公开(公告)号：US20240254319A1

公开(公告)日：2024-08-01

申请号：US18629913

申请日：2024-04-08

Applicant: Sumitomo Riko Company Limited

Inventor： Yuto Watanabe ,  Seiji Kasai ,  Akio MASE ,  Yuko MATSUSHITA

IPC: C08K13/02 ,  C08K3/36 ,  C08K5/47 ,  C08K5/5419 ,  F16F1/36

CPC classification number: C08K13/02 ,  F16F1/3605 ,  C08K3/36 ,  C08K5/47 ,  C08K5/5419 ,  F16F2224/025

Abstract: Provided are a vibration-damping rubber composition and a vibration-damping rubber member which have excellent durability, can attain a reduction in dynamic-to-static modulus ratio, and can exhibit excellent scorch resistance in wet-heat environments, etc. This vibration-damping rubber composition comprises a diene-based rubber composition including the following (A) to (C) and further containing the following (D) and (E), where the total amount of (D) and (E) is 1-5 parts by mass per 100 parts by mass of (A) and the mass ratio between (D) and (E) is (D):(E)=90:10 to 50:50: (A) a diene-based rubber; (B) silica; (C) a silane coupling agent; (D) N-oxydiethylene-2-benzothiazolylsulfenamide; and (E) Di-2-benzothiazolyl disulfide.

公开(公告)号：US20250026915A1

公开(公告)日：2025-01-23

申请号：US18907595

申请日：2024-10-07

Applicant: Sumitomo Riko Company Limited

Inventor： Yuto Watanabe ,  Seiji Kasai ,  Toyohisa Tohyama

IPC: C08K5/3415 ,  C08K3/013 ,  C08K3/04 ,  C08K3/36 ,  C08K5/47 ,  C08K11/00

Abstract: Provided are a vibration isolation rubber composition and a vibration isolation rubber member, which can suppress a decrease in durability while improving resistance to vulcanization reversion. The vibration isolation rubber composition contains components (A) to (E), and is characterized in that relative to 100 parts by mass of component (A), the content of component (B) is 0.6-5.5 parts by mass, the content of component (C) is 0.45-3.5 parts by mass, the content of component (D) is 0.25-5.5 parts by mass, and the mass ratio [(C)/(D)] of component (C) relative to component (D) is 0.15-5.0. (A) A diene-based rubber. (B) A bismaleimide compound. (C) A sulfenamide-based vulcanization accelerator. (D) A sulfur-based vulcanizing agent. (E) An inorganic filler.

公开(公告)号：US20240262985A1

公开(公告)日：2024-08-08

申请号：US18628842

申请日：2024-04-08

Applicant: Sumitomo Riko Company Limited

Inventor： Yuto Watanabe ,  Seiji Kasai ,  Toyohisa Tohyama

IPC: C08K5/548 ,  C08K3/04 ,  C08K3/36 ,  C08K9/06 ,  F16F1/36

CPC classification number: C08K5/548 ,  C08K3/04 ,  C08K3/36 ,  C08K9/06 ,  F16F1/3605 ,  C08K2201/005 ,  C08K2201/006 ,  F16F2224/025

Abstract: Provided are a vibration-damping rubber composition and a vibration-damping rubber member which have excellent durability, can attain a reduction in dynamic-to-static modulus ratio, and can exhibit excellent scorch resistance even in wet-heat environments, etc. This vibration-damping rubber composition comprises a diene-based rubber composition comprising the following (A) to (C). (A) A diene-based rubber. (B) Silica having a silanol group density of four groups per nm2 or greater, a BET specific surface area of 13-60 m2/g, and an average particle diameter of 3-10 μm. (C) A silane coupling agent having a sulfide group and a mercapto group in the molecule.