Sumitomo Rubber Industries Limited

Kao Corporation

Other

Nitto-denko Corporation

Fuji Latex Co., Ltd.

Sumitomo Electric Industries, Limited

Sanko Chemical Industry Co., Ltd.

Sri Sports Limited

Toshiaki Sakaki

Naoya Ichikawa

Tetsuo Mizoguchi

Takayuki Hattori

Masaharu Hayashi

Atsuko Kawasaki

Yasuyuki Tanaka

Yuka Yokoyama

Shinichi Nakade

Yuichi Hioki

Katsumi Terakawa

Eiji Kanamaru

Kenichi Uesaka

Yoshiharu Tatsukami

Kazuhiko Shibata

Hiromasa Okubo

Takefumi Nakashita

Lucksanaporn Tarachiwin

Noriaki Fujihana

Yoshiharu Inui

Chee-Cheong Ho

Choong Dick Hean

Daijiro Toji

Shinichi Hori

Miyo Miki

Masako Iwamoto

Tatsuya Miyazaki

Yasuhisa Minagawa

Kiyoshige Muraoka

Takao Wada

Kazuyuki Nishioka

Noriko Yagi

Hideyuki Okuyama

Ryo Mashita

Sadahiko Matsumura

Ai Matsuura

Yumi Kanemitsu

Kazuo Kadomaru

Sumiko Miyazaki

Masanobu Nakamura

Atsuko Ochi

Noboru Uenishi

Hirotoshi Otsuki

Akira Minagoshi

Hathainat Kum-Ourm

Kazuhiro Sekiguchi

Toshihiko Takiguchi

Kamalin Kanyawararak

Seiji Hatano

Hitoshi Takii

Shinji Kikuhara

Akihito Kuga

Gan Seng Neon

Lee Siang Yin

Tetsuo Nishikawa

Kazuo Haruta

Toshinori Sakamaki

Kamolchat Charungchitaree

Tomohiro Hosokawa

Hitoshi 1-3 1-Chome Shimaya Takii

Toshihiko 1-3 1-Chome Shimaya Takiguchi

The present invention provides a modified natural rubber having a good balance of improved fuel economy, heat-aging resistance, processability, and breaking resistance, and a method for producing such a rubber. The present invention also provides a tire rubber composition and a pneumatic tire which are prepared using the modified natural rubber. The present invention relates to a highly purified, modified natural rubber whose pH is adjusted to 2 to 7.

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

Provided are a rubber composition for tires that shows a balanced improvement in properties such as fuel economy, processability, heat aging resistance, abrasion resistance, wet-grip performance, performance on snow and ice, and handling stability, and a pneumatic tire formed from the rubber composition. The present invention relates to a rubber composition for tires, containing: a highly purified, modified natural rubber having a pH adjusted to 2-7; carbon black and/or a white filler; and a styrene-butadiene rubber having a styrene content of 30% by mass or more, and also relates to a pneumatic tire formed from the rubber composition.

Rubber composition for tires and pneumatic tire

Provided are pneumatic tires or studless winter tires that achieve a balanced improvement in fuel economy, reinforcing properties (flex crack growth resistance, abrasion resistance, tensile strength, adhesive strength, resistance to air permeation), grip performance (wet-grip performance, performance on snow and ice), handling stability, and heat aging resistance, and methods for producing such a pneumatic tire or studless winter tire. The present invention relates to a pneumatic tire including at least one component selected from the group consisting of a sidewall, a base tread, a bead apex, a clinch apex, an innerliner, and an undertread, each of which is formed from a rubber composition that contains a highly purified, modified natural rubber whose pH is adjusted to 2 to 7, and carbon black and/or a white filler.

Pneumatic tire, studless tire, method for manufacturing pneumatic tire, and method for manufacturing studless tire

Provided are a rubber composition for tires that shows a balanced improvement in properties such as fuel economy, processability, heat aging resistance, abrasion resistance, wet-grip performance, performance on snow and ice, and handling stability, and a pneumatic tire formed from the rubber composition. The present invention relates to a rubber composition for tires, containing: a highly purified, modified natural rubber having a pH adjusted to 2 to 7, and a silica having a CTAB specific surface area of 180 m/g or more and a BET specific surface area of 185 m/g or more, and also relates to a pneumatic tire formed from the rubber composition.

