Rubber composition, vulcanized product, and vulcanized molded body

A rubber composition comprising a chloroprene-based rubber, silica, a silane coupling agent, and a hydrate,

• wherein:
• the rubber composition comprises 5 to 80 parts by mass of the silica and 0.5 parts by mass or more and less than 20 parts by mass of the hydrate, with respect to 100 parts by mass of the chloroprene-based rubber;
• the rubber composition comprises 0.5 to 15 parts by mass of the silane coupling agent with respect to 100 parts by mass of the silica;
• and
• the rubber composition satisfies at least one of the following conditions i) and ii):
• condition i)
• the rubber composition comprises 3-methyl-thiazolidine-2-thione, and the rubber composition comprises 0.1 to 3.0 parts by mass of 3-methyl-thiazolidine-2-thione with respect to 100 parts by mass of the chloroprene-based rubber;
• condition ii)
• the rubber composition comprises a compound A and a compound B;
• the compound A is at least one selected from a group consisting of a thiourea-based compound, 3-methyl-thiazolidine-2-thione, and di(5-mercapto-1,3,4-thiadiazol-2-yl) disulfide;
• the compound B is at least one selected from a group consisting of a thiuram-based compound, a sulfenamide-based compound, a thiazole-based compound, a guanidine-based compound, a benzimidazole-based N-phenyl-N-compound, (trichloromethylthio)benzenesulfonamide, and a diazabicycloundecene-based compound;
• and
• the rubber composition comprises 0.1 to 3.0 parts by mass of the compound A and 0.01 to 3.0 parts by mass of the compound B with respect to 100 parts by mass of the chloroprene-based rubber.