A tire comprising a tire frame that comprises a resin material and has a circular shape, and a metal-resin composite, the metal-resin composite having a structure in which a metal member, an adhesive layer and a resin layer are disposed in this order, and the tire satisfying the following conditions (1) to (3): (1) the adhesive layer comprises an acid-modified polyolefin as a first resin and a resin that is different from the an acid-modified polyolefin as a second resin, and a content of the first resin is 50% by mass or more of the entire resin in the adhesive layer; (2) the adhesive layer has a storage elastic modulus at 10 C. of 850 MPa or less; (3) the adhesive layer has a storage elastic modulus at 140 C. of 1.5 MPa or more.

A tire comprising a tire frame that comprises a resin material and has a circular shape, and a belt portion that comprises a metal-resin composite that is disposed around the tire frame, the metal-resin composite having a structure in which a metal member, an adhesive layer and a resin layer are disposed in this order, and satisfying the following Formula (1) and Formula (2):

23number of metal-resin composites in the belt portion/width of the belt portion (mm)100 Formula (1):

1/{(a/A)+(b/B)}210Formula (2): wherein, in Formula (2), A is a water permeation index of the resin layer, B is a water permeation index of the adhesive layer, a is a thickness of the resin layer (mm) and b is a thickness of the adhesive layer (mm).

Provided is novel polybutadiene having high isotacticity. The polybutadiene has a triad isotacticity (mm) of 72% or more.

Provided is a pneumatic tire including a sidewall that has a good balance of excellent handling stability, rolling resistance, and durability and further has excellent flex crack growth resistance. The sidewall is formed from a modified cellulose fiber-containing rubber composition that is allowed to simultaneously achieve excellent rigidity, excellent tensile properties, and low energy loss by improving the dispersibility of the cellulose fiber in rubber. The present invention relates to a pneumatic tire including a sidewall formed from a modified cellulose fiber-containing rubber composition, the modified cellulose fiber-containing rubber composition containing a modified cellulose fiber (A) obtained by adding a C15 or higher cyclic polybasic acid anhydride (a) containing a hydrophobic group to a cellulose fiber through esterification, a dispersing polymer (B) having a softening point of 135 C. or lower, and a rubber component (C).

Metallated aminosilane compounds for use as functional initiators in anionic polymerizations and processes for producing an aminosilane-functionalized polymer using the metallated aminosilane compounds to initiate anionic polymerization of at least one type of anionically polymerizable monomer. Preferred use of the metallated aminosilane compounds results in rubber compositions for use in tires comprising an aminosilane functionalized polymer.

Disclosed herein are a tire comprising at least one component having a surface coated with a liquid release layer, a process for preparing a tire having at least one component with a surface coated with a release layer, and a cured tire comprising a tire body at least one component with a surface coated with a release layer. The release layer comprises at least one silicone rubber and at least one adhesive polymer which may be present in latex form in the liquid release layer.

The crosslinkable rubber composition comprises a first elastomer consisting of polybutadiene having a Mooney plasticity ranging from 40 to 70 Mooney units, the content of the first elastomer being strictly greater than 50 phr, a second elastomer, and a carbon black having a specific surface area within a range of values extending from 15 m.sup.2/g to 25 m.sup.2/g and an oil adsorption number of compressed sample (COAN) within a range of values extending from 65 ml/100 g to 85 ml/100 g.

A run flat tire having a side reinforcing rubber part is disclosed. The side reinforcing rubber part is formed by a rubber composition having a ratio (M50H/M50N) of tensile stress (M50H) in 50% elongation at a measurement temperature of 100 C. to tensile stress (M50N) in 50% elongation at a measurement temperature of 23 C. of from 1.0 to 1.3. A ratio (M50H/M50F) of tensile stress (M50H) in 50% elongation at a measurement temperature of 100 C. of the rubber composition forming the side reinforcing rubber part to tensile stress (M50F) in 50% elongation at a measurement temperature of 100 C. of a rubber composition forming a bead filler is from 0.5 to 1.3.

A vulcanisable elastomeric composition for tyre component is described. The vulcanisable elastomeric composition includes modified silicate fibres as fillers. Moreover, the tyre component contains elastomeric materials which are obtainable by vulcanisation of the vulcanisable elastomeric composition. A tyre for vehicles which includes one or more of the tyre components is also described. The vulcanised elastomeric materials are characterised by having good static and dynamic mechanical properties, and particularly low hysteresis. Advantageously, the tyre which contains one or more of the tyre components has a reduced rolling resistance.

A run flat tire having a side reinforcing rubber part is disclosed. The side reinforcing rubber part is formed by a rubber composition having a ratio (M50H/M50N) of tensile stress (M50H) in 50% elongation at a measurement temperature of 100 C. to tensile stress (M50N) in 50% elongation at a measurement temperature of 23 C. of from 1.0 to 1.3. Ratio (t.sub.b10/t.sub.p10) of 10% vulcanization time (t.sub.b10) at a vulcanization temperature of 160 C. of a rubber composition for a bead filler to 10% vulcanization time (t.sub.p10) at a vulcanization temperature of 160 C. of a rubber composition for a covering rubber of a carcass ply is from 0.5 to 1.0.