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1. (WO2018101266) RUBBER COMPOSITION FOR TIRE AND TIRE

Pub. No.:    WO/2018/101266    International Application No.:    PCT/JP2017/042639
Publication Date: Fri Jun 08 01:59:59 CEST 2018 International Filing Date: Wed Nov 29 00:59:59 CET 2017
IPC: C08L 9/00
B60C 1/00
Applicants: SUMITOMO RUBBER INDUSTRIES, LTD.
住友ゴム工業株式会社
Inventors: MATSUMOTO, Norihiro
松本 典大
Title: RUBBER COMPOSITION FOR TIRE AND TIRE
Abstract:
The present invention provides a rubber composition for a tire, the rubber composition having a small tanδ at a temperature around 60°C, and excellent fracture energy at a temperature around 25°C. The present invention relates to a rubber composition for a tire, the rubber composition comprising a rubber component containing an isoprene-based rubber, wherein the correlation length Ξb, which is obtained by curve fitting, with formulas 1 to 6, a scattering intensity curve I(q) obtained from an X-ray scattering measurement or a neutron scattering measurement, is 55 nm or less. A, B, C, ξ, Ξb, Ξc: fitting parameters q: scattering vector Na: the number of scatterers having a correlation length of ξ per unit volume (the number of scatterers/cm3) Nb: the number of scatterers having a correlation length of Ξb per unit volume (the number of scatterers/cm3) Nc: the number of scatterers having a correlation length of Ξc per unit volume (the number of scatterers/cm3) δ: difference in electron density between scatterers and a surrounding matrix (electron·(cm-3)), or difference in scattering length density between scatterers and a surrounding deuterated solvent (cm-2) θ: scattering angle λ: wavelength of X ray or neutron ray