Abstract: A rubber composition containing 100 parts by weight a sulfur-vulcanizable rubber (A) and 0.1 to 30 parts by weight of a vulcanization agent of a cyclic polysulfide (B) having the formula (I): wherein R is a substituted or unsubstituted C2 to C20 alkylene group, substituted or unsubstituted C2 to C20 oxyalkylene group or alkylene group having an aromatic ring, n is an integer of 1 to 20, x is a number of 2 to 6 on average.

Abstract: An object of the present invention can be to provide a crosslinking agent which exhibits excellent storage stability and heat resistance and which is used for a composition containing a rubber and/or a resin. Such an object is realized by the compound represented by the following formula (1). In the formula, Z represents an active hydrogen-containing group; X represents a non-cyclic aliphatic group, a cyclic aliphatic group, an aromatic group, or an alkyl aromatic group, which may be optionally substituted and which may contain at least one member selected from SO2, O, N, and S; J1 and J2 which are respectively included at a number of n independently represent a monovalent group, or J1 and J2 together represent a divalent group; R1 which is included at a number of n independently represents hydrogen atom or a non-cyclic aliphatic group; and n represents an integer of 1 to 4.

Abstract: A laminate comprising a thermoplastic elastomer composition (A) having a thermoplastic resin as a continuous phase and a composition containing an elastomer component as a dispersed phase and a diene-based rubber composition (C), adhered with a tackifier adhesive (B), where a difference of 50% modulus at room temperature is (A)>(C)>(B) and a difference of storage elastic modulus E? at 0° C. is (A)?(B)?(C), whereby the high temperature dynamic adhesiveness of the tackifier adhesive of the laminate comprising the thermoplastic elastomer composition layer/the tackifier adhesive layer/the diene-based rubber composition layer and the low temperature durability of the thermoplastic elastomer composition layer are improved.

Abstract: A thermoplastic resin elastomer/rubber laminate comprising a rubber layer containing 100 parts by weight of a rubber and 0.1-20 parts by weight of an antioxidant preblended thereto and a thermoplastic resin elastomer composition layer, obtained by laminating at least two layers of the rubber layer and the thermoplastic resin elastomer composition layer followed by heating and pressing, whereby the antioxidant migrates from the rubber layer to the thermoplastic resin elastomer composition layer to improve the weathering resistance as well as a pneumatic tire using the same as an inner liner.

Abstract: A pneumatic tire using an inner liner layer comprising a film of a thermoplastic resin, or a blend of a thermoplastic resin and an elastomer, having an air permeation coefficient of not more than 25×10?12 cc·cm/cm2·sec·cmHg and a Young's modulus of 1 to 1000 MPa, wherein a buffer rubber layer containing short fibers is arranged between the inner liner layer and a carcass layer in bead directions from two ends of a widest width belt layer in ranges of at least 20 mm, whereby a problem of trouble during production is solved and the durability of the inner liner layer is improved, without causing a problem of an increase in tire weight.

Abstract: A peroxide-crosslinked rubber composition having a superior anti-blooming property of a crosslinking agent and a high hardness containing (A) more than 60 parts by weight but not more than 95 parts by weight of rubber selected from NR, IR, SBR, BR, EPM, EPDM, silicone rubber and/or fluororubber and (B) 5 parts by weight but less than 40 parts by weight of a polar polymer having a solubility parameter (Sp value) of at least 17.6 (Pa1/2) and a weight average molecular weight of at least 100,000.

Abstract: A rubber/short fiber master batch obtained by stirring and mixing an aqueous dispersion of short fibers having an average diameter of less than 0.5 ?m and a rubber latex, followed by removing the water from the mixture and a practical production method of the same and a pneumatic tire using the master batch.

Abstract: By spraying and drying a liquid containing a polymer component (e.g., natural rubber, synthetic rubber, etc.) and a liquid containing a filler (e.g., carbon black, silica, etc.) under an atmosphere of a shock wave generated from pulse combustion, a polymer containing a filler is produced at an improved work efficiency and heat efficiency, without causing degradation of the quality, etc. of the product.

Abstract: A method of manufacturing a pneumatic tire having an innerliner formed of thermoplastic elastomer. The method comprises the steps of: heating a surface of a tire building drum in advance; placing the innerliner on the heated surface of the tire building drum, the innerliner being cylindrically shaped and having a radially outer surface to which an adhesive has been applied; disposing uncured tire components radially outwardly of the innerliner to form a green tire; and curing the green tire.

Abstract: A laminate of an air permeation preventive layer an adhesive layer provided with an air permeation preventive layer comprising a thermoplastic elastomer composition containing a thermoplastic resin as a continuous phase and a rubber composition dispersed therein as a dispersed phase and arranged on one surface of the air permeation preventive layer, an adhesive composition layer having a thickness of 100 ?m or less, a self tack of less than 5N and a tack to an unvulcanized diene-based rubber or 5N or more, containing 100 parts by weight of a thermoplastic elastomer containing 50 parts by weight or more of an epoxy-modified styrene-butadiene-based block copolymer so that a total of 30 to 200 parts by weight of a terpene resin and an aromatically modified terpene resin having a weight average molecular weight Mw of 1000 or less and a softening point of 60 to 120° C., 0.1 to 3 parts by weight of an internal mold release agent and 0.1 to 2 parts by weight of an organic peroxide.

Abstract: A method of feeding a tire component according to the present invention comprises: winding in rolls tubular films formed of thermoplastic elastomer obtained by blending thermoplastic resin and rubber to form rolled bodies having sizes corresponding to different nominal rim diameters of tires; unwinding the tubular film from the rolled body corresponding to a nominal rim diameter of a green tire when the green tire is built, and cutting the unwound tubular film so as to form a piece having a necessary width corresponding to a size of the green tire to form a tire component; and feeding the tire component to a tire building machine.

