. "A method of improving properties of vulcanized filled elastomeric compositions which comprises vulcanizwherein R and R together may also form a cycloaliphatic ring having from 5 to 7 carbon atoms in the ring and from 5 to 10 carbon atoms, including lower alkyl, attached to the ring, or wherein R and R may be linked by a member of the group consisting of O, S and N t. and wherein the number of carb" . . .