Noun
English Wikipedia has an article on:hexafluoropropyleneWikipedia
hexafluoropropylene (plural hexafluoropropylenes)
(organic chemistry) The fluorinated derivative of propylene CF3-CF=CH2
DAI-EL™ G-7201 by Daikin is a fluorinated hydrocarbon rubber (FKM) copolymer grade comprising of vinylidenefluoride and hexafluoropropylene. Source: Internet
Viton™ AL-300 by Chemours is a low viscosity fluoroelastomer terpolymer grade consisting of hexafluoropropylene, vinylidene fluoride, and tetrafluoroethylene. Source: Internet