Abstract: Provided is a rubber composition that can achieve excellent on-ice performance and steering stability when used in tires. A rubber composition comprises: a rubber component containing an isoprene-based rubber, and a modified conjugated diene-based polymer that is a reaction product of a conjugated diene-based polymer having an active terminal and a compound [M] containing a total of two or more of at least one selected from a group “—CR1?N-A1” and a group “—N?CR1-A1”, where R1 is a hydrogen atom or a hydrocarbyl group and A1 is a monovalent group having an alkoxysilyl group; a filler containing at least silica; and 5 parts by mass or more of a thermoplastic resin with respect to 100 parts by mass of the rubber component.

Abstract: Provided is an epoxy resin which can improve the durability when used with a rubber material, and a method of producing an epoxy resin. In the present disclosure, a diene-based polymer is grafted onto a main chain of an epoxy resin.

Abstract: This disclosure provides a rubber composition that can realize excellent low heat generating properties without deteriorating other performance. The rubber composition contains a rubber component and a filler, where the rubber component contains a conjugated diene-based polymer modified with a modifier containing a compound represented by the formula (1).

Abstract: Provided is a rubber composition having excellent low heat generating properties. The rubber composition of the present disclosure contains a rubber component, a filler containing silica, and a silane coupling agent, where the rubber component contains a conjugated diene-based polymer modified with a modifier containing a compound represented by the formula (1), and the silane coupling agent is a compound represented by the formula (2).

Abstract: Provided is a rubber composition that realizes excellent low heat generating properties while maintaining good steering stability when applied to a tire. The rubber composition of the present disclosure contains a rubber component containing a copolymer having a conjugated diene unit and an aromatic vinyl unit, and a filler, where the copolymer is a modified copolymer having a content of the aromatic vinyl unit of less than 10 mass % and modified with a modifier containing a compound represented by the formula (1).

Abstract: An object of the present disclosure is to provide a rubber composition having satisfactorily low hysteresis loss, while maintaining high wear resistance. In order to achieve the object, a rubber composition contains: a rubber component having diene-based rubber therein; and a tetrazine compound.