A vulcanizate prepared by a method comprising introducing an elastomer, a filler, and a mercapto-functional siloxane to form a masterbatch and introducing a curative to the masterbatch to form a vulcanizable composition.

The various embodiments of the present invention disclose an peroxide-vulcanised TPVs based on Hevea Brasiliensis natural rubber, polypropylene and solid sulfonic acid doped polyaniline [PAni.DBSA] with useful electrical conductivities (up to about 2.1+0.2 S/cm] can be produced by using an internal mixer. The peroxide-vulcanised TPVs exhibit useful physical properties and also possess a reasonable good electromagnetic interferences shielding effectiveness. These peroxide-vulcanised TPVs could be recycled up to 4 times without significant loss of their EMI SE, electrical and physical properties. As a result, they have good potential to be used for manufacturing any EMI shielding products, such as EMI shielding seals and gaskets.

A pneumatic tire assembly is provided and includes an annular tire, an annular inflatable inner tube, and an annular solid insulation tube. The annular inflatable inner tube is positioned within the annular tire. The annular solid insulation tube is positioned between the annular tire and the annular inflatable inner tube and includes an outer surface in contact with an inner surface of the annular tire and an inner surface in contact with an outer surface of the annular inflatable inner tube.

A method for bonding a rubber and an ethylene-vinyl acetate (EVA) foam, comprising: placing the rubber and a hot melt adhesive film in a mold, with the rubber adhered by a first side of the hot melt adhesive film; hot pressing the hot melt adhesive film and the rubber to bond them together; placing the ethylene-vinyl acetate (EVA) foam in the mold a, with the ethylene-vinyl acetate (EVA) foam adhered to a second side of the hot melt adhesive film, and with the ethylene-vinyl acetate (EVA) foam and the rubber disposed on opposite sides of the hot melt adhesive film; hot pressing the ethylene-vinyl acetate (EVA) foam, the hot melt adhesive film, and the rubber to bond them together to form a final product; and removing the final product from the mold.

A masterbatch composition including glass bubbles and a toughening agent in a blend of syndiotactic 1,2-poly-butadiene and cis-1,4-polybutadiene is disclosed. The glass bubbles are present in an amount of at least 25 percent by weight, based on the total weight of the masterbatch composition. A method of making a rubber composition from the masterbatch composition is disclosed as well as a rubber composition and vulcanized rubber made from the masterbatch composition. A rubber composition that includes syndiotactic 1,2-polybutadiene, cis-1,4-polybutadiene, a toughening agent that includes at least one of a fluoroplastic or an organic or ceramic fiber, and glass bubbles in an amount up to 25 percent by weight, based on the total weight of the rubber composition, is also disclosed.

As the sealant material composition forming a sealant layer of a pneumatic tire provided with the sealant layer on a tire inner surface, the sealant material composition prepared by blending from 0.1 parts by mass to 20 parts by mass of a crosslinking agent, from 0.1 parts by mass to 40 parts by mass of an organic peroxide, and from 10 parts by mass to 400 parts by mass of a liquid polymer per 100 parts by mass of a butyl rubber is used.

Provided is a pneumatic tire which comprises a pair of left and right bead portions, sidewall portions continuous from the bead portions, and a tread portion that couples the sidewall portions. The pneumatic tire has a carcass layer mounted between the left and right bead portions. The sidewall portions each have a foamed rubber layer disposed outside the carcass layer and a side rubber layer disposed outside the foamed rubber layer. The density of the foamed rubber layer is from 0.5 to 0.9 g/cm.sup.3 and a tan of the foamed rubber layer at 20 C. is not greater than 0.17. A rubber composition for sidewalls that forms the side rubber layer is obtained by blending from 1 to 20 parts by weight of a thermoplastic resin and from 10 to 65 parts by weight of a carbon black in 100 parts by weight of a diene rubber.

Blends of elastomer composites with unfilled or less highly filled elastomer reduces hysteresis without compromising reinforcement. Hysteresis may also be reduced by adjusting the compounding method.

A process for retreading a tire, the process comprising the steps of providing a tire casing, providing a cured rubber component having first and second planar surfaces, providing a cushion gum, wherein the cushion gum contains a cure system comprising at least one stable aryl dinitrile oxide compound, applying the cushion gum to the tire casing, and forming a tire composite by applying the second planar surface of the cured rubber component to the cushion gum.

Provided is an anti-vibration rubber composition comprising a diene rubber, a silane coupling agent having at least one of a structural unit represented by general formula (1) and a structural unit represented by general formula (2), carbon black, and silica, at a blending ratio of carbon black (a) to silica (b), i.e. (a)/(b), of 10/90 to 45/55 (mass ratio). The anti-vibration rubber composition can be vulcanized in a shortened time while maintaining easy workability in vulcanization and gives an anti-vibration rubber excellent in durability. R.sup.1 represents a hydrocarbon group having 1 to 12 carbon atoms, L.sup.1 and L.sup.2 each independently represent a divalent hydrocarbon group having 1 to 5 carbon atoms, R.sup.2 and R.sup.4 each independently represent a divalent hydrocarbon group having 1 to 5 carbon atoms, R.sup.3 and R.sup.5 each independently represent a hydrocarbon group having 1 to 5 carbon atoms, and x and y each independently represent an integer of 1 or more.

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