Abstract: A pneumatic tire having a runflat capability provided with a crescent shaped reinforcing rubber layer at the side part thereof, wherein an inner layer is composed of a thermoplastic elastomer composition containing (A) at least one thermoplastic resin having an air permeation coefficient of 100×10?12 cc·cm/cm2·sec·cmHg or less and a Young's modulus of more than 500 MPa and (B) at least one elastomer ingredient having an air permeation coefficient of 50×10?12 cc·cm/cm2·sec·cmHg or more and a Young's modulus of 500 MPa or less in amounts of at least 30% by weight based upon the total polymer ingredients and having an air permeation coefficient of 100×10?12 cc·cm/cm2·sec·cmHg or less.

Abstract: A method for producing rubber from a latex by spraying and drying a rubber latex or, in the case of a natural rubber latex, a natural rubber latex, to which a viscosity stabilizing agent has been added when necessary, under an atmosphere of a shock wave generated from pulse combustion.

Abstract: A thermoplastic resin elastomer/rubber laminate comprising a rubber layer containing 100 parts by weight of a rubber and 0.1-20 parts by weight of an antioxidant preblended thereto and a thermoplastic resin elastomer composition layer, obtained by laminating at least two layers of the rubber layer and the thermoplastic resin elastomer composition layer followed by heating and pressing, whereby the antioxidant migrates from the rubber layer to the thermoplastic resin elastomer composition layer to improve the weathering resistance as well as a pneumatic tire using the same as an inner liner.

Abstract: An object of the present invention can be to provide a crosslinking agent which exhibits excellent storage stability and heat resistance and which is used for a composition containing a rubber and/or a resin. Such an object is realized by the compound represented by the following formula (1). In the formula, Z represents an active hydrogen-containing group; X represents a non-cyclic aliphatic group, a cyclic aliphatic group, an aromatic group, or an alkyl aromatic group, which may be optionally substituted and which may contain at least one member selected from SO2, O, N, and S; J1 and J2 which are respectively included at a number of n independently represent a monovalent group, or J1 and J2 together represent a divalent group; R1 which is included at a number of n independently represents hydrogen atom or a non-cyclic aliphatic group; and n represents an integer of 1 to 4.

Abstract: A pneumatic tire using an inner liner layer comprising a film of a thermoplastic resin, or a blend of a thermoplastic resin and an elastomer, having an air permeation coefficient of not more than 25×10?12 cc·cm/cm2·sec·cmHg and a Young's modulus of 1 to 1000 MPa, wherein a buffer rubber layer containing short fibers is arranged between the inner liner layer and a carcass layer in bead directions from two ends of a widest width belt layer in ranges of at least 20 mm, whereby a problem of trouble during production is solved and the durability of the inner liner layer is improved, without causing a problem of an increase in tire weight.

Abstract: A rubber composition containing 100 parts by weight a sulfur-vulcanizable rubber (A) and 0.1 to 30 parts by weight of a vulcanization agent of a cyclic polysulfide (B) having the formula (I): wherein R is a substituted or uhsubstituted C2 to C20 alkylene group, substituted or unsubstituted C2 to C20 oxyalkylene group or alkylene group having an aromatic ring, n is an integer of 1 to 20, x is a number of 2 to 6 on average.

Abstract: A tire wheel assembly having, attached to a tire/rim cavity, a run flat core member formed such that a high rigidity ring-shaped shell is supported at a rim with elastic rings, which are composed of a thermoplastic elastomer composition comprising a rubber composition (B) dispersed in a thermoplastic resin (A) or a hydrogen bondable thermoplastic elastomer comprising an elastomer polymer having a carbonitrile group-containing group and a heterocyclic amine-containing group at the side chain thereof and/or a composition of the thermoplastic elastomer, giving a tire wheel assembly of a run flat tire, in particular a tire wheel assembly capable of recycling the elastic rings for forming the core member.

Abstract: A peroxide-crosslinked rubber composition having a superior anti-blooming property of a crosslinking agent and a high hardness containing (A) more than 60 parts by weight but not more than 95 parts by weight of rubber selected from NR, IR, SBR, BR, EPM, EPDM, silicone rubber and/or fluororubber and (B) 5 parts by weight but less than 40 parts by weight of a polar polymer having a solubility parameter (Sp value) of at least 17.6 (Pa1/2) and a weight average molecular weight of at least 100,000.

Abstract: A thermoplastic elastomer composition dynamically vulcanized to a gelation rate of 50 to 95% which is superior in heat resistance and durability while maintaining flexibility and superior in air permeation preventive property which can be efficiently used as, for example, a pneumatic tire as an air permeation preventive layer. The method includes mixing a composition (C) mixed under conditions of a ratio of melt viscosities of the rubber composition (A)/resin (B) of 0.8 to 1.2 and the formula (?A/?B)×(?B/?A)<1.0 under conditions of a ratio of melt viscosities of the rubber composition (D)/composition (C) of 0.8 to 1.2 and the formula (?D/?C)×(?C/?D)<1.0, wherein ?A: volume fraction of rubber composition (A), ?B: volume fraction of resin (B), ?A: melt viscosity of rubber composition (A), ?B: melt viscosity of resin (B), ?C: volume fraction of composition (C), ?D: volume fraction of rubber composition (D), ?C: melt viscosity of composition (C), ?D: melt viscosity of rubber composition (D).