Patent ID: 7345017

Claim:
Oligo(1-butene), which is a thermal decomposition product of poly(1-butene), having an average terminal vinylidene group number per molecule (f TVD value) of from 1.53 to 1.75, a number-average molecular weight (M n ) of from 1,000 to 5,000, and polydispersity (M w /M n ) of 2.5 or less and comprising oligo(1-butene) containing vinylidene groups at both ends thereof and oligo(1-butene) containing a vinylidene group at a single end thereof, said oligo(1-butene) represented by the following formula (1a): wherein R b represents H 2 — or H 2 C═ and n is an integer of from 15 to 100.