Patent application number | Description | Published |
20090018272 | Rubber composition and studless tire obtained by using the rubber composition - The object of the present invention is to provide a rubber composition suitable for a studless tire, which can inhibit rubber hardness increase with time and reveals excellent performance on ice and snow for a long time. The present invention relates to a rubber composition comprising 1 to 60 parts by weight of hydrogenised liquid polybutadiene based on 100 parts by weight of a rubber component containing at least 80% by weight of a natural rubber and a butadiene rubber, wherein a peak temperature of tan δ is at most 45° C. and rubber hardness at 0° C. is at most 64. | 01-15-2009 |
20100051153 | RUBBER COMPOSITION FOR STUDLESS TIRE AND STUDLESS TIRE USING THE SAME - The present invention has its object to provide a high performance studless tire, which has both good braking force and high handling stability on ice or snow, at higher productivity and at a lower price for customers. The studless tire comprises a tread made of a rubber composition that contains 0.5 to 5.0 parts by mass of a fatty acid and/or a derivative of the fatty acid per 100 parts by mass of a rubber component. | 03-04-2010 |
20100056667 | STUDLESS TIRE - The present invention has its object to provide a high performance studless tire, which has both good braking force and high handling stability on ice or snow, at higher productivity and at a lower price for customers. The studless tire comprises a tread made of a rubber composition containing | 03-04-2010 |
20100056684 | RUBBER COMPOSITION FOR STUDLESS TIRE AND STUDLESS TIRE USING THE SAME - The present invention has its object to provide a rubber composition for a studless tire that contributes to both good braking force and high handling stability on ice or snow, and a high performance studless tire using the rubber composition. The rubber composition for the studless tire contains: a mixture of a zinc salt of an aliphatic carboxylic acid and a zinc salt of an aromatic carboxylic acid; an oil or a plasticizer; and a rubber component that comprises 40% by mass or more of a butadiene rubber relative to 100% by mass of a total amount of the rubber component. | 03-04-2010 |
20100056685 | STUDLESS TIRE FOR PASSENGER VEHICLE - The present invention has its object to provide a high performance studless tire for a passenger vehicle which has both good braking force and high handling stability on ice or snow. The studless tire for a passenger vehicle comprises a tread having a total sulfur content of 0.7% by mass or less and having a crosslink density of 2.0×10 | 03-04-2010 |
20100078853 | METHOD OF MANUFACTURING STUDLESS TIRE - The method of manufacturing a studless tire according to the present invention includes a first step, a second step and a third step. In the first step, a kneaded substance is obtained by kneading a composite rubber component containing mineral oil-extended butadiene rubber and a compounding ingredient excluding sulfur and a vulcanization accelerator. In the second step, an unvulcanized rubber composition is obtained by kneading the kneaded substance while adding sulfur and a vulcanization accelerator thereto. In the third step, the unvulcanized rubber composition is vulcanized in a mold for a tire tread under pressurization and/or heating. | 04-01-2010 |
20100144954 | TREAD RUBBER COMPOSITION FOR STUDLESS TIRE AND STUDLESS TIRE - The present invention has its object to provide a tread rubber composition for a studless tire having favorable performance on ice and snow and excellent abrasion resistance while reducing strain dependence of hardness of the tread rubber and maintaining rigidity on roads that are not covered with snow. | 06-10-2010 |
20100317782 | RUBBER COMPOSITION FOR STUDLESS TIRE AND STUDLESS TIRE - The present invention provides a rubber composition for a studless tire and a high-performance studless tire produced therefrom, which achieve good braking force and handling stability on ice and snow. The rubber composition for a studless tire includes: a rubber component; a zinc salt of a C4-C12 aliphatic carboxylic acid, or a C4-C12 aliphatic carboxylic acid and zinc oxide; and an oil or a plasticizer. The rubber component contains 40% by mass or more of butadiene rubber per 100% by mass of the rubber component. | 12-16-2010 |
20110046291 | RUBBER COMPOSITION FOR STUDLESS TIRE AND STUDLESS TIRE - The present invention provides a rubber composition for a studless tire, which can achieve sufficient abrasion resistance, performance on ice and snow, and wet grip performance in a balanced manner, and a studless tire having a tread produced from the above composition. The rubber composition for a studless tire contains a rubber component including natural rubber and butadiene rubber; aromatic oil; silica; and carbon black, wherein the total amount of the natural rubber and the butadiene rubber is 30% by mass or more based on 100% by mass of the rubber component, the amount of the aromatic oil is 12-85 parts by mass and the amount of the silica is 12-85 parts by mass, per 100 parts by mass of the rubber component, and the proportion of the silica is 45% by mass or more based on 100% by mass of the total of the silica and the carbon black. | 02-24-2011 |
