Crosslinkable and crosslinked {HEAD ~ compositions} comprising {TAIL ~ silicon compounds}, unsaturated elastomeric polymers and polyenes 
comprising
Crosslinkable and crosslinked { HEAD ~ compositions } comprising { TAIL ~ silicon compounds } , unsaturated elastomeric polymers and polyenes
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH