a gas that is an isomer of butylene and which is used in the manufacture of butyl rubber. Formula: (CH3)2C=CH2
isobutylene in American English
(ˌaɪsoʊˈbjutəlˌin)
noun
a colorless, volatile liquid, (CH3)2C:CH2, obtained from gases in petroleum cracking: it polymerizes readily and is used in making synthetic rubber and resins