An self-adhesive millable silicone rubber composition contains: 100 parts by mass of (A) an organopolysiloxane having at least two alkenyl groups bonded to silicon atoms per molecule and an average polymerization degree of 100 or more; 5 to 50 parts by mass of (B) a reinforcing silica having a specific surface area of 50 m.sup.2/g or more; 0.1 to 5 parts by mass of (C) an organosilicon compound having epoxy and alkoxy groups per molecule; 0.1 to 5 parts by mass of (D) an organosilicon compound having isocyanate group and alkoxy groups per molecule; and an effective curing amount of (E) a curing agent. The content of an organosilicon compound having a siloxane bond and benzene ring per molecule is 0 to 0.1 parts by mass, and the content of an organosilicon compound having a siloxane bond and an epoxy group per molecule is 0 to 0.1 parts by mass.

A room-temperature-curable organopolysiloxane composition comprising (A) an organopolysiloxane resin which contains silanol groups in a specified amount and has a specified molecular weight and a specified three-dimensional net-like structure, (B) a hydrolyzable organosilane compound containing an organooxymethyl group and/or a partial hydrolysis-condensation product thereof, (C) a linear diorganopolysiloxane of which each molecule chain terminal is capped with a silanol group, and (D) a hydrolyzable to organosilane containing an amino group and/or a partial hydrolysis-condensation product thereof at specified content ratios can be produced easily and at low cost, and can be formed into a high-hardness cured article or coating film even when a metal compound that can serve as a condensation catalyst is not contained.

A room-temperature-curable organopolysiloxane composition comprising (A) an organopolysiloxane resin which contains silanol groups in a specified amount and has a specified molecular weight and a specified three-dimensional net-like structure, (B) a hydrolyzable organosilane compound containing an organooxymethyl group and/or a partial hydrolysis-condensation product thereof, (C) a linear diorganopolysiloxane of which each molecule chain terminal is capped with a silanol group, and (D) a hydrolyzable to organosilane containing an amino group and/or a partial hydrolysis-condensation product thereof at specified content ratios can be produced easily and at low cost, and can be formed into a high-hardness cured article or coating film even when a metal compound that can serve as a condensation catalyst is not contained.

A rubber composition according to an embodiment contains a diene rubber and silica. A value Dm/Rg obtained by dividing a mass fractal dimension Dm of a silica aggregate by an inertia radius Rg of the silica aggregate is 0.20 nm.sup.−1 or more, the inertia radius Rg being obtained by irradiating a vulcanized rubber obtained by vulcanizing the rubber composition with X-rays to perform a small-angle X-ray scattering measurement, and the mass fractal dimension Dm being obtained by irradiating the vulcanized rubber with X-rays to perform an ultra-small angle X-ray scattering measurement.

A rubber composition according to an embodiment contains a diene rubber and silica. A value Dm/Rg obtained by dividing a mass fractal dimension Dm of a silica aggregate by an inertia radius Rg of the silica aggregate is 0.20 nm.sup.−1 or more, the inertia radius Rg being obtained by irradiating a vulcanized rubber obtained by vulcanizing the rubber composition with X-rays to perform a small-angle X-ray scattering measurement, and the mass fractal dimension Dm being obtained by irradiating the vulcanized rubber with X-rays to perform an ultra-small angle X-ray scattering measurement.

A sulfur-vulcanizable rubber compound comprises a silane functionalized diene elastomer, a silane coupling agent, and a silica filler. The silane coupling agent excludes an active sulfur moiety. The rubber compound is a reaction product of a siloxyl condensation reaction between the silane functionalized diene elastomer and the non-sulfur containing silane coupling agent. The coupling agent comprises at least one end terminating group reactive with a hydroxyl group contained on the silica filler and a silane moiety contained on a diene-based elastomer.

The present disclosures are directed to a composition comprising at least one silane functional amine; a method of preparing a silane functional amine; a rubber composition comprising at least one silane functional amine, at least one diene-based polymer, silica, at least one process aid, and a vulcanizing package comprising at least one vulcanizing agent comprising sulfur and at least one accelerator; and a process of preparing a rubber composition.

A tire comprising a tire frame that is formed of a resinous material and has a circular form, the resinous material including a thermoplastic polyamide-based elastomer, silica, and a silane coupling agent that has a functional group, the functional group including at least one selected from the group consisting of a nitrogen atom, a carboxyl group, an acid anhydride, and a ureido group.

A tire comprising a tire frame that is formed of a resinous material and has a circular form, the resinous material including a thermoplastic polyamide-based elastomer, silica, and a silane coupling agent that has a functional group, the functional group including at least one selected from the group consisting of a nitrogen atom, a carboxyl group, an acid anhydride, and a ureido group.

A tire comprising a tire frame that is formed of a resinous material and has a circular form, the resinous material including a thermoplastic polyamide-based elastomer, silica, and a silane coupling agent that has a functional group, the functional group including at least one selected from the group consisting of a nitrogen atom, a carboxyl group, an acid anhydride, and a ureido group.