| abstract |
The invention describes a composition comprising a) a naturally occurring or synthetic rubber susceptible to oxidative, thermal, dynamic, light-induced and/or ozone-induced degradation, b) a white reinforcing filler, c) a coupling agent selected from the group consisting of organofunctionalized silanes, polysulfide silanes, blocked mercaptosilanes, thio substituted silanes, sulfoxide or sulfone substituted silane coupling agents, and oligomeric hydrolysis product thereof, and d) a coupling agent regulator selected from the group consisting of cyclic or acyclic 1,2-disubstituted alkenes bearing two electron-withdrawing groups, cyclic or acyclic 1,2-disubstituted alkenes bearing one electron-withdrawing group and one electron-donating group, cyclic or acyclic 1,1-disubstituted alkenes bearing two electron-withdrawing groups, cyclic or acyclic 1,1-disubstituted alkenes bearing one electron-withdrawing group and one electron-donating group, and cyclic or acyclic trisubstituted alkenes bearing at least two electron-withdrawing groups. |