{HEAD ~ The composition} 1, wherein {TAIL ~ each R} is individually selected from the group consisting of alkyl radicals, cycloalkyl radicals, aryl radicals, alkaryl radicals, and aralkyl radicals, each of these radicals optionally substituted by halogen, amino, ester, epoxy, mercapto, cyano, or polyglycol radicals 
wherein
{ HEAD ~ The composition } 1 , wherein { TAIL ~ each R } is individually selected from the group consisting of alkyl radicals , cycloalkyl radicals , aryl radicals , alkaryl radicals , and aralkyl radicals , each of these radicals optionally substituted by halogen , amino , ester , epoxy , mercapto , cyano , or polyglycol radicals
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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH