PROBLEM TO BE SOLVED: To provide a tire where tear strength of vulcanizate generated from vulcanizate, especially a composition for tire is improved without sacrificing vulcanizate, tire constituent or mechanical and abrasion property and hysteresis property of tire.SOLUTION: There is provided a tire containing at least one constituent containing a vulcanized elastic polymer and polypropylene copolymer or propylene homopolymer of the amount of about 35 pts.wt. per 100 pts.wt. of the elastic polymer and expressing improved tear strength. There is provided a tire where the copolymer contains 1 to 30 wt.% of an ethylene monomer unit, some polyethylene crystal and has a weight average molecular weight (Mw) of 80000 to 500000 and the homopolymer has an isotactic fine structure and molecular weight distribution (Mw/Mn) of less than 4.5 in Mw of 80000 to 500000.
【課題】加硫ゴム、特にタイヤ用組成物から生じさせた加硫ゴムの引裂き強さを加硫ゴム、タイヤ構成要素またはタイヤの機械的及び摩耗特性並びにヒステリシス特性を犠牲にすることなく向上させたタイヤの提供。【解決手段】加硫を受けた弾性重合体と弾性重合体100重量部当たり約35重量部以下の量のポリプロピレンコポリマー又はプロピレンホモポリマーを含む構成要素を少なくとも1つ含んでいて向上した引裂き強さを示すタイヤ。前記コポリマーがエチレンモノマー単位を1〜30重量%含み、幾らかのポリエチレン結晶を含み、重量平均分子量(Mw)が80000〜500000であり、前記ホモポリマーがイソタクティック微細構造を有し、Mwが80000〜500000で、分子量分布(Mw/Mn)が4.5未満である、タイヤ【選択図】なし
TIRE STRUCTURAL ELEMENT HAVING IMPROVED TEAR STRENGTH
向上した引裂き強さを有するタイヤ構成要素
2015-07-02
Patent
Elektronische Ressource
Japanisch
IPC: | C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen / B60C VEHICLE TYRES , Fahrzeugreifen / C08K Verwendung von anorganischen oder nichtmakromolekularen organischen Stoffen als Zusatzstoffe , USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS |
ADDITIVE FOR IMPARTING TEAR STRENGTH TO RUBBER COMPONENT, RUBBER COMPOSITION AND TIRE
Europäisches Patentamt | 2020
|Tire tread rubber with tear resistance and all-steel radial tire
Europäisches Patentamt | 2021
|