公开(公告)号：US11780994B2

公开(公告)日：2023-10-10

申请号：US17282557

申请日：2019-10-04

Applicant: BRIDGESTONE CORPORATION

Inventor： Kenji Nakatani ,  Kentaro Kumaki

IPC: C08L9/06 ,  C08L7/00 ,  C08L15/00 ,  B60C1/00 ,  C08C19/25 ,  C08F136/06 ,  C08F136/08 ,  C08K3/04 ,  C08K3/36

CPC classification number: C08L9/06 ,  B60C1/0016 ,  C08C19/25 ,  C08F136/06 ,  C08F136/08 ,  C08K3/04 ,  C08K3/36 ,  C08L7/00 ,  C08L15/00 ,  C08L2205/025 ,  C08L2205/035 ,  C08L2205/08

Abstract: To provide a rubber composition in which wet performance, wear resistance, low rolling resistance, and breaking resistance are highly balanced. A rubber composition comprising a rubber component comprising at least three polymers and a filler, wherein the rubber component is separated into at least two polymer phases: a polymer phase (1) with the highest tan δ peak temperature; and a polymer phase (2) with the lowest peak temperature; the polymer phases (1) and (2) are incompatible with each other; the polymer phase (1) at least comprises the modified conjugated diene-based polymers (A1) and (A2), and the filler; the modified conjugated diene-based polymer (A1) has a particular weight-average molecular weight and a particular contracting factor (g′); and when a filler concentration and an average aggregate area of the filler in the polymer phase (1) are defined as X and Y, respectively, an formula (1): Y

公开(公告)号：US09394321B2

公开(公告)日：2016-07-19

申请号：US14547316

申请日：2014-11-19

Applicant: BRIDGESTONE CORPORATION

Inventor： Kenji Nakatani ,  Yuki Itoh

IPC: C08C19/25 ,  C07F7/18 ,  B60C1/00 ,  C08L15/00 ,  C08C19/44

CPC classification number: C07F7/1888 ,  B60C1/0016 ,  C07F7/1876 ,  C08C19/25 ,  C08C19/44 ,  C08L15/00

Abstract: Provided are a modifying agent obtained by subjecting a silicon-containing compound having a protected primary amino group and at least two hydrolyzable groups to complete condensation, a method of producing a modified conjugated diene-based polymer, a modified conjugated diene-based polymer obtained by the production method, a rubber composition using the polymer, and a pneumatic tire. The modified conjugated diene-based polymer has excellent low heat generating property and abrasion resistance, and the rubber composition is obtained by using the modified conjugated diene-based polymer and the pneumatic tire is obtained by using the rubber composition.

Abstract translation: 提供了通过使具有被保护的伯氨基和至少两个可水解基团的含硅化合物进行缩合而得到的改性剂，改性共轭二烯系聚合物的制造方法，改性共轭二烯系聚合物 该制造方法，使用该聚合物的橡胶组合物和充气轮胎。 改性共轭二烯类聚合物具有优异的低发热性和耐磨性，通过使用改性共轭二烯系聚合物得到橡胶组合物，通过使用橡胶组合物得到充气轮胎。

公开(公告)号：US10518581B2

公开(公告)日：2019-12-31

申请号：US15572578

申请日：2016-05-16

Applicant: BRIDGESTONE CORPORATION

Inventor： Tomoki Higa ,  Kenji Nakatani

IPC: B60C1/00 ,  C08L9/06 ,  C08L15/00 ,  C08K3/36 ,  C08L21/00 ,  B60C11/00

Abstract: The rubber composition of this disclosure is a rubber composition comprising a rubber component containing 2 or more polymer components and a filler containing at least a silica, wherein: the rubber component is separated into two or more polymer phases with different peak temperatures of tan δ temperature dispersion curve; a compounding amount of the filler per 100 parts by mass of the rubber component is 30 to 130 parts by mass; 30 mass % or more of the filler exists in the polymer phase with the lowest peak temperature of tan δ temperature dispersion curve; and the filler has an average aggregate area of 2100 nm2 or less.