Title:
TIRE
Document Type and Number:
Japanese Patent JP2020100677
Kind Code:
A
Abstract:
To provide a tire capable of achieving, a wet performance, a wear resistance and a low rolling resistance at high level.SOLUTION: The invention relates to a tire with a tread part, the tire comprises: a base rubber; and a cap rubber provided on an external side of the base rubber in a tire radial direction. A storage elastic modulus E' at 25°C and tanδ at 50°C of the base rubber are smaller than a storage elastic modulus E' at 25°C and tanδ at 50°C of the cap rubber, the cap rubber comprises: a rubber component containing a polymer (A1), a polymer (A2), and a polymer (A3); and a silica containing a silica (B1) and a silica (B2), each of which is included by 1 mass part or greater with respect to 100 mass parts of the rubber component. When respective percentage contents (mass%) of the silica (B1) in the polymer (A1), the polymer (A2) and the polymer (A3) in the rubber component are X1, X2, X3, and respective percentage contents (mass%) of the silica (B2) in the polymer (A1), the polymer (A2) and the polymer (A3) in the rubber component are Y1, Y2, Y3, relationships of X2>X1>X3 and Y1>Y2>Y3 are satisfied.SELECTED DRAWING: None
Inventors:
HATANAKA AKITO
KUMAKI KENTARO
KUMAKI KENTARO
Application Number:
JP2018237772A
Publication Date:
July 02, 2020
Filing Date:
December 19, 2018
Export Citation:
Assignee:
BRIDGESTONE CORP
International Classes:
C08L15/00; B60C1/00; B60C11/00; C08C19/25; C08F236/10; C08J3/20; C08K3/04; C08K3/36; C08L9/00
Attorney, Agent or Firm:
Kenji Sugimura
Mitsutsugu Sugimura
Kazuyuki Tomita
Kengo Yoshida
Mitsutsugu Sugimura
Kazuyuki Tomita
Kengo Yoshida