＢＲ−１系のゴム、または
ＳＢＲ−２系のゴムに対して前記の既膨張粒子（ＥＸＰ
ＡＮＣＥＬ０９１ＤＥ−８０）、未膨張粒子−１または
２（ＥＸＰＡＮＣＥＬ０９１ＤＵ−８０、またはマツモ
トマイクロスフェアーＦ−１００）を配合したゴム組成
物についての評価結果を示すものである。結果を表Ｉに
示す。 Examples 1 to 5 and Comparative Examples 1 to 3 These examples are based on natural rubber and SBR-1 rubber or SBR-2 rubber against the above-mentioned expanded particles (EXP).
1 shows the evaluation results of a rubber composition containing ANCEL091DE-80), unexpanded particles-1 or 2 (EXPANCEL091DU-80, or Matsumoto Microsphere F-100). The results are shown in Table I.
【００２１】[0021]
【表１】 [Table 1]
【００２２】[0022]
【発明の効果】本発明に従ったゴム組成物は、軽量で弾
力性、柔軟性に富み、これをタイヤに使用した場合に
は、従来の無機系のシラスバルーンを用いたものに比し
て、軽量で、弾力性、柔軟性に富み、かつ耐久性の点で
も優れていることがわかる。The rubber composition according to the present invention is lightweight, resilient, and flexible, and when used in tires, has a greater effect than conventional inorganic shirasu balloons. It can be seen that it is lightweight, rich in elasticity, flexibility and excellent in durability.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平８−303524（ＪＰ，Ａ) 特開 平４−198241（ＪＰ，Ａ) 特公 平４−46979（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.7，ＤＢ名) C08L 21/00 B60C 1/00 C08K 7/22 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-8-303524 (JP, A) JP-A-4-198241 (JP, A) JP-B-4-46979 (JP, B2) (58) Field (Int.Cl. 7 , DB name) C08L 21/00 B60C 1/00 C08K 7/22
Claims (2)
体を発生する液体あるいは固体を封入した熱可塑性樹脂Thermoplastic resin encapsulating liquid or solid that generates body
粒子をゴム加硫時の熱によって熱膨張させた気体封入熱Gas-encapsulated heat in which particles are thermally expanded by heat during rubber vulcanization
可塑性樹脂粒子であって、その膨張開始温度が１２０℃A thermoplastic resin particle having an expansion start temperature of 120 ° C.
以上で、かつ最大膨張温度がタイヤの加熱成形温度に対Above, and the maximum expansion temperature is
して±２０℃の範囲内にあり、該膨張して中空状となしIs within the range of ± 20 ° C.
た真比重０.１以下、粒径５〜３００μｍの弾力性のあWith a specific gravity of 0.1 or less and a particle size of 5 to 300 μm
る未架橋の気体封入熱可塑性樹脂粒子を、ゴム１００重Uncrosslinked gas-filled thermoplastic resin particles
量部に対して１０〜３０重量部配合したゴム組成物をタA rubber composition blended in an amount of 10 to 30 parts by weight with respect to
イヤの構成部材に用いた空気入りタイヤ。A pneumatic tire used as a component of the ear.
アンダートレッドおよびビードフィラーのいずれか一方Either under tread or bead filler
あるいは両方に用いた、空気入りタイヤ。Or a pneumatic tire used for both.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12888997A JP3305230B2 (en) | 1997-05-19 | 1997-05-19 | Rubber composition and pneumatic tire using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12888997A JP3305230B2 (en) | 1997-05-19 | 1997-05-19 | Rubber composition and pneumatic tire using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10316801A JPH10316801A (en) | 1998-12-02 |
| JP3305230B2 true JP3305230B2 (en) | 2002-07-22 |
Family
ID=14995865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12888997A Expired - Fee Related JP3305230B2 (en) | 1997-05-19 | 1997-05-19 | Rubber composition and pneumatic tire using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3305230B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3055622B2 (en) | 1998-11-27 | 2000-06-26 | 横浜ゴム株式会社 | Rubber composition for tire tread with improved performance on ice and pneumatic tire using the same |
| KR100533266B1 (en) * | 2002-05-24 | 2005-12-05 | 한국타이어 주식회사 | Tire tread rubber composition |
| CN101412821B (en) | 2007-10-17 | 2012-08-08 | 横滨橡胶株式会社 | Rubber composition for tire |
| JP4289508B1 (en) | 2008-02-13 | 2009-07-01 | 横浜ゴム株式会社 | Pneumatic tire |
| FR2939141B1 (en) * | 2008-12-03 | 2012-12-14 | Michelin Soc Tech | PNEUMATIC OBJECT WITH GAS SEALING LAYER BASED ON THERMOPLASTIC ELASTOMER AND EXPANDED THERMOPLASTIC MICROSPHERES |
-
1997
- 1997-05-19 JP JP12888997A patent/JP3305230B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10316801A (en) | 1998-12-02 |
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