Toyo Tire Rubber Co., Ltd.

Riichiro Ohara

Satoshi Iwama

Hiroshi Takino

Makoto Komai

Eiji Ida

Noriyuki Isobe

Yuji Yamaguchi

Koji Hiramatsu

Rinichi Nakayama

Kenji Komamizu

Hiroyuki Tobori

The present invention provides a rubber composition containing a leather powder or gelatin powder, and a tire having a tread prepared from the rubber composition.

Rubber composition

A tire tread rubber composition having a two-peak tan.delta. characterized in that the temperature distribution curve for loss tangent (tan.delta.) has two peaks in the range from -120.degree. C. to +100.degree. C. is useful as a tire tread rubber composition.

Tire tread rubber composition and tire for passenger car

A rubber composition comprising 40 to 100 parts by weight of carbon black per 100 parts by weight of a rubber component,

Rubber composition for tire tread

A tire tread rubber composition exhibiting outstanding dynamic behavior and characterized in that the composition comprises as a rubber component at least 30 wt. % of an elastic styrene-butadiene copolymer prepared by solution polymerization with use of a lithium-base catalyst, the copolymer being higher than -60.degree. C. in glass transition temperature (T g) and at least 40.degree. C. in the peak mesial width of tan .delta. determined from the temperature range between the two points of intersection of the curve of tan .delta. with the line of tan .delta.=1/2a wherein a is the peak value of tan .delta. determined from a temperature-tan .delta. dispersion curve.

Rubber composition for tire treads

Growing community of inventors

Suita, Japan

Riichiro Ohara