59results about How to "Improve rolling resistance performance" patented technology

The present invention aims to provide a tire rubber composition that achieves a good balance of grip performance (especially, wet grip performance), abrasion resistance, cut and chip resistance, low rolling resistance, and kneadability, and a pneumatic tire using the same. The composition comprise: a rubber component including a styrene-butadiene rubber modified by a compound of formula (1): and a non-modified styrene-butadiene rubber; a filler including silica, the filler being in an amount of 80 parts by mass or less per 100 parts by mass of the rubber component; and sulfur in an amount of 0.5-1.5 parts by mass per 100 parts by mass of the rubber component, the modified styrene-butadiene rubber having a bound styrene content of 20-40% by mass and a vinyl content of 30-65% by mass, and the non-modified styrene-butadiene rubber having a bound styrene content of 25-45% by mass and a vinyl content of 10-50% by mass.

The invention provides a solution polymerized styrene-butadiene rubber (SSBR) composition, a preparation method thereof, and a vulcanized rubber thereof. The solution polymerized styrene-butadiene rubber composition comprises blended modified rubber component and solution polymerized styrene-butadiene rubber. Calculated according to the weight of solution polymerized styrene-butadiene rubber as 100 parts, the composition comprises 1-70 parts of the modified rubber component. The modified rubber component comprises uncrosslinked rubber and rubber particles with crosslinked structures, which are dispersed in the uncrosslinked rubber. The rubber particles with crosslinked structures are nitrile rubber particles with an average particle size of 50-200nm and a gel content of 60wt% or higher. The uncrosslinked rubber is styrene-butadiene rubber. A weight ratio of the rubber particles with crosslinked structures to the uncrosslinked rubber is 80:20-30:70. The wet skid performance and wear resistance of the vulcanized rubber of the solution styrene-butadiene rubber composition can both be improved; the vulcanized rubber has low rolling resistance, and can be used for preparing high-efficiency automobile tread rubber.

A rubber composition improving the reaction efficiency of a silane coupling agent in kneading, suppressing generation of air bubbles, improving processability and abrasion resistance and lowering rolling resistance, and a process for preparing the same are provided. A rubber composition comprising silica, wherein 3 to 15 parts by weight of a silane coupling agent based on 100 parts by weight of silica and 0.3 to 1.45 parts by weight of a potassium salt based on 100 parts by weight of silica are contained.

The present invention relates to a rubber composition including (A) at least one rubber component selected from the group consisting of a synthetic rubber and a natural rubber; (B) a polymer of farnesene; and (C) carbon black having an average particle size of from 5 to 100 nm, a content of the carbon black (C) in the rubber composition being from 20 to 100 parts by mass on the basis of 100 parts by mass of the rubber component (A).

A rubber composition comprises 100 parts by mass of a diene rubber component comprising at least one selected from the group consisting of styrene-butadiene rubber, polybutadiene rubber, natural rubber and polyisoprene rubber, the diene rubber component containing modified styrene-butadiene rubber modified with a functional group having an interaction with a silanol group on a surface of silica, from 20 to 120 parts by mass of silica, and from 3 to 30 parts by mass of hydrogenated non-modified nitrile rubber. A pneumatic tire has a rubber part comprising the rubber composition.

The invention relates to the technical field of tire rubber, in particular to a four-season all-steel ice and snow tire tread rubber composition. The composition comprises the following steps, by weight, after mixing: 10-30 parts of natural rubber, 10-35 parts of liquid rubber, 65-80 parts of functionalized solution polymerized styrene-butadiene rubber, 5-25 parts of carbon black, 20-55 parts of white carbon black with a low specific surface area, 4.0 -12.0 parts of a silane coupling agent ranges, 1.5-3.0 parts of white carbon black dispersing agent, 2.0-5.0 parts of zinc oxide, 1.0-3.0 partsof stearic acid, 1.0-3.0 parts of an anti-aging agent 4020, 1.5-2.5 parts of an anti-aging agent RD, 1.0-4.0 parts of rubber protective wax, 1.5-2.5 parts of sulfur S-80, 1.0-3.5 parts of tear-resistant resin, 1.0-2.5 parts of an accelerant NS-80 and 0-0.5 part of an accelerant DPG-80. The tire tread produced by the invention not only has excellent snowfield grip on a snowfield pavement, but alsokeeps excellent grip on an all-ice pavement, and has excellent rolling resistance, wet skid resistance and wear resistance.

The mobility of a vehicle having first and second pairs of diagonally opposite wheels is extended when the pressure on a given wheel is abnormally low. A load on the first pair of wheels defines a first load diagonal, and a load on the second pair of wheels defines a second load diagonal. A disequilibrium between the first and second load diagonals is induced by actuation of a level corrector comprised of at least two actuators each acting on a respective side of the vehicle, for reducing a load borne by said given wheel and thereby extending the mobility thereof.

