Patent ID: 7358313

Claim:
A rubber composition based on at least (i) a diene elastomer, (ii) a reinforcing filler and (iii) a thiouronium salt or an analogue of a thiouronium salt, wherein both the thiouronium salt and the analogue of a thiouronium salt satisfy the formula (I) below: A-S—Y—S-A (I) in which, A represents a group associated respectively with a molecule HX or an ion X; X denotes a halogen atom, and Z denotes in which the radicals R 1 , R 2 , R 3 , R 4 and R 5 , which may be identical or different, denote a hydrogen atom or a linear or branched, monovalent hydrocarbon group selected from the group consisting of C 1 -C 6 alkyl, C 2 -C 8 alkenyl, C 5 -C 8 cycloalkyl, aryl and aralkyl groups, the alkyl radical of the aralkyl group being C 1 -C 6 , or alternatively R 2 and R 3 or R 5 and R 3 form with the nitrogen atoms to which they are linked an unsaturated heterocycle having from 3 to 5 carbon atoms, substituted or unsubstituted by one or more C 1 -C 6 alkyl radicals, said heterocycle being conjugated or unconjugated with a benzene nucleus, and R 1 and R 4 denote hydrogen, C 1 -C 6 alkyl or C 2 -C 8 alkenyl; Y represents a divalent hydrocarbon group selected from the group consisting of an alkylene radical having 1 to 20 carbon atoms, a cycloalkylene radical having 6 to 24 carbon atoms, an arylene radical having 6 to 18 carbon atoms and an aralkylene radical having 7 to 25 carbon atoms, the alkylene radicals being linear or branched optionally interrupted by one or more heteroatoms selected from the group consisting of O and N.