公开(公告)号：US20160001601A1

公开(公告)日：2016-01-07

申请号：US14767325

申请日：2014-02-28

Applicant: BRIDGESTONE CORPORATION

Inventor： Yuji OYAMA

IPC: B60C9/00 ,  B60C15/00 ,  C09J163/00 ,  B60C17/00

CPC classification number: B60C9/0042 ,  B60C15/0036 ,  B60C17/0009 ,  B60C2009/0071 ,  B60C2009/0475 ,  B60C2015/009 ,  B60C2015/061 ,  B60C2015/0614 ,  B60C2017/0054 ,  B60C2017/0072 ,  C09J163/00

Abstract: Provided is a pneumatic safety tire in which the durability is improved by improving the compression fatigue property of a carcass ply cord.The pneumatic safety tire includes, as a skeleton, a carcass, and a side reinforcing rubber. Provided that the area of the side reinforcing rubber is S1, the area of a bead filler is S2, and the area of a rubber chafer is S3, the following expressions (1) and (2) are satisfied: 0.10≦(S2+S3)/S1≦2.50  (1) 0≦S2/(S2+S3)≦0.9  (2), a reinforcing cord of a carcass ply is composed of a polyester fiber and/or an aramid fiber, and subjected to an adhesive agent treatment in which an adhesive agent containing at least one of a thermoplastic polymer, a heat reactive aqueous urethane resin, and an epoxide compound is used for a first bath, an RFL-based adhesive agent is used for a second bath, and a principal chain of the thermoplastic polymer substantially fails to include a double bond between carbons having an addition reactivity, is composed of an ethylene addition polymer and/or a urethane-based high molecular weight polymer, each of which is composed mostly of a linear chain structure, and includes a cross-linkable functional group as a pendant group.

Abstract translation: 提供一种气动安全轮胎，其中通过提高胎体帘布层帘线帘线的压缩疲劳性能来提高耐久性。 气动安全轮胎包括作为骨架的胎体和侧面增强橡胶。 如果侧面加强橡胶的面积为S1，则胎圈填料的面积为S2，橡胶胎圈包布的面积为S3，满足以下表达式（1）和（2）：0.10＆nlE;（S2 + S3）/S1＆nlE; 2.50（1）0＆nlE; S2 /（S2 + S3）＆nlE; 0.9（2），胎体帘布层的加强帘线由聚酯纤维和/或芳族聚酰胺纤维构成， 将含有热塑性聚合物，热反应性水性聚氨酯树脂和环氧化合物中的至少一种的粘合剂用于第一浴的试剂处理中，将RFL型粘合剂用于第二浴， 热塑性聚合物链基本上不能包含具有添加反应性的碳之间的双键，由乙烯加成聚合物和/或氨基甲酸酯基高分子量聚合物组成，其各自主要由直链结构组成， 并且包括可交联官能团作为侧基。

公开(公告)号：US20180037060A1

公开(公告)日：2018-02-08

申请号：US15554911

申请日：2016-03-07

Applicant: BRIDGESTONE CORPORATION

Inventor： Takeshi TSUBOTA ,  Yuji OYAMA

IPC: B60C1/00 ,  C08K3/04 ,  C08J3/24 ,  B60C17/00 ,  B60C9/00

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 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：US20170087938A1

公开(公告)日：2017-03-30

申请号：US15315462

申请日：2015-06-02

Applicant: BRIDGESTONE CORPORATION

Inventor： Yuji OYAMA ,  Shinsuke ISOE

IPC: B60C9/00 ,  B60C9/08

CPC classification number: B60C9/0042 ,  B60C9/08 ,  B60C2009/0425 ,  B60C2009/0466 ,  D02G3/48

Abstract: Provided is a pneumatic tire in which a cord including an aramid fiber is used for a reinforcing cord for a carcass ply, and the cut resistance, the steering stability, and the light-weightness are improved. Provided is a pneumatic tire 10 including a carcass 4 composed of at least one carcass ply as a skeleton, and a reinforcing cord of the carcass ply includes an aramid fiber, and the upper twist coefficient T represented by the following formula: T=N×√{(0.125×D/2)/ρ}×10−3 (in the formula, N represents the twist count (count/10 cm) of the cord, D represents the total fineness of the cord, and ρ represents the density of the cord) is 0.5 or higher, the total fineness is 1,800 dtex or lower, and the end count of the reinforcing cord in the carcass ply is 55 counts/5 cm or larger.

公开(公告)号：US20180016425A1

公开(公告)日：2018-01-18

申请号：US15554828

申请日：2016-03-07

Applicant: BRIDGESTONE CORPORATION

Inventor： Takeshi TSUBOTA ,  Yuji OYAMA

IPC: C08L15/00 ,  B60C9/00 ,  B60C15/06 ,  B60C17/00 ,  B60C1/00

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：US20180015791A1

公开(公告)日：2018-01-18

申请号：US15554794

申请日：2016-03-07

Applicant: BRIDGESTONE CORPORATION

Inventor： Takeshi TSUBOTA ,  Yuji OYAMA

IPC: B60C17/00 ,  C08L9/00 ,  B60C9/00 ,  B60C15/06 ,  C08L7/00 ,  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.