20110077359 | RUBBER COMPOSITION FOR CAP TREAD AND STUDLESS TIRE - The present invention has its object to provide a rubber composition for a cap tread capable of improving the performance on snow and ice and the wet performance in good balance, and a studless tire having a cap tread produced from the rubber composition. The present invention relates to a rubber composition for a cap tread, including a rubber component that contains epoxidized natural rubber and butadiene rubber, the rubber component containing 1 to 85% by mass of the epoxidized natural rubber, based on 100% by mass of the rubber component, and the epoxidized natural rubber having an epoxidation degree of 1.5 to 40 mol %. | 03-31-2011 |
20110112214 | RUBBER COMPOSITION FOR CAP TREAD AND STUDLESS TIRE - The present invention aims to provide a rubber composition that improves heat resistance and particularly inhibits the changes in properties such as hardness of the vulcanized rubber composition (rubber hardening degradation) due to long-term use without an increased amount of an age resistor, thereby extending the life-span without deterioration of performance on ice, and reduces vulcanization time while maintaining good scorch resistance, and increases cross-linking efficiency; and a studless tire having a cap tread produced from the composition. The rubber composition for a cap tread of the invention comprises: a rubber component containing an isoprene-based rubber; silica; a compound represented by formula (I) and/or (II); and a thiuram vulcanization accelerator, | 05-12-2011 |
20110112215 | RUBBER COMPOSITION FOR STUDLESS TIRE AND STUDLESS TIRE - The invention provides a rubber composition for studless tire achieving well-balanced abrasion resistance, performance on ice and snow, handling stability, and wet grip performance; and a studless tire including a tread produced from the composition. The composition contains: a rubber component; aromatic oil; silica; carbon black; and a mixture of a zinc salt of aliphatic carboxylic acid and a zinc salt of aromatic carboxylic acid, wherein the total of NR and BR in 100% by mass of the rubber component is 30% by mass or more, the amount of aromatic oil is 12-85 parts by mass, the amount of silica is 12-85 parts by mass, and the amount of mixture is 1 part by mass or more, per 100 parts by mass of the rubber component, and the proportion of silica is 45% by mass or more per 100% by mass of the total of the silica and carbon black. | 05-12-2011 |
20120259038 | RUBBER COMPOSITION FOR CAP TREAD AND WINTER TIRE - Provided are a rubber composition that makes it possible to improve heat resistance and particularly suppress changes in the properties (e.g. hardness) of the vulcanized rubber composition with long-term use (rubber hardening degradation) to suppress a reduction in performance on snow and ice to extend the life-span, without increase in the antioxidant amount, achieve good performance on snow and ice, wet-grip performance, and abrasion resistance, and reduce curing time and enhance cross-linking efficiency; and a winter tire including a cap tread produced from the composition. The rubber composition for a cap tread comprises a rubber component containing an isoprene-based rubber and butadiene rubber; silica; aromatic oil; a compound represented by formula (I) and/or formula (II); and a thiuram vulcanization accelerator, wherein the amount of silica is 15-80 parts by mass, and the amount of aromatic oil is 15-80 parts by mass, per 100 parts by mass of the rubber component. | 10-11-2012 |
20130030111 | RUBBER COMPOSITION FOR WINTER TIRE, AND WINTER TIRE - The present invention provides a rubber composition for a winter tire which improves in performance on ice and snow, wet grip performance, and abrasion resistance in a balanced manner, and also has favorable proccessability; and a winter tire including a tread produced using the rubber composition. The present invention relates to a rubber composition for a winter tire which contains predetermined amounts of natural rubber, butadiene rubber, aromatic oil, silica, and carbon black, and also contains a specific silane coupling agent that includes a linking unit A represented by the following formula (1) and a linking unit B represented by the following formula (2) and has a predetermined content of the linking unit B. | 01-31-2013 |
20130281610 | RUBBER COMPOSITION FOR TREAD AND PNEUMATIC TIRE USING THE SAME FOR TREAD - It is an object of the present invention to provide a rubber composition for a tread which can improve both performance on ice and abrasion resistance and a studless winter tire having a tread formed by this rubber composition. The present invention provides a rubber composition for a tread comprising 0.1 to 7.0 parts by mass of nanodiamond based on 100 parts by mass of a rubber component comprising at least one selected from a group consisting of a natural rubber, an isoprene rubber, a styrene butadiene rubber and a butadiene rubber, and a pneumatic tire having a tread formed by this rubber composition. | 10-24-2013 |
20140221525 | RUBBER COMPOSITION FOR STUDLESS WINTER TIRES, AND STUDLESS WINTER TIRE - Provided are: a rubber composition for studless winter tires, achieving balanced improvement in performance on ice and snow, wet grip performance, and abrasion resistance; and a studless winter tire including a tread formed from the same. The rubber composition for studless winter tires includes: a rubber component including NR and BR; an aromatic oil; silica; and carbon black, wherein the combined amount of NR and BR is 30 mass % or more per 100 mass % of the rubber component; the amount of aromatic oil is 12-85 parts by mass per 100 parts by mass of the rubber component; the silica content is 45 mass % or more per 100 mass % in total of silica and carbon black; the silica includes at least one silica (1) with an N | 08-07-2014 |