To suppress iridescence color tone, while maintaining ozone resistance.SOLUTION: A color rubber composition for tires according to the embodiment contains 0.2 to 20 pts.mass of a pigment other than black and white, 0.5 to 15 pts.mass of petroleum wax, and 10 to 150 pts.mass of a white filler with respect to 100 pts.mass of the rubber component, wherein the petroleum wax has a normal/iso (mass ratio) of 70/30 to 90/10. A carbon number distribution (mass%) of the iso component in the entire petroleum wax is 1.0% or less with 25 or less carbon atoms, 4.0 to 8.0% with 26 to 32 carbon atoms, 5.0 to 15.0% with 33 to 44 carbon atoms, and 1.0% or more with 45 or more carbon atoms. The carbon number distribution (mass%) of the normal components in the entire petroleum wax is 5.0 to 18.0% for 25 or less carbon atoms, 40.0 to 48.0% for 26 to 32 carbon atoms, 15.0 to 27.5% for carbons 33 to 44, and 2.0% or more for carbon number 45 or more.SELECTED DRAWING: None
【課題】耐オゾン性を維持しつつ、色目変化を抑える。【解決手段】実施形態に係るタイヤ用カラーゴム組成物は、ゴム成分100質量部に対し、白黒以外の顔料0.2~20質量部と、石油ワックス0.5~15質量部と、白色充填剤10~150質量部と、を含む。石油ワックスは、ノルマル/イソ(質量比)が70/30~90/10である。石油ワックス全体に占めるイソ成分の炭素数分布(質量%)は、炭素数25以下が1.0%以下、炭素数26~32が4.0~8.0%、炭素数33~44が5.0~15.0%、炭素数45以上が1.0%以上である。石油ワックス全体に占めるノルマル成分の炭素数分布(質量%)は、炭素数25以下が5.0~18.0%、炭素数26~32が40.0~48.0%、炭素数33~44が15.0~27.5%、炭素数45以上が2.0%以上である。【選択図】なし
COLORING RUBBER COMPOSITION FOR TIRE AND TIRE
タイヤ用カラーゴム組成物及びタイヤ
20.01.2023
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 |
Europäisches Patentamt | 2021
|TIRE RUBBER COMPOSITION, TIRE RUBBER MEMBER, AND TIRE
Europäisches Patentamt | 2024
|Europäisches Patentamt | 2020
|Europäisches Patentamt | 2021
|TIRE RUBBER COMPOSITION, TIRE VULCANIZED RUBBER, TREAD RUBBER, AND TIRE
Europäisches Patentamt | 2025
|