SINCE 1828
diisobutylene
noun
di·isobutylene
| \ (¦)dī+\
Definition of diisobutylene
: a liquid mixture containing the two octylenes 2,4,4-trimethyl-1-pentene and 2,4,4-trimethyl-2-pentene obtained from isobutylene by reaction with acid catalysts and used as an intermediate (as for plastics)
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