Provided is an all-season tire tread rubber composition in which braking performance and wear performance are secured at the same time. A rubber composition for tire tread according to the present disclosure comprises: 100 parts by weight of raw rubber comprising solution polymerized styrene-butadiene rubber which has a styrene content of 20 to 30 wt % and a vinyl content within butadiene of 20 to 30 wt %, and is manufactured by a continuous method; 90 to 110 parts by weight of silica; and 20 to 40 parts by weight of modified liquid butadiene rubber.

The introduction of graphene as an additive in rubber compounds is disclosed. The product shows increased barrier protection for tire innerliners, with no tradeoffs in other characteristics.

An elastomeric composition is disclosed. The elastomeric composition includes, per 100 parts by weight of rubber (phr): about 60 to about 100 phr of polybutadiene having a cis-1,4 linkage content of at least 95%; about 5 to 40 phr of a styrene/butadiene copolymer; a curative agent; an antioxidant; about 50 to about 80 phr hydrocarbon resin; about 100 to about 140 phr silica; about 1 to about 20 phr silane coupling agent and about 5 to about 30 phr of a polymer selected from the group consisting of ethylene-propylene-diene terpolymer, butyl rubber, poly(isobutylene-co-para-methylstyrene) and poly(isobutylene-co-para-methyl-styrene-co-isoprene) terpolymer. The polymer based on ethylene-propylene-diene terpolymer, butyl rubber, poly(isobutylene-co-para-methylstyrene) and poly(isobutylene-co-para-methylstyrene-co-isoprene) terpolymer may be functionalized.

The introduction of graphene as an additive in truck tire treads is disclosed. The product shows increased electrical resistance in tire treads, with no tradeoffs in other characteristics.

The present disclosure relates to a modified conjugated diene-based polymer and a rubber composition including the same, and provides a modified conjugated diene-based polymer including a first polymer chain and a second polymer chain, including a repeating unit derived from a conjugated diene-based monomer and a derived unit from a nitrogen-containing modification initiator, in each, wherein the first polymer chain includes a derived unit from an aminoalkoxysilane-based modifier in at least one terminal, the second polymer chain includes a derived unit from an aminoepoxy-based modifier in at least one terminal, and the aminoalkoxysilane-based modifier includes 6 or more alkoxy groups in a molecule.

In a first aspect, the present invention is directed to a rubber composition comprising 70 phr to 100 phr of styrene butadiene rubber including a first styrene butadiene rubber having a glass transition temperature within a range of −49° C. to −15° C. and a second styrene butadiene rubber having a glass transition temperature within a range of −50° C. to −89° C. Moreover, the rubber composition comprises 10 phr to 30 phr of one or more of natural rubber and synthetic polyisoprene rubber, 40 phr to 70 phr of silica, and 10 phr to 40 phr of at least one hydrocarbon resin selected from one or more of C5 resins, CPD resins, DCPD resins, C9 modified C5 resins, C9 modified CPD resins, and C9 modified DCPD resins. In another aspect, the present invention is directed to a tire comprising a tire tread with the aforementioned rubber composition.

A mixture of an organosilicon compound represented by average structural formula (2), wherein the area percentage occupied by an organic compound represented by structural formula (1) in GPC is from 5% to 95%, provides a rubber composition which exhibits excellent dispersibility of an inorganic filler and enables the achievement of a crosslinked cured product that has improved wear resistance, rolling resistance and wet grip performance. This rubber composition enables the achievement of a desired low fuel consumption tire.

(R.sup.1O).sub.3-p(R.sup.2O).sub.pSi—(CH.sub.2).sub.j—S.sub.y—(CH.sub.2).sub.k—Si(OR.sup.2).sub.q(OR).sub.3-q  (2):

(In the formula, R.sup.1 represents an alkyl group having from 1 to 3 carbon atoms; R.sup.2 represents an alkyl group having from 4 to 8 carbon atoms; p represents a number from 0 to 3; q represents a number from 0 to 3; j represents a number from 1 to 10; k represents a number from 1 to 10; and y represents a number from 2 to 8.)

(R.sup.1O).sub.3-m(R.sup.2O).sub.mSi—(CH.sub.2).sub.h—S.sub.x—(CH.sub.2).sub.i—Si(OR.sup.2).sub.n(OR.sub.1).sub.3-n  (1):

(In the formula, R.sup.1 and R.sup.2 are as defined above; m represents an integer from 0 to 3; n represents an integer from 0 to 3; h represents an integer from 1 to 10; i represents an integer from 1 to 10; x represents an integer from 2 to 8; and (m+n) represents an integer from 3 to 6.)

A rubber compound for the preparation of a tread portion of a pneumatic tyre. The compound comprises at least one cross-linkable unsaturated chain polymer base capable of assuming all of the chemical-physical and mechanical characteristics of an elastomer after cross-linking, a filler comprising silica, a plasticizing agent and a curing system. The cross-linkable unsaturated chain polymer base has a peak Tan δ value between −15° C. and 5° C. while the plasticizing agent is made up of an aliphatic chain comprising at least one polar group and has a melting temperature of between 5° C. and 40° C.

A rubber composition for a tire contains a diene rubber, silica, and a specific modified butadiene polymer, wherein the diene rubber contains an aromatic vinyl-conjugated diene rubber A and at least one rubber component B selected from an aromatic vinyl-conjugated diene rubber b1 other than the rubber A and a butadiene rubber b2 having a weight average molecular weight of ≥15000. A content of the aromatic vinyl-conjugated diene rubber A is from 30 to 90% by mass, and a content of the rubber component B is from 10 to 70% by mass, an average TG of the diene rubber is lower than −20° C., a content of the silica is from 80 to 200 parts by mass per 100 parts by mass of the diene rubber, and a content of the modified butadiene polymer is from 1.0 to 25.0% by mass with respect to content of the silica.

A rubber composition for a tire tread chimney component includes a sulfur-vulcanizable elastomer and an electrically conductive polymer. The rubber composition is further defined by an absence of electrically conductive carbon black. The sulfur-vulcanizable elastomer is selected from the group consisting of natural rubber, polybutadiene, polyisoprene, styrene butadiene rubber, nitrile rubber, and combinations thereof. The sulfur-vulcanizable elastomer and the electrically conductive polymer are substantially evenly mixed together. In the tire, and upon curing, the tire tread chimney component provides a dissipative pathway for static electricity from the tire to the ground in operation.