AbstractCopolymers of vinylsulfonic acid derivatives with butadiene, isoprene, and styrene have been prepared. The evaluation of butadiene‐vinylsulfonic acid ester copolymers indicates that these rubbers have good low‐temperature characteristics and that the stress‐strain properties of then‐butyl vinylsulfonate copolymer approach those of the standard GR‐S rubber; however the oil resistance properties are poor. The stress‐strain properties of the butadiene‐n‐hexyl vinylsulfonate copolymer are inferior to those of th