Abstract: The present invention relates to a devulcanized rubber obtained by mixing a devulcanizing agent having an alkylsulfonamide group and a vulcanized rubber. The devulcanizing agent preferably contains a sulfonamide compound of an alkylamine having 12 or more carbon atoms. The present invention also relates to a rubber composition comprising the devulcanized rubber. The rubber composition preferably contains 1 to 30 parts by mass of the devulcanized rubber per 100 parts by mass of a total amount of an unvulcanized rubber component in the rubber composition.

Abstract: The present invention relates to a devulcanized rubber obtained by mixing a devulcanizing agent having an alkylamide group and a vulcanized rubber. The devulcanizing agent is preferably an amide compound of an alkylamine having 12 or more carbon atoms. The present invention also relates to a rubber composition comprising the devulcanized rubber. The rubber composition preferably contains 1 to 30 parts by mass of the devulcanized rubber per 100 parts by mass of a total amount of an unvulcanized rubber component in the rubber composition.

Abstract: A desulfurized rubber obtained by mixing a desulfurization agent and a vulcanized rubber, the desulfurization agent containing a compound represented by any one of the following formulae (1) to (4): wherein R1 to R8 each independently represent a hydrogen atom, an oxygen atom, or an alkyl group. It is preferable that the desulfurization agent contains at least one selected from the group consisting of 2,2?-dithiodianiline and 4,4?-dithiodianiline.