Title:
RUBBER COMPOSITION AND PNEUMATIC TIRE USING THE SAME
Document Type and Number:
Japanese Patent JP2023096996
Kind Code:
A
Abstract:
To provide a rubber composition capable of improving conflicting performances with regard to a rolling resistance and wet grip performance, and also to provide a pneumatic tire using the same.SOLUTION: A rubber composition includes silica in diene rubber. In the rubber composition, by using a pulse method NMR device with a solid echo method, each spin-spin relaxation time of an unvulcanized specimen composed of the diene rubber and a specimen obtained by vulcanizing the rubber composition is measured at 25°C, and a relaxation curve (free induction decay curve) obtained by the unvulcanized specimen is divided into two components of a component (S0) with shorter relaxation time and a component (L0) with longer relaxation time, and a relaxation curve (free induction decay curve) obtained by the vulcanized specimen is divided into two components of a component (S) with shorter relaxation time and a component (L) with longer relaxation time, then a weighted mean value (T0) of the relaxation time of the component (S0) and the relaxation time of the component (L0) and a relaxation time (TS) of the component (S) satisfy TS/T0≥0.26. A volume (VS) of the component (S) and a volume (VL) of the component (L) satisfy VS/VL≥0.26.SELECTED DRAWING: Figure 1
Inventors:
HIDA YUKI
ENDO TATSUYA
ENDO TATSUYA
Application Number:
JP2021213107A
Publication Date:
July 07, 2023
Filing Date:
December 27, 2021
Export Citation:
Assignee:
TOYO TIRE CORP
International Classes:
C08L9/00; B60C1/00; C08K3/36; C08K5/5419; C08K5/548
Attorney, Agent or Firm:
Masato Tsutada
Satoshi Nakamura
Katsuyuki Tomita
Yasuomi Arichika
Ryu Maezawa
Waterfowl Masahiro
Satoshi Nakamura
Katsuyuki Tomita
Yasuomi Arichika
Ryu Maezawa
Waterfowl Masahiro