Provided are a rubber composition for tires that shows a balanced improvement in properties such as fuel economy, processability, heat aging resistance, abrasion resistance, wet-grip performance, performance on snow and ice, and handling stability, and a pneumatic tire formed from the rubber composition. The present invention relates to a rubber composition for tires, containing: a highly purified, modified natural rubber having a pH adjusted to 2-7; carbon black and/or a white filler; and a silane coupling agent represented by the following Formula (S1): wherein Rrepresents a monovalent group selected from &#x2014;Cl, &#x2014;Br, &#x2014;OR, &#x2014;O(O&#x2550;)CR, &#x2014;ON&#x2550;CRR, &#x2014;ON&#x2550;CRR, &#x2014;NRR, and &#x2014;(OSiRR)(OSiRRR), wherein R, R, and Rare the same as or different from one another and each represent a hydrogen atom or a C1-C18 monovalent hydrocarbon group, and h represents a number whose average value is 1 to 4; Rrepresents R, a hydrogen atom, or a C1-C18 monovalent hydrocarbon group; Rrepresents R, R, a hydrogen atom, or the group: &#x2014;[O(RO)]&#x2014; wherein Rrepresents a C1-C18 alkylene group, and j represents an integer of 1 to 4; Rrepresents a C1-C18 divalent hydrocarbon group; Rrepresents a C1-C18 monovalent hydrocarbon group; and x, y, and Z are numbers satisfying the following relationships: x+y+2z=3, 0&#x2266;x&#x2266;3, 0&#x2266;y&#x2266;2, and 0&#x2266;z&#x2266;1.

Provided are a method for producing a relatively uniformly epoxidized natural rubber in a simple and inexpensive manner, a rubber composition for tires that includes the epoxidized natural rubber, and a pneumatic tire formed from the rubber composition for tires. The present invention relates to a method for producing an epoxidized natural rubber, including: Step 1 of coagulating natural rubber latex into granules to prepare a granular solid rubber; and Step 2 of treating the granular solid rubber with an epoxidizing liquid to epoxidize the granular solid rubber.

Method for producing an epoxidized natural rubber, rubber composition for tires, and pneumatic tire

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 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 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.

Rubber composition for breaker and pneumatic tire

The present invention provides an oil extended rubber for a tire, which is obtained by a process for preparing an oil extended rubber for a tire, comprising: (a) a step of preparing an oil-in-water type emulsion by emulsifying a vegetable oil having an iodine value of not less than 135 with a surfactant; (b) a step of mixing said emulsion of vegetable oil and a modified natural rubber latex, and then maturing the mixture; and (c) a step of coagulating the mixture obtained in the step (b) to obtain a lump of a rubber.

Preparation process of oil extended rubber for tire, oil extended rubber for tire, and rubber composition and tire using the same

A rubber composition for a tire, in which a specific tackifier is compounded, and tackiness and various physical properties are improved, compared with compounding a petroleum resin or a terpene resin, is provided. The rubber composition for a tire comprising an alkyd resin and a pneumatic tire using the same. It is preferable that a material derived from a resource other than petroleum, particularly, a material derived from animal and/or vegetable, and more particularly, a material derived from an animal oil and/or a vegetable oil is contained in the alkyd resin, and it is preferable that unsaturated polybasic acid is contained in the alkyd resin.

Rubber composition for tire and pneumatic tire using the same

The present invention provides a process for preparing an oil extended rubber, in which an effect on environments can be taken into consideration, provision for the future decrease of petroleum supply can be satisfied, and further, strength is excellent without molecular breakage, an oil extended rubber obtained by the preparation process, and a tire using the oil extended rubber. A process for preparing an oil extended rubber, comprising (a) a step of preparing an oil-in-water type emulsion by emulsifying a vegetable oil having an iodine value of not less than 135 with a surfactant, (b) a step of mixing said emulsion and a modified natural rubber latex, and then aging the mixture, and (c) a step of coagulating the mixture obtained in the step (b) to obtain a lump of a rubber, an oil extended rubber obtained by the preparation process, and a rubber composition for a tire and a tire which use the oil extended rubber.

The present invention provides a shock absorber loaded in the inner cavity of a tire enclosed by a tire for a two-wheeler and a rim, which exhibits suitable hardness when starting running and is excellent in cushioning property, both when starting running and during running, due to decrease in hardness as the temperature increases while running. Specifically, the present invention relates to a shock absorber which is loaded in the inner cavity of a tire enclosed by a tire for a two-wheeler and a rim and contacts substantially with the entire inner surface of a tire to be compressed, is circular in the tire circumferential direction and has closed cells; the shock absorber comprising an expanded rubber composition containing at least 5 parts by weight of an organic polymer having a softening point of at least 40&#xb0; C., based on 100 parts by weight of a rubber component.

Shock absorber loaded in inner cavity of tire enclosed by tire for two-wheeler and rim

The present invention provides a polymeric-type antistatic agent containing a polymer composition consisting of a polymeric-type antistatic agent containing a resin or/and an elastomer as a main component thereof; or/and a thermoplastic resin having a polar group or/and an elastomer having the polar group. At least one kind of an anion-containing salt, having a fluoro group and a sulfonyl group, is added to the polymer composition without intermediary of a medium consisting of a low-molecular-weight polyether-containing compound or a low-molecular-weight polar compound whose number-average molecular weight is not more than 5000. The present invention also provides a composition, for a conductive roller or the like, containing polymer components and the polymeric-type antistatic agent dispersed in the polymer components.

Polymeric-type electric resistance control agent and polymer composition containing the same

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Kobe, Japan

Toshiaki Sakaki