{HEAD ~ The curing composition} 1, wherein {TAIL ~ the component} is tin carboxylate which is a non organotin compound and in which the carbon atom adjacent to the carbonyl group is a quaternary carbon atom 
wherein
{ HEAD ~ The curing composition } 1 , wherein { TAIL ~ the component } is tin carboxylate which is a non organotin compound and in which the carbon atom adjacent to the carbonyl group is a quaternary carbon atom
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH