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.

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.

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.

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 present invention relates to a modified conjugated diene-based polymer and a rubber composition including the same, and provides a modified conjugated diene-based polymer satisfying the following: a) a molecular weight distribution curve by gel permeation chromatography (GPC) has a unimodal shape; b) molecular weight distribution (PDI: MWD) is 1.00 or more and less than 1.70; c) cold flow is 1.00 or less; and d) the Si content is 100 ppm or more based on a total weight of the modified conjugated diene-based polymer.

The present invention relates to a modified conjugated diene-based polymer and a rubber composition including the same, and provides a modified conjugated diene-based polymer satisfying the following: a) a molecular weight distribution curve by gel permeation chromatography (GPC) has a unimodal shape; b) molecular weight distribution (PDI: MWD) is 1.00 or more and less than 1.70; c) cold flow is 1.00 or less; and d) the Si content is 100 ppm or more based on a total weight of the modified conjugated diene-based polymer.

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.

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.

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.

The invention relates to a footwear with a rubber sole where such sole is comprised of a rubber composition which contains zinc rosinate. The zinc rosin is provided to include zinc rosinate as a product formed in situ within the rubber composition of zinc oxide and freely added rosin acid. The footwear rubber sole is intended for ground engagement. In one embodiment, the rubber composition for the rubber sole further contains triglyceride vegetable oil. In one embodiment, the rubber composition for the rubber sole additionally contains a traction promoting resin.