This invention relates to fluorochemical compounds and compositions for use in providing {HEAD ~ repellent properties} to {TAIL ~ a substrate material} 
This invention relates to fluorochemical compounds and compositions for use in providing { HEAD ~ repellent properties } to { TAIL ~ a substrate material }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL