公开(公告)号：US10590268B2

公开(公告)日：2020-03-17

申请号：US15554828

申请日：2016-03-07

Applicant: BRIDGESTONE CORPORATION

Inventor： Takeshi Tsubota ,  Yuji Oyama

IPC: B60C17/00 ,  C08L15/00 ,  C08L61/06 ,  C08K5/40 ,  B60C1/00 ,  C08C19/22 ,  C08L7/00 ,  C08C19/44 ,  C08K5/44 ,  C08K5/16 ,  B60C9/00 ,  B60C15/06 ,  C08K3/04

Abstract: The present invention provides: a rubber composition prepared by mixing 60 to 100 parts by mass of a filler (B), 0.9 to 2.4 parts by mass of a phenol resin (C), 0.07 to 0.2 parts by mass of a methylene donor (D), 1.5 to 2.1 parts by mass of a thiuram based vulcanization accelerating agent (E), and 3.2 to 4.5 parts by mass of a sulfenamide based vulcanization accelerating agent (F), based on 100 parts by mass of the rubber component comprising 20 to 80% by mass of a modified conjugated diene based polymer (A), allowing the ride comfort in normal running to be satisfied in parallel with improvement in the run flat durability (durability in run flat running); and a tire comprising at least one member selected from the group consisting of a side reinforcing rubber layer and a bead filler using the rubber composition.

公开(公告)号：US10589570B2

公开(公告)日：2020-03-17

申请号：US15554911

申请日：2016-03-07

Applicant: BRIDGESTONE CORPORATION

Inventor： Takeshi Tsubota ,  Yuji Oyama

IPC: B60C17/00 ,  B60C1/00 ,  B60C15/06 ,  C08L15/00 ,  C08K3/00 ,  C08K5/00 ,  C08C19/25 ,  B60C9/12 ,  B60C9/00 ,  C08J3/24 ,  C08K3/04 ,  C08K3/36 ,  C08K5/32 ,  C08L23/22

Abstract: The present invention provides a tire improved in the run flat durability, having at least one member selected from the group consisting of a side reinforcing rubber layer and a bead filler using a rubber composition comprising a rubber component containing 20% by mass or more of a modified conjugated diene based polymer, satisfying Expression (1) in terms of the elongation X under a stress of 6.5 MPa at 180° C. and the elongation Y under a stress of 6.5 MPa at 25° C. after vulcanization. 1.00≤X/Y≤1.15  (1)

公开(公告)号：US11613144B2

公开(公告)日：2023-03-28

申请号：US16643004

申请日：2018-08-31

Applicant: BRIDGESTONE CORPORATION

Inventor： Takeshi Tsubota

IPC: B60C1/00 ,  B60C3/02 ,  B60C9/02 ,  B60C17/08 ,  C08K3/36 ,  C08K5/00 ,  C08K5/40 ,  C08K5/435 ,  C08K5/5465 ,  C08L7/00 ,  C08L9/00 ,  C08L23/18 ,  C08L51/00 ,  C08L51/04

Abstract: Provided is a pneumatic tire having both improved run-flat durability and excellent wet grip properties; the pneumatic tire including a rubber composition used in a tread part, and a rubber support layer having a gauge thickness in a specified range; the rubber composition including specified compounded amounts of natural rubber, a terminal-modified styrene-butadiene rubber, silica, and a thermoplastic resin, wherein the rubber composition is largely strain-dependent for the storage elastic modulus.

公开(公告)号：US10589578B2

公开(公告)日：2020-03-17

申请号：US15554794

申请日：2016-03-07

Applicant: BRIDGESTONE CORPORATION

Inventor： Takeshi Tsubota ,  Yuji Oyama

IPC: B60C17/00 ,  C08L15/00 ,  C08L101/00 ,  C08C19/22 ,  B60C9/00 ,  B60C15/06 ,  C08L7/00 ,  C08L9/00 ,  B60C1/00

Abstract: The present invention provides a tire improved in the run flat durability, having at least one member selected from the group consisting of a side reinforcing rubber layer and a bead filler using a rubber composition having a tensile stress at 50% elongation at 180° C. (M50) of 6.2 MPa or more as a vulcanized rubber physical property.