Sumitomo Rubber Industries Limited

Other

Kao Corporation

Yamagata University

Naoya Ichikawa

Toshiaki Sakaki

Takayuki Hattori

Yuichi Hioki

Masaharu Hayashi

Akihiko Hamada

Yasuyuki Tanaka

Yoshiaki Miyamoto

Takaaki Ishida

Hiroyuki Nakagawa

Takao Wada

Isamu Tsumori

Yukio Isobe

Masako Iwamoto

Chee-Cheong Ho

Choong Dick Hean

Yukino Miyagi

Norimasa Ohya

Hiroyuki Yano

Katsumi Terakawa

Yoshihide Kojima

Ai Matsuura

Takafumi Taguchi

Masahiro Kishida

Sumiko Miyazaki

Kohei Takemura

Lucksanaporn Tarachiwin

Kamalin Kanyawararak

Yoshihiro Kagawa

Tomohiro Hosokawa

Gan Seng Neon

Lee Siang Yin

The present invention provides a tire puncture sealant which exhibits excellent storage stability while having reduced low-temperature viscosity and therefore improved low-temperature injection properties, and also exhibits excellent initial sealing properties and sealing force retention properties. The present invention relates to a tire puncture sealant containing rubber latex and 1,3-propanediol, the 1,3-propanediol being present in a proportion of 55 to% by mass of the liquid component.

Puncture sealing agent

The invention relates to an isoprene oligomer that contains a trans structural moiety and a cis structural moiety, which can be represented by the following formula (1), wherein at least 1 atom or group in the trans structural moiety is replaced by another atom or group. The invention also relates to a polyisoprene, which is biosynthesized using the isoprene oligomer and isopentenyl diphosphate. Further, this invention provides a rubber composition comprising the isoprene oligomer and/or the polyisoprene, and a pneumatic tire, including tire components (e.g., treads and sidewalls) formed from the rubber composition. wherein n represents an integer from 1 to 10; m represents an integer from 1 to 30; and Y represents a hydroxy group, a formyl group, a carboxy group, an ester group, a carbonyl group, or a group represented by the following formula (2): 

Isoprene oligomer, polyisoprene, processes for producing these materials, rubber composition, and pneumatic tire

Provided is a tire puncture sealant having improved puncture sealing performance while showing excellent storage stability. The present invention relates to a tire puncture sealant including: rubber latex, a tackifying resin emulsion, and a rosin acid surfactant.

The present invention provides rubber compositions for tires which are capable of improving handling stability, fuel efficiency, and processability while sufficiently reducing the dependence on petroleum resources, and pneumatic tires including tire components (e.g. bead apex) formed from the rubber compositions for tires. The present invention relates to rubber compositions for tires, containing a rubber component and a naturally derived phenolic resin.

Rubber composition for tires and pneumatic tire

The present invention provides a rubber composition for an undertread, which has improved in processability, fuel economy, and tensile properties in a balanced manner, and also provides a pneumatic tire formed from the rubber composition. The present invention relates to a rubber composition for an undertread, including: a rubber component containing a modified natural rubber having a phosphorus content of 200 ppm or less; and carbon black and/or a white filler, wherein the modified natural rubber is contained in an amount of 5% by mass or more per 100% by mass of the rubber component.

Rubber composition for undertread, and pneumatic tire

The present invention provides a puncture sealant for tires capable of achieving improved injectability while having excellent initial sealing performance and seal retention performance. The puncture sealant includes rubber latex, a tackifier, an antifreezing agent, and a thixotropy-imparting agent.

The present invention provides a modified natural rubber having a reduced tan &#x3b4;, a method for producing the modified natural rubber, a rubber composition produced using the modified natural rubber, and a pneumatic tire produced using the rubber composition. The present invention also provides a modified natural rubber having a reduced tan &#x3b4;, a method for producing the modified natural rubber, a rubber composition produced using the modified natural rubber and achieving good fuel economy and abrasion resistance at the same time, and a pneumatic tire produced using the rubber composition. The present invention relates to a modified natural rubber having a phosphorus content of 200 ppm or less and a total content of sodium and potassium of 350 ppm or less. The invention also relates to a modified natural rubber having a phosphorus content of 200 ppm or less and a nitrogen content of 0.2% by mass or less.

