Ten carboxylated butadiene-acrylnitrile rubber comps. were prepd. by mixing the resp. rubbers with S (6%) and an accelerator (0.5-2.5%) and vulcanized at 160 degrees C by using a corn. rheometer. The vulcanizates were studied for mech. properties. The tensile strength and the Schopper abrasivity increased and optimum vulcanization time, Shore hardness and permanent strain after compression decreased with the increasing S content. The Mooney plasticity, relative elongation, elasticity modulus, ageing resistance, and brittleness temp. did not depend on the rubber compd. compn.