Provided is a rubber composition for tire tread, comprising: a diene rubber component containing 20 mass% or more of a specific denatured conjugated diene rubber; silica contained in the quantity of 60-200 parts by mass with respect to 100 parts by mass of said rubber component; and polysiloxane represented by averaged compositional formula (1), and contained in the quantity of 1-20 mass% with respect to the quantity of silica. Formula (1): (A)a(B)b(C)c(D)d(R1)eSiO(4-2a-b-c-d-e)/2 (In the formula, A represents a bivalent organic group containing a sulfide group, B represents a C5-10 monovalent hydrocarbon group, C represents a hydrolyzable group, D represents an organic group containing a mercapto group, R1 represents a C1-4 monovalent hydrocarbon group, and a-e satisfy the conditional formulae 0≤a<1, 0≤b<1, 0<c<3, 0<d<1, 0≤e<2, and 0<2a+b+c+d+e<4, with the caveat that either a or b is not 0.) Also provided is a pneumatic tire using said composition in tire tread.

The invention provides a composite carbon material and a preparation method thereof, a rubber composite material and a tire, and relates to the technical field of carbon materials. According to the composite carbon material preparation method, an emulsifying liquid with a specific composition is sprayed to form atomized liquid droplets, the atomized liquid droplets react with primary structurally-modified carbon black existing in the form of flue gas, and by using a reinforcing filler and surface characteristics of the primary structurally-modified carbon black, the reinforcing filler reacts with and links to the primary structurally-modified carbon black to form the integration so as to obtain the composite carbon material. According to the present invention, the preparation method has simple and convenient operation, and is suitable for industrial-scale production, and the prepared composite carbon material has good low-hysteresis property. The present invention further provides a composite carbon material, which is prepared by using the composite carbon material preparation method, can meet the low-hysteresis performance requirement and the requirements of large-scale tire mixing, can be filled into different types of rubbers, is not limited to specific rubber latex, and has wide application range.

The tire rubber composition includes 100 parts by mass of a solid rubber (A) having a glass transition temperature (Tg) of not more than −10° C., 0.1 to 50 parts by mass of a modified liquid diene rubber (B) having a functional group derived from a silane compound with a specific structure, and 20 to 200 parts by mass of a filler (C), the modified liquid diene rubber (B) satisfying the following (i) to (iv): (i) the weight average molecular weight (Mw) is 15,000 to 120,000, (ii) the vinyl content is not more than 70 mol %, (iii) the average number of the functional groups per molecule of the modified liquid diene rubber (B) is 1 to 30, and (iv) the glass transition temperature (Tg) is not more than 0° C.

A rubber composition, wherein a reaction efficiency of a silane coupling agent at kneading is improved, generation of air bubbles is suppressed, abrasion resistance is improved, and rolling resistance is lowered, is provided. A rubber composition containing silica, which comprises 3 to 15 parts by weight of a silane coupling agent based on 100 parts by weight of silica, and boric acid.

The present invention provides a pneumatic tire which has both rolling resistance and wet grip performance while suppressing the occurrence of uneven wear. This pneumatic tire has a configuration in which cap rubber (10) is divided into a center part (10c) that extends across a tire equator line (CL) and shoulder parts (10s, 10s) located on both sides thereof, a compound having a higher tandelta at 0 DEG C compared to the shoulder part (10s) and focusing on wet grip performance is disposed in the center part (10c), a compound having a lower tandelta at 60 DEG C compared to the center part (10c) and focusing on rolling resistance is disposed in both the shoulder parts (10s, 10s), and circumferential fine grooves (11, 11) are formed on the respective shoulder sides of outermost main grooves (9a, 9z) in both the shoulder parts (10s, 10s).

Disclosed herein is a rubber composition containing 100 parts by mass of a solid rubber (A), 0.1 to 50 parts by mass of a modified liquid diene rubber (B) having a functional group derived from a silane compound represented by the formula (1), and 20 to 200 parts by mass of a filler (C), the modified liquid diene rubber (B) satisfying (i) to (iii): (i) a weight average molecular weight (Mw) is not less than 1,000 and less than 15,000; (ii) a vinyl content is not more than 70 mol %; and (iii) an average number of functional groups per molecule of the modified liquid diene rubber (B) is 1 to 20.

A tire (1) comprises two beads (4), two sidewalls (3) connected to the beads and a crown (2) connected to the ends of the two sidewalls, the crown comprising a crown reinforcement (6) and a tread (5) radially outside the crown reinforcement (6), said tread (7) comprising a plurality of tread pattern blocks (71), at least two radially superposed layers: a sublayer (7S) covering the crown reinforcement (6), and a main layer (7P) radially above the crown reinforcement (6), the sublayer comprising a plurality of circumferential reinforcing elements (73) being formed of a rubber compound having greater stiffness than the stiffness of the rubber compound of the rest of the sublayer, the circumferential reinforcing elements (73) extending radially from the radially exterior surface of said crown reinforcement (6) in the direction of the interface between the sublayer (7S) and the main layer (7P), said circumferential reinforcing elements having an axial width which decreases gradually with increasing radial proximity to the outside.