A tire includes: a tire frame member formed in a ring shape from a frame resin material, and including a pair of bead sections, a pair of side sections, and a crown section; a ring shaped bead core that is embedded in and joined to each of the bead sections, and that is formed by a single strand, or plurality of strands, of bead cord extending in the tire circumferential direction, and covered with, and joined to, a covering resin material; and an extension portion that extends from each of the bead cores in a direction that intersects with the tire circumferential direction when viewed from a tire side face, and that is joined to the tire frame member.

The invention relates to a sulfur-crosslinkable rubber mixture, in particular for rubber-coating reinforcements in elastomer products, especially in vehicle tires, or inner components of vehicle tires, as well as to a vehicle tire. The rubber mixture comprises a diene rubber, an adhesive system, 10 to 200 phr silica, and 2 to 20 phr of a silane of the formula [(R.sup.1).sub.3Si—X].sub.mS.sub.n(R.sup.2).sub.2-m, where residues R.sup.1 are identical or different alkoxy groups, cyclic dialkoxy groups, cycloalkoxy groups, phenoxy groups, aryl groups, alkyl groups, alkenyl groups, aralkyl groups, or halides, and where X is a polar organic group containing urea, m represents the value 1 or 2, n is an integer between 1 and 8, and R.sup.2 is a hydrogen atom or an acyl group comprising 1 to 20 carbon atoms.

In a filler for tires containing silica particles and an aggregation inhibitor inhibiting the aggregation of the silica particles, the aggregation inhibitor contains at least one kind selected from the group consisting of phosphate and derivative thereof, amino alcohol, cationic surfactant, water-soluble aminosilane, nitrogen-containing heterocyclic compound, nonionic surfactant, tertiary amine compound, polyvinyl alcohol, non-zinc soap, saturated fatty acid ester, and glycerine fatty acid ester.

The present invention is directed to a functionalized elastomer comprising the reaction product of a living anionic elastomeric polymer and a polymerization terminator of formula I ##STR00001##
wherein R.sup.1 is C1 to C4 linear alkyl, or C1 to C4 branched alkanediyl; X.sup.1, X.sup.2, X.sup.3 are independently O, S, or a group of formula (II) or (III) ##STR00002##
where R.sup.2 is C1 to C18 linear or branched alkyl; and Z is R.sup.3CHCHR.sup.4, where R.sup.3 is a covalent bond or C1 to C18 linear or branched alkanediyl, and R.sup.4 is a hydrogen or C1 to C18 linear or branched alkyl.

A run-flat tire includes: a pair of bead portions in which bead cores are embedded; sidewall portions that are continuous with tire radial direction outer sides of the bead portions; a carcass that extends across the pair of bead portions and has a body portion that is positioned between the bead cores and turn-up portions that are turned up from inside to outside about the bead cores; a belt layer disposed on a tire radial direction outer side of the carcass; a tread provided on a tire radial direction outer side of the belt layer; side reinforcing layers that are made of rubber, disposed on the tire inner side of the body portion, and configured so that a thickness of the side reinforcing layers gradually decreases toward the tread and the bead portions; and bead fillers that are made of resin and provided between the bead cores, the body portion, and the turn-up portions.

An object of the present disclosure is to provide a copolymer which is reduced in heat generation in a low strain region and exhibits good workability, while having excellent wear resistance and crack growth resistance. To achieve the object, the present disclosure proposes a copolymer containing at least a non-conjugated olefin unit and a conjugated diene unit, wherein: a content of the non-conjugated olefin unit therein is equal to or larger than 40 mol %; and a degree of crystallinity derived from the non-conjugated olefin unit in the temperature range of 100 C. to 150 C. measured by a differential scanning calorimeter (DSC), is equal to or smaller than 4.0%. The present disclosure also proposes a method for manufacturing the copolymer.

Disclosed herein are tires with a component comprising a cured rubber composition having a high dielectric constant, tire bead fillers comprising a cured rubber composition having a high dielectric constant, and related methods for increasing the dielectric constant of a cured rubber composition for a tire component. According to certain embodiments, the cured rubber composition has a dielectric constant of at least 20 and comprises 100 phr of at least one conjugated diene monomer-containing elastomer, filler comprising at least 25 phr of reinforcing carbon black, a cure package of specified composition, and optionally at least one anti-reversion agent.

The invention provides a high-grip tire rubber composition satisfying wet grip performance, dry grip performance and steering stability in a high and well-balanced manner, and a tire tread, a bead filler, a tire belt and a pneumatic tire which each partially include the composition. The high-grip tire rubber composition includes 100 parts by mass of a solid rubber (A), the solid rubber (A) including not less than 60 mass % of a styrene butadiene rubber with 20 mass % or more styrene content, 0.1 to 90 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 150 parts by mass of a filler (C), the modified liquid diene rubber (B) satisfying the following (i) to (iii): (i) the weight average molecular weight (Mw) is not less than 1,000 and less than 15,000, (ii) the vinyl content is not more than 70 mol %, and (iii) the average number of the functional groups per molecule of the modified liquid diene rubber (B) is 1 to 20.

A vulcanizable composition for preparing bead filler, the composition comprising a vulcanized rubber; and a vinyl aromatic-containing block copolymer compound, where the vinyl aromatic-containing copolymer is defined by the formula II
d-Vo-D-V-II
where each V is independently a polyvinyl aromatic block, D is a polydiene block, w is a hydrogen atom, a functional group, or a polymeric segment or block, and where d is a polydiene block, and where the overall vinyl content of the block copolymer is greater than 65%.

To provide a catalyst composition having high polymerization activity. To provide a polymer manufacturing method. To provide a polymer manufactured by the polymer manufacturing method. To provide a rubber composition including the polymer. To provide a tire using the rubber composition. A catalyst composition including a compound represented by Structural Formula I below, wherein the compound has an OH group at at least one position of the bipyridyl ring; M is a transition metal, a lanthanoid, scandium, or yttrium; R.sup.1 and R.sup.2 are a hydrocarbon group having one or more carbon atoms or a halogen atom; and R.sup.1 and R.sup.2 may be the same or different from each other. A polymer manufacturing method including a step of polymerizing one or more selected from the group consisting of a conjugated diene compound and a compound having an ethylenically unsaturated double bond in the presence of the catalyst composition. A polymer manufactured by the manufacturing method. A rubber composition including the polymer. A tire using the rubber composition.

##STR00001##