SOLUTION: The present invention provides a crosslinked foam for the reduction of tire noise attached to a tire tread inner surface or a rim portion of a pneumatic tire, the crosslinked foam comprising (A) ethylene α-olefin nonconjugated polyene copolymer and, based on the (A) copolymer 100 pts.mass, (B) filler 100-300 pts.mass and (C) softening material 20-100 pts.mass, with the sum of contents of (B) filler and (C) softening material being 200 pts.mass or more based on the (A) copolymer 100 pts.mass, an apparent density of 60 kg/mor less, and a water absorption of less than 200%.EFFECT: A crosslinked foam for the reduction of tire noise of the present invention can be produced at low cost, achieves light weight, and also has excellent weather resistance and moist heat resistance.SELECTED DRAWING: None
【解決手段】空気入りタイヤのタイヤトレッド内面またはリム部分に取り付けられるタイヤ騒音低減用架橋発泡体であって、(A)エチレン・α−オレフィン・非共役ポリエン共重合体と、該(A)共重合体100質量部に対し、(B)充填材100〜300質量部、および(C)軟化材20〜100質量部とを含み、かつ(B)充填材と(C)軟化材との含有量の和が前記(A)共重合体100質量部に対し200質量部以上であり、 見かけ密度が60kg/m3以下であり、吸水率が200%未満であるタイヤ騒音低減用架橋発泡体。【効果】本発明のタイヤ騒音低減用架橋発泡体は、低コストで製造でき、かつ軽量化が可能であり、さらに耐候性、耐湿熱性に優れる。【選択図】なし
CROSSLINKED FOAM FOR THE REDUCTION OF TIRE NOISE, AND PNEUMATIC TIRE
タイヤ騒音低減用の架橋発泡体、ならびに空気入りタイヤ
13.04.2017
Patent
Elektronische Ressource
Japanisch
IPC: | B60B VEHICLE WHEELS , Räder für Fahrzeuge / B60C VEHICLE TYRES , Fahrzeugreifen / C08J Verarbeitung , WORKING-UP / C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen / C08K Verwendung von anorganischen oder nichtmakromolekularen organischen Stoffen als Zusatzstoffe , USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS |