公开(公告)号：JP2001348461A

公开(公告)日：2001-12-18

申请号：JP2000171879

申请日：2000-06-08

Applicant: BRIDGESTONE CORP

Inventor： SHIBATA TADASHI ,  IZUMIIKE MASAAKI ,  MAEYAMA YUKINORI ,  AKAISHI KOJI ,  YAMAUCHI KOJI

IPC: B60C1/00 ,  C08K3/04 ,  C08K3/36 ,  C08K5/39 ,  C08K5/47 ,  C08L9/06 ,  C08L45/00 ,  C08L91/00

Abstract: PROBLEM TO BE SOLVED: To provide a rubber composition which inhibits lowering of a lap time and exhibits improved heat resistance performances (blowout resistance performances) without lowering road surface gripping force (gripping performances) when running. SOLUTION: This rubber composition comprises 100 pts.wt. of a rubber component comprising a copolymer of a conjugated diene with a vinyl aromatic hydrocarbon at least 80 wt.% of which copolymer having a Mooney viscosity of at least 50 at 100 deg.C when oil-extended with 60 pts.wt. of an aromatic oil, 80-200 pts.wt. of carbon black, 50-250 pts.wt. of a softening agent, and 2.0-10 pts.wt. of a vulcanization accelerator represented by formula (1) or (2). In the chemical formulae, R1 and R2 are each independently a hydrogen atom or an alkyl or aryl group, provided that R1 and R2 are not both hydrogen.

公开(公告)号：JPH09235416A

公开(公告)日：1997-09-09

申请号：JP6512596

申请日：1996-02-28

Applicant: BRIDGESTONE CORP

Inventor： IWAFUNE SEIICHIRO ,  MATSUO KENJI ,  MAEYAMA YUKINORI ,  SAKIYAMA ATSUSHI

IPC: C08K5/00 ,  C08K5/33 ,  C08K5/40 ,  C08K5/44 ,  C08K5/5398 ,  C08L21/00

Abstract: PROBLEM TO BE SOLVED: To obtain a rubber composition which can give high-performance pneumatic tire treads improved in tread leaving belt resistance by using a vulcanization accelerator and a vulcanizing agent which are nondeleterious to the environment by using a specified compound. SOLUTION: This composition comprises a vulcanizable rubber, a non- nitrosoamine type vulcanization accelerator and a non-morpholine type vulcanizing agent. The composition preferably comprises 100 pts.wt. rubber component, 0.1-10 pts.wt. non-nitrosoamine type vulcanization accelerator and 0.1-10 pts.wt. active-sulfur-releasing type non-morpholine type vulcanizing agent. Desirable examples of the active-sulfur-releasing type non-morpholine vulcanizing agents used include dithiodicaprolactam, tetraethoxyphosphoryl trisulfide and blends thereof.

公开(公告)号：JPH07309975A

公开(公告)日：1995-11-28

申请号：JP10115394

申请日：1994-05-16

Applicant: BRIDGESTONE CORP

Inventor： TERATANI HIROYUKI ,  MAEYAMA YUKINORI

IPC: C08L7/00 ,  C08J3/22 ,  C08L9/00 ,  C08L21/00 ,  C08L23/00 ,  C08L77/00

Abstract: PURPOSE:To obtain a rubber composition being highly anisotropic and reduced in fatigue and heat buildup. CONSTITUTION:This composition is one comprising 100 pts.wt. at least one rubber component selected from the group consisting of a natural rubber and a synthetic diene rubber, 1-100 pts.wt. fiber made of a thermoplastic amide elastomer and 1-100 pts.wt. olefin resin, wherein the mixing ratio of the fiber made of the thermoplastic amide elastomer to the olefin resin is 3/7 to 7/3.

公开(公告)号：JPH07309974A

公开(公告)日：1995-11-28

申请号：JP10401294

申请日：1994-05-18

Applicant: BRIDGESTONE CORP

Inventor： TERATANI HIROYUKI ,  MAEYAMA YUKINORI

IPC: C08K5/09 ,  C08K5/04 ,  C08L7/00 ,  C08L9/00 ,  C08L21/00 ,  C08L23/02 ,  C08L77/00 ,  C08L77/04

Abstract: PURPOSE:To obtain a rubber composition being highly anisotropic and reduced in fatigue and heat buildup. CONSTITUTION:This composition is one comprising 100 pts.wt. at least one rubber component selected from the group consisting of a natural rubber and a synthetic diene rubber, 1-100 pts.wt. fiber made of a thermoplastic amide elastomer, 1-100 pts.wt. olefin resin and 1-10 pts.wt. unsaturated fatty acid having at least two C-C double bonds in the molecule, wherein the mixing ratio of the fiber made of the thermoplastic amide elastomer to the olefin resin is 3/7 to 7/3, and unsaturated fatty acid contains at least 10wt.% conjugated dienoic acid having at least one pair of conjugated double bonds in the molecule.