Modified natural rubber, method for producing same, rubber composition, and pneumatic tire

The present invention provides a rubber composition for a clinch apex which improves in fuel economy, flex crack growth resistance, and processability in a balanced manner, and also provides a pneumatic tire produced using the rubber composition. The present invention relates to a rubber composition for a clinch apex, including: a modified natural rubber having a phosphorus content of 200 ppm or less; and at least one of carbon black and a white filler.

Rubber composition for clinch apex and pneumatic tire

The present invention provides a rubber composition for a tread which enables improvement in fuel economy, breaking performance, and abrasion resistance in a balanced manner; a method for producing the rubber composition; and a heavy-load tire. The present invention relates to a rubber composition for a tread of a heavy-load tire, including a modified natural rubber having a phosphorus content of 200 ppm or less, and carbon black.

Rubber composition for tread, method for producing the same, and heavy-load tire

A rubber composition for a tire, and a pneumatic tire are provided in which the fuel economy, abrasion resistance, and deterioration resistance can be improved in a good balance. The present invention relates to a rubber composition for a tire, containing a rubber component that contains: a modified natural rubber having a phosphorus content of not more than 200 ppm; and butadiene rubber, wherein 60 to 95% by mass of the modified natural rubber and 5 to 40% by mass of the butadiene rubber are contained based on 100% by mass of the rubber component.

Rubber composition for tire, and pneumatic tire

The present invention provides a modified natural rubber which simultaneously achieves good fuel economy and good heat-aging resistance, and the production method thereof. The present invention also provides a tire rubber composition and a pneumatic tire which are produced using the modified natural rubber. The present invention relates to a modified natural rubber which is obtainable by treating a rubber coagulated from a saponified natural rubber latex, with a basic compound and then with an acidic compound.

Modified natural rubber, production method thereof, tire rubber composition, and pneumatic tire

The present invention relates to a natural rubber that contains 200 ppm or less of phosphorus.

Natural rubber and method for producing the same, rubber composition and pneumatic tire using the same, modified natural rubber and method for producing the same, and rubber composition for tread or for covering carcass cord and pneumatic tire using the same

The invention aims to provide a rubber composition for a tire which achieves a balanced improvement in the abrasion resistance under both low and high severity abrasion conditions, low heat build-up properties, and chipping resistance. The invention relates to a rubber composition for a tire, including: a rubber component containing 60% by mass or more of a natural rubber component; and a carbon black having a cetyltrimethylammonium bromide (CTAB) specific surface area of 140-160 m/g, a ratio (CTAB/IA) of the cetyltrimethylammonium bromide specific surface area to an iodine adsorption number (IA) of 0.85-1 m/g, and a ratio (&#x394;D50/Dst) of a half width (&#x394;D50) of Stokes' diameter distribution of aggregates to a Stokes' diameter (Dst) of aggregates, as determined by a centrifugal sedimentation method, of 0.9-0.99, the natural rubber component containing 20% by mass or more of highly purified natural rubber per 100% by mass of the natural rubber component.

The present invention provides a rubber composition for a breaker, which achieves both good fuel economy and good breaking performance while simultaneously having excellent processability, and a pneumatic tire including a breaker produced using the rubber composition. The present invention relates to a rubber composition for a breaker, including: a rubber component that contains a modified natural rubber, the rubber having a phosphorus content of 200 ppm or less; and carbon black and/or a white filler, wherein the rubber composition contains 5% by mass or more of the modified natural rubber based on 100% by mass of the rubber component.

Growing community of inventors

Kobe, Japan

Naoya Ichikawa