摘要:
A pneumatic tire using as a tread part, a rubber composition containing a high silica-content rubber composition having a difference F-S between an amount of filler F and an amount of a softening agent S of 60 to 90 parts by weight and having a durometer hardness measured at 20° C. of 65 to 76.
摘要:
A pneumatic tire using as a tread part, a rubber composition containing a high silica-content rubber composition having a difference F-S between an amount of filler F and an amount of a softening agent S of 60 to 90 parts by weight and having a durometer hardness measured at 20° C. of 65 to 76.
摘要:
Provided is a tire rubber composition blended with an antioxidant that is derived from a raw material other than petroleum resources, the tire rubber composition being capable of achieving an oxidation resistance equal to or higher than a conventional level and of improving forming processability and a low hysteresis loss property. The tire rubber composition includes a blend of: 100 parts by weight of a diene rubber; 5 to 130 parts by weight of an inorganic filler; and 0.01 to 10 parts by weight of a tea extract containing a catechin.
摘要:
A rubber composition for a tire having greatly shortened vulcanization time, good silica dispersibility and, after vulcanization, superior braking capability, abrasion resistance and low rolling resistance, comprising (A) 100 parts by weight of a conjugated diene-based rubber, (B) 90 to 150 parts by weight of a reinforcing filler containing silica, (C) 0 to 40 parts by weight of an oil, (D) 4 to 20% by weight, based upon the weight of the silica, a silane coupling agent having the formula (I): Y3Si—CnH2nA (I) wherein Y indicates a C1 to C25 alkyl or alkoxyl group or a chloro group, the three Y's may be the same or different, n is an integer of 1 to 6, A is a mercapto group or SmZ group, where Z is the group: and m is an integer of 1 to 6) (E) sulfur, and (F) 0.05 to 5 parts by weight of a thiuram disulfide-based vulcanization accelerator having the formula (II): wherein R5, R6, R7 and R8 are independently hydrocarbon groups having 2 to 18 carbon atoms, is provided.
摘要翻译:一种轮胎用橡胶组合物,其具有大大缩短的硫化时间,良好的二氧化硅分散性,硫化后的优异的制动能力,耐磨性和低滚动阻力,其包含(A)100重量份的共轭二烯系橡胶,(B) 90〜150重量份的含有二氧化硅的增强填料,(C)0〜40重量份油,(D)4〜20重量%,基于二氧化硅的重量,硅烷偶联剂, 式(I):<?in-line-formula description =“In-line formula”end =“lead”?> Y 3 Si-C sub> H 独立地是具有2至18个碳原子的烃基。
摘要:
A rubber composition for a pneumatic tire containing 100 parts by weight of a diene-based rubber and 5 to 120 parts by weight of carbon black having a particle size of 15 to 40 nm, a nitrogen absorption specific surface area N2SA of 60 to 200 m2/g, and a pH of 1 to 5 or 8.5 to 13, which can improve wet performance of a tire without causing problems in productivity and conductivity.
摘要:
A pneumatic tire reducing road noise without deteriorating durability and rolling resistance. In this pneumatic tire, the bead filler includes a triangle portion abutting a bead core and having a substantially triangular cross-sectional shape, and a uniform-thickness portion extending from a top of the triangle portion in a radially outward direction of the tire and having a substantially uniform thickness. An upper-end position of the uniform-thickness portion is outward, in a radial direction of the tire, from a position 1.6 times as high as the height of the triangle portion, and is at least 5 mm apart from the belt layers. A thickness of the uniform-thickness portion is thicker than 0.1 mm and thinner than 0.5 times a lower-end width of the triangle portion. The bead filler includes a plurality of rubber layers formed of mutually different rubber compositions. The rubber compositions forming these rubber layers have loss tangents (tan δ) gradually decreasing from the outermost-periphery rubber layer toward the innermost-periphery rubber layer, are harder than other rubber compositions neighboring the bead filler, and have breaking elongations whose mutual differences are 50% points or less.
摘要:
A pneumatic tire allowed to increase steering stability and durability while reducing rolling resistance, wherein a reinforced rubber layer extending from a bead part along a side wall part is installed in the side wall part. A rubber composition forming the reinforced rubber layer has a loss of tangent (tan δ) measured at 60° C. of 0.01 to 0.25, a JIS-A hardness measured at 23° C. of 70 to 95, and a breaking elongation in a tension test measured at 23° C. of 200% or more.
摘要:
A rubber composition containing (A) a sulfur cross-linkable rubber and (B) a conjugated diene-based rubber gel, having a toluene swelling index of 16 to 70, comprising 40 to 75% by weight of conjugated diene monomer units and 60 to 25% by weight of aromatic vinyl monomer units.
摘要:
A rubber composition containing 100 parts by weight a sulfur-vulcanizable rubber (A) and 0.1 to 30 parts by weight of a vulcanization agent of a cyclic polysulfide (B) having the formula (I): wherein R is a substituted or unsubstituted C2 to C20 alkylene group, substituted or unsubstituted C2 to C20 oxyalkylene group or alkylene group having an aromatic ring, n is an integer of 1 to 20, x is a number of 2 to 6 on average.
摘要:
A rubber composition containing (i) a conjugated diene-based rubber gel having a toluene swelling index of 16 to 70, (ii) a diene-based rubber such as natural rubber, polyisoprene rubber, aromatic vinyl-conjugated diene copolymer rubber and/or polybutadiene rubber, and (iii) an optional carbon black and/or silica and (a) a pneumatic tire using this composition as a high hardness reinforcing layer extending from a bead along a tire sidewalls, in which the fluidity and dimensional stability at the time of extrusion are improved, while maintaining a sufficient hardness of a high hardness reinforced rubber, (b) a pneumatic tire using this composition as two ends of a tire tread extrudate, maintaining a flex fatigue of the two ends of the tread, in which the extrudability and extrusion dimensional stability are improved and (c) a pneumatic tire using the composition as a 1.5 mm to 6 mm thick undertread, in which a high elasticity and relatively thick gauge undertread, and excellent processability and steering stability are provided.